JP2543747Y2 - Recording paper positioning mechanism for printer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording paper positioning mechanism of a printer for positioning the leading end of the recording paper in the printer in the width direction.

[0002]

2. Description of the Related Art A recording paper and a transfer paper are interposed between a platen roller made of an elastic material and a thermal head provided so as to be in pressure contact with the platen roller, and the ink of the transfer paper is transferred to the recording paper. A transfer-type printer device for forming an image by using the same has already been provided. 4 to 6 show an example of the printer device. 4 and 5 are side views for explaining a recording paper positioning mechanism of a conventional printer device. FIG. 4 is a left side view in the width direction of the recording paper.
FIG. 5 is a right side view. FIG. 6 is a front view of a main part for positioning the recording paper in the width direction.

First, in FIG. 4 and FIG. 5, a recording paper 1 stocked in a recording paper cassette (not shown) is moved by a paper feed roller (not shown) along guides 2 and 3 between a platen roller 4 and a pinch roller 5. Sent in between. Then, the recording paper 1 is stopped by hitting a stopper 6 having a plane having a length substantially equal to the width of the recording paper 1. When the recording paper 1 comes into contact with the flat portion of the stopper 6 and the leading end position of the recording paper 1 is determined, the horizontal alignment arm 7 is pulled by the plunger 8 to move the platen roller 4.
The recording paper 1 is pressed against the fixing plate 9 (see FIG. 6), and the recording paper 1 is positioned in the width direction. The flat portion of the stopper 6 supporting the leading end of the recording paper 1 is provided downstream from the pressure contact between the platen roller 4 and the pinch roller 5 and upstream from the pressure contact between the platen roller 4 and the thermal head 12.

When the front, rear, left and right positions of the recording paper 1 are determined, the pinch roller 5 is pressed against the platen roller 4 and the recording paper 1 is securely clamped by the platen roller 4 and the pinch roller 5, and then the stopper 6 Is rotated back by a driving cam (not shown) connected to the pin 6b to a position where the traveling of the recording sheet 1 is not hindered by using the pin 6a as a pivot, and at the same time, the horizontal alignment arm 7 is also separated from the recording sheet 1. Then, the recording paper 1 is fed between the platen roller 4 and the transfer paper 11 along the guide 10 by the rotation of the platen roller 4. In this manner, the recording paper 1 and the transfer paper 11 are interposed between the platen roller 4 and the thermal head 12, and the thermal head 12 is pressed against the platen roller 4 to perform the transfer recording on the recording paper 1.

Although not shown, an encoder is integrally disposed on the axis of the platen roller 4, and the platen roller 4 is always stopped at a predetermined position by a reference signal of the encoder. I have. That is,
The stop position of the platen roller 4 when the front and rear and right and left of the recording paper 1 are positioned by the stopper 6 and the horizontal alignment arm 7 is always the above-described predetermined position in each color when a plurality of colors are transferred and recorded. It has become. Further, the recording start position is where the platen roller 4 is rotated by a predetermined pulse amount with respect to the above-described encoder reference signal. Furthermore, while being transcribed and recorded,
The leading end of the recording paper 1 is guided to guide rollers (not shown) along guides 13 and 14, and the transfer paper 11 is wound on a take-up bobbin (not shown) to complete the transfer recording of the first color. However, at this time, the recording is completed in a state where the rear end of the recording paper 1 is clamped by the pressure contact between the platen roller 4 and the pinch roller 5.

When the thermal head 12 separates from the platen roller 4, the platen roller 4 rotates in the reverse direction, the rear end of the recording paper 1 is returned along the guides 2 and 3, and the leading end of the recording paper 1 is And the rotation of the platen roller 4 stops when the above-described reference signal of the encoder reaches a predetermined position. After the stopper 6 returns to the state shown in FIG. 4, the pinch roller 5 separates from the platen roller 4. The leading end of the recording paper 1 that has become free due to the separation of the pinch roller 5 hits the stopper 6 by its own weight, and the leading end is automatically positioned, and the horizontal alignment arm 7 performs left / right positioning as described above.

By the above repetition, transfer recording of a plurality of colors is performed on the recording paper 1, and when the final recording is completed, the thermal head 12 and the pinch roller 5 are separated from the platen roller 4, and the recording paper 1 is discharged (not shown). The sheet is discharged to a predetermined position by a paper roller, and the platen roller 5 also reaches a predetermined position and stops rotating. Further, the stopper 6 also returns to the state shown in FIG. 4, and is ready for the next transfer recording.

[0008]

However, it is difficult to ensure a high degree of parallelism between the platen roller 4 and the stopper 6 with high accuracy due to factors such as assembly errors and component accuracy. Therefore, recording is performed as shown in FIG. The paper 1 is inclined with respect to the platen roller 4. Further, since the fixing plate 9 has a structure that does not recede from the recording paper 1, the recording paper 1 is kept in this state.
Is transported, the edge of the recording paper 1 is damaged by the fixing plate 9. Further, as described above, after the recording of the first color is completed, the recording paper 1 is reversely transported to the recording paper cassette (not shown) for the recording of the second color. As a result, the rear end of the recording paper 1 is caught on the fixing plate 9 and jamming occurs. Further, even if the recording paper 1 can be reversely transported, the position of the recording paper 1 in the width direction is shifted each time due to damage to the edge of the recording paper 1 in the process of positioning the leading end of the recording paper 1 for each color in the width direction. Which means that the registration of each color is shifted,
This results in extremely low recording quality.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems in the prior art, the present invention solves the above-mentioned problems of the prior art, and a platen roller that winds and rotates a recording paper, and transfers the recording paper to the platen roller via a transfer paper and the recording paper. A recording head positioning mechanism of a printer device, comprising: a thermal head that presses the recording paper against the platen roller; and a pinch roller that presses the recording paper against the platen roller. A leading end support member provided downstream of a pressure contact with a pinch roller and upstream of a pressure contact between the platen roller and the thermal head, for supporting a leading end of the recording paper; and a platen roller and the pinch roller. A side end receiving member that is provided upstream of the pressure contact and receives the side end of the recording sheet; and the recording sheet is pressed against the side end receiving member. And a horizontal alignment member that can freely contact and separate from the recording paper for positioning in the direction, and the tip end support member, the side end receiving member, and the recording paper positioned by the horizontal alignment member. The recording paper of a printer device, wherein the front end support member and the side end receiving member are retracted to a position where the recording paper is not in contact with the recording paper when the platen roller and the pinch roller pinch and transport the recording paper. A positioning mechanism is provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording paper positioning mechanism of a printer according to the present invention will be described below with reference to the accompanying drawings. Figure 1
FIG. 3 is a side view showing an embodiment of the recording paper positioning mechanism of the printer device of the present invention. 1 is a left side view in the width direction of the recording paper, and FIGS. 2 and 3 are right side views in the width direction of the recording paper. The same reference numerals are given to the same components as those of the conventional example described above with reference to FIGS.

1 to 3, a recording paper 1 stocked in a recording paper cassette (not shown) is moved between a platen roller 4 and a pinch roller 5 along guides 2 and 3 by a paper feeding roller (not shown). Sent. Then, the recording paper 1 is stopped by hitting a stopper 6 having a plane having a length substantially equal to the width of the recording paper 1. When the recording paper 1 comes into contact with the flat portion of the stopper 6 and the leading end position of the recording paper 1 is determined, the horizontal alignment arm 7 is rotated in a direction substantially parallel to the axis of the platen roller 4 by the suction of the plunger 8. Rotating plate 15 shown in FIGS. 2 and 3
The recording paper 1 is pressed against the recording paper 1 to position the recording paper 1 in the width direction. As is clear from FIG. 2, positioning of the recording sheet 1 in the width direction by the rotation plate 15 and the horizontal alignment arm 7 is performed as follows.
This is performed upstream of the pressure contact between the platen roller 4 and the pinch roller 5.

When the front, rear, left and right positions of the recording paper 1 are determined, the pinch roller 5 is pressed against the platen roller 4 and the recording paper 1 is securely clamped by the platen roller 4 and the pinch roller 5, and then the stopper 6 Is rotated back by a driving cam (not shown) connected to the pin 6b to a position where the traveling of the recording paper 1 is not hindered as shown in FIG. Move away from 1. In addition, when the stopper 6 is rotated and retracted, the rotating plate 15 is brought into contact with the stopper 6 that is in contact with the pin 15a.
The recording paper 1 is rotated to a position where the recording paper 1 does not come into contact with the pin 15b as a rotation fulcrum in conjunction with the rear end portion 6c.

The recording paper 1 is fed between the platen roller 4 and the transfer paper 11 along the guide 10 by the rotation of the platen roller 4. In this way, the recording paper 1 and the transfer paper 11 are interposed between the platen roller 4 and the thermal head 12, and the thermal head 12 is pressed against the platen roller 4 to perform the transfer recording on the recording paper 1.

Although not shown, an encoder is integrally disposed on the shaft of the platen roller 4, and the platen roller 4 is always stopped at a predetermined position by a reference signal of the encoder. I have. That is,
The stop position of the platen roller 4 when the recording paper 1 is positioned back and forth and right and left by the stopper 6 and the horizontal alignment arm 7 is always the same as the above-described predetermined position in each color when a plurality of colors are transferred and recorded. Has become. Further, the recording start position is where the platen roller 4 is rotated by a predetermined pulse amount with respect to the above-described encoder reference signal.

Further, while being transferred and recorded, the leading end of the recording paper 1 is guided to guide rollers (not shown) along guides 13 and 14, and the transfer paper 11 is taken up by a take-up bobbin (not shown). Then, the transfer recording of the first color is completed. At this time, the recording is completed in a state where the rear end of the recording paper 1 is held by the pressure contact between the platen roller 4 and the pinch roller 5. Then, the thermal head 12 separates from the platen roller 4 and the platen roller 4 rotates in the reverse direction, so that the rear end of the recording paper 1 is returned along the guides 2 and 3, and the leading end of the recording paper 1 passes through the stopper 6. When the reference signal of the encoder reaches a predetermined position, the rotation of the platen roller 4 stops.

Then, the stopper 6 returns to the state shown in FIG.
In conjunction with this, the rotating plate 15 also returns to the predetermined position. After that, the pinch roller 5 separates from the platen roller 4.
Recording paper 1 released by separation of pinch roller 5
The tip is automatically positioned by its tip hitting the stopper 6 by its own weight, and the horizontal alignment arm 7 performs left and right positioning as described above. By the above-described repetition, transfer recording of a plurality of colors is performed. When the final recording is completed, the thermal head 12 and the pinch roller 5 are separated from the platen roller 4, and the recording paper 1 is moved to a predetermined position by a discharge roller (not shown). After being discharged, the platen roller 5 also reaches a predetermined position and stops rotating. Further, the stopper 6 and the rotating plate 15 also return to the state shown in FIG. 2, and are ready for the next transfer recording.

As can be seen from the above description, according to the recording paper positioning mechanism of the printer of the present invention, when the recording paper 1 is transported in the reverse direction, the rotating plate 15 rotates and retreats in conjunction with the stopper 6. Therefore, even when the recording paper 1 is inclined, the recording paper 1 can be reversely transported to the rotating plate 15 which is a positioning member in the width direction of the recording paper 1 without contact, and problems such as jamming are easily caused. And high-quality transfer recording without registration deviation can be obtained. In the present embodiment, the stopper 6 for positioning the leading end of the recording paper 1 and the rotating plate 15 for positioning in the width direction are formed as separate components, but the rotating plate 15 may be formed integrally with the stopper 6. Good.

[0018]

As described in detail above, since the recording paper positioning mechanism of the printer of the present invention is constructed as described above, the recording paper can be reciprocally transferred to the positioning member in the width direction without contact. In addition, there is an extremely excellent effect in practical use that a problem such as jamming of a recording paper or edge damage can be satisfactorily solved, and high-quality transfer recording without registration deviation can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a recording paper positioning mechanism of the printer device of the present invention.

FIG. 2 is a side view showing one embodiment of a recording paper positioning mechanism of the printer device of the present invention.

FIG. 3 is a side view showing one embodiment of a recording paper positioning mechanism of the printer device of the present invention.

FIG. 4 is a side view showing a recording paper positioning mechanism of a conventional printer.

FIG. 5 is a side view showing a recording paper positioning mechanism of a conventional printer.

FIG. 6 is a partial front view showing a recording paper positioning mechanism of a conventional printer device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording paper 4 Platen roller 5 Pinch roller 6 Stopper (tip support member) 7 Horizontal alignment arm (horizontal alignment member) 11 Transfer paper 12 Thermal head 15 Rotating plate (side end receiving member)

Claims (1)

(57) [Scope of request for utility model registration] A platen roller that winds and rotates a recording sheet, a thermal head that presses the platen roller via a transfer sheet and the recording sheet, and a pinch roller that presses the recording sheet against the platen roller. A recording paper positioning mechanism of a printer device for transporting and recording the recording paper in the forward and reverse directions, wherein a pressure contact between the platen roller and the thermal head is provided downstream from a pressure contact between the platen roller and the pinch roller. A leading end support member provided upstream of a point for supporting the leading end of the recording paper; and a side end for receiving a side end of the recording paper provided upstream of a pressure contact between the platen roller and the pinch roller. A receiving member, and a horizontal alignment member which is capable of coming into contact with and separating from the recording sheet for pressing the recording sheet against the side end receiving member and positioning the recording sheet in the width direction. Configured Te, the leading end support member,
When the recording sheet positioned by the side end receiving member and the horizontal alignment member is nipped and transported by the platen roller and the pinch roller, the leading end support member and the side end receiving member are disengaged from the recording sheet. A recording paper positioning mechanism for a printer, wherein the recording paper positioning mechanism is configured to retreat to a contact position.