JPH05294536A - Image forming device - Google Patents

Abstract

PURPOSE:To increase the maintenance space of a discharge port when it is necessary and improve the operability and the safety by holding a sheet stacking part of an image forming device such as a micro-film reader printer in a swayable manner and at different angle. CONSTITUTION:A printing paper sheet (P) within a paper sheet feeding cassette 16 is fed through a reversing passage 17 or the like to a photosensitive drum 14 at the specified timing by means of a paper sheet feeding roller 26, and the enlarged toner image of a micro-film 1 is transferred thereon. The printing paper sheets (P) after completion of transfer are successively discharge and stacked on a discharged paper sheet tray 24 through a pair of paper sheet discharging rollers 20. When jamming or the like occurs and the paper sheet discharge port is opened, the locking condition is released by achieving the elastic deformation of a hook part 24b by manually depressing the tip on the left side of the paper sheet discharge tray 24, and the paper sheet discharge tray 24 is turned downward to retreat. A roller 20 and a separating claw 21 are made to retreat from a paper sheet passage by turning a supporting board 40 by operating an opening/closing lever in this condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus having an image forming section and a sheet stacking section for accommodating an image forming sheet discharged from the image forming section.

[0002]

2. Description of the Related Art Conventionally, there is a microfilm reader printer as an apparatus of this type.

A microfilm reader printer is a device for enlarging and projecting an image on a microfilm onto a screen and, if necessary, obtaining a copy print on paper.

In recent years, operability is also emphasized in the microfilm reader printer, and operations such as replenishment of print paper, confirmation of print images and takeout of print paper can be performed on the front surface of the apparatus. The microfilm reader printer shown in FIG. 12 has a print paper discharge port 10 for downsizing the device.
1 is arranged at the back of the apparatus, and a paper discharge tray 104 is arranged between the illuminating section 102 and the paper feed cassette take-out port 103 so that front paper supply and discharge can be performed.

When the paper is subjected to image fixing by the fixing roller 105, the toner on the paper is squeezed while being melted by heat, so that the paper easily sticks to the fixing roller 105. For that purpose, a separation claw 107 is provided in the paper discharge unit 106, and the front end is pressed against the fixing roller 105 to peel off the paper. However, if the separation failure occurs due to the dirt of the fixing roller 105, the thickness of the paper, the stiffness of the paper, or the like, a paper ejection port jam as shown in FIG. 13 often occurs. In addition, the fixing roller 105
A cleaning pad 10 for cleaning the roller is provided on the upper part of the
8, the cleaning pad 108 is regularly replaced, so that the fixing roller 105 can be prevented from being soiled, the image quality can be prevented from being deteriorated, and the discharge port jam can be reduced.

The above-described maintenance such as the discharge port jam and the replacement of the cleaning pad 108 can be performed from the front side by opening the discharge unit 106 as shown in FIG.

[0007]

However, in the above-mentioned conventional example, since the discharge port 101 is deep and a sufficient space cannot be secured, a discharge port jam as shown in FIG. 13 and a cleaning pad 108 of the fixing device are shown. However, there is a drawback that it is difficult and troublesome to carry out maintenance such as replacement. Furthermore, the temperature around the fixing device becomes high, which is dangerous. Further, in order to secure a space for maintenance, the paper discharge tray 10
The shape and angle of the stacking surface of No. 4 are restricted, and the stackability of paper deteriorates, which further causes a paper discharge failure or jam during the next printing.

The present invention is directed to overcoming the problems set forth above.

[0009]

According to the present invention, in an image forming apparatus having an image forming section and a sheet stacking section for accommodating an image forming sheet discharged from the image forming section, the sheet stacking section can be swung. By providing first holding means for holding the sheet stacking section and second holding means for holding the sheet stacking section at different angles, the maintenance and management of the sheet discharge section are facilitated, and the sheet stacking section is easily retracted and returned. It made it possible.

[0010]

1 to 3 show schematic views of a reader printer adopting the present invention.

1 is a microfilm, 2 is a projection lens,
3 is an illumination lamp. The illumination light of the illumination lamp 3 is guided to the microfilm 1 by the curved reflecting mirror 4 and the condenser lens 5. Then, the light transmitted through the microfilm 1 enters the machine casing 6 through the projection lens 2.

At the time of the reader, the incident light is sequentially reflected by the first mirror 7 → the second mirror 8 in the machine casing 6 and the image information of the microfilm 1 is magnified and imaged on the projection screen 9 on the front surface of the apparatus. It is projected and read from the outside of the screen 9.

On the other hand, at the time of printing, the first mirror 7 is rotated by the rotation of the first mirror 7 by the driving means (not shown).
The light reflected by the third mirror 10 → the fourth mirror 11 → the fifth mirror 12 in the machine casing 6 is sequentially reflected, reaches the photosensitive drum 14 through the slit 13, and the magnified image of the microfilm 1 is subjected to slit scanning exposure. To be done.

Next, the structure of the printer unit 15 will be described.

A printer unit 15 including the photosensitive drum 14 is disposed in the lower rear part of the machine casing 6, and in addition to the photosensitive drum 14, a detachable paper feed cassette 1 containing print paper P.
6, reverse conveyance path 17, fixing roller pair 18, and paper discharge section 19
Etc.

The paper feed cassette 16 which can be set from the front surface (left side in FIG. 1) of the machine casing 6 has a grip portion 16a at the front and is arranged at the bottom of the machine casing 6. Further, a fixing roller pair 18 and a paper discharge unit 19 are disposed near the upper side of the handle 16a of the paper feed cassette 16. The paper discharge unit 19 has a paper discharge roller pair 20, a separation claw 21, an opening / closing lever 22, and the like, and the paper discharge roller pair 20 and the separation claw 21 are supported by a rotatable support plate 40. Further, the support plate 40 can be opened / closed centering on the base portion 24a by operating the opening / closing lever 22 which is interlocked with the locking means (not shown). Further, a cleaning pad 23 of the fixing roller is brought into close contact with the upper part of the fixing roller pair 18 by a pressing means (not shown).

Since the temperature around the illumination lamp 3 becomes high, it is covered with the machine casing 6. The paper ejection tray 24 located below the paper ejection tray 1 is provided by the base 24a on the right end side thereof.
It is rotatably held immediately below the paper discharge roller pair 20 of FIG. As shown in FIG. 1, the elastically displaceable hook portions 24b provided on both sides near the center of the paper ejection tray 24 and the projections 25 provided on both side walls of the paper ejection port of the machine casing 6 are engaged. It keeps the left-up slanting posture.

The operation in the vicinity of the printing unit during printing will be described below.

One sheet of print paper P as an image forming sheet in the paper feed cassette 16 is separated by the cooperation of the paper feed roller 26 and a separating member (not shown), and the reverse conveying path 17 at the rear side.
Is fed to the reverse conveying path 17 and the slip discharge roller pair 2
It is conveyed in a U-shape forward by 7. Thereafter, the print paper P is fed to the photosensitive drum 14 by the registration roller pair 28 at a predetermined timing. A charging device 29, a developing device 30, a transfer charging device 31, and a cleaning device 32 are arranged around the photosensitive drum 14, and an enlarged toner image of the microfilm 1 formed on the photosensitive drum 14 by the well-known electrophotographic method is displayed. It is transferred to the print paper P. The paper P that has received the image transfer passes through the fixing roller pair 18 and undergoes image fixing,
It is peeled off from the fixing roller 18 by the separation claw 21 of the paper discharge section 19, and is discharged by the paper discharge roller pair 20. The discharged paper P is stacked on the paper discharge tray 24 that maintains the stackable posture, and the leading end of the print paper P is guided to the operator's hand.

Next, a method of maintaining the discharge port due to the occurrence of a jam or the like will be described. First, the discharge tray 24
Push down on the left end of the hand. Then, the hook portion 24b
Is elastically displaced and the locked state is released, and the paper ejection tray 24
As shown in FIG. 2, the paper feed cassette grip portion 16a rotates about the base portion 24a and is rotated and dropped by its own weight.
It comes into contact with and takes a retracted posture. When the opening / closing lever 22 is operated to rotate the support plate 40 counterclockwise around the base portion 24a, the roller 20 and the separation claw 2 are integrated with the support plate 40.
1 withdraws from the paper path and enters the state shown in FIG. In this state, the jammed print paper is removed or the cleaning pad 23 is replaced, and the original state is restored in the reverse order.

As described above, during maintenance of the discharge port,
By rotating the paper discharge tray 24, the operation can be easily and safely performed from the front surface of the apparatus.

FIG. 4 shows another embodiment of the present invention. Hereinafter, the same parts as those in the previous embodiment are designated by the same reference numerals. By providing an L-shaped paper stopper 33 at the left end of the paper discharge tray 24, paper can be stacked even when the paper discharge tray 24 is in the retracted posture. Furthermore, the machine casing 6
A plurality of protrusions 34 and 35 on both side walls near the paper discharge port of
By locking the hooks 24b to arbitrary projections 34 and 35, the paper discharge tray 24 can be selectively held in a plurality of stackable postures.

According to this embodiment, the optimum loading posture can be selected and the operability is improved depending on the thickness of the discharged paper, the physical properties such as waist, the ease of taking out and the ease of confirming the image. ..

5 to 11 show still another embodiment of the present invention. In this embodiment, the paper feed cassette 16 and the paper feed roller 2 are used.
6, transport path 17, registration roller 28, fixing roller pair 1
The present invention is applied to a so-called hanging reader printer in which the feeding / conveying unit 36 including 8 is opened downward for maintenance such as jam clearance.

5 to 8, the paper discharge tray 24 is rotatable around the base portion 24a, but it protrudes downward as shown in FIG. 7 on both sides of the bottom surface of the machine casing 38 that covers the illumination portion. A descent stop rail 39 having a groove inside is provided, and is engaged with elastically displaceable hook portions 37b provided at both ends near the center of the paper discharge tray 24. As shown in FIG. 9, an end portion of the feeding / conveying unit 36 on the side of the reversing conveying path 17 can be brought into contact with or separated from the main body of the apparatus, and is supported by the main body of the apparatus so as to be rotatable about a base portion 24a on the opposite side. ..

When processing jammed paper or the like in the paper feed portion and the transport path, the right end side of the feed / transport unit 36 is removed from the main body and rotated to open the transport path, as shown in FIG. When processing jammed paper in the paper output section, the paper output tray 2
The hook portion 37b of No. 4 is removed from the rail 39, the paper discharge tray 24 is rotated as shown in FIG.
Is operated to rotate the support plate 40 to open the discharge port. After the processing of the jammed paper or the like is completed, the state of FIG.

[0027]

As described above, according to the present invention, the maintenance space of the discharge port can be expanded only when needed with a simple structure and a simple operation. In addition, operability and safety can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a reader printer to which the present invention is applied.

FIG. 2 is a diagram showing a state in which a paper discharge tray is opened.

FIG. 3 is a diagram showing a state in which a paper discharge tray and a paper discharge unit are opened.

FIG. 4 is a schematic configuration diagram showing another embodiment of the present invention.

FIG. 5 is a schematic configuration diagram showing still another embodiment of the present invention.

FIG. 6 is a configuration diagram of a paper discharge unit.

7 is a cross-sectional view taken along the line VII-VII of FIG.

FIG. 8 is a perspective view of a paper discharge tray and a paper discharge unit.

FIG. 9 is a diagram showing the feeding / conveying unit in an open state.

FIG. 10 is a diagram showing the sheet discharge tray in an open state.

FIG. 11 is a diagram showing a paper ejection tray and a paper ejection unit in an open state.

FIG. 12 is a configuration diagram of a conventional reader printer.

FIG. 13 is a diagram illustrating processing of conventional jammed paper.

[Explanation of symbols]

 24 Paper Ejection Tray 24a Base 24b Hook 25 Protrusion

Claims (2)

[Claims] 1. An image forming apparatus having an image forming section and a sheet stacking section containing an image forming sheet discharged from the image forming section, and first holding means for swingably holding the sheet stacking section. ,
An image forming apparatus comprising: a second holding unit that holds the sheet stacking unit at different angles. 2. The sheet stacking section comprises a tray, one end of the tray is rotatably held by the first holding means, and the other end is held by the second holding means at a plurality of different angles. The image forming apparatus according to claim 1, wherein: