JP2021147119A - Sheet discharge tray and electronic appliance comprising sheet discharge tray - Google Patents

Abstract

To provide a sheet discharge tray made such that a stopper is not obstructive in taking a sheet out of a discharge-surface unit while securing a function of damming the sheet by the stopper.SOLUTION: A sheet discharge tray comprises a discharge-surface unit onto which a sheet is discharged and a stopper 73 that is provided on the discharge-surface unit and dams the sheet discharged onto the discharge-surface unit. The stopper 73 is configured to displace to a rise position and to an inclination position, and the stopper 73 is urged by a stopper pressing mechanism A. The stopper pressing mechanism A, in a state the stopper 73 lies closer to a rise position than a neutral position, urges the stopper 73 toward the rise position by the pressing member 78 and, in state the stopper 73 lies closer to the inclination position than the neutral position, urges the stopper 73 toward the inclination position by the pressing member 78.SELECTED DRAWING: Figure 10

Description

The present invention is an electronic device including a seat discharge tray and a seat discharge tray.

Conventionally, a sheet discharge tray provided with a discharge surface portion on which a sheet is discharged and a stopper for blocking the sheet discharged on the discharge surface portion has been known (see, for example, Patent Document 1). In this sheet discharge tray, the stopper is erected on an extension tray that extends the discharge surface portion. The extension tray is supported by a support shaft whose upstream end in the transport direction extends in the sheet width direction (direction orthogonal to the transport direction). The extension tray is switched from a state in which the discharge surface portion is extended to a stored state by rotating the support shaft as a fulcrum to the upstream side in the sheet discharge direction.

JP-A-2010-0239332

However, the conventional sheet discharge tray shown in Patent Document 1 has a problem that when the sheet blocked by the stopper is taken out, the standing stopper becomes an obstacle and the workability of taking out the sheet is poor.

In order to avoid this problem, it is conceivable to fold the stopper into a retractable shape only when the sheet is taken out. However, in the conventional sheet discharge tray shown in Patent Document 1, when the stopper is folded, it is necessary to rotate the extension tray around the support axis toward the upstream side in the sheet discharge direction. Therefore, the sheet on the discharge surface portion that has already been loaded becomes an obstacle and the stopper cannot be folded.
Therefore, it is conceivable to configure the stopper so that it can lie down from the upright position to the downstream side in the seat discharge direction.

However, in this case, when the stopper is used in the upright position, the stopper may fall to the downstream side due to the impact received from the seat. It is conceivable to provide a lock mechanism so that the stopper does not fall, but in that case, there is a problem that it takes time and effort to operate the lock mechanism.

The present invention has been made in view of this point, and an object of the present invention is a sheet discharging device in which the stopper does not get in the way when the sheet is taken out from the discharging surface portion without impairing the function of blocking the sheet by the stopper. And to provide an electronic device equipped with the sheet ejecting device.

The sheet discharge tray according to the present invention includes a discharge surface portion on which a sheet is discharged, and a stopper provided on the discharge surface portion and blocking the sheet discharged to the discharge surface portion.

The stopper is supported by a support shaft extending in the seat width direction orthogonal to the seat discharge direction, and the support shaft is supported by an upright position that stands up against the discharge surface portion to block the seat and the support shaft from the upright position. As a fulcrum, it is configured to be displaceable at a tilted position that allows the seat to pass by lying down on the downstream side in the seat discharge direction, and has an urging member that imparts a rotational urging force around the support shaft to the stopper. Further, the stopper urging mechanism is further provided with a stopper urging mechanism capable of switching the direction of the rotational urging force by the urging member. In the state of being located on the upright position side, the urging member urges the stopper toward the upright position, and in the state where the stopper is located on the lodging position side of the neutral position, the urging The member is configured to urge the stopper toward the lodging position.

According to the present invention, there is provided a sheet discharge tray in which the stopper does not interfere when the sheet is taken out from the discharge surface portion without impairing the function of blocking the sheet by the stopper, and an electronic device provided with the sheet discharge tray.

FIG. 1 is an external perspective view showing an image forming apparatus equipped with an automatic document feeder (an example of an electronic device) having a sheet ejection tray according to the embodiment. FIG. 2 is a side view of the automatic document feeder as viewed from the front side, and is a view showing a sheet supply tray as a partial cross-sectional view. FIG. 3 is an enlarged perspective view showing the vicinity of the sheet ejection tray in the automatic document feeder in an enlarged manner, and is a diagram showing a state in which a stopper provided on an ejection surface portion is in an inverted position. FIG. 4 is a view corresponding to FIG. 2 showing a state in which the stopper is in the upright position. FIG. 5 is a perspective view showing the stopper urging mechanism and the rail plate, and is a diagram showing a state in which the stopper is in the inverted position. FIG. 6 is a perspective view showing the stopper urging mechanism and the rail plate, and is a diagram showing a state in which the stopper is in the upright position. FIG. 7 is a perspective view showing a state in which the cover member is removed in FIG. FIG. 8 is a side view of the inside of the stopper as viewed from the cover member side. FIG. 9 is an explanatory diagram for explaining the operation of the stopper urging mechanism, and is a diagram showing a state in which the stopper is in the upright position. FIG. 10 is an explanatory diagram for explaining the operation of the stopper urging mechanism, and is a diagram showing a state in which the stopper is in the neutral position. FIG. 11 is an explanatory diagram for explaining the operation of the stopper urging mechanism, and is a diagram showing a state in which the stopper is in the lodging position.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments.

<< Embodiment >>
FIG. 1 shows an image forming apparatus 1 equipped with an automatic document feeder 7 (an example of an electronic device) having a sheet ejection tray 72 according to an embodiment. The image forming apparatus 1 is a composite type image forming apparatus (multifunction device) having a scanner function, a fax function, and a copy function in addition to a printing function. In the following description, the front side and the rear side mean the front side and the rear side of the image forming apparatus 1, and the left side and the right side mean the left side and the right side when the image forming apparatus 1 is viewed from the front side. do.

The image forming apparatus 1 includes an image forming apparatus main body 2 and an image reading unit 3 arranged above the image forming apparatus main body 2. The image forming apparatus main body 2 has a printing unit 4 arranged in an intermediate portion in the vertical direction thereof, and a plurality of paper feed cassettes 5 arranged below the printing unit 4. Papers of different sizes are housed in each paper cassette 5. The printing unit 4 prints on the paper supplied from the paper cassette 5 based on predetermined image data. For example, an electrophotographic method is adopted as the printing method in the printing unit 4. That is, the printing unit 4 irradiates the surface of the photoconductor drum with a laser beam corresponding to the image data to form an electrostatic latent image, develops the electrostatic latent image with toner, and transfers the electrostatic latent image to paper. The paper after the image is printed by the printing unit 4 is discharged to the in-body paper ejection space S1 provided between the printing unit 4 and the image reading unit 3.

The image reading unit 3 optically reads an image of a document placed on a contact glass on the upper surface thereof. The upper surface of the image reading unit 3 is covered with a document holding cover 6 for holding the document so as to be openable and closable. The document holding cover 6 is integrated with the automatic document feeder 7. The automatic document feeder 7 transports a document (an example of a sheet) set in the sheet supply tray 71 along a predetermined transport path, passes the image reading position set on the contact glass, and then passes the sheet. Discharge to the discharge tray 72. An operation panel 8 is formed so as to protrude from the front surface of the image reading unit 3. The operation panel 8 is provided with an operation unit 9 including a numeric keypad and a start key, and a display unit 10 including a liquid crystal display.

[Structure of sheet discharge tray 72]
FIG. 2 is a side view of the automatic document feeder 7 viewed from the front side, and the sheet ejection tray 72 is shown as a partial cross-sectional view. FIG. 3 and FIG. 3 are enlarged views of the vicinity of the sheet eject tray 72 in the automatic document feeder 7. It is an enlarged perspective view shown by. In FIG. 3, some parts including the sheet supply tray 71 are omitted so that the entire sheet discharge tray 72 can be visually recognized.

The sheet ejection tray 72 is located on the right side of the case body 7b that accommodates the transport path of the automatic document feeder 7. A seat discharge port 7a is provided on the right side surface of the case body 7b. The sheet discharge tray 72 has a discharge surface portion 72a for receiving the sheet discharged from the sheet discharge port 7a, and a stopper 73 described later. On the discharge surface portion 72a, the sheets discharged from the sheet discharge port 7a are sequentially loaded. A space S2 (see FIG. 2) is secured between the discharge surface portion 72a and the sheet supply tray 71. The user can put his / her hand in the space S2 and take out the sheet on the discharge surface portion 72a.

The discharge surface portion 72a has a long rectangular shape in the left-right direction of the image forming apparatus 1 when viewed from above. In the example of the present embodiment, the left-right direction of the image forming apparatus 1 coincides with the sheet discharge direction in the discharge surface portion 72a, the left side corresponds to the upstream side in the sheet discharge direction, and the right side corresponds to the downstream side in the sheet discharge direction. Equivalent to.

As shown in FIGS. 2 and 3, the discharge surface portion 72a has an upstream side inclined surface 72b located on the upstream side in the sheet discharge direction and a downstream side flat surface 72c located on the downstream side. The upstream side inclined surface 72b is connected to the lower end edge of the right side surface of the case body 7b, and is inclined upward toward the downstream side in the sheet discharge direction. The downstream flat surface 72c is a horizontal flat surface and is connected to the downstream edge of the upstream inclined surface 72b. Sheets of normal size or smaller discharged from the sheet discharge port 7a are laminated within the range of the upstream inclined surface 72b, and the large size sheet straddles the upstream inclined surface 72b and the downstream flat surface 72c. Stacked.

[Structure of Stopper 73]
The stopper 73 blocks and aligns the sheets discharged to the discharge surface portion 72a, and is configured to be undulating with respect to the discharge surface portion 72a as shown in FIGS. 3 and 4.

The stopper 73 has a flat rectangular case shape, and is made of, for example, a resin member. The stopper 73 is arranged so that its width direction coincides with the sheet width direction (direction orthogonal to the sheet discharge direction). One of the pair of edge portions extending in the width direction of the stopper 73 is supported by the support shaft 100 (see FIG. 2). The stopper 73 is rotatable between an upright position (see FIG. 4) and an inverted position (see FIG. 3) with the support shaft 100 as a fulcrum. In the upright position, the stopper 73 abuts on the downstream end edge of the sheet discharged from the sheet discharge port 7a to block and align the sheet. The stopper 73 is accommodated in the stopper accommodating recess 72d formed in the discharge surface portion 72a in the inverted position. When the stopper 73 is in the inverted position, the upper surface of the stopper 73 is located below the sheet passing position on the discharge surface portion 72a (see FIG. 2). Therefore, when the stopper 73 is in the inverted position, the seat can pass through the upper surface of the stopper 73. By configuring the stopper 73 so that it can be switched between the upright position and the prone position in this way, the stopper 73 only needs to be upright when the user needs it, which improves convenience.

As shown in FIGS. 2 to 4, the stopper accommodating recess 72d is a rectangular parallelepiped recess that is long in the sheet discharge direction, and is provided at the center of the discharge surface portion 72a in the sheet width direction (direction orthogonal to the sheet discharge direction). Has been done. The stopper accommodating recess 72d is formed from the vicinity of the central portion of the upstream inclined surface 72b in the sheet discharging direction to the upstream end portion of the downstream flat surface 72c in the sheet discharging direction. The bottom wall surface of the stopper accommodating recess 72d is inclined upward toward the downstream side in the sheet discharge direction. The inclination angle of the bottom wall surface is smaller than the inclination angle of the upstream side inclined surface 72b.

A slider 76 for supporting the support shaft 100 is provided in the stopper accommodating recess 72d. The slider 76 is engaged with a rail plate 77 arranged with a slight gap with respect to the bottom wall surface of the stopper accommodating recess 72d. The slider 76 can slide along the rail plate 77 in the sheet discharge direction. The slider 76 is connected to the stopper 73 via the support shaft 100. Therefore, by adjusting the slide position of the slider 76, the position of the stopper 73 can be changed according to the seat size.

As shown in FIGS. 5 and 6, the slider 76 includes a rectangular base base 76a that is long in the seat width direction, a pair of upright plates 76b that stand up from both side ends of the base base 76a in the width direction, and a base base 76a. It has 76d (see FIG. 6) protruding from the upper surface of the above. Each upright plate 76b is formed in a substantially trapezoidal shape, and both ends of the support shaft 100 are rotatably supported by through holes 76f at the upper end of each upright plate 76b. The protruding portion 76d is located at the center of the base base 76a in the width direction and functions as a part of the stopper urging mechanism A described later.

The base base 76a has a slide groove 76c that penetrates from one end surface to the other end surface in the lateral direction (direction orthogonal to the longitudinal direction). The slide groove 76c is slidably fitted to the rail plate 77. The degree of fitting between the slide groove 76c and the rail plate 77 is preferably set so that the position of the slider 76 can be adjusted and the slider 76 does not move carelessly after the adjustment.

The stopper 73 has a notch K that allows the user to insert the fingers of the hand at the lodging position shown in FIG. When switching the stopper 73 from the prone position to the upright position, the user inserts a finger into the notch K and lifts the stopper 73 upward. Then, by rotating the stopper 73 until it comes into contact with a regulation member (not shown), the stopper 73 is switched to the upright position shown in FIG. On the contrary, when switching the stopper 73 in the upright position to the prone position, the stopper 73 may be rotated around the support shaft 100 to the right side in FIG.

As shown in FIG. 6, the stopper 73 has a flat case member 74 that opens to one side and a cover member 75 that is attached to the open side of the case member 74. As shown in FIGS. 7 and 8, between the case member 74 and the cover member 75, a compression coil spring 78 that applies a rotational urging force around the support shaft 100 to the stopper 73, and a compression coil spring 78 that rotates the stopper 73. A stopper urging mechanism A for switching the direction of the force is housed.

[Details of Stopper Biasing Mechanism A]
The stopper urging mechanism A assists the undulating operation of the stopper 73 by utilizing the urging force of the compression coil spring 78.

As shown in FIGS. 7 and 8, the compression coil spring 78 is housed in the spring accommodating space T provided on the side of the case member 74 opposite to the seat contact side. As shown in FIG. 8, the spring accommodating space T is a space surrounded by a pair of facing walls 74a and a pair of side walls 74b. The pair of facing walls 74a are arranged to face each other at intervals in a direction (vertical direction in FIG. 8) orthogonal to the width direction of the stopper 73. The pair of side walls 74b are arranged so as to face each other at intervals in the width direction of the stopper 73. A protruding plate 74e is provided between the pair of facing walls 74a in the spring accommodating space T. The projecting plate 74e is formed perpendicular to the sheet contact plate 74f of the case member 74, and is arranged parallel to the stopper width direction. The protruding plate 74e functions as a seat plate that abuts on one end surface of the compression coil spring 78. A contact member 79 is attached to the other end of the compression coil spring 78. The contact member 79 is constantly in contact with the protruding portion 76d of the slider 76 by receiving the urging force of the compression coil spring 78.

As shown in FIG. 8, the contact member 79 has a shaft portion 79a, a seat plate portion 79b, and a vertical plate 79c. The shaft portion 79a is inserted into the other end portion (lower end portion in FIG. 8) of the compression coil spring 78 to regulate its radial position. The seat plate portion 79b abuts on the other end surface of the compression coil spring 78 to form the seat surface. The vertical plate 79c is vertically connected to the lower surface of the seat plate portion 79b. The vertical plate 79c penetrates the notch 74d formed in one of the facing walls 74a. The end surface of the vertical plate 79c on the side opposite to the seat plate portion 79b side is a contact surface 79d that comes into contact with the protruding portion 76d (see FIG. 9) of the slider 76. The contact surface 79d is inclined upward toward the right side in FIG.

The protrusion 76d of the slider 76 has a quadrangular shape with sharply pointed corners 76g on the right side and the upper side when viewed from the front-rear direction (viewed from the vertical direction on the paper surface of FIG. 9). The corner portion 76g is formed by the upper end surface 76e and the right side surface 76h of the protruding portion 76d, and the corner portion 76g always comes into contact with the contact surface 79d of the contact member 79.

The upper end surface 76e of the protrusion 76d is inclined upward toward the right side of FIG. Further, the right side surface 76h of the protrusion 76d is slightly inclined with respect to the vertical plane so that the lower end position is located slightly to the right of the upper end position.
The protruding portion 76d is formed so that the axial center of the support shaft 100 of the stopper 73 passes through the upper end portion of the protruding portion 76d when viewed from the front-rear direction (vertical direction on the paper surface of FIG. 9).

[Explanation of operation of stopper urging mechanism A]
The operation of the stopper urging mechanism A when raising and lowering the stopper 73 will be described with reference to FIGS. 9 to 11. FIG. 9 shows a state in which the stopper 73 is in the upright position, FIG. 10 shows a state in which the stopper 73 is in the neutral position, and FIG. 11 shows a state in which the stopper 73 is in the down position.

When the stopper 73 is tilted to the right from the undulating position shown in FIG. 9, the contact surface 79d of the contact member 79 is in sliding contact with the corner portion 76g of the protrusion 76d, and is centered on the support shaft 100 together with the stopper 73. It moves in the clockwise direction of FIG. Along with this, the contact position of the contact member 79 with the corner portion 76g on the contact surface 79d is from one end side (right side in FIG. 9) to the other end side (left side in FIG. 9) of the contact surface 79d in the inclination direction. ) Moves relative to. This contact position is also the action position of the urging reaction force F acting on the contact member 79 from the compression coil spring 78.

Here, in the state where the stopper 73 is in the upright position (the state of FIG. 9), the action line of the urging reaction force F in the contact member 79 is on one side in the stopper thickness direction with respect to the axial center of the support shaft 100. It is offset. While the stopper 73 is rotated from the standing position to the neutral position described later, the offset state of the urging reaction force F to the one side is maintained. Therefore, while the stopper 73 goes from the upright position to the neutral position, the urging moment M1 in the counterclockwise direction of FIG. 9 acts on the stopper 73 with the support shaft 100 as a fulcrum.

When the stopper 73 reaches the neutral position shown in FIG. 10, the point of action of the urging reaction force F of the compression coil spring 78 in the contact member 79 changes, so that the line of action of the urging reaction force F becomes the line of action of the support shaft 100. It will not be offset with respect to the axis. In other words, the line of action of the urging reaction force F passes through the axis of the support shaft 100. Therefore, when the stopper 73 is in the neutral position, the urging moment by the compression coil spring 78 does not act on the stopper 73.

When the stopper 73 is tilted further to the right from the neutral position, as shown in FIG. 11, the point of action of the urging reaction force F of the compression coil spring 78 in the contact member 79 changes, so that the urging reaction force F The line of action is offset from the axis of the support shaft 100 to the other side in the stopper thickness direction (the side opposite to the case where the stopper 73 is in the upright position). Therefore, while the stopper 73 goes from the neutral position to the lodging position, the urging moment M2 in the clockwise direction of FIG. 11 acts on the stopper 73 with the support shaft 100 as a fulcrum.

Therefore, when tilting the stopper 73 (see FIG. 9) in the upright position to the right, if the stopper 73 is tilted to the neutral position (see FIG. 10), then the compression coil spring 78 acts on the stopper 73 clockwise. The urging moment M2 in the direction automatically rotates the stopper 73 to the lodging position (see FIG. 11). Further, when raising the stopper 73 (see FIG. 11) in the inverted position, if the stopper 73 is raised to the neutral position (see FIG. 10), then the compression coil spring 78 acts on the stopper 73 in a counterclockwise direction. The urging moment M1 in the direction automatically rotates the stopper 73 to the upright position (see FIG. 9). Therefore, the user can easily perform the undulating operation of the stopper 73 as compared with the case where the stopper urging mechanism A is not provided.

[Action and effect of this embodiment]
As described above, in the seat discharge tray 72 of the present embodiment, the stopper 73 is supported by the support shaft 100 extending in the seat width direction orthogonal to the seat discharge direction, and stands up against the discharge surface portion 72a. It is configured to be displaceable between an upright position that dams up the seat and an overturned position that lies downstream from the upright position with the support shaft 100 as a fulcrum in the sheet discharge direction. The seat discharge tray 72 has a stopper 73 and a compression coil spring 78 (an example of an urging member) that applies a rotational urging force around the support shaft 100 to the stopper 73, and the rotational urging force of the compression coil spring 78. It is further provided with a stopper urging mechanism A capable of switching the direction of. In the stopper urging mechanism A, when the stopper 73 is located on the upright position side of the neutral position between the upright position and the lodging position, the stopper 73 is attached toward the upright position by the compression coil spring 78. In a state where the stopper 73 is positioned closer to the lodging position than the neutral position, the compression coil spring 78 is configured to urge the stopper 73 toward the tilting position.

According to this configuration, when the stopper 73 is switched from the upright position to the lying position, the stopper 73 may be rotated to the downstream side in the seat discharge direction, so that the stopper 73 is in the seat discharge direction on the side where the seat exists. The sheet can be taken out more easily than when it is rotated to the upstream side of the sheet. In particular, when the sheet is taken out from the downstream side (right side) of the discharge surface portion 72a, the stopper 73 becomes an obstacle as compared with the case where the sheet is taken out from the front side, so this configuration is particularly useful.

Further, in the above configuration, when the stopper 73 is in the upright position, the urging force of the compression coil spring 78 acts on the side where the stopper 73 is upright by the stopper urging mechanism A. Therefore, when the stopper 73 is used in the upright position, the stopper 73 does not fall due to the impact from the seat. Further, as described above, by providing the stopper urging mechanism A, the undulating operation of the stopper 73 is facilitated, so that the operation load of the stopper 73 when the user takes out the sheet from the discharge surface portion 72a can be reduced. can.

Further, in the present embodiment, the portion of the discharge surface portion 72a where the stopper 73 is provided is provided by the protruding portion 76d via the slider 76. The stopper urging mechanism A is provided on the stopper 73, and is provided on the stopper 73 and the compression coil spring 78 provided so as to be expandable and contractible in a direction orthogonal to the support shaft 100 in the stopper 73 (vertical direction in FIG. 9). It has a protruding plate 74e (an example of a seating surface portion) with which one end of the compression coil spring 78 contacts, and a contact member 79 mounted on the other end of the compression coil spring 78. Then, in the stopper urging mechanism A, as the stopper 73 rotates around the support shaft 100, the contact member 79 is in sliding contact with the corner portion 76 g (position example of the contacted portion) of the protruding portion 76d while supporting the support pin. It is configured to rotate 100 times and change the contact position of the contact member 79 with the corner portion 76 g to switch the direction of the rotational urging force by the compression coil spring 78.

According to this configuration, the rotation urging direction of the stopper 73 can be switched with a simple mechanical configuration without using an electric actuator such as a motor.

Further, in the present embodiment, the stopper 73 and the stopper urging mechanism A are supported by the slider 76, and the slider 76 is slidably attached to the discharge surface portion 72a in the sheet discharge direction.

According to this configuration, the position of the slider 76 can be adjusted to change the position of the stopper 73 according to the seat size. Further, since not only the stopper 73 but also the stopper urging mechanism A is attached to the slider 76, even if the position of the stopper 73 is changed, the function of switching the rotation urging direction of the stopper 73 by the stopper urging mechanism A is maintained. Will be done.

Further, in the present embodiment, the automatic document feeder 7 has a sheet supply tray 71, and after performing an automatic transfer process (an example of a predetermined process) for passing the reading position through the sheet, the sheet is transferred. It is configured to discharge to the sheet discharge tray 72.

According to this configuration, there is provided an automatic document feeder 7 in which the stopper 73 does not get in the way when the sheet is taken out without impairing the sheet damming function of the stopper 73.

<< Other Embodiments >>
In the above-described embodiment, the automatic document feeder 7 has been described as an example of the electronic device to which the sheet ejection tray 72 is applied, but the present invention is not limited to this, and the electronic device may, for example, perform an image forming process on the sheet. It may be the image forming apparatus 1 to carry out, or the post-processing apparatus which carries out post-processing such as perforation processing.

As described above, the present invention is useful for a seat discharge tray and an electronic device provided with the seat discharge tray.

7: Automatic document feeder (electronic device)
72: Sheet discharge tray 72a: Discharge surface 73: Stopper 76: Slider 78: Compression coil spring (urging member)
79: Contact member 100: Support shaft A: Stopper urging mechanism

Claims (4)

A sheet discharge tray provided with a discharge surface portion from which a sheet is discharged and a stopper provided on the discharge surface portion to block the sheet discharged to the discharge surface portion.
The stopper is supported by a support shaft extending in the seat width direction orthogonal to the seat discharge direction, and stands up against the discharge surface portion to block the seat, and the support shaft is used as a fulcrum from the standing position. It is configured so that it can be displaced to a tilted position that allows the seat to pass by lying down on the downstream side in the seat discharge direction.
It has an urging member that applies a rotational urging force around the support shaft to the stopper, and further includes a stopper urging mechanism that can switch the direction of the rotational urging force by the urging member.
In the stopper urging mechanism, when the stopper is located on the standing position side of the neutral position between the standing position and the lodging position, the urging member directs the stopper to the standing position. In a state where the stopper is located closer to the lodging position than the neutral position, the seat is configured to urge the stopper toward the lodging position by the biasing member. Discharge tray. In the sheet discharge tray according to claim 1,
A contacted portion is provided at a portion of the discharge surface portion where the stopper is provided.
The stopper urging mechanism includes a compression coil spring as the urging member provided on the stopper and stretchably provided in a direction orthogonal to the support axis of the stopper, and a compression coil spring provided on the stopper. It has a seat surface portion to which one end abuts, and a contact member attached to the other end of the compression coil spring, and the contact member causes the contact member to rotate as the stopper rotates around the support shaft. The direction of the rotational urging force is switched by rotating around the support shaft while sliding in contact with the contacted portion and changing the contact position of the contact member with the contacted portion. The sheet discharge tray that is configured. In the sheet discharge tray according to claim 1 or 2.
A sheet discharge tray that supports the stopper and the stopper urging mechanism, and further includes a slider that is slidably attached to the discharge surface portion in the sheet discharge direction. The sheet discharging tray according to any one of claims 1 to 3 is provided.
An electronic device configured to eject the sheet to the sheet ejection tray after performing a predetermined treatment on the sheet.

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