JP6927931B2 - Unit cable for indoor wiring - Google Patents

Description

The present invention relates to a unit cable used for indoor wiring.

In recent years, a room unit that has been unitized for each room such as the entrance, living room, and bedroom is manufactured at the factory of the housing manufacturer, and these are assembled at the construction site according to the wishes of the owner and the site shape, so that one room can be completed. Prefabricated housing construction method is known. In the prefabricated house construction method, wiring for each room unit is also performed in the factory in advance, and this wiring makes it possible to achieve simplification of indoor wiring work. In order to achieve simplification of indoor wiring work, it is effective to use an indoor wiring unit cable provided with a joint box.

As a conventional unit cable for indoor wiring, for example, a technique as disclosed in Patent Document 1 is known. As shown in FIG. 7 of Patent Document 1, in a conventional unit cable for indoor wiring, an insulating thermosetting resin (epoxy resin or the like) 4 is filled and molded inside a joint box, and the connection is branched and connected. A structure that fixes and protects the part is adopted. As the conventional unit cable for indoor wiring, a 2-core cable, a 3-core cable, or the like is used depending on the application. The connection portion of the insulated wire core 1 constituting the cable 2 is connected by using a crimping sleeve 3.

As other unit cables for indoor wiring, those having various structures are known. For example, there is one that uses a plug-in connector instead of the crimping sleeve. By adopting the plug-in connector in this way, the connection can be facilitated. In addition, there is also a case in which a cable holder (cable fastening portion) is provided in the housing of the joint box without using the thermosetting resin, and the cable is held by the cable holder. Even if an external force is applied in the pulling direction of the cable while the cable is held by the cable holder in this way, it is possible to prevent the connection state of the connection portion from being affected.

Japanese Unexamined Patent Publication No. 2009-21118

By the way, in the prior art, a cable made of a copper conductor (hereinafter referred to as "copper conductor") is connected. Here, since the copper conductor has a relatively large mass, when the operator manually wires the cable in the indoor wiring work, the burden of handling is heavy for the operator, and the transportation and installation of the cable, the cable extension, etc. There was a problem that the workability was poor.

Therefore, in order to solve the above problems, it is conceivable to adopt a conductor made of aluminum or an aluminum alloy as the conductor constituting the cable. However, when a cable including a conductor made of aluminum or an aluminum alloy is adopted, the following problems can be raised.

That is, since the mating terminal metal fittings (for example, the terminal metal fittings of the distribution board, the appliances in each room, the wiring equipment, etc.) are made of copper, when connected to a conductor made of aluminum or an aluminum alloy, they can be used for a long period of time. There is a problem that corrosion between dissimilar metals may occur.

Further, on the surface of a conductor made of aluminum or an aluminum alloy, a thick oxide film is formed in air as compared with a copper conductor. Since the oxide film has a high specific resistance value, when trying to connect (crimp) a conductor made of aluminum or an aluminum alloy to the connection terminal, it is necessary to achieve contact conduction between the conductor and the connection terminal while destroying the oxide film. be. However, when trying to connect a conductor made of aluminum or an aluminum alloy to a connection terminal (a connection terminal for connecting a copper conductor) in the prior art, there is a possibility that the oxide film cannot be sufficiently destroyed only by the crimping load at the time of connection. rice field. If the oxide film cannot be sufficiently destroyed in this way, there is a problem that the contact resistance between the conductor and the connection terminal may increase, which may affect the electrical connection performance between the conductor and the connection terminal. rice field.

The present invention has been made in view of the above circumstances, and provides an indoor wiring unit cable capable of improving electrical connection performance as compared with the conventional one while improving workability in indoor wiring work as compared with the conventional one. Is the subject.

The unit cable for indoor wiring according to claim 1, which is made to solve the above problems, includes a joint box and a joint box.
Multiple cables with exposed insulation cores in the terminal,
A cable connection portion that connects the cables to each other and is housed in the joint box,
A terminal having a conductor connecting portion into which the conductor of the insulating wire can be inserted and connected to the conductor, and an electrical contact portion continuous with the conductor connecting portion.
With
The conductor is made of aluminum or an aluminum alloy.
The cable connection portion and the terminal are formed of a material different from that of the conductor.
Before SL conductor connecting portion, provided with a water stop means capable of preventing the invasion of water from outside,
Before Kitomesui means,
It is configured to include a sealing member is fitted on the outside of the front Symbol conductor connecting portion, and sealing material filled in the sealing member,
The sealing member fitted to the outside of the conductor connecting portion is
It is formed in a tapered shape that is continuous with one end of the tubular portion that can accommodate the conductor connecting portion and the tubular portion that can accommodate the conductor connecting portion and that the diameter gradually decreases toward the tip end side. It is characterized by including a tubular portion formed so that the electrical contact portion can be derived.

According to the present invention having the above characteristics, since the conductor of the cable constituting the unit cable for indoor wiring is made of aluminum or an aluminum alloy, the unit cable for indoor wiring adopting a conventional copper conductor cable. It is lighter than.

Further, according to the present invention, by providing the oxide film breaking means (concavo-convex portion) at the connection portion in the cable connection portion of the indoor wiring unit cable, when the conductor is connected to the cable connection portion, it is generated on the outer surface of the conductor. The oxide film formed can be destroyed. By breaking the oxide film in this way, it is possible to obtain a good connection between conductors made of aluminum or an aluminum alloy without interposing an oxide film.

Further, according to the present invention, when the joint box is not filled with the thermosetting resin for sealing the cable connection portion, the cable connection portion is provided with a water blocking means (sealing material) to connect the cable. It is possible to prevent water from entering the part from the outside. By preventing the above-mentioned water ingress in this way, it is possible to prevent corrosion between dissimilar metals caused by the presence of water in the cable connection portion.

Further, according to the present invention, since the conductor is connected to the terminal in the terminal of the unit cable for indoor wiring, the unit cable for indoor wiring and the mating terminal metal fitting (for example, the distribution board, the appliances in each room, and the wiring) The connection with the terminal metal fittings of the device or the like can be made between terminals made of the same material (copper). By connecting terminals made of the same material in this way, corrosion between dissimilar metals caused by long-term use can be prevented.

Further, according to the present invention, when the work of connecting the terminal to the conductor is performed at the manufacturing factory of the unit cable for indoor wiring, the step of destroying the oxide film on the outer surface of the conductor is performed in the manufacturing process of the unit cable for indoor wiring. Since it is included, the terminal and the terminal of the unit cable for indoor wiring can be satisfactorily connected. Further, when the work of connecting the terminal to the conductor is performed at the construction site of the unit cable for indoor wiring, the conductor connecting portion is connected to the conductor because the oxide film breaking means (concavo-convex portion) is formed in the conductor connecting portion. At that time, the oxide film formed on the outer surface of the conductor can be destroyed by the oxide film breaking means. By breaking the oxide film in this way, it is possible to obtain a good connection between the conductors without interposing the oxide film.

Further, according to the present invention, by providing the conductor connecting portion of the terminal with a water blocking means, it is possible to prevent water from entering the connection portion between the conductor made of aluminum or an aluminum alloy and the conductor connecting portion from the outside. By preventing the inundation in this way, it is possible to prevent corrosion between dissimilar metals caused by the presence of moisture at the connection portion between the conductor and the conductor connecting portion.

According to the present invention, by adopting a conductor made of aluminum or an aluminum alloy, the weight is reduced as compared with a unit cable for indoor wiring that employs a conventional copper conductor cable, so that an operator can easily perform wiring work. Become. Further, it is possible to obtain a good connection without interposing an oxide film at the connection portion and to prevent the occurrence of corrosion between dissimilar metals. Therefore, according to the present invention, there is an effect that the electrical connection performance can be improved as compared with the conventional one while the workability in the indoor wiring work can be improved as compared with the conventional one.

It is a front view which shows Example 1 of the unit cable for indoor wiring which concerns on this invention. It is a perspective view which shows the terminal of the cable which constitutes the unit cable for indoor wiring. It is a perspective view which shows the cable connection terminal, (a) is the perspective view when the cable connection terminal is seen from the front side, (b) is the perspective view when the cable connection terminal is seen from the rear side. It is a figure for demonstrating the work of connecting a cable connection terminal to a conductor of an insulated wire core, and is the perspective view which shows the state before connecting the cable connection terminal to a conductor. It is a figure for demonstrating the work of connecting the cable connection terminal to the conductor of an insulated wire core, and is the perspective view which shows the state which connected the cable connection terminal to a conductor. It is a perspective view which shows the modification of the cable connection terminal in Example 1, (a) is the perspective view which shows the modification 1, and (b) is the perspective view which shows the modification 2. It is a perspective view which shows the connection terminal for a cable in Example 2 of the unit cable for indoor wiring which concerns on this invention. It is a perspective view which shows the sealing member, (a) is the perspective view when the sealing member is seen from the front side, (b) is the perspective view when the sealing member is seen from the rear side. It is a perspective view which shows the state which the sealing member is fitted on the outside of the conductor connection part in the state which connected the cable connection terminal to the conductor of an insulated wire core.

Hereinafter, with reference to FIGS. 1 to 6, the implementation of the indoor wiring unit cable according to the present invention will be performed with reference to the first embodiment of the indoor wiring unit cable according to the present invention, and with reference to FIGS. 7-9. Example 2 will be described respectively.

FIG. 1 is a front view showing Example 1 of an indoor wiring unit cable according to the present invention, FIG. 2 is a perspective view showing a terminal of a cable constituting the indoor wiring unit cable, and FIG. 3 is a perspective view showing a cable connection terminal. It is a figure, (a) is a perspective view when the cable connection terminal is viewed from the front side, (b) is a perspective view when the cable connection terminal is viewed from the rear side, and FIG. It is a figure for demonstrating the work of connecting a cable connection terminal, and is the perspective view which shows the state before connecting the cable connection terminal to a conductor, FIG. FIG. 6 is a perspective view showing a state in which a cable connection terminal is connected to a conductor, and FIG. 6 is a perspective view showing a modified example of the cable connection terminal in the first embodiment. a) is a perspective view showing the modified example 1, and (b) is a perspective view showing the modified example 2.
The arrows in the figure indicate the front-back direction (each direction of the arrow is assumed to be an example).

In FIG. 1, reference numeral 1 indicates Example 1 of the unit cable for indoor wiring according to the present invention. The indoor wiring unit cable 1 includes a plurality of cables 2, a plurality of plug-in connectors (not shown), a plurality of cable connection terminals 3 (see FIG. 3), and a joint box 4. Hereinafter, each configuration of the unit cable 1 for indoor wiring will be described.

First, the cable 2 will be described.
The cable 2 shown in FIG. 2 is not particularly limited, but is a known VVF cable, and includes two insulating wire cores 5 and a sheath 6 for covering them. The number of insulated wire cores 5 is an example. Further, the above VVF cable is an example, and other cables may be used. In this embodiment, six cables 2 are used (not limited to this number).

As shown in FIG. 4, the end of the cable 2 has a sheath 6 peeled off to a predetermined length, and two insulating wire cores 5 are exposed side by side in a row. As shown in FIG. 4, each of the exposed terminals of the insulated core 5 has the insulator 7 peeled off to expose the conductor 8.

The conductor 8 is made of aluminum or an aluminum alloy. Here, aluminum has a specific gravity of 2.7 g / cm ³ . On the other hand, the specific gravity of copper is 8.9 g / cm ³ . As described above, the specific gravity of aluminum is about 1/3 of the specific gravity of copper. Therefore, since the conductor 8 of the indoor wiring unit cable 1 including the cable 2 is made of aluminum or an aluminum alloy, it is lighter than the indoor wiring unit cable that employs a copper conductor cable. ..

Since the conductor 8 is made of aluminum or an aluminum alloy, a thick oxide film is formed on the outer surface of the conductor 8 in air as compared with the copper conductor. Since the oxide film has a high specific resistance value, when the conductor 8 is to be connected to the connector connection terminal or the cable connection terminal 3 (see FIG. 3) described later, the conductor 8 and the above connector are broken while the oxide film is destroyed. It is necessary to ensure contact conduction with the connection terminal for the cable and the connection terminal 3 for the cable.

Next, the plug-in connector will be described.
The plug-in connector corresponds to the "cable connection portion" described in the claims. Although not particularly shown, the plug-in connector is a member that is connected to the terminal of the cable 2 and connects the cables 2 to each other. In this embodiment, the plug-in connector is configured to be attached to the terminal of the cable 2 by simply inserting the insulated wire core 5. The plug-in connector includes a housing and a connector connection terminal housed in the housing (terminal accommodating portion).

The housing is made of an insulating synthetic resin material and is formed in a substantially box shape. The housing includes an insulated wire core insertion port formed on one side surface and a terminal accommodating portion formed in the housing and communicating with the insulated wire core insertion port. Such a housing is provided with a water blocking means capable of preventing water from entering the terminal accommodating portion from the outside. Specifically, the above-mentioned "water stopping means" is a gel-like sealing material filled in the terminal accommodating portion.

The connector connection terminal is formed by pressing a conductive metal plate. Here, the above-mentioned "conductive metal plate" is made of copper. The connector connection terminal is provided with an oxide film breaking means at a position (connection point) where it comes into contact with the conductor 8. Specifically, the above-mentioned "oxide film breaking means" is a concavo-convex portion formed so that a concave portion and a convex portion are continuous (assuming that this is an example). The uneven portion is formed so that the oxide film formed on the outer surface of the conductor 8 can be destroyed when the insulating wire core 5 is inserted into the insertion connector.

The oxide film breaking means is not limited to the uneven portion, and other treatments for increasing the surface roughness of the contact portion may be performed.

As the cable connection portion, for example, a crimping sleeve (not shown) may be adopted in addition to the above-mentioned plug-in connector. The crimping sleeve has an uneven portion formed on the inner surface. The uneven portion is formed so that the oxide film formed on the outer surface of the conductor 8 can be destroyed when the crimping sleeve is crimped. When such a crimping sleeve is adopted, as a means for preventing water from entering from the outside, for example, a gel-like sealing material is filled in the crimping sleeve, or the crimping sleeve is crimped and then insulated on the outside of the crimping sleeve. The tube may be fitted.

Next, the cable connection terminal 3 will be described.
The cable connection terminal 3 illustrated in FIG. 3 corresponds to the "terminal" described in the claims. The cable connection terminal 3 is formed of a conductive metal material and is formed in a rod shape. Here, the above-mentioned "metal material having conductivity" is made of copper. The cable connection terminal 3 is connected to the conductor 8 of the insulating wire core 5 in the terminal of the cable 2 on the side opposite to the side attached to the plug connector. As shown in FIG. 3, the cable connection terminal 3 includes an electrical contact portion 9 and a conductor connection portion 10 continuous with the electrical contact portion 9.

The electrical contact portion 9 illustrated in FIG. 3 is provided so as to be arranged on the front side in the front-rear direction of the cable connection terminal 3. The electrical contact portion 9 is a portion that is in contact with and electrically connected to a partner terminal fitting (for example, a distribution board, a terminal fitting of an appliance in each room, a wiring device, etc.) (not shown), and is formed in a columnar shape. There is. The shape of the electrical contact portion 9 is not limited to the above shape. In addition, other shapes described later may be used.

The conductor connecting portion 10 illustrated in FIG. 3 is provided so as to be arranged on the rear side of the cable connecting terminal 3 in the front-rear direction, and is formed so as to be continuous with the rear end of the electrical contact portion 9. The conductor connecting portion 10 is a portion that is electrically connected to the conductor 8, and is formed in a tubular shape whose front end side is closed by the electrical contact portion 9. A conductor insertion port 11 is formed at the rear end of the conductor connecting portion 10. The conductor insertion port 11 communicates with the inside of the conductor connecting portion 10. The inside of the conductor connecting portion 10 is a portion filled with a gel-like sealing material (water blocking means), and is formed so that the conductor 8 can be inserted. To connect the cable connection terminal 3 to the conductor 8, the conductor connection portion 10 is crimped after the conductor 8 is inserted into the conductor connection portion 10 in a state where the inside of the conductor connection portion 10 is filled with a sealing material. Do it by. The configuration of the conductor connecting portion 10 is not limited to the above configuration. In addition, other configurations described later may be used.

Although not particularly shown, an uneven portion (oxide film breaking means) is formed on the inner surface 12 of the conductor connecting portion 10. The uneven portion is formed so that the oxide film formed on the outer surface of the conductor 8 can be destroyed when the conductor connecting portion 10 is crimped.

The oxide film breaking means is not limited to the uneven portion, and other treatments for increasing the surface roughness of the contact portion may be performed.

Next, the joint box 4 will be described.
The joint box 4 illustrated in FIG. 1 is formed of a synthetic resin material having an insulating property and is formed in a box shape. Although not particularly shown, the joint box 4 houses the terminal side of the cable 2 and a plug-in connector for connecting the cables 2 to each other. In the joint box 4, the joint box 4 is formed with a cable outlet 13 for leading out the cable 2 on the lower surface thereof.

A cable holder (not shown) may be provided inside the joint box 4 to hold the cable 2. Here, the cable holder may have a holding force that does not affect the connection state between the cables 2 even if an external force in the cable pulling direction is applied while holding the cable 2. preferable.

Next, the assembly work of the unit cable 1 for indoor wiring will be described.
First, the terminal of the cable 2 shown in FIG. 2 is processed in advance. Specifically, as shown in FIG. 4, at both ends of the cable 2, the sheath 6 is peeled off to a predetermined length so that the two insulating wire cores 5 are exposed. Further, in the terminal of the exposed insulating wire core 5, the insulator 7 is peeled off to leave the conductor 8 in an exposed state.

Next, the cables 2 are connected to each other with a plug-in connector. Specifically, first, one end side of the plurality of cables 2 and the plug-in connector are arranged inside the joint box 4. The inside of the housing (terminal accommodating portion) of the plug-in connector shall be filled with a gel-like sealing material in advance. After that, the insulated wire core 5 is inserted into the plug-in connector, and the cables 2 are connected to each other.

Here, the operation when the cables 2 are connected to each other by the plug-in connector will be described.
According to this embodiment, the connector connection terminal of the plug-in connector is provided with an uneven portion (oxide film breaking means) at a portion (connection portion) in contact with the conductor 8, so that the plug-in connector is provided with an insulating wire core 5. When inserted, the oxide film formed on the outer surface of the conductor 8 can be destroyed by the uneven portion. By breaking the oxide film in this way, a good connection can be obtained between the conductors 8 without interposing the oxide film.

Further, according to the present embodiment, when the thermosetting resin is not filled in the joint box 4, the plug-in connector is filled with a sealing material (water-stopping means) to accommodate the plug-in connector (terminal accommodation). It is possible to prevent water from entering the part) from the outside. By preventing the ingress of water in this way, it is possible to prevent corrosion between dissimilar metals caused by the presence of water between the connector connection terminal and the conductor 8 in the plug-in connector.

Next, the cable connection terminal 3 is connected to the conductor 8. By the way, the work of connecting the cable connection terminal 3 to the conductor 8 is performed at the manufacturing factory of the indoor wiring unit cable 1 or at the construction site of the indoor wiring unit cable 1. Here, when the above connection is made in the manufacturing factory, it is assumed that the step of breaking the oxide film on the outer surface of the conductor 8 is included. Then, after the step of breaking the oxide film is completed, as shown in FIG. 4, the cable connection terminal 3 is moved in the direction indicated by the arrow A, and is attached to the other end side (attached to the plug connector) of the plurality of cables 2. The conductor 8 of the insulated wire core 5 at the terminal on the side opposite to the side to be connected) is inserted into the inside of the conductor connecting portion 10 from the conductor insertion port 11. The inside of the conductor connecting portion 10 is filled with a sealing material in advance. Then, by crimping the conductor connecting portion 10, the conductor connecting portion 10 is connected to the conductor 8 as shown in FIG. Further, when connecting at the construction site, when the conductor connecting portion 10 is connected to the conductor 8 as shown in FIG. 5, the oxide film is destroyed at the uneven portion by the same procedure as described above. As described above, the assembly work of the unit cable 1 for indoor wiring is completed.

Here, the operation when the cable connection terminal 3 is connected to the conductor 8 will be described.
According to this embodiment, since the conductor 8 is connected to the cable connection terminal 3, the indoor wiring unit cable and the terminal metal fitting (for example, the terminal of the distribution board, the appliances in each room, the wiring equipment, etc.) The connection with the metal fitting) can be a connection between terminals made of copper. By connecting terminals made of the same material (copper) in this way, corrosion between dissimilar metals caused by long-term use can be prevented.

According to this embodiment, when the work of connecting the cable connection terminal 3 to the conductor 8 is performed at a manufacturing factory, in the manufacturing process of the indoor wiring unit cable 1, the step of destroying the oxide film on the outer surface of the conductor 8 is performed. Therefore, the terminal of the indoor wiring unit cable 1 and the cable connection terminal 3 can be satisfactorily connected. Further, when the connection work is performed at the construction site, the uneven portion is formed on the inner surface of the conductor connecting portion 10, so that when the conductor connecting portion 10 is connected to the conductor 8, the conductor 8 is formed at the uneven portion. The oxide film formed on the outer surface of the surface can be destroyed. By breaking the oxide film in this way, a good connection can be obtained between the conductors 8 without interposing the oxide film.

Further, according to the present embodiment, by filling the conductor connecting portion 10 of the cable connection terminal 3 with a sealing material, it is possible to prevent water from entering the connection portion between the conductor 8 and the conductor connecting portion 10 from the outside. Can be done. By preventing the inundation in this way, it is possible to prevent corrosion between dissimilar metals caused by the presence of moisture at the connection portion between the conductor 8 and the conductor connecting portion 10.

In the indoor wiring unit cable 1 of the present embodiment described above, even if the cable connection terminal 3 is replaced with the modification 1 shown in FIG. 6A or the modification 2 shown in FIG. 6B. It should be good. Hereinafter, a modified example of the cable connection terminal 3 in this embodiment will be described with reference to FIG.

<Modification example 1>
The cable connection terminal 20 illustrated in FIG. 6A is similar in basic configuration and structure to the cable connection terminal 3 (see FIG. 3) in this embodiment. The cable connection terminal 20 is different from the cable connection terminal 3 in this embodiment in that the shape of the electrical contact portion 21 is formed into a rectangular parallelepiped shape.

<Modification 2>
The cable connection terminal 30 illustrated in FIG. 6B is similar in basic configuration and structure to the cable connection terminal 3 (see FIG. 3) in this embodiment. The cable connection terminal 30 is different from the cable connection terminal 3 in the present embodiment in that the shape of the electrical contact portion 31 is formed into a hexagonal column shape.

The modified example of the cable connection terminal 3 in this embodiment is not limited to the above modified examples 1 and 2. In addition, the shape of the electrical contact portion is not particularly shown, but may be a polygonal prism shape other than the above.

<Other variants>
As a modification of the cable connection terminal 3 in this embodiment other than the above, although not shown in particular, for example, the shape of the electric contact portion 9 shown in FIG. It may be formed in a shape like a contact portion. By forming the electrical contact portion into the shape as described above, the cable connection terminal can be connected to the terminal block.

Next, the effect of this embodiment will be described.
As described above with reference to FIGS. 1 to 6, according to the present embodiment, by adopting the conductor 8 made of aluminum or an aluminum alloy, for indoor wiring using a conventional copper conductor cable. Since it is lighter than the unit cable, it is easier for the operator to perform the wiring work. Further, it is possible to obtain a good connection without interposing an oxide film at the connection portion and to prevent the occurrence of corrosion between dissimilar metals. Therefore, according to this embodiment, it is possible to improve the workability in the indoor wiring work as compared with the conventional case, and to improve the electrical connection performance as compared with the conventional case.

In addition, according to this embodiment, the following effects are obtained.
That is, in this embodiment, one end side (the terminal attached to the plug connector) and the other end side (the side to which the cable connection terminal 3 is connected) of the plurality of cables 2 are connected to the connection points from the outside. Since the treatment for preventing water ingress is performed, there is no possibility that water will be transmitted between the insulating wire cores 5 even when the thermosetting resin is not filled in the joint box 4. Therefore, according to this embodiment, even when the thermosetting resin is not filled in the joint box 4, the waterproof performance of the indoor wiring unit cable 1 can be improved.

As the unit cable for indoor wiring according to the present invention, in addition to the first embodiment, the following second embodiment may be used. Hereinafter, the second embodiment will be described with reference to FIGS. 7-9.

FIG. 7 is a perspective view showing a cable connection terminal in the second embodiment of the indoor wiring unit cable according to the present invention, FIG. 8 is a perspective view showing a sealing member, and FIG. 8A is a perspective view of the sealing member from the front side. (B) is a perspective view when the sealing member is viewed from the rear side, and FIG. 9 is a perspective view when the sealing member is viewed from the rear side. It is a perspective view which shows the state which the member was fitted.
The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

This embodiment is different from the first embodiment in that the cable connection terminal 40 shown in FIG. 7 and the insulating tube 50 shown in FIG. 8 are provided. Hereinafter, the cable connection terminal 40 and the insulating tube 50 will be described.

First, the cable connection terminal 40 will be described.
The cable connection terminal 40 illustrated in FIG. 7 is similar in basic configuration and structure to the cable connection terminal 3 (see FIG. 3) in the first embodiment. The cable connection terminal 40 is different from the cable connection terminal 3 in the first embodiment in that the front end side of the conductor connection portion 42 is formed in a tubular shape that is not blocked by the electrical contact portion 41. Such a conductor connecting portion 42 has a structure in which a gel-like sealing material cannot be filled therein.

Next, the insulating tube 50 will be described.
The insulating tube 50 illustrated in FIG. 8 corresponds to the "sealing member" described in the claims. The insulating tube 50 is formed of an insulating synthetic resin material, and is formed into a tubular shape having different diameters on the front end side and the rear end side. As shown in FIG. 9, the insulating tube 50 is formed so that it can be fitted to the outside of the conductor connecting portion 42 in a state where the cable connecting terminal 40 is connected to the terminal of the insulated wire core 5. There is.

The insulating tube 50 shown in FIG. 8 includes a terminal outlet 51, a terminal insertion port 52, and a sealing material filling portion 53. The terminal outlet 51 is formed at the front end of the insulating tube 50 so that the electrical contact portion 41 can be led out in a state where the insulating tube 50 is fitted to the outside of the conductor connecting portion 42 as shown in FIG. Is formed in. The terminal insertion port 52 is formed so that the cable connection terminal 40 can be inserted from the front end side when the insulating tube 50 is fitted to the outside of the conductor connection portion 42. The encapsulant filling portion 53 communicates with the terminal outlet 51 and the terminal insertion port 52, and is formed as a space for filling a gel-like encapsulant (not shown).

As the sealing member, for example, a crimping sleeve (not shown) may be used in addition to the insulating tube 50. Similar to the insulating tube 50, this crimping sleeve is formed with a sealing material filling portion inside which a gel-like sealing material is filled.

Next, the connection work between the conductor 8 and the cable connection terminal 40, and the water stop treatment at this connection location will be described.
First, the conductor 8 (see FIG. 4) of the insulating wire core 5 is inserted into the conductor connecting portion 42 from the conductor insertion port 41 shown in FIG. 7. After that, the conductor connecting portion 42 is crimped to connect the conductor 8 and the conductor connecting portion 42. As described above, the connection work between the conductor 8 and the cable connection terminal 40 is completed.

After that, the insulating tube 50 is fitted to the outside of the conductor connecting portion 42. Specifically, first, the cable connection terminal 40 is inserted into the terminal insertion port 52 from the front end side (electrical contact portion 41 side). The sealing material filling portion 53 is filled with the sealing material in advance. After that, the insulating tube 50 is moved to the outside of the conductor connecting portion 42 and fitted. As described above, the water stop treatment at the connection point between the conductor 8 and the cable connection terminal 40 is completed.

Here, the operation when the insulating tube 50 is fitted to the outside of the conductor connecting portion 42 will be described.
According to this embodiment, by filling the sealing material filling portion 53 of the insulating tube 50 with the sealing material, it is possible to prevent water from entering the connection portion between the conductor 8 and the conductor connecting portion 10 from the outside. By preventing the inundation in this way, it is possible to prevent corrosion between dissimilar metals caused by the presence of moisture at the connection portion between the conductor 8 and the conductor connecting portion 10.

Next, the effect of this embodiment will be described.
As described above with reference to FIGS. 7-9, the present embodiment has the same effect as that of the first embodiment.

In addition, it goes without saying that the present invention can be modified in various ways without changing the gist of the present invention.

In the above description, the indoor wiring unit cable has a configuration in which both the cable connection portion and the conductor connection portion are provided with oxide film destruction means, but the oxide film destruction means is provided on either the cable connection portion or the conductor connection portion. It is effective even if it is provided.

Further, in the above description, the indoor wiring unit cable is configured to have water blocking means at both the cable connecting portion and the conductor connecting portion, but the water stopping means is provided at either the cable connecting portion or the conductor connecting portion. It is effective even if it is provided.

1 ... Unit cable for indoor wiring, 2 ... Cable, 3, 20, 30, 40 ... Cable connection terminals (terminals), 4 ... Joint box, 5 ... Insulated conductor, 6 ... Sheath, 7 ... Insulator, 8 ... Conductor, 9, 21, 31, 41 ... Electrical contact part, 10, 22, 32, 42 ... Conductor connection part, 11, 43 ... Conductor insertion port, 12, 24, 34, 44 ... Inner surface, 13 ... Opening, 50 ... Insulation tube (sealing member), 51 ... terminal outlet, 52 ... terminal insertion port, 53 ... sealing material filling part

Claims (1)

With a joint box
Multiple cables with exposed insulation cores in the terminal,
A cable connection portion that connects the cables to each other and is housed in the joint box,
A terminal having a conductor connecting portion into which the conductor of the insulating wire can be inserted and connected to the conductor, and an electrical contact portion continuous with the conductor connecting portion.
With
The conductor is made of aluminum or an aluminum alloy.
The cable connection portion and the terminal are formed of a material different from that of the conductor.
Before SL conductor connecting portion, provided with a water stop means capable of preventing the invasion of water from outside,
Before Kitomesui means,
It is configured to include a sealing member is fitted on the outside of the front Symbol conductor connecting portion, and sealing material filled in the sealing member,
The sealing member fitted to the outside of the conductor connecting portion is
It is formed in a tapered shape that is continuous with one end of the tubular portion that can accommodate the conductor connecting portion and the tubular portion that can accommodate the conductor connecting portion and that the diameter gradually decreases toward the tip end side. A unit cable for indoor wiring, comprising: a tubular portion formed so that the electrical contact portion can be led out.

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