JPS5964444A - Paper conveyance detection device - Google Patents

Abstract

PURPOSE:To have accurate sensing of the transport of sheets with a simple mechanism by reading the identification mark of that one of the sheets loaded in a copying machine, which lies in a specific position counted from the uppermost lying one, and by judging the leading edge of this specific sheet with a transport sensor by means of the counted value by a timer until said edge is sensed by a post-sensing identification sensor. CONSTITUTION:If a transport sensor S1 senses the leading edge of a specific one of the sheets loaded and is turned on, a timer 14 is reset to commence counting, and when the counted value attains a value corresponding to the reference time, the output of the identification sensor S2 is read and entered at this timing. It is judged that sheet treatment is carried out in the intended processes and order and that the transport speed is normal, if the identification sensor S2 senses the hole 7 at this timing. If on the other hand this check timing does not give sensing of the hole 7 by S2, it is judged that either double feed has occurred or that the transport is carried out at an abnormal speed, and an error signal will be emitted. Eventual interruption of sheet transport does not influence ill, because an inclint of the timer 14 is stopped at the same time as the transport clutch signal 9 is turned off. Thus accurate sensing is assured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a paper conveyance detection device in a copying machine or the like.

In particular, the paper conveyance detection device 7t,'
This is related to the improvement of e.

In general, delivery slips and honorable mention slips used in shops, department stores, etc. are made up of 5 to 7 sheets per set, with the following information: There are often

The original document containing the product name, customer, address, etc., is 141 mm thick. When making copies, the documents are fed into the paper transport path inside the copying machine.
In this case, if the e-sho is rolled out, not only will the 1 set be missing, but the 442-send I11μ order of the slip will be out of order, resulting in a discrepancy in the desired copy content, resulting in significant inconvenience. It was something that caused a combination.

Conventionally, there have been many M (feeding and detection devices l''i1? 3.
4. However, the reliability of V.11 for extremely thin paper, or extremely high or low transparency is not fully satisfactory.

The present invention removes 1.7 Ntk special means such as marks, holes, notches, etc. of a specific number of copies [] of a set of copy paper, and checks whether the copy paper is being fed according to the regular conveyance order. The purpose of this is to provide a paper IJIλ feed detection device 11' that accurately detects paper IJIλ feeding at 1° 1° and 1° 1', 1', and 1'.

An embodiment of the present invention will be described below based on the drawings.

2'' Figure 1 is an explanatory diagram showing the paper conveyance route for Kunisha bales.

In the figure, 1 is a paper feed tray containing copy paper, 2 is a paper feed roller, 3 is an IN/N feed roller, and 4 is a registration roller. The arrow indicated by 5 indicates the paper conveyance point b'i, and the paper advances along this paper conveyance path 5 and passes through the roller 117 drum 6.
So 1. , iz are transferred. A conveyance sensor 81, which will be described later, and a 1-separation sensor St'fj are provided between the conveyance roller 3 and the registration roller 4. This Seven-Lead 8182 indicated by the mark is a known paper sensor.

t, Figure 12 shows the above-mentioned 4-shield sending sensor S, identification sensor S,
It is an explanatory diagram showing the position 1i-:j of the fixed paper P.

lil of the specific paper P: The alternative means consists of holes 7 in this case. (L7 is constant in the y direction, but in the Place 11'7 is designated depending on which of these corresponds.

Then, at this predetermined block position, it is determined whether the hole 7 is detected or not.Therefore, there is no problem even if a hole for other purposes is formed at a location other than that.

Note that the direction of the arrow indicates the direction in which the copy paper is fed.

Copy paper is fed exactly one time in the direction of the arrow according to the processing order, but this specific paper P is fed at a predetermined time by this (feeding sensor S,...
i+l″] (Another sensor reaches right position 1;:t.

The sent sensor S+ and the identification sensor S are arranged perpendicular to the sending direction, and are arranged parallel to FQy.

On the other hand, since the +iif<separate sensor on the right side must detect the hole 7 as described above, an extension line -hK of this hole 7 is provided in the X-axis direction.

Then, when the conveyance sensor S detects the leading edge of the specific paper P,
The timer is now counting. Under normal conveyance conditions, this hole 7 is the identification sensor S! The time it takes to reach the reference 11,1 is counted as the reference 11,1 interval, and is stored in a storage unit to be described later. The output of the identification sensor S is checked at this reference time, and if the hole 7 is detected, it means that the conveyance is being carried out to the royal palace, and conversely, if the hole 7 is not detected, the conveyance is abnormal. In this case, if the identification sensor S2 is a transmissive type, it will detect that the output signal changes from low level to high level when detecting -JL7, and conversely, if it is a reflective type, it will detect the change in the output signal from low level to high level.
'Jr, the hole 7 is detected by the output change from high level to low level. Here, the timer is configured to hold a count value when the conveyance of the specific paper P is interrupted by the registration roller 4, and to add to this count value when the conveyance starts again. In this way, conveyance abnormality can be detected regardless of conveyance interruption. FIG. 3 is a block diagram of a detection circuit according to the present invention.

In the figure, 8 ("i control switch is used to turn on, transport sensor S3, 1 separation sensor S2, transport latch signal 9
with output of I10 baud) C)) through 10 IJ
(Central control persistent'') Information is input to 11. 12 goes to ㇠〇 4. 13 goes to 几AM and K Cl'
Connected to U11 by data bus and address bus.
No. 1.5 has been set. 14 is a timer external to the CPU 11; 15 is an error signal output from the board 10; and 1ii is a Q transmission abnormality detection output.

Control switches 8 are arranged in processing order 1
The number of copy sheets in a set, the number of sheets of specific paper P, the distance from the leading edge of the specific paper to hole 7 are normal [ij The above-mentioned reference time ((also known as the position information of L7) with waiting time) is calculated in binary form. This signal is sent to the CPU 11 as a signal.

In this), :,Q lx,system+1・) configuration,
After turning on the power, select each of the above 1i from the control switch 8.
1i (I took the final report ii)'t C P, U 1
1 is waiting for the (71 report) from the conveyance sensor Sl. This request sensor S outputs a detection signal even when it detects the leading edge of not only the fixed paper P but also other copy papers. As mentioned above, since the specific number of sheets of paper P is memorized by itself, the output of the conveyance sensor S1 can be taken in by detecting the leading edge of the copy paper of this sheet.

When the conveyance sensor S1 detects the leading edge of the specific paper P and turns on, the timer 14 is reset and starts counting.Thus, this count value corresponds to the reference time (1 m). When 1 is reached, the output of the crystal II separate sensor S can be read at this timing.

If the identification sensor S detects the hole 7 at this timing (as mentioned above, the detection output of this station is high level if it is a transmission type, and low level if it is a reflective type).
It is determined that the processing order of the copy paper is correct and the conveyance speed is at the royal speed.

If the identification sensor S does not detect hole 7 at this check timing, it means that separate feeding is occurring, or that there is an abnormality in the conveyance speed even if feeding is not occurring. , an error signal 15 is output. In addition, even if transport is temporarily interrupted to synchronize the paper and paper, the transport latch will not be activated.
At the same time as the timer 14 is turned off, incrementing of the timer 14 is also stopped. Therefore, this is a timing chart showing the operation of conveyance.

1111.11・] What is the second far-reaching force in P1?
1iii Conte 1') Resinoch 8 vc j near,,) 1) iJ, '-Ji ノ each 4': I ノ'll
'+' Yk O) Kotote'J3+ le. 42 S
'l'I+;1' 2 K: +6ke" + ,:
'l' 7 N5.111 Number of copies of fixed paper P λ
1℃ was (3・1j ;,;B to 1 installation sensor Sl
This is the ON output of 4. This output occurs and 5TJI]
The transport latch is turned on at P3, and as mentioned above, S
Timer 14 counts 71 times + IJ with T I bow P4
I will do it. Then, at 5T14P5, a check is made for the conveyance abnormality, that is, a judgment is made as to whether or not the hole 7 was detected at the reference time timing stated in =iJ.
If there is an error in the 1 installation; D)h, an error signal 14 will be output at S'I゛1 bow P6.

As described below, the present invention detects the conveyance state of a set of Aft; By detecting the step, it is determined whether it is correct or not, and,
Special>JZ Since we have made it possible to detect even the identifier level (1″4′) in K&, even if this '
Even if similar holes and marks are found on l'f regular paper, it would be impossible to distinguish between them.
Ru.

414 The simple i;) 1, Akira 2ix 11 The paper (1j) is an explanatory diagram showing the λ feed path, λ゛ (52 is an explanatory diagram showing the sensor arrangement according to the present invention , FIG. 3 is a system block diagram according to the present invention, and fl'44 +xl is a flowchart of the same operation.

7...61 holes by different means, P...
・Specified paper, mortar...j, j) Feed sensor, S2...
...Identification sensor.

245- Figure 1 Figure 2 ~Ryo F-Shimotei

Claims (1)

[Claims] Process 1b4 At least two or more cards arranged in order are 1
One of the sets of paper sheets 1 is classified into a specific paper equipped with an identification means, and an abnormality in the processing order is detected by detecting the identification means of this specific paper with a sensor. A timer is provided to measure the conveyance time υl from the leading edge of the paper sheet with the number of sheets, and this timer is used to hold the measured value when the conveyance of the paper sheet is interrupted, and when the conveyance of the paper sheet starts from 4+S. The presence or absence of JV feed abnormality can be detected by determining the time from the tip of class 19 to the detection of the identification means, which is calculated by adding it to the measured value (1q is completed, and this timer is used to detect the paper). paper conveyance detection device u
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