JPH1080039A - Electrical connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct the connection of a fusible link(FL) and the fixing of a junction block(J/B), etc., simultaneously. SOLUTION: This electrical connection box consists of a J/B body 5 which connects an FL2 to a bus bar 19, a J/B bottom cover 6 and a lower casing 9. A first screw stand 16 of a pillar shape is provided on the lower casing 9 and first guiding holes 48, 59 are provided on the bottom cover 6 and the J/B body 5. Then, the bus bar 19 is fixed with a screw to the first screw stand 16 inserted into the first guiding holes. Second screw stands 46, 47 of a pillar shape are provided on the bottom cover 6 and second guiding holes 60, 61 are provided on the J/B body 5. Then, the FL2 and the bus bar 19 are jointed and fixed to the second screw stands inserted into the second guiding holes. A connector block 8 having connector parts 27 to 31 which can enter the J/B body 5 is arranged between the lower casing 9 and the bottom cover 6. A first guiding hole 33 is provided on the block 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In the present invention, a junction block or a connector block is guided by a bolt pedestal of a lower case and overlapped with each other, and connection of a fusible link and fixing of a junction block or the like are simultaneously performed on the bolt pedestal. It relates to an electrical junction box.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show a conventional electric junction box described in Japanese Utility Model Laid-Open No. 5-43717.
As shown in FIG. 7, the electric connection box 91 includes a case 92 made of synthetic resin, a junction block (J / B) 93 and a fusible link block (FL / B) 94 assembled in the case 92. .

In the case 92, a column 96 having a bolt 95 at its tip is erected. The J / B 93 has a rectangular thin base 9 having an insertion hole 97 for the bolt 95.
8 are formed. The FL / B 94 has an insertion hole 99 for a bolt 95, and a rectangular fixing plate 100 facing the pedestal 98 is formed so as to protrude horizontally from a side end.

A relay and a fuse are mounted on the J / B 93, and a fusible link (FL) 101 for a power line is mounted on the FL / B 94 as shown in FIG. The FL10
1 is connected by tightening the terminal portion 102 to a power supply line 104 with a bolt 103.

Then, the bolt 95 of the support 96 is inserted into the bolt hole 97 of the pedestal 98 of the J / B 91, and the FL / B 94
Is fixed on the pedestal 98, and the bolt holes 97,
J / B 93 and FL / B 94 are connected to case 9 by inserting bolt 95 into nut 99 and tightening with nut 105.
2 are fixed in parallel.

[0006]

However, in the above-mentioned conventional structure, there is a problem that the electric junction box 91 is enlarged in the lateral direction because the J / B 93 and the FL / B 94 are assembled in parallel. Was. Further, since the J / B 93 and the FL / B 94 are supported by the bolts 95 by the thin base 98 and the fixing plate 100, there is a concern that the mounting strength is weak. In addition, fusible link 1 for maintenance etc.
When replacing 01, the bolt 103 (FIG. 8) must be removed to remove the power supply line 104, or the nut 105 (FIG. 7) must be removed to remove the FL / B 94. Work was difficult.

[0007] In view of the above, the present invention provides a J / B and F
An electrical connection that can prevent enlargement when other blocks such as L / B are assembled, can firmly fix the J / B to other blocks, and can improve workability when exchanging fusible links, etc. The purpose is to provide boxes.

[0008]

In order to achieve the above object, the present invention provides a J / B body for connecting a fusible link to a bus bar, a J / B bottom cover joined to the J / B body, In an electric connection box having a lower case fitted to the bottom of the J / B main body, a first screw pedestal having a column shape is erected on the lower case, and the J / B main body is connected to the J / B bottom cover and the J / B main body. ,
Basically, a first guide hole for the first screw pedestal is provided, and the bus bar is screw-fixed to the first screw pedestal inserted in the first guide hole. A column-shaped second screw pedestal is erected on the J / B bottom cover, a second guide hole for the second screw pedestal is provided in the J / B body, and a second screw pedestal inserted into the second guide hole is provided. In addition, a structure in which the fusible link and the bus bar are joined and fixed is also effective. Also,
A connector block having a connector portion that can enter the J / B body is disposed between the lower case and the J / B bottom cover, and the connector block has a first guide hole for the first screw base. The provided structure is also effective.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of an embodiment of the present invention will be described in detail. FIG. 1 shows an embodiment of the electric junction box according to the present invention. The electric connection box 1 includes fusible links (FL) 2 and 3, a fuse 4 and a relay 79.
And the like, a junction block body (J / B body) 5, a J / B bottom cover 6 attached to the bottom of the J / B body 5, and a J / B body 5 through the J / B bottom cover 6. Connector block (or relay block) 8
And a lower case 9 that accommodates the connector block 8 and fits on the lower side of the J / B main body 5.

The J / B body 5 and the J / B bottom cover 6 constitute a junction block (J / B) 7. Then, the connector block 8 and the J / B 7 are superimposed on and integrated with the lower case 9 in this order.

The lower case 9 is made of a synthetic resin and has a bottom wall 10, front and rear left and right side walls 10 to 14, and an upper opening 15. The bottom wall 10 is provided with a rectangular column-shaped bolt pedestal (first screw pedestal) 16 for positioning and guiding the connector block 8, the J / B bottom cover 6, and the J / B main body 5. In the center of the tip surface 17 of the bolt base 16, J / B
Fusible link for power supply (FL for power supply) 2 on main unit 5 side
To the bus bar 19, and the connector block 8 and J
One bolt (screw member) 18 for firmly fixing the / B bottom cover 6 and the J / B main body 5 is provided upright.

Also, left and right side walls 11, 1 of the lower cover 9 are provided.
2, a pair of guide rails 20 each having a substantially L-shaped cross section for guiding and locking the connector block 8 and the J / B body 5, and a member located at the upper center of the pair of guide rails 20. A stop projection 21 is formed. In FIG. 1, the guide rail 20 and the locking projection 21 are located on the side
It is also formed inside. Outside this side wall 12,
A bracket 22 for fixing to a vehicle body panel (not shown) or the like is formed. An opening 24 for inserting the wire harness 23 of the connector block 8 is formed in the rear side wall 14.

The connector block 8 includes a board portion 26 made of synthetic resin and various connector portions 2 erected on the board portion 26.
7 to 31. A rectangular guide hole (first guide hole) 33 for the bolt base 16 of the lower case 9 is formed in the substrate portion 26. The guide hole 33 is formed slightly wider than the bolt base 16. The board part 26
A pair of slide engagement portions 34 for the guide rail 20 of the lower case 9 are provided at the left and right ends of the lower case 9. The slide engaging portion 34 is composed of a central column 35 and a pair of ridges 36 projecting from both sides of the column 35.

The connector section 27 is combined with the connector section 37 on the J / B main body 5 side to form each connector. A relay 79 is connected to the connectors (27, 37). Also,
The connector 30 is connected to the fusible link (FL) 3 on the J / B main body side, and the connector 31 is connected to the fuse 4. The connector sections 28 and 29 are covered with connector cases 38 and 39 on the J / B bottom cover 6 side. These connector connection structures are proposed separately.

An electric wire 40 connected to a terminal (not shown) in each of the connector portions 27 to 31 is bundled as a wire harness 23 and led out from below the substrate portion 26 to the rear. A power supply line 41 for connection to the power supply FL 2 on the J / B main body 5 side is bundled together with the wire harness 23. A plate-like terminal 42 is crimped to the end of the power supply line 41. The terminal 42 has an insertion hole 43 for the bolt 18.
have.

The connector block 8 has a J / B bottom cover 6
Join. The J / B bottom cover 6 is made of a synthetic resin, and has a substrate 45 for closing the lower side of the J / B main body 5 and the connector cases 38 and 39 formed integrally with the substrate 45.
And a pair of rectangular column-shaped nut pedestals (second screw pedestals) 46 and 47 erected on the substrate portion 45.

The board portion 45 has a rectangular guide hole (second guide hole) 48 for the bolt pedestal 16 of the lower case 9.
And insertion holes 49 to 51 of various shapes for the respective connector portions 27 to 31 of the connector block 8 are formed.
The pair of nut pedestals 46 and 47 are arranged in parallel. One nut pedestal 46 is adjacent to the guide hole 48, and the other nut pedestal 47 is located away from the guide hole 48. Metal nuts (screw members) 52 and 53 are embedded and fixed to the distal ends of the nut pedestals 46 and 47, respectively. The nuts 52 and 53 are exposed on the tip surfaces (upper surfaces) 54 and 55 of the pedestals 46 and 47. A frame portion 56 is formed around the substrate portion 45, and the frame portion 56 is provided with a locking projection 57 that engages with the bottom of the J / B body 5.

The J / B main body 5 is formed of a synthetic resin into a substantially rectangular box shape, and has a rectangular cylindrical guide hole (first guide hole) 59 in the height direction with respect to the bolt pedestal 16 of the lower case 9.
And a pair of rectangular cylindrical guide holes (second guide holes) 6 for the pair of nut pedestals 46 and 47 of the J / B bottom cover 6.
0 and 61 in parallel. Guide holes 59 to 61
Is constituted by being surrounded on all sides by a peripheral wall 62. A part of the peripheral wall 62 is constituted by left and right side walls 63 and a rear wall 64 of the J / B main body 5. In the peripheral wall (inner wall) 62 of the central guide hole 60,
A locking projection 65 for the bus bar 19 is formed.

A pair of slide engaging portions 66 having a substantially L-shaped cross section with respect to the guide rail 20 of the lower case 9 are provided below the left and right side walls 63 of the J / B body 5. A flexible locking arm 67 located between the parts 66 is provided. The flexible locking arm 67 is attached to the lower case 9.
It has an engagement projection 68 for the engagement projection 21 on the side.

The bus bar 19 is formed in a rectangular shape.
The insertion hole 69 for the bolt 18 of the lower case 9 and the J / B
Bolt insertion hole 7 for one nut 52 of bottom cover 6
0. The distal end of the bus bar 19 is bent downward, and the bent portion 71 is formed with an engagement hole 72 for the locking projection 65 on the J / B main body side.

A hole 75 of one horizontal terminal 73 of the power supply FL 2 is located on the bolt insertion hole 70, and the terminal 73 is connected to the center guide hole 6 by a small bolt 77 through the bus bar 19.
It is tightened and connected to a nut 52 in the center. The other horizontal terminal 74 of the power supply FL 2 is located on the guide hole 61 on the outside, and is fixed to the other nut 53 with a small bolt 78 across an output circuit such as a bus bar (not shown) in the J / B main body 5. Is done.

FIGS. 2 to 6 show a state in which the electric junction box 1 is assembled. First, as shown in FIG.
Of the bolt base 16 in the guide hole 33 of the connector block 8.
To be inserted. Thereby, the connector block 8 in FIG.
Are easily and reliably positioned and mounted on the lower case 9. The slide engagement portion 34 of the connector block 8 slides and engages with the lower half of the guide rail 20 of the lower case 9, and the connector block 8 is located near the bottom of the lower case 9.

The bolt pedestal 16 is formed hollow as shown in FIG. 2, and the head 80 of the bolt 18 is fixed to the tip of the bolt pedestal 16 by molding, for example. As shown in FIG. 3 which is a top view of the engaged state between the bolt base 16 and the connector block 8, the bolt base 16 is engaged with the guide hole 33 of the connector block 8 with a slight gap. This is J
The same applies to the / B bottom cover 6 and the J / B body 5.
3 corresponds to the cross section of the bolt pedestal 16 in FIG.

In the assembling method shown in FIG.
Attach the bottom cover 6 and connect the connector block 8
Then, J / B 7 (J / B body 5 + J / B bottom cover 6) is attached to the lower case 9. The frame 56 of the J / B bottom cover 6 abuts the step 81 on the bottom side of the J / B main body 5, and the tip end surface (upper surface) 54 of the nut pedestal 46 is the upper opening of the guide hole 60, that is, the guide hole peripheral wall 62. It is located at the same height as the upper end face 62a.

The bus bar 19 is routed from above the guide hole 59 to above the nut 52. As shown in FIG. 4, the bolt holes 69 and 70 are located concentrically on the center of the guide hole 59 and on the screw hole of the nut 52. . As shown in FIG. 2, the engagement hole 72 of the bent portion 71 of the bus bar 19 is
Engages. The bolt base 16 is inserted into the guide hole 59. The cross section of J / B7 in FIG. 2 corresponds to the cross section A′-A ′ in FIG.

FIGS. 5 and 6 show the bolt base 16 inserted into the J / B lower cover 8 and the guide holes 48 and 59 of the J / B body 5, ie, the lower case 9 and the connector block 8 are combined with the J / B 7. FIG. The bolt 18 projects upward through a bolt hole 69 of the bus bar 19. Tip surface (upper surface) 1 of bolt base 16
Reference numeral 7 denotes an upper opening of the guide hole 59, that is, a guide hole peripheral wall 62.
The bus bar 19 is positioned at the same height as the upper end surface 62 a of the bolt base 16 in contact with the upper end surface 62 a of the peripheral wall 62 and the front end surface 17 of the bolt base 16. The board portion 26 (FIG. 1) of the connector block 8 is located substantially in contact with the J / B bottom cover 6.

The slide engagement portion 66 of the J / B body 5 in FIG. 1 slides on the upper half of the guide rail 20 of the lower case 9, and the engagement projection 68 of the flexible locking arm 67 is Over the engaging projection 21 and is engaged. By inserting the connector block 8, the J / B bottom cover 6, and the guide holes 33, 48, and 59 of the J / B body 5 into the bolt pedestal 16 of the lower case 9, the assembly of the electric junction box 1 is smoothly and easily performed. It is done reliably. Further, the nut pedestals 46 and 47 of the J / B bottom cover 6 are connected to the guide holes 60 and 61 of the J / B main body 5.
, The assembly of the J / B 7 is performed smoothly.

Then, as shown in FIG. 1, one terminal 73 of the power supply FL 2 is connected to the nut 52 with a bolt 77 together with the bus bar 19.
And the other terminal 74 is fastened to the nut 53 with a bolt 78 via an output circuit (not shown).
Attach the terminal 42 of the power supply line 41 to the bolt 18 of the power supply cable 6 and tighten it with the nut 83 so that the power supply FL 2 and the power supply line 41 are connected, and at the same time, the lower case 9, the connector block 8 and the J / B bottom cover 6 and the J / B main body 5 are firmly fixed by the connection of the bolt 18 and the nut 83 and are integrated. Further, when replacing the power supply FL2 for maintenance or the like, the detachment work can be easily performed by removing the bolts 77 and 78 on the FL side without removing the tightening nut 83 of the power supply line 41.

The bolt pedestal 16 of the lower case 9 is used as a nut pedestal (first screw pedestal), the nut 83 on the bus bar 19 side is used as a bolt, or the nut pedestals 46 and 47 of the J / B bottom cover 6 are used as bolt pedestals. As the (second screw pedestal), the small bolts 77 and 78 on the FL2 side may be small nuts.

[0030]

As described above, according to the present invention, by inserting the first screw pedestal of the lower case through each of the first guide holes of the connector block, the J / B bottom cover, and the J / B body, the connector is provided. Since the block, the lower case, the J / B bottom cover, and the J / B body are positioned and guided smoothly in the overlapping direction, assembling workability is improved. In addition, since the lower case, the connector block, the J / B bottom cover, and the J / B main body are joined in the overlapping direction to form the electric connection box, the electric connection box is prevented from being enlarged in the lateral direction and mounted. Space saving on the side is achieved.

Further, by fixing the bus bar connected to the fusible link to the first screw pedestal together with, for example, a power supply line, the lower case, the connector block, the J / B bottom cover and the fusible link are electrically connected at the same time. Since the fixing to the J / B main body is performed, the assembly workability is also improved thereby. Further, since the connector block, the J / B bottom cover, and the J / B body are fitted to the first screw pedestal with the respective first guide holes fitted together, the fixing strength is increased, and especially the connector block and the J / B are fixed. The electrical connection between the B main body, for example, the electrical connection between the connector portion and the fuse, is reliably performed without play or looseness.

The second screw base of the J / B bottom cover is J
By inserting the J / B bottom cover and the J / B main body by inserting them into the / B main body, the J / B assembling workability is improved. In addition, since the fusible link is fixed to the second screw pedestal via the bus bar, the fusible link can be easily replaced without disconnecting the power line on the first screw pedestal side, and maintenance workability is improved. Is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of an electric junction box according to the present invention.

FIG. 2 is a longitudinal sectional view showing a state where a bolt base of a lower case is inserted into J / B.

FIG. 3 is a top plan view showing the bolt pedestal.

FIG. 4 is a top plan view showing a bus bar on J / B.

FIG. 5 is a longitudinal sectional view showing a state where a bolt pedestal of a lower case is inserted into J / B.

FIG. 6 is a top plan view showing a state where the bolt pedestal is inserted.

FIG. 7 is an exploded perspective view showing a conventional example.

FIG. 8 is a longitudinal sectional view showing a connection state of the FL.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric connection box 2 Fusible link 5 J / B main body 6 J / B bottom cover 8 Connector block 9 Lower case 16 Bolt pedestal (1st screw pedestal) 19 Bus bar 27-31 Connector part 33,48,59 Guide hole (No. One guide hole) 46, 47 Nut seat (second screw seat) 60, 61 Guide hole (second guide hole)

Claims (3)

[Claims] 1. A J / B main body for connecting a fusible link to a bus bar, a J / B bottom cover joined to the J / B main body, and a lower case fitted to the bottom of the J / B main body. In the electrical junction box, a column-shaped first screw pedestal is erected on the lower case, and the J / B bottom cover and the J / B body are
An electric connection box, wherein a first guide hole for the first screw pedestal is provided, and the bus bar is screw-fixed to the first screw pedestal inserted in the first guide hole. 2. A column-shaped second screw pedestal is erected on the J / B bottom cover, and a second guide hole for the second screw pedestal is provided in the J / B body, and inserted into the second guide hole. The electric connection box according to claim 1, wherein the fusible link and the bus bar are joined and fixed to the second screw pedestal. 3. A connector block having a connector portion which can enter into the J / B main body is disposed between the lower case and the J / B bottom cover. The electric connection box according to claim 1 or 2, wherein a first guide hole is provided.