JP2764039B2 - Branch junction box and method of manufacturing the same - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch junction box and a method of manufacturing the same, and more particularly, to a branch junction box in which a bridge bus bar is used as a bus bar in an in-car wiring of an automobile. and Ru der manufacturing method thereof. 2. Description of the Related Art In-machine wiring of automobiles and the like is becoming complicated due to addition of new functions, and functional parts are concentrated in terms of simplification and improvement of reliability, and wiring in the middle of electric wires is performed. Elimination of branches has been performed. The inside of this branch connection box forms a circuit with a metal stamping plate called a bus bar. FIG. 5 shows an example of an external view of the branch junction box. FIG. 6 shows a bus bar and an insulating plate therein. The bus bar is usually assembled in a plurality of layers via the insulating plate, and the inside of the casing shown in FIG. Is stored in. Note that in these figures,
1, 32, etc. are bus bars, 20 is an insulating plate, 1 is a casing, 4 is a connector terminal for exposing the bus bar terminal 10 from the casing, 6 is a terminal hole, 7 is a fuse holder, 8 is a relay holder, 9, Reference numeral 91 denotes a connector, and 13 denotes an insulated wire. [0004] As shown in FIG. 7, a bridge bus bar (bus bar 3) is provided on the bus bar as shown in FIG.
0, 31, 32, etc. are integrated by the bridge 5) (for example, see also Japanese Patent Application Laid-Open No. 55-141909), and the bridge 5 is cut after being attached to the insulating plate 20. . Therefore, the insulating plate 20 has a bridge cut (cutting) hole 12 as shown in FIGS. Also, as shown in FIGS. 8 to 11, a fitting groove 11 is provided in the insulating plate so that the bus bars 30, 31 and the like can be integrated well with the insulating plate, and the bus bar may be fitted into this groove. In a branch junction box using this type of bridge bus bar and an insulating plate, as shown in FIGS. 8 to 11 (FIGS. 8 and 9 are diagrams before bridge cut, and FIGS. 10 and 11 are diagrams after bridge cut). The bridge 5
The part to be inserted is the hole 1 of the insulating plate inserted between each layer of the bus bar.
In the middle of the place where 2 is open, each layer is cut and the remaining part is intact, so the insulation between the bus bars is only air insulation, due to the movement of chips or the presence of edge burrs due to cutting, etc. There is a possibility that an accident such as a short circuit between the bus bars may occur. In these figures, reference numeral 20 denotes an insulating plate of one layer, 200 denotes an insulating plate of another layer, and 300 and 30.
1 etc. are busbars of another one layer. [0006] The present invention in view of the above [0005] are, no risk of a short circuit Internal wiring circuit such car, can check a cut forgetting Matabu ridge, further <br/> also An object of the present invention is to provide a branch junction box that can improve assemblability and a method of manufacturing the same. A branch connection box according to the present invention comprises a bus bar formed by punching a metal plate formed by intensively arranging a branch circuit in an in-vehicle wiring of an automobile, and the bus bar. Is placed on one side, and these pairs are paired, or if one pair or two or more pairs
Two or more pairs of busbars on the same side
A casing formed by housing the assembled bus bar and the insulating plate and exposing terminals formed on the bus bar terminal to the outside, wherein the bus bar is integrated with a bridge connecting the bus bars themselves to each other. In the branch junction box formed by cutting the bridge located in the relevant portion through the bridge cut hole provided on the insulating plate after being assembled to the insulating plate, the bridge cut provided on the insulating plate Adjacent directly above and between the ends of the bridge that protrudes into the hole and is cut
Is characterized by having an insulating plate or an insulating partition protruding from a casing immediately below . Further, the method of manufacturing the branch junction box according to the present invention is characterized in that a bus bar formed by punching a metal plate formed by intensively arranging a branch circuit in an in-vehicle wiring of an automobile, and that these bus bars are formed on one side. When one or two or more pairs of insulating plates are placed
Side to be placed in the bus bar becomes flush side 2 pairs or more
The upper part is a bridge that connects the bus bars themselves to each other in the manufacture of a branch connection box comprising a casing formed by housing the assembled bus bar and the insulating plate and exposing terminals formed on the bus bar terminals to the outside. After assembling the integrated busbar on the insulating plate, locating the bridge across the bridge cut hole of the insulating plate and assembling, cut the bridge located in that portion via the bridge cut hole, An insulating strip projecting from an adjacent insulating plate or casing immediately above or below is protruded into the bridge cutting hole and provided between both ends of the cut bridge. The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a main portion inside a branch junction box of the present invention, and FIG. 2 is a cross-sectional view taken along line CC of FIG. In these figures, 20
Is an insulating plate of one layer, 30 and 31 are bus bars of one layer, 12 is a hole, 11 is a fitting groove, 200 and 2000 are insulating plates of the other layers, and 15 is an insulating plate, for example, a convex insulating member. The sex thresholds, 300, 301, etc. indicate busbars of another layer, and 51 indicates a cut bridge end. That is, in the present invention, the bridge bus bar is used, the insulating plate is used, and the bridge of the bus bar is cut at the hole 12 of the insulating plate.
That the bus bar is placed and placed on one side of the insulating plate
The bus bar is on the same side of the insulating plate (the bus bar is
This is the same as the conventional case, but the insulating plate immediately below between the two ends 51, 51 of the cut bridge such as the bus bar 30, 31, etc. of one layer, for example, 200
An insulating gap 15 protruding from is positioned and assembled.
Therefore, according to the present invention, both ends of the cut bridge are not insulated by air but are insulated by a solid insulator. In addition, the insulating gap protruding from the adjacent insulating plate may be formed not only from the insulating plate immediately below as shown in FIGS. 1 and 2 but also from the insulating plate 2000 directly above as shown in FIG. 3 or from the casing. (In this case, for example, the insulating plate 2000 of FIG.
Becomes). Further, as shown in FIG. 4, a concave portion 14 may be provided on another insulating plate or casing facing the projecting insulation layer to achieve more complete insulation. According to the present invention as described above, the following effects can be obtained. The branch junction box of the present application is as follows: (1) Insulation between the bridge-cut bus bars is insulated by a solid insulator. Therefore, the short circuit of the bus bar circuit due to the movement of the swarf after the cutting or the edge burr can be prevented. (2) In addition, since production having the following advantages is enabled, the productivity is improved and the product is inexpensive. Branch junction box
If the bridge cut is forgotten in the manufacture of the product, it is impossible to assemble the bus bar, the insulating plate, the casing, or the like in a normal state. Therefore, it is possible to detect the forgetting to cut the bridge. By providing the and has holes for the bridge cutting position together directly above or below the insulating plate or the casing adjacent the insulating partition, enhancing the assemblability by a combination of the insulating partition and bridge cutting hole (positioning) Can be done. Method for producing a branch joint box of the present application, a bus bar to the normal state in the case of (1) the bridge cut forget
-Cannot assemble the insulating plate or casing. Obedience
Can be detected to prevent forgetting to cut the bridge. (2) Insulating plate just above or immediately below the insulation
Is integrated with the casing and has a bridge cut hole.
Position, the insulation gap and bridge
Improve the assemblability by combining (position alignment)
Can be done. (3) In addition, the product has the following advantages,
Enables the production of quality products. Bridge-cut bus
The insulation between the bars is insulated by a solid insulator. Obedience
Of swarf after cutting or edge burr
Can prevent a short circuit of the bus bar circuit .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view for explaining an assembled state of a bus bar and an insulating plate, which are main parts thereof, for explaining the present invention. FIG. 2 is a sectional view taken along line CC of FIG. FIG. 3 is a view showing another example of the present invention and corresponds to FIG. 2; FIG. 4 is a view showing still another example of the present invention and corresponds to FIG. 2; FIG. 5 is an external perspective view of a branch junction box. FIG. 6 is an assembled plan view of a bus bar and an insulating plate housed in a casing in FIG. 5; FIG. 7 is a perspective view of a bridge bus bar. FIG. 8 is a perspective view before a bridge cut for explaining the assembly of a bridge bus bar and an insulating plate. 9 is a sectional view taken along line AA of FIG. FIG. 10 is a perspective view after bridge cutting for explaining assembly of a bridge bus bar and an insulating plate. FIG. 11 is a sectional view taken along line BB of FIG. 10; [Description of Signs] 1 Casing 4 Connector terminal 5 Bridge 6 Terminal hole 10 Busbar terminal 12 Bridge cut (cutting) hole 13 Insulated wire 14 Concave 15 Insulation gap 20 Insulating plate 30 Busbar 31 Busbar 32 Busbar 51 Cut Bridge end 200 insulating plate 300 bus bar 301 bus bar 2000 insulating plate

   ────────────────────────────────────────────────── ─── Continuation of front page                   (56) References JP-A-55-141909 (JP, A)                 JP-A-55-139779 (JP, A)                 Showa 55-61979 (JP, U)

Claims (1)

(57) [Claims] A bus bar formed by punching a metal plate formed by intensively arranging branch circuits in an in-vehicle wiring of an automobile, an insulating plate having these bus bars mounted on one side, and a pair of these. but or two or more pairs of the
Two or more pairs of busbars on the same side
A casing formed by housing the assembled bus bar and the insulating plate and exposing terminals formed on the bus bar terminal to the outside, wherein the bus bar is integrated with a bridge connecting the bus bars themselves to each other. In the branch junction box formed by cutting the bridge located in the relevant portion through the bridge cut hole provided on the insulating plate after being assembled to the insulating plate, the bridge cut provided on the insulating plate Adjacent directly above and between the ends of the bridge that protrudes into the hole and is cut
Is a branch junction box provided with an insulating plate protruding from an insulating plate or a casing immediately below . 2. And the bus bar formed by punching from a metal plate made by handling a branch circuit that is in Internal wiring of the motor vehicle centrally, an insulating plate made by location mounting the bus bars on one side, so that these pairs, a pair Or if more than one pair
Two or more pairs of busbars on the same side
However, in the manufacture of a branch junction box comprising a casing formed by housing an assembled bus bar and an insulating plate and exposing terminals formed on a bus bar terminal to the outside, a bridge connecting the bus bar itself to one another is integrated. and a bus bar insulation plates become a state, the bridge cutting bridge is located in the portion via a bridge after assembling by positioning over the portion of the hole for cutting, bridge cutting hole of the insulating plate, adjacent A method for manufacturing a branch junction box, comprising: projecting an insulating strip projecting from an insulating plate or a casing directly above or below a casing into a bridge-cut hole and interposing the insulating strip between both ends of the cut bridge.