JP3791423B2 - Continuous paper conveying method of recording apparatus and recording apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a continuous paper conveyance method of a recording apparatus, particularly during backout conveyance, and a recording apparatus that performs this conveyance method.
[0002]
[Prior art]
In the recording apparatus, while the recording head travels in the axial direction of the platen, a plurality of recording wires in the recording head are struck onto a sheet positioned on the front peripheral surface of the platen via an ink ribbon, and an image is applied to the sheet. There is a dot impact printer that records.
[0003]
In such a printer, the recording head is mounted on a carriage and travels with the carriage. A ribbon mask holder is installed on the carriage to protect an ink ribbon (not shown) disposed in front of the recording head from the sheet and to form a sheet conveyance path with the platen.
[0004]
The sheet has continuous paper. When loading the continuous paper into the printer, first, the leading end side of the continuous paper is attached to the push tractor unit. Next, the carriage is moved to position the ribbon mask holder at a position where the ribbon mask holder can come into contact with all types of continuous paper having different paper widths. After that, by the operation of this push tractor unit, the leading edge of the continuous paper abuts against the ribbon mask holder to guide it upward (discharge unit side), and the leading edge is guided to the discharging unit to complete the continuous paper loading. ing.
[0005]
In addition, the ribbon mask holder is positioned at the loading position described above also during back-out conveyance in which the continuous paper is reversely conveyed from the discharge unit to the push tractor unit.
[0006]
[Problems to be solved by the invention]
However, when the ribbon mask holder is positioned at the loading position, that is, at a position where the ribbon mask holder can be brought into contact with all types of continuous paper having different paper widths even during backout conveyance, There is a risk of malfunction.
[0007]
In other words, the discharge roller of the discharge unit is faster than the push tractor unit in order to apply tension to the continuous paper to be discharged. This speed increase is the same during backout conveyance. For this reason, the continuous paper is excessively drawn into the printer by the discharge roller during the backout conveyance, and the continuous paper is slackened between the discharge roller and the push tractor unit. In particular, when continuous paper with a narrow paper width is transported back-out, the slack of the continuous paper that is not held by the ribbon mask holder becomes significant, and the slack affects the continuous paper from the tractor position in the paper width direction. End up. When the continuous paper having a narrow paper width is conveyed back out for a long distance, the continuous paper may be detached from the push tractor unit due to the above-described deviation.
[0008]
SUMMARY OF THE INVENTION An object of the present invention has been made in consideration of the above-described circumstances, and provides a continuous paper conveying method and a recording apparatus for a recording apparatus capable of preventing the continuous paper from being detached from the tractor during backout conveyance of the continuous paper. There is to do.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a recording apparatus that conveys continuous paper unloaded from a tractor to a discharge unit side through a paper path formed between a ribbon mask holder installed in a carriage and a platen. In the continuous paper transport method, the back side transport of the continuous paper from the discharge unit to the tractor side is performed at a position where the ribbon mask holder acts almost evenly on the continuous paper of the minimum width. It is characterized by moving.
[0010]
According to the second aspect of the present invention, the continuous paper unloaded from the tractor is conveyed to the discharge unit side through the paper path formed between the ribbon mask holder and the platen installed on the carriage, and this continuous In a recording apparatus for recording an image on a paper by a recording head mounted on the carriage performing a recording operation, a control device for controlling the conveyance of the continuous paper and the recording operation of the recording head is configured to output the continuous paper. And controlling the carriage to move to a position where the ribbon mask holder acts almost evenly on the continuous paper having the minimum width during backout conveyance in which the discharge unit is reversely conveyed to the tractor side. It is what.
[0011]
The invention according to claim 1 or 2 has the following effects.
[0012]
The transport speed of the discharge unit is determined by moving the carriage to a position where the ribbon mask holder acts almost evenly on the continuous paper of the minimum width during backout transport where the continuous paper is transported backward from the discharge unit to the tractor. Since the ribbon mask holder can suppress the slack of the continuous paper having a narrow paper width that occurs in the paper path when the paper is larger than the tractor, the continuous paper can be prevented from shifting in the paper width direction due to the slack. It can prevent coming off from the tractor.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a perspective view showing a printer body of a dot impact printer to which an embodiment of a recording apparatus according to the present invention is applied, and showing a backout conveyance state of continuous paper. FIG. 2 is a side sectional view of the printer main body of FIG.
[0015]
The printer 10 as the recording apparatus shown in these drawings strikes a large number of recording wires (not shown) of the recording head 18 against the sheet S via the ink ribbon 31 to record dots, thereby displaying an image including characters. This is a dot impact printer for printing. Here, the sheet S includes a passbook, a postcard, an envelope, and the like in addition to plain paper such as cut paper and continuous paper. In particular, the cut paper includes single copy paper, and the continuous paper includes continuous copy paper.
[0016]
As shown in FIG. 1, the printer 10 includes a printer main body 11 as a recording apparatus main body, a push tractor unit 12 and a discharge unit 13 that are detachably attached to the printer main body 11, and can also be detachably attached to the printer main body 11. 2, and an upper case and a lower case (not shown) that respectively cover the upper and lower portions of the printer main body 11.
[0017]
The printer main body 11 includes a base frame 14 as a main body frame, a sheet guide frame 15 (FIG. 2), a left side frame 16 and a right side frame 17, a printing mechanism unit 20 including a recording head 18 and a carriage 19, and a platen. 21, a sheet conveying mechanism unit 23 including a sheet guide 22 and a driven roller 25 (FIG. 2).
[0018]
The base frame 14 and the seat guide frame 15 are arranged substantially in parallel as shown in FIG. 2, and the left side frame 16 and the right side frame 17 are erected on both ends of the base frame 14 and the seat guide frame 15, respectively. Fixed. As shown in FIG. 1, a carriage guide shaft 24 is bridged between the left side frame 16 and the right side frame 17 so as to be pivotable, and a platen 21 is bridged so as to be rotatable. Has been. The seat guide 22 is disposed between the left side frame 16 and the right side frame 17 and is fitted and fixed to the seat guide frame 15. In addition, a tractor unit mounting portion and a discharge unit mounting portion (not shown) to which the push tractor unit 12 and the discharge unit 13 can be mounted, respectively, are provided at the rear and upper portions of the left side frame 16 and the right side frame 17, respectively. Yes.
[0019]
The push tractor unit 12 shown in FIG. 1 and FIG. 2 feeds a continuous sheet as a sheet S to the sheet transport mechanism 23, and the sheet supply guide 34 feeds a single sheet as a sheet S (single sheet copy paper). In this case, the sheets are fed one by one) to the sheet conveying mechanism 23. The discharge unit 13 pulls out continuous paper or cut sheet paper from the sheet transport mechanism 23 to the outside of the printer 10.
[0020]
That is, as shown in FIG. 2, the rotation of the tractor belt 26 of the push tractor unit 12 causes the continuous paper to be guided to the sheet guide 22 of the sheet transport mechanism 23 by the action of the pin 27 of the tractor belt 26. The sheet is fed in the direction of the arrow α toward the front of the platen 21 via a sheet conveyance path 28 formed between the sheet guide 22 and the platen 21. When the push tractor unit 12 is not in operation, the cut sheet paper can be supplied from the sheet supply guide 34 one by one (or one by one) to the front of the platen 21 via the sheet conveyance path 28. Further, as described later, the continuous paper or the cut sheet on which characters or the like are recorded by the recording head 18 is pulled out from the platen 21 of the sheet transport mechanism 23 in the direction of the arrow β by the rotation of the discharge roller 29 of the discharge unit 13. . As a result, the continuous sheet or cut sheet is conveyed in the sub-scanning direction orthogonal to the later-described main scanning direction of the carriage 19.
[0021]
The carriage 19 shown in FIG. 1 is slidably inserted into the carriage guide shaft 24 and has a recording head 18 mounted thereon. Since the carriage guide shaft 24 is arranged in parallel with the platen 21, the carriage 19 is provided so as to be movable (running) in the main scanning direction that coincides with the axial directions of the platen 21 and the carriage guide shaft 24.
[0022]
By forward or reverse rotation of a carriage drive motor (not shown), the carriage 19 is guided to the carriage guide shaft 24 via the timing belt 30 (FIG. 2) and travels leftward or rightward in FIG. 1 in the main scanning direction.
[0023]
The recording head 18 includes a large number of recording wires, and an ink ribbon 31 is positioned in front of the protruding direction of these recording wires. While the recording head 18 travels in the main scanning direction together with the carriage 19, the recording wire protrudes and strikes the ink ribbon 31, and the ink on the ink ribbon 31 is conveyed between the platen 21 and the ink ribbon 31. An image including characters is recorded on the sheet S by being attached to the sheet S (continuous paper or cut paper).
[0024]
This recording operation by the recording head 18 is performed by recording one line by the recording wire of the recording head 18 while the carriage 19 travels leftward or rightward in the main scanning direction. When the sheet S is continuous paper, the platen 21, the push tractor unit 12 and the discharge unit 13 of the sheet conveying mechanism unit 23 shown in FIG. 2 are used. When the sheet S is cut sheet, the sheet conveying mechanism unit 23 is used. The platen 21, the driven roller 25, and the discharge unit 13 each carry the sheet S by a predetermined amount (for the normal line interval), and these operations are repeated.
[0025]
2 is an opening formed between the base frame 14 and the sheet guide frame 15, and is a bottom sheet for supplying the sheet S from below the printer 10 into the sheet transport mechanism 23. Supply port.
[0026]
Further, the control of the conveyance of the sheet S by driving the platen 21, the push tractor unit 12 and the discharge unit 13 and the control of the recording operation by the recording wires of the carriage 19 and the recording head 18 are a control board unit 33 (FIG. 2). ). For example, the control board 33 is disposed below the sheet guide frame 15 behind the printer body 11.
[0027]
Meanwhile, a ribbon mask holder 40 that forms a sheet conveyance path 41 with the platen 21 and protects the ink ribbon 31 from the sheet S in the sheet conveyance path 41 is installed in the carriage 19 on which the recording head 18 is mounted. Has been.
[0028]
When the ribbon mask holder 40 is loaded to feed the continuous paper SR as the sheet S to the printer 10, the control board 33 controls the traveling of the carriage 19 to load the printer 10 as shown in FIG. 3. Thus, it is positioned at a position (loading position) where it can abut on all types of continuous paper SR having different paper widths. When the continuous paper SR is loaded, the ribbon mask holder 40 is positioned at the loading position, so that the push tractor unit 12 moves the platen from the push tractor unit 12 after the continuous paper SR is mounted on the push tractor unit 12. The leading edge of the continuous paper SR conveyed toward the sheet 21 abuts on the ribbon mask holder 40 and is guided upward (on the discharge unit 13 side), and passes through the sheet conveyance path 41 between the platen 21 and the ribbon mask holder 40. Then, it is guided to the discharge roller 29 of the discharge unit 13. Thereby, the loading of the continuous paper SR is completed.
[0029]
As shown in FIG. 1, the ribbon mask holder 40 controls the travel of the carriage 19 during back-out conveyance in which the continuous paper SR is conveyed backward from the discharge unit 13 to the push tractor unit 12 as shown in FIG. By positioning the carriage 19 with respect to the continuous paper SR having the minimum paper width used in the printer 10, the position where the pressing force is applied to the continuous paper SR having the minimum paper width almost uniformly (backout). Position).
[0030]
All the continuous paper SRs having different paper widths are sequentially conveyed to the push tractor unit 12, the sheet conveyance paths 28 and 41, and the discharge unit 13 during normal conveyance including a recording operation with reference to the left side of the printer 10. At the time of back-out conveyance described above, the sheet is sequentially conveyed to the discharge unit 13, the sheet conveyance paths 41 and 28, and the push tractor unit 12. The discharge roller 29 of the discharge unit 13 is accelerated more than the push tractor unit 12 and pulls out and discharges the continuous paper SR in a state where tension is applied. However, the discharge roller 29 is also accelerated than the push tractor unit 12 during backout conveyance. Yes. For this reason, during this backout conveyance, the continuous paper SR tends to sag in the sheet conveyance path 41 between the discharge unit 13 and the push tractor unit 12.
[0031]
In particular, in the continuous paper SR having a narrow paper width, the tendency to sag is remarkable. At this time, as described above, the ribbon mask holder 40 exerts a pressing force almost uniformly on the continuous paper SR having the minimum paper width. Since the ribbon mask holder 40 is positioned at the backout conveyance position, the sag of the continuous paper SR is suppressed by the pressing force that the ribbon mask holder 40 acts on the continuous paper SR having a narrow paper width. As a result, the continuous paper SR having a narrow paper width is prevented from shifting in the paper width direction from the position of the push tractor unit 12.
[0032]
Therefore, according to the said embodiment, there exist the following effects.
[0033]
At the time of backout conveyance in which the continuous paper SR is conveyed backward from the discharge unit 13 to the push tractor unit 12 side, the carriage 19 is placed at a position where the ribbon mask holder 40 exerts a pressing force almost uniformly on the continuous paper of the minimum width. Because of the movement, the ribbon mask holder 40 can suppress the slack of the continuous paper SR having a narrow paper width that occurs in the sheet conveyance path 41 when the conveyance speed of the discharge roller 13 of the discharge unit 13 is higher than that of the push tractor unit 12. it can. For this reason, the deviation in the width direction of the continuous paper SR caused by this slack can be suppressed. As a result, when the distance during the backout conveyance becomes long, the continuous paper SR is prevented from coming off from the push tractor unit 12. Can be prevented.
[0034]
As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.
[0035]
【The invention's effect】
According to the continuous paper conveying method of the recording apparatus according to the first aspect of the present invention, it is possible to prevent the continuous paper from coming off the tractor during backout conveyance of the continuous paper.
[0036]
According to the recording apparatus of the second aspect of the present invention, it is possible to prevent the continuous paper from coming off the tractor during backout conveyance of the continuous paper.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a printer body of a dot impact printer to which an embodiment of a recording apparatus according to the present invention is applied, showing a backout conveyance state of continuous paper.
FIG. 2 is a side sectional view of the printer main body of FIG.
3 is a perspective view showing a state of loading continuous paper in the printer main body of FIG. 1. FIG.
[Explanation of symbols]
10 Printer (recording device)
12 Push tractor unit 13 Discharge unit 18 Recording head 19 Carriage 21 Platen 40 Ribbon mask holder 41 Sheet conveyance path (paper path)
SR continuous paper

Claims (2)

In a continuous paper conveying method of a recording apparatus for conveying continuous paper carried out from a tractor to a discharge unit side through a paper path formed between a ribbon mask holder and a platen installed in a carriage,
The carriage is moved to a position where the ribbon mask holder acts almost evenly on the continuous paper having the minimum width during backout conveyance in which the continuous paper is conveyed backward from the discharge unit to the tractor. A continuous paper transport method for the recording apparatus. Conveying the continuous paper unloaded from the tractor through the paper path formed between the ribbon mask holder and platen installed in the carriage to the discharge unit side,
In a recording apparatus for recording an image on the continuous paper by the recording head mounted on the carriage performing a recording operation,
The control device for controlling the conveyance of the continuous paper and the recording operation of the recording head performs the back-up conveyance for reversely conveying the continuous paper from the discharge unit to the tractor side. A recording apparatus, wherein the carriage is controlled to move to a position where the ribbon mask holder acts substantially evenly.

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