JP3854032B2 - Label printer release plate and label printer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a label printer that prints and issues a predetermined content on a label sheet, and a peeling plate provided in the label printer.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a label printer that prints and issues a predetermined content on a label sheet that is affixed to a long mount. Some of such label printers are provided with a peeling plate for peeling and issuing the printed label paper from the mount.
[0003]
Here, an example of a label printer provided with a conventional peeling plate will be described with reference to FIGS. 5 is a front view of a conventional label printer 1, and FIG. 6 is a vertical right side view showing the structure of the label printer 1. As shown in FIG.
[0004]
A printing unit 3 is disposed in the paper conveyance path 2 of the label printer 1. The printing unit 3 includes a thermal head 4 and a platen roller 5. The thermal head 4 and the platen roller 5 are opposed to each other with the paper transport path 2 interposed therebetween. The thermal head 4 is rotatably supported at one end, and is biased by a biasing member 8 in a direction in which the other end is pressed against the platen roller 5. A large number of heat generating elements are arranged side by side in the paper width direction at the portion of the thermal head 4 that is in pressure contact with the platen roller 5.
[0005]
In this label printer 1, printing is performed on a label sheet L that is arranged and pasted on a long mount D. A release plate 6 that enables the label paper L to be released from the mount D and issued is disposed downstream of the platen roller 5 in the paper transport direction.
[0006]
The peeling plate 6 has two adjacent surfaces 6a and 6b that form an acute angle therebetween as an outer peripheral surface. By supporting the back surface of the mount D with the edge 6c, which is a joint between the two surfaces 6a and 6b, an acute-angle bent portion 7a is formed in the mount transport path 7. The bent portion 7a changes the transport direction of the mount D at an acute angle. The mount sheet conveyance path 7 coincides with the sheet conveyance path 2 on the upstream side from the position where the release plate 6 is provided, and is separated from the sheet conveyance path 2 on the downstream side from the position where the release plate 6 is provided. .
[0007]
Here, although the conveyance direction of the mount D changes suddenly at the bent portion 7a, the label sheet L does not follow the mount D which changes the transfer direction suddenly due to the stiffness, and deviates from the mount transfer path 7 and becomes the mount D. Peel from.
[0008]
On the other hand, the label paper L is manufactured by punching the paper into the shape of the label paper L in a state where the paper having the adhesive layer on the back surface and the mount D are overlapped. The die cutting is performed by applying a dedicated cutter to the surface of the paper and pushing the cutter close to the base D along the paper thickness direction with a force that does not cut the base D.
[0009]
As the label paper L, there is a paper using thick PET paper formed of polyethylene terephthalate (PET). The label paper L made of PET paper is used for applications such as being affixed to the housings of various products. For this reason, the adhesive force of the glue on the back surface is strengthened.
[0010]
When producing the label paper L by punching the PET paper, the PET paper is thick, and therefore the cutter is pushed out with a stronger force than when the paper made of normal paper is punched out.
[0011]
A thick paper is used for the mount D on which the label paper L made of PET paper is stuck so as not to be cut even if the cutter hits with a strong force. However, since the backing paper is thick, when the label paper made of PET paper is die-cut, the paste on the back surface of the paper is pushed into the backing paper D by the cutter so that the label paper L is made of the backing paper D. It is hard to peel off from. In addition, since the label paper made of PET paper has a stronger adhesive strength of the adhesive layer formed on the back surface than the label paper made of normal paper, the label paper is more difficult to peel off from the mount. .
[0012]
[Problems to be solved by the invention]
A problem when the label paper L is peeled off from the mount D will be described with reference to FIGS.
[0013]
When the label paper L is peeled off from the mount D, the label paper L starts to peel first from the corners at both ends in the width direction, and the center portion in the width direction starts to peel last. Thus, the central portion of the label paper L is not easily peeled off.
[0014]
FIG. 7A is a front view showing the normal release plate 6. When the label paper L is difficult to peel off from the mount such as when the label paper L is made of PET paper, conventionally, the force by which the mount D is pressed against the release plate 6 is increased.
[0015]
However, as shown in FIG. 7 (b), when the force with which the mount D is pressed against the release plate 6 becomes so strong that the release plate 6 is bent, the original is peeled off from the mount D as shown in the perspective view of FIG. Since the folding angle becomes gentle at the center in the width direction of the difficult label paper L, the label paper L becomes more difficult to peel off from the mount D, and the label paper L does not peel off and is not issued.
[0016]
An object of this invention is to make it easy to peel a label paper from a base_sheet | mounting_paper.
[0017]
[Means for Solving the Problems]
The folding device is provided in a label printer that prints and issues a predetermined content on a label sheet that is arranged and pasted on the long mount of the invention according to claim 1, and abuts the back surface of the mount of the label sheet after printing. In a peeling plate of a label printer that has a curved portion and bends the carrying direction of the mount at the bent portion to peel the label paper from the mount, the mount at the center as seen from the downstream side in the label carrying direction It is formed in the arch shape which protrudes to the side.
[0018]
Therefore, when the label sheet is peeled from the mount, the center part in the width direction of the mount is strongly pulled, and therefore the center part in the width direction of the label sheet is easily peeled off.
[0019]
According to a second aspect of the present invention, the label printer prints a predetermined content on the label paper that is attached to the long mount by the print head, and a bent portion that contacts the back surface of the mount of the label paper after printing. In the label printer provided with a release plate for bending the board transport direction at the bent portion and peeling the label paper from the mount, the release plate is viewed from the downstream side in the label paper transport direction. It is formed in an arch shape that protrudes toward the mount at the center.
[0020]
Therefore, when the label sheet is peeled from the mount, the center part in the width direction of the mount is strongly pulled, and therefore the center part in the width direction of the label sheet is easily peeled off.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the peeling plate of the label printer of the present invention will be described with reference to FIGS. FIG. 1 is a front view of the label printer 11, and FIG. 2 is a vertical right side view showing the structure of the label printer 11.
[0022]
The label printer 11 has a label issuing port 12 on the front. Although not shown, a roll paper holder is provided behind the housing 13 of the label printer 11, and a roll paper around which a long paper is wound is supported by the roll paper holder. A paper transport path 14, which is a path through which the paper is transported, is formed from the rear surface of the housing 13 to the front label issuing port 12.
[0023]
A printing unit 15 is disposed in the vicinity of the label issuing port 12 in the paper transport path 14. The printing unit 15 includes a thermal head 16 and a platen roller 17. The thermal head 16 and the platen roller 17 are opposed to each other with the paper transport path 14 in between.
[0024]
The thermal head 16 is rotatably supported at one end, and is biased by a biasing member 28 in a direction in which the other end is pressed against the platen roller 17. A number of heating elements are arranged along the paper width direction at the portion of the thermal head 16 that is in pressure contact with the platen roller 17. These heating elements are brought into direct contact with the paper if the paper is thermal paper, and an ink ribbon R is interposed between the paper and the paper if the paper is not thermal paper. When the heat generating element generates heat, printing is performed at a predetermined position on the paper.
[0025]
When used, the ink ribbon R is attached to a pair of ribbon cores 19 and 20 attached to the head block 18. Unused parts and used parts of the ink ribbon R are wound around the ribbon cores 19 and 20, respectively.
[0026]
The platen roller 17 is supported rotatably about a shaft 17a orthogonal to the paper width direction as a rotation axis. The platen roller 17 is rotationally driven by a drive source such as a motor (not shown). As the platen roller 17 rotates, the paper sandwiched between the thermal head 16 is conveyed.
[0027]
In the label printer 11, printing is performed on a label sheet L that is arranged and pasted on a long mount D. Therefore, a release plate 21 that enables the label paper L to be released from the mount D and issued is disposed on the downstream side of the platen roller 17 in the paper transport direction.
[0028]
The peeling plate 21 has two adjacent surfaces 21a and 21b that form an acute angle therebetween as an outer peripheral surface. A backing sheet pressing roller 22 is disposed below the peeling plate 21 and behind the edge 24 as a bent portion that is a joint between the two surfaces 21a and 21b.
[0029]
The mount transport path 23, which is a path through which the mount D is transported, supports the back surface of the mount D by the edge 24, and the mount D is moved downward by pressing the surface of the mount D on the back side of the mount pressing roller 22. It is formed so that the mount D is conveyed. The board conveyance path 23 is a portion of the edge 24, and the conveyance direction of the board D is bent sharply.
[0030]
When the mount D is rubbed against the edge 24, the label paper L does not follow the mount D that suddenly changes the transport direction due to the stiffness, and comes off the mount transport path 23, peels off the mount D, and enters the paper transport path 14. Along the way to the label issuing port 12.
[0031]
Here, as shown in FIG. 3, the release plate 21 of the present embodiment is formed in an arch shape that is close to the center of the mount D at the center as viewed from the downstream side in the sheet transport direction. Yes. More specifically, the peeling plate 21 is curved so that the distance between the straight line connecting both ends and the arched apex is about 1 to 2% of the length of the straight line connecting both ends. Accordingly, when the label paper L is peeled from the mount D, the center in the width direction of the mount D receives the strongest tensile force, and therefore the center in the width direction of the label paper L is easily peeled off.
[0032]
On the downstream side of the mount conveyance path 23, a mount pulling roller 25 that is rotationally driven by a motor, and a pinch roller 26 that presses the mount pulling roller 25 via the mount conveying path 23 are provided. With the mount D being sandwiched between the mount pulling roller 25 and the pinch roller 26, the mount D is rotated in the counterclockwise direction in FIG.
[0033]
A label support roller 27 that supports the label paper L from the glue surface side is provided on the downstream side of the peeling plate 21 in the paper transport path 14 so that the label paper L after being peeled from the mount D does not hang down. The label support roller 27 is formed so as to be in line contact with the glue surface of the label paper L, and is easily peeled off from the glue surface by reducing the contact area.
[0034]
In such a configuration, when printing on the label paper L, the platen roller 17 is driven to rotate, and the heating element included in the thermal head 16 is heated while feeding the label paper L affixed to the mount D, The label paper L is printed.
[0035]
When the label paper L is not peeled off from the mount D after printing, the mount D is discharged from the label issuing port 12 together with the label paper L.
[0036]
When the label paper L is peeled off from the mount D and issued, the mount D is transported along the mount transport path 23 and the tip of the mount D is sandwiched between the mount pulling roller 25 and the pinch roller 26. Then, with the rotation of the platen roller 17 during printing on the label paper L, the mount pulling roller 25 is rotated to pull the mount D. Thus, when the mount D is rubbed against the edge 24, the label paper L is peeled off from the mount D and is issued from the label issuing port 12.
[0037]
Here, even if the label paper L is made of PET paper, and the label paper L is not easily peeled off from the mount D, the peeling plate 21 is formed in an arch shape, so that the central portion in the width direction that is particularly hard to peel off is strongly pulled. (See FIG. 3A). And even if the peeling plate 21 bends because the board D is strongly pulled (see FIG. 3B), the peeling plate 21 is originally formed in an arch shape, so that the central portion of the peeling plate 21 is from both ends. It is hard to happen that it becomes low. Therefore, according to the peeling plate 21 of the present invention, as shown in FIG. 4, both end portions of the label paper L that is easily peeled off from the mount D and the central portion of the label paper L that is not easily peeled off from the mount D are peeled off substantially simultaneously. The label paper L that is difficult to peel off from the mount D can be peeled and issued satisfactorily.
[0038]
【The invention's effect】
Since the peeling plate of the label printer according to the first aspect of the present invention is formed in an arch shape that protrudes toward the mount at the center when viewed from the downstream side in the sheet conveying direction, when peeling the label from the mount, Since the center part in the width direction can be pulled strongly, the center part in the width direction of the label sheet can be easily peeled off. In addition, since the release plate of the present invention is formed in an arch shape, even if the release plate may be bent due to strong tension of the mount, the center portion of the release plate may be lower than both ends. Because it is difficult, it is possible to perform the release issue even for label paper that is difficult to peel off from the mount.
[0039]
Since the label printer of the invention according to claim 2 includes the release plate formed in an arch shape that protrudes toward the mount side at the center when viewed from the downstream side in the paper transport direction, when peeling the label paper from the mount, Since the central part in the width direction of the mount can be pulled strongly, the central part in the width direction of the label paper can be easily peeled off. Further, in the present invention, since the release plate is formed in an arch shape, even if the release plate may be bent due to the tension of the backing sheet, the central portion of the release plate is lower than both ends. Because it is difficult, it is possible to perform the release issue even for label paper that is difficult to peel off from the mount.
[Brief description of the drawings]
FIG. 1 is a front view of a label printer using a release plate of a label printer according to an embodiment of the present invention.
FIG. 2 is a vertical right side view showing the structure of the label printer.
3A is a front view showing a normal release plate, and FIG. 3B is a front view showing a bent release plate.
FIG. 4 is a perspective view showing a label sheet that is peeled off from the mount.
FIG. 5 is a front view of a label printer using a peeling plate of a conventional label printer.
FIG. 6 is a vertical right side view showing the structure of the label printer.
7A is a front view showing a normal release plate, and FIG. 7B is a front view showing a bent release plate.
FIG. 8 is a perspective view showing a label sheet that is peeled off from the mount.
[Explanation of symbols]
11 Label printer 21 Peeling plate 24 Bending part D Mount L Label paper

Claims (2)

It is provided in a label printer that prints and issues a predetermined content on a label sheet that is affixed side by side on a long mount, and has a bent portion that abuts the back side of the mount of the label sheet after printing. In the peeling plate of the label printer for peeling the label paper from the mount by bending the transport direction of the mount at the curved part,
A release plate for a label printer, characterized in that it is formed in an arch shape that protrudes toward the mount at the center when viewed from the downstream side in the label paper transport direction. A predetermined content is printed on the label paper that is arranged and pasted on the long mount by the print head, and the back of the mount of the label paper after printing has a bent portion. In a label printer including a release plate for peeling the label paper from the mount by bending the transport direction of
The label printer according to claim 1, wherein the release plate is formed in an arch shape that protrudes toward the mount at the center as viewed from the downstream side in the label paper transport direction.

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