JP3064073B2 - Wiring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring device used for indoor wiring of an apartment or the like, and particularly suitable for forming a three-way switch circuit.

[0002]

2. Description of the Related Art In a conventional indoor wiring of a condominium or the like,
A so-called joint box has been used as a wiring device for branching the power cable.
This conventional joint box has a structure in which a connection portion for connecting a branch cable connected to an outlet or the like in a quick connection manner is provided at each branch end where a plurality of power cables are branched. In other words, when the sheath of the branch cable is removed and the core wire is inserted into the wire insertion port provided in the connection portion,
Electrical connection is made by elastically holding the core wire between the terminal plate provided inside and the locking spring, and the branch cable is prevented from coming off by the locking force of the locking spring and is also mechanically held. It is supposed to be.

[0003]

However, this type of joint box having a quick-coupling structure has a problem in that wiring cannot be easily performed unless a person having specialized knowledge is provided. In addition, this type of conventional joint box only performs branching and feeding of the power supply line, and thus cannot be used when forming a three-way switch circuit.

[0004] The present invention has been made in view of the above points, and it is an object of the present invention to easily perform wiring even without a person having specialized knowledge and to form a three-way switch circuit. An object of the present invention is to provide a wiring device that can be used in such a case.

[0005]

According to the present invention, in order to attain the above object, at least a plurality of connection portions for connecting at least a load, a plurality of branch cables connected to two switches, and a power supply cable by a connector system are provided. It has a built-in circuit part that forms a three-way switch circuit between the load and the two switches between the connection parts, and supports connectors and connection parts that connect cables from loads, switches, and power supplies. An erroneous connection prevention structure is provided to enable connection only to those that do.

[0006] The erroneous connection prevention structure can be formed, for example, by a concave / convex fitting portion which allows only a connector and a corresponding portion to be fitted.

[0007]

According to the present invention, the wiring work can be easily performed by connecting the branch cable and the power supply cable connected to the load and the switch by the connector method as described above, and the cable from the load, the switch and the power supply can be easily connected. By providing an erroneous connection prevention structure that allows connection only to a connector corresponding to a connector to be connected and a connection portion, erroneous connection is prevented from being performed, thereby easily and even without a person having specialized knowledge and In the case where a three-way switch circuit is formed, the wiring can be performed accurately, and a circuit portion that forms a three-way switch circuit between the load and the two switches is built in between the connection portions. It can be used.

[0008]

1 to 15 show an embodiment of the present invention.
As shown in FIG. 15, the wiring device 1 of the present embodiment branches and supplies power to a load 2 such as a lighting device and wiring devices 3 and 4 such as a switch and an outlet. , For each indoor zone).

In the case of the present embodiment, the wiring device 1 is formed into blocks according to the application. For example, in the present embodiment, a block 1a for sending wiring used when a plurality of power supply lines are branched, and a block 1b for a switch circuit used when the load 7 is turned on and off by switching one switch 6, And a block 1c for a three-way switch circuit used when the load 7 is turned on and off by switching operation of two switches 6.

Each of the blocks 1a to 1c is provided at one end with a connecting portion 10a for detachably connecting a harness connector 7 attached to the power cable 5 and at the other end with a feed wiring cable (not shown). A connecting portion 10b for detachably connecting the harness plug attached to the connector is provided (for example, see FIG. 1). However, each of the blocks 1a to 1
c, as described later, each connecting portion 1
0a and 10b are used to connect to each other.
Then, from both sides of each of the blocks 1a to 1c, a load 2
Connecting part 10 for connecting a harness plug 8 attached to a branch cable 6 for making a connection between the wiring cables 3 and 4
c is provided.

First, the structure of the block 1c is shown in FIGS.
It will be described based on. Housing 1 of this block 1c
1 is composed of a body 11a made of synthetic resin and a cover 11b as shown in FIG. The fixing of the body 11a and the cover 11b is performed by crimping the fitting 92 through the fitting holes 24a and 24b and integrally combined. The connecting portion 10a formed at one end of the housing 11 is
It has substantially the same structure as a harness plug (harness plug 8 in FIG. 15) for connecting cables, and FIG.
As shown in FIG. 1, the power supply cable 5 includes an insertion port 12 into which the harness connector 7 is fitted, and a lock piece 13 for preventing the harness connector 7 inserted into the insertion port 12 from coming off.

The lock piece 13 is, as shown in FIG.
Mounting recess 18 recessed at one end of the upper surface of cover 11b
The fixing piece 13c is fixedly attached to the opening 1 and the claw 13a formed at the tip thereof has an opening 1 formed at one end of the mounting concave portion 18.
It is structured to protrude into the insertion opening 12 from 8a. Now, assuming that the harness connector 7 is fitted to the connection portion 10a, the claw 13a of the lock piece 13 is locked in the lateral groove formed in the harness connector 7, and the harness connector 7 is prevented from coming off. An operating portion 13b is formed on the other end of the lock piece 13. When the operating portion 13b is pushed into the mounting recess 18, the engagement state of the claw 13a with the lateral groove of the harness connector 7 is released. The harness connector 7 can be removed.

A connecting portion 10b formed at the other end of the housing 11 is a harness plug (the same as 8 in FIG. 15) attached to a cable for feed wiring, so that a description is given with reference numeral 8. ) Is formed in a convex shape to be fitted into the insertion opening, and is provided on the upper surface with a lateral groove 14 a which is locked by a lock piece (corresponding to the lock piece 13) of the harness plug 8 and a predetermined harness plug 8. And two vertical grooves 14b that can be connected to each other. Here, the two vertical grooves 14b function as an erroneous connection prevention structure for the connecting portion 10b.

The connecting portion 10 is connected to the other end of the cover 11b.
b to form ears 16 extending laterally from the body 11
A receiving part 15 for receiving the ear part 16 is formed at one end of the part a so as to extend laterally from the connecting part 10a. For example, when the blocks 1c are connected to each other, as shown in FIG. 6, the connecting portion 10b of one block 1c is fitted to the connecting portion 10a of the other block 1c. At this time, the ear 16 is placed on the receiving portion 15, and the screws 90 and the nuts 91 are screwed through the fixing holes 17a and 17b formed in the receiving portion 15 and the ear 16, respectively. Are connected so that they do not come off. Although not shown in FIG. 2, the screw 90 is screwed by engaging a screw 93 (see FIG. 7 or FIG. 11). Although the above description has been made for the case of the blocks 1c, the blocks 1a to 1c can be arbitrarily connected, for example, as shown in FIGS.

With such a structure in which the screws 90 and the nuts 91 are screwed together to connect the blocks 1c to each other, the connecting portions 10a and 10b can be reliably connected.
Even if a clearance is provided between the insertion port 12a and the connecting portion 10b, the advantage that the connection state between the blade 21 and the blade receiving spring 22 described later is stabilized can be obtained. Also, since the connection strength of the blocks 1a to 1c is increased, the power cable 5
Also, it is possible to eliminate the possibility that the connecting portions 10a and 10b are damaged by the pulling force of the branch cable 6.

[0016] The above from one aspect of the block 1c, the branch cable harness plug 8 attached to the branch cable 6 connected to the switch 3 has two connecting portion 10c ₁ that is detachably attached, which is connected to a load 2 harness plug 8 attached to 6 is formed with one connection portion 10c ₂ removably attached. These connecting portions 10c ₁ and 10c ₂ are formed in the same shape as the connecting portion 10b described above.

[0017] However, not form the equivalent of a vertical groove 14b of the connection preventing structure erroneous in the connecting portion 10c _1, the connecting portion 10c to the ₂ forms only longitudinal groove 14b Paragraph, these Individual harness plugs 8 are connected to the connection portions 10c ₁ and 10c ₂ and the connection portion 10b. That is, ridges that fit into the vertical grooves 14b are formed inside the insertion openings of the harness plugs 8 corresponding to the respective harness plugs. Parts 10c ₁ , 10
It is prevented from being connected to c ₂ and 10b to eliminate the possibility of erroneous connection.

Since the block 1c is for a three-way switch circuit, the connecting portions 10a and 10b are provided inside the body 11a.
A circuit portion for forming a three-way switch circuit is provided between 10c ₁ and 10c ₂ , and this circuit portion is formed by a plurality of conductive plates 20. Here, in the case of the present embodiment, since the power cable 5 has the grounding electrode, a total of six conductive plates 20 are provided.
It is formed with three-way switch circuit using a 20 ₁ to 20 _6.
The circuit section of the block 1c is formed as shown on the upper surface of the housing 11 (internal circuit diagram) shown in FIG. The connection portions _{10a, 10b, 10c 1, 10c} 2
Is also displayed to clarify the connection target.

In the insertion opening 12 of the connecting portion 10a, three blades 21 _{1 to} 21 ₃ are attached, and the blade 2 for the ground electrode is provided.
1 ₁ by increasing the amount of protrusion, upon connection to other plug pins 21 _2, 21 ₂ of the harness connector 7, is first connected,
And it is designed to be removed at the end so as to secure safety at the time of attachment and detachment. Each connection part 10b, 10c ₁ , 10
internal c ₂ are are separated into respective three storage compartments by partition walls. Here, the connecting portions 10b, the blade receiving spring 22 _{1-22 9} for accommodating compartment 10c ₁ are respectively housed, connecting part 1
The blade receiving springs 22 ₁₀ and 22 ₁₁ are stored in the two storage compartments 0c ₂ , respectively.

Each of the blade receiving springs 22₁~ 22₁₁And plug blade 2
1₁~ 21_ThreeIs the conductive plate 20₁~ 20 ₆Connected by
You. Here, in the case of this embodiment, the blade receiving spring 22₁~ 22
₁₁Are the conductive plates 20, respectively.₁~ 20₆Is formed integrally with
Blade 21₁~ 21_ThreeIs the conductive plate 20₁~ 20_ThreeFirmly
It is fixed and attached. However, in some cases, the blade 21
₁~ 21_ThreeTo the conductive plate 20₁~ 20_ThreeWill be formed integrally with
You may do it.

Each blade receiving spring 22₁~ 22₁₁And the blade 21₁
~ 21_ThreeConductive plate 20₁~ 20₆The connection status by
This will be described specifically. Each blade 21₁~ 21_ThreeIs the connection
Blade receiving springs 22 arranged opposite to each other in 10b₁~ 22_Three
And conductive plate 20₁~ 20_ThreeAre connected to each other. In addition, each
Conductive plate 20_Two, 20_ThreeBody 11a and hippopotamus
11b is fixed to the ceiling or the like.
It is curved so as to avoid this part. So
And the conductive plate 20_TwoHas a connection 10c_TwoBlade receiving spring 22
_TenAre integrally connected, and the conductive plate 20_ThreeHas a blade receiving spring 10c
₁Blade receiving spring 22₆Are connected integrally. Also the blade
Receiving spring 22_Four, 22₇Between the conductive plates 20 _FourConnected by
Blade receiving spring 22_Five, 22₈Between the conductive plates 20_Five, Blade receiving spring
22₉, 22₁₁Between the conductive plates 20₆Are connected by

[0022] The respective conductive plates 20 ₁ to 20 ₆ bodies 11
By arranging the block 1a as follows, the outer shape of the block 1c is prevented from increasing. Specifically, as shown in FIG. 4, the conductive plate 20 _1, 20 ₅ and laid most lower side, the upper conductive plate 20 ₂ is disposed, and further arranged conductive plates 20 ₃ thereon , Conductive plate 2 at the top
0 ₄ and 20 ₆ are arranged. In FIG. 4, the portions located in each layer are indicated by diagonal lines, and the portions with the same diagonal lines are arranged in the same layer. With this three-dimensionally arranged in each conductive plate 20 ₁ to 20 ₆ 4 layers, it is possible to reduce the thickness and the area occupied by the block 1c.

[0023] Incidentally, the respective conductive plates 20 ₁ to 20 ₆ sterically arranged as described above, in order to hold the spacing constant state, a plurality of mounting ribs 23 ₁ to 23 as shown in FIG. 2 ₁₁
Are formed on the body 11a, and mounting ribs (not shown) corresponding to the respective mounting ribs 23 are formed on the cover 11b side so that the conductive plate 20 is disposed inside in a fixed state. The vertical spacing between the conductive plates 20 arranged in each layer is 3.2 mm, a sufficient insulation distance is secured, and the thickness of the block 1c is reduced to 20 mm.

Incidentally, as described above, a plurality of types of conductive plates 2 are provided.
0₁~ 20₆If you need, the cost will be high
There's a problem. Therefore, as a method to improve this point,
Method may be adopted. The conductive plate 20_Two, 20_ThreeWhen
Is the conductive plate 20_Two, 20_ThreeConnection part 1
0a and 10b are connected to each other as shown in FIG.
It is possible to have a common structure as shown in FIG.
Therefore, different portions, that is, the conductive plate 20 _TwoBlade holder
Spring 22_TenAnd the conductive plate 20_ThreeOf the blade
Yeah 22₆Using a mold with both parts connected to
The conductive plate 20_Two, 20_ThreeAre manufactured in common, each conductive
Board 20₁, 20_ThreeTo cut unnecessary parts by post-processing
In other words, the conductive plate 20_Two, 20_ThreeForming mold
Cost can be reduced.

As shown in FIGS. 5 (c) and 5 (d),
Conductive plate 20_Four, 20_FiveAnd the blade 21 _Two, 21_ThreeIs the same shape
By changing the mounting direction for each,
Can be used. As common as possible
If the conductive plate 20 is formed using a mold, the cost of the mold can be reduced.
In addition, cost can be reduced. And the number of parts is also reduced
Thus, the loss on the part supply side can be reduced.

Next, the blocks 1b and 1a will be briefly described. The following description is based on the blocks 1b and 1a.
This is performed only for the characteristic features of First, block 1b
As shown in FIGS. 7 to 9, while projecting the three connecting portions 10c ₁ from one side, Yes and projecting the three connection portions 10c ₂ from the other side, the internal circuit is arranged in each symmetrically A switch circuit for connecting the load 2 and the switch 3 connected to the connecting portions 10c ₁ and 10c ₂ connected in series between the power supplies is
It has a configuration with a set.

The conductive plate 20 ₁ ′-
20 ₃ ′ has a structure in which the corresponding blade 21 and the blade receiving spring 22 of the connecting portions 10 a and 10 b are connected substantially linearly, and is connected to the conductive plate 20 ₃ ′ on the side of the connecting portion 10 c ₂ . The blade receiving springs 22 ₂₆ , 22 ₂₈ , 22 ₃₀ are integrally connected, and the blade receiving springs 22 ₂₁ , 22 on the connection portion 10c ₁ side are connected to the conductive plate 20 ₂ ′.
It is integrally connected to the 2 _23, 22 _25. Then, connecting the blade receiving springs 22 _20, 22 ₃₁ with a conductive plate 20 _20, the blade receiving springs ₂₂ 22, 22 ₂₉ conductive plate 20 ₂₁ between the further blade receiving springs 2
It is connected between the two _24, 22 ₂₇ with a conductive plate 20 _22.

Here, in the case of the block 1b as well,
As shown in FIG.₂₀~ 20 _{twenty two}Placed on the bottom layer
And a conductive plate 20_Two’And at the top
Conductive plate 20₁’, 20_Three’In a three-dimensional three-layer structure
So that the overall shape is thin and compact.
You. The block 1a is, as shown in FIGS.
Connection part 10c for connecting outlet 4 to the side_ThreeThree
And each connecting portion 10c_ThreeHusband in three sections of
Each blade receiving spring 22 is arranged, and each connection portion 10c_Threeblade of
The receiving spring 22 is disposed between the connecting portions 10a and 10b, respectively.
Conductive plate 20₁"~ 20_ThreeConnected to the above
Board 20₁"~ 20_Three"In the same manner as the block 1b
Arranged in a three-layer structure so that the overall shape is thin and small
It is.

By the way, in the block 1a, the same conductive plates 20 ₁ ″ and 20 ₃ ″ can be used if they are turned upside down. The conductive plate 20 ₂ ′ of the block 1 b can be connected to the conductive plates 20 ₁ ″ and 20 ₃ ″ using a common mold. In other words, 'if you allow connecting the conductive plates 20 ₄₀ provided with a blade receiving spring 22 to tip, for example, tack connection such as a conductive block 20 _2' conductive plate 20 _{and second} block 1b conductive plate 20 of the block 1a with ₁ ", 20 ₃ " can be formed. Also, 'if you can connect the conductive plate 20 ₄₀ in the conductive plate 20 _third block 1b' block 1b conductive plate 20 ₃ in the same manner it is also possible to form the conductive plate 20 ₂ "with. The By doing so, the die cost of the conductive plate 20 of the blocks 1a and 1b can be reduced.

The indoor wiring method using the wiring device 1 of the present invention will be described below. In the above-described case, a six-branch type block as the sending wiring block 1a and a three-circuit type block 1b for the switch circuit for turning on and off the load 2 with one switch 3 have been described. In the following description, a four-branch type block 1
A description will be given of the case where the block a and the two-circuit type block 1b are used. Further, the wiring device 1 is connected to the blocks 1a to 1c.
Will be described.

In the case of FIG. 15, the power supply line is branched into three at a block 1a, and an outlet 4 is connected to each branch end. The block 1b is connected to a lighting device as a load 2 provided on the ceiling and a switch 3 provided near the door 30 at the entrance of the room so that the switch 3 can control lighting of the lighting device. is there. Further, the block 1c is connected to a bed lighting provided on the wall as the load 2, and provided near the door 30 at the entrance of the room and connected to the switch 3 for operating the lighting equipment on the ceiling. , And a switch 3 disposed on a wall near the bed 31 so that the lighting of the bed lighting can be controlled by any of the switches 3.

As described above, when the wiring apparatus of the present embodiment is used to perform indoor wiring, the power cable 5 and the branch cable 6 connected to the load 2 and the wiring devices 3 and 4 can be connected by the connector system. Wiring work can be easily performed. In addition, the connection part 1 to which the connectors 7, 8 for connecting the load 2, the wiring devices 3, 4 and the cables 5, 6 from the power supply correspond.
0a, 10b, since 10c ₁ ~10c ₃ only are the erroneous connection prevention structure provided to be connected, not erroneous connection is made. Therefore, wiring can be performed easily and accurately even by a person who does not have specialized knowledge. In the above description, load 2,
The case where the malfunction prevention structure is provided for the types of the wiring devices 3 and 4 and the power supply has been described. However, in order to further prevent the malfunction connection, the connectors 7 and 8 that can be connected for each of the blocks 1a to 1c are uniquely determined. It does not matter.

Incidentally, in the case of the indoor wiring, the branch cable 4 is not directly connected to the load 2 or the wiring devices 3 and 4, but the wiring is performed using the relay cable 6b. More specifically, a harness plug 8 is attached to the end of the equipment cable 6a on the side of all the loads 2 and the wiring devices 3 and 4, and a relay cable 6b for relaying between the loads 2 and the wiring devices 3 and 4 and the wiring device 1. The wiring is performed indoors by using a wiring harness plug 8 attached to the wiring device 1 and a harness connector 7 attached to the load 2 or the wiring devices 3 and 4. In this way, the connection between the load 2 and the wiring devices 3 and 4 can be easily and reliably made by the connector system. The extension cables 6 connected to each
If the apparatus cable 6a can be distinguished from the apparatus cable 6a, the risk of erroneous connection is reduced.

If this indoor wiring method is adopted, in a condominium or the like where the layout of the room or the installation location of the wiring device 5 is determined, if the relay cable 6b having a predetermined length is prepared, it can be used on site. Harness connector 7
Since only the connection with the harness plug 8 is performed, the connection work becomes easy. Also, if the wiring device 1 of the present embodiment is installed in advance in various places in the room and the relay cables 6b having different lengths are prepared in advance, the indoor wiring can be freely performed, and the layout of the room can be changed. It is also possible to easily cope with a case where the installation location of the wiring device is changed or the like.

In the above description, the case where indoor wiring is performed by ceiling wiring has been described. However, the present invention relates to floor wiring using a double floor structure floor called a so-called system floor applied to offices and the like. It can also be applied to wiring using walls and walls, and also to internal wiring in furniture such as OA panels.

[0036]

As described above, the present invention is provided with a plurality of connecting portions for connecting at least the power cable and the load and the plurality of branch cables connected to the two switches by a connector system. The branch cable connected to the load or switch can be connected by a connector system, making wiring work easier. Also, only the connectors and connectors that connect the cables from the load, switch, and power supply can be connected. Since the wrong connection prevention structure is provided, the wrong connection is not performed, and therefore, wiring can be easily and accurately performed even by a person who does not have specialized knowledge. In addition, since a circuit section that forms a three-way switch circuit between the load and the two switches is built in between the respective connection sections, three
It can also be used when forming a road switch circuit.

[Brief description of the drawings]

FIG. 1 is a perspective view of one block of a wiring device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a perspective view showing an arrangement structure of a circuit unit according to the embodiment.

FIG. 5 is an explanatory diagram of a method for reducing a die cost in the embodiment.

FIG. 6 is a perspective view when the same is connected.

FIG. 7 is an exploded perspective view of another block of the wiring device.

FIG. 8 is a plan view of the same.

FIG. 9 is a plan view showing a state in which the cover is removed.

FIG. 10 is an exploded perspective view of still another block of the wiring device.

FIG. 11 is a plan view of the same.

FIG. 12 is a plan view with the cover removed therefrom.

FIG. 13 is a plan view of components of the circuit unit according to the third embodiment.

FIGS. 14A and 14B are plan views showing a wiring device formed by connecting respective blocks. FIG.

FIG. 15 is an explanatory diagram showing an indoor wiring method using the above wiring device.

[Explanation of symbols]

1 wiring apparatus 1c block 2 load 3, 4 wiring device 5 Power cable 6 branched cable 7 harness connector 8 harness plug 10a, 10c _1, 10c ₂ connected portion 14b flutes 20 ₁ to 20 ₆ conductive plates

Continuation of the front page (56) References JP-A-3-179684 (JP, A) JP-A-59-90375 (JP, A) JP-A 62-167379 (JP, U) JP-A 61-23193 (JP , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 31/06 H01R 13/64

Claims (2)

(57) [Claims] 1. A wiring device for branching a plurality of power supplies and supplying them to a wiring device such as a switch or an outlet or a load or the like, wherein at least a plurality of branch cables and a power cable connected to the load and the two switches are connected by connectors. A plurality of connection units connected in a system, and a circuit unit for forming a three-way switch circuit between the load and the two switches between the connection units, and a cable from the load, the switch, and the power supply. A wiring device, comprising: an erroneous connection prevention structure that enables only a connector corresponding to a connector to be connected and a connector to be connected. 2. The wiring device according to claim 1, wherein the erroneous connection preventing structure is formed by a concave / convex fitting portion that allows only a connector and a corresponding portion to be fitted.