JPH021812Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a housing for a single-wire connection terminal for connecting core wires of coated electric wires each consisting of a single wire.

<Prior art> As is well known, the typical structure of this type of single-wire connection terminal for interconnecting coated wires is to use terminal fittings for connecting a set of wires to be connected, depending on the number of wires. Connecting terminals corresponding to the number of wires are housed in a synthetic resin housing to fix the mutual positions of the wires and prevent short circuits.
A common method is to insert a single conductive wire with the sheath removed from both ends for connection.

The above-mentioned terminal fitting has a member installed therein to hold the conductive wire inserted therein, and has a structure that prevents the conductive wire once inserted from slipping out.

<Problems to be solved by the invention> Therefore, in conventional single-wire connection terminals with this type of structure, the terminal fittings are sealed in a synthetic resin housing that serves as insulation and wire binding. Heat generated by contact resistance between the conductive wire and the terminal fitting when energized tends to accumulate inside the housing, and this accumulated heat can cause the connected part to reach a higher temperature than the allowable limit, causing an accident. So,
In order to prevent such accidents, there was a problem in that the current capacity of the power transmission system was limited.

Therefore, the present invention aims to solve the above-mentioned problems of the conventional example by increasing the surface area of the housing part of the single-wire connection terminal and allowing air to circulate to improve the heat dissipation effect without deteriorating the dielectric strength. purpose.

<Means for Solving the Problems> The structure of the present invention for achieving the object will be explained using FIGS. 1 to 5 corresponding to the embodiments. a cavity 12 into which a single conductive wire k is inserted, and the cavity 1
The housing has a plurality of rectangular connection bodies 11 made of a highly conductive metal arranged side by side, each of which has a stopper body 13 positioned diagonally within the housing 2 and having a stopper body 13 for preventing the conductive wire k from coming off. , the housing is the case body 1
The case body 1 has a plurality of connection bodies 11, 11... A plurality of housing spaces 2, 2, . Covered electric wire K insertion holes 5 are formed in each cover body 1',
Furthermore, circumferential through heat radiation holes 6... which communicate with the central through hole 1a and open to the outer circumferential surface are formed in each of the partition walls 3, 3, . . . 3, 3, . . . are made of a synthetic resin material.

<Function> Since the present invention has such a structure, the heat dissipation hole 6 that penetrates in the longitudinal direction is provided in the partition wall 3 that partitions the housing space in which the connection body 11 corresponding to the conventional terminal fitting is housed. The surface area of the housing that contributes to the heat radiation effect is limited to the heat radiation holes 6.
Since it is considerably wider and air naturally flows through the heat radiation holes 6, the cooling effect is extremely good.

Moreover, the insulation between the plurality of connection bodies 11 is
Since the mutual spacing between the connecting bodies 11 is substantially widened, the dielectric strength is increased compared to the conventional example.

Furthermore, in the above embodiment, regarding the connection of the conductive wire k, when the single conductive wire k is inserted through the insertion hole 5 provided on the side surface of the single wire connection terminal, the conductive wire k is inserted into the inside of the connection body 11. Rotate the rotary blade 13b installed in the counterclockwise direction in the drawing to advance inward, and then
While pushing down the wire 3a, the wire is inserted toward the inner part of the cavity 12 until the covered portion of the wire is inserted into the housing.

On the other hand, a conductive wire to be connected is also inserted and fixed into a gap 12 formed diagonally to the gap 12 inside the connection body 11, and the pair of conductive wires are electrically connected through the connection body 11. Connected.

When an external force is applied to pull the conductive wire outward, the tip of the strip-shaped spring 13a and the biting teeth of the rotary blade 13b are constantly pressed against the conductive wire by elastic force, so that the conductive wire is pulled out. This prevents the conductive wire from falling off from the connection body 11 by being caught in the biting state.

<Examples> Examples of the present invention will be described below based on the drawings.

1 to 5 are diagrams showing a first embodiment of the present invention. In detail, FIG. 2 shows a cross section in the main axis direction of the embodiment, and FIG. 2 shows a cross section perpendicular to the main axis. According to Figure 5, 1 is the housing case body of the single wire connection terminal, which has high mechanical strength.
It is made of synthetic resin with good heat resistance, has a cylindrical shape as a whole, and has a central through hole 1a formed in the longitudinal direction in the center, and a conductive hole as shown in FIG. 1 around the central through hole 1a. Three accommodation spaces 2 for accommodating connection bodies 11 that connect the wires K are formed radially parallel to the main axis, and between each accommodation space 2,
It is partitioned off by a partition wall 3 that is integrally formed with the case body 1.

A plurality of heat dissipation holes 6 communicating with the outside of the case body 1 from the central through hole 1 a are formed in the partition wall 3 .

Further, in the longitudinal outer wall portion 4 of each accommodation space 2 of the case body 1, there is an insertion hole 5 of a size that allows the covered portion of the covered electric wire K to pass through, as shown in FIG. 4 showing the end face of the case body 1. It is formed.

The connection body 11 is a device for connecting the conductive wire k and the conductive wire k', and as shown in FIG. a cavity 12 formed in the hole and into which the conductive wire is inserted;
Retaining bodies 13, which are located within the cavity 12 and have a function of preventing the conductive wire k from coming off, are provided at diagonal positions on both side surfaces.

In this first embodiment, the retaining body 13 is as follows:
A strip spring 13a whose tip is largely curved in the direction of the back wall 12b of the cavity 12 and has an upward elastic force in the drawing, and a spring 13c which has biting teeth on the outer periphery. The rotary blade 13b is always provided with a clockwise rotational elastic force at the top thereof, and is attached by a protrusion 13d and a support shaft 13e so as not to move relative to the bottom wall 12a of the cavity 12.

The conductive wire k inserted through the insertion hole 5 between the retaining body 13 and the upper wall 12c of the cavity 12 against the elastic force and rotational elastic force is connected to the tip of the strip spring 13a. When an external force is applied to pull the conductive wire outward, the strip spring 13
The end of a and the biting teeth of the rotary blade 13b bite into the conductive wire, and the conductive wire is connected to the connection body 11.
prevent it from falling off.

The connection bodies 11 described above are each housed in the housing space 2 of the case body 1, and the lid body 1' is placed thereon and fixed with machine screws 7, so that the lid is in a closed position.

The lid 1' has an insertion hole 5 for inserting the conductive wire k' from the side of the lid 1' as shown in FIG. 3, and the center through hole 1a when the lid is closed. An opening 1a' is provided.

In the first embodiment described above, the retainer 13
Although the machine is equipped with two types of mechanisms, it is possible to use one of these mechanisms and omit the other without impairing its practicality in the slightest, and this makes it possible to reduce the manufacturing cost.

Furthermore, even if brass, which is cheaper, is used as the material for the connection body 11, there is no practical problem because the cross-sectional area of the current path is large and the contact area with the conductive wire k is large.

As a modification of the first embodiment, the case body 1 in the first embodiment is formed into a container shape with a depth that accommodates the rear half of the connection body 11 in the longitudinal direction (in the drawings), and the lid body 1' is connected to the case body 1. It has a structure that is formed to have approximately the same shape and size as the case 1 and can accommodate the front half of the main body 11.

Similarly, in this modification, a covered wire insertion hole 5 is provided in the longitudinal outer wall portion 4' of the lid body 1', and furthermore, similar to the case body 1, a central through hole 1a and a heat dissipation hole are provided in a portion corresponding to the partition wall 3. 6 is formed.

Next, the three connection bodies 11 are housed so as to cover each other from the front and back, and are assembled using machine screws 7.

This modification has the effect of reducing the unit price of parts and parts management cost by making the case body 1 and the lid body 1' substantially the same shape and making them common parts with the case body 1.

FIG. 6 shows a second embodiment, in which a heat dissipation hole 6 leading to the outside from a central through-hole 1a of the case body 1 is arranged parallel to the wall surface of the housing space 2, and the inside of the case body is completely filled with the partition wall 3 remaining. The shape is such that it expands outward from 1.

The relationship with the connection body 11 and the assembly method are as follows.
Although it is similar to the actual historical example, in this example, the heat radiation hole 6
Since the surface area of the cooling air is large and the fluid resistance of the cooling air is low, the cooling effect is increased.

9 and 8 show a third embodiment and a modification thereof, in which the heat dissipation holes 6 in the second embodiment are extended to the entire space between the partition walls 3 surrounding adjacent accommodation spaces 2. FIG. 8 shows an example in which there are three accommodation spaces 2 for accommodating the connection body 11, and FIG. 9 shows an example in which there are four accommodation spaces 2.

In these embodiments, the single wire connection terminal housing is formed almost only by partition walls, has a large heat dissipation area, and has good cooling air circulation, so that it has an extremely excellent cooling effect.

In the above-mentioned embodiments, for example, an embodiment that accommodates four connection bodies is used for two single-phase power systems, and an embodiment that uses three connection bodies is used for a three-phase power transmission system. Needless to say, it can also be applied to a case where two pieces are accommodated or a set of four or more pieces is housed depending on the situation.

Although the single-wire connection terminal housing according to the present invention has been described in detail based on the examples considered to be representative, the embodiments of the single-wire connection terminal housing according to the present invention are not limited to the structure of the above-mentioned embodiments. In a housing that accommodates multiple connection bodies, cooling of the housing for each connection body is achieved by forming a cooling air flow path for each connection body housing while ensuring dielectric strength between each connection body. The structure for increasing the surface area may be modified as appropriate and implemented as long as it has the constituent features described in the claims described above, exhibits the function of the present invention, and has the effects described below.

<Effects of the Invention> As is already clear from the above description, the single wire connection terminal housing according to the present invention has the following effects.

(1) Cooling air circulates inside the housing and near each storage section, so the temperature rise during use is smaller than in the past. A comparison with a conventional example without heat dissipation holes shows that the temperature rise is kept to a low level of about 5 to 6%, which clearly shows the heat dissipation effect of the present invention.

Therefore, the current capacity can be increased in a product comparable to the conventional product.

(2) As a single wire connection terminal, it has few components and has a simple structure, making it easy and inexpensive to manufacture.

(3) It is easy to use, as all you have to do is store the connection body in the case body and insert the covered wires from both sides. Therefore, working time can be shortened.

Due to the above advantages, it has the effect of providing a single-wire connection terminal that has a large current capacity, a small temperature rise, no risk of accidents, is easy to manufacture, is inexpensive, and can be used. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of the connecting body and the arrangement inside the case body according to the first embodiment of the present invention;
Fig. 2 is a side sectional view in the main axis direction of the first embodiment, Fig. 3 is an end view taken from the lid body side along the - line in Fig. 2, and Fig. 4 is a side view of the case main body along the - line in Fig. 2. End view seen from the side, Figure 5 is the second
6 is a vertical sectional view of the second embodiment, FIG. 7 is a vertical sectional view of the housing of the third embodiment, and FIG. 8 is a vertical sectional view of the housing of the modified example. . In the figure, 1 is the case body, 1' is the lid body, 2 is the housing space, 3 is the partition wall, 4 is the longitudinal outer wall part, 5 is the insertion hole, 6 is the heat radiation hole, 11 is the connection body, 12 is the cavity, 13 is a retainer.

Claims (1)

[Scope of claim for utility model registration] A single conductive wire k whose coating has been peeled off from a covered electric wire K
A rectangular parallelepiped-shaped connection body made of a highly conductive metal, which has a cavity 12 into which the conductive wire k is inserted, and a retainer 13 located in the cavity 12 and responsible for preventing the conductive wire k from coming off. 11 are arranged in parallel inside the housing, the housing is composed of a case body 1 and a lid body 1', and is formed into a generally cylindrical shape as a whole, and has a central through hole extending in the longitudinal direction in the center part. 1a is formed, and the case body 1
A plurality of housing spaces 2, 2, . , 2... are provided with covered electric wires K on the longitudinal outer wall portion 4 and the lid body 1', respectively.
Insertion holes 5 are formed, and each of the partition walls 3,
Circumferential heat dissipation holes 6 communicating with the central through hole 1a and opening on the outer peripheral surface are formed in the portions 3 and 3, respectively, and the case body 1, lid 1' and partition walls 3, 3 are made of synthetic resin. Single wire connection terminal housing made of material. The retaining body 13 is a strip-like spring 13.
A single wire connection terminal housing as set forth in claim 1 of the utility model registration claim (a). The single wire connection terminal housing according to claim 1, wherein the retainer 13 is a rotary blade 13b having biting teeth on the outer circumference. A single wire connection terminal housing according to claim 1, wherein the connection body 11 is made of copper. A single wire connection terminal housing according to claim 1, wherein the connection body 11 is made of brass. The single wire connection terminal housing according to claim 1, wherein the case body 1 is formed into a cylindrical shape to accommodate the entire connection body 11, and the lid body 1' is formed into a disk shape. The case body 1 is formed into a short cylindrical shape that accommodates approximately half the length of the connection body 11, and the lid body 1'
The single wire connection terminal housing according to claim 1, wherein the single wire connection terminal housing is formed into a short cylindrical shape having substantially the same shape and size as the case body 1. The single wire connection terminal housing according to claim 1, wherein the heat dissipation hole 6 has a shape that expands toward the outside of the case body 1, leaving a portion of the partition wall 3 having a constant thickness. The single wire connection terminal housing according to claim 1, wherein two accommodation spaces 2, 2, . . . are formed with a partition wall 3 interposed therebetween. The single wire connection terminal housing according to claim 1, wherein three housing spaces 2, 2, . . . are formed with a partition wall 3 interposed therebetween. The single wire connection terminal housing according to claim 1, wherein four housing spaces 2, 2, . . . are formed with partition walls 3 interposed therebetween.