JP6452462B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus, and more particularly to a configuration for opening an opening / closing member provided in an image forming apparatus main body.

  Conventionally, in an image forming apparatus such as a printer or a copying machine, in addition to a sheet feeding unit that feeds a standard size sheet stored in a feeding cassette, a manual feed for feeding an irregular size sheet (multi) Some have a paper feeder. The manual sheet feeder is provided with a manual tray, and when feeding an irregular size sheet, the sheet is stacked on the manual tray, and is provided inside the image forming apparatus main body (hereinafter referred to as the apparatus main body) with a feeding roller. The sheet is fed to the sheet conveyance path.

  The main body is equipped with an openable door that opens the sheet transport path during maintenance and jam (paper jam) handling, and the manual feed tray as the openable member can be opened and closed vertically. Is provided. The manual feed tray is accommodated in the apparatus main body by closing the opening / closing door when not in use, and can be stacked by opening the opening / closing door when in use.

  Here, in a conventional image forming apparatus, there is a case where a damper device is provided as an impact buffering means for suppressing the speed at the time of opening the manual feed tray and alleviating the impact at the time of opening. As such a damper device, for example, there is a configuration in which a manual tray is supported by a wire elastically supported using a tension spring to reduce an impact when the manual tray is opened (Patent Document 1).

JP 2010-97161 A

  However, when the shock absorbing means having such a configuration is provided, the wire is stored in a straight line, so that a wire storage space corresponding to the length of use of the wire is required and a space for operating the tension spring is required. The device body becomes larger.

  The present invention has been made in view of such a current situation, and provides an image forming apparatus having a configuration capable of reducing an impact when opening an opening / closing member (manual feed tray) without increasing the size. It is for the purpose.

In the image forming apparatus, the door is supported to be openable and closable with respect to the apparatus body around the first rotation axis, and is supported to be able to be opened and closed with respect to the door around the second rotation axis. A manual feed tray on which sheets are stacked, a feeding unit that feeds the sheets stacked on the manual feed tray, an image forming unit that forms an image on the sheet fed by the feeding unit, and a rotating member One end of the wire is wound around the rotating member, the wire is relayed to the door, and the other end is attached to the manual feed tray, and the rotating member is biased in the direction of winding the wire. and spiral spring, one end and the other end while being connected to the manual feed tray is coupled to the door, and a link for regulating the opening angle for the door of the manual feed tray, the manual feed tray, before When the manual feed tray is opened from the door in a state where the door is closed, the link is held at a predetermined opening angle with respect to the door by the link, and the spring is pulled to pull out the wire. When the door is opened with respect to the apparatus main body in a state where the take-up force according to the amount is received and the manual feed tray is opened with the predetermined opening angle with respect to the door, the unwound wire The door is closed at an angle smaller than the predetermined opening angle, and the moving end of the manual feed tray is held at an angle above the second rotation axis. is there.

  As in the present invention, the opening / closing member is biased in the direction opposite to the opening direction when the opening / closing member is opened by the spring spring through the flexible long member, so that the opening / closing member is not enlarged. The impact when opening can be reduced.

1 is a diagram illustrating a schematic configuration of an image forming apparatus according to an embodiment of the present invention. 4A is a diagram illustrating a closed state of a manual tray provided in a manual sheet feeding unit of the image forming apparatus, and FIG. (A) of the conveyance door provided in the said manual feed tray and the image forming apparatus main body is a figure which shows the state by which the conveyance door was open | released to the 1st opening angle, (b) is a conveyance door to a 2nd opening angle. The figure which shows the state open | released. (A) is a perspective view of the pulley unit provided in the image forming apparatus, (b) is a first diagram for explaining the configuration, and (c) is a second diagram for explaining the configuration. (A) of the said pulley unit is a figure which shows the state before a manual feed tray is open | released, (b) is a figure which shows a state when a manual feed tray is open | released. The figure which showed the relationship between the force which unwinds the wire which generate | occur | produces with the mainspring spring provided in the said pulley unit, and the unwinding length of a wire. The figure explaining the force added to a manual feed tray when opening the said manual feed tray.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of an image forming apparatus according to an embodiment of the present invention. As shown in FIG. 1, an image forming apparatus main body (hereinafter referred to as apparatus main body) 201A of an image forming apparatus 201 includes an image forming unit 201B that forms an image on a sheet, a sheet feeding unit 230, a manual paper feeding unit 300, and the like. Is provided. An image reading device 202 is disposed substantially horizontally above the apparatus main body 201A, and a discharge space S for sheet discharge is formed between the image reading apparatus 202 and the apparatus main body 201A. FIG. 1 is a cross-sectional view of the image forming apparatus 201 as viewed from the front, and the user operates the image forming apparatus from the front of the apparatus.

  The image forming unit 201B, which is an image forming unit, is of a four-drum full color type, and includes a laser scanner 210 and toner images of four colors of yellow (Y), magenta (M), cyan (C), and black (K). The four process cartridges 211 are formed. Here, each process cartridge 211 includes a photosensitive drum 212, a charger 213 as a charging unit, and a developing unit 214 as a developing unit. The image forming unit 201 </ b> B includes an intermediate transfer unit 201 </ b> C disposed above the process cartridge 211 and a fixing unit 220.

  The intermediate transfer unit 201C includes an intermediate transfer belt 216 wound around a driving roller 216a and a tension roller 216b. A primary transfer roller 219 that contacts the intermediate transfer belt 216 at a position facing the photosensitive drum 212 is provided inside the intermediate transfer belt 216. Here, the intermediate transfer belt 216 is rotated in the direction of the arrow by a driving roller 216a driven by a driving unit (not shown). Then, each color toner image having negative polarity on the photosensitive drum is sequentially transferred to the intermediate transfer belt 216 by the primary transfer roller 219.

  A secondary transfer roller 217 for transferring a color image formed on the intermediate transfer belt to the sheet P is provided at a position facing the driving roller 216a of the intermediate transfer unit 201C. Further, a fixing unit 220 is disposed above the secondary transfer roller 217, and a first discharge roller pair 225a, a second discharge roller pair 225b, a reverse roller pair 222, and a re-conveying path are disposed on the upper left side of the fixing unit 220. A double-sided inversion unit 201D including Ra and the like is disposed.

  The sheet feeding unit 230 includes a pickup roller 8 that feeds the sheet P stored in the sheet feeding cassette 233, a feed roller 9 for separating the sheet P fed from the pickup roller 8, and a retard roller 10. And a separation unit. In the present embodiment, the sheet feeding unit 230 is arranged in four stages in the vertical direction.

  A manual sheet feeder 300 for manually feeding the sheet P is provided on the side surface of the apparatus main body 201 </ b> A of the image forming apparatus 201. The manual sheet feeding unit 300 includes a pickup roller 16 that is a sheet feeding unit, and a separation unit that includes a feed roller 17 and a retard roller 18 for separating the sheet P fed from the pickup roller 16. Yes. The image forming operation, the sheet feeding operation, and the like are controlled by the control unit (control unit) 260. Further, the toner is stored in the toner cartridge 215.

  Next, an image forming operation of the image forming apparatus 201 will be described. First, when image information of a document is read by the image reading device 202, the image information is subjected to image processing, converted into an electrical signal, and transmitted to the laser scanner 210 of the image forming unit 201B. In the image forming unit 201 </ b> B, the surface of the photosensitive drum 212 whose surface is uniformly charged to a predetermined polarity and potential by the charger 213 is sequentially exposed by laser light. As a result, yellow, magenta, cyan, and black electrostatic latent images are sequentially formed on the photosensitive drums of the process cartridges 211, respectively.

  Thereafter, the electrostatic latent image is developed and visualized with each color toner, and each color toner image on each photoconductive drum is sequentially superimposed on the intermediate transfer belt 216 by the primary transfer bias applied to the primary transfer roller 219. Transfer together. As a result, a toner image is formed on the intermediate transfer belt 216. The toner remaining on the photosensitive drum 212 after the toner image transfer is removed by a cleaner (not shown).

  In parallel with the toner image forming operation, the sheet P is sent out from the pickup rollers 8 and 16 provided in the sheet feeding unit 230 and the manual sheet feeding unit 300. The fed sheet P is separated and conveyed one by one by a separation unit including the feed rollers 9 and 17 and the retard rollers 10 and 18, arrives at the registration roller pair 240, and is inclined by the registration roller pair 240. The line is corrected.

  After the skew is corrected, the sheet P is conveyed to the secondary transfer unit by the registration roller pair 240, and the toner image is transferred to the sheet by the secondary transfer bias applied to the secondary transfer roller 217 in the secondary transfer unit. Transferred onto P in batch. Next, the sheet P to which the toner image has been transferred is conveyed to the fixing unit 220, and the toner of each color is melted and mixed by receiving heat and pressure in the fixing unit 220, and is fixed on the sheet P as a color image. Thereafter, the sheet P on which the image is fixed is discharged into the discharge space S by the first discharge roller pair 225a or the second discharge roller pair 225b provided downstream of the fixing unit 220, and protrudes to the bottom surface of the discharge space S. It is loaded on the loading unit 223.

  As described above, when an image is formed on one side of the sheet P, the sheet P passes through the conveyance path F from the sheet feeding unit 230 or the manual sheet feeding unit 300 to the first discharge roller pair 255a or the second discharge roller pair 255b. Then, it is discharged and loaded on the loading unit 223. When images are formed on both sides of the sheet P, after the image is fixed, the sheet P is conveyed to the re-conveying path Ra by the reversing roller pair 222 provided in the double-side reversing unit 201D, and again, the image forming unit It is conveyed to 201B.

  By the way, on one vertical side wall surface of the apparatus main body 201A, a transport door 11 as a door is openable and closable (rotatable) in the vertical direction around a rotation shaft 12 disposed horizontally along the side wall surface. It is pivotally supported. The manual sheet feeding unit 300 includes a manual tray 13 on which sheets P are stacked. The manual tray 13 serving as an opening / closing member is attached to the conveyance door 11 by a rotation shaft 14 that is disposed in the conveyance door 11 in the horizontal direction. On the other hand, it is supported so that it can be opened and closed (rotated) in the vertical direction. When the transfer door 11 and the manual feed tray 13 are closed with respect to the apparatus main body 201A, they are flush with the side wall surface provided vertically on the apparatus main body 201A.

  When the sheet is fed from the manual sheet feeder 300, the manual tray 13 as a sheet stacking unit is closed from the conveyance door 11 as shown in FIG. ) To the stackable position, which is an open position where the sheets can be placed. The stackable position is a position where the manual feed tray 13 is rotated from an upright position to an angle η at which the rotation end of the manual feed tray 13 is above the rotation shaft 14. Thus, when the stacking position is opened to the stacking position, the manual feed tray 13 is held at the stacking position by a link 15 that is a holding member that is rotatably provided at one end of the transport door 11.

  Further, the transport door 11 is opened when cleaning or exchanging parts inside the apparatus main body or when removing a sheet in which a jam has occurred in the transport path F. When removing the jammed sheet, the conveyance door 11 is engaged with an arm 21 provided on the apparatus main body 201A and a guide 22 provided on the conveyance door 11 as shown in FIG. The first opening angle α is maintained from the vertical state. Further, in the case of parts replacement or cleaning, as shown in FIG. 3B, the engagement between the guide 22 and the arm 21 in a state different from the case where the jammed sheet is removed causes the second direction from the vertical direction. It is held at the opening angle β (> α). In this embodiment, α is set to 45 ° and β is set to 80 °.

  Here, when the conveyance door 11 is opened in a state where the sheets P are stacked on the manual feed tray 13, the inclination angle of the manual feed tray 13 whose lower end is supported by the conveyance door 11 with respect to the apparatus main body 201 </ b> A increases. There is a risk of the sheet falling. Therefore, in the present embodiment, as shown in FIG. 2B, the other end of the wire 6 that is a flexible long member whose one end is supported on the apparatus main body side is attached to the manual feed tray 13. The manual feed tray 13 is pulled by the wire 6. Thereby, even if the conveyance door 11 is opened, the opening angle of the manual feed tray 13 is set to the angle θ shown in FIG. 3A and the rotation end of the manual feed tray 13 above the rotation shaft 12 and FIG. The sheet can be held at an angle ζ as shown in FIG. Here, “flexibility” means that it is difficult to extend in the longitudinal direction and is easily deformed in a direction crossing the longitudinal direction.

  As shown in FIGS. 2 and 3, one end of the wire 6 is supported by a pulley unit 1 which is a buffer means provided in the apparatus main body 201A. Here, the pulley unit 1 is for alleviating an impact when the manual feed tray 13 is moved to the stackable position, and FIG. 4A is a perspective view of the pulley unit 1. Then, the pulley unit 1 has one end of the wire 6 attached thereto and the wire 6 wound so as to be rewound and unwound, as shown in FIG. 4B with the cover 5 removed from FIG. 4A. A pulley 2 which is a rotating member. Further, the pulley unit 1 includes a holder 4 that rotatably supports the pulley 2. The pulley 2 is rotatably supported by a shaft 4 a that extends in a direction perpendicular to the winding and unwinding direction provided in the holder 4.

  In addition, as shown in FIG. 4C, the pulley unit 1 has one end 3a engaged with the inner peripheral surface of the pulley 2 and the other end 3b engaged with the shaft 4a of the holder 4, and the pulley 2 is connected to the wire 6. There is provided a spring 3 that is energized in the winding direction. The pulley 2 and the spring 3 constitute a winding means 1A shown in FIG. In addition, in FIG.4 (c), illustration of the side wall surface of the pulley 2 is abbreviate | omitted.

  When the pulley unit 1 is assembled, first, the mainspring 3 is set in a state where one end 3a is locked to the inner peripheral surface of the pulley 2, and one end of the wire 6 is locked to the locking portion 2c of the pulley 2. In this state, the wire 6 is wound around the outer periphery of the pulley 2. Next, while the other end 3b on the inner side of the spring 3 is engaged with the holding portion 4b formed on the shaft 4a of the holder 4 shown in FIG. 4C, the pulley as shown in FIG. 2 is attached to the shaft 4 a of the holder 4.

  Next, the cover 5 is attached as shown in FIG. Thereafter, the pulley unit 1 is attached to the apparatus main body 201A by fixing the holder 4 to the apparatus main body 201A. After the pulley unit 1 is attached, the wire 6 is unwound from the pulley unit 1, and the wire 6 is attached to the wire fulcrum 11a provided on the transfer door 11 as shown in FIG. It is attached to the wire holding part 13a provided in the manual feed tray 13 via the via.

  Next, the operation when the manual feed tray 13 of the pulley unit 1 configured as described above is opened and closed will be described. FIG. 5A shows a state in which the spring 6 is wound up in the pulley 2 and thus the rotational torque T is not generated, so that the wire 6 is wound up. When the manual feed tray 13 is opened, the wire 6 is unwound while rotating the pulley 2 together with the manual feed tray 13. When the pulley 2 rotates, the spring spring 3 in a relaxed state is wound inward as shown in FIG. Along with this, a torque T is generated by the mainspring spring 3 to rotate the pulley 2 in the direction of the arrow C shown in FIG. 5B, thereby causing a force to rewind the wire 6 around the pulley 2. Occur.

In the present embodiment, the relationship between the distance L around which the wire 6 is unwound and the force (wire winding force) T for rewinding the wire 6 around the pulley 2 is as shown in FIG. That is, the wire 6 until unwound only La rises abruptly torque T _s generated by the spiral spring 3 is also rapidly increases the wire wind-up force T accordingly. While the wire 6 is unwound from La to Lb, the torque Ts generated by the mainspring 3 is stably increased, and during that time, the wire winding force T is increased by a substantially constant increase amount. When the wire 6 is unwound longer than Lb, the torque T _s generated by the mainspring spring 3 rapidly increases again, so that the wire return force T also increases rapidly.

  The wire 6 unwound from the pulley unit 1 is held by the wire holding portion 13a of the manual feed tray 13 as described above. The wire holding portion 13a is in a state where the manual feed tray 13 is closed. The pulley unit 1 is positioned above the pulley unit 1. When the wire holding portion 13a is in such a position, the unwinding amount (distance) L of the wire 6 is L1 (first length) larger than La as shown in FIG.

  When the manual feed tray 13 is opened as shown in FIG. 2B, the unwinding amount (distance) L of the wire 6 is larger than L1 (second) as shown in FIG. Length). Further, when the conveyance door 11 is opened to the opening angle α as shown in FIG. 3A with the manual feed tray 13 open, the unwinding amount of the wire 6 is L2 as shown in FIG. 2B. Therefore, L3 shown in FIG. 3A is smaller than Lb shown in FIG.

  That is, in the present embodiment, the relationship between L1, L2, and L3 is L1 <L2 <L3. At this time, L3 (third length) is the maximum length at which the wire 6 can be unwound. By setting the unwinding amounts L1, L2, and L3 between La and Lb in this way, the amount of change in the wire winding force with respect to the wire unwinding distance L can be stabilized.

  As shown in FIG. 3A, when the conveyance door 11 is opened with the manual feed tray 13 being opened, the manual feed tray 13 is also rotated downward. However, since the wire return force T acts on the manual feed tray 13 at this time, the manual feed tray 13 rotates downward separately from the conveyance door 11 while unwinding the wire 6. As a result, the relative angle of the manual feed tray 13 with respect to the transport door 11 is reduced. As a result, when the transport door 11 is opened to the opening angle α, the manual feed tray 13 is not supported by the link 15 and is unwound. Supported by the wire 6.

  At this time, even if the unwinding amount of the wire 6 becomes L3, in this embodiment, L3 lowers the manual feed tray 13 on the shaft support side, that is, on the rotating shaft 14 side rather than the rotating end (moving end) side. The length is set to be an angle θ (> α). Also, as shown in FIG. 3 (b), even when the transport door 11 is opened to the opening angle β, the manual feed tray 13 is not substantially horizontal by the wire 6 unwound by a length shorter than the maximum length L3. It is held at an angle ξ (> β) at which the rotating shaft 14 side is lowered. Thereby, even when the conveyance door 11 is opened in a state where the manual feed tray 13 is opened, the sheet on the manual feed tray 13 does not fall.

Next, the force applied to the manual feed tray 13 when the manual feed tray 13 is opened will be described. When the manual feed tray 13 is opened with the transport door 11 closed, the manual feed tray 13 is urged in the opening direction by its own weight. In addition, an assist spring for assisting the opening / closing operation may be provided in the manual feed tray 13 so that the elastic force works when opening or closing. At this time, as shown in FIG. 7, the wire holding portion 13a of the manual feed tray 13 has an opening direction component m _r generated by its own weight m or the like (including any elastic force when there is an assist spring). The power of work.

Also, the wire holding portion 13a, acts rotational direction component R _r of sliding resistance R caused rotation shaft 14 when opening the manual feed tray 13. Further, the wire holding portion 13a is provided with a rotation direction component _Tr of the wire winding force T that urges the manual feed tray 13 against the force generated in the opening direction of the manual feed tray 13, such as its own weight, by the mainspring spring 3. Power works. Here, when the relationship between the opening direction component _mr and the force of the wire winding force T in the rotation direction component _Tr is _expressed by the following Equation 1, the manual feed tray 13 does not naturally open from that state.
m _r <T _r + R _r Formula 1

Furthermore, the opening direction component m _r, manual feed tray 13 when the relationship between the force in the rotational direction component T _r of the wire wind-up force T becomes relationship equation 2 below opens naturally by its own weight.
m _r > T _r + R _r Formula 2

Further, the boundary point at which the manual feed tray 13 does not open naturally is expressed by the following Equation 3.
m _r = T _r + R _r Formula 3

Note that it is desirable that the manual feed tray 13 does not open due to its own weight or the like, and the angle of balance is as small as possible. When the angle is large balanced, manual feed tray 13 is closer to the angle η held shown in (b) of FIG. 2, incorrectly user correctly opened manual tray 13 loaded with the sheet, the print jobs or perform copying operation May be thrown in. In this case, the sheet P may not be fed correctly and may jam or an image may not be formed correctly.

Further, the rotation direction component T _r of the wire wind-up force T is gradually increased in accordance with the manual feed tray 13 is gradually opened, it is necessary to be less than the increase in the opening direction component m _r of the manual feed tray 13. Here, if the increment of the T _r than the increase in m _r is large, the relationship between the rotational direction of the force applied to the manual feed tray 13 is always in a state of Formula 1. In this case, there is a possibility that the user stacks sheets in a state where the manual feed tray 13 is not opened by its own weight or the like and the manual feed tray 13 is not correctly opened to the angle η.

  Here, when the weight m of the manual feed tray 13 is set so that such a relationship is established, even when the relationship of the force of the rotational direction component applied to the manual feed tray 13 shifts from Equation 3 to Equation 2, the manual feed tray The speed when opening 13 can be reduced. Thereby, it is possible to absorb an impact when the manual feed tray 13 is opened, and it is possible to suppress a sound at the time of stopping or to suppress a bounce of the manual feed tray 13.

On the other hand, when the pulley unit 1 is not used, the rotational direction component _Tr of the wire winding force T disappears. Therefore, the relationship between the rotational direction components of the force applied to the manual feed tray 13 is expressed by the following formulas 1 to 3. Equations 11 to 13 are obtained.
m _r <R _r Formula 11
m _r > R _r ... Formula 12
m _r = R _r Formula 13

  That is, since the component of the wire take-up force T disappears, the speed when the manual feed tray 13 is opened increases, and the manual feed tray 13 is suddenly stopped by the link 15 when the manual feed tray 13 is opened to the angle η. Or the manual feed tray 13 bounces. Further, since the wire 6 is not used, the angle of the manual feed tray 13 is always constant with respect to the conveyance door 11, and when the conveyance door 11 is opened while the sheet P is loaded on the manual feed tray 13, the sheet P falls.

  On the other hand, in order to generate the winding force T of the wire 6, when a tension spring that operates linearly as disclosed in Patent Document 1 is used, even if the manual feed tray 13 is opened, the spring constant becomes high. The relationship 1 may be maintained. However, in the present embodiment, the spring spring 3 is used, and the wire unwinding distance is set between unwinding distances La to Lb at which the spring constant becomes low. Therefore, the transition from Equation 1 to Equation 2 and Equation 3 is possible. It becomes.

  As described above, in the present embodiment, the manual feed tray 13 is resisted against the force in the opening direction generated in the manual feed tray 13 by the spring spring 3 through the wire 6 having one end attached to the manual feed tray 13. It is trying to be energized. Thereby, the impact at the time of opening the manual feed tray 13 can be relieved. Further, by using the mainspring spring 3 instead of the tension spring, the wire suspension structure is simplified, so that the assembly productivity is improved. Further, by using the spring 3, the space for storing the spring 3 can be narrowed, and an increase in the size of the image forming apparatus 201 can be prevented.

  Furthermore, even if the conveyance door 11 is opened with the sheet P loaded on the manual feed tray 13, the manual feed tray 13 can be maintained in the state where the rotary shaft 14 side is lowered by holding the manual feed tray 13 with the spring 3 so that the sheet can be maintained. P can be prevented from falling.

  In this embodiment, the wire 6 is used as a flexible long member, but as a flexible long member that is difficult to extend in the longitudinal direction and easily deforms in a direction intersecting the longitudinal direction. You may use a belt, a string, etc. In the above description, the case where the pulley unit 1 is provided in the apparatus main body 201 </ b> A has been described. However, the present invention is not limited thereto, and the pulley unit 1 may be provided in the manual feed tray 13. That is, one end of the wire is attached to one of the manual feed tray and the apparatus main body, and the pulley unit 1 is provided on the other of the manual feed tray and the apparatus main body, and the manual feed tray is biased against the weight of the manual feed tray through the wire. You may comprise so that it may do.

DESCRIPTION OF SYMBOLS 1 ... Pulley unit (buffer means), 1A ... Winding means, 2 ... Pulley (rotating member), 4 ... Holder, 6 ... Wire (long member), 11 ... Transfer door (door), 12 ... Rotating shaft, DESCRIPTION OF SYMBOLS 13 ... Manual feed tray (opening-closing member), 14 ... Rotating shaft, 15 ... Link (holding member), 201 ... Image forming apparatus, 201A ... Image forming apparatus main body, 201B ... Image forming part, 300 ... Manual paper feeding part, P ... Sheet

Claims (7)

A door supported so as to be openable and closable with respect to the apparatus main body around the first rotation axis;
A manual feed tray that is supported so as to be openable and closable with respect to the door around a second rotation axis, and on which sheets are stacked;
A feeding section for feeding sheets stacked on the manual feed tray;
An image forming unit that forms an image on the sheet fed by the feeding unit;
A wire having one end attached to the rotating member and wound around the rotating member so as to be unwound, the other end being attached to the manual feed tray via the door;
A spring that biases the rotating member in a direction in which the wire is wound ;
One end is connected to the manual feed tray and the other end is connected to the door, and includes a link for regulating an opening angle of the manual feed tray with respect to the door ,
When the manual feed tray is opened from the door with the door closed, the manual feed tray is held at a predetermined opening angle with respect to the door by the link, and the spring spring pulls the wire. By receiving the winding force according to the unwinding amount of the wire,
When the door is opened with respect to the apparatus main body in a state where the manual feed tray is opened with respect to the door at the predetermined opening angle, the predetermined opening angle with respect to the door by the unwound wire. Is closed at a smaller angle, and the moving end of the manual feed tray is held at an angle above the second rotation axis.
An image forming apparatus.   One end is connected to the door and the other end is connected to the apparatus main body, and includes an arm for regulating an opening angle of the door with respect to the apparatus main body.
  The image forming apparatus according to claim 1. When the door is closed with respect to the apparatus main body and the manual feed tray is closed with respect to the door , the wire is unwound by a first length L1, and the first length L1 , a second length L2 which said wire is unwound when the manual feed tray with the door is closed to the apparatus main body is opened at the predetermined angle of opening relative to said door, said manual feed tray When the door is opened with respect to the apparatus main body in a state where the wire is opened with respect to the door at the predetermined opening angle, the relationship of the third length L3 is L1 <L2 <L3 ,
The image forming apparatus according to claim 1 , wherein the image forming apparatus is an image forming apparatus. The third length L3 is the maximum length that the wire can unwind ,
The image forming apparatus according to claim 3 .   The door can be opened with respect to the apparatus main body to open a conveyance path provided in the apparatus main body.
  The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus.   The axial direction orthogonal to the winding direction of the mainspring spring is a direction along the width direction orthogonal to the feeding direction of the sheet fed by the feeding unit.
  The image forming apparatus according to claim 5.   A holder containing the rotating member and the spring spring;
  The holder is disposed outside the conveyance path in the width direction.
  The image forming apparatus according to claim 6.

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