JPS61248838A - Paper feeding state trouble display device for copying machine - Google Patents

Abstract

PURPOSE:To display a running state of paper and a paper jam happening position, by lighting each display element selectively with output of a paper detector being set up in each position of these display elements set up simulatively and an acting state of a copying machine. CONSTITUTION:An indicator 2 being set up in simulation of a conveying route of paper, inclusive of a pair of display elements D1, D1' and so on, is provided with sensors S1-Sn in response to these elements. When a machine operates normally, the sensor S1 detects conveyance of the paper, and a detection pulse is compared with a reference signal out of a delay distributor 4 at a comparator C1, and when both can be accorded with congruous timing, the display element D1 is lighted. When the paper is jammed, subsequent sensors will not detect the paper, and supposing that the paper is jammed just short of the sensor S2, the display element D2 for a normal acting display will not be lighted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying machine, and more particularly to an abnormality display device that detects and displays an abnormality in the paper feeding state of a copying machine.

[Conventional technology]

In a copying machine, transporting copy paper (hereinafter referred to as paper) is an important operation that is essential for the progress of copying, such as taking out paper from the paper feed tray, transferring, fixing, and ejecting it. In order to handle such abnormalities, which occasionally cause paper jams, it is necessary to immediately detect such abnormalities and display a message to that effect.

FIG. 5 shows a conventional example of detecting and displaying such an abnormality (Japanese Patent Application No. 59-034000). In Figure 5,
Reference numeral 1 is a white display diagram of the machine, which shows the outline of the inside of the machine by, for example, printing. Machine white display In FIG. 1, a copy paper conveyance path 52 is shown by a broken line, and a plurality of indicators 5 including indicator lights, LEDs, etc. are installed at locations where paper jams are likely to occur.
3 is provided. The indicators include, for example, the paper feeding section 11, the lower part of the photosensitive drum (transfer section) 12, and the paper reversing section 1.
3, double-sided tray section 14, lower tray section 15, upper tray section 16, double-sided tray inlet section 17, outlet section 18, sorter 1
9, sorting turbine 20, etc.

Furthermore, a paper jam detection sensor is installed inside the actual machine. That is, a paper jam detection sensor is provided at a location inside the actual machine corresponding to the position where the display 53 is installed, and when the detection sensor detects a paper jam, the display at the location corresponding to the detection sensor is lit. , displays the occurrence of a paper jam and the location of the paper jam.

This allows the operator to easily know the occurrence of a paper jam and its location.

[Problem that the invention seeks to solve]

However, with the conventional methods described above, the position of the paper is known only after a paper jam occurs, and the display of the paper jam position is limited to typical locations, making it difficult to see if the paper is running properly. There are problems such as the paper jam location display not matching the actual situation.

[Means for solving problems]

In order to solve the above problems, the present invention includes: a display element arranged in a simulated manner according to the paper path inside the copying machine; a paper detector arranged inside the machine corresponding to the position of the display element; It is equipped with a control section that selectively lights up a display element depending on the output of the paper detector and the operating status of the copying machine, so that the running status of paper can be displayed when the copying machine is in use, and the exact location of a paper jam can be determined. It is characterized by being able to be displayed.

〔Example〕

The present invention will be described in detail below with reference to FIGS. 1, 2, 3, and 4. FIG. 1 shows a first embodiment of the invention, FIG. 2 shows a second embodiment, FIG. 3 shows a control device for a display device, and FIG. 4 shows a control device for a display device. FIG. 3 is an explanatory diagram for explaining the operation.

In Figure 1, reference numeral 1 is an internal display diagram of the machine, which is an outline of the interior of the copying machine printed on a transparent board, etc. 2 is placed. The display device 2 includes, for example, a pair of display elements Dz, D+' (hereinafter referred to as a display element pair) as shown in FIG. 3, and a large number of display element pairs D2, D2' to D
n −, D n ′. Display element pair D
s and Dt' are preferably constituted by LEDs (light emitting diodes), but of course other display bodies may be used. Here, the display element pair is, for example, a green LED Di 5D2---
-Dn and red L E D D s, ', D
2' to Dn'. Each display element pair Dt
, Dt' to Dn, sensor 8 corresponding to Dn'
1 to Sn are provided. This sensor S+-3n is placed in the paper conveyance path of the actual copying machine, and detects whether or not the paper is being conveyed normally, as will be explained later. Note that the sensors 81 to Sn are connected to the display element pair D t % D s
'~D n sDn' are placed corresponding to the actual route being displayed.

Comparators Cs-Cn are provided corresponding to each sensor 81-Sn. Each comparator 01 to Cn includes a reference signal generator 3
A signal from the signal is supplied via a delay distributor 4.

The reference signal generator 3 generates a signal selected depending on the running paper. That is, as shown in FIG. 4(a), a signal a having a pulse width T1 and a pulse interval t1 is generated. Here, 'r and tt are defined as follows.

T - Speed of each paper + α (10 slips when the paper crosses the sensor) tl - Subtract α from the feeding interval between sheets.

The delay distributor 4 receives the signal from the reference signal generator 3, delays it by a predetermined amount, and supplies it to the comparators 01 to Cn provided corresponding to the sensors 81 to Sn.

The amount of delay is determined depending on the mounting position of each sensor. That is, the amount of delay is defined as the time required for the paper to reach the detection position of each of the sensors 81 to Sn when it is fed under normal conditions. Further, it is assumed that the reference signal from the reference signal generator 3 is generated in synchronization with the start of copying.

Now, assuming that the machine is operating normally, the first sensor S1 detects that paper is being conveyed, generates a detection pulse (b) as shown in Figure 4 (b), and outputs the is set to "1". At this time, the reference signal (a) exactly synchronized with the detection pulse is input from the delay distributor 4 to the comparator C1. The comparator C1 compares the detection pulse and the reference signal, and if the timing of both coincides, the comparator C+ ratio output is set to 1. Therefore, ant gate A
ND1 is turned on, lighting up display element D1.

Next, the paper comes to the detection position of sensor S2, but at this time as well, sensor S2 outputs a detection pulse and sets the output to "1". Also, at this time, comparator C2 receives a reference signal delayed by a predetermined time in synchronization with the detection pulse, so the output of comparator C2 also becomes "1", and AND 2 turns on, so the display Element D2 is lit. Needless to say, each display element is turned off when the paper passes and the detection signal from the sensor disappears.

When the paper is being transported normally in this manner, the display elements DI, D2.-=Dn are lit one after another, and are turned off when the paper passes. Therefore, the display elements Dl to Dn can indicate the passage of paper by blinking. If the display elements D1 to Dn are set to blue or green, normal operation can be displayed intuitively.

However, once the paper is jammed, the sensor no longer detects the paper. For example, assuming that paper is jammed before sensor S2, the signal from the reference signal generator reaches comparator C2, but no detection pulse is output from sensor S2, so AND2 remains off. The display element D2, which indicates that the operation is normal, does not light up.

However, since the outputs of the sensor S2 and the comparator C2 are supplied to the game AND2' through the inverters, AND2' is turned on, and the display element D2' indicating the failure state lights up.

If this continues, all failure display elements D after sensor S3
3' to Dn' will light up, so in order to light up only the fault display element corresponding to the fault point, use a priority circuit or provide latch circuits R1 to Rn, and use a gate) AND 1', AND 2'---A
It is also possible to input the output of ND n ', detect the sensor S2 that first detected the paper jam state, and turn on only the display element D2' there.

FIG. 2 shows another embodiment, in which the indicator lights at the time of failure are numbered 11 to 20 as in the conventional example. That is, the indicator 2 that indicates the running state of the paper is composed of a large number of display elements such as LEDs as in the first embodiment, and the display elements 23 that are turned on in the event of a failure are provided only at locations where paper jams are likely to occur. It is something. The location for providing the display element that lights up in the event of a failure is the same as in the conventional example (for example, the paper feeding section 11
, a photosensitive drum lower part 12, a paper reversing section 13, a double-sided tray section 14, a lower tray section 15, an upper tray section 16, a double-sided tray inlet section 17, an outlet section 18, a sorter 19, a sorting turbine 20, and the like.

In the above description, an example in which a light-emitting display element is used as a display element has been described, but it is of course possible to use other display elements.

〔Effect of the invention〕

As described above, according to the present invention, when the paper is moving normally, the condition can be seen at a glance, and when a paper jam occurs, the occurrence of the paper jam and the location of the paper jam are immediately detected. I understand. Furthermore, it is easy to display the location h where a paper jam occurs more accurately if necessary, and the user can respond to the paper jam accurately and quickly.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a first embodiment of this invention, FIG. 2 is a diagram showing a second embodiment of this invention, FIG. 3 is a diagram showing a control device for a display device, and FIG. 4 is a diagram showing a control device. FIG. 5 is a diagram showing an example of a conventional display device. 1.--Mechanical circle display diagram, 2.-Display device, 3.-
・Reference signal generator, 4-delay distributor. Patent Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Akira Yamatani Construction Figure 1 Figure 2 Figure 3 (A) 〃 (B) Figure 4

Claims (1)

[Claims] a display device including a display element indicating a paper running state and a display element indicating a paper jam state, which are arranged in a simulated manner according to the paper path inside the copying machine; and a display device arranged inside the copying machine corresponding to the position of the display device. It is equipped with a paper detector and a control unit that selectively controls display elements based on the output of the paper detector and the operating status of the copying machine, so that when the copying machine is in use, it is possible to display the running status of the paper and also to prevent paper jams. A paper feeding status abnormality display device for a copying machine, characterized in that a display element corresponding to a location where a paper jam occurs is sometimes controlled to display.