JP5856001B2 - Compression sleeve for wire connection and compression positioning jig - Google Patents

Description

The present invention relates to a compression sleeve for wire connection and a compression positioning jig capable of performing reliable compression work in the indirect hot wire method and improving work efficiency.
About.

  FIG. 8 is a view showing an example of a conventional compression sleeve for connecting electric wires. As shown in this figure, an electric wire connecting compression sleeve (hereinafter also referred to as a compression sleeve) 30 is usually a conductive metal cylindrical body such as a copper alloy having electric wire insertion ports 31 and 32 at both ends. It is. Core wires C1 and C2 that are exposed by stripping the coatings on the ends of the wires W1 and W2 are inserted into the respective wire insertion openings in the opposite directions to the substantially center, and in this state, the outer periphery of the cylindrical body is inserted into a predetermined compression tool. The two inserted electric wires W1 and W2 are electrically connected by compression using (not shown).

  Such a compression sleeve is used for connection of a high voltage underline in, for example, a construction for suspending a pole transformer installed on a distribution pole. In this construction, after disconnecting the high-voltage underline connecting the high-voltage distribution line and the pole transformer between the high-voltage braces of the distribution pole at the edge line, the pole transformer is suspended. After carrying out, the charging-side pull-down line is inserted into the other end of the compression sleeve in which the power-down state pull-down line is compression-connected to one end side by indirect hot-line action, and the other end of the compression sleeve is compression-connected. Done.

JP 2005-188314 A Japanese Unexamined Patent Publication No. 2011-166983

  However, although the outer peripheral surface of the compression sleeve, which is a cylindrical body, is usually marked in the circumferential direction to indicate the compression position, the compression sleeve itself has a very small length of about 40 mm. In the indirect hot wire method, the compression sleeve must be compressed at a position about 2 m away from the hand by an insulating operation rod, and skill is required. In addition, since the outer peripheral surface of the compression sleeve is flat, the compression portion of the compression tool is likely to be displaced from the compression position of the compression sleeve, and for example, the position displaced from the normal compression position is compressed without noticing the displacement, or The same part may be compressed twice. Thus, when appropriate compression connection is not performed or when the number of compressions is not sufficient, the core wire may be dropped or the connection portion may be broken, and as a result, a power failure may occur.

  The present invention has been made to solve the above problems, and a compression sleeve capable of reliably compressing the compression position in the indirect hot wire method, and a compression positioning jig capable of reliably compressing the compression position of the existing compression sleeve The purpose is to provide.

The object is, according to one aspect of the present invention, on the outer peripheral surface of the conductive metal tubular body having the wire insertion openings at both ends in the length direction, there is an array of ridges or protrusions partitioned for each compression position. This is achieved by a compression sleeve for connecting electric wires, characterized in that it is detachably provided in the circumferential direction.

  The above-mentioned object is also substantially U that can be detachably attached to the outer peripheral surface of the compression sleeve for connecting electric wires made of a conductive metal cylindrical body having electric wire insertion openings at both ends in the lengthwise direction. By means of a compression positioning jig for a compression sleeve for wire connection, characterized in that it comprises a coupling body of a pinching member and a pinching member that is formed in a letter shape and is divided for each compression position and can form a protrusion in the circumferential direction Achieved.

  The compression sleeve of the present invention is provided with protrusions and the like that are divided for each compression position on the outer peripheral surface thereof, so that the operator can clearly recognize the compression position in the indirect hot wire method, so the operator confirms the compression position. The compression position can be reliably compressed, and the efficiency of the compression work can be improved. In addition, the compression positioning jig for a compression sleeve according to the present invention is detachably attached to the outer peripheral surface of an existing compression sleeve, so that the compression sleeve is provided with a ridge that is divided at each compression position as described above. Therefore, similarly to the compression sleeve, the operator can confirm the compression position and then reliably compress the compression position, thereby improving the efficiency of the compression work.

It is a figure which shows one Embodiment of the compression sleeve for electric wire connection of this invention. It is a figure which shows the modification of a protrusion shown in FIG. It is a perspective view which shows another embodiment of the compression sleeve for electric wire connection of this invention. It is a side view which shows another embodiment of the compression sleeve for electric wire connection of this invention. It is a side view which shows another embodiment of the compression sleeve for electric wire connection of this invention. It is a figure which shows an example of the compression positioning jig | tool of the compression sleeve for electric wire connection of this invention. It is a figure which shows the use condition of the positioning jig shown in FIG. It is a figure which shows an example of the compression sleeve for the conventional wire connection.

  Next, embodiments of the compression sleeve for wire connection and the positioning jig of the present invention will be described in detail with reference to FIGS. 1 to 6, but the present invention is not limited to the embodiments shown in the following enlarged views.

[Compression sleeve for wire connection]
1A and 1B show an embodiment of a compression sleeve for connecting electric wires according to the present invention. FIG. 1A is a front view and FIG. 1B is a side view. In the embodiment shown in this figure, the compression sleeve 1 comprises a cylindrical body 10 made of conductive metal having wire insertion ports 11 and 12 at both ends in the length direction. The openings toward the center from the wire insertion ports 11 and 12 at both ends are in communication with each other, and a protruding stopper 33 is provided on the inner peripheral surface of the center, so that the core wires of the wires are the same from both ends of the compression sleeve 1. It is configured to be inserted by the length. In the case of the compression sleeve 1 of the present embodiment, the circumferential direction is applied to each of the four compression positions so that the compression sleeve 1 is compressed at two places on the one-shaped electric wire inserted therein, and at four places in the total length thereof. Are engraved with marks 35, 35,. For convenience of explanation, the compression sleeves having four compression positions are also used in the embodiments shown in the following drawings.

  In the compression sleeve 1 shown in FIG. 1, the outer peripheral surface from the wire insertion opening 12 corresponding to the right half toward the center toward the center is divided into two compression positions indicated by engraved marks 35 and 35, respectively. Therefore, the ridges 14, 14, and 14 are provided between the two adjacent markings 35 and 35, and on both outer sides thereof, over the entire circumference in the circumferential direction. In addition, about the protrusion 14 nearest to the electric wire insertion port 12, it is also possible not to provide this.

  The cross-sectional shape of the protrusion 14 is not particularly limited, and can be appropriately selected from, for example, a substantially semicircular shape, a substantially elliptical shape, a substantially trapezoidal shape, and a substantially rectangular shape. The height of the protrusion 14 can be set to about 0.05 to 2 mm, preferably about 0.05 to 1 mm. Moreover, the width | variety will not be restrict | limited especially if it is a grade which does not have trouble in compressing the compression position in the outer peripheral surface of the compression sleeve 1 using the conventional compression tool, It can set suitably.

  The material of the ridge 14 may be the same as or different from that of the cylindrical body 10. In the latter case, it is possible to use various electrically nonconductive resins and rubbers. The protrusion 14 may be fixed to the outer peripheral surface of the cylindrical body 10 or detachably attached regardless of whether the material is the same or different.

  FIG. 2 shows a modification of the embodiment of the compression sleeve shown in FIG. 1, wherein (a) is a front view and (b) is a side view. The protrusion 15 in the present embodiment is the same as the protrusion 14 in the embodiment shown in FIG. 1 in that the cross-sectional shape, material, and fixing or detachable attachment are common, but the length is a circle of the compression sleeve. It is different from the protrusion 14 in that it is a part of the circumference. The configuration of the other cylindrical body 10 is not essentially different from that of the embodiment of FIG.

  In the case of the ridge 15 shown in FIG. 2, the length is set to about 2/3 of the circumferential direction of the compression sleeve 1, but the length is not limited to this, and may be shorter or longer (longest). Is the entire circumference and can be set). Further, the length of the protrusion 15 may be set as short as appropriate, and at least two in the circumferential direction may be intermittently arranged. As in the case of the embodiment of FIG. 1, the protrusion 15 closest to the wire insertion port 12 can be omitted.

  FIG. 3 is a perspective view showing another embodiment of the compression sleeve of the present invention. In the embodiment shown in this figure, the protrusions 14, 14, 14, 14, 14 extending along the entire circumference in the circumferential direction of the compression sleeve 1 shown in FIG. Are provided at substantially equal intervals, and are partitioned by protrusions 14 and 14 at each compression position (protrusions 14 and 14 are arranged at both ends so as to sandwich the compression position). In the present embodiment, a ridge 15 as shown in FIG. 2 can be used in place of the ridge 14 for partitioning at each compression position.

  FIG. 4 is a perspective view showing still another embodiment of the compression sleeve of the present invention. In the embodiment shown in this figure, both ends of the compression sleeve 1 are continuously expanded toward the outside in the length direction, and the flare-shaped expanded diameter portions 17 and 18 are formed. This embodiment is different from the embodiment, and the other structures such as the protrusion 14 and the cylindrical body 10 are essentially the same as those in FIG.

  FIG. 5 is a front view showing still another embodiment of the compression sleeve of the present invention. In the embodiment shown in this figure, instead of the ridges 14 or 15, the compression sleeve 1 is divided into two compression positions on the outer peripheral surface from the end of the wire insertion port 12 side to the center in the length direction. Further, an array of protrusions 16, 16,... Provided at regular intervals in the circumferential direction is provided. The array of the protrusions 16 may be directly fixed to the outer peripheral surface of the cylindrical body 10, and a strip-shaped tape having such an array of protrusions on the surface is prepared, and this is applied to the outer peripheral surface of the cylindrical body 10. It may be affixed. In the latter case, the tape can be peeled off if necessary.

  According to the compression sleeve of the embodiment shown in each of the above figures, the operator can confirm the compression position of the compression sleeve, and it is possible to reliably compress the compression position even by the indirect hot wire method, and the efficiency of the compression work Is achieved.

[Compression positioning jig for compression sleeve]
FIG. 6 is a perspective view showing an embodiment of a compression position setting jig for a compression sleeve according to the present invention. As shown in this figure, the compression positioning jig 2 of the embodiment includes sandwiching members 21 to 23, and cords 25 to 27 connected via connecting portions 21a to 23a provided on the outer peripheral surface thereof. Consists mainly of.

  The clamping members 21 to 23 have a substantially U-shape configured by an arc having an inner diameter substantially equal to the outer diameter of the compression sleeve to which the clamping members 21 are attached, and are attached as protrusions to the outer peripheral surface of the existing compression sleeve 30 (FIG. 7). reference). The cross-sectional shape and size of the arc portion in the direction orthogonal to this can be the same as that of the embodiment shown in FIG. Further, each arc portion is made of a material having elasticity that restores to its original form when both ends thereof are widened. As such a material, a conductive metal having elasticity or an electrically nonconductive resin can be used, but an electrically nonconductive resin is preferably used. Such a nonconductive resin is not particularly limited, and various conventionally known resins can be used.

  The connecting portions 21a to 23a are respectively provided on the outer surfaces substantially in the middle of the arcs of the clamping members 21 to 23. If these connection parts 21a-23a are fixed to the clamping members 21-23 and can connect these and the cord-like bodies 25-27, respectively, the shape and material will not be restrict | limited in particular.

  The cords 25 to 27 are not particularly limited as long as they are made of an electrical nonconductor, and various conventionally known ones such as strings and fishing lines can be used. Preferably, it has a tensile strength that does not cut when pulling the cord-like bodies 25 to 27 and removing the holding members 21 to 23 from the compression sleeve.

  In this embodiment shown in FIG. 6, a guide plate 28 is also provided. The guide plate 28 is an elongated plate-like body having a length substantially equal to or shorter than the entire length of the compression sleeve, and through-holes 28a and 28b penetrating in the thickness direction at end portions in the length direction. Is provided. The cords 25 and 27 are inserted into the through holes 28a and 28b, respectively. Moreover, the attachment part 29 is provided in the lower surface, and the guide plate 28 is hold | maintained in the position away from the clamping members 21-23 suitably by holding the cable-shaped body 26. FIG. The guide plate 28 having such a configuration mainly prevents the cord-like bodies 25 to 27 from being entangled with each other particularly in the vicinity of the sandwiching members 21 to 23, and applies a compression tool (not shown) along each of the cord-like bodies 25 to 27. Thus, the compression sleeve 30 is brought close to the compression position to reliably compress the compression position.

  FIG. 7 shows a usage state of the compression positioning jig of the embodiment shown in FIG. 6, (a) is a front view, and (b) is a side view on the wire insertion port 32 side. The compression positioning jig 2 is attached to the existing compression sleeve 30 in advance so as to partition the compression positions 35, 35, 35. Then, the core wire of the electric wire (not shown) is inserted from the electric wire insertion ports 31 and 32, and the compression positions defined on both outer sides of the holding members 21 and 23 and the holding members 21 and 22 and the holding members 22 and 23, respectively. The position compression operation is performed according to a conventionally known method. At this time, since the compression positioning jig 2 of the present embodiment can individually remove the individual clamping members 21 to 23 from the compression sleeve 30, if necessary, first remove the clamping member 21 or 23, and finally The clamping member 22 may be removed.

  The compression positioning jig 2 can be attached, for example, so as to have a protrusion arrangement as shown in FIG. Such attachment can be effectively used, for example, when a cut high-pressure underline is compression-connected using a compression sleeve. In this case, after inserting the high-voltage underline in a power failure state into one wire insertion port of the compression sleeve and compressing it in advance, the charged high-voltage underline on the distribution line side is inserted into the other wire insertion port by the indirect hot wire method. Then, it is necessary to compress, and by attaching the compression positioning jig 2 of the present embodiment to the compression sleeve 30, the compression operation at the compression position can be performed reliably.

  As described above, by attaching the compression positioning jig of the present invention to the existing compression sleeve, the operator can confirm the compression position of the compression sleeve, so that a reliable compression operation can be performed, and the efficiency of the compression operation is improved. Is achieved.

DESCRIPTION OF SYMBOLS 1 Compression sleeve for electric wire connection 2 Compression position setting jig | tool 10 Cylindrical body 11, 12 Electric wire insertion port 14, 15 Projection line 16 Protrusion 17, 18 Diameter expansion part 21-23 Nipping member 21a-23a Connection part 25-27 Cord shape Body 33 Stopper 35 Stamp (compression position)

Claims (4)

On the outer peripheral surface of the conductive metal cylindrical body having the wire insertion openings at both ends in the length direction, protrusions or an array of protrusions that are divided for each compression position are provided detachably in the circumferential direction. A compression sleeve for wire connection, characterized by The wire sleeve compression sleeve according to claim 1 , wherein the protrusions are arranged at regular intervals in a circumferential direction of the cylindrical body.   It can be attached to the outer peripheral surface of a compression sleeve for connecting electric wires made of a cylindrical body made of conductive metal having wire insertion ports at both ends in the length direction, and a protrusion that divides each compression position in the circumferential direction is formed A compression positioning jig for a compression sleeve for connecting electric wires, characterized by comprising a connecting body of a possible clamping member and a cord-like body. The compression positioning jig according to claim 3, wherein the connection body includes at least three pairs.

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