JPS60178135A - Paper tray selecting device for duplicator - Google Patents

Abstract

PURPOSE:To prevent the occurrence of erroneous duplication, by a method wherein, in a device which detects the size of a document and selects a paper tray containing papers matching the detected size, when papers having the same size are contained in plural trays, the tray is selected according to the given order of priority. CONSTITUTION:In a duplicator in which plural paper trays 12, which are capable of containing papers 11 being different in size, are located vertically in plural stages to the side of a duplicator body 1, when an automatic tray selection key on a control panel is controlled, no-object scanning of a light source 4 is firstly effected, the size of a document 2 on a platen 3 is detected by a document size detector 7. A paper size signal, previously detected by a paper size detector 29, is collated with a document size signal to decide the paper tray 12 for the same size. In which case, if there are the plural paper trays 12 for the same size, the paper tray 12, to which papers are fed, is decided according to the previously set order of priority, the display light of the such tray is lighted and simultaneously duplicating operation is started.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a paper tray selection device for a copying machine that selects paper trays according to preset priorities.

BACKGROUND ART Conventionally, in order to save the trouble of replacing paper trays every time the size of the original to be copied changes, a copying machine is equipped with multiple paper trays each containing paper of different sizes in the main body of the copying machine. It is publicly known. With such copying machines, copies of the desired size can be obtained by simply specifying the paper size using a key, but on the other hand, due to operational errors or copying without checking the size of the paper stored in the paper tray, Copying errors that prevent copies of the desired size are likely to occur. To improve this problem, a paper tray selection device rt has been proposed that detects the size of the document set on the platen and automatically selects paper of the same size, but the conventional selection device described above In this case, if a number of paper trays contain different types of paper of the same size, if paper is fed from multiple paper trays at the same time, or if there is no paper of the same size as the original, copying will be performed on paper of a different size. There was a problem that caused a copying error.

Purpose of the Invention The present invention has been made for the purpose of improving the above-mentioned problems, and provides a copying apparatus in which, when paper of the same size is stored in a plurality of paper trays, a paper tray is selected according to a preset priority order. The present invention provides a paper tray selection device for a machine to reduce wastage of paper due to copying errors.

Structure of the invention JJ71. m1''JJ size and automatically selects a paper tray containing paper that fits the size, if paper of the same size is stored in the paper tray, it is selected according to the preset priority order. A paper tray selection device for a copying machine, which selects a paper tray and, if there is no paper tray of the same size as the original, issues a warning and at the same time prohibits copying.

Embodiment The present invention will be described in detail below with reference to an illustrated embodiment.
In the figure, 1 is the main body of the copying machine, and the original 2 to be copied is on the top.
It has a platen 3 on which a document 2'fr is placed, and a document 2'fr,
A light source 4 for illumination and an optical system 6 for guiding reflected light from the original 2 to the photoreceptor 5 are installed, respectively. A document size detector 7 that moves together with the light source 4 and detects the size of the document 2 on the platen 3 is provided near the light source 4. .37, the horizontal magnification can be varied by varying the mirror 61Z and the lens 6b, and the vertical magnification can be varied by fully varying the speed of the light source 4 by the light source drive system 35 consisting of a DC servo motor. It has a function,
The light source drive system 35 determines the moving speed of the light source 4 in synchronization with a clock frequency from a clock generator 32 of a control circuit (see FIG. 2), which will be described later. The size of the original 2 is detected from the time it takes for the light source 4 to separate from the original 2 and the moving speed of the light source 4.

On the other hand, a developing device 8, a transfer device 9. A fixing device 10 and the like are installed, and a plurality of paper trays 12 each containing sheets 11 of different sizes are installed in a plurality of stages in the vertical direction on the side of the main body 1. Each of the paper trays 12 is provided with magnets with different positions depending on the size, and when these magnets are detected by a magnet switch (hereinafter referred to as paper size) installed on the side of the main body 1, , the paper size in each paper tray 12 is detected.

Further, an operation panel 13 as shown in FIG. 3 is provided on the upper part of the main body 1. The operation panel 13 includes copy start and stop keys 1'4. l'5, a numeric keypad 16 for setting the number of copies, a clear key 17, a display 181 for displaying the number of copies, etc., an equal magnification key 19, a reduction key 20. Automatic magnification selection key 21. An automatic tray selection key 22, paper tray selection keys 23, 24, 25, and an indicator light 26 for displaying the reduction ratio are provided, and signals from these keys are transmitted to the document size detector 7 and the light source position primary detector. 271 and the signals from the paper jam detector 28 and the paper size detector 29 are input to the central processing unit 31 via the input interface circuit 30. The central processing unit 31 has a clock oscillator 32 and a memory circuit 33, and a light source drive system 35. Variable power lens drive system 36. A variable magnification mirror drive system 37%, a paper feeder drive system 3g, a main motor drive system 39, a display 18 on the operation panel 13, and the like are connected, respectively.

Next, the operation will be explained with reference to the chart 70 shown in FIG. The loading unit 11 determines whether the mode is automatic magnification selection mode or automatic tray selection mode, and if it is automatic magnification selection mode, it scans the light source 4 blankly and detects the document size detector 7.
The size of the document on the platen 3 is detected. The original size signal detected by the original size detector 7 is input to the central processing unit 31 via the input interface circuit 30, and the magnification is determined from a table stored in the storage circuit 33 in advance. Lens drive system 3 depending on magnification
6 and mirror drive system 37 move lens 6α and mirror 6t to respective determined magnification positions. After that, Stesogame
Proceed to and copying will begin. If the automatic magnification selection mode and automatic tray selection mode are not selected in step (2), the process advances to step (2) and normal copying is performed.

On the other hand, if the automatic tray selection mode is selected in step ■, the process proceeds to step ■, where the light source 4 is idle scanned,
The size of the document 2 on the platen 3 is detected by the document size detector 7.

The size signal detected by the size detector 7 is taken into the central processing unit 31, where it is compared with the paper size signal inputted in advance from the paper size detector 29 in step 2, and the process proceeds to step 2. A paper tray 12 having the same size as the original 2 is determined. If there are paper trays 12 of the same size, proceed to step ■ and install paper trays 1 of the same size.
It is determined whether there are a plurality of paper trays 12, and if there are not a plurality of paper trays 2, the process proceeds to step (3) and the paper tray 12 is determined. Once the paper tray 12 to which paper is to be fed is determined, the process proceeds to step 2 to start the copying operation.

If there are multiple paper trays 12 of the same size in step (2), the process proceeds to step (2) and the paper trays 12 feed paper according to the priority order stored in advance in the storage circuit 33.
is determined, the indicator light for that tray is turned on, and the process proceeds to step (3) to start the copying operation.

Note that the priority order of the paper trays 12 may be freely changed by a switch means.

On the other hand, in step ■, the paper tray 12 of the same size as the original 2 is
If there is no paper tray 12 of the same size, the indicator light for checking the tray size will flash, warning that there is no paper tray 12 of the same size, the light source 4 will return to the home position and stop, and the copying operation will start. Not done.

Effects of the Invention As described in detail above, in this invention, if the automatic tray selection mode is selected in advance using the automatic tray selection key, even if multiple paper trays contain sheets of the same size,
Since the paper trays are selected according to the preset priority order, it is possible to prevent paper from being fed to multiple paper trays at the same time. With this, for example, sheets of the same size and different types such as colors can be stored in advance in a plurality of paper trays, and copying can be performed on the desired sheet, and copying errors caused by forgetting to select the sheet can be prevented.

Additionally, if there is no paper of the same size as the original, the operator is alerted and copying does not start, which prevents copying errors such as copying onto paper of an undesired size. It becomes possible to reduce wasted time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being an overall configuration diagram and FIG. 2 being a block diagram of a control system. FIG. 3 is a plan view of the operating panel, and FIG. 4 is a flowchart showing the operation. 2 is the document percentage; 3 is the platen; 6 is the optical system; 7 is the document size detector; 11 is the paper; 12 is the paper tray; 29 is the paper size detector. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A plurality of paper trays 12 containing sheets 11 of the same size or different sizes, and a document size detector 7 that detects the size of the original 2 placed on the platen 3 to be copied.
and a paper size detector 29 for detecting the size of the paper 11 housed in the paper tray 12, and visually selects all paper trays 12 of the same size based on the document size signal detected by the size detector 7. When there are multiple paper trays 12 containing paper 11 of the same size, the paper tray 12 to be fed is selected according to a preset priority order, and if there is no paper tray 12 of the same size as the original 2. A paper tray selection device for a copying machine, characterized in that if such a case occurs, the paper tray selection device for a copying machine is configured to warn the user and prohibit copying operations.