JP7259492B2 - Sheet discharge device and image forming device - Google Patents

Description

The present invention relates to a sheet discharge device having a discharge stopper and an image forming apparatus having the same.

2. Description of the Related Art Conventionally, there is known an image forming apparatus having a discharge stopper on a discharge tray to prevent discharged sheets from falling out of the apparatus. For example, Patent Literature 1 discloses a configuration that pushes an ejection stopper in a raised position forward to further rotate it against the biasing force of a spring. Such a configuration is particularly effective as a countermeasure against narrowing of the opening for taking out the sheets in a so-called internal discharge type image forming apparatus in which the upper part of the discharge tray is covered with a document reading device or the like.

JP 2018-165204 A

However, according to the configuration of Patent Document 1, the biasing force of the spring acts in the opposite direction when the discharge stopper is raised, so the discharge stopper must be operated against the biasing force of the spring. There is room for improvement in terms of performance.

SUMMARY OF THE INVENTION An object of the present invention is to improve the operability of raising the ejection stopper in a sheet ejection device having an ejection stopper that can be rotated beyond the raised position. Another object of the present invention is to provide an image forming apparatus equipped with the sheet discharging device.

The sheet discharge device of the present invention is capable of swinging about a first rotation axis (R1) and a discharge tray (25) that supports a sheet (S) discharged by a discharge roller (241), A first position to be stored in the discharge tray (25), a second position to stand up from the first position and regulate the discharged sheet (S), and a position opposite to the first position across the second position. The discharge stopper (61) swinging between the side third position and the discharge stopper (61) at the first position not in contact with the discharge stopper (61) at the second position a holding member (62) displaceable between a fourth position where it abuts against and holds the discharge stopper (61) and a fifth position where it abuts against the discharge stopper (61) at the third position; a spring (64) that biases the holding member (62) from the fifth position toward the fourth position; and a regulating member (63) for regulating the position.

According to the present invention, the restricting member restricts the holding member to the fourth position, so that the ejection stopper is not biased by the spring between the first position and the second position. Therefore, it is not necessary to operate against the biasing force of the spring when raising the ejection stopper from the first position to the second position, and the operability is improved. Further, even when the user pushes the ejection stopper from the second position to the third position to take out the sheet, the ejection stopper automatically returns from the third position to the second position by the biasing force of the spring. .

1 is a perspective view of an image forming apparatus according to one embodiment; FIG. 1 is a schematic side view showing an outline of an internal configuration of an image forming apparatus according to one embodiment; FIG. FIG. 4 is an enlarged plan view of the vicinity of the stopper portion when the discharge stopper is at the first position; FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3; 4 is a cross-sectional view taken along the line BB of FIG. 3; FIG. FIG. 9 is an enlarged plan view of the periphery of the stopper portion when the discharge stopper is at the second position; FIG. 7 is a cross-sectional view taken along line CC of FIG. 6; FIG. 10 is an enlarged plan view of the periphery of the stopper portion when the discharge stopper is at the third position; FIG. 9 is a cross-sectional view taken along line DD of FIG. 8;

In the following description, the state in which the image forming apparatus 1 is installed for use as shown in FIG. The left and right directions are defined as viewed from the top, the second housing 3 side of the image forming apparatus 1 is defined as the upper side, and the first housing 2 side is defined as the lower side. In the present embodiment, the left-right direction is an example of the width direction perpendicular to the sheet discharge direction of the discharge roller 241 .

[Overall Configuration of Image Forming Apparatus]
FIG. 1 is a perspective view of an image forming apparatus 1 according to one embodiment of the invention. FIG. 2 is a schematic side view showing the outline of the internal configuration of the image forming apparatus 1. As shown in FIG. The image forming apparatus 1 includes a first housing 2 , a second housing 3 , a document holder 4 and an ADF (auto document feeder) 5 .

The first housing 2 is a substantially rectangular parallelepiped housing. As shown in FIG. 2, the first housing 2 includes a sheet tray 21 for storing sheets S, a transport mechanism 22 for transporting sheets S from the sheet tray 21, and a sheet S transported by the transport mechanism 22. An image forming unit 23 that forms an image and a discharge mechanism 24 that discharges the sheet S from the image forming unit 23 to the outside of the first housing 2 are accommodated. The transport mechanism 22 and the discharge mechanism 24 are configured by arranging a plurality of pairs of rollers, and a discharge roller 241 for discharging the sheet S to the discharge tray 25 is arranged at the most downstream portion of the discharge mechanism 24 . The configuration of the image forming unit 23 is not particularly limited, and configurations such as an electrophotographic system, an inkjet system, and a thermal head system can be used.

The image forming apparatus 1 has a form called a so-called internal paper discharge type. The upper surface of the first housing 2 is recessed, and a discharge tray 25 is formed having a sheet support surface 25A that slopes upward while curving from the rear side to the front side. The sheet support surface 25A is a surface that supports the sheet S discharged by the discharge mechanism 24. As shown in FIG. Further, the discharge tray 25 is provided with a stopper portion 6 that aligns the discharged sheet S and regulates the downstream end portion of the sheet S in the discharge direction so that the sheet S does not fall out of the apparatus. The ejection mechanism 24, the ejection tray 25, and the stopper portion 6 are an example of a sheet ejection device.

A sheet outlet 26 is formed between the front upper surface of the first housing 2 and the front lower surface of the second housing 3 . Then, the sheet S on which the image is formed is discharged from the rear side to the front side to the discharge tray 25 by the discharge mechanism 24 .

The second housing 3 is a substantially rectangular parallelepiped housing, and is provided above the first housing 2 so as to cover the upper surface of the first housing 2 . The rear end of the second housing 3 is vertically rotatably connected to the rear end of the first housing 2 by a hinge 11 having a horizontal rotation axis. Thereby, the second housing 3 is rotatable with respect to the first housing 2 between a closed position covering the upper surface of the first housing 2 and an open position opening the upper surface of the first housing 2. is.

The second housing 3 has an operation unit 31 such as a touch panel and operation buttons on its inclined front upper surface. A document supporting surface 32 such as a platen glass for supporting the document is arranged on the upper surface of the second housing 3 . The second housing 3 accommodates an image reading section 33 for reading an image from a document supported on the document support surface 32 .

The image reading unit 33 has a so-called flatbed type configuration. The image reading unit 33 includes an image sensor for reading an image and a driving mechanism for driving the image sensor. As the image sensor, for example, a line-type sensor in which a plurality of photodiodes are arranged in a row in the front-rear direction can be used. The drive mechanism is composed of a motor, a plurality of gears, etc., and moves the image sensor in the left-right direction. As a result, the image reading section 33 can read the document supported on the document support surface 32 while moving the image sensor.

The document holder 4 is a substantially rectangular parallelepiped housing, and is provided above the second housing 3 so as to cover the upper surface of the second housing 3 . A rear end portion of the document holder 4 is connected to a rear end portion of the second housing 3 by a hinge 12 having a rotation shaft parallel to the hinge 11 so as to be vertically rotatable. Thereby, the document presser 4 is rotatable with respect to the second housing 3 between a closed position covering the document supporting surface 32 and an open position opening the document supporting surface 32 .

The ADF 5 is provided above the document presser 4 . The ADF 5 includes a document supply tray 51 and a transport mechanism 52 that transports the document supported by the document supply tray 51 , passes over the image sensor, and discharges the document onto the document discharge tray 53 on the upper surface of the document presser 4 . there is As a result, the image reading unit 33 can automatically read a plurality of originals one by one. Further, as shown in FIG. 1, the document ejection tray 53 is provided with a stopper portion 54 that aligns the ejected documents and regulates the downstream end in the ejection direction of the documents so that the documents do not fall out of the apparatus. .

In the image forming apparatus 1 having such a configuration, the user can lift the front end portion of the document retainer 4 to open the document retainer 4 and place the document on the document support surface 32 . Also, the user can automatically read a plurality of documents by placing the documents on the document supply tray 51 of the ADF 5 .

Further, by keeping the stopper portion 6 of the discharge tray 25 in an upright state, it is possible to align the sheets S discharged to the discharge tray 25 and to prevent the sheets from falling. Furthermore, by keeping the stopper portion 54 of the document ejection tray 53 in an upright state, the documents ejected onto the document ejection tray 53 can be aligned and prevented from falling.

[Structure of stopper part]
3 is an enlarged plan view of the vicinity of the stopper portion 6 when the ejection stopper 61 is at the first position, FIG. 4 is a cross-sectional view along AA in FIG. 3, and FIG. 5 is a cross-sectional view along BB in FIG. be. 6 is an enlarged plan view of the vicinity of the stopper portion 6 when the discharge stopper 61 is at the second position, and FIG. 7 is a cross-sectional view taken along line CC of FIG. 8 is an enlarged plan view of the periphery of the stopper portion 6 when the discharge stopper 61 is at the third position, and FIG. 9 is a cross-sectional view taken along line DD of FIG.

The stopper portion 6 of the ejection tray 25 has a concave portion 251 , an ejection stopper 61 , a holding member 62 , a regulating member 63 , a spring 64 and a contact member 65 .

<Concave>
The concave portion 251 is provided substantially at the central portion of the front end portion of the discharge tray 25 . As shown in FIGS. 3 to 5, the concave portion 251 has a substantially rectangular shape in plan view, and is sized to accommodate the ejection stopper 61 substantially flush with the sheet supporting surface 25A. A support projection 252 and a hole 253 are provided in the recess 251 .

The support projection 252 is provided in the vicinity of the rear end portion of the left-right center of the concave portion 251, and is a projection that supports the pivoting tip portion of the retracted discharge stopper 61. As shown in FIG. The position and shape of the support projection 252 are not particularly limited as long as they can support the retracted ejection stopper 61 . The hole portion 253 is a substantially rectangular through-hole provided in the vicinity of the front end portion of the left-right center of the recess portion 251 and penetrating in the up-down direction. The upper portion of the holding member 62 protrudes upward through the hole 253 .

<Ejection stopper>
The ejection stopper 61 has a restricting portion 611 and a first rotating shaft portion 612 . The regulating portion 611 is a member that contacts the front end portion of the discharged sheet S to regulate the sheet S on the discharge tray 25 . The restricting portion 611 is a substantially rectangular plate-like member whose lengths in the left-right direction and the up-down direction are substantially equal to the lengths of the recess 251, and can be accommodated in the recess 251 without steps. A plurality of ribs 613 extending in the sheet discharging direction are arranged side by side in the lateral direction on the surface of the regulating portion 611 on the sheet S regulating side in order to convey the sheet S smoothly.

The first rotation shaft portion 612 is a shaft portion that protrudes and extends in the left-right direction from the left and right ends of the restriction portion 611 with the vicinity of the front end portion of the restriction portion 611 as the first rotation axis R1. The first rotating shaft portion 612 is rotatably supported by a hole (not shown) formed in the vicinity of the front end portion of the recess 251 .

The ejection stopper 61 is positioned at a first position (shown in FIG. 4), a second position (shown in FIG. 7), and a third position ( position shown in FIG. 9). The first position is a position where the ejection stopper 61 is accommodated in the recess 251 . The discharge stopper 61 is held at the first position by the restricting portion 611 coming into contact with the support projection 252 of the recess 251 and being supported.

The second position is a position where the discharge stopper 61 rises from the first position and regulates the discharged sheet S. FIG. The second position is a position where the center of gravity of the discharge stopper 61 is located forward of the rotation axis R1. As a result, the discharge stopper 61 tends to fall forward at the second position, and the restricting portion 611 comes into contact with the holding member 62 to be held at the second position.

The third position is a position opposite to the first position across the second position. The discharge stopper 61 is held at the third position when the restricting portion 611 pushes down the holding member 62 by an external force, and the front surface 62A of the holding member 62 contacts and is supported by the front end portion of the hole portion 253 .

The user can swing the ejection stopper 61 from the first position to the second position by pinching the rear end portion of the ejection stopper 61 at the first position and rotating the ejection stopper 61 forward and upward. Furthermore, by pushing forward and downward the ejection stopper 61 at the second position, the ejection stopper 61 can be swung from the second position to the third position.

In this embodiment, the discharge stopper 61 is housed in the recess 251 without protruding forward from the first housing 2 when it is at the first position, and protrudes forward from the first housing 2 when it is at the second position. , both the downsizing of the image forming apparatus 1 and the lengthening of the sheet S that can be regulated are achieved.

<Holding member>
The holding member 62 is a swinging member having a first contact portion 621 , a second contact portion 622 and a second rotating shaft portion 623 . The first contact portion 621 is a portion that contacts the restriction portion 611 of the ejection stopper 61 at the second position and the third position to hold the ejection stopper 61 . The first contact portion 621 is a surface formed on the upper portion of the holding member 62 protruding upward from the hole portion 253 of the concave portion 251, extends in the left-right direction, and faces rearward and upward. In this embodiment, the first contact portion 621 is formed at an angle of approximately 45° with respect to the sheet support surface 25A when the discharge stopper 61 is at the first position or the second position. This angle is the angle of the restricting portion 611 when the discharge stopper 61 is at the second position.

The second contact portion 622 is a portion that contacts the contact member 65 and receives the biasing force of the spring 64 . The second contact portion 622 is a surface formed on the lower portion of the holding member 62 positioned below the recess 251, extends in the left-right direction, and faces rearward and downward. In this embodiment, the second contact portion 622 is formed at an angle of approximately 60° with respect to the sheet support surface 25A when the ejection stopper 61 is at the first position or the second position.

The second rotating shaft portion 623 rotates from the left and right ends of the holding member 62 in the left-right direction with the position above the second contact portion 622 in the lower portion of the holding member 62 located below the recess 251 as the second rotating shaft center R2. is a shaft part that protrudes and extends to the The second rotating shaft portion 623 is rotatably supported in a hole (not shown) formed below the recess 251 .

The holding member 62 can be rotated between a fourth position (the position shown in FIGS. 4 and 7) and a fifth position (the position shown in FIG. 9) about the second rotation axis R2 of the second rotation shaft portion 623. It is possible to swing between. The fourth position is a position where the first contact portion 621 contacts the discharge stopper 61 at the second position to hold the discharge stopper 61 without contacting the discharge stopper 61 at the first position. The holding member 62 is pressed by the spring 64 and is held at the fourth position by the regulating member 63 coming into contact with the back surface 251A of the recess 251 .

Therefore, the ejection stopper 61 does not receive the biasing force of the spring 64 between the first position and the second position. Therefore, it is not necessary to operate against the urging force of the spring 64 when raising the ejection stopper 61 from the first position to the second position, thereby improving the operability.

The fifth position is a position where the first contact portion 621 contacts the discharge stopper 61 at the third position. The holding member 62 is pushed down by the ejection stopper 61 that is pushed by an external force, and the front surface 62A of the holding member 62 is held in the fifth position by contacting and being supported by the front end of the hole 253 .

As shown in FIG. 9, the holding member 62 is such that the first radial distance L1 from the second rotation axis R2 to the first contact portion 621 is the second distance from the second rotation axis R2 to the second contact portion 622. It is configured to be greater than the radial distance L2. According to this configuration, the user can push the ejection stopper 61 from the second position to the third position with a light force on the principle of leverage. Moreover, since the amount of expansion and contraction of the spring 64 is small, the size of the first housing 2 can be reduced.

Thus, by forming the holding member 62 with the swinging member, the length in the vertical direction can be made shorter than in the case where the holding member is formed with a sliding member that slides in the vertical direction. The height of body 2 can be reduced.

<Regulation member>
The restricting member 63 is a member that restricts the holding member 62 to the fourth position against the biasing force of the spring 64 . The regulating member 63 extends in the left-right direction at the lower portion of the holding member 62 positioned below the recess 251 and is provided at a position overlapping the recess 251 in the vertical direction. An upper surface 63A of the regulating member 63 is flat. When the holding member 62 is at the fourth position, the upper surface 63A of the regulating member 63 contacts the back surface 251A of the recess 251, thereby regulating the holding member 62 at the fourth position.

Although the regulating member 63 is formed integrally with the holding member 62 in this embodiment, the holding member 62 and the regulating member 63 may be separate parts. The position and shape of the regulating member 63 are not particularly limited as long as the holding member 62 can be regulated to the fourth position.

<Spring>
The spring 64 is a spring that biases the holding member 62 from the fifth position toward the fourth position. The spring 64 is a compression coil spring and extends in the front-rear direction to a position behind the second contact portion 622 of the holding member 62 below the recess 251 and overlapping the second contact portion 622 of the holding member 62 in the left-right direction. are arranged as

Note that the spring 64 is not limited to a compression coil spring, and may be any spring that biases the holding member 62 from the fifth position toward the fourth position, such as a tension coil spring, a torsion coil spring, or a leaf spring. may The springs 64 are preferably arranged horizontally, as they are arranged to extend in the longitudinal direction in this embodiment. Thereby, the height of the first housing 2 can be reduced.

<Contact member>
The contact member 65 is a member that is attached to the front end portion, which is an example of the tip portion of the spring 64 , and contacts the second contact portion 622 of the holding member 62 . The contact member 65 is a rod-shaped member with rounded corners at the front end that contacts the second contact portion 622 . The contact member 65 is fixed to the spring 64 by inserting the rear end portion, which is thinner than the front end portion, into the front end portion of the spring 64 .

The contact member 65 is arranged at a position overlapping the holding member 62 in the left-right direction. Accordingly, even if the hole 253 formed in the recess 251 is large, the contact member 65 is hidden by the holding member 62 and is difficult to see from the user, and the appearance is good.

When the holding member 62 is composed of a swinging member as in this embodiment, the holding member 62 tends to pry the spring 64 . Since it is pressed while sliding against the portion 622, it is possible to suppress the occurrence of prying. The contact member 65 is not an essential component, and the contact member 65 may be omitted so that the front end portion of the spring 64 contacts the second contact portion 622 of the holding member 62 .

[Operation of the stopper part]
As shown in FIG. 4, in a state where the ejection stopper 61 is at the first position and the holding member 62 is at the fourth position, when the user pinches the rear end portion of the restriction portion 611 of the ejection stopper 61 and pulls it up, the restriction portion 611 rises from the first position. At this time, since the ejection stopper 61 is not subjected to the biasing force of the spring 64, the user can operate the ejection stopper 61 with a small force. Then, as shown in FIG. 7, the ejection stopper 61 is held at the second position by the restricting portion 611 coming into contact with the first contact portion 621 of the holding member 62 at the fourth position.

In the state shown in FIG. 7, the discharged sheet S is regulated on the discharge tray 25 by coming into contact with the discharge stopper 61 . When the user pushes the ejection stopper 61 forward and downward against the biasing force of the spring 64 in order to take out the sheet S, the ejection stopper 61 swings from the second position toward the third position, and the holding member 62 swings from the fourth position toward the fifth position. Then, as shown in FIG. 9, the front surface 62A of the holding member 62 abuts against the front end of the hole 253, so that the holding member 62 is held at the fifth position and the discharge stopper 61 is held at the third position. .

By pressing the discharge stopper 61 in this way, the sheet take-out opening 26 becomes larger, and the sheet S can be taken out more easily. When the sheet S is removed and the discharge stopper 61 is no longer pushed, the holding member 62 returns from the fifth position to the fourth position by the biasing force of the spring 64, and the discharge stopper 61 returns from the third position to the second position. In this way, after the sheet S is taken out, the discharge stopper 61 automatically returns to the second position by the biasing force of the spring 64. Therefore, the user does not need to return the discharge stopper 61 to the second position, which is convenient.

[others]
In the above embodiment, the holding member 62 is a swing member that swings about the second rotation axis R2, but it may be a slide member that slides in the vertical direction. Specifically, a second contact portion may be arranged on the lower surface of the holding member, a spring may be provided below the second contact portion, and the spring may bias the holding member in a direction to push it up.

Further, the image forming apparatus 1 is provided with a stopper portion 54 on the document ejection tray 53 of the ADF 5 . This stopper portion 54 can also have the same configuration as the stopper portion 6 of the discharge tray 25 .

[Effects of Embodiment]
The image forming apparatus 1 described above includes a discharge tray 25 that supports the sheet S discharged by the discharge rollers 241 . Further, the image forming apparatus 1 is swingable about the first rotation axis R1, and is positioned at a first position where it is accommodated in the discharge tray 25, and rises from the first position to regulate the discharged sheet S. A discharge stopper 61 is provided which swings between a second position and a third position opposite to the first position across the second position. Further, the image forming apparatus 1 is at a fourth position where the discharge stopper 61 is held while not in contact with the paper discharge stopper 61 at the first position but in contact with the discharge stopper 61 at the second position, and at a third position. A holding member 62 is provided which is displaceable between a fifth position abutting against the discharge stopper 61 . The image forming apparatus 1 also includes a spring 64 that biases the holding member 62 from the fifth position toward the fourth position. The image forming apparatus 1 also includes a restricting member 63 that restricts the holding member 62 to the fourth position against the biasing force of the spring 64 .

According to this configuration, the restricting member 63 restricts the holding member 62 to the fourth position, so that the ejection stopper 61 is not biased by the spring 64 between the first position and the second position. Therefore, it is not necessary to operate against the urging force of the spring 64 when raising the ejection stopper 61 from the first position to the second position, and the operability is improved. Further, even when the user pushes the ejection stopper 61 from the second position to the third position in order to take out the sheet S, the ejection stopper 61 automatically returns from the third position to the second position due to the biasing force of the spring 64 . , easy to use.

Further, according to the image forming apparatus 1 described above, the holding member 62 is composed of a swing member that can swing about the second rotation axis R2 between the fourth position and the fifth position.

According to this configuration, the length in the vertical direction can be shortened and the height of the first housing 2 can be reduced as compared with the case where the holding member 62 is composed of a sliding member that slides in the vertical direction. can.

Further, according to the image forming apparatus 1 described above, the holding member 62 has the first contact portion 621 that contacts the ejection stopper 61 and the second contact portion 622 that receives the biasing force of the spring 64 . The holding member 62 is arranged such that the first radial distance L1 from the second rotation axis R2 to the first contact portion 621 is greater than the second radial distance L2 from the second rotation axis R2 to the second contact portion 622. configured to

According to this configuration, the user can push the ejection stopper 61 from the second position to the third position with a light force on the principle of leverage. Moreover, since the amount of expansion and contraction of the spring 64 is small, the size of the first housing 2 can be reduced.

Further, according to the image forming apparatus 1 described above, the ejection tray 25 has the concave portion 251 that accommodates the ejection stopper 61 at the first position. The spring 64 is a compression coil spring, and is arranged so as to extend horizontally at a position vertically overlapping the recess 251 .

According to this configuration, since the spring 64 is arranged horizontally, the height of the first housing 2 can be reduced.

Further, according to the image forming apparatus 1 described above, the contact member 65 that contacts the holding member 62 is provided at the tip of the spring 64 .

According to this configuration, when the holding member 62 is composed of a swing member that can swing around the second rotation axis R2, the holding member 62 tends to pry the spring 64, but the contact member 65 is provided. As a result, the contact member 65 slides and pushes against the holding member 62, so that the occurrence of prying can be suppressed.

Further, according to the image forming apparatus 1 described above, the contact member 65 is arranged at a position overlapping the holding member 62 in the width direction orthogonal to the sheet discharge direction.

According to this configuration, the contact member is hidden by the holding member 62 and is difficult for the user to see, and the appearance is good.

1 image forming apparatus 25 discharge tray 61 discharge stopper 62 holding member 63 regulating member 64 spring 65 contact member 241 discharge roller 251 concave portion 621 first contact portion 622 second contact portion L1 first radial distance L2 second radial distance R1 first time Drive axis R2 Second rotation axis S Seat

Claims (7)

a discharge tray for supporting the sheet discharged by the discharge roller;
A first position that is swingable about a first rotation axis and is accommodated in the discharge tray; a second position that rises from the first position and regulates the discharged sheets; an ejection stopper that swings between the first position and a third position on the opposite side across the position;
A fourth position where the discharge stopper is held by contacting the discharge stopper at the second position without contacting the discharge stopper at the first position, and a contact with the discharge stopper at the third position. a holding member displaceable between a contacting fifth position;
a spring that biases the holding member from the fifth position toward the fourth position;
and a restricting member that restricts the holding member to the fourth position against the biasing force of the spring. 2. The seat according to claim 1, wherein said holding member comprises a swinging member capable of swinging about a second rotation axis between said fourth position and said fifth position. ejection device. The holding member is
a first contact portion that contacts the discharge stopper;
a second contact portion that receives the biasing force of the spring;
A first radial distance from the second rotation axis to the first contact portion is configured to be larger than a second radial distance from the second rotation axis to the second contact portion. 3. The sheet ejection device according to claim 2. the ejection tray has a recess for accommodating the ejection stopper at the first position;
4. The sheet ejection device according to claim 2, wherein the spring is a compression coil spring, and is arranged so as to extend horizontally at a position overlapping the recess in the vertical direction. 5. The sheet ejection device according to claim 2, wherein a contact member that contacts the holding member is provided at the tip of the spring. 6. The sheet ejection device according to claim 5, wherein the contact member is arranged at a position overlapping the holding member in a width direction perpendicular to the sheet ejection direction. an image forming unit that forms an image on a sheet;
7. An image forming apparatus, comprising: the sheet ejection device according to claim 1, which ejects a sheet on which an image is formed.

Images