JP2679989B2 - Printer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer, and more particularly to a single-sheet feeding structure in an automatic sheet feeding mechanism. [Prior Art] As a printer capable of printing on single-cut and continuous forms
There is one described in Japanese Patent Publication No. 57-156285. Further, in order to automatically convey a plurality of cards set substantially horizontally to the information reading device, a feeding roller and a feed roller are provided, and a movable slide plate is provided to prevent the cards from being conveyed in a bent state. What is provided is Shoukou Sho 62
No. 14022. [Problems to be Solved by the Invention] In the former case of the above-mentioned prior art, since the continuous paper is inserted from the rear of the printer and the ledger is inserted from the front of the printer, the setting property of the continuous paper is poor, and In addition to the votes, no consideration was given to the layout of the automatic paper feed mechanism.In the latter, even if the hopper is changed according to the size of the paper, the position of the roller remains the same, so the paper is not rolled. The conveyance force received from the paper is often unbalanced in the left and right lateral directions that are perpendicular to the paper conveyance direction.This imbalance in the conveyance force causes the paper to tilt or wrinkle in the conveyance direction during printing. It is an object of the present invention to provide a printer having not only cut sheets and continuous paper but also an automatic paper feeding mechanism for cut sheets and having good settability. In addition to the above purposes, The present invention is to improve the printing quality of cut sheets regardless of the paper size. [Means for Solving Problems] A feature of the present invention is that a horizontal table for cut sheets is provided on the front of the printer from above. , An automatic paper feed mechanism and a guide unit for guiding continuous paper, a single-ply stacker on the back of the printer and a tractor for driving continuous paper below the stacker, and a conveyance roller on the printing unit side and an automatic paper feed side. Another feature is that a feed roller is provided between the feeding roller and the feeding roller.In the printer as described above, the automatic paper feeding mechanism is provided with a movable side plate,
Along with this movement, the feeding roller and the feed roller are moved. [Operation] In the former case of the above-mentioned conventional technique, it is difficult to dispose the automatic sheet feeding mechanism because of such a configuration. By the way, in order to improve the paper setting property, it is advantageous to arrange the paper feeding side on the front surface of the printer. Further, it is continuous paper that does not need to be set for a while after the paper is set once, and it is a cut sheet by manual paper feeding that must be fed at each time. The one located in the middle is a single sheet that is fed automatically. Therefore, if the cut sheets, the automatic paper feed, and the continuous paper are arranged in this order from the front of the printer, the setting property is good. Also, on the paper discharge side,
By positioning the tractor under the single-cut stacker, the continuous paper drive mechanism is not provided on the front surface of the printer, so that complication is avoided and the device becomes compact. Since the automatic paper feed is provided in the middle stage, a curved portion is generated in the conveying path of the automatically fed paper. A feed roller is provided to smooth the movement of the paper here. Further, since the feeding roller and the feed roller described above move together with the side plate of the hopper, the intervals are equal for any size of paper, and the carrying force received by the paper is even on the left and right, so the paper is carried. It does not tilt or wrinkle with respect to the direction. Embodiment An embodiment of the printer according to the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In the figure, 1
Is a printer body, 2 is a print head, 3 is a platen, 4 is a horizontal table, 5a is a single-cut sheet that is manually printed, and 6 is a single-cut sheet 5a.
Transport roller, 7 continuous paper, 8 pull tractor for paper 7, 9 cover, 10 transport path for paper 7, 11 hold paper 7, 20 automatic paper feed mechanism for 5b, 28 single paper 5 is a feeding roller, 30 is a single-cut sheet 5b feed roller, and 40 is a single-cut sheet 5a, 5b stacker. A guide 10 is provided below the horizontal table 4 in the printer main body 1 to insert the continuous paper 7 from outside and guide 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. On the upper surface of the guide section 10, a sheet holder 11 is provided so as to be elastically urged so as to press the continuous sheet 7 in the direction of the guide section 10. Also cover 9
As shown in FIG. 2, the printer can be rotated 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 40 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 feeding rollers 28 are provided on the horizontal shafts 21a and 21b, the single-cut sheet is the horizontal plate 23 and the feeding roller 28.
Sandwiched between. The delivery roller 28 rotates in the direction of arrow D by a gear mechanism (not shown). 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. Arms 22b and 22c are provided on the side plate, a follower feed roller 30a is rotatably supported on the arm 22b, and a U-shaped holder 31 capable of accommodating the drive feed roller 30b is provided on the arm 22c. The square shaft 32 penetrates the holder 31 and the drive feed roller 30b. A round hole is provided in the holder 31 and a square hole is provided in the drive feed roller 30b at the penetrating portion of the square shaft 32. Therefore,
When the square shaft 32 rotates in synchronization with the horizontal shafts 21a and 21b, the driving roller 3
0a rotates, but holder 30b does not rotate. A slight compressive force is applied between the drive feed roller 30b and the driven feed roller 30a, and when the drive feed roller 30b rotates, the driven feed roller 30a also rotates in the direction of arrow D due to the frictional force,
The cut sheet 5b is conveyed to the print head 2. Even if the size of the cut sheet 5b is changed and the side plate 22 is moved to one of the left and right sides which are perpendicular to the conveying direction indicated by A and B, the rollers 28, 30a, and 30b are moved to the side plates 22 together with the side plates 22 of A and B. Move in the direction.
Since the side plates 22 are present on both sides of the end of the cut sheet 5b in the left and right lateral directions, the cut sheet 5b always has the left and right lateral end portions of the upper and lower feed rollers 30a and 30b even if the size of the cut sheet 5b changes. Driven by being sandwiched between. Therefore, the conveyance force received by the single-cut sheet 5b does not become unbalanced in the lateral direction, and the single-cut sheet 5b does not tilt or wrinkle with respect to the conveyance direction, and stable and high print quality. Can be obtained. When the continuous paper is set, the side plate 22 is moved in the direction of arrow A together with the feeding roller 28, the feed rollers 30a and 30b, and the paper receiver 27. This is achieved because the pair of side plates 22 are separated from each other and the lateral shafts 21a to 21c, 32 are supported so as to be slidable from side to side. By moving the side plate 22, a wide space can be formed between the printer body 1 and the side plate 22. Therefore, 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. The continuous paper 7 is inserted from the front side and can be set in the printing portion without the intermediary of the conveying roller 6 to perform printing. Even when performing 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, it is possible to print on the cut sheet 5 and the continuous paper 7 at the same time. Although the paper receivers 27 shown in FIG. 3 are independent of each other, they may be arranged in a zigzag manner with their ends 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. [Effects of the Invention] As described above, according to the present invention, the paper setting property is good in any of single-cut, automatic paper feeding, and continuous paper,
Further, even if the size changes, the conveyance force received by the single-cut sheet does not change in the lateral direction, so that a printer with high printing quality can be obtained.

BRIEF DESCRIPTION OF THE 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 used in the printer shown in FIG. 4 is a partial perspective view of an automatic paper feeding mechanism used in the printer shown in FIG. 1, (a) is a partial longitudinal sectional view, and (b) and (c) are sectional views.
FIG. 3B is a transverse sectional view taken along the line AA ′, BB ′ of FIG. 1 ... Printer main body, 2 ... Printing head, 3 ... Platen, 5b ... Single sheet, 20 ... Automatic paper feeding mechanism, 21a to 21c ... Horizontal axis, 22 ... Side plate, 22b, 22c ... Arm , 23 …… Horizontal plate, 2
5,32 …… Square axis, 28 …… Feeding roller, 30a, 30b …… Feeding roller.

Claims (1)

(57) [Claims] In a printer that handles cut sheets and continuous paper, a printing unit that prints on the cut sheets or continuous paper, an automatic paper feed mechanism that sets a plurality of the cut paper, and an automatic paper feed mechanism provided below the automatic paper feed mechanism. The automatic paper feed mechanism is provided with a continuous paper feed port for feeding the continuous paper while the paper feed mechanism is mounted, and the automatic paper feed mechanism has a pair of opposed side plates for holding the cut sheet and an inner side of each of the opposed side plates. A horizontal plate to be installed, a paper receiving unit installed inside the horizontal plate and flush with the horizontal plate, and a feeding roller for feeding a single sheet set on the horizontal plate and the paper receiving unit. And a feed roller for feeding the cut sheet fed by the feeding roller to the printing unit, wherein the pair of side plates of the automatic paper feeding mechanism is the horizontal plate of the automatic paper feeding mechanism and the paper receiving unit. , It is possible to move with each roller. Printer to.