JP2013176866A - Printing apparatus - Google Patents

Printing apparatus Download PDF

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Publication number
JP2013176866A
JP2013176866A JP2012041233A JP2012041233A JP2013176866A JP 2013176866 A JP2013176866 A JP 2013176866A JP 2012041233 A JP2012041233 A JP 2012041233A JP 2012041233 A JP2012041233 A JP 2012041233A JP 2013176866 A JP2013176866 A JP 2013176866A
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JP
Japan
Prior art keywords
roll paper
holding
shaft
frame
printing
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Pending
Application number
JP2012041233A
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Japanese (ja)
Inventor
Hiroyoshi Okada
浩義 岡田
Original Assignee
Seiko Epson Corp
セイコーエプソン株式会社
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Priority to JP2012041233A priority Critical patent/JP2013176866A/en
Publication of JP2013176866A publication Critical patent/JP2013176866A/en
Pending legal-status Critical Current

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Abstract

A printing apparatus capable of replacing roll-shaped recording paper (roll paper) with an easy posture.
A printing apparatus (10) that prints information on a recording paper (12) fed from a roll paper (11) using a print head (21), and includes a roll paper shaft (40) on which the roll paper (11) is mounted and at least the print head (21). A main body frame 50, a roll paper holding base 42 that can be pulled out and pushed into the main body frame 50 and detachably mounted on the roll paper shaft 40, and an auxiliary roller 33 that assists in transporting the recording paper 12. The auxiliary roller 33 is retracted from the conveyance position 33a of the recording paper 12 in conjunction with the withdrawal of the roll paper holding table 42, and is rotated to the conveyance position 33a in conjunction with the pressing of the roll paper holding table 42. The roll paper shaft 40 is engaged by a roll paper shaft engaging portion 52 provided in the main body frame 50 when the roll paper holding base 42 is pushed in. Printing apparatus according to claim.
[Selection] Figure 1

Description

  The present invention relates to a printing apparatus.
  2. Description of the Related Art Conventionally, in a printing apparatus that prints information on roll-shaped recording paper (roll paper), a printing apparatus that supplies recording paper with large-diameter roll paper is known in order to improve the work efficiency of roll paper replacement. . Such a printing apparatus feeds the recording paper by rotating the roll paper shaft on which the roll paper is mounted. In addition, a certain tension may be applied to the fed recording sheet by an auxiliary roller that assists the conveyance of the recording sheet by the conveying roller. As a result, the load variation due to the inertia of the large-diameter roll paper is reduced and the conveyance of the recording paper is stabilized, thereby suppressing the printing position misalignment (see, for example, Patent Document 1).
JP 2008-49670 A
  However, in the above-described printing apparatus, the roll paper is heavy because of its large diameter, and the user has to hold the heavy roll paper in the axial direction of the roll paper shaft to replace the roll paper. . For this reason, there is a problem that it is difficult to exchange roll paper, such as forcing an unreasonable posture.
  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.
  (Application Example 1) A printing apparatus that prints information on a recording paper fed out from roll paper using a print head, the roll paper shaft on which the roll paper is mounted, a main body frame including at least the print head, A roll paper holding base that can be pulled out and pushed into the main body frame, and is detachably mounted on the roll paper shaft; and an auxiliary roller that assists in transporting the recording paper, and the auxiliary The roller is retracted from the transport position of the recording paper in conjunction with the pulling out of the roll paper holder, and is rotated to the transport position in conjunction with the pressing of the roll paper holder. The printing apparatus is characterized in that when the roll paper holding table is pushed in, it is engaged by a roll paper shaft engaging portion provided in the main body frame.
  According to this configuration, when replacing the roll paper, the replacement work can be performed by pulling out the roll paper holder. At this time, the auxiliary roller is retracted from the recording paper conveyance position located in the movement locus of the roll paper to be replaced in conjunction with the pulling out of the roll paper holding table. That is, the roll paper can be exchanged in a comfortable posture using a wide space.
  When the roll paper holder is pushed in, the roll paper shaft is engaged by a roll paper shaft engaging portion provided in the main body frame containing the print head. Therefore, it is possible to suppress the positional deviation between the print head and the roll paper. Accordingly, it is possible to suppress problems such as printing position misalignment.
  (Application Example 2) In the above-described printing apparatus, the roll paper shaft engaging portion is located between the outer surface of the roll paper shaft and the maximum outer diameter surface of the roll paper that can be accommodated in the printing device. The surface of the roll paper holding table is perpendicular to the pulling direction of the roll paper holding table, and is rotated in conjunction with the contact member adjacent surface provided on the roll paper holding table and the auxiliary roller with the drawing and pushing of the roll paper holding table. When the roll paper holding table is pulled out, a predetermined amount of gap is provided between the holding table contact member and the contact member adjacent surface in the pulling direction of the roll paper holding table. The printing apparatus according to claim 1, wherein rotation of the holding table contact member is stopped at a position having the holding position.
  According to this configuration, the contact member adjacent surface is located on the side where the roll paper shaft is positioned from the maximum outer diameter surface of the roll paper that can be accommodated in the printing apparatus. When exchanging the roll paper, a predetermined amount of gap is formed in the pulling direction of the roll paper holding table between the holding table contact member and the contact member adjacent surface. Thus, even when the user replaces the roll paper by holding the outer peripheral surface by hand, the roll paper can be exchanged without the obstruction of the holding table contact member and the contact member adjacent surface. In other words, it is possible to facilitate replacement of roll paper having a large outer diameter and heavy.
1 is a schematic configuration diagram illustrating a configuration of a printing apparatus according to a first embodiment. FIG. 3 is a schematic diagram illustrating a state in which a roll paper holding base included in the printing apparatus according to the first embodiment is stored in a main body frame. FIG. 6 is a schematic diagram illustrating a state in which a roll paper holding base provided in the printing apparatus according to the first embodiment and the second embodiment is pulled out with respect to a main body frame. FIG. 2 is a schematic perspective view illustrating an insertion portion at the leading end of a recording sheet provided in the printing apparatus according to the first embodiment.
(First embodiment)
Hereinafter, a first embodiment will be described with reference to the drawings. In the drawings referred to in the following description, the vertical and horizontal scales of members or parts may be shown differently from the actual ones for convenience of description and illustration.
(About the overall configuration of the printing device)
First, the overall configuration of the printing apparatus according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic configuration diagram illustrating a configuration of a printing apparatus.
  As shown in FIG. 1, the printing apparatus 10 includes a printing unit 20 that prints predetermined information on the recording paper 12, a conveyance unit 30 that conveys the recording paper 12, a main body frame 50 that includes at least the printing unit 20, A roll paper holding base 42 that accommodates the roll paper 11 and a control unit 92 that controls operations of the printing unit 20 and the conveyance unit 30 are provided.
  The printing unit 20 includes a print head 21 disposed on the recording surface side of the recording paper 12, and a platen 22 disposed so as to sandwich the recording paper 12 at a position facing the nozzle surface of the print head 21. Built in the main body frame 50.
  The print head 21 is, for example, a head mechanism including a nozzle that ejects ink, and sucks and ejects ink from an ink cartridge (not shown). The print head 21 performs printing based on the control data sent from the control unit 92. Of course, the printing method is not limited to ink, and may be other methods such as a thermal method and a dot impact method.
  The platen 22 has a role of regulating the position of the recording paper 12 to be printed.
  The transport unit 30 is configured to rotate the transport roller 31 that transports the recording paper 12, the transport driven roller 32 that is driven by the rotation of the transport roller 31, the auxiliary roller 33 that assists the transport of the recording paper 12, and the auxiliary roller 33. An auxiliary driven roller 34 to be driven, a recording paper guide plate 38 having a surface on which the back surface of the recording surface of the recording paper 12 slides, paper guides 39 disposed on both sides in the width direction of the recording paper 12, and a roll paper shaft 40.
  The transport roller 31 is rotatably supported by the main body frame 50. The conveyance roller 31 and the conveyance driven roller 32 are arranged so as to sandwich the recording paper 12. The auxiliary roller 33 is rotatably supported by an auxiliary roller support portion 35 a provided in an auxiliary roller support frame 35 rotatably supported by the main body frame 50. The auxiliary roller 33 and the auxiliary driven roller 34 are arranged so as to sandwich the recording paper 12. The auxiliary driven roller 34 is built in the cover 14 that can be opened and closed. When the cover 14 is opened, the auxiliary driven roller 34 moves (releases) away from the position where the recording paper 12 is sandwiched. When the cover 14 is closed, the auxiliary driven roller 34 holds the recording paper 12. Move to the clamping position.
  The recording paper guide plate 38 is incorporated in the main body frame 50 and has a role of regulating the position of the recording paper 12 being conveyed. The paper guide 39 is provided on the recording paper guide plate 38, is provided so as to sandwich the recording paper 12 with a predetermined gap in the width direction of the recording paper 12, and regulates the position of the conveyed recording paper 12 in the width direction. Have Here, the paper guide 39 may be capable of adjusting the position. Thereby, even when the width of the recording paper 12 changes due to the replacement of the roll paper 11, the recording paper 12 can be sandwiched with a predetermined gap from the recording paper 12, and the width of the conveyed recording paper 12 The position of the direction can be regulated.
  The roll paper shaft 40 is related to the accommodation of the roll paper 11 and will be described in detail later.
  The transport roller 31, the auxiliary roller 33, and the roll paper shaft 40 are rotationally driven by a driving unit (not shown) based on a control signal sent from the control unit 92 so as to perform a predetermined operation. The predetermined operation is not particularly limited. For example, the transport roller 31 and the auxiliary roller 33 may be rotationally driven, and the roll paper shaft 40 may not be rotationally driven, or all three of them may be rotationally driven. Also good. Here, the drive means (not shown) for driving the conveyance roller 31 to rotate is not particularly limited, and may be, for example, a means for driving the drive roller 31 through a reduction gear wheel train, or driving from the drive source via a belt. It may be a means to make it. The driving means (not shown) that rotationally drives the auxiliary roller 33 and the roll paper shaft 40 needs to be a means that allows the auxiliary roller 33 and the roll paper shaft 40 to be separated from the driving means. There are means for driving through a wheel train. Here, as the driving means (not shown), for example, a motor is preferably applied, and each of the driving means, the auxiliary roller 33, and the roll paper shaft 40 may have one, one, or any one of them. You may have for each combination.
  As a result, the recording paper 12 is unwound from the roll paper 11 and conveyed to the printing unit 20. The position of the auxiliary roller 33 at this time is a transport position 33a of the recording paper 12. Further, the rotation driving direction may be reversed so that the recording paper 12 can be conveyed in the direction opposite to the printing unit 20.
  The control unit 92 includes, for example, a CPU, a RAM, a ROM, and an interface circuit for communicating with a host device 90 such as a computer. Then, the CPU executes various processes by, for example, reading and executing a predetermined program from the ROM to the RAM. For example, the control unit 92 receives a print instruction from the host device 90, issues a print command to the printing unit 20 according to the instruction, and issues a request for transporting the recording paper 12 to the transport unit 30. The printing unit 20 executes print processing using the print head 21 in accordance with the print command. In the transport unit 30, the transport roller 31 and the like are rotationally driven as described above in accordance with the transport request, and the transport process of the recording paper 12 is performed.
(Regarding accommodation of roll paper)
The recording paper 12 is fed out from the roll paper 11 accommodated in a roll paper holding table 42 that can be pulled out and pushed into the main body frame 50. The roll paper 11 includes a roll paper shaft engaging portion 52 provided on the main body frame 50, a first pressing surface 42a provided on the roll paper holding table 42 on a surface orthogonal to the pulling direction of the roll paper holding table 42, Is attached to the roll paper shaft 40 that is rotatably engaged. Here, the roll paper shaft engaging portion 52 and the first pressing surface 42 a are arranged so as to sandwich the roll paper 11 in the width direction on both sides in the width direction of the roll paper 11. The roll paper shaft 40 is loaded with the roll paper 11 so that the ends of the roll paper shaft 40 protrude from both sides of the roll paper 11 in the width direction. Accordingly, the roll paper shaft 40 can be rotated so as to sandwich the roll paper 11 in the width direction by the roll paper shaft engaging portion 52 and the first pressing surface 42a arranged so as to sandwich the roll paper 11 in the width direction. Engaged.
  Here, a method in which the roll paper shaft 40 mounts the roll paper 11 is a method in which the roll paper shaft 40 and the roll paper 11 can rotate together. For example, there is a method of press-fitting with the outer diameter of the roll paper shaft 40 larger than the inner diameter of the core of the roll paper 11. Of course, other methods may be used.
  The roll paper holding table 42 is provided with drawer engagement portions (not shown) on both sides in the width direction of the roll paper 11, and the drawer engagement portions engage with drawer grooves (not shown) provided in the main body frame 50. Thus, the drawer groove serves as a guide for movement, and can be pulled out and pushed into the main body frame 50. Of course, other means may be used as the means for enabling the drawer and the push-in, for example, a cylindrical roller (not shown) that is rotatable on both sides in the width direction of the roll paper 11 of the roll paper holding base 42 and is provided. Or a means for rotating the roller on a guide surface provided on a pull-out rail (not shown) provided in the main body frame 50. Good. In the present embodiment, one-stage drawer is used, but two or more stages of drawer may be used. Further, the roll paper holder 42 may prevent the roll paper holder 42 from coming off from the main body frame 50.
  When the roll paper holding table 42 is pushed into the main body frame 50, the roll paper holding base 42 is stored in the main body frame 50. The roll paper holding table 42 is detachably mounted with the roll paper shaft 40, and moves the roll paper shaft 40 in accordance with the movement of the roll paper holding table 42. Therefore, the roll paper shaft 40 is pulled out from the main body frame 50 by pulling out the roll paper holding base 42 with respect to the main body frame 50. That is, the roll paper 11 supported on the roll paper shaft 40 can be replaced. Details will be described later with reference to FIGS.
  The configuration of the printing apparatus 10 described above is the main configuration in describing the features of the present embodiment, and is not limited to the above configuration. The configuration of the printing apparatus 10 is classified according to the main processing contents in order to facilitate understanding of the configuration. The present invention is not limited by the way of classification and names of the constituent elements. Depending on the processing content, it can be classified into more components. Moreover, it can also classify | categorize so that one component may perform more processes.
(About roll paper replacement)
Next, the replacement of the roll paper 11 will be described with reference to FIGS. 2 and 3, focusing on the pulling and pushing operations of the roll paper holding base 42 with respect to the main body frame 50.
  FIG. 2 is a schematic view showing a state in which the roll paper holding table 42 is stored in the main body frame 50. FIG. 3 is a schematic view showing a state in which the roll paper holding table 42 is pulled out with respect to the main body frame 50.
  As shown in FIG. 2, when the roll paper holding base 42 is stored in the main body frame 50, the roll paper shaft 40 includes the roll paper shaft engaging portion 52 and the first pressing surface 42a as described above. The roll paper 11 is supported so as to be rotatable. At this time, the roll paper holder 42 is engaged with the main body frame 50 by an engaging portion (not shown) and is fixed to the main body frame 50.
  The auxiliary roller support frame 35 is an “L” -shaped part that is rotatable about a support frame rotation shaft 36 provided in the main body frame 50, and is a holding base on the side opposite to the side that supports the auxiliary roller 33. A roller 37 as a contact member is rotatably supported. The position of the auxiliary roller support frame 35 in the rotational direction is determined with respect to the main body frame 50 by engaging the first engagement portion 56 provided in the main body frame 50 with the auxiliary roller support frame 35. Here, the first engaging portions 56 are arranged on both sides of the roll paper 11 in the width direction so as to sandwich the roll paper 11 in the width direction. Thereby, since the twist of the auxiliary roller support frame 35 can be prevented, the auxiliary roller support frame 35 can be positioned with high accuracy. That is, the auxiliary roller 33 supported by the auxiliary roller support frame 35 can be accurately positioned. The position of the auxiliary roller 33 at this time is the transport position 33a.
  The roller 37 is adjacent to a roller adjacent surface 42 d as a contact member adjacent surface provided on the roll paper holding table 42 on a surface orthogonal to the drawing direction of the roll paper holding table 42. Then, the auxiliary roller support frame 35 is rotated in the direction of rotating the roller 37 against the roller adjacent surface 42d by the support frame biasing spring 60 having one end connected to the auxiliary roller support frame 35 and the other end connected to the main body frame 50 ( It is biased in the pressing direction). Here, the roller 37 and the roller adjacent surface 42d may be disposed on both sides of the roll paper 11 in the width direction so as to sandwich the roll paper 11 in the width direction. Thereby, twisting of the auxiliary roller support frame 35 can be prevented.
  Here, the case where it pulls out with respect to the main body frame 50 of the roll paper holder 42 will be described. When the roll paper holder 42 is pulled out of the main body frame 50, first, the auxiliary driven roller 34 (FIG. 1) is released by opening the cover 14 (FIG. 1), and the recording paper 12 (FIG. 1) is printed. The recording paper 12 (FIG. 1) of the apparatus 10 (FIG. 1) is removed from the conveyance path.
  Thereafter, the engagement between the roll paper holding base 42 and the main body frame 50 at the engaging portion (not shown) is released, and the fixing of the roll paper holding base 42 and the main body frame 50 is released. Then, the roll paper holder 42 is pulled out in the direction of arrow A in FIG. Then, the roll paper shaft 40 moves away from the first pressing surface 42a and comes into contact with the second pressing surface 42b provided on the roll paper holding table 42 on a surface orthogonal to the pulling direction of the roll paper holding table 42, thereby holding the roll paper. It is pulled out together with the table 42. That is, the roll paper 11 supported by the roll paper shaft 40 is also pulled out together with the roll paper holding base 42. Here, the second pressing surface 42 b is disposed on both sides of the roll paper 11 in the width direction so as to sandwich the roll paper 11 in the width direction. Then, the roll paper holder 42 is pulled out with respect to the main body frame 50.
  As shown in FIG. 3, the roll paper 11 and the roll paper shaft 40 are pulled out with respect to the main body frame 50 together with the roll paper holding base 42. Thereby, the roll paper 11 and the roll paper shaft 40 can be taken in and out from the roll paper holding table 42. That is, the roll paper 11 can be replaced.
  The roll paper shaft 40 is provided on the roll paper holding base 42 so that the lower surface of the roll paper shaft 40 is mounted on the lower surface of the roll paper shaft 40 while the roll paper holding base 42 is being pulled out. It is mounted on the mounting surface 42c. When the roll paper 11 is put in and out, the roll paper shaft 40 is mounted on the shaft mounting surface 42c. Here, the shaft mounting surface 42c is disposed on both sides of the roll paper 11 in the width direction so as to sandwich the roll paper 11 in the width direction.
  The roll paper 11 is located at the roll paper feed position 11a before the roll paper holding base 42 is pulled out, that is, in the state shown in FIG. When the roll paper holding table 42 is pulled out, the roll paper 11 is drawn through the roll paper movement locus 11b. The roll paper movement locus 11b includes a transport position 33a where the auxiliary roller 33 is disposed before the roll paper holding base 42 is pulled out.
  Since the auxiliary roller support frame 35 is urged in the pressing direction, the auxiliary roller 33 rotates in conjunction with the drawing of the roll paper holding table 42 provided with the roller adjacent surface 42d. Therefore, the auxiliary roller 33 rotates in a direction away from the transport position 33a. Then, it retracts from the roll paper movement locus 11b. Thereby, the roll paper 11 can be pulled out without the presence of the auxiliary roller 33 becoming an obstacle.
  Here, the rotation of the auxiliary roller 33 is stopped at a fixed rotation amount by the engagement of the second engagement portion 58 provided in the main body frame 50 and the auxiliary roller support frame 35 supporting the auxiliary roller 33. To do. Therefore, the rotation of the roller 37 supported by the auxiliary roller support frame 35 is also stopped by the constant rotation amount. The fixed rotation amount is a rotation amount by which the auxiliary roller 33 can be retracted from the roll paper movement locus 11b and the height at which the roller 37 is positioned is within the range of the roller adjacent surface 42d.
  Next, a case where the roll paper holding table 42 is pushed into the main body frame 50 will be described. When the roll paper holding table 42 is pushed into the main body frame 50, the roll paper holding table 42 is pushed in the direction of arrow B in FIG. Then, the roll paper shaft 40 is separated from the second pressing surface 42 b, comes into contact with the first pressing surface 42 a, and is pushed together with the roll paper holding table 42. That is, the roll paper 11 supported by the roll paper shaft 40 is also pushed together with the roll paper holding base 42. Then, when the roll paper shaft 40 reaches the slope portion of the roll paper shaft engaging portion 52, the roll paper shaft 40 rises along the slope and moves away from the shaft mounting surface 42c. When the roll paper holding table 42 is further pushed in, the roll paper shaft engaging portion 52 and the first pressing surface 42a are rotatably engaged. At this time, the roll paper holder 42 is engaged with the main body frame 50 by an engaging portion (not shown) and is fixed to the main body frame 50.
  Further, the auxiliary roller support frame 35 rotates until the roller 37 comes into contact with the roller adjacent surface 42 d, and is interlocked with the pressing of the roll paper holding base 42 until it is engaged with the first engaging portion 56. That is, the auxiliary roller 33 supported by the auxiliary roller support frame 35 rotates to the transport position 33 a in conjunction with the pressing of the roll paper holding table 42. Then, the roll paper holder 42 is stored in the main body frame 50 (FIG. 2).
(Regarding the setting of the recording paper tip)
Next, the setting of the leading end of the recording paper 12 will be described with reference to FIG.
  FIG. 4 is a schematic perspective view showing an insertion portion at the leading end of the recording paper 12 provided in the printing apparatus 10.
  After setting the roll paper 11 on the main body frame 50 (FIG. 2), the recording paper 12 is pulled out from the roll paper 11. Then, the leading end of the recording paper 12 is brought to a position where the transport roller 31 and the transport driven roller 32 sandwich the recording paper 12 via the auxiliary roller 33, the recording paper guide plate 38, and the paper guide 39.
  Then, the control unit 92 (FIG. 1) detects the presence of the recording paper 12 from the output signal of the detector provided in the paper presence / absence detection unit 70 provided on the recording paper guide plate 38, and sends a conveyance command to the conveyance unit. 30 (FIG. 1). When the transport unit 30 (FIG. 1) receives the transport command, the transport roller 31 is rotationally driven. Thereby, the recording paper 12 is conveyed by the conveyance roller 31, and the recording paper 12 is set in the printing apparatus 10 (FIG. 1). At this time, a predetermined operation may be performed on the transport unit 30 (FIG. 1) to perform a cueing process of the recording paper 12 or the like. Here, the detector includes, for example, a light source and a sensor element, and the sensor element receives light reflected from the light of the light source and outputs a signal, or transmits the light of the light source to the object. In some cases, the sensor element receives the received light and outputs a signal.
  Then, by closing the cover 14 (FIG. 1), the auxiliary driven roller 34 (FIG. 1) is moved to a position where the recording paper 12 is sandwiched. As a result, the printing apparatus 10 (FIG. 1) can perform a printing operation on the recording paper 12.
Hereinafter, effects of the present embodiment will be described.
(1) The above-described roll paper holding table 42 can be pulled out from the main body frame 50 when the roll paper 11 is replaced. The roll paper shaft 40 on which the roll paper 11 is loaded is detachably mounted on the roll paper holding base 42. Therefore, the roll paper 11 can be pulled out from the main body frame 50 and the roll paper 11 can be replaced. At this time, the auxiliary roller 33 retreats from the transport position 33a of the recording paper 12 located in the roll paper movement locus 11b of the roll paper 11 to be replaced in conjunction with the pulling out of the roll paper holding table 42. That is, the roll paper can be exchanged in an easy posture using a wide space. Further, since the auxiliary roller 33 can be arranged without being restricted by the position of the roll paper movement trajectory 11b, the space in the printing apparatus 10 can be used effectively.
  (2) The roll paper shaft 40 described above is engaged by a roll paper shaft engaging portion 52 provided in the main body frame 50 when the roll paper holding base 42 is pushed into the main body frame 50. Therefore, it is possible to suppress the positional deviation between the print head 21 built in the main body frame 50 and the roll paper 11 supported by the roll paper shaft 40. Accordingly, it is possible to suppress problems such as printing position misalignment.
(Second Embodiment)
Here, the second embodiment will be described with reference to FIG. In addition, description is abbreviate | omitted about the content similar to 1st Embodiment.
  The roller adjacent surface 42d is located between the outer surface of the roll paper shaft 40 on the side where the roll paper shaft engaging portion 52 is located and the maximum outer diameter surface on which the roll paper 11 can be set. The roll paper holding table 42 is provided on a surface perpendicular to the pulling direction of the roll paper. When the roll paper holding table 42 is pulled out with respect to the main body frame 50, the rotation of the roller 37 is stopped by a fixed rotation amount as in the first embodiment. At this time, the rotation of the roller 37 is stopped at a position where a predetermined amount of gap is formed between the roller 37 and the roller adjacent surface 42d in the pulling direction of the roll paper holding table 42. Here, the predetermined amount is an amount that can secure a space where a user's hand can enter when replacing the roll paper 11.
Hereinafter, effects of the second embodiment will be described.
When the roll paper holding table 42 is pulled out from the main body frame 50, a predetermined amount of gap is formed between the roller 37 and the roller adjacent surface 42d in the pulling direction of the roll paper holding table 42. The roller adjacent surface 42d is provided on the side where the roll paper shaft 40 is positioned from the maximum outer diameter surface on which the roll paper 11 can be set. Therefore, even when the user replaces the roll paper 11 by holding the outer peripheral surface of the roll paper 11 by hand, the roll paper 11 can be replaced without obstructing the roller 37 or the roller adjacent surface 42d. It is. Therefore, it is possible to facilitate replacement of the roll paper 11 having a large outer diameter and heavy.
  As mentioned above, although the Example of this invention was described, various deformation | transformation can be added with respect to the said Example in the range which does not deviate from the meaning of this invention. For example, modifications other than the above embodiment are as follows.
(Modification)
Although the said Example demonstrated the case where the roller 37 supported rotatably by the auxiliary roller support frame 35 was employ | adopted as a holding stand contact member, it is not limited to this. The holding table contact member may be, for example, a shaft fixed without rotating. When the roller 37 is used, a support shaft for rotatably supporting the auxiliary roller support frame 35 is further required. However, since this modification does not require additional parts, the number of parts can be reduced and the cost can be reduced.
  DESCRIPTION OF SYMBOLS 10 ... Printing apparatus, 11 ... Roll paper, 12 ... Recording paper, 14 ... Cover, 20 ... Printing part, 21 ... Printing head, 22 ... Platen, 30 ... Conveying part, 31 ... Conveying roller, 32 ... Conveying driven roller, 33 ... Auxiliary roller 33a ... Transport position 34 ... Auxiliary driven roller 35 ... Auxiliary roller support frame 35a ... Auxiliary roller support part 38 ... Recording paper guide plate 39 ... Paper guide 40 ... Roll paper shaft 42 ... Roll Paper holding base, 42a ... first pressing surface, 50 ... main body frame, 52 ... roll paper shaft engaging portion, 90 ... host device, 92 ... control portion.

Claims (2)

  1. A printing apparatus that prints information on a recording paper fed from a roll paper using a print head,
    A roll paper shaft for mounting the roll paper;
    A main body frame containing at least the print head;
    A roll paper holding table that can be pulled out and pushed into the main body frame, and is detachably mounted on the roll paper shaft,
    An auxiliary roller for assisting the conveyance of the recording paper,
    The auxiliary roller is retracted from the conveyance position of the recording paper in conjunction with the drawer of the roll paper holding table, and is rotated to the conveyance position in conjunction with the pressing of the roll paper holding table.
    When the roll paper holder is pushed in, the roll paper shaft is engaged by a roll paper shaft engaging portion provided in the main body frame.
    A printing apparatus characterized by that.
  2. The printing apparatus according to claim 1,
    Orthogonal to the pulling direction of the roll paper holder, between the outer surface of the roll paper shaft on the side where the roll paper shaft engaging portion is located and the maximum outer diameter surface of the roll paper that can be accommodated in the printing apparatus A contact member adjacent surface provided on the roll paper holding table,
    A holding table contact member that rotates in conjunction with the pulling and pushing of the roll paper holding table together with the auxiliary roller;
    When the roll paper holding table is pulled out, the holding table contact member has a predetermined amount of gap in the pulling direction of the roll paper holding table between the holding table contact member and the contact member adjacent surface. The rotation stops,
    A printing apparatus characterized by that.
JP2012041233A 2012-02-28 2012-02-28 Printing apparatus Pending JP2013176866A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012041233A JP2013176866A (en) 2012-02-28 2012-02-28 Printing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012041233A JP2013176866A (en) 2012-02-28 2012-02-28 Printing apparatus

Publications (1)

Publication Number Publication Date
JP2013176866A true JP2013176866A (en) 2013-09-09

Family

ID=49269054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012041233A Pending JP2013176866A (en) 2012-02-28 2012-02-28 Printing apparatus

Country Status (1)

Country Link
JP (1) JP2013176866A (en)

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