JPH0223369A - Recorder - Google Patents

Abstract

PURPOSE:To start an image producing process as long as feeding is normal by providing a sensor detecting that recording material is fed from the feeding part of a paper feed part, and starting the recording action of a main body based on a detecting signal from the sensor. CONSTITUTION:The feed sensor 27 is provided on the feeding part of the feed roller 20, and detects whether a transfer material 22 is surely fed or not. Based on the detected signal, the image producing process is started to transfer an image. As a result, even if the feed of the recording material from the paper feed part B develops defect, the image producing process starts when the feed is normal, whereby signal of jamming is not required. In addition, the image producing process does not precede, thereby preventing the wasteful use of toner.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording apparatus that prevents troubles caused by errors in feeding recording materials.

[Background of the invention]

As part of the image creation process in a recording device, such as an electrostatic copying device, there is feeding of the recording material (transfer paper) and registration (timing to align the leading edge of the recorded image with the leading edge of the recording material). at the timing required by the built-in computer,
Feeding of the recording material, etc. is executed. If the recording material is not fed out normally during registration with the created image, recording may not be possible on the recording material, resulting in a paper feeding error, or the recording material may be fed out again during the next image creation cycle. It is designed to run.

[Problem to be solved by the invention]

That is, since the image forming timing is the main factor, if a recording material feeding failure occurs and it is determined that registration is impossible, it is treated as a paper feed jam (paper jam). Therefore, the user is required to remove the jam,
This requires extra time and is extremely troublesome.

Further, in a method in which paper is fed again after waiting until the next image forming cycle, it is necessary to wait until then, and there is a problem that copying efficiency decreases.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned problems caused by poor feeding by starting the imaging process only when feeding is normal.

[Means to solve the problem]

To this end, the present invention provides a recording apparatus that records information in a main body on recording materials that are fed one by one from a paper feeding section, and a sensor that detects that the recording material is sent out from a feeding section of the paper feeding section. A recording operation of the main body is started based on a detection signal from the sensor.

〔Example〕

Examples of the present invention will be described below. FIG. 1 is a diagram showing the entire recording apparatus. A is the main body of the recording apparatus, and B is a paper feed section.

In the main body portion A, when the photoreceptor drum 2 charged at a high voltage by the charging electrode 1 is exposed to the image light 3, a latent image is formed on the photoreceptor drum 2. This latent image is developed into a toner image in a developing section 4, and transferred to a recording material (transfer paper) fed from a registration roller 6 in a transfer scraper 5. The recording material is separated from the photosensitive drum 2 by the separation pole 7, enters the heat fixing roller 9 from the conveying section 8, where the toner image is fixed, and is discharged onto the paper discharge tray 10. Toner remaining on the photosensitive drum 2 is cleaned by a cleaning section 11.

The paper feed section B feeds the recording materials 22 stacked in the cassette 21 by the rotation of the feed roller 20 and the double feed prevention belt 2.
3 and roller 24, the topmost sheet is separated and sent out to the guide 25, and when the tip touches the registration roller 6 and a suitable loop is created, the sending out roller 20 stops and the feeding continues. Interrupted.

In order to properly loop the recording material 22, a temporary stop sensor (optical sensor) 26 is provided near the registration roller 6 to detect the leading edge of the recording material 22. The rotation is stopped when a certain period of time t has elapsed since the sensor 26 detected the tip.

After this, the registration roller 6 is rotationally driven by a registration signal (pulse) from the image forming section, and the recording material that had hit the roller is fed in the direction of the photosensitive drum 2, and the image is transferred in the process described above. (See Figure 2 for the above timing).

As described above, before the registration roller 6 is driven by the registration signal, the recording material 22 is
The tip must reach .

However, if the recording material does not reach the registration roller 6 due to a feeding failure, etc., image formation, transfer, etc. will be impossible.
As mentioned above, it is treated as jam. Furthermore, in the image forming process, toner is cleaned without being transferred, resulting in wasted toner and increased damage.

Therefore, in this embodiment, a feed-out sensor 27 is provided at the portion where the transfer material 22 is fed out from the feed-out roller 20.
The sensor 27 detects whether or not the image has been reliably sent out, and the image forming process for image transfer is started based on this detection signal.

The timing in this case is shown in FIG. 3. When a feed-out failure occurs by the feed-out roller 20, compared to the case where the feed-out occurs normally (indicated by the dotted line in FIG. 3), the time T delayed due to the feed-out failure occurs. Feeding detection sensor 27, -
The recording material detection timing of the time stop sensor 26 is delayed.

On the other hand, the registration signal is a signal from the image forming process, and therefore, for example, if the start of feeding is taken as the start of the image forming process, it is output at a predetermined timing regardless of the feeding of the recording material.

Therefore, by determining the start of the image forming process based on the signal from the feed-out detection sensor 27, even if a feed-out failure occurs, the image forming process will be started at the time when the feed-out becomes normal and the recording material is fed out. Since the imaging process is performed, the effects of the defect are automatically removed. FIG. 4 shows a program that performs the above control.

Incidentally, in the above case, the image forming process does not start until the feeding becomes normal, so if the defective state continues for a long time, the user has to wait during that time. Therefore, if the maximum permissible time from when the feed roller 20 is driven until the feed sensor 27 detects the recording material is determined in advance, and then the abnormality can be notified.

Moreover, it goes without saying that the - time stop sensor 26 can also be used as the above-described feed sensor 27.

〔Effect of the invention〕

As described above, according to the present invention, even if a failure occurs in the feeding of the recording material from the paper feed section, the image forming process starts from the time when the feeding is normal, so there is no need to issue a jam notification. Furthermore, since the image forming process does not precede the image forming process, toner consumption can also be prevented.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a schematic configuration of a recording apparatus according to an embodiment of the present invention, FIG. 2 is a timing chart of a conventional process, FIG. 3 is a timing chart of a process of this embodiment, and FIG.
The figure is a flowchart of a program for obtaining timing in this embodiment. 20... Feeding roller, 21... Cassette, 22
...Recording material, 23...Double feed prevention belt, 24...
Roller, 25... Guide, 26... Time stop sensor, 27... Feeding sensor.

Claims (1)

[Claims] (1) In a recording device that records information in a main body on recording materials fed one by one from a paper feeding section, a sensor is provided to detect that the recording material is sent out from a feeding section of the paper feeding section, A recording device characterized in that a recording operation of the main body is started based on a detection signal from the sensor.