JPH053912B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention instantaneously inspects whether each core wire of a wire harness and the pin of an end connector are correctly connected, and displays an indication of a connection failure. In detail, it is possible to use connectors with the same number of pins on both ends, wire harnesses that use connectors with different numbers of pins, or randomly wired wire harnesses where the corresponding connections between the core wire and connector are different on both ends. Regarding wire harness inspection equipment that can inspect even

(Prior Art) Conventionally, the wire harness inspection device described in Patent Application No. 59-86394, for example, connects the connectors at both ends of the wire harness to be inspected, for example, the input side connector of one connector and the output side connector of the other connector. When using a connector, if one end of the core wire is connected to, for example, pin 1 of the input side connector, and the other end of the core wire is connected to, for example, pin 10 of the output side connector, it is determined that the wiring is incorrect even if the connection is correct. Furthermore, if the connector pins of the wire harness are connected by a crossover wire, it is determined that there is a short circuit between the connector pins, and if there is no connection with any pin of the connector, the wire harness It was determined that the core wire was disconnected or the core wire was incompletely connected to the connector pin. In other words, it was unsuitable as a wire harness inspection device with randomly wired wires.

(Problems to be Solved by the Invention) In the case of a randomly wired wire harness as described above, the conventional wire harness inspection device judges that even a good wire harness is defective. In the case of a wire harness in which the number of pins on each connector is different, or a wire harness in which the corresponding connection between the core wire and the connector is different at both ends, the inspection must be performed while checking against a separately prepared wiring chart, so it can be done in a short period of time. There was a problem that it was difficult to carry out inspections.

Therefore, in order to solve the above problems, the present invention provides a reference connection data storage circuit that instantaneously stores connection data between the connector and core wire of a model wire harness that serves as a reference for inspection, and stores the data in the reference connection data storage circuit. The technical problem to be solved is to instantly determine whether the wire harness is correct or incorrect by comparing the reference connection data obtained with the inspection data of the wire harness to be inspected, and to display abnormal locations.

(Means for solving the problem) The technical means for solving the above problem is to use a wire harness inspection device that inspects wire harnesses with connectors connected at the ends for disconnections, incorrect connections, short circuits, etc. The model wire a model wire harness connection search means for searching the connection state between each core wire of the harness and each pin of the end connector and storing the connection state as reference data; A wire harness connection to be inspected that searches for the connection state between each core wire of the wire harness to be inspected and each pin of the end connector when the end connector of the wire harness to be inspected is attached, and stores the connection status as inspection data. A search means compares the test data with the reference data, and if it is determined that the test data matches the reference data, a normal display is performed, while the test data matches the reference data. a determination display means for displaying an abnormality when it is determined that the inspection data does not match the reference data, and an end portion of the wire harness to be inspected when the determination display means determines that the inspection data does not match the reference data The present invention includes a connection failure pin display means for sequentially displaying information on each pin that does not match the reference data of the connector.

(Function) According to the wire harness inspection device having the above configuration, when the end connector of the model wire harness is attached to the connector on the device side, the model wire harness connection search means detects each core wire and the end connector of the model wire harness. The connection state with each pin is searched and the connection state is stored as reference data. After this reference data is stored, when the end connector of the wire harness to be inspected is attached to the device side connector, the wire harness to be inspected connection search means searches for each core wire of the wire harness to be inspected and each pin of the end connector. The connection state is searched and the connection state is stored as test data. When the reference data and test data are stored in this way, the judgment display means compares the test data with the reference data, and if it is determined that the test data matches the reference data, While normal is displayed, if it is determined that the test data does not match the reference data, abnormal is displayed. If an abnormality is displayed by the judgment display means,
The connection failure pin display means sequentially displays information on each pin that does not match the reference data of the end connector of the wire harness to be inspected.

Therefore, using the information on each pin displayed on the connection failure pin display means, it is possible to reliably correct disconnections, incorrect connections, short circuits, etc. for each pin of the end connector of the wire harness to be inspected.

(Embodiment) FIG. 1 shows an external view of an embodiment of the wire harness inspection device of the present invention, which is capable of inspecting even randomly wired wire harnesses, and FIG. 2 shows an electric circuit block diagram.

In FIG. 1, a wire harness inspection device 1
Model wire harness 2 is the standard for inspection.
A, and an illuminated power switch 7 which also serves as a power-on indicator, is equipped with an output connector 5 and an input connector 6 that are of the same type as the connectors 3 and 4 at both ends of the wire harness 2 to be inspected.
By turning it ON, power is supplied from AC 100V. When inspecting a wire harness with random wiring, first connect connectors 3 and 4 of the correctly connected model wire harness 2A to the output connector 5 and input connector 6, and then connect connector 3 of the core wire of the model wire harness 2A. The number of search pins is set using the digital switch 8 for setting the number of pins, that is, the number of inspections. After performing the above preparation operations, by pressing the start switch 9, a search for the connection status between each core wire of the model wire harness 2A and the connector pins at both ends will be started by the action described later, and the number of pins will be set. Reference connection data for all the search pin numbers set by the digital switch 8 are stored in a memory RAM to be described later. When the search for the number of pins set by the digital switch 8 is completed, the completion buzzer sounds, so disconnect the connectors 3 and 4 of the model wire harness 2A from the output connector 5 and the input connector 6. and 4 are connected to the output connector 5 and input connector 6, and the digital switch 8 for setting the number of pins is set to random wiring check mode [555]. After performing the above operations, by pressing the start switch 9, a search for the connection status of each core wire of the wire harness 2 to be inspected and the connector pins at both ends thereof is started by the action described later, and the connection state of the model wire Digital switch 8 for setting the number of pins set when searching the connection status of harness 2A
Inspection data for all search pin numbers are stored in a memory RAM to be described later. When the search is completed, the previously stored reference connection data of the model wire harness 2A and the later stored inspection data of the wire harness to be inspected are sequentially compared,
If all the data match, a single tone buzzer and the OK lamp 10 that indicates normality will light up. If there are different data, there will be a check between the core wire of the wire harness 2 to be inspected and the pin of the connector 3 or connector 4. It is determined that there is a defective part in the connection, the NG lamp 11 lights up with a two-sequence buzzer, and the pin number of the output side connector 3 with the defective connection of the wire harness 2 to be inspected is digitally displayed on the output side display 13. At the same time, the pin number of the corresponding input side connector 4 is digitally displayed on the input side display 14. If the NG lamp 11 lights up, there is a connection failure, so disconnect the connectors 3 and 4 of the wire harness 2 to be inspected from the output connector 5 and the input connector 6, and prepare for correction work.
After preparing for correction work, press step switch 12.
Each time the button is pressed, the pin number in a connection failure state is displayed on the output side display 13 and the input side display 14, so the connection failure locations in the wire harness 2 are sequentially corrected while looking at the displayed pin numbers.

Next, the electric circuit block diagram shown in FIG. 2 will be explained.

When the power switch 7 is turned on, AC 100V power is supplied, and the power supply circuit POW converts the AC 100V power into a DC stabilized voltage and supplies it to each circuit.
The microprocessor unit CPU receives, for example, a 1MHz clock signal from the clock circuit CK, searches for the connection status of the model wire harness 2A, stores reference connection data, and searches for the core wire of the wire harness 2 to be searched and the connectors at both ends. 3,4
a readout memory ROM that stores a series of inspection control programs for inspecting the connection status between and finding and storing connection failure points; and the reference connection data;
Control signals and address signals are exchanged with a write/read memory RAM that temporarily stores test data.

Furthermore, the microprocessor unit CPU communicates with the bidirectional peripheral interface adapter RIA to send and receive signals.

For example, when inputting a test signal from the input connector 6 through signal communication between the peripheral interface adapter PIA and the microprocessor unit CPU, the input side interface
Activate IN and convert peripheral interface adapter PIA to input function.
The test signal is input and stored in the memory PAM.

Also, peripheral interface adapter
For example, when outputting a lighting signal to the OK lamp 10 as a result of signal communication between the PIA and the microprocessor unit CPU, the peripheral interface adapter PIA is converted to an output function, and the output side interface OUT is It is activated and outputs the lighting signal to the OK lamp.

The input interface IN is connected to the digital switch 8 for setting the number of pins, the start switch 9 for starting a search for connection status, the step switch 12 for sequentially switching and displaying connection failure points, and the input connector 6 for outputting. The interface OUT has the output connector 5, OK lamp 10 for normal display, and NG lamp 1 for abnormal display.
1, the output side display 13, and the input side display 14 are connected.

Next, the operation of this embodiment will be explained.

After connecting the connector 3 at one end of the model wire harness 2A to the output connector 5 and the connector 4 at the other end to the input connector 6, turn on the power switch 7.
Turn on the pin number setting digital switch 8.
Then, the number of connector pins of the wire harness 2 to be inspected is set. After this operation, when the start switch 9 is pressed, the next action item is executed in order by the microprocessor unit CPU and processing.

When the start signal from the start switch 9 is input to the microprocessor unit CPU via the input interface IN and the peripheral interface adapter PIN,
The microprocessor unit CPU is
According to the inspection control program stored in POM,
Peripheral Interface Adapter PIA,
first, via the output interface OUT,
A pulsed test signal is output to, for example, the first pin of the output connector 5. Said output connector 5
As a result of scanning the input terminal of the input interface IN of the microprocessor unit CPU, the test signal output to the 1st pin of the microprocessor unit CPU is transmitted to the 1st pin of the connector 3 of the model wire harness 2A connected to the output connector 5 → the core wire → When input to the microprocessor unit CPU via the model wire harness 2A connector 4 pin 1 → input connector 6 pin 1 → input interface IN → peripheral interface adapter PIA, the model The core wires of wire harness 2A are connector 3 and connector 4.
It is determined that it is connected to the 1st pin of each, and it is stored in the memory RAM.

According to the next scan timing of the microprocessor unit CPU, the second scan of the output connector 5 is performed via the peripheral interface adapter PIA and the output interface OUT.
Outputs a test signal to the No. pin. The inspection signal is from the 2nd pin of the connector 3 → the core wire → the 2nd pin of the connector 4
When input to the microprocessor unit CPU via No. 1 pin → No. 2 pin of input connector 6 → Input interface IN → Peripheral interface adapter PIA, the core wires are It determines that it is connected to the number pin and stores it in memory RAM.

At the next scan timing of the microprocessor unit CPU, a test signal is output to pin 3 of the output connector 5, the test signal is input to the input interface IN via the same route, and the input end is confirmed by scanning. In this case, if the test signal is input to the input interface IN via pin 10 other than pin 3 of input connector 6, then pin 3 of output connector 5 and the input connector to which the test signal was input 6 and the 10th pin are stored in the memory RAM.

As a result of outputting the test signal to the 4th pin of the output connector 5 at the next scan timing, if the test signal is not input to any input terminal of the input interface IN, the 4th pin of the output connector 5 is stored in the memory RAM. let

Furthermore, depending on the following scan timing,
As a result of outputting the test signal to pin 5 of the output connector 5, if the test signal is input to multiple input terminals of the input interface IN, the memory
In the RAM, the 5th pin of the output connector 5 and the multiple pin numbers of the input connector 6, for example, 5th pin and 6th pin.
Memorize the number pin.

In this way, the test signals are sequentially output to each pin of the output connector 5, and it is confirmed by sequential scanning which input terminal of the input interface IN the test signals are input to. , model wire harness 2A
It is determined which pin of the connectors 3 and 4 each core wire is connected to, and the pin number of the output connector 5 and the pin number of the input connector in the connected state are stored in the memory RAM.

Due to this action, the OK lamp 10 is turned on when the storage of the reference connection data for all the pin numbers set by the pin number setting digital switch 8 is completed.

After the standard connection data for all pin numbers set with the pin number setting digital switch 8 has been stored and the OK lamp 10 lights up, disconnect connectors 3 and 4 of the model wire harness 2A from the output connector 5 and input connector 6. .

Next, after connecting the connector 3 at one end of the wire harness to be inspected 2 to the output connector 5 and the connector 4 at the other end to the input connector 6, set the pin number setting digital switch 8 to random wiring check mode, [555]. .

Next, the microprocessor unit CPU performs the following operations on the wire harness 2 to be inspected according to the inspection control program stored in the memory ROM.
Regarding the model wire harness 2A~
Perform the same process as above, and when all the pin numbers of the pin number setting switch 8 set when searching for the model wire harness 2A have been inspected, the standard connection data of the model wire harness 2A stored earlier and , the inspection data of the wire harness 2 to be inspected that was stored later is compared sequentially, and if all the core wires match, the OK lamp 10 that indicates normality is lit with a short buzzer, and if they are different, the inspection data of the wire harness 2 to be inspected is It is determined that there is a connection failure, and the NG lamp 11 is turned on along with a two-continuous buzzer.

A flow diagram summarizing the above operations is shown in FIG.

When correcting a defective connection in the inspected wire harness 2, after removing the wire harness 2 from the output connector 5 and input connector 6, each time the step switch 12 is pressed, The pin number and the pin number of the input connector 6 are displayed on the output side display 1 respectively.
3, and is displayed on the input side display 14,
The connection between the core wire of the wire harness 2 connected to this pin number and the pin of the connector 3 or 4 is sequentially corrected depending on the defect status while referring to the wiring table.

When connecting the next wire harness 2 to be tested to the output connector 5 and input connector 6 to start a connection test, press the start switch 9, and the memory RAM that stores the test data of the previous wire harness to be tested will be reset. This makes it possible to store the inspection data of the wire harness to be inspected this time. Note that the first memorized reference connection data for model wire harness 2A will be stored in the memory RAM unless power switch 7 is turned OFF or pin number setting digital switch 8 is set to a value other than random wiring check mode [555]. continue.

To start a connection inspection of a different type of random wiring wire harness, connect the model wire harness of that type to the connector of the wire harness inspection device, set the number of connector pins to be inspected using the digital switch 8, and start. By pressing switch 9, the memory RAM that stores the connection data between the previous model wire harness and the wire harness to be inspected is reset, and it becomes possible to store reference connection data for different types of model wire harnesses.

In this way, it is instantaneously determined whether the connections between each core wire of the randomly wired wire harness 2 and the pins of the connectors 3 and 4 are accurate, and if there are any poor connections, they are sequentially memorized. Since the connector pin number of the defective location can be displayed, the defective connection location can be easily corrected in a short time.

In addition, when inspecting a non-random wiring wire harness in which, for example, the No. 1 pin of the connector 3 of the wire harness 2 is connected to the No. 1 pin of the connector 4 via a core wire, use the standard connection data of the model wire harness. If the pin number setting digital switch 8 is set to the number of connector pins of the wire harness to be inspected without memorizing it in advance, the inspection data of the wire harness to be inspected can be memorized from the beginning and abnormal locations can be displayed. .

In the case of this embodiment, the wire harness 2 has connectors 3 and 4 at both ends, but when inspecting the connection state of the wire harness 21, which has the connector 3 at one end and the loose wire 20 at the other end, As shown in FIG. 3, each of the discrete wires 20 is equipped with a discrete wire probe 22 for confirming which pin of the connector 3 is connected, and the discrete wire probe 22 is connected to each of the discrete wires 20. By providing an indicator 23 that displays which pin of the connector 3 the loose wire is connected to when touched, the connection state between the core wire of the wire harness 21 and the pin of the connector 3 is easily checked. You can check. This verification program is also optionally stored in the memory ROM.

(Effects of the Invention) The present invention can be used in cases where the output connector and input connector have different numbers of pins in a wire harness having connectors at both ends, or when the connection state between the core wire of the wire harness and the connector is different between the output connector and the input connector. By quickly searching for connection failure points in random wiring wire harnesses and displaying only the memorized information on the failure points at any time, inspection time can be shortened, and wire harness This has the effect of making it easier to correct defective parts.

[Brief explanation of the drawing]

FIG. 1 is an external view of one embodiment of the present invention, FIG. 2 is an electric circuit block diagram thereof, FIG. 3 is an external view of another embodiment, and FIG. 4 is an operational flow diagram. 1... Wire harness inspection device, 2... Wire harness to be inspected, 2A... Model wire harness, 3, 4... Wire harness connector,
5... Output connector, 6... Input connector, 7...
...Power switch, 8...Pin number setting digital switch, 9...Start switch, 10...OK lamp, 11...NG lamp, 12...Step switch, 13...Output side display, 14...Input side Display unit, CPU...microprocessor unit,
RAM, ROM...Memory, IN...Input interface, OUT...Output interface,
PIA...peripheral interface adapter.

Claims (1)

[Scope of Claims] 1. A wire harness inspection device for inspecting disconnections, incorrect connections, short circuits, etc. of a wire harness with a connector connected to the end thereof, which includes an end connector and a connector of a model wire harness serving as a reference for inspection. a device-side connector to which the end connector of the inspection wire harness is attached, and a connection between each core wire of the model wire harness and each pin of the end connector with the end connector of the model wire harness attached to the device-side connector. a model wire harness connection retrieval unit that searches for a connection state and stores the connection state as reference data; and after the reference data is stored, the end connector of the wire harness to be inspected is attached to the device-side connector. a wire harness to be inspected connection search means for searching the connection state between each core wire of the wire harness to be inspected and each pin of the end connector, and storing the connection state as inspection data; By comparison, if it is determined that the test data matches the reference data, a normal display is displayed, while if it is determined that the test data does not match the reference data, an abnormal display is displayed. and a determination display means for displaying each pin of the end connector of the wire harness to be inspected that does not match the reference data when the determination display means determines that the inspection data does not match the reference data. A wire harness inspection device comprising a connection failure pin display means for sequentially displaying information on the wire harness.