JPH0445386Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention is a bypass circuit that can easily install and remove bypass circuits on distribution lines to bypass power outage construction sections. This relates to a terminal mounting structure.

(Prior technology) Conventionally, we have reduced the range of work power outages and shortened the time of work power outages, improved customer services, facilitated the implementation of power outage work, promoted the rationalization of power distribution work, ensured work safety, and reduced the amount of outage power. In order to reduce costs due to a decrease in the number of power outage notification customers, a manual switch for temporary construction work will be installed in advance near the power outage work site to form a bypass circuit for the construction section, and after the work is completed The bypass circuit is being removed.

(Problem that the invention aims to solve) However, in the past, both ends of the bypass circuit were attached to the distribution line using clamp devices, but this was done by tearing the coating of the distribution line, which caused damage to the distribution line and caused damage to the distribution line. However, there have been problems in attaching the clamp device to the power distribution line, in that the power distribution line is swayed by the wind, etc., which makes the work not only troublesome but also unstable. Further, when removing the bypass circuit, there was a problem in that after removing the clamp device, it was necessary to repair the peeled portion of the coating, which was a troublesome work.

Structure of the invention (Means for solving the problem) This invention was made to solve the above-mentioned problem. A bypass terminal for connecting a bypass cable is fixed to a part of the power supply side cable, and a locking recess is provided in the body for either the bypass terminal or the end of the bypass cable. The other side has a pressure receiving surface on the outer periphery, and the inner periphery has locking protrusions corresponding to the locking recesses, and the opening diameter formed between the locking protrusions is always constant. is formed into an elastic female shape having a diameter smaller than the diameter of the tip end of the male shape, and further includes a protective cover provided with a pressing portion that can come into contact with the pressure receiving surface on the outer periphery of the female shape. The gist is that the protection cover is slidably and loosely fitted, and that the protective cover is provided with a biasing member that biases the pressing portion in a direction to reduce the diameter of the female opening via the pressure receiving surface.

(Function) With the above configuration, in order to connect the bypass terminal and the end of the bypass cable to form a bypass circuit, first move the protective cover in the direction of releasing the pressing state of the pressure receiving surface by the pressing part, and then In this state, one male mold is inserted into the opening of the other female mold. Then, the locking protrusion on the female inner circumference locks in the locking recess on the male outer circumference, and the two are electrically connected. Then, when the protective cover is returned to its original state according to the urging force, the pressing part presses the pressure receiving part and the female opening is restricted from moving in the direction of diameter expansion.
The male and female forms are irremovably held in contact. In addition, to release the bypass circuit, after moving the protective cover in the same way as when forming the bypass circuit, simply pull the male and female in the opposite direction to separate them, and the electrical connection between the two is established. will be canceled.

(Example) Hereinafter, an example in which this invention is embodied in an exposed type switch will be described with reference to FIGS. 1 to 6.

The frame 3 of the switch AS, which is attached to a utility pole arm (not shown) via a support fitting 2, supports and fixes the main body insulator 4 facing downward, which houses fixed electrodes on the power supply side and the load side for each phase. are doing. The frame body 3 has an upper frame 3a, a lower frame 3b connected to the upper frame 3a through two support rods 5 arranged at a predetermined distance from each other, and a lower frame 3b that is connected to the upper frame 3a and a lower frame 3b, which is connected to the upper frame 3a and a lower frame 3b, which is connected to the upper frame 3a and a lower frame 3b, which is connected to the upper frame 3a at both upper and lower sides. It is composed of a pair of sliding guide rods 6 connected between frames 3a and 3b.

An elevating table 7 is fitted into the sliding guide rod 6 so as to be slidable in the vertical direction, and a movable insulator 8 corresponding to the space between the main body insulators 4 is fixed upwardly on the upper surface of the elevating table 7.
A movable electrode body 8a is provided at the upper part of the movable insulator 8, and the movable electrode body 8a is formed so that both ends can be inserted into fixed electrodes (not shown) on the power supply side and the load side, respectively, which are housed and fixed in the main insulator 4. ing.

An opening/closing operation mechanism 9 is linked to the lower part of the lifting table 7, and by opening and closing the operating handle 10, the lifting table 7 can be moved up and down via the opening/closing operation mechanism 9.

Connecting terminals 11 connected to fixed electrodes (not shown) on the power supply side and load side are protruded from both outer sides of the main insulator 4 (in FIG. 1, only the connecting terminals 11 on the load side are connected). (Illustrated). The tips of each of the connection terminals 11 are connected to the tips of a power supply cable 12a and a load cable 12b serving as power distribution lines.

The power supply side and load side cables 12a, 12b
The bypass terminal 13 provided in the bypass terminal 13 will be explained. Note that since the bypass terminals 13 provided on both cables 12a and 12b have the same configuration, the bypass terminal 13 on the load side cable 12b will be explained.

The load side cable 12b is separated on the way out from the connection terminal 11, and both separated ends are connected to the cylindrical crimp terminals 1 provided at both ends of the branch fitting 15.
4 and are connected to each other by being caulked. The base end of a male bypass terminal 13 is inserted perpendicularly into the center of the branch fitting 15 from below, and a pair of nuts 16 screwed into the base end are attached to both upper and lower surfaces of the branch fitting 15. It is securely fixed by being tightened.

Both ends of the insulating cover 17 covering the branch fitting 15 are fitted onto the outer periphery of the crimp terminal 14, and an insertion hole 18 through which the bypass terminal 13 is inserted is provided in the center. The bypass terminal 13 has an enlarged diameter portion 13a formed at its distal end, and a small diameter portion constituting a locking recess at its proximal body portion. The tip of the bypass terminal 13 projects downward through the insertion hole 18, and a bottomed cylindrical insulating cap 19 is removably tightly fitted into the protruding tip at its base end. has been done. Note that a groove 20 is formed in the proximal end surface of the insulating cap 19 in the longitudinal direction.

In FIG. 6, a bypass cable 21 forming a bypass circuit is led out from a temporary manual switch S, and an outlet 22 is provided at its tip. This outlet 22 will be explained.

As shown in FIG. 5, in the bypass cable 21, a connecting fitting 2 is attached to the tip of the core wire (not shown)
3 is crimped. A plurality of contacts 24 are engaged with the outer periphery of the tip of the connecting fitting 23, and the contacts 24 are held in place by a pair of garter springs 26 wound around engagement grooves 25 provided on the outer periphery of both ends. tied together to form a shape. A protrusion 27 is projected inward from the tip of the contactor 24, and the diameter of the opening formed between the protrusions 27 as a locking protrusion is larger than the expanded diameter portion 13a provided at the tip of the bypass terminal 13. It is also slightly smaller.
This opening diameter is determined by the garter spring 26.
Due to the elastic force, the diameter portion 13a is elastically maintained slightly smaller than the expanded diameter portion 13a.

A cylindrical protective cover 28 made of an insulating material is slidably disposed around the center outer periphery of the connection fitting 23, and a protrusion 29 serving as an inwardly pressing portion is formed at the tip thereof. Then, the protective cover 28 moves the protrusion 29 onto the contactor 24 according to the biasing force of a biasing spring 34 as a biasing member, which will be described later.
slope 3 as a pressure receiving surface of a protrusion provided on the outer periphery of the
0, the contact 24 is pressed inward.

Further, when the protective cover 28 is moved to the position indicated by the chain line in FIG. 5, the restriction on the contactor 24 is released. A bottom plate 31 is screwed onto the inner periphery of the proximal end of the protective cover 28, and the bottom plate 31 is formed to be slidable on the tip of the bypass cable 21.
Furthermore, a locking step 3 is provided on the inner periphery of the base end of the protective cover 28.
2 is formed, and a locking ring 33 loosely fitted to the contactor 24 is locked. The locking ring 33 can be locked to a garter spring 26 disposed in the engagement groove 25 on the base end side. A biasing spring 34 is wound between the bottom plate 31 of the protective cover 28 and a locking ring 33 that is secured to the garter spring 26, so as to always bias the protective cover 28 toward the proximal end. It's summery.

Now, the operation of the bypass terminal mounting structure constructed as above will be explained.

In the distribution line L divided by switches AS1 to AS4 shown in FIG. 6, when a construction section is between AS1 and AS4, a bypass circuit is formed as follows.

That is, the bypass cable 21 on the power side provided in the temporary switch S is connected via the outlet 22 to the bypass terminal 13 provided on the power source cable 12a in the switch AS1, and the bypass cable 21 on the load side is connected to the bypass cable 21 on the power side provided in the temporary switch S. It is connected via the outlet 22 to the bypass terminal 13 provided on the load side cable 12b of the switch AS4.

The detailed operation will be explained below.

First, the protective cover 28 is moved toward the tip side against the biasing force of the biasing spring 34, and the protrusion 29 is moved to the slope 3.
By separating it from 0, the pressure of the protrusion 29 on the contactor 24 is released. Next, when the tip of the bypass terminal 13 is inserted into the protective cover 28 in this state, the protrusion 27 of each contact 24 is pushed outward by the expanded diameter portion 13a against the elastic force of the garter spring 26. The tip portion of the bypass terminal 13 is allowed to enter into the opening formed between the protrusions 27. When the insertion of the expanded diameter portion 13a is completed and the small diameter portion of the bypass terminal 13 comes to the position of the projection 27, the garter spring 26
The contactor 24 returns inward due to the urging force. Then, the projection 27 is engaged with the outer peripheral surface of the small diameter portion, and the bypass terminal 13 and the contact 24 of the bypass cable 21 are electrically connected. Thereafter, when the protective cover 28 is moved toward the proximal end according to the biasing force of the biasing spring 34 and the protrusion 29 is pressed onto the slope 30 of the contact 24, the protrusion 29 causes the contact 24 to be removed. Since movement in this direction is restricted, the bypass terminal 13 and the contact 24 of the bypass cable 21 cannot be separated from each other and are maintained in good contact.

Further, in order to cancel the bypass circuit, first, the protective cover 28 is moved toward the distal end side against the biasing force of the biasing spring 34, as in the case of forming the bypass circuit. Then, the restriction on the outward movement of the contactor 24 is released. Then, when the male bypass terminal 13 is pulled in the insertion/removal direction from the female contact 24 while expanding the diameter of the opening between the protrusions 27 with the expanded diameter portion 13a, contrary to the process of forming the bypass circuit, the bypass terminal 13 is pulled in the direction of insertion and removal from the female contact 24. Since the terminal 13 and the contactor 24 are easily separated, the electrical connection between them is broken.

Note that this invention is not limited to the above-mentioned embodiments, and for example, the following embodiments can be made without departing from the spirit of this invention.

(1) In the above embodiment, the bypass terminal 13 is male and the contact 24 of the bypass cable 21 is female, but these can be reversed.

(2) In the above embodiment, the load-side and power-side cables 12a and 12b, which serve as distribution lines, are separated in the middle,
The bypass terminal 13 is fixed to the branch fitting 15 provided at this imaginary dividing point. A female bypass terminal 13 is provided in an insertion hole opened on the lower surface of the support insulator.

Effects of the invention As detailed above, this invention has a fixed bypass terminal for connecting the bypass cable to the distribution line, which allows the insulation of the distribution line to be broken when forming the bypass circuit, unlike conventional methods. In order to form a bypass circuit without damaging the distribution line, first move the protective cover in the direction of releasing the pressing state of the pressure-receiving surface by the pressing part, and in that state, By simply inserting the male part into the other female opening, the locking protrusion on the inner periphery of the female locks into the locking recess on the outer periphery of the male, making it easy to electrically connect the two. Furthermore, when the protective cover is returned to its original state according to the urging force, the pressing part presses the pressure receiving part and the female opening is restricted from moving in the direction of diameter expansion, so that electrical The connected male and female shapes can be held in contact with each other in an irremovable manner. In addition, to release the bypass circuit, after moving the protective cover in the same way as when forming the bypass circuit, simply pull the male and female in the opposite direction to separate them, and the electrical connection between the two is established. can be easily released. Therefore, it is an excellent invention for industrial use because it has the excellent effect of improving work efficiency in the work of attaching and removing bypass circuits.

[Brief explanation of the drawing]

Fig. 1 is a cutaway front view of a switch embodying this idea, Fig. 2 is an enlarged sectional view of the main part with the bypass terminal attached, Fig. 3 is an enlarged side view of the main part, and Fig. 4 5 is an enlarged plan view of the main part with the cover removed, FIG. 5 is a half sectional view of the bypass contact, and FIG. 6 is an electric circuit diagram of the bypass circuit. AS...Switch, 12a...Load side cable,
12b...Power supply side cable, 13...Bypass terminal, 21...Bypass cable, 27...Protrusion as a locking protrusion, 28...Protection cover, 29...
...Protrusion as a pressing part, 30... Slope as a pressure receiving surface, 34... Biasing spring as a biasing member.

Claims (1)

[Scope of utility model registration request] A bypass cable 2 is installed in a part of the load-side and power-side cables 12a and 12b as distribution lines derived from a switch (AS) that is always placed on the distribution line.
1, one of the ends of the bypass cable 21 and the bypass terminals 13 is formed into a male shape with a locking recess in the body, and the other is provided with a pressure receiving surface 30 on its outer periphery, and has locking protrusions 27 corresponding to the locking recesses on its inner periphery, and the opening diameter formed between the locking protrusions 27 is always the male shape. The protective cover 28 is formed into an elastic female shape having a smaller diameter than the tip end diameter of the protective cover 28 and is provided with a pressing portion 29 that can come into contact with the pressure receiving surface 30 on the outer periphery of the female shape. The protective cover 2 is arranged so that it can be moved and loosely fitted.
8 includes a biasing member 3 that biases the pressing portion 29 in a direction to reduce the diameter of the female opening via the pressure receiving surface 30;
4. A bypass terminal mounting structure characterized by providing a bypass terminal.