JPS6042936B2 - electronic copy machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electronic copying machine.

Conventionally, electronic copying machines have been used which can switch the slit exposure optical system between scanning and static.
A sheet document feeder performs slit exposure while moving the document, and a sheet document feeder feeds the document to a predetermined position. There are known electronic copying machines that slit-expose a document that is stationary at a fixed position, but these electronic copying machines have the disadvantage that they are complicated to operate because they do not switch copying operations in conjunction with a preset counter that sets the number of copies. There is. An object of the present invention is to be able to switch copying operations in conjunction with each other as a preset counter, and to be able to switch the copying operation in conjunction with each other as a preset counter, and to be able to perform both one copying for one original and multiple copies for one original. An object of the present invention is to provide an electronic copying machine that does not reduce copying speed.

The present invention will be explained below based on the illustrated embodiments.

In FIG. 1, reference numeral 1 indicates a contact glass. An automatic document feeder 2 is provided above the contact glass 1. The automatic document feeder 2 includes a document holder 2a that receives a plurality of sheet documents 3, and a paper feed roller that is provided at the bottom of the document holder 2a and feeds the sheet documents 3 one by one toward a contact glass 1. 2b,
2b, and a guide plate 2 that guides the sheet document 3 fed from the paper feed rollers 2b, 2b to the contact glass 1.
c, a conveyance means 2d for moving the sheet original 3 on the contact glass 1 at high speed in the direction of arrow A, a copied original holder 2e for storing the copied original, and a sheet original 3 from the contact glass 1. The above copy finished document holder 2
It consists of a guide plate 2f that guides in the direction e, and a discharge roller 2g that sends out the sheet document 3 on the guide plate 2f to the copy-completed document receiving table 2e. The conveyance means 2d is composed of a drive roller 2d1, a guide roller 2d2, a guide roller 2d3, and a belt 2c14 attached to these, and is configured to move the belt 2d4 in the direction of arrow B at a speed V. . When a preset counter (not shown) for setting the number of copies (number of sheets) for one document is set to 1, the document feeder 2 moves the sheet document 3 along the contact glass 1 with an arrow. Speed in direction A■
On the other hand, if a number of 2 or more is set in the preset counter, the automatic document feeder 2 moves the sheet document 3 along the contact glass 1 in the direction of the arrow. It is moved to a predetermined position in the direction A, and after stopping at that position for a certain period of time (exposure time), it is sent to the copy-completed original holder 2e.

A drum-shaped photoreceptor 4 is arranged below the contact glass 1 and rotates in the direction of arrow C at a peripheral speed of ■. An optical system for forming an image of the sheet original 3 on the contact glass 1 is provided on the photoreceptor 4 . This optical system includes an illumination means 5 consisting of a lamp 5a and a reflector 5b, a first mirror 6, a second mirror 7, an in-mirror lens 8, and a third mirror 9. When the copy counter is set to 1 and the sheet original 3 is moving at a speed V in the direction of arrow A, the optical system remains at the position shown in the figure and exposes the image of the sheet original 3 in the form of a slit. On the other hand, when a value of 2 or more is set in the preset counter and the sheet original 3 is stationary on the contact glass 1, the illumination means 5 and the first mirror 6 move in the direction of the arrow D at a speed V. The second mirror 7 moves in the direction of arrow E at a speed of 112 cm to scan the sheet original 3 and perform slit exposure, and then moves in the direction opposite to arrows D and E to return to its original position. is repeated the number of times set in the preset counter. Note that if a number of 2 or more is set on the preset counter, the copying progresses and the number on the preset counter decreases until it reaches 1. In this case, the sheet original 3 is moved and the optical system is kept stationary. It is necessary to prevent the operation from switching to slit exposure. To do this, if the preset counter is set to 1 from the beginning, the preset counter will not operate, and if the preset counter is set to a number of 2 or more, the exposure operation will progress and the number will change. If it decreases to 1, the preset counter will be activated.
The distinction between activation and non-activation of the preset counter can be used. A charging device, a developing device, a transfer device, a neutralizing device, a cleaning device (not shown), etc. similar to those of a conventional electronic copying machine are arranged near the photoreceptor.

Next, the present invention will be described in detail with reference to the flowchart shown in FIG.

Set the number of copies on the preset counter and press the start button.

In this case, in the case of one-time copying, slit exposure is performed with the optical system stationary while moving the sheet original 3 using the automatic document feeder 2, and then the sheet original 3 is ejected by the ejection roller 2g. When a sheet original 3 remains on the original holder 2a, the next sheet original 3 is moved along the contact glass 1 while performing slit exposure with the optical system stationary, and the sheet original 3 is ejected and placed on the original holder 2a. 2
When there is no sheet document 3 remaining in a, the operation of the automatic document feeder 2 is stopped. If it is not a single copy, the sheet original 3 is sent out from the original holder 2a, stopped at the exposure position, and scanned with the optical system the number of times set in the preset counter, performing slit exposure that number of times. Next, eject the sheet original 3, and
If sheet original 3 remains in a, feed sheet original 3 from original holder 2a, stop it at the exposure position, scan the optical system the number of times set in the preset counter, and scan the number of times. After slit exposure is performed, if no sheet original 3 remains on the original holder 3, the automatic original feeder 2 and the optical system stop operating. Note that the automatic document feeder 2 is made removable, and books can be read with the automatic document feeder removed from the contact glass.
It can be configured to copy other three-dimensional object originals, but in this case, one three-dimensional object original
Unlike the sheet original 3, when performing multiple copies, it is necessary to scan the three-dimensional original in a stationary state and perform slit exposure by scanning the optical system. , it is necessary to use another means to switch the mode of slit exposure. The present invention works in conjunction with a preset counter to perform slit exposure by keeping the optical system stationary while moving the sheet document when copying one sheet document once. When copying multiple times, the optical system scans the sheet document while it is still, so there is no need to change the structure of the exposure optical system for repeat copying, and the operation is easy. This also has the effect of increasing the copying speed.

[Brief explanation of drawings]

FIG. 1 is a layout diagram showing only the main parts of the electronic copying machine of the present invention;
FIG. 2 is a flowchart showing the operation of the electronic copying machine. 1... Contact glass, 2... Automatic document feeder, 3... Sheet original, 4...
- Photoreceptor, 5... Illumination means, 6... First mirror, 7... Second mirror 8... In-mirror lens, 9... Third mirror.

Claims (1)

[Claims] 1. A first exposure device that performs slit exposure by moving the original on the original placing table and keeping the optical system stationary; and a first exposure device that performs slit exposure by moving the original on the original placing table and making the original stand still at the exposure position by feeding the original onto the original placing table and making the original stand still at the exposure position. The first exposure device and the second exposure device have the same optical system consisting of lamps, mirrors, lenses, etc., and when one copy is made for one document, the above-mentioned The operation of the first exposure device and the second exposure device can be switched in conjunction with a preset counter so that when the first exposure device is used and one document is copied multiple times, the second exposure device is used. Features of electronic copying machines.