JP2002013680A - Corrugated tube connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation of a tubular portion of a corrugated tube even when a tensile force along a longitudinal direction of the corrugated tube acts on a connected corrugated tube and a connecting member, and to provide a corrugated tube and a connected member. Prevents disconnection of members. SOLUTION: A first deformation preventing rib 32 fitted to a large diameter portion 21 of a corrugated tube 20 from the radial inside, and a second deformation fitted to a slit 24 of the corrugated tube 20 from the radial inside. The guide 30 provided with the prevention rib 33 is disposed between the outer surface of the wire harness W along the inner peripheral surface of the cylindrical portion 23 near the slit 24 of the corrugated tube 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a corrugated tube connecting structure in which a connecting member is connected to a corrugated tube, and more particularly to a structure for preventing a connecting member connected to a corrugated tube from being disconnected due to a tensile force or the like. .

[0002]

2. Description of the Related Art As shown in FIGS. 8 to 12, a conventional corrugated tube connecting structure comprises a connecting rib 51 protruding from an inner peripheral surface of an end of a protector 50 at an end small diameter portion 42 of a corrugated tube 40. Are fitted from the outside in the radial direction, so that the corrugated tube 40 is connected to the protector 50.

A corrugated tube 40 has a cylindrical portion 43 in which large-diameter portions 41 and small-diameter portions 42 are provided alternately along the longitudinal direction.
And a slit formed along the longitudinal direction of the cylindrical portion 43
Has 44.

[0004] The protector 50 is formed in a substantially cylindrical shape, and the diameter of both end portions 52 at which the connection ribs 51 protrude from the inner peripheral surface is larger than the diameter of the central portion 53 by a predetermined amount. Protector 50 is
Openable and closable about hinge 54, and lock mechanism 55
Can be held closed. Protector 50 is
In a state opened around the hinge portion 54, the wire harness W is housed inside, and both ends 52 overlap the ends of the corrugated tubes 40, and in this state, the hinge portion 54 is closed around the center, The closed state is maintained by the lock mechanism 55. This enables the protector 50
The connection ribs 51 are fitted to the small-diameter portions 42 of the corrugated tube 40 from the outside in the radial direction, and both ends 52 are connected to the ends of the corrugated tubes 40, respectively.

[0005]

In the above-described conventional corrugated tube connection structure, when a tensile force is applied to the connected corrugated tube 40 and protector 50 in the longitudinal direction of the corrugated tube 40, for example, the corrugated tube 40 is connected. When a pulling force acts on the left side in FIG. 10, as shown by a broken line in FIGS. 9 and 10, the cylindrical portion 43 of the corrugated tube 40 in which the connecting rib 51 of the protector 50 is fitted. There is a problem that deformation, particularly collapse of the large diameter portion 41 near the slit 44, occurs. slit
If the large diameter portion 41 collapses near 44, the protector
There has been a problem that the connection rib 51 of 50 and the small diameter portion 42 of the tubular portion 43 of the corrugated tube 40 are disengaged, and the corrugated tube 40 comes off from the protector 50.

According to the present invention, even when, for example, a tensile force is applied to the connected corrugated tube and the connecting member in the longitudinal direction of the corrugated tube, deformation of the tubular portion of the corrugated tube can be prevented, whereby the corrugated tube and the connecting member can be prevented. An object of the present invention is to provide a corrugated tube connection structure that can prevent disconnection of a connection member.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cylindrical portion in which a large diameter portion and a small diameter portion are alternately provided along a longitudinal direction, and a slit formed along the longitudinal direction of the cylindrical portion. By connecting the connecting rib provided on the inner surface with the connecting rib provided on the inner surface to the small diameter portion of the corrugated tube from the outside in the radial direction, the connecting member connected to the corrugated tube and the large diameter portion of the corrugated tube A first deformation preventing rib fitted from the radial inside and a second deformation preventing rib fitted from the radial inside into the slit of the corrugated tube are provided along the inner surface of the tubular portion of the corrugated tube. This is achieved by a corrugated tube connection structure including a guide to be disposed.

In the corrugated tube connecting structure according to the present invention, the connecting rib provided on the inner surface of the connecting member is fitted to the small diameter portion of the corrugated tube from the outside in the radial direction. Thereby, the connection member is connected to the corrugated tube.

When, for example, a tensile force is applied to the connected corrugated tube and the connecting member in the longitudinal direction of the corrugated tube, the first and second deformation preventing ribs of the guide are respectively connected to the connecting rib of the connecting member. This prevents deformation of the tubular portion of the fitted corrugated tube, and in particular, collapse of the large diameter portion near the slit. That is, the guide is arranged along the inner surface of the tubular portion of the corrugated tube, and the first deformation preventing rib of the guide is fitted to the large-diameter portion of the corrugated tube from the radial inside,
Further, since the second deformation preventing rib of the guide is fitted into the slit of the corrugated tube from the radial inside, the large-diameter portion and the small-diameter portion of the corrugated tube respectively have, for example, a tensile force along the longitudinal direction of the corrugated tube. It does not deform even if it acts. Thereby, disconnection of the corrugated tube and the connecting member is prevented.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 to 3, in the corrugated tube connecting structure, connecting ribs 11 protruding from the inner peripheral surface of the end of the protector 10 are attached to the end small diameter portion 22 of each corrugated tube 20 from the outside in the radial direction. Mated. Thereby, the end of the protector 10 is connected to the end of the corrugated tube 20.

The corrugated tube 20 has a large number of large diameter portions 21.
And a flexible tubular portion 23 in which small-diameter portions 22 are alternately provided along the longitudinal direction, and a slit 24 formed along the longitudinal direction of the tubular portion 23. The corrugated tube 20 accommodates the wire harness W in the tubular portion 23 from the slit 24 and covers the outer surface of the wire harness W with the tubular portion 23 elastically deformed on the side where the slit 24 is enlarged.

As shown in FIGS. 1 to 7, a guide 30 is provided between the inner peripheral surface of the cylindrical portion 23 near the slit 24 of the corrugated tube 20 and the outer peripheral surface of the wire harness W.
Is interposed. The guide 30 is formed of a synthetic resin having a required hardness or the like by integral molding in a substantially arc shape in cross section, and the convex arc surface 31 is formed by a cylindrical portion 23 of the corrugated tube 20.
It is arranged along the inner peripheral surface. When the wire harness W is housed in the tubular portion 23 from the slit 24 of the corrugated tube 20, the guide 30 is housed in the tubular portion 23 of the corrugated tube 20 together with the wire harness W.

The convex arc surface 31 of the guide 30 has a convex arc surface.
A first deformation preventing rib 32 (a pair of left and right in FIG. 5 in the present embodiment) along the bending direction of the 31 (vertical direction in FIG. 5), and a second deformation substantially orthogonal to the first deformation preventing rib 32 Prevention ribs 33 are protruded respectively. Each first deformation preventing rib 32
In the state where the guide 30 is disposed so that the convex arc surface 31 is arranged along the inner peripheral surface of the cylindrical portion 23 of the corrugated tube 20, the guide 30 is fitted from the radially inner side to the adjacent large diameter portion 21 of the corrugated tube 20. Are combined. The second deformation preventing rib 33
The guide 30 is fitted radially from the inside in the slit 24 of the corrugated tube 20 in a state where the guide 30 is arranged so that the convex circular surface 31 is arranged along the inner peripheral surface of the tubular portion 23 of the corrugated tube 20.

The operation of this embodiment will be described. Protector
10 houses the wire harness W inside,
The connection rib 11 on the inner peripheral surface of the end portion overlapping with the end of the corrugate tube 20 is fitted to the end small-diameter portion 22 of the corrugate tube 20 from the outside in the radial direction. This allows
The protector 10 is connected to the corrugated tube 20.

When, for example, a tensile force is applied to the connected corrugated tube 20 and the protector 10 along the longitudinal direction of the corrugated tube 20, that is, for example, when a tensile force is applied to the corrugated tube 20 to the right in FIG. First and second deformation preventing ribs 32, 33 of guide 30
The deformation of the cylindrical portion 23 of the corrugated tube 20 fitted with the connection rib 11 of the protector 10,
Crushing of the large diameter portion 21 in the vicinity of 24 is reliably prevented.

That is, the guide 30 is made of a corrugated tube.
The first deformation preventing rib 32 of the guide 30 is disposed along the inner surface of the cylindrical portion 23 near the slit 24 of the guide 20.
Is fitted to the large diameter portion 21 of the corrugated tube 20 from the radial inside, and further, the second deformation preventing rib 33 of the guide 30 is provided.
Are fitted into the slit 24 of the corrugated tube 20 from the radial inside, so that the large diameter portion 21 and the small diameter portion 22 of the corrugated tube 20 are respectively corrugated tubes.
Even if a tensile force along the longitudinal direction of 20 acts, it does not deform.
Thereby, the corrugated tube 20 and the protector 10
Is reliably prevented from being disconnected.

According to the embodiment described above, the first deformation preventing rib 32 fitted into the large-diameter portion 21 of the corrugated tube 20 from the radial inside, and the corrugated tube 20
The guide 30 provided with the second deformation preventing rib 33 fitted into the slit 24 of the corrugated tube 20 from the radially inner side extends along the inner peripheral surface of the cylindrical portion 23 in the vicinity of the slit 24 of the corrugated tube 20, and the wire harness W And the outer surface of the Therefore, even if, for example, a tensile force is applied to the connected corrugated tube 20 and the protector 10 along the longitudinal direction of the corrugated tube 20, the corrugated tube 20
The deformation of the cylindrical portion 23 can be reliably prevented. Thereby, disconnection of the corrugated tube 20 and the protector 10 can be reliably prevented. Further, as the corrugated tube 20 and the protector 10, the conventional structure can be applied, and in applying the corrugated tube connection structure of the present embodiment, the corrugated tube is used.
No processing or the like is necessary for the protector 20 and the protector 10. Therefore, excellent versatility can be secured, and high effects can be expected at low cost.

In the above-described embodiment, the guide 30 is formed in a substantially arc shape in cross section, and the first and second deformation preventing ribs 32, 33 project from the convex arc surface 31 respectively. However, the present invention is not limited to such a configuration. That is, for example, the guide is formed in a substantially cylindrical shape in cross-section, and the first deformation preventing rib 32 extends over substantially the entire circumference along the circumferential direction of the outer peripheral surface of the guide.
And a slit on the outer peripheral surface of the guide.
A configuration in which the second deformation preventing rib 33 is protruded from a portion near 24 is also possible.

[0019]

As described above, according to the present invention, the first fitting which is fitted to the large diameter portion of the corrugated tube from the inside in the radial direction.
A guide provided with a second rib for preventing deformation and a second rib for preventing deformation fitted to the slit of the corrugated tube from the radial inside is arranged along the inner surface of the tubular portion of the corrugated tube. Therefore, even when, for example, a tensile force is applied to the connected corrugated tube and the connecting member in the longitudinal direction of the corrugated tube, deformation of the tubular portion of the corrugated tube can be prevented. Thereby, disconnection of the corrugated tube and the connection member can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an embodiment according to the present invention.

2 is a cross-sectional view of the corrugated tube connection structure shown in FIG.

FIG. 3 is a perspective view showing a process of assembling a corrugated tube and a guide to a wire harness having the corrugated tube connection structure of FIG. 1;

FIG. 4 is a perspective view showing a guide of the corrugated tube connection structure of FIG. 1;

FIG. 5 is a plan view of the guide of FIG. 4;

FIG. 6 is a side view as viewed in the direction of arrow B in FIG. 5;

FIG. 7 is a side view as viewed in the direction of arrow C in FIG. 5;

FIG. 8 is a perspective view showing a conventional corrugated tube connection structure.

FIG. 9 is a perspective view of a main part of the corrugated tube connection structure of FIG. 8;

FIG. 10 is a sectional view of a main part of the corrugated tube connection structure of FIG. 8;

FIG. 11 is a view showing a deployed state of the protector having the corrugated tube connection structure of FIG. 8;

FIG. 12 is a side view of the protector of FIG.

[Explanation of symbols]

 10 Connecting member (protector) 11 Connecting rib 20 Corrugated tube 21 Large diameter part 22 Small diameter part 23 Cylindrical part 24 Slit 30 Guide 31 Convex arc surface 32 First deformation preventing rib 33 Second deformation preventing rib W Wire Harness

Claims (1)

[Claims] 1. A corrugated tube having a cylindrical portion provided with a large diameter portion and a small diameter portion alternately along a longitudinal direction and a slit formed along the longitudinal direction of the cylindrical portion,
By connecting the connecting rib provided on the inner surface to the small-diameter portion of the corrugated tube from the radial outside, the connecting member connected to the corrugated tube is fitted to the large-diameter portion of the corrugated tube from the radial inside. A first deformation preventing rib and a second deformation preventing rib fitted to the slit of the corrugated tube from the radial inside, and a guide arranged along the inner surface of the tubular portion of the corrugated tube. A corrugated tube connection structure comprising: