JPH0355795B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a relay checker for inspecting the quality of a relay unit.

(Prior art) Generally, factory equipment uses a large number of relay units of different types, and when maintaining or inspecting equipment, it is necessary to check whether all of these relay units are operating normally. Must be inspected for quality.

As a conventional relay checker for inspecting the quality of a relay unit, there is, for example, one described in Japanese Patent Publication No. 189073/1983. This will be explained with reference to FIG.

This relay checker 110 is the relay unit 1
00 terminals 101 to 106, and a connector 112 that is attached to the connector 121 of the battery 120. and,
A resistor 113 and a Zener diode 114 are connected in series between both terminals of the connector 112 to which the + and - sides of the battery 120 are connected, and this series circuit is connected in parallel with a resistor R and a backflow prevention diode _D1.
Connect the series circuit of Zener diode 114
The voltage between the terminals of the relay unit 100 is supplied to the relay coil 107 via the switch 115 from the terminals 101 and 102 of the relay unit 100 attached to the connector 111.

Furthermore, the terminal to which one side of the battery 120 of the connector 112 is attached and the terminal to which one terminal 103, 104 of the relay contacts 108, 109 of the relay unit 100 of the connector 111 is attached are connected via a backflow prevention diode _D1 . , and further connector 11
The terminal to which the positive side of the second battery 120 is attached is connected to the terminal to which the other terminals 105, 106 of the relay contacts 108, 109 of the relay unit 100 of the connector 111 are attached via lamps 116, 117.

With this relay checker 110, for example, a relay unit 1 having normally open relay contacts 108 and 109 is connected.
When inspecting the quality of 00, the connector 111
Attach the relay unit 100 to the
If the relay unit 100 is normal with the battery 120 attached to the switch 115, the relay coil 107 will not be supplied with power when the switch 115 is turned off, so the relay contacts 108 and 109 will be open and the lamps 116 and 117 will be turned off. When the switch 115 is turned on, the relay coil 107 is supplied with power, so the relay contact 10 is turned off.
8,109 are closed and the lamps 116,11
7 is lit. If the relay contacts 108 and 109 of the relay unit 100 are normally closed contacts, the operation will be reversed.

(Problem to be Solved by the Invention) The above relay checker supplies power to the relay contacts of the relay unit and displays the energized state with a lamp, so if the contact resistance value of the relay contact is outside the standard. However, even if the lamp lights up and the test result is normal, it may break down after a short period of use, making it impossible to perform an accurate test.

In addition, each contact of a relay unit is inspected using a single lamp, so as the number of contacts increases, the number of lamps increases, the relay checker itself becomes larger, and the relationship between the lamp and relay contacts becomes more complicated. Misjudgment is likely to occur.

Furthermore, since the number of terminals and the power supply voltage of the relay coil vary depending on the type of relay unit, only one type of relay unit can be tested.

(Means for Solving the Problems) In order to solve the above problems, the present invention connects each relay contact of a relay unit in series and measures the total resistance value of each relay contact.

(Function) By measuring the total resistance value of each relay contact of the relay unit, pass/fail is determined based on whether the contact resistance value of the relay contact is outside the standard.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

FIG. 1 is an external perspective view of a relay checker according to the present invention, and FIG. 2 is a circuit diagram of a main part of the relay checker shown in FIG. 1.

The relay checker 1 has a plurality of connectors of different types for mounting various relay units on the surface of the box 2, including vertically long connectors 4 to 6, a square connector 7, a horizontally long connector 8, and round connectors 9 to 1.
2, and a digital tester 13 that measures and displays the resistance value.
, the relay contact under test is a normally open contact (A contact),
A contact indicator lamp 14 and B contact indicator lamp 15 to indicate that the contact is a normally closed contact (B contact), a manual/automatic changeover switch 16 to switch between manual check and automatic check, and a manual push switch 17. , voltage changeover switches 20 to 24 for setting the voltage supplied to the relay coil of the relay unit, display lamps 25 to 29 for displaying the selected state of the set voltage, and fuses 30 and 31.

In the box 2 of the relay checker 1, there is a wiring circuit such as a connector 4, and a digital tester 13.
measurement circuit, voltage converter 32, and automatic circuit 33
It is equipped with

The connector 4 includes a relay unit 40 having four relay contacts 41 to 44 and a relay coil 45.
The normally closed contact (B contact), the normally open contact (A contact), and the movable contact (C contact) of the relay contact 41 are attached to each terminal number 1, 5, and 9, and the terminal number 2 , 6, and 10 are equipped with the B contact, A contact, and C contact of the relay contact 42.
The B contact, A contact, and C contact of the relay terminal 43 are attached to each terminal number 11, and the B contact, A contact, and C contact of the relay contact 44 are attached to each terminal numbered 4, 8, and 12. Relay coils 45 are attached to terminals numbered 13 and 14.

Then, connect the terminal number 9 of this connector 4 to one terminal of the digital tester 13, interconnect the terminal numbers 1, 5, and 10, and interconnect the terminal numbers 2, 6, and 11. and terminal number 3,
Terminals 7 and 12 are interconnected, and terminal numbers 4 and 8 are connected to each other.
By connecting these terminals to each other and to the other terminal of the digital tester 13, when the relay unit 40 is attached to the connector 4, each B contact or A contact of each relay contact 41 to 44 of the relay unit 40 is connected to the other terminal of the digital tester 13. They are connected in series and inserted between both terminals of the digital tester 13.

The voltage converter 32 converts the AC 100V supplied via the plug 34 to the voltage selected by the voltage changeover switches 20 to 24 by means of an internal AC/DC converter circuit and a voltage conversion circuit, e.g., AC 100V when the switch 20 is in the on state. AC200V when switch 21 is on, DC12V when switch 22 is on, DC24V when switch 23 is on, and DC24V when switch 24 is on.
The voltage is converted to DC48V, and when the manual push switch 17 is pressed down, it is output to the terminal numbers 13 and 14 of the connector 4, and the voltage is output to the relay unit 40.
At the same time, power is supplied to the relay coil 45, and any of the indicator lamps 25 to 29 corresponding to the switches 20 to 24 that are turned on is lit, and the A contact indicator lamp 14 and the B contact indicator lamp are turned on depending on whether or not power is being supplied. Controls the lighting of 15.

The automatic circuit 33 has a built-in timer that operates for a certain period of time from when the manual pushbutton switch 17 is pressed while the manual/automatic changeover switch 16 is set to automatic, and the voltage converter 32 is operated until the time is up. On the other hand, it instructs to output the above-mentioned voltage, and when the type-up occurs, instructs to prohibit the output of voltage.

Next, the function of this relay checker will be explained.

First, connect the power plug 34 of relay checker 1.
After inserting it into an AC100V socket, attach the relay unit 40 to the connector 4. Then, the manual/automatic changeover switch 16 is operated depending on whether the automatic inspection is a manual inspection or not. Further, one of the switches 20 to 24 is turned on to set the voltage according to the relay unit 40. For example, relay unit 40
If the operating voltage is AC200V, switch 21 is turned on. As a result, the AC200V indicator lamp 26 lights up, and the b contact indicator lamp 1
5 lights up.

At this time, the digital tester 13 measures and displays the total resistance value of the contact resistances of the B contacts of the relay contacts 41 to 44 of the relay unit 40.

Next, by pressing down the manual push switch 17, a voltage output instruction is given to the voltage converter 32, and the voltage converter 32 outputs the selected voltage of 200 VAC, and this voltage of 200 VAC is applied to the connector 4. Power is supplied to the relay coil 45 of the relay unit 40 through the relay unit 40, and each movable contact (C contact) of the relay contacts 41 to 44 switches to the A contact side, and the A contact indicator lamp 14 lights up.

At this time, the digital tester 13 measures and displays the total resistance value of the contact resistance values of the a contacts of the relay contacts 41 to 44 of the relay unit 40.

Therefore, the quality of the relay unit 40 can be determined by determining whether the total resistance value of the B contacts and the total resistance value of the A contacts described above are each within the reference resistance value.

Furthermore, when automatic inspection is selected, even if the manual push switch 17 is released, the output of the first relay unit 40 that has been given an output instruction from the automatic circuit 33 to the voltage converter 32 for a predetermined period of time as described above will be disabled. After the inspection, the next relay unit 40
By attaching it to the connector 4, power is first supplied to the relay coil 45 and the relay contacts 41 to 44 are connected to the connector 4.
is switched to the A contact, the total resistance value of the A contact is displayed on the digital tester 13, and the timer in the automatic circuit 33 is activated and the voltage converter 32 is activated when the time is up.
A voltage output prohibition instruction is given to the relay coil 45, the power supply to the relay coil 45 is cut off, and the relay contact 4
1 to 44 are switched to B contacts, and the total resistance value of the B contacts is displayed on the digital tester 13.

FIG. 3 is a circuit diagram showing details of the connections of the connectors 4 to 8 of the relay checker 1 shown in FIG. 1.

As mentioned above, the connector 4 has the relay unit 40, the connector 5 has the relay unit 50,
A relay unit 60 can be attached to the connector 6, a relay unit 70 can be attached to the connector 7, and a relay unit 80 can be attached to the connector 8.

As for the connector 4, each terminal is connected so that each relay contact is connected in series when the relay unit 40 is installed as described above, and similarly, the connectors 5, 6, 7, and 8 are connected to each other in the relay unit. 50, 60, 70, and 80 are connected in such a way that the relay contacts are connected in series, and the connectors 4 to 8 are connected in parallel to both ends of the digital tester 13.

Relay units 50, 60,
The method of testing 70 and 80 is the same as that for the relay unit 40 described above, and each relay unit is tested individually.

(Effects of the Invention) As explained above, according to the present invention, each terminal of a connector to which a relay unit is attached is connected to connect each relay contact of the relay unit in series, and each relay contact of the relay unit is connected in series. Since the total resistance value of the contact resistance is measured, it is possible to accurately judge whether the relay unit is good or bad. Many relay units can be inspected with one checker, and it is also smaller and easier to carry. .

[Brief explanation of drawings]

Fig. 1 is an external perspective view of a relay checker according to the present invention, Fig. 2 is a circuit diagram of a main part of the relay checker shown in Fig. 1, Fig. 3 is a detailed circuit diagram of the relay checker shown in Fig. 1, and Fig. 4 is a conventional circuit diagram. It is a circuit diagram of a relay checker. In the drawing, 1 is a relay checker, 4 to 12 are connectors, 13 is a digital tester, 16 is an automatic/automatic changeover switch, 17 is a manual pushbutton switch, 21 to 24 are voltage changeover switches, 32 is a voltage converter, and 40 , 50, 60, 70, and 80 are relay units, 41 to 44 are relay contacts, and 45 is a relay coil.

Claims (1)

[Claims] 1 Provide a connector to attach the relay unit,
A relay checker characterized in that a wire is connected between each terminal of the connector so as to connect each relay contact of the relay unit in series, and the total value of the contact resistance value of each relay contact of the relay unit is measured.