JPS6064366A - Image recorder - Google Patents

Abstract

PURPOSE:To facilitate maintenance by fitting an automatic and manual paper feed and conveyance mechanism to a lower frame body and a transfer electrode and a separation electrode to an upper frame body into a composite unit, and supporting end parts of the upper and lower frame bodies pivotally in an opening/closing state. CONSTITUTION:The upper frame body 39 and lower frame body 40 are supported on a shaft 41 pivotally in the opening/closing state. (figure shows an opening state.) Recording forms P are conveyed, sheet by sheet, from the paper feed cassette 21 of the lower frame body 40 automatically by rollers 22, 23, 25 and 34 and a form which is fed manually is inserted from a table 27 and passed through a roller 29 and then conveyed in the same conveyance path as the conveyance path of the automatically fed forms behind the roller 25. The forms are exposed to a photosensitive drum 31 in the middle of the conveyance and toner is transferred 32; and they are separated 33 from the photosensitive drum 31 and then discharged into a paper discharge tray 37 after fixation 35. Consequently, if jamming occurs, the upper frame body 39 is opened around the shaft 41 as shown in the figure and the frame body 38 is further rotated as shown by an arrow A to facilitate repair and inspection.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image recording apparatus such as an electrostatic copying machine, and more particularly to an image recording apparatus having an improved paper feeding means.

[Prior art]

In an image recording device such as an electrostatic copying machine, an electrostatic image is formed on an electrostatic image carrier such as a photosensitive drum, and a developing device attaches toner to the electrostatic image to make it visible. The toner image is transferred and fixed onto recording paper to obtain the desired recorded matter.

FIG. 1 is a diagram showing the general structure of a copying machine as described above, in which recording paper P is stacked on a cassette (1) and loaded into the copying machine, and is automatically separated one by one by a paper feed roller 2. It is fed out, guided by guide plates 3 and 4, and fed to a top-rolling thick portion with timing regulation by registration rollers 5. The fed recording paper comes into contact with the surface of the photosensitive drum 60 carrying the toner image, is attracted to the surface by the electric charge of the photosensitive drum 6, and the toner image carried on the photosensitive drum 6 is removed by discharge from the transfer electrode 7. transcribed. The recording paper on which the toner image has been transferred is separated from the surface of the photosensitive drum 60 by alternating current corona discharge from the separation electrode 8, passes through the fixing roller 9, becomes a completed recording, and is discharged from the machine by the paper discharge roller 10. Ru.

-〇- In the case of a copying machine like the one shown in Figure 1, the passage path of recording paper is simple and there are few bends, so there are relatively few troubles associated with paper conveyance. In some cases, a so-called jamming failure occurs in which paper jams, and it becomes necessary to remove it. In order to facilitate maintenance in such cases, for example,
As disclosed in No. 27, the copying machine is moved almost along the path of the recording paper, for example, two points above and below the line X-X in FIG.
One end of the lower machine frame is rotatably attached to the lower machine frame via a shaft 13, and one end of the lower machine frame is rotatably attached to the lower machine frame. . As a result, if a problem occurs in conveying the recording paper, you can rotate the upper machine frame in the direction of the arrow to open the paper conveyance section (up and down) to remove jammed paper or adjust the defective part. etc. can be done extremely easily.

However, in recent years, with the diversification of applications for copying machines and their miniaturization and weight reduction, in addition to the automatic paper feeding system described above, there are also manual paper feeding systems that manually feed specially designed paper, or paper feeding systems. Copying machines with complicated recording paper conveyance paths, such as those in which paper is U-turned inside the copying machine and paper is fed and ejected from the same side of the copying machine, are being used. Maintenance of the recording paper transport system is often difficult based on the mold structure alone (improvements are desired).

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a copying machine that is easy to maintain and has an automatic paper feed conveyance means and a manual paper feed conveyance means.

[Structure of the invention]

The above purpose is to store the loaded recording sheets in a stack.
It has an automatic paper feed conveyance means that feeds sheets one by one, and a manual paper feed conveyance means that feeds manually fed recording paper, and the main body is divided into an upper machine frame and a lower machine frame, and the upper machine frame is In the image recording device, one end of which is rotatably mounted on a shaft member at one end of the lower machine frame, the automatic paper feeding and conveying means;
Image recording characterized in that the transfer electrode and the separation electrode, which are the manual paper feed conveyance means, are attached to a frame to form a single paper feed unit, and one end of the frame is rotatably pivoted to the shaft. achieved by the device.

The above-mentioned automatic paper feed conveyance means includes a half-moon roller that intermittently feeds out the accumulated recording paper, a paper feed roller such as an intermittent drive four roller, a guide plate that regulates the traveling direction of the fed paper, and a paper position. , there is a Luji roller that regulates the conveyance timing, and other auxiliary conveyance rollers can be added. In addition, the manual paper feed conveyance means includes a conveyance roller that receives the recording paper, a guide plate, a register roller, and other auxiliary conveyance rollers, some of which are also used as the automatic paper feed conveyance means described above. You can also do that.

Hereinafter, the present invention will be specifically explained with reference to Examples.

〔Example〕

It is accumulated and loaded in the tray 21, and rotated by the half-moon roller n.
- Therefore, one sheet at a time is sent out intermittently. The sent paper is conveyed by conveyance rollers n and a guide plate a, and after its position and timing are adjusted by registration rollers 5, it is fed to the transfer section along the guide plate station.

In addition, in the case of manual feed, the recording paper is inserted from the manual feed table n along the guide plate row, is conveyed by the manual feed conveyance roller 4, and the guide plate row, reaches the registration roller 5, and then continues on the same path as in the case of automatic paper feed. Yes.

The registration roller δ is used for both the automatic paper feeding system and the manual paper feeding system. A photosensitive drum 31 carrying a toner image on its surface
The toner is transferred to the paper by the action of the transfer electrode 320, separated from the photosensitive drum surface by the separation electrode 33, sent to the fixing section by the transport roller, fixed by the fixing roller, and then transferred to the paper discharge roller. The paper is discharged onto the paper discharge tray 37.

In this apparatus, as shown in the figure, a half-moon roller ρ, which is an automatic sheet feeding and conveying means, a conveying roller, a guide plate, a registration roller 6, a guide plate, which is a manual sheet feeding means, 30. Conveyance roller 4 is located between the frames A and M (the same type as between the frames, and is located on the back side of the diagram.
(not shown in the figure) 6- (assembled into an integrated paper feed unit).

This copying machine is divided into an upper machine frame 39 and a lower machine frame 40.
As shown in the figure, it is constructed so that it can be opened up and down, and both horizontal frames are rotatably connected by a shaft 41. 1] are pivotally connected to each other so as to be rotatable. The chain line in Fig. 2 indicates the dividing line between the upper and lower machine frames. Fig. 3 shows the upper machine frame of the copying machine in an open state. The paper feed unit.

If paper stickiness occurs in the manual feed path on the upper side of the paper feed unit, it can be easily dealt with by putting it in this state. The next thing that happened was the paper feed unit.

By rotating the paper feed unit 1 to position A, disassemble the device as in the case above. Copying can be resumed immediately by closing the top and the upper machine frame of the main body.

In FIGS. 2 and 3, 42 is a document table, 43 is a developing device, and 44 is a cleaning device.

As is clear from the above embodiments, according to the present invention it is possible to produce an image recording device having a paper feeding system that is extremely easy to maintain; however, its aspects are not limited to the above embodiments. It is possible to take various embodiments within the scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an electrostatic copying machine, FIG. 2 is a schematic diagram of a copying machine according to the present invention, and FIG. 3 is an explanatory diagram showing the copying machine according to the present invention in an open state. 21...Paper feed cassette n...Half-moon roller blade, 29
...Conveyance roller 6°°・Registration roller lath, 26,
28. 30...Between guide boards...Frame body 39...Upper machine frame...Lower machine frame 41...Shaft body agent Yoshimi Kuwabara

Claims (1)

[Claims] (1) #1. 1 recording paper loaded in a stacked state
In an image recording apparatus in which an automatic sheet feeding conveyance means feeds sheets one by one, and an end of an upper machine frame for manual feeding is rotatably attached to an end of a lower machine frame by fitting on a shaft body, the automatic sheet feeding conveyance means and , an image characterized in that the manual feed conveyance means is attached to a frame together with a transfer electrode and a separation electrode to form a single paper feed unit, and one end of the frame is rotatably pivoted to the shaft. Recording device.