JPS6137664A - Controller for machine having paper carry system - Google Patents

Abstract

PURPOSE:To comprehend the position apt to cause jamming accurately by storing the identification symbol preset with correspondence to the jammed position into nonvolatile memory for holding the content even upon interruption of power. CONSTITUTION:In each paper detector S1-S4 in paper carry path 11, the items of paper pass time and arriving time to next detector are provided. While regular time is set for respective item and upon exceeding over this setting under paper carrying, the identification number to be set with correspondence to the position on the paper carry path 11 is pre-stored in RAM (nonvolatile memory) 12. Upon stoppage of copy machine, CPU13 will read the stored identification number and read only memory (ROM)14 will indicate the identification number onto number display 16 thus to inform jamming to the operator.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention provides a method for handling paper jams in equipment having a paper conveyance system.
This invention relates to a control device that is arranged in such a way that it is possible to know the parts that cause the problem.

[Conventional technology]

Conventionally, when a paper jam occurs in a copying machine, a paper jam indicator lamp on the operator's wheel is turned on when the jam occurs. Even when you want to obtain information such as where in the conveyance path paper jams υ are likely to occur, or how often they occur,
It is difficult to accurately identify the location where paper jams occur.

If the location that causes the paper jam is inaccurate, it will be difficult to take prompt action.

[Problem that the invention seeks to solve]

The present invention is intended to solve the problem of not being able to accurately determine the location that causes the paper jam p.

[Means and effects for solving the problems] This invention has the following features:
For this reason, an identification symbol that is preset according to the location where the paper jam occurred is stored in a non-volatile memory that retains its memory even when the power is turned off, and is used to identify the location where the paper jam occurred. This allows for an accurate understanding of the

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention,
Further, FIG. 2 shows an example of a paper conveyance system in a copying machine to which the present invention can be applied.

In Figure 2, (1) is the copying machine body, (2) is the original (
3) There is an exposure lamp (4
), an optical system (
5) and a photoreceptor drum whose surface is irradiated with the reflected light (
6) is provided, as well as a paper storage tray (7).
) A paper transport path (11) is set so that the paper fed out by the feed roll (8) passes through the photosensitive drum (6) and the fixing device (9), and then reaches the copy receiver (10). Paper detectors provided along the paper transport path (111, for example, four paper detectors 81- in the illustrated example)
84 is a feed clutch (8) and a photosensitive drum (6)
approximately midway between the front and back of the photoreceptor drum (8) and the fuser (9).
), and as for these paper detectors 81 to S4, each of the paper detectors 81 to S4 installed in the paper transport path (11) determines the paper passage time and the time to the next detector as described above. An item called arrival time is provided, and an identification symbol, for example, a numerical identification number, is given in advance. The identification symbol is not limited to this, and may be letters, numbers, a combination of letters, etc.

Further, a specified time is set for each of the above items, and if the specified time is exceeded, the identification number is stored in the random access memory (RAM) f12) shown in FIG.

This RAM+121 stores the identification number once stored in the central processing unit (CPU) even when the power is turned off or on.
It is composed of a non-volatile memory that can retain its stored contents even when the power is turned off so that it can be read out by 131. Also, read-only memory (ROM)
f14+ uses the output from the detector group (15) consisting of each paper detector 5l-84, compares it with the above-mentioned specified time, stores it in gM (12), and detects when a paper jam occurs in the copying machine. When the CPU (13) stops, a control program is stored that causes the number display device (16) to display the above-mentioned identification number according to the location where the paper jam has occurred.
) executes this program based on the take ζ obtained from the detector group (15) during the process ζ in which the paper is transported along the aforementioned paper transport path (11). In FIG. 1, there is shown a position display device controlled by the CPU (13) (in this case, this may be an existing paper jam position display device).

In this way, according to the apparatus of the embodiment, the paper transport path (1
In each of the paper detectors 81 to S4 in 1), items are provided for paper passage time and arrival time to the next detector, and on the other hand, a specified time is set for each item, and if the time is exceeded when paper is conveyed. , an identification number set in advance according to the location of the paper transport path (11) is stored in the RAM (12),
It is also displayed when the copying machine is stopped. The identification number stored in the RAM (12) does not disappear even when the power is turned off. Therefore, by reading this number, you can accurately identify the location where the paper jam occurs, and you can identify the cause of the paper jam by identifying replacement parts, etc. Measures can be taken quickly.

〔Effect of the invention〕

As described above, the present invention makes it possible to use identification symbols to find out where paper jams are likely to occur in the paper transport path, and to accurately identify the locations that cause paper jams. This has the advantage that the cause can be quickly investigated and countermeasures can be taken, such as identifying parts to be replaced.

[Brief explanation of drawings]

FIG. 1 is a control block diagram showing one embodiment of the present invention, and FIG. 2 is a schematic diagram of the interior of the copying machine. [Code explanation]

Claims (1)

[Claims] In a device having a paper transport system, a non-volatile memory stores an identification symbol set in advance according to a location where a paper jam occurs; a display device for displaying the identification symbol;
A control device characterized by comprising: means for controlling to read out the identification symbol in order to know the location that causes a paper jam.