JPH09172713A - Tool for making wire harness branch off - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform the processing of an electric wire in a branch part in which a bunch of branch electric wires branch off from a bunch of main electric wires in a wire harness, to make it look more attractive and also to ensure flexibility in the periphery of the branch part. SOLUTION: A bunch of branch electric wires 19 are inserted into a protective cylinder part 37 from a slit 37 which is provided in a band part 23, a main electric wire bunch pressing part 25 and a protective cylinder part 27. In that state, the main electric wire bunch pressing part 25 is made to enter between a bunch of main electric wires 17 and a corrugated tube 21, and further the circumference of the corrugated tube 21 is fastened by the band part 23 for fixation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness branching tool having a structure in which a branch wire bundle branched from a main wire bundle is pulled out from a cut portion formed in a flexible tube covering the periphery of the main wire bundle. .

[0002]

2. Description of the Related Art Conventionally, for example, in a wire harness of an automobile, a treatment of a portion where a branch electric wire bundle is branched from a main electric wire bundle is performed as shown in FIG. The periphery of the branch portion of the main wire bundle 1 is covered with a hard corrugated tube 3 to protect it from mechanical shock. The corrugated tube 3 has a bellows shape in which large diameter portions and small diameter portions are alternately formed in order to obtain flexibility, and a cutting portion 3a for inserting the main electric wire bundle 1 over the entire length in the longitudinal direction thereof. Are formed. The central portion 3b of the cutting portion 3a
From, the branch electric wire bundle 5 is pulled out. A PVC tube 7 is placed around the drawn-out portion of the branch wire bundle 5.
Are provided in a state of being inserted into the inside of the main electric wire bundle 1, whereby the branch electric wire bundle 5 is prevented from being damaged due to interference of the cut portion 3a of the corrugated tube 3 with the branch electric wire bundle 5.

FIG. 5B shows a tape 9 wound around and fixed to the periphery of the branch portion shown in FIG. 5A. By winding the tape 9 around the branch portion, the electric wire is prevented from jumping out due to the opening of the cutting portion 3a at the branch portion.

Other examples include those described in Japanese Utility Model Publication No. 54-85395 (see FIG. 6) and Japanese Utility Model Publication No. 54-175578 (see FIG. 7). These are all connected to the branching part where the branch wire bundle 5 branches from the main wire bundle 1.
The branch tool 11 is attached. The branch tool 11 is shown in FIG.
As shown in FIGS. 7A and 7A, the main wire bundle 1 includes a holding portion 11a that holds down the periphery of the branch portion, and a tubular portion 11b through which the branch wire bundle 5 is inserted. After mounting the branching tool 11 as described above, a tape is wound on the branching tool 11 and fixed, and as shown in FIGS. 6 (b) and 7 (b), from the top of FIG. A similar corrugated tube 3 is put on.

[0005]

However, in the example of FIG. 5 described above, it is necessary to wind the tape over the corrugated tube 3 in order to prevent the electric wire from jumping out, and in the examples of FIGS. For the same reason as 5 above, it is necessary to wind the tape from above the corrugated tube 3,
The branch tool 11 even before the corrugated tube 3 is covered.
Since the tape winding is required to hold down the tape, workability is extremely poor, and if the tape winding is exposed on the surface, it is disadvantageous in terms of appearance and deteriorates the quality. In the example of FIGS. 6 and 7, the tubular portion 11b is further added.
Since it is necessary to increase the height H of the branching tool 11 to some extent, there is a problem in the flexibility of the branching part, and the reliability is lowered.

In view of this, the present invention intends to efficiently perform the wire branching process at the branching part where the branch wire bundle is branched from the main wire bundle, maintain a good appearance, and secure the flexibility around the branch part. Has an aim.

[0007]

In order to achieve the above object, the present invention is, firstly, that a branch electric wire bundle branched from the main electric wire bundle is formed in a flexible tube covering the main electric wire bundle. In a branching tool for a wire harness having a configuration drawn out from the cut section, a band section having an insertion hole through which the branch electric wire bundle is inserted, the band section being wound around and fixed around the flexible tube, and the insertion section of the band section. A protective tube portion that is in communication with the hole and through which the branch electric wire bundle is inserted, and has a protective tube portion that enters the flexible tube from the cutting portion, and at one side of the band portion and the protective tube portion. A slit for inserting the branch electric wire bundle is provided in each of the insertion holes.

Secondly, in the first structure, a main portion is provided with an insertion hole through which the branch electric wire bundle is inserted at an end portion of the protection cylinder portion opposite to the band portion, the communication hole communicating with the insertion hole of the protection cylinder portion. An electric wire bundle pressing portion is provided, and the main electric wire bundle pressing portion is interposed between the main wire bundle and the periphery of the portion of the cutting portion of the flexible tube where the branch electric wire bundle is pulled out. In addition, a slit is provided for inserting the bundle of branched electric wires into the insertion hole.

Thirdly, in the first configuration or the second configuration, the flexible tube is a bellows-shaped tube in which a large-diameter portion and a small-diameter portion are alternately provided, and the bellows-shaped tube of the band portion. A rib for preventing deviation that enters the small-diameter portion and prevents deviation of the bellows-shaped tube is provided on the inner surface facing the.

According to the first configuration, the branch wire bundle is inserted into each insertion hole through the slits provided in the band portion and the protective tube portion, and in this state, the protective tube portion is cut into the flexible tube. By letting it enter and further fixing the periphery of the flexible tube with the band part, the interference of the cut part of the flexible tube with the branch wire bundle is avoided by the protective tube part and the branch wire bundle is prevented from being damaged. As a result, such a processing of the branch portion has extremely good workability and a good quality feeling as compared with the case of winding the tape. Further, the length of the protective tube portion may be slightly longer than the thickness of the flexible tube because the protective tube portion may be inserted into the inside of the flexible tube, and the flexibility at the branch portion is sufficiently secured. ing.

According to the second structure, the branch wire bundle is inserted into each insertion hole through the slits provided in the band portion, the main wire bundle holding portion and the protective tube portion, and the main wire bundle holding portion is held in this state. By inserting it between the main wire bundle and the flexible tube, and by fixing the periphery of the flexible tube with the band part, interference of the cut part of the flexible tube with the branch wire bundle is prevented by the protective tube part. By avoiding this, the branch wire bundle can be prevented from being scratched, and the processing of such a branch part is much easier to work with than the case of tape winding, and the quality feeling is also good. Since the main electric wire bundle is pressed by the section, the processing of the branch section becomes more reliable. Further, the length of the protective tube portion may be slightly longer than the thickness of the flexible tube because the flexible tube may be inserted between the band portion and the main wire holding portion, and the flexible portion at the branch portion may be used. The sex is sufficiently secured.

According to the third structure, by providing the deviation preventing rib on the inner surface of the band portion facing the bellows-like tube, the deviation preventing rib enters the small diameter portion and prevents the deviation of the bellows-like tube. To be done.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a state before a branching tool 15 is attached to a branching portion of a wire harness 13 showing an embodiment of the present invention. 2A is a view of the branching tool 15 as viewed from the direction of arrow A in FIG. 1, and FIG.
It is a B arrow view of (a). Wire harness 13 described above
Also, like the conventional one shown in FIG. 5, the main wire bundle 1
A branch electric wire bundle 19 is formed in a branched manner with respect to 7, and the main electric wire bundle 17 around the branch portion is a corrugated tube 21 which is a flexible bellows-shaped tube in which a cut portion 21a is formed along the longitudinal direction. This cutting part 21a is covered with
The branch electric wire bundle 19 is pulled out from the central portion 21b of the.

The branching tool 15 includes a band portion 23 around which the corrugated tube 21 is wound and fixed, and a branch wire bundle 1.
The central part 2 of the corrugated tube 21 from which 9 is pulled out
A rectangular main wire bundle holding portion 25 interposed between the periphery of the cutting portion 21a and the main wire bundle 17 in 1b, and between the main wire bundle holding portion 25 and the band portion 23 and integrated with both of them. And a protective tube portion 27 into which the branch electric wire bundle 19 is inserted.

The band portion 23 has a lock portion 2 at one end.
9, the other end side is inserted into the insertion hole 29a of the lock portion 29, and a plurality of locking projections 31 are formed on the surface of the lock claw 29b formed in the insertion hole 29a.
Are engaged to lock. An insertion hole 33 for inserting the branch electric wire bundle 19 is formed near the lock portion 29 of the band portion 23, and an insertion hole 35 for inserting the branch electric wire bundle 19 is also formed in the main electric wire bundle holding portion 25. Are formed. Each of these insertion holes 33, 35 communicates with the insertion hole 27a formed in the protective cylinder portion 27 to form a through hole 37.

The length T of the protective cylinder portion 27 shown in FIG.
It is formed to be slightly longer than the thickness of the corrugated tube 21 (the dimension between the outer peripheral surface of the large diameter portion and the inner peripheral surface of the small diameter portion), whereby the corrugated tube 21 is connected to the band portion 23 and the main wire bundle holding portion 25. You can get in between.

A slit 37 for inserting the bundle of branched electric wires 19 is formed on one side of the main wire bundle holding portion 25 through the protective cylinder 27 and the band portion 23 corresponding to the through hole 37. . Further, on the inner surface of the band portion 23 around the protective cylinder portion 27, as shown in FIG. 2, a plurality of shift preventing ribs 39 are formed along the longitudinal direction of the band portion 23. The deviation preventing rib 39 is provided in the branching tool 1
5 is attached to the branch portion of the wire harness 13, and is shaped so as to enter the small-diameter portion of the corrugated tube 21 at a position facing the corrugated tube 21. Has a function to prevent.

FIG. 3 shows a procedure for assembling the branching tool 15 to the wire harness 13 as described above. As shown in FIG. 3A, the branching wire bundle 19 is penetrated through the slit 37 of the branching tool 15. After inserting it in 37, the main wire bundle holding portion 25 is attached to the corrugated tube 2 as shown in FIG.
The cut portion 21a of No. 1 is inserted between the corrugated tube 21 and the main electric wire bundle 17. In this state, as shown in FIG. 6C, the other end side is inserted into the lock portion 29 by the band portion 23 and wound around the corrugated tube 21, and further, as shown in FIG. The remaining portion on the other end side of the band portion 23 pulled out from the lock portion 29 in the locked state is cut off. FIG. 4 is an enlarged cross-sectional view taken along the line CC of FIG. 3 (d), in which the main wire bundle pressing portion 25 of the branching tool 15 has the branch wire bundle 19 of the corrugated tube 21.
It can be seen that it is in a state of being inserted between the peripheral portion of the cutting portion 21a from which the wire is drawn and the main wire bundle 17.

In this way, the branch wire bundle 19 is inserted into the protective tube portion 27, and in this state, the main wire bundle holding portion 25 is inserted between the main wire bundle 17 and the corrugated tube 21, and the band portion 23 is further provided. Corrugated tube 2
By tightening and fixing the periphery of 1, the interference of the cut portion 21a of the corrugated tube 21 with the branch electric wire bundle 19 can be avoided by the protective cylinder portion 27, and the branch electric wire bundle 19 can be prevented from being damaged. Compared with the case of winding the tape shown in the conventional example, the process of is extremely workable, and the work time can be shortened to reduce the cost.
The quality is also good.

Further, since the ribs 39 for preventing deviation are provided on the inner surface of the band portion 23 facing the corrugated tube 21, the ribs 39 for preventing deviation enter the small-diameter portion of the corrugated tube 21 so as to enter the corrugated tube 21.
Is prevented, and the branching part 15 is more reliably fixed to the branching part. Furthermore, the length T of the protective tube portion 27 need only be slightly longer than the thickness of the corrugated tube 21, so that flexibility at the branch portion is not impaired and reliability is secured.

[0022]

As described above, according to the first aspect of the invention, the bundle of branched electric wires is inserted into each insertion hole through the slits provided in the band portion and the protective cylinder portion, and in this state the protective cylinder portion is inserted. The protective tube prevents the flexible tube from interfering with the branch electric wire bundle by fixing the circumference of the flexible tube with the band section. As a result, it is possible to prevent the bundle of branch electric wires from being scratched, and the treatment of such a branching portion has extremely good workability as compared with the case of tape winding, and a good quality feeling can be maintained. Further, the length of the protective tube portion may be slightly longer than the thickness of the flexible tube since the protective tube portion may be inserted into the flexible tube, and the flexibility at the branch portion is sufficiently secured. be able to.

According to the second aspect of the invention, the branch wire bundle is inserted into each insertion hole through the slits provided in the band portion, the main wire bundle holding portion and the protective cylinder portion, and the main wire bundle holding portion is held in this state. By inserting it between the main wire bundle and the flexible tube, and by fixing the periphery of the flexible tube with the band part, interference of the cut part of the flexible tube with the branch wire bundle is prevented by the protective tube part. By avoiding this, the branch wire bundle can be prevented from being scratched, and the processing of such a branch part is much easier to work with than the case of tape winding, and the quality feeling is also good. Since the main electric wire bundle is pressed by the section, the branching section can be processed more reliably. Further, the length of the protective tube portion may be slightly longer than the thickness of the flexible tube because the flexible tube may be inserted between the band portion and the main wire holding portion, and the flexible portion at the branch portion may be used. It is possible to secure the property sufficiently.

According to the third aspect of the present invention, by providing the deviation preventing rib on the inner surface of the band portion facing the bellows-like tube, the deviation preventing rib enters the small-diameter portion and prevents the deviation of the bellows-like tube. can do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state before a branching tool is attached to a branching portion in a wire harness showing an embodiment of the present invention.

2A is a view as seen from an arrow A in FIG. 1, and FIG. 2B is a B in FIG.
It is an arrow view.

FIG. 3 is an explanatory view showing a procedure for assembling the branching tool in FIG. 1 into a wire harness.

FIG. 4 is an enlarged sectional view taken along line CC of FIG. 3 (d).

FIG. 5 is an explanatory view showing a method of processing a portion where a branched electric wire bundle branches from a main electric wire bundle showing a conventional example.

FIG. 6 is an explanatory view showing an example in which a branching tool is used for a branching part, as compared with the conventional example of FIG.

FIG. 7 is an explanatory view showing another conventional example in which a branching tool is used for a branching portion.

[Explanation of symbols]

 13 wire harness 15 branching tool 17 main electric wire bundle 19 branch electric wire bundle 21 corrugated tube (flexible tube) 21a cutting part 23 band part 25 main electric wire bundle holding part 27 protective cylinder parts 27a, 33, 35 insertion hole 37 slit 39 shift Preventive rib

Claims (3)

[Claims] 1. A branching tool for a wire harness, wherein a branching wire bundle branched from the main wire bundle is drawn out from a cutting portion formed in a flexible tube covering the periphery of the main wire bundle. A band portion that has an insertion hole through which the flexible tube is wound around and fixed around the flexible tube,
The band portion and the protective tube are provided with an insertion hole communicating with the insertion hole of the band portion and through which the branch electric wire bundle is inserted, and having a protective tube portion that enters the flexible tube from the cutting portion. A branching tool for a wire harness, characterized in that a slit for inserting the branch electric wire bundle into each of the insertion holes is provided on one side of the portion. 2. An end portion of the protective tube portion opposite to the band portion,
A main electric wire bundle holding portion having an insertion hole that communicates with the insertion hole of the protective tubular portion and through which the branch electric wire bundle is inserted is provided, and the main electric wire bundle holding portion is the branch electric wire bundle of the cut portion in the flexible tube. Is inserted between the periphery of the portion where the wire is pulled out and the main electric wire bundle, and one side is provided with a slit for inserting the branch electric wire bundle into the insertion hole. The wire harness branching tool according to 1. 3. The flexible tube is a bellows-shaped tube in which large-diameter portions and small-diameter portions are provided alternately, and the bellows is inserted into the small-diameter portion on the inner surface of the band portion facing the bellows-shaped tube. 3. The wire harness branching tool according to claim 1, further comprising a deviation preventing rib for preventing deviation of the tubular tube.