JPH06223216A - Bar code reader - Google Patents

Abstract

PURPOSE:To prevent the occurrence of an unreadable state when the fixing position of a bar code is deviated in the width direction by providing this bar code reader with a beam light oscillating device for reciprocating beam light in the width direction of the bar code. CONSTITUTION:When the rotary shaft 31 of a rotary actuator 3 is rotated, a connection board 5 is reciprocated twice the distance of an eccentric distance in the arrow S direction. The 2nd fixing frame 7 is oscillated around the hinge shaft 81 of a hinge 8 in the arrow T direction due to the reciprocation and a bar code reader 1 is oscillated in the arrow U direction and the X-axis direction due to the oscillation of the frame 7. Beam light H projected from the reader 1 due to the oscillation of the reader 1 in the X-axis direction is reciprocated in the X-axis direction, i.e., between an angle theta1 in the width W direction of a bar code. Since the beam light H successively scans width D between the right arrow P1-theta1 and the left arrow P2-theta2 around the arrow P2-theta2 the bar code 2 arranged on the width D can be read out.

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 for reading a bar code attached to a product on a production line or the like and using it for control and management of the production line.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing the operation of a conventional bar code reader. In FIG. 5, reference numeral 2 is a bar code, and bars having a length corresponding to the width W in the x-axis direction are sequentially arranged in the length L in the y-axis direction, depending on the thicknesses of these bars and their intervals. Necessary information is described by a combination of numbers and characters displayed in binary code. The barcode is attached to each product on the production line, for example. Reference numeral 1 is a bar code reader, which has an angle θ _{1 in the} y-axis direction.
The light beam H that reciprocates between the
Then, the barcode 2 is scanned in the length direction so as to cover the length L, for example, between the arrows P _{0 to} θ ₀ . Then, the information of the barcode 2 is read from this reflected light.

[0003]

In the above-mentioned bar code reader, if the bar code mounting position deviates in the width direction of the bar code and the light beam deviates from the width of the bar code, it becomes unreadable. For this reason, the width of the bar code is made as large as possible so that the light beam does not come off from the bar code even if there is a deviation in the mounting position. There is a limit because of the relationship with the installation location, and this may cause an accident such as unreadable and production line stoppage.

An object of the present invention is to prevent unreadableness that occurs when the mounting position of a bar code deviates in the width direction without increasing the bar code width.

[0005]

In order to achieve the above-mentioned object, the present invention provides a bar code reader which scans a bar code with a beam of light in its lengthwise direction and reads the bar code from its reflected light. A beam light oscillating device that reciprocates the light in the width direction of the bar code is provided. This beam light oscillating device converts the rotation of the rotary actuator into reciprocating motion, converts this reciprocating motion into oscillating motion about the hinge axis, and this oscillating motion causes the bar code reader to move in the width direction of the bar code. It should consist of a rocking mechanism.

[0006]

Since the bar code reader of the present invention is provided with the beam light oscillating device for reciprocating the beam light in the width direction of the bar code, the reciprocating width is sequentially scanned, and the reciprocation of the beam light is performed. If there is a barcode within the range of motion, it will be readable. This beam light oscillating device converts the rotation of the rotary actuator into reciprocating motion, converts this reciprocating motion into oscillating motion about the hinge axis, and this oscillating motion causes the bar code reader to move in the width direction of the bar code. Since the mechanism is made to swing, the beam light can be reciprocated in the width direction of the barcode by the swing. Since the number of scanning lines is usually extremely large, the reading operation is not hindered by sequentially scanning within this width.

[0007]

1 to 4 are bar code readers according to the present invention.
2 is a perspective view including a partial cross section, and FIG.
1 is a vertical cross-sectional view showing details of the portion A in FIG. 1, and FIG.
B sectional view, FIG. 4 is a transverse sectional view showing details of the C portion of FIG.
It The barcode reader of the present invention shown in FIGS. 1 to 4.
On the barcode reader 1 shown in FIG.
The beam light H of the radar 1 at an angle θ in the x direction.₂Reciprocating between
A beam light oscillating device 9 is provided. This bee
The light oscillation device 9 includes a rotary actuator 3 and a rotary actuator.
A first L-shaped holder that supports the actuator 3 at one end thereof.
Rotating the attached frame 6 and the rotary actuator 3 downward
It is fixed to the shaft 31 and the distance d is eccentric with respect to the rotating shaft 31.
Eccentric shaft 4 having a downward shaft 42 at
A bearing 51 fitted to the shaft 42 of the shaft 4 and this bearing 51
Connecting plate having lateral bearings 52 at a distance from
5 and a shaft 71 fitted to the bearing 52 of the connecting plate 5 are
Consisting of a second mounting frame 7 provided at one end,
The other end of the first mounting frame and the second mounting frame
The other end of 7 is a hinge that can swing around a horizontal shaft 81.
Connected to the second frame 7 by a barco
The reader 1 is attached. The connecting plate 5 is
The distance between the bearings 51 and 52 can be adjusted by the into 53.
Has become. The operation of this barcode reader is as follows.
is there. The rotary shaft 31 of the rotary actuator 3 rotates.
And the connecting plate 5 is doubled in the direction of arrow S
Reciprocates a distance of 2d. This reciprocating movement causes the second
The attached frame 7 has an arrow T centered on the hinge shaft 81 of the hinge 8.
Swing in the direction shown in. Swing of this second mounting frame
Causes the bar code reader 1 to move in the direction indicated by arrow U,
It swings in the x-axis direction. X-axis of this barcode reader 1
Light is emitted from the barcode reader 1 by swinging in the direction
The light beam H is in the x-axis direction, that is, the width W of the barcode 2.
Angle θ in the direction of₁Reciprocates between. Therefore, the light beam
H is arrow P₀~ Θ₀Centered on the right arrow P₁~ Θ₁
And the left arrow P₂~ Θ₂To scan sequentially between the widths D
Then, if there is a barcode 2 within this width D, it can be read.
It Therefore, if the barcode mounting position is displaced in the width direction,
It is possible to prevent unreadable data that may occur in some cases. In addition, in FIG.
The mounting position of barcode 2 is the arrow P₀~ Θ ₀Conventional shown by
It shows the case where it is installed at a position off the scanning line.
Even in such a case, for example, the arrow P₁~ Θ₁
It can be read by the scanning line indicated by. This barco
Arrow P₁~ Θ₁To P₂~ Θ₂Width D
The scanning line is read by one of the scanning lines between
Since the number of lines is usually extremely large, it hinders the reading operation.
There is no messing.

[0008]

Since the bar code reader of the present invention prevents unreadableness that occurs when the mounting position of the bar code deviates in the width direction, for example, line stop due to unreadableness in the production line is significantly reduced. . Further, the bar code attachment accuracy may be low, which is a great effect in improving the production efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view including a partial cross section showing an embodiment of a barcode reader of the present invention.

FIG. 2 is a vertical cross-sectional view showing details of part A in FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a cross-sectional view of section C in FIG.

FIG. 5 is a perspective view showing an example of a conventional barcode reader.

[Explanation of symbols]

 1 Bar Code Reader 2 Bar Code 3 Rotation Actuator 9 Beam Light Oscillator H Beam Light

Claims (2)

[Claims] 1. A bar code reader that scans a bar code with a beam of light in its length direction and reads the bar code from its reflected light to reciprocate the beam of light in the width direction of the bar code. A bar code reader characterized by being provided with a moving device. 2. The bar code reader according to claim 1, wherein the beam light oscillating device converts the rotation of the rotary actuator into reciprocating motion, and converts this reciprocating motion into oscillating motion about the hinge axis. A bar code reader comprising a mechanism for rocking the bar code reader in the width direction of the bar code.