JPS61267624A - Device for hard copy - Google Patents

Abstract

PURPOSE:To allow a feeding and discharging mechanism to be simplified by configurating a device in such a way that detail paper is fed and discharged by a circulation driving force of a flat belt accompanied with the function of both a separating roller and a leaf spring which are pressed against the flat belt in a hard copy device using the specified length of detail paper. CONSTITUTION:A hard copy device includes a platen drum 1, a printing section comprising a thermal head 18, a conveying means which feeds detail paper 60 from a feeding and discharging opening 62 to the printing section, and another conveying means which discharges detail paper 60 that has been printed, to the feeding and discharging opening 62. A flat belt 37 which is circulated to the one-way direction, is provided between the feeding and discharging opening 62 and the printing section, and both a separating roller 39 and a leaf spring 38 are also provided near the flat belt 37. Detail paper 60 is designed to be fed to the printing section by the separating roller in cooperation with the flat belt 37. Furthermore, detail paper 60 is designed to be discharged from the feeding and discharging opening by the leaf spring 38 in cooperation with the flat belt 37.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a hard copy device, and particularly to a hard copy device that uses recording paper cut to a predetermined length.

[Background of the invention]

In a hard copy device that uses recording paper cut to a predetermined length, there is usually a conveyance means for feeding the recording paper from the paper insertion slot to the printing section, and a paper ejection port for transporting the recording paper after printing from the printing section. A means of conveyance is required to discharge the waste to the

Conventionally, as an example of such a conveyance means, a paper feed roller consisting of a pair of rollers and a paper ejection roller consisting of a pair of rollers are provided near a paper insertion opening and a paper ejection opening, respectively. By rotating and driving the recording paper, the recording paper is conveyed from the paper insertion slot to the printing section and the desired printing operation is performed.
It is known that the recording paper after printing is conveyed from the printing section to the paper ejection port by rotating a paper ejection roller to perform the ejection operation of the recording paper.

According to this conventional technology, recording paper cut to a predetermined length can be fed into the device using a cassette or manually, and the recording paper can be automatically ejected from the device after printing. Two drive systems are required to rotate each of the paper ejecting rollers, which results in a complicated structure and high cost.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and provide a hard copy device that is simple in structure and inexpensive.

[Summary of the invention]

In order to achieve this object, the present invention provides a rotating body that rotates in a single direction between a paper insertion port, a paper discharge port, and a printing section, and also provides a rotating body that is pressed into contact with the rotating body in the vicinity of this rotating body. The recording paper is conveyed in the supply direction and the discharge direction, respectively, by disposing first and second press bodies that can be used, and by the cooperation of the rotational driving force in one direction from the rotary body and both press bodies. It is distinctive in that it did so.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 are schematic front views showing an embodiment of the hard copy apparatus according to the present invention, in which FIG. 1 shows the paper feeding state in the recording paper cassette, and FIG. 2 shows the state of paper being ejected from the recording paper cassette. Paper condition, FIG. 3 shows the paper feeding condition when recording paper is manually fed, FIG. 4 is a schematic perspective view of the paper feed/discharge mechanism, FIG. 5 is a partial sectional view showing the slip mechanism in the separation roller, and FIG. 6 1 is an enlarged plan view of the paper feed/discharge mechanism shown in FIG. 1, and FIG. 7 is an enlarged front view of the paper feed/discharge mechanism shown in FIG. 2.

In these figures, l is a platen drum, and the shaft portion 1a of this platen drum 1 is rotatably supported by a bearing 4 attached to a substrate 3, and further connected to a drive motor 2 attached to the substrate 3. They are connected so that rotation can be transmitted.

A shaft 5 and a shaft 6 are implanted at a predetermined interval on the substrate 3, and each shaft 5.6 has a reel stand 7 for winding up ink paper.
And a feeding reel stand 8 is rotatably attached. One reel stand 8 is constantly applied with the required braking force by a leaf spring 9 and a brake shoe 10, and the other reel stand 7 is connected to a belt 11 and a pulley 12 rotatably attached to the shaft 5. The rotational power from the drive motor 2 is transmitted through a slip clutch 13 made up of a felt washer, a spring, etc. (not shown), and the drive motor 2 is driven to rotate.

The ink paper 14 before use is wound around a core 15 which is engaged with and placed on the feed reel stand 8, and the ink paper 14' after use is engaged with the take-up reel stand 7. The ink paper 1 is wound onto the core 16 placed on the paper.
The tip of 4.14' is fixed to the core 15.16.

A dogleg-shaped helad arm 1 on which the thermal head 1B is mounted on the tip portion is attached to the shaft 17 installed on the substrate 3.
9 is rotatably attached, and a spring 20
is wound. This spring 20 is mounted between a pin 21 implanted in the substrate 3 and a pin 22 implanted in the head arm 19, and biases them in a direction to separate them. The ink paper 14 is pressed between a portion of the platen drum 1 and the thermal head 18 by the elastic force of the spring 20.

23 is a paper guide, and this paper guide 23 is
It is attached to the substrate 3 along the lower side of the outer circumference of the platen drum 1. In addition, an auxiliary roller 25 is rotatably attached to the paper guide 23 via a leaf spring 24 and is attached to the platen drum 1.
This auxiliary roller 25
is configured to rotate following the platen drum l. Furthermore, a paper unloading sensor 26 is disposed in another part of the paper guide 23, and this sensor 26 can detect the presence or absence of recording paper being transported along the periphery of the platen drum l. ing. Note 1. The tip of the thermal head 18 transfers the ink paper 14 to the platen drum l.
It is rounded to make it easier to peel off.

Thermal head 1 of the above platen drum 1
8, an ejection piece 28 is attached rotatably around a shaft 27 mounted on the board 3, and a pin 29 implanted in this ejection piece 28 and a part 3 of the board 3 are attached.
A spring 30 is stretched between the platen drum 1 and the platen drum 1, and the spring 30 biases the tip of the discharge piece 28 so as to lightly press against a part of the circumferential surface of the platen drum 1.

Next, to explain the paper feed/discharge mechanism, the paper feed roller 31
The shaft portion 31a is rotatably supported by a bearing 32 attached to the base plate 3, and rotational power is transmitted from the drive motor 2 through a belt 33 and a pulley 34 fitted to the shaft portion 31a, so that the shaft portion 31a is rotatably driven. It has been like that. A pickup roller 35 is disposed at a predetermined interval on the side of the paper feed roller 31, and this pickup roller 35 is rotatably attached to a shaft 36 mounted on the nine board 3. A flat belt 37 is stretched over the paper roller 31 and the pickup roller 35. As a result, the pickup roller 35 can be rotated in accordance with the rotation of the paper feed roller 31. Further, a leaf spring 38 attached to a part of the substrate 3 is pressed onto the circumferential surface of the pickup roller 35 via a flat belt 37.

A roller arm 42 is located near the bottom of the paper feed roller 31.
is rotatably supported by a pin 41 implanted in the base plate 3, and a shaft 4 is connected to the roller arm 42 via a bearing 43.
0 is pivoted. A pulley 46 is fitted and fixed on the shaft 40, and a separation roller 39 is rotatably attached to the shaft 40. As shown in FIG.
It consists of a plastic pulley 39a and an elastic body 39b attached to the pulley 39a. Furthermore, as is clear from FIG. 5, a felt receiver 47 to which a felt washer 48 is attached and a stopper 50 are fitted and fixed to the shaft 40, respectively, and the pulley rotatably fitted to the shaft 40 is fixed. A spring 51 is elastically installed between the spring receiver 39a and the spring receiver 49, and a slip mechanism 63 is constituted by these springs. On the other hand, a pulley 44 is fitted and fixed to the shaft portion 31a of the paper feed roller 31, and a belt 45 is stretched between the pulley 44 and the pulley 46. Therefore, the rotational power of the paper feed roller 31 is transmitted to the pulley 44, the belt 45, and the pulley 4.
6 and the above-mentioned slip mechanism 63 to the separation roller 39.

A paper feed idler 52 is disposed diagonally below the separation roller 39, and this paper feed idler 52 is rotatably attached to a shaft 53 implanted in the substrate 3, and a portion of its circumferential surface is It meshes with the worm portion 54a of the motor 54. Further, the paper feed idler 52 is integrally provided with a protrusion 52a, and this protrusion 52a is configured to push down the lower end of the roller arm 42 when the paper feed idler 52 rotates clockwise in the drawing. Furthermore, a lift arm 5 is rotatably attached to a shaft 55 installed in the paper feed idler 52.
6 and a spring 57 are attached, and the spring 57 is mounted between the protrusion 56a of the lift arm 56 and a part of the paper feed idler 52 so as to bias the paper feed idler 52 in the counterclockwise direction as shown in the figure, around the shaft 55. has been done.

58 is a recording paper cassette, and this recording paper cassette 58
A vapor tray 59 is disposed inside the recording paper cassette 58, and the lift arm 56 can enter through a cutout in the lower part of the recording paper cassette 58. The recording paper 60 is placed in the vapor tray 59
The recording paper cassette 58 is arranged above the recording paper cassette 58, and is lifted together with the vapor tray 59 in conjunction with the rotation of the paper feed idler 52 in the counterclockwise direction shown in the figure. The uppermost recording paper 60 is in pressure contact with a part of the flat belt 37. Note that 61 is an exterior body that forms the outer shell of the apparatus, and a paper feed tray 61a, which is a part of this exterior body 61, is used for manually feeding the recording paper 60 and for ejecting the recording paper 60 from the apparatus. This is a tray used when recording paper 60 is fed and discharged using a common paper feed/discharge port 62.

Next, paper feeding, printing, and paper ejection operations will be explained.

To feed paper, either load the recording paper cassette 5B containing the recording paper 60, or place a sheet of recording paper 60 on the paper feed/discharge tray 61a and insert it into the paper feed/discharge port 62. It will be done. First, the former, that is, the paper feeding operation using the recording paper cassette 58 will be explained.

When loading the recording paper cassette 58, the paper feed idler 52
is in its initial state as shown in FIGS. 2 and 7. From this state, first, the drive motor 2 is rotationally driven to rotate the platen drum 1, the reel stand 7, the paper feed roller 31, the pickup roller 35, and the separation roller 39 in the clockwise direction in the figure.Next, the motor 50 is rotationally driven. Rotate the paper feeding eye 52 counterclockwise around the pin 53 by a required angle. Then, the protrusion 5 of the paper feed idler 52
2a also rotates counterclockwise, the tension of the belt 45 causes the separation roller 39 to rotate counterclockwise about the pin 41 together with the roller arm 42, so that the separation roller 39 is placed on the flat surface below the paper feed roller 31. It is pressed against the belt 37. At this time, the required pressure between the flat belt 37 and the separation roller 39 is obtained by the belt 45, and the separation roller 39 is driven by the driving force transmitted from the paper feed roller 31 via the flat belt 37. is larger than the driving force transmitted from the pulley 44 via the belt 45, the pulley 46, and the slip mechanism 63, and therefore rotates counterclockwise following the clockwise rotation of the paper feed roller 31.

On the other hand, the lift arm 56 also rotates in synchronization with the paper feed idler 52, lifts up one end of the recording paper 60 in the paper feed cassette 58 together with the paper tray 59, and the uppermost recording paper 60 is pressed against the lower surface of the flat belt 37. Ru. At this time, 60 pieces of recording paper
Although the overall thickness of the recording paper 60 varies depending on the number of sheets, this variation is absorbed by setting the spring 57 to generate a required pressure force between the flat belt 37 and the recording paper 60.

Then, when the uppermost recording paper 60 is pressed against the lower surface of the flat belt 37, the recording paper 60 is conveyed toward between the flat belt 37 and the separation roller 39 located below the paper feed roller 31. (See FIG. 1 and FIG. 6). At this time, due to the frictional force between the recording sheets 60, the plurality of recording sheets 60
However, between the flat belt 37 located below the paper feed roller 31 and the separation roller 39 (hereinafter referred to as the separation section 64 and shown in FIGS. 6 and 7).
By separating the recording paper 60 at , simultaneous conveyance of a plurality of recording papers 60 is prevented. Note that this recording paper separation operation will be explained later.

The recording paper 60 separated into single sheets in this way is guided by the lower surface of the ejection frame 28 and conveyed between the platen drum 1 and the paper guide 23, and is then sandwiched between the auxiliary roller 25 and the platen drum 1. Pressure conveyed. When the recording paper 60 passes above the sensor 26, the motor 50 is reversely rotated based on the detection signal from the sensor 26, and the paper feed idler 52 is rotated by a required angle around the pin 41. 52 to the initial setting shown in FIGS. 2 and 7.

As the platen drum 1 rotates, the recording paper 60 is
When the ink paper 14 is conveyed under pressure between the ink paper 14 and the peripheral surface of the platen drum 1, and passes between the thermal head 18 and the platen drum 1, electricity is started to be applied to the thermal head 18, and a printing operation is performed for the required time. In addition, ink paper 1 after use
4' is wound up by the drive of the reel stand 7. When printing is completed, the recording paper 60 is sent toward the flat belt 37 along the upper surface of the ejection frame 28 that is lightly pressed against the peripheral surface of the platen drum l, and is compressed between the flat belt 37 and the leaf spring 38. While being conveyed, the paper is fed from the registered paper discharge port 62 to the wandering paper tray 61a.
After that, the drive motor 2 is stopped and the operation is completed.

The above explanation is for one-color printing, but in the case of multi-color printing, by rotating the ejection frame 28 clockwise against the spring 30, a gap is created between the platen drum 1 and the ejection frame 28. - Recording paper 60 after color printing
is conveyed to the thermal head 1B again through this gap, and by repeating this operation, the next print is overlapped with the previous print to perform the desired multicolor printing, and when the multicolor printing is completed, it is ejected again. The frame 28 is lightly pressed against the circumferential surface of the platen drum l by the spring 30, and the printed recording paper 60 is ejected to the frame 2 in the same manner as in the case of τ color printing described above.
The recording paper 60 is conveyed along the upper surface of the recording paper 8 and discharged.

Next, the latter manual feeding operation will be explained based on FIG. 3.

In this case, first, the motor 50 is rotationally driven to rotate the paper feed idler 52 counterclockwise by a required angle, and the protrusion 52a
is separated from the roller arm 42.

Next, the drive motor 2 is rotated to drive the platen drum 1.
, rotate the reel stand 7, paper feed roller 31, and pickup roller 35 clockwise. Here, the separation roller 39
As described above, the paper feed roller 31 rotates as a result of the flat belt 37, so that it rotates counterclockwise. In this state, when one sheet of recording paper 60 is placed on the wandering paper tray 61a and pushed into the paper feed/discharge port 62, the recording paper 60 is conveyed under pressure by the separating section 64. The subsequent operation is the same as that in the case of using the recording paper cassette 58 described above, and the explanation thereof will be omitted.

Next, the aforementioned recording paper separation operation will be explained.

As already explained, when only the topmost sheet of the recording paper 60 conveyed by the flat belt 37 below the pickup roller 35 enters the separating section 64, it is transferred to the paper feed roller via the flat belt 37 and the recording paper 60. Since the driving force transmitted from the pulley 31 is larger than the driving force transmitted from the pulley 44 via the slip mechanism 63 etc., the separation roller 39 rotates counterclockwise, and the recording paper 60 moves onto the circumference of the platen drum 1. transported. On the other hand, when the recording paper 60 conveyed by the flat belt 37 on the lower side of the pickup roller 35 enters the multiple-sheet separation section 64 due to the frictional force between the recording papers 60, the frictional force transmitted by the recording papers 60 is small. In this case, the driving force transmitted from the paper feed roller 31 via the flat belt 37 and the recording paper 60 becomes smaller than the driving force transmitted from the pulley 44 via the slip mechanism 63 etc., and as a result, the separation roller 39 It rotates clockwise to transport the remaining recording papers 60, except for the top one recording paper 60, back to the separating section 64. Then, the flat belt 37 and the recording paper 60
When the driving force transmitted through the pulley 44 is balanced with the driving force transmitted from the pulley 44 through the slip mechanism 63 etc., the separation roller 39 comes to a standstill, and only one sheet of the recording paper 60 is placed on the same upper part of the platen drum 1. transported.

The recording paper 60 separated into one sheet in this way is sent to the sensor 26.
When the paper feed idler 52 is returned to the initial state shown in FIG. 7 based on the detection signal from the sensor 26, the remaining recording paper 60 along with the paper tray 59 is stored in the recording paper cassette 58. On the other hand, since the separating roller 39 is in its initial state, it rotates clockwise, and the leading edge of the recording paper 60 that remains after being separated by the separating unit 64 comes into contact with the circumference of the separating roller 39 that rotates clockwise. cassette 58
It is returned to the inside.

In this embodiment, a paper insertion port for feeding the recording paper 60 into the device and a paper discharge port for discharging the recording paper 60 after printing out of the device are integrated into one paper feed/discharge port. Since the recording paper 62 is shared, it is possible to eliminate the erroneous operation of inserting the recording paper 60 into the apparatus by misunderstanding the paper insertion slot and the paper output opening, and it is possible to provide a hard copy apparatus that is easy to operate.

〔Effect of the invention〕

As explained above, according to the present invention, the recording paper is supplied by the rotational driving force of the rotating body in a single direction and the cooperation of the first and second pressing bodies that can press against the rotating body. It is possible to provide a hard copy device that can be conveyed in both directions, the hard copy device and the discharge direction, and that has a simple structure and is inexpensive, eliminating the drawbacks of the prior art described above.

[Brief explanation of the drawing]

The figures all relate to embodiments of the present invention, and include Figures 1, 2, and 3.
The figure is a schematic front view of the hard copy device, Figure 4 is a schematic perspective view of the paper feed/discharge mechanism, Figure 5 is a partial sectional view showing the slip mechanism in the separation roller, and Figure 6 is the paper feed/discharge mechanism of Figure 1. FIG. 7 is an enlarged front view of the paper feeding and discharging mechanism shown in FIG. 2; 1... Platen drum, 14... Ink paper, 1
8...Thermal head (print head), 31...
- Supply roller, 35...Pickup roller, 37
...Flattening bolt (rotating body), 38... Leaf spring (pressing body), 39... Separation roller (pressing body), 60...
...Recording paper, 62...Paper feed/ejection port.

Claims (1)

[Claims] A printing section consisting of a platen roller and a printing head, a conveying means for supplying recording paper cut to a predetermined length from a paper insertion slot to the printing section, and a conveying means for transporting the recording paper after printing from the printing section to a paper ejection port. In the hard copy apparatus, a rotary body that rotates in a single direction is provided between the paper insertion port and the paper discharge port and the printing section, and a first hard copy device is provided near the rotary body. and a second pressing body are respectively disposed, and the first pressing body and the rotating body perform an operation of supplying the recording paper to the printing section, and the second pressing body and the rotating body A hard copy apparatus characterized in that the hard copy apparatus is configured to eject the recording paper from the printing section.