JP2024021365A - Electric wire assembly structure - Google Patents

Abstract

An object of the present invention is to provide an electric wire assembly structure that can improve work efficiency when assembling electric wires to a casing that accommodates electrical components.
The present invention includes an electric wire WX with a binding band and an electrical junction box 1, and a thick groove part 15 and a narrow groove part 16 are continuously formed in a guide wall 12b of an electric wire pull-out guide 12 of the electrical junction box 1. The head part 51 of the binding band 50 of the electric wire WX with a binding band is inserted through the thick groove part 15 from the inside to the outside of the guide wall 12b, and then moved to the narrow groove part 16, so that the head part 51 is inserted into the narrow groove part 16. In this state, the head portion 51 is positioned in the position regulating portion 16a of the narrow groove portion 16, thereby regulating the position of the wire WX with the binding band in the wire guide direction of the wire pull-out guide 12.
[Selection diagram] Figure 1

Description

The present invention relates to an assembly structure for electric wires connected to electrical components housed in a housing.

When assembling a wire harness to an electrical junction box such as a relay box, the wire harness pulled out from the electrical junction box is often fixed to a wire pull-out guide of the electrical junction box with a cable tie.

In the conventional example shown in FIG. 7, a wire pull-out guide 120 that protrudes outward is provided on a housing wall 110 of an electrical junction box 100, and an insertion hole 60 is provided in the wire pull-out guide 120 for passing the band portion 52 of the binding band 50. It is being When fixing the wire harness W to the wire pull-out guide 120 of this electrical junction box 100, set the wire harness W to the wire pull-out guide 120 while adjusting the pull-out dimensions, and in that state, tighten the band portion 52 of the cable tie 50. It is wound around the outer periphery of the wire harness W and the wire pull-out guide 120. Then, the tip of the wound band portion 52 is passed through the insertion hole 60 of the wire pull-out guide 120, and then inserted into the head portion 51 and locked, thereby tightening and fixing the wire harness W to the wire pull-out guide 120. are doing.

Similar examples of such conventional examples are described in Patent Document 1 and Patent Document 2.
For example, Patent Document 1 discloses a structure in which the tip of a cable tie is inserted into a hole from a guide groove while a plurality of electric wires are inserted into a wire insertion part (corresponding to a wire pull-out guide). . Further, in Patent Document 2, two insertion holes are provided at the tip side of a pull-out guide (corresponding to an electric wire pull-out guide) protruding from the peripheral wall of the electrical connection box, and the wire harness is tied while being wound around the outer periphery of the wire harness. A structure is disclosed in which a wire harness is fixed to a pull-out guide by passing a band through two insertion holes and tightening the band.

By the way, as shown in FIG. 8, when assembling the wire harness W to the electrical connection box 100, a specific point of the wire harness W (for example, a branch line branching from the main line Wa) is connected from the tip 120a of the wire pull-out guide 120 of the electrical connection box 100. The distance L1 to the branch point C) of Wb may be specified in the specifications. In such a case, conventionally, the wire harness W is moved in and out of the wire pull-out guide 120, and the length of the wire harness W is adjusted to the appropriate specification value L1, and then the cable tie 50 is adjusted. The wire harness W is fixed to the wire pull-out guide 120.

Japanese Patent Application Publication No. 2012-228079 Japanese Patent Application Publication No. 2000-253536

However, the work of fixing the wire harness W to the wire harness guide 120 with the cable tie 50 while adjusting the dimensions of the wire harness W in and out of the wire harness guide 120 takes time to adjust the position of the wire harness, and the work efficiency is poor. There was a problem.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide an electric wire assembly structure that can improve work efficiency when assembling electric wires to a casing that accommodates electrical components. There is a particular thing.

In order to achieve the above-mentioned object, a structure for assembling a lead wire to an electrical junction box according to the present invention has the following features.

electric wire and
A binding band having a band part for wrapping around the electric wire and binding the electric wire, and a head part provided at the base end of the band part and having an insertion hole into which the tip of the band part is inserted and locked;
a guide wall protruding outward from a side wall of a housing housing the electrical components;
The guide wall is continuously formed with a thick groove portion and a narrow groove portion penetrating along the wire guiding direction, and the groove width of the thick groove portion is set to a size that allows the head portion to be inserted therethrough, and the groove width of the narrow groove portion is is set to a size that makes it impossible to insert the head portion,
The head portion of the binding band wound around the electric wire is inserted through the wide groove from the inside to the outside of the guide wall, and then moved to the narrow groove. An electric wire assembly structure in which the head portion is positioned.

According to the present invention, by fixing the cable tie at a predetermined position in the length direction of the wire before assembling the wire to the electrical connection box, the wire with the cable tie can be simply assembled to the electrical connection box, and the lead-out wire can be connected to the electrical connection box. The length can be set according to specifications. Therefore, it does not take much time to adjust the position of the electric wires, and the efficiency of the assembly work can be improved.

The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the mode for carrying out the invention (hereinafter referred to as "embodiment") described below with reference to the accompanying drawings. .

FIG. 1 is an exploded perspective view of an assembly structure according to an embodiment of the present invention. FIG. 2 is a perspective view of the assembled structure of one embodiment in a completed state. FIG. 3 is a perspective view for explaining the assembly procedure of the assembly structure of one embodiment. FIG. 4 is a perspective view of the assembly structure of one embodiment viewed from below, with the lower cover and wire harness omitted. FIG. 5 is a perspective sectional view taken along a plane perpendicular to the axial direction at the position of the narrow groove in the assembly structure of one embodiment. FIG. 6 is a perspective sectional view showing a state in which the binding band in FIG. 5 is removed. FIG. 7 is a perspective view showing a conventional example. FIG. 8 is an explanatory diagram of how to set the length of a wire harness in a conventional example.

Specific embodiments of the present invention will be described below with reference to each figure.
FIG. 1 is an exploded perspective view of an assembly structure according to an embodiment of the present invention, and FIG. 2 is a perspective view of the structure of the embodiment in a completed state.

As shown in FIGS. 1 and 2, the electric wire assembly structure according to the present embodiment includes an electrical connection box 1 such as a relay box that accommodates electrical components, a wire harness (wire) W, and an integral resin molded product. A binding band 50 consisting of:

The electrical connection box 1 includes a box body 10 and a lower cover 20 attached to the lower surface of the box body 10. A casing wall 11 of the box body 10 is provided with an electric wire pull-out guide 12 that projects outward. Further, the housing wall 21 of the lower cover 20 is provided with an electric wire pull-out guide 22 that constitutes the electric wire pull-out cylindrical guide 2 by combining with the electric wire pull-out guide 12 on the box body 10 side.

The wire pull-out guide 12 on the side of the box body 10 is formed in a semi-cylindrical shape, and the lower surface 13 is open so that the wire harness W can be accommodated inside the wire pull-out guide 12 from below. Further, the electric wire pull-out guide 22 on the lower cover 20 side is formed in a shape that can cover the open lower surface 13 of the electric wire pull-out guide 12 on the box body 10 side, for example, a semi-cylindrical shape or a circular arc tube shape. .

The wire pull-out guide 12 protruding outward from the housing wall 11 of the box body 10 has a semi-cylindrical guide wall 12b as a main element. A thick groove portion 15 and a narrow groove portion 16 are continuously formed to pass through the guide wall 12b along the protruding direction of the pull-out guide 12. Here, the thick groove portion 15 is disposed on the proximal end side in the protruding direction of the wire pull-out guide 12, and the narrow groove portion 16 is disposed on the distal end side in the protruding direction of the wire pull-out guide 12.

On the other hand, the binding band 50 includes a band portion 52 in the form of a flexible band plate that is wound around the outer periphery of the wire harness W that is the object to be bundled, and is provided at the base end of the band portion 52, and is provided at the base end of the band portion 52. The head part 51 has an insertion hole 53 through which the free end side of the band part 52, which is rolled into a loop shape for winding W, is inserted. An engaging pawl (not shown) is provided on the inner surface of the insertion hole 53 of the head portion 51 to prevent movement of the band portion 52 in the return direction by engaging with any tooth of the engaging tooth row formed on the band portion 52. It is being

The groove width b1 (circumferential groove width of the semi-cylindrical guide wall 12b) of the thick groove portion 15 provided in the wire pull-out guide 12 of the electrical connection box 1 allows the head portion 51 of the binding band 50 to be inserted therethrough. The dimensions are set. Further, the groove width b2 (<b1) of the narrow groove portion 16 is set to a dimension that prevents the head portion 51 of the binding band 50 from being inserted therethrough. The tip edge of the narrow groove portion 16 in the wire guiding direction is set at a distance L2 from the tip 12a of the wire pull-out guide 12 so as to function as a position regulating portion 16a that regulates the position of the head portion 51.

In the assembly structure of this embodiment, a wire harness WX with a binding band, on which a binding band 50 has been fixed to the outer periphery in advance, is assembled to the wire pull-out guide 12 of the electrical connection box 1 in that state.

That is, in the wire harness WX with a cable tie, the band part 52 of the cable tie 50 is wound around the outer periphery of the wire harness W, and the tip of the band part 52 is inserted into the insertion hole 53 of the head part 51 provided at the base end of the band part 52. The wire harness W is inserted and locked into the wire harness W, and the wire harness W is tied with a binding band 50. Note that the binding band 50 does not necessarily need to be used to bind the plurality of electric wires that constitute the wire harness W, and may be provided simply for positioning the wire harness W.

FIG. 3 is a perspective view for explaining the assembly procedure of the assembly structure of this embodiment.
To obtain the structure of this embodiment, first, as shown in the left end view of FIG. The wire is accommodated from below into the inner space of the wire pull-out guide 12 (the space below the guide wall 12b) of the box body 10 of the box 1 (operation shown by arrow A in the figure). At the same time, as shown in the center view of FIG. 3, the head portion 51 of the cable tie 50 is moved from the inner side (lower side in the figure) to the outer side (upper side in the figure) of the guide wall 12b of the wire pull-out guide 12. It is inserted through the groove 15.

Next, as shown in the right end view of FIG. 3, the head section 51 is moved from the wide groove section 15 to the narrow groove section 16 above the guide wall 12b (operation indicated by arrow B in the figure). By doing so, the head portion 51 is held from the outer side to the inner side of the guide wall 12b so as not to come off. In this state, by abutting the head portion 51 against the position regulating portion 16a of the narrow groove portion 16, the electric wire WX with the binding band is fixed at a predetermined position in the wire guiding direction of the electric wire pull-out guide 12 while being positionally restricted. FIG. 2 shows this state.

In this case, as shown in FIG. 2, the reference position 51a of the head portion 51 of the cable tie 50 fixed to the wire harness W (the end surface on the distal end side of the wire pull-out guide 12) is from the specific point C such as the aforementioned branch point. The distance is set in advance to L. However, if L1 is the distance from the tip 12a (120a) of the electric wire pull-out guide 12 (120) mentioned above to the specific point C, then
L=L1+L2
It is set so that

With this setting, the reference position 51a of the head portion 51 of the cable binding band 50 is aligned with the position of the position regulating portion 16a of the wire pull-out guide 12 (the head portion 51 is pushed against the end of the narrow groove portion 16). By doing this, when the wire harness WX with a cable tie is assembled to the wire pull-out guide 12, the distance from the tip 12a of the wire pull-out guide 12 to the specific point C of the wire harness W can be set to L1 according to the specifications. can.

FIG. 4 is a perspective view of the assembly structure of this embodiment viewed from below with the lower cover and wire harness omitted, and FIG. FIG. 6 is a perspective sectional view taken along a vertical plane. FIG. 6 is a perspective sectional view showing a state in which the binding band in FIG. 5 is removed.

Further, the semi-cylindrical electric wire pull-out guide 12 has the following additional configuration, which will be explained with reference to FIGS. 4 to 6.
One of the added features is a stopper protrusion 17 provided on the inner surface of the guide wall 12b at the entrance position of the narrow groove part 16 when the head part 51 moves from the wide groove part 15, as shown in FIG. . This stopper protrusion 17 is formed when the head portion 51 of the binding band 50 moves from the wide groove portion 15 to the narrow groove portion 16, mainly because the band portion 52 is elastically deformed and overcomes the narrow groove portion 16 of the head portion 51. It prevents reverse movement into the groove 15, and is provided as a protrusion with a chevron-shaped cross section to straddle the narrow groove 16.

Another added feature is diagonal contact surfaces 18 and 19 provided on both inner surfaces of the narrow groove portion 16 facing each other in the width direction, as shown in FIGS. 5 and 6. These abutting surfaces 18 and 19 are portions on which the head portion 51 and the opposing outer surfaces in the vicinity thereof come into contact in the circumferential direction of the binding band 50, and are provided in a shape corresponding to the shape of the binding band 50 side. For example, as shown in FIG. 6, one of the abutment surfaces 18 is a portion that the side surface of the head portion 51 comes into direct contact with, so it is constituted by a simple slope. The other abutting surface 19 is a part where a part of the head portion 51 and a portion 52a immediately before insertion of the band portion 52 inserted into the head portion 51 come into contact, so it is provided as a combination of two slopes 19a and 19b. ing.

After the wire harness WX with a cable tie is assembled to the box body 10 side as described above, the lower cover 20 is attached to the bottom surface of the box body 10 as shown in FIGS. It can be fixed to the electrical connection box 1 while being accommodated in the electrical connection box 2.

As explained above, according to the assembly structure of this embodiment, before assembling the wire harness W to the electrical connection box 1, the binding band 50 can be fixed at a predetermined position in the length direction of the wire harness. By simply assembling the wire harness WX with a binding band to the electrical connection box 1, the length of the drawer wire harness W can be set according to the specifications, and the assembling work can be facilitated. Moreover, since the binding band 50 can be fixed to the wire harness W in a free state before being assembled to the electrical connection box 1, the fixing of the binding band 50 can be automated.

Further, in this embodiment, since the stopper protrusion 17 is provided on the semi-cylindrical guide wall 12b, there is no fear that the binding band 50 positioned in the narrow groove part 16 will return to the thick groove part 15 side without permission, and the electrical connection box The fixed state of the wire harness W relative to the wire harness W can be stably maintained.

In addition, in this embodiment, the head portion 51 positioned in the narrow groove portion 16 and the two outer surfaces in the vicinity thereof come into contact with the diagonal abutment surfaces 18 and 19 of the narrow groove portion 16, thereby preventing the head portion 51 of the binding band 50 from shaking. It can be stably supported.

Further, in this embodiment, even when assembling the wire harness W to the electrical connection box 1 such as a relay box that is larger in size than the wire harness W, the wire harness WX with the cable tie 50 attached in advance is attached to the electrical connection box 1. By simply assembling the wire harness W, the wire harness W can be fixed to the electrical connection box 1 while maintaining the drawn-out length as set, so that the work can be facilitated.

Note that the present invention is not limited to the embodiments described above, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiments are arbitrary as long as the present invention can be achieved, and are not limited.

For example, in this embodiment, a case is explained in which a wire harness (wire) W is assembled to an electrical junction box 1 mounted on a vehicle, but regardless of whether it is mounted on a vehicle or not, an electrical component It is applicable when assembling electric wires into a housing that accommodates.

Here, the features of the electric wire assembly structure according to the embodiment of the present invention described above will be briefly summarized and listed below in [1] to [4].
[1] Electric wire (W) and
A band part (52) for winding around the electric wire (W) and binding the electric wire, and an insertion hole (53) provided at the base end of the band part (52) into which the tip of the band part (52) is inserted and locked. ); and a binding band (50) having a head portion (51) formed with a
a guide wall (12b) protruding outward from a side wall of the casing (10) that houses the electrical components;
Equipped with
The guide wall (12b) is continuously formed with a thick groove (15) and a narrow groove (16) that penetrate along the wire guiding direction, and the groove width of the thick groove (15) is equal to the width of the head portion (51). The groove width of the narrow groove portion (16) is set to a size that allows insertion of the head portion (51), and
The head portion (51) of the binding band wound around the electric wire (W) is inserted through the thick groove portion (15) from the inside to the outside of the guide wall (12b), and then The head portion (51) is positioned in the narrow groove portion (16) by being moved to the groove portion (16).
Electric wire assembly structure.

According to the electric wire assembly structure configured in [1] above, before assembling the electric wire (W) to the electrical junction box (1), the cable tie (50) is placed at a predetermined position in the length direction of the electric wire (W). By fixing it, the length of the lead-out wire (W) can be set according to specifications simply by assembling the wire with a cable tie (WX) to the electrical connection box (1). Therefore, it does not take much time to adjust the position of the electric wire (W), and the efficiency of the assembly work can be improved. Further, since the binding band (50) can be fixed to the electric wire (W) in a free state before being assembled to the electrical connection box (1), the fixing of the binding band (50) can be automated.

[2] The inner surface of the guide wall (12b) is located at the entrance of the narrow groove (16) when the head (51) moves from the wide groove (15). A protrusion is provided to prevent reverse movement from the narrow groove portion (16) to the wide groove portion (15).
The electric wire assembly structure according to [1] above.

According to the electric wire assembly structure configured in [2] above, since the stopper protrusion (17) is provided on the semi-cylindrical guide wall (12b), the cable tie (50) positioned in the narrow groove (16) ) will not return to the thick groove (15) side without permission, and the fixed state of the electric wire (W) to the electrical connection box (1) can be stably maintained.

[3] Abutment surfaces (18, 19) against which the head portion (51) and the opposing outer surfaces near the head portion (51) come into contact are provided on both inner side surfaces facing each other in the width direction of the narrow groove portion (16);
The electric wire assembly structure according to [1] or [2] above.

According to the electric wire assembly structure configured in [3] above, the head portion (51) positioned in the narrow groove portion (16) and the two outer sides in the vicinity thereof are connected to the oblique contact surface (18) of the narrow groove portion (16). , 19), the head portion (51) of the binding band (50) can be stably supported without wobbling.

[4] The casing (10) is an electrical connection box (1) mounted on a vehicle, and the electric wire is a wire harness (W) connected to the electrical connection box (1).
The electric wire assembly structure according to any one of [1] to [3] above.

According to the electric wire assembly structure configured in [4] above, even when assembling the wire harness (W) to the relay box (1), which is larger in size than the wire harness (W), it is possible to By simply assembling the wire harness (W) to the relay box (1), the wire harness (W) can be fixed to the relay box (1) while keeping the wire harness (W) at the set pull-out length, thereby simplifying the work.

W Wire harness (electric wire)
WX Wire harness with cable tie (wire with cable tie)
1 Electrical junction box 10 Box body (electrical junction box)
12 Wire draw-out guide 12a Tip 12b Guide wall 15 Thick groove portion 16 Narrow groove portion 16a Position regulating portion 17 Stopper protrusion (protrusion)
18 Contact surface 19 Contact surface 50 Binding band 51 Head portion 52 Band portion 53 Insertion hole

Claims (4)

electric wire and
A binding band having a band part for wrapping around the electric wire and binding the electric wire, and a head part provided at the base end of the band part and having an insertion hole into which the tip of the band part is inserted and locked;
a guide wall protruding outward from a side wall of a housing housing the electrical components;
Equipped with
The guide wall is continuously formed with a thick groove portion and a narrow groove portion penetrating along the wire guiding direction, and the groove width of the thick groove portion is set to a size that allows the head portion to be inserted therethrough, and the groove width of the narrow groove portion is is set to a size that makes it impossible to insert the head portion,
The head portion of the binding band wound around the electric wire is inserted through the wide groove from the inside to the outside of the guide wall, and then moved to the narrow groove. the head portion is positioned;
Electric wire assembly structure. A protrusion is provided on the inner surface of the guide wall at an entrance position of the narrow groove when the head moves from the wide groove to prevent the head from moving backward from the narrow groove to the wide groove. There is,
The electric wire assembly structure according to claim 1. Abutment surfaces are provided on both inner side surfaces of the narrow groove portion facing each other in the width direction, with which the head portion and the opposing outer side surfaces in the vicinity thereof come into contact.
The electric wire assembly structure according to claim 1. The casing is an electrical connection box mounted on a vehicle, and the electric wire is a wire harness connected to the electrical connection box.
The electric wire assembly structure according to claim 1.

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