JP2013012794A - Image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply prevent an original set on an original transporting unit from falling or the like by inhibiting such a situation that an image reading unit openably and closably attached onto an image forming unit and the original transporting unit openably and closably attached onto the image reading unit are opened together, by appropriately controlling the opening and closing of the image reading unit and the original transporting unit.SOLUTION: An image forming apparatus includes: an image forming unit 10 to form an image on a recording sheet S; an image reading unit 20 which is openably and closably attached onto the image forming unit, and reads an image of an original; and an original transporting unit 30 which is openably and closably attached onto the image reading unit, and transports the original to a first original reading section of the image reading unit. The image forming apparatus includes locking means 50 and 60 which inhibit the opening of at least one of the image reading unit and the original transporting unit on the basis of a stop position of a scanner 23 that moves in the image reading unit.

Description

  The present invention relates to an image forming apparatus such as a copying machine, a facsimile machine, and a multifunction machine of these. In particular, an image forming unit that forms an image on a recording sheet, an image reading unit that can be opened and closed on the image forming unit to read an image of a document, and an image reading unit that can be opened and closed on the image reading unit. In an image forming apparatus including a document transport unit that transports a document to a first document reading unit of an image reading unit, the image reading unit and the document transport unit are appropriately controlled to open and close the image reading unit and the document transport unit. Are prohibited from being opened together, and when a document is set on the document transport unit, it is possible to easily prevent the document set on the document transport unit from dropping. It is what has.

  In an image forming apparatus such as a copying machine, a facsimile, or a multifunction machine of these, an image reading unit that reads an image of an original is mounted on an image forming unit that forms an image on a recording sheet so that the image can be opened and closed. A unit on which a document transport unit for transporting a document to the first document reading unit of the image reading unit is mounted so as to be openable and closable is used.

  In such an image forming apparatus, the image reading unit and the document transport unit are opened to perform jam processing, maintenance, and the like in the image forming apparatus.

  Here, when the image reading unit is opened on the image forming unit and the document transport unit is further opened on the image reading unit, the document transport unit is largely opened with respect to the image forming unit. In particular, when the image reading unit and the document conveyance unit are opened and closed in the same direction, the document conveyance unit is opened with a large inclination with respect to the image forming unit, and a document is set on the document conveyance unit. There is a problem that the set document drops from the document transport unit, the document transport unit that is opened with a large inclination hits a person or an object, and is damaged by a small image forming apparatus. It was.

  Conventionally, in Patent Document 1, when a document is present in the document transport unit, the document transport unit is locked by a lock mechanism to prevent the document transport unit from being opened. Has been proposed.

  However, the apparatus disclosed in Patent Document 1 prevents the document transport unit from being opened on the image reading unit while the image reading unit is opened on the image forming unit. The above problems cannot be solved.

  In Patent Document 2, the document transport unit cannot be opened when the image reading unit is opened. However, in Patent Documents 3 and 4, the image reading unit is opened on the image forming unit. It has been proposed that the document conveying unit cannot be opened in the state and the image reading unit cannot be opened in the state where the document conveying unit is opened.

  In these Patent Documents 2 to 4, it is possible to prevent both the image reading unit and the document conveying unit from being opened, but if necessary, the image reading unit and the document can be prevented. It was not possible to properly control both the opening and closing of the transport unit.

JP 2007-180788 A JP 2007-65066 A JP 2006-4003 A JP 2009-1111728 A

  According to the present invention, an image reading unit for reading an image of a document is detachably mounted on an image forming unit for forming an image on a recording sheet, and the document is placed on the image reading unit. It is an object of the present invention to solve the above-described problems in an image forming apparatus in which a document transport unit transported to one document reading unit is mounted so as to be freely opened and closed.

  That is, according to the present invention, in the image forming apparatus as described above, the opening and closing of the image reading unit and the document conveying unit is appropriately controlled to prohibit the image reading unit and the document conveying unit from being opened together. Thus, it is an object of the present invention to easily prevent a document set on the document transport unit from dropping when a document is set on the document transport unit.

  In the first image forming apparatus of the present invention, in order to solve the above-described problem, an image forming unit for forming an image on a recording sheet and an openable / closable image reading unit mounted on the image forming unit are read. An image forming apparatus comprising: an image reading unit; and a document conveying unit that is mounted on the image reading unit so as to be freely opened and closed and conveys a document to a first document reading unit of the image reading unit. In accordance with the stop position of the scanner that moves in step 1, a lock means is provided for prohibiting the opening of at least one of the image reading unit and the document conveying unit.

  As described above, if the locking unit prohibits the opening of at least one of the image reading unit and the document conveying unit based on the stop position of the scanner moving in the image reading unit, the scanner is moved to an appropriate position. This makes it possible to appropriately control the opening and closing of the image reading unit and the document conveying unit, and appropriately preventing the image reading unit and the document conveying unit from being opened together. When the image reading unit and the document transport unit are opened and closed in the same direction, it is possible to prevent the document transport unit from being greatly inclined with respect to the image forming unit.

  The image forming apparatus includes a document detection unit that detects that a document is set on the document transport unit. When the document detection unit detects that a document is set, Is moved to the first document reading operation position for reading the document conveyed to the first document reading unit by the document conveying unit, and at least one of the image reading unit and the document conveying unit is prohibited from being opened by the lock unit. You can make it.

  Further, the image forming apparatus includes a first lock unit that prohibits the opening of the image reading unit and a second lock unit that prohibits the opening of the document transport unit, and the image reading unit, the document transport unit, and the like. It is possible to control the opening and closing of each individually.

  The image forming apparatus includes a first detection unit that detects opening / closing of the image reading unit and a second detection unit that detects opening / closing of the document conveyance unit, and the first detection unit and the second detection unit described above. Based on the detection result by the means, the scanner may be moved to a predetermined position to prohibit the opening of at least one of the image reading unit and the document conveying unit.

  In addition, with the image forming apparatus powered off, the image reading unit and the document conveying unit are opened, the image forming apparatus falls down, or the opened image reading unit and the document conveying unit are When the power of the image forming apparatus is turned off, the scanner moves to a predetermined position and prevents both the document conveying unit and the image reading unit from being locked by the locking means. It is preferable that the opening is prohibited.

  In the second image forming apparatus of the present invention, in order to solve the above-described problem, an image forming unit for forming an image on a recording sheet and an openable and closable image mounted on the image forming unit to form an original image. In an image forming apparatus including a document transport unit that transports to a first document reading unit of a reading unit, a first detection unit that detects opening and closing of the image reading unit, and a second detection unit that detects opening and closing of the document transport unit When the opening of the image reading unit or the document conveying unit is detected in the first detecting means or the second detecting means, the locking means prohibits the opening of the other document conveying unit or the image reading unit. It was to so.

  As in the first image forming apparatus of the present invention, based on the stop position of the scanner that moves in the image reading unit, the locking means prohibits the opening of at least one of the image reading unit and the document conveying unit. By moving the scanner to an appropriate position and stopping it, the opening and closing of the image reading unit and the document conveying unit can be controlled appropriately, and the image reading unit and the document conveying unit can be opened together. In particular, when the image reading unit and the document conveying unit are opened and closed in the same direction, it is possible to prevent the document conveying unit from being greatly inclined and opened with respect to the image forming unit. Become so.

  Further, as in the second image forming apparatus of the present invention, a first detection unit that detects opening and closing of the image reading unit and a second detection unit that detects opening and closing of the document transport unit are provided, and the first detection unit or When the second detection unit detects the opening of the image reading unit or the document conveying unit, the image reading unit is also used when the other document conveying unit or the image reading unit is prohibited from being opened by the locking unit. It is possible to appropriately prevent the document transport unit from being opened together, and particularly when the image reading unit and the document transport unit are opened and closed in the same direction, It is possible to prevent the transport unit from being greatly inclined and opened.

  As a result, in the first and second image forming apparatuses of the present invention, the image reading unit and the document conveying unit are prevented from being opened together, and in particular, the image reading unit and the document conveying unit are in the same direction. When the document transport unit is opened and closed, the document transport unit is opened with a large inclination. When the document is set in the document transport unit, the set document is dropped from the document transport unit, or the document transport unit is opened with a large tilt. It is possible to prevent the unit from being damaged by hitting a person or an object or falling down in the case of a small image forming apparatus.

1 is a schematic explanatory diagram illustrating a state in which an image forming apparatus according to an embodiment of the present invention is used. In the image forming apparatus according to the above-described embodiment, the image reading unit mounted on the image forming unit so as to be freely opened and closed is locked by the first lock unit, and the document transporting mounted on the image reading unit so as to be freely opened and closed It is the schematic side view which showed the state which locked the unit by the 2nd locking means. 4 is a schematic partial explanatory diagram showing a home position where a scanner stops, a first document reading position, and a standby position in the image forming apparatus according to the first embodiment. FIG. In the image forming apparatus according to the second embodiment, a schematic portion showing a home position where the scanner stops, a first document reading position, a standby position, and an intermediate position between the first document reading position and the standby position. It is explanatory drawing. In the image forming apparatus according to the second embodiment, it is a schematic partial explanatory view showing the state of the first lock means and the second lock means when the scanner is at the home position. FIG. 10 is a schematic partial explanatory view showing the state of the first lock unit and the second lock unit when the scanner is in the first document reading position in the image forming apparatus according to the second embodiment. In the image forming apparatus according to the second embodiment, a schematic partial explanatory view showing the states of the first lock means and the second lock means when the scanner is at an intermediate position between the first document reading position and the standby position. It is. In the image forming apparatus according to the second embodiment, it is a schematic partial explanatory view showing the state of the first lock means and the second lock means when the scanner is in a standby position. 10 is a flowchart illustrating an operation of controlling the opening and closing of the image reading unit and the document transport unit by moving the scanner and controlling the opening and closing of the image reading unit and the second locking unit in the image forming apparatus according to the second embodiment.

  Next, an image forming apparatus according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. Note that the image forming apparatus according to the present invention is not limited to those shown in the following embodiments, and can be implemented with appropriate modifications within a range not changing the gist thereof.

  In the image forming apparatus according to this embodiment, as shown in FIG. 1, an image reading unit 20 that reads an image of a document is provided on an image forming unit 10 that forms an image on a recording sheet S so as to be openable and closable. On the image reading unit 20, a document transport unit 30 for transporting a document (not shown) to the first document reading unit 21 in the image reading unit 20 is provided so as to be openable and closable.

  In the image forming unit 10 in this embodiment, the photosensitive member 12a, the charging device 12b for charging the surface of the photosensitive member 12a, and the surface of the charged photosensitive member 12a are read by the image reading unit 20. A latent image forming device 12c that forms an electrostatic latent image by performing exposure based on image information corresponding to the image of the original, and the like, and supplies toner to the electrostatic latent image formed on the surface of the photoreceptor 12a. The four imaging cartridges 11A to 11D equipped with the developing device 12d and the like for forming the image are mounted.

  Here, each developing device 12d in each of the imaging cartridges 11A to 11D contains toners of different colors of black, yellow, magenta, and cyan, and each photoconductor in each of the imaging cartridges 11A to 11D. A toner image of each color is formed on the surface 12a.

  Then, the toner images of the respective colors formed on the surfaces of the respective photoreceptors 12a in the respective imaging cartridges 11A to 11D are sequentially transferred to the intermediate transfer belt 13 that is rotationally driven. A full-color toner image is formed on the substrate.

  Next, the full color toner image formed on the intermediate transfer belt 13 as described above is guided to the position of the transfer roller 14, while the recording sheet S is fed by the paper feed roller 15, and this recording sheet is fed by the timing roller 16. S is guided between the intermediate transfer belt 13 and the transfer roller 14 at an appropriate timing, and a full-color toner image formed on the intermediate transfer belt 13 is transferred onto the recording sheet S.

  Then, the recording sheet S to which the full color toner image is transferred in this way is guided to the fixing device 17, and after fixing the full color toner image on the recording sheet S, the recording sheet S is discharged. Yes.

  In the image reading unit 20, a first document reading unit 21 that reads an image of a document conveyed by the document conveyance unit 30 and a second document reading unit 22 that reads a set document are provided on the upper surface of the image reading unit 20. And a scanner 23 that moves from the home position over the first document reading unit 21 and the second document reading unit 22.

  The scanner 23 is guided to the first document reading unit 21, and the document guided to the first document reading unit 21 by the document transport unit 30 is irradiated with light from the scanner 23, so that the first document reading unit The scanner 23 is moved along the second document reading unit 22 while reading an image on the document guided to 21 and irradiating the document set on the second document reading unit 22 with light from the scanner 23. The image on the original set on the second original reading unit 22 is read.

  In the document transport unit 30, a document set on the document tray 31 is fed and transported by various rollers 32 such as a pickup roller and a feed roller, and the document is transported to the first document reading unit 21. Then, after the image on the original is read as described above, it is discharged.

  In the image forming apparatus according to this embodiment, as shown in FIG. 2, the image reading unit 20 can be opened and closed on the image forming unit 10 by the first opening and closing member 41 such as a hinge. At the same time, the document conveying unit 30 is mounted on the image reading unit 20 by a second opening / closing member 42 such as a hinge so that the document conveying unit 30 can be opened and closed upward as in the image reading unit 20.

  Further, the image forming unit 10 is provided with first detecting means 43 for detecting opening / closing of the image reading unit 20, and the document detecting unit 30 has second detecting means for detecting opening / closing of the document conveying unit 30. 44 is provided. Further, the document transport unit 30 is provided with document detection means 45 for detecting whether a document is set on the document tray 31. Further, the scanner 23 is present at the home position in the image reading unit 20. A home position sensor 46 is provided for detecting the above.

  In the image forming apparatus according to this embodiment, the image reading unit 20 includes a first lock unit 50 that prohibits the image reading unit 20 from being released from the image forming unit 10 and the document conveying unit. And a second locking means 60 for prohibiting the opening of the image reading unit 30 from the image reading unit 20.

  Here, in the first locking means 50, the lock lever 52 is rotated by turning on and off the electromagnetic solenoid 51, and the lock lever 52 is moved from the image reading unit 20 to the image forming unit 10 by the electromagnetic solenoid 51. Thus, the image reading unit 20 is prohibited from being released from the image forming unit 10. Also in the second locking means 60, the lock lever 62 is rotated by turning on and off the electromagnetic solenoid 61. The electromagnetic solenoid 61 causes the lock lever 62 to move from the image reading unit 20 to the document conveying unit 30. The document conveying unit 30 is prohibited from being released from the image reading unit 20 by being pivoted so as to protrude and thereby being locked.

  In the image forming apparatus according to the first embodiment, as shown in FIG. 3, the scanner 23 reads the document conveyed to the home position P1 and the first document reading unit 21. The document is stopped at the document reading position P2 and the standby position P3.

  When the scanner 23 is in the first document reading position P2 and the standby position P3, the first reading means 20 prohibits the image reading unit 20 from being released from the image forming unit 10. I have to.

  In the image forming apparatus according to the first embodiment, a document is set on the document tray 31 in the document transport unit 30, and the document detection unit 45 detects that a document exists on the document tray 31. Then, the scanner 23 is moved to the first document reading position P2, and the image reading unit 20 is prohibited from being released from the image forming unit 10 by the first locking means 50. Further, when the original guided to the first original reading unit 21 by the original conveying unit 30 is read by the scanner 23, the scanner 23 is guided to the standby position P3 to perform color correction or the like. The first lock unit 50 prohibits the image reading unit 20 from being released from the image forming unit 10.

  Then, when all the documents set on the document tray 31 are guided to the first document reading unit 21 and discharged, and the document detection unit 45 detects that there is no document on the document tray 31. When the home position sensor 46 detects that the scanner 23 has been moved to the home position P1 and the scanner 23 has been guided to the home position P1, the first lock means 50 is opened, and the image is displayed. The reading unit 20 can be opened from the image forming unit 10.

  In the image forming apparatus according to the first embodiment, when the scanner 23 is at the first document reading position P2 and the standby position P3, the image reading unit 20 is moved by the first locking unit 50. Although the release from the image reading unit 20 is prohibited, the document conveying unit 30 is prohibited from being released from the image reading unit 20 by the second locking unit 60 instead of the first locking unit 50. It can also be.

  In addition to the position of the scanner 23, when the first detection unit 43 detects that the image reading unit 20 is released from the image forming unit 10, the second lock unit 60 conveys the document. While the unit 30 is prohibited from being released from the image reading unit 20, the first lock is detected when the second detection unit 44 detects that the document transport unit 30 is released from the image reading unit 20. It is also possible to prohibit the image reading unit 20 from being released from the image forming unit 10 by the means 50.

  Next, in the image forming apparatus according to the second embodiment, as shown in FIG. 4, the scanner 23 reads a document conveyed to the home position P1 and the first document reading unit 21. The first document reading position P2, the standby position P3, and the intermediate position P4 between the first document reading position P2 and the standby position P3 are stopped.

  When the scanner 23 is at the first document reading position P2, the first locking unit 50 prohibits the image reading unit 20 from being released from the image forming unit 10, and when the scanner 23 is at the standby position P3. When the document feeding unit 30 is prohibited from being released from the image reading unit 20 by the second locking means 60 and is at an intermediate position P4 between the first document reading position P2 and the standby position P3. The first lock unit 50 and the second lock unit 60 prohibit the image reading unit 20 from being released from the image forming unit 10 and the document conveying unit 30 is released from the image reading unit 20. Is also prohibited.

  Here, in the image forming apparatus according to the second embodiment, when the power of the image forming apparatus is turned off, the scanner 23 moves to the intermediate position P4, and the image reading unit 20, the document conveying unit 30, and the like. For example, even if an unexpected force is applied to the image forming apparatus in a state where the power of the image forming apparatus is turned off, the image reading unit 20 and the document conveying unit 30 are prohibited. Is prevented from being accidentally released and damaged by hitting a person or an object, or falling over in the case of a small-sized image forming apparatus.

  Then, when the scanner 23 is at the first document reading position P2 as described above, the image reading unit 20 is prohibited from being opened by the first locking means 50, and when it is at the standby position P3, the second lock is performed. When the document transport unit 30 is prohibited from being opened by the means 60 and is at an intermediate position P4 between the first document reading position P2 and the standby position P3, the first lock means 50 and the second lock means 60 When the opening of both the image reading unit 20 and the document conveying unit 30 is prohibited by the above-described operation, the electromagnetic solenoid 51 in the first lock unit 50 is turned on / off and the electromagnetic solenoid 61 in the second lock unit 60 is turned on as described above. On / off can be performed by electrical control.

  In addition to electrically controlling on / off of the first lock means 50 and the second lock means 60 as described above, the first lock means 50 moves in the vertical direction as shown in FIGS. The movable member 53 is urged upward by the urging member 54, and the lower end portion of the movable member 53 is used so that the lock lever 55 can be rotated, and the second lock means 60 is moved in the vertical direction. The movable member 63 is urged downward by the urging member 64, and the movable member 63 is rotatably attached to the upper end portion of the movable member 63. A pressing plate 23a that presses 53 and 63 against the urging members 54 and 64, respectively, is provided along the moving direction, the scanner 23 is moved and stopped at an appropriate position, and the above-mentioned first plate. Click means 50 and the on-off of the second locking means 60 may also be mechanically controlled.

  When the scanner 23 is at the home position P1, as shown in FIG. 5, the pressing plate 23a provided on the scanner 23 is the movable member 53 of either the first lock means 50 or the second lock means 60. 63, and the movable members 53, 63 are maintained in a state of being urged by the urging members 54, 64, respectively, and the image forming unit 10 and the document conveying unit 30 are respectively held by the lock levers 55, 65. Is not locked, and the image reading unit 20 and the document transport unit 30 can be freely opened.

  Next, when the scanner 23 is moved and guided to the first document reading position P2, as shown in FIG. 6, the first lock means 50 is moved by the pressing plate 23a provided on the scanner 23. Only the member 53 is pushed downward against the urging member 54, so that the lock lever 55 in the first lock means 50 is rotated while entering the image forming unit 10 from the image reading unit 20, and this lock lever 55 is locked to the image forming unit 10, and the first locking means 50 prohibits the image reading unit 20 from being released from the image forming unit 10. On the other hand, in the second lock means 60, the movable member 63 is maintained in a state of being biased downward by the biasing member 64, the lock lever 65 is not locked to the document transport unit 30, and the document transport unit 30 is The reading unit 20 can be freely opened.

  When the scanner 23 is moved and guided to an intermediate position P4 between the first document reading position P2 and the standby position P3, as shown in FIG. 7, a pressing plate provided on the scanner 23 23a, the movable member 53 in the first lock unit 50 is pushed downward against the biasing member 54, and the lock lever 55 in the first lock unit 50 is thereby pushed into the image forming unit 10 from the image reading unit 20. The lock lever 55 is locked to the image forming unit 10 and the movable member 63 in the second lock means 60 is pushed upward against the biasing member 64, thereby the second lock. The lock lever 65 in the means 60 is rotated while entering the document transport unit 30 from the image reading unit 20, and the lock lever 65 is Locked to the transport unit 30, both the image reading unit 20 and conveyance unit 30, so that is prohibited from being opened by the first locking means 50 and the second locking means 60.

  Further, when the scanner 23 is moved and guided to the standby position P3, as shown in FIG. 8, only the movable member 63 in the second lock means 60 is pressed by the pressing plate 23a provided in the scanner 23. The biasing member 64 is pushed upward against the urging member 64, whereby the lock lever 65 in the second locking means 60 is rotated while entering the document conveying unit 30 from the image reading unit 20, and the lock lever 65 is rotated. The second locking means 60 prohibits only the document conveying unit 30 from being released from the image reading unit 20. On the other hand, in the first lock means 50, the movable member 53 is maintained in a state of being biased upward by the biasing member 54, the lock lever 55 is not locked to the image forming unit 10, and the image reading unit 20 is The forming unit 10 can be freely opened.

  Next, in the image forming apparatus according to the second embodiment, the scanner 23 is moved, and the opening of the image reading unit 20 and the document transport unit 30 is controlled by the first lock unit 50 and the second lock unit 60. The operation will be described based on the flowchart shown in FIG.

  It is determined whether the power switch is turned on (S1). If the power switch is turned on, the power is turned on (S2), and the scanner 23 is moved to the home position P1 (S3).

  Next, it is determined whether or not a document is set on the document tray 31 by the document detection means 45 (S4). When a document is set, the scanner 23 is moved to the first document reading position P2 (S5). As described above, the image reading unit 20 is locked to the image forming unit 10 by the first locking means 50, and the image reading unit 20 is prohibited from being opened (S6).

  On the other hand, if it is determined whether the document has been set (S4), if no document is set on the document tray 31, it is determined whether the document transport unit 30 is open (S7). When the document is opened, the scanner 23 is moved to the first document reading position P2 as in the case where the document is set (S5), and the image reading unit 20 is moved by the first lock means 50 as described above. Is locked to prohibit the image reading unit 20 from being opened (S6), thereby preventing both the document conveying unit 30 and the image reading unit 20 from being opened.

  If the document transport unit 30 is not opened in the determination of whether the document transport unit 30 is opened (S7), it is determined whether the image reading unit 20 is opened (S8). When the reading unit 20 is opened, the scanner 23 is moved to the standby position P3 (S9), and the document conveying unit 30 is locked by the second locking means 60 as described above, so that the document conveying unit 30 is opened. This is prohibited (S10), and both the image reading unit 20 and the document conveying unit 30 are prevented from being opened.

  As described above, after the opening of the image reading unit 20 is prohibited in (S6), or after the opening of the document conveying unit 30 is prohibited in (S10), whether the image reading unit 20 is open. After determining that the image reading unit 20 is not opened in the determination (S8), the power switch is not turned off until the power switch is turned off, that is, in the determination of whether the power switch is turned off (S11). Now, returning to the above (S4), the above operation is repeated.

  On the other hand, when the power switch is turned off, the scanner 23 is moved to the intermediate position P4 between the first document reading position P2 and the standby position P3 (S12), and the first lock means 50 and the second lock described above are moved. The image reading unit 20 and the document conveying unit 30 are locked by the means 60 to prohibit the image reading unit 20 and the document conveying unit 30 from being opened (S13), and then the power is turned off (S14). )finish.

  This prevents the image reading unit 20 and the document conveying unit 30 from being opened without permission when the power of the image forming apparatus is turned off, even if an unexpected force is applied to the image forming apparatus. These are prevented from being opened and hit against people or objects, or falling down in the case of a small image forming apparatus.

DESCRIPTION OF SYMBOLS 10 Image forming unit 11A-11D Imaging cartridge 12a Photoconductor, 12b Charging device, 12c Latent image forming device, 12d Developing device 13 Intermediate transfer belt 14 Transfer roller 15 Paper feed roller 16 Timing roller 17 Fixing device 20 Image reading unit 21 1st Document reading unit 22 Second document reading unit 23 Scanner, 23a Press plate 30 Document transport unit 31 Document tray 32 Roller 41 First opening / closing member 42 Second opening / closing member 43 First detection means 44 Second detection means 45 Document detection means 46 Home Position sensor 50 First lock means 60 Second lock means 51, 61 Electromagnetic solenoid 52, 62 Lock lever 53, 63 Movable member 54, 64 Biasing member 55, 65 Lock lever P1 Home position P2 First document reading position P3 Aircraft position P4 intermediate position S the recording sheet

Claims (7)

  An image forming unit that forms an image on a recording sheet; an image reading unit that is mounted on the image forming unit so as to be opened and closed; An image forming apparatus including a document transport unit that transports the first document reading unit of the image reading unit to the image reading unit and the document transport unit based on a stop position of the scanner that moves in the image reading unit. An image forming apparatus comprising: a lock unit that prohibits opening of at least one of the image forming apparatus and the image forming apparatus.   2. The image forming apparatus according to claim 1, wherein the image reading unit and the document transport unit are opened and closed in the same direction.   3. The image forming apparatus according to claim 1, further comprising a document detection unit that detects that a document has been set on the document transport unit, and the document detection unit detects that the document has been set. In this case, the scanner moves to the first document reading operation position for reading the document conveyed to the first document reading unit by the document conveying unit, and the image reading unit and the document conveying unit are moved by the locking unit. An image forming apparatus, wherein at least one of the opening is prohibited.   4. The image forming apparatus according to claim 1, wherein a first lock unit that prohibits the opening of the image reading unit and a second lock unit that prohibits the opening of the document transport unit. An image forming apparatus provided with the image forming apparatus.   5. The image forming apparatus according to claim 1, further comprising: a first detection unit that detects opening / closing of the image reading unit; and a second detection unit that detects opening / closing of the document conveyance unit. Based on the detection results of the first detection means and the second detection means, the scanner moves to a predetermined position, and the locking means prohibits opening of at least one of the image reading unit and the document transport unit. An image forming apparatus.   6. The image forming apparatus according to claim 1, wherein when the power is turned off, the scanner moves to a predetermined position, and the document conveying unit and the image are moved by the locking unit. An image forming apparatus, wherein opening of both of the reading unit and the reading unit is prohibited. An image forming unit that forms an image on a recording sheet; an image reading unit that is mounted on the image forming unit so as to be opened and closed; In an image forming apparatus including a document transport unit that transports to a first document reading unit of an image reading unit, a first detection unit that detects opening and closing of the image reading unit and a second detection unit that detects opening and closing of the document transport unit When the opening of the image reading unit or the document conveying unit is detected in the first detecting means or the second detecting means, the locking means prohibits the opening of the other document conveying unit or the image reading unit. An image forming apparatus.

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