JP6978293B2 - Power cable unit and connector unit - Google Patents

Description

The present invention relates to a technique for distributing the power of a three-phase AC power supply to a plurality of loads by a power cable.

For example, a lighting device installed in a tunnel and lit by electric power supplied from an external three-phase AC power source is known (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-185905

By the way, in the tunnel, a number of lighting devices according to the length of the tunnel are installed. Power supplied from an external power source is distributed to each lighting device by a power cable laid in the tunnel. The power cable includes a trunk cable extending along the tunnel and a plurality of connection cables branched from the trunk cable and connected to each lighting device.

Therefore, when distributing the power from the three-phase AC power supply to multiple luminaires in the tunnel, divide the luminaires into multiple groups and apply power of different phases to the luminaires of each group via the connection cable. It is conceivable to distribute. By differentiating the phase of the power distributed to each luminaire for each group, it is possible to prevent the power of a specific phase from being unevenly supplied to the luminaire and to make the power of each phase evenly consumed by a plurality of luminaires. Can be done.

However, in that case, it is necessary to thin out the electric wires corresponding to the phase of the electric power that is not supplied to the lighting device of the connection partner to form the connection cable. Power cables with different phases of wires to be thinned out for each group of lighting devices to be connected take time and effort to design and manufacture, and the energization test after manufacturing becomes troublesome.

Moreover, when the specifications of the luminaire change, the entire power cable including the connection cable connected to the luminaire with the changed specifications is supplied in order to supply the power of the phase according to the changed specifications to the luminaire. It needs to be replaced with one that meets the new specifications.

Alternatively, instead of replacing the entire power cable, it becomes necessary to disassemble the branch point of the trunk cable and replace the connection cable that connects to the lighting device with the changed specifications with the connection cable of the new specifications.

The present invention has been made in view of the above circumstances, and an object of the present invention is to divide the load of a plurality of lighting devices installed in equipment such as a tunnel into a plurality of groups, and to divide the load of each group into different three-phase AC power supplies. We provide a power cable unit that can be used when distributing phase power, is easy to design and manufacture, and can easily handle specification changes due to load replacement, and a connector unit suitable for this power cable unit. To do.

In order to achieve the above object, the connector unit according to the first aspect of the present invention is
And three power supply side connector line terminal is arranged in the pin receiving chamber respectively corresponding to the phases of the three-phase AC,
By fitting with the power supply side connector, it is connected to two power supply side terminals to be connected among the three power supply side terminals, and the connection is made according to the posture in the rotation direction around the fitting direction with the power supply side connector. two load-side terminals of two components of the power supply side terminal of the target is changed are arranged in a pin receiving chamber, have a load side terminal corresponding to one power source side terminal of the non-connected among the three power-side terminal With the load side connector that is not
To prepare for.

According to the connector unit according to the first aspect of the present invention, when the posture of the load side connector when mating with the power supply side connector is changed, the load of the load side connector out of the three power supply side terminals of the power supply side connector is changed. The breakdown of the two terminals to which the side terminals are connected changes.

Therefore, when dividing multiple loads installed in the equipment into multiple groups and distributing the power of different phases of the three-phase AC power supply to the loads for each group, the power supply side is connected to the power cable on the three-phase AC power supply side. Connect the connector and connect the load side connector to the load side power cable. Then, the load-side connector is fitted to the power supply-side connector in a posture corresponding to the phase of the power distributed to the load.

At this time, the power cable on the three-phase AC power supply side to which the power supply side connector is connected is composed of a cable having an electric wire corresponding to all three power supply side terminals of the power supply side connector and corresponding to all three phases of power. be able to.

On the other hand, the load-side power cable that connects the load-side connector shall consist of a cable that has wires that correspond to the two load-side terminals of the load-side connector and that support only the power of the two phases supplied to the load. Can be done.

Then, between the mated power supply side connector and the load side connector, the two load side terminals of the load side connector correspond to the posture of the load side connector among the three power supply side terminals of the power supply side connector. It is connected to two power supply side terminals.

Therefore, of the three phases of the three-phase AC power supply, the power of the two phases corresponding to the two power supply side terminals to be connected to the power supply side connector to which the two load side terminals come into contact with each other depending on the posture of the load side connector. Is distributed from the power cable on the three-phase AC power supply side to the power cable on the load side via both connectors.

For example, if the load specifications change and the phase of the power supplied to the load changes, fit the load side connector connected to the power cable of the load with the changed specifications into the power supply side connector in the posture according to the changed specifications. You just have to match. After changing the phase of the power supplied from the power cable on the three-phase AC power supply side to the power cable on the load side via both connectors by changing the posture of the connector on the load side when mating to the connector on the power supply side. It changes to the phase according to the load specifications of.

Therefore, when dividing multiple loads installed in the equipment into multiple groups and distributing the power of different phases of the three-phase AC power supply to the loads of each group, it is easy to design and manufacture, and it is possible to change the specifications by replacing the load. It is possible to use a power cable that can be handled with simple work.

Further, the connector unit according to the second aspect of the present invention is the connector unit according to the first aspect of the present invention.
A grounding terminal is further arranged in the terminal accommodating chamber of the power supply side connector.
In the terminal accommodating chamber of the load side connector, the two load side terminals are connected to the two power supply side terminals to be connected by fitting with the power supply side connector, and the two load side terminals are connected to the power supply side connector. Further, a grounding terminal connected to the grounding terminal of the power supply side connector by fitting is further arranged.

According to the connector unit according to the second aspect of the present invention, in the connector unit according to the first aspect of the present invention, the load side connector is fitted to the power supply side connector in a posture corresponding to the phase of the power distributed to the load. , The grounding terminals of both connectors are connected to each other.

Therefore, by fitting the load-side connector to the power supply-side connector in an appropriate posture, the power supply circuit and the grounding circuit between the three-phase AC power supply side and the load can be formed at the same time.

Further, the connector unit according to the third aspect of the present invention is the connector unit according to the first or second aspect of the present invention, in which the terminals of the terminal accommodating chamber of the power supply side connector are rotationally symmetric in the rotational direction. It is placed in each position.

Further, according to the connector unit according to the third aspect of the present invention, when the number of terminals in the terminal accommodating chamber of the power supply side connector is n in the connector unit according to the first or second aspect of the present invention, the power supply side connector. Each terminal of the power supply side connector is arranged at a position symmetrical about n times in the rotation direction of the load side connector.

Therefore, the two load-side terminals of the load-side connector are connected by a simple operation of changing the posture of the load-side connector with respect to the power supply-side connector by 2π / n (an angle of 1/1 n of 360 °) in the rotation direction. By changing the breakdown of the two power supply side terminals of the power supply side connector, the phase of the power distributed from the three-phase AC power supply to the load can be changed.

Further, the connector unit according to the fourth aspect of the present invention is the connector unit according to the first, second or third aspect of the present invention.
The load-side connector includes a plurality of types of load-side connectors that are fitted to the power supply-side connector in different postures.
Each type of load-side connector has an identification mark on the surface corresponding to its own type.
The power supply side connector has the posture matching mark for each type of the load side connector having the same appearance as the identification mark of each type of the load side connector at different positions on the surface thereof.
The identification mark of the load-side connector of each type is arranged on a surface connected to the surface on which the posture alignment mark of the same appearance of the power supply-side connector in which the load-side connector is fitted in a normal posture is arranged. ..

According to the connector unit according to the fourth aspect of the present invention, in the connector unit according to the first, second or third aspect of the present invention, when each type of load-side connector is fitted with the power supply-side connector in a normal posture. , The surface on which the identification mark of the load-side connector is arranged and the surface on which the attitude matching mark of the power supply-side connector having the same appearance as the identification mark are arranged are arranged in a row.

On the other hand, when each type of load-side connector mates with the power supply-side connector in an incorrect posture, the surface on which the load-side connector identification mark is placed and the posture matching mark of the power supply-side connector that has the same appearance as this identification mark are placed. The surface is not arranged in a row.

Therefore, the identification mark of the load side connector fitted to the power supply side connector and the attitude matching mark of the power supply side connector having the same appearance as this identification mark are arranged on the planes of the power supply side connector and the load side connector so as to be connected to each other. Whether or not the load-side connector is fitted to the power supply-side connector in a normal posture can be easily determined.

Further, the power cable unit according to the fifth aspect of the present invention is
A trunk cable that extends to the equipment and transmits power for each phase of the three-phase AC power supply,
A plurality of branch cables that are branched from the trunk cable and transmit power of each phase of the three-phase AC power supply, and
A plurality of connection cables connected to a plurality of loads installed in the facility and having two feeder lines corresponding to the powers of the two phases supplied to the load among the powers of each phase of the three-phase AC power supply.
A power supply side connector and a load side connector provided at the connection portion between each branch cable and each connection cable are provided.
As the power supply side connector and the load side connector, the power supply side connector and the load side connector of the connector unit according to the first, second, third or fourth aspect of the present invention are used.

According to the power cable unit according to the fifth aspect of the present invention, the power supply side connector of each branch cable branched from the trunk cable and the load side connector of each connection cable are fitted, and each load is supplied to a three-phase AC power supply. By connecting to, the effect obtained by the connector unit according to the first, second, third or fourth aspect of the present invention can be obtained.

According to the present invention, when a plurality of loads installed in a facility are divided into a plurality of groups and the power of different phases of a three-phase AC power supply is distributed to the loads of each group, the design and manufacture are easy and the load is replaced. The power of the three-phase AC power supply can be distributed to each load by using a power cable unit that can easily handle specification changes.

It is explanatory drawing which shows the schematic structure of the power cable unit which distributes the electric power of each phase of a three-phase AC power source to a plurality of loads according to one Embodiment of this invention. (A) is a front view seen from the fitting surface side of the power supply side connector of FIG. 1, and (b) is a front view seen from the fitting surface side of the load side connector of FIG. (A) is an explanatory view schematically showing the arrangement of the power supply side terminal and the grounding terminal arranged in the terminal accommodating chamber of the power supply side connector of FIG. 2A when viewed from the fitting surface side of the power supply side connector. In b) to (d), the arrangement of the power supply side terminal and the grounding terminal arranged in the terminal accommodation chamber of each load side connector for RS phase, ST phase, and TR phase of FIG. 2B is the load side connector. It is explanatory drawing which shows typically when viewed from the fitting surface side of. FIG. 3 is a perspective view showing a state in which the power supply side connector of FIG. 3A and the load side connector of FIG. 3B are fitted in a normal posture.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same or equivalent parts and components are designated by the same or equivalent reference numerals throughout the drawings.

The embodiments shown below exemplify an apparatus or the like for embodying the technical idea of the present invention, and the technical idea of the present invention describes the material, shape, structure, arrangement, etc. of each component. It is not specific to the following. The technical idea of the present invention can be modified in various ways within the scope of claims.

FIG. 1 is an explanatory diagram showing a schematic configuration of a power cable unit that distributes power of each phase of a three-phase AC power supply to a plurality of loads according to an embodiment of the present invention. The power cable unit 1 of the present embodiment shown in FIG. 1 transfers the power of each phase of the three-phase AC power supply to the lighting device 200 (corresponding to the load in the claim) in the tunnel 100 (corresponding to the equipment in the claim). It transmits electricity.

Although only one lighting device 200 is shown in FIG. 1 for the sake of legibility of the drawing, a plurality of lighting devices 200 are installed in the tunnel 100 at intervals according to the length of the tunnel 100. ing. Each lighting device 200 includes, for example, a light source such as a high-pressure sodium lamp, a fluorescent lamp, a metal halide lamp, a ceramic metal halide lamp, a low-pressure sodium lamp, a fluorescent mercury lamp, and a light emitting diode (LED), and a drive circuit for a light source including a power supply circuit. is doing.

The power cable unit 1 has a trunk cable 3 laid in the tunnel 100, a branch cable 5 branched from the branch portion 7 of the trunk cable 3, and a connection cable 9 connected to the branch cable 5. ..

Although only one branch portion 7 of the trunk cable 3 is shown in FIG. 1 for the sake of legibility of the drawing, the trunk cable 3 has a plurality of branch portions 7 spaced apart from each other according to the length of the tunnel 100. It is provided at the same time. The power cable unit 1 has a plurality of branch cables 5 branched from the trunk cable 3 at each branch portion 7, and a plurality of connection cables 9 connected to each branch cable 5.

The trunk cable 3 is a power cable that draws the power of the three-phase AC power supply into the tunnel 100 from the outside of the tunnel 100. The trunk cable 3 is composed of a cable in which four insulated wires of feeding lines 3r, 3s, 3t and a grounding wire 3e corresponding to each phase of RST are covered with a sheath (insulation coating).

Each branch cable 5 is a power cable that distributes the power of the three-phase AC power supply drawn into the tunnel 100 to each lighting device 200. Each branch cable 5 is composed of a cable in which four insulated wires of a feeder line 5r, 5s, 5t and a grounding wire 5e corresponding to each phase of the RST are covered with a sheath (insulation coating).

Each branch portion 7 is provided in the middle of the trunk cable 3. Each branch portion 7 is covered with an insulating mold 7a. In each insulating mold 7a, one end of each branch cable 5 is connected to the trunk cable 3.

Specifically, the core wires of the feeder lines 3r, 3s, 3t and the ground wire 3e exposed by peeling off the sheath and the insulating coating of the trunk cable 3, and the supply exposed by peeling off the sheath and the insulating coating of each branch cable 5. The electric wires 5r, 5s, 5t and the core wire of the ground wire 5e are connected in the insulating mold 7a.

Each connection cable 9 is a power cable that transmits the power of the three-phase AC power supply distributed from the main cable 3 to each branch cable 5 to each lighting device 200. The power cable unit 1 of the present embodiment has a plurality of three types of connection cables 9a to 9c of RS phase, ST phase, and TR phase as a plurality of connection cables 9.

Of these, each RS phase connection cable 9a is a cable in which three insulating wires of two feeder lines 9r, 9s and a ground wire 9e corresponding to the two phases of RS out of the three phases of RST are covered with a sheath. It is composed of.

Further, each connection cable 9b of the ST phase is a cable in which the three insulating wires of the two feeder lines 9s and 9t and the ground wire 9e corresponding to the two phases of the ST out of the three phases of the RST are covered with a sheath. It is configured.

Further, each connection cable 9c of the TR phase is a cable in which three insulating wires of the two feeder lines 9t and 9r and the ground wire 9e corresponding to the two phases of TR out of the three phases of RST are covered with a sheath. It is configured.

That is, each type of connection cable 9a to 9c can be composed of a common cable in which three insulated wires are covered with a sheath.

One end of each type of connection cable 9a to 9c is connected to each of the drive circuits of a plurality of lighting devices 200 of each group divided into three groups.

The connector unit 10 according to the embodiment of the present invention is used for connecting the other end of each branch cable 5 and the other end of each connection cable 9 (9a to 9c).

The connector unit 10 of the present embodiment has a power supply side connector 11 connected to the other end of each branch cable 5 and a load side connector 13 (13a) connected to the other end of each connection cable 9 (9a to 9c). ~ 13c) and.

Each power supply side connector 11 is composed of a male connector. As shown in the front view of FIG. 2A seen from the fitting surface side, the connector housing 11a of each power supply side connector 11 has a connector hood 11b. The connector hood 11b has a regular quadrangular opening whose four corners are arcuate. That is, the connector hood 11b has a rotationally symmetric shape in the rotational direction Y around the depth direction X (corresponding to the fitting direction in the claims) from the opening.

The connector hood 11b is provided with two misfit prevention keys 11c protruding toward the outside of the connector hood 11b.

A terminal accommodating chamber 11d is formed inside the connector hood 11b. As shown schematically in the explanatory diagram of FIG. 3A, the terminal accommodating chamber 11d has terminal pins 11r, 11s, 11t for power supply corresponding to each phase of RST (corresponding to the power supply side terminal in the claim). ) And the grounding terminal pin 11e (corresponding to the grounding terminal in the claim) are arranged. Each terminal pin 11r, 11s, 11t, 11e has the same structure.

The terminal pins 11r, 11s, 11t, and 11e are projected from the back side of the terminal accommodating chamber 11d toward the opening side (from the back surface side to the front surface side on the paper surface of FIG. 2A) along the depth direction X. ing. Further, the terminal pins 11r, 11s, 11t, and 11e are arranged at rotationally symmetric positions in the rotation direction Y, respectively.

The core wires of the feeder wires 5r, 5s, 5t and the ground wire 5e exposed by peeling off the sheath and the insulating coating at the other end of each branch cable 5 are connected to the terminal pins 11r, 11s, 11t, 11e, respectively.

As shown in FIG. 2A, a lock beak 11f is formed on the upper portion of the connector housing 11a. Further, a centering groove 11g is formed in the innermost part of the terminal accommodating chamber 11d. The centering groove 11g is configured by crossing a vertical groove and a horizontal groove in a + shape. The crossing center of the centering groove 11g is at the same position as the rotationally symmetric center of each terminal pin 11r, 11s, 11t, 11e.

Each load-side connector 13 includes three types of load-side connectors 13a to 13c, RS-phase, ST-phase, and TR-phase, which are connected to RS-phase, ST-phase, and TR-phase connection cables 9a to 9c, respectively.

Each load-side connector 13 (13a to 13c) shown in FIG. 1 is composed of a female connector. As shown in the front view of FIG. 2B seen from the fitting surface side, the connector housing 13d of each load side connector 13 (13a to 13c) has a connector hood 13f. A front holder 13g is provided inside the connector hood 13f.

An annular space 13h is formed between the connector hood 13f and the front holder 13g. The annular space 13h has a shape and a size into which the connector hood 11b of the power supply side connector 11 can be inserted.

The connector hood 13f is formed with two misfit prevention key grooves 13i toward the outside of the connector hood 13f. In each misfit prevention key groove 13i, each misfit prevention key 11c of the power supply side connector 11 in which the connector hood 11b is inserted into the annular space 13h and fitted with the load side connectors 13 (13a to 13c) is a connector. It is inserted from the opening side of the hood 13f.

The structure in which the misfit prevention key 11c of the power supply side connector 11 is inserted into the misfit prevention key groove 13i of the load side connectors 13a to 13c may be omitted.

Four pin insertion holes 13j, 13k, 13l, 13m and a centering protrusion 13n are formed on the front surface of the front holder 13g.

The pin insertion holes 13j, 13k, 13l, and 13m are arranged at rotationally symmetric positions in the rotation direction Y around the depth direction X (corresponding to the fitting direction in the claims) of the connector hood 13f. The terminal pins 11r, 11s, 11t, 11e of the power supply side connector 11 fitted with the load side connectors 13 (13a to 13c) are inserted into the pin insertion holes 13j, 13k, 13l, 13m, respectively.

The centering protrusion 13n is configured by crossing a vertical piece and a horizontal piece in a + shape. The crossing center of the centering protrusion 13n is at the same position as the rotationally symmetric center of each pin insertion hole 13j, 13k, 13l, 13m. The centering protrusion 13n is fitted into the centering groove 11g of the power supply side connector 11 fitted with each load side connector 13 (13a to 13c). The centering protrusion 13n fitted in the centering groove 11g is centered with respect to the power supply side connector 11 in which the load side connectors 13 (13a to 13c) are fitted.

A terminal accommodating chamber 13o is formed in the internal space of the front holder 13g. As shown schematically in the explanatory views of FIGS. 3 (b) to 3 (d), the terminal accommodating chamber 13o has terminal sleeves 13r, 13s, 13t for power supply corresponding to each phase of RST (load in the claim). Two of the side terminals (corresponding to the side terminals) and the grounding terminal sleeve 13e (corresponding to the grounding terminal in the claim) are arranged.

Specifically, as shown in FIG. 3B, the terminal accommodating chamber 13o of the load side connector 13a of the RS phase connected to each connection cable 9a of the RS phase has two terminals corresponding to the two phases of the RS phase. Three terminal sleeves, a sleeve 13r and 13s and a terminal sleeve 13e for grounding, are arranged.

Further, as shown in FIG. 3C, two terminal sleeves corresponding to the two phases of the ST phase are stored in the terminal accommodating chamber 13o of the load side connector 13b of the ST phase connected to each connection cable 9a of the ST phase. Three terminal sleeves, 13s and 13t and a terminal sleeve 13e for grounding, are arranged.

Further, as shown in FIG. 3D, two terminal sleeves corresponding to the two phases of the TR phase are provided in the terminal accommodating chamber 13o of the load side connector 13c of the TR phase connected to each connection cable 9c of the TR phase. Three terminal sleeves, 13t and 13r and a terminal sleeve 13e for grounding, are arranged.

Each terminal sleeve 13r, 13s, 13t, 13e has the same structure. As shown in FIG. 2B, the openings of the terminal sleeves 13r, 13s, 13t, 13e arranged in the terminal accommodating chamber 13o are the corresponding pin insertion holes 13j, 13k, 13l on the back side of the front surface of the front holder 13g. , 13m respectively.

That is, the terminal sleeves 13r, 13s, 13t, and 13e are arranged at rotationally symmetric positions in the rotation direction Y, like the pin insertion holes 13j, 13k, 13l, and 13m that the openings face.

Therefore, as shown in FIGS. 3 (b) to 3 (d), the load-side connectors 13a to 13c of each type have a common configuration in which the arrangement of the three terminal sleeves of the terminal accommodating chamber 13o is different in the rotation direction Y. Can be configured with connectors.

Then, on the terminal sleeves 13r, 13s, 13e of the load side connector 13a of the RS phase, the feeder line 9r, 9s, and the ground wire exposed by peeling off the sheath and the insulating coating at the other end of each connection cable 9a of the RS phase. The core wires of 9e are connected respectively.

Further, on the terminal sleeves 13s, 13t, 13e of the load side connector 13b of the ST phase, the feeder lines 9s, 9t and the ground wire exposed by peeling off the sheath and the insulating coating at the other end of each connection cable 9b of the ST phase. The core wires of 9e are connected respectively.

Further, on the terminal sleeves 13t, 13r, 13e of the load side connector 13c of the TR phase, the feeder lines 9t, 9r and the ground wire exposed by peeling off the sheath and the insulating coating at the other end of each connection cable 9c of the TR phase The core wires of 9e are connected respectively.

As shown in FIG. 2B, a lock arm 13p is formed on the upper portion of the connector housing 13d of each load-side connector 13a to 13c. The lock arm 13p is locked to the lock beak 11f of the power supply side connector 11 fitted with the load side connectors 13a to 13c.

The locking structure between the lock beak 11f of the power supply side connector 11 and the lock arm 13p of each load side connector 13a to 13c may be omitted.

In the power cable unit 1 of the present embodiment configured in this way, when each power supply side connector 11 of the connector unit 10 and the load side connector 13 (13a to 13c) are fitted, each branch cable on the three-phase AC power supply side is fitted. 5 and each connection cable 9 (9a to 9c) on each lighting device 200 side are connected.

At this time, as shown in FIG. 1, a terminal sleeve 13t in which the load-side connector 13a of the RS phase connected to the connection cable 9a corresponds to the T phase is attached to the feeder lines 9r and 9s of each connection cable 9a of the RS phase. Since it does not have, only the power of the RS phase is transmitted from the power supply side connector 11 and the branch cable 5 side. Therefore, the power of the RS phase is distributed to the lighting device 200 of the group to which the connection cable 9a is connected.

Further, since the load side connector 13b of the ST phase connected to the connection cable 9b does not have the terminal sleeve 13r corresponding to the R phase in the feeder lines 9s and 9t of each connection cable 9b of the ST phase, ST. Only the phase power is transmitted from the power supply side connector 11 and the branch cable 5 side. Therefore, the ST phase power is distributed to the lighting device 200 of the group to which the connection cable 9b is connected.

Further, since the load side connector 13c of the TR phase connected to the connection cable 9c does not have the terminal sleeve 13s corresponding to the S phase in the feeder lines 9t and 9r of each connection cable 9c of the TR phase, the TR Only the phase power is transmitted from the power supply side connector 11 and the branch cable 5 side. Therefore, the TR phase power is distributed to the lighting device 200 of the group to which the connection cable 9c is connected.

As described above, the terminal sleeves 13r, 13s, 13t, and 13e of the load-side connectors 13a to 13c have the same structure. Therefore, for example, the load-side connector 13a of the RS phase can be used as the load-side connector 13b of the ST phase by changing the posture when mating to the power supply-side connector 11 by 90 ° in the rotation direction Y. Further, by changing the posture by 180 ° in the rotation direction Y, it can be used as the load side connector 13c of the TR phase.

The ST phase load side connector 13b and the TR phase load side connector 13 can also be used as other load side connectors 13a to 13c by changing the posture when mating to the power supply side connector 11 in the rotation direction Y. ..

However, when each load-side connector 13a to 13c is used as another load-side connector 13a to 13c by changing the posture when mating to the power supply-side connector 11 in the rotation direction Y, the lock beak 11f and the lock arm 13p are used. It is necessary to omit the locking structure of the above and the structure of inserting the misfit prevention key 11c into the misfit prevention keyway 13i.

By the way, in the connector unit 10 of the present embodiment, as shown in FIG. 2A, the terminal pins 11r, 11s, 11t, 11e of the terminal accommodating chamber 11d seen from the fitting surface side of the power supply side connector 11 rotate. It is arranged in a symmetrical position.

Therefore, it is not possible to distinguish which is the terminal pin 11r, 11s, 11t, 11e only by looking at the terminal accommodating chamber 11d of the power supply side connector 11.

Further, in the connector unit 10 of the present embodiment, as shown in FIG. 2B, the inside of the terminal accommodating chamber 13o covered with the front holder 13g is provided from the fitting surface side of the load side connectors 13 (13a to 13c). I can't see it. Moreover, the pin insertion holes 13j, 13k, 13l, 13m of the front holder 13g seen from the fitting surface side of the load side connectors 13 (13a to 13c) are arranged at rotationally symmetrical positions.

Therefore, just by looking at the front holder 13g from the fitting surface side of the load-side connector 13 (13a to 13c), which pin insertion holes 13j, 13k, 13l, 13m are located in which terminal sleeves 13r, 13s, 13t, 13e. I can't tell if it's supported. On the contrary, it is not possible to even distinguish which of the RS phase, ST phase and TR phase the load side connector 13 is the load side connector 13a to 13c.

Therefore, when mating the power supply side connector 11 and the load side connectors 13a to 13c, the load side connectors 13a can be seen only by looking at the power supply side connector 11 and the load side connectors 13a to 13c from the fitting surface side. It cannot be determined whether or not ~ 13c is in the correct posture with respect to the power supply side connector 11.

Therefore, in the connector unit 10 of the present embodiment, as schematically shown in the explanatory diagram of FIG. 3A, the RS phase, ST phase, and TR phase orientation alignment marks 15r, 15s, and 15t are attached to the power supply side connector 11. Was provided. Specifically, one of the four surfaces of the connector housing 11a (the left, upper, and right surfaces in FIG. 3A) has different appearances of the posture matching marks 15r, 15s. , 15t were attached respectively.

Further, in the connector unit 10 of the present embodiment, as schematically shown in the explanatory views of FIGS. 3 (b) to 3 (d), RS is attached to each load-side connector 13a to 13c of the RS phase, ST phase, and TR phase. Identification marks 17r, 17s, and 17t for the phase, ST phase, and TR phase were provided, respectively.

Specifically, as shown in FIG. 3B, the surface of the RS phase load side connector 13a provided with the RS phase alignment mark 15r of the connector housing 11a when mated with the power supply side connector 11. On the surface of the connected connector housings 13d (the surface on the right side of FIG. 3B), the RS phase identification mark 17r having the same appearance as the posture alignment mark 15r was attached.

Further, as shown in FIG. 3C, the connector housing connected to the surface of the ST phase load side connector 13b provided with the ST phase attitude alignment mark 15s of the connector housing 11a when mated with the power supply side connector 11. On the surface of 13d (the upper surface of FIG. 3B), the ST phase identification mark 17s having the same appearance as the posture alignment mark 15s was attached.

Further, as shown in FIG. 3D, the connector housing connected to the surface of the TS phase load-side connector 13c provided with the TR-phase posture alignment mark 15t of the connector housing 11a when mated with the power supply-side connector 11. On the surface of 13d (the left surface of FIG. 3C), a TR phase identification mark 17t having the same appearance as the posture alignment mark 15t was attached.

Therefore, for example, as shown in the perspective view of FIG. 4, when the load side connector 13a is fitted to the power supply side connector 11, the surface to which the identification mark 17r of the load side connector 13a is attached is the power supply side connector 11. Check if it is connected to the surface to which the posture matching mark 15r of the same appearance is attached.

Further, even when the load-side connectors 13b and 13c are fitted to the power supply-side connector 11, the surface to which the identification marks 17s and 17t of the load-side connectors 13b and 13c are attached is the posture matching mark 15s having the same appearance as the power supply-side connector 11. , Check if it is connected to the surface to which 15t is attached.

By performing this confirmation, when the load side connectors 13a to 13c are fitted to the power supply side connector 11, it is determined whether or not each load side connector 13a to 13c is in the correct posture with respect to the power supply side connector 11. Can be done.

The appearances of the posture matching marks 15r, 15s, 15t and the identification marks 17r, 17s, 17t can be different from each other depending on, for example, the color, pattern, and shape (triangle, quadrangle, etc.) of the marks.

According to the power cable unit 1 of the present embodiment, the terminal sleeves 13r, 13s (13s) of the load side connectors 13 (13a to 13c) are used properly by using the load side connectors 13a to 13c that are fitted to the power supply side connector 11. , 13t, 13t, 13r) The breakdown of the terminal pins 11r, 11s (11s, 11t, 11t, 11r) to which they are connected changes.

Therefore, the phases of the power supplied from the power supply side connector 11 to the load side connectors 13a to 13c by the load side connectors 13a to 13c fitted to the power supply side connector 11 are RS phase only, ST phase only, and TR phase only. It is divided into 3 patterns.

Therefore, even if the connection cables 9a to 9c connected to the load side connectors 13a to 13c are configured with a common cable, the phase of the three-phase AC power supply distributed to each lighting device 200 to which the connection cables 9a to 9c are connected. The breakdown of the above can be made different for each connection cable 9a to 9c.

Therefore, when the plurality of lighting devices 200 are divided into three groups and the power of some phases of the three-phase AC power supply is distributed to the lighting devices 200 of each group, the power of each phase is not biased. The phase power can be evenly distributed.

Further, even if the specifications are changed due to the replacement of the lighting device 200 and it becomes necessary to supply the power of the lighting device 200 after the replacement to a phase different from that of the lighting device 200 before the replacement, the load side connected to the connection cable 9a. It is possible to cope with the specification change of the lighting device 200 by a simple operation of changing the type of the connector 13 (13a to 13c).

Further, if the locking structure between the lock beak 11f and the lock arm 13p and the insertion structure of the misfit prevention key 11c into the misfit prevention keyway 13i are omitted, the posture of fitting to the power supply side connector 11 can be obtained. By changing the rotation direction Y, the power phases of the three-phase AC power supplies distributed to the lighting devices 200 of each group can be changed by using the load-side connector 13 having the same structure.

In the connector unit 10 of the present embodiment, the terminal pin 11e and the terminal sleeve 13e for grounding are arranged in the terminal accommodating chambers 11d and 13o of the power supply side connector 11 and the load side connector 13 (13a to 13c), respectively. However, the grounding terminal pin 11e and the terminal sleeve 13e may not be arranged in the terminal accommodating chambers 11d and 13o of the power supply side connector 11 and the load side connector 13 (13a to 13c).

The present invention is extremely useful when applied to a power cable unit or a connector unit that distributes the power of a three-phase AC power supply to a plurality of loads.

1 Power cable unit 3 Trunk cable 3e Trunk cable grounding wire 3r, 3s, 3t Trunk cable feeding line 5 Branching cable 5e Branching cable grounding wire 5r, 5s, 5t Branching cable feeding wire 7 Branching part 7a Insulation mold 9 Connection cable 9a RS phase Connection cable 9b ST phase connection cable 9c TR phase connection cable 9e Connection cable Ground wire 9r, 9s, 9t Connection cable Power supply line 10 Connector unit 11 Power supply side connector 11a Power supply side connector connector housing 11b Power supply side connector connector hood 11c Misfit prevention key 11d Power supply side connector terminal accommodation room 11e Grounding terminal pin (power supply side connector grounding terminal)
11f Lock beak 11g Centering groove 11r, 11s, 11t Terminal pin for power supply (power supply side terminal)
13 Load-side connector 13a RS-phase load-side connector 13b ST-phase load-side connector 13c TR-phase load-side connector 13d Load-side connector connector housing 13e Grounding terminal sleeve (grounding terminal for load-side connector)
13f Load side connector connector hood 13g Front holder 13h Ring space 13i Misfit prevention keyway 13j, 13k, 13l, 13m Pin insertion hole 13n Centering protrusion 13o Load side connector terminal storage chamber 13p Lock arm 13r, 13s, 13t Terminal sleeve for power supply (load side terminal)
15r RS phase attitude alignment mark 15s ST phase attitude alignment mark 15t TR phase attitude alignment mark 17r RS phase identification mark 17s ST phase identification mark 17t TR phase identification mark 100 tunnel (equipment)
200 Lighting device (load)
X connector hood depth direction (fitting direction)
Y direction of rotation

Claims (5)

And three power supply side connector line terminal is arranged in the pin receiving chamber respectively corresponding to the phases of the three-phase AC,
By fitting with the power supply side connector, it is connected to two power supply side terminals to be connected among the three power supply side terminals, and the connection is made according to the posture in the rotation direction around the fitting direction with the power supply side connector. two load-side terminals of two components of the power supply side terminal of the target is changed are arranged in a pin receiving chamber, have a load side terminal corresponding to one power source side terminal of the non-connected among the three power-side terminal With the load side connector that is not
Connector unit with. A grounding terminal is further arranged in the terminal accommodating chamber of the power supply side connector.
In the terminal accommodating chamber of the load side connector, the two load side terminals are connected to the two power supply side terminals to be connected by fitting with the power supply side connector, and the two load side terminals are connected to the power supply side connector. A grounding terminal connected to the grounding terminal of the power supply side connector by fitting is further arranged.
The connector unit according to claim 1. The connector unit according to claim 1 or 2, wherein each terminal of the terminal accommodating chamber of the power supply side connector is arranged at a rotationally symmetric position in the rotational direction. The load-side connector includes a plurality of types of load-side connectors that are fitted to the power supply-side connector in different postures.
Each type of load-side connector has an identification mark on the surface corresponding to its own type.
The power supply side connector has the posture matching mark for each type of the load side connector having the same appearance as the identification mark of each type of the load side connector at different positions on the surface thereof.
The identification mark of the load-side connector of each type is arranged on a surface connected to the surface on which the posture alignment mark of the same appearance of the power supply-side connector in which the load-side connector is fitted in a normal posture is arranged. ,
The connector unit according to claim 1, 2 or 3. A trunk cable that extends to the equipment and transmits power for each phase of the three-phase AC power supply,
A plurality of branch cables that are branched from the trunk cable and transmit power of each phase of the three-phase AC power supply, and
A plurality of connection cables connected to a plurality of loads installed in the facility and having two feeder lines corresponding to the powers of the two phases supplied to the load among the powers of each phase of the three-phase AC power supply.
A power supply side connector and a load side connector provided at the connection portion between each branch cable and each connection cable are provided.
As the power supply side connector and load side connector, the power supply side connector and load side connector of the connector unit according to claim 1, 2, 3 or 4 are used.
Power cable unit.

Images