JP2010004639A - Hard tube for enclosing wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hard tube for enclosing a wire harness which does not require firm tape winding for preventing a slit from opening, and does not require preparing many types of hard tube, according to the diameter of the wire harness. <P>SOLUTION: In a hard tube 1 for enclosing a wire harness which is attached to the outer circumference of a wire harness WH, a slit is formed at one place in the circumferential direction of a tubular circumferential wall 2 over the total length thereof, the circumferential wall is curled so that the opposite ends 2a and 2b thereof, having the slit therebetween overlap in the circumferential direction with one inner surface touching the other outer surface, protrusions and recesses 4 and 5 having a triangular cross-section and engaging each other, when the opposite ends of the circumferential wall are made to be overlapped on the overlapping surface at the opposite ends of the overlapping circumferential wall are formed alternately in the circumferential direction of the circumferential wall and provided continuously with the same cross-section over the total length of the circumferential wall, and the protrusions and recesses 4 and 5 at the ends 2a and 2b of at least one circumferential wall are provided in the shape of sawtooth for plurality of pitches. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hard tube for wire harness exterior.

  A hard tube 101 as shown in FIG. 3 is known as an exterior material for a wire harness. This hard tube 101 forms a slit (not shown in the figure because the slit does not appear to be closed naturally) at one location in the circumferential direction of the cylindrical peripheral wall 102. Both ends 102a, 102b of the peripheral wall sandwiching the inner wall are configured to have a curved ridge on the peripheral wall so as to wrap in the circumferential direction with one inner surface and the other outer surface in contact with each other.

  In the case of this hard tube 101, since the applicable diameter φ with respect to the wire harness is substantially fixed, a plurality of types must be prepared according to the diameter of the wire harness. Moreover, since there exists a possibility that a slit may open carelessly with the natural state with which the outer periphery of the wire harness was mounted | worn, the countermeasures, such as tape-wrapping from the top, are required.

  Apart from this, a corrugated tube is known as an exterior material for a wire harness. 4 shows a cross-section of a corrugated tube described in Patent Document 1, for example, FIG. 4 (a) shows a state where the slit is opened, and FIG. 4 (b) shows a state where the slit is closed.

The corrugated tube 150 is provided with circumferential crests 151 and troughs 152 alternately in the axial direction, forming slits 153 over the entire length in the axial direction, and one side and the other side of the crests 151 sandwiching the slit 153 By forming a female lock part 155 and a male lock part 156 having a trapezoidal cross section to be engaged with each other, the female lock part 155 and the male lock part 156 are engaged with each other in a state where the corrugated tube 150 is mounted on the outer periphery of the wire harness. 153 is configured not to open.
JP-A-10-136531

  By the way, the conventional hard tube has to be prepared in various types according to the diameter of the wire harness, and it is necessary to wind the tape from the top so that the slit does not open unintentionally, and improvement is desired. It was. Moreover, although it is possible to apply the structure of the female lock part and the male lock part in the corrugated tube described in Patent Document 1 shown in FIG. 4 to the hard tube of FIG. Further improvements were necessary.

  In consideration of the above circumstances, the present invention does not need to be taped firmly so as not to open the slit, and it is not necessary to prepare various types according to the diameter of the wire harness. The purpose is to provide.

  The invention according to claim 1 is a hard tube for exterior of a wire harness that is attached to the outer periphery of the wire harness and extends over the entire length of the peripheral wall at one location in the circumferential direction of the cylindrical peripheral wall. A slit is formed, and curved edges are attached to the peripheral wall so that both ends of the peripheral wall sandwiching the slit wrap in the circumferential direction with one inner surface and the other outer surface in contact with each other. Convex and concave portions having a triangular cross section that engage with each other when both ends of the peripheral wall are wrapped on the overlapping surfaces of both ends of the peripheral wall are alternately formed in the circumferential direction of the peripheral wall, and over the entire length of the peripheral wall It is provided continuously in the same cross section, and at least one end portion of the peripheral wall is provided with a plurality of pitches in a sawtooth shape.

  The invention according to claim 2 is the hard tube for exterior of the wire harness according to claim 1, characterized in that the unevenness at both ends of the peripheral wall is provided in a sawtooth shape for a plurality of pitches. .

  Invention of Claim 3 is the hard tube for wire harness exterior of Claim 1 or 2, Comprising: The unevenness | corrugation of the both ends of the said surrounding wall is formed in the inner and outer both surfaces, It is characterized by the above-mentioned.

  Invention of Claim 4 is a hard tube for wire harness exterior of any one of Claims 1-3, Comprising: The said unevenness | corrugation is an isosceles triangle shape whose apex angle is the range of 20 degrees-120 degrees. It is formed in the cross section of this.

  According to the first aspect of the present invention, both ends of the peripheral wall can be fixed to each other while preventing the circumferential displacement of the wrapped portion by fitting the concave and convex portions at the both ends of the peripheral wall across the slit. Therefore, even if it is a case where tape winding from the top for fixation is unnecessary, or tape winding, simplification is attained and improvement of workability | attachment to a wire harness can be aimed at.

  Further, since the tube diameter can be freely changed by changing the meshing position of the unevenness, the number of types of sizes to be arranged according to the applicable wire harness diameter can be reduced, and resource saving can be achieved.

  Furthermore, since the cross-section of the unevenness is triangular, and the unevenness at the end of at least one peripheral wall is provided for multiple pitches, the engagement position of the unevenness can be arbitrarily shifted while lightly engaging the unevenness It can be fixed while adjusting the tightening amount by one pitch. Accordingly, appropriate tightening according to the diameter of the wire harness can be easily performed.

  Furthermore, since the unevenness is continuously provided in the same cross section over the entire length of the peripheral wall, it can be made only by extrusion molding. Therefore, it can be used simply by cutting to the required length after extrusion, and many products can be provided at low cost.

  According to the second aspect of the present invention, since the concave and convex portions at both ends of the peripheral wall are provided for a plurality of pitches, a large number of concave and convex portions can be meshed simultaneously, and the fixing force can be increased.

  According to the invention of claim 3, since the unevenness of both end portions of the peripheral wall is formed on both the inner and outer surfaces, the unevenness can be engaged regardless of which end portion is wrapped up, No distinction is necessary.

  According to invention of Claim 4, since the cross section of the unevenness was formed in the shape of an isosceles triangle having an apex angle in the range of 20 ° to 120 °, the engagement position of the unevenness in the circumferential direction in the lightly engaged state is shifted. The operation can be easily performed in either direction, and a necessary and sufficient meshing force can be exhibited.

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

  FIG. 1 shows the overall configuration of the hard tube of the embodiment, FIG. 1 (a) is a perspective view, FIG. 1 (b) is a front view, and FIG. 2 is a detailed view of the main part of the hard tube. ) Is a front view, and FIG. 2B is an enlarged view of the main part.

  As shown in FIG. 1, the hard tube 1 is for protecting the wire harness WH by being attached to the outer periphery of the wire harness WH, and has a peripheral wall at one place in the circumferential direction of the cylindrical peripheral wall 2. 2 is formed, and the two end portions 2a and 2b of the peripheral wall 2 sandwiching the slit are formed as shown in FIG. A curved wall is attached to the peripheral wall 2 so as to wrap in the circumferential direction (in the direction of arrow Y in FIG. 2A) with one inner surface and the other outer surface in contact with each other. Is provided with flexibility.

  In this hard tube 1, both end portions of the peripheral wall 2 are formed on the overlapping surfaces (the outer surface A of the end portion on the inner peripheral side and the inner surface B of the end portion 2 b on the outer peripheral side) of the both end portions 2 a and 2 b of the peripheral wall 2 to be wrapped. Concavities and convexities 4 and 5 having triangular cross sections that engage with each other when 2a and 2b are wrapped are alternately formed in the circumferential direction of the peripheral wall 2, and are continuously provided in the same cross section over the entire length of the peripheral wall 2. Yes.

  As shown in FIG. 2, in the unevenness 4 and 5 in this case, a plurality of pitches are provided in a sawtooth shape, and are formed on both the outer surface A and the inner surface B. Moreover, the cross section is formed in the cross section of an isosceles triangle shape whose apex angle (theta) is the range of 20 degrees-120 degrees (especially about 30 degrees is preferable). Therefore, when the both end portions 2a and 2b of the peripheral wall 2 are overlapped, the convex portion 4a on the outer surface of the end portion 2a on the inner peripheral side meshes with the concave portion 5b on the inner surface of the end portion 2b on the outer peripheral side, so that the inner peripheral side The concave portion 4b on the outer surface of the end portion 2a and the convex portion 5a on the inner surface of the end portion 2b on the outer peripheral side mesh with each other. In addition, the height h of the unevenness | corrugations 4 and 5, the pitch P of the unevenness | corrugations 4 and 5, and the wall thickness t of the surrounding wall 2 are set to the substantially close value.

  In order to attach this hard tube 1 to the outer periphery of the wire harness WH, a slit is opened and the wire harness WH is put into the hard tube 1. And the unevenness | corrugations 4 and 5 are meshed | engaged in a suitable position. As described above, the both ends 2a and 2b of the peripheral wall 2 are fixed to each other while preventing the deviation of the wrapped portion in the circumferential direction by fitting the concave and convex portions 4 and 5 of the both ends 2a and 2b of the peripheral wall 2 across the slit. can do. Accordingly, tape winding from the top for fixing is not required, or even when tape winding is performed, simplification is possible, and the workability of assembling to the wire harness WH can be improved.

  Moreover, since the tube diameter can be changed freely by changing the meshing position of the unevenness 4 and 5, the number of types of sizes to be arranged according to the diameter of the applicable wire harness WH can be reduced, and resource saving is achieved. Can be planned.

  Moreover, since the cross section of the unevennesses 4 and 5 is triangular, and the unevenness of the end portions 2a and 2b of at least one peripheral wall 2 is provided for a plurality of pitches, The meshing positions 4 and 5 can be arbitrarily shifted, and can be fixed while adjusting the tightening amount by one pitch. Therefore, appropriate tightening according to the diameter of the wire harness WH can be easily performed.

  Moreover, since the unevenness | corrugations 4 and 5 are continuously provided in the same cross section over the full length of the surrounding wall 2, it can be made only by extrusion molding. Therefore, it can be used simply by cutting to the required length after extrusion, and many products can be provided at low cost.

  Moreover, in the hard tube 1 of this embodiment, since both the unevenness | corrugations 4 and 5 of the both ends 2a and 2b of the surrounding wall 2 are provided for multiple pitches, many unevenness | corrugations 4 and 5 can be mesh | engaged simultaneously and fixed. You can improve your power.

  Moreover, in the hard tube 1 of this embodiment, since the unevenness | corrugation 4 and 5 of the both ends 2a and 2b of the surrounding wall 2 are formed in both inner and outer surfaces, even if it wraps any edge part 2a and 2b up, the unevenness | corrugation 4 5 can be meshed, and there is no need to distinguish between upper and lower when lapping.

  Moreover, in the hard tube 1 of this embodiment, since the cross section of the unevenness | corrugations 4 and 5 is formed in the isosceles triangle shape whose apex angle is the range of 20 degrees-120 degrees, the circumferential direction in the state which lightly meshed | engaged The shifting operation of the engagement positions of the projections 4 and 5 can be easily performed in either direction, and a necessary and sufficient engagement force can be exhibited.

  In addition, although the case where all the unevenness | corrugations 4 and 5 of the edge parts 2a and 2b of the surrounding wall 2 were provided by multiple pitch was shown in the said embodiment, you may provide multiple pitch only about one edge part.

  Moreover, although the case where the unevenness | corrugation 4 and 5 was provided in the inner and outer both surfaces of the lap | wrap part of the edge parts 2a and 2b of the surrounding wall 2 was shown from the relationship of the thickness of the surrounding wall 2 in the said embodiment, the edge part of the surrounding wall 2 was shown. It is sufficient if there are irregularities 4 and 5 only on the overlapping surface of 2a and 2b.

The whole structure of the hard tube of embodiment of this invention is shown, (a) is a perspective view, (b) is a front view. It is detail drawing of the principal part of the hard tube, (a) is a front view, (b) is an enlarged view of the principal part. It is a block diagram of the conventional hard tube, (a) is a perspective view, (b) is a front view. The cross section of the conventional corrugated tube is shown, (a) is a state where the slit is opened, (b) is a cross-sectional view showing the state where the slit is closed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hard tube 2 Peripheral wall 2a, 2b End part 4,5 Concavity and convexity P Concavity and convexity WH Wire harness

Claims (4)

In the hard tube for the exterior of the wire harness that is attached to the outer periphery of the wire harness and has flexibility in the circumferential direction,
A slit extending over the entire length of the peripheral wall is formed at one circumferential position of the cylindrical peripheral wall, and both end portions of the peripheral wall sandwiching the slit wrap in the peripheral direction with one inner surface and the other outer surface in contact with each other. As described above, the peripheral wall is provided with curved ridges, and the overlapping surfaces of both end portions of the peripheral wall to be wrapped have triangular cross-sectional irregularities that engage with each other when both end portions of the peripheral wall are wrapped. The circumferential wall is alternately formed and continuously provided in the same cross section over the entire length of the peripheral wall, and at least one end portion of the peripheral wall is provided with a plurality of pitches in a sawtooth shape. A hard tube for wire harness exterior. It is the hard tube for wire harness exterior according to claim 1,
A hard tube for exterior of a wire harness, wherein unevenness at both ends of the peripheral wall is provided in a sawtooth shape for a plurality of pitches. It is the hard tube for wire harness exterior according to claim 1 or 2,
The hard tube for the exterior of a wire harness, wherein unevenness at both ends of the peripheral wall is formed on both the inside and outside surfaces. It is a hard tube for wire harness exterior given in any 1 paragraph of Claims 1-3,
A hard tube for wire harness exterior, wherein the irregularities are formed in a cross section of an isosceles triangle having an apex angle in a range of 20 ° to 120 °.

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