JPH07146226A - Wire-bending testing machine - Google Patents

Abstract

PURPOSE:To provide a wire-bending testing machine which can accurately detect a disconnected state of the conductors of the wire. CONSTITUTION:One ends of a plurality of conductors 6d of wires 6a-6c are respectively connected to a plurality of anode terminals 13, and the other ends of the conductors 6d are connected one by one or at a time to a plurality or one cathode terminal 14 or anode terminal 13. Then, when a current is supplied from an anode of a power source 9 to a cathode of the power source 9 through the terminals 13, the conductors 6d, the anode terminal 14 and a tester 10 interposed between the terminals 13 and the power source 9 is checked, no continuity is detected by a tester 10 of the disconnected conductor 6d, and continuity is detected by a tester 10 of the not disconnected conductor 6d, and the disconnected state (number of the disconnected wires) of the conductors 6d can be detected by the respective testers 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire bending test device for repeatedly bending an electric wire to detect a broken state of a core wire.

[0002]

2. Description of the Related Art An electric device on a car body side and an electric device on a door side of an automobile are connected by a wire harness formed by bundling a plurality of electric wires, and the wire harness is repeatedly bent as the door is opened and closed. Therefore, a bending test is performed for the purpose of detecting the broken state of the core wire of each electric wire.

As shown in FIG. 4, in the bending tester, the wire harness 6 is passed through two panels 2 and 3 joined by hinges 1 and 1 via grommets 4 and 5,
It is a structure in which both panels 2 and 3 are repeatedly opened and closed by a hydraulic cylinder or the like.

Then, as shown in FIG. 5, the core wires 6d, ..., 6 of the electric wires 6a, 6b, 6c of the wire harness 6 described above.
One end of d is collectively connected to the anode terminal 7 and
The other end is also collectively connected to the cathode terminal 8 and the tester 10 provided between the anode terminal 7 and the power source 9 detects the conduction state, whereby the core wires 6d, ..., 6d are disconnected. Had been detected.

[0005]

However, as shown in FIG.
As shown in (A), if one of the plurality of core wires 6d, ..., 6d is not broken, or if all of them are broken (contact is incomplete), the tester 1
Since the disconnection is not detected at 0, the disconnection state cannot be accurately detected. Further, when the disconnection state is detected by fluoroscopy, if the disconnection portion is on the back side (incomplete disconnection state) as shown in FIG. 6B, the disconnection state cannot be accurately detected. . Therefore, the conventional disconnection detection has a problem that the core wires 6d, ..., 6d cannot be detected unless all the core wires 6d, ..., 6d are completely disconnected.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an electric wire bending test apparatus capable of accurately detecting a broken state of a core wire of an electric wire.

[0007]

In order to achieve the above object, the present invention detects an open state of each core wire by repeatedly bending an electric wire having a plurality of insulated core wires with a bending tester. A testing apparatus, wherein either one of a plurality of anode terminals or cathode terminals for connecting one end of each core wire of the electric wire to each other and one end of each core wire are connected together or collectively. The other terminal of the cathode terminal or the anode terminal to be connected with each other, and a tester that is interposed between each of the anode terminal or the cathode terminal and the power source, and that detects the continuity of each core wire. The present invention provides a characteristic electric wire bending test apparatus. For example, one end of each core wire of the electric wire is connected to the anode terminal one by one, and the other end of each core wire is connected to the cathode terminal one by one or collectively, and the above-mentioned each anode is used. A tester for detecting the continuity of each core wire is provided between the terminal and the power source. Note that one terminal connected to one end of each core wire may be a cathode terminal, and the other terminal connected one at a time or collectively may be an anode terminal.

[0008]

According to the present invention, for example, one end of each of a plurality of core wires of an electric wire is connected to each of a plurality of anode terminals, and each of the other ends of the core wire is connected to a plurality or one. Connect to the other end for each cathode one by one or collectively. After that, when the power switch is turned on, electricity passes in the order of the anode of the power supply → each anode terminal → each core wire → end for the cathode → cathode of the power supply, and if you check the tester interposed between each anode terminal and the power supply, the wire breaks. Continuity is not detected in the core wire tester that is running, and continuity is detected in the core wire tester that is not broken,
With each tester, it becomes possible to accurately detect the broken state (the number of broken wires) of the core wire.

[0009]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. It should be noted that parts having the same configurations and functions as those of the prior art shown in FIG.

In the present embodiment, an electric wire actually used for a wire harness, such as an automobile thin-walled low voltage electric wire (AVS), an automobile ultra-thin low-voltage electric wire (AVSS), and a bending resistant thin-walled low voltage electric wire (AVSF) for an automobile. , 6d, which have the same mechanical characteristics and are insulated from each other by providing an enamel layer or an oxide insulating film on the outer periphery of the core wires 6d, ..., 6d,
Use 6c.

As shown in FIG. 1, one ends of the core wires 6d, ..., 6d of the electric wires 6a, 6b, 6c dedicated to the above-mentioned test of the wire harness 6 set in a bending tester (see FIG. 4) are Although only the core wires 6d, ..., 6d (for example, 7) of the electric wire 6c are shown in the figure, a plurality of (for example, 7) anode terminals 1 of the disconnection detection checker 12 are shown.
Connect one to each of 3, ..., 13.

As shown in FIG. 2, each of the anode terminals 13 may have a pressure contact blade structure in which the core wire 6d is inserted into the slit 13a from above and locked. With this pressure contact blade structure, the work of connecting the core wire 6d can be performed easily and quickly.

Further, the other ends of the core wires 6d, ..., 6d of the electric wires 6a, 6b, 6c are connected to the cathode terminals 14 of the disconnection detection checker 12 one by one or collectively as in the case of the one end. Connecting.

The disconnection detection checker 12 is provided between the power source (battery) 9 and the respective anode terminals 13, ..., 13 to detect the continuity of the core wires 6d ,. , 10 are provided.

With the above structure, the electric wires 6a, 6b,
, 6d, one end of each core wire 6d, ...
3, ..., 13 are connected one by one, and each core wire 6 is connected.
The other end of d, ..., 6d is connected to the cathode terminal 14.

After that, when the power switch 15 is turned on,
Anode (+) of power supply 9 → each tester 10 → each anode terminal 13
→ Each core wire 6d → cathode terminal 14 → cathode (-) of the power source 9 passes electricity in this order.

When each of the testers 10 is checked, the tester 10 of the broken core wire 6d does not detect the conduction, and the tester 10 of the non-broken core wire 6d detects the conduction, so that the continuity is detected. Depending on the number of testers 10 (or no continuity detected), the core wire 6d
The disconnection state (number of disconnections) of can be accurately detected.

FIG. 3 is a graph showing the relationship between the number of breaks in the core wire 6d and the number of bends. When the number of core wires 6d is 7, the first breaks in the bend count a and 2 in the bend count b. It is shown that the 7th wire was broken at the number of flexing times g in the same manner as below. In this graph, for example, if the breakage of the core wire 6d is allowed up to the second and third lines, it can be determined that the durability is up to the number of times of opening and closing of the door corresponding to the bending number e of the fourth bending. In the prior art, since the disconnection state cannot be detected unless the core wire 6d is disconnected for the seventh wire (complete disconnection), the number of bends g for the seventh wire is g.
That is, they made an erroneous decision that they had durability up to the number of times the door was opened and closed.

[0019]

As is apparent from the above description, in the electric wire bending test apparatus of the present invention, each core wire of the electric wire is connected to the anode terminal or the cathode terminal one by one.
If you use a test-use electric wire, in which the wires are insulated and the mechanical characteristics are the same as those of general wire harnesses, a tester installed between each anode terminal or cathode terminal and the power supply. With the check, it becomes possible to accurately detect the broken state (the number of broken wires) of the core wire, and more accurate durability or reliability test becomes possible. In addition, it becomes possible to accurately comply with the standard that the number of core wire breaks is 2 to 3.
Further, unlike the conventional test, it is not necessary to use X-rays, and the work of stripping the coating of the electric wire with a cutter knife is not necessary, so that the safety is improved.

[Brief description of drawings]

FIG. 1 is an electrical equivalent circuit diagram of a test method according to the present invention.

FIG. 2 is a perspective view showing a relationship between an anode terminal and a core wire.

FIG. 3 is a graph showing the relationship between the number of core wire breakages and the number of bendings.

FIG. 4 is a perspective view of a bending tester.

FIG. 5 is an electrical equivalent diagram of a conventional test method.

6 (A) and 6 (B) are explanatory views of a broken state of a core wire, respectively.

[Explanation of symbols]

 6 wire harness 6a-6c electric wire 6d core wire 9 power supply 10 tester 12 disconnection detection checker 13 anode terminal 14 cathode terminal

Claims (1)

[Claims] 1. A test apparatus for detecting a broken state of each core wire by repeatedly bending an electric wire having a plurality of insulated core wires with a bending tester, wherein one end portion of each core wire is 1 Either one of a plurality of anode terminals or cathode terminals that are connected one by one, and either the cathode terminal or the anode terminal that connects the other end of each core wire one by one or collectively A bending tester for an electric wire, comprising: a tester that is provided between each of the anode terminals or the cathode terminals and a power source and that detects the continuity of each core wire.