JP4155557B2 - Terminal member for equipment direct connection terminal connection - Google Patents

Description

[0001]
[Technical field belonging to the invention]
The present invention relates to a terminal member used for a device direct connection type terminal connection portion for directly connecting a terminal of a power distribution cable to a power distribution device.
[0002]
[Prior art]
FIG. 8 shows a conventional screw-clamped general terminal member 1 used for a device direct connection type terminal connection portion, and FIG. 9 shows a device direct connection in which the terminal of the power distribution cable 2 is directly connected to the power distribution device using the terminal member 1. The shape termination connection part 3 is shown. This terminal member 1 has a T-shape having a cable-side insulating cylinder portion 4B into which an end of the power distribution cable 2 is inserted, a device-side device-side insulating cylinder portion 5 and an insulating cylinder portion 6 extending on the opposite side. It is an insulating material hollow body, and has a structure in which an inner semiconductive layer 8 is integrally molded inside an insulator 7 made of EP rubber (ethylene propylene rubber) or the like, and an outer semiconductive layer 9 is integrally molded outside.
[0003]
The procedure for directly connecting the power distribution cable 2 to the power distribution equipment as shown in FIG. 9 using the terminal member 1 will be briefly described. A cylindrical shape made of EP rubber or the like on the outer periphery of the insulator 15 at the terminal portion of the power distribution cable 2. After the spacer 14 is fitted, the compression terminal 11 is compression-connected to the exposed conductor 10, and this distribution cable terminal portion is inserted into the cable-side insulating cylinder portion 4 B of the terminal member 1. On the other hand, the device-side pin contact 12 is inserted into the device-side insulating cylinder 5 of the terminal member 1 to electrically connect the compression terminal 11 and the pin contact 12.
[0004]
The terminal member 1 using the spacer 14 is complicated because a spacer having a different inner diameter is required for each cable size (outer diameter size of the power distribution cable), and the cable-side insulating cylindrical portion 4B of the terminal member 1 is complicated. When inserting the terminal portion of the power distribution cable 2 inside, a large insertion force is required for friction, and the insertion operation is not easy.
[0005]
Accordingly, as shown in FIGS. 10 and 11, the cable-side insulating cylindrical portion 4 ′ B of the terminal member body 26 is made of a normal temperature shrinkable material (a rubber-like elastic material capable of expressing a sufficiently large shrinkage force). ) And a terminal member having a structure in which the cable-side insulating cylinder portion 4′B is kept in an expanded state and the removable inner core 27 is fitted inside the cable-side insulating cylinder portion 4′B. No. 31 was invented and a patent application was filed (see JP-A No. 2002-152963). In this conventional terminal member 31, the inner diameter of the cable-side insulating cylinder part 4′B is made smaller than the outer diameter of the inner core 27 over the entire length of the cable-side insulating cylinder part 4′B.
[0006]
[Problems to be solved by the invention]
The point of directly connecting the power distribution cable to the power distribution device using the terminal member 31 will be briefly described by using a part of the reference numerals in FIG. 9. The power distribution cable in which the compression terminal 11 is compression-connected to the exposed conductor 10. After the terminal portion is inserted into the inner core 27 in the cable-side insulating cylinder portion 4′B, if the inner core 27 is disassembled and removed by pulling out the drawn-out piece 27b of the inner core 27, the cable side whose diameter has been expanded The insulating cylinder portion 4′B shrinks and fits closely to the outer periphery of the insulator 15 of the power distribution cable 2.
Therefore, according to the terminal member 31, the spacer 14 is not necessary, and no force is required when inserting the distribution cable terminal portion into the cable-side insulating cylinder portion 4′B. Insertion work becomes extremely easy.
[0007]
However, since the inner diameter of the cable-side insulating cylinder portion 4′B (the inner diameter in a reduced state where the inner core 27 is not fitted) is smaller than the outer diameter of the inner core 27 to be inserted, the cable-side insulating cylinder portion 4 When the inner core 27 is fitted in 'B, the tip of the inner core 27 receives an excessive compressive force, and the inner core 27 may be bent or deformed. For this reason, there is a problem that the diameter expansion magnification of the cable-side insulating cylinder portion 4′B cannot be increased, and the applicable cable size range becomes narrow.
[0008]
The present invention has been made in view of the above circumstances, and can solve the problem that the inner core fitted in the cable-side insulating cylinder portion is buckled or deformed, and can widen the applicable cable size range. It aims at providing the terminal member for direct connection type termination connection parts.
[0009]
[Means for Solving the Problems]
The present invention that solves the above-mentioned problems is a terminal member main body having a cable-side insulating cylindrical portion into which a terminal portion of a distribution cable is inserted and a device-side insulating cylindrical portion through which a pin contact connected to a device or a pin contact connected to a device is passed. The cable-side insulating cylinder portion is made of a normal temperature shrinkable material, and an apparatus direct connection type end connection is made by inserting an inner core that keeps the cable-side insulating cylinder portion in an expanded state inside the cable-side insulating cylinder portion. In the terminal member for parts,
A small inner diameter portion having an inner diameter smaller than the outer diameter of the inner core is provided inside the cable side insulating cylinder portion on the opening side of the cylinder portion , and a large inner diameter portion having an inner diameter larger than the outer diameter of the inner core is provided in the cylinder. The inner core is fitted in the cable-side insulating cylinder so that the tip of the inner core is located at the large inner diameter portion and does not contact the inner surface of the large inner diameter portion .
[0010]
A second aspect of the present invention is characterized in that the terminal member main body according to the first aspect is an elbow shape in which the cable-side insulating cylinder portion and the device-side insulating cylinder portion are perpendicular to each other, or a straight shape that is linearly connected.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a terminal member 31A for an apparatus direct connection terminal connection portion according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing only a terminal member main body 36 in the terminal member 31A, and FIG. It is sectional drawing of 33 A of apparatus direct connection termination | terminus connection parts which connected the terminal of the power distribution cable 2 to the apparatus using FIG.
This terminal member 31A is a terminal member used for the equipment direct connection type terminal connection portion 33A for connecting the compression terminal 11 compressed and connected to the conductor 10 of the power distribution cable 2 and the pin contact 12 on the equipment 23 side inside the insulating material. Thus, the cable-side insulating cylinder portion 4A of the terminal member main body 36 having the cable-side insulating cylinder portion 4A into which the terminal portion of the power distribution cable 2 is inserted and the device-side insulating cylinder portion 5 through which the pin contact 12 passes is made to be a room temperature shrinkable material ( A rubber-like elastic material capable of expressing a sufficiently large contractile force), and an inner core 27 that can be removed while keeping the cable-side insulating cylinder portion 4A in an expanded state is fitted inside the cable-side insulating cylinder portion 4A. It is a combined structure.
The inner core 27 of the embodiment is a plastic cylindrical body in which a spiral notch 27a is formed on the outer periphery or the inner peripheral surface, and includes a drawn piece 27b that is obtained by tearing out the spiral notch 27a at the end.
[0012]
The terminal member main body 36 is a T-shaped insulating material hollow body having the cable side insulating cylindrical portion 4A, the device side insulating cylindrical portion 5 and the insulating cylindrical portion 6 extending on the opposite side. The inner semiconductive layer 8 is formed on the inner side, and the outer semiconductive layer 9 is integrally molded on the outer side. The cable-side insulating cylinder portion 4A of the terminal member main body 36 is made of a normal temperature shrinkable material as described above. As this normal temperature shrinkable material, for example, an EP rubber (ethylene propylene rubber) is adjusted with an additive from an EP rubber. A material with higher flexibility can be used. Usually, since the entire terminal member main body 36 (cable-side insulating cylinder portion 4A, insulating cylinder portions 5 and 6) is molded with the same material as in the embodiment, the entire terminal member main body 36 is actually as described above. It is good to comprise with a normal temperature shrinkable material. In FIG. 3, 16 is an external semiconductive layer of the power distribution cable 2, 17 is a shielding layer, 18 is a sheath, and 19 is an insulating tape. Reference numeral 22 denotes an insulating bushing made of epoxy or the like covering the pin contact 12, and 23 denotes a part of the device. Reference numeral 24 denotes an insulating plug for closing the inside of the insulating cylinder portion 6, and reference numeral 25 denotes a cap.
[0013]
In the present invention, a small inner diameter portion 36b having an inner diameter smaller than the outer diameter of the inner core 27 is provided inside the cable side insulating cylinder portion 4A of the terminal member main body 36 on the cylinder portion opening side . A large inner diameter portion 36a having an inner diameter larger than the outer diameter is provided on the inner side of the cylindrical portion , and the inner core 27 is positioned on the large inner diameter portion 36a so that the inner core 27 does not contact the inner surface of the large inner diameter portion. It is made to fit in 4A.
[0014]
In the terminal member 31A, the distal end portion of the inner core 27 is located at the large inner diameter portion 36a of the cable-side insulating cylinder portion 4A and is not in contact with the inner surface of the cable-side insulating cylinder portion 4A. The tip of the tube does not receive excessive compression force. If a compressive force is applied to the tip of the inner core 27 as in the conventional terminal member 31, the tip end of the inner core 27 is excessively compressed in the terminal member 31A of the present invention. Since no force is received, the inner core 27 is less likely to be bent or deformed.
Further, when the inner core 27 is inserted to expand the diameter of the cable-side insulating cylinder portion 4A, excessive stress is not generated on the cable-side insulating cylinder portion 4A side, so that smooth diameter expansion is possible.
[0015]
The procedure for directly connecting the power distribution cable 2 to the power distribution device using the terminal member 31A as shown in FIG. 3 will be briefly described. The procedure itself is the same as that of the conventional terminal member 31 shown in FIGS. First, the terminal portion of the distribution cable 2 is peeled off, and the compression terminal 11 is compression-connected to the exposed conductor 10, and the distribution cable terminal portion is connected to the inner core 27 in the cable side insulating cylinder portion 4A of the terminal member 31A. Insert into. In addition, as operation | movement of the insertion operation | movement, the cable side insulation cylinder part 4A side is normally covered on a distribution cable terminal part.
On the other hand, the device-side pin contact 12 is inserted into the device-side insulating cylinder 5, passed through the hole 11 a of the compression terminal 11, and tightened and fixed with a nut 13 to electrically connect the compression terminal 11 and the pin contact 12. To do.
After that, when the inner core 27 was pulled out and the cylindrical shape was disassembled and removed from the inner side, the inner diameter of the inner core 27 was increased as shown in FIG. 4 A of cable side insulation cylinder parts shrink | contract, and it closely_fit | fits to the outer periphery of the insulator 15 of the power distribution cable 2. FIG.
[0016]
4 and 5 show another embodiment of the present invention. The terminal member 31′A of this embodiment is a plug-in type terminal member, which is composed of a cable-side insulating cylinder portion 4′A and a device-side insulating cylinder portion 5 ′, and is integrally molded inside and outside the insulator 7 ′. It has an internal semiconductive layer 8 'and an external semiconductive layer 9'.
And like the above-mentioned embodiment, while comprising cable side insulation cylinder part 4'A of terminal member 31'A, or the whole terminal member main body 36 'with a normal temperature shrinkable material, cable side insulation cylinder part 4 In addition to the small inner diameter portion 36 ′ b having an inner diameter smaller than the outer diameter of the inner core 27, a large inner diameter portion 36 ′ a having an inner diameter larger than the outer diameter of the inner core 27 is provided inside “A”. Is fitted into the cable-side insulating cylinder portion 4′A so that the tip end portion is positioned at the large inner diameter portion 36′a. Thereby, it is possible to prevent the inner core 27 from being bent or deformed as described above.
[0017]
In addition, each above-mentioned embodiment is what is called an elbow type in which the cable side insulation cylinder part 4A (4'A) and the apparatus side insulation cylinder part 5 (5 ') of the terminal member main body 36 (36') make a substantially right angle. Although it is a terminal member, like terminal member 31 "A shown in FIG. 6, FIG. 7, cable side insulation cylinder part 4" A and apparatus side insulation cylinder part 5 "of terminal member main body 36" are straight. The present invention can also be applied to straight end members that are connected. It should be noted that parts common to the terminal members 31A and 31′A of the above-described embodiments are denoted by “(two dash)” and description thereof is omitted.
And like each above-mentioned embodiment, while comprising cable side insulation cylinder part 4 "A of terminal member 31" A, or the whole terminal member main part 36 "with a normal temperature shrinkable material, cable side insulation cylinder part 4 "A is provided with a small inner diameter portion 36" b having an inner diameter smaller than the outer diameter of the inner core 27 and a large inner diameter portion 36 "a having an inner diameter larger than the outer diameter of the inner core 27. 27 is fitted into the cable-side insulating cylindrical portion 4 "A so that the tip end portion is positioned at the large inner diameter portion 36" a. Thereby, it is possible to prevent the inner core 27 from being bent or deformed as described above.
[0018]
【The invention's effect】
According to the terminal member for an apparatus direct connection terminal connection portion of the present invention, a small inner diameter portion having an inner diameter smaller than the outer diameter of the inner core is provided inside the cable side insulating tube portion on the tube portion opening side. A large inner diameter part with an inner diameter larger than the outer diameter of the core is provided on the inner side of the cylinder part , and the inner core is placed inside the cable side insulating cylinder part so that the tip part is located on the large inner diameter part and does not contact the inner surface of the large inner diameter part. Since they are fitted, the following effects are obtained.
[ 1 ] The tip of the inner core inserted into the cable-side insulating cylinder does not contact the inner surface of the cable-side insulating cylinder, and the tip of the inner core does not receive excessive compressive force. The risk of buckling or deformation is reduced.
[ 2 ] When the inner core is inserted to expand the diameter of the cable-side insulating cylinder portion, excessive stress is not generated on the cable-side insulating cylinder portion side, so that smooth diameter expansion is possible.
[ 3 ] Since there is less risk of problems with buckling or deformation of the inner core, it is possible to increase the expansion ratio of the cable-side insulating cylinder compared to the conventional case, and to expand the range of applicable cable sizes. it can.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a terminal member for a device direct connection terminal connection according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing only a terminal member main body in the terminal member of FIG.
FIG. 3 is a cross-sectional view of a device direct connection terminal connection portion using the terminal member of FIG. 1;
FIG. 4 is a cross-sectional view of a terminal member for a device direct connection terminal connection according to another embodiment of the present invention.
5 is a cross-sectional view showing only a terminal member main body in the terminal member of FIG. 4. FIG.
FIG. 6 is a cross-sectional view of a terminal member for a device direct connection terminal connection according to still another embodiment of the present invention.
7 is a cross-sectional view showing only a terminal member main body in the terminal member of FIG. 6. FIG.
FIG. 8 is a cross-sectional view of a terminal member for a conventional device direct connection type terminal connection portion.
9 is a cross-sectional view of a device direct connection terminal connection portion using the terminal member of FIG.
FIG. 10 is a cross-sectional view of a conventional terminal member for a direct connection type terminal connecting portion in which the problem of the terminal member of FIG. 8 is improved.
11 is a cross-sectional view showing only a terminal member main body in the terminal member of FIG.
[Explanation of symbols]
2 Distribution cable 3A Equipment direct connection type terminal connection part 4A, 4'A, 4 "A Cable side insulation cylinder part 5, 5 ', 5" Equipment side insulation cylinder part 10 Conductor 11 (of distribution cable) Compression terminal 12 Pin contact 27 Inner core 27a Spiral notch 27b Drawer piece 31A, 31'A, 31 "A Terminal member 36, 36 ', 36" Terminal member body 36a, 36a', 36a "Large inner diameter portion 36b, 36b ', 36b" Small inner diameter portion

Claims (2)

The cable side insulation cylinder part of the terminal member main body having a cable side insulation cylinder part for inserting the terminal part of the power distribution cable and a device side insulation cylinder part through which the pin contact on the equipment side or the pin contact connected to the equipment is shrunk at room temperature In the terminal member for the equipment direct connection type terminal connection part, in which the inner core that keeps the cable-side insulating cylinder part in an expanded state is inserted into the cable-side insulating cylinder part.
A small inner diameter portion having an inner diameter smaller than the outer diameter of the inner core is provided inside the cable side insulating cylinder portion on the opening side of the cylinder portion , and a large inner diameter portion having an inner diameter larger than the outer diameter of the inner core is provided in the cylinder. parts provided on the rear side, the device directly shaped end, characterized in that the inner core is a tip portion is fitted to the cable side insulation tube portion so as not to contact with the large inner diameter portion the inner surface located at the large inner diameter portion Terminal member for connection part.   2. The apparatus direct connection type termination according to claim 1, wherein the terminal member main body has an elbow shape in which the cable side insulating tube portion and the device side insulating tube portion are at right angles to each other, or a straight shape connected linearly. Terminal member for connection part.

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