JP6984888B2 - Wire connection structure and switchboard - Google Patents

Description

The present disclosure relates to an electric wire connection structure used when an electric wire is connected to a band-shaped conductor (for example, a copper band) arranged in a switchboard, and a switchboard.

As illustrated in Patent Document 1, the switchboard has a plurality of molded case circuit breakers and a strip-shaped conductor such as a copper band that constitutes a part of a circuit portion of the switchboard. The band-shaped conductor is used as a ground, and the electric wire is connected to the band-shaped conductor. The band-shaped conductor and the electric wire are fixed by tightening bolts while sandwiching the electric wire between the band-shaped conductor and the washer.

Japanese Unexamined Patent Publication No. 2016-1984

As shown in FIGS. 8A and 8B, a single wire or a stranded wire is used for the electric wire S connected to the strip-shaped conductor (copper strip), and a crimp terminal S1 may be provided. An electric wire S is sandwiched between the band-shaped conductor 5 and the washer 100, and is fastened and fixed by a head bolt v via a spring washer 4. In connecting the electric wire S to the conventional strip-shaped conductor, as shown in the figure, the electric wire S is sandwiched between the strip-shaped conductor 5 and the washer 100 (the washer 100'described in Patent Document 1), and the head bolt v. Tighten the screws with.

However, it is necessary to attach a large number of electric wires to one strip-shaped conductor (copper strip) in the switchboard, and it is required to improve work efficiency. In addition, two types of band-shaped conductors are often provided, and it is necessary to confirm to which band-shaped conductor one electric wire is to be connected each time and to wire correctly, and it is required to prevent wiring mistakes.

The present disclosure focuses on such a problem, and an object thereof is to make it possible to improve the efficiency of the electric wire connection work in the work of connecting the electric wire to the strip-shaped conductor, and to prevent the wiring error of the electric wire. It is to provide a preventable wire connection structure and a switchboard.

The present disclosure takes the following measures to achieve the above object.

That is, the electric wire connection structure of the present disclosure is
A band-shaped first conductor and a second conductor arranged parallel to each other, and a quick-connect terminal unit arranged on the front side of the first conductor and the second conductor are provided.
The quick-connect terminal unit is electrically connected to and inserted into a housing, one electric wire insertion hole formed on the front side of the housing, and an electric wire inserted into the one electric wire insertion hole. It has one quick-connect terminal portion that can be freely inserted and removed, and a connection terminal that is electrically connected to the quick-connect terminal portion and is exposed on the back side of the housing.
The quick-connect terminal unit is configured to be attachable to the first conductor or the second conductor in a first direction in which the connection terminal conducts to the first conductor and does not conduct to the second conductor. The connection terminal is configured to be attachable to the first conductor or the second conductor in a second direction in which the connection terminal conducts to the second conductor and does not conduct to the first conductor.

Since the quick-connect terminal unit has only one wire insertion hole and one quick-connect terminal portion corresponding to the wire insertion hole, compared to a structure in which one quick-connection terminal unit has a plurality of wire insertion holes and quick-connection terminal portions. The electric wire can be easily wired by the quick connection terminal without making a mistake. Nevertheless, the quick-connect terminal unit is configured so that it can be arranged in both the first orientation for connecting the electric wire to the first conductor and the second orientation for connecting the electric wire to the second conductor. Therefore, the quick connection terminal unit can be arranged in the direction according to the connection destination of the electric wire, and it is not necessary to prepare a different quick connection terminal unit for each connection destination of the electric wire, and it is possible to standardize the parts and reduce the cost. Become.
Therefore, it is possible to improve the efficiency of the electric wire connection work, and further, it is possible to provide the electric wire connection structure capable of preventing the electric wire wiring error.

Perspective view showing the switchboard of the present disclosure Front view showing the first conductor, the second conductor, the circuit breaker, and the quick-connect terminal unit constituting the switchboard of the present disclosure. Cross-sectional view showing the first conductor, the second conductor, the circuit breaker and the quick-connect terminal unit. Front view, side view, and rear view showing the quick connection terminal unit constituting the electric wire connection structure. Front view and side view showing the quick-connect terminal unit mounted in the first orientation. Front view and side view showing the quick-connect terminal unit mounted in the second orientation. The figure which shows the deformation example of the electric wire connection structure The figure which shows the deformation example of the electric wire connection structure Explanatory drawing about electric wire connection using a conventional washer. (A) Plan view. (B) Side view.

An embodiment of the present disclosure will be described with reference to the drawings.

As shown in FIGS. 2 and 3, the switchboard has a plurality of circuit breakers 1 and a strip-shaped conductor 5 such as a copper strip that constitutes a part of a circuit portion of the switchboard. The electric wire S drawn from the outside of the switchboard is electrically connected to the circuit breaker 1 or the strip-shaped conductor 5. In order to facilitate the work of connecting the electric wire S to the circuit breaker 1, the circuit breaker 1 is provided with a quick connection terminal portion. Further, in order to facilitate the work of electrically connecting the strip-shaped conductor 5 and the electric wire S, a quick connection terminal unit 6 is provided.

Since the wiring of the electric wires is appropriately changed according to the specifications, the electric wires may not be wired at the time of shipment of the switchboard, and FIG. 2 is a front view showing the state of the wiring.

A plurality of strip-shaped conductors 5 are provided as grounds and are arranged in parallel with each other. In this embodiment, two conductors are arranged, one is provided as a first conductor 5a for ELCB (Earth Leakage Circuit Breaker) and the other is provided as a second conductor 5b for ED (class D grounding). It is provided, but is not limited to this. The longitudinal direction of the strip-shaped conductor 5 is arranged along the vertical direction (Y1, Y2) with respect to the housing 2. FIG. 2 shows the vertical direction, and FIG. 3 shows the method perpendicular to the paper surface. The first conductor 5a and the second conductor 5b have the same position (height) in the depth direction when the front side X1 and the back side X2 are viewed.

As shown in FIGS. 3, 4, 5A and 5B, the quick-connect terminal unit 6 is arranged on the front side X1 of the first conductor 5a and the second conductor 5b. The quick-connect terminal unit 6 can be electrically connected to the housing 60, one electric wire insertion hole 63 formed in the front side X1 of the housing 60, and an electric wire inserted into one electric wire insertion hole 63. One quick-connect terminal 62 that allows the inserted electric wire to be freely inserted and removed, and a connection terminal 61 that is electrically connected to the quick-connect terminal 62 and is exposed on the back side X2 of the housing 60. Have. The quick connection terminal portion 62 is for inputting a wire insertion hole 63, a pinching structure (not shown) for sandwiching the wire provided at the back of the wire insertion hole 63, and a release operation for separating the wire from the pinching structure. It has an operation unit 64 and. As shown by the broken line in the side view of FIG. 4, the base end portion of the quick connection terminal portion 62 is electrically connected to the connection terminal 61 (indicated by the diagonal line in FIG. 4). The housing 60 of the quick-connect terminal unit 6 is made of an insulating member (for example, resin), but the material can be arbitrarily changed as long as an appropriate electrical connection (conduction) can be secured. The front side X1 of the housing 60 is provided with a strip gauge 65 indicating a dimension for stripping the coating of the electric wire S, and a display 66 indicating a suitable electric wire diameter.

As shown in FIG. 5A, the quick-connect terminal unit 6 connects to the first conductor 5a or the second conductor 5b in the first direction p1 in which the connection terminal 61 conducts to the first conductor 5a and does not conduct to the second conductor 5b. It is configured to be mountable. Further, as shown in FIG. 5B, in the quick-connect terminal unit 6, the connection terminal 61 conducts the second conductor 5b and does not conduct to the first conductor 5a in the first conductor 5a or the second conductor in the second direction p2. It is configured so that it can be attached to 5b. In the embodiment shown in FIGS. 5A and 5B, the quick-connecting terminal unit 6 is attached to the first conductor 5a in the first orientation p1, and the quick-connecting terminal unit 6 is attached to the second conductor 5b in the second orientation p2. However, it is not limited to this. For example, by changing the location of the connection terminal 61 exposed on the back side X2 of the housing 60, the quick-connect terminal unit 6 is attached to the second conductor 5b in the first orientation p1 and the second orientation p2. It is also possible to configure the quick-connect terminal unit 6 to be attached to the first conductor 5a.

As shown in FIGS. 5A and 5B, the electric wire insertion hole 63 is arranged at a position eccentric from the center C1 of the housing 60 in front view. According to such an arrangement of the electric wire insertion hole 63, the position of the electric wire insertion hole 63 becomes either of two predetermined positions (right side or left side) as shown in FIG. 2 depending on the direction of the quick connection terminal unit 6. It is possible to grasp at a glance which of the first conductor 5a and the second conductor 5b is conducting, and it is possible to improve workability.

As shown in FIG. 5A, if the electric wire S is inserted into the electric wire insertion hole 63 of the quick-connecting terminal unit 6 in the first orientation p1, the electric wire S becomes the first via the quick-connecting terminal portion 62 and the connection terminal 61. It is electrically connected to the 1 conductor 5a, and the electric wire S is not conducted with the second conductor 5b and is in an insulated state (see path L). On the other hand, as shown in FIG. 5B, if the electric wire S is inserted into the electric wire insertion hole 63 of the quick connecting terminal unit 6 in the second direction p2, the electric wire S is inserted through the quick connecting terminal portion 62 and the connection terminal 61. Is electrically connected to the second conductor 5b, and the electric wire S is not conducted with the first conductor 5a and is in an insulated state (see path L).

According to such a structure, one quick-connecting terminal unit 6 can be used, and connection to two types of strip-shaped conductors 5 (earth) can be selected only by changing the mounting direction of the quick-connecting terminal unit 6. Moreover, since the quick connection terminal portion 62 that is connected only by inserting the electric wire S is adopted, the connection work becomes easy. Nevertheless, since only one electric wire insertion hole 63 is formed in one quick connection terminal unit 6, there is no mistake as compared with the case where a plurality of electric wire insertion holes 63 are present.

Next, a method of fixing the quick-connect terminal unit 6 will be described.

As shown in FIGS. 4, 5A and 5B, thread grooves 5s are formed in the first conductor 5a and the second conductor 5b. The housing 60 of the quick-connect terminal unit 6 is provided with a bolt hole 67 on one side SD1 when viewed from the front, and a positioning protrusion 68 is formed on the other side SD2 and the back side X2. The quick-connect terminal unit 6 is fastened to the first conductor 5a or the second conductor 5b with a headed bolt 71 inserted into the screw groove 5s. In the example of FIG. 5A, the quick-connect terminal unit 6 is fastened to the first conductor 5a, and in the example of FIG. 5B, the quick-connect terminal unit 6 is fastened to the second conductor 5b. With the screw groove 5s and the headed bolt 71 inserted into the screw groove 5s, the fixing work becomes easier as compared with the bolt / nut structure.

In the example of FIG. 5A, the positioning protrusion 68 is a screw of the other conductor (second conductor 5b) of the first conductor 5a and the second conductor 5b, which is not the conductor (first conductor 5a) fastened by the headed bolt 71. Fits in the groove 5s. Further, in the example of FIG. 5B, the positioning protrusion 68 is the other conductor (first conductor 5a) of the first conductor 5a and the second conductor 5b, which is not the conductor (second conductor 5b) fastened by the headed bolt 71. It fits into the screw groove 5s of. In order to realize this state, the positional relationship between the screw groove 5s of the first conductor 5a, the screw groove 5s of the second conductor 5b, the bolt hole 67, and the positioning protrusion 68 is defined. For example, the distance between the screw grooves of the first conductor 5a and the second conductor 5b and the distance between the bolt hole 67 and the positioning protrusion 68 may be the same or substantially the same.

Further, the connection terminal 61 comes into contact with the conductor of the first conductor 5a or the second conductor 5b to which the headed bolt 71 is fastened. In the example of FIG. 5A, the connection terminal 61 comes into contact with the conductor (first conductor 5a) to which the headed bolt 71 is fastened. In the example of FIG. 5B, the connection terminal 61 comes into contact with the conductor (second conductor 5b) to which the headed bolt 71 is fastened. In this way, if the connection terminal 61 is brought into contact with the conductor to which the headed bolt 71 is fastened, the connecting terminal 61 is surely brought into contact with the conductor by fastening the headed bolt 71, so that electrical connection can be established. You can make sure. Of course, the connection terminal 61 may be configured to come into contact with the other conductor that is not the conductor to which the head bolt 71 is fastened.

In some cases, it may be required to easily determine which part of the strip-shaped conductor 5 the electric wire as the ground wire corresponding to which circuit breaker 1 is attached. In that case, as shown in FIG. 2, a plurality of circuit breakers 1 and quick-connect terminal units 6 are arranged along the longitudinal direction of the first conductor 5a and the second conductor 5b, and a plurality of circuit breakers 1 and a plurality of quick-connect terminal units 6 are arranged along the longitudinal direction. It is preferable that the arrangement interval D1 of the circuit breaker 1 and the arrangement interval D2 of the plurality of quick-connect terminal units 6 are the same. In the present embodiment, the width of the circuit breaker 1 in front view and the width of the quick-connect terminal unit 6 in front view are set to the same dimension (25 mm). As described above, if the arrangement intervals are the same, the quick connection terminal unit 6 corresponding to the circuit breaker 1 becomes clear at a glance. Of course, it is preferable that the circuit breaker 1 and the quick-connect terminal unit 6 have the same dimensions from the viewpoint of ease of arrangement work and visibility, but they do not necessarily have the same dimensions as long as the arrangement intervals are equal.

Further, if the circuit breaker 1 and the quick connection terminal unit 6 are formed to have corresponding dimensions and are arranged adjacent to each other, the circuit breaker 1 as a breaker can be used as an earth unit when changing to the circuit breaker 1 as an earth leakage breaker. Wiring can be completed while the correspondence relationship is clear only by changing the direction of the quick connection terminal unit 6.

[Modification example]
The electric wire connection structure is not limited to FIGS. 2, 3, 4, 5A, and 5B. For example, it may be as shown in FIG. In the electric wire connection structure shown in FIG. 6, two pairs of claws 170 are provided in the housing 60 of the quick-connect terminal unit 106 without using the bolt 71. The claw 170 is made of resin and has flexibility, and the quick-connect terminal unit 106 is fixed to the first conductor 5a and the second conductor 5b by inserting the claw 170 into the band-shaped conductor 5. It is the same that the quick-connect terminal unit 106 can be mounted in the first orientation and the second orientation. The first conductor 5a and the second conductor 5b have the same position (height position) in the depth direction when the front side X1 and the back side X2 are viewed.

Further, the electric wire connection structure may be as shown in FIG. In the example of FIG. 7, the first conductor 5a and the second conductor 5b have different positions (height positions) in the depth direction when the front side X1 and the back side X2 are viewed. The electric wire connection structure shown in FIG. 7 uses a bolt 71, but since the heights of the first conductor 5a and the second conductor 5b are different, the clog member 270 can be replaced with the housing 60 of the quick-connect terminal unit 206. .. The clog member 270 has a positioning protrusion 68. The clog member 270 and the housing 60 adopt a fitting structure with slits, but the present invention is not limited to this.

As shown in FIG. 1, the switchboard has a plurality of circuit breakers 1 having an operation switch 10, a housing 2 having an opening 20 for accommodating the plurality of circuit breakers 1 and facing the front side X1, and an opening of the housing 2. It has a door 3 capable of closing 20 and a door 3. As shown in FIGS. 1 and 3, the operation switch 10 of the circuit breaker 1 can be switched between the on state and the off state in order to open and close the contact, and the front surface of the circuit breaker 1 is attached to the housing 2. It protrudes toward the side X1. As shown in FIGS. 1 and 3, the housing 2 has a box shape having an opening 20, and has a top plate portion 21, a back plate portion 22, a side plate portion 23, and a bottom plate portion 24, and is an electric device including a circuit breaker 1. It forms a space to store. As shown in FIG. 3, each electric device (including the circuit breaker 1) constituting the switchboard is attached to a middle plate (not shown), and the middle plate is attached to a back plate portion (not shown) of the housing 2. As shown in FIGS. 1 and 3, a door 3 is attached to a side plate portion 23 so as to be openable and closable on the front side X1 of the electric device including the circuit breaker 1. A viewing window 30 corresponding to the circuit breaker 1 is formed in the door 3, and the operation switch 10 of the circuit breaker 1 is opened (exposed) from the viewing window 30 to the front side X1. The door 3 is provided to shield the conductive portion of the electric device inside to ensure safety and improve the appearance. In the present embodiment, the door 3 is a double door, but is not limited to this. For example, it may be a single door.

As described above, the electric wire connection structure of the present embodiment is arranged on the strip-shaped first conductor 5a and the second conductor 5b arranged in parallel with each other and on the front side X1 of the first conductor 5a and the second conductor 5b. The quick-connect terminal units 6, 106, 206 are provided. The quick-connect terminal units 6, 106, 206 are electrically connected to the housing 60, one electric wire insertion hole 63 formed in the front side X1 of the housing 60, and the electric wire S inserted into one electric wire insertion hole 63. For connection, one quick-connect terminal portion 62 that is connected to and freely inserted and removed the inserted electric wire S, and a connection that is electrically connected to the quick-connect terminal portion 62 and is exposed to the back side X2 of the housing 60. It has a terminal 61 and. The quick-connect terminal units 6, 106, 206 can be attached to the first conductor 5a or the second conductor 5b in the first direction p1 in which the connection terminal 61 conducts to the first conductor 5a and does not conduct to the second conductor 5b. It is configured so that the connection terminal 61 can be attached to the first conductor 5a or the second conductor 5b in a second direction p2 that conducts to the second conductor 5b and does not conduct to the first conductor 5a.

As described above, since the quick-connecting terminal units 6, 106, 206 have only one electric wire insertion hole 63 and one quick-connecting terminal portion 62 corresponding thereto, the electric wires are connected to one quick-connecting terminal unit 6, 106, 206. Compared with a structure in which a plurality of insertion holes 63 and quick connection terminal portions 62 are present, the electric wire S can be easily wired by the quick connection terminal without making a mistake. Nevertheless, the quick-connect terminal units 6, 106, 206 have a first orientation p1 for connecting the electric wire S to the first conductor 5a and a second orientation p2 for connecting the electric wire S to the second conductor 5b. Since it is configured so that it can be arranged in both directions, the quick-connect terminal units 6, 106, 206 can be arranged in the direction according to the connection destination of the electric wire S, and different quick-connection terminal units can be arranged for each connection destination of the electric wire S. It is not necessary to prepare it, and it is possible to reduce costs by standardizing parts.
Therefore, it is possible to improve the efficiency of the connection work of the electric wire S, and further, it is possible to provide the electric wire connection structure capable of preventing the wiring error of the electric wire S.

In the present embodiment, the first conductor 5a and the second conductor 5b are formed with threaded grooves 5s, and the quick-connecting terminal units 6, 206 are the first conductors with headed bolts 71 inserted into the threaded grooves 5s. It is fastened to 5a or the second conductor 5b.

With this configuration, the quick-connect terminal unit 6 can be fastened by inserting the headed bolt 71 into the screw groove 5s of the first conductor 5a or the second conductor 5b, so that the fixing work is performed as compared with the bolt / nut structure. Becomes easier.

In the present embodiment, the connection terminal 61 is in contact with the conductor of the first conductor 5a or the second conductor 5b to which the headed bolt 71 is fastened.

In this way, if the connection terminal 61 is brought into contact with the conductor to which the headed bolt 71 is fastened, the connecting terminal 61 is surely brought into contact with the conductor by fastening the headed bolt 71, so that electrical connection can be established. You can make sure.

In the present embodiment, the quick-connect terminal unit 6 has a positioning protrusion 68 that fits into the thread groove 5s of the other conductor of the first conductor 5a and the second conductor 5b, which is not the conductor fastened by the headed bolt 71.

According to this configuration, since the quick-connect terminal unit 6 is fixed at two points of the positioning protrusion 68 and the headed bolt 71, the fixing strength can be increased and only one point of the headed bolt 71 is fastened. Since the fixing work is completed with, it is possible to improve workability.

In the present embodiment, the electric wire insertion hole 63 is arranged at a position eccentric from the center of the housing 60 in front view.

According to such an arrangement of the electric wire insertion hole 63, the position of the electric wire insertion hole 63 becomes one of the two predetermined positions as shown in FIG. 2 depending on the orientation of the quick-connect terminal unit 6, so that the first conductor 5a It is possible to grasp at a glance which of the second conductor 5b and the second conductor 5b is conducting, and it is possible to improve workability.

The switchboard of the present embodiment has a plurality of circuit breakers 1 and the electric wire connection structure. With such a configuration, it is possible to improve the efficiency of the electric wire connection work, and further, it is possible to provide a switchboard capable of preventing an electric wire wiring error.

In the present embodiment, a plurality of circuit breakers 1 and quick-connect terminal units 6 are arranged along the longitudinal direction of the first conductor 5a and the second conductor 5b, and the circuit breakers 1 are arranged at intervals D1 and a plurality of circuit breakers 1. The arrangement interval D2 of the quick connection terminal unit 6 is the same.

As described above, if the arrangement intervals are the same, the quick connection terminal unit 6 corresponding to the circuit breaker 1 becomes clear at a glance.

The present disclosure is not limited to the above-described embodiment, and various improvements and changes can be made without departing from the spirit of the present disclosure.

For example, when looking only at the wire connection structure, the above description is "front side" and "rear side" for convenience of explanation, but these meanings are limited to "front side" and "rear side" in the switchboard. It does not mean that it will be done. In the wire connection structure, the quick connection terminal unit side means the "front side" and the strip-shaped conductor side means the "back side". Therefore, it is possible to arrange the quick-connecting terminal unit above the switchboard and arrange the band-shaped conductor below the quick-connecting terminal unit. In this case, the upper side of the wire connection structure is the "front side" and the lower side is the "back side".

5a 1st conductor 5b 2nd conductor 5s Thread groove 6,106,206 Fast connection terminal unit 60 Housing 61 Connection terminal 62 Fast connection terminal 63 Wire insertion hole 68 Positioning protrusion 71 Headed bolt p1 1st direction p2 1st 2 orientation

Claims (7)

A band-shaped first conductor and a second conductor arranged parallel to each other, and a quick-connect terminal unit arranged on the front side of the first conductor and the second conductor are provided.
The quick-connect terminal unit is electrically connected to and inserted into a housing, one electric wire insertion hole formed on the front side of the housing, and an electric wire inserted into the one electric wire insertion hole. It has one quick-connect terminal portion that can be freely inserted and removed, and a connection terminal that is electrically connected to the quick-connect terminal portion and is exposed on the back side of the housing.
The speed imaging terminal unit, the connecting terminal is configured to be mounted to said first guide member in a first direction which is not conductive to conducting to and the second conductor to the first conductor and the connection terminal There has been configured to be capable of attachment to the prior SL second conductor in a second direction which is not electrically connected to the second conductive to the conductor and the first conductor, the electric wire connection structure. Threaded grooves are formed in the first conductor and the second conductor.
The electric wire connection structure according to claim 1 or 2, wherein the quick-connect terminal unit is fastened to the first conductor or the second conductor with a headed bolt inserted into the screw groove. The electric wire connection structure according to claim 2, wherein the connection terminal is in contact with the conductor to which the headed bolt is fastened among the first conductor or the second conductor. The quick-connect terminal unit according to claim 2 or 3, wherein the quick-connect terminal unit has a positioning projection that fits into the thread groove of the other conductor of the first conductor and the second conductor, which is not the conductor fastened by the headed bolt. Wire connection structure. The electric wire connection structure according to any one of claims 1 to 4, wherein the electric wire insertion hole is arranged at a position eccentric from the center of the housing when viewed from the front. A switchboard having a plurality of circuit breakers and the electric wire connection structure according to any one of claims 1 to 5. A plurality of the circuit breaker and the quick-connect terminal unit are arranged along the longitudinal direction of the first conductor and the second conductor.
The switchboard according to claim 6, wherein the arrangement interval of the plurality of circuit breakers is the same as the arrangement interval of the plurality of quick connection terminal units.

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