JP2001260445A - Label printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the paste face of a label sheet from adhering to a compositional member of a label printer. SOLUTION: In a label printer 21 having a sheet carrying passage 26 between a platen roller 31 and a thermal head 28 urged in the direction approaching the platen roller 31 and printing on a label sheet L having rear paste face, the thermal head 28 is disposed on the lower side of the sheet carrying passage 26, the platen roller 31 is disposed on the upper side of the sheet carrying passage 26, and the label sheet L is carried on the sheet carrying passage 26 while directing the print face thereof downward and the paste face thereof upward. Even if the label sheet L is slackened and the face thereof directing downward touches a member forming the sheet carrying passage 26, the label sheet L does not adhere fixedly to the sheet carrying passage 26 because the face of the label sheet L directing downward is the print face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label printer for printing and printing on label paper having a glue surface provided on the back of a printing surface.

[0002]

2. Description of the Related Art As an example of a conventional label printer,
This will be described with reference to FIG. FIG. 3 is a vertical sectional right side view showing a schematic configuration of the conventional label printer 1.

The label printer 1 includes a printer unit 3 in a housing 2 and a roll paper holder 4 on the back of the housing 2. The roll paper holder 4 holds the linerless label roll P
Is rotatably supported. The linerless label roll P
A long label paper L having a glue surface on the back of the printing surface is wound in a roll shape. At the front of the housing 2, a discharge port 5 from which the label paper L printed by the printer unit 3 is discharged
Are formed.

The printer section 3 has a paper transport path 6 through which the label paper L is transported from the rear side of the housing 2 to the paper output port 5, and a head block 7 is disposed above the paper transport path 6. It is established. The head block 7 has a thermal head 8 and a pair of ribbon cores 9 and 10. The ribbon cores 9 and 10 wind each end of the ink ribbon R to be hung on the thermal head 8.

A platen roller 11 to which the thermal head 8 is pressed is provided below the paper transport path 6. The platen roller 11 is rotationally driven by a driving mechanism such as a motor (not shown).

A tear bar 12 for manually cutting the label paper L is provided immediately before the paper discharge port 5 in the paper transport path 6. When the operator raises the issued label paper L obliquely upward, the tear bar 12 cuts the label paper L.

[0007] The conventional label printer 1 having such a structure.
Then, the platen roller 11 is driven to rotate and the label paper L
Is printed on the front surface of the label paper L by the thermal head 8 while the paper is transported.

[0008]

In the conventional label printer 1 as shown in FIG. 3, a thermal head 8 is disposed above a paper transport path 6, and the printing surface of the label paper L faces upward, The surface is facing down. For this reason, when the issued label paper L hangs down, the adhesive surface on the back side of the printing surface of the label paper L may be attached to a member around the paper discharge port 5.

Further, since the leading end of the label paper L tends to hang down due to gravity, the glue surface is covered with the platen roller 11 and the contact area between the glue surface and the platen roller 11 is reduced. growing. For this reason,
The adhesive surface is not easily peeled off from the platen roller 11, and the label paper L is easily wound around the platen roller 31.

Further, in the paper transport path 6, the label paper L
If the sheet is loosened, the glue surface may adhere to the member 6a forming the paper transport path 6, and a jam may occur. This is likely to occur when the label paper L is back-fed by reversing the platen roller 11 due to the printing position or the like.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the adhesive surface of a label sheet from sticking to a component of a label printer.

[0012]

According to a first aspect of the present invention, there is provided a label printer including a paper conveying path between a platen roller and a thermal head urged in a direction approaching the platen roller, and a printing surface for printing. In a label printer for printing on label paper having a back surface as an adhesive surface, the thermal head is disposed below the paper transport path, the platen roller is disposed above the paper transport path, and the label paper is The printing paper was conveyed along the paper conveyance path with the printing surface facing downward and the glue surface facing upward.

According to such a configuration, when the label paper is loosened, even if the downwardly facing surface of the loosened label paper is in contact with the member forming the paper transport path, the label paper is directed downward. Since the printed surface is the printing surface, the label paper does not stick to the paper transport path.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a right side view in vertical section showing a schematic configuration of a label printer 21 of the present embodiment.

The label printer 21 has a printer unit 23 in a housing 22 and a roll paper holder 2 on the back of the housing 22.
4 is provided. The roll paper holder 24 rotatably supports a linerless label roll P in which a long label paper L is wound in a roll shape with the back side of the printing surface being an adhesive surface. A paper discharge port 25 for discharging the label paper L printed by the printer unit 23 is formed on the front surface of the housing 22.

The printer section 23 includes a paper transport path 2 through which the label paper L is discharged from the rear side of the housing 22 to the paper discharge port 25.
6, a head block 27 is provided below the paper transport path 26. The head block 27 has a thermal head 28 and a pair of ribbon cores 29 and 30. Each end of the ink ribbon R wound around the thermal head 28 is wound around the ribbon cores 29 and 30.

The thermal head 28 has a large number of heating elements arranged side by side in the paper width direction.

A platen roller 31 is provided below the paper transport path 26. The platen roller 31 is provided so that its axial direction is parallel to the paper width direction, and is supported rotatably around the axis. Here, thermal head 2
8 is rotatably supported at one end, and is urged by an urging member (not shown) so as to press against the platen roller 31. The platen roller 31 is driven to rotate by a driving mechanism such as a motor (not shown).

A tear bar 32 for manually cutting the label paper L is provided immediately before the paper discharge port 25 in the paper transport path 26. When the operator pulls down the issued label paper L obliquely downward, the tear bar 32 cuts the label paper L.

In such a configuration, first, the linerless label roll P is moved to the label paper L in the paper transport path 26.
Is set in the roll paper holder 24 so that the paper is conveyed with the printing surface facing downward and the glue surface facing upward.

The label paper L is transported by the rotation of the platen roller 31. Then, printing is performed on the conveyed label paper L by the thermal head 28.

In printing, the platen roller 31 may be reversed to feed back the label paper L in order to adjust the printing position. At this time, the label paper L is loosened, and depending on the amount of looseness, the downwardly facing surface of the label paper L comes into contact with a member forming the paper transport path 26. Here, in the present embodiment, since the surface of the label paper L that faces downward is the printing surface, the paper transport path 2
The glue surface does not stick to the member forming 6 to cause a jam.

In this embodiment, since the platen roller 31 in contact with the glue surface of the label paper L is disposed above the paper transport path 26, the leading end of the label paper L hangs down due to gravity. As a result, the contact area between the glue surface and the platen roller 31 is reduced.
1 makes it easy for the glue surface to peel off. Thereby, the inconvenience that the label paper L is wound around the platen roller 31 is less likely to occur.

The label paper L after the printing is issued is cut by the tear bar 32 when the operator pulls the label paper L obliquely downward.

Next, a second embodiment of the present invention will be described with reference to FIG. Note that the same portions as those described in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The difference between the label printer 41 of the present embodiment and the label printer 21 of the previous embodiment is the presence or absence of the tear bar 32. The label printer 41 of the present embodiment does not have the tear bar 32.

In the vicinity of the paper discharge port 25 of the label printer 41, a cutter 42 is provided. A label pasting machine 43 is disposed downstream of the label pasting machine 43.

The label pasting machine 43 includes a label mounting table 44 which can be moved up and down by a driving mechanism such as a solenoid (not shown). The label mounting table 44 is located slightly below the position where the cutter 42 cuts the label paper L, and the label paper L cut by the cutter 42 is mounted on the label mounting table 44. At this time, the label paper L is held by suction or the like so as not to move on the label mounting table 44.

In such a configuration, the label mounting table 4
The label sticking position of the object to which the label paper L is to be stuck is located at a position facing 4. Then, the label paper L is printed on the label paper L by the label printer 41, the label paper L is cut by the cutter 42, and the label mounting table 44 on which the label paper L is mounted is raised, so that the label paper L is attached to the target object. I do.

[0030]

According to the present invention, the thermal head is disposed below the paper transport path, the platen roller is disposed above the paper transport path, and the label paper has its print surface facing downward and its glue surface facing upward. When the label paper is loosened, even if the downward facing surface of the loose label paper touches the member that forms the paper transport path, the label paper Since the surface facing downward is the printing surface, label paper can be prevented from sticking to the paper transport path.

[Brief description of the drawings]

FIG. 1 is a vertical right side view showing a schematic configuration of a label printer according to a first embodiment of the present invention.

FIG. 2 is a vertical right side view showing an operation example of a label printer according to a second embodiment of the present invention.

FIG. 3 is a vertical sectional right side view showing a schematic configuration of a conventional label printer.

[Explanation of symbols]

 21 Label Printer 26 Paper Transport Path 28 Thermal Head 31 Platen Roller L Label Paper

Claims (1)

[Claims] 1. A label printer for printing on label paper having a paper transport path between a platen roller and a thermal head biased in a direction approaching the platen roller and having a back surface of a printing surface as an adhesive surface, Disposing the thermal head below the paper transport path;
Disposing the platen roller above the paper transport path;
A label printer, wherein the label paper is conveyed through the paper conveyance path with its printing surface facing downward and the adhesive surface facing upward.