JPH0223372A - Copying device - Google Patents

Abstract

PURPOSE:To automate the selection of a synchronous exposure system by setting an original to an original feed part, setting a manually inserting part, or setting paper to said manually inserting part. CONSTITUTION:While a manually inserting tray 32 is erected, a sensor 34 detects the tray 32, and when an original is placed on the original tray 21 of an original feeder B, a sensor 26 detects the tray 21. When both sensors 26 and 34 are turned on, a control system automatically selects a mode of an optical scanning and exposing system (normal exposure). On the other hand, when the manually inserting tray 32 falls toward the direction of an arrow, the sensor 34 does not detect the tray 32, however the sensor 26 detects that when an original is placed on the original tray 21 of the original feeder B. In such a way, when the sensor 34 is turned off and the sensor 26 is turned on, the control system selects a mode of the synchronous exposure system. Under specific conditions, the synchronous exposure system is automatically selected to simplify operation.

Description

[Detailed Description of the Invention] [Background of the Invention] The present invention provides an optical scanning exposure method in which the original is read by stopping the original and moving an optical system, and a synchronous exposure method in which the original is read by stopping the optical system and moving the original. The present invention relates to a copying apparatus that is capable of both of the following, and particularly relates to a copying apparatus that automates the selection of a synchronous exposure method.

[Background of the invention]

Conventionally, there has been a method for selecting a synchronous exposure method by operating an operation button on an operation unit. and,
When this synchronous exposure method is selected, a dedicated display or a message display is used to indicate the selection.

To explain the synchronous exposure method in a little more detail, the optical system is stationary at a specific position, the document is scanned by running at a constant speed by the document feeder, and the optical image (primary image) obtained there is sent to the photoreceptor drum. This is a method to create an image. This synchronous exposure method makes it possible to pass long originals compared to the optical scanning exposure method, which is limited in size.For example, in a copying machine that can copy an A3 size original by placing it vertically,
This method enables horizontal feeding of A2 size paper.

In addition, it is possible to pass not only standard size documents but also long documents such as roll paper. Note that the term "horizontal feeding" as used herein refers to feeding the paper along the longitudinal direction of the paper along the paper conveyance direction.

[Problem to be solved by the invention]

However, as described above, the selection of this synchronous exposure method requires a command from the operation unit each time, and the setting is complicated.

An object of the present invention is to solve the above-mentioned problems by automating the selection of a synchronous exposure method.

[Means to solve the problem]

To this end, the present invention provides a copying apparatus that is equipped with a document feed section and a transfer sheet manual feed section, and in which the 3Tlln optical system can be selected, in which a document is set in the document feed section and a joint feed section is set. The above-mentioned synchronous exposure method is configured to be selected by setting the paper in the joint insertion section.

〔Example〕

Examples of the present invention will be described below. FIG. 1 is a diagram showing a schematic configuration of a copying apparatus according to one embodiment. This copying apparatus is composed of a main body section A, an original feed section (ADF) B, and a paper feed section C.

First, in the main body A, the original is exposed and scanned by relative movement between the original on the upper surface of the platen glass 1 and the light source 2, and the resulting optical image of the original is transmitted via the mirrors 3 to 6 and the lens system 7. Then, a high voltage is applied to the photosensitive drum 9, which has been charged in advance by the charging electrode 8, and an electrostatic latent image is formed thereon. This latent image is developed by a developing device 10 and converted into a toner image, and this toner image is transferred to a transfer paper fed from a registration roller 11 at a transfer pole 12, and the transfer paper is further transferred to a separation pole. It is separated from the photoreceptor drum 9 at 13, and transferred to the heat fixing roller 1 by a conveyor belt 14.
5, where it is fixed and the paper is ejected. The toner remaining on the photoreceptor drum 9 is cleaned by the cleaning section 16, and charged again by the charging electrode 8 in preparation for the next latent image formation.

The entire document feeding section B is set on the upper surface of the platen glass l. Then, the original placed on the original plate 21 is guided from the roller group 22 to the feed belt 23, where the original is brought onto the platen glass 1 and stopped at a specific position, or the original is moved over the platen glass 1 at a constant speed. Let it run with
Subject to exposure.

The exposed document is sent from the guide 24 to the document discharge tray 25. Note that when a document is set on the document plate 21, the sensor 26 detects the setting.

The paper feed section C is a main paper feed section (LC) in which multiple sheets of the same type of original are stacked.
cassette 31 as T) and the arrow a from the side indicated by the dashed line.
It is equipped with a manual feed tray 32 as a manual feed section that is set by tilting it in the direction shown by , and the tip (lower end) 32a of this manual feed tray 32 presses the paper on the top surface of the cassette 31 when it is set by tilting it in the direction of arrow a. It enters the lower surface of the feed roller 33. This manual tray 32 is in its upright state (
The sensor 34 detects whether it is a set state (indicated by a virtual line in the figure) or a set state (indicated by a solid line in the figure). 35 is a double feeding prevention belt, 36 is a roller, and 37 is a guide.

Now, when the manual tray 32 is in the upright state, the sensor 34
detects the manual feed tray 32, and when a document is placed on the document tray 21 of the document feeder B, the document is detected by the sensor 26.
detected. In this way, when both the sensors 26 and 34 are on, the control system is selected to the optical scanning exposure (normal exposure) mode.

Therefore, by pressing the copy button (not shown) after this, the document is automatically fed to a predetermined position on the top surface of the platen glass 1 and stopped there, and the light source 2 moves the document in the direction indicated by the arrow. The toner image formed on the photoreceptor drum 9 is fed from the cassette 31 by the feed roller 33 and onto the transfer paper waiting by the registration roller 11 at a predetermined timing. transcribed.

On the other hand, when the manual tray 32 is tilted in the direction of arrow a, the sensor 34 does not detect the tray 32. Then, when the original is placed on the original plate 21 of the original feeding device B, the original is detected by the sensor 26. In this manner, when the sensor 34 is off and the sensor 26 is on, the control system is selected to the synchronous exposure mode.

Therefore, when the copy button is pressed after this, the light source 2 is positioned on a specific lower surface of the platen glass 1 and stops there, and the original moves at a constant speed over the platen glass 1 and the original is exposed and scanned. A toner image is formed on the photoreceptor drum 9 by the light image in the same manner as described above, and the transfer paper loaded in the manual feed tray 32 is fed by the feed roller 33, and after waiting at the registration silan roller 11, at a predetermined timing. transcribed.

FIG. 2 is a diagram showing a flowchart of a program for selecting the optical operation exposure method and the synchronous exposure method described above. Here, the status is stored as a flag in the memory (RAM) of the control unit of main unit A, and both conditions are Once you have all the information, switch to the synchronous exposure method. Cancellation will occur automatically when both conditions are no longer met.

FIG. 3 is a diagram showing a control section that executes this program. The detection signal of sensor 26.34 is I10 boat 41
The program is taken in from the RAM 44, is sent to the CPU 42, is processed by the program shown in FIG. exposure is controlled.

In the above embodiment, the sensor 34 detects whether or not the manual feed tray 34 is in the upright state, so if it is not completely upright, the sensor 34 will not detect it, and the manual feed mode will be determined. There is a possibility that In order to prevent this, a sensor 34' may be provided so as to detect the state in which the manual tray 34 is tilted down (shape B shown by the solid line in FIG. 1).

In addition, in a copying machine that has a fixed manual feed tray instead of a system in which the manual feed tray 34 is raised and lowered, a sensor that detects whether or not transfer paper is set there may be provided.
The detection signal of the sensor can be used for determining and switching the synchronous exposure mode as in the above embodiment.

〔Effect of the invention〕

As described above, according to the present invention, the synchronous exposure method is automatically selected if a specific condition is met, so there is no need to input an operation at the operation unit, and the operation is simplified. Moreover, since there is no need for an operation button for this purpose, it is also advantageous in terms of cost.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a schematic configuration of a copying apparatus according to an embodiment of the present invention, FIG. 2 is a flowchart of a program for selecting an exposure method, and FIG. 3 is an explanatory diagram of a hardware configuration for executing the program. be. 21...Manuscript device, 32...Manuscript tray. Figure 1 Agent: Patent Attorney Tsuneaki Nagao

Claims (1)

[Claims] (1) In a copying apparatus that is equipped with a document feed section and a transfer paper manual feed section, and in which a synchronous exposure method can be selected, a document is set in the document feed section and the manual feed section is set; A copying apparatus characterized in that the synchronous exposure method is selected by setting paper in a manual feed section.