阅读说明：本技术 细长构件的保持结构 (Holding structure for elongated member ) 是由 工藤康弘 于 2018-06-15 设计创作，主要内容包括：线束(1)具备：电线(11)；捆扎带(20),其缠绕固定于电线(11)；以及壳体(30),其外装于电线(11),壳体(30)具有接纳捆扎带(20)的限制槽(46),通过捆扎带(20)卡止于限制槽(46)的槽侧面(46A),从而电线(11)相对于壳体(30)的移位被限制。根据这样的结构,通过在捆扎带(20)与槽侧面(46A)之间设定一定的余隙,从而能够吸收制造公差、组装公差。另外,即使在对电线(11)施加拉伸力的情况下,也能够抑制捆扎带(20)相对于电线(11)的缠绕位置偏移。(A wire harness (1) is provided with: an electric wire (11); a binding band (20) wound around and fixed to the electric wire (11); and a case (30) that is externally attached to the electric wire (11), wherein the case (30) has a regulating groove (46) that receives the binding band (20), and displacement of the electric wire (11) relative to the case (30) is regulated by the binding band (20) being locked to a groove side surface (46A) of the regulating groove (46). According to the structure, a certain clearance is set between the binding belt (20) and the groove side surface (46A), so that the manufacturing tolerance and the assembly tolerance can be absorbed. In addition, even when a tensile force is applied to the wire (11), the winding position of the binding tape (20) relative to the wire (11) can be restrained from being displaced.)

1. A holding structure for an elongated member, comprising:

an elongated member;

a strapping secured in a wrapping manner to the elongate member; and

an exterior member that is exterior-fitted to the elongated member,

the outer sheathing member has a regulating groove for receiving the binding band, and displacement of the elongated member relative to the outer sheathing member is regulated by locking the binding band to an inner wall of the regulating groove.

2. The elongated member holding structure according to claim 1, wherein the elongated member is an electric wire,

the exterior member is a case that holds the electric wire.

Technical Field

The technology disclosed by the present specification relates to a holding structure of an elongated member.

Background

A wire harness is known which includes an electric wire and an exterior member such as a corrugated tube externally attached to the electric wire and is wired to an automobile vehicle. In such a wire harness, in order to fix the electric wire to the exterior member, a structure has been proposed in which the exterior member is assembled to the holding member, and the electric wire and the holding member are bound with a binding tape (see patent document 1).

Disclosure of Invention

Problems to be solved by the invention

In the above-described configuration, since both the electric wire and the holding member are bundled, the electric wire is in a state in which the movement of the electric wire with respect to the holding member is hardly permitted, and the electric wire is also in a state in which the movement of the electric wire with respect to the exterior member in which the holding member is assembled is hardly permitted. Therefore, manufacturing tolerances of the counterpart member to which the electric wire is connected and assembling tolerances of the counterpart member and the wire harness cannot be absorbed, and there is a possibility that the wire harness and the counterpart member are improperly assembled. Further, since the binding band does not contact the electric wire over the entire circumference, when a strong tensile force is applied to the electric wire, the binding position of the electric wire may be displaced.

Means for solving the problems

The holding structure for an elongated member disclosed in the present specification includes: an elongated member; a strapping secured in a wrapping manner to the elongate member; and an exterior member that is attached to the elongated member, the exterior member having a regulating groove that receives the binding band, and displacement of the elongated member relative to the exterior member being regulated by the binding band being locked to an inner wall of the regulating groove.

According to the above configuration, the predetermined clearance is provided between the binding band and the inner wall of the regulating groove, so that manufacturing tolerance of the counterpart member to which the electric wire is connected and assembling tolerance of the counterpart member and the wire harness can be absorbed. Further, since the binding band can be brought into contact with the entire circumference of the elongated member, even when a tensile force is applied to the elongated member, the winding position of the binding band with respect to the elongated member can be suppressed from being displaced.

In the above configuration, the elongated member may be a wire, and the exterior member may be a case that holds the wire.

Effects of the invention

According to the technique disclosed by the present specification, it is possible to provide a holding structure of an elongated member that: which can absorb tolerance and suppress the winding position deviation of the binding tape relative to the slender component.

Drawings

Fig. 1 is a perspective view of a wire harness of the embodiment.

Fig. 2 is a plan view of the wire harness of the embodiment.

Fig. 3 is a side view of the wire harness of the embodiment.

Fig. 4 is a sectional view taken along line a-a of fig. 2.

Fig. 5 is a sectional view taken along line B-B of fig. 3.

Fig. 6 is a perspective view showing a process of winding a binding tape around an electric wire in which a case is assembled.

Fig. 7 is a cross-sectional view showing a process of winding a binding tape around an electric wire in which a case is assembled.

Detailed Description

The embodiment will be described with reference to fig. 1 to 7. The structure for holding an elongated member of the present embodiment is a part of the wire harness 1, and the wire harness 1 is assembled to a case C of a device mounted on a vehicle. The wire harness 1 includes: a terminal-equipped wire 10 provided with a wire 11 (corresponding to an elongated member); a binding band 20 wound around and fixed to the electric wire 11; and a case 30 (corresponding to an exterior member) which is externally attached to the electric wire 11.

As shown in fig. 4, the terminal-equipped wire 10 is a wire having a general structure in which a terminal fitting 12 is connected to a distal end of a wire 11. The terminal fitting 12 includes a pressure-bonding section 13 to be pressure-bonded to the end of the electric wire 11, and a connection section 14 continuous from the pressure-bonding section 13. In fig. 4, 5, and 7, the entire terminal-equipped wire 10 is schematically shown without showing a cross section in detail.

The binding band 20 is made of synthetic resin, and as shown in fig. 1 and 5, is a member having a known structure including an elongated band-shaped band portion 21 and a head portion 22 provided at one end of the band portion 21. On one surface of the band portion 21, a plurality of engaging projections in a zigzag shape are provided in a row, not shown in detail. On the other hand, the head 22 is provided with a band insertion hole 23 through which the band portion 21 can be inserted. The inner surface of the tape insertion hole 23 is provided with a locking piece, not shown in detail, and the band portion 21 is displaceable in the insertion direction but not in the withdrawal direction with respect to the head portion 22 by the locking projection being hooked on the locking piece.

The band 21 is formed in a ring shape so as to be inserted into the head 22 and the wire 11 is inserted inside the band 21, and the binding band 20 is fixed to the wire 11 so as not to be disengageably wound when fastened.

The case 30 is made of synthetic resin, and as shown in fig. 1, includes a case main body 31 and a holding portion 41 continuous from the case main body 31.

As shown in fig. 4, the housing main body 31 includes: a disk-shaped base wall portion 32 having a thickness; and a cylindrical tube portion 33 extending perpendicularly from the peripheral edge of the base wall portion 32 with respect to the base wall portion 32. The base wall portion 32 has an electric wire insertion hole 34 at a central position of the circular plate, through which the electric wire 11 can be inserted. The cylindrical portion 33 houses therein: a rubber plug 35 for sealing the space between the electric wire 11 and the inner wall surface of the cylindrical portion 33; and a stopper 36 for preventing the rubber stopper 35 from coming off. The housing main body 31 has a seal attachment groove 37 extending over the entire circumference on the outer circumferential surface, and a seal ring 38 is fitted therein, and the seal ring 38 seals between the housing main body 31 and the case C of the other device.

As shown in fig. 1, the holding portion 41 is a semi-cylindrical portion extending from a surface of the base wall portion 32 on the opposite side from the cylindrical portion 33, and is disposed concentrically with the base wall portion 32. The outer surface of the holding portion 41 has: a semicircular end face 42 parallel to the base wall portion 32; a flat surface 43 extending from a portion of the periphery of the end surface 42 forming a diameter of a semicircle to the base wall portion 32; and an arc surface 44 extending from a portion forming a semicircular arc to the base wall portion 32 (see fig. 2 and 3 as well).

As shown in fig. 2, the holding portion 41 includes: an electric wire receiving groove 45 that receives the electric wire 11 inside; and a restraining groove 46 that receives the strap portion 21 of the strap 20 therein.

As shown in fig. 2, 6, and 7, the wire receiving groove 45 is a semi-tubular groove recessed from the flat surface 43, and is defined by a groove inner surface 45A extending from the hole edge of the wire insertion hole 34 to the end surface 42.

As shown in fig. 2, 4, 6, and 7, the regulating groove 46 is a groove that is recessed outward (toward the curved surface 44) from the groove inner surface 45A, and is defined by a pair of groove side surfaces 46A (corresponding to inner walls) that are arranged parallel to the end surface 42 and face each other, and a groove bottom surface 46B that connects the pair of groove side surfaces 46A and extends while being curved so as to follow the curved shape of the curved surface 44, as shown in fig. 4 and 5. The regulating groove 46 has openings 47A and 47B at both ends, respectively, and the openings 47A and 47B open on the flat surface 43. The width of the regulating groove 46 (the distance between the pair of groove side surfaces 46A) is slightly larger than the width of the band portion 21. The depth of the regulating groove 46 (distance between the groove inner surface 45A and the groove bottom surface 46B) is larger than the thickness of the band part 21.

The steps of assembling the case 30 and the binding band 20 to the terminal-equipped electric wire 10 are, for example, the following steps.

First, as shown in fig. 6, the electric wire 11 is inserted into the electric wire insertion hole 34, and the housing 30 is assembled to the electric wire 10 with a terminal. A portion of the electric wire 11 near the end connected to the terminal part 12 is embedded in the electric wire receiving groove 45.

Next, as shown in fig. 6 and 7, the tape portion 21 of the binding band 20 is inserted from one opening 47A of the regulating groove 46 so that the tip end portion thereof is led out from the opening 47B on the opposite side around the electric wire 11. Next, the band 21 is inserted into the head 22 to form the binding band 20 into a loop shape, and the binding band is tightly fixed to the electric wire 11 so as to be wound around the electric wire 11 in a close contact state. The binding band 20 is only required to be fastened to the extent that it cannot be displaced with respect to the electric wire 11. In the case 30, as shown in fig. 3, a space defined by the base wall portion 32 and the flat surface 43 serves as a housing space 48, and the head portion 22 is disposed in the housing space 48. In addition, the tip of the extra band portion 21 is cut so as not to hinder the use.

In a state where the binding band 20 is wound around and fixed to the electric wire 11, as shown in fig. 4 and 5, the band part 21 is fitted into the inside of the regulating groove 46. When the electric wire 11 is about to be displaced relative to the housing 30 in the direction along the extending direction of the electric wire 11, the band part 21 collides against the groove side surface 46A, so that further displacement of the electric wire 11 is restricted.

When the wire harness 1 is assembled to the housing C of the device, as shown in fig. 3, the housing main body 31 is fitted into the mounting hole H provided in the housing C. The connection portion 14 of the terminal fitting 12 is connected to the counterpart terminal of the device disposed inside the case C by a bolt. Here, there is a possibility that the positions of the connecting portion 14 and the counterpart terminal may be slightly shifted due to a manufacturing tolerance of the device, an assembly tolerance of the case C and the wire harness 1, and the like.

As described above, since the width of the regulating groove 46 (the distance between the pair of groove side surfaces 46A) is slightly larger than the width of the band part 21 and a slight gap is provided between the band part 21 and the groove side surface 46A, the movement of the terminal-equipped electric wire 10 relative to the housing 30 is allowed according to the size of the gap. This allows the connection portion 14 and the counterpart terminal to be reliably connected while absorbing manufacturing tolerances and assembly tolerances.

As described above, according to the present embodiment, the wire harness 1 includes the electric wire 11, the binding band 20 wound around and fixed to the electric wire 11, and the case 30 externally fitted to the electric wire 11, the case 30 has the regulating groove 46 for receiving the binding band 20, and displacement of the electric wire 11 with respect to the case 30 is regulated by locking the binding band 20 to the groove side surface 46A of the regulating groove 46.

According to the above configuration, by setting a certain clearance between the binding band 20 and the groove side surface 46A, it is possible to absorb manufacturing tolerances of the equipment and assembly tolerances of the case C and the wire harness 1. Further, since the binding band 20 can be brought into contact with the entire circumference of the electric wire 11, even when a strong tensile force is applied to the electric wire 11, the winding position of the binding band 20 with respect to the electric wire 11 can be suppressed from being displaced.

< other embodiment >

The technology disclosed in the present specification is not limited to the embodiments described above and illustrated in the drawings, and includes, for example, the following various embodiments.

(1) In the above embodiment, one binding band 20 is wound and fixed around the electric wire 11, but two or more binding bands may be wound and fixed around the elongated member.

(2) In the above embodiment, the elongated member is an electric wire, but the type, material, and the like are not particularly limited as long as the elongated member is an elongated member, and for example, a string, a synthetic resin tube, a metal bar, or the like may be used.

(3) In the above embodiment, the exterior member is a case, but the type, material, and the like are not particularly limited as long as the exterior member is a member that is externally attached to the elongated member, and may be, for example, a synthetic resin pipe, a metal pipe, a shield case, and the like.

Description of the reference numerals

1: wiring harness (holding structure of slender component)

22: electric wire (slender component)

20: strapping tape

30: casing (external component)

46: limiting groove

46A: groove side (inner wall)