JP2880259B2 - End position detection method of steel core aluminum stranded wire in aluminum compression sleeve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a steel inside an aluminum compression sleeve for detecting a terminal position of a steel core aluminum stranded wire compression-connected in an aluminum compression sleeve such as a compression jumper sleeve. The present invention relates to a method for detecting the terminal position of a core aluminum stranded wire.

[Prior Art] When an erection terminal of a steel core aluminum stranded wire is to be retained, an aluminum compression sleeve is compression-connected to the terminal of the steel core aluminum stranded wire, and the aluminum compression sleeve is retained.

In this case, if the steel core aluminum stranded wire is not sufficiently inserted into the aluminum compression sleeve and compressed, the contact resistance between the steel core aluminum stranded wire and the aluminum compression sleeve will increase. This leads to an accident that the stranded wire comes off the aluminum compression sleeve.

Conventionally, in order to prevent such an accident from occurring, the steel core of the aluminum core in the aluminum compression sleeve is magnetized by a permanent magnet from outside the aluminum compression sleeve, and then the magnetic detector is compressed by the aluminum compression sleeve. The terminal position of the steel core was detected by detecting the magnetism of the steel core while moving along the portion (Japanese Patent Publication No. 60-34790).

[Problems to be Solved by the Invention] However, such a detection method requires a step of magnetizing a steel core of a steel core aluminum stranded wire, and has a problem that it is troublesome. Further, there is a problem that a strong permanent magnet for magnetizing the steel core is required.

An object of the present invention is to provide a method for detecting a terminal of a steel core aluminum stranded wire in an aluminum compression sleeve, which can detect a terminal of a steel core more easily than before.

[Means for Solving the Problems] The means of the present invention for achieving the above object will be described. The present invention relates to a method for determining the terminal position of a steel core of a steel core aluminum stranded wire which is compression-connected in an aluminum compression sleeve. In the method for detecting the end position of a steel core aluminum stranded wire in an aluminum compression sleeve to be detected, a sensor having a bar magnet rotatably supported at the center of gravity is used, and the sensor is disposed outside the aluminum compression sleeve along its longitudinal direction. And detecting the terminal position of the steel core of the steel core aluminum stranded wire from the direction of the bar magnet.

[Operation] When a bar magnet rotatable at the position of the center of gravity is used as the sensor in this way, the bar magnet has a property of attracting to the magnetic material, so that the steel core of the steel core aluminum stranded wire and the bar magnet attract. Thus, the terminal position of the steel core can be detected from the direction of the bar magnet without magnetizing the steel core.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. The steel core aluminum stranded wire 1 has a structure in which an aluminum wire 3 is twisted around a steel core 2. One end of an aluminum compression sleeve 4 is compression-connected to the end of the steel core aluminum stranded wire 1. That is, an electric wire insertion hole 5 is provided at one end of the aluminum compression sleeve 4, and the end of the steel core aluminum stranded wire 1 is inserted into the electric wire insertion hole 5 and compression-connected. The compressed portion 4A of the aluminum compression sleeve 4 thus compressed is compressed, for example, in a hexagonal cross section. The other end of the aluminum compression sleeve 4 is retained by a retaining pin lamp 6.

As a sensor 7 for detecting the terminal position of the steel core 2 of the steel core aluminum stranded wire 1 in the aluminum compression sleeve 4, a bar magnet 9 having a length of, for example, about 5 cm is accommodated in a case 8 made of a transparent plastic or the like. The bar magnet 9 has a structure rotatably supported by a shaft 10 at the center of gravity.

The case 8 of the sensor 7 is brought into contact with the compression portion 4A of the aluminum compression sleeve 4 and moved in the longitudinal direction. If the steel core 2 exists in the compression part 4A at the position where the case 8 is in contact, one pole of the bar magnet 9 (the S pole closer to the steel core 2 in the figure) is attracted to the steel core 2 by magnetic force. Together, the bar magnet 9 is oriented substantially perpendicular to the compression section 4A, as in the position A. When the sensor 7 exists at the position B where the steel core 2 does not exist in the compression portion 4A, one pole (the S pole in the figure) of the bar magnet 9 attracts the closest part of the steel core 2 by magnetic force. Therefore, the bar magnet 9 faces the end of the steel core 2, that is, the end of the steel core aluminum stranded wire 1. Thus, by observing the direction of the bar magnet 9 as the sensor 7 moves, the terminal position of the steel core aluminum stranded wire 1 can be known.

When the detection operation is performed in the live state, the sensor 7 is attached to the tip of the insulating rod and moved.

2A and 2B show an example of a specific configuration example of the sensor 7. FIG. In the sensor 7 of this embodiment, a guide plate 11 made of aluminum or the like is attached to the bottom surface of the case 8, and a guide recess 12 is provided at an end of the guide plate 11 so as to fit into the compression portion 4 </ b> A of the aluminum compression sleeve 4. It has a structure.

Such a sensor 7 moves while the guide recess 12 of the guide plate 11 is in contact with the compression portion 4A of the aluminum compression sleeve 4.

By doing so, the sensor 7 can be moved while keeping the distance between the compression unit 4A and the sensor 7 constant, and the detection can be performed more accurately.

FIGS. 3A and 3B show another example of a specific configuration example of the sensor 7. In this embodiment, an example in which the case 8 is provided vertically on the guide plate 11 is shown. The case 8 is transparent on both sides, and the shaft 10 is oriented parallel to the guide plate 11.

With such a structure, the direction of the bar magnet 9 can be seen from the moving direction of the sensor 7, and the monitoring of the sensor 7 can be performed more easily than in FIGS. 2 (A) and 2 (B). Workability is improved.

[Effect of the Invention] As described above, in the method for detecting the end position of the steel core aluminum stranded wire in the aluminum compression sleeve according to the present invention, a rod magnet rotatable at the center of gravity is used as a sensor. The terminal position of the steel core can be detected by utilizing the property that the steel core and the bar magnet attract each other. Therefore, in the present invention, the operation of magnetizing the steel core is not required, and the terminal position of the steel core aluminum stranded wire can be detected more easily than in the related art.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a main part showing an embodiment of a detection method of the present invention, and FIGS. 2A and 2B are a front view and a side view showing an example of a specific configuration example of a sensor used in the present invention. 3 (A) and 3 (B) are a front view and a plan view showing another example of a specific configuration example of the sensor used in the present invention. 1 ... steel core aluminum stranded wire, 2 ... steel core, 3 ... aluminum wire,
4 ... Aluminum compression sleeve, 4A ... Compression part, 5 ... Electric wire insertion hole, 6 ... Retention clamp, 7 ... Sensor, 8 ... Case, 9 ... Bar magnet, 10 ... Shaft, 11 ... Guide plate, 12…
... Guide recess.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-60487 (JP, A) JP-A-54-128758 (JP, A) JP-A-54-156561 (JP, A) 10960 (JP, U) Japanese Utility Model 4-8958 (JP, U) Japanese Utility Model 4-7361 (JP, U) Japanese Utility Model 4-2909 (JP, U) (58) Fields surveyed (Int. ⁶ , DB name) H01R 4/20-4/22 H01R 4/62 H01R 43/00 H01R 43/048 H02G 1/02 303 H02G 1/02 321 H02G 7/02 301 G01B 7/04 101 G01N 27/72

Claims (1)

(57) [Claims] In a method for detecting a terminal position of a steel core aluminum stranded wire in an aluminum compression sleeve which detects a terminal position of a steel core of a steel core aluminum stranded wire compression-connected in an aluminum compression sleeve, the terminal can be freely rotated at a position of a center of gravity. Using a sensor having a bar magnet supported on the aluminum compression sleeve, the sensor is moved along the longitudinal direction outside the aluminum compression sleeve, and the end position of the steel core of the steel core aluminum stranded wire is determined from the direction of the bar magnet. A method for detecting the end position of a steel core aluminum stranded wire in an aluminum compression sleeve, characterized by detecting.