JP2011148639A - Label printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a label printer having paper guides for easily inserting an adhesive roll of rolling up an adhesive label continuous body, and capable of delivering the adhesive label continuous body without a large load. <P>SOLUTION: This label printer includes a pair of paper guides 17 having a support shaft 21 for rotatably journaling the adhesive roll and sandwiching the adhesive roll from both side surface parts, and an interlocking mechanism for approaching-separating the paper guides 17 by interlocking with the axial direction of the adhesive roll. A projection part 27 projecting from this opposed surface is arranged on the opposed surface of the respective paper guides 17. A delivery position in the width direction of the adhesive roll is guided to a predetermined position by regulating both side surface parts of the adhesive roll via the projection part 27. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a label printer including a paper supply device that pivotally supports an adhesive roll obtained by winding an adhesive label continuous body in a roll shape, and in particular, by regulating both side portions of the adhesive roll, The present invention relates to a label printer including a paper guide that guides a feeding position in the width direction of a body to a predetermined position.

  In recent years, in a wide range of fields such as production sites, distribution sites, and sales sites, barcodes, symbols, characters, etc. are printed and issued on the surface of adhesive labels that are fed out from an adhesive roll obtained by winding a continuous adhesive label roll. A label printer is used. In such a label printer, the adhesive roll is pivotally supported by a support shaft, and a pair of plate-like members provided facing the width direction of the adhesive roll (direction perpendicular to the adhesive label transport direction). This is a so-called center distribution system, which is equipped with a paper supply device that positions the adhesive roll at the center in the width direction of the printer by moving the paper guides in close proximity to each other and contacting both sides of the adhesive roll. A label printer is known (for example, see Patent Document 1). However, with the system that aligns the paper guides each time the adhesive label is attached / detached, it sometimes makes excessive contact with both sides of the adhesive roll. When the body is extended, the side surface of the adhesive roll that is pivotally supported by the support shaft and the plate-shaped paper guide rub against each other to generate friction, which causes an unexpected load on the adhesive label transport. It was. In particular, even if there is no release mount on the back of the adhesive label, so-called non-mounting label, or even with a release mount, a cut to separate the adhesive labels is performed, but unnecessary portions are not removed ( In the case of pressure-sensitive adhesive labels, etc., the adhesive is exposed in a spiral shape on the side surface of the pressure-sensitive adhesive roll, so that when the side surface of the pressure-sensitive roll contacts the paper guide, There was a problem that the pressure-sensitive adhesive was bonded, and an unexpected load was generated in the feeding of the pressure-sensitive adhesive label continuous body, which hindered the conveyance of the pressure-sensitive adhesive label.

  Therefore, a pair of support members, a pair of pivots provided on each of these support members along the direction of the axis of the adhesive roll and the direction substantially perpendicular to the insertion direction, and a label on the opposing surface side of each support member And a pair of oscillating members swingably mounted on the respective pivots at a substantially intermediate portion in the insertion direction of the adhesive roll, and lower ends of these oscillating members. The paper guide is provided with a biasing member that biases in the approaching direction, and once the position in the width direction is adjusted, the adhesive roll can be detached without adjusting the position in the width direction every time the adhesive roll is detached. A label printer using the center distribution method has been proposed. When attaching the adhesive roll to the label printer having such a configuration, the distance between the pair of support members is adjusted in advance to a predetermined position corresponding to the width of the adhesive roll, and then the adhesive roll is inserted from the upper insertion port. The lower end of the swinging member and the surface of the swinging member are brought into contact with each other, and the lower end of the swinging member is swung in the separating direction. With this type of paper supply device, when removing and attaching adhesive rolls with the same substrate width, once adjustments are made, there is no need to make adjustments each time, but when an adhesive roll is inserted or an adhesive label continuous body is fed out. Sometimes, the adhesive roll and the paper guide come into contact with each other and rub against each other, and there still remains the problem of the load when inserting the adhesive roll and the load when paying out due to adhesion of the adhesive to the paper guide. In particular, a label without a mount, in which the adhesive is exposed on both side portions of the adhesive roll, has a problem that the load during insertion and feeding due to the contact between the adhesive and the swinging member is large.

JP 2000-238937 A

  The present invention has been made in view of such problems, and facilitates the insertion of the adhesive roll obtained by winding the adhesive label continuous body into a roll, and allows the adhesive label continuous body to be fed out without a large load. An object is to provide a label printer provided with a guide.

In order to solve the above problems, a label printer of the present invention has a support shaft that rotatably supports an adhesive roll obtained by winding an adhesive label continuous body in a roll shape, and is arranged at intervals. A pair of paper guides sandwiching the adhesive roll inserted from above between both sides, and an interlocking mechanism for moving the pair of paper guides closer to and away from each other in the axial direction of the adhesive roll. In the printer, the opposing surfaces of the pair of paper guides have a protruding portion that protrudes from the opposing surfaces and is provided along the insertion direction of the adhesive roll.
The pair of paper guides includes a swinging member that is swingable about a substantially middle portion in the insertion direction of the adhesive roll and a biasing member that biases the lower end of the swinging member closer to each other. The support shaft is provided in the vicinity of the upper end of the swing member, and the convex portion is provided at a position in contact with the lower end of the outer peripheral edge when the adhesive roll of the swing member is inserted. Features.
The swing member is provided with a pivot serving as the fulcrum of the swing member along the axial direction of the adhesive roll and the direction substantially perpendicular to the insertion direction, and is supported by the pivot of the pair of paper guides. The interval between the portions is set to be slightly larger than the length in the axial direction of the adhesive roll, and the convex portion is provided with the support shaft side as the upper end from the line connecting the rotation centers of the pivots. It is characterized by being.
Further, as the adhesive roll is inserted in the insertion direction, the lower end of the outer peripheral edge of the adhesive roll abuts on the convex portion, and the lower end of the swinging member is swung in a direction away from each other, The support shaft is projected between paper guides, and the center hole of the adhesive roll is held by the support shaft.
The convex portion is provided in a thin line shape having a substantially semicircular cross section.
Further, the surface of the convex portion is subjected to a peeling treatment.
Further, the pair of paper guides has a through hole in which the swinging member is accommodated, and the support shaft is passed through the penetrating member when the biasing member swings in a direction in which lower end portions of the swinging member approach each other. The lower end of the swinging member is located inside the hole and protrudes inward from the inner surface of the paper guide, the lower end of the outer peripheral edge of the adhesive roll is in contact with the convex portion, and the lower end of the swinging member is a through hole. By being pushed in, the support shaft protrudes inward from the inner surface of the paper guide, and the center hole of the adhesive roll is held by the support shaft.

The present invention has the following effects.
Convex portions projecting from the opposing surface are provided on the opposing surface of each paper guide, and by restricting the both side surface portions of the adhesive roll via the convex portion, it is orthogonal to the feeding direction of the adhesive label. Since the feeding position in the width direction is guided to a predetermined position, the contact area between the paper guide and the adhesive layer exposed on both side surfaces of the adhesive roll can be reduced, and insertion of the adhesive roll is greatly increased. While being able to carry out without a load, an adhesive label continuous body can be stably paid out without a big load.
Moreover, since the convex portion is provided so as to be able to come into contact with at least the end surface on the inner peripheral side of both side surface portions of the adhesive roll, the adhesive label continuous body can be stably fed out to the end.
In addition, since the convex portion is provided in a thin line shape having a substantially semicircular cross section, the contact area between the paper guide and the adhesive layer can be reduced, and the adhesive label continuous body is loaded from the adhesive roll with a large load. It can be paid out without any problems.
Moreover, since the convex part was provided along the insertion direction of the adhesive roll, the adhesive roll can be inserted without a large load.
According to the label printer of the invention described in claim 5, since the surface of the convex portion is subjected to the peeling treatment, the adhesive that appears on the side surface of the adhesive roll is prevented from adhering to the paper guide. Thus, the pressure-sensitive adhesive roll can be inserted without a large load, and the pressure-sensitive adhesive label continuous body can be fed out from the pressure-sensitive adhesive roll without a large load.
The paper guide includes a pair of support members, a pair of pivots provided on each of the support members along the direction of the axis of the adhesive roll and the direction substantially perpendicular to the insertion direction, and opposing surfaces of the support members. A pair of oscillating members that are disposed along the label conveying direction and are slidably mounted on the respective pivots at a substantially intermediate portion in the inserting direction, and lower ends of these oscillating members. An urging member that urges the paper guide in the direction of approaching, and the interval between the portions supported by the pivot of the paper guide is set to be slightly larger than the axial length of the adhesive roll. Since the protrusions are provided on each swing member, the adhesive roll can be smoothly inserted without a large load, and the adhesive label continuous body can be fed out from the adhesive roll without a large load.

1 is a perspective view showing a label printer according to an embodiment of the present invention. FIG. The schematic perspective view of an adhesive roll. The schematic sectional drawing which looked at FIG. 2 from the XX direction which shows the motion of each part at the time of attaching an adhesive roll to a paper supply apparatus. The schematic sectional drawing which looked at FIG. 2 from the YY direction which shows the state which attached the adhesive roll to the paper supply apparatus. FIG. 3 is a schematic diagram illustrating a facing surface of a paper guide. The fragmentary sectional view of the rocking | fluctuation member which looked at FIG. 6 from the ZZ direction.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the part same as the past, and the description is abbreviate | omitted.

  FIG. 1 is a perspective view showing a label printer according to an embodiment of the present invention, FIG. 2 is a schematic plan view of the label printer, FIG. 3 is a schematic perspective view of an adhesive roll, and FIG. The schematic sectional drawing which looked at the movement of each part at the time of attaching to FIG. 2 from the XX direction. FIG. 5 is a schematic cross-sectional view of FIG. 2 as viewed from the Y-Y direction, showing a state where the adhesive roll is attached to the paper supply device, FIG. 6 is a schematic view showing the opposing surface of the paper guide, and FIG. FIG. 6 is a partial cross-sectional view of the swing member when 6 is viewed from the ZZ direction.

  As shown in FIGS. 1 and 2, the label printer 1 according to the present embodiment includes a lower housing 2 and an upper cover 3 that covers the upper portion of the lower housing 2 so that it can be opened and closed with the rear side as a fulcrum. A body 4, a thermal head 5 provided on one end side of the upper cover 3, a platen roller 7 provided on one end side of the lower casing 2 so as to face the heating element 6 of the thermal head 5, and a lower casing A sheet feeding device 9 provided on the other end side of the body 2 and rotatably supporting and storing the adhesive roll 8, and the adhesive label continuous body 10 fed out from the sheet feeding device 9 is a platen While being sandwiched between the roller 7 and the thermal head 5, the heating element 6 of the thermal head 5 is selectively heated while being conveyed by the rotational driving force of the platen roller 7, and desired characters and barcodes are applied to individual adhesive labels. Configured to print To have.

  In this embodiment, as shown in FIG. 3, for example, the adhesive roll 8 is a so-called mountless label in which an adhesive layer 12 is provided on the back surface of the label substrate 11 and a release agent layer 13 is provided on the surface. The one wound around the paper tube 15 in a roll shape with the pressure-sensitive adhesive layer 12 of 14 inside is used. The pressure-sensitive adhesive layer 12 is repeatedly exposed on both side portions of the pressure-sensitive adhesive roll 8 obtained by winding the label 14 having no mount.

  The paper supply device 9 is installed in a roll storage recess 16 formed in the lower housing 2 and opening upward, and a direction perpendicular to the feeding direction of the adhesive label continuous body 10 (at the bottom of the roll storage recess 16 ( Hereinafter, a pair of paper guides 17 are provided, which are arranged at intervals in the width direction) and between which the adhesive roll 8 is inserted in the bottom direction along the radial direction from above. As shown in FIGS. 4 and 5, each of the paper guides 17 has a pair of support members 18 and a pair of pivots provided along the axial direction of the adhesive roll 8 and the direction substantially orthogonal to the insertion direction. 19 and a pair of oscillating members 20 that are disposed on the opposite surface side of each paper guide 17 and are slidably mounted on each pivot 19 at a substantially intermediate portion in the vertical direction (insertion direction). In the vicinity of the upper end portion of each swing member 20, a support shaft 21 that protrudes toward the other swing member 20 and a biasing member 22 that biases the lower end portions of each swing member 20 toward each other are provided. The basic structure is set such that the interval between the portions of the paper guide 17 supported by the pivot 19 is slightly larger than the length of the adhesive roll 8.

  Furthermore, the upper end portions of the both paper guides 17 are guide surfaces 23 that are inclined so as to be gradually separated from each other as they go upward, and a through hole in which the swing member 20 is accommodated in the central portion. 24 is formed penetrating in the thickness direction, and the pivot 19 is spanned between a pair of inner wall surfaces along the feed-out direction of the through-hole 24.

  Further, a sliding member 25 along the width direction of the adhesive roll 8 is integrally provided at the lower ends of the both paper guides 17, and this sliding member 25 is a pair formed on the bottom surface of the roll housing recess 16. Each of the guide grooves 26 is slidably fitted. The guide grooves 26 are slid along the guide grooves 26 so that the two paper guides 17 can move relative to each other in the direction of approaching and separating from each other while maintaining a parallel state. .

  As described above, the swinging member 20 is mounted in the through hole 24 formed in each support member 18 via the pivot shaft 19. When the adhesive roll 8 is not inserted, the swinging member 20 is lowered by the biasing member 22. When the portion is urged and swung about the pivot shaft 19, the lower end portion protrudes inward from the inner surface of the paper guide 17 and is provided at the upper end, as shown in FIG. The tip of the support shaft 21 is positioned inside the through hole 24. Further, in a state where the adhesive roll 8 is inserted, the lower end portion of the swinging member 20 is pushed into the through-hole 24 by both ends of the adhesive roll 8, thereby providing the upper end portion of the swinging member 20. As shown in FIG. 5, the support shaft 21 is projected from the through hole 24.

  Furthermore, as shown in FIGS. 5 and 6, on the surface of each swing member 20, a thin line-shaped convex portion 27 having a substantially semicircular cross-sectional shape is formed on an extension line extending vertically downward from the support shaft 21. It is provided facing. The upper end (in the direction of the support shaft 21) of the convex portion 27 is above (at the insertion port side) at least the line connecting the rotation centers of the pivots 19 of the swinging members 20, and the inner peripheral edge of the side surface portion of the adhesive roll 8 when mounted. It is set to be above the position where it abuts against the portion 28 (adhesive label portion excluding the paper tube 15). Moreover, the lower end (the direction opposite to the support shaft 21) of the convex portion 27 is set to be lower than the position in contact with the outer peripheral edge portion 29 of the side surface portion of the adhesive roll 8 at the time of mounting. The paper guide 17 regulates the width direction of the pressure-sensitive adhesive roll 8 by making line contact with the side surface portion of the pressure-sensitive adhesive roll 8 through the convex portion 27 and positions the feeding position in the width direction.

  Moreover, the surface of this convex part 27 can further enhance the adhesion preventing effect of the adhesive when the adhesive roll 8 is attached / detached or the adhesive label continuous body 10 is fed out by performing a peeling treatment. The means for performing the peeling treatment on the surface of the convex portion 27 is not particularly limited. For example, a resin that is made to improve the peeling performance by kneading a peeling material such as a silicon compound or a fluorine compound. A resin material, a metal material, or the like that enhances the peeling performance by providing a material with fine irregularities on the surface may be used, or a combination of these may be used.

  Further, as shown in FIG. 2, the paper supply device 9 is provided with racks 30 along the bottom surface of the roll storage recess 16, and these racks 30 always have their front end portions superimposed at intervals. In this overlapping portion, a pinion 31 that meshes with both racks 30 is disposed. The pinion 31 is rotatably mounted on the bottom surface of the roll housing recess 16 via a shaft 32, so that when one paper guide 17 is slid in an arbitrary direction, the other paper The guide 17 is slid in a direction opposite to the sliding direction of the one paper guide 17 and is slid by a distance equal to the sliding amount of the one paper guide 17.

  In this embodiment, one of the paper guides 17 is provided with a locking mechanism 33 for locking the paper guide 17 at an arbitrary position along the guide groove 26 described above. As shown in FIG. 2, the locking mechanism 33 has a plurality of saw-tooth-like engagements formed in parallel with the guide groove 26 on the inner wall surface of the roll housing recess 16 at a position facing the side surface of the paper guide 17. A stop groove 34 and a stopper 35 that is attached to a portion of the paper guide 17 that faces the locking groove 34 and is engaged with and disengaged from the locking groove 34.

  A part of the stopper 35 protrudes from the side of the paper guide 17 and is tapered so as to gradually narrow in the protruding direction. By being engaged, sliding of the paper guide 17 is restricted. Further, the stopper 35 is connected to an operation portion 36 attached to the upper end portion of the paper guide 17 via an operation rod (not shown).

  By pulling the operation portion 36 attached to the upper end portion of the paper guide 17 in the direction of the thermal head 5, the stopper 35 is pulled out from the locking groove 34, thereby allowing the paper guide 17 to slide. After the paper guide 17 is slid to a predetermined position, the operation portion 36 is pushed back toward the locking groove 34 and the stopper 35 is engaged with one of the locking grooves 34, thereby restraining the sliding of the paper guide 17. Is done. Here, when the sliding of one paper guide 17 is restrained, the other paper guide 17 is connected to the one paper guide 17 by a pair of racks 30 and a pinion 31 meshed therewith. As a result, the sliding of the other paper guide 17 is also restrained.

  Next, the operation of the present embodiment configured as described above will be described. First, after pulling the operating portion 36 in the direction of the thermal head 5 to release the engagement state between the stopper 35 and the locking groove 34, the paper guide 17 is slid to set the interval between them to the adhesive roll 8 to be mounted. Adjust to the length of. At this time, both the paper guides 17 have the sliding amounts of the respective paper guides 17 equal and the sliding directions are reversed by the action of the pair of racks 30 and the pinion 31. Thus, the distance is adjusted in a state where the center position between the two paper guides 17 is kept constant. Therefore, the lengthwise center of the adhesive roll 8 mounted between the two paper guides 17 and the thermal head are adjusted. The center of 5 is always kept constant.

  After the paper guide 17 is aligned in this way, the operation portion 36 is operated again, the operation portion 36 is pushed back in the direction of the locking groove 34, and the stopper 35 provided at the end portion is locked. By engaging with one of the grooves 34, both the paper guides 17 are fixed at the positions described above. In this state, as shown in FIG. 4, the swinging member 20 attached to each paper guide 17 is urged inward by the urging member 22 so that each lower end is urged to the lower end. Is protruded between the paper guides 17, and the tip of the support shaft 21 provided at the upper end of each swing member 20 is positioned in the through hole 24 of each paper guide 17. .

  Thus, when the adhesive roll 8 is inserted between the paper guides 17 from above as shown by a chain line in FIG. 4, the swinging member 20 is moved until the lower end of the adhesive roll 8 reaches the portion of the pivot 19. The posture described above is maintained.

  When the adhesive roll 8 is further lowered, the lower end of the outer peripheral edge 29 of the adhesive roll 8 comes into contact with the convex portion 27 of each swinging member 20 along with the lowering, and the lower ends of these swinging members 20 are mutually connected. The support shaft 21 provided at the upper end portion of each swing member 20 is gradually projected between the paper guides 17 from the through holes 24 by such a swing operation. Then, the support shaft 21 is gradually inserted into the center hole of the paper tube 15 of the pressure-sensitive adhesive roll 8 that has been lowered, and the support shaft 21 is further lowered as shown in FIG. 15 is brought into contact with the inner peripheral surface at its upper end. As a result, the adhesive roll 8 is held so as to be suspended by the two support shafts 21, whereby the adhesive roll 8 is supported and the mounting is completed.

  In the insertion step, the side surface portion of the adhesive roll 8 is lowered while contacting the convex portion 27 formed on the surface of the swinging member 20 provided on the paper guide 17 at the lower end of the outer peripheral edge portion 29. Therefore, the separation label 14 is not provided on the back side of the pressure-sensitive adhesive label, and the so-called non-mounting label 14 or a cut for separating the labels is performed, but the unnecessary portion is not removed (the waste is not raised) ) Even if the pressure-sensitive adhesive roll 8 is spirally exposed on both side surfaces, such as the pressure-sensitive adhesive roll 8 with a release mount wound in a roll shape, it can be smoothly inserted.

  When printing on an adhesive label by the label printer 1 having such a paper supply device 9, the adhesive label continuous body 10 is fed out from the adhesive roll 8 mounted on the paper guide 17 and is discharged to the discharge port of the label printer 1. After the upper cover 3 is closed and locked to the lower housing 2 and the adhesive label is sandwiched between the platen roller 7 and the thermal head 5, the adhesive label is conveyed in the discharge direction by the driving force of the platen roller 7. Then, the heating element 6 of the thermal head 5 is caused to generate heat so as to perform thermal color printing on the surface of the adhesive label. Here, when the adhesive label is fed out, the convex portion 27 provided on the surface of the swinging member 20 and the side surface portion of the adhesive roll 8 come into line contact with the rotation of the adhesive roll 8. Further, the adhesive label continuous body 10 can be fed out without a large load.

  In other words, since the thin line-shaped convex portion 27 is set so as to be in contact with the inner peripheral edge portion 28 at the time of mounting, the convex portion 27 and the side surface of the adhesive roll contact each other while the adhesive label continuous body 10 is being fed. By contacting, the feeding position in the width direction of the pressure-sensitive adhesive label continuous body 10 can be consistently maintained at an appropriate position without changing. Further, the upper end of the convex portion 27 is set above the line connecting the rotation centers of the pivots 19 of the swing members 20 with respect to the inner peripheral direction, and the outer peripheral edge portion of the side surface portion of the adhesive roll 8 with respect to the outer peripheral direction. Since the position is set to exceed 29, even when the adhesive roll 8 is inserted into the paper supply device 9, even if the insertion is performed while the lower end of the paper guide 17 is opened by the lower end of the side surface of the adhesive roll 8, the convex roll It can be inserted without contacting the paper guide 17 other than the section 27. Thus, during insertion and unwinding, the convex portion 27 always abuts against the lower end of the side surface of the adhesive roll 8, so that the contact area between the paper guide 17 and the adhesive is limited to the tangent to the convex vertex on the thin line, Insertion of the adhesive roll and feeding of the adhesive label continuous body 10 can be performed smoothly without a large load.

  The various shapes, dimensions, and the like of the constituent members shown in the embodiments are merely examples, and various changes can be made based on design requirements and the like. For example, the cross-sectional shape of the convex portion is not limited to a semicircle, and the cross-sectional shape may be a trapezoid. Furthermore, the convex portions are not limited to being linear, and hemispherical convex portions may be provided at a predetermined interval. Moreover, the number of convex parts is not limited to one place, and can be provided at a plurality of places.

DESCRIPTION OF SYMBOLS 1 Label printer 2 Lower housing | casing 3 Upper cover 4 Housing | casing 5 Thermal head 6 Heat generating body 7 Platen roller 8 Adhesive roll 9 Paper supply apparatus 10 Adhesive label continuous body 11 Label base material 12 Adhesive layer 13 Release agent layer 14 Label without mount 15 paper tube 16 roll storage recess 17 paper guide 18 support member 19 pivot 20 swing member 21 support shaft 22 biasing member 23 guide surface 24 through hole 25 slide member 26 guide groove 27 convex portion 28 inner peripheral edge 29 outer peripheral edge 30 Rack 31 Pinion 32 Shaft 33 Locking mechanism 34 Locking groove 35 Stopper 36 Operation section

Claims (7)

The pressure-sensitive adhesive roll wound around the pressure-sensitive adhesive label roll has a support shaft that rotatably supports the center hole, and is arranged at intervals, and the pressure-sensitive adhesive rolls inserted from above between the both sides of the pressure-sensitive adhesive roll. A label printer comprising a pair of paper guides sandwiched between and an interlocking mechanism for moving the pair of paper guides closer to and away from each other in an axial direction of the adhesive roll,
The label printer according to claim 1, wherein the pair of paper guides have convex portions provided along the insertion direction of the pressure-sensitive adhesive roll so as to protrude from the opposing surfaces. The pair of paper guides is
A swinging member swingable with a substantially intermediate portion in the insertion direction of the adhesive roll as a fulcrum;
A biasing member that biases the lower end portions of the swinging members in a direction to approach each other;
With
The support shaft is provided in the vicinity of the upper end of the swing member, and the convex portion is provided at a position in contact with the lower end of the outer peripheral edge when the adhesive roll of the swing member is inserted. The label printer according to 1. The pivot member is provided with a pivot serving as the fulcrum of the pivot member along a direction substantially orthogonal to the axial direction and the insertion direction of the adhesive roll,
The interval between the portions supported by the pivot of the pair of paper guides is set to be slightly larger than the axial length of the adhesive roll,
The label printer according to claim 2, wherein the convex portion is provided with a support shaft side as an upper end from a line connecting the rotation centers of the pivots. As the adhesive roll is inserted in the insertion direction, the lower end of the outer peripheral edge of the adhesive roll abuts on the convex portion and swings the lower end of the swinging member away from each other.
4. The label printer according to claim 2, wherein the support shaft is protruded between paper guides, and the center hole of the adhesive roll is held by the support shaft. 5. The label printer according to claim 1, wherein the convex portion is provided in a thin line shape having a substantially semicircular cross section. 6. The label printer according to claim 1, wherein a surface of the convex portion is subjected to a peeling process. The pair of paper guides has a through hole in which the swing member is accommodated,
The support shaft is positioned in the through hole in a state where the lower end portions of the swinging member are moved closer to each other by the biasing member, and the lower end portion of the swinging member is located on the inner side of the paper guide. Projecting inward,
The lower end of the outer peripheral edge of the adhesive roll abuts on the convex portion and the lower end of the swinging member is pushed into the through hole, so that the support shaft protrudes inward from the inner surface of the paper guide and the adhesive roll 7. A label printer according to claim 2, wherein the center hole is held by a support shaft.

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