JPS6152951B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic electrical resistance testing device that tests the electrical continuity of a wire that has a terminal connected to one end and peels off the fatigue coating at the other end or has a terminal connected to it.

Conventionally, electrical continuity tests on wires with terminals connected or whose sheaths have been peeled have been carried out by a person touching both ends of the wire or the terminals with a probe such as a tester.

However, when trying to achieve this mechanically, there are problems such as the length of the wires being different, or the wire being flexible, making it impossible to determine the position of the terminal, making it difficult to position the tester's contact at the required location. was difficult. Therefore, for example, a machine that cuts electric wires to a predetermined length, peels off the sheathing, supplies it to a transfer jig, and connects the terminals in the next process can conduct a continuity test using an automatic machine as one of its quality inspections. In the past, the samples had to be removed manually. This resulted in drawbacks such as uneven quality and time consuming.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide an automatic electrical resistance testing device that mechanically tests continuity of electric wires connected to terminals.

The automatic electrical resistance testing device according to the present invention grasps the terminal at one end of the wire with a fixed testing claw, and can electrically detect conductors in the vicinity of the chuck of the wire transfer device, as well as conduct continuity testing. The terminal position is detected by grasping the wire with a movable inspection claw and moving it in a squeezing motion towards the terminal, and the movement is stopped in response to the detection signal. The device performs a continuity test by supplying electricity, and is characterized by being able to automatically test the continuity of the electric wire, which has an undefined length and size and is connected to a terminal.

Embodiments of the present invention will be described below based on the accompanying drawings. An embodiment of the present invention is shown in FIGS. 1 and 2, and this resistance measuring device is roughly divided into a movable jig 1, a fixed inspection claw device 2 electrically insulated from the main body, and a movable inspection claw device 2 that is electrically insulated from the main body. It is composed of a pawl device 3, a support block 4, and a drive device 5 for moving the support block 4 up and down.

The moving jig 1 clamps the electric wire 10 on the terminal attachment side and transfers it between each process at right angles to the longitudinal direction of the support block 4.

The fixed inspection claw device 2 includes fixed inspection claws 12A and 12B that clamp the terminal 11 of the electric wire 10, and an actuator 3 that opens and closes the fixed inspection claws. The fixed inspection claws 12A, 12B are electrically insulated from other mechanical elements with which they are in contact.

The movable inspection claw device 3 includes movable inspection claws 17A and 17B that are opened and closed by an actuator 16, these movable inspection claws 17A and 17B, a block 18 that supports the actuator 16, and a block 18 that is screwed together, and a guide bar 20. As a guide, refer to the block 1 above.
A lead screw 19 that moves the lead screw 8 laterally, and a motor 21 that rotates the lead screw 19 in both directions.
It is composed of. Movable inspection claw 17A, 1
7B is electrically insulated from the fixed inspection claws 12A and 12B, and is also completely electrically insulated from other machines with which it is in contact.

The support block 4 supports a lead screw 19, a guide bar 20, a motor 21 fixed inspection claw device 2, and the like. A drive device 5 for moving the support block 4 up and down uses an actuator 22 to move the support block 4 up and down using a guide bar 20 as a guide.

FIG. 2 is a block diagram showing the principle of continuity testing in an embodiment of the present invention. The drive circuit 25 includes an actuator 1 that opens and closes the fixed inspection claws 12A and 12B.
3, and is controlled by a controller 26. In addition, the drive circuit 27 is connected to the movable inspection claw 17.
This is a drive circuit for the actuator 16 that opens and closes A and 17B, and is controlled by the controller 26. The contact detection circuit 29 detects the core wire 30 of the electric wire 10. A current is supplied from a power source 31 to the fixed inspection claw 12A and the movable inspection claw 17A. The continuity resistance measuring circuit 32 is connected to the fixed inspection claw 12.
B. Continuity resistance is measured by the movable inspection claw 17B, the data is fed back to the controller 26, and the value is displayed on the display 33. The changeover switch circuit 34 turns on and off the current supply to the movable inspection claw 17A for continuity testing according to instructions from the controller 26.
Reference numeral 5 denotes a switching circuit which is turned on and off when the movable inspection claws 17A, 17B are in contact with the core wires, and is in an opposite relationship to the changeover switch circuit 34 due to the action of an inverter 36.

Next, the operation of the embodiment configured as described above will be explained. The electric wire 10 with a terminal attached to one end of the electric wire 10 and the other coating peeled off in the previous process is transferred to the transfer jig 1.
is clamped and transferred to this device. Next, the actuator 22 works, and the fixed inspection claws 12A, 12
B. Lower the support block 4 to a position where the movable inspection claws 17A and 17B can clamp the electric wire 10. The movement starting point of the movable inspection claws 17A and 17B is the first
As shown in the figure, it is located very close to the clamp position of the transfer jig 1. In this state, the fixed inspection claws 12A, 1
2B, the movable inspection claws 17A and 17B are closed by the actuators 13 and 16, respectively, and the terminal 1 and the electric wire 1 are closed.
Clamp 0.

Next, the controller 26 turns the changeover switch circuit 35 ON and the changeover switch circuit 34 OFF, putting the contact detection circuit 29 in a standby state, and rotates the motor 21 to move the inspection claw to the right in FIG. 1 using the lead screw 19. Move 17A and 17B. When the movable inspection claws 17A, 17B come into contact with the core wire 30 during movement, the contact detection circuit 29 operates and outputs a signal to the controller 26. As a result, the controller 26 stops the rotation of the motor 21, turns off the changeover switch 35, turns on the changeover switch 34, and applies voltage between the terminal 11 of the test piece and the core wire 30. As a result, the conduction resistance measuring circuit 32 operates to determine the conduction resistance value, feeds it back to the controller 26, displays the value on the display 33, and holds it until the next data is displayed.

When the continuity test is completed, the fixed test claws 12A, 12
B and the movable inspection claws 17A and 17B open, releasing the electric wire 10, the actuator 22 works to raise the support block 4, and the motor 21 rotates in the reverse direction, and the block 18 returns to its origin and waits for the next inspection. state.

In this example, one end of the wire to be tested for continuity was a terminal, and the other end was a core wire with the sheath removed.
Insert a spring device into the movable inspection claws 17A and 17B,
If the contact part between the claw and the terminal is tapered, continuity can be measured in the same way even when the other end is a terminal.
Moreover, instead of displaying the measured value, it is also possible to set a certain limit range for the resistance value and make a pass/fail determination.

The automatic electrical resistance testing device according to the present invention can automatically test work that was conventionally performed manually and by sampling, and has the effect of reducing work costs and saving labor.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an electrical resistance testing device according to the present invention, and FIG. 2 is a block diagram showing the testing principle. 11... Terminal, 12A, 12B... Fixed inspection claw, 17A, 17B... Movable inspection, 30... Core wire.

Claims (1)

[Claims] 1 A device that automatically tests the continuity of a wire with a terminal connected to one end and a part of the sheath removed from the other end, which is electrically insulated from the main body that grips the terminal attached to one end of the wire. a first gripping means that is electrically insulated from the main body and that moves along the longitudinal direction of the electric wire while gripping the electric wire;
and a drive means for driving at least one of the gripping means, and after gripping the electric wire terminal with the first gripping means, the second gripping means is moved in the longitudinal direction of the electric wire, and the second gripping means is moved in the longitudinal direction of the electric wire. When the position of the core wire is detected by the second gripping means, the second gripping means is stopped and the first gripping means is stopped.
An automatic electrical resistance testing device characterized in that the gripping means and the second gripping means are configured to be able to test the state of electrical continuity between a terminal of an electric wire and a terminal core wire.