JPH0641156Y2 - Electric wire / cable twist tester - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a torsion tester for electric wires and cables.

[Conventional technology and its problems]

Bending, twisting, ironing, etc. are repeatedly added to the electric wires / cables used in industrial robots or mobile machines that have rapidly spread in recent years, and the addition method is not a single addition but a composite method. Added. Therefore,
The electric wires and cables used in these industrial robots are designed to withstand such usage conditions, and in order to guarantee quality, it is necessary to carry out a test under the above usage conditions before shipping.

By the way, a tester that meets the conditions when a cable is used for such an industrial robot has not been published so far.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a tester capable of bending a cable with repeated twisting.

[Means for Solving the Problems]

In order to achieve the above object, in the present invention, a fixing tool for one end of an electric wire / cable is provided on a frame, and a fixing tool for the other end of the electric wire / cable is attached to a swing end of a swing arm that swings horizontally. Provided, the frame side fixture,
The swing arm can be moved and fixed on the center line of its swing range orthogonal to the swing axis, and the both fixtures are
It was a twist tester for electric wires / cables, in which the ends of electric wires / cables were fixed vertically downward.

A signal from the swing detector of the swing arm is electrically connected in series to the wire / cable supported by the above-mentioned fixtures, through a contact which becomes non-conducting when the wire break is detected by the wire detecting device. Can be entered in the counter.

[Action]

The wire / cable torsion tester configured in this way is
When both ends of the electric wire / cable are fixed and supported by both fixing tools and the swing arm is rocked, the rocking end of the wire / cable rocks with the frame side fixed end as a fulcrum as it swings. However, the wires and cables can be repeatedly twisted. After repeatedly twisting the wire a required number of times, check the characteristics such as continuity of each wire / cable.

At this time, if the frame-side fixed end is not on the swing axis of the swing arm, the electric wire / cable is twisted and bent as the swing arm swings. That is, a torsion test with bending is performed. If the frame-side fixed end is moved and fixed to an arbitrary position, the degree of twisting / bending changes.

Further, if the above-mentioned counter is additionally provided, the contact is opened and the counter stops counting due to disconnection, and the number of twists until disconnection can be confirmed by checking the number of counters.

〔Example〕

Next, an embodiment of a twisting tester for electric wires and cables according to the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a horizontal swing arm 1 is provided on the lower portion of the frame F, one end of which rises up from the circular groove 12 of the frame F to the upper surface thereof to form a swing end 2. A counterweight 3 is attached to the other end to cancel the weight of the swing end 2 and ensure smooth movement.

The swing arm 1 is swung by the geared motor 4. That is, the rotation of the geared motor 4 is transmitted to the eccentric disc 6 via the bevel gear 5, and the rotational force of the disc 6 is transmitted to the gear 8 via the connecting rod 7 to rotate the swing arm 1.
Here, since the distance (rotation radius) r ₈ from the connection point of the connectin rod 7 to the gear 8 to the rotation axis thereof is set longer than that r _{6 of} the eccentric disc 6, 1 of the eccentric disc 6 is set. Rotation is gear 8
Of the fixed angle θ, that is, the gear 8 reciprocally rotates by the angle θ and the swing arm 1 swings.

The pin 6a of the eccentric disc 6 has a support member 6'movable in the radial direction of the disc 6 with a dovetail groove structure, and the support member 6'is screwed into the screw 6a 'and the long hole 6b'.
By moving and fixing to any position via the pin 6a
Adjust the position of. On the other hand, the Connectin Crod 7 has 2
The rods 7b, 7b of the book can be adjusted in length with a dovetail groove structure and can be fixed at arbitrary positions by the bolt 7a. Therefore, the swing angle of the swing arm 1 is adjusted by adjusting the position of the pin 6a and the length of the connecting rod 7.

A slide plate 9 in the swing radius direction is fixed to the swing end 2 of each swing arm 1, and the groove of the slide plate 9 is fixed.
A chucking fixture 10 for one end of an electric wire / cable (sample) P is movably fitted to 9a and fixed at an arbitrary position by tightening a bolt 10a.

On the other hand, the other end of the electric wire / cable P is fixed to the upper surface of the frame F on the center line of the swing range of each swing arm 1 (on the center line of the circular groove 12 and orthogonal to the swing axis). The tool 11 is provided with a dovetail groove structure so that it can be moved to an arbitrary position and can be fixed similarly to the fixing tool 10. A plurality of both fixtures 10 and 11 may be provided on the slide plate 9 or the frame F at required intervals so that they can be adjusted with the fixing positions at both ends of the electric wire / cable P.

Now, when the sample (electric wire / cable) P is inverted U-shaped and chucked with both ends facing downward in both fixtures 10 and 11, and each swing arm 1 is swung, the swing end of the sample P is The sample P is subjected to a torsion test by swinging around the frame F side fixture as a fulcrum. At this time, the wire / cable P
If the frame side fixed end (fixture 11) is not on the swing axis of the swing arm 1, the electric wire / cable P is twisted and bent as the swing arm 1 swings. That is, a torsion test with bending is performed. If the frame side fixed end (fixing tool 11) is moved and fixed to an arbitrary position, the degree of twisting and bending changes.

Next, the torsion counting circuit of the embodiment will be described with reference to FIG.

Both ends of the conductor of the sample (electric wire / cable) P attached to the tester are connected to the terminals M, respectively. The lead of the terminal M is connected to the secondary output of the transformer T via the switch SW and the relay R.

The contact Ra of the relay R serves as a signal input contact of the counter C, transmits a signal from the proximity switch S that detects the operation of the rotary shaft of the swing arm 1 to the counter C, and the 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 the counter C is stopped.

It should be noted that when the sample P is broken, its indicator lamp, warning bell, etc. may be activated.

The test conditions can be variously changed by changing the positions of the fixtures 10 and 11 and the length of the sample P. At this time, it is preferable that the position of the counterweight 3 can also be adjusted.

Although the above-described embodiment is a tester for a single electric wire / cable P, a plurality of fixtures 11 at one end of the electric wire / cable P are provided on the frame F at required intervals, and corresponding fixtures 11 are provided. , A swing arm 1 which swings horizontally is provided respectively, and a fixture for the other end of the electric wire / cable P is provided on each swing end 2 thereof.
It is also possible to provide 10 and simultaneously swing the swing arm 1 at the same angle by the geared motor 4 so that the torsion test of a plurality of electric wires / cables P can be simultaneously performed.

At this time, the torsion counting circuit may be configured as shown in FIG. That is, both ends of the conductor of each sample P are connected to the terminals M _{1 to} M ₁₂ (general term M), respectively. The lead of terminal M goes through SW ₁ to SW ₁₂ (generally SW) and then relay R ₁
~ R ₁₂ (general name R) is connected to the secondary output of the transformer T, and contacts Ra _{1 to} Ra ₁₂ (general name Ra) of the relay R are signal input contacts of counters C _{1 to} C ₁₂ (general name C). Next to
The signal from the proximity switch S is transmitted to each counter C.

Therefore, when the conductor of the sample P is disconnected, the circuit to the relay R is opened, the contact Ra is opened, and the signal to the counter C is not transmitted, as in the above-described embodiment, so that the counter C corresponding to the disconnected sample P is disconnected. Will stop. That is, the number of twists of each sample P up to disconnection is individually counted.

The tester continues to be operated until all the samples P are broken, and when all the breaks occur, the preset counter Cp operates and the geared motor 4, that is, the tester is stopped.

[Effect of device]

According to the torsion tester of the present invention configured as described above, the sample is uniformly twisted by swinging the swing arm, and the bending test is added by moving and fixing the frame-side fixture to an arbitrary position. It is possible to obtain the result of uniform condition in each test, and the reliability of the test result is high.

Further, if the breakage of the electric wire / cable is electrically detected and the number of twists until the break is counted, the number of twists at the break of the electric / cable (sample) can be easily confirmed.

[Brief description of drawings]

FIG. 1 is a schematic front view of an embodiment of a wire / cable torsion tester according to the present invention, FIG. 2 is a plan view of FIG.
FIG. 4 is a plan view of an essential part of FIG. 1, FIG. 4 is a sectional view taken along line XX of FIG. 2, FIG. 5 is an electric circuit diagram of FIG. 1, and FIG. 6 is an electric circuit diagram of another embodiment. is there. 1 ... Swing arm, 2 ... Swing end, 9 ... Slide plate, 10,11 ... Fixing tool, 12 ... Circular groove, P ... Sample (electric wire / cable), R _{1 to} R ₁₂ , R …… Relay, Ra _{1 to} Ra ₁₂ , Ra …… contacts, C _{1 to} C ₁₂ , C …… Counter F …… Frame.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Kihachi Ohnishi 2-3-1 Iwata-cho, Higashi-Osaka City, Osaka Prefecture Tatsuta Electric Wire Co., Ltd. (56) Reference JP-A-57-34432 (JP, A)

Claims (2)

[Scope of utility model registration request] 1. A fixture 11 at one end of an electric wire / cable P is provided on a frame F, and a fixture 10 at the other end of the electric wire / cable P is attached to a swing end 2 of a swing arm 1 which swings horizontally.
Is provided so that the frame F-side fixture 11 can be moved and fixed on the center line of the swing range orthogonal to the swing axis of the swing arm 1, and both the fixtures 10 and 11 are electric wires / cables. An electric wire / cable torsion tester characterized in that the P end is fixed with the vertical direction downward. 2. A wire breakage detecting means R is electrically connected in series to an electric wire / cable P supported by the both fixtures 10 and 11, and a contact Ra which becomes non-conductive when the wire breakage is detected by the detecting means R. The signal from the swing detector S of the swing arm 1 is input to the counter C.
Twist tester for electric wires and cables described.