JPH075073Y2 - Jam paper removal mechanism of recording device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jammed paper ejecting mechanism for ejecting jammed paper generated in a paper feeding and conveying path in a recording device such as a printer or a copying machine.

2. Description of the Related Art In a conventional recording apparatus, for example, a sheet fed from a paper feed section is reversed in the middle and conveyed to the recording section, since the distance between the feed roller and the conveyance roller is long, the paper conveyance path between them is large. It may cause a jam.

Therefore, in the past, a door for taking out jammed paper was provided in the main body of the device, and a guide surface for the paper was formed on the inner surface of the door. I try to remove the jammed paper from the road.

However, in such a configuration, the operator must look into the paper feed / conveyance path through the opened door to confirm the position of the jammed paper, then insert his / her hand to grasp the edge of the jammed paper and pull it out. There was a problem that it was difficult to remove jammed paper.

It is an object of the present invention to provide a jammed paper take-out mechanism that facilitates taking-out of jammed paper from a paper feed / conveyance path.

In order to achieve the above object, the jam paper take-out mechanism according to the present invention sends out a paper from a paper feed unit, reverses the paper through a paper feed / conveyance path and conveys it to a recording unit, and then performs recording there. In a recording device that ejects paper, a door for taking out jammed paper is provided on the main body of the device so as to open to the outside, a guide surface for the paper is formed on the inner surface of the door, and the paper feed conveyance is performed between the guide surface and the guide surface. It is characterized in that the door is provided with a guide plate which forms a part of the path.

When the door is opened outside, the jam paper between the guide surface and the guide plate is automatically pulled out.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a schematic configuration diagram of a laser printer, which is equipped with a jam ejecting paper mechanism which is one embodiment of the present invention. In the figure, (10) is a printer main body, in the lower part of the printer main body (10) there is an automatic paper feed section (12) into which a paper feed cassette (11) can be detachably loaded, and in the upper part a manual paper feed port ( 13) are provided respectively, and the paper fed from the automatic paper feed unit (12) or the manual paper feed port (13) is conveyed to a drum-shaped photoconductor (14) as described later.

The photoconductor (14) is rotated by a photoconductor drive device, at which time the surface is charged (for example, about -800 V) by a charging charger (15), and the laser beam from the laser optical system (16) is used as follows. Exposed.

The laser beam emitted from the laser unit (17) shown in FIG. 4 is reflected by the first mirror (18) and then the polarization mirror (2) attached to the axis of the scanner motor (19).
0). As is well known, the laser unit (17) is composed of a laser diode, its drive board, a collimator lens, an aperture and the like. The oscillation wavelength of the laser diode is, for example, about 780 ± 10 mm, and the output is 3 mW
Is. The laser diode drive board receives a control signal from the engine drive board to drive the laser diode, and feeds back the emission power of the laser diode to the engine drive board to keep it constant. The collimator lens collimates the divergent light from the laser diode, which is a point light source, and the aperture shapes the beam size. The polarization mirror (20) is rotated at high speed by the scanner motor (19) and scans the emitted laser beam. With respect to the scanned laser beam, the start timing of the image forming laser beam is controlled for each scanning by the synchronization detection sensor. The scanning angle of the image forming laser beam is about 104 degrees, and the light emission is controlled for each dot during this period.

In FIG. 3, the laser beam scanned by the polarization mirror (20) is corrected by the fθ lens (21), that is, the curvature of field of the laser beam on the surface of the photoconductor (14) (main scanning direction and sub-scanning direction). And the constant velocity between one scan is corrected. The corrected laser beam is reflected by the second mirror (2
It is reflected by 2) and scans the surface of the photoconductor (14) through the cylindrical lens (23). The cylindrical lens (23) corrects the angular deviation of the laser beam due to the mounting error of the scanner motor (19) and each mirror.

When the laser beam is applied to the photoconductor (14), the negatively charged surface potential is attenuated to form an electrostatic latent image according to the image signal.

On the other hand, the toner in the developing unit (24) is agitator (2
It is sent near the developing roller (26) by 5). The toner adhered to the surface of the developing roller (26) by magnetism or static electricity is thinned to a proper thickness by the doctor blade (27) and sent to the position where it comes into contact with the photoconductor (14). Then, the toner adheres to the electrostatic latent image on the photoconductor (14), and the latent image is visualized. Here, when the developing method is the positive-positive method, the toner adheres to portions other than the exposed portion (low potential portion) of the photoconductor (14), and when the negative-positive method, the toner adheres to the exposed portion.

When the paper comes into contact with the surface of the photoreceptor (14) visualized as described above, corona discharge by the transfer charger (28) imparts a charge having a polarity opposite to that of the toner, from the back surface of the paper. The toner is transferred to the paper by the electrostatic force.

The toner image after transfer is unstable on the paper. Therefore,
The sheet is sent between the hot roller (29) and the pressure roller (30), and the toner image is fixed on the sheet by heat and pressure. The surface temperature of the hot roller (29) is the thermistor (31)
For example, the temperature is maintained at about 160 to 175 ° C., and a fuse (32) is provided for safety. Pressure roller (30)
Is pressed against the hot roller (29) by a spring (33) with a force of about 3 kg. The fixed paper is sent to the stacker (34).

Residual toner that has not been fixed and adheres to the photoconductor (14) is scraped off by the cleaning blade (35) of the cleaning unit (41) and collected in the toner recovery tank (36).

Next, the automatic paper feeding mechanism will be described. When a feed clutch (not shown) provided coaxially with the feed roller (37) is actuated by a print start signal and the feed roller (37) rotates, it is loaded in the automatic paper feed section (12). The paper in the paper feed cassette (11) is fed upward one by one through the paper feed transport path (41) while the friction pad (38) prevents the feeding of two papers. The paper sent from the paper feed path (41) is detected by a registration sensor (not shown), and is sent to the registration roller (39) provided in the upper part of the printer body (10). Stop. That is, when the paper is detected by the registration sensor, the feed clutch is turned off and the feed roller (37) is stopped.

When the registration clutch (not shown) operates under the control of the control board, the registration roller (39) rotates, and the paper is moved by the registration roller (39) and the guide roller (40) in pressure contact with the photosensitive member ( 14).

During the automatic paper feeding as described above, the manual paper feeding from the manual paper feeding port (13) is suppressed.

The structure from the automatic sheet feeder (12) to the registration roller (39) is as shown in FIG. In the figure (1
(0) is the printer body, (11) is a paper feed cassette, (37) is a feed roller, (38) is a friction pad, (39)
Is a registration roller, (40) is a guide roller, (41) is a sheet feeding / conveying path, and (42) is a sheet set in a sheet feeding cassette (11).

A door (43) for taking out jammed paper is provided on the side surface of the printer body (10). The door (43) is designed to open outward with the fulcrum shaft (44) as the fulcrum. In addition, a paper guide surface (45) is formed on the inner surface of the door (43), and
As shown in FIGS. 1 and 2, its guide surface (45)
A U-shaped guide plate (46) facing the and forming a sheet feeding / transporting path (41) therebetween is integrally formed on the door (43).

Therefore, in the above embodiment, when a jam occurs in the sheet feeding / conveying path (41), when the door (43) is sequentially opened to the A position and the B position, the guide surface (44) and the guide surface are formed. Board (46)
The jam paper (42 ') between the two is automatically pulled out of the printer body (10) through the process of the alternate long and short dash line in FIG. As a result, the jammed paper (42 ') can be easily taken out.

The paper guide surface (45) may be directly formed on the door (43), or a separate member may be formed and fixed to the door (43). Furthermore, the guide plate (46) is the door (43)
The door may be integrally formed with the door (43) or may be separately attached to the door (43).

Effects As described above, according to the present invention, the jam paper is automatically pulled out from the paper feed conveyance path by opening the jam paper take-out door to the outside. It can be taken out easily.

[Brief description of drawings]

FIG. 1 shows a laser printer having a jammed paper take-out mechanism according to an embodiment of the present invention. FIG. 1 is a configuration diagram from the automatic paper feeding section to a registration roller, and FIG. 2 is a jammed paper of FIG. FIG. 3 is a perspective view showing the inner surface of the take-out door, FIG. 3 is an overall schematic configuration view, and FIG. 4 is an enlarged view of the laser beam generator. (10) …… Printer body (41) …… Paper feed path (43) …… Jam paper ejection door (45) …… Guide surface (46) …… Guide plate

Claims (1)

[Scope of utility model registration request] 1. A recording apparatus for feeding a sheet from a sheet feeding section, reversing the sheet through a sheet feeding / conveying path, conveying the sheet to a recording section, recording there, and then ejecting the sheet, for ejecting jammed paper to the apparatus body. The door is provided so as to open to the outside, and a guide plate for the paper is formed on the inner surface of the door, and a guide plate facing the guide surface and forming a part of the paper feed transport path is provided on the door. A jam paper ejection mechanism of the recording device, which is provided.