JP4588516B2 - Corrugated tube for harness and wire harness using the same - Google Patents

Description

  The present invention relates to a corrugated tube for harness that suppresses axial stretchability and secures flexibility, and a wire harness using the same.

  FIG. 14 shows one embodiment of a conventional corrugated tube for harness and a wire harness using the same.

  The corrugated tube 21 is made of synthetic resin as a material, and is formed by integrally forming circumferential annular ridges 8 and grooves 9 alternately in the axial direction, and has good flexibility. .

  The ridge 8 of the corrugated tube 21 is adjacent to the groove 9, the groove 9 is located between the front and rear ridges 8, the ridge 8 forms a peak, the groove 9 forms a valley, and the ridge. The inside of 8 is formed in the shape of a hollow groove, and the ridge 8 and the groove 9 are positioned symmetrically in a rectangular wave shape in cross-sectional shape.

  A plurality of electric wires 15 a are inserted into the inner space of the corrugated tube 21, and in this example, the front and rear ends of the corrugated tube 21 are fixed to the electric wire bundle (main line) 15 with the vinyl tape winding 14, and the corrugated tube 21 has an intermediate portion in the longitudinal direction. The locking clip 13 is fixed. The corrugated tube 21 protects the electric wire 15a from interference with the outside. In this example, a wire harness 22 is configured by the wire bundle (main line) 15, the wire bundle (branch line) 16, the corrugated tube 21, and the locking clip 13.

  The locking clip 13 of this example is made of synthetic resin, and includes a fixing band portion 23, a dish-shaped spring portion 24, a column portion 25 protruding from the center of the spring portion 24, and a distal end side of the column portion 25. A pair of tapered flexible claws 26 are provided. The band portion 23 includes a sawtooth projection (not shown) and a frame-like portion (not shown) for inserting and locking the projection.

  The locking clip 13 is fastened and fixed to the outer periphery of the corrugated tube 21 by the band portion 23. The pair of claws 26 are inserted and locked in holes (not shown) of the vehicle panel, and at the same time, the spring portion 24 comes into elastic contact with the panel surface, and the wire harness 22 is fixed to the vehicle panel. A plate portion (not shown) may be formed instead of the band portion 23, and the plate portion may be fixed to the corrugated tube 21 by tape winding.

  The portion of the wire bundle 15 where the corrugated tube 21 is not mounted is roughly wound with vinyl tape. The wire bundle 15 is branched at both front and rear ends of the corrugated tube 21, and the branch line 16 extends (intersects at right angles) to the trunk line 15. Connectors (not shown) are provided at the terminals of the trunk line 15 and the branch line 16.

The position of the locking clip 13 in this example is defined by distances L ₁ and L ₂ from a branch point that is an intersection of the branch line 16 and the main line 15. The corrugated tube 21 is not limited to a circular cross section, and an oval cross section or a flat type may be used according to the wiring location of the wire harness 22 or the like.

  As a corrugated tube, the thing of a form as shown, for example in FIGS. 15-16 is also conventionally disclosed.

  A corrugated tube 51 shown in FIG. 15 is formed in a circular shape in cross section, and is formed by cutting out a part of a plurality of circumferential protrusions 52 to form a recess 54 (see Patent Document 1).

  The corrugated tube 51 is cut in the vicinity of the concave portion 54, and a projection on the inner surface of a cylindrical coupling (not shown) is inserted into the concave portion 54 and locked in the middle of the concave groove 53 between the ridges. Two corrugated tubes are connected to each other.

  A corrugated tube 55 shown in FIG. 16 is formed in a flat shape, and a plurality of circumferential ridges 56 are formed with recesses 58, and the recesses 58 and grooves 57 between the ridges are communicated (patent). Reference 2).

Each recess 58 is provided diagonally on the front and back of the long side portion of the corrugated tube 55. The corrugated tube 55 is embedded in the concrete for construction, and the recess 58 functions as an air vent when the corrugated tube is crushed.
Japanese Utility Model Publication No. 3-194 (FIG. 1) Japanese Utility Model Publication No. 2-139413 (FIG. 1)

  However, in the corrugated tubes 21, 51, and 55 of each form of FIGS. 14 to 16, for example, as in the wire harness 22 of FIG. 14, the locking clip 13 is assembled to the corrugated tube 21 in the wire harness manufacturing process. After that, until the wire harness 22 is attached to the vehicle, an external force such as compression, tension or bending acts on the corrugated tube 21, and the corrugated tube 21 contracts or extends, so that the position of the locking clip 13 changes. There is a problem that the locking clip 13 is displaced with respect to a predetermined mounting hole such as a vehicle panel, and the wiring (fixing) workability of the wire harness 22 is deteriorated.

  This problem may occur not only in the locking clip 13 but also in parts such as a synthetic resin holder attached to the corrugated tube 21. For example, the holder (not shown) is fixed by engaging a rib (not shown) with the concave groove 9 of the corrugated tube 21.

  In view of the above-described points, the present invention uses a corrugated tube for a harness that can reliably prevent displacement of a mounting part on the outer periphery of the tube due to expansion and contraction in the longitudinal direction of the tube when assembled as a wire harness, for example. The primary object is to provide a wire harness. In addition, a second object is to provide a corrugated tube for a harness that secures flexibility (flexibility) in the tube radial direction and a wire harness using the same.

In order to achieve the above object, a harness corrugated tube according to claim 1 of the present invention is a flexible corrugated tube for harness having a plurality of hollow ridges and grooves in the circumferential direction alternately in the axial direction. , the external force receiving unit to suppress the expansion and contraction of the tube axis direction by the convex strip and concave grooves, discontinuously and one by one arranged in the circumferential direction at equal intervals in the tube circumferential direction of the spiral on the trajectory in the longitudinal direction of the tube A harness corrugated tube formed , wherein the external force receiving portion is formed in one or a plurality of protruding ridges or grooves .

With the above configuration, each external force receiving portion increases the rigidity in the tube axial direction to suppress deformation (extension / contraction) in the tube axial direction due to tensile force or compressive force, and each external force receiving portion is arranged uniformly in the tube circumferential direction. Therefore, the corrugated tube can be flexed flexibly in any direction. Here, “uniform” means that the external force receiving portions may be arranged at equal intervals (equal angles) in order or may be arranged at equal intervals (equal angles) in any order. When the corrugated tube has a circular cross section, the equidistant distance = equal angle. However, when the corrugated tube has an elliptical cross section or a flat corrugated tube, each external force receiving portion is arranged at an equal distance (unequal angle). It is preferable. Then, the corrugated tube is bent with a uniform force in any direction, and the torsional force acting on the corrugated tube is uniformly absorbed, so that the corrugated tube is flexibly twisted and deformed to some extent.
Further, a portion having no external force receiving portion is formed in the longitudinal direction of the tube, and the flexibility in the bending direction is enhanced by the portion. Each external force receiving portion is formed in the axial direction in one or more ridges or grooves.

The harness corrugated tube according to claim 2 is characterized in that, in the harness corrugated tube according to claim 1 , the external force receiving portion is formed for each of one or a plurality of the ridges or grooves.

  With the above configuration, when each external force receiving part is formed for each one ridge or groove, the flexibility of the corrugated tube in the bending direction is further increased, and each external force receiving part is provided for each of the plurality of ridges or grooves. When formed, although the flexibility in the bending direction is inferior to the former, the rigidity in the axial direction is increased.

A harness corrugated tube according to a third aspect is the harness corrugated tube according to the first or second aspect , wherein the external force receiving portion is a hollow convex portion that connects the ridges.

With the above configuration , the protrusions are connected to each other in the longitudinal direction of the tube by the protrusions, the rigidity between the protrusions is increased, and the grooves are prevented from expanding and contracting in the axial direction. Furthermore, since each convex portion during bending of the co Le gate tube are independent discontinuous, bending is performed flexibly. The height of the protrusion (position in the tube radial direction) may be the same as the height of the protrusion or may be lower than the protrusion.

A harness corrugated tube according to claim 4 is a flexible corrugated tube for harness having a plurality of hollow ridges and grooves in the circumferential direction alternately in the axial direction, and the tube formed by the ridges and the grooves. The external force receiving portion that suppresses expansion and contraction in the axial direction is a corrugated tube for a harness that is discontinuously arranged in the tube longitudinal direction and arranged one by one in the circumferential direction at regular intervals on a spiral trajectory in the tube circumferential direction, The external force receiving portion is a concave portion that linearly crosses each ridge and the groove.

With the above configuration, each external force receiving portion increases the rigidity in the tube axial direction to suppress deformation (extension / contraction) in the tube axial direction due to tensile force or compressive force, and each external force receiving portion is arranged uniformly in the tube circumferential direction. Therefore, the corrugated tube can be flexed flexibly in any direction. Here, “uniform” means that the external force receiving portions may be arranged at equal intervals (equal angles) in order or may be arranged at equal intervals (equal angles) in any order. When the corrugated tube has a circular cross section, the equidistant distance = equal angle. However, when the corrugated tube has an elliptical cross section or a flat corrugated tube, each external force receiving portion is arranged at an equal distance (unequal angle). It is preferable. Then, the corrugated tube is bent with a uniform force in any direction, and the torsional force acting on the corrugated tube is uniformly absorbed, so that the corrugated tube is flexibly twisted and deformed to some extent.
Further, the concave portion traverses the ridge in the tube axis direction, and the wall portion is positioned so as to face the notched transverse portion, and the rigidity of the ridge in the tube axis direction is increased by the wall portion. Thereby, the expansion and contraction of the corrugated tube is suppressed. The concave portion is more flexible in the corrugated tube than the convex portion. Moreover, since each recessed part is discontinuous and independent, the flexibility of a corrugated tube increases further. The concave portion may be formed at the same height as the ridge (in this case, the concave groove and the bottom surface of the concave portion coincide with each other), or the concave groove may be formed in a linear shape by being dented radially inward.

The wire harness according to claim 5 is formed by inserting an electric wire inside the corrugated tube for harness according to any one of claims 1 to 4 and fixing components on the outer peripheral side of the corrugated tube for harness. Wire harness.

With the above structure, since the axial direction of expansion and contraction of the co Le gate tube is suppressed by the external force receiving portion, position of the part fixed to the corrugated tube is defined always normal position without variation. Further, the while being flexibly bent wiring with corrugated tube Wa unpleasant harness for example along the bending surface of the vehicle body. The component may be provided in the middle portion in the longitudinal direction of the corrugated tube or may be provided at the end of the corrugated tube. Examples of the parts include a locking clip that engages with a hole in the vehicle panel. The number of parts may be one or more.

According to the first aspect of the present invention, the fluctuation of the length of the corrugated tube is suppressed by each external force receiving portion, the position of the corrugated tube mounting part is accurately defined, and the workability of assembling the wire harness to the vehicle is improved. When the wire harness including the corrugated tube is bent, the corrugated tube does not expand and contract in the axial direction, and the tensile force or compressive force does not act directly on the internal electric wire, so the bending durability and life of the electric wire are reduced. In addition to improving, each external force receiving portion is uniformly arranged in the circumferential direction, so that the corrugated tube can be flexed easily and flexibly in any direction, and the three-dimensionally bent portion of the vehicle body The wiring workability of the wire harness to the etc. is improved. In addition, the corrugated tube is more flexible and the wiring workability of the wire harness is improved, and the corrugated tube absorbs the twisting force uniformly against the twisting force acting on the corrugated tube, and the corrugated tube is twisted and damaged. Is prevented. In addition, the corrugated tube is more flexible at the portion where there is no external force receiving portion, and the wiring workability of the wire harness is further improved.

According to invention of Claim 2 , when each external force receiving part is formed for every one protruding item | line or a ditch | groove, the flexibility of the bending direction of a corrugated tube increases further, and the wiring workability | operativity of a wire harness is improved. Further improvement. In addition, when each external force receiving part is formed for each of a plurality of ridges or grooves, the axial rigidity is further increased, and fluctuations in the length of the corrugated tube are further suppressed to more accurately define the position of the mounted part. In addition, the load in the axial direction of the electric wire inside the tube can be further reduced.

According to the invention described in claim 3 , since the protrusions are connected by the protrusions, the rigidity in the longitudinal direction of the tube is increased, and the expansion and contraction of the corrugated tube is surely suppressed. To be demonstrated.

According to the fourth aspect of the present invention, the variation in the length of the corrugated tube is suppressed by each external force receiving portion, the position of the mounting part of the corrugated tube is accurately defined, and the workability of assembling the wire harness to the vehicle is improved. When the wire harness including the corrugated tube is bent, the corrugated tube does not expand and contract in the axial direction, and the tensile force or compressive force does not act directly on the internal electric wire, so the bending durability and life of the electric wire are reduced. In addition to improving, each external force receiving portion is uniformly arranged in the circumferential direction, so that the corrugated tube can be flexed easily and flexibly in any direction, and the three-dimensionally bent portion of the vehicle body The wiring workability of the wire harness to the etc. is improved. In addition, the corrugated tube is more flexible and the wiring workability of the wire harness is improved, and the corrugated tube absorbs the twisting force uniformly against the twisting force acting on the corrugated tube, and the corrugated tube is twisted and damaged. Is prevented. Also, increasing the stiffness of the convex at the recess, the expansion and contraction of the corrugated tube Ru suppressed reliably.

According to the fifth aspect of the present invention, since the expansion and contraction of the corrugated tube in the axial direction is suppressed by the external force receiving portion, and the position of the component is always in a normal position without variation, the component is displaced to a predetermined location such as a vehicle. Can be efficiently and reliably assembled, and the workability of assembling the wire harness to the vehicle or the like is improved.

  1 to 2 (a) and 2 (b) show a first embodiment of a corrugated tube for harness according to the present invention.

The corrugated tube 3 _1, a conventional well as synthetic resin as a material, the circumferential direction of the annular and convex strips 8 and the grooves 9 alternately arranged in longitudinal direction of the tube is formed in a circular cross-section, the tube longitudinal it is characterized in that the formation of the linear convex external force receiving portion 4 ₁ of a single direction.

The external force receiving portion 4 ₁ is a convex portion formed continuously straight in the tube axis direction orthogonal to the circumferential direction of the ridge 8 and the groove 9. When a portion composed of the convex strips 8 and the concave grooves 9 excluding the convex portion 4 ₁ is referred to as a tube main body, the convex portion 4 ₁ is linearly formed in the axial direction of the tube main body.

Protrusions 4 ₁ is followed straight in the longitudinal direction of the tube at the same height as the projections 8 perpendicular to 8 i.e. ridges plurality of projections in the circumferential direction of the annular. Groove 9 That valley between Kakutotsujo 8 is traversed by the protrusion 4 _1, left and right wall surfaces 4a of the projections 4 _1, 4b are orthogonal to the bottom surface of the groove 9 (substituted by reference numeral 9), and It is orthogonal to the front and back wall surfaces 8a, 8b of the ridges 8.

The thickness of the walls of the ridge 8 and the groove 9 and the convex portion 4 ₁ is substantially the same, harness inserting space 10 of the tube inside the inner surface of the ridge 8 and the projecting portion 4 ₁ is recessed concave groove Communicating with Outer and inner surfaces of the convex portion 4 ₁ is curved in an arc shape in the circumferential direction at the same bending radius as the outer peripheral surface and inner peripheral surface of the ridges 8.

Each ridge 8 by the tube axis direction of the straight protrusions 4 ₁ is integrally connected to the transverse direction, the left and right wall portions 4a of the protruding portions 4 _1, the rigidity of the tube axis direction of the ridge 8 and the groove 9 by 4b that stiffness of the tube body is up, convex strips 8 and the groove 9 is less likely to stretch the tube axis direction, it expansion and contraction of the corrugated tube 3 _first axis direction is suppressed by.

Further, it is possible to conventional be easily bent in the same manner if the direction other than the direction of the corrugated tube 3 ₁ a convex portion 4 ₁ opposite the 180 °, somewhat convex portion 4 ₁ and in its 180 ° opposite direction Therefore, there is no fear of adversely affecting the wiring property of the wire harness to the vehicle or the like.

  3 (a) and 3 (b) show a second embodiment of the harness corrugated tube according to the present invention.

The corrugated tube 3 _2, a conventional well as synthetic resin as a material, the circumferential direction of the annular and convex strips 8 and the grooves 9 alternately arranged in longitudinal direction of the tube is formed in a circular cross-section, the tube longitudinal it is characterized in that the formation of the linear concave external force receiving portion 4 ₂ of the one direction.

The external force receiving portion 4 ₂ is a concave portion formed continuously straight in the tube axis direction orthogonal to the circumferential direction of the ridge 8 and the groove 9.

Recess 4 ₂ is followed straight in the longitudinal direction of the tube at the same height as the as transverse to the groove 9 i.e. valleys to notch the ridges 8 That crests in the circumferential direction of the annular. Recess 4 ₂ of the left and right wall surfaces 4c, 4d are orthogonal to the bottom surface of the groove 9 (substituted by reference numeral 9), and and perpendicular to the outer peripheral surface of the ridges 8 (substituted by reference numeral 8). The bottom surfaces of the concave portion 4 ₂ and the concave groove 9 (in place of the reference numerals 4 ₂ and 9) are located on the same curved surface. The thickness of the walls of the ridge 8 and the groove 9 and recess 4 ₂ is substantially the same, the inner surfaces of the projections 8 is in communication with the harness inserting space 10 of the tube inner recessed groove shape.

Notch transverse to the ridge 8 (transverse portion) (substituted by reference numeral 4 ₂₎ is formed by the recess 4 _2, opposed walls 4c of the left and right of the notch, the tube axis direction of the projections 8 by 4d rigidity up, ridges 8 is less likely to stretch the tube axis direction, whereby the axial expansion and contraction of the corrugated tube 3 ₂ is suppressed.

According to the second embodiment, the corrugated tube 3 ₂ can be easily bent in any direction, that is, up and down, left and right, that is, in any direction orthogonal to the axial direction. For example, the external force of the corrugated tube 3 ₂ along the curved surface of the vehicle body. efficiently wire harness without having to worry about the position of the receiving part 4 ₂ can be laid.

In FIG. 3, it is also effective by bulging the recess 4 ₂ on the inner surface of the groove 9 (harness inserting space 10 side) is formed in a straight line in the longitudinal direction of the tube. In this case, the FIG. 3 (b) in the wall surface 4c of the upper and lower recesses 4 ₂ across the ridges 8, 4d is also formed in the groove 9.

  FIG. 4 shows a third embodiment of the corrugated tube for harness according to the present invention.

The corrugated tube 3 _3, a conventional well as synthetic resin as a material, the circumferential direction of the annular and convex strips 8 and the grooves 9 alternately arranged in longitudinal direction of the tube is formed in a circular cross-section, the tube longitudinal it is characterized in that the formed heights of the lower convex external force receiving portion 4 ₃ in a straight line in the direction.

The external force receiving unit 4 ₃ is a low convexes perpendicular to the circumferential direction of the ridge 8 and the groove 9 height formed straight in the tube axis direction.

Protrusions 4 ₃ are formed on approximately half the height of the convex portion 4 ₁ of Figures 1-2, protrusions 4 ₃ across each groove 9 in the circumferential direction, the circumferential direction of the front and rear of each ridge 8 The top surface of the convex portion 4 ₃ (substitute with reference numeral 4 ₃ ) is orthogonal to the intermediate portion in the height direction of the wall surfaces 8a and 8b. Each convex portion 4 ₃ extends straight in the tube longitudinal direction via each convex strip 8. The thickness of the walls of the ridge 8 and the groove 9 and the convex portion 4 ₃ is substantially the same, harness inserting space 10 of the tube inside the inner surface of the ridge 8 and the projecting portion 4 ₃ recessed concave groove Communicating with Outer and inner surfaces of the projections 4 ₃ is curved in an arc shape in the circumferential direction on the outer peripheral surface and inner peripheral surface concentric with the ridges 8.

The height of the convex portion 4 ₃ is not limited to ½ of the height of the ridge 8, such as 2/3 or 1/3, etc., if necessary, that is, the magnitude of external force such as tension or compression acting on the corrugated tube 3 ₃ The height can be appropriately set according to the height. The convex portion 4 ₁ having the same height as the convex strip 8 in FIGS. 1 to 2 exhibits the largest receiving force with respect to the external force.

  FIGS. 5-7 shows the example which formed each said external force receiving part 4 in the corrugated tube of cross-sectional oval shape.

Corrugated tube 3 ₄ of Figure 5 has a convex portion 4 ₁ is a force-receiving portion of Figure 2, the corrugated tube ₃₅ in FIG. 6 has a recess 4 ₂ is a force-receiving portion of FIG. 3, FIG. 7 The corrugated tube 3 ₆ has a low convex portion 4 ₃ which is the external force receiving portion of FIG.

Figure 8 shows an example of forming the external force receiving portion 4 ₁ in the corrugated tube 3 ₇ cross section flat. This corrugated tube 3 ₇ has a convex portion 4 ₁ which is an external force receiving portion in FIG. 2, but has a concave portion 4 _{2 in} FIG. 3 and a low convex portion 4 ₃ in FIG. 4 instead of the convex portion 4 ₁ . Of course, it is also effective.

In the corrugated tubes 3 _{4 to} 3 ₇ of FIGS. 5 to 8, each external force receiving portion 4 is provided at the center in the radial direction of the long side portion 3 a. It is also possible to provide the external force receiving portion 4 at the center of the short side portions 3c and 3d. It is also effective to form a straight line in deeper recessed to the inside of the groove 9 of the corrugated tube a recess 4 ₂ of FIG. The corrugated tubes 3 _{4 to} 3 _{7 in} FIGS. 5 to 8 are collectively referred to as corrugated tubes having a long cross section.

FIG. 9 shows an embodiment in which the wire harness 12 is configured using the corrugated tube 3 ₁ of FIG. 2 as an example of each corrugated tube. Corrugated tubes 3 _{2 to} 3 ₇ in FIGS. 3 to 8 may be used instead of the corrugated tube 3 ₁ in FIG.

Corrugated tube 3 _first longitudinal engagement clip in the intermediate portion (part) 13 is mounted fixed, the front and rear ends of the corrugated tube 3 ₁ is secured to the main line 15 of the wire harness 12 in the tape winding 14, the corrugated tube 3 ₁ before and after A branch line 16 is branched in the vicinity of the end. Reference numerals L ₁ and L ₂ are distances from the respective branch points to the locking clip 13. Since the structure of the locking clip 13 is the same as the conventional one, the description thereof is omitted.

External force receiving portion 4 ₁ of the corrugated tube 3 ₁ in this example is arranged on the upper side in plan view, it is formed over the entire length of the corrugated tube 3 _1. When placing the trunk 15 of the wire harness 12 in a straight line as in this embodiment, the position of the external force receiving portion 4 ₁ may be anywhere on the periphery of the corrugated tube 3 _1.

Since the external force receiving portion 4 ₁ increases the rigidity of the corrugated tube 3 _{1 in} the longitudinal direction, the wire harness 12 is tensioned or compressed between the manufacturing process of the wire harness 12 and the mounting of the wire harness 12 to the vehicle. even when subjected to force, corrugated tube 3 ₁ longitudinally arrow D, without having to stretch deformation in the E direction, whereby the position of the locking clip 13 is defined always in place. Thereby, the displacement of the locking clip 13 with respect to a hole (not shown) such as a vehicle panel is prevented, and the engagement work of the locking clip 13 with the vehicle panel is performed efficiently and accurately.

This effect is not limited to the locking clip 13, it is achieved also in the case where a part such as a synthetic resin holder is fixed to the corrugated tube 3 _1.

When the 9 by bending the trunk 15 of the wire harness 12 is routed in the vehicle body or the like, place the external force receiving portion 4 ₁ in a position 90 ° out of phase to the bending direction of the corrugated tube 3 ₁ of the trunk line 15 or, preferably in ensuring flexibility it is possible to dispose the external force receiving portion 4 ₁ so as to bend inward. Bending direction of the wire harness 12 in FIG. 9 is the extending direction (or opposite direction) or an upward direction of the branch line 16 (protruding direction of the convex portion is a force-receiving portion 4 _1).

In the case of the corrugated tubes 3 _{4 to} 3 _{7 having} a long cross section in FIGS. 5 to 8, the bending direction can be on either the long diameter side or the short diameter side, but the position of the external force receiving portion 4 is a circular corrugated tube having a circular cross section. Similarly to 3 _{1 to} 3 ₃ , it is preferably 90 ° or inward of the bending direction.

For example, in FIG. 9 or the like, when the main wire 15 of the wire harness is strongly bent or repeatedly bent, the conventional corrugated tube expands and contracts together with the internal electric wires 15a, and the electric wires 15a are compressed or expanded in the direction of extension. force acts, there is a concern that adversely affect the durability of the electric wires 15a, provided with a force receiving portion 4 ₁ in the corrugated tube 3 _1, since receiving the tensile force and compressive force by an external force receiving portion 4 The tensile force or the compressive force does not directly act on the internal electric wire 15a, so that the bending durability and the life of the electric wire 15a are improved.

  In each of the above embodiments, only one external force receiving portion 4 is provided in the corrugated tube 3, but when the wire harness 12 is not bent so much, two or more external force receiving portions 4 are provided. It is also possible.

  10 to 11 show a fourth embodiment of the corrugated tube for harness according to the present invention.

The corrugated tube 3 _8, a synthetic resin as a material, the circumferential direction of the ridge (peak portions) 8 (8 ₁ to 8 _n) and the groove (valley) 9 (9 ₁ ~9 _n) and arranged alternately wherein in the formation and a circular cross section of the corrugated tube comprising, that is formed by changing the position in the tube circumferential direction protrusion 5 of the tube-axis direction (5 ₁ to 5 _n) in the ridges each one crest of the external force receiving portion It is what.

As shown in FIG. 11, the convex portion 5 is formed by changing its position at an angle equal to the circumferential direction. In this example, the convex portions 5 are provided equally at six locations in the circumferential direction, and the angle formed by each convex portion 5 is 60 °. When the portion composed of the ridges 8 and the concave grooves 9 excluding the convex portions 5 is referred to as a tube body, the convex portions 5 are arranged uniformly in a spiral manner at an angle of 60 ° on the circumference of the tube main body. Is distributed. Sectional shape of each protrusion 5 has a vertical wall 5a, 5b of the left and right width direction as in the convex portion 4 ₁ of the embodiment of FIG.

  As in the first embodiment of FIG. 1, the protrusion 5 is the same as the protrusion 8 perpendicular to the front and rear wall surfaces 8 a and 8 b between the protrusions 8 (in the groove 9). It is formed at a height. The outer surface of the convex portion 5 is curved in an arc shape in the circumferential direction with the same bending radius as the outer peripheral surface of the ridge 8. The width W of the convex portion 5 is appropriately set as necessary in consideration of the rigidity in the axial direction and the flexibility in the bending direction. The same applies to the embodiment of FIG.

The first convex portion 5 ₁ located in the first and second projections _81, 82 between (first groove 9 ₁₎ from the left in FIG. 10, the second convex portion 5 _Paragraph The first protrusion 5 ₂ is located between the second and third protrusions 8 ₂ and 8 ₃ (second concave groove 9 ₂ ) at an interval of 60 °, and the third protrusion 5 ₃ located in one of the 120 ° interval from the convex portion 5 ₁ third and fourth projections _{83, 84} during the (third grooves 9 _3), the fourth protrusions 5 ₄ of the located in one of the 180 ° interval from the convex portion 5 ₁ fourth and fifth projections 8 _4, 8 ₅ between (the fourth groove 9 _4), the fifth convex part 5 ₅ second located between one of the 240 ° interval from the convex portion 5 ₁ of the fifth and sixth projections 8 _5, 8 ₆ (fifth groove 9 _5), a sixth protrusion 5 ₆ No. located between one of the 300 ° interval from the convex portion 5 ₁ of the sixth and seventh projections 8 _6, 8 ₇ (sixth groove 9 _6), the protrusions 5 ₇ of the seventh to the the same axis line as one of the projections 5 ₁ If located between the eighth projections 8 _7, 8 ₈ (seventh groove 9 _7), the convex portion 5 between (the recessed grooves 9) of all of the projections 8 by repeating this less They are arranged at equal intervals.

In addition, the arrangement | positioning angle of the circumferential direction of the convex part 5 is not restricted to 60 degrees, What is necessary is just to arrange | position uniformly in the circumferential direction at equal angles, such as 30 degrees, 45 degrees, and 90 degrees. For example, in the case of 90 °, the first protrusion 5 ₁ is positioned between the first and second projections _81, 82, first between the second and third projections _82, 8 ₃ second convex portion 5 ₂ is positioned at the first 90 ° interval between the convex portions 5 _1, the third convex portion ₃ is first between the third and fourth projections _{83, 84} located at 180 ° intervals between the convex portions 5 ₁ of the fourth and fifth projections 8 _4, 8 ₅ between the fourth convex portion ₄ is first 270 ° and projecting portion 5 ₁ located at intervals, the fifth convex part 5 ₅ between the fifth and sixth projections 8 _5, 8 ₆ is positioned on the first convex portion 5 ₁ and the same axis, following repeated this The convex portions 5 are arranged at regular intervals between the convex strips 8.

Further, in the embodiment of FIG. 10 described above, the first to nth convex portions 5 are arranged in a spiral in order. However, if the convex portions 5 are evenly distributed on the tube circumference, the order is not necessarily in the order. need not be arranged, the third convex portion 5 ₃ of FIG. 10 is disposed in the first protrusion 5 of _the following in FIG. 10, for example (between the second and third projections _82, 8 ₃₎ Next, the fourth protrusion 5 ₄ of FIG. 10 is arranged (between the third and fourth protrusions 8 ₃ , 8 ₄ ), and the next (fourth and fifth protrusions 8 ₄ , 8). equal to ₅ during) placing a second convex portion 5 ₂ of FIG. 10, it is also possible to arrange the convex portions 5 at the same angular pitch randomly.

Further, instead of the protrusions 5 as an external force receiving portion, or a recess 4 ₂ of the second embodiment of FIG. 3, to form a third embodiment height lower protrusions 4 ₃ in the form of the Fig 4 May be. If recess 4 _2, the Kakutotsujo 8 recesses 4 ₂ are formed across the tube axis direction, the first recess 4 ₂₁ not shown in the first projections ₈₁ are located, the second projections the second recess 4 ₂₂ are positioned at an angle θ ° intervals from the first recess 4 ₂₁ 8 _2, the third recess 4 ₂₃ to the third ridges 8 ₃ and the first recess 4 ₂₁ located at 2θ ° intervals, recesses fourth projections 8 ₄ fourth recess 4 ₂₄ positioned at 3θ ° intervals from the first recess 4 _21, the projections 8 by repeating this less 4 ₂ are arranged at equal intervals. The depth of the recess 4 ₂ may be the same as the depth of the groove 9, or may be deeper than the groove 9 (which may form a convex portion as the external force receiving portion on the inner side of the groove 9).

When forming the convex part 4 ₃ (FIG. 4) having a low height as the external force receiving part, the axial rigidity and the flexural flexibility of the corrugated tube can be set by variously setting the height of the convex part 4 _3. Can be changed as appropriate. It height of the convex portion 4 ₃ may be changed for each corrugated tube may be changed for each groove 9 in one of the corrugated tube. The height of the convex portion 4 ₃ can be appropriately set in a range from the same height as the ridges 8 to the same or lower the height and root diameter of the groove 9. It is also possible to change the various in one of the corrugated tube 3 ₈ the width of the convex portion 5 also in the embodiment of FIG. 10.

In addition, when using a corrugated tube having an oval cross section or a flat shape, each external force receiving portion (each convex portion 5 or each concave portion 4 ₂ ) may be arranged at an equal angle as described above, or You may arrange | position each external force receiving part by equal pitch with the outer peripheral length of the equal length of a corrugated tube instead of an angle. In the corrugated tube having a circular cross section, the angular intervals of the external force receiving portions can be set at different intervals instead of equal intervals.

According to the fourth embodiment, by reducing the axial expansion and contraction of the corrugated tube 3 ₈ to enhance the rigidity in the axial direction of the corrugated tube 3 ₈ by an external force receiving unit 5, like the aforesaid embodiment, the engagement It is possible to eliminate the variation in the fixing position of mounting parts such as stopper clips and holders, and to receive the tensile force or compressive force at the external force receiving portion 5 without directly applying the tensile force or compressive force to the electric wire inside the corrugated tube. to it of course it can be enhanced bending durability and life of the wire, because the uniformly arranged at equal intervals of an external force receiving portion 5 in the circumferential direction, flexible in any direction corrugated tube 3 ₈ is bent possible, also it can be easily performed with a small force in any direction of up, down, left and right bending operation of the corrugated tube 3 _8, wiring of the vehicle, such as a wire harness is inserted through the wire into the corrugated tube Work is enhanced.

Figure 12 is a fifth embodiment of the corrugated tube harness, in a circular cross section of the corrugated tube 3 _9, the convex portion 5 of the external force receiving portion (5 ₁ to 5 _n) of each of two mountains (two ridges 8 Each example shows an example of being formed extending in the axial direction.

The interval between the convex portions 5 is set to the same angle θ as in the fourth embodiment of FIGS. First convex portion 5 ₁ is formed extending between the left in Figure 12 of the first and third projections _81, 82 ₃ (first and second grooves 9 _1, 9 _2), first protrusions 5 ₁ and the third at θ ° intervals fifth projections 8 _3, 8 ₅ between (the third and fourth grooves 9 _3, 9 ₄₎ of the second protrusion 5 ₂ There are extendedly formed in the first convex portion 5 ₁ and a fifth at 2θ ° intervals seventh projections 8 _5, 8 ₇ between the (fifth and sixth groove 9 _5, 9 ₆₎ the third convex portion ₃ is formed to extend in the first 3θ ° intervals between the convex portions 5 ₁ seventh and ninth projections 8 _7, 8 ₉ between the (seventh and eighth groove 9 _7, 9 to ₈₎ the fourth protrusion 5 ₄ is extended form, and the first protrusion 5 ₁ second at 4θ ° intervals nine and eleventh projections 8 _9, 8 ₁₀ between ( In the ninth and tenth concave grooves 9 ₉ , 9 ₁₀ ), a fifth convex portion 5 ₅ is formed to extend, and this is repeated thereafter so that each convex portion 5 crosses each convex strip 8 (concave groove 9). Formed at regular intervals There.

  Note that the first to nth convex portions 5 may be arranged in a spiral order without changing the order so that the convex portions 5 can be uniformly distributed on the tube circumference. Moreover, the convex part 5 can be extendedly formed for every some protruding item | line not only every 2 mountains but every 3 mountains, every 4 mountains, etc. Moreover, the convex part 5 as an external force receiving part can be made into a convex part lower than the convex strip 8, or it can replace with the convex part 5 and can form a recessed part. Further, the circumferential interval between these external force receiving portions can be set at various angles such as 45 °, 60 °, and 90 °. Moreover, it is also possible to arrange these external force receiving portions at different angles instead of equal angles. It is also possible to form a similar external force receiving portion on a cross-sectional oval or flat corrugated tube instead of a circular cross-section.

  According to the fifth embodiment, since the external force receiving portion 5 is formed to extend straightly perpendicular to the plurality of ridges 8 (concave grooves 9), the rigidity in the tube axis direction is increased, and the expansion and contraction is suppressed. The fixing position of the mounting parts such as the stop clip and the holder can be defined with higher accuracy, and the bending force and the life of the electric wire inside the corrugated tube can be further improved by reliably receiving the tensile force and the compressive force. Of course, the corrugated tube can be flexibly bent in any direction.

13, equal angles a sixth embodiment of the corrugated tube harness, the corrugated tube 3 ₁₀ circular section, the axial direction of the projections 5 (5 ₁ to 5 _n) every Ilsan as the external force receiving portion It is characterized by having been arranged by. The interval between the convex portions 5 is the same as in FIG.

First convex portion 5 ₁ is positioned between the left first and second projections _81, 82 (first groove 9 ₁₎ in FIG. 13, the third and fourth projections 8 _3, the second convex portion 5 ₂ is positioned in the first degrees interval θ is a convex portion 5 ₁ 8 ₄ between the (third grooves 9 _3), the fifth and sixth projections 8 ₅ and 8 ₆ (fifth groove 9 ₅ ), the third protrusion 5 ₃ is located at an interval of 2θ ° from the first protrusion 5 _1, and the seventh and eighth protrusions 8 _7, the fourth convex portion ₄ is positioned at 3θ ° intervals from the first protrusion 5 ₁ 8 ₈ between (groove 9 ₇ 7), the ninth and tenth projections 8 _9, 8 fifth protrusion 5 ₁ between (ninth groove 9 _{9) 10} is positioned at 4θ ° intervals from the first protrusion 5 _1, and so the convex portions every Ilsan 5 is arranged.

  Note that the first to nth convex portions 5 may be arranged in a spiral order without changing the order so that the convex portions 5 can be uniformly distributed on the tube circumference. Further, the convex portion 5 is not limited to a single mountain, but a double mountain or the like, or is formed for each of a plurality of convex strips as in the embodiment of FIG. It is also possible to set up a mountain. If there is too much clearance between the convex portions 5, the rigidity in the tube axis direction will be weakened, so it is set as appropriate according to necessity.

  Moreover, the convex part 5 as an external force receiving part can be made into a convex part lower than the convex strip 8, or it can replace with the convex part 5 and can form a recessed part. Further, the circumferential interval of these external force receiving portions can be set at various angles such as 45 °, 60 ° and 90 °. Moreover, it is also possible to arrange these external force receiving portions at different angles instead of equal angles. It is also possible to form a similar external force receiving portion on a cross-sectional oval or flat corrugated tube instead of a circular cross-section.

According to the sixth embodiment, a certain degree of rigidity can be exhibited in the axial direction, and extremely flexible bendability can be exhibited in the bending direction. The axial rigidity prevents the expansion and contraction of the corrugated tube 3 ₁₀ , so that the fixing position of the mounting parts such as the locking clip and holder can be specified, and the bending and durability of the wires inside the corrugated tube The lifetime can be increased. The flexible flexibility, any direction can be flexibly bent corrugated tube 3 _10, it is possible to enhance the arrangement work of the wire harness.

The configuration shown in FIG. 10 or the configuration shown in FIG. 12 or 13 can be selected as appropriate according to the need for the rigidity in the axial direction of the corrugated tubes 3 _{8 to} 3 ₁₀ in the wire harness and the flexibility in the bending direction. It is. It is also possible to simultaneously form the forms of FIGS. 10 to 13 on a single corrugated tube.

The wiring harness may be formed using any one of the corrugated tube 3 _{8-3 10} shown in FIGS. 10 to 13 similarly to the embodiment of FIG. Locking clips and other mounting parts are mounted in the middle of the corrugated tubes 3 _{8 to} 3 ₁₀ , and each electric wire is safely protected from interference with the outside in the corrugated tube. Wire harness with the corrugated tube 3 _{8-3 10} shown in FIGS. 10 to 13 is not to wired so straight as in Figure 9, flexibly bent along the three-dimensionally curved panels of the vehicle body It is preferable to carry out the wiring while making them.

It is a perspective view showing a first embodiment of a corrugated tube for harness according to the present invention. Similarly, the corrugated tube for harness is shown, (a) is an AA cross-sectional view of (b), and (b) is a plan view. 2nd embodiment of the corrugated tube for harnesses is shown, (a) is BB sectional drawing of (b), (b) is a top view. 3rd embodiment of the corrugated tube for harnesses is shown, (a) is CC sectional drawing of (b), (b) is a top view. It is sectional drawing which shows one form of a corrugated tube of cross-sectional oval shape. It is sectional drawing which shows the other form of the corrugated tube of cross-sectional oval shape. It is sectional drawing which shows the other form of a corrugated tube of cross-sectional oval shape. It is sectional drawing which shows one form of a cross-sectional flat corrugated tube. It is a top view which shows one Embodiment of the wire harness using a corrugated tube. It is a top view which shows 4th embodiment of the corrugated tube for harnesses. It is sectional drawing which similarly shows the corrugated tube for harnesses. It is a top view which shows 5th embodiment of the corrugated tube for harnesses. It is a top view which shows 6th embodiment of the corrugated tube for harnesses. It is a top view which shows one form of the wire harness using the conventional corrugated tube. It is a perspective view which shows one form of the conventional corrugated tube. It is a perspective view which shows the other form of the conventional corrugated tube.

Explanation of symbols

3 ₁ to 3 ₁₀ corrugated tube harness _{4 1, 4 3, 5 (} 5 1 ~5 n) projection (force receiving portion)
4 ₂ recess (external force receiving part)
8 Convex strip 9 Concave groove 12 Wire harness 13 Locking clip (component)
15a electric wire

Claims (5)

In a freely corrugated harness corrugated tube having a plurality of hollow ridges and grooves in the circumferential direction in the axial direction, an external force receiving portion that suppresses expansion and contraction in the tube axial direction by the ridges and the grooves , A corrugated tube for a harness formed discontinuously in the tube longitudinal direction and arranged one by one in the circumferential direction at regular intervals on a spiral trajectory in the tube circumferential direction ,
The harness corrugated tube, wherein the external force receiving portion is formed in one or a plurality of protrusions or grooves .   The harness corrugated tube according to claim 1, wherein the external force receiving portion is formed for each of the one or a plurality of the ridges or grooves. The external force receiving unit, according to claim 1 or 2, wherein the corrugated tube for harness characterized in that it is a hollow convex portion connecting the ridge to each other. In a freely corrugated harness corrugated tube having a plurality of hollow ridges and grooves in the circumferential direction in the axial direction, an external force receiving portion that suppresses expansion and contraction in the tube axial direction by the ridges and the grooves, A corrugated tube for a harness formed discontinuously in the tube longitudinal direction and arranged one by one in the circumferential direction at regular intervals on a spiral trajectory in the tube circumferential direction,
The external force receiving portion, characterized and to Ruha harness corrugated tube for said a recess linearly across the respective ridge and the groove. A wire harness, comprising: an electric wire inserted into the harness corrugated tube according to any one of claims 1 to 4 ; and a component fixed to the outer peripheral side of the harness corrugated tube.

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