JP2012218339A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer in which clogging of a nozzle of a print head due to paper powder produced in continuous paper feed holes can be prevented, and continuous paper can be aligned in the paper-feeding direction without printing for confirmation.SOLUTION: This printer includes the print head 7 discharging ink droplets toward continuous paper 2 with regularly-spaced feed holes 2a formed on both ends in paper width direction and a cover member 21 covering these feed holes 2a in the area to which the print head 7 is attached in the feeding direction of continuous paper 2. On the cover member 21, a reference position 35 is marked for aligning the continuous paper 2 in the feeding direction.

Description

  The present invention relates to a printer that performs printing by ejecting ink droplets onto continuous paper.

  2. Description of the Related Art Conventionally, there is known an ink jet printer that performs printing by ejecting ink droplets onto a continuous sheet in which feed holes are formed at predetermined intervals at both end portions in the paper width direction (see, for example, Patent Document 1). The ink jet printer described in Patent Document 1 includes a line head (print head) in which nozzles are formed in the entire area in the paper width direction, and ejects ink droplets from the line head to perform printing on continuous paper. In addition, the ink jet printer includes a tractor that engages with a continuous paper feed hole and conveys the continuous paper.

JP-A-2005-1303

  In the case of continuous paper in which feed holes are formed, paper dust tends to be generated from the feed holes. For this reason, in an ink jet printer that performs printing on continuous paper with feed holes formed, paper dust generated from the feed holes tends to clog the nozzles of the print head, and as a result, dot dropout occurs and print quality tends to deteriorate.

  In addition, when the continuous paper to be printed by the ink jet printer is, for example, preprinted paper on which a frame, a ruled line, or the like is preprinted, conventionally, a preprinted frame or the like, characters printed by the printer, and the like In order to prevent this deviation, confirmation printing (test printing) is performed in advance, and the deviation of the actual printing position from the target printing position is measured. In addition, the alignment of the continuous paper for correcting the deviation measured by the confirmation printing is performed. However, when confirmation printing for aligning continuous paper is performed, continuous paper and ink are wasted.

  Accordingly, an object of the present invention is to prevent the clogging of the nozzles of the print head due to paper dust generated in the continuous paper feed hole, and the continuous paper conveyance direction without performing confirmation printing. It is to propose a printer capable of aligning continuous paper in the printer.

  In order to solve the above problems, a printer according to the present invention includes a print head that ejects ink droplets toward a continuous sheet in which feed holes are formed at predetermined intervals at both end portions in the paper width direction, and at least the conveyance of the continuous sheet. A cover member that covers the feed hole in an installation area of the print head in the direction, and at least one of the cover members disposed on both ends in the paper width direction includes the continuous paper in the transport direction. A reference position for performing the alignment is marked.

  The printer of the present invention has a cover member that covers the feed hole at least in the print head installation region in the continuous paper conveyance direction. For this reason, the cover member can prevent the paper dust generated in the feed hole from rising toward the print head. Therefore, it is possible to prevent paper dust generated in the feed hole from adhering to the nozzles of the print head, and as a result, it is possible to prevent clogging of the nozzles of the print head due to the paper dust.

  In the present invention, the cover member is marked with a reference position for aligning the continuous sheet in the transport direction. Therefore, in the present invention, it is possible to perform alignment of continuous sheets in the transport direction with reference to the reference position marked on the cover member without performing confirmation printing. Therefore, for example, even if the continuous paper is pre-printed paper, it is possible to prevent a deviation between a pre-printed frame or the like and characters printed by the printer without performing confirmation printing. In the present invention, since the reference position is marked on the cover member that covers the continuous paper feed hole, the reference position is not covered by the continuous paper. Therefore, it is possible to perform the alignment of the continuous paper while confirming the reference position marked on the cover member, and the operation of aligning the continuous paper is facilitated.

  In the present invention, if the continuous paper discharge side in the transport direction is the downstream side, the reference position is marked at a position where the nozzles at the downstream end of the print head are arranged in the transport direction. Is preferred. That is, the reference position is preferably a print start position at which printing by the print head is started in the transport direction. With this configuration, the position of the continuous sheet in the transport direction is completed by aligning the position of the continuous sheet where printing is desired to start with the reference position marked on the cover member. Therefore, the operation for aligning continuous sheets is facilitated.

  In the present invention, it is preferable that the cover member is marked with a scale at a constant interval from the reference position. If comprised in this way, it will become possible to confirm easily the deviation | shift amount of the continuous paper with respect to a reference position. Further, if the continuous sheet is conveyed by a predetermined amount based on the confirmed deviation amount, the alignment of the continuous sheet is completed. Accordingly, it is possible to shorten the time required for alignment of continuous sheets.

  In the present invention, it is preferable that the scale marked every predetermined number is thicker and longer than the other scales. If comprised in this way, it will become possible to confirm the deviation | shift amount of the continuous paper with respect to a reference | standard position more easily.

  In the present invention, it is preferable that the reference position is marked on both of the cover members disposed on both ends in the paper width direction. If comprised in this way, it will become possible to perform alignment of a continuous paper accurately using the reference position marked on the both ends in the paper width direction.

  In the present invention, the cover member is preferably movable in the paper width direction. If comprised in this way, even if the width | variety of the continuous paper used with a printer is changed, it will become possible to cover a feed hole with a cover member by moving a cover member to a paper width direction. Therefore, even if the width of the continuous paper used in the printer is changed, it is possible to prevent clogging of the nozzles of the print head due to paper dust. Also, with this configuration, when the cover member is moved according to the paper width of the continuous paper, the cover member on which the reference position is marked covers the continuous paper. Therefore, it is possible to align the continuous paper while confirming the reference position overlapping the continuous paper, and it is easy to align the continuous paper.

1 is a perspective view of a printer according to an embodiment of the present invention. FIG. 2 is a schematic longitudinal sectional view showing a main part of the printer. The perspective view of the state which removed the housing from the printer shown in FIG. FIG. 2 is a schematic diagram illustrating a configuration of a printer in a printing area. The enlarged plan view of a movable side cover member and its peripheral part.

  Hereinafter, a printer to which the present invention is applied will be described with reference to the drawings.

(Overall printer configuration)
FIG. 1 is a perspective view of a printer 1 according to an embodiment of the present invention. FIG. 2 is a schematic longitudinal sectional view showing the main part of the printer 1. FIG. 3 is a perspective view of the printer 1 shown in FIG. 1 with the housing 5 removed.

  The printer 1 is a device that performs printing on the continuous paper 2. Sprocket holes (feed holes) 2 a are formed at regular intervals along the length direction of the continuous paper 2 at both ends of the continuous paper 2 in the paper width direction. The printer 1 includes a printer main body 3, a tractor 4 disposed at a rear portion of the printer main body 3 in the front-rear direction of the apparatus, and a casing 5 that covers the printer main body 3. In the printer 1, the continuous paper 2 is sent from the rear of the apparatus into the printer main body 3 by the tractor 4, and after printing is performed, the continuous paper 2 is discharged from the printer main body 3 to the front of the apparatus. That is, the front-rear direction of the apparatus is the conveyance direction of the continuous paper 2. Further, the front side of the apparatus from which the continuous paper 2 is discharged is the downstream side in the conveyance direction of the continuous paper 2. Further, the horizontal direction of the apparatus is the paper width direction of the continuous paper 2.

  Inside the printer main body 3, a paper transport path 6 through which the continuous paper 2 is transported is formed so as to extend linearly in the longitudinal direction of the apparatus. A print head 7 is arranged inside the printer body 3. The print head 7 is an ink jet head that ejects ink droplets toward the continuous paper 2, and the print head 7 has a plurality of nozzles that eject ink droplets. The print head 7 is disposed on the upper side of the paper conveyance path 6. The print head 7 is mounted on the carriage 8. The carriage 8 can be moved in the left-right direction of the apparatus by a driving force of a driving mechanism including a driving motor, a pulley, a belt, and the like.

  A plurality of divided platens 9 divided in the left-right direction of the apparatus are arranged inside the printer body 3. For example, five divided platens 9 are arranged inside the printer body 3. The divided platen 9 is disposed below the paper transport path 6. Further, the divided platen 9 and the print head 7 are arranged at substantially the same position in the front-rear direction of the apparatus. That is, as shown in FIG. 2, when viewed from the left-right direction of the apparatus, the divided platen 9 and the print head 7 are opposed to each other in the vertical direction with a predetermined gap therebetween. In the present embodiment, a print area P in which the print head 7 performs printing on the continuous paper 2 is defined by the plurality of divided platens 9. The print area P is an installation area of the print head 7 in the longitudinal direction of the apparatus.

  A paper feed roller 10 for supplying the continuous paper 2 to the printing area P is disposed between the printing area P and the tractor 4. A pressure roller 11 for pressing the continuous paper 2 against the paper feed roller 10 is in contact with the paper feed roller 10 from above. The pressing roller 11 is pressed against the paper feed roller 10 with a predetermined urging force. In front of the printing area P, a paper discharge roller 12 for discharging the printed continuous paper 2 is disposed. A pressure roller 13 for pressing the continuous paper 2 against the paper discharge roller 12 is in contact with the paper discharge roller 12 from above. The pressing roller 13 is pressed against the paper discharge roller 12 with a predetermined urging force.

  The tractor 4 is installed on each of both end sides in the apparatus left-right direction. The tractor 4 includes a tractor pin 15 that is inserted into the sprocket hole 2 a of the continuous paper 2. The tractor pins 15 are formed on the outer peripheral surface of the tractor belt 16 at regular intervals. The tractor belt 16 is bridged between a driving pulley 17 and a driven pulley 18. In this embodiment, the tractor 4 is movable in the left-right direction of the apparatus so that the continuous paper 2 having different paper widths can be conveyed and printed. However, when the paper width of the continuous paper 2 is changed, only the tractor 4 arranged on one side in the apparatus left-right direction is moved, and the tractor 4 arranged on the other side in the apparatus left-right direction is not moved. In the following description, the tractor 4 disposed on one side in the apparatus left-right direction is referred to as “tractor 4A”.

  At the center of the drive pulley 17, a square hole-shaped through hole that penetrates in the left-right direction of the device is formed. A drive shaft 19 that is rotated by the power of a drive motor (not shown) is inserted through the through hole. The drive shaft 19 is formed in a quadrangular prism shape. When the drive shaft 19 rotates, the drive pulley 17 also rotates together with the drive shaft 19. At the center of the driven pulley 18, a round hole-shaped guide hole penetrating in the left-right direction of the apparatus is formed. A cylindrical guide shaft 20 that guides the tractor 4A in the left-right direction of the apparatus is inserted into the guide hole. The driven pulley 18 is rotatable with respect to the guide shaft 20. The driven pulley 18 is movable in the left-right direction of the apparatus with respect to the guide shaft 20. The drive pulley 17 of the tractor 4A is movable in the apparatus left-right direction with respect to the drive shaft 19, and the drive shaft 19 also functions as a guide shaft for guiding the tractor 4A in the apparatus left-right direction.

  When the continuous paper 2 is conveyed by the tractor 4, the continuous paper 2 is set so that the tractor pin 15 is inserted into the sprocket hole 2a. Thereafter, the driving shaft 19 and the driving pulley 17 are rotated by the driving force of the driving motor to rotate the tractor belt 16, and the tractor pins 15 are sequentially engaged with the sprocket holes 2a to convey the continuous paper 2.

  In the printer 1, when printing on the continuous paper 2, a printing operation in which printing is performed by moving the print head 7 in a scanning direction orthogonal to the conveyance direction of the continuous paper 2 (that is, the horizontal direction of the apparatus), and the continuous paper 2 is performed. Are alternately performed with a paper feeding operation for feeding a predetermined amount.

(Printer configuration in the print area)
FIG. 4 is a schematic diagram illustrating the configuration of the printer 1 in the printing region P. FIG. 5 is an enlarged plan view of the movable-side cover member 21A and its peripheral part.

  As shown in FIG. 4, the printer 1 includes a cover member 21 that covers the sprocket hole 2 a from above in the printing region P. The cover member 21 is installed on each of both end sides in the left-right direction of the apparatus. The cover member 21 is disposed below the print head 7 when viewed from the left-right direction of the apparatus. Furthermore, the cover member 21 is disposed at a position that can be visually confirmed when the housing 5 is removed. In this embodiment, in order to cover the sprocket holes 2a of the continuous paper 2 having different paper widths, the cover member 21 arranged on one side in the apparatus left-right direction is movable in the apparatus left-right direction. On the other hand, the cover member 21 arranged on the other side in the apparatus left-right direction is fixed and does not move in the apparatus left-right direction.

  The cover member 21 is formed, for example, by bending a thin steel plate into a predetermined shape. The cover member 21 is formed with a cover portion 21a that covers the sprocket hole 2a from above. The cover portion 21a covers the entire sprocket hole 2a in the paper width direction from above. The cover portion 21a is formed so as to extend from the outside in the left-right direction of the apparatus toward the inside, and covers both end portions of the continuous paper 2 including the paper edge of the continuous paper 2 in the paper width direction.

  As shown in FIG. 5, a reference position 35 for aligning the continuous paper 2 in the front-rear direction of the apparatus is marked on the upper surface of the cover portion 21a of the cover member 21 arranged at both ends in the left-right direction of the apparatus. Yes. The reference position 35 is a straight line extending in the left-right direction of the apparatus. The reference position 35 is marked on the front end side of the cover portion 21a in the apparatus front-rear direction. Specifically, the reference position 35 is marked at a position where the nozzles 7a at the front end of the print head 7 are arranged in the front-rear direction of the apparatus. That is, the reference position 35 of the present embodiment is a print start position at which printing by the print head 7 is disclosed in the longitudinal direction of the apparatus. Further, on the upper surface of the cover portion 21a, scales 36 are marked at regular intervals from the reference position 35 to both sides in the apparatus front-rear direction. The reference position 35 and the scale 36 are marked from the inner end surface 21b of the cover portion 21a in the left-right direction of the apparatus toward the outside in the left-right direction of the apparatus. The reference position 35 and the scale 36 are marked by silk screen printing, for example.

  The scale 36 includes a large scale 36a marked every four lines and a small scale 36b marked between the large scales 36a. The large scale 36a is thicker and longer than the small scale 36b. The thickness of the reference position 35 is equal to the thickness of the large scale 36a, and the length of the reference position 35 is equal to the length of the large scale 36a. The scale 36 is marked with a 1 mm pitch, for example. That is, the large scale 36a is marked with a pitch of 5 mm, and the small scale 36b is marked with a 1 mm pitch between the large scales 36a.

  A fixed-side cover member 21 (hereinafter referred to as a cover member 21B) arranged on the other side in the left-right direction of the apparatus supports the end of the continuous paper 2 in the paper width direction from below as shown in FIG. It is fixed to the upper surface of the member 22. The support member 22 is fixed to the frame of the printer 1. The upper surface of the inner portion of the support member 22 in the left-right direction of the apparatus is one divided platen 9 out of the five divided platens 9.

  A movable-side cover member 21 (hereinafter referred to as a cover member 21A) disposed on one side in the left-right direction of the apparatus is fixed to the upper surface of a support member 24 that supports an end of the continuous paper 2 in the paper width direction from below. ing. The upper surface of the inner portion of the support member 24 in the left-right direction of the apparatus is one divided platen 9 out of the five divided platens 9. In addition, inclined portions 24a are formed on both ends of the support member 24 in the left-right direction of the apparatus so that the width of the support member 24 in the left-right direction of the apparatus decreases as it goes downward.

  The tractor 4 </ b> A and the cover member 21 </ b> A are connected by a connecting member 27. Specifically, the tractor 4 </ b> A and the support member 24 are connected by a connecting member 27. Therefore, the tractor 4A and the cover member 21A move in the left-right direction of the apparatus in conjunction with each other.

  As described above, a part of the support member 22 is one divided platen 9 out of the five divided platens 9, and a part of the support member 24 is included in the five divided platens 9. One divided platen 9 is provided. The remaining three divided platens 9 are held by holding members 30 arranged at predetermined intervals in the left-right direction of the apparatus. The divided platen 9 (hereinafter referred to as a divided platen 9A) held by the holding member 30 is movable relative to the holding member 30 in the vertical direction. Further, the divided platen 9 </ b> A is urged upward by the compression coil spring 31. On the upper end side of the divided platen 9A, there is formed an inclined surface 9c that is inclined so that the width of the divided platen 9A in the left-right direction of the apparatus decreases as it goes upward.

  When the paper width of the continuous paper 2 used in the printer 1 is changed, the user grasps a predetermined portion of the tractor 4A and moves the tractor 4A in the left-right direction of the apparatus. When the tractor 4A moves in the apparatus left-right direction, the cover member 21A also moves in the apparatus left-right direction together with the support member 24. For example, when the cover member 21A moves toward the other in the left-right direction of the apparatus (toward the cover member 21B), the inclined portion 24a of the support member 24 and the inclined surface 9c of the divided platen 9A come into contact with each other. As shown in B), the divided platen 9 </ b> A retracts downward against the urging force of the compression coil spring 31. In this state, when the cover member 21A moves toward one side in the left-right direction of the apparatus, the retracted divided platen 9A is raised by the urging force of the compression coil spring 31 as shown in FIG.

(Main effects of this embodiment)
As described above, the printer 1 according to this embodiment includes the cover members 21A and 21B that cover the sprocket hole 2a from the upper side in the printing region P. Therefore, it is possible to prevent the paper dust generated in the sprocket hole 2a from flying up toward the print head 7 by the cover members 21A and 21B. Accordingly, it is possible to prevent the paper dust generated in the sprocket hole 2a from adhering to the nozzles of the print head 7, and as a result, it is possible to prevent clogging of the nozzles of the print head 7 due to the paper dust. become.

  In this embodiment, the cover member 21A is movable in the left-right direction of the apparatus. Therefore, when the paper width of the continuous paper 2 used in the printer 1 is changed, the cover member 21 </ b> A can be moved in the paper width direction according to the paper width of the continuous paper 2. That is, even if the paper width of the continuous paper 2 to be used is changed, the sprocket hole 2a can be covered by the cover member 21A. Therefore, in this embodiment, even if the paper width of the continuous paper 2 to be used is changed, it is possible to prevent paper dust generated in the sprocket holes 2a from adhering to the nozzles of the print head 7, and as a result, It is possible to prevent clogging of the nozzles of the print head 7 due to paper dust.

  In this embodiment, a reference position 35 for aligning the continuous paper 2 in the front-rear direction of the apparatus is marked on the upper surface of the cover portion 21a. Therefore, it is possible to align the continuous paper 2 in the front-rear direction of the apparatus using the reference position 35 marked on the cover portion 21a as a guide without performing confirmation printing. For example, when the continuous paper 2 is pre-printed paper and the frame 2b pre-printed on the continuous paper 2 is to be aligned with the reference position 35, the continuous paper fed to the printing area P as shown in FIG. If the second frame 2b is on the rear side of the apparatus by the distance L1 from the reference position 35, the continuous paper 2 can be conveyed to the front side of the apparatus by the distance L1 and the frame 2b can be aligned with the reference position 35. Therefore, in this embodiment, when the continuous paper 2 is a preprinted paper, it is possible to prevent a deviation between the preprinted frame 2b and the characters printed by the print head 7 without performing confirmation printing. It becomes possible.

  Further, for example, when it is desired to align the leading edge 2c of the continuous paper 2 with the reference position 35, the leading edge 2c of the continuous paper 2 fed to the printing area P is only a distance L2 from the reference position 35 as shown in FIG. If it is on the rear side of the apparatus, the continuous paper 2 can be transported to the front side of the apparatus by a distance L2, and the leading edge 2c can be aligned with the reference position 35. Alternatively, when it is desired to align the leading edge 2c of the continuous paper 2 with the reference position 35, if the leading edge 2c of the continuous paper 2 fed to the printing area P is on the front side of the apparatus with respect to the reference position 35, the continuous paper 2 is moved to the rear of the apparatus. The tip 2c can be adjusted to the reference position 35 by being conveyed to the side. As described above, in this embodiment, it is possible to align the continuous paper 2 in the front-rear direction of the apparatus without performing confirmation printing, and thus it is possible to avoid unnecessary consumption of the continuous paper 2 and ink. Become.

  In this embodiment, the reference position 35 and the scale 36 are marked on the upper surface of the cover portion 21a of the cover members 21A and 21B. However, when the continuous paper 2 is aligned, the upper surface of the cover portion 21a of the cover member 21A. A reference position 35 and a scale 36 marked on are used.

  In this embodiment, the reference position 35 is a print start position at which printing by the print head 7 is disclosed in the longitudinal direction of the apparatus. Therefore, the alignment of the continuous paper 2 in the front-rear direction of the apparatus is completed by matching the position of the continuous paper 2 where printing is desired to start with the reference position 35. For example, when the continuous paper 2 is a preprinted paper, the alignment is completed by aligning the frame 2 b of the continuous paper 2 with the reference position 35. Therefore, in this embodiment, the alignment operation of the continuous paper 2 is facilitated. For example, after the leading edge 2c of the continuous paper 2 is aligned with the reference position 35, the predetermined amount of the continuous paper 2 is conveyed to the front side of the apparatus by transferring the continuous paper 2 by a predetermined amount. You may match the position you want to start.

  In this embodiment, scales 36 are marked on the upper surface of the cover portion 21a at regular intervals from the reference position 35. Therefore, it is possible to easily check the amount of deviation of the continuous paper 2 with respect to the reference position 35. Particularly in this embodiment, the large scale marks 36a marked every four lines are thicker and longer than the small scale marks 36b marked between the large scale marks 36a. It can be confirmed more easily. If the continuous paper 2 is conveyed by the confirmed deviation amount, the alignment of the continuous paper 2 is completed. Therefore, in this embodiment, it is possible to reduce the time required for alignment of the continuous paper 2.

  In this embodiment, a reference position 35 and a scale 36 are marked on the cover portion 21a that covers the sprocket hole 2a of the continuous paper 2 from above. Therefore, the reference position 35 and the scale 36 are not covered with the continuous paper 2. In this embodiment, the cover member 21 </ b> A moves in the left-right direction of the apparatus according to the paper width of the continuous paper 2, so that the reference position 35 and the scale 36 marked on the cover portion 21 a overlap the upper side of the continuous paper 2. Therefore, in this embodiment, it is possible to align the continuous paper 2 while confirming the reference position 35 and the scale 36 that overlap the upper side of the continuous paper 2, and as a result, it is easy to align the continuous paper 2. become.

(Other embodiments)
In the embodiment described above, the reference position 35 is marked at the position where the nozzles 7a at the front end of the print head 7 are arranged in the longitudinal direction of the apparatus, but the reference position 35 is the print head 7 in the longitudinal direction of the apparatus. The nozzles 7a may be marked at positions shifted from the positions where the nozzles 7a are arranged. In this case, when the continuous paper 2 is aligned using the reference position 35 as a guide, the position where the nozzles 7a of the print head 7 are arranged matches the position on the continuous paper 2 where printing is desired to start. If so, printing may be started as it is. In addition, when the continuous paper 2 is aligned using the reference position 35 as a guideline, the position where the nozzles 7a of the print head 7 are arranged and the position on the continuous paper 2 where printing is desired to start are shifted. For example, a predetermined amount of the continuous paper 2 may be conveyed, and printing may be started after the position where the nozzles 7a of the print head 7 are arranged and the position of the continuous paper 2 where printing is desired to start.

  In the above-described embodiment, the continuous paper 2 is aligned using the reference position 35 and the scale 36 marked on the cover portion 21a of the cover member 21A, but the cover portion 21a of the cover members 21A and 21B is aligned with the cover portion 21a. Using the marked reference position 35 and scale 36, the alignment of the continuous paper 2 may be performed. In this case, it is possible to accurately align the continuous paper 2 using the reference position 35 and the scale 36 that are marked on both ends in the left-right direction of the apparatus.

  In the embodiment described above, the reference position 35 and the scale 36 are marked on the upper surface of the cover portion 21a of the cover member 21 disposed on each of the both end sides in the left-right direction of the apparatus. The reference position 35 and the scale 36 may be marked only on the upper surface of the cover portion 21a of the cover member 21 disposed on the surface. Further, in the embodiment described above, the large scale 36a is marked every four lines, but for example, the large scale 36a may be marked every nine lines. Moreover, in the form mentioned above, although the scale 36 is comprised from the large scale 36a and the small scale 36b, the scale 36 may be comprised only from the large scale 36a, and is comprised only from the small scale 36b. Also good. Further, the scale 36 may not be marked on the upper surface of the cover portion 21a.

  DESCRIPTION OF SYMBOLS 1 ... Printer, 2 ... Continuous paper, 2a ... Sprocket hole (feed hole), 7 ... Print head, 7a ... Nozzle, 21 ... Cover member, 35 ... Reference position , 36 ... scale, P ... print area (print head installation area)

Claims (6)

A print head that ejects ink droplets toward a continuous sheet in which feed holes are formed at predetermined intervals on both ends in the paper width direction;
A cover member that covers at least the feed hole in an installation area of the print head in the conveyance direction of the continuous paper,
The printer according to claim 1, wherein a reference position for aligning the continuous paper in the transport direction is marked on at least one of the cover members disposed on both ends in the paper width direction. When the discharge side of the continuous paper in the transport direction is the downstream side,
The printer according to claim 1, wherein the reference position is marked at a position where the nozzles on the downstream side of the print head are arranged in the transport direction.   The printer according to claim 1, wherein the cover member is marked with a scale at a constant interval from the reference position.   The printer according to claim 3, wherein the graduations marked every predetermined number are thicker and longer than the other graduations.   5. The printer according to claim 1, wherein the reference position is marked on both of the cover members disposed on both ends in the paper width direction. 6.   The printer according to claim 1, wherein the cover member is movable in the paper width direction.

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