JPH0710277Y2 - Electric wire / cable bending / ironing tester - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bending / ironing tester for electric wires and cables.

[Conventional technology and its problems]

Electric wires and cables are used differently depending on the application. That is, the electric wires / cables laid on the utility poles or laid on the pipelines or trays are not bent, twisted, or ironed once they are laid or laid.

On the other hand, electric wires and cables used in industrial robots that have rapidly spread in recent years are subject to repeated bending, twisting, ironing, and the like. To be Therefore, the electric wires / cables for industrial robots are designed so as to sufficiently have the above-mentioned characteristics, and the manufactured electric wires / cables are tested whether they have the characteristics as designed.

An appropriate tester for confirming the above characteristics has not been announced so far, and the development of the tester has been awaited.

In view of the above, the present invention aims to provide a testing machine capable of bending and squeezing a large number of samples with one unit.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, in the present invention, a pair of upward swing arms swinging left and right about a vertical plane are provided at a required distance with their swing points on the same axis. On the sample support rod installed between both swing arms,
A plurality of sample holders are provided at appropriate intervals in the lengthwise direction, the electric wires / cables P are supported on the holders, and a weight is hung at the lower end of the holders. Means for preventing movement of the electric wire / cable P in the swinging direction are provided at required positions on both sides of the surface, and the movement preventing means contacts the electric wire / cable at a height excluding the swinging axis of the swing arm. It has been configured.

A shake and rotation prevention means may be attached to the weight.

Further, the wire breaker detecting means is electrically connected in series to the electric wires / cables supported by the respective sample holders, and the swing arm swing detector is connected through the contacts which become non-conductive when the wire breakage is detected by the respective detecting means. The signal from can be input to each counter.

The movement prevention means may be movable and fixed at an arbitrary position in the suspending direction of the electric wire / cable, and may be a roller or a rotatable columnar rod that rotates as the electric wire / cable moves.

[Action]

In the bending / ironing tester configured as above, when the swing arm is swung, the movement preventing means is not on the swing axis of the swing arm, and therefore the wire / cable is bent along with the vertical movement. That is, bending / ironing is performed. After oscillating the required number of times, check the characteristics such as continuity of each wire / cable.

At this time, if the above-mentioned counter is additionally provided, the contact is opened due to the disconnection and the counting of the counter is stopped, and the number of swings until the disconnection can be confirmed by checking the number of counters. This action is performed for each electric wire / cable.

If the weight is provided with a swinging / rotation preventing means,
Elimination of twisting and twisting of the weight due to the bending of the cable. This is effective when testing electric wires / cables with high rigidity and twisted core cables.

If the movement prevention means can be moved and fixed at any position in the hanging direction of the electric wire / cable, the degree of ironing can be changed, and if it is composed of a roller and a rotatable cylindrical rod, Vertical movement becomes smooth.

〔Example〕

Next, an embodiment of an electric wire / cable bending tester according to the present invention will be described with reference to the accompanying drawings.

In FIG. 1, the rotation of the geared motor 1 is transmitted to the rotating shaft of the eccentric disc 4 via the sprocket 2 and the chain 3. Eccentric disc 4
The eccentric movement of the pin 5 implanted in the
Is transmitted to the pin 6a of the sector gear 7 via.

By the motion transmitted to the pin 6a of the sector gear 7, the sector gear 7 rotates forward and backward at a constant rotation angle θ around the shaft 7a in FIG. Incidentally, here, the rotation angle θ is adjusted by changing the position of the pin 5 of the eccentric disc 4 by
The support member 5'is adjusted by adjusting the screw 5a 'and the elongated hole 5b'.

The sector gear 7 meshes with a gear 9 fixed to one of the rotating shafts 8 and 8'supported by a bearing 8a so as to face each other on the same axis line, and the rotating shaft 8 is rotated forward and backward.

The rotation of the rotary shaft 8 is performed by the gears a, b, the line shaft 12 supported by the bearing 11 to which the gear b is fixed, the gear C fixed at the other end of the line shaft 12, and the other rotary shaft 8 '. By the fixed gear d, it is transmitted to the other rotation shaft 8 ', and the two outward rotation shafts 8 and 8'rotate forward and backward simultaneously at the same rotation angle.

The swing arms 13, 13 fixed to the opposite ends of the two rotating shafts 8, 8'which face each other swing by the forward and reverse rotations of the rotating shafts 8, 8 ', and at the same time, between the swing arms 13, 13'. The erected sample support rod 14 also swings forward and backward. The sample support rod 14 is provided with holders 18 for the sample (electric wire / cable) P at required intervals in the length direction thereof.

Counter weights 15 are attached to the other ends of the two rotary shafts 8 and 8 ', respectively, to cancel the weights of the swing arm 13 and the support rod 14 and ensure smooth movement.

A pair of cylindrical rods 16 and 16 are rotatably disposed on both sides of the center axis of the swing range between the two opposed rotary shafts (swing shafts) 8 and 8'above the rotation axis. Cage, this cylindrical rod 16,
The sample (electric wire / cable) P is inserted between 16 and the bending position of the sample P is regulated. The cylindrical rod 16 is detachably supported by a bracket 17 so that it can be replaced with one having a different outer diameter according to the type and size of the sample P. A roller may be used instead of the cylindrical rod 16.

The sample P held and hung by the sample holder 18 is passed between the columnar rods 16 serving as bending position regulating means, and a weight 20 is hung from the lower end of the sample P via a hook 19.

The weight 20 to be suspended is provided with a steady stop and a twist stop. The steady rest is provided when the rigidity of the electric wire / cable which is the sample P is large, the contact point between the cylindrical rod 16 for controlling the bending position and the sample P serves as a fulcrum, and the lower end of the sample P shakes each time it bends. Therefore, this is to suppress this, and the reason for providing the twist stopper is to prevent the twisted core wire of the sample P from returning or twisting each time it is bent.

Various methods can be considered to prevent the weight 20 from swaying and twisting. 22 is inserted and attached to the frame F. Weight 4
It is not always necessary to provide a steady rest and a twist restraint.

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

Both ends of the conductor of the sample P attached to the tester are connected to terminals M _{1 to} M ₁₂ (general term M), respectively. Leads of terminal M go through SW ₁ to SW ₁₂ (generic SW) and then relays R _{1 to} R
₁₂ (generally R) and are connected in parallel to the secondary outputs of the transformer T, respectively.

The contacts Ra _{1 to} Ra ₁₂ (general name Ra) of the relay R are counters C _{1 to} C ₁₂
It serves as a signal input contact (generally C), transmits a signal from the proximity switch S for detecting the operation of the rotary shafts 8 and 8 ', to each count 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. Therefore, the counter C corresponding to the broken sample P is stopped. That is, bending of each sample P up to disconnection
The number of ironings is counted individually.

The tester continues to be operated until all the samples P are disconnected, and when all the samples P are disconnected, the preset counter Cp operates and the geared motor 1 or the tester is stopped.

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

Further, the cylindrical rod 16 can be provided below the rotation axis.

[Effect of device]

According to the bending / ironing tester of the present invention configured as described above, since a large number of samples can be provided on the swing arm, one tester can test a large number of samples.

As described in claim (2), when the weight is provided with the deflection / rotation preventing means, the accuracy of the bending / ironing test is improved.

As described in claim (3), a wire breakage detecting means is electrically connected in series to the electric wire / cable supported by each sample holder, and a contact which becomes non-conductive at the time of detecting the wire breakage of each detecting means, By inputting the signal from the swing detector of the swing arm to each counter, the number of times of bending of each sample at the time of disconnection can be easily confirmed.

According to claim (4), the ironing degree can be adjusted, and according to claim (5), the vertical movement of the electric wire / cable becomes smooth, and friction due to vertical movement is caused. The influence of force is eliminated and the test accuracy is improved.

[Brief description of drawings]

FIG. 1 is a schematic view of an embodiment of a wire / cable bending / ironing tester according to the present invention, FIG. 2 is a left side view of FIG. 1, and FIG. Fig. 4 is the first view
It is an electric circuit diagram of a figure. 13 …… Swing arm, 14 …… Sample support rod, 16 …… Cylinder rod, 18 …… Sample holder, 20 …… Weight, 22 …… Regulator, P
…… Sample (electric wire / cable), R _{1 to} R ₁₂ , R …… Relay, R
a _{1 to} Ra ₁₂ , Ra …… contact, C _{1 to} C ₁₂ , C …… counter.

 ─────────────────────────────────────────────────── ─── 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) References: 62-9153 (JP, U) Public Sho 62-49571 (JP, B2) Actual Sho 54-40857 (JP, Y2)

Claims (5)

[Scope of utility model registration request] 1. A pair of upward swing arms 13, which swing left and right around a vertical plane, are provided at a required distance with their swing points on the same axis.
A plurality of sample holders 18 are provided at appropriate intervals in the length direction on a sample support rod 14 installed between 13 and each of the sample holders 18 supports an electric wire / cable P and a weight 20 at each lower end thereof. Means for suspending the movement of the electric wire / cable P in the swinging direction at a required position on both sides of the vertical plane below the swinging top dead center of the sample holder 18 of each electric wire / cable P. Is provided
The movement preventing means 16 contacts the electric wire / cable P at a height excluding the swing axis of the swing arm 13, and is a bending / ironing tester for electric wire / cable. 2. A shake and rotation preventing means 22 is provided on each of the weights 20.
The electric wire / cable bending / ironing tester according to claim 1, further comprising: Wherein above each sample retainer 18 breakage detecting means supported wire and cable P to R _1, electrically series R ₂ ..., on the detection means R _1, R ₂ ... when the disconnection detection of _3. The signal from the swing detector S of the swing arm 13 is input to the counters C ₁ , C _2, ... Via the non-conductive contacts Ra ₁ , Ra _{2 ,} . Electric wire / cable bending / ironing tester. 4. The movement preventing means 16 is a wire / cable P.
The electric wire / cable bending / ironing tester according to claim 1, 2 or 3, wherein the device can be moved and fixed to any position in the hanging direction. 5. The movement preventing means 16 is a roller or a rotatable column cullet, and is adapted to rotate as the electric wire / cable P moves, according to any one of claims 1 to 4. Electric wire / cable bending / ironing tester.