JP2901130B2 - Fixing structure of electric wire connected to branch connection sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure for fixing a wire connected to a branch connection sheet to a case which is folded and stored in a branch connection sheet used as a part of a wire harness of an automobile. .

[0002]

2. Description of the Related Art Conventional wire harnesses employ a system in which a basic wire is first wired, and a branch sub-wire is branched and connected to the basic wire. 2. Description of the Related Art In recent years, in order to highly pursue performance such as comfort and safety of a vehicle, various parts have been increased, and accordingly, the number of electric circuits including relays, fuses, and the like has been significantly increased.

[0003] Therefore, in the wiring configuration in which the sub-wires are branched and connected to the core wires, enlargement and complication of the wire harness are inevitable. However, there is a drawback in that it is extremely difficult to perform maintenance and management such as search and repair when a trouble or the like occurs.

On the other hand, in an attempt to solve the above-mentioned drawbacks, Japanese Patent Application Laid-Open No. 2-219413 has proposed an electric junction box J as shown in FIG. The electric connection box J is divided into a plurality of wiring cases a, and in each wiring case a, after connecting to the sub-wire b and the short bar c, respectively, these wiring cases a are laminated, and the laminated wiring is formed. Unit d for connecting the short bars c of the case a
Is used to make predetermined sub-wires b conductive to form an entire circuit.

[0005]

However, since the electric connection box J uses the short bar c and the connection unit d as described above, the number of parts other than the wiring case a is large, and workability is increased. Has the drawback of deteriorating the reliability as well as the reliability. To eliminate such disadvantages,
It is conceivable to use a branch connection sheet for a part of the internal circuit of the electric connection box. This branch connection sheet, a plurality of branch wires for the trunk wire arranged on the sheet, for each branch circuit, that is, for each sub-harness to which one connector is mounted,
They are arranged in a substantially orthogonal direction and are permanently connected by thermocompression bonding, ultrasonic waves, or the like, or are formed by mechanical connection using pressure contact terminals. Then, the sheet is folded for each branch circuit and stored in the case of the electric connection box.

[0006] However, there is a problem in that the branch wire branched from the branch connection sheet has a possibility of being broken by an external force because the strength of the connection portion is weak.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and a plurality of trunk wires arranged side by side on a seat are provided with a plurality of wires. Branch wires are aggregated for each branch circuit and arranged in a nearly orthogonal direction.
A branch connection sheet formed by connecting the plurality of branch wires, a U-shaped fixing frame and a fixing bar for fixing the plurality of branch wires, the plurality of trunk wires are folded back for each branch circuit, and the sheet and the plurality of branch wires are provided. An electric wire is superimposed on each branch circuit, the fixing frame has an arm side at both ends of a center side, and the fixing bar has holes at both ends thereof through which the arm sides penetrate, and is connected to the branch connection sheet. The plurality of branch wires are held and fixed between the center side of the fixed frame and the fixed bar penetrated through the arm sides at both ends or between the fixed bar and the fixed bar for each of the branch circuits. It is characterized by having been done.

It is preferable that the fixing bar and the fixing frame are provided with a locking claw and a wavy projection which engages with the locking claw. The branch connection sheet is accommodated in a folded state in a case of an electric connection box, and a fixed frame is locked to the case (claim 3). Then, the trunk wire of the branch connection sheet is connected to the circuit conductor in the electric connection box (claim 4).

[0009]

According to the first aspect of the present invention, the branch electric wires are collected and fixed between the U-shaped fixing frame and the fixing bar for each of the branch circuits (that is, for each connector). Even if an external force such as tension acts on the branch wire, it does not directly affect the connection with the main wire. According to claim 2,
Since the fixing bar and the fixing frame are locked, the fixing of the branch wire is stabilized. Further, since the fixing frame is locked to the case of the electric connection box, the branch wire is fixed to the case after all (claim 3). Then, by connecting the trunk wire to the circuit conductor in the electric connection box as in claim 4, the configuration of the internal circuit of the electric connection box becomes easy.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Branch connection sheet 1 according to this embodiment
Are stored in an electric connection box 3 composed of an upper case 5 and a lower case 7. On the upper surface of the upper case 5, electric components such as the female connector 9 and the fuse cavity 11 are provided.
The mating male connector 13 is fitted to the female connector 9. On the lower surface of the upper case 5, a busbar wiring board (not shown) composed of a plurality of busbars formed by punching and bending a conductive metal plate and its insulating substrate is accommodated. Are electrically connected to electric components such as the female connector 9 and the fuse cavity 11 and the main wires 15 constituting the branch connection sheet 1.
And are connected by known means such as pressure welding and soldering.

A large number of trunk wires 15 are disposed in each sheet 17 so as to be continuously penetrated in the length direction in a state of being parallel to each other. The sheet 17 is formed of, for example, a flexible electrically insulating synthetic resin film, and
It is cut to a size that can be folded and stored inside, and the main wires 15 are slightly separated from each other for the above-mentioned folding.
The bent portion 19 is left. In addition, this sheet 1
7 may be formed of a thin plate of a synthetic resin.

The trunk wire 15 includes a large number of branch wires 2.
1 are integrated for each branch circuit, that is, connected in units of connectors 23 described later. The branch wires 21 are wired in parallel with each other, are wired in a direction substantially orthogonal to the trunk wire 15, and are connected one by one. Permanent connection by thermocompression bonding or ultrasonic waves or mechanical connection using a press-contact terminal is applied to the connection portion 22. Thereby, each sheet 17 constitutes the branch connection sheet 1. A connector 23 is attached to the end of the branch wire 21 and can be fitted and connected to a mating connector (not shown).

A fixed frame 25 is engaged with an edge of the electric connection box 3. That is, the fixed frame 25 is formed in a U-shape with arm sides 27 provided at both ends of the center side 26,
Is provided on the side surface of the electric connection box 3 on the side from which it is drawn out, and is locked in the concave portion of the electric connection box 3 while straddling the branch wire 21. The concave portions are a groove-shaped first concave portion 29 (FIG. 3) formed on the lower surface of the upper case 5 and two second concave portions 30 formed on both ends of the lower case 7. First recess 29
The central side 26 of the fixed frame 25 is fitted into the
, The tips of both arm sides 27 are fitted.

The fixed frame 25 having one end open in a U-shape is closed by a fixed bar 31. That is, each fixed bar 3
At both ends of 1, holes 33 are formed through which the ends of both sides 27 of the fixed frame 25 penetrate. A lock claw 35 is formed inside the hole 33. The lock claw 35 is provided with a corrugated projection 28 formed outside the arm side 27 of the fixed frame 25.
Then, it can be moved one step at a time with moderation and locked. A groove 37 for reducing the weight is formed in the center of the fixed bar 31.

Next, the operation of fixing the branch electric wire 21 while folding the branch connection sheet 1 in this embodiment will be described with reference to FIG.
And FIG. First, the upper case 5 is turned upside down, and the sheets 17 are sequentially folded from the sheet 17 closest to the upper case 5. At this time, the branch electric wires 21 branched from the respective sheets 17 are put in the U-shaped frame of the fixed frame 25. After inserting the branch electric wires 21 of one sheet 17, the U-shape is closed by the first fixing bar 31. That is, the tip of the arm side 27 of the fixed frame 25 penetrates the holes 33 at both ends of the fixed bar 31, so that the fixed bar 31 clamps and fixes the branch electric wire 21. Next, the second sheet 1
The branch electric wire 21 branching from 7 is put in the fixing frame 25 and is held by the second fixing bar 31.

In this way, the branch wires 21 for each sheet 17 are fixed to the fixed frame 25
Between the fixed side 31 and the fixed bar 31 or between the fixed bar 31 and the fixed bar 31. The fixed frame 25 is formed by the concave portions 29 and 30 (FIG. 3).
Since the electric connection box 3 is locked to the upper case 5 and the lower case 7, the group of branch wires 21 is fixed to the electric connection box 3 after all. The upper case 5 and the lower case 7 are fixed to each other by bolts or the like (not shown).

As described above, according to the fixing structure of the electric wires connected to the branch connection sheet of this embodiment, the branch electric wires 21 are sandwiched and fixed by the fixing means including the fixing frame 25 and the fixing bar 31. Since this fixing means is locked to the electric connection box 3, the branch wire 21 is eventually fixed to the electric connection box 3. Therefore, even when a force such as pulling the branch wire 21 is applied from the outside, the force can be received by the electric junction box 3 via the fixing means, so that the main cable 15
And the connection portion 22 of the branch electric wire 21 is not added. Thereby, it is possible to prevent a failure that a connection portion that is weak to an external force is broken.

In the above embodiment, the branch connection sheet 1
Is made to be folded in units of a plurality of sheets 17 at the bent portion 19, but as in the other embodiment shown in FIG. It can be folded and stored in the electric junction box 3. Further, in the above embodiment, the branch wires 21 fixed by the fixing means are obtained by grouping a plurality of branch wires for each branch circuit and attaching the connector 23 to each terminal (FIG. 1), as shown in FIG. As in other embodiments, all the branch wires 21 may be bundled into one.

[0019]

As described above, according to the fixing structure of the electric wire connected to the branch connection sheet of the present invention, the branch electric wire connected to the branch connection sheet is clamped and fixed between the fixing frame and the fixing bar. It will be fixed to the case. Therefore, even if an external force is applied to the branch wire, the force is received by the case via the fixing frame or the fixing bar, and the force is not applied to the connection part having low strength, and the wire may be disconnected. Is prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a branch wire fixing structure of a branch connection sheet according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an assembling operation of FIG. 1;

FIG. 3 is a side view showing an assembled state of FIG. 2;

FIG. 4 is a perspective view showing a part of another embodiment.

FIG. 5 is an exploded perspective view showing a conventional electric junction box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Branch connection sheet 3 Electric connection box 5 Upper case 7 Lower case 9 Female connector 11 Fuse cavity 13 Male connector 15 Backbone electric wire 17 Sheet 19 Bending part 21 Branch electric wire 22 Connection part 23 Connector 25 Fixed frame 28 Wavy projection 29, 30 Depression 31 Fixing bar 33 hole 35 Lock claw

Claims (4)

(57) [Claims] 1. A branch connection sheet comprising a plurality of branch wires arranged in parallel to a plurality of trunk wires arranged in parallel in a sheet and arranged and connected in a substantially orthogonal direction. A U-shaped fixing frame and a fixing bar for fixing, the plurality of trunk wires are folded back for each branch circuit, and the sheet and the plurality of branch wires are overlapped for each branch circuit, and the fixing frame is In addition to having arm sides at both ends of the central side, the fixing bar has holes at both ends thereof through which the arm sides penetrate, and a plurality of branch wires connected to the branch connection sheet are provided for each of the branch circuits. Fixed between the center side of the fixed frame and the fixed bar penetrated through the arm sides at both ends thereof, or between the fixed bar and the fixed bar, and is fixed to the branch connection sheet. Wire fixing structure. 2. The fixing bar according to claim 1, wherein locking claws are provided in holes at both ends of the fixing bar, and wavy projections engaging with the locking claws are provided on arm sides of both ends of the fixing frame. Fixing structure of electric wire connected to branch connection sheet. 3. The branch connection sheet according to claim 1, wherein the branch connection sheet is housed in a folded state in a case of an electric connection box, and the fixed frame is locked to the case. Fixed structure of the electric wire to be connected. 4. The fixing structure of an electric wire connected to a branch connection sheet according to claim 3, wherein the trunk wire of the branch connection sheet is connected to a circuit conductor in an electric connection box.