JPH074549Y2 - Cable bear testing machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an electric wire / cable tester, which is an accelerated life tester when the electric wire / cable is inserted into a cable bear and repeatedly bent. Regarding

[Prior Art and its Problems] Electric wires and cables used for power supply or signal transmission to mobile machines and industrial robots are repeatedly bent and twisted due to their properties. The bending or twisting state changes to different colors depending on the usage of the cable.

That is, for example, when the operating part of a mobile machine or an industrial robot repeats a simple reciprocating motion, the cables connected to these mechanical robots are inserted into the cable bearer for protection and at one end of the stroke. It is connected and fixed to the power feeding end or the signal receiving / transmitting end, and is turned at the other end of the stroke to be connected to the connecting end of the machine or robot, and the bending is repeated together with the cable bear.

The cable used in this way has a sufficient bending resistance design by itself, and is subjected to a characteristic test before being shipped in order to guarantee its characteristic. It is preferable to perform this characteristic test as closely as possible to the usage state, but up to now, no test machine suitable for this test has been found.

Under the above circumstances, the inventors independently attempted to manufacture a testing machine in which an electric wire / cable was inserted into a cable bearer, one end thereof was fixed, and the other end was reciprocally moved in the longitudinal direction to bend the electric wire. . In this production, an excent disk, a crankshaft, etc. can be considered as means for reciprocating the moving side of the cable bear, but the mechanism becomes large and the installation space of the tester becomes large, which is not preferable.

In view of the above, the present invention is close to the actual use state of the cable,
It is an object of the present invention to provide a cable bearer bending tester that has a small machine installation space and small vibration during operation.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, according to the present invention, an endless chain is suspended between a drive side sprocket and a driven side sprocket on a frame, and along the endless chain, the entire length of the suspension is extended. With a guide
On the moving body provided in this guide so that it can move in the length direction,
A slider fixed to a part of the endless chain is movably connected over the entire length of the sprocket, one end of the cable bear is fixed to the moving body, and the other end is fixed to the frame. , And on the frame,
A gutter-shaped guide, which fits the entire length of the cable bear extending from the other end toward the bending point, is provided along the endless chain.

A wire breakage detection means is electrically connected to the electric wire / cable inserted through the cable bear, and a signal from the reciprocating motion detector of the moving body is transmitted through a contact which becomes non-conductive when the breakage is detected by the detection means. You can enter on the counter.

[Action]

In the test machine according to the present invention having such a structure, when the endless chain travels through the sprocket, the slider moves along with the traveling body along with the endless chain along with the travel, and the movement causes the movement. The body moves along the guide. When the moving body moves, one end of the cable bear fixed to the moving body also moves while the bending point is displaced accordingly. That is, as the endless chain travels, the cable bearer is bent.

At this time, the bending point of the cable bear is guided and moved by the gutter-shaped guide, and this state is similar to the actual use state,
Moreover, a uniform bending action is performed.

In addition, if the above-mentioned counter is attached, due to disconnection,
When the contact opens and the counter stops counting, the number of bends up to the break can be confirmed by checking the number of counters.

〔Example〕

As shown in FIGS. 1 and 2, a driving side sprocket 1 and a driven side sprocket 2 are provided on a frame F, and an endless chain 3 is stretched between the sprockets 1 and 2, and a motor M Thus, the endless chain 3 travels via the sprockets 1 and 2. A guide 4 is provided near the endless chain 3 and extends over the entire length. In the figure, 9 is a tension roller.

As shown in FIGS. 2 and 3, a movable body 5 is movably fitted into the guide 4 so that the chain 3 of the movable body 5 can be moved.
A sliding plate 6 is fixed to the side of the sprocket 1, 2 over the entire length of the diameter. Grooves 7 are formed in the sliding plate 6 over the entire length in the vertical direction, and a slider 8 fixed to a part of the chain 3 is fitted in the groove 7, and when the slider 8 moves with the chain 3. The slider 8 slides in the groove 7 while moving the moving body 5.
And reciprocate together with the chain 3. The slider 8 is composed of a bearing, a sliding roller, etc., and one link pin of the chain 3 may be extended and attached to that portion.

One end of the cable bear A is fixed to the moving body 5,
The other end is fixed to the frame F.

Therefore, when a cable is inserted through the cable bear A and the endless chain 3 is run, the moving body 5 reciprocates along the guide 4, and one end of the cable bear A displaces the bending point along with the reciprocating movement. While moving, the gutter-shaped guide 10 guides and moves. That is, as the endless chain 3 travels, the cable bearer A is bent and a bending test is performed.

In the embodiment, the two-endless chain 3 is used,
The bending test of the two cable bears A was performed at the same time. However, if the number of threads of the endless chain 3 can be appropriately selected and the moving body 5 and the like are attached thereto, the appropriate number of cable bears A can be obtained. The bending test can be performed.

Also, when testing multiple cable bearers A,
It is advisable to detect the number of reciprocations (bending) until the wire / cable inserted in the bare A is broken. The detection means is shown in FIG.

That is, this is the case of 12 electric wires and cables as the sample P, and both ends of the conductor of the sample P are connected to terminals M _{1 to} M ₁₂ (general term M), respectively. The leads of the terminal M are connected in parallel to the secondary outputs of the transformer T via SW ₁ to SW ₁₂ (general name SW) and relays R _{1 to} R ₁₂ (general name R), respectively.

The contacts Ra _{1 to} Ra ₁₂ (general name Ra) of the relay R are counters C _{1 to} C ₁₂
The signal from the proximity switch S, which serves as a signal input contact (generic name C) and detects the operation of the moving body 5, is countered respectively.
It is transmitted to C and each counter-C counts.

Therefore, when the conductor of the sample P is broken, the circuit to the relay R is opened, the contact Ra is opened, and the signal to the counter-C is not transmitted, so that the counter-C corresponding to the broken sample P is stopped. That is, the number of times of bending of each sample P until disconnection is individually counted.

The testing machine continues to be operated until all the samples P are broken, and when all the breaking occurs, the preset counter Cp works and the testing machine stops.

It should be noted that the disconnection of each sample P may activate its indicator lamp, warning bell, or the like. Further, this disconnection bending number detection circuit can be attached even when the number of samples P is one.

[Effect of device]

According to the present invention, by configuring as described above, the size of the tester can be reduced, the test condition can be the same as the actual use condition of the cable, and the vibration during operation of the tester can be reduced. Can be small.

Further, a signal from the reciprocating motion detector of the moving body is electrically connected to the electric wire / cable inserted through the cable bearer, and the disconnection detecting means is electrically disconnected when the disconnection is detected by the detecting means. You can easily check the number of bends when the wire or cable is broken by inputting to the counter.

[Brief description of drawings]

1 and 2 are a front view and a plan view of an embodiment of a cable bear tester according to the present invention, and FIGS. 3 and 4 are a plan view of a main part and a right side cut of the main part of FIG. FIG. 5 and FIG. 5 show a circuit for detecting the number of times of wire breakage bending attached to FIG. 1 ... Drive side sprocket, 2 ... Driven side sprocket, 3 ... Endless chain, 4 ... Guide, 5 ... Moving body, 6 ... Sliding plate, 8 ... Slider, A ... Cable Ah, F ... Frame. P …… Sample (electric wire / cable), R _{1 to} R ₁₂ , R …… Relay, Ra _{1 to} Ra ₁₂ , Ra …… Contact,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kihachi Ohnishi 2-3-1 Iwata-cho, Higashi-Osaka City, Osaka Prefecture Tatsuta Electric Wire Co., Ltd. (56) Reference JP-A-59-142437 (JP, A) 52-26276 (JP, A)

Claims (2)

[Scope of utility model registration request] 1. A tester for a cable bear in which a cable bear A having a cable inserted therein is bent and folded in the middle thereof to move the bending point of the cable bear A, which is a drive side sprocket on a frame F. 1 and a driven-side sprocket 2, an endless chain 3 is spanned, and a guide 4 is provided along the endless chain 3 along the span of the span, and the guide 4 is provided so as to be movable in the longitudinal direction. The slider 8 fixed to a part of the endless chain 3 is movably connected to the movable body 5 over the entire diameter of the sprockets 1 and 2, and one end of the cable bear A is connected to the movable body 5. A gutter-shaped guy that is fixed and has the other end fixed to the frame F, and on which the entire length of the cable bear A extending from the other end toward the bending point is fitted. Cable Bear tester made by providing a 10 along the endless chain 3. 2. An electric wire inserted in the cable bear A.
A disconnection detecting means is electrically connected to the cable, and a signal from the reciprocating motion detector S of the moving body 5 is input to the counter C via the contact point Ra1 ... The cable bear tester according to claim 1, wherein