JPH0976589A - Paper feed mechanism of printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand a printing execution range by providing second roller members in opposed relationship in parallel to the rotary shaft of a first roller member so as to rotate them in the state respectively being in contact with both outer peripheral surfaces of the first roller member and rotating them while holding recording paper along with the first roller member. SOLUTION: When color printing is performed, an ink sheet 5 having three color dyes applied thereto repeatedly is circulated and the heating part 3a of a thermal head 3 is operated to sublime the dyes of the ink sheet 5 to apply the color printing of one screen to recording paper 4. The ink sheet 5 is taken up in order to print the next color but only the recording paper 4 is held between a platen roller 1 and pinch rollers 2a, 2b to be fed in a feed direction at a time of return. As mentioned above, the platen roller 1 and the pinch rollers 2a, 2b are alternately rotated in order to print three colors in predetermined order to feed the recording paper 4 to complete the color printing of one screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer device for printing an image from a personal computer, a television receiver or the like on a recording paper, and particularly to expanding the print execution range regardless of the insertion direction of the recording paper. The present invention relates to a paper transport mechanism of a printer device suitable for.

[0002]

2. Description of the Related Art In recent years, personal computers and video recording devices have become widespread, and various printer devices capable of recording images from these devices have been proposed, and their demand is also increasing. Therefore, there is a strong demand for a printer device that is inexpensive and capable of producing high-quality print images.

Generally, a printer apparatus is a color in which dyes of three colors, for example, yellow (Y), magenta (M), and cyan (C) are cyclically applied in a predetermined order in accordance with a video signal of an information source. Circulate the hard copy ink sheet and heat the Samar head to sublimate the dye in the ink sheet to form recording paper (heat transfer recording paper) 1
The screen is printed in color. Further, this printer device controls the time width of the current applied to the Samar head to adjust the amount of dye sublimated to perform gradation.

In the printer apparatus, a paper transport mechanism is usually used to transport the recording paper at the time of printing or before and after printing in order to print one screen on the recording paper as described above. That is, the recording paper can be conveyed to a predetermined position during printing by the paper conveyance mechanism, and can be sent out and accommodated in a paper discharge case after printing.

Generally, the paper transport mechanism includes a capstan reciprocating drive system and a platen reciprocating drive system, which have been conventionally used in printer devices. These paper transport mechanisms
There is a strong tendency for downsizing with the miniaturization of the printer device itself,
In addition to cost reduction, it is desired to effectively convey the recording paper in order to perform high-saturation printing in addition to cost reduction.

6 and 7 show the paper transport mechanism of the above conventional printer device.

6 and 7 show a conventional paper transport mechanism of a printer device. FIG. 6 is a schematic configuration diagram of a capstan reciprocating drive system, and FIG. 7 is a schematic configuration diagram of a platen reciprocating drive system.

As shown in FIG. 6, in the capstan drive system, the platen roller 50 is a printer device (not shown).
The platen roller 50, which is disposed at a predetermined position inside, rotates while sandwiching the recording paper 53 with the Samar head 52 joined at a predetermined pressure to convey the recording paper 53. In this case, an ink sheet 54 coated with dyes of three colors for printing is interposed between the head heating element 52 a provided inside the samar head 52 and the recording paper 53, and together with the recording paper 53. The platen roller 50 is conveyed by the rotating action.

In front of the platen roller 50 and the Samar head 52, a pair of capstan rollers 5 is provided.
1a and a pinch roller 51b are arranged to face each other. These capstan roller 51a and pinch roller 51b
Rotates the recording paper 53 while sandwiching the recording paper 53 with a predetermined pressure and conveys the recording paper 53 to a paper discharge case (not shown).

Now, it is assumed that printing is performed by using the above-described capstan drive type paper transport mechanism. The leading end of the recording paper 53 is the capstan roller 51a and the pinch roller 5
When the recording paper 53 is nipped by the 1b, the recording paper 53 is ready for printing at this point. In other words, in order to make the recording paper 53 ready for printing, the capstan roller, pinch roller 51a,
The length of the recording paper 53 up to the contact point at 51b and the length 1 from the contact point at the capstan roller 51a and the pinch roller 51b to the contact point between the platen roller 50 and the head heating element 52a are added to the recording paper 53. Must be inserted into the paper transport mechanism. That is, the area of (m + 1) from the leading edge of the recording paper 53 is also an unprintable area.

Thereafter, the head heating element 52a of the samar head 52 and the ink sheet 54 start printing. In this case, at the time of printing, the capstan roller 51a and the pinch roller 51b rotate as shown by an arrow in the figure and the platen roller 50 also rotates in the same direction, so that the recording paper 53 is conveyed to a predetermined print execution range. . When returning the recording paper 53 to print another color on the same screen (hereinafter, referred to as return time)
Includes a capstan roller 51a and a pinch roller 51b.
Rotates in the opposite direction (the direction of the arrow in the figure), and the recording paper 53 is conveyed to the original printing start point. Next, the second color (M) and the third color (C) are similarly printed. After that, the Samar head 52 and the head heating element 52
a is separated from the joined ink sheet 54, recording paper 53 and platen roller 50, and
The printed recording paper 4 is conveyed to a paper discharge case (not shown) by the rotating action of a and the pinch roller 51b.

Thus, in the capstan drive system,
The recording sheet 53 is conveyed along with the printing by the rotational driving action of the capstan roller 51a and the pinch roller 51b.

On the other hand, in another conventional platen driving method, the recording paper 53 is conveyed by rotational driving by a platen roller 55 as shown in FIG. That is, the recording paper 53 is conveyed by rotating the recording paper 53 while sandwiching the recording paper 53 with a predetermined pressure by a pair of pinch rollers 56a and 56b which are arranged to face each other near the circumference of the platen roller 55. Also, the platen roller 5
5 is a head heating element 52a of the samar head 52, and the recording paper 53 is rotated while being sandwiched at a predetermined pressure.
The conveyance force of the recording paper 53 is obtained.

In the platen drive system having such a structure,
Similar to the capstan drive method described above, in order to make the recording paper 53 ready for printing, a length of (m + 1) from the leading end of the recording paper 53 (in this case, m is the recording paper 53).
From the tip to the contact point between the pinch roller 56b and the platen roller 55, and l is the recording paper wound on the circumference of the platen roller 55 from this contact point to the contact point between the platen roller 55 and the head heating element 52a. (Length of 53) must be inserted into the paper transport mechanism. That is, also in this platen driving method, the area (m + 1) from the leading end of the recording paper 53 is an unprintable area, as in the capstan driving method described above.

Now, it is assumed that printing is performed using the above-described platen drive type paper transport mechanism. In this case, the leading end portion of the recording paper 53 is conveyed between the other pinch roller 56b and the platen roller 55, which face each other, via the Samar head 52 by the rotational driving of the platen roller 55 and the one pinch roller 56a. When the front end portion of the recording paper 53 is pinched between the pinch roller 56b and the platen roller 55, the recording paper 53 is ready for printing at this point.

Thereafter, the head heating element 52a of the samar head 52 and the ink sheet 54 start printing. In this case, at the time of printing, the platen roller 55 and the pinch rollers 56a and 56b both rotate in the direction of the arrow shown in the drawing, so that the recording paper 53 is conveyed to a predetermined print execution range. In addition, at the time of return to print other colors on the same screen, the platen roller 5
5 and the pinch rollers 56a and 56b rotate in opposite directions (arrow directions in the drawing) to convey the recording paper 53 to a predetermined position for printing one color,
Complete the print for one color. After that, the same operation as the above-described capstan drive system is performed, and the printed recording paper 5 is printed.
3 is conveyed to a paper discharge case (not shown).

As described above, even in the platen drive system, the platen roller 55 and the pinch rollers 56a, 56 are also provided.
The recording paper 53 accompanying the printing is driven by the rotation drive by b.
Is carried.

In consideration of the printing direction of the recording paper 53, the vertically arranged recording paper 53 is inserted and conveyed for printing, and the horizontally arranged recording paper 53 is inserted and conveyed for printing. There are cases. Normally, the recording paper 53 is arranged in a portrait orientation, and the recording paper 53 is inserted into the paper transport mechanism in that state. That is, printing is performed by inserting the recording paper 53 in the longitudinal direction. In this case, in the recording paper 53 to be printed, the print execution range is the range excluding the length (m + 1) from the leading edge of the recording paper 53 as described above. Therefore, a print margin portion, which is an area other than the print execution range, is formed at the leading edge of the recording paper 53. When the recording paper 53 to be printed is inserted in the longitudinal direction, this print margin portion does not need to be particularly reduced because it has a large print execution range.
When printing the recording paper 53 in landscape orientation, that is, when inserting the recording paper 53 into the roller mechanism of the paper transporter in the short direction and printing, the print execution range is vertically reduced compared to the case of the above portrait orientation. Therefore, it is desirable to shorten the print margin portion in order to expand the print execution range.

However, in the above-described conventional paper transport mechanism, since the print start position is already determined, the dimension of the print margin cannot be freely set, and in particular, the recording paper 53 is shortened. When printing is performed by inserting into the printer, the print margin portion is set to a predetermined size, and the print execution range is reduced. Therefore, it is possible to expand the print execution range by shortening the print margin portion.
The only method is to reduce the diameter of the platen roller 50, the capstan roller, the pinch rollers 51a, 51b, and other rotating rollers and bring them closer to the head heating element 52a side. Even if the paper transport mechanism is configured by this method, if the size of the recording paper 53 is large, the recording paper 53
In this case, the length of joining with the rotating roller such as the platen roller 50 is increased, and the print performance is adversely affected such as bending. Further, since there is a limit to the reduction of the diameter, the reduction of the print margin portion has not been realized yet.

[0020]

As described above, in the paper transport mechanism of the conventional printer apparatus, in order to transport the recording paper and make it ready to start printing, it is determined by the arrangement structure of the transport system such as the rotating roller. The recording paper must be transported for the predetermined length. Therefore, when the recording paper is conveyed in the short direction, it is desirable to reduce the print margin and expand the print execution range.However, the print start position is always fixed to a fixed position regardless of the recording paper conveyance direction. Therefore, there is a problem that the print margin cannot be freely set, that is, the print execution range cannot be expanded.

Therefore, the present invention has been made in view of the above problems, and has a structure in which the print start position can be set up to the vicinity of the end face of the recording paper, thereby expanding the print execution range regardless of the recording paper conveyance direction. An object of the present invention is to provide a paper transport mechanism of a printer device that can reduce the size of the print margin.

[0022]

According to a first aspect of the present invention, there is provided a paper transport mechanism for a printer device according to the present invention.
The roller member and the first roller member are arranged in parallel with each other so as to rotate while being joined to both outer peripheral surfaces of the first roller member. And a second roller member that conveys the recording paper by rotating while sandwiching the recording paper.

According to the first aspect of the present invention, the first roller member is rotationally driven to convey the recording paper. The second roller member is arranged in parallel with the rotation axis of the first roller member so as to rotate while being joined to the outer peripheral surfaces on both sides of the first roller member, respectively. The recording paper is conveyed by rotating while holding the recording paper. As a result, the recording paper can be conveyed by being sandwiched between the first and second roller members simply by inserting the leading end of the recording paper.

According to a second aspect of the present invention, in the paper transport mechanism of the printer device, the recording paper and the ink sheet are sandwiched and pressed between the Samar head and the first roller means for thermal transfer and printing. Printing is performed by thermal transfer in the above state, the recording paper is conveyed by the printing by the rotation of the first roller member, and the second roller having the first roller member and at least two auxiliary rollers In a paper transport mechanism of a printer device for transporting recording paper using a member and at least two auxiliary rollers in the second roller member so as to rotate while being joined to both outer peripheral surfaces of the first roller member, respectively. Are arranged in parallel with the rotation axis of the first roller member and opposite to both sides of the Samar head, and the first roller member and the second roller member are disposed. In with the only the recording sheet nipped and pressed, characterized by being configured to carry the rotation by said first roller member.

According to the second aspect of the present invention, at least two auxiliary rollers in the second roller member are connected to the outer peripheral surfaces on both sides of the first roller member to rotate, respectively. The roller member is arranged in parallel with the rotation axis of the roller member and opposite to both sides of the Samar head. At the time of printing and paper return, the first roller member and the second roller member
While only the recording paper is nipped and pressed by the roller member, the recording paper is conveyed by rotation by the first roller member. Therefore, the print start state by the samar head is achieved only by conveying the recording paper by the length from the leading end to the contact point between the first roller member and the second roller member. As a result, the print margin portion can be reduced and the print execution range can be enlarged.

According to a third aspect of the present invention, there is provided a paper transport mechanism of the printer device according to the second aspect, wherein the first roller member is the second roller member. The outer peripheral surfaces on both sides which are respectively pressed and joined to
The roller member is used instead of the member made of a material having a high friction coefficient to enhance the conveying force of the recording paper.

According to a third aspect of the present invention, the first roller member has the outer peripheral surfaces on both sides which are brought into pressure contact with and joined to the second roller member, respectively, and the recording paper is formed by the second roller member. It is formed in place of a member made of a material having a high friction coefficient for enhancing the carrying force. For example, a protruding roller member is used as the member made of a material having a high friction coefficient. As a result, the pressure contact state with the second roller member can be strengthened, and the conveying force of the recording paper can be strengthened.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.

1 to 3 show an embodiment of a paper transport mechanism of a printer device according to the present invention, FIG. 1 is a top view showing the structure of the main part of the device, FIG. 2 is a side view, and FIG. FIG. 6 is an explanatory diagram for explaining a printable state of recording paper.

As shown in FIG. 1, a platen roller 1 which is a main part of a paper transport mechanism is rotatably mounted inside a printer (not shown) about a rotary shaft 1a. The platen roller 1 is configured to be rotationally driven by the rotational power from a driving unit (not shown) being transmitted to the rotary shaft 1a.

On the outer peripheral surfaces at both end portions of the platen roller 1, pinch rollers 2 are joined to the outer peripheral surfaces of both outer end portions at a predetermined pressure and are rotatable as auxiliary rollers for paper conveyance.
a and 2b are arranged to face each other. Pinch rollers 2a, 2
b is a pinch roller 2 for holding the platen roller 1 in contact with the outer peripheral surfaces on both sides as shown in FIG.
The rotation center axes of a and 2b are the rotation axis 1a of the platen roller 1.
It is attached at a position horizontally moved by a predetermined distance from.
In addition, the ink sheet 4 is placed between the pinch rollers 2a and 2b.
A samar head 3 for cyclically printing the three-color paint applied to the recording paper 4 is interposed, and the rotation axes of the pinch rollers 2a and 2b are arranged on the center line extension of the heating element 3a of the samar head 3. Are arranged.

With this structure, when printing, the platen roller 1 and the pinch rollers 2a and 2b sandwich the recording paper 4 to be printed, and the platen roller 1
By rotating the pinch rollers 2a and 2b, the recording paper 1 can be conveyed in the front-back direction during printing. It should be noted that the recording paper 4 is of a size having a width sandwiched between the platen roller 1 and the two pinch rollers 2a and 2b as shown in FIG. 1, and when the recording paper 4 is printed in the short direction, , Insert as it is. On the other hand, when printing the recording paper 4 in the longitudinal direction, the recording paper 4 having a larger size than usual is used.

The ink sheet 5 used in the paper carrying mechanism of this embodiment is, for example, yellow (Y), magenta (M), and cyan (C) dyes of three colors are cyclically applied in a predetermined order. It is for color hard copy and is formed to have substantially the same width as the head heating portion 3a of the samar head 3 as shown in FIG. That is, by making the width substantially the same as that of the head heating portion 3a, the ink sheet 5 is prevented from being pinched by the platen roller 1 and the pinch rollers 2a, 2b while the recording paper 4 is being conveyed.
As a result, the ink sheet 5 is conveyed together with the recording paper 4 by the rotational driving action of the platen roller 1 and the head heating portion 3a during printing, and when returning, only the ink sheet 5 reaches a predetermined position by an ink sheet driving means (not shown). Simultaneously with being wound up, the recording paper 4 is conveyed in the opposite direction by the platen roller 1 and the pinch rollers 2a and 2b.

According to this structure, as shown in FIG. 3, the leading end of the recording paper 4 is moved from the leading end to the platen roller 1
And a contact point between the pinch rollers 2a and 2b and the head heat generating portion 3a, the length m is inserted into the paper transport mechanism,
It is possible to set the recording sheet 4 in a transportable state and a printable state. That is, the print margin portion can be reduced, and the print execution range of the recording paper 4 can be enlarged.

Next, the operation of the paper transport mechanism shown in FIG. 1 will be described with reference to FIG.
This will be described in detail with reference to FIG.

Now, it is assumed that printing is performed using the paper transport mechanism of this embodiment. Then, the recording paper 4 is taken out from the paper feed case by a paper feed roller (not shown), and the leading end of the recording paper 4 is conveyed between the platen roller 1 and the two pinch rollers 2a and 2b as shown in FIG. To be done. After that, the leading edge of the recording paper 4 is sandwiched between the platen roller 1 and the two pinch rollers 2a and 2b, and the recording paper 4 is rotated by the platen roller 1 and the pinch rollers 2a and 2b in the direction of the arrow (shown in FIG. 2). The sheet is conveyed to a predetermined position at which printing is possible in the (conveying direction during printing). That is, the recording paper 4 is fed from the front end to the platen roller 1
The sheet is conveyed by a length m to the contact point between the pinch rollers 2a and 2b. As a result, as shown in FIG. 3, it is possible to bring the recording paper 4 into the printable state only by conveying the recording paper 4 by the length m from the leading edge.

Next, printing by the Samar head 3 is started. Then, the Samar head 3 is set by a link mechanism (not shown) so as to come into contact with the outer peripheral surface of the platen roller 1 at a predetermined pressure. At this time, the head heating portion 3a (see FIG. 1) is pressed against the outer peripheral surface of the platen roller 1 with the ink sheet 5 and the recording paper 4 pressed against each other. Then, the recording sheet 4 is conveyed at the time of printing by the rotating action of the platen roller 1.

For example, when performing color printing,
Ink sheet 5 in which three color dyes of yellow (Y), magenta (M), and cyan (C) are cyclically applied in a predetermined order.
And the head heating portion 3a of the samar head is heated to sublimate the dye of the ink sheet 5 to perform one-screen color printing on the recording paper 4. That is, when performing color printing, the Samar head 3 is separated from the platen roller 1 after printing one color, and the recording paper 4 is moved within a predetermined print execution range. At this time, the ink sheet 5 is rolled up to print the next color, but only the recording paper 4 is sandwiched between the platen roller 1 and the pinch rollers 2a and 2b, and the direction of the arrow shown in FIG. ) Is transported to. In this way, the platen roller 1 and the pinch rollers 2a and 2b are
By rotating the recording paper 4 alternately in order to perform printing in a predetermined order of three colors, the color printing for one screen is completed.

In the present embodiment, the printing end point at the end of printing can be set up to near the base end of the recording paper by the conventional paper transport mechanism. That is, it is possible to extend the print execution range from the base end portion of the recording paper 4 to a portion having the length m.

In this way, the printed recording paper 4 is conveyed to a paper discharge case (not shown) while being sandwiched between the platen roller 1 and the pinch rollers 2a and 2b, and the conveyance of the recording paper 4 accompanying the printing is completed.

Therefore, according to this embodiment, the print startable portion can be set near the leading end portion of the recording paper 4, and the print end portion can be set near the base end portion of the recording paper 4. As a result, the execution range of the recording sheet can be expanded, and the print margin portion can be reduced. In particular, recording paper 4
When printing by printing in the landscape direction (short direction), the print margin can be reduced without reducing the diameter of the rotating roller such as the platen roller, so the print paper can be conveyed without bending. This is effective in improving the printing performance and expanding the print execution range.

Further, since the pinch rollers 2a and 2b are arranged on the same rotary axis extension line and on the outer peripheral surfaces of both end portions of the platen roller 1 so as to face each other, the recording paper 4 to be printed is conveyed. Can be carried in any direction, that is, in the long direction or the short direction, and in the case of printing without considering the print margin portions at both ends of the recording paper, the large-sized recording paper 4 can also be carried. There is also the effect.

By the way, generally, in the paper carrying mechanism of the printer device, in order to make the printing state highly accurate, it is necessary to reliably carry the recording paper 4 accompanying printing. FIG. 4 shows an embodiment in which the carrying force of the recording paper 4 that accompanies printing is effectively obtained.

In this embodiment, the platen roller 1, the pinch rollers 2a and 2b, and the samar head 3 are arranged as in the above embodiment,
The different point is that the contact outer peripheral surface 1b of the platen roller 1 facing the pinch rollers 2a and 2b is improved in order to obtain the conveying force of the recording paper 4 during printing.

As shown in FIG. 4, the paper carrying mechanism of the printer device in this embodiment is similar to the paper carrying mechanism shown in FIG. 1, and includes a platen roller 1, pinch rollers 2a and 2b, a samar head 3 and a head heating section. 3a is arranged.

Therefore, the platen roller 1 according to the present embodiment is designed so that the conveying force of the recording paper 4 can be increased more effectively.
It is formed by using a member made of a material different from that of the other portions so that the outer peripheral surface 1b with which the two pinch rollers 2a and 2b face each other and contact each other has a high friction coefficient. As a material having a high coefficient of friction, for example, a protruding roller formed of a material that does not damage the recording paper 4 is used. That is, by forming the contact outer peripheral surface 1b of the platen roller 1 as a protruding roller, it is possible to maintain the pressure contact state of the recording paper 4 nipped by the pinch rollers 2a and 2b.
When the platen roller 1 and the pinch rollers 2a and 2b are rotationally driven, the recording paper 4 can be securely engaged to obtain a conveying force.

FIG. 5 is a side view of the paper transport mechanism shown in FIG.

In the present embodiment, as shown in FIG. 5, the tip end portion of the recording paper 4 is driven by the rotation driving action of the pinch rollers 2a and 2b and the outer peripheral surfaces 1b on both sides of the platen roller 1. For a length of m. Then
The recording paper 4 is ready for printing. Then, printing is performed in the same manner as in the above embodiment. In this case, the conveyance of the recording paper 4 at the time of printing or returning is surely performed by the projecting rollers on both outer peripheral surfaces 1b of the platen roller 1 and the pinch rollers 2a, 2b. In this way, the recording paper 4 is conveyed at the time of printing, and one screen of color printing is completed.

Therefore, according to this embodiment, it is possible to obtain the same effect as that of the above-mentioned embodiment and to strengthen the paper conveying force of the recording paper 4 at the time of printing. As a result, high-precision printing is possible, and the performance of the printer device itself can be improved.

In the present embodiment, the platen roller 1 is provided with protruding roller members on both outer peripheral surfaces 1b as members having a high friction coefficient. However, the platen roller 1 is a normal one and is pinched. The outer peripheral surface of each of the rollers 2a and 2b may be replaced with a protruding roller having a high friction coefficient. Further, another member having a high friction coefficient may be formed on the entire outer peripheral surface of the platen roller 1 so as to surround the platen roller 1 so as to strengthen the conveyance force of the recording paper.

[0051]

As described above, according to this embodiment,
The print startable portion can be set near the leading end portion of the recording paper 4, and the print end portion can be set near the base end portion of the recording paper. As a result, the execution range of the recording sheet can be expanded, and the print margin portion can be reduced. In particular, when the recording paper 4 is conveyed in the laterally long direction (short direction) for printing, the print margin can be reduced without reducing the diameter of the rotating roller such as the platen roller. It is possible to convey the paper without bending and expand the print execution range.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a paper transport mechanism of a printer device according to the present invention.

FIG. 2 is a side view of the paper transport mechanism shown in FIG.

FIG. 3 is an explanatory diagram for explaining the operation of the paper transport mechanism shown in FIG. 1.

FIG. 4 is a configuration diagram showing another embodiment of the paper transport mechanism of the printer device according to the present invention.

5 is a side view of the paper transport mechanism shown in FIG.

FIG. 6 is a schematic configuration diagram showing a conventional paper transport mechanism of a capstan drive system.

FIG. 7 is a schematic configuration diagram showing a conventional platen drive type paper transport mechanism.

[Explanation of symbols]

1 ... Platen roller, 1a ... Rotating shaft, 2a, 2b ... Pinch roller, 3 ... Samar head, 3a ... Head heating part,
4 ... Recording paper, 5 ... Ink sheet.

Claims (3)

[Claims] 1. A first roller member that is rotationally driven, a samar head for printing with a recording paper and an ink sheet sandwiched between the first roller member, and a first roller member of the first roller member. The recording paper is arranged in parallel with the rotation axis of the first roller member so as to rotate while being joined to the outer peripheral surfaces of both sides, and the recording paper is rotated by sandwiching the recording paper with the first roller member. Second to transport
A paper transport mechanism for a printer device, comprising: 2. The printing is performed by performing thermal transfer while sandwiching and pressing the recording paper and the ink sheet between a samar head for thermally transferring and printing and the first roller means, and the printing is accompanied with the printing. Paper of a printer device that conveys recording paper by rotating the first roller member and also conveys recording paper using the first roller member and a second roller member having at least two auxiliary rollers. In the transport mechanism, at least two of the second roller members are joined to the outer peripheral surfaces on both sides of the first roller member so as to rotate.
Two auxiliary rollers are arranged in parallel with the rotation axis of the first roller member and on opposite sides of the Samar head, and only the recording paper is sandwiched between the first roller member and the second roller member. In addition, the paper transport mechanism of the printer device is configured such that it is transported by being rotated by the first roller member while being in pressure contact. 3. The first roller member has the outer peripheral surfaces on both sides which are brought into pressure contact with and joined to the second roller member, respectively.
3. The paper transport mechanism of the printer device according to claim 2, wherein the roller transport member is formed in place of a member made of a material having a high friction coefficient for enhancing the transport force of the recording paper by the roller member.