JPH03143068A - Recording sheet control method - Google Patents

Abstract

PURPOSE:To prevent print recording to a position on paper where curled paper takes place by feeding a part of nonuse recording sheet in press contact at least with a recording head toward paper discharge side prior to the start of recording. CONSTITUTION:A recording sheet roll P is moved step by step while being pressed onto a thermal head with a platen roller 3 and picture recording is implemented sequentially, and after the end of recording of one paper, the recording sheet P after recording is moved to a cutter 4 by the platen roller 3 and cut off at the recording end position. When some time elapses in the standby state of a succeeding reception, since a curled paper sheet 5 takes place on the recording sheet P at a position where the paper is pressed between the thermal head 2 and the platen roller 3, the curled paper 5 is preferably fed to the position of the cutter 4, the part is cut off and the tip of the recording sheet P not in use is returned to the position beneath the thermal head 2 and the paper is recorded. Thus, no curled paper takes place to the printed part of the recording sheet P of a facsimile equipment and ease of arrangement is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording sheet control method for controlling the transport of recording sheets in a facsimile machine or the like.

(Prior art) Conventionally, as shown in Japanese Utility Model Publication No. 64-5417, after recording on a recording sheet and cutting it with a cutter, the unused side of the recording sheet is pulled back and the leading end is inserted into the platen of the recording head. Leave it on standby with a certain length left against the roller,
A facsimile recording sheet control method has been proposed in which, at the start of recording, the recording sheet that is waiting with the above-mentioned fixed length left is bent back, its leading edge is aligned directly below the platen roller of the recording head, and then recording is started. has been done.

(Problem to be Solved by the Invention) In this conventional technique, the unused side of the recording sheet cut by a cutter is pulled back and the leading end is left on standby with a certain length left with respect to the platen roller of the recording head. After that, before starting recording, I tried to align the platen roller almost directly below it, so the recording sheet had some curls (
(See Figure 3(a)). For this reason, it is difficult to organize the recording sheets, and there are also problems such as the recorded contents in that part being difficult to read, or the recording sheets being scattered by a slight breeze. In the case of facsimile, since it is not known when the next reception will occur and the waiting time is considered to be long enough, the above-mentioned problem appears particularly in this case.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording sheet control method that prevents paper curls from forming on the printed portion of a facsimile recording sheet and allows easy organization of the recording sheet.

[Means to solve the problem]

The present invention provides a recording sheet control method in which a recording sheet on which recording has been performed between a recording head and a platen roller is sent out to the paper ejection side. The contact portion is sent out to the paper discharge side.

Further, a sensor for detecting the occurrence of paper curls is provided at a portion that contacts the recording head, and when the sensor detects paper curls, at least one of the unused recording sheets is connected to the recording head prior to the start of recording. The abutting portion of the paper is sent out to the paper ejection side. Alternatively, a timer is provided to measure the elapsed time from the end of recording, and when the timer measures the elapsed time, the timer measures at least the portion of the unused recording sheet that is in contact with the recording head before starting recording. The paper may be sent out to the paper discharge side.

Preferably, prior to the start of recording, at least the abutting portion of the recording sheet fed out may be fed out to a cutter and cut, and then the unused side of the recording sheet may be pulled back to the recording head.

[Effect]

According to the present invention, prior to the start of recording, at least the portion of the unused recording sheet that contacts the recording head is sent out to the paper ejection side.

According to a second aspect of the present invention, a sensor for detecting the presence or absence of paper curls on a recording sheet detects paper curls, and prior to the start of recording, at least the portion of the unused recording sheet that contacts the recording head is on the paper ejection side. sent to.

According to claim 3, when a predetermined period of time has elapsed, it is assumed that paper curl has occurred, and at least the portion of the unused recording sheet that contacts the recording head is sent out to the paper ejection side prior to the start of recording.

According to the fourth aspect, after the contact portion of the recording sheet is fed to the cutter and cut, the unused side of the recording sheet is pulled back to the recording head.

〔Example〕

FIG. 6 is an overall configuration diagram of a facsimile machine to which the recording sheet control method according to the present invention is applied.

Reference numeral 31 denotes the main body of the facsimile machine, and inside the main body 31 there is a recording sheet P wound into a roll, a thermal head 2 for recording received signals on the recording sheet P, and a recording head 2 that functions as a receiving section. A platen roller 3 that presses through the sheet P and sends the recording sheet P downstream; a cutter 4 consisting of an upper blade and a lower blade that cuts the recording sheet P at a predetermined position; and a record cut by the cutter 4. A discharge roller 33 for discharging the sheet P onto a paper discharge tray 32 is provided. 34 is a paper receiver for cut paper.

Note that 19 is a control unit (CPU) that controls the entire operating mechanism of the facsimile.

In addition, the document insertion slot 3 functions as a transmitter.
5, paper feed roller 36, conveyance roller 37, discharge roller 38
and a document ejection tray 39 are provided. Reference numeral 40 denotes a contact glass provided at a suitable location on the conveyance path through which the original is conveyed, so that light from a light source 41 is reflected by the original passing through the contact glass 40. The reflected light passes through the mirrors 42a, 42b, 42G and the lens 43.
After the light is received by the CD 44, it is converted into an electrical signal.

FIG. 2 is a schematic diagram showing the mechanical part of the facsimile recording section. The rolled recording sheet P is placed on the platen roller 3.
While being pressed by the thermal head 2, images are sequentially recorded by moving step by step.

After the -inspection recording is completed, the recorded recording sheet P is transferred to the cutter 4 by the platen roller 3 and cut at the recording end position. When image recording for the number of received images is completed in this way, the apparatus enters a standby state for the next reception.

After a certain amount of time has passed in this standby state, paper curls 5 occur in the recording sheet P at the portions pressed by the thermal head 2 and the platen roller 3, as shown in FIG. 3(a). Therefore, as will be described later, the part with the paper curl 5 is preferably fed to the position of the cutter 4, and after cutting this part (see FIG. 3(b)), the leading edge of the unused recording sheet P is Recording is performed by returning the head to a position directly below the head 2.

FIG. 1 is a circuit block diagram for explaining a method for separating recording sheets. 11, when receiving a call signal, the main body 2
1 is a network control unit that connects the telephone line; 12 is a modulation/demodulation unit that modulates the received image signal to 11 and modulates the transmitted image signal; 19 is the network control unit 11 that records the image;
This control section is connected to the modulation/demodulation section 12, the recording section 13, and the paper texture detection section 14 that detects the occurrence of paper texture on the recording sheet.

The recording section 13 includes a motor drive section 16 that drives the pulse motor 15, a recording control section 17 that performs a printing operation on the thermal head 2, and a cutter drive section 18 that drives the cutter 4. The motor drive unit 16 is a control unit 19
The pulse motor 15 is rotated based on a rotation pattern signal output from the pulse motor 15. The pulse motor 15 rotates the platen roller 3 in a predetermined direction according to this rotation pattern signal. The recording control section 17 sends print block data outputted from the control section 19 to the thermal head 2 in synchronization with the rotation of the pulse motor 15 to control printing by the thermal head. The cutter driving section 18 receives a cutting signal from the control section 19, drives the cutter 4, and cuts the recording sheet. Reference numeral 14 denotes a filter paper texture detection section, which is constituted by a reflection type sensor or a recording monitoring timer, which will be described later, and detects the paper texture of the recording sheet and outputs a signal indicating the occurrence of paper texture to the control section 19.

FIG. 4 is a schematic side view of the recording mechanism part showing the recording sheet in a standby state; FIG.
indicates a state where paper curls have occurred.

In addition, the same numbers are given to the same parts in the figure as in FIG. 2. In the figure, a recording sheet P is waiting while being pressed by a thermal head 2 and a platen roller 3, leaving a predetermined length. Reference numeral 20 denotes a reflection type sensor that is disposed approximately directly below the recording sheet that remains for the predetermined length, and that transmits light or sound waves toward the paper surface and receives reflected waves.

d indicates the amount of displacement caused by bending of the recording sheet due to the occurrence of paper curls. Assuming that the reflection level detected by the reflective sensor 20 in the state of Figure (a) is 11, and the reflection level detected by the reflective sensor 20 in the state of Figure (b) is L2, then The recording paper displacement amount changes from O to d. Then, the output level of the reflective sensor 20 changes from Ll to L2 in accordance with the above displacement amount. This output level L1
When the difference between 1 and 12 exceeds a certain value, a signal indicating that paper curl has occurred is output to the control section 19.

Specifically, the sensor output from the reflective sensor 20 is input to one input terminal of the comparator 21 shown in FIG. being done. If the sensor output is below the reference level L, a low level signal indicating that no paper curl has occurred is output to the control unit 19. When the sensor output exceeds the reference level, a high level signal indicating that paper curl has occurred is output to the control section 19.

FIG. 7 is a flowchart showing the operation of the llltll section.

First, when there is a request to start recording, a rotation pattern signal is sent to the motor drive section 16, and the motor 15 rotates by a predetermined amount to eject the portion where paper curls have occurred (step 81). When the paper textured portion is ejected, print data is sent to the recording control section 17, and the thermal head 2 prints on the recording sheet P, and the recording sheet is periodically conveyed (step 82). Then, it is determined whether there is a next page, and if there is a next page, the process returns to step S2 and the recording sheet P is recorded and transported. On the other hand, if there is no next page, the recording sheet is ejected for a predetermined number of meters and the operation ends. In this embodiment, the recording sheet is ejected without being cut by the cutter 4.

FIG. 8 is another flowchart showing the operation of the control section.

When the network control unit 11 detects a call signal indicating the recording amount tjf3 request, the control unit 19 connects this equipment to the telephone line (
Step 511). Next, a rotation pattern signal is sent to the motor drive section 16, and the pulse motor 15 is rotated by a certain amount to transport the inner curly portion of the unused recording sheet P to the cutter 4, where it is cut (step 512). and,
The control unit 19 sends a rotation pattern signal in the opposite direction to the motor drive unit 16, so that the pulse motor 15 rotates in the opposite direction by a predetermined amount, and the leading edge of the recording sheet is pulled back to the position where it comes into contact with the thermal head 2 (step 513). When the reception signal is sent in this state, the control unit 19 outputs a rotation pattern signal to the motor drive unit 16 and outputs print data to the recording control unit 17 to synchronize with the transfer of the recording sheet and move the thermal head 2. (Step 5)
14).

When one page is finished and the recording sheet P is transported to a predetermined position by the rotation of the pulse motor 15, the control section 19 outputs a cutting signal to the cutter drive section 18, and the page of the recording sheet P is cut at the predetermined position. Segmentation is performed (step 515). Next, the control unit 19 determines whether there is a next page (step 8).
16). If there is no next page (No in step 816),
The recording sheet P is then ejected (step 517).

When the ejection of the recording paper is completed, the pulse motor 15 reversely rotates by a certain amount to pull the recording paper back to a predetermined standby position (step S18).

Note that if there is a next page in step 816, steps 813 to S16 are repeatedly executed until the last page is detected.

FIG. 9 is another flowchart showing the operation of the control section. That is, in this embodiment, instead of being operated uniformly for each recording start request, it is operated only when paper curls occur.

When there is a request to start recording, the paper texture detection unit 14 first determines whether or not paper texture has occurred (step 52).
1). If no paper curl has occurred, a rotation pattern signal is sent to the motor drive unit 16, and the pulse motor 15 rotates to convey the recording sheet P, and prints on the recording sheet P in synchronization with this ( Step 523). −
When printing of the bill is completed, it is determined whether there is a next page (step 524). If there is no next page, the recording sheet P is directly ejected (step 825>; if there is a next page, the process returns to step S23. If paper curl has occurred in step 821, the pulse motor is 15 to discharge the ma-generating portion (step 522).From step S22 onwards, the same operations as in the flowchart shown in FIG. 7 described above are performed.

In addition, as the paper texture detection section 14, the above-mentioned reversible type sensor 2 is used.
0 or a recording monitoring timer 22 is used.

Yuko's recording monitoring timer consists of a timer, and when the recording of the last page on the recording sheet P is completed, the control unit 19
A reset signal is sent from the recording monitoring timer 22, and the recording monitoring timer 22 is reset. After this reset, the recording monitoring timer 22 measures time, and when a predetermined period of time has elapsed after the reset, it sends a signal indicating that paper curl has occurred to one control unit.

Note that this determination of the occurrence of paper curls can be similarly applied to the case of cutting with the cutter shown in FIG.

[Effects of the Invention] According to the present invention, at least the portion of the unused recording sheet that contacts the recording head is sent out to the paper ejection side before recording starts, so that it is possible to prevent printing from occurring in areas where paper curls occur. It can definitely be prevented.

Moreover, according to claim 2.3, since a paper curl occurrence detection means is provided, the occurrence of paper curl can be reliably detected, and it is possible to prevent paper curl from being involved in print recording.

Furthermore, according to the fourth aspect of the present invention, the paper is transported to the cutter where the paper curls occur and is cut before starting recording, and then the recording sheet is pulled back to the recording head, so that paper curls can be prevented and the paper can be easily sorted.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of a facsimile receiving section to which the recording sheet control method of the present invention is applied, FIG. 2 is a schematic diagram of the facsimile recording section to which the recording sheet control method of the present invention is applied, and FIG. This is a diagram showing the state of the recording sheet.
Figure 4 (a) shows a recording sheet with paper curls, FIG. 6 is a diagram showing a state in which the recording sheet has no paper curls, FIG. 6B is a diagram in which the recording sheet has paper curls, FIG. The figure is a block diagram of the facsimile according to the present invention, and FIGS. 7 to 9 are control charts by the control section. 2... Thermal head, 3... Platen roller, 4
. . . Cutter, 14 . Part, 2
0... Reflective sensor, 21... Comparator, 22...
Recording monitoring timer P...Recording sheet

Claims (1)

[Scope of Claims] 1. In a recording sheet control method in which a recording sheet on which recording has been performed between a recording head and a platen roller is sent out to the paper ejection side, at least recording is performed on an unused recording sheet prior to the start of recording. A method for controlling a recording sheet, characterized in that the part that contacts the head is sent out to the paper ejection side. 2. A sensor is provided at the abutting portion of the recording head to detect the presence or absence of paper curls in the recording sheet, and when the sensor detects paper curls, at least the recording of the unused recording sheet is performed prior to the start of recording. 2. The recording sheet control method according to claim 1, wherein a portion of the recording sheet that contacts the head is sent out to the sheet discharge side. 3. A timer is provided to measure the elapsed time from the end of recording, and when the timer measures a predetermined time, the timer measures at least the portion of the unused recording sheet that is in contact with the recording head before starting recording. 2. The recording sheet control method according to claim 1, wherein the recording sheet is fed to the paper discharge side. 4. In the recording sheet control method according to claim 1, 2 or 3, after the contact portion of the recording sheet fed out prior to the start of recording is fed to at least a cutter and cut,
Recording sheet control method in which the unused side of the recording sheet is pulled back to the recording head