JPH0120128Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to a label printer.

[Technical background of the invention and its problems]

Conventionally, there have been label printers that print on the labels while intermittently feeding a long backing paper with a large number of labels pasted on it, and then peel the labels from the backing paper by bending the backing paper at an acute angle with a label peeling plate and pulling out the backing paper. Exists. Many of these types have a structure in which the ink ribbon is inserted between the print head and the label, but because the gap between the tip of the print head and the label peeling plate is small, the ink ribbon can be inserted into the label without any printing operation. come into contact with. Labels are strong, but many have lower water absorption than plain paper, and the disadvantage is that ink adhering to the label rubs against ribbon guides and the like while the label is being fed, causing stains over a long area.

For this reason, there are devices in which a ribbon mask is provided outside the ink ribbon to prevent the ink from the ink ribbon from adhering to the label. However, in such a ribbon mask, since the opening is small only at the tip of the print head, the ink immediately after printing on the label comes into contact with the outer surface of the ribbon mask, which causes the printed ink to come into contact with the outer surface of the ribbon mask. There is a problem that the ribbon mask gets rubbed and gets dirty.
There is also the problem that the leading edge of the label that is peeled off from the mount may catch on the edge of the opening in the ribbon mask.

[Purpose of invention]

The purpose of this invention is to provide a label printer that can prevent labels from becoming dirty and can also smoothly feed labels.

[Summary of the idea]

This idea includes a label peeling body that bends the mount at an acute angle in the path of a long mount on which many labels are pasted at equal pitches, and a print head that has a ribbon guide at the tip to guide the ink ribbon. attaching to the printing head a ribbon mask that is provided opposite to the label peeling body, has a relief portion formed by a hole facing the tip of the printing head, and is positioned between the label peeling body and the ribbon guide;
The distance from the center of the tip of the printing head to one edge of the relief portion corresponding to the label feeding direction is set to be larger than the distance from the center of the tip of the printing head to the tip of the label peeling body. Therefore, the ribbon mask prevents the ink ribbon itself from coming into contact with the label, and the distance from the center of the tip of the printing head to one edge of the relief part corresponding to the label feeding direction is calculated from the tip of the printing head. By setting the distance from the center to the tip of the label peeling body, the distance is set to be larger than the distance from the center to the tip of the label peeling body, so that the ink immediately after printing does not come into contact with the ribbon mask and cause stains, and the tip of the label is set to the edge of the ribbon mask. The material can be fed out smoothly without getting caught on the edge of the material.

[Example of idea]

An embodiment of this invention will be explained based on the drawings.
Reference numeral 1 denotes a mount that is wound into a roll and held by a label holder 2. This mount 1 is pulled out between a plate-shaped label peeling body 4 and a label presser 3, and furthermore, the tip of the label peeling body 4 bent at an acute angle is inserted between a rubber roller 5 and a feed roller 6. , the tip thereof is further inserted into a label guide 7.

A printing head 8 for a dot printer facing the label peeling body 4 is provided so as to be movable back and forth in the width direction of the mount 1. At the tip of this print head 8 is a ribbon guide 10 that guides the ink ribbon 9.
is provided. Both ends of this ink ribbon 9 are wound around a ribbon spool 11. A plate-shaped ribbon mask 13 having a relief part 12 formed by a hole is attached to the ribbon guide 10. This relief part 12 releases the tip of the print head 8, and the length of this relief part 12 corresponding to the label feeding direction is longer than the distance a from the center of the tip of the print head 8 to the tip of the label peeling body 4. The distance b from the center of the tip of the print head 8 to one end edge of the relief portion 12 is set to be larger. Further, near the tip of the label peeling body 4, a label detector 14 using a photoelectric conversion element is provided.

In such a configuration, the print head 8 is driven by the print command signal, thereby printing the label 15.
is printed on. Next, the mount 1 is pulled out by a certain length by the rubber roller 5 and the feed roller 6.
At this time, the label 15 is peeled off from the mount 1 because the mount 1 is bent at an acute angle by the tip of the label peeling body 4.

Printing on the label 15 is performed in this manner, but since the ink ribbon 9 is supported by the ribbon guide 10 and the opposite side is pressed by the ribbon mask 13, it does not loosen and comes into contact with the label 15. There isn't. Only the portion of the printing head 8 where the dot wire protrudes and strikes the ink ribbon 9 against the label 15 at the relief portion 12 contacts the label 15. Therefore, it is possible to prevent the label 15 from becoming dirty. The label 15 attached to the mount 1 is pulled by the mount 1 when the mount 1 is bent and pulled out, and is warped in the direction away from the ribbon mask 13 from the extended surface of the label peeling body 4. Therefore, by setting the dimensions of the relief portion 12 such that a<b, the printed ink will not be rubbed on the ribbon mask 13, and the leading edge of the label 15 to be peeled off from the mount 1 will be in the relief portion 12. It won't get caught on the edges.

[Effect of idea]

This idea includes a label peeling body that bends the mount at an acute angle in the path of a long mount on which many labels are pasted at equal pitches, and a print head that has a ribbon guide at the tip to guide the ink ribbon. attaching to the printing head a ribbon mask that is provided opposite to the label peeling body, has a relief portion formed by a hole facing the tip of the printing head, and is positioned between the label peeling body and the ribbon guide;
Since the distance from the center of the tip of the printing head to one edge of the relief part corresponding to the label feeding direction is set larger than the distance from the center of the tip of the printing head to the tip of the label peeling body, the ink ribbon can be removed by the ribbon mask. In addition to preventing the label itself from coming into contact with the label, it also prevents the ink immediately after printing from coming into contact with the ribbon mask and causing stains, and also prevents the tip of the label from getting caught on the edge of the ribbon mask relief. This has the effect of allowing the labels to be sent out smoothly.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure is a plan view, Figure 2 is a partially cutaway front view, Figure 3 is an enlarged plan view of the main part showing only the ribbon mask in cross section, and Figure 4 is a cross section of only the ribbon mask. FIG. 5 is an enlarged plan view of the ribbon mask, and FIG. 6 is an enlarged side view of the ribbon mask. DESCRIPTION OF SYMBOLS 1... Mounting paper, 3... Label peeling body, 8... Printing head, 9... Ink ribbon, 10... Ribbon guide, 12... Relief part, 13... Ribbon mask,
15...Label.

Claims (1)

[Scope of utility model registration request] A label peeling body that bends the mount at an acute angle is provided in the path of a long mount on which many labels are pasted at equal pitches, and a print head having a ribbon guide for guiding an ink ribbon at the tip is attached to the label peeling body. A ribbon mask is attached to the print head, and is provided opposite to the print head, has a relief portion formed by a hole facing the tip of the print head, and is located between the label peeling body and the ribbon guide, and is attached to the print head so as to correspond to the label feeding direction. The label printer is characterized in that the distance from the center of the tip of the printing head to one end edge of the relief portion is set to be greater than the distance from the center of the tip of the printing head to the tip of the label peeling body.