JP3089781U - Printing device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent a sheet from being stained due to a sheet floating up at a position facing a print head and coming into contact with the print head, and to perform a beautiful borderless printing. SOLUTION: A sheet 1 sent on a sheet supporting surface 12 is provided.
Above 00, the ink cassette 72 having the print head 12 is mounted, and the carriage 6 reciprocates left and right to perform printing on the paper 100. The paper discharge mechanism 3 and the paper feed mechanism 2 are separately arranged on both front and rear sides of the paper support surface 12. At each of the left and right ends of the carriage 6,
Pressing the paper 100 away from the paper feed mechanism 2 and pressing the paper 1
A paper pressing mechanism 5 for preventing 00 from contacting the print head 74 is added. The paper holding mechanism 5 is connected to the print head 7
4 and is formed by a star wheel 81 rotatably mounted on the carriage 6.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 According to the present invention, a printing device, in particular, a paper feeding mechanism and a paper discharging mechanism are arranged in front and rear sides of a paper supporting surface, and a print head is reciprocated in the left and right direction above the paper supporting surface to form a paper. The present invention relates to a printing device adapted to perform printing.

[0002]

[Prior art]

 FIG. 9 illustrates a main part of a conventional printing apparatus. The printing apparatus includes a paper discharge mechanism 3 and a paper feed mechanism 2 which are distributed on both front and rear sides of a paper support surface 12 formed by an upper surface of a base plate 1. The paper feed mechanism 2 includes a paper feed roller 21 and a plurality of paper press rollers 22 combined with the paper feed roller 21. The paper discharge mechanism 3 includes a paper discharge roller 31 that contacts the back surface of the paper 100 that has passed over the paper support surface 12, and a plurality of paper discharge rollers 31 that are opposed to the paper discharge roller 31 and contact the print surface of the paper 100. And the star wheels 32. In FIG. 9, even if one roller having a long axial length is used for each of the paper feed roller 21 and the paper discharge roller 31, they are provided at a plurality of locations at predetermined intervals in the axial direction of the rotating shafts 23 and 33. A roller having a short axial length may be used.

An ink cassette 4 is provided with a print head 41 below the ink cassette 4. The ink cassette 4 is mounted on a carriage (not shown) and reciprocates in the left-right direction along the paper support surface 12 above the paper support surface 12. Printing is performed on the paper 100 on the paper support surface 12 with ink ejected from the print head 41 during the backward movement.

In this printing apparatus, the print head 41 prints on the paper 100 sent out onto the base plate 1 by the paper feed mechanism 2. Then, the printed paper 100 is discharged by the paper discharge mechanism 3.

In this printing apparatus, the paper 100 is moved between the paper feed mechanism 2 and the paper discharge mechanism 3 by means such as providing a difference between the paper feed speed of the paper feed mechanism 2 and the paper feed speed of the paper discharge mechanism 3. When the position is regulated by both, a certain tension is applied to the sheet 100. The vertical interval H between the print head 41 and the paper support surface 12 is set in a range of 1 to 1.5 mm. If the vertical interval H is too large, the print quality deteriorates. If the width is too narrow, the paper 100 may come into contact with the print head 41 even if the paper 100 vibrates. If the vertical interval H is within the above numerical range, the print quality may be degraded. In addition, it has been confirmed that the situation in which the paper 100 contacts the print head 41 hardly occurs. Therefore, when the position of the paper 100 is regulated by both the paper feed mechanism 2 and the paper discharge mechanism 3, the interval between the paper 100 and the print head 41 is kept constant, and stable printing is performed. In this printing apparatus, even when the paper 100 is sandwiched by the paper discharge mechanism 3 after the trailing end 101 of the paper 100 is disengaged from the paper feed mechanism 2 as shown in the illustrated example, even if the paper 100 Is printed by the print head 41 on the paper 100 positioned at the position of the paper 100. In particular, when performing borderless printing, the unprinted area is not extended to the rear end of the paper 100 so that no unprinted area remains at the rear end of the paper 100. Printing is performed.

However, when the rear end 101 of the paper 100 comes off the paper feed mechanism 2, the rear end 101 of the paper 100 rises from the paper support surface 12 due to the curl of the paper 100 or the weight of the front end of the paper 100. Due to the situation, even when the vertical distance H between the print head 41 and the paper support surface 12 is set in the above numerical range, a situation may occur in which the print head 41 comes into contact with the print head 41 as shown in FIG. . Then, when such a situation occurs, there is a problem that the paper 100 is stained with ink and the print quality is deteriorated.

Therefore, as shown in the printing apparatus shown in FIG. 10, a plurality of different star wheels 35 are added between the star wheel 32 of the paper discharge mechanism 3 and the print head 41 in the left-right direction. A measure is taken to hold the paper on the paper support surface 12 in front of the print head 41 by the foil 35 to prevent the paper from floating, and the rear end of the paper comes into contact with the print head 41 to cause paper contamination. Is prevented and beautiful borderless printing is possible.

On the other hand, Japanese Patent Application Laid-Open No. 2001-302060 (Prior Art 1) discloses that, in an ink jet image forming apparatus, when continuous printing is performed on a plurality of sheets, the printing of the paper discharged first on the paper discharge tray is dried. In order to prevent the next discharged paper from sliding and contacting the print surface before it is cut, the lower paper discharge roller and the upper discharge roller, which is the counterpart of the paper discharge roller, are arranged side by side in the horizontal direction. In the paper section, the paper is curved into a waveform, so that the timing at which the subsequent paper discharged to the paper output tray slides on the printing surface of the paper discharged earlier on the paper output tray is delayed. The technology is described.

In Japanese Utility Model Publication No. 3059587 (Prior Art 2), a paper guide groove is provided in a base plate, and both right and left edges of the paper printed by the print head are passed through the paper guide groove. This describes a technique for restricting the position of a sheet, preventing the trailing edge of the sheet away from the sheet feeding mechanism from rising, and preventing the sheet from contacting the print head.

[0010]

[Problems to be solved by the invention]

 However, in the conventional printing apparatus shown in FIG. 10, the number of star wheels 35 added side by side in the horizontal direction increases, and the number of peripheral components required as a result of adding the star wheels 35 increases. As a result, there was a problem that this would increase costs.

On the other hand, the prior art 1 merely delays the timing of discharging the succeeding paper to the paper discharge tray in order to dry the printing surface of the paper previously discharged to the paper discharge tray. However, it is not possible to prevent the problem in the conventional printing apparatus described above, that is, the contamination of the sheet caused by the rear end 101 of the sheet 100 coming off the sheet feeding mechanism 2 coming up and coming into contact with the print head 41.

On the other hand, in the case of the preceding example 2, the left and right edges of the sheet printed by the print head are regulated by the sheet guide grooves of the base plate. The lifting of the trailing end 101 is prevented by the sheet guide groove, and therefore, the stain on the sheet due to the contact of the trailing end 101 of the sheet 100 with the print head 41 can be temporarily prevented.

However, in the case of the prior art 2, since the positions of both edges of the paper 100 are only regulated by the paper guide grooves, the position of the print head 41 which performs printing while moving in the left and right direction is opposite to that of the print head 41. The lifting of the paper is not always prevented. For example, in a state where the print head 41 prints at the center of the paper 100 in the width direction, even if both edges of the paper 100 are regulated by the paper guide grooves, the center of the paper 100 in the width direction is maintained. A situation may arise in which the paper comes up from the guide plate and comes into contact with the print head 41 to cause paper stains.

The present invention has been made in view of the above problems, and minimizes the number of additional star wheels and the like, and lifts the paper at a position opposed to a print head that performs printing while moving in the left-right direction. An object of the present invention is to provide a printing apparatus capable of reliably preventing a situation in which the trailing edge of a sheet detached from a sheet feeding mechanism comes into contact with a print head and thereby cause sheet contamination.

[0015]

[Means for Solving the Problems]

 The printing device according to the present invention mounts an ink cassette provided with a print head above the paper sent on the paper support surface, and prints on the paper by reciprocating the carriage from side to side. In a printing apparatus in which a paper discharge mechanism and a paper feed mechanism are separately arranged on both front and rear sides of the paper support surface, the carriage presses a paper whose rear end is separated from the paper feed mechanism to hold the paper. The paper press mechanism that prevents the paper from contacting the print head is added.

According to this, the rear end of the carriage, which carries the ink cassette and reciprocates left and right, presses the paper whose rear end is separated from the paper feeding mechanism, and prevents the paper from contacting the print head of the ink cassette. Since the paper press mechanism is added, the paper does not rise up at the position facing the print head and comes into contact with the print head, and stable high print quality can be obtained even when performing borderless printing.

It is preferable that the paper pressing mechanism is a ring body rotatably mounted on the carriage around a rotation axis in the front-rear direction. According to this, the carriage moves while the carriage is in contact with the paper so that the carriage rolls on the paper, so that the paper pressing mechanism does not rub the printing surface of the paper. For this reason, paper contamination caused by the paper pressing mechanism rubbing the printing surface of the paper is also prevented.

It is desirable that the above-mentioned ring body is made of a star wheel. According to this, since the ring body makes point contact with the sheet and rolls on the sheet, the ring body rolls on the sheet. There is no paper stain caused by the paper. Moreover, by using a star wheel for the wheel, it is possible to use a star wheel having the same shape and size as the star wheel used for the paper discharge mechanism as the wheel for the wheel. This makes it possible to construct a wheel body without increasing the types of parts, which makes it easier to reduce costs.

[0019] It is desirable that the above-mentioned ring body be disposed at a position in front of the above-mentioned print head. According to this, the action of preventing the rear end of the paper from contacting the print head is prevented until the rear end of the paper detached from the paper feeding mechanism completely passes through the position facing the print head. Therefore, even when performing borderless printing, the situation where the trailing edge of the paper comes into contact with the print head and becomes dirty is reliably prevented.

The above-mentioned ring body may have the above-mentioned rotation axis parallel to the paper feeding direction, and may be a rotating member having a post-constricted shape in which the pointed teeth are arranged in the circumferential direction. In this case, It is desirable that the front end of the rotating member be disposed at the front side of the print head. This also provides the same effect as when the star wheel is used for the wheel. Further, when the above-mentioned rotating member is used for the ring body, by disposing the rotating member in a range from the front side to the side portion of the print head, the action of suppressing the lifting of the rear end of the paper detached from the paper feeding mechanism is reduced. Since the print head can be extended from the front to the side, even when performing borderless printing, the situation where the trailing edge of the paper touches the print head and becomes dirty is more reliably prevented. . In addition, since the rotating member has a rearwardly constricted shape, there is an advantage that it is less likely that the front end of the sheet that has passed through the paper feeding mechanism abuts against the rotating member.

The printing apparatus according to the present invention is provided with an ink cassette provided with a print head above the paper fed on the paper support surface, and the carriage reciprocates right and left, whereby the paper In a printing apparatus in which a paper discharge mechanism and a paper feed mechanism are separately arranged on both front and rear sides of a paper support surface, a rear end is provided at each of the left and right ends of the carriage. A paper press mechanism has been added to press the paper away from the paper mechanism to prevent the paper from contacting the print head, and the paper press mechanism is located in front of the print head and moves forward and backward with the carriage. It is possible to adopt a configuration in which it is composed of a star wheel rotatably mounted around the rotation axis of the direction.

Further, the printing apparatus according to the present invention mounts an ink cassette equipped with a print head above the paper sent on the paper support surface, and reciprocates the carriage left and right to form a print on the paper. In a printing device that performs printing and has a paper discharge mechanism and a paper feed mechanism separately arranged on both front and rear sides of the paper support surface, two ink cassettes are mounted on the carriage side by side. A paper press mechanism is added between the two ink cassettes to press the paper away from the paper feed mechanism to prevent the paper from contacting the print head, and the paper press mechanism is used for the paper press. A rotating member having the above-mentioned rotation axis parallel to the feed direction and having a converging shape in which the pointed teeth are arranged in the circumferential direction, and the front end of the rotating member is located on the front side of the print head. It is also possible to adopt a configuration of being deployed as such.

[0023]

[Embodiment of the invention]

 FIG. 1 is a schematic front view of a main part of the printing apparatus according to the embodiment of the present invention, FIG. 2 is a schematic side view of the main part seen from the direction of arrow II in FIG. 1, and FIG. FIG. 4B is a side view, and FIG. 4 is an operation explanatory view.

In FIG. 1 or FIG. 2, reference numeral 6 denotes a carriage, which is guided by a horizontal guide shaft 61 and a guide rail 62 and reciprocates right and left. Further, in order to enable color printing, the printing apparatus of this embodiment has two ink cassettes 71 and 72 on which the carriage 6 can perform printing of different colors. Each of the print heads 72 has a print head 73, 74 located at the same level.

A paper discharging mechanism 3 and a paper feeding mechanism 2 are disposed on both sides of the front and back sides of a paper supporting surface 12 formed by the upper surface of the base plate 1. The paper discharging mechanism 3 and the paper feeding mechanism 2 have the same configuration as that of the conventional printing apparatus described with reference to FIG. That is, the paper feed mechanism 2 includes a paper feed roller 21 and a plurality of paper press rollers 22 combined with the paper feed roller 21. The paper discharge mechanism 3 includes a paper discharge roller 31 that contacts the back surface of the paper 100 that has passed over the paper support surface 12, and a plurality of paper discharge rollers 31 that are opposed to the paper discharge roller 31 and contact the print surface of the paper 100. And a plurality of star wheels 32. Even if a single roller having a long axial length is used for each of the paper feed roller 21 and the discharge roller 31, a roller having a short axial length is provided at a plurality of positions at predetermined intervals in the axial direction of the rotating shafts 23 and 33. May be used. In this printing apparatus, the print heads 73 and 74 perform color printing on the paper 100 sent out onto the base plate 1 by the paper feed mechanism 2, and the printed paper 100 is discharged by the paper discharge mechanism 3. .

As described in the conventional example, in this printing apparatus, the paper 100 is fed to the paper feeding mechanism by means such as giving a difference between the paper feeding speed of the paper feeding mechanism 2 and the paper feeding speed of the paper discharging mechanism 3. When the position is regulated by both the sheet discharge mechanism 2 and the paper discharge mechanism 3, a constant tension is applied to the paper sheet 100. Further, the vertical interval H between the print head 41 and the paper support surface 12 shown in FIG. 4 is set in a range of 1 to 1.5 mm. If the vertical interval H is too wide, the print quality is degraded. If the vertical interval H is too narrow, the paper 100 may come into contact with the print head 41 even when the paper 100 vibrates. In this case, it has been confirmed that the print quality does not deteriorate, and that the paper 100 is unlikely to come into contact with the print head 41. Therefore, when the position of the paper 100 is regulated by both the paper feed mechanism 2 and the paper discharge mechanism 3, the distance between the paper 100 and the print head 41 is kept constant, and stable printing is performed.

In this printing apparatus, when performing borderless color printing, as shown in FIG. 4, after the rear end 101 of the paper 100 has come off the paper feed mechanism 2, the paper 100 is sandwiched by the paper discharge mechanism 3. Even when the printing is performed, printing is performed by the print head 41 on the paper 100 positioned on the paper support surface 12 and printing is performed so that an unprinted area does not remain at the rear end of the paper 100. Will be At this time, if the rear end of the paper 100 rises due to the curl of the paper 100 or the weight of the front end of the paper 100 and comes into contact with the print heads 73, 74, the print heads 73, 74 Even when the vertical interval H with the paper support surface 12 is set in the above numerical range, the rear end 101 of the paper 100 contacts the print heads 73 and 74 in the same manner as described with reference to FIG. That can happen. Then, when such a situation occurs, the paper 100 is stained with ink, and the print quality is reduced.

Therefore, in this embodiment, as shown in FIG. 1 or FIG. 2, a star wheel 81, which is an example of a wheel body, is provided on both left and right ends of the carriage 6, that is, on both left and right sides of the two print heads 73 and 74. The paper holding mechanism 5 is added. These star wheels 81 are located on the front side of the print heads 73 and 74, and are rotatably mounted on the carriage 6 such that the rotating shaft 82 is horizontal in the front and rear directions. As shown in FIGS. 3A and 3B, the star wheel 81 has a required number of pointed teeth 83 arranged in the circumferential direction. The star wheel 81 prevents the rear end 101 from pressing the sheet 100 separated from the sheet feeding mechanism 2 as shown in FIG. 4 so that the sheet 100 does not contact the print head. More specifically, as shown in FIG. 4, by setting the position level of the lower end of the star wheel 81 between the print heads 73 and 74 and the paper support surface 12, the paper 100 is moved from the paper feed mechanism 2 to the paper discharge mechanism. When the position is regulated by both mechanisms 3 and the paper 100 is given a certain tension, the star foil 81 does not contact the paper 100 and the rear end 101 of the paper 100 separated from the paper feed mechanism 2 is bent. When the paper 100 is lifted from the paper support surface 12 due to the habit or the weight of the front end, the paper 100 is pressed by the star wheel 81 at a position where the paper 100 is opposed to the print heads 73 and 74 and does not contact the print heads 73 and 74. ing. Therefore, even in the case of performing borderless printing, the paper 100 does not contact the print heads 73 and 74 to prevent the paper from being stained, and stable high print quality can be obtained.

In particular, since the star wheel 81 having the pointed teeth 83 is used for the ring constituting the paper holding mechanism 5, the movement of the carriage 6 causes the paper support at the position opposed to the print heads 73 and 74. Since the pointed teeth 83 of the star wheel 81 are in point contact with the paper 100 floating from the surface 12 and roll on the paper 100, paper stains caused by the star wheel 81 rubbing with the paper 100. Does not occur. In addition, since the star wheel 81 is disposed at the front side of the print heads 73 and 74, the rear end of the paper 100 detached from the paper feeding mechanism 2 completely passes through the position facing the print heads 73 and 74. Until the printing operation is completed, the star wheel 81 exerts the function of preventing the contact of the paper 100 with the print heads 73 and 74, thereby enabling clean borderless printing, and the paper 100 comes into contact with the print heads 73 and 74. It is possible to surely prevent the situation of being dirty. In addition, the star wheel 81 used as a wheel body can be formed in the same shape and size as the star wheel 32 used in the paper discharging mechanism 3, so that the paper pressing can be performed without increasing the types of parts. This makes it possible to form a ring body that constitutes the mechanism 5, and has the advantage that the cost can be easily reduced.

FIG. 5 is a schematic front view of a main part of a printing apparatus according to another embodiment of the present invention, FIG. 6 is a schematic side view of the main part seen from the direction of arrow VI in FIG. 5, and FIG. 8 is a schematic perspective view illustrating the paper pressing mechanism 5. FIG. In this embodiment, the rotating member 85 shown in FIG. 8 is adopted as a loop forming the paper pressing mechanism 5, and the rotating member 85 is connected to the two ink cassettes 71 and 72 as shown in FIG. It is attached to the carriage 6 so as to be located between them. As shown in FIG. 8, the rotating member 85 is formed in a posterior constricted shape in which the pointed teeth 86 are arranged in the circumferential direction. As shown in FIG. 7, the carriage 6 is rotatably mounted on the carriage 6 so that the rotation axis 87 is horizontal. The front end 88 is located in front of the print heads 73 and 74 and the rear end of the print heads 73 and 74. It extends to a nearby location. In addition, as shown in FIG. 7, the rotating member 85 presses the sheet 100 whose rear end 101 is separated from the sheet feeding mechanism 2 to prevent the sheet 100 from contacting the print head. More specifically, as shown in FIG. 7, by setting the position level of the front lower end of the rotating member 85 between the print heads 73 and 74 and the paper support surface 12, the paper 100 is fed to the paper feed mechanism 2 When the position is regulated by both the paper feed mechanism 3 and the paper 100 and a certain tension is given to the paper 100, the rotating member 85 does not come into contact with the paper 100, and after the paper 100 separated from the paper feed mechanism 2, When the end 101 rises from the paper support surface 12 due to the curl or the weight of the front end, the rotating member is moved to a position where the paper 100 does not contact the print heads 73 and 74 at a position facing the print heads 73 and 74. It is made to be held down by 85. Therefore, even when performing borderless printing, the paper 100 does not come into contact with the print heads 73 and 74, thereby preventing the paper from being stained, and stable high print quality can be obtained. In particular, since the rotating member 85 is disposed in a range from the front side to the side portions of the print heads 73 and 74, the function of suppressing the rising of the rear end 101 of the sheet 100 detached from the paper feed mechanism 2 is reduced. Since it can be exerted in the range from the front side to the side portions of the sheets 73 and 74, even when performing borderless printing, the rear end 101 of the paper 100 comes into contact with the print heads 73 and 74 and becomes dirty. Can be more reliably prevented. In addition, until the rear end 101 of the paper 100 detached from the paper feeding mechanism 2 completely passes through the position facing the print heads 73 and 74, the contact of the paper 100 with the print heads 73 and 74 is prevented. The rotation member 85 exerts an effect of performing the above operation, thereby enabling a beautiful borderless printing to be performed. Further, since the rotating member 85 having the horizontal rotation axis 87 has a rearwardly constricted shape, it is unlikely that the front end of the paper 100 passing through the paper feeding mechanism 2 abuts on the rotating member 85. There are advantages.

Other configurations of the printing apparatus are the same as those described with reference to FIG. 1 or FIG. 2, and therefore, in order to avoid repetition of description, the same portions are denoted by the same reference numerals, and detailed structural description is omitted.

In the embodiment described with reference to FIGS. 1 to 4, it is possible to mount the star wheel 81 on the carriage 6 so as to be located between the two ink cassettes 71 and 72, and FIG. In the embodiment described with reference to FIGS. 8A and 8B, it is also possible to attach the rotating member 85 to both the left and right sides of the carriage 6, and in such cases, the above-described operation, that is, The effect of preventing a situation in which the raised paper 100 comes into contact with the print heads 73 and 74 due to the floating of the paper 100 to cause paper stains is exhibited.

[0033]

[Effect of the invention]

 As described above, according to the present invention, the paper holding mechanism constituted by a star wheel, a rotating member, or the like prevents the lifting of the paper at a position opposed to the printing head that performs printing while moving in the left-right direction. This makes it possible to reliably prevent the paper whose rear end has come off the paper feed mechanism from coming into contact with the print head and causing paper stains. Will be possible.

In particular, in the present invention, since the additional paper pressing mechanism is attached to the carriage, it is not necessary to arrange many star wheels in the left and right direction as in the conventional printing apparatus described with reference to FIG. Regardless, it is possible to prevent the paper from coming into contact with the print head by suppressing the lifting of the paper at the location facing the print head. Therefore, the number of additional components such as a star wheel and a rotating member as a wheel body of the paper holding mechanism can be minimized, and an inexpensive printing apparatus can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a main part of a printing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic side view of a main part as viewed from the direction of arrow II in FIG.

FIG. 3A is a front view illustrating a paper pressing mechanism.
(B) is the same side view.

FIG. 4 is an operation explanatory view.

FIG. 5 is a schematic front view of a main part of a printing apparatus according to another embodiment of the present invention.

FIG. 6 is a schematic side view of a main part viewed from a direction of an arrow VI in FIG. 5;

FIG. 7 is an operation explanatory view.

FIG. 8 is a schematic perspective view illustrating a paper pressing mechanism.

FIG. 9 is an explanatory diagram of a main part of a conventional printing apparatus.

FIG. 10 is a schematic side view of another conventional printing apparatus.

[Explanation of symbols]

 Reference Signs List 2 paper feed mechanism 3 paper discharge mechanism 5 paper press mechanism 6 carriage 12 paper support surface 71, 72 ink cassette 73, 74 print head 81 star wheel 82 rotation axis 85 rotation member 86 pointed tooth 87 rotation axis 88 front end of rotation member 100 Paper

Claims (8)

[Utility model registration claims] An ink cassette provided with a print head is mounted above a sheet fed onto a sheet support surface, and a carriage reciprocates right and left to perform printing on the sheet. In a printing apparatus in which a paper discharge mechanism and a paper feed mechanism are separately arranged on both front and rear sides sandwiching a surface, a rear end of each of the left and right ends of the carriage presses a paper whose rear end is separated from the paper feed mechanism. Added paper holding mechanism to prevent paper from contacting the print head,
A printing apparatus, characterized in that the paper holding mechanism is a star wheel located at the front side of the print head and rotatably mounted on the carriage around a rotational axis in the front-rear direction. 2. An ink cassette provided with a print head is mounted above a sheet fed onto a sheet support surface, and a carriage reciprocates right and left to perform printing on the sheet. In a printing apparatus in which a paper discharge mechanism and a paper feed mechanism are separately arranged on both front and rear sides of a surface, two ink cassettes are mounted side by side on the carriage, and between the two ink cassettes. A paper pressing mechanism that presses the paper remote from the paper feeding mechanism to prevent the paper from contacting the print head, the paper pressing mechanism having the rotation axis parallel to the paper feeding direction, It is characterized in that it is a rotating member having a converging shape in which the pointed teeth are arranged in the circumferential direction, and a front end of the rotating member is located at a front side of the print head. Shaped apparatus. 3. An ink cassette provided with a print head is mounted above the paper fed onto the paper support surface, and a carriage reciprocates left and right to perform printing on the paper, and In a printing apparatus in which a paper discharge mechanism and a paper feed mechanism are separately arranged on both front and rear sides of a surface, a paper whose rear end is separated from the paper feed mechanism is pressed by the carriage, and the paper is pressed by the print head. A printing device characterized by adding a paper holding mechanism for preventing contact. 4. The printing apparatus according to claim 3, wherein the paper pressing mechanism is a ring attached to the carriage so as to be rotatable around a rotation axis in a front-rear direction. 5. The star wheel according to claim 4, wherein said wheel body is a star wheel.
The printing device described in 1. 6. The printing apparatus according to claim 5, wherein the ring body is provided at a position in front of the print head. 7. The printing apparatus according to claim 4, wherein the ring body has the rotation axis parallel to the sheet feeding direction, and is a rotating member having a tapered shape with pointed teeth arranged in a circumferential direction. 8. The printing apparatus according to claim 7, wherein a front end of the rotating member is located at a front side of the print head.