KR100327896B1 - Joint box - Google Patents

Abstract

Provided is a joint box improved in workability in wiring work.

The housing 1 of the joint box is constituted by a body 1a and a cover 1b and a power line connecting portion 2 to which a power line is connected is formed substantially at the center of two faces of the housing 1 facing each other, A pair of branch line connecting portions 3 are formed on both sides of each power line connecting portion 2. The power line connecting portion 2 is provided with a fastening terminal portion 28 constituted by a terminal plate 7 and a lock spring 8 and is provided with a release button for releasing the connection state of the fastening terminal portion 28 9 are exposed by exposing the operating portion 9a to the surface of the housing 1. [ On the surface of the cover 1b, there are formed a circuit display portion 41 for displaying a circuit diagram of an internal circuit and name display portions 42a and 42b for displaying a name.

Description

Joint box {JOINT BOX}

The present invention relates to a joint box used for branching (breaking) a power line.

2. Description of the Related Art Recently, in an office building or the like, a new floor is formed at an appropriate interval on a floor surface of a floor slab or the like (hereinafter, the floor formed as described above is referred to as a pre- A space between a surface and a newly formed bottom surface) is used as a bottom wiring system. In this floor wiring system, as shown in Fig. 6, a plurality of outlets C are embedded in the floor, and wiring mechanisms H and I such as a plurality of outlets are arranged on the floor. Here, the power cord of the wiring mechanisms (H) and (I) is pulled down to the bottom of the demarcation box (D). A harness plug A is mounted at the tip of the power cord of the receptacle C and the wiring mechanisms H and I and a joint box B 'for branching the trunk L0, The harness plug A is connected to the joint box B 'for branching the branch circuit L' branched by the box J to free the bottom wiring. The joint box B 'for branching the trunk L0 or the branch circuit L' is connected to the power line L0 connected to the trunk L0 and the branch circuit L ' And a branch line connecting portion provided with a connecting portion and to which the harness plug A is detachably connected. When the power line is simply connected to the wiring mechanism H, I or the like, or when the power line is extended, a harness connector serving as a receiving side of the harness plug A is mounted on the power supply side, The harness plug (A) can be mounted.

However, in the conventional joint box, there is provided a so-called quick terminal portion for clamping a power line between the lock spring and the terminal plate by the elastic force of a lock spring for connecting the power line, The release button for releasing the engagement state between the quick release terminal portion and the power line is disposed inside the housing. Therefore, the release button can not be directly operated from the outside of the housing, and there is a problem that it takes time to separate the power line. In addition, since information such as the internal circuit portion, the electric characteristics, and the purpose of the branch line are not displayed in the joint box, various information must be read from the wiring diagram or the like at the time of wiring work or maintenance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a joint box improved in workability at the time of wiring.

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

2 is a perspective view of Embodiment 1. Fig.

3 is a partially cut-away side view of Embodiment 1. Fig.

4 is an explanatory view showing a use state of the first embodiment;

5 is an explanatory view showing a mounting state of the first embodiment;

6 is an explanatory view for explaining a conventional floor wiring system;

Fig. 7A is a front view of a harness plug illustrating a branch cable type erroneous connection preventing portion of a joint box according to the first embodiment; Fig.

7B is an enlarged view of the main part of the branch line connecting portion of the joint box.

8A is a front view of a harness plug illustrating a branch cable type erroneous connection preventing portion of a joint box according to Embodiment 1,

8B is an enlarged view of the main part of the branch line connecting portion of the joint box.

Fig. 9A is a front view of a harness plug illustrating a branch cable type erroneous connection preventing portion of a joint box according to Embodiment 1, showing another embodiment; Fig.

9B is an enlarged view of the main part of the branch line connecting portion of the joint box.

10A is a front view of a harness plug illustrating a branch cable type erroneous connection preventing portion of a joint box according to Embodiment 1,

Fig. 10B is an enlarged view of the main part of the branch line connecting portion of the joint box; Fig.

Fig. 11A is a front view of a harness plug illustrating an example of a trunk cable type erroneous connection preventing portion of a joint box according to Embodiment 1. Fig.

FIG. 11B is an enlarged view of the main part of the joint box; FIG.

Fig. 12A is a front view of a harness plug illustrating another embodiment of the joint cable preventing method according to the first embodiment,

12B is an enlarged view of the main part of the joint box.

13 is an exploded perspective view showing a joint box according to the second embodiment;

14 is an explanatory view showing a use state of the second embodiment;

15 is an exploded perspective view showing a joint box of Embodiment 3. Fig.

16 is an exploded perspective view of Embodiment 3;

DESCRIPTION OF THE REFERENCE NUMERALS (S)

1: housing, 1a: body

1b: cover, 2: power line connection part

3: Branch line connection part, 7: Terminal board

8: Lock spring, 9: Release button

9a: Operation section, 28: Quick release terminal section

41: Circuit display section, 42a, 42b: Name display section

In order to achieve the above-described object, the present invention proposes a power supply line connecting portion comprising a power supply line connecting portion comprising a quick-connect terminal portion for sandwiching a core wire of a power supply line between a terminal plate and a lock spring, A plug blade insertion port for fitting a plug blade protruding into the concave portion of the harness plug is formed on the front surface of the harness plug so as to be fitted in the concave portion, And the display portion for displaying information necessary for electric wiring is formed on the surface of the housing. Therefore, the information required for the electric wiring can be read out on the display portion of the display portion, and the workability of the wiring work can be improved.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)

Fig. 1 is an exploded perspective view of the joint box according to the present embodiment, Fig. 2 is an external perspective view thereof, Fig. 3 is a partially broken side view thereof, and Fig.

The housing 1 of the joint box A is formed in a flat rectangular parallelepiped shape. The housing 1 has a body 1a made of a synthetic resin having an open top and a synthetic resin bell mouth And a cover 1b. Six holes on the upper surface of the cover 1b are formed with insertion holes 21b for inserting the fixed rivets 20. The insertion holes 21b and the insertion holes 21b correspond to the body 1a The cover 1b is fixed to the body 1a by inserting the fixed rivet 20 and caulking the tip thereof. As shown in Fig. 2, a power supply line connecting portion 2 for connecting a power supply line is formed substantially at the center of two opposing surfaces of the housing 1, and on both sides of each power supply line connecting portion 2, The power line connecting portion 2 and the branch line connecting portion 3 are formed so as to protrude from the end faces of the body 1a and the cover 1b respectively. 4, the branching line 61 connected to the branching line connecting portion 3 is connected to the power line connecting portion 3, and the branching line connecting portion 3 is connected to the power line connecting portion 2, Can be drawn in a direction substantially parallel to the power supply line (60) connected to the connection part (2).

The body 1a is separated into a central storage space 23 and left and right storage spaces 24a and 24b by two row central partitions 16a formed along the short side direction of the housing 1 . The central accommodating space 23 on the side of the power line connecting portion 2 is separated into three terminal plate water receiving portions 17 by two row of partition walls 16b formed along the short side direction of the housing 1, And a terminal board 7 to be described later is housed in the lead portion 17, respectively. Three pairs of groove portions 29 (29) are formed in the left (left) accommodating space 24a and the right (right) accommodating space 24b of the branch line connecting portion 3 side along the short side direction of the housing 1, And a groove terminal board 27 to be described later is accommodated in each groove 29. [

A pair of through holes 22a for inserting a fixing member such as a screw is bored in a substantially central portion of the body 1a and a through hole 22b is formed in a portion of the cover 1b corresponding to the through hole 22a The housing 1 can be mounted on the building material using a fixing member (not shown) such as a screw threaded through the through holes 22a and 22b, 22a and 22b are formed at the center of the housing 1, the outer dimensions of the housing 1 can be made smaller than the case where the through holes for inserting the fixing member are formed in the outer peripheral portion of the housing 1. [ The internal structure of the cover 1b is formed to be substantially the same as the internal structure of the body 1a, though not shown.

A circuit display section 41 for displaying a circuit diagram of an internal circuit including terminal blocks 25a to 25c to be described later is formed on the surface of the cover 1b. In the display of the circuit display section 41, The configuration can be easily grasped. A portion of the portion of the cover 1b where the power line connecting portion 2 and the branch line connecting portion 3 are attached is marked with a letter indicating the name of the power line connecting portion 2, A name display section 42b in which characters such as " branch " for displaying the names of the name display section 42a and the branch line connection section 3 are written. The name display portions 42a and 42b may be configured such that a card in which characters such as " power ", " transfer ", " branch " are written in a recess formed in the cover 1b, Quot ;, " power ", " transfer ", " branch ", and the like.

As described above, since the circuit display section 41 and the name display sections 42a and 42b, which are the display sections, are formed on the surface of the housing 1, the circuit display section 41 and the name display sections 42a and 42b It is possible to omit the time for inspecting the internal circuit diagram of the joint box 40, the use thereof, etc. in the drawing or the like at the time of wiring work, and the workability at the time of wiring can be improved.

The power line connecting portion 2 is formed in a substantially rectangular parallelepiped shape and a concave portion 11 which is a substantially circular wire insertion hole for inserting the power line 60 is formed at the center of the end of the power line connecting portion 2 Three core wire insertion ports 12 are formed on the bottom surface of the recess 11 in the direction of the short side of the housing 1. The core wire insertion ports 12 are respectively formed in the terminal accommodating space 23, (17). The terminal plate 7 is housed in each of the terminal plate number accommodating portions 17 and both end portions of the terminal plate 7 are each formed in a substantially U shape so that the lock spring 8 And the quick-release terminal portion 28 is formed. The core wire insertion port 12 is formed so as to be thinner at the tip end and the core wire of the power supply wire 60 is securely inserted between the terminal plate 7 and the lock spring 8. [

Here, the quick-release terminal portion 28 composed of the U-shaped portion 7a of the terminal plate 7 and the lock spring 8 will be described in detail with reference to Figs. 1 and 3. Fig. The lock piece 8b and the contact piece 8c of the lock spring 8 are formed at both ends of the center piece 8a by bending both ends of a base plate of a conductive material having elasticity. The central piece 8a contacts the lower surface of the terminal plate 7 and the lock piece 8b is inclined in the direction close to the upper surface of the terminal plate 7 toward the leading edge on the connecting portion with the center piece 8a, The lock piece 8b and the contact piece 8c provided on the lock spring 8 are opposed to the upper surface of the terminal plate 7. The lock piece 8c is bent in a substantially S- A notch 7b is formed in the C-shaped portion 7a of the terminal board 7. [

A recess 34 is formed in a portion of the power supply line connecting portion 2 corresponding to the lock spring 8 and the element 34 and the inside of the housing 1 are connected to each other through the opening 35 And a releasing button 9 is rotatably disposed on the element 34. [0034] The release button 9 has an operation portion 9a having an operation surface sized to be pressed by a finger and a lock piece 8b of each lock spring 8 exposed at a notch 7b of each terminal plate 7, And a fulcrum protrusion 9c which touches the inner wall of the cover 1b and serves as a supporting point of the release button 9. [ Here, the release button 9 is exposed on the surface of the cover 1b, and when the operation surface of the operation section 9a is pressed with a finger, the release button 9 is rotated around the fulcrum protrusion 9c The pressing projection 9b of the release button 9 pushes the lock piece 8b of each lock spring 8 in a direction in which the lock piece 8b is detached from the upper surface of the terminal plate 7. [ As a result, the core wire of the power line sandwiched between the three lock pieces 8b and the terminal plate 7 can be simultaneously detached. One of the three sets of quick-release terminal portions 28 disposed on both sides of the central accommodating space 23 is for grounding.

The branch line connecting portion 3 has an approximately rectangular parallelepiped fitting portion 3b which is fitted into the concave portion of the front surface of the harness plug 50 wired at the end portion of the branch line 61, 3b are formed with a plug blade insertion port 19 into which a plug blade projecting into the recess of the harness plug 50 is inserted. Each of the plug-inserting openings 19 communicates with the groove 29 of the left and right accommodating spaces 24a and 24b. Each of the groove portions 29 accommodates three sets of branching terminal plates 27 each. The branching terminal plate 27 is formed on the left and right ends of the groove portion 29 so as to face the plug blade inserting opening 19. [ Respectively. The plug blades 26 elastically hold the plug blades of the harness plugs 50 inserted from the plug blade insertion holes 19, respectively. One of the three pairs of plug leg portions 26 is for grounding.

Each of the three branching terminal plates 27 arranged in the right and left storage spaces 24a and 24b is connected to the corresponding terminal plate by means of lead plates 5a, 5b and 5c, 5b and 25c and the three terminal plates 7 arranged in the central accommodating space 23 are connected to each other by the connecting piece 6 which is a connecting member so that the terminal blocks 25a, 25b and 25c ).

When a core wire (not shown) with a covering of the power line 60 is inserted from the core wire insertion port 12 into the power line connecting portion 2, the elastic force of the lock spring 8 Conductor of the core wire is sandwiched between the lock piece 8b and the contact piece 8c of the lock spring 8 and the terminal plate 7 so that the tip of the lock piece 8b is pierced by the conductor of the core wire So that the core wire can be prevented from falling off. Therefore, only by inserting the core wire into the core wire insertion port 12, the core wire is held and the electrical connection to the terminal board 7 is made. When separating the core wire of the power supply line 60 connected to the power supply line connecting portion 2, by pressing the operating portion 9a of the release button 9 exposed on the surface of the cover 1b, 9 pushes the lock piece 8b of the lock spring 8 and causes the lock piece 8b to be bent in the direction of separating from the terminal plate 7, The power line 60 can be easily pulled away from the conductor.

On the upper surface of the branch line connecting portion 3, there is formed a groove 14, which is a two-line erroneous connection preventing portion formed along the inserting direction of the harness plug 50. These recesses (14) are fitted with a ridge (not shown) formed on the inner surface of the recessed portion of the harness plug (50). The harness plug 50 is prevented from being reversely inserted or the harness plug 50 having a different purpose or use is connected due to the engagement of the groove 14 with the projection. Between the two rows of grooves 14, there is formed a groove 15, which is an engaging portion formed in a direction substantially perpendicular to the groove 14. On the other hand, a lock button 51 is disposed on the upper surface of the harness plug 50. An engagement protrusion (not shown) formed on the rear surface of the lock button 51 is engaged with the groove 15, The separation of the plug 50 is prevented, so that even when an external force or the like is applied to the harness plug 50, the separation is difficult. The harness plug 50 can be easily separated from the branch line connecting portion 3 by releasing the locked state between the click and the groove 15 by operating the lock button 51. [

It is possible to prevent connection of harness plugs having different electrical ratings or applications from each other if the positions of forming the groove of the harness plug 50 in the groove 14 of the branch line connecting portion 3 are made different depending on the electrical rating and the use. For example, the erroneous connection preventing portion in the case of the branch cable method is shown in Figs. 7A to 10B , and the erroneous connection preventing portion in the trunk cable method is shown in Figs. 11A to 12B . In the case of the branched cable type or the trunk cable type, the intervals L1 of the plug blades 52 and the intervals L2 and L3 of the ridges 50b are different from each other. In the latter case, . In addition, even in the case of the 100V series and the 200V series, the interval L1 between the plug blades 52 and the intervals L2 and L3 between the protrusions 50b are different from each other. In the latter case, have.

7A and 7B, in the recessed portion 50a of the harness plug 50 fitted in the branch line connecting portion 3 of the joint box, two plug blades (not shown) 52 are biased to the right as seen from the front side, and two rows of ridges 50b are formed on the inner surface of the recess 50a. On the other hand, on the front surface of the branch line connecting portion 3 of the joint box, there are formed two plug blade inserting openings 19 into which the two plug blades 52 are respectively inserted, and on the upper surface, two rows of ridges 50b (14) are formed.

8A and 8B, three plug blades 52 are disposed in the concave portion 50a of the harness plug 50. In the case of the grounding two- Two rows of ridges 50b are formed on the inner surface of the base 50a. On the other hand, on the front surface of the branch line connecting portion 3 of the joint box, three plug blade inserting holes 19 into which the three plug blades 52 are inserted are formed, (14) are formed.

9A and 9B, two plug blades 52 are provided in the concave portion 50a of the harness plug 50 in the case of a single pole switch having a rated cable length of 20 A, A row 50b is formed on the inner surface of the concave portion 50a on the side where the plug blades 52 are not disposed and a chamfered portion 50c is formed at the corner portion . On the other hand, on the front surface of the branch line connecting portion 3 of the joint box, there are formed two plug blade inserting holes 19 into which the two plug blades 52 are respectively inserted, and a groove 14 in which the ridge 50b is fitted is formed on the upper surface And a corner portion 3a is formed at the corner portion so as to be fitted to the forehead base portion 50c.

10A and 10B, in the recessed portion 50a of the harness plug 50, three plug blades (not shown) are provided in the three- And a chamfered portion 50c is formed at a corner portion. On the other hand, on the front surface of the branch line connection portion 3 of the joint box, three plug blade insertion openings 19 into which the three plug blades 52 are respectively inserted are formed, and at the corners thereof, (3a) are formed.

As shown in Figs. 11A and 11B, in the case of a single-phase three-wire (ground two-pin) cable of rated 20 A of the trunk cable system, And the interval L1 of the plug blades 52 and the interval L2 of the ridges 50b are wider than those of the branch cable type.

As shown in Figs. 12A and 12B, the three-phase (3-phase) 20A rated cable of the trunk cable type has substantially the same shape as that of the trunk cable type 3 switch, and the harness plug 50 A ridge 50b is formed on the inner surface of the concave portion 50a and a concave groove 14 is formed on the upper surface of the branch line connecting portion 3 of the joint box to receive the ridge 50b. The interval L1 of the plug blades 52 and the interval L2 of the ridges 50b are wider than those of the branch cable type.

As described above, when the power line 60 is connected to the power line connecting portion 2, the core wire of the power line 60, to which the connector such as the harness plug 50 is not connected, Is inserted into the core wire insertion port 12 of the core wire 2 and connected to the fastening terminal portion 28 composed of the terminal plate 7 and the lock spring 8 accommodated in the core wire insertion port 12. [ On the other hand, when connecting the branch line 61 to the branch line connecting portion 3, the harness plug 50 wired at the end portion of the branch line 61 is formed on the inner peripheral surface of the recess portion of the harness plug 50, The plug blade protruding in the recess of the harness plug 50 is inserted into the plug blade inserting port 19 and the plug inserting port 19 is inserted into the plug inserting port 19, And is elastically sandwiched between the plug-receiving portion 26 of the branching terminal plate 27 disposed on the side of the branching terminal board 27. [ Then, the click of the lock button 51 is engaged with the groove 15, so that the harness plug 50 can be prevented from coming off.

The power line 60 connected to the power line connecting portion 2 and the branching line 61 connected to the branch line connecting portion 3 are connected to each other through the respective terminal blocks 25a to 25c, The power line 60 can be branched to the branch line 61 by connecting the branch line 61 to each branch line connecting portion 3. The branching line 61 thus branched may be connected to another joint box and then branched again.

5, the housing 1 of the joint box is provided with a base 81 and a cover member 82 having a substantially U-shaped section in cross section, through a mounting member 80, As shown in FIG.

The base 81 is mounted on the housing 1 of the joint box together with the information wiring device 90 having the modular plug insertion port 91a for connecting the signal line and the signal line connection part (not shown) And a fixing piece 84 and a fixing piece 84 which are formed in a substantially elliptical shape in cross section and which are extended from the opposite side edges of the mounting plate 83. [ The fixing piece 84 is formed with a through hole 84a for fixing screw insertion and the base 81 is fixed to the contrasting material by screwing a fixing screw inserted into the insertion hole 84a into the contrasting material.

Screw holes 83a and 83b for screwing the housing 1 of the joint box and the information wiring device 90 are formed in the mounting plate 83. The housing 1 is provided with through holes 22a and 22b And is fastened to the mounting plate 83 by a fixing screw 85 which is inserted into the mounting plate 83. [ Since the stepped portion is formed between the mounting plate 83 and the fixing piece 84, the housing 1 of the joint box and the information wiring device 90 can be mounted at positions higher than the contrasting material. Signal fixing portions 86 and 86 are formed on both sides of the mounting plate 83 corresponding to the information wiring device 90 and the signal wiring fixing portions 86 and 86 are used to fix the information wiring device 90 The signal line can be prevented from deviating. At the two sides of the placement plate 83 other than the two sides of the placement plate 83 on which the fixing pieces 84 are extended, there are provided an engagement click 82b protruding from both sides 82a of the cover 82, A locking piece 83c is formed in which an interlocking hole 83d is formed so as to be capable of engaging.

The cover 82 is formed of a transparent resin and covers the housing 1 and the information wiring device 90 of the joint box by engaging the locking click 82b with the stopper 83d, (Not shown).

(Embodiment 2)

Fig. 13 is an exploded perspective view of the joint box of the present embodiment, and Fig. 14 is an explanatory diagram for explaining the state of use. The same constituent elements as those of the first embodiment are denoted by the same reference numerals, and a description thereof will be omitted.

In this embodiment, the power supply line connecting portion 2 is provided on each of two opposing surfaces in the longitudinal direction of the housing 1, and the power supply line connecting portion 2 is provided with two A pair of branch line connecting portions 3 are disposed. Since the branch line connecting portion 3 is disposed in a direction substantially orthogonal to the power line connecting portion 2, the branch line 61 can be drawn in a direction substantially orthogonal to the power source line 60. [

The body 1a is separated into a central storage space 23 and left and right storage spaces 24a and 24b by two row central partitions 16 and 16 formed along the short side direction of the housing 1. [ do. The terminal accommodating space 23 on the side of the power line connecting portion 2 is divided into three terminal plate water receiving portions 17 by two rows of partition walls 16b formed along the short side direction of the housing 1, And the terminal board 7 is housed in the housing 17. The left storage space 24a and the right storage space 24b on the side of the branch line connection portion 3 are separated into three sets of grooves 29 formed by the partition walls 18 along the longitudinal direction of the housing 1 Female contact pieces 4a to 4c are accommodated in the respective groove portions 29. [

On the other hand, the inner structure of the cover 1b is formed to have substantially the same structure as that of the body 1a. On the surface of the cover 1b, a circuit display portion 41 for displaying the internal circuit of the joint box The power supply line connecting portion 2 and the branch line connecting portion 3 are formed on the upper surface of the insulating substrate 2, It is possible to easily read information required for electric wiring in the display of the circuit display section 41 and the name display sections 42a and 42b.

A substantially circular recessed portion 11 for inserting the power supply line 60 is formed substantially at the center of the power supply line connecting portion 2 so that the recessed portion 11 of the recessed portion 11 Three row of core wire insertion ports 12 are formed in a substantially vertical direction and each core wire insertion port 12 communicates with the terminal plate water receiving portion 17 of the central receiving space 23. The core wire insertion port 12 is formed so as to be thinner at the tip end and the core wire of the power supply wire is securely inserted between the terminal plate 7 and the lock spring 8. [

The branch line connecting portion 3 is formed in a substantially rectangular parallelepiped shape and is fitted in a concave portion (not shown) formed on the front surface of the harness plug 50. Three plug blade insertion openings 19 each having a vertically elongated hole into which a plug blade (not shown) formed in the recessed portion is inserted are formed on the end surface of the branch line connection portion 3, and each plug blade insertion opening 19 Are communicated with the groove 29 of the left and right storage spaces 24a and 24b and three pairs of the arm contact pieces 4a to 4c are accommodated in the groove portions 29 respectively.

Next, the terminal blocks 25a to 25c housed in the central and left and right storage spaces 23, 24a and 24b of the housing 1 will be described below.

The terminal block 25a has a substantially U-shaped conductive arm contact piece 4a and a pair of female contact pieces 4a and 4b with outwardly directed outwardly directed plug- A conductive L-shaped conductive lead plate 5a connecting the lead plate 5a and the terminal plate 7 and a conductive connection plate 7 having a substantially U-shaped cross section opened to the side and a conductive connection And a connecting piece 6 which is a member.

The terminal block 25b has a substantially U-shaped conductive arm contact piece 4b and a pair of female contact pieces 4b and 4b facing outward from the plug receiving portion 26 at both ends, A conductive terminal plate 7 having the same shape as that of the terminal plate 7 of the terminal block 25a and a conductive terminal plate 7 having the same shape as that of the lead plate 5b And a conductive connecting piece 6 for connecting the terminal plate 7 with the conductive connecting piece 6.

The terminal block 25c has a substantially U-shaped conductive arm contact piece 4c and a pair of female contact pieces 4c and 4c facing each other with the plug leg portion 26 outward. A conductive terminal plate 7 having the same shape as that of the terminal plate 7 of the terminal block 25a and a conductive terminal plate 7 having a lead plate 5c and a terminal plate 7) for connecting the conductive connecting piece (6).

Lock springs 8 and 8 are disposed at both ends of the terminal plate 7 of each of the terminal blocks 25a to 25c and fastening terminal portions 28 are formed of the terminal plate 7 and the lock springs 8 and 8 . Here, one of the three sets of quick-release terminal portions 28 is for grounding.

The female contact pieces 4a ..., the lead plates 5a ..., the connecting pieces 6 and the terminal plate 7 are connected to the respective terminal blocks 25a to 25c by two holes, And the respective members are electrically and mechanically connected to each other. Here, the female contact pieces 4a to 4c and the lead pieces 5a to 5c cross each other at different heights, and the terminal blocks 25a to 25c are housed in the housing 1 so as not to contact each other. 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 female contact pieces 4a and 4c of the terminal blocks 25a and 25c are formed in the same shape and can be replaced. That is, since the same member is used as the arm contact pieces 4a and 4c in the forward and backward directions, the kinds of parts can be reduced.

The terminal blocks 25a to 25c are connected before assembly to the body 1a. Assembly of the terminal blocks 25a to 25c in the body 1a is performed in the following procedure. The terminal block 7 is connected to the terminal board housing portion 17 on the left side of the central accommodating space 23 and the female contact pieces 4c and 4c are respectively inserted into the groove portion 24a on the inner side of the left accommodating space 24a, And housed in the groove portion 29 immediately in front of the right accommodating space 24b in the body 1a. Next, the terminal block 25b is connected to the center of the terminal plate water supply portion 17 at the center of the central storage space 23, the center of the left and right storage spaces 24a and 24b, and the terminal plate 7 and the dark contact pieces 4b, In the form of being housed in the groove 29 of the body 1a. Finally, the terminal block 25 is connected to the terminal board housing portion 17 on the right side of the central accommodating space 23 by the terminal block 25a and the female contact pieces 4a and 4a are respectively provided on the right side of the left accommodating space 24a The groove portion 29 of the right housing space 24b and the groove portion 29 of the right housing space 24b. When the terminal blocks 25a to 25c are housed, the lock springs 8 are housed in both ends of the terminal board 7 in advance.

The female contact pieces 4a and 4c are provided with protruding pieces 27 protruding sideways between the plug receiving portion 26 and a portion bridging between the plug receiving portions 26 and 26, A positioning rib for holding the projecting piece 27 at a portion separated in a forked form at its tip end and a supporting rib for supporting a lower surface of the opposite side of the projecting piece 27 from each other, And the groove portions 29 for accommodating the pieces 4a and 4c can be positioned easily with respect to the female contact pieces 4a and 4c.

The cover 1b is mounted in a state in which the terminal blocks 25a to 25c are housed in the body 1a as described above. When the cover 1b is mounted, two release buttons 9 for releasing a core wire resiliently retained between the terminal plate 7 of the quick-release terminal portion 28 and the lock spring 8 are accommodated. Since the operating portion 9a of the release button 9 is disposed on the recess 34 formed in the portion of the cover 1b corresponding to the branch line connection portion 2 and is exposed on the surface of the housing 1, Similarly, by operating the operating portion 9a, it is possible to easily release the elastic locking state of the core wire. Further, since the operating portion 9a is formed to a size that allows hand operation, the core wire can be replaced without using a special tool.

Fig. 14 is an explanatory diagram for explaining the use state of this joint box. Grooves 55a and 55b having substantially the same width and depth are formed in the bottom surface 54, and the grooves 55a and 55b cross at a substantially right angle. The power line connecting portion 2 is directed to the groove 55a in which the power line 60 is disposed and the branch line connecting portion 3 is connected to the groove 55a in which the branch line 61 is provided The branching line connecting portion 3 is formed in a direction substantially perpendicular to the power line connecting portion 2 so that the branching line 61 is drawn in a direction substantially orthogonal to the power line 60 .

(Embodiment 3)

An exploded perspective view of the joint box of this embodiment is shown in Figs. 15 and 16. Fig. Since the basic configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals and the description thereof is omitted.

The housing 1 of the joint box A is formed in a flat rectangular parallelepiped shape. The housing 1 is composed of a body 1a which is a synthetic resin whose upper surface is opened, a cover 1 made of synthetic resin (1b). The insertion hole 21b for inserting the fixed rivet 20 is formed in three places on the upper surface of the cover 1b and the insertion hole 21b is formed in the body 1a in correspondence with the insertion hole 21b and the insertion hole 21b. The cover 1b is fixed to the body 1a by inserting the fixed rivet 20 into the through hole 21b and caulking the tip thereof. A power line connecting portion 2 for connecting a power line is formed on one of the two opposing sides of the housing 1 and a branched connecting portion 3 for branching is formed on the other side. And the branch line connecting portion 3 are formed 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 connecting portion 3 is formed in a direction substantially parallel to the power line connecting portion 2, so that the branching line connected to the branch line connecting portion 3 is connected to the power line connected to the power line connecting portion 2 And can be drawn in a substantially parallel direction.

The interior of the body 1a is separated into the left and right storage spaces by the partition walls 16 and the storage space 23 'on the power line connection unit 2 side is divided into three storage spaces (17). The storage space 24 on the side of the branch line connection portion 3 is divided into three storage spaces by two rows of partition walls 16d and 16e, leaving 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 bored in a substantially central portion of the body 1a and a through hole 22b is formed in a portion of the cover 1b corresponding to the through hole 22a And the housing 1 can be mounted to the contrasting member using a fixing member (not shown) such as a screw inserted into the through holes 22a, 22b. The internal structure of the cover 1b is formed to be substantially the same as the internal structure of the body 1a, though not shown.

The terminal blocks 25a to 25c housed in the housing 1 will be described below.

The terminal block 25a is provided with a terminal plate 7a formed in a substantially U shape opening to one side and a plug bearing portion 26 formed at both ends of the terminal block 25a, A lead plate 5a for connecting the terminal plate 7a and the branching terminal plate 27a to each other and connected to both ends of the terminal plate 7a; ).

The terminal block 25b has a terminal plate 7b having the same shape as that of the terminal plate 7a of the terminal block 5a and a plug receiving portion 26 formed at both ends of the terminal block 5a, A lead plate 5b for connecting the terminal plate 7b and the branching terminal plate 27b to each other and connected to the terminal board 7b by two lock springs 8).

The terminal block 25c includes a terminal plate 7c having the same shape as that of the terminal plate 7a of the terminal block 5a and a plug receiving portion 26 formed at both ends of the terminal block 5a, A branching terminal plate 27c connected to the connecting piece 31c bent at a substantially right angle at a central portion in a direction opposite to that of the terminal plate 7a and the lead plate 5c connecting the terminal plate 7c and the branching terminal plate 27c, And a lock spring 8 housed in both ends of the terminal board 7c.

A fitting pin is formed at a proper position of each of the terminal plates 7a to 7c and the branching terminal plates 27a to 27c of the terminal blocks 25a to 25c and is inserted into a hole of a mounting hole formed at both ends of the lead plates 5a to 5c The fitting pins are caulked to connect the terminal plates 7a to 7c and the branching terminal plates 27a to 27c of the corresponding terminal blocks, respectively. The branching terminal plates 27a and 27c of the terminal blocks 25a and 25c are formed in the same shape and the branching terminal plates 27a and 27c are replaceable. ) As a common part to reduce the number of parts.

The connection between the terminal plates 7a to 7c and the branching terminal plates 27a to 27c is made before assembling to the body 1a. Assembly of the terminal blocks 25a to 25c in the body 1a is carried out in such a manner that the terminal board 7c is stored in the storage space 17 closest to the partition wall 16 of the storage space 23 ' The terminal block 25b is housed in the body 10 in such a manner that the terminal block 25b is housed in the housing space 17 at the center and then the terminal block 7b is housed in the housing space 17 at the center, And the terminal block 25a is housed in a form of housing the terminal plate 7a. In such a state that the terminal blocks 25a to 25c are housed, the lead plates 5a to 5c are formed so as not to contact each other. When the terminal blocks 25a to 25c are housed in the body 1a, the lock springs 8 are previously stored in both ends of the terminal plates 7a to 7c.

In this manner, the cover 1b is placed on the upper surface of the body 1a while the terminal blocks 25a to 25c are housed in the body 1a. When the cover 1b is mounted, a release button 9 for releasing the quick-release terminal portion 28 composed of the terminal plates 25a to 25c and the lock spring 8 is inserted into the corresponding portion . The releasing button 9 simultaneously releases the connection state of the core wire by the three sets of lock springs 8 of each power line connecting portion 2. The operating portion 9a of the releasing button 9 is operated And the operating portion 9a of the releasing button 9 is disposed in the concave portion 34 formed in the portion of the cover 1b corresponding to the power line connecting portion 2 so as to be exposed to the surface of the cover 1b The connection state of the core wire can be released by hand operation without using a special tool.

Like the first embodiment, the circuit display portion 41 and the name display portions 42a and 42b are formed on the surface of the cover 1b. The name display portions 42a and 42b include a recess 43 formed in the cover 1b and a card 44 accommodated in the recess 43 described in the name, The cover 45 is formed by covering the card 44 stored in the concave portion 43 with the concave portion 45a protruding from the both ends of the concave portion 45a, The display of the card 44 can be read through the cover 45 and the use of the power line connecting portion 2 and the branch line connecting portion 3 can be easily carried out in the display of the card 45 Can be distinguished.

According to the invention of claim 1 in order to achieve the above object, it forms a display section that displays information required for the electric wiring on the surface of the housing, it is possible to read out the information required for the electric wiring on the display of the display, reverse insertion or rating or It is possible to prevent connection of harness plugs different in use from each other , as well as to improve workability of wiring work.

According to the invention of claim 4 or 5, there is an effect that the branch line can be drawn in a direction substantially parallel to the power line.

According to the invention of claim 6 or 7, there is an effect that the branch line can be drawn in a direction substantially perpendicular to the power line.

According to the invention of claim 8, there is an effect that the harness plug can be prevented from being separated by engaging the click and the groove of the harness plug.

According to the invention of claim 10, since the second dustproof cover is fitted to the electric wire insertion hole of the power line connecting portion, there is an effect that dust or the like can be prevented from intruding into the housing from the electric wire inserting opening when not in use .

According to the invention of claim 11, since the operating portion of the release button is exposed on the surface of the housing, there is an effect that the connection state of the electric wire can be easily released by operating the operation portion of the release button.

According to the invention of claim 12, there is an effect that the connection state of the electric wire can be released without using a special tool.

According to the thirteenth aspect of the present invention, there is an effect that the connecting state between the quick-connect terminal portion and the electric wire can be released with a small operation force by the principle of the lever.

According to the invention of claim 14, the wiring between the terminal board and the plug bladder is eliminated, and the labor of the internal wiring can be eliminated, and the number of boom boom can be reduced.

According to the invention of claim 15 or 16, there is an effect that the branch line can be drawn in a direction substantially parallel to the power line.

According to the invention of claim 17 or 18, there is an effect that the branching line can be drawn in a direction substantially orthogonal to the power line.

According to the invention of claim 19, there is an effect that the harness plug can be prevented from being separated by engaging the click and the groove of the harness plug.

According to the twentieth aspect of the present invention, there is provided an effect that reverse connection, harness plugs of different ratings and uses are not connected, and erroneous connection can be prevented.

The invention of claim 21 has an effect that it is possible to prevent dust or the like from entering the inside of the housing from the wire insertion port when not in use.

Claims (18)

A display unit for displaying information necessary for electric wiring, a name, and an internal circuit diagram is formed on the surface of the housing, and a joint box having a wrong connection preventing part for preventing reverse connection or connection of harness plugs having different ratings and uses In this case, A power line connecting portion formed at the center of two opposite sides of a flat rectangular parallelepiped housing and having a quick-connect terminal portion for sandwiching a core wire of the power line between the terminal plate and the lock spring; And a plug-inserting portion which is provided in both housings of the power-source line connecting portion and which is electrically connected to the power-source line connecting portion and which is inserted into a concave portion formed on a front surface of the harness plug to insert a plug- A branch line connecting portion formed on the front surface and holding the plug blade in an internal plug-receiving portion; And the joint box . The joint box according to claim 1, wherein the branch line connecting portion is formed in a direction parallel to the power line connecting portion. The power supply apparatus according to claim 1, wherein the power supply line connecting portion is formed at a center of two opposite surfaces in the longitudinal direction of the rectangular parallelepiped housing, Wherein the joint box is formed as a pair. The joint box according to claim 1, wherein the branch line connecting portion is formed in a direction orthogonal to the power line connecting portion. The power supply apparatus according to claim 1, wherein the power supply line connecting portion is formed at a center of two opposite surfaces in the longitudinal direction of the rectangular parallelepiped housing, and the branch line connecting portion has a pair of opposed two surfaces connecting the two surfaces of the housing And the joint box is formed. 2. The joint box according to claim 1, wherein a groove for engaging and disengaging the detachment-preventing click formed on the harness plug so as to engage or disengage is formed on a side surface of the branch line connecting portion. The joint box according to claim 1, further comprising a second dust cover covering the electric wire insertion port of the power line connecting portion. A power line connecting portion including a fastening terminal portion for sandwiching a core wire of a power source line between a terminal plate and a lock spring; and a power line connecting portion electrically connected to the power line connecting portion, and fitted into a concave portion formed on a front surface of the harness plug, A plug-blade insertion port for inserting a protruding plug blade is formed on the front surface, a branch-line connection portion for holding the plug blade in the plug-in support portion is provided in the housing, Wherein the button is rotatably disposed at a portion of the power line connection portion corresponding to the lock spring, so that the operation portion of the release button is exposed on the surface of the housing. 9. The joint box according to claim 8, wherein the operating portion of the release button is formed to a size that enables manual operation. 9. The apparatus according to claim 8, wherein the release button has a fulcrum projection engaging with an engaging element formed in an inner circumferential surface of the housing, and a pressing protrusion contacting the lock spring, And the pressing projection presses the lock spring in a direction in which the lock spring separates from the terminal plate. The joint box according to claim 8, wherein a connection member for electrically connecting the terminal plate of the power line connecting portion and the plug receiving portion of the branch line connecting portion is housed in the housing. The joint box according to claim 8, wherein the branch line connecting portion is formed in a direction parallel to the power line connecting portion. 9. The power line connector according to claim 8, wherein the power line connecting portions are respectively formed at the center of two opposing surfaces in the longitudinal direction of the rectangular parallelepiped housing, and the branch line connecting portions are formed at both sides of the power line connecting portion formed at the center of two sides of the housing, Wherein the joint box is formed as a pair. The joint box according to claim 8, wherein the branch line connecting portion is formed in a direction orthogonal to the power line connecting portion. 9. The power supply apparatus according to claim 8, wherein the power supply line connecting portions are respectively formed at the center of two opposite surfaces in the longitudinal direction of the rectangular parallelepiped housing, and the branch line connecting portions are formed by two pairs of opposing two surfaces connecting the two surfaces of the housing And the joint box is formed. 9. The joint box according to claim 8, wherein a groove for engaging with an escape prevention click formed on the harness plug so as to engage or disengage is formed on a side surface of the branch line connecting portion. The joint box according to claim 8, further comprising a mis-connection preventing portion for preventing reverse insertion or connection of harness plugs of different ratings or uses to the side surface of the branch line connection portion. The joint box according to claim 8, further comprising a second dust cover covering the electric wire insertion hole of the power line connecting portion.