JPS62290647A - Document handling device - Google Patents

Abstract

PURPOSE:To prevent the damage of a document and improve reliability by providing a document feeding port with a stopper and a document feeding port without a stopper, and preferentially feeding a document from said feeding port without a stopper when documents are set simultaneously to both of the feeding ports, in the captioned device of a copying machine, etc. CONSTITUTION:The sheet detecting signals of the inlet sensor 22 of a digitizer paper feeding port without a stopper and the inlet sensor 3 of a document handling device paper feeding port with a stopper, are inputted into an unshown control device. And, when both of the sensors 22, 3 simultaneously detected documents, a digitizer 26 starts a paper feeding operation making sure that priority is given to the digitizer paper feeding port. Due to such a structure, the damage of a document can be prevented, improving reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Background of the Invention] In general, an image forming apparatus such as a copying machine is sometimes used with an additional document handling device that feeds the document to a predetermined position such as an exposure position. In recent years, new functions have been added to image forming apparatuses such as copying machines that specify a certain area of a document and extract or remove only the specified area to form a copy. When specifying the area at that time, there are known methods in which X-Y coordinates are input, and methods in which the input is performed using a well-known digitizer device. However, conventional digitizer devices are known to be set above the presser plate on the platen glass of a copying machine, but in this case, the operator manually opens the presser plate after using the digitizer to read the original. There is the hassle of replacing it on the platen glass. Furthermore, when the above-mentioned document handling device is installed in a copying machine, there is no space for installing the digitizer device, and if the digitizer device is placed on an external stand, for example, the operator will have to take the trouble of replacing the document, and the installation space will be reduced. The disadvantage is that it gets bigger.

In order to solve these drawbacks, a digitizer device as shown in Figure 1 is integrated on the top surface of the document feeder, and a feed port dedicated to the digitizer is provided separately from the feed roller of the document feeder. However, it is conceivable that the originals ejected from the original feeder are ejected onto the top surface of the cover of the digitizer unit, and the originals ejected from the digitizer device are ejected onto the top surface of the digitizer device.

However, with the above configuration, the feeding port is different depending on whether the digitizer number is used or not, and this has the disadvantage that it is difficult for the operator to understand.

Also, if you accidentally set the original in the two feeding slots,
There were also problems with originals being damaged or remaining in the DF.

[Objective] The present invention has been made in view of the above-mentioned points, and an object thereof is to provide a document handling device that prevents document damage and improves reliability.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of a document handling device (hereinafter referred to as DF) among copying apparatuses to which the present invention can be applied. In the figure, reference numeral 1 denotes an entrance tray on which sheet originals are stacked, and sheet originals 2 are placed on the entrance tray 1 with the lower side in the figure facing up. The first document detection DF input sensor 3 is a reflective sensor that detects the leading and trailing edges of the sheet document, and the feed rollers 4 and 5 press against each other to sandwich and convey the sheet document. A stopper 6 prevents the document from being fed onto the platen glass 10, and is released by the operation of the DF input lost flange solenoid 21 to enable feeding. The full-surface belt 7 is an endless belt with a width that is large enough to cover the entire surface of the sheet document, and the surface of the belt 7 is an endless belt with a width that covers the entire surface of the sheet document.
It has a sufficient coefficient of friction so that it can be conveyed by sliding on the belt, and is wrapped around a drive roller 8 and a turn roller 9, and is configured to prevent the entire surface belt 7 and drive roller 8 from slipping. . Further, the ejection roller 11 is in pressure contact with the entire surface of the belt, and conveys the original ejected from the original glass 10 by sandwiching it, and when the DF output sensor 13 for detecting the original detects the leading edge of the original using a reflective sensor,
The entire belt is once stopped, then run in reverse, and when the DF output sensor 13 detects the trailing edge of the document, it is stopped at a predetermined position. After the exposure operation is completed, the original is sent by the ejection roller 11 and the full-surface belt 7, and is sent along the ejection guide plate until the ejection rollers 15 are brought into pressure contact with each other. 16 and loaded sequentially.

On the other hand, a well-known digitizer 26 is mounted on the top of the DF of the present invention, and a digitizer cover 27 covering the entire surface of the digitizer is placed on top. The ejected document described above is loaded onto this cover.

An opening/closing detection sensor 28 detects opening/closing of this cover.
is installed, and plays an effective role in mode switching, etc., which will be described later. Further, there is a digitizer paper feed port in the upper right corner of the DF that feeds the document on the digitizer, and although it is hidden when the cover is closed, it is exposed when the cover is opened. The digitizer paper feed port includes a digitizer entrance detection sensor 22 that detects the document stacked on the digitizer surface, and uses a reflection type sensor. The feed rollers 23 and 24 press against each other to sandwich and convey the sheet original. The document sent out from the digitizer paper feed port by the conveyance rollers 23, 24 is sent along the guide plate and is sent onto the platen glass from the right end of the above-mentioned full-surface belt.

Motor 1 drives all the rollers and the entire belt.
A clock disk and a sensor 20 are provided which are driven by a clock disk 9 and which generate clock pulses when rotating, and which control the operation of the DF. Flapper 5L
31 is off, the paper discharge rollers 15.31 are inverted and pressed against each other. 16, and are sequentially stacked on the digitizer cover described above.

FIG. 2-1 is a schematic diagram of the digitizer section of the present invention.

This is composed of one each of planar resistors 50 for reading positions in the horizontal direction (X direction) and the vertical direction (Y direction), and a lead pen switch (SW) 51.

The planar resistor 50 is located not only under the sheet where the original is placed, but also under keys such as the clear key 52 and the registration key 53. It is output and read as the setting value of the area or the above key.

The operator places the document face up on the resistor 50 and sets it so that it is aligned with the upper right corner. And pen SW 51
Two points in the area specified by, for example, A, A' point or B.

By pressing point B', the area A-B'-A'-B'-A is specified, and by pressing the registration key 53 (described later) with the pen SW, the area specification is set.For example, the trimming function or the The image conversion function works and a copy as shown in Figure 2-2 is output.

FIG. 3 is a block diagram showing the control section of the DF and copying machine. The controller in the figure is a well-known microcomputer (hereinafter referred to as a microcomputer), which accesses the RAM 110 by a program stored in an internal ROM. The output signal to the DF section is outputted via a driver, and the above-mentioned loads, namely, the forward rotation and reverse rotation signals of the drive motor, the DF input lost collar SL, the digitizer entrance stop collar SL, and the discharge flapper SL are set to 0N10FF. Input signals include the aforementioned sensors, ie, DF input/output sensor, DF output sensor, digitizer population sensor, digitizer opening/closing detection sensor, and clock pulse signals, which are input via a buffer. In addition, the output signal from the digitizer section is an X/Y application switching signal that switches the voltage applied to the digitizer electrode.
' to switch by applying Y-axis voltage. Lead pen 5 as input signal
There are a lead pen signal that is turned on when the first digitizer electrode surface 50 is pressed, and an X-axis input voltage signal and a Y-axis input voltage signal that input analog signals output depending on the pressed position in the X/Y axis directions, respectively. Furthermore, it is configured to output input/output signals to each control section of the copying machine.

FIG. 4 is a detailed flowchart of the operation of the DF of the present invention, and the explanation will be made according to this flow. First 5te
In pl, both the entrance sensor 22 of the digitizer paper feed port without a stopper and the population sensor 3 of the DF paper feed port with a stopper are checked. For example, when sheets are set in both sensors at the same time, the digitizer paper feed operation is started in step 3 by giving priority to the digitizer paper feed port. In other words, it is possible to start feeding paper from the paper feed port without a stopper, while leaving the paper feed port with a stopper on standby.

On the other hand, when there is only DF entrance detection, 5 steps are required for the first time.
This will start the second DF paper feeding operation.

Particularly in 5tep2, while the sheet is being conveyed to the exposure position, it is checked whether the sheet is set on the digitizer entrance detection sensor 22, and if so, the feeding is stopped. This is because if an operator accidentally sets a sheet in the digitizer paper feed slot while feeding a sheet from the DF paper feed slot, there is a possibility that the sheet will be dragged in as there is no stopper in the digitizer paper feed slot. This is because there is. Therefore, by stopping the paper feeding operation when there is a sheet in the digitizer paper feed port, damage to the sheet due to entrainment can be prevented.

And 5tep2. 3, when the sheets arrive at the exposure position, the copying operation is started in 5tep4, and the copying operation for a predetermined number of sheets is waited for.

After copying is completed, the process normally moves to the sheet ejecting operation, but in this embodiment, the process proceeds to step 5.The next operation changes depending on whether the sheet is set in the digitizer paper feed port without a stopper. . In other words, if you try to eject a sheet even though there is a sheet, there is a possibility that the sheet will be pulled into a halfway position, so instead of ejecting it, start the next paper feeding operation instead. At the same time, the previous sheet can also be ejected normally.

Furthermore, if there is no sheet in the digitizer at the end of copying, the process advances to step 5 and a discharge operation is started. In step 5, it is continuously checked whether the next sheet is set in the digitizer paper feed slot while the previous sheet is being ejected. Then, if the sheets are set, all the sheets are also ejected. This is because if the next sheet is set in the digitizer paper feed slot without a stopper while the previous sheet is being ejected, it will inevitably be drawn in, and as mentioned above, if this continues, the next sheet will enter the DF. This is to prevent the problem of the machine stopping and to eject all the paper. In this case, it is conceivable to stop the process immediately after the next sheet is set, but this is not preferable since there is no possibility that the sheet will be damaged, but the sheet will remain in the DF. This method does not cause such inconvenience.

[Effects] As described above, according to the present invention, it is possible to prevent document damage, residue, etc., and improve reliability.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the schematic configuration of the DF, Figure 2-1 is a schematic diagram of the digitizer section, Figure 2-2 is a diagram showing a document image and multiple images, and Figure 3 is the control unit of the DF and copying machine. FIG. 4 is a flowchart of the operation control of the DF. l...Entrance tray, 4.5...Feed roller, 7...Full surface belt, 8...Drive roller, lO...Original glass, 19 ...Motor, 26...Digitizer, 51...1--Lead pen switch.

Claims (1)

[Claims] In a document feeding device that feeds originals one by one from a paper feed port to a document reading position and discharges them to a discharge port after reading, the paper feed port includes a first paper feed port having a stopper and a first paper feed port having a stopper. a second paper feed port, and when documents are set in the first and second paper feed ports at the same time, priority is given to feeding from the second paper feed port. .