JPH02149062A - Roll paper discharging method - Google Patents

Abstract

PURPOSE:To eliminate the folding of a leading end part by once rotating only a platen roll in a reverse feeding direction after cutting, separating the last recording paper of one cycle and retreating the leading end part after the cutting of the roll paper from a cutting position. CONSTITUTION:When the recording paper printed by one page passes through a cutter 6 and a position to be cut is fed so as to face the cutter 6, a motor 17 is stopped and simultaneously rolls 5 and 7 are stopped. Then, a movable blade 20 is turned downward, the cutting and separation are executed, and the recording paper is cut away from the leading end part of roll paper 3. In this case, the leading end part of the roll paper 3 is abutted on the bottom surface of a cutter guide upper plate 24 and folded. The platen roll 5 is rotated in the direction of an arrow mark R, the leading end part is retreated in a reverse feeding direction UF, and returned to a home position. Thus, the leading end part abutted on the cutter guide upper plate 24 and folded is separated from the cutter guide upper plate 24 and the folding is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for discharging roll paper used as recording paper in image forming apparatuses such as facsimiles and printers.

[Conventional technology]

For example, some facsimiles use roll paper as recording paper, and in such facsimiles, the received information is recorded (printed) on the roll paper by thermal transfer, for example, and then the motor is rotated in the normal direction. The platen roller and discharge roller are rotated in the feed direction to feed the paper to a predetermined cutting/separation position. At this position, the rotary cutter cuts/separates the recording paper from the roll paper, and then the motor rotates forward again. Then, the motor is reversed to reverse feed the roll paper so that its leading edge is located at the home position (print standby position).

[Problem to be solved by the invention]

However, according to the above-mentioned conventional discharge method, as shown in Fig. 5 (
As shown in A), the roll paper 51 is cut with a cutter 52.
When separated, the leading end of the roll paper 51, which tends to curl downward, hangs down, and when the movable blade 53 of the cutter 52 is rotated in the return direction, as shown in FIG. is caught by the movable blade 53 and moves upward, and comes into contact with the lower surface of the cutter guide upper plate 54 and bends.If the roll paper 51 is fed in this state, as shown in FIG. Since the leading end of the roll paper 51 is fed while being bent, it may come into contact with the lower surface of the upper side plate 55 of the conveyance guide, causing the leading end to become more bent, thereby causing a paper jam. In each of the figures, 56 is a platen roller, 57 is a discharge roller, and 58 is a recording paper after printing.

In addition, when discharging multiple recording sheets one after another, after the cutting and separation, the motor is reversed to reverse feed the roll paper so that its leading edge is located at the home position. No inconvenience has occurred.

The present invention has been made with the above-mentioned considerations in mind, and its purpose is to provide a method for discharging roll paper that does not cause bending of the leading end of the roll paper or paper jams in any case. be.

[Means to solve the problem]

In order to achieve the above object, the method for discharging roll paper according to the present invention is that after the last recording paper of one cycle is cut and separated from the roll paper, only the platen roller is once rotated in the reverse feed direction, and then , is characterized in that the platen roller and the discharge roller are rotated in the feed direction.

[Effect]

According to the above configuration, after printing is completed, the roll paper is cut and separated at a predetermined position, and then only the platen roller is once rotated in the reverse feed direction to move the cut end of the roll paper back from the cutting position. Therefore, the bending of the tip is eliminated and the tip returns to its normal state, thereby completely achieving the above objective.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

First, FIG. 1 shows the configuration of a facsimile 1 as an example of an image forming apparatus to which the present invention is applied, and this facsimile 1 has a roll paper 3 rotatably held in a main body 2 of the apparatus by an appropriate means. , along the feed direction of the roll paper 3 (indicated by arrow F in the figure), the print head 4.
A platen roller 5, a cutter 6, and a discharge roller 7 are provided, and above these, a fluorescent lamp 8. Lens 9.
Optical system components such as CCD10 and document feed roller 1
A 1° contact glass 12 is provided at a predetermined position.

Further, 13 is a recording paper tray for receiving the recording paper after printing, 14 is a manuscript table for setting the original before sending, 1
Reference numeral 5 denotes a document tray for receiving the document after transmission.

In particular, the platen roller 5. The cutter 6° discharge roller 7 is constructed as follows. That is, as shown in FIG. 2, the platen roller 5 is connected to an appropriate drive transmission means 1.
6, and is configured to rotate in the direction shown by the arrow when the motor 17 rotates in the normal direction, and to rotate in the direction indicated by the arrow R, which is opposite to the direction shown by the arrow, when the motor 17 rotates in the reverse direction. The roll paper 3 is moved in the feed direction F or reverse feed direction UF by this platen roller 5.
transported to.

The cutter 6 includes a fixed blade 18 and a movable blade 20 that is provided above the fixed blade 18 and rotates in either forward or reverse directions around a shaft 19. Be sure to cut and separate only the parts.

Furthermore, the discharge roller 7 is attached to a shaft 22 via a one-way drive transmission means 21, and this shaft 22 is connected to a shaft (not shown) to which the platen roller 5 is attached via an appropriate drive transmission means 23. Therefore, the discharge roller 7 rotates in the same direction as the platen roller 5 rotates in the direction indicated by the arrow R, but even if the platen roller 5 rotates in the direction indicated by the arrow R, the discharge roller 7 rotates in the same direction as the platen roller 5 rotates in the direction indicated by the arrow R. It does not rotate in the direction of arrow R and remains stationary.

After printing, the facsimile 1 cuts the roll paper 3 at a predetermined position, and then moves only the platen roller 5 along the arrow R.
The leading edge of the roll paper 3 is moved slightly backward from the cutting position by rotating the roll paper 3 once, and then the platen roller 5 and the discharge roller 7 are rotated in the direction indicated by the arrow.
The recording paper cut and separated is discharged onto a recording paper tray 13 outside the main body 2 of the apparatus.

Next, the method for discharging roll paper according to the present invention will be explained with reference to the flowchart shown in FIG. 3 and the operational diagram shown in FIG. 4.

For example, assume that an A4-sized roll paper 3 is set in the apparatus main body 2, and that there are three A4-sized pages of information to be received.

When reception starts, the motor 17 rotates forward (step S1).
), the platen roller 5 and the discharge roller 7 rotate in the direction of the arrow, and the roll paper 3 whose tip end is waiting at a predetermined home position is fed out in the feed direction F and passes through the rad 4 for printing. At this time, information is sequentially printed (step S2). Then, when the recording paper on which one page of printing has been printed passes the cutter 6 and is fed so that the scheduled cutting position faces the cutter 6 (step 33), the motor 1
7 stops (Step 34), and accordingly both the rollers 5.7 also stop. Then, the movable blade 20 rotates downward to perform cutting and separation (step S5), and the recording paper is separated from the leading end of the roll paper 3. At this time, although not shown, the leading end of the roll paper 3 comes into contact with the lower surface of the cutter guide upper plate 24 and is bent.

At this point, it is determined whether all the sheets have been printed (step S6). In this case, since all the sheets have not been printed, the process proceeds to step S7. Then, this time the motor 17 reverses (
In step S7), the platen roller 5 rotates in the direction of the arrow R, thereby moving the tip in the reverse feed direction UF.
and returns to the home position (step S8).

As a result, the tip portion, which was bent due to contact with the cutter guide upper plate 24, separates from the cutter guide upper plate 24, and the bending is eliminated. At this time, the discharge roller 7 slips with respect to the shaft 21 due to the action of the one-way drive transmission means 21 and does not rotate in the direction of arrow R, so that the recording paper remains stopped at the cutting position.

Then, when the leading end of the roll paper 3 returns to the home position, the motor 17 rotates normally again, and when the above steps S2 and S3 are performed, the first page of recording paper that was stopped at the cutting position is fed. The paper is conveyed in direction F and discharged onto the recording paper tray 13 outside the main body 2 of the apparatus.

When printing of the third page is completed, the leading edge of the roll paper 3 is in the state shown in FIG. 4(A). In this figure, P indicates the most advanced page part of the roll paper 3 on which information is recorded (this will be the third and final page after cutting and separation), and P indicates the third cutting and separation (step 3
When step 5) is completed, it is determined in step S6 that the number of printed sheets has all been completed, and the process proceeds to step S9.

Here, the motor 17 is reversely rotated (step 39), the same figure (
As shown in B), the platen roller 5 rotates in the direction of the arrow, and the leading edge 3A of the cut and separated roll paper 3 retreats several degrees from the cutting position in the reverse feed direction UF (step 510). , the discharge roller 7 is connected to the one-way drive transmission means 2
1, the third page of recording paper P formed by the cutting and separation is stopped at the cutting position.

As described above, immediately after cutting and separation, the leading end 3A of the roll paper 3 retreats from the cutting position in the reverse feed direction UF for several minutes, so the leading end 3A separates from the cutter guide upper plate 24, and as a result, , the bending is resolved and the normal state is restored.

Then, when the motor 17 is rotated forward (step 511),
As shown in FIG. 3C, the discharge roller 7 rotates together with the platen roller 5 in the direction indicated by the arrow, so the third page of recording paper P, which had stopped at the cutting position, is fed out in the feed direction F, and the recording paper is discharged onto the tray 13 (step 51
2). At this time, in step 310, the reverse feed direction tJ
The leading end 3A of the roll paper 3, which has once retreated in the direction F, is also sent in the feed direction F by the platen roller 5. Therefore, when the operation of step SI2 is completed, the motor 17 is reversed again (step 513), and the roll paper 3 is retreated in the reverse feed direction UF to return its leading end 3A to the home position (step 314). 17 (step 315) and prepares for the next reception.

The above operation was performed when there were multiple sheets of recording paper, but when there is only one sheet of recording paper, the roll paper 3 is removed in step S5.
After the paper is cut and separated at a predetermined position, it is determined in step S6 that all the printed sheets have been printed, so the process immediately proceeds to step S9, and the subsequent steps 39 to 315 are processed. In other words, when there is only one sheet of recording paper, the same control as for the last page when there are multiple sheets of recording paper is sufficient. Therefore, in this case as well, immediately after cutting and separation, the motor 17 is reversed and the roll paper 3 is once retreated in the reverse feed direction UF, so the leading end 3A of the roll paper 3 may be bent or the paper Needless to say, clogging can be prevented.

(Effects of the Invention) As described above, according to the present invention, after cutting and separating the last recording paper of one cycle from the roll paper, only the platen roller is once rotated in the reverse feed direction to cut the roll paper. Since the rear tip is moved back from the cutting position,
Since the bending of the leading edge is eliminated and the leading edge returns to its normal state, the leading edge of the roll paper will not only be ejected continuously, but also when ejecting only the last page or one page. This eliminates the possibility of folded sheets or paper jams caused by this, and the usability of image forming apparatuses that use roll paper as recording paper has been greatly improved.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, FIG. 1 is a longitudinal sectional view showing a facsimile as an example of an image forming apparatus to which the method of the present invention is applied, and FIG. 2 shows the main parts thereof. FIG. 3 is a flowchart showing an example of the method of the present invention, and FIGS. 4(A), (B), and (C) are diagrams for explaining its operation. FIGS. 5(A), 5(B), and 5(C) are diagrams for explaining the prior art. 2...Device main body, 3...Roll paper, 5...Platen roller, 7...Ejection roller, P...Final recording paper, F...Feed direction, UF...Reverse feed direction. Applicant: Mita Kogyo Co., Ltd. Agent: Hideo Fujimoto, patent attorney

Claims (1)

[Claims] After recording on the roll paper, the recorded paper is cut and separated from the roll paper, and the recording paper is discharged from the main body of the apparatus by rotating a platen roller and a discharge roller in a feed direction. In the roll paper discharge method, the last recording paper of one cycle is cut from the roll paper.
After separation, only the platen roller is once rotated in the reverse feed direction, and then the platen roller and the discharge roller are rotated in the feed direction.