JP4430064B2 - Belt clamp mounting structure to corrugated tube and belt clamp mounting method - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt clamp mounting structure and a belt clamp mounting method to a corrugated tube, and more particularly to a belt clamp mounting structure and belt to a corrugated tube mounted on the outer periphery of a wire harness routed in a vehicle such as an automobile. The present invention relates to a clamp mounting method.

  Generally, a corrugated tube is attached to a wire harness that is routed in a vehicle such as an automobile at a location that may be damaged by contact with other members. A belt clamp is used as means for fixing the wire harness to a desired position such as a vehicle body panel.

  FIG. 5A is a plan view showing a conventional corrugated tube, and FIG. 5B is a plan view showing a normal belt clamp.

  As shown in FIG. 5A, the conventional corrugated tube 50 has a bellows shape in which an annular concave portion 50a and a convex portion 50b are continuously formed in the longitudinal direction, and a cracked portion is formed along the longitudinal direction. 50c is formed, the crack part 50c is expanded and it fits on the outer periphery of the required position of the wire harness W, and is mounted | worn.

  As shown in FIG. 5B, the normal belt clamp 60 is provided with a band portion 60a formed in a band shape and a base end of the band portion 60a, and the distal end of the band portion 60a is inserted and fixed. A band lock portion 60b in which an insertion hole 60d is formed, and a locking portion 60c that protrudes from the band lock portion 60b and is locked to the periphery of a locking hole (not shown) such as a body panel of an automobile. And is integrally formed of synthetic resin or the like.

  6A and 6B are explanatory views for explaining a conventional method of attaching the belt clamp to the corrugated tube 50. FIGS. 6A and 6D are front sectional views, and FIGS. 6B and 6C are side views.

  First, the crack part 50c of the corrugated tube 50 is opened, and the corrugated tube 50 is attached to the wire harness W (see FIG. 6A).

  Next, the vinyl tape 61 is wound around the area around the attachment position of the belt clamp 60 (see FIG. 6B). This is because when the crack 50c of the corrugated tube 50 is opened or the ends are overlapped with each other, or when the band portion 60a of the belt clamp 60 is tightened, the belt clamp 60 moves away from the convex portion 50b of the corrugated tube 50. This is to prevent slipping down into the recess 50a and lateral displacement.

  Next, the band portion 60a of the belt clamp 60 is wound around the vinyl tape 61 of the corrugated tube 50 (see FIG. 6C).

  Next, the outer periphery of the corrugated tube 50 is tightened by inserting and fixing the tip of the band portion 60a into the insertion hole 60d of the band lock portion 60b (see FIG. 6D).

  Thereafter, if necessary, the excess band portion 60a is cut (hereinafter, this technique is referred to as Conventional Example 1).

  Further, in Patent Document 1, a clamp extraction hole is provided at a predetermined position of the half-corrugated tube that is externally mounted on the wire harness, and the vehicle body engagement portion of the vehicle body engagement clamp that is attached in advance to the wire harness is removed from the clamp. There has been proposed a corrugated tube mounting structure to a wire harness that protrudes from a hole and holds the half corrugated tube at the vehicle body locking portion and attaches the half corrugated tube to the wire harness. According to this structure, the half-corrugated tube can be attached to the wire harness without being twisted (hereinafter, this technique is referred to as Conventional Example 2).

Patent Document 2 discloses a band portion wound around the outer periphery of a corrugated tube that is sheathed on a wire harness, and a band lock portion that is provided at the rear end of the band portion and that inserts and fixes a band tip wound around the corrugated tube. And a clip that protrudes from the band lock portion and engages with a vehicle body panel or the like of the automobile. A corrugated tube band clip has been proposed in which an annular convex portion of a corrugated tube is inserted and protruded, and a fitting portion is fitted into an annular concave portion of the corrugated tube so that the band portion is positioned and held on the corrugated tube. According to this corrugated tube band clip, it is possible to reliably prevent the winding position from being laterally shifted in a state in which the band portion is wound around the outer periphery of the corrugated tube and positioned (hereinafter, this technique is referred to as the technique). Conventional example 3).
JP-A-11-168815 Japanese Patent Laid-Open No. 08-308070

  In Conventional Example 1, since the vinyl tape 61 is used to prevent the opening / end portions of the corrugated tube 50 from overlapping and overlapping each other and the lateral displacement of the belt clamp 60, the number of mounting work steps increases. As the work takes time and the number of parts increases, there is a problem that the cost increases.

  Further, since the surface portion of the corrugated tube 50 is fastened by the band portion 60a of the belt clamp 60, the corrugated tube 50 is deformed or crushed. As a result, there has been a problem that the quality and appearance of the product are impaired, and the tolerance of the product varies.

  Furthermore, in order to fix the corrugated tube 50 to the wire harness W, it is necessary to use the corrugated tube 50 having an inner diameter corresponding to the outer diameter of the wire harness W. There was a problem that it was difficult to do.

  In the conventional example 2, the clamp is fixed to the wire harness with the tape, which increases the number of mounting steps, increases the work time, and increases the number of parts, leading to an increase in cost.

  In Conventional Example 3, since the surface portion of the corrugated tube is fastened by the band portion of the belt clamp, the corrugated tube is deformed or crushed. As a result, there has been a problem that the quality and appearance of the product are impaired, and the tolerance of the product varies.

  The present invention has been made in order to solve the above-described problems. To a corrugated tube that can improve the efficiency of mounting work, reduce costs, improve the quality and appearance of products, and suppress variations in product intersections. It is an object of the present invention to provide a belt clamp mounting structure and a belt clamp mounting method.

The belt clamp mounting structure to the corrugated tube of the present invention is attached to the outer periphery of the wire harness, and a corrugated tube having a crack formed in the longitudinal direction;
A band portion formed to extend in a band shape, a band lock portion provided at the base end of the band portion, and a lock that protrudes from the band lock portion and is locked in a lock hole of another member. A belt clamp having a portion;
Have
The corrugated tube is formed with a pair of first slit portions and second slit portions extending in the longitudinal direction across the crack portion and formed in the vicinity of the crack portion ,
The band portion of the belt clamp is inserted into the first slit portion, holds the wire harness in the corrugated tube, exits from the second slit portion, and is inserted into the insertion hole of the band lock portion. Fixed,
It is characterized by this.

  The length in the longitudinal direction of the first slit portion and the second slit portion may be substantially the same as the length in the width direction of the band portion of the belt clamp.

The method of attaching the belt clamp to the corrugated tube of the present invention is as follows.
A step of sequentially inserting a band portion of the belt clamp through a pair of first slit portion and second slit portion extending in a longitudinal direction across the crack portion of the corrugated tube and formed in the vicinity of the crack portion; ,
Inserting the wire harness into the corrugated tube so as to push the band portion of the belt clamp through the cracked portion of the corrugated tube;
A wire in the corrugated tube at the band portion of the belt clamp is fixed by inserting and fixing the tip portion of the band portion of the belt clamp from the second slit portion into the insertion hole of the band lock portion. Holding the harness; and
It is characterized by having.

  According to the first aspect of the present invention, since the band portion of the belt clamp is passed through the first slit portion and the second slit portion of the corrugated tube and the wire harness inside the corrugated tube is tightened, Opening of cracks, overlap between ends, and lateral displacement of belt clamps do not occur. As a result, there is no need to wrap the tape around the corrugated tube, the number of parts can be reduced as compared with the prior art, the cost can be suppressed, and the quality and appearance of the product can be improved.

  Further, the wire harness portion inside the corrugated tube is tightened by the band portion of the belt clamp, and the corrugated tube is not tightened, so that the corrugated tube is not deformed or crushed. As a result, the quality and appearance of the product can be improved, and variations in product intersection can be suppressed.

  In addition, since the portion of the wire harness inside the corrugated tube is directly tightened by the band portion of the belt clamp, it is not always necessary to use a corrugated tube having an inner diameter corresponding to the outer diameter of the wire harness. It can be flexibly handled with a general-purpose product of size.

Further , the belt clamp can be positioned accurately and reliably at the positions of the first slit portion and the second slit portion formed in the corrugated tube without causing lateral displacement.
Furthermore, since the pair of first slit portion and second slit portion are formed in the vicinity of the cracked portion, the holding area of the band portion for holding the wire harness increases, so that the wire harness can be securely tightened. Mounting becomes easy and workability is improved.

  According to the invention which concerns on Claim 2, the lateral shift | offset | difference of the longitudinal direction of a belt clamp can be prevented reliably.

According to the invention which concerns on Claim 3 , since the operation | work which winds a tape in order to prevent the opening of a corrugated tube and the horizontal shift | offset | difference of a belt clamp is unnecessary, working time can be shortened and working efficiency can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the member and part equivalent to the same as the past are attached | subjected the same code | symbol, and the description is abbreviate | omitted.

  FIG. 1 is a perspective view showing a structure for attaching a belt clamp to a corrugated tube according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is used in the embodiment of the present invention. It is a perspective view which shows a corrugated tube.

  As shown in FIGS. 1-3, the corrugated tube 1 used for the embodiment of this invention has the 1st slit part 1a and the 2nd slit part 1b which extended in the longitudinal direction on both sides of the crack part 1c. Is formed. The 1st slit part 1a and the 2nd slit part 1b may be previously formed in the corrugated tube 1, and may be formed in the existing corrugated tube 1 using jigs, such as a cutter.

  Further, the band portion 60a of the belt clamp 60 is inserted into the first slit portion 1a, holds the wire harness W in the corrugated tube 1, exits from the second slit 1b, and is inserted into the insertion hole 60d of the band lock portion 60b. It is inserted and fixed inside.

  The length d1 in the longitudinal direction of the first slit portion 1a and the second slit portion 1b is preferably substantially the same as the length d2 in the width direction of the band portion 60a of the belt clamp 60. As a result, the lateral displacement of the belt clamp 60 in the longitudinal direction can be reliably prevented.

  Moreover, it is preferable that the 1st slit part 1a and the 2nd slit part 1b are formed in the crack part 1c vicinity. As a result, the holding area of the band portion 60a for holding the wire harness W is increased, so that the wire harness W can be securely held, the attachment is facilitated, and workability is improved.

  4A to 4C are cross-sectional views for explaining a method of attaching the belt clamp to the corrugated tube 1 according to the embodiment of the present invention.

  First, the band portion 60a of the belt clamp 60 is passed through the first slit portion 1a and the second slit portion 1b of the corrugated tube 1 (see FIG. 4A).

  Next, the wire harness W is inserted into the corrugated tube 1 so as to push the band portion 60a of the belt clamp 60 through the cracked portion 1c of the corrugated tube 1 (see FIG. 4B).

  Next, the tip of the belt clamp 60 from the second slit portion 1b of the band portion 60a is inserted into the insertion hole 60d of the band lock portion 60b and fixed (see FIG. 4C). Accordingly, the wire harness W in the corrugated tube 1 is held by the band portion 60a of the belt clamp 60.

  Thereafter, if necessary, the excess band portion 60a is cut (see FIG. 2).

  According to the belt clamp attachment structure to the corrugated tube 1 according to the embodiment of the present invention, the band portion 60a of the belt clamp 60 is passed through the first slit portion 1a and the second slit portion 1b of the corrugated tube 1. Since the wire harness W inside the corrugated tube 1 is tightened, the opening and the end portions of the cracked portion 1c of the corrugated tube 1 are not overlapped and the lateral displacement of the belt clamp 60 does not occur. As a result, there is no need to wrap the tape around the corrugated tube 1, the number of parts can be reduced as compared with the prior art, the cost can be suppressed, and the quality and appearance of the product can be improved.

  Further, since the corrugated tube 1 is not fastened by the band portion 60a of the belt clamp 60, the corrugated tube 1 is not deformed or crushed. As a result, the quality and appearance of the product can be improved, and variations in product crossing can be suppressed.

Further, since the portion of the wire harness W inside the corrugated tube 1 is directly tightened by the band portion 60a of the belt clamp 60, the corrugated tube 1 having an inner diameter of a size corresponding to the outer diameter of the wire harness W is necessarily used. It is not necessary, and it can be flexibly handled with general-purpose products of various sizes.

  Furthermore, the belt clamp 60 can be positioned accurately and reliably at the position of the first slit portion 1a and the second slit portion 1b formed in the corrugated tube 1 without lateral displacement.

  According to the method of attaching the belt clamp to the corrugated tube 1 according to the embodiment of the present invention, it is not necessary to wrap the tape to prevent the corrugated tube 1 from being opened or the belt clamp 60 from being laterally displaced. It can be shortened and work efficiency can be improved.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical matters described in the claims.

  The present invention is used when attaching the belt clamp 60 to the corrugated tube 1 mounted on the outer periphery of the wire harness W routed in a vehicle such as an automobile.

It is a perspective view which shows the belt clamp attachment structure to the corrugated tube which concerns on the example of embodiment of this invention. It is the II-II sectional view taken on the line of FIG. It is a perspective view which shows the corrugated tube used for the embodiment of this invention. (A)-(C) are sectional drawings for demonstrating the belt clamp attachment method to the corrugated tube which concerns on the example of embodiment of this invention. (A) is a top view which shows the conventional corrugated tube, (B) is a top view which shows a normal belt clamp. It is explanatory drawing for demonstrating the belt clamp attachment method to the conventional corrugated tube, (A) And (D) is front sectional drawing, (B) And (C) is a side view.

Explanation of symbols

1: Corrugated tube 1a: First slit portion 1b: Second slit portion 1c: Crack portion 60: Belt clamp 60a: Band portion 60b: Band lock portion 60c: Locking portion 60d: Insertion hole W: Wire harness

Claims (3)

A corrugated tube attached to the outer periphery of the wire harness and having a crack formed in the longitudinal direction;
A band portion formed to extend in a band shape, a band lock portion provided at the base end of the band portion, and a lock that protrudes from the band lock portion and is locked in a lock hole of another member. A belt clamp having a portion;
Have
The corrugated tube is formed with a pair of first slit portions and second slit portions extending in the longitudinal direction across the crack portion and formed in the vicinity of the crack portion ,
The band portion of the belt clamp is inserted into the first slit portion, holds the wire harness in the corrugated tube, exits from the second slit portion, and is inserted into the insertion hole of the band lock portion. Fixed,
A structure for attaching a belt clamp to a corrugated tube.   2. The corrugated tube according to claim 1, wherein lengths of the first slit portion and the second slit portion in a longitudinal direction are substantially the same as a length in a width direction of a band portion of the belt clamp. Belt clamp mounting structure. In the mounting method to attach the belt clamp to the corrugated tube,
Extending the longitudinal direction across the crack portion of the corrugated tube and sequentially inserting the belt clamp band portion through the pair of first slit portion and second slit portion formed in the vicinity of the crack portion; ,
Inserting the wire harness into the corrugated tube so as to push in the band portion of the belt clamp through the cracked portion of the corrugated tube;
A wire in the corrugated tube at the band portion of the belt clamp is fixed by inserting and fixing the tip portion of the band portion of the belt clamp from the second slit portion into the insertion hole of the band lock portion. Holding the harness; and
A method for attaching a belt clamp to a corrugated tube.

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