JPH11285134A - Junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a junction box by which the workability of a wiring process can be improved. SOLUTION: The housing 1 of a junction box is composed of a body 1a and a cover 1b. Power supply line connections 2 are formed in the facing two surfaces of the housing 1 respectively at approximately central positions. A pair of branch line connections 3 are formed on both the sides of each power supply line connections 2. The power supply line connections 2 has a quick connect terminal parts 28 constituted of terminal plates 7 and locking springs 8. A release button 9 per releasing the wire connection state of the quick connect terminal part 28 is provided to have its operating part 9a exposed. Furthermore, a circuit indication part 41 which indicates the circuit diagram of the internal circuit and names indicating parts 42a and 42b which indicate the names are provided on the surface of the cover 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint box used for branching a power line.

[0002]

2. Description of the Related Art In recent years, in office buildings and the like, a new floor surface is formed at appropriate intervals on a floor surface such as an underfloor slab (hereinafter, the floor thus formed is referred to as a free access floor). ), On a raised floor (ie, the space between the building floor and the newly formed floor)
Floor wiring systems that perform indoor wiring using the grooves provided in the floor are often used. In this floor wiring system, as shown in FIG. 6, a plurality of outlets C are buried on the floor, and wiring devices H and I such as a plurality of outlets are arranged on the floor. Here, the power cords of the wiring devices H and I are drawn under the floor in the demarcation box D. A harness plug A is attached to the end of the power cord of each of the outlet C and the wiring devices H and I, and further branches a joint box B 'for branching the main line L0 and a branch circuit L' branched by the joint box J. The harness plug A is connected to the joint box B ′ to perform floor wiring freely. The joint box B 'for branching the main line L0 and the branch circuit L' has a power line connecting portion to which the main line L0 and the branch circuit L 'of the power supply are connected in a quick connection manner, and the harness plug A is detachable. Is provided with a branch line connection part connected to the power supply. When simply connecting the power supply line to the wiring devices H and I or extending the power supply line, a harness connector serving as the receiving side of the harness plug A is attached to the power supply side, and the harness plug is connected to the other end. A can be attached.

[0003]

However, in the conventional joint box, in order to connect the power supply line, a so-called quick connection terminal for holding the power supply line between the lock spring and the terminal plate by the spring force of the lock spring. When the power supply line is detached from the quick connection terminal portion, the locking spring is pressed in a direction away from the terminal plate to release the engagement state between the quick connection terminal portion and the power supply line. The release button was provided inside the housing. Therefore, the release button cannot be directly operated from the outside of the housing, and there has been a problem that it takes time and effort to remove the power supply line. Also, the joint box does not display information such as the internal circuit, electrical characteristics, or the use of branch lines, so it is necessary to read various information from wiring diagrams and the like during wiring work and maintenance, which means that workability is poor. There were also problems.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a joint box with improved workability at the time of wiring.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a power supply line connection comprising a quick connection terminal portion for holding a core wire of a power supply line between a terminal plate and a locking spring. Part, while being electrically connected to the power line connection part,
Fitted in the recess formed in the front of the harness plug,
A blade insertion port for inserting a blade protruding into the recess of the harness plug is formed on the front surface, and a branch line connection portion for sandwiching the blade with a built-in blade receiving portion is disposed in the housing. Is provided with a display unit for displaying information necessary for electric wiring, so that information necessary for electric wiring can be read from the display of the display unit, and workability of wiring work is improved.

According to a second aspect of the present invention, in the first aspect of the present invention, since the display section includes a circuit display section for displaying an internal circuit diagram, the circuit diagram of the internal circuit can be easily determined. According to a third aspect of the present invention, in the first aspect of the present invention, the display unit includes a name display unit for displaying a use and a name of the branch line connection unit and the power line connection unit. The purpose and name of the connection can be easily determined.

According to a fourth aspect of the present invention, in the first aspect, a connecting member for connecting and electrically connecting the terminal plate of the power supply line connecting portion and the blade receiving portion of the branch line connecting portion is provided in the housing. Since it is housed, wiring between the terminal plate and the blade receiving portion can be eliminated, and labor for internal wiring can be eliminated. According to a fifth aspect of the present invention, in the invention of the fourth aspect, in a case where the branch line connecting portion is formed on one of two opposing surfaces of the housing, the blade receiving portions of each branch line connecting portion are integrally connected. Since the blade receiving spring body is formed and the blade receiving spring body is formed in a common shape that can be exchanged, the number of parts can be reduced.

According to a sixth aspect of the present invention, in the first aspect of the invention, the branch line connecting portion is provided in a direction substantially parallel to the power line connecting portion. A power line connection portion is provided substantially at the center of the two opposing surfaces, and a pair of branch line connection portions are provided at both sides of the power line connection portion on the two surfaces.
The branch line can be drawn out in a direction substantially parallel to the power supply line.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the branch line connecting portion is provided in a direction substantially orthogonal to the power line connecting portion. Power supply line connection portions are provided on two opposing surfaces of the power supply line, and a pair of branch line connection portions are provided on each of the two opposing surfaces connecting the two surfaces. be able to.

[0010] According to a tenth aspect of the present invention, in the first aspect of the present invention, a concave streak is provided on a side surface of the branch line connecting portion so as to engage with a retaining claw provided on the harness plug. Therefore, the hook of the harness plug and the concave streak can be locked to prevent the harness plug from coming off. According to the eleventh aspect of the present invention, in the first aspect of the present invention, the erroneous connection preventing portion for preventing reverse connection or connection of a harness plug having a different rating or application is provided on the side surface of the branch line connecting portion. Or a harness plug having a different rating or application is not connected, and erroneous connection can be prevented.

According to a twelfth aspect of the present invention, in the first aspect of the present invention, a through hole for inserting a fixing member for fixing to the building material is provided at the center of the housing, so that the housing is formed by the fixing member inserted through the through hole. The housing can be fixed to the material, and the through hole is provided at the center of the housing. Therefore, the outer dimensions of the housing can be reduced as compared with the case where the through hole is provided on the outer periphery of the housing.

According to a thirteenth aspect of the present invention, in the first aspect of the present invention, a first dustproof cover is provided to be fitted to and inserted into a blade insertion opening formed in the branch line connecting portion. It is possible to prevent dust and the like from entering the inside of the housing from the mouth. According to a fourteenth aspect of the present invention, in the first aspect of the present invention, since the second dustproof cover is provided so as to be fitted to the wire insertion opening of the power supply line connection portion, dust or the like may enter the housing from the wire insertion opening when not in use. Can be prevented from entering.

According to a fifteenth aspect of the present invention, in the fourteenth aspect of the present invention, the second dustproof cover is formed with a fitting projection for fitting into the wire insertion opening for mounting. A cover can be attached. According to a sixteenth aspect of the present invention, in the invention of the fifteenth aspect, a plurality of ribs are provided on the outer peripheral portion of the fitting projection and the ribs are pressed against the inner wall of the wire insertion port. By doing so, the second dustproof cover can be hardly removed.

According to a seventeenth aspect of the present invention, in the first aspect of the present invention, the base is fixed to the building material and mounts the housing, and is detachably attached to the base so as to cover the housing. Since the housing is fixed to the building material via the mounting member consisting of the cover and the housing is attached to the mounting member fixed to the building material, it is possible to eliminate the trouble of performing positioning when re-attaching the removed housing. it can.

According to the eighteenth aspect of the present invention, the power supply line connecting portion comprising a quick-connecting terminal portion for holding the core wire of the power supply line between the terminal plate and the locking spring, and connecting the core wire of the power supply line to the terminal plate and the locking spring. And a power line connecting portion composed of a quick connection terminal portion sandwiched between the power line connecting portion and the power line connecting portion, and are fitted into a recess formed on the front surface of the harness plug, and A blade insertion port for inserting a blade protruding into the concave portion is formed on the front surface, and a branch line connection portion for sandwiching the blade with an internally provided blade receiving portion is disposed in the housing, and a locking spring is used at the time of a pressing operation. A release button that presses in a direction away from the terminal plate is rotatably disposed at a portion of the power line connection portion corresponding to the locking spring,
Since the operation part of the release button is exposed on the surface of the housing, the operation state of the release button can be operated to easily release the connection state of the electric wire.

According to the nineteenth aspect of the present invention, in the invention of the eighteenth aspect, the operation portion of the release button is formed in a size that can be manually operated, so that the connection state of the electric wire can be released without using a special tool. . According to the twentieth aspect of the present invention,
In the invention of the eighth aspect, the release button has a fulcrum projection that engages with an engagement recess provided on the inner peripheral surface of the housing, and a pressing projection that abuts on the lock spring. Since the lever rotates about the protrusion and the pressing protrusion presses the locking spring in a direction away from the terminal plate, the connection between the quick connection terminal portion and the electric wire can be released with a small operating force by the leverage principle.

According to a twenty-first aspect, in the eighteenth aspect, a connecting member for connecting and electrically connecting the terminal plate of the power supply line connection portion and the blade receiving portion of the branch line connection portion is provided in the housing. Since it is housed, wiring between the terminal plate and the blade receiving portion can be eliminated, and labor for internal wiring can be eliminated. According to a twenty-second aspect of the present invention, in the twenty-first aspect, when the branch line connection portion is formed on one side of two opposing surfaces of the housing, the blade receiving portions of each branch line connection portion are integrally connected to each other. Since the blade receiving spring body is formed and the blade receiving spring body is formed in a common shape that can be exchanged, the number of parts can be reduced.

According to a twenty-third aspect, in the eighteenth aspect, the branch line connecting portion is provided in a direction substantially parallel to the power line connecting portion. A power line connection portion is provided substantially at the center of the two opposing surfaces, and a pair of branch line connection portions are provided on both sides of the power line connection portion on the two surfaces. It can be pulled out in a substantially parallel direction.

According to a twenty-fifth aspect of the present invention, in the eighteenth aspect, the branch line connecting portion is provided in a direction substantially orthogonal to the power line connecting portion. Power supply line connection portions are provided on two opposing surfaces of the power supply line, and a pair of branch line connection portions are provided on each of the two opposing surfaces connecting the two surfaces. be able to.

According to a twenty-seventh aspect of the present invention, in the invention of the eighteenth aspect, a concave streak is provided on a side surface of the branch line connecting portion so as to engage with a retaining claw provided on the harness plug so as to be capable of being detached. Therefore, the hook of the harness plug and the concave streak can be locked to prevent the harness plug from coming off. According to the twenty-eighth aspect of the present invention, in the invention of the eighteenth aspect, the erroneous connection preventing portion for preventing reverse connection or connection of a harness plug having a different rating or application is provided on the side surface of the branch line connecting portion. Or a harness plug having a different rating or application is not connected, and erroneous connection can be prevented.

According to a twenty-ninth aspect of the present invention, in the invention of the eighteenth aspect, the through-hole for inserting the fixing member for fixing to the construction material is provided at the center of the housing, so that the housing is formed by the fixing member inserted through the through-hole. The housing can be fixed to the material, and the through hole is provided at the center of the housing. Therefore, the outer dimensions of the housing can be reduced as compared with the case where the through hole is provided on the outer periphery of the housing.

According to a thirtieth aspect of the present invention, in accordance with the eighteenth aspect of the present invention, there is provided a first dustproof cover to be fitted and attached to the blade insertion opening formed in the branch line connecting portion, so that the blade can be inserted when not in use. It is possible to prevent dust and the like from entering the inside of the housing from the mouth. In the invention of claim 31, claim 1
According to the eighth aspect of the present invention, since the second dustproof cover is provided so as to be fitted to the electric wire insertion port of the power supply line connection portion, it is possible to prevent dust and the like from entering the housing from the electric wire insertion port when not in use.

According to the invention of claim 32, in the invention of claim 31, the second dustproof cover is formed with a fitting projection for fitting it into the wire insertion opening, so that the second dustproof cover has a simple structure. A cover can be attached. According to a thirty-third aspect of the present invention, in the thirty-first aspect, a plurality of ribs are provided on the outer peripheral portion of the fitting projection and the ribs are pressed against the inner wall of the wire insertion port. By doing so, the second dustproof cover can be hardly removed.

According to a thirty-fourth aspect of the present invention, in the eighteenth aspect, a base portion fixed to the building material and on which the housing is placed, and detachably attached to the base portion so as to cover the housing. Since the housing is fixed to the building material via the mounting member consisting of the cover and the housing is attached to the mounting member fixed to the building material, it is possible to eliminate the trouble of performing positioning when re-attaching the removed housing. it can.

[0025]

Embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) An exploded perspective view of the joint box of the present embodiment is shown in FIG. 1, an external perspective view is shown in FIG. 2, a partially cut-away side view is shown in FIG. 3, and an explanatory view for explaining a use state is shown in FIG. Show.

The housing 1 of the joint box A is formed in a flat rectangular parallelepiped shape, and the housing 1 is made of a synthetic resin body 1a having an open upper surface and a synthetic resin body having an open lower surface attached to the body 1a. And a cover 1b. At the six places on the upper surface of the cover 1b, the fasteners 20
A through hole 21b is formed to insert the rivet 20 into the through hole 21b and the through hole 21a formed in the body 1a corresponding to the through hole 21b. Thereby, the cover 1b is fixed to the body 1a. As shown in FIG. 2, a power line connection portion 2 for connecting a power line is provided at substantially the center of two opposing surfaces of the housing 1, and a pair of branch lines is provided on both sides of each power line connection portion 2. Are provided, and the power supply line connection portion 2 and the branch line connection portion 3 are formed so as to protrude from the end surfaces of the body 1a and the cover 1b, respectively.
As described above, in the present embodiment, since the branch line connecting portion 3 is provided in a direction substantially parallel to the power line connecting portion 2, the branch line 61 connected to the branch line connecting portion 3 as shown in FIG. It can be drawn out in a direction substantially parallel to the power supply line 60 connected to the power supply line connection portion 2.

The body 1a is separated into a central storage space 23 and left and right storage spaces 24a and 24b by two central partition walls 16a running along the short side direction of the housing 1. The central storage space 23 on the side of the power supply line connection portion 2 is further separated into three terminal plate storage portions 17 by two partition walls 16b running along the short side direction of the housing 1, and each terminal plate storage portion 17 has a terminal described later. The plates 7 are respectively stored. Left storage space 24a and right storage space 24b on the branch line connection 3 side
Are provided with a set of three groove portions 29 running along the short side direction of the housing 1, and each groove portion 29 accommodates a later-described branch terminal plate 27.

A pair of through holes 22a through which fixing members such as screws are inserted are formed substantially at the center of the body 1a, and a through hole 22b is formed at a portion of the cover 1b corresponding to the through hole 22a. Are formed, and the through holes 22a, 2
The housing 1 can be attached to the erection material using a fixing member (not shown) such as a screw inserted into the housing 2b, and since the through holes 22a and 22b are provided in the center of the housing 1, the outer periphery of the housing 1 is provided. The outer dimensions of the housing 1 can be reduced as compared with the case where a through hole for inserting the fixing member into the portion is formed. Although the internal structure of the cover 1b is not shown, it is formed in substantially the same manner as the internal structure of the body 1a.

Here, on the surface of the cover 1b, there is provided a circuit display section 41 for displaying a circuit diagram of an internal circuit composed of terminal blocks 25a to 25c, which will be described later. Circuit configuration can be easily grasped. In addition, the power line connection portion 2 of the cover 1b
And a power line connecting portion 2 at the base of the branch line connecting portion 3.
For example, there is provided a name display portion 42a in which characters such as "power" and "feed" are written, and a name display portion 42b in which characters such as "branch" is written indicating the name of the branch line connection portion 3 are provided. . The name display sections 42a and 42b are provided on the cover 1b.
A card with characters such as "power", "feed" and "branch" may be placed in the recess formed in the recess, and the surface of the card may be covered with a transparent cover.
A sticker on which characters such as "branch" are written may be attached.

As described above, since the circuit display section 41 as the display section and the name display sections 42a and 42b are provided on the surface of the housing 1, the circuit display section 41 and the name display sections 42a and 42b are provided.
Information necessary for electric wiring can be read from the display of 42b, and the work of examining the internal circuit diagram and application of the joint box 40 from the drawings and the like at the time of wiring work is omitted, and workability at the time of wiring is improved.

The power supply line connecting portion 2 is formed in a substantially rectangular parallelepiped shape.
A substantially elliptical recess 11 serving as an electric wire insertion port for inserting the power line 60 is provided at substantially the center of the end face of the power line connection portion 2, and the bottom of the recess 11 extends along the short side direction of the housing 1. A row of core wire insertion openings 12 is formed.
Communicate with the terminal board storage section 17 of the central storage space 23, respectively. The terminal plates 7 are stored in the respective terminal plate storage portions 17, and both end portions of the terminal plate 7 are formed in a substantially U-shape. 8 are housed to form a quick connection terminal portion 28. The core wire insertion port 12 is formed so as to become thinner toward the tip, so that the core wire of the power supply wire 60 is reliably inserted between the terminal plate 7 and the locking spring 8.

Here, the quick connection terminal portion 28 composed of the U-shaped portion 7a of the terminal plate 7 and the locking spring 8 will be described in detail with reference to FIGS. Locking piece 8 of locking spring 8
The b and the contact piece 8c are formed at both ends of the central piece 8a by bending both ends of the strip of conductive material having elasticity. The central piece 8a is in contact with the lower surface of the terminal plate 7, the locking piece 8b is inclined so as to approach the upper surface of the terminal plate 7 from the connection portion with the central piece 8a toward the tip edge, and the contact piece 8c is substantially S-shaped. The lock piece 8b and the contact piece 8 provided on the lock spring 8
c faces the upper surface of the terminal plate 7. A notch 7b is provided in the U-shaped portion 7a of the terminal plate 7.

By the way, a recess 34 is formed in the power line connecting portion 2 corresponding to the locking spring 8, and the recess 34 and the inside of the housing 1 are communicated through an opening 35.
The release button 9 is rotatably arranged in the recess 34.
The release button 9 is provided with an operation portion 9a having an operation surface large enough to be pressed by a finger, and pressing protrusions respectively contacting with the lock pieces 8b of the lock springs 8 exposed from the cutouts 7b of the terminal plates 7. 9b, and a fulcrum projection 9c which comes into contact with the inner wall of the cover 1b and serves as a fulcrum of the release button 9. Here, release button 9
Is exposed on the surface of the cover 1b, and when the operation surface, which is the front surface of the operation section 9a, is pressed with a finger, the release button 9
The locking projection 9b of the release button 9 presses the locking piece 8b of each locking spring 8 in a direction away from the upper surface of the terminal plate 7 by rotating around the c. As a result, the core wires of the power supply line sandwiched between the three lock pieces 8b and the terminal pieces 7 can be simultaneously removed. One of the three quick-connecting terminals 28 disposed on both sides of the central storage space 23 is used for grounding.

The branch line connecting portion 3 has a substantially rectangular parallelepiped insertion portion 3b fitted into a concave portion on the front surface of the harness plug 50 wired at the end of the branch line 61. 3b
Is formed with a blade insertion port 19 into which a blade protruding into the recess of the harness plug 50 is inserted. Each plug blade insertion port 19 is provided with a groove 29 in the left and right storage spaces 24a, 24b.
And each of the grooves 29 has 3
A set of branch terminal plates 27 is housed. Blade receiving portions 26 are provided at both left and right ends of the branching terminal plate 27, respectively. The branching terminal plate 27 is housed in the groove portion 29 such that each blade receiving portion 26 faces the blade insertion slot 19. You. The blade receiving portions 26 elastically hold the blades of the harness plug 50 inserted from the blade insertion holes 19 respectively. One of the set of three blade receiving portions 26 is for grounding.

Here, a set of three branch terminal plates 27 disposed in the left and right storage spaces 24a and 24b respectively connect the corresponding terminal plates to each other by lead plates 5a, 5b and 5c, and the lead plates 5a The terminal blocks 25a, 25b, and 25c are formed by connecting the branching terminal plate 27 connected by the connecting members 5 to 5c and the three terminal plates 7 arranged in the central storage space 23 by the connecting pieces 6 serving as connecting members.

When the power supply line 60 is connected to the power supply line connection portion 2, a core wire (not shown) with the cover of the power supply line 60 removed is inserted from the core wire insertion port 12, and the spring force of the locking spring 8 is adjusted. As a result, the conductor of the core wire is sandwiched between the locking piece 8b and the contact piece 8c of the locking spring 8 and the terminal plate 7, and the leading edge of the locking piece 8b bites into the conductor of the core wire, so that the core wire falls off. Is to be prevented. Therefore, by simply inserting the core wire into the core wire insertion port 12, the core wire is held and the electrical connection to the terminal plate 7 is made. When the core wire of the power supply line 60 connected to the power supply line connection portion 2 is disconnected, the operating portion 9a of the release button 9 exposed on the surface of the cover 1b is pressed, so that the pressing projection 9b of the release button 9 is pressed.
Presses the locking piece 8b of the locking spring 8 and deflects the locking piece 8b away from the terminal plate 7, so that the locking piece 8b is separated from the core conductor and the power line 60 is easily pulled out. Can be.

On the upper surface of the branch line connecting portion 3, there are formed two grooves 14 which run along the direction of insertion of the harness plug 50 and serve as erroneous connection preventing portions. These grooves 14 are fitted with ridges (not shown) formed on the inner surfaces of the recesses of the harness plug 50. The fitting of the grooves 14 with the ridges causes the harness plug 50 to be reversely inserted or rated or used for different purposes. The connection of the different harness plugs 50 is prevented. Further, between the two concave grooves 14, there is formed a concave line 15 which is a locked portion which runs in a direction substantially orthogonal to the concave groove 14. on the other hand,
A lock button 51 is provided on the upper surface of the harness plug 50, and a retaining claw (not shown) provided on the back side of the lock button 51 is engaged with the concave strip 15,
Since the harness plug 50 is prevented from coming off, it is difficult for the harness plug 50 to come off even if an external force or the like is applied. The harness plug 50 can be easily removed from the branch line connecting portion 3 by operating the lock button 51 to release the locked state between the claw and the concave streak 15.

If the positions of the grooves 14 of the branch line connecting portion 3 and the ridges of the harness plug 50 are made different according to the electrical rating and the application, harness plugs having different electrical ratings and applications are connected. Can be prevented. For example, FIGS. 7 to 10 show an incorrect connection prevention unit in the case of a branch cable system.
FIGS. 11 and 12 show the erroneous connection prevention unit of the trunk cable system. The distance L1 between the blades 52 and the distance L between the ridges 50b are different between the branch cable type and the trunk cable type.
2 and L3 are different, and the latter is wider than the former. 100V series and 20
Even in the 0V series, the interval L1 between the blades 52 and the ridge 50b are provided.
Are different from each other, and the latter is wider than the former.

In the case of a two-pin branch cable type having a rating of 20 A, as shown in FIGS. 7A and 7B, a harness plug 50 that fits into the branch line connecting portion 3 of the joint box is used.
The two blades 52 are disposed on the right side of the concave portion 50a when viewed from the front side, and two protrusions 50b are formed on the inner surface of the concave portion 50a. On the other hand, two blade insertion holes 19 into which two blades 52 are respectively inserted are provided on the front surface of the branch line connecting portion 3 of the joint box, and two protrusions 50b are fitted on the upper surface, respectively. Two concave grooves 14 are formed.

In the case of a branch cable system having a grounding 2-pin having a rating of 20 A, as shown in FIGS.
Three plug blades 52 are disposed in the recess 50a of the harness plug 50, and two protrusions 50b are provided on the inner surface of the recess 50a.
Are formed. On the other hand, three blade insertion holes 19 into which three blades 52 are respectively inserted are provided on the front surface of the branch line connecting portion 3 of the joint box, and two protrusions 50b are fitted on the upper surface, respectively. Two concave grooves 14 are formed.

Further, the rating of the branch cable system is 20A.
As shown in FIGS. 9 (a) and 9 (b), two plug blades 52 are disposed in the recess 50a of the harness plug 50 so as to be closer to the right side when viewed from the front side, as shown in FIGS. The protrusion 50 is provided on the inner surface of the concave portion 50a on the side where the plug blade 52 is not provided.
b is formed in one line, and a chamfered portion 50c is formed in a corner portion. On the other hand, two blade insertion holes 19 into which two blades 52 are respectively inserted are provided on the front surface of the branch line connecting portion 3 of the joint box, and the concave groove 14 into which the ridge 50b fits is provided on the upper surface. A chamfered portion 3a that fits into the chamfered portion 50c is formed at the corner.
Are formed.

In the case of a branch cable system for a three-way switch having a rating of 20A, as shown in FIGS. 10 (a) and 10 (b), three plug blades 5 are provided in a recess 50a of a harness plug 50.
2 are provided, and a chamfered portion 50c is formed at a corner portion. On the other hand, three plug blades 52 are respectively inserted into the front surface of the branch line connecting portion 3 of the joint box.
A plurality of blade insertion holes 19 are provided, and a chamfered portion 3a that fits into the chamfered portion 50c is formed at a corner portion.

FIGS. 11 (a) and 11 (b) show a single-phase three-wire (grounding two-pin) cable having a rated power of 20 A of the trunk cable system.
As shown in FIG.
It has substantially the same shape as that of the pin, and the interval L1 between the blades 52 and the interval L2 between the ridges 50b are wider than those of the branch cable type. Further, in the case of a three-phase three-wire system having a rated 20 A of the trunk cable system, FIG.
As shown in (b), it has substantially the same shape as that of the three-way switch of the branch cable type, and has a harness plug 5.
In the case of 0, a single ridge 50b is formed on the inner surface of the concave portion 50a, and a concave groove 14 in which the ridge 50b fits is formed on the upper surface of the branch line connecting portion 3 of the joint box. The interval L1 between the blades 52 and the interval L2 between the ridges 50b are wider than those of the branch cable system.

As described above, the power line 6 is connected to the power line connection portion 2.
0, the core wire of the power supply line 60 to which the connector such as the harness plug 50 is not connected at the end is inserted into the core wire insertion port 12 of the power supply wire connection section 2 and the core wire insertion port 1 is inserted.
2 is connected to a quick-connecting terminal portion 28 comprising a terminal plate 7 and a locking spring 8 housed in the inside. On the other hand, in the case where the branch line 61 is connected to the branch line connection portion 3, the harness plug 50 wired at the end of the branch line 61 is connected to the protrusion for preventing reverse insertion provided on the inner peripheral surface of the concave portion of the harness plug 50. When the ridge is pushed into the branch line connecting portion 3 so as to fit in the direction in which the groove fits into the concave groove 14, the blade inserted into the recess of the harness plug 50 is inserted into the blade insertion port 19.
And is elastically held by the blade receiving portion 26 of the branch terminal plate 27 disposed inside the blade insertion slot 19. Then, the hook of the lock button 51 is locked with the concave streak 15, and the harness plug 50 can be prevented from coming off.

Thus, the power supply line 60 connected to the power supply line connection part 2 and the branch line 61 connected to the branch line connection part 3 are connected to the terminal blocks 25a to 25c, respectively.
The power supply line 60 can be branched to the branch line 61 by connecting the branch line 61 to each branch line connection part 3 as necessary. Note that the branch line 61 thus branched may be connected to another joint box to further branch.

As shown in FIG. 5, the housing 1 of the joint box is attached to a construction material such as a floor via an attachment member 80 comprising a base 81 and a cover 82 having a substantially U-shaped cross section. The base portion 81 includes a mounting plate 83 on which the housing 1 of the joint box is mounted together with an information wiring device 90 including a modular plug insertion port 91a for connecting a signal line and a signal line connection portion (not shown). A fixing piece 8 having a substantially L-shaped cross section and extending from both side edges of the mounting plate 83.
4, 84. The fixing piece 84 is provided with an insertion hole 84a for inserting a fixing screw, and the base 81 is fixed to the erection material by screwing the fixing screw inserted through the insertion hole 84a into the erection material.

The mounting plate 83 is provided with screw holes 83a and 83b for fixing the joint box housing 1 and the information wiring device 90 with screws. The housing 1 is inserted through the through holes 22a and 22b. It is screw-fixed to the mounting plate 83 by the fixing screw 85. Here, since a step is provided between the mounting plate 83 and the fixing piece 84, the joint box housing 1 and the information wiring device 90 are provided.
Can be mounted higher than the building materials. Signal line stoppers 86 are provided on both side edges of the mounting plate 83 corresponding to the information wiring device 90, and the signal lines 86 and 86 are connected to the information wiring device 90 by the signal line stoppers 86. The signal line can be prevented from coming off by holding the line. On two sides of the mounting plate 83 other than the two sides of the mounting plate 83 on which the fixing pieces 84 are extended, locking claws 82b protruding from both side pieces 82a of the cover 82 are locked so that they can be released. A locking piece 83c having a locking hole 83d formed therein is provided.

The cover 82 is formed of a transparent resin. The base 82 is formed by locking the locking claws 82b into the locking holes 83d so as to cover the housing 1 of the joint box and the information wiring device 90. 81 is detachably attached. By the way, as shown in FIGS. 13A and 13B, when the power supply line connection part 2 and the branch line connection part 3 are not used,
First and second dustproof covers 73 and 70 may be attached to prevent dust and the like from entering the inside of the housing 1 from the concave portion 11 and the blade insertion slot 19. Second
The dustproof cover 70 has a fitting projection 71 projecting rearward from the front plate portion 70a, and a plurality of ribs 72 projecting from an outer periphery of the fitting projection 71. Then, the fitting protrusion 71 of the second dustproof cover 70 is fitted into the concave portion 11 provided in the power supply line connection portion 2, and the plurality of ribs 7 are formed.
2 is pressed against the inner wall of the concave portion 11 so that the second dustproof cover 70 is easily fitted and the second dustproof cover 70
Are not easily removed. The first dustproof cover 73 is formed by forming a plurality of convex ribs 74 on the surface of the branch line connecting portion 3 facing the blade insertion port 19, and inserting the convex rib 74 into the blade insertion port 19. , To be connected to the branch line connection portion 3.

(Embodiment 2) FIG. 14 is an exploded perspective view of a joint box according to the present embodiment, FIG. 15 is a partially cutaway side view, and FIG. 16 is an explanatory view illustrating a use state.
The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, the power supply line connection portions 2 are respectively provided on two opposing surfaces in the longitudinal direction of the housing 1, and a pair of two opposing surfaces connecting the two surfaces on which the power supply line connection portions 2 are respectively provided are respectively provided. A branch line connection 3 is provided. Here, since the branch line connection portion 3 is provided in a direction substantially orthogonal to the power supply line connection portion 2, the branch line 61 can be drawn out in a direction substantially orthogonal to the power supply line 60. The body 1a is separated into a central storage space 23 and left and right storage spaces 24a, 24b by two central partition walls 16, 16 running along the short side direction of the housing 1. Power line connection 2
In the central storage space 23 on the side, three terminal board storage portions 17 are provided by two partition walls running along the short side direction of the housing 1.
The terminal boards 7 are housed in the terminal board housing sections 17, respectively. The left storage space 24a and the right storage space 24b on the branch line connecting portion 3 side are respectively formed by a set of three groove portions 29 running along the longitudinal direction of the housing 1 by the partition wall 18.
And each groove 29 has a blade receiving spring piece 4a-4
c is stored.

On the other hand, the internal structure of the cover 1b is the body 1a
In the same manner as in the first embodiment, a circuit display section 41 for displaying the internal circuit of the joint box, a power supply line connection section 2 and a branch line connection section 3 are formed on the surface of the cover 1b. Name display sections 42a, 42 for displaying names
b, the circuit display unit 41 and the name display unit 4
Information necessary for electric wiring can be easily read from the displays 2a and 42b.

The power line connecting portion 2 is formed in a substantially rectangular parallelepiped shape.
A substantially elliptical concave portion 11 for inserting the power line 60 is provided substantially at the center of the power line connecting portion 2, and three rows of core wire insertion holes 12 are formed substantially vertically at the bottom of the concave portion 11. In addition, each core wire insertion opening 12 communicates with the terminal plate storage 17 of the central storage space 23. Further, the core wire insertion opening 12 is formed so as to become thinner toward the tip, so that the core wire of the power supply wire is securely inserted between the terminal plate 7 and the locking spring 8.

The branch line connecting portion 3 is formed in a substantially rectangular parallelepiped shape, and is fitted into a concave portion (not shown) provided on the front surface of the harness plug 50. Three blade insertion holes 19 each having a vertically long hole into which a blade (not shown) protruding into the concave portion is inserted are formed in the end face of the branch line connecting portion 3. The insertion port 19 is provided with left and right storage spaces 24a, 24.
The groove 29 communicates with the groove 29, and each groove 29 accommodates a set of three blade-receiving spring pieces 4a to 4c.

Next, the terminal block 2 housed in the center and left and right storage spaces 23, 24a, 24b of the housing 1
5a to 25c will be described below. Terminal block 2
5a is a substantially U-shaped conductive blade receiving spring piece 4a having a blade receiving portion 26 bent at both ends, and a pair of blade receiving spring pieces 4a, 4a with the blade receiving portion 26 facing outward. L-shaped conductive lead plate 5a, a laterally open conductive terminal plate 7 having a substantially U-shaped cross section, and a conductive connection connecting the lead plate 5a and the terminal plate 7 to each other. And a connecting piece 6 as a member.

The terminal block 25b has a substantially U-shaped conductive blade receiving spring piece 4b having a blade receiving portion 26 bent at both ends.
And a pair of blade receiving spring pieces 4 with the blade receiving portion 26 facing outward.
a conductive lead plate 5b having a central portion connecting b and 4b bent at a substantially right angle in a direction perpendicular to the plane direction; a conductive terminal plate 7 having the same shape as the terminal plate 7 of the terminal block 25a; It comprises a conductive connecting piece 6 for connecting the plate 5b and the terminal plate 7.

The terminal block 25c is a substantially U-shaped conductive blade receiving spring piece 4c having a blade receiving portion 26 bent at both ends.
And a pair of blade receiving spring pieces 4 with the blade receiving portion 26 facing outward.
a conductive lead plate 5c having a central portion connecting c and 4c bent at substantially right angles in the plane direction, and a terminal block 25a.
And a conductive connecting piece 6 for connecting the lead plate 5c and the terminal plate 7 to each other.

The terminal plate 7 of each of the terminal blocks 25a to 25c
Lock springs 8, 8 are arranged at both ends of
The terminal plate 7 and the locking springs 8 constitute a quick connection terminal portion 28. Here, one of the set of three quick connection terminals 28 is used for grounding. In addition, each terminal block 25a-25
c, the blade receiving spring pieces 4a..., the lead plates 5a.
The terminal board 7 is connected to two holes formed in one member by caulking two dowels formed in the other member, and the members are electrically and mechanically connected. Here, the blade receiving spring pieces 4a to 4c and the lead pieces 5a to 5c intersect at different heights, and the terminal blocks 25a to 2c.
5c are provided on the housing 1 so that they do not come into contact with each other.
Is stored inside. That is, the constituent members of the terminal block 25a are arranged above the constituent members of the terminal block 25b, and the constituent members of the terminal block 25c are arranged below the constituent members of the terminal block 25b.

The blade receiving spring pieces 4a, 4c of the terminal blocks 25a, 25c are formed in the same shape and can be interchanged. That is, since the same member is used for the blade receiving spring pieces 4a and 4c with the front and back reversed, the type of parts can be reduced. By the way, each terminal block 25a-
The connection of 25c is performed before assembly into the body 1a. The body 1 of each of the terminal blocks 25a to 25c
Incorporation into a is performed according to the following procedure. First, the terminal block 25c, the terminal plate 7 is disposed in the terminal plate storage portion 17 on the left side of the central storage space 23, and the blade receiving spring pieces 4c, 4c are respectively disposed in the groove 29 on the back side of the left storage space 24a and the right storage space 24b. It is housed in the body 1a so as to fit in the groove 29 on the front side. Next, the terminal block 25b is connected to the terminal plate 7 and the blade receiving spring piece 4.
b and 4b are respectively a terminal plate storage portion 17 in the center of the central storage space 23 and a central groove portion 2 in the left and right storage spaces 24a and 24b.
9 in the body 1a. Finally, the terminal block 25a, the terminal plate 7 is placed in the terminal plate storage portion 17 on the right side of the central storage space 23, and the blade receiving spring pieces 4a, 4a are respectively fitted in the groove portion 29 on the front side of the left storage space 24a, and the right storage space 24b.
And is housed in the body 1a so as to fit in the groove 29 on the back side of the body. When the terminal blocks 25a to 25c are stored, the locking springs 8 are stored at both ends of the terminal plate 7 in advance.

Further, in the blade receiving spring pieces 4a and 4c, a projecting piece 27 protruding laterally is formed between the blade receiving portion 26 and a portion bridging between the blade receiving portions 26 and 26. This protruding piece 2
Positioning ribs for sandwiching the front end 7 in a bifurcated portion at the tip and supporting ribs for supporting the lower surface on the side opposite to the protruding piece 27 are provided in the groove 29 for accommodating the blade receiving spring pieces 4a and 4c of the body 1a. Since it is formed, the positioning of the blade receiving spring pieces 4a and 4c can be easily performed.

As described above, the terminal block 2 is attached to the body 1a.
The cover 1b is mounted with 5a to 25c contained. When the cover 1b is attached, the terminal plate 7 of the quick-connecting terminal portion 28 is attached.
And two lock buttons 9 for releasing the core wire elastically locked between the lock button 8 and the lock spring 8.
a is arranged in the concave portion 34 provided in the portion of the cover 1b corresponding to the branch line connecting portion 2 and is exposed on the surface of the housing 1, so that the operating portion 9a is operated in the same manner as in the first embodiment. The elastic locking state of the core wire can be easily released. Further, since the operation portion 9a is formed in a size that can be manually operated, the core wire can be replaced without using a special tool.

FIG. 14 is an explanatory view for explaining the use state of this joint box. The floor surface 54 is provided with grooves 55a and 55b having substantially the same width and depth.
55b intersect at a substantially right angle. At the location where the grooves 55a and 55b intersect, the power supply line connection part 2 is directed into the groove 55a where the power supply line 60 is provided, and the branch line connection part 3 is placed in the groove 55b where the branch line 61 is provided. A joint box is provided in the direction, and the branch line connecting portion 3 is provided in a direction substantially orthogonal to the power line connecting portion 2, so that the branch line 61 can be pulled out in a direction substantially orthogonal to the power line 60. it can.

(Embodiment 3) FIGS. 17 and 18 are exploded perspective views of a joint box according to this embodiment. Since the basic configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof will be omitted. The housing 1 of the joint box A is formed in a flat rectangular parallelepiped shape. The housing 1 includes a synthetic resin body 1a having an open upper surface, and a synthetic resin cover 1b attached to the body 1a and having an open lower surface. Consists of At three places on the upper surface of the cover 1b, insertion holes 21b for inserting the rivets 20 are formed, and the insertion holes 21a formed in the body 1a corresponding to the insertion holes 21b and the insertion holes 21b.
The cover 1b is fixed to the body 1a by inserting the rivet 20 and crimping the tip. A power line connection portion 2 for connecting a power line is provided on one side of two opposing surfaces of the housing 1, and a branch line connection portion 3 for branching is provided on the other side, respectively. The connecting portion 2 and the branch line connecting portion 3 are formed so as to protrude from the end surfaces of the body 1a and the cover 1b, respectively. As described above, in the present embodiment, the branch line connection portion 3 is provided in a direction substantially parallel to the power line connection portion 2, so that the branch line connected to the branch line connection portion 3 is connected to the power line connection portion 2. Can be drawn out in a direction substantially parallel to the power supply line.

The inside of the body 1 a is separated into left and right storage spaces by a partition 16, and the storage space 2 on the side of the power line connection portion 2 is provided.
3 'is further divided into three storage spaces 17 by two partition walls 16b. Storage space 24 on branch line connection 3 side
Is divided into three storage spaces by two partition walls 16d and 16e, respectively, except for a portion communicating with the cutout portion 16c formed in the central portion. A through hole 22a for inserting a fixing member such as a screw is formed at a substantially central portion of the body 1a, and a through hole 22b is formed at a portion of the cover 1b corresponding to the through hole 22a. , Through holes 22a, 2
The housing 1 can be attached to the building material using a fixing member (not shown) such as a screw inserted into the housing 2b.
Although the internal structure of the cover 1b is not shown, it is formed in substantially the same manner as the internal structure of the body 1a.

The terminal blocks 25a to 25c housed in the housing 1 will be described below. The terminal block 25a has a terminal plate 7a formed in a substantially U-shape that opens to the side, and a blade receiving portion 26 formed at both ends, and a central portion between the both blade receiving portions 26 is bent at a substantially right angle. Connection piece 31
a, a lead plate 5a connecting the terminal plate 7a and the branch terminal plate 27a, and two locking springs 8 housed at both ends of the terminal plate 7a. You.

The terminal block 25b is connected to the terminal block 5a.
A terminal plate 7b having the same shape as the terminal plate 7a, a blade terminal plate 27b formed at both ends, and a branching terminal plate 27b formed by connecting the both blade reception units 26 with a linear connecting piece 31b; 7
b and a lead plate 5b for connecting the branch terminal plate 27b to the branch terminal plate 27b;
Two locking springs 8 housed at both ends of the terminal plate 7b
It is composed of

The terminal block 25c is connected to the terminal block 5a.
A terminal plate 7c having the same shape as that of the terminal plate 7a, and a blade receiving portion 26 formed at both ends, and a center portion thereof is bent at a substantially right angle in a direction opposite to the branch terminal plate 7a between the both blade receiving portions 26. A branch terminal plate 27c connected by the connected connection piece 31c,
It comprises a lead plate 5c for connecting the terminal plate 7c and the branching terminal plate 27c, and a locking spring 8 housed at both ends of the terminal plate 7c.

Here, dowels are formed at appropriate positions of the terminal plates 7a to 7c and the branch terminal plates 27a to 27c of the terminal blocks 25a to 25c, and holes of mounting pieces formed at both ends of the lead plates 5a to 5c. The terminal plates 7a to 7c and the branching terminal plates 27a to 27c of the corresponding terminal blocks are respectively caulked.
27c are connected to each other. The terminal blocks 25a,
The branch terminal plates 27a, 27c of 25c are formed in the same shape, and the respective branch terminal plates 27a, 27c are interchangeable, so that the number of parts is reduced by using the branch terminal plates 27a, 27c as common parts. It is.

The terminal plates 7a to 7c and the branch terminal plate 2
Connection between 7a to 27c is performed before assembly into body 1a. Then, the terminal blocks 25a to 25c are assembled into the body 1a by first storing the terminal block 7c in the storage space 17 'of the storage space 23' closest to the partition 16 in the storage space 23 '. The terminal block 25b is accommodated in the form in which the plate 7b is accommodated in the central storage space 17, and finally, the terminal block 25a is accommodated in the form in which the terminal plate 7a is accommodated in the outermost accommodation space 17. With the terminal blocks 25a to 25c housed in this way, the lead plates 5a to 5a
5c are formed so as not to contact each other. When the terminal blocks 25a to 25c are housed in the body 1a, the locking springs 8 are housed in advance at both ends of each of the terminal plates 7a to 7c.

With the terminal blocks 25a to 25c housed in the body 1a in this way, the cover 1b is attached to the body 1a.
On the upper surface of. When the cover 1b is attached, the release button 9 for releasing the quick-connecting terminal portion 28 composed of the terminal plates 25a to 25c and the locking spring 8 is pressed to the housing 1.
In the corresponding area. The release button 9 is for simultaneously releasing the connection of the core wires by the set of three lock springs 8 of each power line connection portion 2, and the operation portion 9 a of the release button 9 is formed in a size that can be manually operated. Operation section 9a of the release button
Is arranged in a concave portion 34 formed in a portion of the cover 1b corresponding to the power line connecting portion 2, and is exposed on the surface of the cover 1b. Therefore, the connection state of the core wire can be manually changed without using a special tool. Can be canceled.

As in the first embodiment, a circuit display section 41 and name display sections 42a and 42b are provided on the surface of the cover 1b. Here, the name display portions 42a and 42b include a concave portion 43 formed in the cover 1b, a card 44 in which the name is written and accommodated in the concave portion 43, and a locking groove 43a formed on an end surface of the concave portion 43 and a locking release. A locking piece 45a that freely locks is formed of a transparent cover 45 protruding from both end edges, and the cover 45 is attached to the recess 43 so as to cover the card 44 housed in the recess 43. The display on the card 44 can be read through the cover 45, and the use of the power supply line connection unit 2 and the branch line connection unit 3 can be easily determined from the display on the card 45.

[0070]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a power supply line connecting portion comprising a quick connection terminal portion for holding a core of a power supply line between a terminal plate and a locking spring; A plug blade insertion port is formed on the front surface, which is electrically connected to the power supply line connection portion, is fitted into a concave portion formed on the front surface of the harness plug, and inserts a plug blade protruding into the concave portion of the harness plug. Since the housing is provided with a branch line connecting portion that sandwiches the blade with the blade receiving portion to be installed, and a display portion that displays information necessary for electric wiring is provided on the surface of the housing.
Information necessary for electric wiring can be read from the display on the display unit, and there is an effect that workability of wiring work is improved.

According to the second aspect of the present invention, since the display section comprises a circuit display section for displaying an internal circuit diagram, there is an effect that the circuit diagram of the internal circuit can be easily identified. Claim 3
According to the invention of claim 1, in the invention according to claim 1, the display unit comprises a name display unit for displaying a use or a name of the branch line connection unit or the power line connection unit. There is an effect that the use and name can be easily determined.

According to the fourth aspect of the present invention, the connecting member for connecting and electrically connecting the terminal plate of the power supply line connecting portion and the blade receiving portion of the branch line connecting portion is housed in the housing. There is an effect that the wiring between the blade and the blade receiving portion can be eliminated, and the trouble of the internal wiring can be eliminated. According to a fifth aspect of the present invention, when the branch line connecting portion is formed on one of two opposing surfaces of the housing, a blade receiving spring body is formed by integrally connecting the blade receiving portions of each branch line connecting portion. However, since the blade receiving spring body is formed in a common shape that can be exchanged, there is an effect that the number of parts can be reduced.

According to a sixth aspect of the present invention, the branch line connecting portion is provided in a direction substantially parallel to the power line connecting portion. A power line connection portion is provided at the center, and a pair of branch line connection portions are provided on both sides of the two power line connection portions, respectively, so that the branch line is drawn out in a direction substantially parallel to the power line. There is an effect that can be.

According to an eighth aspect of the present invention, the branch line connecting portion is provided in a direction substantially orthogonal to the power line connecting portion.
In the invention, the power line connection portions are provided on two opposing surfaces of the substantially rectangular parallelepiped housing, and a pair of branch line connection portions are provided on the two opposing surfaces connecting the two surfaces. There is an effect that it can be pulled out in a direction substantially perpendicular to the power supply line.

According to the tenth aspect of the present invention, the hook for preventing the hook provided on the harness plug is provided on the side surface of the branch line connecting portion with the concave streak for locking and releasing. By locking the concave strip, there is an effect that the harness plug can be prevented from coming off. The invention according to claim 11 is provided with an incorrect connection preventing portion for preventing reverse connection or connection of a harness plug having a different rating or application on the side surface of the branch line connection portion. There is an effect that the harness plug is not connected and erroneous connection can be prevented.

According to the twelfth aspect of the present invention, since the through hole for inserting the fixing member for fixing to the erection material is provided at the center of the housing, the housing can be fixed to the erection material by the fixing member inserted through the through hole. Moreover, since the through hole is provided in the center of the housing, there is an effect that the outer dimension of the housing can be reduced as compared with the case where the through hole is provided on the outer periphery of the housing.

According to the thirteenth aspect of the present invention, since the first dustproof cover is provided so as to be fitted to and inserted into the blade insertion port formed in the branch line connecting portion, dust is introduced from the blade insertion port into the housing when not in use. There is an effect that it is possible to prevent the intrusion of such as. According to the fourteenth aspect of the present invention, since the second dustproof cover is fitted and attached to the electric wire insertion port of the power supply line connection portion, it is possible to prevent dust and the like from entering the inside of the housing from the electric wire insertion port when not in use. This has the effect.

According to the fifteenth aspect of the present invention, the second dustproof cover can be attached with a simple structure because the second dustproof cover is formed with the fitting projection for fitting into the wire insertion opening. effective. Claim 16
In the invention, a plurality of ribs are provided on the outer peripheral portion of the fitting projection,
Since the rib is pressed against the inner wall of the electric wire insertion port, the rib is pressed against the inner wall of the electric wire insertion port, which has an effect that the second dustproof cover can be hardly detached.

The invention according to claim 17 is a mounting member comprising a base fixed to the building material and mounting the housing, and a cover removably mounted on the base so as to cover the housing. And the housing is attached to the mounting member fixed to the erection material, so that there is an effect that it is possible to eliminate the trouble of positioning when re-attaching the removed housing.

The invention according to claim 18 is a power line connecting portion comprising a quick connection terminal portion for holding the core of the power line between the terminal plate and the locking spring, and connecting the core of the power line to the terminal plate and the locking spring. And a power line connecting portion composed of a quick connection terminal portion sandwiched between the power line connecting portion and the power line connecting portion, and are fitted into a recess formed on the front surface of the harness plug, and A blade insertion port for inserting a blade protruding into the concave portion is formed on the front surface, and a branch line connection portion for sandwiching the blade with an internally provided blade receiving portion is disposed in the housing, and a locking spring is used at the time of a pressing operation. Since the release button for pressing the release button away from the terminal plate is rotatably disposed at the power line connection portion corresponding to the locking spring, and the operation portion of the release button is exposed on the surface of the housing,
There is an effect that the operation state of the release button can be operated to easily release the connection state of the electric wire.

According to the nineteenth aspect of the present invention, since the operation portion of the release button is formed in a size that can be manually operated, there is an effect that the connection state of the electric wires can be released without using a special tool. According to a twentieth aspect of the present invention, the release button has a fulcrum projection that engages with an engagement recess provided on the inner peripheral surface of the housing, and a pressing projection that contacts the locking spring. As a result, since the pressing projection presses the locking spring in a direction away from the terminal plate, the connection state between the quick connection terminal part and the electric wire can be released with a small operating force by the leverage principle. This has the effect.

According to a twenty-first aspect, in the eighteenth aspect, a connecting member for connecting and electrically connecting the terminal plate of the power supply line connection portion and the blade receiving portion of the branch line connection portion is provided in the housing. Since it is housed, there is an effect that wiring between the terminal plate and the blade receiving portion can be eliminated, and labor for internal wiring can be eliminated. According to a twenty-second aspect of the present invention, when the branch line connecting portion is formed on one of two opposing surfaces of the housing, a blade receiving spring body is formed by integrally connecting the blade receiving portions of each branch line connecting portion. However, since the blade receiving spring body is formed in a common shape that can be exchanged, there is an effect that the number of parts can be reduced.

According to a twenty-third aspect of the present invention, the branch line connecting portion is provided in a direction substantially parallel to the power line connecting portion.
The invention of Claim 4 provides a power line connection portion substantially at the center of two opposing surfaces of a substantially rectangular parallelepiped housing, and a pair of branch line connection portions at both sides of the power line connection portion on the two surfaces. Therefore, there is an effect that the branch line can be drawn out in a direction substantially parallel to the power supply line.

According to a twenty-fifth aspect of the present invention, the branch line connecting portion is provided in a direction substantially orthogonal to the power source line connecting portion. Since the line connecting portions are provided, and a pair of branch line connecting portions are provided on two opposing surfaces connecting the two surfaces, the branch line can be drawn out in a direction substantially orthogonal to the power supply line. .

According to the twenty-seventh aspect of the present invention, since the concave streak provided on the harness plug is provided on the side surface of the branch line connecting portion, the concave streak is provided on the side of the branch line connecting portion. By locking the concave strip, there is an effect that the harness plug can be prevented from coming off. The invention according to claim 28 is provided with an incorrect connection preventing portion for preventing a harness plug having a reverse connection or a different rating or application from being connected to a side surface of the branch line connection portion. There is an effect that the harness plug is not connected and erroneous connection can be prevented.

According to the twenty-ninth aspect of the present invention, since the through-hole for inserting the fixing member to be fixed to the erection material is provided at the center of the housing, the housing can be fixed to the erection material by the fixing member inserted through the through-hole. Moreover, since the through hole is provided in the center of the housing, there is an effect that the outer dimension of the housing can be reduced as compared with the case where the through hole is provided on the outer periphery of the housing.

According to the thirty-first aspect of the present invention, since the first dust-proof cover is provided so as to be fitted to and inserted into the blade insertion port formed in the branch line connecting portion, dust is not introduced into the housing from the blade insertion port when not in use. There is an effect that it is possible to prevent the intrusion of such as. A thirty-first aspect of the present invention is the second aspect of the present invention according to the eighteenth aspect, wherein the second power-supply line-connecting portion is fitted and inserted into the wire insertion opening.
Since the dustproof cover is provided, it is possible to prevent dust and the like from entering the inside of the housing from the wire insertion port when not in use.

According to the thirty-second aspect of the present invention, the second dustproof cover can be attached with a simple configuration because the fitting projection is formed on the second dustproof cover to be fitted into the wire insertion opening. effective. Claim 33
According to the invention of claim 31, in the invention of claim 31, a plurality of ribs are provided on the outer peripheral portion of the fitting projection and the ribs are pressed against the inner wall of the wire insertion port, so that the ribs are pressed against the inner wall of the wire insertion port. There is an effect that the second dustproof cover can be hardly detached.

A thirty-fourth aspect of the present invention is a mounting member comprising a base fixed to a building material and mounting a housing, and a cover removably mounted on the base so as to cover the housing. And the housing is attached to the mounting member fixed to the erection material, so that there is an effect that it is possible to eliminate the trouble of positioning when re-attaching the removed housing.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a joint box according to a first embodiment.

FIG. 2 is a perspective view of the same.

FIG. 3 is a partially broken side view of the same.

FIG. 4 is an explanatory diagram showing a usage state of the above.

FIG. 5 is an explanatory view showing an attached state of the above.

FIG. 6 is an explanatory diagram illustrating a conventional floor wiring system.

FIGS. 7A and 7B show an incorrect connection preventing portion of the joint box according to the first embodiment, wherein FIG. 7A is a front view of a harness plug, and FIG. 7B is an enlarged view of a main part of the joint box.

8A and 8B show an incorrect connection prevention unit according to the embodiment, wherein FIG. 8A is a front view of a harness plug, and FIG. 8B is an enlarged view of a main part of a joint box.

9A and 9B show an incorrect connection prevention unit of the above, wherein FIG. 9A is a front view of a harness plug, and FIG. 9B is an enlarged view of a main part of a joint box.

10A and 10B show a misconnection prevention unit of the above, wherein FIG. 10A is a front view of a harness plug, and FIG. 10B is an enlarged view of a main part of a joint box.

11A and 11B show an incorrect connection prevention unit, wherein FIG. 11A is a front view of a harness plug, and FIG. 11B is an enlarged view of a main part of a joint box.

12A and 12B show the incorrect connection prevention unit, wherein FIG. 12A is a front view of a harness plug, and FIG. 12B is an enlarged view of a main part of a joint box.

FIGS. 13A and 13B are explanatory views illustrating first and second dustproof covers.

FIG. 14 is an exploded perspective view showing a joint box according to the second embodiment.

FIG. 15 is a partially broken side view of the same.

FIG. 16 is an explanatory diagram showing a use state of the above.

FIG. 17 is an exploded perspective view showing a joint box according to the third embodiment.

FIG. 18 is an exploded perspective view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 1a Body 1b Cover 2 Power line connection part 3 Branch line connection part 7 Terminal plate 8 Lock spring 9 Release button 9a Operation part 28 Quick connection terminal part 41 Circuit display parts 42a, 42b Name display part

Claims (34)

[Claims] A power line connecting portion comprising a quick-connecting terminal portion for holding a core wire of the power line between a terminal plate and a locking spring; and a harness plug electrically connected to the power line connecting portion. A blade insertion hole for inserting a blade protruding into the recess of the harness plug formed in the front surface of the harness plug and having a blade insertion hole formed on the front surface, and a branch line for holding the blade with a blade receiving portion provided therein. A joint box in which a connection part is provided in a housing, and a display part for displaying information necessary for electric wiring is provided on a surface of the housing. 2. The joint box according to claim 1, wherein the display section comprises a circuit display section for displaying an internal circuit diagram. 3. The joint box according to claim 1, wherein the display section comprises a name display section for displaying a use and a name of the branch line connection section and the power line connection section. 4. A connecting member for connecting and electrically connecting a terminal plate of a power supply line connecting portion and a blade receiving portion of a branch line connecting portion is housed in a housing. Joint box. 5. A blade receiving spring body in which the blade receiving portions of each branch line connecting portion are integrally connected to each other when the branch line connecting portion is formed on one of two opposing surfaces of the housing. The joint box according to claim 4, wherein the blade receiving spring body is formed in a common shape that can be exchanged. 6. The joint box according to claim 1, wherein the branch line connecting portion is provided in a direction substantially parallel to the power line connecting portion. 7. A power line connection portion is provided substantially at the center of two opposing surfaces of a substantially rectangular parallelepiped housing, and a pair of branch line connection portions is provided at both sides of the power line connection portion on the two surfaces. The joint box according to claim 1, wherein the joint box comprises: 8. The joint box according to claim 1, wherein the branch line connecting portion is provided in a direction substantially orthogonal to the power line connecting portion. 9. A power supply line connecting portion is provided on each of two opposing surfaces of a substantially rectangular parallelepiped housing, and a pair of branch line connecting portions is provided on each of two opposing surfaces connecting said two surfaces. The joint box according to claim 1. 10. The joint box according to claim 1, wherein a concave strip provided on the harness plug is provided on a side surface of the branch line connecting portion so as to engage with a retaining claw to be releasably locked. 11. The joint box according to claim 1, further comprising a wrong connection preventing portion for preventing a harness plug having a different rating or a purpose from being connected to a side surface of the branch line connecting portion. . 12. The joint box according to claim 1, wherein a through hole for inserting a fixing member for fixing to the building material is provided at the center of the housing. 13. The joint box according to claim 1, further comprising a first dustproof cover fitted and attached to a blade insertion port formed at the branch line connection portion. 14. The joint box according to claim 1, further comprising a second dustproof cover that is fitted and fitted to the electric wire insertion opening of the power supply line connecting portion. 15. The joint box according to claim 14, wherein a fitting projection for fitting the second dustproof cover into the wire insertion opening is formed. 16. The joint box according to claim 15, wherein a plurality of ribs are provided on an outer peripheral portion of the fitting projection, and the ribs are pressed against an inner wall of the wire insertion port. 17. A construction material via an attachment member comprising a base fixed to the construction material and on which the housing is mounted, and a cover detachably attached to the base so as to cover the housing. The joint box according to claim 1, wherein the joint box is fixed to the joint box. 18. A power line connecting portion comprising a quick connection terminal portion for holding a core wire of a power line between a terminal plate and a locking spring, and holding a core wire of a power line between the terminal plate and a locking spring. And a power line connecting portion comprising a quick-connecting terminal portion, which is electrically connected to the power line connecting portion, fitted into a recess formed on the front surface of the harness plug, and protrudes into the recess of the harness plug. A blade insertion port for inserting a blade is formed on the front surface, and a branch line connecting portion for holding the blade with a built-in blade receiving portion is disposed in the housing, and the locking spring is separated from the terminal plate at the time of pushing operation. A joint box, wherein a release button for pressing in a direction is rotatably disposed at a power line connection portion corresponding to a locking spring, and an operation portion of the release button is exposed on a surface of the housing. 19. The joint box according to claim 18, wherein the operation portion of the release button is formed in a size operable manually. 20. The release button has a fulcrum projection that engages with an engagement recess provided on the inner peripheral surface of the housing, and a pressing projection that contacts the locking spring. 19. The joint box according to claim 18, wherein the joint box rotates about the projection, and the pressing projection presses the locking spring in a direction away from the terminal plate. 21. A connection member for connecting and electrically connecting a terminal plate of a power supply line connection portion and a blade receiving portion of a branch line connection portion in a housing. Joint box. 22. A housing according to claim 1, wherein said branch line connecting portions are opposite to each other.
In the case of being formed on one side of the surface, a blade receiving spring body integrally connecting the blade receiving portions of each branch line connecting portion is formed,
22. The joint box according to claim 21, wherein the blade receiving springs are formed in a common shape that can be exchanged. 23. The joint box according to claim 18, wherein the branch line connecting portion is provided in a direction substantially parallel to the power line connecting portion. 24. A power supply line connection portion is provided substantially at the center of two opposing surfaces of a substantially rectangular parallelepiped housing, and a pair of branch line connection portions is provided at both sides of the power supply line connection portion on the two surfaces. The joint box according to claim 18, wherein the joint box comprises: 25. The joint box according to claim 18, wherein the branch line connecting portion is provided in a direction substantially orthogonal to the power line connecting portion. 26. A power supply line connecting portion is provided on each of two opposing surfaces of a substantially rectangular parallelepiped housing, and a pair of branch line connecting portions is provided on each of two opposing surfaces connecting said two surfaces. 19. The joint box according to claim 18, wherein 27. The joint box according to claim 18, wherein a concave strip provided on the harness plug is provided on a side surface of the branch line connecting portion so as to be able to lock and releasably engage with a retaining claw. 28. The joint box according to claim 18, further comprising a wrong connection preventing portion for preventing a harness plug having a different rating or a purpose from being connected to a side surface of the branch line connecting portion. . 29. The joint box according to claim 18, wherein a through hole for inserting a fixing member for fixing to the building material is provided at the center of the housing. 30. The joint box according to claim 18, further comprising a first dustproof cover fitted and attached to a blade insertion hole formed in the branch line connecting portion. 31. The joint box according to claim 18, further comprising a second dust-proof cover that is fitted and attached to the electric wire insertion opening of the power supply line connection portion. 32. The joint box according to claim 31, wherein a fitting projection is formed on the second dustproof cover so as to be fitted into the wire insertion opening. 33. The joint box according to claim 32, wherein a plurality of ribs are provided on an outer peripheral portion of the fitting projection, and the ribs are pressed against an inner wall of the wire insertion port. 34. A construction material via an attachment member comprising a base fixed to the construction material and on which the housing is mounted, and a cover detachably attached to the base so as to cover the housing. The joint box according to claim 18, wherein the joint box is fixed to the joint box.