JP2009195046A - Corrugate tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrugate tube for housing cables which prevents the housed cables from protruding, stabilizes positioning of the cables to be built in a vehicle body, and reduces thickness of a branch portion and other cables that are built in the vehicle body. <P>SOLUTION: The corrugate tube 1 housing cables includes planar portions 2a and 3a in the longitudinal direction and two cylinders 2 and 3 having semicircular sections in the short direction. Slits 2b and 3b for housing the cables are formed along the longitudinal direction on the planar portions 2a and 3a of the two cylinders 2 and 3, respectively. The two planar portions 2a and 3a are closely bonded to each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a corrugated tube that accommodates a plurality of electric wires, and more particularly to a corrugated tube that can obtain effects such as prevention of protrusion of electric wires and stability during mounting and fixing.

  In the manufacture of automobiles, a plurality of electric wires for supplying electric signals to electronic components are bundled into a bundle called a wire harness, and when installed in a vehicle body, as shown in the perspective view of FIG. Is housed and protected in a corrugated tube 50 formed into a bellows-like cylinder. The corrugated tube 50 is formed with slits 50a along the longitudinal direction thereof, and the wire harness is inserted by expanding the gaps of the slits 50a.

However, as shown in FIG. 9A, when the wire harness 60 is accommodated in the corrugated tube 50, the electric wire 60a included in the wire harness 60 may jump out of the slit 50a unless the gap of the slit 50a is sealed. There was a problem (first problem).
For this reason, conventionally, as shown in FIG. 9B, after the wire harness 60 is accommodated in the corrugated tube 50, the tape 65 is wound around the outer peripheral surface of the corrugated tube 50 while being overlapped by half the width. It was necessary to perform half-wrapping, which required a lot of work.

When the corrugated tube 50 is incorporated in the vehicle body, a clamp member 70 for the vehicle body is attached to the outer peripheral surface of the corrugated tube 50 with an adhesive tape 66 or the like as shown in FIG.
However, as shown in FIG. 10 (b), since the clamp member 70 is attached to the outer peripheral surface of the corrugated tube 50, that is, the curved surface, the positioning of the assembly into the vehicle body becomes unstable, and the wire is based on the clamp position. There was a problem (second problem) that the branching direction accuracy of the branch line was lowered.

For the first and second problems as described above, in Patent Document 1, as shown in the cross-sectional view of the corrugated tube 75 in FIG. 11, a flat wall portion 75a along the longitudinal direction on the outer periphery of the tube. A configuration in which is formed is disclosed. The wall portion 75a is formed with a slit portion 75b for inserting an electric wire along the longitudinal direction.
According to this configuration, the wall portion 75a is brought into contact with the vehicle body surface 80, so that the wire harness 81 is prevented from jumping out from the slit portion 75b, and the stability of the fixation to the vehicle body surface 80 is improved. It is supposed to improve.
JP 2000-115944 A

  By the way, in the corrugated tube 75 disclosed in Patent Document 1, the cross-sectional shape thereof is larger than a semicircle and is formed in an arc shape close to a substantially perfect circle so as not to reduce the accommodation capacity of the wire harness. For this reason, the lateral width of the wall portion 75 a is formed to be significantly shorter than the diameter of the corrugated tube 75.

  However, in such a shape of the corrugated tube 75, when the clamp member 82 is attached to the vehicle body surface 80 as shown in FIG. 12, the base portion for fixing the clamp member 82 to the corrugated tube 75. A gap S corresponding to the thickness of 82a is generated between the wall 75a and the vehicle body surface 80, and the wires of the wire harness may jump out from the slit 75b.

  Further, in the corrugated tube 75 disclosed in Patent Literature 1, since the lateral width of the wall portion 75 a is short, the mounting stability to the vehicle body surface 80 is not sufficient, and the wall portion 75 a is not attached to the vehicle body surface 80. There was a high risk of floating.

  Further, in the conventional cylindrical corrugated tube, as shown in FIG. 14, when branching from a large-diameter tube 85 (main line) into two small-diameter tubes 86 and 87 (branch lines), There is a problem (third problem) that it is necessary to fix the base of the branch line by multiple winding of the adhesive tape, the branch part is bulky, and the work is troublesome.

Further, when another cable is incorporated into the conventional corrugated tube, an assembling clamp member 92 is attached to the corrugated tube 90 as shown in FIG. 15, and the cable 91 or the like is fitted into the clamp member 92 and fixed. There is a problem (fourth problem) that the member 92 is bulky and requires labor for assembling work such as attachment.
Patent Document 1 does not disclose any means for solving the third and fourth problems.

  The present invention has been made under the circumstances as described above, and in the corrugated tube that accommodates the electric wire, while preventing the accommodated electric wire from protruding, it stabilizes the positioning of the built-in to the vehicle body, and further branches. An object of the present invention is to provide a corrugated tube capable of slimming the part and other cables.

In order to solve the above-described problems, a corrugated tube according to the present invention is a corrugated tube that accommodates an electric wire, and includes two cylindrical bodies having a planar portion in the longitudinal direction and a semicircular cross section in the short direction. The slits for accommodating the electric wires are formed along the longitudinal direction in the planar portions of the two cylindrical bodies, and the two planar portions are in close contact with each other.
In addition, it is desirable that the two cylindrical bodies are bound together by winding an adhesive tape around an outer peripheral surface thereof, and the two planar portions are in close contact with each other.

By comprising in this way, the slit formed in the planar part of a cylindrical body is sealed, and the protrusion of the electric wire from a slit can be prevented.
In addition, since the slits 2b and 3b are not exposed by bringing the planar parts of the cylindrical body into close contact with each other, it is not necessary to wrap the adhesive tape in half wraps, and the adhesive tape should not be misaligned. Wrap around. Therefore, the work can be greatly reduced as compared with the prior art.
Moreover, when branching a corrugated tube from a trunk line to a branch line, two cylindrical bodies can be easily branched by not binding with an adhesive tape, the branch part is not bulky, and it can be made slimmer than before.

The two cylindrical bodies are separable, and the separated cylindrical bodies are installed in a state where at least the edge of the planar portion abuts the installation target surface.
Thereby, a cylindrical body can be stably installed with respect to an installation object surface, and the branch direction accuracy from a trunk line to a branch line can be improved.
Further, even if the electric wire protrudes from the slit, it can be prevented from jumping outward from the edge of the planar portion.

Moreover, it is desirable that the peripheral surface of the cylindrical body is formed in a bellows shape.
By forming such a bellows shape, bendability (directivity) and rigidity can be improved.
Moreover, it is desirable that a predetermined groove is provided along the longitudinal direction of the outer peripheral surface of the cylindrical body.
By constructing in this way, when other cables are installed in the corrugated tube, the installation work can be facilitated by fitting the cable into the groove, eliminating the need for clamping members and reducing costs. can do.

  According to the present invention, in the corrugated tube that accommodates the electric wire, it is possible to prevent the accommodated electric wire from protruding, stabilize the positioning of the incorporation into the vehicle body, and further reduce the incorporation of the branch portion and other cables. A corrugated tube that can be obtained can be obtained.

Hereinafter, embodiments of a corrugated tube according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view schematically showing the periphery of the tip of a corrugated tube 1 according to the present invention. The corrugated tube 1 is a member used to accommodate and protect the wire harnesses 10 and 11 in which a plurality of electric wires are bundled.

The corrugated tube 1 includes two corrugated tubes (hereinafter referred to as half tubes for convenience) 2 (hereinafter, referred to as “half tubes” for convenience) as shown in FIG. 3). That is, planar flat portions 2a and 3a (planar portions) are formed on the outer peripheral surfaces of the half tubes 2 and 3, and these flat portions 2a and 3a are aligned with each other as shown in FIG. It is constituted by being in close contact.
As shown in FIG. 1, the two half tubes 2 and 3 are bundled and integrated by winding the adhesive tape 4 around the outer periphery of the tube at predetermined intervals.

Further, slits 2b and 3b are formed in the flat portions 2a and 3a along the longitudinal direction, and a wire harness can be inserted by expanding the gap between the slits 2b and 3b.
Further, the peripheral surfaces of the half tubes 2 and 3 are formed in a bellows shape so that bendability (directivity) and rigidity are improved.

In order to accommodate the wire harnesses 10 and 11 in the corrugated tube 1, before binding the half tubes 2 and 3, first, the gaps of the slits 2 b and 3 b are widened with respect to the half tubes 2 and 3, respectively. The harnesses 10 and 11 are inserted.
Then, the flat portions 2a and 3a of the half tubes 2 and 3 are bound with the adhesive tape 4 in a state where the flat portions 2a and 3a are in close contact with each other.

In addition, since the slits 2b and 3b are formed in the flat portions 2a and 3a in the half tubes 2 and 3, the flat portions 2a and 3a are brought into close contact with each other, so that the slits 2b and 3b are sealed. The wires of the harnesses 10 and 11 do not jump out of the slits 2b and 3b.
Further, since the slits 2b and 3b are not exposed, the bundling of the half tubes 2 and 3 does not require the adhesive tape 4 to be half-wrapped, and the adhesive tape 4 is not displaced from the flat portions 2a and 3a. Can be wrapped around. Therefore, the work can be greatly reduced as compared with the prior art.

  Further, when the corrugated tube 1 is branched from the main line to the branch line, the corrugated tube 1 is composed of the two half tubes 2 and 3, so that the half tube 2 can be easily formed by not binding with the adhesive tape 4 as shown in FIG. 3 can be branched. Here, since the half tubes 2 and 3 serving as the branch lines are the same tube at the branch from the trunk line to the branch line, it is not necessary to fix the branch base portion by multiple winding of the adhesive tape. Therefore, the branch portion is not bulky as in the prior art, and can be slimmed.

Moreover, when installing the corrugated tube 1 in a vehicle body or the like (installation target surface) using a clamp member, it is preferable to install the corrugated tube 1 separately in half tubes 2 and 3 units.
In that case, as shown to Fig.5 (a), the clamp member 5 is attached to the flat parts 2a and 3a of the half tube 2 (3). The clamp member 5 includes a protruding fitting portion 5a and a plate-like base portion 5b for stably fixing the fitting portion 5a. As shown in the drawing, the base member 5b and the half tube 2 (3 ) With the adhesive tape 4 to be fixed to the half tube 2 (3).

  The fitting portion 5a of the clamp member 5 attached to the half tube 2 (3) is fitted into the through hole 80a of the vehicle body surface 80 as shown in FIG. 5 (b). Thereby, at least the edge 2c (3c) of the flat portions 2a and 3a abuts on the vehicle body surface 80, and the half tube 2 (3) is fixed to the vehicle body surface 80 in a stable state.

That is, since the cross-sectional shape of the half tube 2 (3) is semicircular, the width of the flat portion 2a (3a) is significantly wider than the width of the base portion 5b of the clamp member 5. Further, since the flat portion 2a (3a) is wide, the slit 2b (3b) portion is easily bent.
Therefore, as shown in the figure, when the half tube 2 (3) is fixed to the vehicle body 80, the clamp member 5 is sunk into the flat portion 2a (3a), and the edge portion 2c (3c) of the flat portion 2a (3a). ) Abuts on the body surface 80 and is fixed in a stable state.

Thereby, even if the electric wire of the accommodated wire harness 10 (11) protrudes from the slit 2b (3b), it does not protrude outward from the edge 2c (3c) of the flat portion 2a (3a). .
Further, the edge portion 2c (3c) of the flat portion 2a (3a) is in contact with the body surface 80, so that it can be fixed in a highly stable position for incorporation into the vehicle body, and the branch direction from the main line to the branch line Accuracy is improved.

Moreover, when incorporating another cable into the corrugated tube 1, as shown in the perspective view of FIG. 6 and the cross-sectional view of FIG. 7, for example, it is incorporated at (a plurality of) locations along the longitudinal direction of the outer peripheral surface of the half tube 2. It is desirable to form a predetermined groove 2d for fitting the cable 30 in accordance with the diameter of the cable 30.
In this way, the assembling work of the cable 30 can be facilitated, the clamping member for assembling becomes unnecessary, and the cost can be reduced.

As described above, according to the embodiment of the present invention, in the corrugated tube 1, the flat portions 2 a and 3 a of the two half tubes 2 and 3 having a short-side cross section formed in a semicircular shape are brought into close contact with each other. Bonded in state. Here, since the slits 2b and 3b for inserting the wire harness are formed in the flat portions 2a and 3a, the slits 2b and 3b are sealed, and the electric wires can be prevented from protruding from the slits 2b and 3b. .
In addition, when the corrugated tube 1 is branched from the main line to the branch line, the half tubes 2 and 3 can be easily branched by not binding with the adhesive tape 4, the branching portion is not bulky, and can be made slimmer than before. .

Further, when the corrugated tube 1 is installed on the installation target surface using a clamp member, the half tubes 2 and 3 are separated and installed so that at least the edges of the flat portions 2a and 3a abut against the installation target surface. Can be installed stably.
Thereby, the branching direction accuracy from the main line to the branch line can be improved, and even if the electric wire protrudes from the slits 2b and 3b, it jumps outward from the edges 2c and 3c of the flat portions 2a and 3a. You can avoid it.

  Furthermore, when incorporating another cable into the corrugated tube 1, by forming a predetermined groove 2d for fitting the cable at (a plurality of) locations along the longitudinal direction of the outer peripheral surface of the half tube 2, The assembling work of the cable 30 can be facilitated, a clamping member for assembling is unnecessary, and the cost can be reduced.

  The present invention relates to a corrugated tube that accommodates a plurality of electric wires, and can be suitably used, for example, in the manufacturing industry of automobile parts.

FIG. 1 is a perspective view schematically showing the periphery of the tip of a corrugated tube according to the present invention. FIG. 2 is a cross-sectional view of a half tube constituting the corrugated tube of FIG. FIG. 3 is a perspective view showing a state in which the flat portions of two half tubes are opposed to each other. FIG. 4 is a view showing a state where the corrugated tube of FIG. 1 is branched. FIG. 5 is a diagram for explaining the attachment of the half tube to the installation target surface. FIG. 6 is a perspective view showing an example in which another cable is incorporated into the corrugated tube of FIG. 1. FIG. 7 is a perspective view showing an example in which another cable is incorporated into the corrugated tube of FIG. 1. FIG. 8 is a perspective view of a conventional cylindrical corrugated tube. FIG. 9 is a diagram for explaining a problem of a conventional cylindrical corrugated tube. FIG. 10 is another view for explaining the problem of the conventional cylindrical corrugated tube. FIG. 11 is a cross-sectional view of the corrugated tube described in Patent Document 1. FIG. 12 is a diagram for explaining the problem of the corrugated tube described in Patent Document 1. FIG. FIG. 13 is another view for explaining the problem of the corrugated tube described in Patent Document 1. In FIG. FIG. 14 is another view for explaining the problem of the conventional cylindrical corrugated tube. FIG. 15 is another view for explaining a problem of a conventional cylindrical corrugated tube.

Explanation of symbols

1 Corrugated tube 2 Half tube (tubular body)
2a Flat part (planar part)
2b Slit 3 Half tube (tubular body)
3a Flat part (planar part)
3b Slit 4 Adhesive tape

Claims (5)

In the corrugated tube that houses the wire,
Two cylindrical bodies having a planar portion in the longitudinal direction and having a semicircular cross section in the lateral direction,
A corrugated tube, wherein a slit for accommodating the electric wire is formed along a longitudinal direction in the planar portions of the two cylindrical bodies, and the two planar portions are in close contact with each other.   The corrugated tube according to claim 1, wherein the two cylindrical bodies are bound together by winding an adhesive tape around an outer peripheral surface thereof, and the two planar portions are in close contact with each other.   The two cylindrical bodies are separable, and the separated cylindrical bodies are installed in a state where at least the edge of the planar portion abuts against the installation target surface. Alternatively, the corrugated tube according to claim 2.   The corrugated tube according to any one of claims 1 to 3, wherein a peripheral surface of the cylindrical body is formed in a bellows shape.   The corrugated tube according to any one of claims 1 to 4, wherein a predetermined groove portion is provided along a longitudinal direction of the outer peripheral surface of the cylindrical body.

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