JP5578554B2 - Adapter for power cable connection - Google Patents

Description

  The present invention relates to an adapter for connecting a power cable, and is particularly useful when applied to a mobile electrical device such as a mobile transformer and a power cable.

  When an electric power facility has an accident due to a natural disaster, etc., the electric power company etc. needs to carry out accident recovery work at an early stage to maintain a safe supply of electric power. Therefore, for example, when the transformer becomes unusable due to an accident, an emergency power supply is performed by connecting a power cable to the transformer for movement. Thus, when connecting electric equipment such as a mobile transformer and a power cable in the case of supplying power using a temporary power facility, a fixed terminal fixed by crimping or the like to the cable end portion of the conventional power cable is used. It was directly connected to the fixed terminal of the electrical equipment.

  More specifically, as shown in FIG. 6A, the power cable 01 is fixed by fixing a battledore fixing terminal 02 crimped to the terminal end of the power cable 01 to a copper bar 03 that is a terminal on the electric equipment side. Is connected to electrical equipment. Here, when connecting, a plurality of (four in the figure) bolt holes 02A of the fixed terminal 02 are aligned with the positions of the bolt holes 03A of the copper bar 03, and bolts (not shown) are passed through the both. The fixed terminal 02 is fixed to the copper bar 03 by fastening a nut to the bolt. At this time, the fixed terminal 02 needs to be fixed to the copper bar 03 in a state where the surface thereof is held parallel to the surface of the copper bar 03.

  However, the operation of holding the surface of the fixed terminal 02 fixed to and integrated with the power cable 01 in parallel with the surface of the copper bar 03 and bringing it into contact with the copper bar 03 is difficult and labor-intensive. Although the power cable 01 has a certain degree of flexibility, the surface of the fixed terminal 02 intersects the surface of the copper bar 03 as shown in FIG. 6B when FIG. In such an attitude, that is, when it is not parallel, it is necessary to rotate the fixed terminal 02 together with the power cable 01 around its axis to correct the parallel attitude, whereas the power cable 01 is heavy. This is because a large force is required even when twisting around the axis.

  On the other hand, a technique disclosed in Patent Literature 1 is known as a terminal connection portion of a power cable that does not have an axial angle limitation during installation. The technique disclosed in Patent Document 1 is a fixed terminal that fixes a conductor lead bar at a power cable terminal portion and a compression terminal that compresses and connects lead wires, and each connection portion of the fixed terminal and the compression terminal is connected to the power. The cable is configured to be perpendicular to the longitudinal direction of the cable (see [Claim 1] of Patent Document 1).

  However, in the technique disclosed in Patent Document 1, the conductor lead bar is formed in the axial direction of the power cable, and the conductor lead bar is fastened and fixed by a fixed terminal, so that a large force acts in the axial direction. In such a case, there is a possibility that the conductor lead bar may come off from the fixed terminal.

  Further, there is also disclosed a technique disclosed in Patent Document 2 as a terminal connection portion of a power cable that has no axial angle limitation at the time of attachment and can prevent the power cable from coming off in the axial direction. This consists of a fixed terminal body of a battledore shape and a similar adapter of a battledore shape, and the main part of the anti-disengagement type fastening terminal, and the round bar-shaped male part of the adapter is attached to the fixed terminal body. The connecting portion is formed by fitting a slit-shaped cylindrical female portion so as to be relatively rotatable about an axis (see paragraph [0010] of Patent Document 2).

  However, in Patent Document 1, a groove for preventing the male portion from being pulled out is provided, and a screw is screwed into the female portion from the radial direction in the groove so as to prevent the power cable from coming off in the axial direction. (See paragraph [0011] of Patent Document 2), there is a problem that the structure becomes complicated. Moreover, combined with the small contact area between the male part and the female part, the contact resistance between the two becomes large.

JP 2003-70142 A JP 2002-84646 A

  In view of the above-mentioned problems of the prior art, the present invention has no limitation on the angle in the axial direction at the time of mounting, and can effectively prevent the power cable from coming off in the axial direction, and has a simple structure and assembly. The purpose is to provide.

  A first aspect of the present invention is a power cable connection adapter for connecting a terminal fixed to a terminal portion of a power cable to a terminal of an electric device, and abuts against the terminal of the electric device. A device-side terminal body, comprising a bowl-shaped receiving portion formed integrally and continuously with the device-side terminal body in the axial direction of the power cable and partially formed with a notch extending in the axial direction. A device-side fixed terminal, a head formed wider than the notch, and a head housed in the receiving part, formed continuously with the head in the axial direction and formed narrower than the notch. And a neck portion projecting in the axial direction through the bottom portion of the receiving portion, and a cable-side terminal main body formed continuously with the neck portion in the axial direction and abutted on the terminal of the power cable. Cable side fixed terminal In adapter for power cable connection, characterized in that it comprises a.

  According to a second aspect of the present invention, in the adapter for connecting a power cable described in the first aspect, the power cable connection is characterized in that the opening of the receiving part that houses the head is closed with a lid member. The adapter is for

  According to a third aspect of the present invention, in the adapter for connecting a power cable described in the first aspect, flange portions are provided on both sides of the notch portion in the receiving portion with respect to the axial direction, and are fastened between the flange portions. An adapter for connecting a power cable, characterized in that a member is inserted and the head portion housed in the receiving portion is tightened by the receiving portion.

  According to a fourth aspect of the present invention, in the adapter for connecting a power cable according to any one of the first to third aspects, a bottom portion of the bowl-shaped receiving portion is formed with a curved surface, and the head The power cable connecting adapter is characterized in that a portion of the portion that contacts the bottom is a curved surface that conforms to the curved surface shape.

  According to the present invention, after the neck portion of the cable-side fixed terminal is pushed into the receiving portion via the cutout portion, the head portion is accommodated in the receiving portion by moving downward by its own weight. In other words, the device-side fixed terminal and the cable-side fixed terminal can be assembled with one touch.

  Here, since the head is formed narrower than the notch, the head does not jump out of the receiving part through the notch after the head is stored in the receiving part. Therefore, in this state, the cable side fixed terminal is supported by the device side fixed terminal so as to be rotatable around the axis of the power cable. Therefore, even if the surface of the terminal fixed to the terminal end of the power cable is not parallel to the surface of the terminal of the electric device, the cable side terminal main body is connected to the device side terminal main body fixed to the terminal of the electric device. It can be easily rotated by the required amount.

  As a result, even if the surface of the terminal fixed to the terminal end of the power cable is not parallel to the surface of the terminal of the electric device, the cable-side terminal body is rotated by a necessary amount with respect to the device-side terminal body. Thus, the terminal on the power cable side can be easily fixed to the cable side terminal body.

  After connecting the power cable to the terminal of the electrical device through the adapter, the weight of the power cable acts on the receiving part of the fixed terminal on the device side through the head of the fixed terminal on the cable side. The As a result, the contact resistance of both contact portions can be reduced as much as possible.

It is a figure which shows the adapter for electric power cable connection which concerns on the 1st Embodiment of this invention, (a) is a front view which shows an apparatus side fixed terminal, (b) is a front view which shows a cable side fixed terminal. It is a figure shown in the state which assembled the adapter which concerns on 1st Embodiment shown in FIG. 1, (a) is the front view, (b) is the side view. It is a figure which shows the aspect at the time of connecting a copper bar and a power cable via the adapter which concerns on 1st Embodiment shown in FIG. 1, (a) adhered to the terminal part of the power cable with respect to the copper bar. FIG. 6B is a front view when the terminals are parallel to each other, and FIG. 5B is a front view when the terminals fixed to the terminal portion of the power cable are twisted by 90 ° with respect to the copper bar. It is a figure which shows the adapter for electric power cable connection which concerns on the 2nd Embodiment of this invention, (a) is a front view which shows an apparatus side fixed terminal, (b) is a front view which shows a cable side fixed terminal. It is a figure shown in the state which assembled the adapter concerning 2nd Embodiment shown in FIG. 4, (a) is the front view, (b) is the side view. It is a figure which shows the aspect at the time of the connection of the copper bar and power cable in a prior art, (a) is the front view, (b) is the top view.

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

<First Embodiment>
1A and 1B are diagrams showing an adapter for connecting a power cable according to a first embodiment of the present invention, where FIG. 1A is a front view showing a device-side fixed terminal, and FIG. 1B is a front view showing a cable-side fixed terminal. It is. As shown in the figure, the device-side fixed terminal 1 includes a device-side terminal body 2 and a receiving portion 3. The device-side terminal body 2 is for abutting and affixing to a copper bar 03 (see FIG. 6; the same applies hereinafter) that is a terminal of an electric device such as a mobile transformer. For this reason, it is formed as a feather plate-like member having a bolt hole 2A corresponding to a bolt hole 03A (see FIG. 6; the same applies hereinafter) formed in the copper bar 03, and the bolt hole 2A is aligned with the bolt hole 03A. The bolt and nut (not shown) which penetrates both in the state are fastened. The receiving portion 3 is integrally formed continuously downward from the device-side terminal body 2 in the axial direction of the power cable 01 (see FIG. 6; the same applies hereinafter), and a notch portion 4 extending in the axial direction is formed in part. A bowl-shaped member having an opening that opens upward.

  The cable side fixed terminal 5 has a head portion 6, a neck portion 7, and a cable side terminal body 8. The head 6 is a member that is formed wider than the notch 4 and is accommodated in the receiving part 3. The neck 7 extends integrally downward from the lower end of the head 6 and is formed to be slightly longer than the notch 4 with a member narrower than the width of the notch 4. The cable-side terminal main body 8 is for abutting and fixing to the power cable 01 (see FIG. 6; the same applies hereinafter). For this reason, it is formed as a wing plate-like member having a bolt hole 8A corresponding to a bolt hole 02A (see FIG. 6; the same applies below) formed in the fixed terminal 02 (see FIG. 6; the same applies hereinafter). The bolt hole 8A is aligned with the bolt and nut (not shown) penetrating both of them.

  The device side fixed terminal 1 and the cable side fixed terminal 5 are assembled in a manner as shown in FIG. 2A and 2B are views showing the assembled adapter according to the present embodiment, in which FIG. 2A is a front view thereof and FIG. 2B is a side view thereof. As shown in both drawings, the neck 7 of the cable-side fixing terminal 5 is pushed into the receiving part 3 through the notch 4 at the time of assembly. Here, since the width of the neck portion 7 is narrower than that of the notch portion 4 and the vertical dimension is slightly longer than that of the receiving portion 3, it can be inserted into the receiving portion 3 without any trouble. Next, the neck portion 7 passes through the bottom portion of the receiving portion 3 and hangs downward. This can be easily performed by utilizing the self-weight acting on the cable side fixed terminal 5. In this state, the cable-side fixed terminal 5 is supported by the device-side fixed terminal 1 via the receiving portion 3 so as to be rotatable around the axis. That is, the angle of the surface of the cable side terminal body 8 with respect to the surface of the device side terminal body 2 can be freely changed. Here, a female screw 9 is cut on the inner peripheral surface of the opening of the receiving portion 3, and a male screw 12 formed on the outer peripheral surface of the lid member 10 is screwed into the female screw 9. Therefore, if the lid member 10 is screwed into the female screw 9, the opening of the receiving part 3 can be closed. Moreover, the position around the axis of the cable side fixed terminal 5 with respect to the apparatus side fixed terminal 1 can also be regulated by this.

  FIG. 3 is a view showing an aspect when a copper bar and a power cable are connected through the adapter according to the present embodiment, and (a) is a diagram in which the fixed terminal fixed to the terminal portion of the power cable is parallel to the copper bar. (B) is a front view when the fixed terminal fixed to the terminal part of the power cable is twisted by 90 ° with respect to the copper bar. As shown in FIG. 5A, when the fixed terminal 02 fixed to the terminal portion of the power cable 01 is parallel to the surface of the copper bar 03, the copper bar 03, which is a terminal on the electric equipment side. The bolt hole 2A of the device side terminal body 2 of the adapter assembled in the manner shown in FIG. 2 is aligned with the bolt hole 03A of the adapter, and both are fastened with bolts and nuts, and then the cable side terminal body 8 is connected to the device side terminal body 2 Are held in parallel. In this state, the posture of the cable side terminal body 8 is regulated by tightening the lid member 10. Finally, the bolt hole 02A of the fixed terminal 02 is aligned with the bolt hole 8A of the cable side terminal body 8, and both are fastened with bolts and nuts.

  On the other hand, as shown in FIG. 5B, when the fixed terminal 02 fixed to the terminal portion of the power cable 01 is twisted by 90 ° with respect to the surface of the copper bar 03, the copper bar 03 is the same as described above. 2 is aligned with the bolt hole 2A of the adapter-side terminal body 2 of the adapter assembled in the form shown in FIG. 2 and fastened with bolts and nuts, and then the cable-side terminal body 8 with respect to the equipment-side terminal body 2 Is rotated 90 °. In such a state, the posture of the cable side terminal body 8 is regulated by tightening the lid member 10, and in this state, the bolt hole 02A of the fixed terminal 02 is aligned with the bolt hole 8A of the cable side terminal body 8, and both Fasten with bolts and nuts.

  According to this embodiment, even if the fixed terminal 02 fixed to the terminal portion of the power cable 01 is twisted by 90 ° with respect to the surface of the copper bar 03, the fixed terminal 02 of the power cable 01 remains in the position as it is. The predetermined connection work between the electric device and the power cable 01 is completed by fixing to the side terminal body 8.

<Second Embodiment>
4A and 4B are diagrams showing an adapter for connecting a power cable according to a second embodiment of the present invention. FIG. 4A is a front view showing a device-side fixed terminal, and FIG. 4B is a front view showing a cable-side fixed terminal. It is. As shown in the figure, the adapter according to the present embodiment has many configurations similar to those of the first embodiment. Therefore, the same parts as those in FIG. As shown in FIG. 4A, the device-side fixed terminal 11 in this embodiment is provided with flange portions 19 and 20 on both sides of the notch portion 4 in the receiving portion 3 with respect to the vertical direction, and between the flange portions 19 and 20. Female screw portions 19A and 20A are formed so that bolts (not shown in FIG. 4) which are fastening members having male screw portions can be screwed together.

  Further, as shown in FIG. 4B, the cable side fixed terminal 5 is not different from the cable side fixed terminal 5 shown in FIG.

  5A and 5B are views showing the adapter according to the second embodiment shown in FIG. 4 in an assembled state. FIG. 5A is a front view thereof, and FIG. 5B is a side view thereof. As shown in the figure, since the receiving portion 3 in this embodiment has flange portions 19 and 20 having female screw portions, after assembling in the same manner as in the first embodiment, finally the flange portion. The head 6 accommodated in the receiving part 3 is tightened by screwing the bolt 21 into the female screw parts 19A, 20A of 19,20. As a result, the attitude of the cable-side fixed terminal 5 with respect to the device-side fixed terminal 11 is specified, and the contact pressure between the inner peripheral surface of the receiving portion 3 and the head 6 is increased to allow contact resistance between the two. As much as possible.

  In the first and second embodiments, the bottom of the receiving portion 3 is formed with a curved surface, and the portion of the head 6 that contacts the bottom is also a curved surface that follows the curved shape. Thus, although it is not essential to have a curved surface shape, this makes it possible to smoothly rotate the cable-side fixed terminal 5 around the axis with respect to the device-side fixed terminals 1 and 11.

  INDUSTRIAL APPLICABILITY The present invention can be used in an industrial field that requires connection between an electric device and a power cable in order to install or operate a temporary power facility.

DESCRIPTION OF SYMBOLS 1, 11 Apparatus side fixed terminal 2 Apparatus side terminal main body 3 Receiving part 4 Notch part 5 Cable side fixed terminal 6 Head 7 Neck part 8 Cable side terminal main body 10 Cover member
19, 20 Flange part 21 Bolt

Claims (4)

A power cable connection adapter for connecting a terminal fixed to a terminal portion of a power cable to a terminal of an electric device,
A device-side terminal body that is in contact with a terminal of the electrical device, and is formed continuously and integrally with the device-side terminal body in the axial direction of the power cable, and a notch portion is formed in part in the axial direction. A fixed terminal on the device side having a bowl-shaped receiving portion,
A head that is formed wider than the notch and is housed in the receiving part, is formed continuously to the head in the axial direction, is formed narrower than the notch, and A cable-side fixed terminal provided with a cable-side terminal main body that is formed continuously with the neck in the axial direction and abuts against the terminal of the power cable. An adapter for connecting a power cable, comprising: In the adapter for connecting a power cable according to claim 1,
An adapter for connecting a power cable, wherein an opening portion of the receiving portion storing the head portion is closed with a lid member. In the adapter for connecting a power cable according to claim 1,
A flange portion is provided on each side of the notch portion in the receiving portion with respect to the axial direction, and a fastening member is inserted between the flange portions so that the head portion accommodated in the receiving portion is fastened by the receiving portion. An adapter for connecting a power cable, characterized by comprising In the adapter for connecting a power cable according to any one of claims 1 to 3,
An adapter for connecting a power cable, wherein a bottom portion of the bowl-shaped receiving portion is formed in a curved surface, and a portion of the head that contacts the bottom portion is a curved surface that conforms to the curved surface shape.

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