JPH08133556A - Medium discharging mechanism - Google Patents

Abstract

PURPOSE: To provide a medium discharging mechanism in which a stable faceup discharge can be performed. CONSTITUTION: Auxiliary medium receiving bases 7, 8 are rotatably mounted on a faceup discharge stacker 2. Switching operation bars 15 and switching operation bars 16 are provided on botn side inner parts of the faceup discharge stacker 2 and both side inner parts of the auxiliary medirespectively. Switching operation bar operating parts 19 are provided on both end parts of the auxiliary medium receiving base 8. When the other-side ends of the switching operation bars 16 are pressed by the switching operation bar operating parts 19, the switching operation bars 16 are slid within the auxiliary medium receiving base 7, and on-side ends thereof press the other ends of the switching operation bars 15, respectively. The pressed switching operation bars 15 are slid within the faceup discharge stacker 2, and one-side ends 15a press a switching operation part 4, which is then rotated to switch the medium traveling route.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus which prints on a single-cut sheet and discharges it outside the apparatus, and more particularly, a face-up discharge for discharging a print surface upward and a face for discharging a print surface downward. The present invention relates to a medium ejection mechanism capable of switching down ejection.

[0002]

2. Description of the Related Art Conventionally, in a printing apparatus that prints on a single-cut sheet that is a medium, when the printed single-cut sheet is discharged to the outside of the apparatus, face-up discharge is performed with the printing surface facing up. There is one in which either one of the face-down discharge methods of discharging with the printing surface facing down can be selected.

When face-down discharge is performed, discharge is performed on a face-down discharge stacker provided in advance in the apparatus, but when face-up discharge is performed, face-up normally stored in the apparatus is performed. The output stacker is rotated to spread it out of the apparatus, and the output stacker is sized so that an area sufficient for accommodating a single-cut sheet can be obtained.

The face-up discharge stacker is usually housed in the apparatus, so that it is small and compact. Therefore, in most cases, even if the face-up discharge stacker is widened, the size is not enough to accommodate the entire discharged single-cut sheets.

Therefore, by carrying out a multi-step operation to expand the face-up discharge stacker compactly accommodated in the apparatus and the auxiliary medium cradle attached to at least one face-up discharge stacker, the accommodation is performed. It is often used by expanding the area. That is, after the face-up discharge stacker is rotated and widened, the auxiliary medium storage base is also rotated and widened to widen the storage area, so that the single-cut sheet can be stored for the first time.

When the face-up discharge stacker accommodated in the folded state is rotated, a medium discharge path switching operation unit (hereinafter, referred to as a switching operation unit) for changing the cut sheet traveling path is rotated together with the rotation. Since the medium traveling path is also changed, when the face-up discharge stacker is opened, the cut sheets are discharged face-up and are discharged onto the face-up discharge stacker spread outside the apparatus.

[0007]

In the conventional printing apparatus described above, when the face-up discharge stacker is expanded from the inside of the apparatus to the outside of the apparatus, the cut sheet traveling path is also switched with it. The table is not yet fully expanded, and even if it is not large enough to accommodate the cut sheets, the cut sheets are ejected, and as a result, the cut sheets do not accumulate and fall. There was a problem that it would end up.

Further, even if the operator forgets to expand the auxiliary medium receiving tray, the single-cut sheets are discharged onto the face-up discharge stacker. There was a problem that it fell from the face-up discharge stacker.

[0009]

[Means for Solving the Problems] A solution means provided by the present invention for solving the above-mentioned problems is a stacker housed in an apparatus main body and rotatably attached to the apparatus main body.
At least one auxiliary medium pedestal rotatably attached to the stacker is expanded by a multi-step operation to expand the medium storage area, and the medium discharge path switching operation unit that rotates with the opening operation of the stacker moves the medium. In the medium discharging mechanism for switching the paths and accumulating the medium in the stacker and the auxiliary medium receiving stand, the medium is slidably provided in the stacker,
When the stacker is in the expanded state, the one end of the stacker is provided to the switching operation rod facing the medium discharge path switching operation section and the auxiliary medium cradle, and when the auxiliary medium cradle is in the expanded state , And a switching operation rod operation unit that rotates the medium discharge path switching operation unit by pressing the other end of the opposing switching operation rod.

[0010]

[Function] The stacker is opened by the opening operation, and then the auxiliary medium cradle is expanded. Then, the switching operation rod operating unit presses the other end of the switching operation rod. As a result, the switching operation rod slides in the stacker, one end presses and rotates the medium discharge path switching operation unit, and the medium traveling path is switched.

As a result, when both the stacker and the auxiliary medium cradle are completely opened, the medium traveling path can be switched.

[0012]

Embodiments of the present invention will be described with reference to the drawings. The elements common to the drawings are designated by the same reference numerals.

First Embodiment FIG. 1 is a partially transparent perspective view showing a printer of a first embodiment according to the present invention, and FIGS. 2, 3 and 4 are partially enlarged perspective views showing a medium discharging mechanism of the first embodiment. It is a figure. The printing apparatus is provided with a stacker for transporting cut sheets of paper, which is a medium printed inside the apparatus, through a medium traveling path and accumulating the cut sheets when ejected outside the apparatus. There are two discharge methods: face-up discharge that prints up and face-down discharge that prints down.
In a printing device equipped with both discharge methods,
Either discharging method can be selected. Therefore, the printing apparatus 1 shown by the chain double-dashed line in FIG. 1, which has two discharge methods, is provided with two stackers, the face-up discharge stacker 2 and the face-down discharge stacker 3.

The face-up discharge stacker 2 is rotatably provided with respect to the printer 1 by means of a shaft 28, and is normally housed in the printer 1. Only when face-up discharge is performed, the operator rotates about 90 degrees and unfolds it so that it can be used.

In FIGS. 1 and 2, the printing apparatus 1 is also provided with a switching operation section 4 for switching the medium traveling path according to the stacker used. The switching operation unit 4 is rotatable with respect to the printing apparatus 1 by the shaft 5, and is normally not rotated by the urging force of the spring 6, that is, the face-down discharge stacker 3 has a single-cut sheet. The medium traveling path is positioned on the side of the face-down discharging traveling path 29 so that the sheet is discharged. Note that the switching operation unit 4 shown in FIG. 1 is in a rotating state, and in this state, the cut sheets are conveyed in the direction of arrow C and accumulated on the face-up discharge stacker 2.

In FIG. 1, a plurality of auxiliary medium pedestals are rotatably attached to the face-up discharge stacker 2. These auxiliary medium receiving trays 7 and 8 are normally housed in the printing apparatus 1 in a folded state together with the face-up discharge stacker 2.

As shown in FIG. 3, connecting members 9 are provided on both sides of the face-up discharge stacker 2, and these connecting members 9 are provided on both sides of the auxiliary medium receiving base 7. The connecting member 9 and the connecting member 10 are rotatably connected by a shaft 11. As shown in FIG. 4, the auxiliary medium receiving stand 7 also has
The connecting members 12 are provided on both sides, and these connecting members 12 are engaged with the connecting members 13 provided on both sides of the auxiliary medium pedestal 8 to connect the connecting members 12 and 13 to each other.
Are rotatably connected by a shaft 14.

In FIG. 1, the switching operation rods 15 are provided inside the both sides of the face-up discharge stacker 2.
However, the one end 15a is provided slidably by a predetermined amount so that the switching operation unit 4 can be rotated from the face-up discharge stacker 2. This switching operation bar 15 is used for the face-up discharge stacker 2
However, the one end 15a is positioned at a position where the one end 15a abuts on the switching operation part 4 when the unfolded state is reached. The switching operation rod 15 is formed longer than the length of the face-up stacker 2 by a length substantially equal to the slidable amount.

Further, a switching operation bar 16 is provided inside each of both sides of the auxiliary medium pedestal 7 and the auxiliary medium pedestal 7 is provided.
3 for the purpose of sliding the switching operation rod 15 by a predetermined amount, the end 16 shown in FIG.
It is slidably provided so that a projects. The switching operation rod 16 is positioned such that the one end 16a faces the other end 15b of the switching operation rod 15 when the face-up discharge stacker 2 and the auxiliary medium receiving stand 7 are in the expanded state. It has become. It should be noted that this switching operation rod 16 is used for the auxiliary medium receiving base 7
Is formed to have a length substantially equal to the length of.

In FIGS. 1 and 4, switching operation rod operating portions 19 are provided on both sides of the auxiliary medium receiving base 8. These switching operation rod operating portions 19 are positioned so as to press the other end 16b of the switching operation rod 16 when the auxiliary medium receiving base 7 and the auxiliary medium receiving base 8 are in the expanded state. Has become.

The one end 15a of the switching operation rod 15 is
The other end 15b, one end 16a of the switching operation rod 16, the other end 1
6b are respectively formed on the inclined cam surfaces, and when the other end 15b of the switching operation rod 15 and the one end 16a of the switching operation rod 16 are combined, they are formed so as to be substantially coaxial.

Since one end 15a of the switching operation rod 15 is a cam surface, even when the switching operation rod 15 is pressed by the switching operation rod 16 and protrudes from the predetermined position toward the switching operation portion 4, One end 15a of the switching operation rod 15 can be brought into contact with the switching operation unit 4, and the direction of the force when pressing the switching operation unit 4 can be converted into the direction of the force that rotates the switching operation unit 4. it can.

Further, since the other end 15b of the switching operation rod 15 is a cam surface, the switching operation rod 16 is pressed by the switching operation rod operating portion 19 and protrudes toward the switching operation rod 15 from a predetermined position. Even when the switching operation rod 16 is in the open state, one end 16a of the switching operation rod 16 can be brought into contact with the other end 15b of the switching operation rod 15, and the direction of the force when pressing the switching operation rod 15 is slid on the switching operation rod 15. It can be converted into the direction of force.

Further, since one end 16a of the switching operation rod 16 is a cam surface, one end 16a of the switching operation rod 16 is the other end 15b of the switching operation rod 15 in FIG.
When the one end 16a presses the other end 15b, the one end 16a of the switching operation rod 16 easily enters the face-up discharge stacker 2.

Since the other end 16b of the switching operation rod 16 is a cam surface, when the operator first rotates the face-up stacker 2 by about 90 degrees and unfolds it, the switching operation rod 15 springs. The switching operation rod 16 is pressed by the urging force of
Even when is protruding from the predetermined position toward the switching operation rod operating portion 19, the switching operation rod operating portion 19 can be brought into contact with the other end 16b of the switching operation rod 16,
The direction of the force when pressing the switching operation rod 16 can be converted into the direction of the force that slides the switching operation rod 16.

The face-up discharge stacker 2 and
The switching operation unit 4, the auxiliary medium receiving bases 7 and 8, the switching operation rods 15 and 16, and the switching operation rod operation unit 19 constitute a medium ejection mechanism 26.

Next, the face-up discharge switching operation by the multi-step operation in the above configuration will be described. In FIG. 1 and FIG. 2, in order to switch from face-down discharge to face-up discharge, first, the operator puts the face-up discharge stacker 2 in the stored state by about 90
Rotate (open motion) to unfold. At this time, the switching operation rod 15 also rotates about 90 degrees at the same time and contacts the switching operation unit 4. Then, the switching operation unit 4 has a spring 6
The switching operation rod 15 is pushed in the direction of arrow C, and the other end 15b projects from the face-up discharge stacker 2 by a predetermined amount.

However, since the other end 15b of the switching operation rod 15 is still free in this state,
The switching operation rod 15 does not press the switching operation unit 4.

Next, referring to FIGS. 1 and 3, when the face-up discharge stacker 2 is expanded, the auxiliary medium pedestal 7 comes out of the printing apparatus 1 in a folded state with respect to the face-up discharge stacker 2. The operator rotates about 180 degrees to spread it out. At this time, the switching operation rod 16 also rotates about 180 degrees at the same time, one end 16a is positioned at a position facing the other end 15b of the switching operation rod 15, and the protruding other end 15b also pushes in the direction of arrow C. Then, the other end 16b is projected by a predetermined amount. However, since the other end 16b of the switching operation rod 16 is still in the free state in this state, the switching operation rod 16 does not press the other end 15b of the switching operation rod 15.

Further, in FIG. 1 and FIG. 4, the auxiliary medium receiving tray 8 which is in a folded state with respect to the face-up discharge stacker 2 is expanded by the operator rotating about 180 degrees. At this time, the switching operation rod operating portion 19 also rotates about 180 degrees at the same time, and the other end 16b of the switching operation rod 16 is also rotated.
Press.

Then, the switching operation rod 16 slides in the auxiliary medium pedestal 7, and one end 16a of the switching operation rod 1 moves.
The other end 15b of 5 is pressed. The pressed switching operation rod 15 slides in the face-up discharge stacker 2, and the one end 15a presses the switching operation unit 4. Then, the switching operation unit 4 rotates in the direction of arrow B against the biasing force of the spring 6, and the medium traveling path is switched from face-down ejection to face-up ejection, as shown in FIG.

While the one end 15a of the switching operation rod 15 is pressing the switching operation unit 4, the switching operation unit 4 is pressed.
The rotation state of is retained.

On the other hand, one end 15a of the switching operation rod 15,
The other end 15b, one end 16 of the switching operation rod 16, the other end 16
b is projected from the face-up discharge stacker 2 and the auxiliary medium pedestal 7 in response to the pressing of the opposite ends, but one end 15a of the switching operation rod 15
The other end 15b, one end 16a of the switching operation rod 16, the other end 1
Since 6b is a cam surface, even if the rotation loci of the one end 15a and the other end 15b of the switching operation rod 15 and the one end 16a and the other end 16b of the switching operation rod 16 change according to the protrusion amount, the switching operation is changed. Within the sliding range of the rods 15 and 16, it is not possible to press the opposite ends, and the one end 15a and the other end 15b of the switching operation rod 15 and the one end 16a and the other end of the switching operation rod 16 are performed. 16
The direction of the force when b presses the opposing end can be converted into the direction of the force that rotates and slides the switching operation unit 4 and the switching operation rod 15.

As a result, no problem occurs even if the operation for switching from face-down discharge to face-up discharge is not performed in the above-described order, and the face-up discharge stacker 2 and the auxiliary medium receiving tray are in the order preferred by the operator. 7,
8 can be widened.

When the face-up discharge stacker 2 and the auxiliary medium receiving trays 7 and 8 are stored in the printing apparatus 1, the storing operation is performed in the reverse order of the above operation. When the auxiliary medium receiving tray 8 is folded with respect to the auxiliary medium receiving tray 7, the switching operation rod operating portion 19 does not press the switching operating rod 16 so that the one end 15a of the switching operation rod 15 does not press the switching operating portion 4. . Then, the switching operation unit 4 tries to return to the original position by the urging force of the spring 6, and the arrow D
It rotates in the direction and is pressed by the switching operation unit 4 to return the switching operation rod 15 and the switching operation rod 16 to their original positions.

Further, even if the auxiliary medium receiving base 7 is first folded with respect to the face-up discharge stacker 4, one end 15a of the switching operation rod 15 does not press the switching operation portion 4, and the switching operation is performed by the urging force of the spring 6. The portion 4 rotates in the direction of arrow D to return to the original position, and is pressed by the switching operation portion 4 to return the switching operation rod 15 to the original position. Further, in this case, the switching operation rod 16 is not pressed by the switching operation rod 15, but since the switching operation rod 16 is always in the free state, there is no problem even if it does not return to the original position.

In the first embodiment described above, the medium traveling path is not switched unless the face-up discharge stacker 2 and the auxiliary medium receiving trays 7 and 8 are all widened. Further, if any one of the face-up discharge stacker 2 and the auxiliary medium receiving trays 7 and 8 is not completely expanded, the switching operation unit 4 does not rotate.

One end 15a and the other end 1 of the switching operation rod 15
5b, one end 16a and the other end 16b of the switching operation rod 16 are respectively formed on the cam surfaces that are inclined surfaces, and when the other end 15b of the switching operation rod 15 and the one end 16a of the switching operation rod 16 are combined, they are substantially coaxial. Since they are formed so as to be arranged side by side, there is no problem even if the order of the rotating operation when the face-up discharge stacker 2 and the auxiliary medium receiving trays 7 and 8 are widened is different from the above-mentioned order. Also, the switching operation rod 1
Regardless of the position of the sliding range of 5 and 16, the rotation of the switching operation rod operating unit 19 can press the ends of the switching operation rods 15 and 16 facing each other and the switching operation unit 4.

Therefore, unless the face-up ejection stacker 2 and the auxiliary medium receiving trays 7 and 8 are all widened, the medium traveling path is not switched, and stable medium ejection is possible. Further, even if the face-up discharge stacker 2 is unintentionally expanded during the face-down discharge operation, face-up discharge is not performed unless the auxiliary medium receiving trays 7 and 8 are expanded, so that a failure due to a misoperation such as a paper jam can be prevented. can do.

Further, since the switching operation rods 15 are provided on both sides of the face-up discharge stacker 2, respectively, the switching operation unit 4 can be stably rotated when it is rotated.

Further, in this embodiment, the multi-step operation of three steps has been described. However, only the face-up discharge stacker 2 and the auxiliary medium receiving base 8 may be provided to perform a multi-step operation of two steps, or an auxiliary operation. The medium receiving stand 7 may be provided with an auxiliary medium receiving stand having the same structure to perform multi-step operation of four steps or more.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. FIG. 5 is a partially transparent perspective view showing the printing apparatus of the second embodiment. The second embodiment is different from the first embodiment in that the switching operation rod 21 has a substantially U-shape, and the switching operation rod operating portion 22 is provided.
Is a cam positioned to press the switching operation rod 21 when the auxiliary medium pedestal 23 is expanded, and the switching operation rod operation unit 22 is rotated in a direction substantially orthogonal to the switching operation unit 4. This is a free point.

More specifically, in FIG. 5, the printing apparatus 1 shown by the chain double-dashed line is provided with a switching operation unit 4 for switching the medium traveling path according to the stacker to be ejected. The switching operation unit 4 is rotatable with respect to the printing apparatus 1 by the shaft 5, and is normally not rotated by the urging force of the spring 6, that is, the face-down discharge stacker 3 has a single-cut sheet. Is discharged,
The medium traveling path is positioned on the side of the face-down discharge traveling path 29. Note that the switching operation unit 4 shown in FIG. 5 is in a rotating state, and in this state, the cut sheets are conveyed in the direction of arrow C and accumulated on the face-up discharge stacker 2.

Inside the both side portions of the face-up discharge stacker 24, the switching operation rods 21 having a substantially U shape are provided.
The switching operation unit 4 is slidably provided by a predetermined amount so that the one end 21a protrudes by an amount by which the switching operation unit 4 can be rotated. When the face-up discharge stacker 24 is in the expanded state as shown in FIG.
It is designed to be positioned so as to abut.

The one end 21a of the switching operation rod 21 is formed on a cam surface which is an inclined surface.

Inside the face-up discharge stacker 24, the auxiliary medium receiving base 23 is rotatably housed outside the face-up discharge stacker 24 with the pin 25 as a fulcrum at a position indicated by a chain double-dashed line. This auxiliary medium cradle 2
3 is normally housed in the printer 1 together with the face-up discharge stacker 24.

At the one end of the auxiliary medium receiving base 23, when the auxiliary medium receiving base 23 is expanded, the switching operation rod operation is a cam positioned to press the other end 21b of the switching operation rod 21. A section 22 is provided.

The face-up discharge stacker 24
The switching operation unit 4, the auxiliary medium pedestal 23, the switching operation rod 21, and the switching operation rod operation unit 22 constitute a medium ejection mechanism 27.

Next, the face-up discharge switching operation by the multi-step operation in the above configuration will be described. Figure 5
In order to switch from face-down discharge to face-up discharge, first, the face-up discharge stacker 24 in the stored state is opened by rotating the operator about 90 degrees (opening operation). At this time, the switching operation rod 21
At the same time, the end 21a comes into contact with the switching operation unit 4 by rotating about 90 degrees. Then, since the urging force of the spring 6 acts on the switching operation part 4, the switching operation bar 21
Is pressed in the direction of arrow C, and the other end 21b moves in the direction of arrow C.

However, since the other end 21b of the switching operation rod 21 is still free in this state,
The switching operation rod 21 does not press the switching operation unit 4.

Next, the operator rotates the auxiliary medium receiving base 23 indicated by the chain double-dashed line housed in the face-up discharge stacker 24 by about 90 degrees in the direction of arrow A to widen it. At this time, the switching operation rod operating section 22 also rotates about 90 degrees in the direction of arrow A and presses the other end 21b of the switching operation rod 21.

Then, the switching operation rod 21 slides in the face-up discharge stacker 2, and the one end 21a presses the switching operation portion 4. Then, the switching operation unit 4 rotates in the direction of arrow B against the biasing force of the spring 6,
As shown in, the medium traveling path is switched, and the face-up ejection is switched. The switching operation rod 2
While the one end 21a of 1 is pressing the switching operation unit 4, the rotation state of the switching operation unit 4 is maintained.

On the other hand, one end 21a of the switching operation rod 21 projects from the face-up discharge stacker 24 in response to the pressing of the other end 21b, but since the one end 21a is a cam surface, the one end 21a slides. At any position within the movable range, the opposite switching operation unit 4 cannot be pressed, and one end 21a of the switching operation rod 21 does not press the switching operation unit 4. The direction can be converted into the direction of the force that rotates the switching operation unit 4.

As a result, the operation for switching from face-down discharge to face-up discharge is expanded with the face-up discharge stacker 24 halfway, and the auxiliary medium pedestal 2
No problem will occur even if 3 is unfolded and then the face-up discharge stacker 24 is completely unfolded.

As described above, in the second embodiment, since the switching operation rod operating portion 22 is rotated very close to the pin 25, the dispersion of the force in the acting direction is smaller than that in the first embodiment,
The operation will be stable.

Further, in the same manner as in the first embodiment, of the face-up discharge stacker 24 and the auxiliary medium receiving table 23,
If either one is not completely opened, the switching operation unit 4 will not rotate. Therefore, unless both the face-up discharge stacker 24 and the auxiliary medium receiving base 23 are widened, the medium traveling path is not switched, and stable medium discharge is possible. Further, even if the face-up discharge stacker 24 is accidentally expanded during the face-down discharge operation, face-up discharge will not occur unless the auxiliary medium pedestal 23 is expanded. Therefore, it is possible to prevent troubles due to erroneous operations such as paper jams. You can

In the first and second embodiments described above, the case where the medium discharge method is switched manually has been described. However, a secondary processing device for discharged media, for example, a double-sided printing unit is connected to the printer 1. If a mechanism for mechanically controlling the pressing operation of the switching rod is provided externally, the medium with one side printed will be ejected face up, while it will pass through the double sided printing unit and then be conveyed to the back side printing process for double sided printing. A series of controls such that the performed medium is discharged face down can be easily realized without affecting the internal modification of the printer 1.

[0058]

Since the present invention is configured as described above, it has the following effects. When the stacker is slidably installed in the stacker and the stacker is in the expanded state, one end is opposed to the switching operation part, and the auxiliary medium receiving stand is provided. In this state, by providing the switching operation rod operation unit that presses the other end of the opposing switching operation rod to rotate the medium discharge path switching operation unit, both the stacker and the auxiliary medium receiving stand are provided. The medium ejecting path switching operation unit does not rotate unless it is fully opened.

Therefore, stable medium ejection becomes possible,
It is possible to prevent the medium from falling.

[Brief description of drawings]

FIG. 1 is a partially transparent perspective view showing a printing apparatus according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view showing a medium ejection mechanism of the first embodiment.

FIG. 3 is a partially enlarged perspective view showing a medium ejection mechanism of the first embodiment.

FIG. 4 is a partially enlarged perspective view showing a medium ejection mechanism of the first embodiment.

FIG. 5 is a partial perspective view showing a printing apparatus according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printing device 2, 24 Face-up discharge stacker 4 Switching operation part 7, 8, 23 Auxiliary medium receiving stand 15, 16, 21 Switching operation rod 19, 22 Switching operation rod operation part

Claims (3)

[Claims] 1. A stacker housed in the apparatus main body and rotatably attached to the apparatus main body, and at least one auxiliary medium pedestal rotatably attached to the stacker are expanded by a multi-step operation. Expand the medium storage area,
In the medium discharging mechanism that stacks the media on the stacker and the auxiliary medium receiving tray by switching the medium traveling path by the medium discharging path switching operation unit that rotates with the opening operation of the stacker, the stacker is slidably provided inside the stacker. The switching operation rod, one end of which faces the medium discharge path switching operation unit when it is in the expanded state, and the auxiliary operation medium, which is provided in the auxiliary medium pedestal and is opposed when the auxiliary medium pedestal is in the expanded state And a switching operation rod operating section for pressing the other end of the switching operation rod to rotate the medium ejection path switching operating section. 2. The medium ejecting mechanism according to claim 1, wherein the switching operation rods are provided on both sides of the stacker, and are formed on a cam surface having both ends of the switching operation rod as inclined surfaces. 3. The switching operating rod has a substantially U-shape, and the switching operating rod operating portion is positioned at a position where the switching operating rod is pressed when the auxiliary medium cradle is expanded. The medium ejecting mechanism according to claim 1.