JP2913598B2 - Electrostatographic printer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatographic printer. 2. Description of the Related Art In a conventional electrostatographic printer, a discharge tray for receiving printed paper is attached to a side surface of a housing. [0003] Since the paper ejection tray protrudes from the housing, the installation space becomes large. Further, since the paper discharge tray is held in a cantilever state, there is a problem that the strength is weak. Further, there is a case in which a cassette case for feeding paper is provided on one side of a housing and a discharge tray is provided on the other side. The operation is difficult because the paper and the paper ejection are performed on opposite sides.
Further, since the paper is discharged to the paper discharge tray with the printing surface facing upward, it is necessary to arrange the page order after printing. On the other hand, when a paper jam occurs in the housing, there is a problem that it is difficult to perform the processing. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an electrostatographic printer capable of reducing an installation area, improving operability, and easily performing paper jam processing. With the goal. Means for Solving the Problems A beam light emitting section is held.
To be rotatably connected to the fulcrum the back side of the opening and closing frame and the main frame forming a housing having a printing unit including a photosensitive member and the sheet of plural sheets on a bottom surface of the main frame of the housing A paper receiving unit is provided which forms a cassette storage section for detachably holding a cassette case in which the cassette cases are stored in a stacked state, and a discharge tray for supporting the sheets by sequentially stacking the sheets on the upper surface of the openable frame of the housing. And a paper feed roller for pulling out the paper from the cassette case in the housing, and inverting the paper drawn out by the paper feed roller, guiding the paper to the printing unit, inverting the paper again, and guiding the paper to the discharge tray S
A paper path and a paper feed section located in the paper path, and an operation section for operating the printing section, a door for mounting the cassette case, and a hand for inserting sheets one by one in front of the housing. And a difference part. In addition, the drum frame
The drum frame has at least a photoconductor.
A developing unit was attached. An embodiment of the present invention will be described with reference to the drawings. The housing 1 has a main frame 2 and an opening / closing frame 3 rotatably connected by a shaft 4. A drum frame 5 is held on the opening / closing frame 3 by a shaft 6 so as to be freely rotatable up and down, and is urged upward by a spring 7. The drum frame 5 holds a photoconductor 8, a charging unit 9, a developing unit 10, a transfer unit 11, a latent image erasing unit 12, and a cleaning unit 13. These parts held on the drum frame 5 and the beam light emitting unit 14 held on the frame 3
The fixing unit 15 forms a printing unit 16. On the bottom surface of the housing 1, there is provided a paper feed section 20 formed with a cassette storage section 19 for holding a cassette case 18 for storing the sheets 17 in a stacked state.
An entrance 21 for inserting and removing the cassette case 18 is formed at the front of the housing 1, a handle 22 is formed at an end of the cassette case 18, and the position of the cassette case 18 is determined at the back of the cassette storage portion 19. A stopper 23 is formed. Further, on the upper surface of the opening / closing frame 3, there is formed a paper receiving tray 24 which is inclined upward as it goes forward. An opening / closing body 25 is urged in a counterclockwise direction and is rotatably held by a shaft 26 on the front of the main frame 2, and an operation unit 27 for operating the printing unit 16 and the like is provided on the front of the opening / closing frame 3. I have. An opening / closing body 28 is urged clockwise on the back surface of the main frame 2 and is rotatably held by a shaft 29. Further, the front opening / closing body 25 has a guide plate 32 facing the guide plate 30 of the main frame 2 so as to form a hand portion 31 and a sensor 33 for detecting the passage of a sheet.
Guide plate 3 facing guide plate 34 of main frame 2
5 are provided. Further, guide plates 36 and 37 are provided on the main frame 2. Further, a guide plate 39 facing the guide plate 38 of the opening / closing frame 3 is provided on the opening / closing body 28 on the rear surface. And these guide plates 34
A substantially S-shaped paper path 40 is formed by turning the sheet 17 of the cassette case 18 through the lower part of the photoreceptor 8 and further turning the sheet 17 to the sheet discharge receiver 24 by means of .about.39. Along a paper path 40, a paper feed roller 41
The paper feed rollers 41, the rollers on the drive side of the paper feed units 42, 43, 44, the photoconductor 8, and the width adjusting rollers 45 provided on the hand feed unit 31 are arranged.
A motor 46 for driving the like is provided on the main frame 2. Further, a motor 47 for driving a magnet roller (not shown) of the fixing unit 15 and the developing unit 10 is also provided on the main frame 3. The roller 48 on the driven side of the paper feeding unit 43 is held by the opening / closing body 28, and the roller 49 facing the width shifting roller 45 is held by the opening / closing body 25. In such a configuration, the cassette case 18 is mounted from the entrance 21 on the front surface of the housing 1. In the process of rotating the photoreceptor 8 once, a charging layer is first formed on the outer periphery of the photoreceptor 8 by the charging unit 9, and a beam is emitted from the beam light emitting unit 14 to this layer to form an electrostatic latent image. The electrostatic latent image is developed by the developing unit 10, and the image is transferred by the transfer unit 11 to the sheet 17 pulled out of the cassette case 18 by the feed roller 41, and then the sheet 17 is fixed by the fixing unit. At this time, the paper 17 passes through the lower part of the photoreceptor 8 so that the printing surface is upward, but is inverted in the latter half of the paper path 40, and the printing surface is directed downward, and is sequentially stacked on the paper discharge receiver 24. Therefore, since printing is normally performed from a young page, the printing surface can be turned upward and the young page can be turned up only by reversing the paper 17 of the paper discharge receiver 24 in a stacked state. When printing other sheets one by one, the sheet is inserted from the manual feed unit 31. Since the operation unit 27, the manual feed unit 31, and the entrance 21 are arranged on the front of the housing 1, a series of operations such as operation of the printing unit 16, insertion of paper from the manual feed unit 31, insertion and removal of the cassette case 18, and the like. Can be performed from the front of the housing 1. When a sheet is jammed in the sheet passage 40 or the manual feeding portion 31, the opening / closing members 25 and 28 are turned outward as shown in FIG. This makes it possible to remove the jammed sheet very easily. Further, as shown in FIG. 3, the opening / closing frame 3 can be pivoted upward to open the operation section largely.
The drum frame 5 can also rotate upward about the shaft 6 as a fulcrum. Therefore, the inside of the housing 1 is widely opened, and the internal inspection and the like can be easily performed. Further, the cassette case 18 and the paper discharge tray 2
Since the case 4 does not protrude outside the case 1, the installation space of the case 1 can be reduced, and the strength of the sheet discharge tray 24 can be increased. Although the paper discharge tray 24 is formed integrally with the opening / closing frame 3, it may be formed as a separate piece and attached to the upper surface of the housing. According to the present invention, as described above, beam light emission
A housing having a printing unit including a photoconductor is formed by rotatably connecting a back side of the opening / closing frame holding the unit and the back side of the main frame by a fulcrum, and a plurality of housings are provided on a bottom surface of the main frame of the housing. A paper supply unit is provided that forms a cassette storage unit that detachably holds a cassette case in which sheets of paper are stored in a stacked state, and the papers are sequentially stacked and supported on the upper surface of the opening / closing frame of the housing. A paper receiving tray is provided, and a paper feed roller for pulling out the paper from the cassette case in the housing and the paper drawn out by the paper feeding roller are inverted, guided to the printing unit, and again inverted and guided to the paper discharged receiver. An S-shaped paper path and a paper feed section located in the paper path are provided, and an operation section for operating the printing section, an entrance for mounting the cassette case, and sheets are inserted one by one in front of the housing. The paper tray is provided on the upper surface of the housing to prevent the paper output tray from protruding from the housing as in the conventional case, and the cassette is provided on the bottom surface of the housing. By providing a paper feed unit with a case, the installation area of the housing can be reduced,
By arranging the manual access portion, the operation portion, and the entrance for taking in and out the cassette case on the front of the housing, a series of operations can be performed on the front of the housing, and the operability can be improved, Furthermore, since the housing is provided with the opening / closing frame rotatably provided on the main frame, the opening / closing frame can be turned upward to open the operation section largely, thereby opening the opening / closing frame to reduce paper jams. This has the effect that processing and internal inspection can be easily performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention. FIG. 2 is a longitudinal sectional side view showing a state in which a paper passage is opened. FIG. 3 is a longitudinal sectional side view showing a state where an opening / closing frame is opened. [Description of Signs] 1 Housing 2 Main frame 3 Opening / closing frame 4 Axis 8 Photoconductor 15 Beam light emitting unit 16 Printing unit 17 Paper 18 Cassette case 19 Cassette storage unit 20 Feed unit 21 Exit 24 Exit tray 27 Operation unit 31 Manual feed unit 40 Paper path 41 Paper feed roller 42 Paper feed unit 43 Paper feed unit 44 Paper feed unit

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁶ identification code FI B41J 29/00 T (58) Field surveyed (Int.Cl. ⁶ , DB name) B41J 29/00 B41J 2/44 B41J 13 / 00 G03G 15/00 510 G03G 15/00 550

Claims (1)

(57) [Claims] Closing frame and main holding the light beam emitting unit
A rear side of the in-frame is pivotally connected to a fulcrum to form a housing having a printing portion including a photoconductor, and a plurality of sheets are stored in a stacked state on the bottom surface of the main frame of the housing. A paper feed unit that forms a cassette storage unit that detachably holds a cassette case that can be detachably provided, and a discharge tray that supports and stacks the sheets sequentially on an upper surface of the opening / closing frame of the housing; A paper feed roller for pulling out the paper from the cassette case, an S-shaped paper path for inverting the paper drawn by the paper feed roller, guiding the paper to the printing unit, inverting the paper again, and guiding the paper to the paper receiving tray; A paper feeding unit located in a passage, and an operation unit for operating the printing unit, an entrance for mounting the cassette case, and a manual insertion unit for inserting sheets one by one are provided on the front of the housing. Feature Electrostatographic printer. 2. A drum frame is provided in the housing, and the drum frame
At least a photoconductor and a developing unit are attached to the
An electrostatographic pudding according to claim 1, wherein
Ta.