JP2001296703A - Original conveying controller and original conveying control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an original conveying controller capable of facilitating restoring operation performed when a jamming occurs and improving the original conveying efficiency in the case of original skip-reading processing. SOLUTION: When a jamming detection part 3 detects the occurrence of a jamming in the case of the skip-reading processing in this original conveying controller 1, a jamming mode discrimination part 4 discriminates the mode of the jamming based on signals from respective sensors and transmits a discrimination signal to a counter adjusting part 5. The adjusting part 5 adjusts the counted value (j) of a skip-reading number counter 2 based on the transmitted discrimination signal. For example, when the jammed original is counted by the counter 2 and taken out from an original tray 11 side, '1' is subtracted from the counted value (j) in order to avoid the overlapped skip-reading of the same original.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a copier, a facsimile
The present invention relates to a document transport control device and a document transport control method used when performing a skipping process in a transceiver and a scanner.

[0002]

2. Description of the Related Art Conventionally, when a jam occurs during document transport in a copying machine, a facsimile transceiver, a scanner, or the like, the jammed document is extracted and the cause of the jam is eliminated, and then document transport is resumed. At this time, the user (operator) of the apparatus easily discriminates a document that has not been read (unread document) from a document that has already been read (read document). It is easy to mistakenly determine whether a document has been read), and duplicate reading of a document or omission of reading may occur.

Therefore, in the invention described in Japanese Patent Application Laid-Open No. 60-8836, if a jam occurs during document conveyance, all the documents including the already read documents are set on the document tray again, and all the documents are re-read. Transporting (so-called all-document return) has been proposed. In this method, since the number of read originals is stored by a reading counter or the like, when the originals are transported again, the number of read originals is skipped (that is, only the transport is performed without reading. ), Reading is performed only for the remaining originals.

In the invention described in Japanese Patent Application Laid-Open No. Hei 9-18643, the above-described re-conveyance by returning all originals and conveyance of only unread originals can be used in accordance with the number of read originals. Proposed. in this way,
When the number of read originals is small, reconveyance is performed by returning all originals. When the number of read originals is large, only unread originals are read in order to avoid time loss due to skipping a large amount of originals. Transport is performed.

[0005]

However, in the re-conveyance by returning the entire original as described above, a jam may occur again when the read original is skipped. In particular, a document that has once jammed may be damaged, so that it is easy for jams to occur again.

In such a case, after the jammed document is extracted, the reading of the document is restarted. However, as in the case of reading the document, duplicate reading of the document or omission of reading occurs. There was sometimes. That is, the operator determines that the apparatus has not skipped the document (not counted) (an unread skipped document).
In this case, it is easy to mistakenly distinguish a document that has already been skipped (counted) (ie, a previously skipped document), and the number of skipped pages counted by the apparatus may be shifted.

[0007] Further, if a jam occurs at the time of skipping a document, a method of returning the entire original again and skipping the already read original again from the beginning may be considered. However, as described above, since a document that has once jammed is likely to cause another jam, there is a possibility that the entire document must be returned many times before the unread document is conveyed. The operator will spend a great deal of time and effort.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in consideration of the above-described problems, and has been made in consideration of the above-described circumstances. An object of the present invention is to provide a document conveyance control method.

[0009]

According to a first aspect of the present invention, there is provided a document transport control device for transporting a document sequentially drawn from a document tray to a transport path for performing a skip process. A skip counter that counts the number of originals subjected to the scanning, a jam detection unit that detects that a jam has occurred in the transport path, and a jam mode determination that determines the mode of the jam and outputs a determination signal Means, and a counter adjusting means for adjusting the count number of the skipped-sheet number counter based on the determination signal.

On the other hand, a document conveyance control method according to the present invention
In a document transport control method for transporting a document sequentially pulled out from a document tray to a transport path for performing a skipping process, the number of documents subjected to the skipping process is determined by:
A skipped sheet number counting step for counting using a skipped sheet number counter, a jam detection step for detecting that a jam has occurred in the transport path, and a jam mode determination for determining the mode of the generated jam and outputting a determination signal. And a counter adjusting step of adjusting the count of the skipped number counter based on the determination signal.

According to these inventions, even if a jam occurs during the skipping process, the occurrence mode of the jam is determined, the count of the skipping number counter is adjusted, and the deviation of the skipping number is reduced. It is automatically corrected. Accordingly, it is possible to prevent the occurrence of duplicate skipping of the originals and omission of skipping of the originals, thereby facilitating the recovery operation when a jam occurs during the skipping of the originals, and improving the original conveyance efficiency.

In the document transport control device, the jam mode determining means determines, as a first mode, a mode in which the document in which the jam has occurred is counted by the skipped sheet number counter and extracted from the document tray. When the discrimination signal is the discrimination signal indicating the first mode, the counter adjusting means preferably subtracts 1 from the count of the skipped-sheet number counter.

[0013] In the document transport control device, the jam mode determining means may determine that the document in which the jam has occurred is not counted by the skipped-sheet counter and is extracted from a position other than the document tray side. It is also preferable that the counter adjusting means adds 1 to the count number of the skipped-sheet number counter when the determination signal is the determination signal indicating the second mode.

On the other hand, in the document transport control method, in the jam mode determining step, the document in which the jam has occurred is counted by the skipped sheet number counter, and
The mode extracted from the document tray side is determined as the first mode, and in the counter adjustment step, the determination signal is set to the first mode.
In the case of the discrimination signal indicating the aspect, it is preferable to subtract 1 from the count number of the skipped-sheet-number counter.

In the document transport control method, in the jam mode determining step, the document in which the jam has occurred is not counted by the skipped sheet number counter, and the mode in which the document is extracted from a position other than the document tray is defined as a second mode. In the counter adjustment step, when the determination signal is the determination signal indicating the second mode, it is also preferable to add 1 to the count number of the skipped-sheet number counter.

In general, when an operator removes a jammed original from the original tray side, it is natural and easy for the operator to re-install the original on the original tray (ie, treat it as an unread skipped original). When the jammed document is extracted from a place other than the document tray, it is natural for the operator to move the document to a discharge tray or the like (that is, treat it as a skipped document). This is easy recovery work.

However, even if a document extracted by the operator from the document tray is counted by the skipped-sheet number counter, the apparatus treats the document as a previously skipped document. If the document is treated as an unread document, the same document will be counted twice. Also, even if the original is extracted from a place other than the original tray side by the operator,
If the document is not counted by the skipped-sheet number counter, the apparatus treats the document as an unread skipped document, and if the operator treats the document as a read skipped document, the document is not counted. Would. In such a case, a shift occurs in the number of skipped pages.

For this reason, when a document in which a jam has occurred is counted by the skipped-sheet number counter and is extracted from the document tray, 1 is subtracted from the counted number of the skipped-sheet number counter, and a jam occurs. If a document is not counted by the skipped number counter and is extracted from a place other than the document tray side, adding 1 to the count of the skipped number counter does not force the operator to easily perform an error-prone operation. It is possible to correct the deviation of the skipped number.

In the document feed control device, the jam mode determining means may be configured such that the jam is caused by double feeding of two documents, and the two documents are counted by one in the skipped-sheet number counter. And the state extracted from other than the document tray side is the third state.
It is also preferable that the counter adjustment means adds 1 to the count of the skipped-sheet number counter when the determination signal is the determination signal indicating the third mode.

In this document transport control method, in the above-described jam type determining step, the jam is caused by double feeding of two documents, and the two documents are counted by one in the skipped-sheet number counter. Is determined as the third mode, and the counter adjustment step is performed when the determination signal is a determination signal indicating the third mode. It is also preferable to add 1 to the count number of the skipped number counter.

In this way, even if a jam due to two originals (so-called double feed jam) occurs, if the count is adjusted in the same manner as in the above case, the operator is forced to perform an operation that easily causes an error. Without this, it is possible to correct the deviation of the skipped number.

Preferably, the document transport control device further includes a display unit for displaying a message indicating a method of extracting the original having the jam or a method of re-installing the extracted original.

Further, in the document transport control device provided with the display means, the skip count counter detects that the count adjusted by the counter adjusting means exceeds a preset number of skips. More preferably, an excess number signal indicating the excess number is output, and the display means displays a message indicating that the excess number of originals are to be re-installed on the original tray based on the excess number signal.

It is preferable that the document transport control method further includes a display step of displaying a message indicating a method of extracting the original having the jam or a method of re-installing the extracted original.

Further, in the document transport control device having a display step, when it is detected that the count number of the skipped-sheet number counter adjusted by the counter adjusting means exceeds a preset number of skipped sheets, the excess sheet number is detected. An excess number signal output step of outputting an excess number signal indicating that the number of originals is more than one is displayed on the document tray based on the excess number signal. preferable.

By displaying the document extracting method or the document re-installing method in this way, it is possible to prevent an erroneous operation by the operator beforehand and to more effectively prevent a deviation in the number of skipped pages.

Further, by adjusting the count number of the skipped-sheet number counter, the count number may exceed the preset number of sheets to be skipped. Displaying a message indicating re-reading makes it possible to prevent a document or the like to be read from being erroneously skipped.

[0028]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of a document conveyance control device and a document conveyance control method according to the present invention will be described in detail. In the description of the drawings, the same or corresponding elements will be denoted by the same reference characters, without redundant description. Also, in the embodiment, a case where the document transport control device and the document transport control method according to the present invention are applied to a copying machine will be described.

First, the configuration of the document transport control device according to the present embodiment will be described with reference to functional block diagrams and schematic diagrams of main parts shown in FIG. 1 and FIG. As shown in FIG. 1, the document transport control device 1 includes a skipped sheet number counter 2, a jam detection unit 3, a jam mode determination unit 4, a counter adjustment unit 5, and a display unit 6. You. As shown in FIG. 2, a copy machine to which the document transport control device 1 is applied includes a document tray 11, a cover 12, a pickup roll 13, a document separation roll 14, a pre-registration roll 15, a document installation sensor 21, a cover open / close sensor 22, a document separation sensor 23, a pickup sensor 24, a first pre-registration sensor 25, a document size sensor 26, a second pre-registration sensor, and a reading unit (not shown).

The skip counter 2 receives the signal from the pickup sensor 24 and can sequentially add a count j indicating the number of skipped originals, and controls the counter adjusting unit 5. Accordingly, the count number j can be adjusted. Further, a memory (not shown) for storing the number k to be skipped is provided, and when the count number j exceeds the number k to be skipped, an excess number signal indicating the excess number is displayed on the display unit 6. It is possible to transmit and display a message to return the excess number of documents to the document tray.

The jam detecting section 3 includes the pickup sensor 2
4. It is possible to detect the occurrence of a document jam by receiving a signal from the first pre-registration sensor 25, the document size sensor 26, or the second pre-registration sensor. When a document jam is detected, a signal indicating the occurrence of a jam is transmitted to the jam mode determination unit 4.

After receiving the signal indicating the occurrence of the jam transmitted from the jam detecting unit 3, the jam mode determining unit 4 determines the jam based on the signal transmitted from the cover open / close sensor 22, the document separation sensor 23 or the document size sensor 26. It is possible to determine the mode of the jam. After the mode of the jam is determined, a determination signal indicating the mode is transmitted to the counter adjustment unit 5. Further, according to the type of jam, it is possible to cause the display unit 6 to display a message indicating a method of extracting a jammed document or a method of re-installing the extracted document.

The counter adjusting section 5 includes a memory (not shown) for storing data for calculating the count number j, and receives a signal indicating the mode of the jam transmitted from the jam mode determining section 4. Thus, by performing the calculation based on the mode, the count number j of the skipped-sheet number counter 2 can be adjusted.

Under the control of the skipped-sheet number counter 2, the display unit 6 can display a message indicating that an excess number of originals should be returned to the original tray. Further, under the control of the jam mode determining unit 4, it is possible to display a message indicating a method of extracting a jammed document or a method of re-installing the extracted document. As the display section 6, for example, a liquid crystal display or the like is used.

Next, referring to FIG. 2, specific operations of a reading process and a reading skipping process by a copying machine to which the document transport control device according to the present embodiment is applied will be described.

First, the original P placed on the original tray 11 is pulled out by the pickup roll 13 to the original carrying-in section (the lower part of the pickup roll 13 in the figure). The pulled-out document P is pulled into the transport path one by one by the document separation roll 14. Then, the paper is sent by a pre-registration roll 15 or the like in the direction of the dashed arrow in the figure, and is conveyed to a reading unit (not shown). Thereafter, in the case of the reading process, the reading process is performed on the conveyed document P in the reading unit. On the other hand, in the case of the skipping process, the conveyed document P passes through the reading unit without performing the reading process. The pickup sensor 24 installed on the transport path is a sensor for detecting that the document P has passed through the transport path, and the document size sensor 26 is a sensor for detecting the size of the document P that has passed. It is.

Next, the operation (document conveyance control method) of the document conveyance control device according to the present embodiment will be described with reference to the flowchart shown in FIG. In this embodiment,
It is assumed that the document of the (k + 1) th sheet is jammed (not read) during the reading process of the document, and the entire document is returned. That is, the skipping process in the case where the first to kth documents are skipped and the (k + 1) th and subsequent documents are read again will be described.

Before the skipping process is performed, the number k to be skipped is set in a memory (not shown) of the skipping number counter 2 in advance (step 11, hereinafter S1).
Abbreviated as 1). The count j of the skipped-sheet number counter 2 is also set to 0 in advance.

After the setting of the skipped-sheet number counter 2 is performed, the documents placed on the document tray 11 are drawn one by one into the transport path, and the skipping process is executed (S13). At this time, the pickup sensor 24 that senses that the document has passed through the transport path transmits a signal to the skipped-sheet number counter 2. In the skipped sheet number counter 2 receiving this signal, 1 is added to the count number j.

When the skipping process is performed on each document, the jam detecting unit 3 detects the pick-up sensor 2
4. It is determined whether a document jam has occurred based on a signal transmitted from the first pre-registration sensor 25, the document size sensor 26, or the second pre-registration sensor (S15).
The determination of the occurrence of the document jam is made by storing in advance the sensor detection time (normal detection time) of each sensor in the normal state in the jam detection unit 3 and determining whether the length of the signal transmitted from each sensor is normal. This is performed based on whether it is within the time or exceeds the normal sensing time. That is, when the signal transmitted from each sensor exceeds the normal sensing time,
The document may be stagnant in the transport path due to some abnormality, and it is determined that a jam has occurred.

The determination of the occurrence of a document jam is also made on whether or not the data regarding the document size transmitted from the document size sensor 26 is the same as the actual size of the document. That is, if the document size detected by the document size sensor 26 is larger than the size of the actual document P, there is a possibility that two documents have been pulled in at the same time. Is determined.

In S15, when it is determined that no jam has occurred, the count number j is compared with the number k of sheets to be skipped (S17). Is completed, and the skipping process ends. If j <k, an unread skipped document remains, and the process returns to S13 to execute the skipping process of the next document.

On the other hand, if it is determined in S15 that a jam has occurred, the jam type determining unit 4 receives the signal indicating the occurrence of the jam transmitted from the jam detecting unit 3 and determines the type of the jam. In the determination of the jam mode, based on the data regarding the document size transmitted from the document size sensor 26, the jam is caused by one document (single jam) or by two documents (double feed jam). Is determined (S19). Further, when the jam is a single jam, a cover opening / closing sensor (a sensor that detects opening / closing of the cover 12) 22 and a document separation sensor (a sensor that detects that a document has passed the front side of the document separation roll 14). 23 and pickup sensor 2
Based on the signal transmitted from No. 4, it is determined in what manner the jam is caused (S21).

In other words, after the original jam is detected by the pickup sensor 24 (ie, the pickup sensor 24 is turned on), the original jam is detected.
If the pickup sensor 24 (and the document separation sensor 23) is turned off while the cover opening / closing sensor 22 is not detected by the cover opening / closing sensor 22, the document in which the jam has occurred is counted by the skipped sheet number counter 2, In addition, it is determined that the document is extracted from the document tray 11 side (hereinafter, referred to as a first mode). In the case of the first embodiment, the extracted document is placed on the document tray 1.
It is a natural and easy recovery operation for the operator to re-install the original at 1 (that is, treat it as an unread skipped original), but if the processing is resumed as it is, the same original will be counted twice. I will. Therefore, the counter adjustment unit 5 that has received the determination signal indicating the first mode from the jam mode determination unit 4 performs an adjustment of subtracting 1 from the count number j of the skipped page number counter 2 (S2).
3).

In the case of a single jam, the original that caused the jam is not detected by the pickup sensor 24,
If the opening / closing of the cover 12 is detected by the cover opening / closing sensor 22, the document in which the jam has occurred is not counted by the skipped sheet number counter 2 and is extracted from the upper portion of the apparatus (other than the document tray 11 side). (Hereinafter, referred to as a second mode). This second
In the case of the mode (1), moving the extracted document to a discharge tray or the like (not shown) (that is, treating the read document as a skipped document) is a natural and easy recovery operation for the operator. Resumes, the original is not counted. Therefore, the counter adjustment unit 5 that has received the determination signal indicating the second mode from the jam mode determination unit 4 performs adjustment by adding 1 to the count number j of the skipped page number counter 2 (S25).

In the case of a single jam and neither of the first mode nor the second mode (for example, a document in which a jam has occurred is not counted by the skipped sheet number counter 2 and the document tray 11 side Etc.)
In this case, since there is no deviation between the count number j of the skipped-sheet number counter 2 and the actual skipped number, the count number j of the skipped-sheet number counter 2 is not adjusted.

On the other hand, in the case of a multi-feed jam (hereinafter referred to as a third jam).
), The two originals in which the jam has occurred are counted as one by the skipped-sheet number counter 2, and
In addition, if these originals are extracted from a position other than the original tray 11, two originals are counted as one. Therefore, in this case as well, it is necessary to prevent a deviation from occurring between the count number j of the skipped-sheet number counter 2 and the actual skipped sheet number. Upon receiving the determination signal, the counter adjustment unit 5 performs adjustment to add 1 to the count number j of the skipped-sheet number counter 2 (S2).
7).

Further, in accordance with the adjustment of the count number j as described above, the display unit 6 receives the signal (discrimination signal) indicating the jam mode transmitted from the jam mode determining unit 4,
A display indicating a method of extracting the original or a method of re-installing the extracted original is performed. For example, in the first embodiment and the like,
When the jammed document is extracted from the document tray 11, a message such as "Please set the document again on the document tray" is displayed.

After the jam recovery process is performed as described above, the skip count 2 compares the count number j with the number k to be skipped (S2).
9). Here, when the count number j is equal to the number k to be skipped (when j = k), it means that the skipping processing of the document to be skipped has just been completed.
The skipping process ends as it is.

In step S29, if the count j is larger than the number k to be skipped (ie, if the count k is exceeded by the adjustment of the count j), the original (not to be skipped) is read. In other words, a state is assumed in which it is considered that even the (k + 1th and subsequent originals) have been skipped. For this reason, the display unit 6 which has received the signal indicating the excess number from the skipped number counter 2 displays a message to return the document corresponding to the excess number (S31). For example, if the count number j is larger than the number k of sheets to be skipped by one (that is, if the document is skipped to the (k + 1) th document), "Please return one document to the document tray." Is displayed. When the original is returned by this display, the skipping process has just been completed, and the skipping process ends.

If the count j is smaller than the number k to be skipped in S29, the number k to be skipped and the count j are reset to restart the skipping process of the remaining documents. (S33). Here, the skipping process after restart is considered as a new skipping process, and the number of sheets to be skipped (i.e., the remaining number of skipping processes) is replaced by kj, and the new count is replaced by 0. Then, after this replacement is performed, S13
Then, the skipping process is resumed, and the process is repeated until the skipping process of all the documents to be skipped is completed.

In this embodiment, the skip processing is performed as described above. After the skipping process is completed (that is, after the skipping process of the k-th document is completed), the reading process of the (k + 1) th and subsequent documents is performed. Therefore, according to the document transport control device and the document transport control method according to the present embodiment, it is possible to prevent the double skipping of the document or the omission of the skipping of the document, thereby facilitating the recovery operation when the jam occurs during the document skipping. At the same time, the document transport efficiency can be improved.

The document transport control device and the document transport control method according to the present invention are not limited to the modes described in the above embodiment, but may take various modifications in accordance with other conditions. It is possible. For example, the image processing apparatus further includes a storage unit that stores the number of the original document in which a jam has occurred once. May be reduced. As described above, a document in which a jam has occurred once is likely to cause a jam again, so that it is possible to prevent the jam from occurring again.

The number of times the original is returned for the same print job before applying the present invention is determined.
Alternatively, the apparatus may further include a determination unit for determining what kind of jam occurs when the present invention is applied. In this way, a more advantageous method can be selected from the whole document return and the count adjustment processing according to the present invention according to the jam situation and the like.

In the above embodiment, the case where the document transport control device and the document transport control method according to the present invention are applied to a copying machine has been described. It can also be applied to other devices involving.

[0056]

As described above, according to the document transport control device and the document transport control method according to the present invention, it is possible to prevent the occurrence of skipping of duplicate reading or skipping of reading of a document. In this case, the recovery operation at the time of occurrence of a paper jam can be facilitated, and the document conveyance efficiency can be improved.

That is, when a document having a jam is counted by the skipped-sheet number counter and extracted from the document tray, 1 is subtracted from the counted number of the skipped-sheet counter, and the document having the jam is removed. If the count is not counted by the skipped-sheet counter and the sheet is picked up from a position other than the document tray, 1 is added to the counted number of the skipped-sheet counter so that the operator is not forced to perform an error-prone operation. It is possible to correct the deviation of the skipped number.

Even when a jam due to two originals (so-called double feed jam) occurs, by adjusting the count number in the same manner as in the above case, the operator is not forced to perform an operation that is likely to cause an error. It is possible to correct the deviation of the skipped number.

Further, by displaying the method of extracting the original or the method of re-installing the original, it is possible to prevent an erroneous operation by the operator beforehand and to more effectively prevent a deviation in the number of skipped pages.

Further, even when the counted number exceeds the preset number of sheets to be skipped, the reading process is performed by displaying a message indicating that the excess number of originals is to be placed on the original tray. It is possible to prevent a wrong original or the like from being erroneously read.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a main part of a document conveyance control device according to an embodiment.

FIG. 2 is a schematic diagram illustrating a hardware configuration of a main part of a copying machine to which the document conveyance control device according to the embodiment is applied.

FIG. 3 is a flowchart illustrating an operation (document conveyance control method) of the document conveyance control device according to the embodiment.

[Explanation of symbols]

1. Document transport controller 2. Skipped sheet counter
Reference numeral 3 denotes a jam detection unit, 4 denotes a jam mode determination unit, 5 denotes a counter adjustment unit, 6 denotes a display unit, 11 denotes a document tray, 12 denotes a cover, 13 denotes a pickup roll, 14 denotes a document separation roll, and 15 denotes a pre-registration roll. … Original sensor, 2
2: Cover open / close sensor, 23: Document separation sensor, 24:
Pickup sensor, 25 ... first pre-registration sensor, 26
... Document size sensor, 27 ... Second pre-registration sensor, P ...
Manuscript

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2H027 DB07 ED12 EK14 FA22 GB08 GB09 2H076 BA61 BA72 BA76 3F048 AA01 AB02 BA13 BA14 BB02 BC03 BC04 BD08 CA05 CC01 DA06 DB03 DB07 DC12 EA03 EA08 EA12 EB23 EB24 5C062 AA02 AA02 AC69 9A001 BB02 BB04 CZ02 DD07 JJ12 JJ35 KK29 KK37 KK42 LL02 LL05

Claims (12)

[Claims] An original transport control device for transporting originals sequentially pulled out from an original tray to a transport path for performing a skipping process. A skipped-sheet counter for counting the number of documents subjected to the skipping process. Jam detection means for detecting that a jam has occurred in the transport path; jam mode determination means for determining a mode of the jam that has occurred and outputting a determination signal; and the number of skipped pages based on the determination signal. A document transport control device comprising: a counter adjusting means for adjusting a count number of a counter. 2. The apparatus according to claim 1, wherein the jam mode determining unit determines, as a first mode, a mode in which the document in which the jam has occurred is counted by the skipped-sheet number counter and the document is extracted from the document tray. 2. The document conveyance control device according to claim 1, wherein when the determination signal is the determination signal indicating the first mode, the adjusting unit subtracts 1 from the count number of the skipped-sheet number counter. . 3. The jam mode determining means determines, as a second mode, a mode in which the document in which the jam has occurred is not counted by the skipped-sheet number counter, and a mode in which the document is extracted from a position other than the document tray. 3. The counter according to claim 1, wherein the counter adjustment unit adds 1 to the count of the skipped-sheet number counter when the determination signal is the determination signal indicating the second mode. Document transport control device. 4. The jam mode determining means, wherein the jam is caused by the double feeding of two documents, and the two documents are counted by one at the skipped sheet number counter.
The counter is determined to be a third sheet, and a state extracted from a side other than the document tray side is determined as a third mode. The counter adjusting unit determines that the determination signal is a determination signal indicating the third mode. 4. The document transport control device according to claim 1, wherein 1 is added to the count of the skipped-sheet number counter. 5. A method for extracting a document in which the jam has occurred,
5. The document transport control device according to claim 1, further comprising a display unit configured to display a message indicating a method of re-installing the extracted document. 6. 6. The skipped-sheet number counter detects that the count adjusted by the counter adjusting means exceeds a preset number of sheets to be skipped, and outputs an excess-sheet number signal indicating the excess number. 6. The document transport control device according to claim 5, wherein the display unit displays a message indicating that the document of the excess number is to be re-installed in the document tray based on the excess number signal. 7. A document transport control method for transporting a document sequentially pulled out from a document tray to a transport path for performing a skipping process, comprising the steps of: A step of counting the number of skipped pages that is counted by using the same; a jam detection step of detecting that a jam has occurred in the transport path; a jam mode determining step of determining a mode of the jam that has occurred and outputting a determination signal; A counter adjusting step of adjusting a count number of the skipped-sheet number counter based on a determination signal. 8. In the jam mode determining step, the mode in which the document in which the jam has occurred is counted by the skipped number counter and the mode in which the document is extracted from the document tray side is determined as a first mode. 8. The method according to claim 7, wherein in the adjusting step, when the determination signal is the determination signal indicating the first mode, 1 is subtracted from the count number of the skipped-sheet number counter. . 9. In the jam mode determining step, a mode in which the document in which the jam has occurred is not counted by the skipped sheet number counter, and the mode in which the document is extracted from a position other than the document tray side is determined as a second mode. 9. The counter according to claim 7, wherein in the counter adjustment step, when the determination signal is the determination signal indicating the second mode, 1 is added to the count number of the skipped-sheet number counter. Document transport control method. 10. In the jam mode determining step, the jam is caused by double feeding of two documents, and the two documents are counted as one in the skipped-sheet number counter, and In the counter adjustment step, if the discrimination signal is a discrimination signal indicating the third mode, the number of skipped pages is determined. 10. The document conveyance control method according to claim 7, wherein 1 is added to the count number of the counter. 11. The method according to claim 7, further comprising a display step of displaying a message indicating a method of extracting the original in which the jam has occurred or a method of re-installing the extracted original. Document conveyance control method described above. 12. Detecting that the counted number of the skipped number counter adjusted by the counter adjusting means exceeds a preset number of skipped numbers, and outputs an excess number signal indicating the excess number. 12. The method according to claim 11, further comprising an excess number signal output step, wherein in the displaying step, based on the excess number signal, a message indicating that the excess number of originals is to be re-installed in the original tray is displayed. Document conveyance control method described above.