JPH0715825B2 - Plug-in type connection device with retaining mechanism - Google Patents

Description

The present invention relates to a fixed electrode member and a movable electrode that can be inserted into and removed from the fixed electrode member in a low-voltage side outlet of an electric device such as a secondary side bushing of a transformer. The present invention relates to a plug-in type connection device having an opening / closing function with a member, and particularly to provision of a plug-in type connection device provided with a retaining mechanism between a movable electrode member and a fixed electrode member.

[Conventional technology]

FIG. 4 shows an example of a conventional plug-in type connection device, in which a fixed-side electrode member Ef is projectingly provided on an outer jacket wall C of an electric device Tr such as a transformer, and an L-shaped movable electrode member is provided on the fixed-side electrode member Ef. It is configured so that the Em can be inserted and removed freely. Fixed side electrode member Ef
Is a female terminal such as a tulip contact connected to an electrode rod (not shown) that penetrates the outer wall C of the electric device.
The T ₁ covered with a resin mold cylinder Mf such as rubber, the resin molding cylinder Mf is engaged from the inside through the mantle wall C, and bolted in retainer member P from the outside of the mantle wall C, the retainer member A male screw S is engraved on the outer periphery of the distal end of a cylindrical portion that extends coaxially from P onto the molded cylinder Mf. In one movable side electrode member Em, a male terminal T ₂ is attached to one end of an L-shaped conductor rod B embedded in a mold cylinder Mm, and a flange F is formed at one end of the mold cylinder Mm. The ring R with the female screw is loosely fitted on the outer peripheral surface continuing to the above.

Then, the movable side electrode member Em is the fixed side electrode member Em.
When inserted into Ef, the male terminal T ₂ is inserted into contact with the female terminal T ₁ and the female threaded ring R is screwed into the male thread S to prevent the movable side electrode member Em from coming off. Was there.

In addition, W is a secondary side cable and is spliced to the conductor rod B.

[Problems to be Solved by the Invention]

Such a plug-in type connection device tends to be seen as safe at first glance by maintaining electrical continuity of the male and female terminal contact portions by screw connection, but it is likely that a slight vibration occurs when the electric device Tr is energized. As a result, the female threaded ring R is rotated and loosened, and electrical connection between both electrode members is cut off, which may lead to a serious accident such as power failure.

Locking metal fittings are generally used as a means to prevent loosening of screw connections, but the addition of such metal fittings has the drawback of increasing the number of parts and the number of work steps, especially when electrical equipment is used as a pillar. However, since such work is performed at a high place where the scaffold is unstable, there are problems such as falling of parts and shaking of limbs.

In view of such problems of the prior art, the present invention aims to prevent the movable side electrode member, which can be freely inserted into and removed from the fixed side electrode member arranged in the electric device, from being removed by screwing. An object of the present invention is to provide a plug-in type connection device of this kind which can prevent the loosening of the screw connection due to the above and can surely prevent the screw connection without increasing the number of special work steps.

[Means for Solving the Problems]

The plug-in type connecting device of the present invention made to achieve such an object is such that one of the electrode members is provided with irregularities on the front surface of the male threaded ring loosely fitted to the supporting surface with stopper provided around the electrode member, and the other. And a male threaded ring screwed with the female threaded ring is arranged around the electrode member, and a flange having unevenness for slidingly engaging the unevenness of the female threaded ring is provided so as to be elastically deformable. It is a thing.

Such a flange is formed by using an elastic material such as rubber, and when it is provided on the movable side electrode member, it can be obtained by forming a part of the resin mold cylinder of the electrode member itself to be raised. it can.

[Action]

When the movable side electrode member is inserted into the fixed side electrode member,
The male and female terminals of both electrode members are in contact with each other, and the female threaded ring loosely fitted on one electrode member is screwed into the male thread ring of the other electrode member to maintain such terminal contact conduction. In the case of coupling, while the female threaded ring is screwed and propelled to the male threaded ring, the unevenness of the female threaded ring slides on the uneven surface while elastically displacing the flange,
Then, when the predetermined tightening is completed, the elastically displaced flange elastically returns to the original protruding state and meshes with the unevenness of the internally threaded ring, which prevents inadvertent rotation of the internally threaded ring. . The engagement of the concavity and convexity of the female threaded ring and the concavity and convexity of the flange is maintained by the pressing force of the flange against the ring unless artificial operation is applied, and when the female threaded ring is loosened by the rotating operation, the flange is The elastic displacement causes incidental release.

〔Example〕

1 and 2 show a preferred embodiment of a plug-in type connection device with a retaining mechanism according to the present invention, in which 1 is an outer wall of a transformer or the like, 2 is a penetrating wall, and 2 The movable side electrode member 3 in which the fixed side electrode member 3 protruding from the fixed side electrode member 2 can be freely inserted into and removed from the fixed side electrode member 2, and 4 is a retaining mechanism configured to be detachable between the two electrode members 2 and 3. .

In the fixed-side electrode member 2, a resin-molded cylinder 6 made of rubber or the like in which a conductor rod 5 is embedded and penetrated through an outer wall 1 of an electric device such as a transformer, is locked by a flange 7, and is further provided with a box-shaped press fitting 8. And is fastened to the jacket wall 1 with bolts 9. As a result, the male connection port 6a of the resin mold cylinder 6 is projected from the outer wall 1, and the female terminal 10 such as a tulip contact having the root fitted to the conductor rod 5 is inserted into the male connection port 6a. It is built in.

The inner end of the conductor rod 5 is projected into the outer jacket wall 1 to be used for connection with the in-device conductor. Then, from the front surface of the pressing metal member 8, a cylindrical portion 8a coaxial with the male type connection port portion 6a is integrally projected, and a ring-shaped stopper 11 is caulked and fixed to the outer periphery of the tip portion thereof. It forms a support surface of a retaining mechanism which will be described later.

On the other hand, the movable electrode member 3 is a conductor rod in one arm portion of a resin molded cylinder 12 made of rubber or the like and formed in a substantially L shape.
13 is embedded and a rod-shaped male terminal 14 connected to this conductor rod at a right angle at one end is coaxially arranged in a female connection port 12a formed in the other arm of the resin mold cylinder 12. I am letting you. A cable connecting sleeve is integrally provided at the other end of the conductor rod 13, and the outside thereof is covered by a cover 15 whose one end is fitted to the end of the resin mold cylinder 12. Reference numeral 24 is a bush provided to be fitted into the cable insertion hole of the cover 15.

The retaining mechanism 4 has a ring 16 with a female screw that is loosely fitted on the tubular portion 8a provided in the fixed electrode member 2.
And the resin mold cylinder 12 in the other movable electrode member 3
And a male threaded ring 17 fitted on the outer peripheral surface of the female connection opening 12a, and an elastically deformable flange 18 formed by its own projection on the outer periphery of the female connection opening 12a. Has been done.

As shown in FIG. 3, the female threaded ring 16 is formed with a projection 19 for holding a tool on the outer peripheral surface and can be screwed onto the male threaded portion of the male threaded ring 17 on the inner peripheral surface.
In addition to forming 20, a shoulder 21 is formed by bending the rear peripheral edge inward to engage with the stopper 11 provided on the cylindrical portion, and further, a substantially trapezoidal irregularity 22 is formed on the front peripheral edge. .
Such a female threaded ring 16 can be manufactured by casting, and therefore the formation of such irregularities can be easily performed without cutting.

On the other hand, the flange 18 is, as shown in FIG.
A part of the resin mold cylinder projects at a right angle from the vicinity of the fitting position of the male threaded ring 17 and is formed as a plate ring which is elastically displaceable as shown by the chain double-dashed line. The substantially trapezoidal unevenness 23 having the same shape as the unevenness 22 is formed in an annular shape.

In the plug-in type connecting device configured as described above, when the movable side electrode member 3 is inserted into the fixed side electrode member 2 penetratingly arranged in the outer jacket wall 1 and protrudingly provided, The mold terminal 14 is fitted into and contacts the female terminal 10 to achieve predetermined electrical conduction, and the female connection port 12a is fitted on the male connection port 6a on the resin mold cylinders 12 and 6 to each other. The electrical insulation protection is achieved for the electrical connection portion that is continuously connected. Then, the female threaded ring 16 is moved onto the female connection port portion 12a and screwed into the male threaded ring 17. At this time, as the screwing of the female threaded ring 16 reaches the final state, the unevenness 22 on the front surface thereof abuts the unevenness 23 of the flange 18, and the flange 18 is shown by a chain double-dashed line when the respective protruding parts abut each other. As described above, the female threaded ring is elastically displaced rearward so that the concavity and convexity 22 of the female threaded ring slides on the concavity and convexity 23 of the flange, so that the engagement with the male threaded ring is promoted.

When the screwing of the female threaded ring 16 is in the final state,
By stopping the unevenness 22 at a position where the concave portion and the convex portion face the unevenness 23 of the flange, the flange 18 elastically displaced rearward elastically returns to the front and the unevenness 23 presses the unevenness 22 of the ring. The female threaded ring 16 is brought into close contact with the female threaded ring 16 and is prevented from rotating.

The unevenness of the flange, which is a part of the resin mold cylinder, presses and comes into close contact with the unevenness of the female threaded ring to prevent the female threaded ring from loosening and also serve as a watertight wall that does not allow water to enter through the screw joint. You can

When the movable electrode member 4 is pulled out, the female screw ring is forcibly rotated and loosened to elastically displace the flange as described above to release the detent state, and the female screw ring is removed. It may be performed after releasing the screwed state with the male threaded ring.

It should be noted that the above-described embodiment is a preferable embodiment even if it gets tired of, and the invention is not limited to this and various modifications and applications can be made without departing from the technical idea of the present invention. obtain.

For example, an elastically deformable flange is projected in a substantially L shape so that the outer peripheral surface of the female threaded ring can be covered.
By providing unevenness on the inner peripheral surface that is the covering surface, and fitting the unevenness on the outer peripheral surface of the female threaded ring 16 with a large number of projections 19 (resultingly having recesses between the projections), A predetermined detent mechanism may be configured.

However, in that case, it is essential that approximately half of the protrusion 19 is exposed to enable the engagement of the tool, and the unevenness on the front peripheral edge of the ring 16 can be omitted.

Further, as another embodiment, it is possible to provide a female threaded ring on the movable side electrode member side and provide a male threaded ring and a flange having irregularities on the fixed side electrode member side. In that case, it is important to make the surface of the mold cylinder of the movable side electrode member the free fitting surface of the female screw ring, and to project a flange that serves as a stopper on the mold cylinder. It is possible to substitute it by screwing the outer peripheral surface of the integrally extending cylindrical portion, and further, by applying a resin molding member such as rubber to the outer periphery of the cylindrical portion, a flange that can be elastically deformed by a protrusion by the molding member. It is good to form.

〔The invention's effect〕

As is apparent from the above description, according to the plug-in type connection device with the retaining mechanism of the present invention, the fixed side and movable side electrode members are provided on each of the fixed side and the movable side electrode members without the need for a separate rotation preventing component. In association with the screwing of the female threaded ring and the male threaded ring, the loosening prevention between the two rings is accomplished, and therefore, in the plug-in type connection device equipped with the retaining mechanism by screw coupling, the retaining mechanism The loosening of the screw connection can be achieved without any increase in the number of work steps, and it is possible to provide a safe and reliable plug-in type connection device even when it is used as a pillar product.

[Brief description of drawings]

1 (a) and 1 (b) are partially sectional front views and right side views showing an embodiment of a plug-in type connection device with a retaining mechanism according to the present invention, and FIG. The main part of the side electrode member is shown, (a) is a partial front view, (b) is a partial side view seen from AA ′ in (a), and (c) is a BB in (b). ′ Is a partial view, FIG. 3 shows a female threaded ring of the same device, (a) is a partially sectional front view, (b) is a right side view, and (c) is a same (b). C-C '
It is the partial view seen more. FIG. 4 is a front explanatory view showing an example of a conventional plug-in type connection device with a retaining mechanism. In the figure, 1 is an outer wall of an electric device, 2 is a fixed-side electrode member, 3
Is a movable electrode member, 4 is a retaining mechanism, 8a is a tubular portion, 11
Is a stopper, 12 is a resin mold cylinder, 16 is a female threaded ring, 17 is a male threaded ring, 18 is an elastically deformable flange, 22 is an unevenness in the female threaded ring, and 23 is an unevenness in the flange.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kaoru Hibino 3-25 Inabaji-cho, Nakamura-ku, Nagoya, Aichi Prefecture, Chuo Electric Power Co., Inc. (72) Inventor Eitaro Morimura 1 Aichi-cho, Kasugai-shi, Aichi Address Aichi Electric Co., Ltd. (72) Inventor Hisanori Oike 1 Upper Small Hand, Inuyama City, Aichi Prefecture Energy Support Co., Ltd. (72) Inventor Saikichi Kichi, 1-1 Hidakacho, Hitachi City, Ibaraki Prefecture Hitachi Electric Wire Co., Ltd. Hidaka Factory

Claims (2)

[Claims] 1. A fixed-side electrode member protrudingly provided on an outer wall of an electric device, a movable-side electrode member that can be inserted into and removed from the fixed-side electrode member, and these two electrode members are detachably associated with each other. A plug-in connection device configured to include a retaining mechanism, wherein the retaining mechanism is loosely fitted to a supporting surface with stopper provided around one electrode member and faces the other electrode member. There is a female threaded ring having irregularities on the side surface, a male threaded ring arranged so as to be screwed with the female threaded ring around the other electrode member, and a concavo-convex portion for slidingly engaging the irregularities of the female threaded ring. And a flange that is provided so as to be elastically deformable, and a plug-in type connection device with a retaining mechanism. 2. The stopper-equipped supporting surface is provided by a tubular portion fixed to an outer jacket of an electric device and extending around a fixed-side electrode member and having a stopper at a projecting end, and the tubular portion is provided with a female screw ring. Is loosely fitted, one male screw ring is fixed to the outer periphery of the resin mold cylinder of the movable side electrode member, and the flange is formed by the protrusion of the resin mold cylinder itself of the movable side electrode member. A plug-in type connection device with a retaining mechanism according to claim 1.