JPS6036236A - Document carrying method - Google Patents

Abstract

PURPOSE:To improve document delivery ability by initiating next paper feed when the leading edge of a document reaches a position, a prescribed distance on this side from a discharge roller in the captioned method wherein the document is stopped when the rear end thereof makes coincidence with a document stop reference position. CONSTITUTION:When documents are placed at a prescribed position on a document table 1 and a document set sensor 2 is turned on, a document separating belt 3 is rotated, and only one sheet of said documents completely separated on a separating plate 4 is carried by a delivery roller 5 and a conveyer belt 9 onto contact glass 13. When the rear end of the document reaches a reference position A, the document is stopped and subjected to an exposure treatment. When a document discharge signal is supplied after exposure completion, the document is discharged on the tray 12 side by the conveyer belt 9 and the paper feed roller 11. When the leading edge of the discharged document on the document table reaches a position, a distance D up to the reference stop position A, on this side from the discharge roller 11, paper feed for the next document is initiated.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a document conveying method in a copying machine, a facsimile machine, etc.

Prior Art In the document feeder of a conventional copying machine, feeding of the next document starts when the document ejected after exposure reaches the ejection sensor at a predetermined ejection position, so there is a time lag between ejection and feeding. This method has the disadvantage that it causes gaps and slows down the processing speed.

On the other hand, a method has also been proposed in which the next document is temporarily advanced to the position of the paper feed sensor during the exposure operation, and the feeding of the next document is started when the discharged document reaches the paper discharge sensor. This method is slightly faster than method 2, but if the next document comes to the paper feed sensor and the power is turned off while the document is waiting, the power will be turned off. When it is turned on again, it returns to the initial state,
At this time, if any sensor other than the original 7-bit sensor that confirms that the original is set is ON, a jam display will appear indicating that the original is jammed, or cancel the original transport mode that automatically transports the original. To switch to a pressure plate copy mode in which a single-sheet original is manually fed to an exposure position. The reason is that when the paper feed sensor is ON, the document transport mode can be continued, and the paper feed sensor may have reached 0 NVC due to the document arriving normally during continuous paper feeding, or the document may have jammed. This is because it is difficult to determine whether the paper feed sensor is turned on depending on the jammed document, and in some cases, an attempt to drive the jammed document further may result in further damage to the document.

This shows that although continuous paper feeding is possible normally, electrolytic corrosion occurs.
There have been disadvantages in that even if the FF development occurs in the middle, the shirt and display will appear, necessitating extra work, and it will be necessary to feed the original by hand, impeding work efficiency.

Furthermore, there is a method of starting paper ejection and feeding the document from the set position at the same time, but with this method, the ejected original is not completely ejected and the document stops with some of the original coming out from the ejection roller. Since the discharge drive will be performed again,
This has the disadvantage that the inertia is greatly reduced, and the stacking or ejection performance of aligning and storing the documents in a predetermined position is degraded.

OBJECT OF THE INVENTION It is an object of the present invention to provide a document transport method that eliminates the above-mentioned drawbacks of conventional document feeding, improves processing capacity, and reliably ejects documents without switching modes midway. The purpose is

Configuration The configuration of the present invention that achieves the above object will be explained based on the embodiment shown in the drawings.

In FIG. 1, an original is set on an original table l. When the original is set in a predetermined position, the original setting sensor 2 is turned on.

When a document feed signal is given while the document set sensor 2 is ON, the drive roller 6 around which the document separation belt 3 is wrapped
is driven, and the separation belt 3 rises above the surface of the document table 9 and begins to feed one document.

The document conveyed by the separation belt 3 is completely separated by the separation blade 4, and only one sheet is pulled out by the drawer roller 5, and then transferred to the contact glass 1 by the conveyance belt 9.
3. During this time, the document sequentially passes through a plurality of document size detection sensors 7 and paper feed sensors 8, which are arranged behind the pull-out roller 5 in the direction in which the document travels, and which are arranged side by side in the width direction that intersects the direction of travel. Stops at the reference position. For example, in the figure, the document stop reference position is when the trailing edge of the document reaches position A. That is, position A becomes the document stop reference position.

The document size detected by the document size detection sensor 7 when the document passes is stored in a storage device of the control device (not shown).

When the document discharge signal is given after exposure, the conveyor belt 9
The drive roller that has been wrapped around it is driven, and the exposed document is ejected.

At that time, the original passes through the paper ejection sensor io, and the paper ejection roller 11
is discharged to Toy 1/I 12.

When automatically and continuously feeding originals, in order to completely eject the ejected original onto the tray 12, the leading edge of the ejected original must be moved by the distance that the leading edge of the original on the document table 1 reaches the original stop reference position A. It is only necessary to scoot the fed document when it reaches position B before the discharge roller 11. In this case, the document may be frictionally moved by the previous document to the position where the leading edge is pressed by the separating blade 4, so the shortest distance is the distance from the document stopping reference position A to the leading edge position of the separating blade 4. Take. In the illustrated example, the number is 150, for example.

As a general rule, originals are sent horizontally, that is, arranged so that the width is longer than the direction of travel.The width of the paper, that is, the length in the direction of feed, is as shown in Table 1, assuming that the size of the paper is the standard size. be.

The maximum size of all transported documents is A3 size, and the ejection roller 1
If the distance between the document stop reference position A and the document stop reference position A is, for example, 450 ms, the distance S between the document stop reference position A and the document stop reference position A is 3 o ma.

When a document of each size is stopped at the reference position, the distance from the leading edge of the document to point B is, for example, 3 in A3 size, and the distance for each size is as shown in Table 1.β) Point A and point B The distance between the two can be set arbitrarily as long as it is 297 ma or more.

When controlling the motor that drives the conveyor belt 9 by pulse V
If the C1 pulse causes 19 movements, the leading edge will reach point B in 3 pulses in the case of an A3 size document. Table 1 shows the number of pulses for the movement control to reach point B for each size of original. That is, it is possible to detect that the leading edge of the paper has reached point B based on the number of pulses after the start of paper ejection, that is, after the drive motor of the conveyor belt 9 starts driving.

When feeding a document, the document size detection sensor 7 detects and stores the size, so after the conveyance belt 9 starts discharging the document, the number of movement control pulses calculated from the memorized document size can be monitored. If the paper feed signal is issued at this point, the leading edge of the ejected original will reach point B, after which feeding of the next original will begin.

Since this invention is based on the premise that originals of different sizes are not mixed among the originals, when the rear edge of the next original (height) reaches the original stop reference position A, the rear edge of the ejected original has just reached the ejection roller. 11, and the ejected document can be completely ejected without stopping midway.

As mentioned above, when the leading edge of the ejected original reaches point B, it is detected by the number of pulses determined according to the original size, but when the 1lf47p' optical sensor of the conveyance device etc. can be used, a normal sensor is detected at the position of point B. It can also be detected by installing a sensor. In this case, the document size detection can be omitted.

If the conveyance speed of paper is 600 vun/sec, conventionally for A4 size example, it would be 111' 1210+150++450-210))/600 =
It took 1 sec to replace the original, but with the present invention, the time can be reduced to 450/600=0, 75 sec. This shows that the number of sheets processed per minute is 33 sheets per minute in the conventional case, but increases to 38.7 sheets in the present invention.

If the 1st drive motor of the separating section before the pull-out roller and the 1st drive motor of the conveyor belt are separated, the distance between points A and B can be reduced due to the delay in the rising of the separating section, and the throughput can be increased. .

The operation according to the present invention will be explained with reference to the flowchart shown in FIG.

When a document is fed, the document size detection sensor 7 performs size detection [step (1)].

For size detection, sensor A detects A3 size.
3 is ON (step (1-1)).

If step (1-1) is YES, memo l] - (7)
A 3 Tateru FVcl (step (1-2)) If step [1-1) is NO, determine whether sensor B4 is ON (step (1-3)) Step "1-3
) is YES, set 1 to B 4 F in the memory (step ('l-4)).

When step (1-a) is NO, sensor A4 is ON
Determine whether or not (step ('1-.5)) If step (1-5) is YES, write 1 to A 4 F of memory.
(Step ('t-6)).

When step (1-5) is No, determine whether sensor BS is ON or not (step ('L-7)) Step (1
-7) is YES, set 1 to B5F of memory (
Step (1-8)).

When step (x-7) is No, sensor A5 is ON
Determine whether or not (step (1-9')) Step (
When 1-9) is YES, 1 is written in A5F of the memory (step (1-10)').

When step (l-9) is No, -F, that is, when the paper size is A5 or smaller, it is assumed to be B6 here, and 1 is set in B6F of memo υ- (step ('l-11)).
.

The main routine includes a step (
Step (2)] is provided. When step (2) is NO, determine whether a paper feed command is issued, that is, whether paper feed F is 1 or not (distortion force) (step (3)).Step (3)
When is YES, perform paper feeding start processing (step (
4)). If step (3) is NO, proceed to the next step or repeat step (2).

The main routine includes step C to determine whether or not paper is being ejected.
Step (5)) is provided.

When step (5) is YES, it is determined whether a predetermined number of pulses have elapsed, that is, whether or not the pulse count F is 1 (step (6)).

If step (6) is NO, call up the stored paper size. In other words, first of all, whether it is A3 size or not, that is, A3F.
Determines whether or not is 1 (step (7)). When step (7) is YES, determines whether the number of pulses required for paper feeding has elapsed, that is, whether the count number is 3 or not. (Step (8)).Step (8) is YES
Issue a paper feed command when , that is, set 1 to paper feed F (
Step (9)). When the paper feed F is set to 1 in step (9), the result of determination in step (3) is Y.
It becomes ES.

When step (7) is No, it is determined whether B4F is 1 (step (10)). Step (10) is Y
When ES, determine whether the count number ≧ 43 (
Step (11)). If step (11) is YES, □ paper feed F is set to 1 in step (9).

If step (10) is No, it is determined whether A4F is l [step (12)].

When step (12) is YES, it is determined whether the count number is greater than or equal to 90 (step (13)).

When step (13) is YES, paper feed F is set to 1 in step (9).

When step (12) is No, it is determined whether B5F is 1 (step (14)). Step (14
) is YES, it is determined whether the count number≧118 (step (15)).

When step (L5) is YES, 1 is set in paper feed F in step (9).

When step (14) is No, it is determined whether A 5 I'' is 1 (step (16)). Step (1
If 6) is YES, it is determined whether the Gaunt number≧152 (step (17)).

When step (17) is YES, paper feed F is set to 1 in step (9).

When step (16) is No, it is determined whether or not the count number is greater than or equal to 172 (step (18)).

When step (18) is YES, step (9) sets paper feed F to 1. When step (18) is NO, step (18) is repeated again. If step (8), step (11), step (13), step (15), or step (17) is a false NO, the steps are repeated.

In step (9), 1 is set in the paper feed F.
, the pulse count F is set to 1 (step (1)
9)). After step (19), the main routine proceeds to other steps.

When step (6) is YES, the main routine proceeds to the next step.

If the answer to step (5) is NO, proceed to another step of the main routine or repeat step (5) again.

Effects According to the present invention, the paper feeding starts completely before the ejected original reaches the ejecting roller, and when the next fed original stops at the reference position, the trailing edge of the ejected original can reach the ejecting roller.
This makes it possible to speed up the feeding and ejection process without impairing the ejection performance of ejected originals.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a document conveying device according to the present invention, and FIG. 2 is a flowchart. 2... Original set sensor 3.1. Document separation belt 7...Document size detection sensor 8...Paper feed sensor 9...Transportation bell 1, 11...
・Discharge roller A...Document stop reference position ・'----] Agent Patent attorney Hisashi Ito 6) 2, -, "j
j,:',i"'j

Claims (1)

[Claims] In a document conveyance method in which a document is conveyed by a conveyor belt and the document is stopped when the rear edge of the document is aligned with the document stop reference position, a method is used to ensure that the leading edge of the document to be discharged reaches a position a predetermined distance before the discharge roller. A document conveying method characterized in that the feeding of the next document is started upon detection.