JP2793571B2 - Barcode reader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar code reader, and more particularly to a bar code reader for reading a bar code label affixed on a package in a non-contact manner.

[0002]

2. Description of the Related Art Conventionally, this type of bar code reader has been
It is installed above a conveyor such as a belt conveyor or at a measuring point, and is used for non-contact reading of a barcode label attached to luggage conveyed by the conveyor.

[0003] Referring to FIG. 3, which is a diagram showing a reading method by the conventional bar code reader, the conventional bar code reader scans a bar code label 4 on a package 5 with light and outputs the bar code label 4 from the bar code label 4. And a decoding unit 33 which is integrated with the scanning unit 32 and decodes the data indicated by the barcode label 4 with the barcode signal output from the scanning unit 32. And a main body 31 provided.

[0004]

In the above-described conventional bar code reader, the light is output from one scanning unit 32 to scan the bar code label 4 and receives the reflected light from the bar code label 4. When the bar code label 4 has a curved B-side with a large inclination, the reflected light b of the light scanned by the scanning unit 32 does not return to the scanning unit 32. For this reason, since the scanning unit 32 cannot output the barcode signal of the portion corresponding to the surface B of the barcode label 4, the decoding unit 33 has a problem that the data indicated by the barcode label 4 cannot be erroneously decoded or decoded.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such a conventional drawback, so that the reflected light of the light scanned by the scanning unit is not returned to the scanning unit, and the data indicated by the bar code label is erroneously decoded or decoded. An object of the present invention is to provide a bar code reading device that cannot be disabled.

[0006]

SUMMARY OF THE INVENTION A bar code reader according to the present invention is mounted on a package with a horizontal surface and an inclined surface.
The bar code label is scanned with light and receives the reflected light from the bar code label,
A plurality of scanning units each outputting a partial barcode signal corresponding to a scanned portion of the barcode label including a portion scanned on the horizontal surface or the inclined surface, and the plurality of scanning units are separately connected and connected. And a main unit for decoding the data indicated by the barcode label in response to the partial barcode signals respectively output by the plurality of scanning units.

Further, the main body of the bar code reading device of the present invention includes a decoding unit for synthesizing the partial bar code signals output from the plurality of scanning units and decoding data indicated by the bar code label. It is configured.

Further, the bar code reader of the present invention comprises a start code, a plurality of data codes and a stop code , and has a horizontal surface and an inclined surface.
The bar code label attached to the bar code label is scanned with light, and the reflected light from the bar code label is received .
A partial bar corresponding to the scanned portion of the bar code label, including the portion scanned on the horizontal plane or the inclined surface of the bar.
A plurality of scanning units each outputting a code signal, including the partial barcode signal including the signal indicating the start code from the respective partial barcode signals output by the plurality of scanning units, and including the signal indicating the stop code The partial barcode signal is selected, and the selected partial barcode signal is a signal indicating the start code, a signal indicating the stop code is a tail, and a signal indicating the start code and the stop code are indicated by the signal indicating the stop code. A decoding unit that restores a barcode signal corresponding to the barcode label by superimposing the partial barcode signals so as to arrange the signal indicating the data code between the signal and the signal, and decodes the data indicated by the barcode label. A main unit having a unit and separately connected to the plurality of scanning units;
It is provided with.

Further, the scanning section of the bar code reading apparatus according to the present invention comprises a light source, a converging device for converging light from the light source at a predetermined distance, and the bar code label using light from the light source. And a light receiver that receives the reflected light from the barcode label and outputs the partial barcode signal.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of a bar code reader according to the present invention.

In the present embodiment shown in FIG. 1, the bar code label 4 is scanned with light, and reflected light from the bar code label 4 is received, and a partial bar code signal corresponding to the scanned portion of the bar code label 4 is output. (Here, for example, described as a scanning unit A1a, a scanning unit B1b, and a scanning unit C1c), and the partial bar which is separately connected to the plurality of scanning units and output by each of the plurality of scanning units. A main unit 2 having a decoding unit 3 for decoding the data indicated by the bar code label 4 in response to the code signal.

Each of the scanning sections A1a to C1c includes a light source (not shown), a converging device (not shown) for converging light from the light source at a predetermined distance, and a bar code using light from the light source. It comprises a scanner (not shown) that scans the label 4 and a light receiver (not shown) that receives reflected light from the barcode label 4 and outputs a partial barcode signal.

FIG. 1 shows a conveyor such as a belt conveyor 6 and a barcode label 4 conveyed by the conveyor and adhered in two states: a substantially horizontal A surface and a curved and inclined B surface. The illustrated luggage 5 is shown together with the present embodiment.

Next, the operation of the bar code reader according to the present embodiment will be described with reference to FIG. FIG. 2 is a diagram illustrating one method of restoring a bar code signal, and includes a scanning unit B1.
b is the A of the bar code label 4 affixed on the baggage 5 composed of, for example, a start code (ST), a plurality of data codes (D1 to D4) and a stop code (SP).
A partial bar code signal A including a signal indicating a start code, which is output by scanning (A scanning) the surface, and a scanning unit C1c
Partial bar code signal B including a signal indicating a stop code output by scanning (B scanning) the B side of the bar code label 4
The decoding unit 3 selects the partial barcode signal, and sets the signal indicating the start code at the head, the signal indicating the stop code at the tail, and the signal indicating the start code and the signal indicating the stop code. A partial barcode signal A and a partial barcode signal B are superimposed and combined so as to complement a datacode missing in each partial barcode signal by arranging a signal indicating a datacode and corresponding to the barcode label 4. This indicates that the barcode signal is restored.

In FIG. 1, a scanning unit B1b is installed above the center of a conveyor such as the belt conveyor 6 and horizontally with the conveying surface of the conveyor, and the scanning unit A1a is arranged above the left of the belt conveyor 6 above the conveyor. The scanner is installed at an appropriate angle (for example, 20 degrees to 45 degrees, preferably 30 degrees) in the center direction of the conveyor, and the scanning unit C1c is placed above the right side of the belt conveyor 6 in an appropriate direction toward the center of the conveyor. Angle (for example, 20 degrees to 45
Degrees, preferably 30 degrees).

Next, when the load 5 to which the barcode label 4 is attached is conveyed by the belt conveyor 6, the scanning section A1
Each of the scanning units a to C1c converges the light from the light source to a predetermined distance where the bar code label 4 should pass through the converging unit, and converges the converged light on, for example, the traveling of the belt conveyor 6. Scanning is performed by a scanner in a direction perpendicular to the direction, and reflected light reflected by the scanning is received by a light receiver.

At this time, the scanning section B1b scans the surface A of the barcode label 4 as shown in FIG. 2, receives the reflected light a of the scanned light, and receives a partial bar corresponding to a part of the barcode label 4. The code signal A is output. The scanning unit C1
2c, as shown in FIG. 2, scans the surface B of the bar code label 4, receives the reflected light b of the scanned light, and outputs a partial bar code signal B corresponding to a part of the bar code label 4.

The decoding section 3 receives the partial barcode signal A, the partial barcode signal B and the partial barcode signal from the scanning section A1a, and as shown in FIG. 2, a partial barcode signal including a signal indicating a start code. A and a partial barcode signal B including a signal indicating a stop code are selected, these selected partial barcode signals are combined, a barcode signal corresponding to the barcode label 4 is restored, and data indicated by the barcode label 4 is decoded. I do.

[0020]

As described above, according to the bar code reading apparatus of the present invention, the plurality of scanning units incline with the horizontal plane.
The bar code label attached on baggage is scanned by the light receiving the reflected light in a state with the stomach surface, bar code label
Output the partial barcode signal including the portion scanned on the horizontal or inclined surface of the bar , and the main unit superimposes and combines the partial barcode signals output by each of these multiple scanning units to produce a barcode label. The bar code signal corresponding to the bar code label is restored and the data indicated by the bar code label is decoded, so that the reflected light of the light scanned by the scanning unit does not return to the scanning unit, and the horizontal plane of the bar code label is used.
And bar code signal including the part scanned on the inclined surface
Use the barcode signal corresponding to the barcode label
Since it is restored, even if the bar code label is
Even if the attachment state is curved and inclined, the data indicated by the barcode label is not erroneously decoded or cannot be decoded.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a barcode reader according to the present invention.

FIG. 2 is a diagram illustrating one method of restoring a barcode signal.

FIG. 3 is a diagram showing a reading method by a conventional bar code reading device.

[Explanation of symbols]

 1a Scanning unit A 1b Scanning unit B 1c Scanning unit C 2 Main unit 3 Decoding unit 4 Barcode label 5 Luggage 6 Belt conveyor 31 Main unit 32 Scanning unit 33 Decoding unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-83681 (JP, A) JP-A-63-73488 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06K 7/10 G06K 7/015

Claims (4)

(57) [Claims] 1. A luggage having a horizontal surface and an inclined surface
The bar code label stuck on the upper side is scanned by light, and the reflected light from the bar code label is received .
A plurality of scanning units each outputting a partial barcode signal corresponding to a scanned portion of the barcode label, including a portion scanned on the horizontal surface or the inclined surface of a bell, and the plurality of scanning units. A bar code reading device, comprising: a main unit that decodes data indicated by the bar code label in response to the partial bar code signals respectively output by the plurality of scanning units that are separately connected. 2. The apparatus according to claim 1, wherein the main unit includes a decoding unit that combines the partial barcode signals output from the plurality of scanning units and decodes data indicated by the barcode label. 2. The barcode reader according to 1. 3. A system comprising a start code, a plurality of data codes and a stop code, having a horizontal surface and an inclined surface.
The bar code label attached to the luggage is scanned with light in a state where the light is reflected and the reflected light from the bar code label is received .
Scan the horizontal or inclined surface of the barcode label
In the scanned part of the bar code label including the part
Multiple corresponding bar code signals
A scanning unit , selecting the partial barcode signal including the signal indicating the start code and the partial barcode signal including the signal indicating the stop code from the respective partial barcode signals output by the plurality of scanning units. The selected partial barcode signal is a signal indicating the start code at the head, and the signal indicating the stop code is at the end, and the data code is between the signal indicating the start code and the signal indicating the stop code. And a decoding unit for decoding the data indicated by the barcode label by restoring the barcode signal corresponding to the barcode label by superposing the partial barcode signals so as to arrange the signals indicating the plurality of scans. A bar code reader, comprising: a main body portion separately connected to the main body portion. 4. The scanning unit, comprising: a light source; a converging device that converges light from the light source at a predetermined distance; a scanner that scans the barcode label with light from the light source; The bar code reader according to claim 1, 2, or 3, further comprising: a light receiver that receives the reflected light from the bar code label and outputs the partial bar code signal.