JPH11314833A - Paper post-processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lowering of efficiency of processing due to abnormality caused at the paper binding processing by enabling use of only a processing necessary to proceed a process in which abnormality is detected in the case that abnormality is detected in a part of process of the binding processing. SOLUTION: In case that a mold home sensor 50 is not switched ON even though the value of a timer T1 becomes A, a mold is judged to be abnormal, therefore a mold abnormal signal is transmitted to a CPU 2, the abnormal alarm of the mold is displayed on a display part 54, and also a predetermined saddle stitch prohibiting processing is performed. This alarm is such as, 'A paper folding part is out of order', 'please call a service man', 'saddle stitch function is disengaged', or 'please reset a main switch'. The processing is performed same in a case that abnormality is detected in an initial action and in a copying action. Thus, in the case that abnormality is detected in the mold, the operation of a machine is once stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper post-processing apparatus for performing binding processing as post-processing on paper processed by a paper processing apparatus such as a printer, a copying machine, and a printing machine.
When an abnormality such as device damage is found in a part of the binding process including a plurality of processes, instead of disabling the entire machine, only the process that needs to go through the abnormal process is disabled, The present invention relates to a paper post-processing apparatus capable of improving the use efficiency of a machine.

[0002]

2. Description of the Related Art Conventionally, as a typical example of a method of binding a plurality of sheets by using staples, there are edge binding and saddle binding. In the former case, the ends of a plurality of sheets of paper that have been superimposed without folding are stapled. In the case where two staples S1 are driven with the center of the end of the sheet P being distributed as shown in FIG. 16 (1), flat binding is performed, and in the case where staples S2 are driven into corners as shown in FIG. 16 (2), corner binding is performed. is there. The latter saddle stitching is performed by two staples S3 on the center line of the superposed sheets as shown in FIG.
And bending along the center line. In the saddle stitching, since the folding process is performed, the leading ends of the sheets are not aligned. Therefore, the sheets are cut along the two-dot chain line L1 prior to bookbinding. Also, as a method of saddle stitching,
There are a case where the sheet is folded first and the stapling process is performed, and a case where the sheet is folded after the stapling process (referred to as a simple saddle stitch). Since the former forms a complete fold, it has been used more frequently in printing machines and bookbinding machines. Although the latter has a somewhat incomplete crease, it can be achieved with a relatively simple apparatus, and has recently been used in post-processing apparatuses for image forming apparatuses such as copying machines and printers. Also in the case of the present invention, the latter case of the simple saddle stitching is handled.

FIG. 1 is a front sectional view showing an example of a sheet post-processing apparatus to which the present invention can be applied. In this case, the saddle stitching process and the edge stapling process can be selectively executed, and as described later, in both stapling processes, a common process is performed up to the stapling process to simplify the apparatus. I have. A sheet post-processing apparatus 10 as shown in FIG. 1 is configured to staple, bind, fold, cut, and discharge sheets discharged from an image forming apparatus (not shown) connected on the right side of the drawing. To perform post-processing of the sheet. Therefore, on the right side of the post-processing device 10, a paper feed port 11 for receiving the image-formed sheet discharged from the image forming apparatus is provided. The transport path 12 connected to the paper feed port 11 includes a transport path 13 for transporting the paper upward and a transport path 14 for transporting the paper downward.
Are connected. The transport path 12 and the transport paths 13 and 1
A switching claw 15 for switching the transport direction of the sheet is provided at the branch portion 4 so as to be swingable. The upper transport path 13 is connected to a discharge section 16 at an outlet thereof, and a discharge roller 17 is provided at the outlet. Reference numeral 37 denotes a discharge tray connected to the discharge unit 16, which is inclined upward in the discharge direction. In the lower transport path 14, three switching claws 18a, 18b, and 18c are arranged in order from the upstream side to the downstream side in the paper transport direction.
Each of the switching claws 18a, 18b, 18c is swung between a solid line position and an alternate long and short dash line position, and switches the conveying direction of the sheet passing through the switching claws 18a, 18b, 18c. The paper is conveyed by the frictional force by rotating the switching portion by each switching claw and the swing center of the switching claw 18c, and the paper conveyed later by moving the edge of the paper as described later. Rollers 19a, 19b, 1 for preventing interference between
9c and 19d are rotatably mounted. 20
Reference numerals a, 20b, 20c, and 20d denote auxiliary rollers which rotate together with the brush roller and feed out the sheet. The lower transport path further includes the brush roller 19a (or 19).
b, 19c, and 19d) and the auxiliary rollers 20a (or 20b, 20c, and 20d), and the auxiliary rollers 20a, 20b, and 20c.
It branches into an outer transport path 14b formed outside 20d, and a switching claw 21 for switching between the two transport paths 14a and 14b is provided at the branch portion so as to be swingable. On the opposite side of the auxiliary rollers 20a, 20b, 20c, and 20d across the brush rollers 19a, 19b, 19c, and 19d, an intermediate tray 22 is provided in parallel with these brush roller rows.
Is provided. The intermediate tray 22 is separated in a direction perpendicular to the paper surface of FIG.
Endless belt 23 is stretched along. Endless belt 2
3 is stretched between the belt rollers 24a and 24b,
By traveling in the direction of arrow X, the sheet supplied onto the intermediate tray 22 and bound at the end is directed obliquely upward (in the direction of arrow X) by the sheet receiver 26 fixed to the surface of the endless belt 23. Transport. Above the endless belt 23, a guide member 34 for guiding the sheet to the discharge section 33 and a discharge roller 35 are provided. A discharge tray 38 that is inclined upward in the discharge direction is connected to the discharge unit 33 so as to easily receive the sheet bundle bound at the end.
The discharge tray 38 has an endless belt 39 stretched up and down.
, And is moved up and down by the endless belt 39 in accordance with the amount of discharged paper while being guided by a guide mechanism (not shown). Reference numeral 25 denotes a pair of cursors provided at both ends of the intermediate tray 22 (to the left and right as viewed from the front), and reciprocates in a direction perpendicular to the paper surface to move the paper supplied on the intermediate tray 22 in the transport direction of the paper. Align at right angles to. The sheet receiver 26 is in a position indicated by a solid line in a standby state (a state of waiting for sheet supply), and the lower end of the sheet supplied in the intermediate tray 22 is brought into contact with the sheet tray 26 to align the sheets in the vertical direction. Make At the lower end of the intermediate tray 22, a pair of transport rollers 27 (which feeds the intermediate tray 22 and holds the paper set on the paper receiver 26 by sandwiching the paper, and transports the paper downward by rotating the paper tray 27 ( 27a, 27b) are provided. One roller 27 constituting the transport roller pair 27
a is in the open position indicated by the solid line in the standby state,
After a predetermined number of sheets are supplied, the sheet bundle is closed to the dashed line position and the sheet bundle is gripped. Further, at a position at the lower end of the intermediate tray 22 which does not interfere with the pair of transport rollers 27, the upper stapler 2 which is separated from the upper and lower sides of the fed sheet is sandwiched.
A stapler 28 including a stapler 8a and a lower stapler 28b is provided. In this embodiment, the position of the stapler 28 in the paper transport direction is fixed, and the paper side is moved by the transport roller pair 27 to adjust the staple driving position. In the middle of a series of sheet guides 39a and 39b provided below the intermediate tray 22, a sheet bundle (already stapled to the saddle stitch position) conveyed and positioned by the conveying roller pair 27 is temporarily stored. A gripping member 40 for gripping the paper bundle and a pressing mold 29 for bending the sheet bundle along the center line thereof are provided so as to be able to reciprocate in the arrow Y direction. The two pairs of bending rollers 30 are provided at positions facing the above-described pressing die 29, and rotate to form the pressing die 2.
In step 9, the sheet pressed in is bent, and the sheet is conveyed to the subsequent cutting unit 31. The trimming unit 31 includes cutters 31 a and 31 b that cut the ends of the saddle-stitched sheet bundle, and transport rollers 36 that transport the trimmed sheets to the discharge unit 32. Reference numeral 42 denotes a discharge tray for receiving discharged sheets, which is inclined downward in the transport direction so as to receive a large amount of saddle-stitched sheets.

Next, the structure of the post-processing apparatus 10 will be further described with reference to the movement of a sheet in the post-processing apparatus 10. (In the case where stapling is not performed) In this case, the switching claw 15 is switched to the position indicated by the one-dot chain line, and the paper supplied from the supply port 11 is transferred to the upper transport path 1.
3 and reaches the discharge roller 17, and is discharged from the discharge unit 16 onto the discharge tray 37. (In the case of performing stapling processing) In this case, the switching claw 15
The position is switched to the upper position shown by the solid line, and the lower switching claw 21 is switched to the solid line position shown in the figure.
As a result, the sheet carried in from the supply port 11 passes between the switching claws 15 and 21 and heads toward the inner conveyance path 14a. At this time, the switching claws 18a to 18b are switched according to the size of the sheet to be conveyed. In this example, sheets of four different sizes can be cut and processed. For example, when the largest size paper that can be processed is conveyed, the switching claw 18a is switched to the dashed line position, and the paper is moved from the inner conveyance path 14a to the position between the switching claw 18a and the brush roller 19a. Through the intermediate tray 22. When the sheet of the second largest size is supplied, the switching claw 18a is switched to the dashed-dotted line position, while the switching claw 18b is switched to the solid line position.
Then, the sheet is supplied to the intermediate tray 22 while passing through the inner transport path 14a and changing the direction at the switching claw 18b. Similarly, in the case of the next smaller size paper, the switching claws 18a and 18b are at the solid line positions and the switching claws 18c
Is switched to the dashed line position, the paper changes its traveling direction along the switching claw 18c, and the intermediate tray 2
2 is supplied. Further, in the case of the paper of the smallest size, all the switching claws 18a to 18c are switched to the solid line position, and the paper passes between the lowermost brush roller 19d and the auxiliary roller 20d, and passes through the intermediate tray 2
2 is supplied. The paper supplied to the intermediate tray 22 is
The paper receiver 2 whose lower end is at a predetermined position indicated by a solid line
Stops in contact with 6. Therefore, all the sheets are vertically aligned in the intermediate tray by placing the sheets on the sheet tray 26. Alignment in the direction perpendicular to the transport direction is achieved by the cursor 25 reciprocating in the direction perpendicular to the plane of the paper, thereby positioning the sheet. That is, in both the edge binding process and the saddle binding process, the binding process is performed in the intermediate tray 22, but the subsequent paper transport path and process are different depending on the process as described below. However, there is room for improvement as described in the “Problem” below.

A. In the case of edge binding In the case of edge binding including flat binding and corner binding described above,
The upper and lower staplers 28a and 28b are closed at the position where the alignment in the transport direction and the direction perpendicular to the transport direction is performed as described above, and stapling is performed. When the stapling process is completed, the endless belt 23 travels in the direction indicated by the arrow X, and the sheet receiver 26 rises to push the stapled sheet upward. The pushed-up sheet is guided by the guide member 34 at its leading end, is further gripped by the rotating discharge roller 35, and is discharged to the discharge tray 38. B. In the case of saddle stitching When saddle stitching is performed, the transport roller 27a is pressed against the sheet bundle in the aligned state described above and fixed. In this state, the endless belt 23 runs in the direction opposite to the arrow X,
The paper receiver 26 is retracted to the position (26a) indicated by the dashed line. Subsequently, the paper is fed downward by the rotation of the upper and lower transport rollers 27a and 27b. The fed paper advances in the paper guides 39a and 39b. When the center line of the paper reaches the binding position of the stapler 28, the rotation of the transport roller pair 27 stops, and staple driving is performed at that position. It is. When the stapling process is completed, the transport roller pair 27
27a and 27b start rotating again to feed the sheet further downward. The conveying roller pair 27 stops when the center line of the sheet on which the staples are driven comes to the position of the pressing die 29. In this manner, the gripping member 40 grips the sheet while the sheet is fixed by the pair of conveying rollers 27, and the pair of conveying rollers 27 is opened to release the fixing of the sheet. In this manner, the pressing die 29 is held in a state where the sheet is gripped only by the gripping member 40.
Is advanced, and the sheet is bent and inserted into the rotating pair of bending rollers 30. At this time, the transport roller pair 27
The press mold 29 is pressed against the sheet, and the grip is released when the sheet is gripped. The sheet that has been bent by the folding roller 30 is sent out by the rotation of the folding roller 30 and enters the cutting section 31. In the cutting section 31, a cutter 3 that cuts an end of the sheet while sandwiching the sheet from above and below
1a (movable side) and 31b (fixed side) are provided in this order, and the edge of the sheet is cut to improve the appearance of the edge of the sheet bundle. The paper that has been trimmed is fed to the discharge rollers 36.
Is discharged from the discharge section 32 to the discharge tray 42. In the above example of the apparatus, the center binding position of the paper is adjusted by the transport roller 27.
In such a case, it is also conceivable to adjust the saddle stitching position by adjusting the stop position of the sheet receiver by increasing the moving distance of the paper stapler. Further, instead of adjusting the end stapling position and the saddle stitching position according to the sheet size by fixing the upper and lower staplers 28a and 28b and adjusting the sheet position, the pair of upper and lower staplers 28a and 28b are moved. The staple position may be adjusted. In the above-described apparatus example, the edge-bound paper is transported upward from the binding position, and the saddle-bound paper is transported downward from the binding position. Conversely, the edge-bound paper is transported downward from the binding position. And the saddle-stitched sheet may be sent upward from the binding position. Such a device also constitutes the device on which the present invention is based.

[0006]

The above-described conventional apparatus is an example of a sheet post-processing apparatus capable of selectively performing edge binding and saddle stitching. Such a device can selectively perform edge binding and saddle stitching. There are various other devices, but as is already understood, these devices require many steps such as paper transport, binding processing, folding and cutting, and give plastic deformation to the paper. Since machining is performed, various abnormal states may occur in some cases. Particularly, in the bending step and the cutting step in the saddle stitching processing after the staple driving step, since a step requiring a force to bend or cut the sheet bundle is required, abnormalities such as drive motor lock and disconnection due to overload are required. It may fall into a state. However, in the conventional device as described above,
In any device, when an abnormal state occurs, the entire machine is stopped, and when the abnormality is confirmed, the operator restarts the entire machine again. For example, the push die 29 used exclusively for the saddle stitching process is used. In the event of a paper jam or an abnormality in the cutting unit 31, the device cannot be used for the edge binding process that can be performed regardless of the abnormality in the saddle stitching unit. There was room. SUMMARY OF THE INVENTION The present invention has been made for the purpose of providing a sheet post-processing apparatus capable of solving all of the above problems at once.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a sheet post-processing apparatus for performing a binding process on a plurality of stacked and aligned sheets. A sheet post-processing device is characterized in that, when an abnormality is found, only processes that need to go through the process in which the abnormality is found are disabled. Here, the type of the binding process may include one or both of saddle stitching and edge stitching. The saddle stitching process can be configured to include a folding process. Also, a part or all of the unavailable processing can be displayed.

[0008]

According to the first aspect of the present invention, only the process which goes through the process in which the abnormality is found cannot be used. In other words, the process in which no abnormality occurs is executed regardless of the occurrence of the abnormality. The use efficiency of the machine is remarkably improved as compared with a conventional device in which the entire machine becomes unusable when an abnormality occurs. If the type of processing is set as in claim 2, even if an error occurs in either the saddle stitching or the edge stapling, other processing can be executed, and the machine usage rate is reduced. improves. By including the folding processing section having a high abnormality occurrence rate as in claim 3, even if an abnormality occurs therein, the operation can be continued without stopping the entire machine. In addition, the configuration as claimed in claim 4 allows the operator to know the unusable portion from an early stage, and eliminates inefficiency such as an unsuccessful attempt to perform the unusable process.

[0009]

Next, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a hardware block diagram showing a connection state of a drive motor such as a push-type drive motor and the like with a sensor for abnormality detection, a display unit for abnormality display, and a CPU used in the embodiment of the present invention. FIGS. 8 to 15 are flowcharts showing processing procedures corresponding to various processes, and FIGS. 8 to 15 are diagrams showing display states of the operation unit which change according to various processes. [Hardware Configuration] In the abnormality processing apparatus according to the present embodiment, a hardware configuration as shown in FIG. 2 is employed, but this is merely an example and does not limit the scope of the invention. In the abnormality processing apparatus shown in FIG. 2, the processing on the sheet post-processing apparatus side is mainly performed by the CPU 1, but this CPU 1 only takes charge of the abnormality processing in the sheet post-processing apparatus. The processing by the CPU 2 is performed.
As shown in FIG. 2, in the abnormality processing apparatus according to the present embodiment, a push-type home sensor 50 for detecting an initial position of the push-type mold 29 is provided to an I / O port of the CPU 1 for abnormality processing.
A folding roller rotation sensor 51 for detecting the rotation of the folding roller 30, a cutting cutter home sensor 52 for detecting the initial position of the cutting cutter 31a, and a discharge for detecting the discharge of the sheet from the folding roller 30 to the cutting section 31. The paper sensors 53 are respectively connected. The push-type home sensor 50 detects that the push-type mold 29 shown in FIG. 1 has reached the initial position shown by the solid line, and is provided behind the push-type mold 29 as shown in FIG. The folding roller rotation sensor 51 is configured by a pulse detector that detects rotation of a pulse plate provided integrally with the folding roller 30. The cutting cutter home sensor 52 is provided above the movable cutting cutter 31a as shown in FIG.
The paper discharge sensor 53 is provided at the exit of the folding roller 30 and detects a sheet discharged from the folding roller. The output unit of the CPU 1 includes a CPU 2 for controlling the image forming apparatus, a drive motor 55 for the push mold 29,
The drive motor 56 of the cutting cutter 31 and the drive motor 57 of the bending roller 30 are connected to each other.
The CPU 2 is connected to a display unit 54 provided on an operation unit of the image forming apparatus main body, and performs display according to a command from the CPU 1.

Next, a description will be given of a processing procedure when various abnormal states occurring in the saddle stitching processing section are detected. These steps are roughly divided into those for the initial operation of each element,
It can be divided into those that can be used during normal operation. The initial operation is
When the power is turned on, each element that operates for the saddle stitching process (here, only the folding mold 29, the folding roller 30, and the cutting cutter 31 will be described. However, this is an example, and this is an example. This includes a case where abnormal processing is performed together with other elements or elements of the edge binding processing unit), but returns to a predetermined initial position. “Abnormality at Initial Operation” FIG. 3 is a flowchart showing a procedure of an abnormality process at the time of the initial operation of the press die 29. When the power is turned on,
First, in step A1, it is determined whether the push-type home sensor 50 is in the ON state, that is, whether the push-type mold 29 has returned to the initial position. If the pressing die 29 is not at the initial position, the pressing die driving motor 55 is turned on (rotated) at A2, and at the same time, the timer T1 set in the CPU 1 is reset and set, and time measurement is started (A3, A).
4). If the push type home sensor 50 is turned on before the value of the timer T1 reaches the predetermined set value A, the push type 29
Indicates that it has reached the initial position normally (A5,
A6), the push-type drive motor 55 is stopped (A7), and the process ends. If the push-type home sensor 50 does not turn on even when the value of the timer T1 becomes A, it can be determined that the movement of the push-type mold 29 is abnormal. An abnormality alarm of the mold 29 is displayed on the display unit 54 (A8), and a predetermined saddle stapling prohibition process is performed. The warning and saddle stitching prohibition processing is the same as the abnormality warning and prohibition processing during normal operation shown in FIG. 12, and will be described later in detail. Next, abnormal processing during the initial operation of the cutting cutter 31a on the movable side shown in FIG. 4 will be described. FIG. 4 is a flowchart showing a procedure of an abnormal process at the time of the initial operation of the cutting cutter 31a. When the power is turned on, first, in step B1,
It is determined whether the cutting cutter home sensor 52 is in the ON state, that is, whether the cutting cutter 31a has returned to the initial position. If the cutting cutter 31a is not at the initial position,
In 2, the cutting cutter drive motor 56 is turned on (rotated), and at the same time, the timer T2 set in the CPU 1 is reset, and time measurement is started (B3, B4). If the cutting cutter home sensor 52 is turned on before the value of the timer T2 reaches the predetermined set value D, the cutting cutter 31
a indicates that it has reached the initial position normally (B
5, B6), the cutting cutter drive motor 56 is stopped (B
7), the process ends. If the cutting cutter home sensor 52 does not turn on even if the value of the timer T2 reaches D, it is possible to determine that the cutting cutter 31a is abnormal. Is displayed on the display unit 54 (B8), and a saddle stapling prohibition process is performed in a predetermined manner. This warning and saddle stapling prohibition processing is the same as the abnormality warning and prohibition processing during normal operation shown in FIG. 14, and will be described later in detail. “Normal Operation Abnormality” Next, an abnormality process during the normal operation of the press die 29 will be described with reference to the flowchart shown in FIG. When the initial operation shown in FIGS. 3 and 4 and the subsequent increase in the fixing temperature on the image forming apparatus side are completed, normal image forming processing becomes possible.
Normal operation starts. At this time, the display unit 54 of the image forming apparatus performs a standby display such as "copying is possible" as shown in FIG. Here, when the operator presses the saddle stitching selection key 58 of the operation unit, the binding state display unit 59 displays the saddle stitching as shown in FIG.
4. A message such as "Read the original. Set the original in the DF (original feeder) and press the start key" is displayed. Here, when the operator presses the start key 60 and the reading of the original is completed, the display unit 5
The screen of FIG. 4 is switched as shown in FIG. 10 to a screen for requesting the selection of the paper type and the selection of the pattern (cutting). As shown in FIG. 10, the type of paper (in this case, A
3) and select "Yes" or "No" for cutting and set key 61
By pressing, the screen is switched back to the original screen and the display 5
4. A message such as "Saddle stitching is possible. Please press the start key" appears. Here, when the start key 60 is pressed, a normal copying operation is started. In the setting of FIG. 11, an original of A3 size is read and reduced to 70% to 9
The figure shows a case where the document is rotated by 0 degrees and divided into planes, and is copied on A3 paper. The abnormality detection during such a normal operation will be described below. In FIG. 5, it is determined that the pressing die does not return to the initial position within a predetermined time, and that the pressing die is abnormal. In this case, since it is assumed that the press die returns to the initial position in the initial operation, the procedure (A1) of the initial position confirmation as shown in FIG. 3 is omitted. As shown in the figure, first, in step C1, the push-type drive motor 5
5 is turned on (rotated), and at the same time, the timer T1 set in the CPU 1 is reset and set, and time counting is started (C2, C3). When the value of the timer T1 is a predetermined set value A
When the push-type home sensor 50 is turned on before the pressure reaches the value, it indicates that the push-type mold 29 is operating normally (C4,
C5), the push-type drive motor 55 is stopped (C6), and the process ends. If the push-type home sensor 50 does not turn on even when the value of the timer T1 reaches A, it can be determined that the push-type mold 29 is abnormal. The display 54 displays the abnormality alarm
(C7) and a predetermined saddle stapling prohibition process is performed. For example, as shown in FIG. 12, this alarm may indicate "The paper folding unit has failed. Please call a service technician.
-Xxxx) (abnormal code) Cut off the saddle stitching function.
Turn on the main switch (power switch) again. ". As described above, this process is the same when an abnormality is found during the initial operation and the copying operation. As described above, when an abnormality is found in the press die 29, the operation of the machine is stopped once. When the operator turns on the power again, the screen changes as shown in FIG. 13, and the message “Can be copied. The paper folding unit is out of order. Saddle stapling cannot be selected.
L please. (C-xxx) "is displayed. That is, in this case, even when the operator presses the saddle stitching key 58, the saddle stitching process is not selected. However, since edge binding is possible, the edge binding keys 62a, 62b, 62
When any one of c, 62d, and 62e is pressed, end processing corresponding to those keys is executed. Of course, a simple copy operation is also possible. In short, any processing that does not pass through the pressing mold 29 is possible.

Next, the cutting cutter 31 during normal operation
The abnormality detection of a will be described. FIG. 6 shows that the cutting cutter 31a does not return to the initial position within a predetermined time.
Judge as abnormal. Also in this case, since it is premised that the cutting cutter 31a has returned to the initial position in the initial operation, the procedure (B) of the initial initial position confirmation as shown in FIG.
1) is omitted. As shown in the figure, first, in step D1, the cutting cutter drive motor 56 is turned on (rotated), and at the same time, the timer T2 set in the CPU 1 is reset and set, and time measurement is started (D2, D).
3). If the cutting cutter home sensor 52 is turned on before the value of the timer T2 reaches the predetermined set value D, it indicates that the cutting cutter 31a is operating normally (D
4, D5), the cutting cutter drive sensor 56 is stopped (D
6), end the process. If the cutting cutter home sensor 52 does not turn on even if the value of the timer T2 reaches D, it is possible to determine that the cutting cutter 31a is abnormal. Is displayed on the display unit 54 (D7), and a predetermined saddle stapling prohibition process is performed. For example, as shown in FIG. 14, this warning is displayed as follows: "The cutting unit is out of order. Please call a service technician. (C-xxxx)
(Abnormal code) Cut off the cutting function. Turn on the main switch (power switch) again. ". As described above, this process is also performed when an abnormality is found during the initial operation and the copying operation. As described above, when an abnormality is found in the cutting cutter 31a, the operation of the machine is stopped once. When the operator turns on the power again, the screen returns to the standby display of FIG. 8, but the saddle stitching key 58 is pressed again. Thereafter, when the reading of the original is completed, the screen switches as shown in FIG. Select and press the setting.The cutting section is out of order.You cannot select "With cutting". Please TEL to the service person. (C-XXX) "is displayed. That is, in this case, even if the operator presses the trimming key, the trimming process is not selected. However, since saddle stitching processing without cutting is possible, if there is no need to align the paper edges slightly, processing can be performed without any problem. Of course, since edge binding is also possible, the edge binding key 62a,
By pressing any of 62b, 62c, 62d, and 62e,
Not only the end processing corresponding to those keys is executed, but also a simple copy operation is possible. In short, any processing that does not cut is possible as it is.
Finally, abnormal processing due to poor rotation of the folding roller 30 and a jam shown in FIG. 7 will be described. Bending roller 3
For 0, there is no such thing as an initial position. As shown in the figure, first, in step E1, the folding roller drive motor 57 is turned on (rotated), and at the same time, the CPU 1
Is set and reset, and time measurement is started (E2, E3). At the same time, the presence or absence of a pulse input from the folding roller rotation sensor 51 is determined (E
4) If there is a pulse input, it is determined that the bending roller 30 is rotating. Subsequently, if the sheet discharge sensor 53 is turned on before the value of the timer T3 reaches the predetermined set value B, it is determined that the leading end of the sheet has passed the folding roller unit (E6). If there is no pulse input from the folding roller rotation sensor 51 at E4, a notification of the abnormality of the folding roller is issued to the display unit 54 at E5. If the sheet discharge sensor 53 does not detect the sheet even after the predetermined time B has elapsed in E5, a notification of a jam at the folding roller unit is displayed on the display unit 54 in E8. The fact that the sheet has completely passed through the folding roller 30, that is, that no jam has occurred in the folding roller portion, means that the time (C) has elapsed since the sheet ejection sensor 53 was turned on and further matched the sheet length. Later, it is necessary that the discharge sensor 53 be turned off. Therefore, after step E6, the timer T4
Are reset (E7) and set (E8), and if the paper discharge sensor 53 is turned off (E9, E10) within the time C, it is determined that the paper discharge has been completed normally and the folding roller drive motor 57 Is stopped (E11). Also, E
In 9, when it is determined that the paper discharge sensor 53 does not turn off within the time C, it can be determined that a jam has occurred in the folding roller unit, and a jam notification of the folding roller unit is displayed on the display unit 54. (E12).
Among these alarms, the processing for the abnormality notification is the same as the mechanical stop and the saddle stitching part use prohibition processing at the time of an abnormality in the press die, and thus the description thereof is omitted here. In addition, the procedure for the jam notification is widely known to prompt the user to perform the processing, and to return the function to normal after the jam processing.

[0012]

As described above, according to the first aspect of the present invention, only the processes that go through the process in which an abnormality is found cannot be used. Irrespective of the occurrence of the error, the use efficiency of the machine is remarkably improved as compared with the conventional apparatus in which the entire machine becomes unusable when an abnormality occurs. If the type of processing is set as in claim 2, even if an abnormality occurs in either the saddle stitching processing unit or the end stapling processing unit, other processing can be executed, Machine utilization is improved. By including the folding processing section having a high abnormality occurrence rate as in claim 3, even if an abnormality occurs therein, the operation can be continued without stopping the entire machine. In addition, the configuration as claimed in claim 4 allows the operator to know the unusable portion from an early stage, and eliminates inefficiency such as an unsuccessful attempt to perform the unusable process.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a post-processing apparatus according to an embodiment of the present invention.

FIG. 2 is a hardware block diagram showing a hardware configuration necessary for performing abnormality detection and processing inhibition processing in the post-processing device.

FIG. 3 is a flowchart showing a processing procedure for performing push-type abnormality processing during an initial operation.

FIG. 4 is a flowchart showing a processing procedure for performing an abnormal process of the cutting cutter at an initial operation.

FIG. 5 is a flowchart showing a processing procedure for performing push-type abnormality processing during normal operation.

FIG. 6 is a flowchart showing a processing procedure for performing an abnormal process of the cutting cutter during a normal operation.

FIG. 7 is a flowchart illustrating a processing procedure for performing an abnormality process of a bending roller during a normal operation.

FIG. 8 is a plan view of an operation unit on the image forming apparatus side in a standby state of the machine.

FIG. 9 is a plan view of an operation unit on the image forming apparatus side in a state where saddle stapling is selected.

FIG. 10 is a plan view of an operation unit on the image forming apparatus side in a state where reading of a document is completed.

FIG. 11 is a plan view of an operation unit on the image forming apparatus side in a state where a saddle stitching pattern is set.

FIG. 12 is a plan view of an operation unit on the image forming apparatus side when a press-type abnormality is detected.

FIG. 13 is a plan view of the operation unit on the image forming apparatus side in a state where the machine is restarted when the pressing die is abnormal.

FIG. 14 is a plan view of an operation unit on the image forming apparatus side when a cutting unit abnormality is detected.

FIG. 15 is a plan view of the operation unit on the image forming apparatus side in a state where the machine is restarted when the cutting unit is abnormal.

FIG. 16 is a diagram showing various binding states of paper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Post-processing apparatus 22 ... Intermediate tray 25 ... Cursor 26 ... Paper tray 27 (27a, 27b) ... Spring 28a, 28b ... Stapler 29 ... Pressing die 30 ... Bending roller 31 ... Cutting part 32 ... Discharge part 33 ... Discharge part 50 ... Push-type home sensor 51 ... Bending roller rotation sensor 52 ... Cutting cutter home sensor 53 ... Discharge sensor 54 ... Display unit 55 ... Push-type driving motor 56 ... Cutting cutter driving motor 57 ... Bending roller driving motor 58 ... Saddle stitching key 59 … Binding state display section 62… end binding key

Claims (4)

[Claims] In a sheet post-processing apparatus that performs a binding process on a plurality of stacked and aligned sheets, when an abnormality is found in a part of the binding process, the abnormality is detected. A paper post-processing apparatus characterized in that only processing that needs to go through a process is disabled. 2. The sheet post-processing apparatus according to claim 1, wherein the binding processing includes one or both of saddle binding and edge binding. 3. The sheet post-processing device according to claim 2, wherein the saddle stitching process includes a folding process. 4. The sheet post-processing apparatus according to claim 1, wherein a part or all of the unusable processing is displayed.