JPH0697354B2 - Electrostatic photo printer - Google Patents

Description

Description: FIELD OF THE INVENTION This invention relates to electrostatographic printers.

2. Description of the Related Art In a conventional electrostatographic printer, a paper discharge tray for receiving printed paper is attached to a side surface of a housing.

Problems to be Solved by the Invention Since the paper ejection tray projects from the housing, the installation space becomes wider. Further, since the discharge tray is held in a cantilever state, there is a problem that the strength is weak.

In addition, there is a case in which a cassette case for feeding paper is provided on one side of the housing and a discharge tray is provided on the other side. Difficult to operate because it is on the opposite side of the paper. Furthermore, since the printing surface is on the top and the paper is ejected to the paper ejection tray, it is necessary to arrange the page order after printing.

Further, there is a problem that the manual operation part and the operation part are located on the side surface of the housing or the like and the operability is low.

The present invention has been made in view of the above points, and an object thereof is to obtain an electrostatic photography printer which can reduce the installation area and has improved operability.

Means for Solving the Problems Paper feeding formed by forming a cassette storage portion for detachably holding a cassette case in which a plurality of sheets are stored in a stacked state on the bottom surface of a housing having a printing portion including a photoconductor And a paper ejection receiver for supporting the sheets stacked in order on the upper surface of the housing, and a paper feed roller for pulling out the paper in the cassette case and the paper pulled out by the paper feed roller to the housing. An S-shaped paper path that is inverted and guided to the printing unit and then reversed and guided to the paper discharge receiver and a paper feeding unit located in the paper passage are provided, and the printing unit is operated in front of the housing. An operation section, an entrance / exit for mounting the cassette case, and a manual insertion section for inserting sheets one by one are provided.

In addition, an opening / closing body that opens the paper passage is provided on the front surface and the back surface of the housing.

Action Since the paper ejection tray is provided on the top surface of the housing, it prevents the paper ejection tray from protruding from the housing as in the past, and has a cassette case on the bottom surface of the housing. By providing the housing, the installation area of the housing can be reduced, and the front surface of the housing can be arranged by arranging the manual insertion portion, the operation portion, and the doorway for loading and unloading the cassette case. It is possible to perform a series of operations with, and improve the operability. Furthermore, by providing the opening and closing body on the front and back of the housing, the opening and closing body can be opened to easily handle the paper jam. It is possible.

Embodiment An embodiment of the present invention will be described with reference to the drawings. Case 1
The main frame 2 and the opening / closing frame 3 are rotatably connected by a shaft 4. A drum frame 5 is held on the open / close frame 3 by a shaft 6 so as to be vertically rotatable 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. A printing unit 16 is formed by these components held by the drum frame 5, the beam light emitting unit 14 and the fixing unit 15 held by the frame 3.

Further, on the bottom surface of the housing 1, there is provided a paper feed section 20 formed of a cassette storage section 19 for holding a cassette case 18 for accommodating sheets 17 in a stacked state. An entrance 21 for inserting and removing the cassette case 18 is formed on the front surface of the housing 1, a handle 22 is formed at the end of the cassette case 18, and the position of the cassette case 18 is determined at the back of the cassette housing portion 19. A stopper 23 is formed.

Further, a paper discharge tray 24 is formed on the upper surface of the open / close frame 3 and is inclined upward as it goes forward. An opening / closing body 25 is biased in the counterclockwise direction on the front side of the main frame 2 and is rotatably held by a shaft 26, and an operating section 27 for operating the printing section 16 and the like is provided on the front side of the opening / closing frame 3. There is.
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 faces the guide plate 30 of the main frame 2 and a guide plate 32 that forms a manual portion 31, a sensor 33 that detects the passage of the paper, and a guide plate 34 of the main frame 2. A guide plate 35 and is 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 rear opening / closing body 28. And these guide plates 34-39
As a result, a substantially S-shaped sheet passage 40 is formed in which the sheet 17 of the cassette case 18 is inverted and passed through the lower portion of the photoconductor 8 to be further inverted and guided to the sheet discharge tray 24.

Along the paper path 40, a paper feed roller 41 and paper feed units 42, 43,
44 are arranged, and these paper feed roller 41 and paper feed units 42, 4 are arranged.
The motor 26 for driving the rollers on the driving side of 3, 44, the photoconductor 8 and the width-adjusting rollers 45 provided in the hand gap 31 is the main frame 2
It is provided in. The main frame 3 is also provided with a motor 47 for driving a magnet roller (not shown) of the fixing unit 15 and the developing unit 10. A roller 48 on the driven side of the paper feeding unit 43 is held by the opening / closing body 28, and a roller 49 facing the width-adjusting 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 photoconductor 8 once, a charging layer is first formed on the outer periphery of the photoconductor 8 by the charging unit 9, and a beam beam is emitted from the beam beam emitting unit 14 to form an electrostatic latent image on the layer. This electrostatic latent image is developed 10
The image is developed by, and this image is transferred by the transfer unit 11 to the paper 17 pulled out from the cassette case 18 by the paper feed roller 41, and then the paper 17 is fixed by the fixing unit. At this time, the paper 17 passes through the lower portion of the photoconductor 8 so that the printing surface is on the upper side, but is reversed in the latter half of the paper passage 40 so that the printing surface is directed downward and is sequentially stacked on the paper discharge tray 24. Therefore, since the pages are usually printed starting from the youngest page, the young page can be turned up with the printing surface facing up only by reversing the sheets 17 of the sheet discharge tray 24 in the stacked state.

When printing other sheets one by one, insert them from the manual feed section 31. On the front surface of the housing 1, an operation part 27, a hand part 31 and an entrance 21
Since the and are arranged, a series of operations such as operation of the printing unit 16, insertion of paper from the manual insertion unit 31, and insertion / removal of the cassette case 18 can be performed from the front of the housing 1.

When the paper is jammed in the paper passage 40 or the manual feed portion 31, the opening / closing bodies 25 and 28 are rotated outward as shown in FIG. This makes it possible to take out the jammed paper very easily.

Further, as shown in FIG. 3, the opening / closing frame 3 can be rotated upward, and the drum frame 5 can also be rotated upward with 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.

Furthermore, since the cassette case 18 and the paper discharge receiver 24 do not project outside the housing 1, the installation space of the housing 1 can be reduced and the strength of the paper discharge receiver 24 can be increased.

Although the paper discharge tray 24 is formed integrally with the open / close frame 3, it may be formed as a separate piece and attached to the upper surface of the housing.

EFFECTS OF THE INVENTION As described above, according to the present invention, the cassette housing portion that detachably holds the cassette case that houses a plurality of sheets in a stacked state is formed on the bottom surface of the housing having the printing portion including the photoconductor. A sheet feeding section, a sheet receiving tray for supporting the sheets stacked in sequence on the upper surface of the casing, and a sheet feeding roller for pulling out the sheet of the cassette case into the casing and the sheet feeding roller for pulling out the sheet. Since an S-shaped paper path that guides the paper to the printing unit by reversing the paper and reversing the paper to the paper receiving tray and a paper feeding unit located in the paper passage are provided, the paper is discharged on the upper surface of the housing. Since the tray is provided, the ejection tray is prevented from protruding from the housing as in the conventional case, and the bottom of the housing is provided with a paper feeding unit having a cassette case, thereby making You can reduce the installation area In addition, since the operation unit for operating the printing unit, the entrance for loading the cassette case, and the manual insertion unit for inserting the sheets one by one are provided on the front surface of the housing, the manual operation is performed on the front surface of the housing. By arranging the operation unit, the operation unit, and the doorway for loading and unloading the cassette case, a series of operations can be performed on the front surface of the housing to improve operability, and further, the front surface of the housing Since the opening / closing body for opening the paper passage is provided on the rear surface and the back surface, the opening / closing body can be opened to easily perform the paper jam processing.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a vertical cross-sectional side view, FIG. 2 is a vertical cross-sectional side view showing a state in which a paper path is opened, and FIG. 3 is a vertical cross-sectional view in which an opening / closing frame is open. It is a side view. 1 ... Housing, 8 ... Photoconductor, 16 ... Printing section, 17 ... Paper, 18 ... Cassette case, 19 ... Cassette storage section, 20
…… Paper feed unit, 21 …… Entry / Exit, 24 …… Paper ejection receiver, 25 …… Opening / closing body, 27 …… Operating unit, 28 …… Opening / closing body, 31 …… Hand rest part, 40
…… Paper path, 41 …… Paper feed rollers, 42 to 44 …… Paper feed section

Claims (2)

[Claims] 1. A paper feeding unit is provided on a bottom surface of a housing having a printing unit including a photoconductor, and a cassette housing unit detachably holding a cassette case accommodating a plurality of sheets in a stacked state. A paper receiving tray is provided on the upper surface of the housing to sequentially support the paper, and a paper feeding roller for drawing out the paper in the cassette case and the paper drawn by the paper feeding roller are reversed in the housing. An S-shaped paper path that leads to the printing section, is turned over again, and leads to the discharged sheet receiving section, and a paper feeding section located in the paper path are provided, and an operating section that operates the printing section is provided on the front surface of the housing. An electrostatic photo printer, comprising: an entrance / exit for mounting the cassette case; and a manual insertion section for inserting the sheets one by one. 2. A paper feeding section provided with a cassette housing section detachably holding a cassette case for accommodating a plurality of sheets in a stacked state on the bottom surface of a housing having a printing section including a photoconductor. A paper receiving tray is provided on the upper surface of the housing to sequentially support the paper, and a paper feeding roller for drawing out the paper in the cassette case and the paper drawn by the paper feeding roller are reversed in the housing. An S-shaped paper path leading to the printing section and re-inverted to the paper receiving tray and a paper feeding section located in the paper path are provided, and the paper path is opened to the front and back of the housing. An electrostatic photo printer, which is provided with an opening / closing body.