JPH0692184B2 - Printer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a printing apparatus capable of printing in an optimal feeding state according to the type of printing paper.

[Prior Art] A conventional printing apparatus prints on a printing paper mounted on a platen rotatably supported between a pair of left and right frames while moving a print head in the axial direction of the platen.
The printing paper, which may be either single-cut paper or continuous paper, is pressed against the peripheral surface of the platen when the printing paper is fed, so the printing paper is curved according to the curvature of the platen.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional printing apparatus, since the printing paper is curved in accordance with the curvature of the platen when the printing paper is fed, the printing paper is printed after printing. It was easy to get so-called Makiguse. For this reason, after printing, the printing paper has to be unwound to be flat, and the printing workability is poor. In particular, in the case of thick printing paper, since it is easy to be wound up and has high bending stress during feeding, the printing paper is curved along the peripheral surface of the platen, and the printing paper is fixed to the platen. It was difficult to reliably press and feed the resin while applying its rotational force.
For this reason, the printing paper cannot be reliably fed with the rotation of the platen, and printing defects occur.

[Object of the Invention] In view of the above-mentioned conventional drawbacks, an object of the present invention is to feed the printing paper in a state suitable for the printing paper to improve the printing work efficiency and prevent printing defects. To provide a printing device.

[Means for Solving Problems] Therefore, the present invention provides a printing apparatus for printing on a printing paper attached to the platen while moving the print head along the printing line of the platen supported in the main body case. ,
The main body case of the printing device includes a first case that is substantially orthogonal to each other.
And a second installation surface, a paper insertion opening is provided on the first installation surface, and a paper inlet / outlet is formed on a body case surface substantially opposite to the first installation surface. And the second
The printer is configured such that any one of the installation surfaces of the printers can be arbitrarily directed downward.

[Advantageous Effects of the Invention] Since the present invention is configured as described above, when the printing apparatus is installed on the mounting surface of a desk or the like with the first installation surface facing downward, like the conventional printing apparatus. The printing paper can be fed using the paper inlet / outlet provided on the surface of the main body case opposite to the first installation surface. Further, when the printer is installed on a mounting surface such as a desk with the second installation surface facing downward, the printer is installed on the paper insertion opening provided on the first installation surface and the main body case surface on the opposite side. By using the paper inlet and outlet provided as described above, it is possible to feed the printing paper, which is relatively easy to be wrapped around, into a substantially flat shape. Therefore, by changing the installation state of the printing device according to the printing paper, it is possible to feed in the optimum feeding state according to the printing paper.

[Embodiment] An embodiment of the present invention applied to an impact printer will be described below.

FIG. 1 is a partially cutaway schematic view of an impact type printer according to the present invention, and FIG. 2 is a structure diagram of the printer.
A main body case 3 of a printer 1 as a printing device is formed in a substantially rectangular parallelepiped shape, and the main body case 3 has first and second installation surfaces 3a and 3b which are substantially orthogonal to each other. Then, the printer 1 is installed on a mounting surface such as a desk with the first installation surface 3a or the second installation surface 3b facing downward. A manual feed tray 5 is provided on the first installation surface 3a, and
It is supported so that it can be opened and closed approximately 90 degrees about the support shaft 7 and is substantially flush. A fixed plate and a movable plate (neither of which is movable) with respect to the fixed plate are provided on the sheet mounting surface of the manual feed tray 5, and a thick cut sheet which is one of printing sheets described later. The movable plate is moved according to the width of the paper 55 (not shown in FIGS. 1 and 2). A first sheet insertion port 9 as a sheet inlet is formed on the first installation surface 3a corresponding to the rotation base end of the manual feeding tray 5, and a thick sheet is inserted through the first sheet insertion port 9. The cut sheet 55 is supplied into the printer 1. A second sheet insertion port 11 is formed on the second installation surface 3b of the main body case 3, and a continuous sheet 53 (one of printing sheets to be described later) is formed through the second sheet insertion port 11 (see FIG. 1). And (not shown in FIG. 2) are supplied into the printer 1. A paper insertion / ejection opening as a paper entrance / exit on the top surface of the main body case 3.
15 is formed, and one side closer to the rear side of the paper insertion / ejection port 15 is used as an insertion port, which is one of the printing papers described later.
51 is supplied into the printer 1 and the paper insertion / ejection port 15
Thin single-cut paper after printing with the other side near the front of the printer as the outlet
51 is ejected out of the printer 1. Also, the paper insertion / ejection port 15
The thick cut sheet 55 printed through the other side near the front of the sheet is discharged to the outside of the printer 1. In the figure, 4a and 4b are the first
And a pedestal made of rubber or the like fixed to the second installation surfaces 3a and 3b.

A cylindrical platen 21 is rotatably supported between a pair of left and right frames (not shown) in the main body case 3. A platen drive motor (not shown) such as a step motor or a DC motor is connected to the platen 21. Then, the platen 21 is rotated in a desired direction in accordance with the driving of the platen drive motor, and the print sheet mounted on the platen 21 is fed. Two guide shafts 23 are horizontally provided between the frames in parallel with the axis of the platen 21. A carriage 25 is supported on the guide shaft 23 so as to be slidable in the axial direction of the guide shaft 23. A carriage drive motor (not shown) such as a step motor fixed to a frame is connected to the carriage 25, and the carriage 25 is reciprocated in parallel with the printing line of the platen 21 in accordance with the drive of the carriage drive motor. It A print head 27 is mounted on the carriage 25.
The print head 27 selectively magnetically drives a large number of built-in electromagnetic devices (not shown) based on print data, and print-drives a print wire (not shown) corresponding to the electromagnet device. As a result, desired print data is printed in the dot matrix.

Two paper feed rollers 29 and 31 are provided between the frames on the paper supply side and the paper discharge side of the platen 21.
It abuts the peripheral surface of 21 and is rotatably supported. The platen drive motor is connected to the two paper feed rollers 29 and 31, and the paper feed rollers 29 and 31 are rotated in the opposite direction in synchronization with the platen 21 as the platen drive motor is driven. Further, between the frames, a paper guide plate 33 is curved along the peripheral surface of the platen 21 on the paper supply side of the platen 21, and a thin single-cut sheet 51 is formed between the frame and the peripheral surface of the platen 21. It is mounted at the required intervals so that it can pass through. The sheet guide plate 33 bends the fed thin cut sheet 51 with a curvature corresponding to the peripheral surface of the platen 21.

A fixed shaft 35 and a rotary shaft 37 are attached between the frames. The platen drive motor is connected to the rotary shaft 37, and the rotary shaft is driven by the drive of the platen drive motor.
The 37 is rotated almost synchronously with the platen 21. The fixed shaft
A pair of left and right continuous paper feeding devices 39 are provided on the rotary shaft 37 and the rotary shaft 37.
The fixed shaft 35 and the rotary shaft 37 are slidably attached in the axial direction. The continuous paper feeding device 39 has a large number of pins (none of which are shown) on the peripheral surface of the feeding belt, and the pins have engagement holes (not shown) provided on both sides of the continuous paper 53. Engage. Then, the continuous paper 53 is fed by a pin that moves with the rotation of the rotary shaft 37.

Between the frames, a pair of paper guide plates 41 and 43 connect the paper placement surface of the manual feed tray 5 and the peripheral surface of the platen 21 corresponding to the printing position in a substantially linear state, and a thick cut sheet paper. 55 are mounted so as to face each other with a required space therebetween. Between the frames corresponding to the paper guide plates 41 and 43, two pairs of paper feed rollers 45 and 47 that are in contact with each other are rotatably supported on the manual feed tray 5 side and the platen 21 side, respectively. The paper feed rollers 45/47
Is connected to the platen drive motor, and the paper feed rollers 45 and 47 are rotated substantially in synchronization with the platen 21 as the platen drive motor is driven. As a result, the thick cut sheet 55 held by the sheet feed rollers 45 and 47 is fed to the platen 21 side.

Next, the paper feeding operation of the printer 1 configured as described above will be described with reference to FIGS.

First, the sheet feeding operation of the thin single-cut sheet 51 with relatively little unrolling will be described with reference to FIG.

The printer 1 is installed on a mounting surface such as a desk with the first installation surface 3a facing downward. At this time, the manual feed tray 5 is rotated around the support shaft 7 so as to close the first sheet insertion port 9, and the first installation surface 3a is substantially flush. When the thin cut sheet 51 is supplied from the sheet insertion / ejection port 15 into the printer 1 installed as described above, the thin cut sheet 51 is guided by the sheet guide plate 33 to the periphery of the platen 21 on the sheet supply side. You will be guided along the surface. When the platen 21 rotates in a desired direction in accordance with the driving of the platen drive motor, the thin single-cut sheet 51 is rotated by the platen 21 and the paper feed roller 29 which rotates in the opposite direction in synchronization with the platen 21. While being guided along 33, the paper is fed so that its front end is located between the paper feed roller 31 and the platen 21. At this time, the thin cut sheet 51 is the platen.
It is pressed against the peripheral surface of 21 and curved by the curvature of the platen 21. Then, in the above state, the carriage 25 is moved along the print line of the thin cut sheet 51 to selectively drive the print head 27 based on the print data, and the thin cut sheet fed to the printing position. The print data is printed in dot matrix format on the 51 print line. Then, the thin single-cut sheet 51 after printing is ejected to the outside of the printer 1 through the sheet insertion / ejection port 15. An automatic cut sheet feeder (not shown) is mounted on the upper surface of the main body case 3 so as to face the sheet insertion / ejection port. As is well known, this automatic cut sheet feeding device feeds a single sheet from a large number of thin cut sheet sheets 51 to the platen 21 in response to a signal from the printer body.

Next, in FIG. 3 showing the feeding action of the continuous paper 53, the first installation surface 3a is the same as the feeding of the thin single-cut sheets 51 described above.
After the continuous paper 53 is fed into the printer 1 through the second paper insertion port 11 with the printer 1 installed downward, the front end of the continuous paper 53 is fed to the paper feed roller 31 and the platen.
Position between 21 and. Then, the pins of the continuous paper feeding device 39 are engaged with the engagement holes provided on both sides of the continuous paper 53. At this time, the continuous paper 53 is curved along a part of the peripheral surface of the platen 21 and with a curvature corresponding to the platen 21. When the platen 21 is rotated, the continuous paper 53 is curved with a curvature corresponding to the platen 21 by the platen 21 and the continuous paper feeding device 39 that is driven in synchronization with the platen 21 and the paper feed roller 31, and the print head. The paper is sequentially fed to the printing position of the platen 21 which faces 27. And printed continuous paper
53 is discharged to the outside of the printer 1 through the paper insertion / ejection port 15 in accordance with the above feeding operation.

Next, a thick single-cut sheet that is relatively thick and easy to be rolled up.
In FIG. 4 showing the feeding action of the printer 55, from the installation state shown in FIGS. 2 and 3, the installation state of the printer 1 is set to about 90 so that the second installation surface 3b faces a mounting surface such as a desk. Change.
Then, the manual feed tray 5 is rotated about the support shaft 7 in the direction of the solid line shown in FIG. 4 by about 90 ° to bring the manual feed tray 5 into a horizontal state and open the first sheet insertion port 9. In this state, the thick cut sheet 55 placed on the manual feed tray 5 is the first
When fed between the sheet guide plates 41 and 43 through the sheet insertion port 9 of the sheet guide plate 41, the thick cut sheet 55 is fed by the sheet feed rollers 45 and 47 which rotate in synchronization with the platen 21. The paper is fed so that its front end portion is located between the platen 21 and the paper feed roller 31 while being guided in a flat shape between the 43. At this time, the thick cut sheet 55 is held in a substantially flat shape in the tangential direction to the peripheral surface of the platen 21. The thick single-cut sheet 55 printed in this state is discharged from the printer 1 through the sheet insertion / ejection port 15 as the platen 21, the sheet feed roller 31, and the sheet feed rollers 45 and 47 rotate.

As described above, according to the present embodiment, when printing on the thin single-cut sheet 51 or the continuous sheet 53 which is hard to be misaligned, the printer 1 is placed on a mounting surface such as a desk with the first installation surface 3a facing downward. By installing the thin cut sheet 51 or the continuous sheet 53, it is possible to feed the thin cut sheet 51 or the continuous sheet 53 while curving according to the curvature of the platen 21. In this case, thin cut sheet
The 51 can be put in and out on the upper surface of the main body case 3 as in the case of an ordinary printing apparatus, and an automatic cut sheet feeding device can also be used. Further, when printing on the thick cut sheet 55 which is easy to get stuck, by installing the printer 1 on a mounting surface such as a desk so that the second installation surface 3b faces downward, the thick cut sheet is formed. It is possible to feed 55 in a substantially flat shape. As a result, printing can be performed while feeding the printing paper in an optimum state according to the type of printing paper.

[Effects of the Invention] As described above, the present invention provides a printing apparatus capable of feeding a printing sheet in an optimum state according to the type of the printing sheet and improving the printing work efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an outline of an impact type printer, and FIGS. 2 to 4 are explanatory views showing a sheet feeding operation of the printer. In the figure, 1 is a printer as a printing device, 3 is a main body case,
3a is a first installation surface, 3b is a second installation surface, 9 is a paper insertion opening, 15 is a paper insertion / ejection opening forming a paper inlet / outlet, 21 is a platen, 27 is a print head, and 51 is one of printing paper. Is a thin cut sheet, 53 is a continuous sheet which is one of the printing sheets, and 55 is a thick cut sheet which is one of the printing sheets.

Claims (1)

[Claims] 1. A printer for printing on a print sheet mounted on the platen while moving a print head along a print line of a platen supported in the main body case, wherein the main case of the printer is substantially Orthogonal first
And a second installation surface, a paper insertion opening is provided on the first installation surface, and a paper inlet / outlet is formed on a body case surface substantially opposite to the first installation surface. A printing apparatus, wherein any one of the first and second installation surfaces can be arbitrarily directed downward so that the printing apparatus can be installed.