JP3824820B2 - Paper feeding method, paper feeding device and facsimile machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper feeding method, an apparatus, and a facsimile machine, and more particularly, to an improvement in paper feeding technology for paper wound in a roll (referred to as roll paper).
[0002]
[Prior art]
2. Description of the Related Art A paper feeding device using roll paper is widely used as a paper feeding device that supplies paper to an image forming apparatus such as a copying machine, a printer, or a facsimile machine. In general, when feeding the roll paper, a paper feed means (generally a unit type) that supports the roll paper rotatably, feeds the paper from the roll paper, conveys it, cuts it to a predetermined length, and supplies it to various image forming apparatuses. Are often used). When starting to supply roll paper, that is, setting the roll paper, set the roll paper in the paper feed unit, guide the leading edge of the paper to a predetermined pickup roller, and set up the paper. Pulling out, cutting off the leading edge with a cutter, leading the leading edge of the paper to a standby position (this process is called a paper cycle). Thereafter, if there is a request for paper from the image forming apparatus, based on this signal, the paper feeding means feeds the paper from the roll paper by the required length, cuts it at the required length, and sends it to the various image forming apparatuses. Include.
[0003]
However, the occurrence of a paper jam, that is, the occurrence of a jam during paper supply is inevitable, and various jam detection techniques have been proposed. In general, the conveyance amount or movement amount of a sheet is detected, and if this conveyance amount and conveyance length are longer than the required length, it is determined that a jam has occurred. In this determination, the detection length is determined by comparing the transport length, in other words, the detection length with a reference length obtained by adding a predetermined allowable surplus length to the required length in consideration of the error of the apparatus. If it is larger than the length, it is determined and detected as a jam.
[0004]
Then, once a jam occurs, the apparatus is stopped, and the roll paper setting and cueing operation, that is, the paper cycle is performed again. However, in this paper cycle, the position of the person varies because the person sets the leading edge of the paper. As a result, the drawer length becomes larger than the set value, and it is misidentified as a jam when no jam actually occurs. was there. For this reason, it was necessary to precisely position the paper edge during the paper cycle.
[0005]
On the other hand, when roll paper is used and the end of the paper is approached, the paper end is detected and the paper is replaced. However, at the end of the paper, in order to eliminate troubles during the subsequent roll paper replacement, It may be desirable to cut longer than the actual required length for the purpose of removing the terminal ends. However, this is also mistaken for a jam.
[0006]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and is a paper feeding method, a paper feeding device, and a facsimile machine that facilitates processing during a paper cycle of roll paper and also facilitates processing during a paper end to prevent trouble. Providing equipment.
[0007]
[Means for Solving the Problems]
The method of the present invention is a paper feeding method in which a roll paper is fed out, cut to a required length and supplied to an image forming unit while jam detection and paper end detection are performed. In this case, and / or when detecting the paper end, the allowable surplus length used for the determination at the time of detecting the jam is made longer than usual. As a result, even if the roll tip setting is slightly rough during the paper cycle, and even if the paper is pulled out a little longer at the end of the paper, there will be no misidentification of the jam. In this case, it is possible to increase the detection accuracy of jam.
[0008]
The apparatus of the present invention includes a paper feeding unit that feeds a roll paper, cuts and supplies the paper to a required length, a paper length detection unit that detects the length of the cut supply paper, and a difference between the required length and the detected length. In a paper feeding device having a control device that judges that a jam occurs when the difference in length is greater than the allowable surplus length, and / or during a paper cycle during paper replacement or jam processing, and / or In the paper end detection, a control device for setting the allowable surplus length large is provided. This makes it easy to work with a simple device, even if the roll tip setting is slightly rough during the paper cycle, and even if the paper is pulled out a little longer at the end of the paper, there will be no misidentification of the jam. It is possible to increase the accuracy of jam detection during normal paper feeding.
[0009]
Since the facsimile apparatus of the present invention includes the sheet feeder according to the present invention, the processing work load associated with sheet feeding can be reduced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 (a) is a schematic sectional side view of one embodiment of a facsimile apparatus according to the present invention, FIG. 1 (b) is an explanatory diagram of the control system, and FIG. FIG. 2 (b) shows a flowchart of control at the time of paper end, and FIG. 3 is a simplified schematic diagram of an example of a roll paper feeding unit.
[0011]
In FIG. 1A, a roll paper feeding unit 3 as a paper feeding means is installed below the main body 2 at the top of the facsimile apparatus 1, and a roll paper R is rotatably supported in the paper feeding unit 3. The paper fed from the roll paper R along the conveyance path G formed in the paper feed unit 3 and the facsimile main body 2 and cut to the required length is supplied to the image forming unit of the facsimile apparatus 1. A paper detection sensor 4 detects the length of the supplied paper.
[0012]
As shown in FIG. 3, the paper feed unit 3 absorbs the slack of the paper from the roll paper R, a decurler 31 for correcting winding, a pickup roller 32, a paper end sensor 33, a cutter 34, a feed roller 35, and the paper. For this purpose, it is supplied via a guide plate 36, a relay roller 37, and a conveying roller 38 that are opened and closed as necessary. Sensors 37a and 38a for detecting the presence or absence of paper are installed in the vicinity of the relay roller 37 and the transport roller 38 to generate detection signals.
[0013]
As shown in the system configuration of FIG. 1B, these rollers, cutters, etc., the roll paper feed unit 3, paper detection sensor 4 and facsimile control device 2A constitute a control system, and the control device 2A In response to the signal of the required length of the paper in the image forming unit, the roll paper R is fed and cut, and the required length of paper is transported and supplied, or the paper length detected by the paper detection sensor 4 The difference with the required length is calculated, and the difference in length is compared with a separately set allowable surplus length. If this difference is larger than the allowable surplus length, that is, the paper length is longer than the required length. When the jam is detected for a longer time, the roll paper R is consumed, and when the paper end is detected by the paper end sensor 33, a paper end detection signal is issued, and a necessary action is taken. Depending on the operation of Akushimiri apparatus 1 controls the operation of the sheet feeding unit 3.
[0014]
As such a configuration of the facsimile and paper feeding unit, or detection of paper length, detection of jam, paper end detection or control system, a conventionally known one can be used, and detailed description thereof will be omitted.
[0015]
In the paper feeding method and apparatus according to the present invention, as shown in the flowchart of FIG. 2A, first, the paper jam determination condition is changed when the paper cycle is performed, that is, the above-described allowable surplus length. This size varies depending on the configuration of the conveyance system of the paper feeding unit 3 and the contents of the roll paper cueing operation. However, if the allowable surplus length for normal operation is 20 mm, for example 60 mm is allowed. The surplus length is about 40mm. When the paper cycle is completed, the normal conditions are restored.
[0016]
Next, as shown in the flowchart of FIG. 2B, the paper jam determination condition is similarly relaxed even when the end of the roll paper R is detected, that is, at the paper end. When a new roll paper R is set, the normal conditions are restored.
[0017]
As described above, in the present invention, the judgment conditions for jamming are eased during the paper cycle, so even if the end of the roll paper is set a little longer, it will not be judged jammed. There is no need to use it, and work becomes easier.
[0018]
Similarly, since the jam determination condition is eased at the time of paper end, it is possible to feed an extra sheet by a necessary length at the time of paper end and carry out the paper end without fear of misidentification of the paper. This eliminates the need to immediately operate the cutter 34 when the paper end is detected. At the time of the paper end as shown in FIG. 3, there is no sheet of width A remaining between the paper end sensor 34 and the cutter 34, and each trouble. Can be eliminated.
[0019]
Depending on the configuration and control method of the paper feed unit, there may be cases where it is sufficient to relax the jam determination condition only during the paper cycle, and conversely, it may be possible to relax the jam determination condition only during the paper end. Yes, it is not always necessary to relax the jam conditions both at the paper cycle and at the paper end. Each may be relaxed according to the characteristics of the paper feeding unit and paper feeding means.
[0020]
In the above-described embodiment, the sheet detection sensor 4 is arranged at the facsimile entrance for detecting the sheet length. As a result, the length of the sheet can be measured immediately before the image formation, but in some cases, it can be detected by the sensor 37a or the sensor 38a provided in the transport system. The allowable width at the time of jam determination is described as an allowable surplus length in terms of phenomenon. However, the determination signal in the control device can be expressed by converting the physical length into time, the number of pulses, etc., so it is not necessarily limited to the one that directly measures and evaluates the length. Should be understood as meaning an allowable surplus length.
[0021]
【The invention's effect】
The method of the present invention makes the allowable surplus length used for the judgment at the time of jam detection longer than the normal time at the time of paper cycle at the time of paper replacement or jam processing and / or paper end detection. Even if the roll tip setting is slightly rough during the paper cycle, or even if the paper is pulled out a little longer at the end of the paper, there will be no misidentification of the jam. Jam detection accuracy can be increased.
[0022]
The apparatus of the present invention includes a paper feeding unit that feeds a roll paper, cuts and supplies the paper to a required length, a paper length detection unit that detects the length of the cut supply paper, and a difference between the required length and the detected length. In a paper feeding device having a control device that determines that a jam occurs when the difference in length is greater than the allowable surplus length, and / or during a paper cycle during paper replacement or jam processing, and / or When detecting the paper end, it is equipped with a control device for setting the allowable surplus length to a large value, so even if the setting of the roll tip at the paper cycle is somewhat rough, the paper end Even if the paper is pulled out a little longer, there is no misidentification of the jam, which makes the operation easier, and conversely, the accuracy of jam detection can be increased during normal paper feeding.
[0023]
Since the facsimile apparatus of the present invention includes the sheet feeder according to the present invention, the processing work load associated with sheet feeding can be reduced.
[Brief description of the drawings]
FIG. 1 (a) is a schematic sectional side view of one embodiment of a facsimile apparatus according to the present invention, and FIG. 1 (b) is an explanatory view of the control system.
2A is a flowchart of control during a paper cycle, and FIG. 2B is a flowchart of control during a paper end.
FIG. 3 is a simplified schematic diagram of an example of a roll paper feeding unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Facsimile apparatus 2 Facsimile main body 2A Control apparatus 3 Roll feed unit 4 Paper detection sensor R Roll paper G Conveyance path

Claims (3)

In a paper feeding method in which roll paper is fed out, cut to a required length and supplied to the image forming unit while performing jam detection and paper end detection, during paper replacement at the time of paper replacement or jam processing, and / or Alternatively, the paper feed method is characterized in that, at the time of paper end detection, an allowable surplus length used for determination at the time of jam detection is made longer than normal. A paper feeding unit that feeds the roll paper and cuts and supplies it to the required length, a paper length detection unit that detects the length of the cut supply paper, and a difference between the required length and the detected length as an allowable surplus length. In comparison, in a paper feeding device having a control device that judges that a jam occurs when the difference in length is larger than an allowable surplus length, paper end at the time of paper replacement or jam processing and / or paper end detection In this case, a paper feeding device comprising a control device for setting the allowable surplus length large. A facsimile apparatus comprising the paper feeding device according to claim 2.

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