JP5798854B2 - Printer - Google Patents

Description

  The present invention relates to a printer that performs printing on a recording paper drawn from roll paper.

  Many types of printers that print on recording paper drawn from roll paper, such as thermal printers, are currently known. The roll paper used in this type of printer is rotatably housed inside the housing and can be taken in and out through an open / close door. In addition, the recording paper drawn from the roll paper is fed through a predetermined transport path, and after printing is performed, the recording paper is discharged from the discharge port.

  By the way, the roll paper is mainly an external winding type in which the printing surface (including the heat-sensitive surface) of the recording paper faces outward, but it is wound so that the printing surface faces inward. The inner winding type is also known, and it is properly used according to the application. However, the outer winding type and the inner winding type have different transport paths for the recording paper to be fed due to the fact that the orientation of the printing surface is reversed.

  Therefore, in general, printers that use roll paper are often designed for both types. For example, a printer described in Patent Document 1 is known as a printer compatible with an outer roll type roll paper. As described above, the design for exclusive use of the inner winding type or the outer winding type makes it possible to make the recording paper conveyance path constant, and prevents printing paper from rubbing, increasing the conveyance resistance, etc. Is difficult to occur.

  On the other hand, dual-purpose printers that are designed for both outer and inner roll types are also known. According to this dual-purpose printer, any type of roll paper can be suitably used, and is therefore convenient.

JP 2005-96433 A

By the way, due to the characteristics of the roll paper, the winding may be loosened inside the printer, and the drawn recording paper may be loosened. In particular, when the roll diameter is large and the weight is large, the winding is easy to loosen due to the inertia at the time of rotation, and the recording paper is easy to loosen. When unused roll paper was set, the above inconvenience was more likely to occur.
When the slack of the recording paper occurs as described above, this slack begins to be gradually eliminated with the start of printing, but when the slack is eliminated, the recording paper is suddenly tensioned and tensioned. End up. For this reason, the conveyance torque suddenly increases, and it is difficult to feed the recording paper with a uniform conveyance torque, which easily causes printing defects such as uneven printing.

  Therefore, as one of the methods for suppressing the slack of the recording paper, for example, a method for suppressing the slack of the recording paper by adding a mechanism for imparting rotational resistance to the mechanism for supporting the roll paper and making the roll paper difficult to loosen. It has been known. However, with this method, the structure is easily complicated and complicated, and it is likely to be accompanied by a large design change. In addition, it is not suitable for the drop-in method in which the roll paper is simply put into the housing, rather than the method in which the roll paper is pivotally supported.

  Furthermore, in the above combined printer, the roll path of the roll of recording paper is different because the transport path of the drawn recording paper differs depending on whether the outer roll type roll paper is used or the inner roll type roll paper is used. Depending on the type of recording paper, the length of the recording paper pulled out will differ. Therefore, even if the same rotational resistance is applied to the roll paper, it is difficult to reliably suppress the slack of the recording paper.

  The present invention has been made in view of such circumstances, and the object thereof is to provide a simple configuration and appropriately prevent the recording paper from slackening regardless of whether the roll paper is an outer winding type or an inner winding type. It is an object of the present invention to provide a printer capable of performing printing clearly while suppressing.

The present invention provides the following means in order to solve the above problems.
(1) The printer according to the present invention includes either an inner roll paper in which the recording paper is wound with the print surface facing inward or an outer roll paper in which the recording paper is wound with the print surface facing outward. A housing that contains the roll paper, a discharge port that discharges the recording paper drawn from the roll paper, and the housing that is combined with the housing and received in the housing A printing module that prints on the recording paper drawn from the roll paper and discharges the printed recording paper from the discharge port, and the printing module communicates the discharge port with the accommodating portion. A recording paper path, a platen roller that feeds the recording paper toward the discharge port through the recording paper path, and a print head that performs printing on the printing surface of the recording paper that is fed. In the housing, There is provided a tension applying unit that applies tension to the recording paper until the recording paper drawn from the roll paper stored in the recording storage unit is inserted into the insertion port of the recording paper passage. The tension applying unit presses the recording paper drawn from the inner roll paper, and presses the recording paper drawn from the outer roll paper. And a second tension applying unit that applies tension by doing so.

  According to the printer of the present invention, regardless of whether the inner roll paper or the outer roll paper is stored in the storage section, the drawn recording paper is inserted into the recording paper path from the common insertion port. And can be led to a common outlet through the passage. Therefore, the recording paper that has been printed by the print head can be taken out from the same discharge port, which is easy to use. In addition, since it is not necessary to separately provide a discharge port or the like corresponding to each of the inner roll paper and the outer roll paper, it is easy to reduce the size by simplifying the configuration.

By the way, when the inner roll paper is used and when the outer roll paper is used, the conveyance path until the drawn recording paper is inserted into the common insertion port of the recording paper path is different. The length of the recording paper that is pulled out also differs.
Here, when the inner roll paper is used, the first tension applying unit presses the recording paper pulled out from the roll paper with a force according to the length or the like, so that the optimum tension for the recording paper is obtained. It is possible to prevent the slack from occurring. On the other hand, when the outer roll paper is used, the second tension applying unit presses the recording paper drawn from the roll paper with a force according to the length or the like, so that the optimum tension is applied to the recording paper. It can be applied and the occurrence of slack can be suppressed.

As described above, regardless of whether the inner roll paper or the outer roll paper is used, the optimum tension according to each roll paper can be applied to the recording paper, and slack can be suppressed. Accordingly, it is possible to feed the recording paper with a constant conveyance torque, and it is possible to perform clear printing without causing printing defects such as printing unevenness.
In addition, since the first tension applying unit and the second tension applying unit may be provided at a position until the drawn recording paper is inserted into the insertion port of the recording paper passage, the degree of freedom in design is high. In addition, it is easy to simplify the configuration.

(2) In the printer according to the present invention, the first tension applying unit and the second tension applying unit extend to the outside of the insertion port along the recording paper in the insertion port and the recording paper path. The conveyance direction of the recording paper fed toward the insertion port may be changed so that the insertion angle formed by the virtual insertion surface is within a predetermined angle range.

  In this case, the first tension applying unit and the second tension applying unit not only apply tension by pressing the recording paper, but the insertion angle of the recording paper passage into the insertion port is within a predetermined angle range. The recording paper transport direction is changed so as to be within the range. Therefore, even if the recording paper transport path differs depending on the inner roll paper or the outer roll paper, the recording paper can be smoothly inserted into the recording paper path with little resistance. Accordingly, it is easy to reduce the conveyance resistance, and it is possible to suppress the occurrence of paper jam or the like.

(3) In the printer according to the present invention, the first tension applying unit and the second tension applying unit are configured such that at least a portion that presses the recording paper is swingable in a paper feeding direction of the recording paper. May be.

In this case, since at least the pressing portion that contacts the recording paper is swingable in the paper feeding direction, the recording paper is swung (tilted) with the recording paper fed while pressing the recording paper. As a result, the recording paper can be fed without causing local bending or the like as much as possible. Therefore, the recording paper conveyance load can be reduced.
In particular, at the starting stage when the recording paper starts to be fed, the pressing portion swings with the recording paper, so that the recording paper can be smoothly guided in the transport direction. For this reason, it is possible to effectively reduce the conveyance load, and it is possible to suppress an increase in the conveyance torque at the start-up stage, and it is easy to prevent printing defects such as printing unevenness.
Further, since the pressing portion can be moved over a wide range by swinging, even if the roll diameter of the roll paper changes (changes from a large diameter to a small diameter), the recording paper can be stably and easily contacted. Therefore, it is possible to suppress the slackness of the recording paper in a wide diameter range.

(4) In the printer according to the present invention, the first tension applying unit and the second tension applying unit are formed along a paper width direction of the recording paper, and a pressing body whose tip is in contact with the recording paper An elastic portion that urges the pressing body to press the tip of the pressing body against the recording paper, and the elastic portion pushes the pressing body in the paper feeding direction of the recording paper. You may elastically support so that rocking is possible.

  In this case, since the elastic portion supports the pressing body in a swingable manner, when the printing is stopped, the pressing body inclined in the paper feeding direction is swung in the reverse direction by its own elastic restoring force, and the original is moved. It can be naturally returned to the position. Therefore, even if printing is restarted after that, it is possible to repeatedly suppress an increase in conveyance torque at the start of paper feeding.

(5) In the printer according to the present invention, a guide hole through which a guide shaft is inserted is formed at a proximal end portion of the pressing body, and the guide shaft guides the pressing body in a biasing direction. A gap that restricts the amount of movement of the pressing body in the urging direction and allows the pressing body to swing may be defined between the guide hole and the guide shaft.

In this case, the pressing body urged by the elastic portion moves along the guide shaft while being guided by the guide shaft. Therefore, the pressing body can be accurately biased in a desired direction, and the recording paper can be pressed more stably. In addition, since the guide shaft regulates the amount of movement of the pressing body urged by the elastic portion, the recording paper can be pressed with an appropriate pressing force, and an optimum tension can be easily applied.
Since the gap is defined between the guide shaft and the guide hole, the swinging of the pressing body is not restricted.

(6) In the printer according to the present invention, in the housing, the recording paper pulled out from the roll paper stored in the storage unit is inserted into the insertion port until the recording paper is inserted into the insertion port. A guide portion that guides the recording paper from the width direction is provided, and the guide portion guides the recording paper drawn from the inner roll paper, and the guide paper that is drawn from the outer roll paper. And a second guide portion for guiding the recording paper.

  In this case, since the recording paper can be guided from the width direction regardless of whether the inner roll paper or the outer roll paper is used, the recording paper is not inserted until it is inserted into the recording paper path. It becomes difficult to run illegally such as meandering and skewing. Accordingly, printing misalignment, paper jam, and the like are less likely to occur.

(7) In the printer according to the invention, the first tension applying unit or the second tension applying unit may be detachable from the inside of the housing.

  In this case, it is possible to easily replace both tension members as appropriate according to the situation such as wear and the like, and it is possible to improve the maintainability and simultaneously use the printer for a long time. Also, depending on the situation such as the roll diameter and the type of roll paper, any tension applying part can be removed, so that the internal space of the housing can be widened, for example, roll paper can be taken in and out of the housing. It becomes easy to do. Therefore, it is easy to use and can improve convenience.

(8) In the printer according to the present invention, at least a portion that presses the recording paper is formed of a metal material or a resin material containing a reinforcing fiber in the first tension applying unit and the second tension applying unit. And may be formed to have a convex curved surface toward the recording paper.

  In this case, since the pressing portion that comes into contact with the recording paper is formed of a metal material or a resin material containing reinforcing fibers, the frictional resistance is difficult to wear. Therefore, generation | occurrence | production of abrasion powder etc. can be suppressed and it is hard to invite the printing defect etc. resulting from this. Further, since the pressing portion is formed to have a convex curved surface toward the recording paper, it is easy to press the recording paper with an equal force and to easily slide the recording paper. Therefore, it is easy to further reduce the conveyance resistance and it is difficult to rub or scratch the recording paper.

(9) In the printer according to the present invention, each of the first tension applying unit and the second tension applying unit is a roller unit in which a portion that presses the recording paper is rotatable in the paper feeding direction of the recording paper. May be.

  In this case, since the pressing portion that contacts the recording paper is a roller portion that rotates as the recording paper is fed, it is easy to press the recording paper with equal force, and the recording paper is difficult to slide. Therefore, the contact resistance with respect to the recording paper can be minimized. Therefore, it is easy to effectively reduce the conveyance resistance, and it is difficult to rub or scratch the recording paper.

(10) In the printer according to the present invention, the pressing portion may be formed of a metal material or a resin material containing a reinforcing fiber.

  In this case, since the pressing portion as the roller portion is formed of a metal material or a resin material containing reinforcing fibers, it is difficult to wear strongly against frictional resistance. Therefore, generation | occurrence | production of abrasion powder etc. can be suppressed and it can be made hard to invite the printing defect etc. resulting from this.

  According to the printer of the present invention, it is possible to print clearly with a simple configuration while appropriately suppressing slackness of the recording paper, regardless of whether the roll paper is of the outer winding type or the inner winding type.

1 is a diagram illustrating an embodiment according to the present invention, and is an external perspective view of a thermal printer. FIG. It is a perspective view which shows the state which opened the printer cover from the state shown in FIG. It is a longitudinal cross-sectional view of the thermal printer shown in FIG. Note that the recording paper is not pulled out. FIG. 3 is a perspective view in a state where a printer cover shown in FIG. 2 is removed. It is a longitudinal cross-sectional view of the thermal printer in a state in which the inner roll paper is set. It is a longitudinal cross-sectional view of the thermal printer in a state where outer roll paper is set. FIG. 6 is an enlarged view of the periphery of a recording paper path in the state shown in FIG. 5. FIG. 7 is an enlarged view of the periphery of a recording paper path in the state shown in FIG. 6. It is a figure which shows the modification which concerns on this invention, Comprising: It is a perspective view in the state which removed the printer cover. It is a figure which shows another modification concerning this invention, Comprising: It is a perspective view in the state which removed the printer cover. It is a figure which shows another modification which concerns on this invention, Comprising: It is a perspective view in the state which removed the printer cover. It is AA sectional drawing shown in FIG. FIG. 12 is a cross-sectional view illustrating a state immediately before the pressing body swings in a state where the recording paper is pressed by the first tension applying unit illustrated in FIG. 11. FIG. 14 is a cross-sectional view showing a state where the pressing body swings in the paper feeding direction after the state shown in FIG. 13.

  Embodiments of a printer according to the present invention will be described below with reference to the drawings. In the present embodiment, a thermal printer used in a POS cash register system or the like will be described as an example of a printer.

(Configuration of thermal printer)
As shown in FIGS. 1 to 3, the thermal printer 1 of the present embodiment includes an inner roll paper R <b> 1 on which a recording paper (thermal paper) P is wound with a printing surface (thermal surface) P <b> 1 facing inward, and The printer is compatible with both the outer roll paper R2 around which the recording paper P is wound with the print surface P1 facing outward, and printing is performed on the recording paper P drawn from one of the roll papers R1 and R2. It is possible to do.
Hereinafter, when simply referred to as roll paper, it refers to both roll paper of inner roll paper R1 and outer roll paper R2, and is referred to as roll paper R.

The thermal printer 1 includes a substantially box-shaped casing (housing) 4 including a casing body 2 and a printer cover 3, and a printing module 5 combined with the casing 4.
The casing body 2 and the printer cover 3 are formed of, for example, a resin material, a metal material, or a combination thereof, and either the inner roll paper R1 or the outer roll paper R2 is accommodated in the casing body 2. A storage container (storage unit) 10 is provided.

  In the present embodiment, the front-rear direction L1 and the up-down direction L2 are defined in the state shown in FIG. That is, the upper side is the upper side and the lower side is the lower side. The side on which the printer cover 3 is provided is the front side, and the opposite side is the rear side. Further, a direction orthogonal to the front-rear direction L1 and the up-down direction L2 is defined as a left-right direction L3.

  As shown in FIGS. 2 and 3, an inner space S <b> 1 that opens forward and stores the container 10 is defined inside the casing body 2. The internal space S1 includes a bottom wall portion 2a, a back wall portion 2b located on the rear side, an internal top wall portion 2c connected to the upper end portion of the back wall portion 2b, and a pair of faces facing the left-right direction L3. And an inner side wall portion 2d.

The printer cover 3 is connected to the front surface of the casing body 2 through a rotary shaft portion 11 so as to be openable and closable, and can be opened and closed around the rotary shaft portion 11 in a range of about 90 degrees. The rotating shaft portion 11 is provided on the lower side of the front surface side of the casing body 2 and is connected to the casing body 2 via a hinge piece 3 a attached to the lower end portion of the printer cover 3. Thereby, the upper end side of the printer cover 3 can be largely opened and closed.
When the printer cover 3 is in the closed state, the printer cover 3 is automatically locked by closing the front opening of the internal space S1 and engaging with an engaging portion (not shown) provided on the casing body 2 side. The

As shown in FIGS. 1 and 2, on the front side of the casing body 2, an operation unit 12 that releases the engagement between the engagement unit and the printer cover 3 is provided. The operation unit 12 can be pushed downward and can be unlocked by releasing the lock of the printer cover 3.
In addition to the operation unit 12, the front surface of the casing body 2 is provided with a power switch 13, various operation buttons 14, a display unit 15 for displaying various operation menus, operation information, and the like.

  By the way, when the printer cover 3 is closed, as shown in FIGS. 1 and 3, a slight gap is opened between the upper end of the printer cover 3 and the casing body 2. The recording paper P is discharged from the inside of the casing 4 by using it. That is, this gap functions as the discharge port 16 for the recording paper P.

  As shown in FIG. 2, the storage container 10 is attached to the inner surface of the printer cover 3. For this reason, the container 10 can be opened by opening the printer cover 3, and the roll paper R can be loaded or taken out.

  As shown in FIGS. 2 to 4, the container 10 is attached to the entire surface of the inner surface of the printer cover 3 except for the upper end side, and is a curved plate facing the inner surface of the printer cover 3. 10a and a pair of opposed surfaces facing the inner side wall 2d that are connected to the left and right edges of the curved plate 10a so as to rise toward the inside of the casing body 2 and face each other in the left-right direction L3 and define the inner space S1. The bottom plate facing the bottom wall 2a that is connected to the lower end edge of the curved plate 10a and the lower end edges of the pair of opposing plates 10b so as to rise toward the inside of the casing body 2 and the plate 10b and that defines the internal space S1. 10c.

The curved plate 10 a is curved in a concave curved shape toward the inside of the casing body 2, and the curvature thereof is substantially the same as the curvature of the roll paper R. A stepped portion 10 d that falls toward the inner surface side of the printer cover 3 is formed at the upper end portion of the curved plate 10 a.
The distance in the left-right direction L3 between the pair of opposing plates 10b is set to be slightly larger than the paper width of the roll paper R, and the roll paper R can be smoothly inserted and removed between the opposing plates 10b without resistance. It is possible. The space in the storage container 10 defined by the curved plate 10a, the pair of opposing plates 10b, and the bottom plate 10c functions as a storage space S2 that stores the roll paper R.

  Each of the pair of opposing plates 10b is provided with a shaft support piece 20 that supports the roll paper R in the accommodation space S2. The shaft support piece 20 is housed in a housing recess 25 formed on the outer surface side of the opposing plate 10b, and can be opened and closed in the left-right direction L3 around the base end portion. And a support protrusion 22 that is formed at the front end portion and rotatably supports the roll paper R.

  The arm plate 21 is a plate piece arranged so as to be orthogonal to the printer cover 3, and a base end portion located on the curved plate 10 a side can be rotated to the counter plate 10 b via a connecting pin or the like (not shown). It is connected to. A coil spring 23 is attached between the base end of the arm plate 21 and the opposing plate 10b to urge the arm plate 21 in the arm closing direction (inward of the container 10). As a result, the arm plate 21 is accommodated in the accommodating recess 25 without jumping out from the outer surface of the opposing plate 10b.

The support protrusion 22 protrudes from the distal end portion of the arm plate 21 toward the accommodation space S2, and protrudes toward the accommodation space S2 through a through hole 26 formed in the opposing plate 10b. The support protrusion 22 is formed in a truncated cone shape, for example, and is inserted into the shaft hole of the roll paper R to pivotally support the roll paper R.
When the roll paper R is accommodated in the accommodation space S <b> 2 while being pivotally supported by the support protrusion 22, the roll paper R can be rotated without contacting the accommodation container 10.

The printing module 5 is combined with the casing 4 as shown in FIG. 3 and performs printing on the recording paper P drawn from the roll paper R accommodated in the container 10 described above. The module is configured to be discharged from the discharge port 16.
Specifically, the printing module 5 includes a main body unit 30 attached to the casing body 2 side and a platen unit 31 attached to the printer cover 3 side and detachably combined with the main body unit 30. ing.

2 and 3, the platen unit 31 is assembled with the main unit 30 when the printer cover 3 is closed, and is separated from the main unit 30 when the printer cover 3 is opened, and the combination is released. It is supposed to be a unit. That is, the main body unit 30 and the platen unit 31 are automatically combined and separated according to the opening / closing operation of the printer cover 3.
As shown in FIG. 3, when the main unit 30 and the platen unit 31 are combined, the recording is performed so that the discharge port 16 and the storage space S <b> 2 in the storage container 10 communicate with each other between the units 30 and 31. A paper passage 40 is defined.

  The main body unit 30 is attached to a portion of the casing main body 2 located on the back side (rear side) of the display unit 15 and the operation button 14, and the recording paper P to be fed through the recording paper passage 40. A thermal head (printing head) 32 for printing on the printing surface P1 and a movable blade 33 disposed on the front side (downstream side) of the thermal head 32 are provided.

  As shown in FIGS. 2 to 4, the platen unit 31 is disposed on the front side of the platen roller 34 that feeds the recording paper P toward the discharge port 16 through the recording paper path 40. The fixed blade 35 is provided.

  The thermal head 32 is a head having a large number of heating elements (not shown), and is pressed against the platen roller 34 by a coil spring (not shown) and is pressed against the outer peripheral surface of the platen roller 34. As a result, the recording paper P can be sandwiched between the platen roller 34 and the thermal head 32. A driven gear (not shown) that meshes with a gear transmission mechanism that is driven by a motor (not shown) is fixed to one end of the platen roller 34. Therefore, the platen roller 34 is rotated in accordance with the driving of the motor, and can feed the recording paper P drawn from the roll paper R toward the discharge port 16 along the recording paper passage 40. Yes.

  As shown in FIG. 3, the fixed blade 35 and the movable blade 33 are arranged to face each other with the recording paper passage 40 interposed therebetween with the blade edges thereof facing each other. The movable blade 33 can be moved toward and away from the fixed blade 35 by sliding movement. As a result, the recording paper P printed by the thermal head 32 can be cut at an arbitrary timing. The fixed blade 35 and the movable blade 33 function as a cutter mechanism for cutting the recording paper P. That is, the printing module 5 of the present embodiment is a module with a cutter having a cutter mechanism.

  In addition, a control board 36 on which various electronic components are mounted is attached in the casing 4. For example, the control board 36 outputs an electrical signal or a control signal to the thermal head 32 or outputs a control signal to a motor for driving the platen roller 34 in response to an input from the operation button 14 or the like. Comprehensive control of products.

As described above, since the main unit 30 includes the thermal head 32 in the thermal printer 1 of the present embodiment, the printing surface P1 needs to face upward when the recording paper P reaches the thermal head 32. .
Therefore, as shown in FIG. 5, when the inner roll paper R1 is set in the storage container 10, the recording paper P is pulled out from the curved plate 10a side, and then is inserted into the insertion port 40a of the recording paper passage 40. It becomes a conveyance path inserted into the. On the other hand, as shown in FIG. 6, when the outer roll paper R2 is set in the storage container 10, the recording paper P is pulled out from the back wall 2b side of the casing body 2 and then the recording paper. It becomes a conveyance path inserted into the insertion port 40a of the passage 40 for use. As described above, the transport path until the inner roll paper R1 and the outer roll paper R2 are inserted into the insertion port 40a is different.

Incidentally, as shown in FIGS. 3, 5, and 6, in the casing 4, the recording paper P drawn from the roll paper R stored in the storage container 10 enters the insertion port 40 a of the recording paper passage 40. A tension applying unit 50 that applies tension to the recording paper P is attached until the sheet is inserted.
The tension applying section 50 includes a first tension applying section 51 that applies tension by pressing the recording paper P drawn from the inner roll paper R1 when the inner roll paper R1 is used, and an outer roll. When the roll paper R2 is used, the second tension applying unit 55 is configured to apply tension by pressing the recording paper P drawn from the outer roll paper R2.

As shown in FIGS. 3 and 4, the first tension applying unit 51 urges the pressing body 52 and the recording body P toward the recording paper P drawn from the inner roll paper R <b> 1 to perform the recording. And an elastic portion 53 such as a coil spring that presses the paper P.
The pressing body 52 is formed in an elongated shape along the left-right direction L3 between a pair of opposing plates 10b constituting the storage container 10, and is slidably movable in a stepped portion 10d formed at the upper end portion of the curved plate 10a. It is inserted in. At this time, the pressing body 52 is slidable in the front-rear direction L1 with little backlash while being guided by the wall surface of the stepped portion 10d. Moreover, the front-end | tip part 52a of the press body 52 is formed so that it may become a convex curve toward the recording paper P, and the one part is formed in the curvature same as the curvature of the curved board 10a.

The elastic portion 53 is interposed between the stepped portion 10d and the pressing body 52, urges the pressing body 52 rearward, and presses the leading end 52a of the pressing body 52 against the recording paper P. ing. Thereby, a predetermined tension is applied to the recording paper P.
Note that a plurality of elastic portions 53 are arranged at intervals in the left-right direction L3, and urge the pressing body 52 evenly over the entire length.

  Further, the first tension applying unit 51 not only presses the recording paper P to apply the tension, but also the recording paper P smoothly enters the insertion port 40a of the recording paper passage 40 as shown in FIG. The conveyance direction of the recording paper P to be fed is changed so as to be inserted into the paper. Specifically, by adjusting the number of elastic portions 53, the elastic force, and the like, the recording paper P in the insertion port 40a and the virtual insertion surface K that extends to the outside of the insertion port 40a along the recording paper passage 40 are provided. The conveyance direction is changed so that the insertion angle θ1 is within an angle range up to −50 °.

  The first tension applying unit 51 not only smoothly inserts the recording paper P, but also the paper that is generated when the state in which the recording paper P is inserted into the recording paper passage 40 is continued for a long time. The occurrence of soot can also be suppressed. If printing is performed with the recording paper P with wrinkles, there is a risk that printing defects may occur. Therefore, considering this point, the first tension applying unit 51 is also effective in reducing printing defects caused by paper wrinkles. Can be made. In addition, the effect of reducing the step-out at the beginning of printing can be exerted.

  Further, the pressing body 52 of the present embodiment is formed of a resin material containing reinforcing fibers, for example, by injection molding or the like. Examples of the reinforcing fiber include glass filler and the like, and the resin material contains about 30% by weight.

As shown in FIG. 3, the second tension applying portion 55 is a leaf spring formed of a metal material such as stainless steel, and includes a mounting piece 56 and an elastic piece 57, and the casing main body 2 is connected via the mounting piece 56. It is fixed to the internal top wall 2c that defines the internal space S1.
The elastic piece 57 extends downward, and functions as a pressing portion whose front end portion 57a contacts the recording paper P drawn from the outer roll paper R2 and presses the recording paper P. The front end portion 57a of the elastic piece 57 of the present embodiment has a rounded shape in order to reduce the contact resistance with the recording paper P. Specifically, it is smooth about 180 degrees so as to draw a semicircle. It is folded back while curving and the leading edge is facing upward. Therefore, the front end portion 57 a of the elastic piece 57 is formed in a convex curved shape with respect to the recording paper P. In addition, since the leading edge is directed upward, when the outer roll paper R2 is attached / detached, the leading edge is not easily caught.

  In addition, the second tension applying unit 55, as with the first tension applying unit 51, not only simply applies the tension by pressing the recording paper P, but also for the recording paper as shown in FIG. The conveyance direction of the recording paper P to be fed is changed so that the recording paper P is smoothly inserted into the insertion port 40a of the passage 40. Specifically, by adjusting the fixing position with respect to the inner top wall 2c, the elastic force of the elastic piece 57, and the like, the recording paper P in the insertion port 40a and the recording paper passage 40 extend to the outside of the insertion port 40a. The transport direction is changed so that the insertion angle θ2 formed by the virtual insertion surface K is within an angle range up to + 40 °.

  Note that the second tension applying unit 55 can also reduce printing defects caused by paper wrinkles and reduce step-out at the start of printing, as in the case of the first tension applying unit 51 described above. It is possible.

Further, as shown in FIG. 3, until the recording paper P drawn out from the roll paper R stored in the storage container 10 is inserted into the insertion port 40 a of the recording paper passage 40, the casing 4 is inserted. In addition, a guide portion 60 for guiding the recording paper P from the width direction is provided.
When the inner roll paper R1 is used, the guide section 60 is configured to guide the recording paper P drawn from the inner roll paper R1 and the outer roll paper R2. And a second guide portion 62 for guiding the recording paper P drawn from the outer roll paper R2.

  As shown in FIGS. 2 to 4, the first guide portion 61 is attached to a portion located between the first tension applying portion 51 and the platen unit 31 on the inner surface of the printer cover 3. The first guide portion 61 is a plate piece that is erected so as to face in the left-right direction L3 with a space slightly larger than the paper width of the roll paper R, and protrudes rearward from the pressing body 52. . Accordingly, as shown in FIG. 7, the recording sheet P whose conveyance change is changed by the pressing body 52 of the first tension applying unit 51 is fed toward the insertion port 40 a while being guided by the first guide unit 61. The

  As shown in FIGS. 2 and 3, the second guide portion 62 is formed on each of the pair of inner side wall portions 2 d that define the inner space S <b> 1 of the casing body 2. The second guide portion 62 is a rib disposed so as to face the left-right direction L3 with a gap slightly larger than the paper width of the roll paper R, and is formed to be long along the front-rear direction L1. As a result, as shown in FIG. 8, the recording paper P whose transport direction has been changed by the second tension applying section 55 is fed toward the insertion port 40a while being guided by the second guide section 62.

(Thermal printer operation)
Next, the operation of the thermal printer 1 configured as described above will be described.
First, a case where an unused inner roll paper R1 is set and printing is performed on the recording paper P of the inner roll paper R1 will be described.

  First, as illustrated in FIG. 2, the printer cover 3 is opened by opening the operation unit 12 to open the storage container 10, and then the inner roll paper R <b> 1 is loaded into the storage container 10. As a result, the inner roll paper R <b> 1 is pushed in while sliding on the surface of the support protrusion 22 by this input operation. Thereby, since the support protrusion 22 is pushed out toward the outer side of the container 10, the pair of arm plates 21 are rotated and opened in the arm opening direction. However, since the arm plate 21 is urged in the closing arm direction by the coil spring 23, the support protrusion 22 is pressed against the side surface of the inner roll paper R1.

  When the shaft hole reaches the position of the support protrusion 22 by further pressing the inner roll paper R1, the support protrusion 22 pressed against the side surface of the inner roll paper R1 is automatically inserted into the shaft hole. The pair of arm plates 21 rotate in the closing arm direction. As a result, the inner roll paper R <b> 1 is pivotally supported by the pair of pivotal pieces 20 including the arm plate 21 and the support protrusion 22. Note that the arm plate 21 is completely stored in the storage recess 25 formed in the counter plate 10b, and is prevented from protruding from the outer surface of the counter plate 10b.

After the above-described setting of the inner roll paper R1 is completed, the printer cover 3 is closed with the recording paper P pulled out by a certain length. When the printer cover 3 is completely closed, the printer cover 3 is engaged with the engaging portion of the casing body 2 and is automatically locked.
Further, by closing the printer cover 3, as shown in FIG. 5, the platen unit 31 attached to the printer cover 3 and the body unit 30 attached to the casing body 2 side are integrally combined. It becomes a state. Accordingly, the drawn recording paper P is held between the thermal head 32 and the platen roller 34 and is contained in the recording paper passage 40 defined between the platen unit 31 and the main body unit 30. Become.

Next, printing on the recording paper P is started.
First, the platen roller 34 is rotated via a gear transmission mechanism by driving a motor. As a result, the recording paper P sandwiched between the outer peripheral surface of the platen roller 34 and the thermal head 32 is fed toward the discharge port 16, and the inner roll paper R <b> 1 that is pivotally supported by the pivotal support piece 20. Rotates. At the same time, the thermal head 32 is actuated to appropriately generate a large number of heating elements. Thereby, various characters, figures, and the like can be printed on the fed recording paper P.

  The printed recording paper P is further fed by the rotation of the platen roller 34, and passes between the fixed blade 35 and the movable blade 33. Then, by sliding the movable blade 33 toward the fixed blade 35 at the timing when the printing is finished, the recording paper P can be sandwiched between the fixed blade 35 and the movable blade 33 and cut. As a result, the recording paper P that has been printed and cut can be taken out from the discharge port 16, and the recording paper P can be used as a receipt, a ticket, or the like.

Next, the case where not the inner roll paper R1 but the outer roll paper R2 is used will be described. Even in this case, the roll paper setting procedure and printing method are the same as those of the above-described inner roll paper R1. Therefore, the recording paper P that has been printed and cut can be discharged from the common discharge port 16 and is easy to use.
In particular, according to the thermal printer 1 of the present embodiment, it is not necessary to separately provide the discharge port 16 corresponding to each of the inner roll paper R1 and the outer roll paper R2, and thus it is easy to reduce the size by simplifying the configuration. .

  By the way, as shown in FIGS. 5 and 6, when the inner roll paper R1 is used and when the outer roll paper R2 is used, the drawn recording paper P is inserted into the insertion opening 40a of the recording paper passage 40. Since the transport path until it is inserted into the card is different, the drawn length is also different. However, according to the thermal printer 1 of the present embodiment, the optimum tension corresponding to each roll is applied to the recording paper P regardless of whether the inner roll paper R1 or the outer roll paper R2 is used. Can do.

This point will be described in detail.
First, when the inner roll paper R1 is used as shown in FIG. 5, the leading end 52a of the pressing body 52 of the first tension applying unit 51 receives the elastic restoring force from the elastic unit 53 and receives the recording paper P. Is pressed with a force according to the length or the like. As a result, an optimum tension can be applied to the recording paper P, and the occurrence of slackness or the like on the recording paper P can be suppressed.
Further, when the outer roll paper R2 is used as shown in FIG. 6, the leading end 57a of the elastic piece 57 of the second tension applying unit 55 causes the recording paper P to have its length or the like by its own elastic restoring force. Press with a force according to. Thereby, an optimum tension can be applied to the recording paper P, and the occurrence of slack in the recording paper P can be suppressed.

In this way, even when any roll paper R is used, an optimum tension can be applied to each recording paper P, and slack can be suppressed. Therefore, it is possible to feed the recording paper P with a constant conveyance torque, and it is possible to make it difficult for printing defects such as printing unevenness to occur, and clear printing can be performed. In particular, even when a roll paper R in an unused state is set, the occurrence of slack can be suppressed, so that it is possible to prevent the conveyance torque from rapidly increasing and to effectively suppress printing defects.
In addition, the first tension applying portion 51 and the second tension applying portion 55 are provided at a position until the recording paper P drawn out instead of the shaft support piece 20 is inserted into the insertion port 40a of the recording paper passage 40. Therefore, the configuration is simplified. Therefore, it is easy to reduce the size and cost of the thermal printer 1.

The first tension applying unit 51 and the second tension applying unit 55 not only apply tension by pressing the recording paper P, but also the insertion angle of the recording paper P into the recording paper path 40 is a predetermined angle. The conveyance direction is changed so as to be within the range.
That is, as shown in FIG. 7, the first tension applying unit 51 transports the recording paper P so that the insertion angle θ1 formed by the recording paper P and the virtual insertion surface K is within an angular range up to −50 °. , And the second tension applying unit 55 moves the recording paper P in the conveyance direction so that the insertion angle θ2 formed by the recording paper P and the virtual insertion surface K is within an angular range up to +40, as shown in FIG. Has changed.

  Therefore, even if the conveyance path of the recording paper P differs depending on the inner roll paper R1 or the outer roll paper R2, the recording paper P can be smoothly inserted into the recording paper path 40 with little resistance. Accordingly, it is easy to reduce the conveyance resistance, and it is possible to suppress the occurrence of paper jam or the like.

  Further, in the first tension applying portion 51, the pressing body 52 that contacts the recording paper P is formed of a resin material containing a glass filler, and thus is highly resistant to frictional resistance and hardly worn. For this reason, generation of wear powder or the like can be suppressed, and it is difficult to cause a printing defect due to adhesion of the powder to the thermal head 32 or the like. In addition, since the leading end 52a of the pressing body 52 is formed to be a convex curved surface toward the recording paper P, it is easy to press the recording paper P with an equal force and to easily slide the recording paper P. . For this reason, the recording paper P can be guided smoothly without being caught, and it is easy to further reduce the conveyance resistance, and it is difficult to rub or scratch the recording paper P.

  Further, the second tension applying portion 55 is also formed of a metal material, and the tip portion 57a of the elastic piece 57 is folded back while being smoothly curved by about 180 degrees, and is formed in a convex curved shape toward the recording paper P. Has been. Therefore, the same effect as that of the first tension applying unit 51 described above can be exerted also on the second tension applying unit 55.

  Further, since the first guide portion 61 and the second guide portion 62 are provided inside the casing 4, the recording can be performed regardless of which of the inner roll paper R1 or the outer roll paper R2. The paper P can be guided from the width direction. Therefore, it is difficult for the recording paper P to run illegally such as meandering and skewing before being inserted into the recording paper passage 40. Therefore, it is possible to effectively suppress the occurrence of printing misalignment or paper jam.

As described above, according to the thermal printer 1 of the present embodiment, the recording paper P is appropriately loosened with a simple configuration regardless of whether the roll paper is the inner roll paper R1 or the outer roll paper R2. It is possible to print clearly while suppressing.
When the roll paper R is gradually reduced in diameter as the thermal printer 1 is used, the recording paper P does not come into contact with the first tension applying unit 51 or the second tension applying unit 55 and is used for the recording paper. It is inserted directly into the insertion port 40 a of the passage 40. Even in this case, the design is made in consideration of the positional relationship between the insertion port 40a and the container 10 so that the above-described insertion angles θ1 and θ2 are within a predetermined angle range.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, the thermal printer 1 has been described as an example of a printer, but the present invention is not limited to this. For example, an inkjet printer that prints using an inkjet head (print head) may be used.

In the above embodiment, the platen unit 31 is disposed on the printer cover 3 side and the main unit 30 is disposed on the casing body 2 side. On the contrary, the main body unit 30 is disposed on the printer cover 3 side. The platen unit 31 may be disposed on the casing body 2 side.
Further, the movable blade 33 is provided in the same unit as the thermal head 32 and the fixed blade 35 is provided in the same unit as the platen roller 34. However, the present invention is not limited to this, and the reverse may be possible. Moreover, the cutter mechanism of the fixed blade 35 and the movable blade 33 is not an essential configuration and may not be provided.

  Moreover, in the said embodiment, although it was set as the structure which supports a roll paper using a pair of shaft support piece 20 which has the arm board 21 and the support protrusion 22, this structure is an example and the axis | shaft which employ | adopted another structure. It does not matter as a support system.

  Moreover, in the said embodiment, although the press body 52 which comprises the 1st tension provision part 51 was formed with the resin material in which the reinforced fiber was contained, the glass filler was mentioned as an example of a reinforced fiber. Various kinds of (super) engineering plastics having excellent wear resistance and metals (stainless steel, aluminum alloy materials, etc., or metal surface modification / coating products) can be suitably used. Even in these cases, it is possible to obtain the pressing body 52 that is strong in frictional resistance and hardly wears.

  Further, the elastic portion 33 that presses the pressing body 52 against the recording paper P is not limited to the coil spring, and may be a leaf spring or the like.

  Further, both the first tension applying unit 51 and the second tension 55 are in contact with the roll paper R except for a convex curved surface structure such as the tip 52a of the pressing body 52 or the tip 57a of the elastic piece 57. In addition, for example, a rotating roller structure that can apply tension to the recording paper P while rotating may be employed.

(Modification)
For example, the first tension applying unit 51 will be described as an example. As shown in FIG. 9, the leading end 52a of the pressing body 52 is a roller unit that is rotatable in the paper feed direction of the recording paper P. By doing so, it is easy to press the recording paper P with an equal force, and the recording paper P is hardly slid by the rotation of the leading end portion 52a which is a roller portion, so that the contact resistance with respect to the recording paper P is minimized. can do. Therefore, it is easy to reduce the conveyance resistance more effectively, and it is possible to make it difficult to rub or scratch the recording paper P.
Even in this case, it is preferable to form the tip portion 52a, which is a roller portion, from a metal material or a resin material containing reinforcing fibers.

  Moreover, in the said embodiment, the structure of the 1st tension provision part 51 and the 2nd tension provision part 55 is an example, and is not limited to the said structure. For example, the first tension applying unit 51 may be configured by a leaf spring like the second tension applying unit 55, or may be configured using another spring configuration such as a torsion coil spring. Further, the second tension applying unit 55 may have a spring configuration other than a leaf spring, such as a torsion coil spring, or the same configuration as the first tension applying unit 51.

Further, each of the first tension applying unit 51 and the second tension applying unit 55 is configured to be removable so that, for example, the tension applying unit that has been worn by the contact of the roll paper R with the recording paper P can be replaced. It may be. In this way, the printer can be used for a long period of time by replacing parts. Also, when the diameter of the roll paper R is so small that it is not necessary to apply tension (when the recording paper P of the roll paper R does not come into contact with the first tension application unit 51 or the second tension application unit 55), the roll paper R is used. When the winding method of the roll paper R is known in advance, the tension applying unit that may not be attached may be removed. By doing so, for example, a wide internal space of the storage container 10 can be secured, and the roll paper R can be easily put into and out of the storage container 10.
As described above, the first tension applying unit 51 and the second tension applying unit 55 can be replaced by being removable as necessary, and can be configured to be used and used. May be.

(Modification)
Here, for example, the case where the first tension applying portion is configured by a leaf spring will be described as an example. As shown in FIG. 10, the first tension applying unit 70 is a leaf spring formed of a metal material such as stainless steel, and includes a mounting piece 71 and an elastic piece 72, and is attached to the storage container 10 via the mounting piece 71. It is fixed in the formed step 10d.
The elastic piece 72 extends toward the inside of the casing body 2 and functions as a pressing portion that presses the recording paper P with its tip end portion 72a being in contact with the recording paper P drawn from the inner roll paper R1. The leading end 72a of the elastic piece 72 of the present embodiment has a rounded shape in order to reduce the contact resistance with the recording paper P. Specifically, it is smooth about 180 degrees so as to draw a semicircle. The leading edge is directed to the platen unit 31 side. Therefore, the leading end 72 a of the elastic piece 72 is formed in a convex curved shape with respect to the recording paper P. Further, since the leading edge is directed toward the platen unit 31, the design is such that the leading edge is not easily caught when the inner roll paper R1 is attached or detached.

  Thus, even if it comprises the 1st tension provision part 70 with a leaf | plate spring, the same effect can be show | played. In particular, the tension can be applied to the recording paper P with a simple configuration of a leaf spring, and the paper can be fed to the insertion port 40a of the recording paper passage 40 at an optimum insertion angle by changing the conveyance direction of the recording paper P. This is preferable.

  Further, in the above-described embodiment, the first tension applying unit and the second tension applying unit may be configured to be further swingable in the paper feeding direction of the recording paper P. The configuration in this case will be described by taking the first tension applying unit as an example.

(Modification)
As shown in FIGS. 11 to 14, the first tension applying unit 80 in this case urges the pressing body 81 and the pressing body 81 toward the recording paper P drawn from the inner roll paper R1. A coil spring (elastic portion) that presses the front end 81a of the pressing body 81 against the recording paper P and elastically supports the pressing body 81 so as to be swingable in the paper feeding direction of the recording paper P (the arrow direction shown in FIG. 11). 82).

  The pressing body 81 is a member that is elongated along the left-right direction L3, which is the paper width direction of the recording paper P. The pressing body 81 is disposed in the step portion 10d formed at the upper end of the curved plate 10a of the storage container 10 in the front-rear direction. It is slidably arranged in the direction L1. At this time, the pressing body 81 is slidable while being guided by the wall surface 10e of the stepped portion 10d.

  The front end 81 a of the pressing body 81 is a portion that is in contact with the recording paper P over almost the entire length of the paper width, and is smoothly curved so as to form a convex curved surface toward the recording paper P. A first flange piece 81b and a second flange piece 81c project from the base end portions on both sides in the left-right direction L3 of the pressing body 81 toward the outside in the left-right direction L3. The first flange piece 81b is a plate piece that is parallel to the bottom surface 10f of the step portion 10d and the inner surface of the printer cover 3, and the second flange piece 81c is parallel to the wall surface 10e of the step portion 10d. The plate is in contact with the wall surface 10e. The first flange piece 81b and the second flange piece 81c are connected to each other so as to be L-shaped in a side view.

A recess 81d is formed in a portion of the base end portion of the pressing body 81 that is sandwiched between the pair of first flange piece 81b and the second flange piece 81c, and the curved plate 10a is formed in the recess 81d. A guide protrusion 10g of the storage container 10 located at the upper end is disposed. Between this guide protrusion 10g and the pressing body 81, the clearance gap H (refer FIG. 12) which permits the sliding movement of the pressing body 81 is ensured.
The first flange piece 81b is in slidable contact with the side surface of the guide protrusion 10g. Also in this point, the pressing body 81 is slidable while being guided in the front-rear direction L1.

The first flange piece 81b is formed with a guide hole 86 through which a connecting screw (guide shaft) 85 is inserted. The connecting screw 85 is a member that connects the pressing body 81 to the container 10 and guides the sliding movement of the pressing body 81, and is inserted into the guide hole 86 on the bottom surface 10 f of the step portion 10 d. It is screwed. At this time, the head portion of the connecting screw 85 is screwed so as to remain at a position separated from the bottom surface 10f of the stepped portion 10d.
In the illustrated example, an E-ring 87 is fixed to the connecting screw 85, and the amount of screwing into the stepped portion 10d via the washer 88 is defined.

The coil spring 82 is disposed between the first flange piece 81b of the pressing body 81 and the bottom surface 10f of the stepped portion 10d in a state of being fitted to the connecting screw 85, and biases the pressing body 81 by elastic force. And pressed against the recording paper P. In particular, when the pressing body 81 is biased by the coil spring 82, it slides in the front-rear direction L1 with little backlash by a guide by the wall surface 10f of the stepped portion 10d, a guide by the second flange piece 81c, a guide by the connecting screw 85, etc. It is possible.
The head portion of the connecting screw 85 regulates the amount of movement of the pressing body 81 urged by the coil spring 82.

  By the way, the guide hole 86 is opened with a diameter larger than the diameter of the connection screw 85, and a gap allowing the swing of the pressing body 81 is defined between the guide hole 86 and the connection screw 85. Has been.

  When configured as described above, the coil spring 82 urges the pressing body 81 toward the recording paper P and supports the pressing body 81 in a swingable manner. Therefore, the pressing body 81 swings (tilts) as shown in FIGS. 13 to 14 with the recording paper P being fed while pressing the recording paper P. The swinging of the pressing body 81 stops when the inner edge of the guide hole 86 contacts the connecting screw 85, for example.

  As a result, the recording paper P can be fed to the insertion port in a form close to the natural state as it is pulled out from the roll paper without causing local bending as much as possible. That is, in the state shown in FIG. 13, the recording paper P bends at the angle θ3 at the front end 81a of the pressing body 81, but the angle θ3 becomes larger gradually as shown in FIG. become. Therefore, the conveyance load of the recording paper P can be reduced.

Further, at the start stage in which the recording paper P is fed by the start of printing, as shown in FIG. 14, the pressing body 81 swings along with the recording paper P, thereby smoothly guiding the recording paper P in the transport direction. it can. For this reason, it is possible to effectively reduce the conveyance load, and it is possible to suppress an increase in the conveyance torque at the start-up stage, and it is easy to prevent printing defects such as printing unevenness.
Moreover, when printing is stopped, the pressing body 81 inclined in the paper feeding direction is swung in the reverse direction by the elastic restoring force of the coil spring 82, and can be naturally returned to the original position as shown in FIG. . Therefore, even if printing is restarted after that, it is possible to repeatedly suppress an increase in conveyance torque at the start of paper feeding.

Further, since the pressing body 81 slides in the front-rear direction L1 with little backlash by a guide or the like by the connecting screw 85, it is easy to stably press the recording paper P. Further, since the head portion of the connecting screw 85 regulates the amount of movement of the pressing body 81 biased by the coil spring 82, the recording paper P can be pressed with an appropriate pressing force, and an optimum tension can be easily applied.
Furthermore, since the pressing body 81 can be moved over a wide range by swinging, even if the roll diameter of the roll paper R1 changes (changes from a large diameter to a small diameter), the recording paper P is likely to contact. Therefore, it is possible to suppress the slack of the recording paper P in a wide diameter range.

  In the configuration described above, the connecting screw 85 is not essential and may not be provided. In this case, for example, one end side of the coil spring 82 is connected to the bottom surface 10f of the stepped portion 10d and the other end side is connected to the pressing body 81 so that the pressing body 81 is elastically supported by the coil spring 82 so as to be swingable. You may do it. In this case, other elastic portions such as a leaf spring may be employed instead of the coil spring 82.

K ... Virtual insertion surface R ... Roll paper P1 ... Printing surface P ... Recording paper 1 ... Thermal printer (printer)
10 ... Container (container)
4 ... Casing (housing)
5 ... Printing module 16 ... Discharge port 32 ... Thermal head (printing head)
34 ... Platen roller 40 ... Recording paper passage 40a ... Insertion port for recording paper passage 50 ... Tension applying portion 51, 70, 80 ... First tension applying portion 55 ... Second tension applying portion 60 ... Guide portion 61 ... First Guide part 62 ... 2nd guide part 81 ... Pressing body 82 ... Coil spring (elastic part)
85 ... Connection screw (guide shaft)
86 ... Guide hole

Claims (7)

A storage unit for storing either the inner roll paper in which the recording paper is wound with the printing surface facing inward or the outer roll paper in which the recording paper is wound with the printing surface facing outward. A housing having a discharge port for discharging the recording paper drawn from the roll paper;
The combined to the housing, and performs printing on the recording sheet pulled out from the roll paper housed in the housing portion, the recording paper after printing by the printer that includes a print module which is discharged from the discharge port There ,
The printing module includes a recording paper path that allows the discharge port and the storage portion to communicate with each other, a platen roller that feeds the recording paper toward the discharge port through the recording paper path, and the paper that is fed. and a print head for printing on the printing surface of the recording paper,
The housing has, in its inside, until the recording sheet pulled out from the roll paper housed in the housing portion is inserted into the insertion opening of the passage for the recording paper, the tension to the recording sheet Is provided with tension to give
The tension applying unit is
A first tension applying unit that applies tension by pressing the recording paper drawn from the inner roll paper, and a first tension that applies tension by pressing the recording paper drawn from the outer roll paper. 2 tension applying part ,
The first tension applying section and the second tension applying section are formed along the paper width direction of the recording paper, and a pressing body whose tip is in contact with the recording paper, and urging the pressing body, An elastic part that presses the tip of the pressing body against the recording paper, and the elastic part elastically supports the pressing body in a swingable direction in the paper feeding direction of the recording paper,
The pressing body of the first tension applying portion is formed with a guide hole through which a guide shaft is inserted at a base end portion thereof, and the guide shaft pushes the pressing body of the first tension applying portion in a biasing direction. In addition to guiding, the amount of movement in the urging direction is restricted, and a gap is defined between the guide hole and the guide shaft to allow the pressing body of the first tension applying portion to swing. A printer characterized by that. The printer according to claim 1.
The first tension applying section and the second tension applying section have a predetermined insertion angle formed between the recording paper at the insertion opening and a virtual insertion surface extending to the outside of the insertion opening along the recording paper passage. The printer is characterized by changing the transport direction of the recording paper that is fed toward the insertion port so as to fall within the angle range. The printer according to claim 1 or 2 ,
Inside the housing, there is a guide portion that guides the recording paper from the width direction until the recording paper drawn from the roll paper stored in the storage portion is inserted into the insertion port. Provided,
The guide portion is
A first guide portion for guiding the recording paper drawn from the inner roll paper;
Printer, characterized in that a second guide portion for guiding the recording sheet pulled out from the outer winding roll. The printer according to any one of claims 1 to 3 ,
The printer according to claim 1, wherein the first tension applying unit or the second tension applying unit is detachable from the inside of the housing. The printer according to any one of claims 1 to 4 ,
In the first tension applying section and the second tension applying section, at least a portion of the pressing body that presses the recording paper is formed of a metal material or a resin material containing reinforcing fibers and is directed toward the recording paper. A printer having a convex curved surface. The printer according to any one of claims 1 to 4 ,
The first tension applying section and the second tension applying section, a portion which presses the recording paper in the pressing member, characterized in that there is a rotatable roller unit in the paper feeding direction of the recording paper Printer. The printer according to claim 6 .
The printer is characterized in that a portion of the pressing body that presses the recording paper is formed of a metal material or a resin material containing reinforcing fibers.

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