JP2539421B2 - Printer - Google Patents

Description

The present invention relates to a printer that is an output device such as an electronic computer or a word processor, and more particularly to a printer that can print on both single-cut and continuous forms.

[Conventional technology]

Conventionally, a printer that prints on a sheet with a printing head, such as an electronic computer or a word processor, has been configured as shown in FIG. That is, the print head 2 and the platen 3 are arranged opposite to each other on the upper portion of the printer body 1, and the cut sheet 5 is placed on the horizontal table 4 provided on the upper front surface of the printer body 1 on the paper insertion side. The single sheet 5 is put on the platen 3 by the conveying rollers 6 provided on both sides of the sheet.
It was sent to the upper side and printing was performed by the printing head 2. Further, when printing is performed on the continuous paper 7, as shown in FIG. 6, pull tractors 8 provided with sprockets that engage with guide holes formed on both sides of the continuous paper 7 are provided on the discharge side of the upper surface of the printer body 1. Then, the continuous paper 7 is fed onto the platen 3 through the horizontal table 4.
Reference numeral 9 is a cover that covers the printing portion.

According to the conventional printer as described above, it is easy to set the slip 5, and the operability is excellent, and since the slip 5 is inserted straight from the side, it is possible to print without bending down. Further, since the conveyance rollers 6 are arranged in front of and behind the printing head 2, it is possible to completely sandwich and convey the cut sheet 5, and it is possible to print on the cut sheet 5 having a short length. However, when printing is performed on the continuous paper 7, it is necessary to release the drive by the transport roller 6 and drive it by the pull tractor 8. Therefore, it is necessary to pull up the upper roller of the transport roller 6 to form a gap, which complicates the mechanism. There was a problem. In addition, when printing on the single-cut sheet 5, it is necessary to remove the continuous paper 7 from the platen 3, which is a troublesome operation.

To solve this problem, a printer proposed by the applicant of the present application and disclosed in Japanese Patent Laid-Open No. 159186/1981 is known. This proposal is based on the pull tractor 8 as shown in FIG.
Is disposed below the discharge side of the printer body 1, and the continuous paper 7 is wound around the platen 3 from below without passing through the transport roller 6 and pulled out backward. According to this proposal, it is not necessary to cancel the drive by the transport roller 6 when printing on the continuous paper 7. On the other hand, even when printing on the single-cut sheet 5, the continuous paper 7 does not have to be removed from the platen 3, and simultaneous settability can be achieved. Therefore, continuous paper 7
It is also possible to print both and the cut sheet 5 at the same time, and the printing on the continuous paper 7 can be saved as a record.

However, according to this proposal, when the continuous paper 7 is first set, the continuous paper 7 must be set from the lower rear portion, and there is a problem that the operability of winding the continuous paper 7 around the platen 3 is poor.

[Problems to be solved by the invention]

The present invention has a problem when it is possible to print on both single-cut sheets and continuous paper with one printer as described above.
Complicated mechanism by mounting the drive release mechanism of the transport roller,
Another object of the present invention is to provide a printer which solves the problem of the operability of setting the platen of continuous paper and can easily print on single-cut and continuous paper with a simple structure.

[Means for solving problems]

According to the present invention, in a printer capable of printing both a single-cut sheet and a continuous sheet, a table for placing the single-cut sheet is provided on the front side of the printing unit, and an automatic sheet feeding mechanism for the single-cut sheet and the continuous sheet are provided under the table. A guide portion for inserting the sheet into the printing portion is provided, and a drive unit for the continuous sheet is provided below the discharge side of the single sheet transport path.

Further, the above-described automatic paper feeding mechanism has at least one horizontal axis provided on the printing unit side, and a pair of facing side plates are provided so as to be movable on the horizontal axis, and the front side of the facing side plate is provided. A horizontal plate is rotatably supported inside, a roller is engaged with the horizontal axis, and a roller side end portion of the horizontal plate is provided with means for pressing the end portion toward the roller side. With the cut sheet interposed between the horizontal plate and the roller, the cut sheet is rotated in the direction in which the cut sheet is transferred to the printing unit side.

[Action]

According to the above configuration, the cut sheet, the automatic paper feed tray and the continuous paper can all be fed from the front surface of the printer, so that the operability is improved. According to the second aspect of the invention, the side plate of the automatic sheet feeding mechanism is moved to form a space for setting the continuous paper to the platen so that the setting can be performed easily. Since it is not necessary to release the continuous sheet and it is not necessary to remove the continuous sheet from the platen when printing the single sheet, simultaneous setting of the single sheet and the continuous sheet is possible, and the operability is remarkably improved.

〔Example〕

Hereinafter, embodiments of a printer according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. 7th in the figure
The same or equivalent parts as those of the conventional example shown in the figure are designated by the same reference numerals and the description thereof will be omitted. The feature of the present invention is continuous paper 7
The transport path 10 and the automatic paper feed mechanism 20 are configured. Inside the printer body 1, below the horizontal table 4, there is provided a guide portion 10 for inserting the continuous paper 7 from the outside and guiding it to the platen 3. As shown in FIG. 2, the horizontal table 4 is rotatable upward with one end on the printing unit 2 and platen 3 side as a fulcrum. The pull tractor 8 is provided inside the printer body 1 on the rear discharge side of the printing unit 2 and the platen 3. A paper restraint 11 is provided on the upper surface of the guide portion 10 while being elastically biased so as to press the continuous paper 7 toward the guide portion 10. As shown in FIG. 2, the cover 9 is rotatable upward with the vicinity of the discharge side end of the printer body 1 as a fulcrum.

When the manual operation is performed, the single-cut sheet 5a is inserted from the upper surface of the horizontal table 4 and is conveyed by the conveying roller 6 to reach the lower portion of the print head 2.

Printing is performed on the single-cut sheet 5 by the printing head 2 between the printing head 2 and the platen 3, and after the printing, the conveying roller 6
Is discharged to the stacker 30 side or returned to the horizontal table 4 again.

3 and 4 show the automatic paper feed mechanism 20. Horizontal axis
21a, 21b, 21c are locked to the printer body 1, and a pair of opposed side plates 22 are supported on the horizontal axis so as to be movable in the directions indicated by arrows A and B. In FIG. 3, one side plate 22
Only shown. A horizontal plate 23 is provided inside the side plate 22. The horizontal plate is rotatably supported by a shaft 24 in front of the side plates. The square shaft 25 penetrates the side plate 23a below the horizontal plate 23 at the lower rear side. The flange portion 22 is provided on the lower rear side of the side plate 22.
There is a, and a compression spring 26 is provided between the flange portion and the horizontal plate 23. A sheet receiver 27 is fixed to the square shaft 25 between the side plates 22. The upper surfaces of the horizontal plate 23 and the paper receiver 27 are located on the same plane, and the cut sheet shown in FIG.
A large number of 5b are set. That is, the horizontal plate 23 and the paper receiver 27 extend from the compression spring 26, and the angular shaft 25 is pushed down by a lever (not shown) provided outside the printer body 1, and then a large number of cut sheets are set. . After that, the horizontal plate 23 and the paper receiver 27 are lifted in the direction of arrow C by releasing the engagement of the lever. At this time, since the rollers 28 are provided on the horizontal axes 21a and 21b, the single-cut sheet is sandwiched between the horizontal plate 23 and the rollers 28.

The roller 28 rotates in the direction of arrow D by a gear mechanism (not shown). By the rotation of the roller 28, the single-cut sheets are sequentially sent to the printing unit from the upper one and printed. A spring 29 is provided between the side plate 22 and the paper receiver 27 through a square shaft 25 so as to maintain a gap therebetween.

When the continuous paper is set, the side plate 22 is moved in the direction of arrow A together with the roller 28 and the paper receiver 27. This is achieved by the pair of side plates 22 being separated from each other and being supported so that the horizontal shafts 21a to 21c can be slid to the left and right.

By moving the side plate 22, a wide space can be formed between the printer body 1 and the side plate 22, and the operator puts his hand in this space and inserts the leading end of the continuous paper 7 on the guide portion 10 below the horizontal table 4. Then, the paper is guided through the paper retainer 11 onto the platen 3 below the printing unit 2, and the sprocket holes of the pull tractor 8 are engaged with the sprocket holes formed on both sides of the continuous paper. After that, the side plate 22 may be moved in the direction of the arrow B to return it to the original state, and a single-cut sheet may be set here.

At this time, if the horizontal table 4 is rotated upward about one end on the platen side as shown in FIG. 2, the set operation of the continuous paper 7 becomes easy. Similarly, if the cover 9 is also rotated upward, the operation of engaging the continuous paper 7 with the pull tractor 8 through the space between the printing unit 2 and the platen 3 becomes easy.

The pull tractor 8 is operated to sequentially print on the continuous paper 7 by the printing unit 2, and the paper is stacked on the discharge side lower part of the printer body 1 as shown in FIG.

According to this embodiment, since the continuous paper 7 is inserted from the front side and can be set in the printing portion without the intermediary of the transport roller 6 and printing can be performed, even when the continuous paper 7 is printed, the upper portion of the transport roller 6 is not printed. It is not necessary to separate the roller from the lower roller to release the drive. Further, even when printing on the single-cut sheet 5 by the manual operation or the automatic paper feeding operation, it is not necessary to remove the continuous paper 7 wound around the platen 3, and the simultaneous settability improves the operability.
Further, since printing can be performed on the cut sheet 5 and the continuous paper 7 at the same time, there is an effect that the record can be stored.

Although the paper receivers 27 shown in FIG. 3 are independent of each other, they may be of a zigzag arrangement in which the ends are movably connected to each other. Also, the side plate 22 has three horizontal axes.
Although 21a to 21c are made to penetrate therethrough, one lateral axis may be penetrated if the side plate can be stably supported.

〔The invention's effect〕

As described above, according to the present invention, the guide portion for continuous paper is provided on the horizontal table on which a single-cut sheet for manual operation is placed, and on the lower part of the automatic sheet feeding mechanism for the single-cut sheet, and the pull tractor is provided on the lower part of the single-sheet conveying path. Since it is provided, the operability of the continuous paper set is improved, and it is possible to easily print a single-cut sheet and continuous paper with one printer.

[Brief description of drawings]

FIG. 1 is a schematic view showing a printer according to an embodiment of the present invention, FIG. 2 is a perspective view of the printer shown in FIG. 1, and FIG. 3 is a portion of an automatic paper feeding mechanism used in the printer shown in FIG. 4 is a schematic perspective view, FIG. 4 shows an automatic paper feeding mechanism used in the printer of FIG. 1, (a) is a partial longitudinal sectional view, (b), (c)
Is a cross-sectional view taken along the line AA and BB in FIG. 5A, and FIGS. 5 to 7 are schematic views showing a conventional printer. 1 ... Printer main body, 2 ... Printing section, 3 ... Platen,
4 ... Horizontal table, 5a, 5b ... Single sheet, 6 ... Conveying roller, 7 ... Continuous paper, 8 ... Pull tractor, 9 ... Cover, 10 ... Guide, 20 ... Automatic paper feeding mechanism, 21a-21c ……
Horizontal axis, 22 …… Side plate, 23 …… Horizontal plate, 25 …… Square axis, 26 ……
Compression spring, 28 ... Roller.

Claims (3)

(57) [Claims] 1. A printer capable of printing on both single-cut sheets and continuous paper, provided with a table on the front side of a printing unit for placing the single-cut sheets, and an automatic sheet-feeding mechanism for the single-cut sheets provided under the table. A guide unit for inserting continuous paper into the printing unit is provided below the automatic paper feeding mechanism, and a single sheet transport and discharge mechanism at the rear side of the printing unit and a continuous paper drive unit below the transport and discharge mechanism. The automatic paper feed mechanism is provided with at least one horizontal axis provided on the printing section side, and a pair of facing side plates is provided so as to be movable on the horizontal axis, and inside the facing side plates. A horizontal plate is rotatably supported in the front, a roller is engaged with a horizontal axis, and a means for pressing the end of the horizontal plate to the roller is provided at the roller-side end of each horizontal plate. The above-mentioned pair of side plates are horizontal plates, rollers, pressing means, and the horizontal axis is horizontal. It is adapted to be dynamic, roller printer single-cut roller and horizontal plates are rotated in a direction to transport the cut-sheet to the printing unit side in a state of being interposed. 2. A printer according to claim 1, wherein a flange portion is provided on the inner rear side of each side plate, and a compression spring is provided between the flange portion and each horizontal plate. 3. A horizontal shaft, which can move vertically, is provided in the vicinity of the roller according to claim 1, and the horizontal shaft penetrates a side plate provided below the roller side end of each horizontal plate. And a printer provided with a paper receiver that can move horizontally on the horizontal axis and is flush with the horizontal plate.