JP2011011838A - Sheet carrying device and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a conventional unlock linking system serves to cancel a plurality of locks of an image forming device at the same time to improve operability, assuming that the device is constructed with guide members having the same turning direction, and so it is not applicable for unlocking a plurality of doors having different turning directions.SOLUTION: A reversing door 57 and a lower guide 84 have mutually different turning directions and overlapped turning tracks. The lower guide 84 is locked to a closing position by a guide hook 93 of a latch shaft 95. When the reversing door 57 is opened, an abutting portion 88 of the reversing door 57 abuts on an unlocking member 87 of the latch shaft 95 so that the latch shaft 95 is turned to unlock the lower guide 84 from the guide hook 93.

Description

  The present invention relates to a sheet conveying apparatus and an image forming apparatus provided with a guide member that is opened when a sheet jam (sheet clogging) or the like occurs.

  In an image forming apparatus such as a copying machine or a printer, a sheet feeding unit that feeds a sheet before image formation, a sheet conveyance device that conveys the sheet from the sheet feeding unit so that an image is transferred by the transfer unit, It has. Further, the sheet on which the image is transferred by the transfer unit is discharged onto the discharge tray by the discharge unit.

  The sheet conveying apparatus is provided with a conveying roller for conveying a sheet, a pinch roller (roller) that forms a nip that contacts the conveying roller and inserts the sheet, a guide member that constitutes a sheet conveying path, and the like. .

  By the way, when a jam occurs in the sheet conveying apparatus, it is necessary to remove the sheet that caused the jam. For example, there is a sheet conveying device that includes a side door that allows the sheet conveying path to be exposed, opens the side door to expose the sheet conveying path and the conveying member, and removes the sheet.

  However, if a plurality of doors are provided in the sheet conveying apparatus, a plurality of doors must be opened to remove a sheet due to a jam. Since each of the plurality of doors is opened, the jam handling operation takes time and the operability is poor. In particular, each door is provided with a lock member, and it is necessary to release each lock member one by one and open the door.

  In view of this, a configuration has been proposed in which the locks of the plurality of lock members for locking the plurality of doors are simultaneously released by manually operated release means (see Patent Document 1). That is, the plurality of lock members that lock the plurality of doors are operated by the common release member, and the user operates the common release member to simultaneously unlock the plurality of lock members.

Japanese Patent Laid-Open No. 2007-077681

  In the case of unlocking a plurality of lock members by operating a common release member, the plurality of lock members are usually arranged on the end side opposite to the rotation shafts of the plurality of doors arranged side by side. Yes. That is, the rotation directions of the plurality of doors are the same direction, and the plurality of lock members are provided side by side in the direction of the rotation axis on the same side of the sheet conveying apparatus. Therefore, the lock release of the plurality of lock members can be released by a common release member extending in parallel with the rotation shaft.

  However, in the sheet conveying apparatus, for example, a horizontal conveying path that guides the sheet substantially horizontally and a vertical conveying path that guides the sheet substantially vertically may be arranged close to each other. In such a case, the doors that open the horizontal conveyance path and the doors that open the vertical conveyance path have different rotation directions. Thus, in the structure provided with the doors whose rotation directions are different from each other, it is impossible to apply the conventional technique as it is to the common release member for releasing the lock member of each door. Because the rotation axis of each door intersects, the door ends suitable for the arrangement of the lock member are in different positions in the closed state, and the distance between the lock members is long. Because it becomes.

  An object of the present invention is to improve user operability with respect to unlocking of a door in a configuration including a plurality of doors having different rotation directions.

  According to the present invention, a first guide member rotatably supported so as to be able to open a first conveyance path in which a sheet is conveyed, and a rotatable so as to be able to open a second conveyance path in which a sheet is conveyed. The second guide member is supported by the first guide member and has a rotation direction different from that of the first guide member, locking means for locking the first guide member, and the second guide member rotates in a direction to open the conveyance path. And a interlocking means for unlocking the locking means in conjunction with the sheet conveying device.

  In the present invention, in a configuration in which a plurality of guide members are pivotally supported in different rotation directions, improvement in operability of opening and closing the guide members during jam processing can be realized with a simple configuration.

1 is a cross-sectional view of an image forming apparatus according to the present invention. 1 is a perspective view of the appearance of an image forming apparatus according to the present invention. The perspective view which shows the structure for the jam process of an inversion part. The perspective view showing the composition of the lower guide. The perspective view explaining the locking mechanism of a lower guide. The perspective view which shows the state which opened the inversion door. FIG. 3 is a cross-sectional view of the image forming apparatus when the finisher is not attached.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the following embodiments should be changed as appropriate according to the configuration of the apparatus to which the present invention is applied and various conditions. It is not intended to limit the scope of the present invention only to them.

  FIG. 1 is a schematic cross-sectional view of an image forming apparatus which is an example of an embodiment of the present invention. FIG. 2 is a perspective view of an image forming apparatus as an example of an embodiment of the present invention.

  The image forming apparatus according to this embodiment includes an image forming apparatus main body 1 and a finisher 80. The image forming apparatus is a color image forming apparatus using an electrophotographic system, and four color image forming units are arranged above the intermediate transfer belt because of the advantage of adaptability to various sheet materials and excellent print productivity. An intermediate transfer tandem system is used.

  The configuration of the image forming apparatus will be described with reference to FIG.

  The image forming apparatus includes a sheet feeding unit 101 that feeds a sheet, and a sheet conveying device 109 that conveys the sheet fed by the sheet feeding unit 101. Further, the image forming apparatus is provided with an image forming unit 102 that forms an image on a sheet conveyed by the sheet conveying device 109.

  The sheet feeding unit 101 includes sheet storage units 30 to 34 and sheet feeding units 35 to 39.

  The image forming unit 102 includes a photoreceptor 61 (61Y, 61M, 61C, 61K), a charging device 62 (62Y, 62M, 62C, 62K), an exposure device 63 (63Y, 63M, 63C, 63K), and a developing device 64 (64Y). 64M, 64C, 64K). Further, the image forming unit 102 includes a primary transfer device 66 (66Y, 66M, 66C, 66K) and a photoreceptor cleaner 65 (65Y, 65M, 65C, 65K).

  The image forming unit 102 transfers the toner image formed on the photoreceptors 61Y, 61M, 61C, and 61K to the sheet, and the intermediate transfer belt 67 to which the toner image is primarily transferred, and the full color toner image superimposed and transferred to the intermediate transfer belt 67 to the sheet. The transfer roller 43 is provided. The intermediate transfer belt 67 is stretched by rollers such as a driving roller 68, a tension roller 69, and a secondary transfer inner roller 70, and is conveyed and driven in the direction of arrow B in the drawing. The image forming unit 102 further includes a fixing device 45 that fixes the image on the sheet onto which the toner image is transferred.

  The sheet conveying device 109 includes conveying paths 40 and 41 through which the sheet fed by the sheet feeding units 35 to 39 passes, and a registration roller 42 that sends the sheet to a nip position between the intermediate transfer belt 67 and the transfer roller 43. Yes. Further, the sheet conveying device 109 includes a pre-fixing conveying belt 44 that sends the sheet having the toner image transferred thereto to the fixing device 45.

  The sheet conveying device 109 includes a reversing unit 85 that switches back and conveys a sheet on the downstream side of the fixing device 45 in the conveying direction. The reversing unit 85 is provided with a paper discharge conveyance path 51, a reversing guiding path 52, and a switchback path 55 through which the sheet that has passed through the reversing guiding path 52 passes. The reversing unit 85 includes a reversing upper roller pair 53 and a reversing lower roller pair 54 provided in the switchback path 55.

  Reference numeral 47 denotes a double-sided conveyance path that conveys a sheet whose conveyance direction is reversed in the switchback path 55 of the reversing unit 85, and is connected to the conveyance path 41. The sheet conveying device 109 further includes a buffer path 81 as a first conveying path that conveys the sheet to the post-processing unit 108 on the downstream side of the paper discharge conveying path 51.

  Detailed configurations of the inverting unit 85 and the buffer path 81 will be described later.

<Sheet transport process>
The sheets are stored so as to be stacked on the sheet storage units 30 to 34, and are fed by the sheet feeding units 35 to 39 in accordance with the image forming timing. The sheet S sent out by the sheet feeding means 35 to 39 passes through the transport path 40 or 41 and is transported to the registration roller 42.

  The registration roller 42 corrects skew by causing the sheet S conveyed from the sheet storage units 30 to 34 to abut and creating a loop to follow the leading edge of the sheet S. Further, the registration roller 42 transfers the sheet S to the secondary transfer portion at a predetermined timing in accordance with the timing of image formation on the sheet S, that is, the toner image carried on the intermediate transfer belt 67 which is an image carrier. Transport. After correcting the skew, the registration roller 42 sends the sheet S to the secondary transfer unit at a desired timing. The secondary transfer portion is a toner image transfer nip portion to the sheet S formed by the secondary transfer inner roller 70 and the transfer roller 43 that are disposed to face each other. The toner image is transferred onto the sheet S by applying a predetermined pressure and an electrostatic load bias in the secondary transfer portion.

<Image creation process>
An image forming process performed at the same time as the sheet conveying process up to the secondary transfer unit will be described.

  The charging device 62 uniformly charges the surface, and the rotating photosensitive member 61 is driven on the basis of the transmitted image information signal to form a latent image. The electrostatic latent image formed on the photosensitive member 61 is developed as a toner image on the photosensitive member 61 through toner development by the developing device 64. Thereafter, a predetermined pressure and electrostatic load bias are applied by the primary transfer device 66, and the toner image is transferred onto the intermediate transfer belt 67. Thereafter, the transfer residual toner slightly remaining on the photoconductor 61 is collected by the photoconductor cleaner 65 to prepare for the next image formation again. The image formation described above is performed for each of yellow (Y), magenta (M), cyan (C), and black (K).

  The Y, M, C, and K color toner images formed on the photoreceptor 61 are primarily transferred onto the intermediate transfer belt 67, and a full-color toner image is formed on the intermediate transfer belt 67.

<Process after secondary transfer>
A full-color toner image is secondarily transferred onto the sheet in the secondary transfer portion. Thereafter, the sheet S is transported to the fixing device 45 by the pre-fixing transport belt 44. The fixing device 45 melts and fixes the toner image on the sheet S with a predetermined pressure applied by an opposing roller or belt or the like, and generally with heat from a heat source such as a heater. The sheet having the fixed image obtained in this way passes through the internal paper discharge roller 46, either the paper discharge conveyance path 51, or the reverse guide path 52 when reverse paper discharge or double-sided image formation is required. The route is selected to be transported.

  The sheet conveyed in the discharge conveyance path 51 by the inner discharge roller 46 is sent to the post-processing unit 108 via the buffer path 81 in the finisher 80, and the post-processing unit 108 performs post-processing as necessary. Is given. The sheet is finally discharged to the discharge stacking sections 83b, 83c, and 83d.

  When double-sided image formation is required, the sheet S is drawn into the switchback path 55 from the reverse guide path 52 via the reverse upper roller pair 53 and the reverse lower roller pair 54. In the switchback path 55, the rotation direction of the reverse lower roller pair 54 is reversed (switchback operation) so that the leading and trailing edges of the sheet are switched, and the sheet is conveyed to the duplex conveyance path 47. Thereafter, the double-sided rollers 48a to 48d join the conveyance path 41 in synchronism with the subsequent sheets conveyed from the respective sheet feeding units 35 to 39, and are sent to the secondary transfer unit via the registration rollers 42. .

  The image forming process on the back surface (second surface) is the same as that of the above-described front surface (first surface), and thus description thereof is omitted.

  When the sheet is reversed and discharged, the sheet is drawn from the reversing guide path 52 to the switchback path 55, and then retreated in the direction opposite to the feeding direction by reversing the reversing upper roller pair 53 and the reversing lower roller pair 54. Then, it is sent to the buffer path 81 via the reverse paper discharge path 56.

<Configuration for Jam Processing of Inversion Unit 85 and Buffer Path 81>
Next, a configuration for removing a sheet staying in the reversing unit 85 or the buffer path 81 when a jam occurs will be described.

  First, the configuration of the reversing unit 85 will be described with reference to FIG. 3A which is a perspective view of the image forming apparatus showing the vicinity of the reversing unit 85. In FIG. 3A, the finisher 80 is not shown for the sake of clarity of the configuration of the reversing unit 85. Further, the side facing the front of the image forming apparatus is called the apparatus front side, and the side opposite to the apparatus front side is called the apparatus back side.

  The reversing portion 85 is provided with a reversing door 57 that is rotatable on the image forming apparatus main body 1. The reversing door 57 is supported by the image forming apparatus main body 1 so as to be rotatable by a hinge provided on the back side of the apparatus. Reference numeral 93 denotes the rotation center of the reversing door 57, and the reversing door 57 is rotated about the vertical rotation center 93 as shown in the figure. That is, the reversing door 57 can be rotated in the horizontal direction around the rotation center on the back side of the apparatus.

  The reverse door 57 holds one roller of the reverse upper roller pair 53. The reverse door 57 holds one roller of the reverse lower roller pair 54. The inner surface of the reversing door 57 serves as a transport guide surface that forms a switchback path 55 and a reversing guide path 52 that are second transport paths. As shown in FIG. 5, by turning the reversing door 57, the reversing upper roller pair 53 and the reversing lower roller pair 54 are separated from each other, and the reversing guide path 52 and the switchback path 55 as the second transport path can be opened. Become. By rotating the reversing door 57, the jammed state of the sheets staying in the paper discharge conveyance path 51, the reverse guiding path 52, the switchback path 55, and the reverse paper discharge path 56 (see FIG. 1) is obtained. The reversing door 57 is provided with a delivery guide 86 that is a guide member for guiding the sheet to the buffer path 81 of the finisher 80.

  The reverse door 57 is provided with a door lock mechanism 201 for locking the reverse door 57 in the closed position. As shown in detail in FIG. 3B, the door lock mechanism 201 includes a hook shaft 202 that is rotatably provided on the reversing door 57, and a reversing hook 92 and a handle 91 that are provided on the hook shaft 202. Composed. The reverse hook 92 locks the reverse door 57 in the closed position by engaging with a pin 96 provided in the image forming apparatus main body 1. The handle 91 is exposed from the outer surface of the reversing door 57. The reversing hook 92 can be disengaged from the pin 96 of the image forming apparatus main body by operating the handle 91 by the user and rotating the hook shaft 202 in the releasing direction 203.

  That is, when the reversing door 57 is opened, the reversing hook 92 is unlocked by the user operating the handle 91 as the unlocking operation portion. On the other hand, when the reversing door 57 is closed, the reversing hook 92 automatically locks it.

  In order to obtain the nip pressure of the reverse lower roller pair 54, the rollers of the reverse lower roller pair 54 are biased by a biasing spring (not shown) as a biasing means. Similarly to the reverse lower roller pair 54, the reverse upper roller pair 53 is also biased by a bias spring so as to obtain a nip pressure. Due to the reaction force of the urging spring, when the reversing door 57 is closed, a force is always applied to the reversing door 57 in the opening direction. When the reversing door 57 is closed, a force in the opening direction is applied to the reversing door 57 by contraction of the biasing spring, but the reversing hook 92 and the pin 96 are engaged to restrict the opening of the reversing door 57. It has become a state. In other words, the nip pressure of the reverse lower roller pair 54 and the reverse upper roller pair 53 is obtained by using an urging spring by preventing the reverse door 57 from moving in the opening direction by the reverse hook 92.

  Next, a configuration for opening the buffer path 81 provided in the finisher 80 as a paper discharge option will be described with reference to FIG. FIG. 4 is a perspective view showing the vicinity of the buffer path 81. FIG. 4A shows a state in which the buffer path 81 is closed, and FIG. 4B shows that the buffer path 81 is opened. Each process is shown.

  A lower guide 84 as a first guide member of the present invention is rotatably attached to the main body of the finisher 80. The upper surface of the lower guide 84 is a guide surface that forms the buffer path 81. In FIG. 6, 999 indicates the rotation center of the lower guide 84. The rotation center 999 of the lower guide 84 extends in a horizontal direction (the front-rear direction of the apparatus) and is orthogonal to the rotation center of the reversing door 57 described above.

  As shown in FIG. 4B, the buffer path 81 is opened by rotating the lower guide 84 pivoted on one end side downward. In FIG. 4B, 401 indicates a direction in which the lower guide 84 rotates so as to expose the buffer path 81. In FIG. 4B, reference numeral 84A indicates a normal position where the lower guide 84 forms a conveyance path. The lower guide 84 is rotatable from the position indicated by 84A to the position indicated by 84B and to the position of 84C which is the maximum open position.

  The reason why the center of rotation of the lower guide 84 extends in the front and back direction of the apparatus is to reduce the space required to rotate the lower guide 84 of the buffer path 81 and perform jam processing. .

A mechanism for locking the lower guide 84 will be described with reference to the perspective view of FIG.
A latch shaft 95 is rotatably attached to the lower guide 84. A guide hook 93 as a latch portion is provided at the end of the latch shaft 95 on the rear side of the device. A knob 94 as an operation lever for the user to operate is provided at the end of the latch shaft 95 on the front side of the apparatus. The latch shaft 95 is provided with an unlocking member 87 as an unlocking portion. The lock release member 87 contacts a contact portion 88 formed on the reversing door 57.

  The claw-shaped guide hook 93 locks the lower guide 84 in the closed position by engaging with a pin 997 provided on the main body of the finisher 80. When the lower guide 84 is closed, the lock is applied by the guide hook 93 as the locking means of the present invention. When the lower guide 84 is opened, the lock is released by turning the knob 94 by the user, and the lower guide 84 is lowered by its own weight. The guide 84 rotates.

  Here, as shown in FIG. 5, the lower guide 84 is disposed in the vicinity of the reversing door 57. The lower guide 84 of the buffer path 81 and the turning trajectory of the reversing door 57 overlap each other.

The opening / closing operation of the reversing door 57 and the lower guide 84 in this embodiment will be described in detail mainly with reference to FIG.
By opening the reversing door 57 from the closed position, the contact portion 88 of the reversing door 57 comes into contact with the lock release member 87 and the latch shaft 95 is rotated so that the engagement between the guide hook 93 and the pin 997 is released. . That is, when the abutting portion 88 abuts on the unlocking member 87 by opening the reversing door 57, the unlocking member 87 receives a horizontal force and rotates clockwise around the latch shaft 95. . With the rotation of the latch shaft 95, the guide hook 93 provided on the latch shaft 95 also rotates clockwise, and the lock by the guide hook 93 is released (see FIG. 5B). It is to be noted that the interlocking means of the present invention is configured to unlock the guide hook 93 in conjunction with the contact portion 88 of the reversing door 57 and the unlocking member 87 rotating in the opening direction of the reversing door 57. ing.

  In this embodiment, the guide hook 93 is unlocked by an unlocking operation of the reversing door 57 as the second guide member of the present invention. As described above, the reversing door 57 receives a force in the opening direction due to the reaction force of the urging spring for obtaining the nip force of the reversing upper roller pair 53 and the reversing lower roller pair 54. When the handle 91 is operated so as to release the lock of the reverse hook 92 as the second lock means for locking the reverse door 57, the biasing spring for obtaining the nip force of the reverse upper roller pair 53 and the reverse lower roller pair 54 is obtained. Due to the force, the reversing door 57 rotates in the opening direction. By the movement of the reversing door 57, the engagement between the guide hook 93 and the pin 997 is released. That is, the urging spring compressed in the state where the reversing door 57 is closed expands when the reversing hook 92 is released, and the reversing door 57 moves by the urging force of the urging spring. At this time, the contact portion 88 rotates the lock release member 87 so that the engagement between the guide hook 93 and the pin 997 is released by the movement of the reversing door 57 by the biasing force of the biasing spring.

  Here, since the reversing door 57 is rotated in the horizontal direction at the hinge portion on the back side of the apparatus, the amount of movement on the front side of the apparatus is larger even at the same rotation angle. Therefore, an abutting portion 88 is provided on the front side of the delivery guide 86, that is, on the side opposite to the hinge portion of the reversing door 57 across the sheet passing area of the conveyed sheet. In this way, when the opening angle of the reversing door 57 is small, the contact portion 88 is brought into contact with the lock release member 87, so that the guide hook 93 can be reliably unlocked.

  When the engagement between the guide hook 93 and the pin 997 is released, the lower guide 84 is rotated by its own weight to a position where the portion of the lower guide 84 on the upstream side in the transport direction faces downward. When the reversing door 57 is further opened from this state, the tip of the delivery guide 86 of the reversing door 57 pushes the lower guide 84, and the lower guide 84 can further rotate (see FIG. 6). As described above, the lower guide 84 can be rotated by disengaging the guide hook 93 and the pin 997 by operating the knob 94 without opening the reversing door 57.

  As described above, the lower guide 84 of the buffer path 81 and the turning locus of the reversing door 57 overlap each other. When the reversing door 57 is opened, the lower guide 84 is unlocked, and the lower guide 84 is rotated by opening the reversing door 57.

  Further, by turning the knob 94 counterclockwise, the unlocking member 87 pushes the contact portion 88 of the delivery guide 86 to close the reversing door 57 and the reversing hook 92 can lock the reversing door 57. That is, the operation of the knob 94 locks the lower guide 84 and the reversing door 57.

  The reversing door 57 and the lower guide 84 are opened while the finisher exterior cover 209 on the front side of the apparatus shown in FIG. 2 is opened.

The effect will be described in this embodiment.
In conjunction with the opening of the reversing door 57, the lower guide 84 is unlocked by the guide hook 93. Therefore, the operability for unlocking the guide hook 93 is improved. When the reversing door 57 is opened, the reversing door 57 and the lower guide 84 come into contact with each other to rotate the lower guide 84. Therefore, although the turning trajectory of the reversing door 57 and the turning trajectory of the lower guide 84 overlap, the reversing door 57 and the lower guide 84 cause inconvenient interference due to an error in the user's operation procedure. And will not be damaged.

  Since the reverse door 57 is rotated from the closed position by the user's operation on the handle 91 for releasing the lock of the reverse door 57 and the lower guide 84 is unlocked by the guide hook 93, the operability is good. The rotation of the reversing door 57 at this time is reasonable because the urging force of the urging spring for obtaining the nip pressure of the reversing lower roller pair 54 and the reversing upper roller pair 53 contributes.

  The lower guide 84 is unlocked by contacting the unlocking member 87 provided on the latch shaft 95 and the contact portion 88 of the reversing door 57 when the reversing door 57 is opened. Here, in the present embodiment, the contact portion 88 is provided on the opposite side of the hinge portion of the reversing door 57 across the sheet passing area of the conveyed sheet. Therefore, when the opening angle of the reversing door 57 is small, the guide hook 93 is unlocked. Compared with the case where the contact portion with the unlocking member 87 is provided at a position near the hinge portion of the reversing door 57, the amount of movement of the contacting portion 88 is increased even at the same rotation angle of the reversing door 57. Because. This is because the urging force of the urging spring for obtaining the nip pressure of the reverse lower roller pair 54 effectively contributes to the unlocking of the guide hook 93, which is accompanied by the unlocking of the guide hook 93 by the user. This leads to a reduction in operating force.

Further, in the above-described embodiment, an example in which the guide hook 93 is on the back side of the apparatus is shown, but a configuration in which one guide hook 93 is used on the back side and on the near side may be used. Further, as described above, a latch mechanism using a hook and a lock mechanism using a magnet together may be used.
Note that the finisher 80 of the present embodiment is detachable from the image forming apparatus main body 1. When the finisher 80 is removed, as shown in FIG. 7, the discharge tray 50 is attached to the reversing door 57 of the image forming apparatus main body 1, and the sheet on which the image has been formed is discharged onto the discharge tray 50.

1 Image forming apparatus 55 Switchback path (second transport path)
57 Reversing door (second guide member)
81 Buffer path (first transport path)
84 Lower guide (first guide member)
87 Unlocking member (interlocking means)
88 Contact part (interlocking means)
93 Guide hook (locking means, latch)
95 Latch shaft

Claims (6)

A first guide member rotatably supported so as to be able to open a first conveyance path through which a sheet is conveyed;
A second guide member that is rotatably supported so as to be able to open the second conveyance path through which the sheet is conveyed, and has a rotation direction different from that of the first guide member;
Locking means for locking the first guide member;
A sheet conveying apparatus comprising: interlocking means for unlocking the locking means in conjunction with rotation of the second guide member in a direction to open the second conveying path. The locking means is provided on a rotatable shaft,
The interlocking means is constituted by a lock releasing portion provided on the shaft and in contact with the second guide member,
When the second guide member is rotated so as to open the second conveyance path, the second guide member comes into contact with the lock release portion so as to release the lock of the first guide member by the lock means. The sheet conveying apparatus according to claim 1, wherein the shaft is rotated. Second locking means for locking the second guide member;
An unlocking operation unit for releasing the lock by the second locking means;
Urging means for urging the second guide member in a direction to open,
When the lock by the second lock means is released by the operation of the unlock operation section, the second guide member is rotated by the biasing force of the biasing means,
2. The sheet conveying apparatus according to claim 1, wherein the interlocking unit causes the lock unit to be unlocked in conjunction with the rotation of the second guide member by the biasing force of the biasing unit. A hinge portion for rotatably supporting the second guide member;
The locking means is constituted by a claw-shaped latch portion provided on a rotatable shaft,
The interlocking means is configured by a lock release portion provided on the shaft and in contact with the second guide member, and when the second guide is rotated so as to open the second transport path, the second guide member Is in contact with the unlocking portion, and rotates the shaft so as to unlock the first guide member by the latch portion,
The sheet conveying apparatus according to claim 3, wherein the unlocking unit is disposed so as to sandwich a sheet passing region through which the conveyed sheet passes between the hinge unit. An operation lever provided on the shaft for locking the first guide member at the latch portion;
By the operation of locking the second guide member with respect to the operation lever, the unlocking portion pushes the second guide member to close the second guide member, and the second guide member is locked by the second locking means. The sheet conveying apparatus according to claim 4, wherein:   An image forming apparatus comprising: an image forming unit that forms an image on a sheet; and a sheet conveying device according to claim 1 that conveys a sheet on which an image is formed by the image forming unit. apparatus.

Images