JPH082768A - Sheet discharge device - Google Patents

Abstract

PURPOSE:To provide a sheet discharge device capable of easily inserting a sheet on and after the second sheet to a lower side of an existing discharged sheet by eliminating necessity for properly arranging a page after a print is ended. CONSTITUTION:In a sheet discharge device, a fixed sheet loading member 21 loading a printed sheet placing a printing surface in the upper side and a movable sheet loading member (cross rotary unit) 55 vertically passing a hole 22 formed in the fixed sheet loading member 21 are provided, to lift the lowermost surface of a sheet Si, discharged just before each newly discharging a sheet Si, by the movable sheet loading member 55, and the newly printed sheet Si is discharged to a lower side of the existing discharged sheet Si.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet discharging device for sheets and the like in a printer or the like that uses electrophotography, and more particularly to a sheet discharging device that aligns pages easily and with good operability.

[0002]

2. Description of the Related Art When printing a plurality of pages in a conventional low-cost printer, it is, of course, extremely preferable that the pages can be aligned and ejected from the viewpoint of customer operability. However, in the conventional printer, the second page of paper overlaps the first page of paper, and the new page overlaps with the paper of the immediately preceding page in the same manner, and the paper accumulates in the reverse order to the original page order. To be done. Therefore, it is necessary to rearrange the order of pages again after printing is completed, and there is a drawback that an extra burden is imposed on the customer. Many attempts have been made to solve these drawbacks. For example, the following (J01) technology is known. (J01) (Printer equipped with large-capacity memory) Installed large-capacity memory and from the last page to sheet (paper)
It is a method of printing on. With this method, the pages are aligned at the time when printing is completed, and the printing surface is facing upward, so that the printing state can be immediately confirmed, and therefore, there is extremely excellent operability. However, since it is necessary to mount a large-capacity memory on the printer, there is a problem that the price is significantly increased.

As a means for improving the problems of the prior art (J01), for example, the following (J02) is known. (J02) (Technology disclosed in Japanese Patent Laid-Open No. 62-194261) The paper discharge method described in this publication is a method in which a transfer portion is provided above and a printing surface is located below and paper is discharged. In addition, a method of reversing and ejecting the paper after the fixing step to align the pages, a method of providing a reversing mechanism (inverter) in the apparatus body, and the like have been proposed. However, with any of the above paper ejection methods, page alignment is possible, but since the printed surface of the ejected paper is on the back side, it is not possible to immediately check the printing status, and it is possible to immediately check for defective printing. However, there is a problem in that the operability is significantly deteriorated because the number of extra operations that the printed paper must be turned over once increases.

On the other hand, there is also a method in which the second and subsequent sheets of paper are inserted with the printing side facing up underneath the sheet printed immediately before, and the pages are aligned with the printing side up. Proposed. For example, the following (J03) and (J0
4) technology is known. (J03) (Technique described in Japanese Utility Model Publication No. 61-36523) In the paper discharge method described in this publication, a rotary member having an opening through which a paper sheet can pass is provided at the entrance of a paper discharge tray, and is printed first. In this method, the rear end of the paper is lifted to easily insert the second and subsequent papers. However, in this method, since the paper is placed directly on the tray from the center to the leading edge of the previously printed paper, the self-weight of the previously printed paper becomes a resistance against the paper inserted later. It becomes extremely difficult to easily eject the second and subsequent sheets of paper onto the tray, and troubles such as paper jams occur.
This becomes a serious problem especially when the number of pages is large. (J04) (Technology, etc. disclosed in Japanese Utility Model Laid-Open No. 63-26661) The paper discharge method described in this publication is the same as (J03).
Since the next sheet is inserted while receiving the weight of the previously printed sheet, it becomes extremely difficult to easily eject the second and subsequent sheets onto the tray. Furthermore, JP-A-63
The paper discharge method described in Japanese Patent Laid-Open No. 185770 also has the same problem as described above.

[0005]

As described above, in a general-purpose printer, it is necessary to reverse the order of pages after printing, and a printer equipped with a large-capacity memory is extremely costly. The method of ejecting the paper with the printing surface facing down has a problem that the printing state cannot be immediately confirmed. Further, in the conventional method of aligning pages with the print side facing up, there is no means for reducing the dead weight of the previously ejected paper, so the second and subsequent sheets are placed below the previously ejected paper. However, there is a problem in that the sheet of paper cannot be easily inserted. Therefore, the present invention relates to the above-mentioned conventional techniques (J01) to (J04).
The purpose of this is to print relatively inexpensively, there is no need for complicated page realignment after printing, and after the second sheet on the bottom of already ejected sheets. To provide a sheet discharge device capable of easily inserting the sheet.

[0006]

Means for Solving the Problems The inventors of the present invention have made extensive studies to solve the above problems, and as a result, have confirmed that the above objects can be achieved by adopting the following constitution. is there. (First Invention) That is, the first invention of the present application is a sheet discharge device (H) for accommodating sheets (Si) which are sequentially discharged from the discharge roller (16) with the printing surface facing upward, in the following manner. Fixed sheet placing surface (21a) on which the sheet (Si) ejected from the sheet ejecting device (H), (Y01) ejecting roller (16) is characterized by having requirements
And slits (22b) extending in the width direction arranged in the sheet discharge direction on both sides of the fixed sheet placement surface (21a) in the width direction, and a movable sheet placement formed outside the slits (22b). Mounting member passage hole (22
When the fixed sheet placing member (21) having (a) and the (Y02) sheet (Si) are newly ejected onto the fixed sheet placing surface (21a), the sheet (Si) is ejected immediately before that. Fixed sheet mounting member (21) passing through the slit (22b) so as to be located under the sheet (Si)
And a movable sheet placing member (29) for lifting the lowermost surface of the sheet (Si) already discharged above the movable sheet placing member (29) below the fixed sheet placing member (21). Is moved to the inner position near the center in the width direction, and the movable sheet mounting member (2
9) the slit (2) of the fixed sheet placing member (21)
2b) is moved from the lower side to the upper side, and the movable sheet placing member (2) is provided above the fixed sheet placing member (21).
9) is moved to the movable sheet placing member passing hole (22a) on the outer side in the width direction, and the fixed sheet placing member (21) is moved.
Movable sheet placing member moving device (23
~ 33, 43-48), (Y04) The movable sheet placing member (29) when moved to the upper side of the fixed sheet placing member (21) is placed on the fixed sheet placing surface (21a). Sheet (Si) discharged from the discharge roller (16)
Have been arranged to form a space that can be accommodated.

(Embodiment 1 of the first invention) Embodiment 1 of the sheet discharging apparatus (H) of the first invention of the present application has the following requirements in the sheet discharging apparatus (H) of the first invention. (Y001) In the movable sheet placing member moving device, the slider (24) is moved in the width direction of the fixed sheet placing member (21) by driving the forward / reverse rotation motor.
Further, the slider (24) has a movable sheet placing member elevating mechanism (26 to 28) for supporting the movable sheet placing member (29) so as to be able to move up and down.

(Embodiment 2 of the first invention) Embodiment 2 of the sheet discharging apparatus (H) of the first invention of the present application has the following requirements in the sheet discharging apparatus (H) of the first invention. (Y002) In the movable sheet placing member moving device, the movable sheet placing member (29) includes a first guided pin (47) and a second guided pin (47) provided at two positions apart from each other in the width direction of the movable sheet placing member (29). The elliptical first guide groove (44) and the linear second guide groove (45) for guiding the guided pin (48), respectively, and the first guided pin (47) are connected to the first guide groove (44). ) Along with the second guided pin (48) to reciprocate along the second guide groove (45).

(Third Embodiment of First Invention) A third embodiment of the sheet discharging device (H) of the first invention of the present application has the following requirements in the sheet discharging device (H) of the first invention. (Y003) The cross section of the movable sheet placing member (29) passing upward through the slit (22b) and downward through the movable sheet placing member passing hole (22a). (Y004) The movable sheet placing member moving device is constituted by a device for rotationally driving the movable sheet placing member (29), that is, a rotary drive device. Was it.

(Second Invention) Further, the sheet discharging device (H) of the second invention of the present application accommodates the sheets (Si) which are sequentially discharged from the discharging roller (16) with the printing surface upwards. In the sheet discharging device (H), the movable sheet mounting member (Y05) capable of moving up and down for mounting the sheet (Si) discharged from the discharging roller (16) is characterized by having the following requirements. 64) and (Y06) are arranged above the outer side of the movable sheet placing member (64) so as to face each other and come closer toward each other, and the sheet (Si) can be moved from the lower side to the upper side. Although there is a pair of leaf springs (63) and (Y07) that can prevent the sheet (Si) from falling, the movable sheet mounting member (6)
4) is a sheet (S) discharged from the discharge roller (16).
Movable sheet placing member moving device (65a, 6) for moving between the lower position for receiving i) and the upper position for moving the received sheet (Si) above the leaf spring (63).
6).

(Third Invention) Further, the sheet discharging device (H) of the third invention of the present application accommodates the sheets (Si) which are sequentially discharged from the discharging roller (16) with the printing surface facing upwards. The sheet discharging device (H) has a fixed sheet mounting surface (71a) on which the sheet (Si) discharged from the (Y08) discharging roller (16) is mounted, characterized by having the following requirements. Fixed sheet mounting member (71),
(Y09) Sheet (Si) is the fixed sheet mounting surface (71
a) When newly discharged onto the top, the lower surface of the already discharged sheet (Si) is lifted and the newly discharged sheet (Si) is discharged below the already discharged sheet (Si). As described above, the spacer (74) forming a gap between the already discharged sheet (Si) and the fixed sheet placing member (71), (Y010) the newly discharged sheet (S).
Spacer moving devices (77a to 77a) for moving the spacer (74) in the sheet discharging direction according to the movement of the tip of i).
8).

(Embodiment 1 of the third invention) Further, Embodiment 1 of the sheet discharging apparatus (H) of the third invention of the present application is the third embodiment.
In the sheet discharging device (H) of the invention, the following requirements are met: (Y005) The spacer (7)
4) is composed of a cylindrical member rotatable about an axis extending in the width direction of the sheet (Si).

(Embodiment 2 of the third invention) Further, Embodiment 2 of the sheet discharging device (H) of the third invention of the present application is the third embodiment.
In the sheet discharging device (H) according to the first embodiment of the invention or the third invention, the following requirements are satisfied: (Y006) The fixed sheet mounting member (71) is the fixed sheet mounting surface. (71a) having slits (72) formed separately along the width direction and extending in the sheet discharge direction, (Y007) the spacer (74) is disposed above the fixed sheet mounting member (71). Has a spacer upper part and a spacer lower part arranged on the lower side, and is arranged vertically penetrating the slit (72),
(Y008) Spacer moving devices (77a to 78) for moving the spacer (74) in accordance with the movement of the tip of the newly discharged sheet (Si) are arranged below the fixed sheet mounting surface (71a). And moving the spacer (74) along the slit (72).

(Embodiment 3 of the third invention) Embodiment 3 of the sheet discharging device (H) of the third invention of the present application is the following in the sheet discharging device (H) of embodiment 2 of the third invention. (Y009) formed on the front end side in the discharge direction of the slit (72) for moving the upper part of the spacer from the upper side of the fixed sheet mounting surface (71a) to the lower side. Spacer lowering hole (72a) and the slit (7a) for moving from the lower side to the upper side.
2) Spacer raising hole (72b) formed on the rear end side in the discharge direction, (Y0010) Spacer moving device (77a-
78 is a fixed sheet mounting surface (71
The sheet is moved in the sheet discharging direction along the slit (72) when it is arranged on the upper side of a), and is moved to the side opposite to the sheet discharging direction when it is arranged on the lower side, and the upper part of the spacer is lowered by the spacer. The fixed sheet placing surface (71a) is moved from the upper side to the lower side by the hole (72a), and the spacer raising hole (72b) is moved from the lower side to the upper side of the fixed sheet placing surface (71a). Was configured as.

[0015]

Next, the operation of the present invention having the above characteristics will be described. (Operation of the First Invention) According to the sheet discharging device (H) of the first invention of the present application, in the image recording device such as a printer or a copying machine that discharges with the printing surface of characters, graphics, etc. facing upward,
The sheet (Si) (transfer material) already discharged onto the fixed sheet placing member (21) by the movable sheet placing member (29) that vertically passes through the slit (22b) for each print.
The lowermost surface of the sheet is lifted to retract the sheet (Si) already discharged from the fixed sheet placing member (21). By this retracting operation, a gap is created between the discharged sheet (Si) and the fixed sheet placing member (21), and the sheet (Si) newly discharged after the second sheet is already discharged ( It is inserted under Si). Therefore, the sheet (S) already discharged by the movable sheet mounting member (29) is
i) Since the whole is retracted to a position where it does not interfere with the fixed sheet placing member (21), each sheet (Si) discharged after the second sheet is affected by the own weight of the already discharged sheet (Si). Never receive. This movable sheet mounting member (2
Since the evacuation operation of 9) is continuously performed for each print,
Sheets already discharged in continuous printing (Si)
It is possible to easily insert the second and subsequent sheets (Si) on the lower side.

The operation of each embodiment of the sheet discharging device (H) of the first invention will be briefly described below.
It looks like this: (Operation of Embodiment 1 of First Invention) Embodiment 1 of First Invention
According to the sheet discharging device (H), the movable sheet mounting member (29) moves to the back surface side (widthwise inner side) of the sheet (Si) already discharged by the forward rotation of the motor (i), (Ii) Movable sheet placing member lifting mechanism (26 to 28)
Is moved up through the slit (22b), and (iii) is moved in a direction (outer in the width direction) to separate from the sheet (Si) lifted by the reverse rotation of the motor, and (iv) the movable sheet placing member elevating mechanism. (26-28) allows slits (2
Pass 2b) and descend. By repeating these series of operations continuously, the already discharged sheet (Si)
The entire sheet is lifted and discharged from the second sheet onward (S
The sheet is retracted to a position where it does not interfere with i), and a gap is formed between the sheet (Si) lifted on the movable sheet placing member (29) and the fixed sheet placing member (21). Meanwhile, the newly printed sheet (Si) is discharged onto the fixed sheet placing member (21). Then, the sheet (Si) lifted up from the movable sheet placing member (29) is dropped and superposed on the newly discharged sheet (Si), and the movable sheet placing member (29) is It goes down through the slit (22b).

(Operation of Embodiment 2 of First Invention) According to the sheet discharging device (H) of Embodiment 2 of the first invention, the first pin is moved along the first hole by the drive control of the motor or the like. The second pin reciprocates along the second hole every one rotation, and while the movable sheet placing member (29) moves in the direction (width direction) traversing the sheet discharge tray, The fixed sheet placing member (21) having the slits (22b) is arranged so as to be retractable. Therefore, similarly to the first embodiment, the already discharged sheet (Si) is lifted by the rise of the movable sheet placing member (29), and a gap is created between the sheet and the fixed sheet placing member (21). Meanwhile, the newly discharged sheet (Si) is discharged onto the fixed sheet placing member (21). Subsequently, when the movable sheet placing member (29) passes through the slit (22b) and descends, the sheet (Si) lifted on the movable sheet placing member (29) is newly discharged ( Si) is overlaid on top.

(Operation of Embodiment 3 of the First Invention) According to the sheet discharging apparatus (H) of the embodiment 3 of the first invention, the movable sheet placing member (29) is a cross-shaped member rotated by the drive of the motor. Each time the cross-shaped rotary member is rotated by 90 °, the sheet (Si) already discharged while narrowing the interval between the tips is lifted by the cross-shaped rotary member and a sheet to be newly printed ( Si) is discharged onto the fixed sheet placing member (21). When the sheet is further rotated, the sheet (Si) that has already been ejected falls and the sheet (S) that has already been ejected drops while widening the distance between the tips of the cross-shaped rotating body.
i) Overlaid on top.

(Operation of Second Invention) According to the sheet discharging device (H) of the second invention of the present application, the leaf spring (63) moves the seat (Si) from the lower side to the upper side due to its posture and elastic deformation. However, the sheet (Si) cannot drop from the upper side to the lower side. Therefore, when the movable sheet mounting member (64) is moved up and down, the already discharged sheet (Si) is lifted up to the position where the leaf spring (63) acts. Subsequently, when the movable sheet placing member (64) is lowered, the already discharged sheets (S
A gap is created between i) and the fixed sheet placing member, so that the sheet (Si) newly discharged after the second sheet can be easily inserted below the already discharged sheet (Si).

(Operation of Third Invention) According to the sheet discharging device (H) of the third invention of the present application, in a printer or the like which discharges with the printing surface facing upward, the discharged sheet (Si) for each print. A spacer (74) for supporting the back surface of the already discharged sheet (Si) is arranged between the lowermost surface of the sheet and the fixed sheet mounting member (71). This spacer (7
4), a gap is created between the already discharged sheet (Si) and the fixed sheet placing member (71), and the second and subsequent discharged sheets (Si) are already discharged (Si).
Is inserted below. Further, the spacer (74) moves in contact with the back surface of the already discharged sheet (Si) on the upper side of the fixed sheet placement surface (71a), and the already discharged sheet (Si) in the sheet (Si) discharging direction. ) And the fixed sheet placing member (71) are sequentially formed, each sheet (Si) discharged after the second sheet is less affected by the weight of the already discharged sheet (Si). To be done.
Moreover, since the gap is continuously formed for each print, the second and subsequent sheets (Si) can be easily inserted below the already discharged sheet (Si) in continuous printing. .

(Operation of the first embodiment of the third invention) According to the sheet discharging device (H) of the first embodiment of the third invention of the present application, it is rotatable about an axis extending in the width direction of the sheet (Si). The spacer (74) composed of a cylindrical member is
It is possible to rotate while moving in the sheet discharge direction on the lower surface of the already discharged sheet (Si). Therefore, it is possible to prevent the sheet (Si) placed on the spacer (74) from being moved by being dragged by frictional contact due to the movement of the spacer (74).

(Operation of Embodiment 2 of Third Invention) According to the sheet discharging device (H) of Embodiment 2 of the third invention of the present application, the spacer (74) has the upper part of the spacer mounted on the fixed sheet. Below the fixed sheet placing surface (71a) in a state where it is arranged above the placing member (71) and the lower part of the spacer penetrates the slit (72) and is arranged below the fixed sheet placing member (71). It is moved along the slit (72) by the spacer moving device (77a to 78) arranged at. On the upper part of the spacer, the rear end of the already discharged sheet (Si) is placed and a gap is created between the sheet and the fixed sheet placing member (71). In this state, when the sheet (Si) is newly discharged, the leading end of the sheet (Si) passes through the gap and the spacer upper portion of the spacer (74) (the spacer portion arranged above the fixed sheet mounting member (71)). Sheets that have already been discharged (S
While moving under the back surface of i), it moves linearly in the same direction as the discharge direction of the sheet (Si). And the spacer (7
When 4) moves to the tip of the sheet ejection tray,
At the same time when the entire sheets (Si) are overlaid, the spacer (74) moves in the opposite direction and returns to the original state.

(Operation of Embodiment 3 of Third Invention) According to the sheet discharging device (H) of Embodiment 3 of the third invention, as a spacer (74), up to the tip of the fixed sheet placing member (71). When it moves, it separates from the sheet (Si), then passes through the spacer lowering hole (72a) and moves below the fixed sheet mounting member (71). The spacer (74) moves below the fixed sheet mounting member (71) toward the rear end side in the sheet discharge direction, passes through the spacer raising hole (72b), and moves to the upper side of the fixed sheet mounting member (71). To do. And
The original state in which the rear end of the already discharged sheet (Si) is placed is restored.

[0024]

EXAMPLES Examples of the present invention will now be described with reference to the drawings, but the present invention is not limited to the following examples. (Embodiment 1) In FIG. 1, an image forming apparatus U has a laser scanning system U1. The laser scanning system U1 includes a semiconductor laser oscillator 1 as a laser light source, a collimator lens 2 that collects a laser beam L from the semiconductor laser oscillator 1 and collimates the laser beam L, and a beam from the collimator lens 2 in a scanning direction. From a polygon mirror 3 for deflecting, a convex lens 4 for projecting and irradiating the deflected laser beam L onto a photosensitive drum (that is, a latent image carrier) K, a cylindrical mirror 5 for correcting the surface tilt of the polygon mirror 3, and the like. It is configured. The laser scanning system U1 is connected to an image processing device (not shown) for sending an image information signal to the semiconductor laser oscillator 1.

Around the photosensitive drum K, a charger (charging roller) 6 for charging the surface of the photosensitive drum K is arranged. Further, around each of the photosensitive drums K, a developing device 7 containing toner and a toner image on the photosensitive drums K are sequentially transferred from a charging device 6 to a sheet (transfer material) in the drum rotation direction. A transfer device (transfer roller) 8, a cleaner 9 for removing the residual toner on the photosensitive drum K, and a static eliminator (static elimination roller) 10 for removing the residual charge on the photosensitive drum K. It is arranged.

The paper feed tray 11 which can be pulled out outward and inserted inward contains sheets Si. A paper feed roller 12 as a paper carry-out member is arranged above the paper feed tray 11. The paper Si accommodated in the paper feed tray 11 is carried out by the paper feed roller 12 and transferred to the transfer device 8 at the same timing as the operation of the laser scanning system U1.
And the portion where the photosensitive drum K faces (toner image transfer portion) B
To be transported. A chute member 13 is provided between the paper feed roller 12 and the toner image transfer section B. The chute member 13 is composed of a pair of upper and lower guide plates. The sheet Si that has passed through the toner image transfer section B is conveyed to the fixing device 15 along the guide 14 and discharged from the discharge roller 16 to the discharge tray H.

The operation of the laser printer will be described with reference to FIG. 1. First, the surface of the photosensitive drum K is uniformly charged by the charger 6, and the laser scanning system U1 statically moves the surface of the photosensitive drum K to a predetermined position. A latent image is formed. Next, when the electrostatic latent image is located at the developing portion facing the developing device 7 as the photosensitive drum K rotates, the developing device 7
The toner filled inside is attached to the surface of the carrier 1 to form a toner image. The photoconductor drum K rotates further,
When the toner image is positioned at the toner transfer portion B between the photoconductor drum K and the transfer device 8, the sheet Si is fed from the paper feed tray 11 in synchronization with this, and the toner image on the photoconductor drum K is fed to the sheet Si. Transcribed on. After transfer, sheet Si
Is conveyed to the fixing device 15, and the toner image is fixed. On the other hand, the toner remaining on the photosensitive drum K after the transfer process is cleaned by the cleaner 9. After that, the photoconductor drum K is discharged by the charge eliminator 10 and then uniformly charged by the charger 6. After that, the same steps as described above are repeated to output a plurality of continuous prints. The sheet Si on which the toner image is fixed is discharged to the sheet discharging device H.

Next, the sheet discharging device H of the present invention will be described. FIG. 2 is a perspective view of a fixed sheet placing member and a movable sheet placing member of the sheet discharging device according to the first embodiment of the present invention. FIG. 3 is an explanatory diagram of a device for moving the movable sheet placing member (that is, a movable sheet placing member moving device). FIG. 4 shows the movable sheet placing member moving device of FIG.
It is the figure seen from IV. 2 and 3, the sheet discharging device H has a bottom plate 20a, side plates 20b and 20c standing upright on both side ends thereof, and a fixed sheet placing member 21 provided between the side plates 20b and 20c. . The side plates 20b and 20c are provided on both sides of the fixed sheet placing member 21.
Elongated sheet-like member passing hole 2 which is elongated along
A hole 22 having 2a and a plurality of slits 22b extending in the width direction (direction perpendicular to the sheet discharging direction) is formed along the inner edge of the movable sheet placing member passing hole 22a. . Further, guide rod fixing members 23, 23 are attached to both lower portions of the side plates 20b, 20c. A guide rod 25, which slidably supports the pair of sliders 24, 24, is fixed by the guide rod fixing members 23, 23.

The tip of the rod 2 is provided on the side of each slider 24.
A solenoid 26 is provided for expanding and contracting 6a by excitation and demagnetization, and a bent first arm 27 is attached to the tip of the rod 26a. Also,
The bending portion of the first arm 27 and the end portion of the second arm 28 are pivotally attached to the upper end portion of the slider 24, and each arm 27,
The other end of 28 is pivotally attached to the lower surface of the movable sheet mounting member 29 via a bracket. The movable sheet placing member 29 is made of a plate-like member having a similar shape to that of the hole 22, and the fixed sheet placing member 2 passes through the hole 22.
It is arranged above and below the unit 1. Further, the bottom surface of each slider 24 is fixed on a moving belt 31 which is stretched around the pulleys 30a and 30b.
As shown in FIG. 4, the gears 3 a and 30a mesh with each other.
2, 32 are provided, and the other pulley 30a is also rotated with the rotation of one pulley 30a which is rotationally driven by the forward / reverse rotation motor 33.

(Operation of First Embodiment) The operation of the sheet discharging device H in the first embodiment will be described. When the laser printer shown in FIG. 1 continuously prints a plurality of objects to be copied with the printing surface facing upward, the sheet discharging device H does not show each time the sheet Si is discharged onto the fixed sheet placing member 21. The controller drives the forward / reverse rotation motor 33 to slide the sliders 24, 24 in the left-right direction, and excites and demagnetizes the solenoid 26 to raise and lower the movable sheet placing member 29. That is, when the first sheet Si is discharged onto the fixed sheet mounting member 21, the motor 33 is first rotated in the normal direction according to the size of the sheet Si, and the sliders 24 and 2 are moved along with the movement of the moving belt 31.
4 slides toward the center of the sheet ejection device H. Then, when the solenoid 26 is excited, the rod 26a is extended and the lower end portion of the first arm 27 is pushed, and accordingly, the bending portion of the first arm 27 and the lower end portion of the second arm 28 are pushed. Each arm 27, 28 stands up as a fulcrum, and the pair of movable sheet mounting members 29, 29 pass through the hole 22 formed by the movable sheet mounting member passing hole 22a and the plurality of slits 22b, and the sheets are mutually seated. Ejector H
Then, the rear surface of the sheet Si ejected onto the fixed sheet placing member 21 is lifted up while the space is slightly narrowed toward the center of the sheet Si.

In this way, when the already discharged sheet Si is lifted and retracted, the movable sheet mounting members 29, 2 are
A gap is created between the sheet Si on the sheet 9 and the fixed sheet placing member 21, and a newly printed sheet Si is discharged onto the fixed sheet placing member 21. Further on, motor 3
When 3 is rotated in the reverse direction and the sliders 24, 24 are respectively slid toward the outer ends of the sheet discharging device H in the width direction, the lifted sheet Si falls onto the newly discharged sheet Si and both sheets are discharged. Si are overlaid in page order. When the solenoid 26 is demagnetized immediately after the motor 33 is rotated in the reverse direction, the rod 26a at the tip of the solenoid 26 expands, and the movable sheet placing members 29, 29 reversely move the sheet ejecting device H. Side plates 20b, 2 of
While slightly widening the space toward the 0c side, it descends through the hole 22 and moves below the fixed sheet placing member 21.

In the first embodiment, the motor 33 uses the sheet S
It is driven only when the distance between the movable sheet placing members 29, 29 is adjusted according to the size of i, and the above-described dropping of the sheet Si is caused by the demagnetization of the solenoid 26.
It may be performed during the descent of 9,29. As mentioned above,
By continuously repeating (i) forward rotation of the motor 33, (ii) excitation of the solenoid 26, (iii) reverse rotation of the motor 33, and (iv) demagnetization of the solenoid 26, the entire discharged sheet Si is The fixed sheet stacking member 21 of the sheet discharging device H can be retracted to a position where it does not interfere with the next discharged sheet Si, and each sheet Si discharged after the second sheet is the self-weight of the already discharged sheet Si. It is possible to print out a plurality of objects to be copied continuously in a predetermined page order without being affected by the above.

(Embodiment 2) FIG. 5 is an explanatory view of an entire sheet discharging apparatus H of Embodiment 2 of the present invention. FIG. 6 is an enlarged view of a main part, FIG. 6A is a sectional view thereof, and FIG. 6B is an operation explanatory view. The fixed sheet placing member 21, the movable sheet placing member passing hole 22a, and the hole 22 having the slit 22b have the same structure as that shown in FIG. 2 (Example 1). In FIG. 5, the cam plates 43, 43 are arranged in pairs in the width direction below the fixed sheet placing member 21 at both end portions of the sheet discharging device H. On the cam plate 43, the elliptical first guide groove 4 formed by two upper and lower parallel straight lines and two left and right circular arcs on the central side of the sheet discharging device H.
4 is formed, and a linear second guide groove 45 is formed on the side end portion side. The first guide groove 4
The shape of 4 can be an ellipse. Reference numeral 46 denotes a member having the same shape as that of the movable sheet placing member 29 of the first embodiment, and a lower surface thereof has a first guided pin 47 at a center portion in the width direction and a second guided pin 48 at a side portion thereof. Each is fixed. The guided pins 47 and 48 are engaged with the guide grooves 44 and 45, respectively. First pin 47
Although not shown in the drawing, the tip end of is connected to a drive wire (not shown) that moves while forming a loop having the same shape as the oval first guide groove 44. It moves along the first guide groove 44.

(Operation of Second Embodiment) Next, the operation of the sheet discharging device H of the second embodiment will be described. This sheet ejection device H
Is applied to a printer that prints a plurality of sheets with the printing surface facing upward, such as the laser printer shown in FIG. 1, as in the first embodiment, and every time the sheet Si is discharged onto the fixed sheet placing member 21. Firstly (the same applies to the following embodiments), the first pin 47 rotates once along the elliptical first guide groove 44 under the control of the drive motor of the drive wire. Figure 6A
The sheet Si already discharged on the fixed sheet placing member 21
6 shows a state in which the movable sheet placing member 46 is lifted up and a gap is created between the sheet Si and the fixed sheet placing member 21. In this state, when the sheet Si is newly discharged through the gap, a new sheet Si
Can be easily inserted below the already discharged sheet Si without being affected by the own weight of the already discharged sheet Si. When the motor continues to rotate from the above-mentioned state, the pair of movable sheet placing members 46, 46 is moved away from each other with the movement of the pins 47, 48 toward the widthwise end portions of the sheet discharging device H. The movable sheet mounting member 46 passes through the slit 22b and moves downward to the fixed sheet mounting member 21 while the first pin 47 moves in the arc portion of the first guide groove 44 near the side portion. Immerse (see Figure 6B). During this time, the already discharged sheet Si is separated from the movable sheet mounting members 46, 46 and is superposed on the newly discharged sheet Si.

From this state, the pins 47 and 48 move to the central portion side of the sheet discharging device H, and the pair of movable sheet placing members 46 and 46 move to the central portion side while narrowing the interval accordingly. To do. Then, while the first pin 47 moves in the arc portion near the center of the first guide groove 44, the movable sheet placing member 46 lifts the next sheet Sib discharged through the slit 22b. It rises above the fixed sheet placement member 21 (FIG. 6A). As described above, in the second embodiment, the first guided pin 47 that engages with the first guide groove 44 is made to go around the guide groove 44 once, and the second pin 48 attached thereto is moved to the second guide. Groove 4
Reciprocate along 5. Then, by repeating these operations continuously, the entire discharged sheet Si is lifted by the movable sheet placing member 46, and the sheet Si newly ejected to the fixed sheet placing member 21 of the sheet ejecting device H. Each sheet Si ejected from the second sheet onward is not affected by the self-weight of the already ejected sheet Si, and a plurality of objects to be copied are set to a predetermined position with the printing surface facing upward. You can print in page order and continuously.

(Embodiment 3) FIG. 7 is an explanatory view of an entire sheet discharging apparatus H of Embodiment 3 of the present invention. The fixed sheet placing member 21 and the movable sheet placing member passing hole 22 are provided.
The hole 22 having a and the slit 22b has the same structure as that shown in FIG. 2 (Example 1). In FIG. 7, the rotary shaft 5 is provided along the movable sheet placing member passing hole 22a.
3, 53 are provided, and both ends thereof are supported by bearings. The same number of cross-shaped rotating bodies (movable sheet mounting members) 55 as the slits 22b are fixedly mounted on the rotary shaft 53, and the columnar member 55a forming the cross-shaped rotating body 55 is always arranged with respect to the slits 22a. It is arranged so as to be located above and below. The rotation shaft 53, to which the cross-shaped rotating body 55 is fixedly mounted, is rotationally controlled by a motor and a control device (not shown). The columnar member 5
The length of 5a is shorter than the width of the entire hole 22, and the columnar member 5
The width of 5a is shorter than the width of the slit 22b.

(Operation of Third Embodiment) Next, the operation of the sheet discharging apparatus of the third embodiment will be described. This sheet ejector
Each time the sheet Si is discharged to the sheet discharge tray H, the cross-shaped rotating bodies 55, 55 rotate 90 ° in the arrow direction by the rotation of the motor driven by the signal from the control device. In FIG. 7, the sheet Si already discharged on the fixed sheet placing member 21 is lifted by the rotation of the cross-shaped rotary members 55, 55, and the sheet Si and the fixed sheet placing member 21 are moved.
It shows a state in which a gap is created between the two. When the sheet Si is newly discharged in this state, the newly discharged sheet Si is easily inserted below the sheet Si without being affected by the weight of the already discharged sheet Si. Then, by further rotating the rotating bodies 55, 55, the newly inserted sheet Si is lifted, and at the same time, the already-lifted sheet Si is struck by the columnar members 55a on both sides.
55a, as the distance between them increases, the rotor 5
The sheets Si fall off the sheets 5, 55 and fall on the newly inserted sheet Si, and the sheets Si are superposed. in this way,
By continuously rotating the rotating bodies 55, 55, the newly discharged sheet Si can be inserted below the already discharged sheet Si.

(Embodiment 4) FIG. 8 is a perspective view of a sheet discharging apparatus according to Embodiment 4 of the present invention, and FIG. 9 is a front view thereof. 8 and 9, the fixed sheet placing member 61 has a movable sheet placing member accommodation hole 61a. Further, on the lower surface of the fixed sheet placing member 61, the guide columns 61
A plurality of (for example, four) b are provided. The guide columns 61b are formed with guide surfaces that are flush with the inner surfaces on both sides in the width direction of the movable sheet placing member accommodation hole 61a.
A side plate 62 is provided on the widthwise outer side of the fixed sheet placing member 61.
A and 62b are provided along the sheet discharge direction. Leaf springs 63, 63 are arranged at the widthwise outer side of the fixed sheet placing member 61 along the side plates 62a, 62b so as to stand toward the central portion.

On the other hand, the movable sheet placing member accommodation hole 61
A movable sheet placing member 64, which is slightly smaller than a, is arranged in the fixed sheet placing member 61 so as to be retractable. The movable sheet placing member 64 has its outer edge portion on the upper surface rounded by chamfering. Guided walls 65, 65 extending downward are provided on both sides of the movable sheet placing member 64 in the width direction (direction perpendicular to the sheet discharging direction). The outer side surface of the guided wall 65 is vertically guided by the inner side surfaces of the movable sheet placing member accommodation hole 61a and the guide column 61b. A rack 65a is formed on a part of the guided wall 65 and meshes with a pinion 66 driven by a motor (not shown). Therefore,
The movable sheet placing member 64 can be moved up and down by driving a pinion with the motor (not shown).

(Operation of Fourth Embodiment) Next, the operation of the sheet discharging device of the fourth embodiment will be described. This sheet ejector
As shown in FIGS. 8 and 9, a movable sheet placing member 64 for lifting the already discharged sheet Si and a pair of leaf springs 63, 63 for preventing the sheet Si from falling are provided. The leaf springs 63, 63 have the seat S depending on their posture and elastic deformation.
When i moves from the lower side to the upper side, it is curved in the direction of the arrow to allow passage of the sheet Si, but conversely, the sheet Si has a structure that prevents the sheet Si from falling from the upper side to the lower side. Therefore, each time the sheet Si is discharged onto the fixed sheet placing member 61 and the movable sheet placing portion 64, the pinion 6 is ejected.
When 6 is operated to move the movable sheet placing member 64 up and down, the already discharged sheet Si is moved up from the fixed sheet placing member 61 to the position above the leaf springs 63, 63 due to the rise of the movable sheet placing member 64. Can be lifted. Sheet Si
After the sheet is placed on the leaf springs 63, 63, the movable sheet placing member 64 descends and is accommodated in the movable sheet placing member accommodation hole 61a of the fixed sheet placing member 61. In this state, the sheet S supported by the leaf springs 63, 63
A gap for discharging a new sheet Si is formed between i and the upper surfaces of the fixed sheet mounting member 61 and the movable sheet mounting member 64, and the second and subsequent newly discharged sheets Si are discharged.
Can be easily inserted under the already discharged sheet Si without hindering its discharge. In this way,
By continuously elevating the movable sheet placing member 64,
You can make multiple prints while aligning the pages with the print side facing up.

(Embodiment 5) FIG. 10 is a perspective view of a sheet discharging device according to a fifth embodiment of the present invention, and FIGS.
FIG. 1C is an operation explanatory view of the sheet ejection device shown in FIG. 10. The sheet discharging device H has fixed sheet placing members 71 supported by side plates 70a, 70a provided on both sides in the width direction. The guide rod support wall 70 is provided at both front and rear ends of the fixed sheet placing member 71 in the sheet discharging direction.
b and 70b (see FIG. 11A) are provided. The guide rod 70c is fixed by the guide support walls 70b and 70b. A sheet placing surface 71a is formed on the upper surface of the fixed sheet placing member 71, and elongated rectangular slits 72 are formed on both sides in the width direction along the side plates 70a, 70a (along the sheet discharging direction). 72 is formed. In addition, the bracket 7 is provided at the bottom of the side plates 70a, 70a.
3, 73 are attached, and the fixed sheet placing member 7
A guide rod 70c for slidably supporting the spacers 74, 74 moving above 1 is fixed. Spacer 74
Has a mushroom shape, and a lower part has a prismatic shape and extends downward through the slit 72. The lower portion of the spacer 74 has a hole through which the guide rod 70c passes, and the guide rod through hole is used as the guide rod 70.
It is designed to slide while it is fitted in c.

On the rear end side of the fixed sheet placing member 71 in the sheet discharge direction, that is, on the discharge roller 16 side of FIG. 11,
A stopper plate 76 lower than the upper part of the spacers 74, 74, that is, the mushroom-shaped part is provided. Further, the lower end of each spacer 74 is fixed to a moving belt 78 which is wound around pulleys 77a and 77b, and the pulley 77a is rotationally driven by a drive motor (not shown). A spacer moving device is composed of the guide rod 70c, the pulleys 77a and 77b, the moving belt 78, a motor (not shown) for driving the moving belt 78, and the like.

(Operation of Fifth Embodiment) Next, the operation of the sheet ejection device of the fifth embodiment will be described. This sheet ejector
By moving the moving belt 78, the spacers 74, 74 are reciprocated. FIG. 11A shows a state in which the rear end of the first sheet Si is placed on the spacer 74 and a gap is created between the sheet and the fixed sheet placing member 71.
In this state, when the second sheet Si is newly discharged from the discharge roller 16 and the leading end of the second sheet Si passes through the gap and is placed on the spacer 74, the moving belt is synchronized with the subsequent movement of the sheet Si. Move 78. The spacer 74 fixed to the moving belt 78 is used for the already discharged sheet Si.
While moving under the back surface of the sheet Si, the sheet Si moves linearly in the same direction as the discharging direction of the sheet Si located below the sheet Si (see FIG. 11B).

Subsequently, the pair of spacers 74 moves and moves to the front end of the sheet discharging device H (see FIG. 11C). At this time, the first sheet Si is the second sheet Si
The tops of the sheets Si are placed on top of the spacers 74 (mushroom-shaped portions) while being superposed on top of each other. Next, when the belt 78 is moved in the opposite direction, the spacers 74, 7
Reference numeral 4 returns to the rear end side of the fixed sheet mounting member 71 in the sheet discharging direction while sunk into the back surface of the sheet Si (FIG.
reference). When the spacer 74 moves to the discharge roller 16 side, the already discharged sheet Si also tries to move due to the frictional force, but the movement is stopped by the stopper plate 76. In this way, the sheets discharged after the second sheet can be easily inserted to the lower side without being affected by the own weight of the already discharged sheets. Therefore, by continuously reciprocating the mushroom-shaped spacers 74, 74, a plurality of prints can be performed while aligning the pages with the printing surface facing up.

(Sixth Embodiment) Next, a sixth embodiment of the sheet processing apparatus of the present invention will be described with reference to FIGS. FIG.
2 is a perspective view of the sheet ejection device of the sixth embodiment. FIG.
FIG. 13 is a horizontal cross-sectional view of the main parts of the sheet discharging device according to the sixth embodiment. In the description of the sixth embodiment, constituent elements corresponding to those of the fifth embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. Example 6 is different from Example 5 in the following points, but is different from Example 5 in other points.
Is configured similarly to. (S01) A spacer descending hole for moving the mushroom-shaped upper portion of the spacer 74 from the upper side to the lower side of the fixed sheet mounting member 71 at the front end side of the slit 72 in the discharging direction similar to the fifth embodiment. 72a is formed and the slit 72 is formed.
A spacer raising hole 72b for moving the fixed sheet placing member 71 from the lower side to the upper side is formed on the rear end side in the discharging direction. (S02) The guide rod 70c of the fifth embodiment is omitted and a belt guide 70d is provided.

(Operation of Sixth Embodiment) Next, the operation of the sheet discharging device of the sixth embodiment will be described. This sheet ejector
By rotating the moving belt 78, the spacer 74 is rotated counterclockwise along the belt guide 70d. That is, the rear end of the first sheet Si is placed on the mushroom-shaped upper portion of the spacer 74 as in the case of the fifth embodiment, and a gap is formed between it and the fixed sheet placing member 71. In this state, when the second sheet Si is discharged from the discharge roller 16 and the leading end thereof is passed through the gap and placed on the mushroom-shaped upper portion of the spacer 74, the spacer 74 has the same sheet discharge speed. While moving underneath the back surface (lower surface) of the already discharged sheet Si at the moving speed, it moves in the direction of the spacer lowering hole 72a together with the newly discharged sheet Si. At this time, the already discharged sheet Si is superposed on the newly discharged sheet Sib.

The spacer 74 moves away from the sheet Si to the lower side of the fixed sheet placing member 71, and further from the spacer raising hole 72b at the rear end side of the slit 72 in the sheet discharging direction to the upper side of the fixed sheet placing member 71. Move to. Then, the spacer 74 places the rear end of the already discharged sheet Si on the mushroom-shaped upper portion, and returns to the original state. In this way, the sheets Si ejected after the second sheet are
Can be easily inserted to the lower side of the discharged sheet Si without being much affected by the own weight of the discharged sheet Si. Therefore, a spacer 74 having a mushroom-shaped top
By continuously moving the sheet in the counterclockwise direction, continuous printing can be performed while aligning pages with the printing surface of the sheet Si facing upward.

(Seventh Embodiment) Next, a seventh embodiment of the sheet processing apparatus of the present invention will be described with reference to FIGS. FIG.
4 is a perspective view of the sheet ejection device of the seventh embodiment. FIG.
FIG. 14 is a lateral cross-sectional view of the main parts of the sheet discharging device according to the seventh embodiment. In the description of the seventh embodiment, constituent elements corresponding to those of the fifth embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. Example 7 is different from Example 5 in the following points, but is different from Example 5 in other points.
Is configured similarly to. (S03) Mushroom-shaped spacer 74 in the upper part of the fifth embodiment
Instead of the above, a roller-shaped spacer 74 rotatably supported by a slider 81 moving along the guide rod 70c and having an upper portion protruding above the slit 72 is used.

(Operation of Seventh Embodiment) Next, the operation of the sheet discharging apparatus of the seventh embodiment will be described. This sheet ejector
By rotating the moving belt 78, the roller-shaped spacer 74 is reciprocated in the sheet discharging direction along the guide rod 70c. That is, the rear end of the first sheet Si is placed on the upper part of the roller-shaped spacer 74 as in the fifth embodiment, and a gap is formed between the sheet and the fixed sheet placing member 71. In this state, when the second sheet Si is discharged from the discharging roller 16 and the leading end of the second sheet Si passes through the gap and is placed on the upper portion of the roller-shaped spacer 74, the spacer 74 has the same sheet discharging speed. While moving under the back surface (lower surface) of the already discharged sheet Si at the moving speed, it moves forward with the newly discharged sheet Si in the sheet discharging direction.

At this time, the already discharged sheet Si is superposed on the newly discharged sheet Sib. Since the roller-shaped spacer 74 of the seventh embodiment is rotatably supported, the roller-shaped spacer 74 can rotate when a force is received from the sheet due to frictional contact with the sheet placed on the upper portion. Therefore, it is possible to prevent the sheet, which comes into frictional contact when the spacer 74 moves, from being dragged by the spacer and moving. A sheet stopper is arranged at the front end of the upper surface of the fixed sheet mounting member 71 in the sheet discharge direction, and the spacer 74 is moved in the direction in which the sheet on the roller-shaped spacer 74 is moved toward the stopper when the spacer 74 is moved. By providing the rotation driving means for rotating, the sheet on the spacer 74 can be constantly pressed toward the stopper, and the sheet front end positions can be aligned.

(Embodiment 8) Next, Embodiment 8 of the sheet processing apparatus of the present invention will be described with reference to FIGS. FIG.
6 is a perspective view of the sheet ejection device of the eighth embodiment. FIG. 17
FIG. 16 is a lateral cross-sectional view of the main parts of the sheet discharging device according to the eighth embodiment. In the description of the eighth embodiment, constituent elements corresponding to those of the seventh embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. Example 8 is different from Example 7 in the following points, but is different from Example 7 in other points.
Is configured similarly to. (S04) Instead of the slits 72 formed in the fixed sheet placing member 71 of the seventh embodiment, the slits 72 are formed in the opposite side surfaces of the side plates 70a, 70a of the double wall structure provided on both sides of the fixed sheet placing member, respectively. What I did. (S05) The guide rod 70c is provided inside the side plate 70a of the double wall structure instead of the guide rod 70c arranged below the fixed sheet placing member 71 of the seventh embodiment. (S06) The ejected sheet Si rotatably supported by the slider that moves along the guide rod 70c.
Cylindrical spacer 74 that extends over the entire width of the
Is configured to move in the sheet discharge direction along the upper side of the fixed sheet placing member 71. The eighth embodiment also has the same operation as the seventh embodiment.

(Modifications) The embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-mentioned embodiments, and is within the scope of the gist of the present invention described in the claims. Thus, various changes can be made. A modified embodiment of the present invention is illustrated below. (H01) Instead of the spacer 74 used in the fifth embodiment, it is possible to use a rod-shaped spacer having a mushroom-shaped cross section that extends over the entire length of the discharged sheet Si in the width direction. Note that the cross-sectional shape of the spacer may be an appropriate shape such as an elliptical cross-section, instead of the mushroom shape.

[0053]

The sheet discharging apparatus of the present invention has the following effects (E01) to (E03). (E01) According to the first and second inventions of the present application, which lifts the sheet already discharged by the movable sheet placing member,
The entire already ejected sheet is retracted to a position where it does not interfere with the newly ejected sheet on the fixed sheet stacking member, so that the sheet that has already been ejected is not affected by its own weight and It is possible to easily insert the sheet discharged to the. (E02) According to the third invention of the present application in which the spacer supports the back surface of the already ejected sheet, as the newly ejected sheet moves, the space between the already ejected sheet and the fixed sheet placing member is increased. Since the gaps are sequentially formed, the second and subsequent sheets can be easily inserted below the self-weight of the already discharged sheets without being affected much. (E03) As described above, page alignment can be performed with good operability in continuous printing in which sheets are discharged with the printing surface facing upward.

[Brief description of drawings]

FIG. 1 is an overall view of a laser printer equipped with a sheet ejection device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the sheet ejection device according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a device for moving a movable sheet placing member (that is, a movable sheet placing member moving device).

4 is a view of the movable sheet placing member moving device of FIG. 3 seen from an arrow IV.

FIG. 5 is a sectional view of a sheet discharging device according to a second embodiment of the present invention.

FIG. 6 is an operation explanatory view of the second embodiment.

FIG. 7 is an explanatory diagram of a third embodiment of the sheet ejection device of the present invention.

FIG. 8 is a perspective view of a fourth embodiment of the sheet ejection device of the present invention.

FIG. 9 is a front sectional view of the fourth embodiment.

FIG. 10 is a perspective view of a fifth embodiment of the sheet ejection device of the present invention.

FIG. 11 is an operation explanatory view of the fifth embodiment.

FIG. 12 is a perspective view of a sixth embodiment of the sheet ejection device of the present invention.

FIG. 11 is a longitudinal sectional view of a main part of the sixth embodiment.

FIG. 14 is a perspective view of a sheet discharging device according to a seventh embodiment of the present invention.

FIG. 15 is a vertical cross-sectional view of essential parts of the seventh embodiment.

FIG. 16 is a perspective view of an eighth embodiment of the sheet ejection device of the present invention.

FIG. 17 is a vertical cross-sectional view of essential parts of the eighth embodiment.

[Explanation of symbols]

H ... Sheet ejection device, Si ... Sheet, 16 ... Ejection roller, 21 ... Fixed sheet placement member, 21a ... Sheet placement surface, 22a ... Movable sheet placement member passing hole, 22b ... Slit, 24 ... Slider, 29 ... Movable sheet mounting member,
(23-33, 43-48) ... Movable sheet placing member moving device, (26-28) ... Movable sheet placing member lifting mechanism,
44 ... First guide groove, 45 ... Second guide groove, 47 ... First
Guided pin, 48 ... Second guided pin, 55 ... Rotating body with cross-shaped cross section, 63 ... Leaf spring, 64 ... Movable sheet placing member, (65a, 66) ... Movable sheet placing member moving device, 71 ... Fixed sheet mounting member, 71a ... Fixed sheet mounting surface, 72 ... Slit, 74 ... Spacer, (77a to 7)
8) ... Spacer moving device.

Front page continuation (72) Inventor Koichi Sato 2274 Hongo, Ebina City, Kanagawa Prefecture Fuji Xerox Co., Ltd.

Claims (3)

[Claims] 1. A sheet discharging device for accommodating sheets discharged in sequence with the printing surface facing upward from the discharging roller, the sheet discharging device having the following requirements: (Y01) discharging roller A fixed sheet placing surface on which the discharged sheet is placed, slits extending in the width direction that are arranged in a row along the sheet discharging direction on both sides in the width direction of the fixed sheet placing surface, and outside the slits are formed. A fixed sheet placing member having a movable sheet placing member passing hole, and (Y02) the lower side of the sheet ejected immediately before the sheet is newly ejected onto the fixed sheet placing surface. A movable sheet placing member that raises the lowermost surface of the sheet that has already been discharged above the fixed sheet placing member so as to be located at (Y03) the fixed sheet placing member. On the lower side, the movable sheet placing member is moved to an inner position near the center in the width direction, and at the inner position, the movable sheet placing member is moved from the lower side to the upper side of the slit of the fixed sheet placing member to be fixed. Movable sheet placing member moving device for moving the movable sheet placing member to the movable sheet placing member passage hole on the outer side in the width direction on the upper side of the sheet placing member and moving it to the lower side of the fixed sheet placing member. (Y04) The movable sheet mounting member when moved to the upper side of the fixed sheet mounting member is
The sheet is disposed on the fixed sheet mounting surface so as to form a space in which the sheet discharged from the discharge roller can be stored. 2. A sheet ejection device for accommodating sheets ejected from the ejection roller in sequence with the printing surface facing upward, the sheet ejection device having the following requirements: (Y05) ejection roller A vertically movable movable sheet placing member for placing the discharged sheet, (Y06) arranged so as to face each other above the outer side of the movable sheet placing member and approach each other as going upward; A pair of leaf springs (Y0 that can move the sheet to the upper side but can prevent the sheet from falling)
7) Movable sheet placing member moving device for moving the movable sheet placing member between a lower position for receiving the sheet discharged from the discharge roller and an upper position for moving the received sheet above the leaf spring. . 3. A sheet ejection device for accommodating sheets ejected from the ejection roller one after another with the printing surface facing upward, the sheet ejection device having the following requirements: (Y08) ejection roller A fixed sheet placing member having a fixed sheet placing surface on which the discharged sheet is placed,
(Y09) When a sheet is newly discharged onto the fixed sheet mounting surface, the lower surface of the already discharged sheet is lifted and the newly discharged sheet is discharged below the already discharged sheet. As described above, a spacer that forms a gap between the already discharged sheet and the fixed sheet placing member (Y01
0) A spacer moving device that moves the spacer in the sheet discharging direction according to the movement of the leading edge of the newly discharged sheet.