JPH0718106B2 - Wire disconnection detection device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wire breakage detecting device for manufacturing a desired elongated body by supplying a linear body in a predetermined direction.

"Prior Art" When manufacturing power cables, communication cables, ropes, and other long bodies, for example, when manufacturing the above-mentioned cables through a cable twisting means, an intervening linear body is arranged along a cable core. Twist together.

In the generally used twisting means, as shown in FIG. 1, a linear body (cable core) 3 is drawn from a linear body winding body (drum) 2 mounted on a cradle 1 and the linear body 3 is drawn.
Is pulled from the front side disc 4 to the eye plate 5 and twisted together at the twisting portion 6. At this time, the support pin 7 of the rotatable disc 6 arranged between the front side disc 4 and the eye plate 5 is twisted. A separate winding body (cheese) 8 for a linear body is loaded, and the linear body (intervening) 9 pulled out from the winding body 8 is passed through the guide ring 10 and the eye plate 5, The linear body 9 is twisted together with each linear body (cable core) 3 at the twisting portion 6.

The guide ring 10 is attached to the disc 6 via the stay 11, so that the guide ring 10 rotates together with the disc 6.

In the above, when twisting a cable with a large diameter and a small number of cores, the number of drums 2 is about 3 to 4, but when twisting a cable with a small diameter and a large number of cores like a control cable, The number of winding bodies for supplying the core is about 18 to 30.

By the way, in the above-mentioned cable twisting, the linear body 9
It is essential to detect wire breaks in the
A disconnection detecting device shown in FIGS. 6 and 6 is provided.

In the apparatus shown in FIG. 5, a swing-type arm C supported by a fixed bearing A and a movable bearing B is arranged in the vicinity of a wound body (cheese) 8 for a linear body, and the arm C serves as a microswitch. In this device, the winding-side terminal of the broken wire 9 hits the arm C to turn off the microswitch S, and the wire breakage is detected.

The device shown in FIG. 6 has a photoelectric switch composed of a light-emitter D and a light-receiver E arranged so that a predetermined light beam crosses the vicinity of the eye plate 5. In such a device, the terminal where the linear body 9 is disconnected is Due to the centrifugal force, it jumps out from a predetermined position, blocks the light beam of the photoelectric switch, and detects disconnection.

[Problems to be Solved by the Invention] However, in the device shown in FIG. 5 described above, even if the linear body 9 is disconnected, the disconnection terminal often does not hit the arm C. There is also the inconvenience of not detecting the end when the supply of P is interrupted.

On the other hand, even in the device shown in FIG. 6, the disconnection terminal of the linear body 9 may not jump out in a predetermined direction or may be entangled with another linear body 9 and the light of the photoelectric switch may not be blocked.

Due to the above reasons, in the current disconnection detection device,
The detection probability is as low as about 30%. Therefore, even though the disconnection detection device is installed, it is unavoidable to focus on the monitoring by the worker.

Particularly, when the number of the linear bodies 9 exceeds 100, the disconnection monitoring and the terminal monitoring of the linear bodies 9 are overwhelmed, and the satisfactory work cannot be performed.

As another publicly known technology, Taisho 15 utility model application publication No. 2444
No. 0, No. 50-8240, No. 55-80400, etc. disclose elements that are mechanically displaced when a linear body is broken and the displacement of the elements. (Posture change)
Is combined with a detector for electrically detecting.

However, these known technologies also require a detecting device having a set of an element and a detector for each linear body, which increases the facility cost and mounts each detecting device on a disk or other rotating body. As a result, the weight of the rotating body becomes heavy, and since the number of linear objects exceeds 5, the configuration including each detection device becomes complicated, and it is not possible to deal with the case where the number of linear objects exceeds 100. However, there are still many problems to be solved in practical use.

In view of the above problems, the present invention aims to economically provide a highly reliable device capable of reliably detecting disconnection of a linear body.

[Means for Solving the Problems] In order to achieve the intended object, the present invention provides a method in which a plurality of linear body winding bodies supported via rotatable discs are arranged along the axis of the discs. In a device for detecting the disconnection of each linear body drawn out to a plurality of guide pins, a plurality of guide pins corresponding to the number of linear bodies, a ring-shaped support body serving as a common support shaft for these guide pins, and the postures of these guide pins are provided. A guide for detecting a change, and each guide pin has an insertion portion for inserting the linear body on the tip end side thereof, and an attachment portion on the base end side thereof. And that a ring-shaped support is attached to the disc, and that each of the guide pins arranged with a spacing distributed around the ring-shaped support is Ring-shaped support through the mounting part of It is rotatably attached to the holding body, and each linear body pulled out from each linear body winding body is pulled through the insertion portion of each guide pin and each linear body is tensioned by these linear bodies. Supporting the tip side of the body, and the detector for detecting the change in the attitude of the guide pin corresponds to the tip side of the guide pin that is rotationally displaced due to the disconnection of the linear body. It is characterized by being located nearby.

[Operation] In the case of the device of the present invention, the linear body that is pulled out in the predetermined direction and is in the tension state is passed through the insertion portion of the guide pin, and the posture of the guide pin in the insertion state is supported by the tension of the linear body.

When the linear body is broken in such a state, the tension state of the linear body is released, and the insertion portion side of the guide pin having the mounting portion as a fulcrum pivotally moves to the detector side due to its own weight or centrifugal force.

At this time, the detector catches the change in the posture of the guide pin and detects the disconnection of the linear body.

In addition, the winding body (drum, bobbin,
When the cheese or the like) becomes empty, that is, when the supply of the linear body is interrupted, the tension state of the linear body can be released, so that the situation can be detected as in the case described above.

Therefore, when the disconnection is detected in the device of the present invention,
Including the case of detecting the above two situations.

[Example] Hereinafter, an example of the device of the present invention will be described based on an example applied to the twisting device of Fig. 1.

In FIG. 1, a guide pin 21 made of a highly elastic linear material such as metal or plastic or a strip material has an insertion portion 22 for inserting a linear body at its tip end and a fulcrum at its base end. It has a mounting portion 23 for.

The insertion portion 22 has a spiral winding shape of a single winding or more, for example, a double winding spiral shape, and the mounting portion 23 has a clip shape bent into a hairpin shape.

The guide pin 21 having such a structure is used for the guide ring 10 of FIG.
It can be detachably attached to a predetermined part using.

That is, as clearly shown in FIGS. 2 to 4, an auxiliary ring 13 is attached to the guide ring 10 via a stay 12, and the auxiliary ring 13 has a fitting portion formed of a plurality of concave grooves at an appropriate pitch. 14 are formed, and the mounting portion 23 of the guide pin 21 is fitted into these fitting portions 14.

Thus, the guide pin 21 is detachably attached to the auxiliary ring 13 so that the guide pin 21 can be rotated around the attachment portion 23 side as a fulcrum.

The fitting portion 14 of the auxiliary ring 13 can be formed by cutting the peripheral surface of the auxiliary ring 13 with a mechanical processing means, or can also be formed by fitting a thrust receiving collar to the core material for the auxiliary ring. .

Further, the fitting portion 14 of the auxiliary ring 13 is preferably formed in consideration of the maximum number of windings for the linear body in the cable twisting device of FIG. 1, for example.

In the insertion portion 22 of the guide pin 21 described above, as described later,
The linear body 8 that is pulled out in a predetermined direction and exhibits a tension state is passed through, and the posture of the guide pin 21 in the inserted state is supported by the tension of the linear body 9. However, when the linear body 9 is disconnected, its own weight or centrifugal force is applied. As a result, a detector 31 for detecting the attitude change of the guide pin 21 is arranged at the position where the guide pin 21 pops out, that is, in the vicinity of the auxiliary ring 13 in FIG.

As the detector 31, for example, a touch sensor, a photoelectric switch, or the like is adopted.

As shown in FIG. 3, the detector 31 including a touch sensor has a sensor element 32 supported by an insulating block 33, and when the sensor element 32 is in contact with the guide pin 21 (a state indicated by a dotted line in the figure), an unillustrated ground circuit. Is provided so that disconnection can be detected.

In this case, a buffer portion 34 in the form of a coil spring is formed in the middle of the sensor element 32 in the longitudinal direction in order to absorb the impact when the guide pin comes into contact, and a wire connection portion is provided at the base end of the sensor element 32.
35 are formed.

As shown in FIG. 4, a detector 31 formed of a photoelectric switch is provided with a light transmitter 36 and a light receiver 37 corresponding to the protruding position of the guide pin 21 (state of the dotted line in the figure) at the time of disconnection. The light beam that passes through the container 37 is blocked by the guide pin 21, and the disconnection is detected.

In the above embodiment of the present invention, when the linear body (intervening) 9 is twisted together with the linear body (cable core) 3 as described above, the linear body 9 is passed through the insertion portion 22 of the guide pin 21, The tension of the linear body 9 causes the guide pin 21 to move to the third position.
It is supported in the state shown by the solid line in FIG.

After setting the guide pin 21 in this way, when the linear body 9 is normally pulled out, the guide pin 21 maintains the above-described solid line state, but when the linear body 9 is disconnected due to an unexpected situation, The tension of the linear body 9 is released, and the insertion portion 22 side of the guide pin 21 having the mounting portion 23 as a fulcrum is rotationally displaced to the state of the dotted line in FIG. 3 or the state of the dotted line in FIG. 4 by its own weight or centrifugal force. .

In FIG. 3, the guide pin 21 comes into contact with the sensor element 32 of the detector 31 to detect the posture change of the guide pin 21, and in FIG.
The light source between the light projector 36 and the light receiver 37 constituting the above can be cut off, and thus the disconnection of the linear body 9 can be detected.

In addition to the cable twisting device shown in FIG. 1, the device of the present invention can be applied to various devices as long as it is a wire breakage detection when supplying a linear body in a predetermined direction.

Further, in the twisting device shown in FIG. 1, the cable core can be used as a linear object to be detected and the disconnection thereof can be detected in the same manner as described above.

"Effects of the Invention" The wire breakage detection device according to the present invention has the following effects.

(1) In order to monitor a plurality of linear bodies with a single detector, the tip side of each guide pin is supported by using each linear body in a tensioned state, and the change in guide pin posture is detected. Since the detector for use corresponds to the tip side of the guide pin that is rotated and displaced due to the disconnection of the linear body, the posture of the guide pin when an unexpected disconnection or supply interruption occurs in these linear bodies The detector can be actuated by a change (rotation of the tip end side of the guide pin). Therefore, even with a plurality of linear bodies, a single detector can accurately detect such an unexpected situation. it can.

(2) The ring-shaped support attached to the disc
Since it serves as a common support shaft for each guide pin, many guide pins can be attached to the ring-shaped support,
Therefore, even if there are many linear objects to be monitored, it is possible to easily deal with them.

(3) Only the lightweight guide pink and the ring-shaped support are additionally equipped on the disc side. Therefore, the disc can rotate lightly because the weight of the disc is light and the configuration is complicated. Does not turn into

(4) Of the guide pins and the detectors required to monitor a plurality of linear bodies, the guide pin that requires a plurality is low in price, and even if the detector is high in price, only one is sufficient. Therefore, the equipment cost is not increased as a whole.

[Brief description of drawings]

FIG. 1 is an explanatory view when the device of the present invention is applied to a cable twisting device, FIG. 2 is a plan view showing a mounting state of guide pins in the device of the present invention, and FIGS. 3 and 4 are the guide pins. Explanatory diagrams illustrating various examples of detectors provided corresponding to
5 and 6 are explanatory views showing a conventional detecting device. 6 …… Disk 8 …… Linear body winding body 9 …… Linear body 10 …… Guide ring 13 …… Guide pin supporting auxiliary ring 21 …… Guide pin 22 …… Guide pin insertion part 23 …… Guide pin mounting part 31 …… Detector 32 …… Sensor element for detector 36 …… Sensor for detector 37 …… Receiver for detector

Claims (1)

[Claims] 1. An apparatus for detecting disconnection of each linear body drawn along a shaft center line of the plurality of linear body winding bodies supported via a rotatable disc, the linear body being linear. A plurality of guide pins corresponding to the number of bodies, a ring-shaped support body serving as a support shaft common to these guide pins, and a detector for detecting a posture change of these guide pins, and The guide pin has an insertion portion for inserting a linear body at the tip end side thereof and an attachment portion at the base end side thereof, and the ring-shaped support body is provided on the disc. Each of the guide pins, which are attached and are arranged with a spacing distributed around the ring-shaped support, is rotatably mounted on the ring-shaped support through these mounting portions. thing,
And that each linear body drawn out from each linear body winding body is pulled through the insertion portion of each guide pin to support the tip end side of each linear body by the tension of these linear bodies, and A line for detecting the change in the attitude of the guide pin, the detector being arranged near the ring-shaped support in correspondence with the tip end side of the guide pin which is rotationally displaced due to the disconnection of the linear body. Device for detecting wire breakage.