JPS5978052A - Manuscript handling apparatus - Google Patents

Abstract

PURPOSE:To permit feed of the succeeding manuscript in the shortest feeding time in accordance with the size of the manuscript by detecting the size of the manuscript and controlling the manuscript feeding timing in accordance with the detected size and the length of a discharge passage. CONSTITUTION:A manuscript 2 for which copying operation in set pieces is completed at an exposure position is discharged by the drive of a whole-surface belt 7. When the top edge is detected by a discharge detection sensor 13, the length ld of the manuscript is obtained from the timer value on a size-detection sensor in the second manuscript detection sensor 6 and the transfer speed, and the manuscript interval li is obtained from the length L of a transfer passage which leads from feed rollers 4 and 5 to the sensor. Then, the above-described value is compared with the length lo between sensor 13 to paper discharge rollers 15 and 16, and if lo>li, feed of the succeeding manuscript 2 is started, and if lo<li, the lo-ld/ transfer speed is calculated, and a delay timer is set, and after the time lapses, feed of the succeeding manuscript is started. Thus, jamming of paper is prevented.

Description

Detailed Description of the Invention Technical Field The present invention relates to an original document that feeds an original document to an exposure position, ejects the original document from the exposure position after completion of exposure, and controls the feeding of the next original document according to the original size. 0 Related to Handling Apparatus Conventionally, in a copying machine, etc., a document handling apparatus feeds a document sheet by sheet to an exposure position, ejects the document at the exposure position after exposure, and feeds the next document to the exposure position. may be added and used.

In such a document feeding device, the timing of feeding the document to the exposure position and the timing of discharging the document from the exposure position are determined in advance, and for example, the length of the discharge path from the exposure position is determined in advance. In a document handling device where the feeding interval may be longer than the original feeding interval depending on the document, the feeding timing of the next document should be delayed by 1:Ij timing or υ depending on the maximum size document that can be used. It was decided.

Therefore, in such a document handling device, even when using a small-sized document, the document is fed at the same timing as the largest-sized document, so it takes longer than necessary to feed the document. , there was a drawback that the start of copying was delayed.

Purpose The present invention has been made in view of the above points, and an object of the present invention is to provide a document handling device capable of controlling the handling of a document according to the size of the document.

Another object of the present invention is to provide a document handling device that can shorten the time required to feed a document, hasten the start of copying, and shorten the copying time.

Example Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the document handling device of the present invention. In the figure, reference numeral 1 denotes a tray for stacking sheet originals, and the sheet originals 2 on the tray 1 are stacked with the lower side in the figure facing up (image side). 0, which is a reflective sensor that detects the presence or absence of
The feed rollers 4 and 5 press against each other to sandwich and convey the sheet document. The second document detection sensor 6 is a reflective sensor that detects the leading edge and trailing edge of the sheet document.

By detecting the leading edge of the document, the document detection sensor 6 performs control to stop the document at the exposure position. Further, based on the output of the document detection sensor 6, the document size is determined as described later. The full-surface belt 7 is an endless belt with a width large enough to cover the entire surface of the sheet document, and its surface has a sufficient coefficient of friction to allow the document to slide and be conveyed on the document glass 10 using frictional force. The entire belt 7 and the mnrb roller 8, which are applied to the drive roller 8 and the Coon roller 9, are constructed so as not to cause I+itυ. Furthermore, the ejection rows 211 and 12 are in pressure contact with each other, sandwiching and ejecting the original that has been copied on the original glass 10, and the ejection detection sensor 13 detects the ejected original using a reflective sensor. Discharge roller 11,1
The originals sent by 2 are sent along a paper ejection guide plate 14, and are sequentially loaded onto a paper ejection tray 17 by paper ejection rollers 15 and 16 that are in pressure contact with each other.

The feed roller 4 is driven by a drive motor 21 (FIG. 3) through a clutch 18, and the entire surface belt drive roller and discharge rollers 11 and 15 are driven by the drive motor 21 (FIG. 3).
1 is transmitted by a clutch 19.

The time elapsed by detecting the leading and trailing edges of the original is detected, and the size of the original is detected according to this passing time.

The feeding timing of the next original is controlled according to the original size. This will be further explained with reference to FIG. 2-1.2.

Figures 2-1.2 are No. 1-7 sizes (4R), respectively.

FIG. 2 is a diagram for explaining the feeding of B4R, A4, B5) originals and full-size originals (A3.B4).

In the figure, the length of the document is ed, the length of the ejection path from the feed roller 4.5 to the upper ejection detection sensor 13 is L1, the length from the ejection detection sensor 13 to the ejection roller 15°16 is I! If the original is of size -7, the interval (L-/d) between the original at the exposure position and the next fed original is ei
, is expressed as .

Further, in the case of a full-size original, the above-mentioned interval is ei.

It is expressed as

In this example, A'i, > to > I! It is the length of the discharge channel e. is designed.

For this reason! 1m>1. In the case of a 1-7 size original where The feeding of the original to the exposure position 11' is controlled so that the ejection of the original at the exposure position υ is delayed by a predetermined time and then started.

Next, FIG. 3 is a block diagram showing a control section of a document handling device (hereinafter referred to as FDP). In the figure, 30 is a well-known microcomputer (hereinafter referred to as μCOM) with a memory υ, IN
T is an interrupt port, and a pulse signal from the clock generator 20 when the drive motor 21 rotates is input. The operation of the DF is controlled based on this pulse signal.

Irukapo-)P. The signal SO from the first document detection sensor 3 is input to the input port PI, the signal S1 from the second document detection sensor 6 is input to the input port PI, and the signal S1 from the discharge detection sensor 13 is input to the input port P. A signal S2 is input. Also, output ports F0 to F.

Based on the input signal to μC0M30, the drive signal for the drive motor 17 is sent via the drivers D1 to D4, respectively.
A drive signal for the clutch 18, a drive signal for the clutch 19, and a lighting signal for the JAMLAMP 22 are output.

Furthermore, the DI" start signal from the copying machine main body is input to the input port P, and the copy start signal to the copying machine main body is output from the output port F4. Also, from the output port F, the detected Original size data is output to the copying machine main body.The copying machine main body selects a cassette, displays, etc. according to this original size data.

FIG. 4 is a flowchart showing an embodiment of the present invention, and the above-mentioned document feeding control will be further explained below according to this flowchart.

A document is placed on the entrance tray 1, and the document is detected by the first document detection sensor 3.
is turned on, and the document is fed and transported (step 2). It continues to monitor whether the leading edge of the document reaches the second document detection sensor 6, and when it is detected, starts counting the size detection timer Ti and document stop timer Ts.
p3).

The count of each timer is incremented by pulse in number 1 from the clock generator 20. Next, the second document detection sensor 6 monitors the trailing edge of the document, and when it detects the rear end of the document, the count of the size detection timer Ti is stopped, and the timer value is used as the original size data. C
Store in data memory in OM 30 (5tep4
). Next, the system waits until the count of the document stop timer T's ends, and at the time the count ends, the drive motor 21. Clutch 18.
Turn off the clutch 19, stop the original at a predetermined position (exposure position) on the original glass 10, and apply C0PYS to the main body copying machine.
By outputting the TAl'jT signal, the copying machine main body side starts the copying operation (step 5).

When the copying operation for the set number of sheets is completed on the copying machine main unit side and the DFST and ■T signals are input from the main unit side (5tep6)
, determines whether or not the first document detection setter 3 detects a document, and if so, turns on the drive motor and clutch 19, drives the full-surface belt 7, and starts discharging the document at the exposure position. (5 step 7). Emission detection sensor 13
When the leading edge of the document is detected, the size detection timer Ti
The document length/'d is determined by multiplying the timer value by the transport speed. Then, the discharge detection sensor 13 is detected from the feed rollers 4 and 5.
Subtract the document length/d from the conveyance path length up to this point, and then calculate the document interval/? Find i (5step 8).

Next, compare the length eo of the paper ejection path from the ejection detection sensor] 3 to the ejection rollers 15 and 16 with the document interval, and find that 1o > 11
If not, the process returns to step 2 and starts feeding the next document. If eo > ei, then calculate eO'd/(transport x yu) and set the result to the delay timer Td.
ep9), after the time has elapsed, the process returns to step 2 and starts feeding the next original.

In addition, if the first original detection sensor 3 does not detect the next original to be fed, the drive separator b motor and clutch 19 are turned on to eject the original at the exposed position, and the ejection timer TO is activated. Stir (5 steps 10).

When the paper ejection timer To times up, the drive motor ',
, turn off the bQP clutch 19 and return to the beginning.

In addition, the above tie-q Ti, Ts, Td, To are μ
This is a timer provided in the data memory of c0M30 and created by software.

In this way, the interval at which the originals are conveyed is kept to the minimum necessary depending on the original size, so jamming of the ejected originals is prevented, and unnecessary time is not required when feeding the originals.

It is also possible to control the timer time etc. for detecting a C jam depending on the document size.

As described above, according to the present invention, the document size is detected and the document feeding timing is controlled according to the detected document size and the length of the ejection path. The next document can be fed within the feeding time, reducing the time required for copying.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a document feeding device to which the present invention can be applied, Fig. 2-1 is a diagram illustrating how a full-size original is fed, and Fig. 2-2 is a diagram illustrating how a full-size original is fed. FIG. 3 is a block diagram showing a control section of the document feeding apparatus according to the present invention, and FIG. 4 is a flowchart showing an embodiment of the present invention. 1 is the population tray, 3 and 6 are document detection sensors, and 4.5 is the feed! 70-ra, 7 is a full-surface belt, 8 is a driving roller, 2.9 is a turn roller, 11.12 is an ejection roller, 13 is an ejection detection sensor, 15 and 16 are paper ejection rollers, 17 is a paper ejection tray, 18.19 21 is a drive motor, and 30 is a microcomputer. Applicant Canon Co., Ltd.

Claims (4)

[Claims] (1) A document feeding device that feeds the document to the exposure position, and after completion of exposure, discharges the document from the front 11'' exposure position to the storage section via the discharge path and feeds the next document to the exposure position. A document handling device characterized in that the document size is detected and the handling of the document is controlled according to the detected document size. (2) Claim 1 is characterized in that the original document feeding timing is controlled by determining the document interval from the document size and comparing the document interval with the length of the old discharge path. Manuscript handling device. (3) In claim 2, when the length of the conveyance path is longer than the document interval, the feeding timing is delayed from the timing of ejecting the document from the exposure position. Manuscript handling device. (4) In claim 2 or 3,
A document handling device characterized in that when the length of the conveyance path is shorter than the document interval, the feeding timing and the timing of ejecting the document from the exposure position are simultaneous.