JPH0562030A - Magnetic bar code panel - Google Patents

Abstract

PURPOSE:To facilitate bar code pattern reading compared with a conventional bar code panel. CONSTITUTION:The magnetic bar code panel consists of the combination of a bar code panel 1 and an auxiliary panel 2. The bar code panel 1 is composed of a magnetic panel having a preliminarily prescribed outer dimension having holes 4 drilled at prescribed width and length arranged in parallel with each other at prescribed intervals and relative convex parts are formed between the holes 4 and 4. The auxiliary panel 2 uses a magnetic body and provided beneath the bar code panel 1. In reading the bar code pattern, by magnetizing the bar code panel 1 by getting the magnets close to each other, the auxiliary panel 2 attracts a magnetic field and a magnetic filed density in X axis near the respective right and left edges of the drilled hole 4 and a convex part 3 reads a peak value. Thus, by detecting the width, the bar code pattern can be read.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic bar code plate.

[0002]

2. Description of the Related Art Bar code systems have been widely introduced as management systems for products and parts in factories and in the distribution industry. At present, the optical bar code system is predominant, but there is a problem that the bar code label cannot be read if dust or dust is attached to it.

As a bar code resistant to such stains,
A magnetic sensing type engraved bar code having a plurality of rectangular patterns engraved in a convex or concave shape on a magnetic material is known (Abstracts of Scientific Lectures of the Japan Society for Applied Magnetics, 1987 p. 30).
7).

This is to form a bar code pattern by arranging grooves engraved with a predetermined width and length in parallel with each other at a predetermined interval on a magnetic material plate having a predetermined outer dimension (hereinafter, engraved). It is called a bar code plate) and is read by a magnetic detection element.

FIGS. 7A and 7B are a plan view and a sectional view showing an example of a conventional bar code plate, respectively. However, FIG. 7B is a cross-sectional view taken along line AB of FIG. 7A. This bar code plate 1 is formed by forming punched holes in a predetermined width and length in parallel with each other at a predetermined interval on a magnetic plate having a predetermined external dimension (hereinafter, referred to as a bar code pattern). It was called a punched bar code plate).

The stamped bar code plate is easier to process and shorter in processing time than the stamped bar code plate, but unlike the stamped bar code plate, it has no groove portion and is a punched hole. In reading the punched bar code plate, the bar code plate is magnetized by a magnet to arrange the punched holes 4 (the direction of the punched holes is defined as the X direction. Further, the direction perpendicular to the surface of the bar code plate is the Y direction. The magnetic change due to the punched hole 4 and the convex portion 3) is detected.

FIG. 6 shows a magnetic flux density distribution in the X direction at an arbitrary height on the surface of the bar code plate when the bar code plate 1 is magnetized.

From FIG. 6, since the magnetic flux density shows a peak value near the left and right edges of the punched hole 4 and the convex portion 3, respectively,
The widths of the punched holes 4 and the convex portions 3 substantially correspond to the peak-to-peak widths, and the widths of the punched holes 4 and the convex portions 3 are reproduced through the signal processing circuit.

As a result, the bar code pattern can be reproduced by reproducing the widths of the punched holes 4 and the convex portions 3, and necessary information can be obtained.

[0010]

The conventional punched bar code plate described above has a structure in which a plurality of punched holes 4 and convex portions 3 formed in a magnetic plate are arranged. These punched holes 4, The width of the peak-peak electrical change near the left and right edges of the convex portion 3 is punched out, and the convex portion 3
The width is reproduced and the barcode pattern is read.

Therefore, in order to read the bar code pattern, it is necessary that the magnetic change has a peak value in the vicinity of each of the left and right edges of the punched hole 4 and the convex portion 3.

FIG. 4 shows the distribution of lines of magnetic force generated by the die ball when the conventional bar code plate is magnetized by the magnet 5 in the Y direction. Further, FIG. 5 shows the X-direction magnetic flux density distribution at an arbitrary height on the surface of the barcode plate.

From FIG. 5, it can be seen that the change in the magnetic flux density does not show a peak value in the vicinity of each of the left and right edges of the punched hole 4 and the convex portion 3. This is because, as shown in FIG. 4, the bar code plate is easily magnetized in the X direction due to the influence of the demagnetizing field due to the shape of the protrusions 3, and therefore the adjacent protrusions are magnetically coupled in the X direction. I find it easy.

Therefore, as shown in FIG. 5, the magnetic flux density change does not show a peak value at each of the left and right edge portions of the punched hole 4 and the convex portion 3. As described above, the conventional barcode plate has a problem in that the widths of the punched holes 4 and the convex portions 3 cannot be completely reproduced, and the barcode pattern cannot be read.

An object of the present invention is to provide a magnetic bar code plate capable of reading a bar code pattern as compared with such a conventional bar code plate.

[0016]

In order to achieve the above object, a magnetic bar code plate according to the present invention is a magnetic bar code plate including a bar code plate and an auxiliary plate, wherein the bar code plate is , A plate made of a magnetic material having a predetermined outer dimension and having holes punched out with a predetermined width and length arranged in parallel at a predetermined interval, and the auxiliary plate is a magnetic material. , It is provided under the barcode plate.

[0017]

According to the present invention, the bar code plate is formed by forming holes punched with a predetermined width and length in parallel with each other at a predetermined interval in a magnetic material plate having a predetermined external dimension. ,
It realizes a magnetic bar code plate with a magnetic auxiliary plate.

A top view showing a combination of a bar code plate and an auxiliary plate constituting the magnetic bar code plate according to the present invention,
Cross-sectional views are shown in FIGS. 1 (a) and 1 (b), respectively. However, FIG. 1B is a cross-sectional view taken along the line segment AB of FIG.

When reading a bar code pattern with a magnetic sensing type stamp bar code system, basically, the magnetic bar code plate 1 is magnetized by a magnet, and the sensor changes the magnetic change generated by the resulting die ball. Perceive as minutes.

FIG. 2 shows the distribution of magnetic lines of force generated from the die ball when the magnetic bar code plate according to the present invention is magnetized with a magnet.

Further, FIG. 3 shows the magnetic flux density distribution in the X direction at an arbitrary height from the surface of the bar code plate. From FIG. 2, the magnetic field for magnetizing the bar code plate 1 is incident from the Y direction, and the auxiliary plate 2 provided below the bar code plate 1 has the effect of attracting the magnetic field.
It can be seen that the bar code plate 1 tends to be magnetized in the Y direction.

Therefore, the convex portion 3 plays a role like a magnet magnetized in the Y direction, and the magnetic flux density in the X direction near the left and right edges of the punched hole 4 and the convex portion 3 shows a peak value. .. From FIG. 3, it can be seen that the magnetic flux density has a peak value at each of the left and right edge portions of the punched hole 4 and the convex portion 3. As a result, the bar code pattern can be read by reproducing the widths of the punched holes 4 and the convex portions 3 through the signal processing circuit.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a magnetic bar code plate when an auxiliary plate 2 which is a magnetic material is installed under a bar code plate 1 which is an embodiment of the present invention. In the bar code plate 1, holes 4 punched out with a predetermined width and length are formed in parallel with each other at predetermined intervals in a magnetic material plate having a predetermined outer dimension, and the holes 4 are relatively formed. , 4 is formed with a convex portion 3 between them. In the illustrated embodiment, the bar code plate 1
Although the auxiliary plate 2 is installed so as to be in intimate contact with the lower part, it is of course possible to install the auxiliary plate 2 at a certain interval.

FIG. 4 shows the distribution of lines of magnetic force generated from the die ball when the punched bar code plate 1 having the conventional structure is magnetized by a magnet. It can be seen from FIG. 4 that the barcode plate 1 is easily magnetized in the X direction due to the influence of the demagnetizing field due to the shape of the protrusions 3, and thus the adjacent protrusions are easily magnetically coupled in the X direction. ..

On the other hand, in the configuration according to the present invention, as shown in FIG. 4, since the bar code plate 1 is easily magnetized in the Y direction, there is almost no magnetic coupling between adjacent protrusions 3.

FIG. 5 shows the magnetic flux density distribution in the X direction at an arbitrary height from the surface of the punched bar code plate having the conventional structure. From FIG. 5, punching hole 4, convex portion 3
No peak value is shown near the respective left and right edges, and it can be seen that the widths of the punched hole 4 and the convex portion 3 cannot be detected.

However, as shown in FIG. 3, since the bar code plate 1 according to the present invention shows peak values near the respective edges of the punched hole 4 and the convex portion 3, the width can be detected. As a result, the bar code pattern can be read by reproducing the widths of the punched holes 4 and the convex portions 3 through the signal processing circuit.

[0029]

As described above, according to the magnetic bar code plate of the present invention, the bar code pattern can be read as compared with the conventional bar code plate by installing the magnetic auxiliary plate. It has the effect of realizing a certain magnetic bar code plate.

[Brief description of drawings]

FIG. 1A is a top view showing a magnetic bar code plate according to the present invention, and FIG. 1B is a sectional view taken along line AB of FIG.

FIG. 2 is a diagram showing a distribution of magnetic lines of force generated from a die ball when a magnetic bar code plate according to the present invention is magnetized.

FIG. 3 is a diagram showing an X-direction magnetic flux density distribution at an arbitrary height on a magnetic bar code plate according to the present invention.

FIG. 4 is a diagram showing a distribution of magnetic force lines generated from a die ball when a bar code plate in a conventional example is magnetized.

FIG. 5 is a diagram showing an X-direction magnetic flux density distribution at an arbitrary height on a bar code plate in a conventional example.

FIG. 6 is a diagram showing a magnetic flux density distribution in the X direction at an arbitrary height on a barcode plate, and is a diagram explaining a reading principle.

7A is a top view showing a conventional magnetic bar code plate, and FIG. 7B is a sectional view taken along line AB of FIG.

[Explanation of symbols]

 1 Bar code plate 2 Auxiliary plate 3 Convex part 4 Stamped hole 5 Magnet

Claims (1)

[Claims] 1. A magnetic bar code plate comprising a bar code plate and an auxiliary plate, wherein the bar code plate is punched with a predetermined width and length from a magnetic plate having a predetermined external dimension. Magnetic bar code plate characterized in that the auxiliary plate is a magnetic material and is provided below the bar code plate. ..