JP5613703B2 - Label peeling device - Google Patents

Description

  The present invention relates to a label peeling apparatus for peeling a label and a mount.

  FIG. 20 is a perspective view of a label printer in the conventional example of FIG. 20, a perspective view of the label peeling device in the conventional example of FIG. 21, and a label in the conventional example of FIG. This will be described with reference to a cross-sectional explanatory view showing the configuration of the peeling apparatus.

In FIG. 20, the label printer 101 includes a thermal head 103 on an upper cover 106, and a platen roller 104 and a roll paper holder 105 in a housing 102.
The roll paper holder 105 that holds the roll-shaped print medium can be moved and adjusted in the scanning direction depending on the width of the print medium, and the boss portion of the roll paper holder 105 is fitted and held on the core around which the print medium is wound. ing.

  The upper cover 106 can be rotated by a support portion of the housing 102 and opens and closes. Accordingly, the thermal head 103 comes into contact with and separates from the platen roller 104. The leading end of the printing medium loaded in the roll paper holder 105 is pulled out of the casing 102 from the platen roller 104 and the upper cover 106 is closed, so that the drawn printing medium is sandwiched between the thermal head 103 and the platen roller 104. When the platen roller 104 rotates, the print medium is conveyed, and the thermal head 103 is configured to print on the print medium with a predetermined print pressure.

Usually, in a label printer having such a configuration, a label continuous body (hereinafter referred to as “label”) in which a label having a predetermined length is pasted as a print medium on a long strip of backing paper (release paper). Paper ").
Therefore, the label printer is provided with a label peeling device 120 for peeling the mount 111 and the label 112 as shown in FIGS.

  Such a label peeling device 120 is disposed downstream of the platen roller 104 in the paper feeding direction, and includes a peeling member 107, a pressing roller 108, and a front cover 109. The peeling member 107 is disposed so as to come into contact with the label paper 110 conveyed by the platen roller 104 at a predetermined angle so that the label 112 is peeled off from the mount 111 and only the mount 111 is guided to the platen roller 104. It is configured. The pressing roller 108 is rotatably attached to the front cover 109, and is configured to press the mount 111 guided from the peeling member 107 against the platen roller 104 with a predetermined pressing force while being rotated.

Then, when the label paper 110 printed on the label 112 by the thermal head 103 is conveyed by the platen roller 104 and passes through the peeling member 107, the label 112 is peeled off from the mount 111 and directly along the label discharge path. It is transported out of the device.
On the other hand, the mount 111 is conveyed to the outside of the apparatus along the mount discharge path while being bent with respect to the label 112 by the peeling member 107 and pressed against the platen roller 104 by the pressing roller 108.
Thus, the conventional label peeling apparatus peels the printed label from the mount.

  In addition, a driving roller as a pressing roller is provided in the rotatable opening / closing section, and the label paper is sandwiched and conveyed by the driving roller and a driven roller provided in the label printer, and the label printed by the thermal head is labeled. Some are made to peel from paper with a peeling member (for example, refer patent document 1).

JP 2007-145527 (paragraph “0023” to paragraph “0029”, FIGS. 2 and 3)

However, in the conventional technology described above, when using the label peeling device, the leading end of the label paper sandwiched between the platen roller and the thermal head is passed between the pressing roller and the platen roller (or driven roller), and It is necessary to load the label paper by closing the front cover (opening / closing part) while pulling the leading edge of the label paper along the discharge path below the front cover, etc. There is a problem that the paper is loosened, the peeling member cannot contact the label paper at a sufficient angle, and the label cannot be peeled off from the mount.
An object of the present invention is to solve such a problem, and an object of the present invention is to ensure that the label can be reliably peeled off from the mount even when the tension of the label paper is weak when the label paper is loaded. .

Therefore, in the label peeling apparatus that peels and transports the label and the mount, the present invention provides a transport roller that transports the mount, a label peeling portion that is provided downstream of the transport roller and bends the transported mount, An opening / closing cover provided rotatably, and a pressing roller provided on the opening / closing cover and pressed against the conveying roller with the mount interposed downstream of the label peeling portion when the opening / closing cover is closed. In accordance with the operation of closing the opening / closing cover, the mount is stretched between the label peeling portion and the pressing roller, and the label peeling portion is provided so as to be rotatable coaxially with the transport roller. The protrusion formed on the support member is supported by the cam portion provided on the opening / closing cover and moves .

  The effect of the present invention as described above is that the label can be reliably peeled off from the mount.

The perspective view of the label peeling apparatus in 1st Example, and a label printer Schematic cross-sectional explanatory drawing of the label peeling apparatus in the first embodiment Explanatory drawing of operation | movement of the label peeling apparatus in 1st Example Explanatory drawing of operation | movement of the label peeling apparatus in 1st Example The perspective view of the label peeling apparatus in 2nd Example, and a label printer The perspective view of the label printer of the state which closed the front cover in 2nd Example. Explanatory drawing of the peeling member and torsion spring in 2nd Example Explanatory drawing of the front cover and the pressing roller in the second embodiment Explanatory drawing of the axis | shaft of the pressing roller in 2nd Example Explanatory drawing of the hole of the front cover in 2nd Example Explanatory drawing of operation | movement of the label peeling apparatus in 2nd Example. Explanatory drawing of operation | movement of the label peeling apparatus in 2nd Example. Explanatory drawing of operation | movement of the label peeling apparatus in 2nd Example. Explanatory drawing of the operation | movement from which the slack of the printing medium in a 2nd Example is removed Explanatory drawing of the operation | movement from which the slack of the printing medium in a 2nd Example is removed Explanatory drawing of the operation | movement from which the slack of the printing medium in a 2nd Example is removed Explanatory drawing of the operation | movement from which the slack of the printing medium in a 2nd Example is removed Explanatory drawing of the operation | movement from which the slack of the printing medium in a 2nd Example is removed Explanatory drawing of the operation | movement from which the slack of the printing medium in a 2nd Example is removed The perspective view of the label printer in a prior art example The perspective view of the label peeling apparatus in a prior art example Cross-section explanatory drawing which shows the structure of the label peeling apparatus in a prior art example

  Embodiments of a label peeling apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a label peeling apparatus and a label printer in the first embodiment, and FIG. 2 is a schematic cross-sectional explanatory view of the label peeling apparatus in the first embodiment.
In FIG. 1, reference numeral 20 denotes a label printer, which is a continuous label body in which labels of a predetermined length are affixed at regular intervals on a long strip-shaped mount (release paper) loaded in a label paper holder (not shown). A label sheet as a printing medium is printed on the label while being conveyed, and the printed label and the base sheet are peeled off, conveyed outside the apparatus, and discharged.
Reference numeral 30 denotes a label peeling mechanism as a label peeling device, which is a part for peeling and transporting the printed label and the mount.

  A casing 13 as a main body of the label printer 20 includes a platen roller 3 as a conveying roller that rotates counterclockwise in FIG. 2 by a combination of a motor and a gear train (not shown) and conveys a print medium, and a platen roller. 3, a plate-like release member 4 for bending the conveyed print medium at a predetermined angle to release the label on the label paper and the mount, and a gear surface 10 on which a gear is formed, A front cover 2 serving as an opening / closing cover that is provided so as to be rotatable at a front fulcrum of the housing 13 and that is opened and closed when a printing medium is loaded into the label peeling mechanism 30, and is rotatable at a fulcrum at the rear of the housing 13 An upper cover (not shown) is attached.

As shown in FIGS. 1 and 2, the front cover 2 is provided with a pressing roller 1 having a peripheral surface formed of a rubber material or the like as a high friction member so as to be rotatable about a shaft 6. In the closed state, the peripheral surface of the pressing roller 1 is pressed against the peripheral surface of the platen roller 3, and only the label sheet mount from which the label is peeled is sandwiched between the pressing roller 1 and the platen roller 3, and the mount is It is comprised so that it may convey.
The label peeled off from the label paper is discharged from an opening formed between the upper part of the front cover 2 and the housing 13, and the mount from which the label has been peeled is formed between the lower part of the front cover 2 and the housing 13. It is discharged out of the apparatus through an opening formed therebetween.

  A gear (gear) 5 is formed at one end of the shaft 6 to which the pressing roller 1 is attached, and the gear 5 and a housing 13 are arranged on a circumference around the shaft 7 as a rotation fulcrum of the front cover 2. The gear surface (gear surface) 10 formed in the portion is in a positional relationship such that it contacts and meshes with each other, and the pressing roller 1 is rotationally driven with the opening / closing operation of the front cover 2.

  Therefore, as shown in FIG. 2, when the front cover 2 is turned in the direction indicated by the arrow A in the drawing and closed, the gear 5 of the shaft 6 meshes with the gear surface 10 provided on the housing 13, and the front cover 2 is closed. The pressing roller 1 fixed to the shaft 6 and attached to the shaft 6 is rotated in the direction of conveying the print medium indicated by the arrow B in the drawing in accordance with the rotating operation. At this time, since the pressing roller 1 is fixedly attached to the shaft 6, the pressing roller 1 rotates only in the direction indicated by the arrow B in the figure, and does not rotate in the opposite direction.

  Further, as shown in FIG. 2, a groove 9 is formed on the platen roller 3 side of the member on which the gear surface 10 is formed, and the front cover 2 is closed and the pressing roller 1 contacts the peripheral surface of the platen roller 3. In this state, the gear 5 moves to the space formed by the groove 9 and the meshing with the gear surface 10 is released. By releasing the meshing between the gear 5 and the gear surface 10 in this manner, the pressing roller 1 attached to the shaft 6 on which the gear 5 is formed rotates following the rotation of the platen roller 3.

  Since the peripheral surface of the pressing roller 1 is in contact with the peripheral surface of the platen roller 3 before the meshing between the gear 5 and the gear surface 10 is released, the meshing between the gear 5 and the gear surface 10 is performed. In the state in which is released, the pressing roller 1 is prevented from rotating counterclockwise in the figure by the platen roller 3 so that the printing medium sandwiched between the pressing roller 1 and the platen roller 3 is not loosened.

A thermal head 11 as a print head is attached to an upper cover (not shown), and the thermal head 11 comes into contact with and separates from the platen roller 3 as the upper cover rotates. The thermal head 11 is in contact with the platen roller 3 via the printing medium when the upper cover is in a closed state, and is biased by a biasing member such as a spring (not shown) with a predetermined pressing force.
Printing on the label paper is performed by applying energy according to image data or the like to a heating element (not shown) arranged in the longitudinal direction of the thermal head 11 and directly or indirectly via an ink ribbon. .

  As described above, the label printer 20 includes an upper cover (not shown), a label paper holder, the thermal head 11, the platen roller 3, the housing 13, the label peeling mechanism 30, and the like. The label peeling mechanism 30 includes the pressing roller 1, the front cover. 2, a platen roller 3, a peeling member 4, a gear 5, a gear surface 10, and the like.

The operation of the above configuration will be described.
2, 3 and 4 are schematic cross-sectional explanatory views of the label peeling apparatus in the first embodiment, and each figure shows the operation of the label peeling apparatus in the first embodiment.
In FIG. 2, the label paper 12 is sandwiched between the thermal head 11 and the platen roller 3, the label paper 12 is held, and after the label paper 12 is set for printing, the label paper 12 to the label peeling mechanism is finished. The state is shown in which the front cover 2 is opened to set the.

At this time, the label paper 12 is sandwiched between the thermal head 11 and the platen roller 3 and does not move in the main scanning direction or the sub-scanning direction. Further, the label paper 12 contacts the pressing roller 1 by the stiffness (rigidity) of the label paper 12 itself after contacting the peeling member 4 disposed on the downstream side with respect to the printing direction of the thermal head 11 and the platen roller 3. It will be in the state.
In this state, the front cover 2 is rotated about the shaft 7 in the direction indicated by the arrow A in the figure, and the gear 5 meshing with the gear surface 10 formed on the housing 13 is illustrated with the shaft 6 as the center. It rotates in the direction indicated by the middle arrow B.

Accordingly, the gear 5 rotates in the direction indicated by the arrow B in the figure in conjunction with the pressing roller 1. Note that the combination of the gear 5 and the gear surface 10 is an open mechanism for increasing the speed, and the pressing roller 1 is indicated by the arrow B in the figure only by slightly rotating the front cover 2 in the direction indicated by the arrow A in the figure. Rotate greatly in the direction. Further, by making the diameter of the pressing roller 1 larger than the diameter of the gear 5, a large amount of movement is obtained.
The pressing roller 1 exerts a force in the pressing direction (the direction indicated by the arrow D in the figure) against the label paper 12, and the reaction force in the direction indicated by the arrow E in the figure due to the stiffness of the label paper 12 A frictional force is generated during

  The label paper 12 is pulled in the direction indicated by the arrow C in the drawing by the frictional force generated between the pressing roller 1 and the label paper 12 and the rotation of the pressing roller 1 in the direction indicated by the arrow B in the drawing. Is removed from the portion sandwiched between the thermal head 11 and the platen roller 3 to the portion where the pressing roller 1 and the label paper 12 are in contact with each other.

  FIG. 3 shows a state in which the platen roller 3 and the pressing roller 1 are in contact via the label paper 12. At this time, the frictional force generated between the pressing roller 1 and the label paper 12 becomes the largest, and the printing medium indicated by the arrow C in the figure between the peeling member 4 and the pressing roller 1 is more effective. Is pulled in the direction of conveyance. Thereby, the tension | tensile_strength of the label paper 12 required in order to peel a label from the label paper 12 can be obtained.

  FIG. 4 shows a state where the setting of the label paper 12 to the label peeling mechanism is completed and the front cover 2 is closed. At this time, the gear 5 is located above the groove 9 of the extension portion of the gear surface 10 formed in the housing 13 and is not engaged with the gear surface 10. As a result, the pressing roller 1 changes from the movable roller to the driven roller so that only the rotation of the platen roller 3 is driven. By converting to a driven roller, the label paper 12 sandwiched between the platen roller 3 is discharged.

  As described above, in the first embodiment, with the closing operation of the front cover, the pressing roller that feeds the printing medium that comes into contact in the downstream direction in the transport direction is provided, so that the user can pull the end of the mount. There is no need to set it, and the print medium is pulled and loosened just by setting the print medium in the peeling mechanism and closing the front cover, so that a sufficient angle with the print medium can be obtained at the peeling member. The effect that the label can be reliably peeled from the mount is obtained.

FIG. 5 is a perspective view of the label peeling apparatus and the label printer in the second embodiment, and FIG. 6 is a perspective view of the label printer with the front cover closed in the second embodiment. FIG. 5 shows a state where the front cover is opened when the print medium is set in the label peeling mechanism, and FIG. 6 shows a state where the front cover is closed. When printing on label paper, the front cover 2 of the label printer 20 is closed as shown in FIG.
Note that parts similar to those of the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

In FIG. 5, a housing 13 of the label printer 20 has a thermal head 11 provided on an upper cover (not shown) that can rotate at a fulcrum behind the housing 13 and a thermal head 11 that is disposed opposite the thermal head 11 and is not shown. A platen roller 3 that rotates according to a combination of the gear train and conveys the print medium, a bush 17 for supporting the platen roller 3, and a thermal head 11 and the platen roller 3 are positioned downstream of the print direction, A peeling member 4 for bending the print medium at a predetermined angle to peel off the label and the mount on the label paper, and a front cover 2 that opens and closes when the print medium is loaded into the label peeling device 30 are attached. .
The front cover 2 that opens and closes when setting a print medium includes a pressing roller 1, a shaft 6 that rotatably supports the pressing roller 1, a hole 14 for supporting the shaft 6, a guide 15 that guides the shaft 6, and The cam part 2a in which the inclined surface was formed is attached and comprised.

The peeling member 4 is rotatably attached to the bush 17 via support members that support both side portions, and the support members on both sides are provided with protrusions 18. When the front cover 2 is closed, each protrusion 18 is connected to the front cover 2. The cam plate 2a contacts the inclined surface of the cam portion 2a provided on both side portions of the platen roller 3 and rotates about the same axis as the rotation axis of the platen roller 3.
Further, the peeling member 4 rotatably attached to the bush 17 is urged by the torsion spring 16 in the downstream direction in the print medium conveying direction.

  FIG. 7 is an explanatory view of a peeling member and a torsion spring in the second embodiment. In FIG. 7, the peeling member 4 is rotatably attached to the bush 17 and connected to the bush 17 by a torsion spring 16, so that it is always in the downstream direction in the print medium conveyance direction (the direction indicated by arrow F in the figure). Is being energized.

  FIG. 8 is an explanatory diagram of the front cover and the pressing roller in the second embodiment. In FIG. 8, a guide 15 for guiding the shaft 6 of the pressing roller 1 provided on the front cover 2 has a pressing spring 19 when the shaft 6 of the pressing roller 1 is in the direction indicated by the arrow G, that is, when the front cover 2 is closed. The pressing roller 1 is attached so as to be biased in a direction in which the pressing roller 1 is pressed against a platen roller 3 (not shown).

FIG. 9 is an explanatory view of the shaft of the pressing roller in the second embodiment, and FIG. 10 is an explanatory view of the hole of the front cover in the second embodiment.
In FIG. 9, a D-cut portion 6a is formed at the end of the shaft 6 of the pressing roller so as to form a substantially D shape.

  In FIG. 10, a hole 14 provided in the front cover 2 for supporting the shaft 6 is formed in a substantially long hole shape so that the shaft 6 biased by a not-shown push spring 9 can move. A flat surface portion 14 a is formed at one end in the direction urged by the pressing spring 9. The flat portion 14a of the hole 14 is in a positional relationship to contact the D-cut portion 6a formed on the shaft 6 to be supported, and the D-cut portion 6a of the shaft 6 is moved to the flat portion 14a of the hole 14 by a push spring 19 (not shown). When biased in the abutting direction, the rotation of the shaft 6 is restricted.

The operation of the above configuration will be described.
11, 12 and 13 are explanatory views of the operation of the label peeling apparatus in the second embodiment.
FIG. 11 shows a state in which the front cover 2 is opened and label paper is set. In FIG. 11, the peeling member 4 rotatably attached to the bush 17 is biased in the direction indicated by the arrow H by the torsion spring 12, and the shaft 6 of the pressing roller 1 is biased by the pressing spring 19, The 14 flat portions 14a and the D-cut portion 6a of the shaft 6 are in contact with each other and are not rotated.

When the front cover 2 is closed after the front cover 2 shown in FIG. 11 is opened, the cam portion 2a of the front cover 2 comes into contact with the protrusion 18 provided on the support portion of the peeling member 4 as shown in FIG. The protrusion 18 is pressed by the inclined surface of the cam portion 2 a, and the peeling member 4 rotates in the direction indicated by the arrow J against the force of the torsion spring 16.
Also at this time, the pressing roller 1 does not rotate because the D-cut portion 6a of the shaft 6 is pressed against the flat portion 14a of the hole 14 of the front cover 2 by the pressing spring 19.

  Further, when the front cover 2 is closed, the front cover 2 is completely closed as shown in FIG. 13, and when the front cover 2 is closed, the pressing roller 1 and the platen roller 3 are in contact with each other. Touch and interfere. The shaft 6 moves in the direction indicated by the arrow K by this amount of interference. As a result, the D-cut portion 6a of the shaft 6 and the flat portion 14a of the hole 14 are separated from the force of the pressing spring 19, so that the shaft 6 can rotate within the hole 14 and the pressing roller 1 can rotate.

Next, an operation for removing the slack of the loaded printing medium will be described with reference to FIGS.
FIG. 14 shows a state in which the front cover 2 is opened to set the label paper 12 on the label peeling mechanism after the label paper 12 is set between the thermal head 11 and the platen roller 3 for printing. ing.

  At this time, the label paper 12 does not move between the thermal head 11 and the platen roller 3. 11 and 12, the peeling member 4 rotatably attached to the bush 17 is urged in the direction indicated by the arrow L in the figure by a torsion spring 16 (not shown), and the shaft 6 of the pressing roller 1 is The flat spring portion 14a of the hole 14 and the D-cut portion 6a of the shaft 6 are brought into contact with each other by a push spring 19 (not shown) so as not to rotate.

FIG. 15 shows a state in which the front cover 2 is slightly closed and the cam portion 2a of the front cover 2 and the protrusion 18 of the peeling member 4 are in contact with each other.
In FIG. 15, the cam portion 2a of the front cover 2 and the protrusion 18 of the peeling member 4 come into contact with each other, and the peeling member 4 starts to rotate in the direction indicated by the arrow M in the figure.
At this time, the label paper 12 is lifted by the rotation of the peeling member 4 but is not pulled because it is not in contact with the pressing roller 1.

FIG. 16 shows a state where the front cover 2 is further closed than in FIG.
At this time, the pressing roller 1 that does not rotate and the label paper 12 come into contact with each other, and due to the frictional force caused by this contact and the force that rotates the peeling member 4 away from the pressing roller 1 in the direction of the arrow M in FIG. By moving 4 away from the pressing roller 1, the label paper 12 is pulled between the pressing roller 1 and the peeling member 4, and the slack is removed.

17 and 18 show a state where the front cover 2 is further closed as compared with FIG.
Also at this time, as described above, the slack of the label paper 12 between the pressing roller 1 that does not rotate and the peeling member 4 is removed.
FIG. 19 shows a state in which the front cover 2 is completely closed and the setting of the label paper 12 to the label peeling mechanism is finished.

At this time, the slack of the label paper 12 from the portion where the label paper 12 is sandwiched between the thermal head 11 and the platen roller 3 to the portion where the label paper 12 is sandwiched between the pressing roller 1 and the platen roller 3 is loosened. The bending of the label paper 12 with respect to the peeling member 4 sufficient to be removed and the label peeled off from the label paper 12 can be obtained.
Further, the pressing roller 1 and the platen roller 3 come into contact with each other to interfere with each other, the D-cut portion 6a of the shaft 6 and the flat portion 14a of the hole 14 are separated from each other, and the pressing roller 1 becomes rotatable. Thus, when the pressing roller 1 becomes a driven roller, the pressing roller 1 and the platen roller 3 function to discharge the label paper 12.

  As described above, in the second embodiment, the pressing roller that restricts the movement of the print medium that is in contact by the closing operation of the front cover, and the pressing roller that is in contact with the print medium whose movement is restricted by the pressing roller. By providing a peeling member that rotates in a direction away from the user, the user does not need to set the paper while pulling the end of the mount, and the print medium is pulled only by setting the print medium on the peeling mechanism and closing the front cover. Since the slack is removed, a sufficient angle between the peeling member and the print medium can be obtained, and the label can be reliably peeled from the mount of the print medium.

In the first embodiment and the second embodiment, the example in which the present invention is applied to a label printer has been described. However, the present invention is not limited to this, and the present invention is not limited to all printers or label peeling using a label as a printing medium. Applicable to mechanism.
Further, the configuration of the first embodiment may be combined with a peeling member that rotates in a direction away from the pressing roller while abutting against the print medium in accordance with the closing operation of the front cover that is the configuration of the second embodiment. Is possible.

DESCRIPTION OF SYMBOLS 1 Pressing roller 2 Front cover 3 Platen roller 4 Peeling member 5 Gear 6, 7 shaft 8 Platen shaft 9 Groove 10 Gear surface 11 Thermal head 12 Label paper 13 Housing | casing 14 Hole 15 Guide 16 Torsion spring 17 Bush 18 Protrusion 19 Push spring 20 Label printer 30 Label peeling mechanism

Claims (2)

In a label peeling device that peels and transports labels and mounts,
A transport roller for transporting the mount,
A label peeling portion that is provided downstream of the transport roller and bends the transported mount;
An opening / closing cover provided rotatably,
A pressing roller that is provided on the opening / closing cover and is pressed against the conveying roller with the mount interposed downstream of the label peeling portion when the opening / closing cover is closed;
With the operation of closing the opening / closing cover, the label peeling portion moves in a direction away from the pressing roller, and the mount is stretched between the label peeling portion and the pressing roller,
The label peeling portion is rotatably provided coaxially with the transport roller and supported by a support member, and a protrusion formed on the support member abuts on a cam portion provided on the opening / closing cover and moves. Characteristic label peeling device. In the label peeling apparatus of Claim 1,
The cam portion includes a long hole that supports the shaft of the pressing roller and has a flat portion formed at an end thereof.
The shaft of the pressing roller is formed with a D-cut portion at an end, and is biased by a biasing means in a direction in which the D-cut portion abuts on the flat surface portion,
When closing the opening / closing cover, the rotation of the pressing roller is restricted by bringing the D-cut portion and the flat portion into contact with each other,
When the open / close cover is closed, the pressing roller comes into contact with the conveying roller, so that the shaft of the pressing roller moves to release the contact between the D-cut portion and the flat portion, and the pressing roller A label peeling device characterized by being rotatable.

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