JP2007174852A - Harness protector and routing structure of hard coated wire employing it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To protect the insulation coating against wear or scratch due to interference when a wire having a hard insulation coating such as nonhalogen wire is bent repeatedly by vibration of a vehicle, or the like. <P>SOLUTION: On the end side of a trough 2 for inserting a plurality of wires 10, an interference absorber 4 enlarged outward is formed, and the inner surface on the end side of the trough 2 is made a harness protector 1 is selected to smoothly continue the curved surfaces at the end of the trough 2 onto the curved surface 8a and 9a on the inside of the interference absorber 4 in the tangential direction. A plurality of hard coated wires 10 are inserted to the inside of such the harness protector 1, such that the insulation coating 10a of the hard coated wire is brought into line contact or surface contact with the curved surfaces 8a and 9a of the interference absorber 4 when the hard coated wire vibrates or bends. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a harness protector for inserting a plurality of electric wires and protecting them from interference with the outside, and a hard-covered electric wire wiring structure using the harness protector.

  4 to 5 show an embodiment of a conventional harness protector (see Patent Document 1).

  The harness protector 21 is formed of a synthetic resin in a rectangular bowl shape, and is formed by extending a flexible harness fixing plate 23 on the distal end side of the bottom wall 22 of the bowl-shaped portion.

  The harness fixing plate 23 is gradually formed in a thin taper shape toward the tip, and is easily bent. A tape fixing protrusion 24 is formed outwardly at the tip of the harness fixing plate 23.

As shown in FIG. 4, a plurality of electric wires 25 are inserted into the harness protector, and the electric wires 25 are fixed to the harness protector 21 with a resin tape 27. As shown in FIG. 5, the harness protector 21 is attached to the vehicle body, and a wire harness (bundle wire) 26 composed of a plurality of electric wires 25 is bent and routed along, for example, the curved surface of the vehicle body. At this time, the harness fixing plate 23 is flexibly bent, and the wire harness 26 is smoothly bent without being bent excessively.
Japanese Utility Model Publication No. Hei 6-48325 (pages 9 to 10, FIGS. 6 to 7)

  The harness protector 21 having the above configuration is applied to the electric wire 25 having a flexible insulating resin coating, and is not suitable for an electric wire having a hard insulating resin coating. Examples of the electric wire having a hard insulating resin coating include a non-halogen electric wire (halogen-free electric wire), that is, an insulating resin-coated electric wire that does not contain a halogen element. Non-halogen electric wires do not generate dioxins even when burned, and are used for environmental measures.

  FIG. 6 shows a state where the electric wire having the hard insulating resin coating is attached to an existing harness protector.

  The harness protector 31 is formed of a synthetic resin in a rectangular hook shape, and has a rectangular hook-shaped portion 32 that is one step lower on the tip side. The rectangular hook-shaped portion 32 is fixed to the wire harness 35 with a resin tape 33 as a harness fixing portion. ing. The wire harness 35 includes a plurality of non-halogen electric wires 34. The wire-fixing protrusions of the harness fixing portion 32 are not shown.

  However, in the conventional harness protector 31, as shown in FIG. 7, when the wire harness 35 vibrates (swings) due to vibration during traveling of the vehicle or the like, the distal end of the rectangular saddle-shaped portion 32 of the harness protector 31. There is a concern that the hard insulating coating 34a of the non-halogen electric wire 34 may come into point contact at the inner edge 36 and cause wear or damage. Although the edge portion 36 has a slight radius (arc surface), the insulation coating 34a is worn or brittle when the hard insulation coating 34a is repeatedly bent by vibration and interferes (contacts) the edge portion 36. There is a concern that it may be easily damaged and may adversely affect the insulation performance of the non-halogen electric wire 34.

  In view of the above points, the present invention provides a harness protector in which even when an electric wire having a hard insulating coating such as a non-halogen electric wire is bent repeatedly due to vehicle vibration or the like, the insulating coating does not have to be worn or damaged due to interference. Another object of the present invention is to provide a wiring structure for a hard covered electric wire using the same.

  In order to achieve the above object, the harness protector according to claim 1 of the present invention is formed with an interference absorbing portion that is outwardly expanded on the end portion side of the hook-like portion through which a plurality of electric wires are inserted. The inner surface of the end portion side of the shape portion smoothly continues in the tangential direction to the curved surface inside the interference absorbing portion.

  With the above configuration, for example, when a plurality of electric wires vibrate (oscillate) due to vibration of a vehicle equipped with a harness protector, the electric wires are smoothly bent with a large radius along the curved surface inside the interference absorbing portion, Further contact with the curved surface is prevented. Since the wire smoothly contacts with the curved surface of the interference absorbing part instead of the edge part of the conventional harness protector by line contact or surface contact, the insulation coating may be worn or damaged by repeated contact (impact). No worries about weakening. As the electric wire, other than the hard covered electric wire, a covered electric wire having a normal hardness can be used.

  A harness protector according to a second aspect is the harness protector according to the first aspect, wherein the interference absorbing portion is configured to be surrounded on three sides by a curved wall portion.

  With the above configuration, when a plurality of electric wires vibrate in a two-dimensional direction such as an up-down direction and a left-right direction, the plurality of electric wires are large along the curved surfaces inside the three walls of the interference absorbing unit. Curves smoothly into the radius and smoothly absorbs two-dimensional vibrations and associated interference.

  A harness protector according to a third aspect is the harness protector according to the first or second aspect, wherein a hook-shaped harness fixing portion is formed between the hook-shaped portion and the interference absorbing portion.

  With the above configuration, a plurality of electric wires are fixed to the harness fixing portion by tape winding or the like before the interference absorbing portion, the outer peripheral side electric wires are tightly supported on the inner surface of the wall portion of the harness fixing portion, and the wires are attached to the harness fixing portion during vibration. Is oscillated (oscillated) along the curved surface of the interference absorbing portion. Thereby, the backlash of the electric wire at the time of vibration in the interference absorbing portion is minimized, and the vibration of the electric wire and the accompanying absorption of the interference are more smoothly and reliably performed on the curved surface of the interference absorbing portion. The interference absorbing part whose diameter is expanded from the harness fixing part also functions as a tape stopper.

  The wiring structure of the hard-covered electric wire using the harness protector according to claim 4 is configured such that a plurality of hard-covered electric wires are inserted inside the harness protector according to any one of claims 1 to 3, The insulation coating of the hard coated electric wire is brought into contact with the curved surface of the interference absorbing portion by line contact or surface contact during vibration or bending.

  With the above configuration, the insulating coating made of hard resin of the hard coated electric wire is smoothly curved with a large radius along the curved surface of the interference absorbing portion and comes into contact when the vehicle is vibrated. Is prevented. In addition, when wiring the hard-covered electric wire along the vehicle body while bending it, harmful bending of the hard-covered electric wire can be prevented by aligning the insulation coating of the hard-covered electric wire along the curved surface of the interference absorber. In addition, the stress concentration of the curved portion of the hard-coated wire is alleviated by contacting the curved surface of the interference absorbing portion in a state where the insulation coating of the hard-coated wire is curved during vibration of the vehicle or the like.

  According to the first aspect of the present invention, even when the electric wire vibrates due to the vibration of the vehicle or the like, the electric wire is smoothly bent with a large radius along the curved surface of the interference absorbing portion, so that the insulation coating of the electric wire is worn. Scratches and weakening are surely prevented, the quality of the insulation coating is ensured over a long period of time, and the concern about the insulation failure of the electric wires is solved. This effect is remarkably exhibited when a hard-coated wire is used.

  According to the second aspect of the present invention, even when the electric wire vibrates in the two-dimensional direction, the electric wire is smoothly bent with a large radius along the curved surface of each wall portion in the two-dimensional direction. Is reliably prevented from being worn, scratched or weakened.

  According to the third aspect of the present invention, when the electric wire vibrates with the harness fixing portion as a fulcrum, the vibration and interference of the electric wire are absorbed more smoothly in the interference absorbing portion following the harness fixing portion, and the insulation coating of the electric wire is worn. As a result, the quality of the insulation coating is ensured for a longer period of time, and the fear of the insulation failure of the electric wire is more reliably eliminated.

  According to the invention of claim 4, the hard covered electric wire smoothly contacts the curved surface of the interference absorbing portion during vibration of the vehicle or the like, so that wear or damage of the hard insulating coating is reliably prevented, By routing the hard-coated wire in a shape that is bent along the curved surface of the interference absorbing part, the stress concentration in the bent part of the wire is alleviated, and the brittle insulation of the hard insulation coating is surely prevented, and hard insulation The quality of the coating is ensured well over a long period of time.

  1 to 3 show an embodiment of a harness protector according to the present invention and a hard covered electric wire wiring structure using the same.

  As shown in FIG. 1 and FIG. 2, this harness protector 1 is integrally formed with a rectangular hook-shaped harness fixing portion 3 that is one step lower on the tip side of a rectangular hook-shaped portion (hook-shaped portion) 2 using a synthetic resin that is usually used. The interference absorbing part 4 formed and expanded outward (in a diameter) in a trumpet shape (curved shape) is integrally formed on the distal end side of the harness fixing part 3.

  As shown in FIG. 2, the rectangular bowl-shaped portion 2 is formed in a concave shape in cross section by the bottom wall 5 and the side walls 6 on both sides, and the harness fixing portion 3 is the same surface and the same width as the bottom wall 5 of the rectangular bowl-shaped portion 5. The bottom wall 5 and both side walls 7 that are one level lower than the both side walls 6 of the rectangular bowl-shaped part 2, and the interference absorbing part 4 curves outward from the bottom wall 5 of the harness fixing part 3. Bottom wall 8 and both side walls 9 curved outward from both side walls 7 of harness fixing portion 3. Both side walls 9 of the interference absorbing portion 4 of the present example have a shape that is gradually inclined or curved upward as the upper end surface 9b approaches the tip.

  The bottom wall 8 of the interference absorbing part 4 continues smoothly to the bottom wall 5 of the harness fixing part 3 in a tangential direction with a curved surface 8a having a large bending radius, and both side walls 9 of the interference absorbing part 4 are both side walls 7 of the harness fixing part 3. The curved surface 9a having a large bending radius continues smoothly in the tangential direction. Since the curved surfaces 8a and 9a inside the wall portions 8 and 9 of the interference absorbing portion 4 are smoothly connected to the wall portions 5 and 7 of the harness fixing portion 3 in the tangential direction, a hard covered electric wire such as a non-halogen electric wire is used. Ten hard insulating resin coatings 10a smoothly contact the curved surfaces 8a and 9a by line contact or surface contact.

  The curved surfaces 8a and 9a inside the wall portions 8 and 9 of the interference absorbing portion 4 also act as a bending regulating surface that abuts the electric wire 10 and prevents further bending. It is preferable that the boundary portion between the bottom wall 8 and both side walls 9 of the interference absorbing portion 4 continues with a smooth curved surface 11 having a substantially circular arc cross section.

  As shown in FIG. 1, a plurality of hard coated electric wires 10 such as non-halogen electric wires are inserted and accommodated in the harness protector 1, and the plurality of electric wires 10 are wound and fixed to the harness fixing portion 3 with a resin tape 12. The interference absorbing portion 4 that is expanded outwardly in a trumpet shape on the distal end side of the harness fixing portion 3 also functions as a tape stopper, and there is no need to form a conventional tape stopper protrusion.

  It is also possible to attach a substantially plate-like cover (not shown) to the upper opening 6a (FIG. 2) of the rectangular bowl-shaped part 2 in the state where the harness is fixed in FIG. The cover has, for example, a flexible locking frame piece facing downward, and is fixed by engaging the locking frame piece with an engaging protrusion provided on the rectangular bowl-shaped portion 2. The locking means is not limited to these. It is also possible to connect one side of the cover to the upper end of the rectangular bowl-shaped part 2 so as to be openable and closable with a thin hinge part.

  In the case of using a cover, the rectangular saddle-shaped part 2, the harness fixing part 3, and the interference absorbing part 4 constitute a protector body (substitute with reference numeral 1), and the cover and the protector body (1) constitute a harness protector. . Further, the plurality of electric wires 10 (wire harnesses 13) can be bundled so as not to be wrapped with a resin tape or a band.

  After the harness protector 1 of FIG. 1 is mounted on the vehicle, as shown by the chain line in FIG. 3, when the wire harness 13 vibrates in the vertical direction (swings) due to the vibration of the vehicle, the hard coating on the outer peripheral side of the wire harness 13 The insulating coating 10a of the electric wire 10 is smoothly curved with a large bending radius and a large contact area along the curved surface 8a of the interference absorbing portion 3 of the harness protector 1. When the wire harness 13 vibrates in the left-right direction, the wire harness 13 is smoothly bent with a large bending radius and a large contact area along the curved surfaces 9a (FIG. 2) of the side walls 9 of the interference absorbing portion 4. As a result, it is possible to eliminate concerns about wear, damage, and weakening of the insulating coating 10a due to repeated vibration of the hard-coated wire 10.

  It is also possible to route the wire harness 13 in a bent shape along the curved surfaces 8a and 9a of the interference absorbing portion 4 in advance in a bent shape shown by a chain line in FIG. When the harness 13 vibrates, the insulating coating 10a of the hard coated electric wire 10 on the outer peripheral side of the wire harness 13 smoothly contacts the curved surfaces 8a and 9a of the interference absorbing portion 4, so that the insulating coating 10a is worn or damaged. Vulnerability is reliably prevented.

  In the above embodiment, the inner surfaces of the walls 8 and 9 of the interference absorber 4 are curved surfaces 8a and 9a. For example, the walls 8 and 9 of the interference absorber 4 are not curved but inclined. And a smooth tangential curved surface (not shown) between the inclined surface (not shown) of each wall portion of the interference absorbing portion and the inner surface of each wall portion 5, 7 of the harness fixing portion 3. It is also possible to make it continuous. However, in this case, since the radius of the curved surface is smaller than the curved surfaces 8a and 9a of the interference absorbing portion 4 described above, the bending radius of the electric wire 10 is also reduced, and stress concentration at the electric wire bending portion is likely to occur. can not deny.

  In addition, in FIG. 1, the upper surface 9 b of the side wall 9 of the interference absorbing unit 4 can be formed straight in the horizontal direction in the same manner as the upper surface of the side wall 7 of the harness fixing unit 3. When it is clear that the vibration direction of the wire harness 13 is only the vertical direction (one-dimensional direction), in FIG. 2, only the bottom wall 8 of the interference absorbing portion 4 is formed in a curved or inclined shape, Both side walls 9 of the interference absorbing portion 4 can be made to face vertically without curvature similar to the harness fixing portion 3.

  In the embodiment of FIG. 2, the height of the curved side walls 9 of the interference absorber 4 is preferably set to be larger than the radius of the wire harness 13 as shown in FIG. 1. It is also possible to set the heights of the harness fixing portion 3 and the interference absorbing portion 4 to be the same as the height of the rectangular bowl-shaped portion 2.

  It is also possible to form the interference absorbing part 4 directly at the end of the rectangular bowl-like part 2 without forming the harness fixing part 3. In this case, the wire harness 13 is fixed by, for example, winding the resin tape 12 directly around the rectangular hook-shaped portion 2 or providing band insertion holes (not shown) on both sides of the bottom wall 5 of the rectangular hook-shaped portion 2. It is also possible to bind the wire harness 13 with a band passing through the insertion hole. Instead of the rectangular bowl-shaped part 2, it is also possible to use a bowl-shaped part such as a semicircle, and to directly form the interference absorbing part (4) at the end of the semi-circular bowl-shaped part (2).

  Further, in FIG. 2, the harness protector 1 is made thicker, the inner surfaces 8a and 9a of the interference absorbing portion 4 are made curved surfaces or inclined surfaces as they are, and the outer surface of the interference absorbing portion 4 is not curved but the harness fixing portion 3 It is also possible to have a straight flat surface that is the same as the outer surface of the hook-shaped portion 4. However, in this case, since the weight of the harness protector increases and a large amount of resin material is required, the inner surface 8a, 9a and the outer surface of the form shown in FIG. preferable.

  In the present specification, the vertical and horizontal directions are merely for convenience of explanation, and do not always coincide with the mounting direction of the harness protector 1. As shown in FIG. 4 of the conventional example, the harness protector 1 may be mounted with the bottom wall 5 facing up.

  The harness protector 1 generally has similar end portions in the longitudinal direction, and one end portion of the harness protector 1 is described in FIGS. 1 to 3, and the other end portion. It is preferable to provide the same harness fixing portion 3 and interference absorbing portion 4. In a harness protector that intersects in a T-shape, it is preferable to provide a similar harness fixing portion 3 and interference absorbing portion 4 at three ends. Even in these cases, it is possible to eliminate the harness fixing portion 3 and continuously form the interference absorbing portion 4 directly on the bowl-shaped portion 2.

  Moreover, although the said embodiment demonstrated as the rectangular saddle-shaped harness protector 1, for example, the shape of the saddle-like part 2 and the harness fixing | fixed part 3 of the harness protector 1 was made into the semicircle hook shape of a cross-sectional semicircle (semi-annular) shape, It is also possible to make the shape of the interference absorbing part 4 into a trumpet shape with a semicircular cross section (semi-annular) whose diameter is expanded from the harness fixing part 3 in a curved or inclined shape. Even in this case, it is possible to eliminate the harness fixing portion 3 and continuously form the interference absorbing portion 4 directly on the bowl-shaped portion 2.

  Further, it goes without saying that the same effect as that of the hard covered electric wire 10 is exhibited even when a covered electric wire having an insulating resin coating having a normal hardness is inserted and accommodated in the harness protector 1 instead of the hard covered electric wire 10. .

It is a side view which shows one Embodiment of the wiring structure of the harness protector which concerns on this invention, and a hard covering electric wire using the same. It is a perspective view which shows the principal part of a harness protector similarly. It is principal part sectional drawing which shows the state which the wire harness bent by vibration etc. in the harness protector. It is a perspective view which shows one form of the conventional harness protector. Similarly, it is principal part sectional drawing which shows one form of the wiring structure of the electric wire using the conventional harness protector. It is a side view which shows the other form of the conventional harness protector. Similarly it is principal part sectional drawing which shows the problem of the conventional harness protector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Harness protector 2 Gutter-shaped part 3 Harness fixing | fixed part 4 Interference absorption part 8a, 9a Curved surface 8 Bottom wall (wall part)
9 Both side walls (wall)
10 Hard coated wire (electric wire)
10a Insulation coating

Claims (4)

  An interference absorbing portion that is expanded outward is formed on the end portion side of the hook-shaped portion through which a plurality of electric wires are inserted, and the inner surface of the end portion side of the hook-shaped portion is tangent to the curved surface inside the interference absorbing portion. A harness protector characterized by smooth running in the direction.   The harness protector according to claim 1, wherein the interference absorbing portion is configured to be surrounded on three sides by a curved wall portion.   The harness protector according to claim 1 or 2, wherein a hook-like harness fixing part is formed between the hook-like part and the interference absorbing part.   A plurality of hard-coated wires are inserted inside the harness protector according to any one of claims 1 to 3, and when the hard-coated wires are vibrated or bent, the insulation coating of the hard-coated wires is curved in the interference absorbing portion. A hard-covered electric cable routing structure using a harness protector characterized by being brought into contact with a surface by line contact or surface contact.

Images