JP2005041663A - Image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the breakage of members of an image forming device by effectively detecting binders such as clips or staple needles for binding sheet materials over the whole cross direction of the sheet materials such as documents or recording sheets. <P>SOLUTION: A pair of carrying guides are formed gradually narrower toward the downstream direction of carriage. The width of each of the pair of carrying guides is set to allow one sheet material to pass therethrough and to prohibit the binder from passing therethrough. Thus, the sheet materials bound by the binders such as clips, when fed to a carrying passage, can stay at the pair of carrying guides. Sensors are provided on the downstream sides of the pair of carrying guides for detecting the existence or not of the sheet materials, thereby allowing easy detection of the sheet materials with binders. A plurality of sensors are provided for detecting the dislocation of the carried sheet materials, thereby allowing detection of whether the sheet materials passing through the carrying guides are the sheet materials with binders or not. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to an image forming apparatus including a conveyance path including a pair of conveyance guides.

In recent years, as an application form of an image forming apparatus such as a facsimile apparatus, a printing apparatus, and a copying apparatus, an unused side of a recording sheet that has been used on one side (hereinafter referred to as “backing paper”) that has been subjected to printing processing on only one side. So-called backing paper is widely used for printing. The use of backing paper is very preferable because it promotes resource saving and contributes to the protection of the global environment, and also reduces the consumption of recording paper in the company, leading to cost reduction. However, if the backing paper mistakenly bundled with a binding tool such as a clip or staple needle is set as a recording paper in the paper feed cassette and fed to the recording paper conveyance path, the clip or the like removed during conveyance The binding tool may be mixed into the image forming apparatus, damaging internal members such as the photosensitive drum and the charging device, and possibly damaging the image forming apparatus itself.
In addition, when an original is set on an automatic document feeder provided in a copying machine or the like, there is a case where an original bundled by a binding tool such as a clip or a staple of a staple is set by mistake. In this state, when a document bundled with a binding tool is conveyed, the document may be damaged by the separation device. In addition, the image reading unit, the conveyance roller, the document table (contact glass) and the like provided in the document conveyance path may be damaged by the binding tool.
In order to solve such a problem, as shown in Patent Document 2 and Patent Document 3, a metal sensor for detecting a clip or the like for bundling documents is provided in a conveyance path between separation units from a take-out portion of a document to be conveyed. There are a document feeder and an image forming apparatus. As a result, the presence or absence of a clip or the like is detected, and the above-described problem is prevented beforehand by stopping the document transport operation based on the detection.
On the other hand, in Patent Document 1, by restricting the upper and lower guides on the upstream side of the conveyance roller that conveys the document, the document is guided to the pressure contact portion of the conveyance roller, and the document is not easily caught between the conveyance rollers. A paper feeder intended to prevent occurrence is shown.
Japanese Patent Laid-Open No. 06-311295 Japanese Patent Laid-Open No. 08-113387 JP 2002-221880 A

However, a metal sensor such as a magnetic sensor used in each device disclosed in Patent Document 2 and Patent Document 3 has a problem that a resin clip or the like cannot be detected. Furthermore, in order to detect the binding tool over the entire width of the document, it is necessary to arrange a large number of sensors or to provide a relatively large sensor with a wide detection range, which increases the size of the apparatus and further increases the cost. This is uneconomical.
The paper feeding device disclosed in Patent Document 1 is not restricted so that a binding tool such as a clip or a staple of a staple cannot pass through, and is not considered to solve the above problem.
Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to bind a binding tool such as a clip for binding a sheet material or a staple of a staple over the entire width direction of the sheet material such as a document or recording paper. An image forming apparatus capable of restricting the conveyance of the sheet material and preventing damage to the sheet material and the respective members such as the conveyance roller and the document table by detecting the image effectively and in a simple manner. There is.

In order to achieve the above object, the present invention provides an image forming apparatus provided with a conveyance path including a pair of conveyance guides, wherein the pair of conveyance guides are formed narrower in the conveyance downstream direction, and The image forming apparatus is characterized in that the distance between the pair of conveyance guides is set to a width that allows a single sheet material to pass therethrough and cannot pass a binding tool.
As a result, even if a sheet material such as a document or recording paper bundled by a binding tool such as a clip is sent out to the conveyance path, the sheet material remains in the pair of conveyance guides. As a result, the sheet material is not conveyed to the conveyance path on the downstream side, and therefore, there is no possibility that the binding tool is mixed into the apparatus, and the conveyance rollers on the downstream side, the document table, the recording paper storage unit, etc. There is an effect that breakage of the member is prevented in advance.
In this case, if the pair of conveyance guides are provided in the conveyance path on the upstream side of the separation device that prevents double feeding of the sheet material, before the sheet material with the binding tool is damaged by the separation device. , The conveyance of the sheet material with the binding tool can be stopped.

Further, it is conceivable that the image forming apparatus is further provided with sheet material detecting means for detecting the presence or absence of a sheet material on the downstream side of the pair of conveyance guides.
With this configuration, for example, when a sheet material is detected within a certain period of time, it can be determined that the sheet material has been partially conveyed normally, and when the sheet material is not detected, the binding stopped by the conveyance guide can be determined. Therefore, it is possible to determine the sheet material with a tool, and thus it is possible to easily detect the sheet material with a binding tool.

Further, it is conceivable that a deviation detecting means for detecting a deviation of the sheet material is further provided on the downstream side of the pair of conveyance guides.
Although the sheet material with the binding tool is temporarily stopped by the conveyance guide, it is assumed that the sheet material passes through the conveyance guide by being pushed by the conveyance force of the sheet material conveyance roller. In this case, a larger shift occurs in the width direction of the sheet material than when the sheet material normally passes. Therefore, the deviation detection means is provided so that it is possible to effectively detect whether or not the sheet material that has passed through the conveyance guide is a sheet material with a binding tool by detecting the deviation of the sheet material above a certain level. We decided to provide it.

  Further, the sheet material detection unit or the detection result of the deviation detection unit may be further provided with a conveyance stop unit for stopping the sheet material conveyance operation. Thereby, it can prevent that the sheet | seat material with a binding tool conveys any more, and can prevent damage to a sheet | seat material and mixing of the binding tool in an apparatus by this.

Further, if the sheet material is a recording paper and the transport path is a recording paper transport path for transporting the recording paper from a predetermined recording paper storage section to a predetermined image forming section, the binding that has been removed during the transport is used. The tool does not damage the photosensitive drum or the charging device constituting the image forming unit.
Furthermore, if the sheet material is a document and the transport path is a document transport path for transporting the document from a predetermined document storage unit to a predetermined document reading unit, document breakage, transport rollers and image reading Can be effectively prevented from being damaged.

As described above, according to the present invention, the pair of transport guides are formed so as to narrow toward the downstream direction of transport, and the width of the pair of transport guides is a sheet material such as one document or recording paper. Is set to such a width that the binding material cannot pass, and even if the sheet material bundled by the binding device such as a clip is sent to the conveyance path, the sheet material is As a result, the sheet material does not pass through the downstream conveyance path, and there is no possibility that the binding tool will be mixed inside the apparatus. In the recording paper conveyance path of the image forming apparatus, the photosensitive material on the conveyance downstream side is eliminated. Damage to each member such as the body drum and the fixing device is prevented in advance, and damage to each member such as a transport roller on the downstream side of the transport and a document table is prevented in the document transport path of the automatic document transport device. Play .
In addition, by providing a sensor or the like for detecting the presence or absence of a sheet material on the downstream side of the pair of conveyance guides, for example, when a sheet material is detected within a certain time, If the sheet material can be determined and is not detected, it can be determined that the sheet material has a binding tool stopped by the conveyance guide. Therefore, the sheet material with the binding tool can be easily detected.
Further, a plurality of sensors for detecting, for example, a sheet material are provided on the downstream side of the pair of conveyance guides, and by detecting a deviation of the conveyed sheet material, the sheet material that has passed through the conveyance guide is a document with a binding tool. It is possible to effectively detect whether or not there is.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
FIG. 1 is a schematic sectional view showing a part of the sheet material conveyance path of the image forming apparatus A according to the embodiment of the present invention. FIG. 2 is a sheet material of the image forming apparatus A according to the embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of the image forming apparatus A according to the embodiment of the present invention, and FIG. 3 is a schematic diagram showing the arrangement of the conveyance sensors provided in the conveyance path. The sheet material conveyance path refers to a conveyance path such as a document conveyance path and a recording paper conveyance path used in the image forming apparatus A according to the embodiment of the present invention. The sheet material is a generic term for a document or a recording sheet.

First, a schematic configuration of the image forming apparatus A and the automatic document feeder 10 according to the embodiment of the present invention will be described with reference to FIG. A copying machine is exemplified as the image forming apparatus A, but it may be a scanner apparatus, a FAX apparatus, a printer apparatus, or the like.
The image forming apparatus A has a plurality of recording paper storage units 11 below, a duplex unit 12 disposed above the recording sheet storage unit 11, and an image forming unit 13 including a photosensitive drum, a charging device, a developing device, and the like above the image forming unit A. And a fixing device 14 are provided. A recording paper conveyance path 131a (an example of a sheet material conveyance path) is disposed between the plurality of recording paper storage units 11 and the image forming unit 13.

The recording paper conveyance path 131a constitutes at least the outer side (right side in FIG. 3) of the recording paper conveyance path 131a, and a front surface conveyance guide 103 (FIG. 1) for guiding the recording paper surface; A back side conveying guide 104 (FIG. 1) that forms a pair and constitutes the inner side (right side in FIG. 3) of the recording paper conveyance path 131a, guides the back side of the recording paper, recording paper conveyance rollers 102a and 105a, and a plurality of recordings A pickup roller 111 that takes out the recording paper stored in the paper storage unit 11, a paper feeding roller 112 that feeds and feeds the recording paper taken out by the pickup roller to the downstream side of the recording paper conveyance path 131a, and further records the recording paper. The recording paper transport roller 113 transports downstream of the paper transport path 131a. Further, the front surface conveyance guide 103 is configured, and a door 22 for releasing a gap between the front surface conveyance guide 103 and the rear surface conveyance guide 104 of the recording paper conveyance path 131a to the outside is provided. The surface conveyance guide 103 is configured to be an inner wall of the door 22.
The recording paper stored in the recording paper storage unit 11 is fed and conveyed to the recording paper conveyance path 131 a by the pickup roller 111 and the paper supply roller 112, and further conveyed downstream in the conveyance direction by the conveyance roller 113. Recording paper transport rollers 102a and 105a are provided on the downstream side of the transport roller 113 in the transport direction, and the surface transport guide 103 of the pair of transport guides is disposed on the transport path between the transport roller 102a and the transport roller 105a. Is formed so that the width of the pair of conveyance guides is narrower in the conveyance downstream direction, and the distance between the pair of conveyance guides is set to a width that allows one sheet of recording paper to pass therethrough and a width that prevents a binding tool from passing therethrough. 130 (FIG. 1) is provided. In the transport restricting unit 130, the recording paper (hereinafter referred to as “recording paper with a binding tool”) that has been bundled with a binding tool such as a clip or a staple of a staple is erroneously placed in the recording paper storage unit 11. , When it is supplied to the recording paper transport path 131a and transported in the transport downstream direction P (FIG. 1), the transport of the recording paper is limited, and the image forming unit positioned on the transport downstream side by the binding tool 13 is provided to prevent damage to the photosensitive drum 13 and the fixing device 14. The conveyance restriction unit 130 will be described in detail later.

  An image reading device 15, a document table 16, and an automatic document feeder (hereinafter referred to as “ADF”) 10 are disposed above the image forming unit 13. The ADF 10 is provided with a document transport path 131 b for transporting a document set on the document tray 17 to the image reading device 15 or the document table 16.

The document conveyance path 131b includes at least a front conveyance guide 103 (FIG. 2) for guiding the document surface, a pair with the front conveyance guide 103, and a back conveyance guide 104 (FIG. 2) for guiding the document back surface. The document tray 17 is configured to include a document feed roller 102b that takes out documents from the document tray 17 part by part and sends them to the conveyance path, and a separation roller 105b for preventing document multi-feed (multilayer).
The document placed on the document tray 17 is taken out by the document feed roller 102b, and then conveyed to the document table 16 while the front and back sides of the document are reversed by the separation roller 105b and the plurality of conveyance rollers 20 and the like. On the document table 16, the document is read by the image reading device 15, and then the document is discharged from the discharge port 19 to the document discharge tray 21 by the discharge roller 18. In the document conveyance path 131b between the conveyance roller 102b and the conveyance roller 105b, the surface conveyance guide 103 of the pair of conveyance guides narrows toward the conveyance downstream direction, similarly to the recording paper conveyance path 131a. The conveyance restriction unit 130 (FIG. 1) is formed in such a manner that the gap between the pair of conveyance guides is set to a width that allows a single document to pass therethrough and cannot pass a binding tool. . The transport restricting unit 130 erroneously places a document (hereinafter referred to as a “document with a binding tool”) that has been bundled by a binding tool such as a clip or a staple of a staple on the document tray 17 and records it. When the paper is supplied to the paper conveyance path 131a and conveyed in the conveyance downstream direction P (FIG. 1), the conveyance of the original is restricted, and the conveyance roller 20 and the document table 16 positioned on the conveyance downstream side by the binding tool, etc. It is provided in order to prevent damage.

  A display operation unit (not shown) such as a liquid crystal touch panel is disposed on the upper surface of the image forming apparatus A main body. The user performs various operations such as image reading start operation by the operation of the display operation unit, and recognizes the occurrence and occurrence location by a warning display of a jam (fault) such as a paper jam displayed on the display operation unit. can do.

  Next, the conveyance restriction unit 130 provided in the recording paper conveyance path 131a or the document conveyance path 131b will be described with reference to the schematic diagram of FIG. In the following description, the roller A102 indicates the conveyance roller 102a or the document feeding roller 102b, the conveyance path roller B105 indicates the conveyance roller 105a or the separation roller 105b, and the sheet material conveyance path 131 indicates the recording paper conveyance path. 131a or the document conveyance path 131b is shown.

  FIG. 1 schematically illustrates a configuration in which the conveyance restriction unit 130 is provided in the sheet material conveyance path 131 between the roller A102 and the roller B105. The sheet material conveyance path 131 includes a front-side conveyance guide 103 that guides the surface of the sheet material and a back-side conveyance guide 104 that guides the back surface of the sheet material, and is installed so as to make a pair with a predetermined distance D therebetween. Thus, the sheet material conveyance path 131 is formed. As shown in FIG. 1, the conveyance restriction unit 130 is formed so that a part of the front conveyance guide 103 is inclined toward the conveyance downstream direction, and has the narrowest interval d (d <D) in the sheet material conveyance path 131. Inclined to form. This interval d is an interval (width) through which one sheet material can pass, and an interval (width) through which the binding tool cannot pass, and is formed in the entire width direction. Usually, the thickness of plain paper that is frequently used is about 0.2 mm, and the binding portion when a few sheets of plain paper are bundled with clips, staples, etc. that are usually frequently used as the binding tool 120. Since it has a thickness of several millimeters, it is desirable to form the transport restriction 130 so that the distance d is 0.5 to 1 mm. If at least the distance d is within the above range, it is sufficient for one sheet material to pass through, and the binding-attached sheet material 101 cannot pass through the conveyance limiting portion 130.

Accordingly, by providing the sheet material conveyance path 131 having such a conveyance restriction unit 130 in the recording paper conveyance path 131a, the recording paper with a binding tool composed of a plurality of recording sheets is set in the recording paper storage unit 11, and the pickup is performed. Even if the recording paper with the binding tool is fed to the recording paper transport path 131a by the roller 11 and the paper feed roller 112 and further transported downstream from the transport roller 113, the recording paper with the binding tool is controlled by the transport control. It cannot pass through the section 130. Further, when a normal recording paper without a binding tool is set in the recording paper storage unit 11, the conveyance restriction unit 130 has an interval d that allows a single recording sheet to pass sufficiently. It is conveyed to the downstream conveyance path without interfering with 130. As a result, the recording paper with the binding tool is not transported to the downstream transport path of the recording paper transport path 131a, so that the members such as the photosensitive drum 13a and the fixing device 14 are prevented from being damaged by the binding tool detached during the transport. Will be.
Further, by providing a sheet material conveyance path 131 having such a conveyance restriction unit 130 in the document conveyance path 131b, a document with a binding tool composed of a plurality of documents is set on the document tray 17, and is fed by the document feed roller 102b. Even if the document with a binding tool is sent to the document transport path 131b, the document with a binding tool cannot pass through the transport control unit 130. In addition, when a normal document without a binding tool is set, the conveyance restriction unit 130 has an interval d that allows one document to sufficiently pass therethrough, so that the document is conveyed downstream without being interfered with the conveyance restriction unit 130. It is transported to the road. As a result, the recording paper with the binding tool is not transported to the downstream transport path of the recording paper transport path 131a, so that the members such as the transport roller 20 and the document table 16 are prevented from being damaged by the binding tool detached during transport. Will be. Further, the binding tool 120 can be prevented from entering the image forming apparatus A.

  Next, a configuration in which a conveyance sensor 140 for detecting the presence or absence of the sheet material 101 is provided on the conveyance downstream side of the conveyance restriction unit 130 will be described with reference to FIG. The conveyance sensor 140 is an example of a sheet material detection unit, and for example, a photo sensor or the like is used. The conveyance sensor 140 is usually provided in each part in the image forming apparatus A in order to detect the presence or absence of a sheet material such as a document or recording paper. As shown in FIG. 2A, the effect produced by providing the conveyance sensor 140 on the conveyance downstream side of the conveyance control unit 130 is not only to detect the conveyed sheet material. For example, if the sheet material is detected within a certain time by detecting whether the sheet material is detected within a certain time after the sheet material is fed and conveyed by the roller A102, the sheet material is a normal sheet material. That is, if it is determined that the sheet material 101 is not a binding tool and is not detected within a predetermined time, it can be determined that the sheet material is an abnormal sheet material, that is, the sheet material 101 with a binding tool. Such an effect is exhibited only when the transport sensor 140 is arranged on the downstream side of the transport restriction unit 130. By providing such a configuration, the binding-attached sheet material 101 can be easily detected.

Further, as shown in FIG. 2B, a configuration in which the conveyance sensor 140 is provided at three locations on the conveyance downstream side of the conveyance restriction unit 130 will be described.
The conveyance sensors 140-1 and 140-2 shown in FIG. 2B are arranged on a straight line parallel to the width direction of the sheet material. One of the conveyance sensors is arranged at the center (140-2), and the other two are arranged one by one on both sides of the sheet material at an equal distance from the center sensor 140-2 (140-1). ). By arranging the conveyance sensor 140 on the conveyance downstream side of the conveyance restriction unit 130 in this way, for example, the timing at which the sensor 140-2 detects the sheet material is used as a reference, and two timings provided on both sides. By comparing the timing at which the sensor 140-1 detects the sheet material, it is possible to detect the deviation of the sheet material with respect to the conveyance direction P. Thus, the provision of the three conveyance sensors 140 means that a deviation detection means for detecting a deviation of the sheet material is provided on the conveyance downstream side of the conveyance control unit 130 in the document conveyance path 131. . By providing such misalignment detection sensors 140-1 and 140-2 and detecting misalignment of the sheet material above a certain level, the conveyed sheet material is a normal sheet material or a sheet material with a binding tool. You can judge whether or not. This is also conceivable when the binding-attached sheet material 101 is pushed by the feeding force of the roller A102 and passes through the conveyance restriction unit 130. In such a case, when the binding tool 120 is caught by the conveyance restriction unit 130, the sheet material is largely displaced as compared with the case where the sheet material normally passes. Therefore, it is possible to effectively detect whether or not the sheet material that has passed through the conveyance guide is the sheet material 101 with the binding tool by detecting the deviation of the sheet material that exceeds a certain level. For this purpose, it is desirable to provide the conveyance sensors 140-1 at both ends in the width direction of the sheet material, and to automatically move the conveyance sensors 140-1 to positions suitable for the sheet size of the set sheet material. Is desirable.

As described above, when the conveyance sensor 140 is provided on the conveyance downstream side of the conveyance restriction unit 130, when it is determined that the sheet material is the sheet material 101 with the binding tool, for example, the recording paper from the recording paper storage unit 11 is used. By providing the image forming apparatus A with the function of canceling the sheet feeding operation or the function of canceling the document transport operation by the ADF 10 (an example of the transport canceling unit), the sheet material 101 with the binding tool is transported further. This can prevent the sheet material from being damaged and the binding tool from being mixed into the apparatus.
Further, in the same manner as when a jam (failure) warning such as a paper jam is displayed on a display operation unit (not shown), the indication that the sheet material with the binding tool has stopped at the conveyance restriction unit 130 and its position are displayed. If displayed on the operation unit, the operator can easily recognize that the sheet material with the binding tool has been detected and its position. When the sheet material with a binding tool is a recording paper with a binding tool, the operator refers to the displayed detection position and opens the door 22 that opens the recording paper conveyance path 131a, thereby recording with the binding tool. Paper can be easily removed.
Further, when the sheet material with a binding tool is a document with a binding tool, a function (an example of a reverse direction transport unit) for transporting a document being transported by the ADF 10 in a direction opposite to the transport direction is provided to perform a transport operation by the ADF 10. By controlling, it becomes possible to easily take out the document 101 with the binding tool.

In the embodiment, a part of the front-side transport guide 103 is formed so as to be inclined toward the transport downstream direction, and the narrowest interval d (d) in the sheet material transport path 131 is formed by the front-side transport guide 103 and the back-side transport guide 104. <D) has been described. However, the present invention is not limited to this. However, one of the front-side transport guide 103 and the back-side transport guide 104, or a part of both transport guides is in the downstream transport direction. It may be formed so as to incline as it goes to form the interval d. For example, the distance d may be formed by inclining only the back side conveyance guide, or the distance d may be formed by inclining each of the both conveyance guides.
In the above-described embodiment, the image forming apparatus A is described in which the conveyance restriction unit 130 is provided in the recording paper conveyance path 131a from the recording paper storage unit 11 to the image forming unit 13. The conveyance restriction unit 130 may be provided on the conveyance path from the image forming unit 13 to the image forming unit 13.

FIG. 3 is a schematic cross-sectional view illustrating a part of a sheet material conveyance path of the image forming apparatus according to the present invention. FIG. 3 is a schematic diagram illustrating an arrangement of conveyance sensors provided in a sheet material conveyance path of the image forming apparatus according to the present invention. 1 is a schematic cross-sectional view of an image forming apparatus according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Automatic document feeder 11 ... Recording paper storage part 12 ... Duplex unit 13 ... Image forming part 13a ... Photosensitive drum 14 ... Fixing device 15 ... Image reading device 16 ... Document stand 17 ... Document tray 18 ... Ejection roller 19 ... Ejection roller 19 Exit 20 ... Conveying roller 21 ... Document discharge tray 22 ... Door 101 ... Binding sheet material 102 ... Roller A
102a ... Recording paper conveyance roller 102b ... Document feeding roller 103 ... Front side conveyance guide 104 ... Back side conveyance guide 105 ... Roller B
105a ... Recording paper transport roller 105b ... Original separation roller 111 ... Pickup roller 112 ... Recording paper feed roller 113 ... Recording paper transport roller 120 ... Binding tool 130 ... Conveyance limiting unit 131 ... Sheet material transport path 131a ... Recording paper transport path 131b Document transport path 140 Transport sensor 140-1 Transport sensor 140-2 Transport sensor

Claims (7)

In the image forming apparatus provided with the conveyance path including the pair of conveyance guides, the pair of conveyance guides are formed so as to narrow toward the conveyance downstream direction, and the interval between the pair of conveyance guides is one sheet. An image forming apparatus characterized in that the sheet material is set to a width that allows the sheet material to pass therethrough and a binding tool cannot pass through. The image forming apparatus according to claim 1, wherein the pair of conveyance guides are provided in a conveyance path on an upstream side of a separation device that prevents double feeding of sheet materials. The image forming apparatus according to claim 1, further comprising a sheet material detection unit that detects the presence or absence of the sheet material on a downstream side of the pair of conveyance guides. The image forming apparatus according to claim 1, further comprising a deviation detecting unit that detects a deviation of the sheet material downstream of the pair of conveyance guides. The image forming apparatus according to claim 1, further comprising a conveyance stopping unit that stops a sheet material conveying operation based on a detection result of the sheet material detection unit or the deviation detection unit. 6. The recording sheet conveyance path according to claim 1, wherein the sheet material is a recording sheet, and the conveyance path is a recording sheet conveyance path for conveying the recording sheet from a predetermined recording sheet storage unit to a predetermined image forming unit. Image forming apparatus. 6. The image forming apparatus according to claim 1, wherein the sheet material is a document, and the transport path is a document transport path for transporting the document from a predetermined document storage unit to a predetermined document reading unit. .

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