JPH10284208A - Inspection method for wire arrangement against connector of harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily inspect the right or wrong of wire arrangement against a connector not only in the case where the connectors are fitted to both ends of a wire bundle but also in the case where the connector is fitted to just one end. SOLUTION: In the inspection method for wire arrangement against the connector 3 of a harness 1 equipped with plural wires 2a to 2e coated by insulation material of different colors for respective kinds of wires and the connector 2 which binds the end portions of the wires in predetermined arrangement, the light of (n) kinds of wavelengths (where (n) satisfies a relation m<=2<n> when the number of the wires is (m)) irradiates the respective wires, and the right or wrong of the wire arrangement is inspected based on the reflection light amounts of the respective kinds of the light.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting the arrangement of electric wires with respect to a connector of a harness.

[0002]

2. Description of the Related Art In OA equipment such as computers, C
A main body including a PU and peripheral devices such as a printer and a display are connected by a large number of electric wires because of a large amount of information to be processed. In order to facilitate the insertion or removal of the wires, a unit called a harness is used in which the ends of the wires are bundled in a predetermined arrangement by a connector, and the connector can be connected simply by inserting the connector into the connector on the device side. ing.

The order of arrangement of the electric wires with respect to the connector of the harness is determined by design, and if the arrangement is incorrect, no signal is transmitted even if the connector is connected to the device. Therefore, in the final step of assembling the harness, the correctness of the electric wire arrangement is checked. In this inspection method, if connectors are attached to both ends of the wire bundle, the connectors at both ends are respectively connected to the connector portions of the inspection equipment, and it can be easily determined based on whether or not signals can be transmitted between the connectors.

[0004]

However, when the connector is attached to only one end of the wire bundle, the other end cannot be connected to the inspection equipment, so that the inspection cannot be performed by the above method. Therefore, the object of the present invention is not only when the connector is attached to both ends of the wire bundle,
It is an object of the present invention to provide a method which can easily inspect the correctness of the arrangement of electric wires with respect to a connector even when attached to only one end.

[0005]

In order to achieve the object, an inspection method according to the present invention comprises a method of connecting a plurality of electric wires coated with insulating materials of different colors according to the types of electric wires and an end of each of the electric wires. In a method of inspecting the arrangement of electric wires with respect to a connector of a harness including a connector arranged in a predetermined arrangement, when the number of types of electric wires is m, light of n wavelengths such that m ≦ 2 ⁿ It is characterized by irradiating the electric wire and inspecting the arrangement of the electric wire for correctness based on the amount of reflected light for each type of light.

[0006] There are various types of electric wires, such as signal lines and ground lines, and the insulating material to be coated is color-coded for each type.
Therefore, when light is applied to the insulating material, the amount of reflected light depends on the surface color of the insulating material. If a reference value for the amount of reflected light is determined in advance, two types of colors can be determined based on whether the measured amount of reflected light is higher or lower than the reference value. If light of n kinds of wavelengths is used, 2 ⁿ kinds of colors can be determined. Therefore, by selecting light of any n kinds of wavelengths that satisfies m ≦ 2 ⁿ and measuring the amount of reflected light for each kind of light when irradiating each wire with the light, the arrangement of the m kinds of wires is Correctness can be determined.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which the arrangement of the electric wires of the harness is inspected. Harness 1 is 5
It comprises a bundle 2 of electric wires and a connector 3 attached to one end of the bundle 2 of electric wires.

The inspection device comprises an inspection table 4 for fixing the connector 3, a first optical sensor 5, a second optical sensor 6, a sensor block 7 for fixing both sensors 5 and 6, and an inspection table for the sensor block 7. A driving source for reciprocating movement in parallel with 4, a comparator for comparing output signals of the sensors 5 and 6 with a reference value, and display means for displaying an output of the comparator. The reciprocating motion of the sensor block 7 is realized by transmitting the output of a motor as a drive source to the sensor block 7 via a crank mechanism. The drive source, the comparator, the display means, and the crank mechanism can be easily realized by appropriately combining known techniques, and are not illustrated. On the upper surface of the inspection table 4, a groove for arranging the ends of the electric wires is provided. The sensor block 7 reciprocates in the row direction (the direction of the arrow in the drawing). The first optical sensor 5 includes a pair of light emitting diodes and a phototransistor, and the second optical sensor 6 includes a light emitting diode and a phototransistor that emit light of different wavelengths from the light emitting diodes of the first optical sensor 5.

Now, the color of the insulating material covering the leftmost wire 2a in the drawing is green, the next wire 2b is yellow, the middle wire 2c is white, the second wire 2d from the right is gray, and the rightmost wire is 2d. Electric wire 2
Let e be ash. The electric wires 2d and 2e have the same properties and may be interchanged, so that they are all given the same gray color.

The light emitting diode of the first light sensor 5 emits, for example, red light. When the color of the object is yellow or white, the comparator is turned on, and when the object is green or gray, the comparator is turned off. Set a reference value. The light emitting diode of the second light sensor 6 emits blue light, for example, and the comparator is turned on when the color of the object is white or gray, and turned off when the color of the object is green or yellow. Set a value.

When the sensors 5 and 6 are energized in this way and the sensor block 7 is moved in the row direction of the electric wires, each sensor captures the color of each electric wire and outputs an ON or OFF signal.
In this example, only the combinations of the signals shown in Table 1 below are determined to be correct arrangements, and the others are rejected.

[0012]

As described above, the correctness of the arrangement of the four-color, five-core electric wires can be determined instantaneously.

In this embodiment, since two movable sensors having different wavelengths are moved in the row direction of the electric wires, two sensors are sufficient. However, a total of ten sensors of two types may be fixed and used above each electric wire. Instead of using two types of light emitting diodes, a color filter may be attached to the same type of light source, for example, white light, and the wavelength may be changed until the light beam reaches the electric wire.

[0014]

According to the present invention, the correctness of the arrangement of the electric wires with respect to the connector can be easily determined, thereby improving the efficiency of the harness quality inspection.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an inspection method according to an embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Harness 2 Wire bundle 3 Connector 4 Inspection table 5, 6 Optical sensor 7 Sensor block 2a, 2b, 2c, 2d, 2e Electric wire

Claims (1)

[Claims] 1. An inspection of the arrangement of electric wires with respect to a connector of a harness including a plurality of electric wires coated with insulating materials of different colors according to the types of electric wires, and a connector for bundling the ends of these electric wires in a predetermined arrangement. In the method, when the number of wire types is m, each wire is irradiated with light of n kinds of wavelengths such that m ≦ 2 ^n, and the wires are arranged based on the amount of reflected light for each light type. Checking for correctness.