JP2709434B2 - Derivation method of branch wire of wire harness - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for deriving a branch wire from within a wire protection protector, and more particularly, to accurately and efficiently measure the length of a branch length from a wire bundle main body and tape a wire. The present invention relates to a method for deriving a branch wire of a wire harness.

[0002]

2. Description of the Related Art In recent years, as shown in instruments such as automobiles, the use of electronics has progressed, and the amount of wiring has inevitably increased. In consideration of the workability of the wiring manufacturing process and the like, a wire harness (braided wire) is integrally bundled and routed to an automobile or the like. Moreover, this wire harness is formed by a protective member called a protector in accordance with a wiring route, and branch wires are led out from the protector as necessary and wired to each electric device.

Hereinafter, a conventional method for deriving a branch wire of a wire harness will be described with reference to FIGS. 4 and 5. FIG. FIG. 4 is a perspective view of a main part of a conventionally used protector body.
FIG. 5 is a perspective view of a state where the wire harness is assembled to the protector. As shown in FIG.
The cover 6 is openably and closably provided on the protector main body 2 that accommodates the trunk line portion 4 and a notch 13 is provided on the side wall 2a of the protector main body 2 so that the branch wire 3 is led out from the notch 13 so as to be detachable. A positioning cover 14 is provided.

[0005] As shown in FIG. 5, the trunk line portion 4 of the wire harness is housed in the protector body 2, and after the branch line portion 3 is led out from the notch portion 13, the positioning cover 14 is closed and fixed by tape winding or the like. The branch line 3 is positioned and fixed by covering the notch portion 13 with a positioning cover 14 and fixing the positioning cover 14 to the reinforcing rib 15 with a lock claw 14b. However, in this branch wire deriving method, it is necessary to accurately dimension the lead wire 3. Normal,
When a connector or the like is connected to the end of the branch wire 3 and the connector is connected to an electric device or the like, if the lead-out length of the branch wire 3 is short, the connector or the like cannot be connected to the electric device or the like. On the other hand, if it is too long, it may be in a slack state at all times and may come into contact with peripheral members to generate abnormal noise or the branch wire 3 may be damaged.

In order to solve the above-mentioned problem, Japanese Utility Model Application Laid-Open No.
Japanese Patent Application Laid-Open No. -60419 and the like disclose a structure of a protector for preventing a slack of a branch electric wire. The structure of the protector for preventing the slack of the branch electric wire will be described with reference to FIGS. FIG.
FIG. 7 is a perspective view showing a structure of the protector, FIG. 7 is a perspective view showing a state where a wire harness is assembled to the protector, FIG. 8 is a cross-sectional view showing a connection work state of the branch wires, and FIG. It is sectional drawing which shows the state after a connection. As shown in FIG.
Is housed, and the side wall 1 on one side is housed.
A cover 6 provided with a pair of locking claws 7 via a hinge edge 5 is formed at the opening edge of the opening a. This cover 6
Is a side wall 1 that covers the opening and faces the hinge edge 5.
The upper part of b is detachable from the receiving part 8 of the locking claw 7. Further, a draw-out opening 11 for drawing out the branch wire 3 of the wire harness W is opened in the side wall 1b where the receiving portion 8 is provided, and an elastic holding piece 10 for holding the branch wire 3 tightly by a tape or the like. Are formed along the side wall. The elastic holding piece 10 is configured to be able to bend and deform outward with the drawer port 11 side as a free end.

When the trunk section 4 of the wire harness W is mounted on the protector 1, the trunk section 4 of the wire harness W is stored with the cover 6 opened as shown in FIG. At the same time, the branch wire 3 is tied to the elastic holding piece 10 using a tape 16 or the like. Then, the cover 6 is closed and the locking claw 7 is engaged with the receiving portion 8. Next, when the connector 12 is connected to the electric device E, when the branch wire 3 is pulled toward the electric device E as shown in FIGS.
Length S for appropriate branch length S ₁ needed to connect the work task
_The branch wire 3 can be pulled out by the length obtained by adding ₂ . Then, when the branch wire 3 is released after the connection operation is completed, the elastic holding piece 10 returns to the position of FIG. 9 by its own elastic action, and the branch wire 3 is wired in a substantially tensioned state.

[0007]

[SUMMARY OF THE INVENTION] However, the branch length S ₁ described above, unless securely fixed by cross taping 16 to indicate the branch portion X of the wiring harness W in FIG. 10, a uniform branching length it is not possible to obtain the S _1. Therefore, since the branch portion X is fixed with the tape 16 before the protector 1 is attached, the protector 1 is retrofitted, and conversely, the positional deviation of the assembling of the protector 1 and the tape winding up to the trunk line portion 4 of the wire harness W in the protector 1 are performed. There are problems that must be solved in terms of quality control and workability of the wiring harness.

Recently, in consideration of workability, the wiring harness W is more efficiently assembled to the protector by using a fork jig on a wiring board (not shown). As shown in FIG. 11, the fork jig 21 is provided with a plurality of forks 23 a at the tip of a fork column 23 suspended from the base 22. These forks 23 a and 23 b are formed on the bottom surface of the protector 20 in advance when the protector 20 is formed. Jig hole (not shown)
And the protector 20 is supported. Next, the notch 2 into which the electric wire is incorporated and formed for branching
The branch wire 3 is pulled out from the connector 8 and connected to the connector 12. Next, the portions of the trunk portion 4 of the wire harness W that protrude from both ends of the protector 20 together with the tape winding portions 20b and 20c extending to the ends of the protector 20 are tape 16
The portion is partially stopped by a, and the end thereof is roughly wound by a tape 16b to be integrally focused. Further, the portion of the branch electric wire 3 protruding from the cutout portion 28 is roughly wound by the tape 16d to be integrally bundled. Finally, the cover 24 is provided with the fork removal hole 24a and the locking portion 25, and the cover 24 that is opened and closed by the hinge portion 26 is closed, and the locking portion 25 is locked by the locking projection 27, thereby completing the assembly. . Thereafter, the trunk line portion 4 of the wire harness W and the protector 20 are pulled out from the fork jig 21 in the state as they are, and the process proceeds to the next step.

The role of the fork jig 21 is that the protector 20 can be installed at an easily workable height, and the fork 23a separates the branch wire 3 from the unbranched wire, and the fork 23b until the branch wire 3 is tape-wound. This is to hold the protector 20 so as not to slip off. However, in order for the lead-out length L of the branch wire 3 to be accurately obtained, the branch portion 30 in the protector 20 needs to be securely fixed by cross taping as shown in FIG. In the above-described assembling step in which the protector 20 is first set on the fork jig 21, the side wall 20 a of the protector 20 becomes an obstacle, and cross taping cannot be performed on the branch portion 30. Therefore, the electric wire in the branch portion 30 is loosened, and the branch electric wire 3
When the tape is roughly wound by the tape 16c, the slack in the protector 20 is pulled out, and as a result, the lead-out length L becomes long. Also, the side wall 20a of the protector 20
And if the interval L ₀ between the root portion of the branch wire 3 is smaller than the tape winding diameter also occur when the Tape 16d is not defeated.
Therefore, this assembling method using the fork jig 21 still has problems in quality control and workability of the wire harness.

SUMMARY OF THE INVENTION It is an object of the present invention to accurately and easily determine the branch length of a branch wire for branching a wire harness from inside a protector, and to simplify the wiring work of the wire and improve the workability. An object of the present invention is to provide a method for deriving a branch wire of a wire harness.

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to provide a wire harness protector for a wire harness, comprising a side plate portion and a bottom plate portion, the side plate portion having a cutout for leading out a branch wire. In the method for deriving a branch wire of a wire harness for leading a branch wire out of the protector from the bundle main body, after sizing the branch length in advance and tape-fixing the branch portion outside the protector, the wiring is routed in the protector. Then, the branch wire is led out from the branch notch in the predetermined protector.

[0012]

Since the length of the branch length is determined in advance and the tape is fixed outside the protector, an accurate lead-out length can be obtained, and the tape can be reliably wound at a desired position.
Moreover, there is no concern that the side wall of the protector is in the way and the tape winding is prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. It goes without saying that the present invention is not limited to this embodiment. FIG. 1 is a perspective view showing a state in which a wire harness is routed to a protector and a branch wire is connected to a connector. FIG. 2 is a perspective view showing a state in which the wire harness is partially wound with a tape. FIG. FIG. 9 is a perspective view showing a state in which is completed.

As shown in FIG. 1, fork jigs 21a and 21b for holding the protector 20 are arranged, and the fork 23a is inserted into a jig hole provided in the protector 20 from above.
And 23b are inserted and held. Fork 23a
Is for sorting the branch electric wires from the wire harness 4, and the fork 23b is arranged for positioning in the cutout portion 28 of the branch electric wire. Further, the fork jig 21c sorts the branch wires 3 from the wire harness 4, and the fork jig 21d is arranged for holding a connection portion connecting the end of the branch wire 3 to the connector housing 12. Therefore, the positioning of the fork jig is first determined by the arrangement of the fork jigs 21a and 21b in accordance with the position of a jig hole (not shown) provided on the bottom surface of the protector 20.

Next, determined on the extension of the tape winding portion 20b disposed a distance L ₂ from the notch 28 of the fork jig 21c is in consideration of the working space. Therefore, the arrangement distance L of the fork jig 21c is determined by the length L (see FIG. 3) of the branch wire 3 drawn out from the notch 28 determined in advance.
Located a distance L ₁ from the fork jig 21c of the fork jig 21d is determined by the addition of _2. It is also possible to determine the length L derives branch wire 3 by subtracting the arrangement distance L ₂ from the arrangement distance L ₁ in the opposite. The arrangement location of the fork jig 21d is disposed a distance L ₂ can be secured, it is not necessary to arrange as shown in FIG. If the work easily located, it is also possible to close more to the protector 20.

Next, the wires of the trunk line portion 4 of the wire harness W, which is a wire bundle, are routed one by one into the protector 20, and
An electric wire branched from the wire is pulled out from the fork 23c of the fork jig 21c to the fork jig 21d, and is locked to the connector housing 12. In this case, an electric wire that is routed from the tape winding portion 20b and is to be branched from the cutout portion 28 is routed into the protector 20, and after exiting the tape winding portion 20c, a branch wire is drawn from the fork 23c. However, the wires that are routed from the tape winding portion 20c and are to be branched from the cutouts 28 are drawn out of the fork 23c as they are to the fork jig 21d without being routed into the protector 20.

Next, as shown in FIG. 2, the tape winding portion 20b of the protector 20 is partially stopped by the tape 16a, and the end thereof is roughly wound by the tape 16b.
The fork 2 of the trunk section 4 held by the fork jig 21c
3c Both ends are partially stopped by a tape 16e, and thereafter, the wire is wound roughly by a tape 16b to converge the electric wires. Also, the branch electric wire 3 is wound around the fork 23c and the fork 23d with a tape 16d in a rough winding shape to converge the electric wires.

Next, as shown in FIG. 3, the branch wire 3 provided with the connector at the tip is pulled out from the fork jig 21d which has been held, and then dropped down in the direction along the trunk line 4 to be routed into the protector 20. Then, by pulling out the branch wire 3 from the cutout portion 28, it is possible to reliably obtain a branch wire having a derived length L which is a predetermined length. After that, protector 20
The trunk line portion 4 including the tape winding portion 20c and a part of the branch wire 3 is partially stopped by the tape 16a, and the wire harness W is pulled out from the fork jig 21c. Finally, the cover 24 is closed such that the fork 23b comes out of the fork release hole 24a of the cover 24, and the locking portion 25 is locked by the locking projection 27 so that the branch wire 3
Is completed.

According to this method, it is not necessary to keep a constant distance between the side wall 20a and the branch wire 3. Further, even if the branch portion in the protector 20 is not cross-taped, the length of the lead-out length L is determined outside the protector 20 and the partial stop is performed with tape.
There is no slack in the wires.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible. For example, the present invention can be applied to protectors of various shapes as long as a hole for fork removal is provided, and is also applicable to a protector having a straight shape. In addition, it is not always necessary to install a fork in the cutout for the branch wire, and even if there are multiple branches, the number of fork jigs is necessary. The work can be performed accurately and efficiently.

[0021]

As described above, according to the method for deriving a branch wire of a wire harness according to the present invention, the forked jig is used to determine the length of the branch wire and to determine the length of the branch wire outside the protector. Since the branch wire is drawn out from the notch of the protector after winding the tape, branching and tape winding of the branch wire can be performed at a position that is easy to work outside the protector according to the space of the work place, and Improvement can be achieved. Further, since the dimensions are accurately determined by installing the fork jig, it is possible to achieve the quality control by the integrated production of the wire harness on the fork jig.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a wiring state of a wire harness to a protector and a connection state of a branch wire to a connector according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where a tape is partially wound.

FIG. 3 is a perspective view showing a state where assembly of the wire harness to the protector is completed.

FIG. 4 is a perspective view showing the structure of a conventionally used protector.

FIG. 5 is a perspective view showing a state where a wire harness is assembled to a conventional protector.

FIG. 6 is a perspective view showing the structure of another conventional protector.

FIG. 7 is a perspective view showing a state in which a wire harness is assembled to another conventional protector.

FIG. 8 is a cross-sectional view showing a connection operation state of the branch electric wires in FIG. 7;

9 is a cross-sectional view showing a state after connection of the branch electric wires in FIG. 7;

FIG. 10 is a perspective view showing a state where a branch portion of the wire harness is cross-taped.

FIG. 11 is a perspective view showing a conventional assembling structure for assembling a wire harness to a protector using a fork jig.

[Explanation of symbols]

Reference Signs List 3 branch wire 4 wire harness trunk 12 connector housing 16a, 16e tape partial stop 16b, 16d tape rough winding 20 protector body 20a protector side wall 20b, 20c tape winding 21a, 21b protector holding fork jig 21c, 21d electric wire holding fork jig 23a, 23b, 23c, deriving the length of the hole L branches electric wire exit 23d fork 24 cover 24a fork L _1, L ₂ arranged fork jig distance W wire harness X wire harness branch part

Claims (1)

(57) [Claims] 1. A branch wire is led out of a protector for a wire harness which is composed of a side plate portion and a bottom plate portion and has a cutout for leading a branch wire in the side plate portion and which is routed in a wire harness protector. In the method for deriving a branch wire of a wire harness, after sizing the branch length in advance and tape-fixing the branch portion outside the protector, the wiring is routed in the protector and the branch cutout in the predetermined protector. A method for deriving a branch wire of a wire harness, wherein the branch wire is derived.