JP3823563B2 - Wire harness clamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clamp for a wire harness, and more particularly, to detach a wire harness from a vehicle body by dividing the clamp when the automobile is disassembled.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 8A and 8B, a clamp 1 for fixing a wire harness to an automobile panel is inserted into a fixing portion 2 attached to the outer periphery of the wire harness and an attachment hole of a vehicle body panel. The clip part 3 to be stopped is formed integrally with a synthetic resin.
[0003]
[Problems to be solved by the invention]
Recently, the necessity of separating and recycling materials for automobile parts has also increased, and not only can the wire harness be securely fixed to the body panel, but also the above-mentioned clamp can be easily removed from the body panel if necessary. That can be recycled. However, in the general clamp 1 described above, the fixing portion 2 and the clip portion 3 are configured integrally, and the clip portion 3 has a structure that is not easily removed once engaged with the mounting hole H. It was difficult to remove the wire harness at the time of dismantling.
[0004]
Therefore, it is desirable to have a structure in which the clip portion can be easily divided during disassembly. For this purpose, it is conceivable that the material of the clamp should be low in strength. However, the clamp for automobiles is required to have heat resistance and oil resistance because of the use conditions, so these conditions are satisfied. It is not easy to change to a material with the desired properties.
[0005]
Further, it is conceivable to reduce the locking force by reducing the thickness of the locking blades of the clip portion 3, but it is known that the plate thickness affects the bending strength by the third power. For this reason, since the locking force greatly fluctuates even with a slight dimensional crossing of the plate thickness, it is preferable to increase the locking force so that the locking force is not affected by the dimensional crossing, rather than reducing the plate thickness. However, if the plate thickness is increased, the plate thickness affects the locking force to the third power, so that the locking force becomes strong and the above recycling requirements cannot be met.
[0006]
Since the width dimension in the direction perpendicular to the bending direction with respect to the plate thickness only affects the locking force to the first power, it is better to change the dimension in the width direction to reduce the locking force. Does not cause variation in force. Therefore, it is conceivable to make the entire locking blade narrow so that it can be easily divided during disassembly, but the locking blade has a function of stably locking the periphery of the mounting hole of the vehicle body panel without swinging the clamp. Since it is necessary to make the locking blade narrow, the contact area with the peripheral portion of the mounting hole is reduced, and the locking stability of the clamp is lowered.
[0007]
Japanese Utility Model Laid-Open No. 7-41027 describes that the locking blades can be operated in the closing direction when the clamp is removed, and Japanese Patent Laid-Open No. 9-23542 discloses that the locking blades are reversed using a spacer. However, all of them have the disadvantage that the structure becomes complicated.
[0008]
The present invention has been made in view of the above-described problems, and when a certain pulling force is applied during disassembly, the workability of removing the wire harness from the vehicle body panel can be achieved by providing a structure in which the locking blade can be easily divided. It is a problem to improve.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention comprises, in claim 1, a fixing portion fixed to the wire harness and a clip portion locked to a locking hole formed in the vehicle body, and the clip portion is fixed. And a pair of cantilevered locking blades that are folded back and extended from both sides of the tip of the shaft, and engages the locking holes at the ends of the locking blades. In a clamp made of a resin molded product having a locking step,
The base part of the locking blade is made narrower than the width of the locking blade to form a split part ,
When removing the wire harness from the vehicle body, pulling the wire harness in the direction to remove the wire breaks the locking blade at the dividing portion, and the wire harness is removed from the vehicle body together with the clamp leaving a part of the tip of the locking blade. The clamp for wire harnesses characterized by having comprised is provided.
[0010]
The dividing portion is formed by notching both side surfaces in the width direction of the base portion of the locking blade, or by forming a hole in the center portion in the width direction of the base portion of the locking blade.
The notches on both side surfaces in the width direction may be rectangular or may be provided with inclined notches on both sides of the locking blade. In the case of providing the rectangular notch, a cut is provided at a length of 10% to 50% from the base of the locking blade with respect to the length of the locking blade from the attachment portion of the locking blade to the tip of the locking blade. It is preferable.
Moreover, it is preferable that the width | variety of the division part formed by providing a square notch on both sides of the base part of a locking blade shall be 60%-40% of the full width of a locking blade.
[0011]
When providing the notches inclined on both sides of the locking blade, the cut amount of the base portion on both sides in the width direction is maximized, and the cut width is gradually reduced toward the tip. Furthermore, as described above, a hole may be provided in the center in the width direction of the base of the locking blade, and the shape of the hole, such as a square hole or an elliptical hole, is not limited.
[0012]
With the above-described configuration, the locking blade is secured to the locking hole in the locking hole of the vehicle body panel. The locking stepped portion can be brought into contact with the peripheral edge in a wide range, so that the clamp can stably function as a clamp without wobbling. On the other hand, when the wire harness is disassembled, since the split portion is formed at the base portion of the locking vane, the locking vane is weaker than the other portions by pulling in the direction in which the wire harness is pulled apart. Divided. For this reason, the wire harness can be easily detached from the vehicle body panel together with the clamp except for the front end portion of the locking blade, which can contribute to the promotion of dismantling work for recycling.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment of a wire harness clamp according to the present invention, wherein the clamp 11 is made of a synthetic resin and is attached to the outer periphery of the wire harness W / H. And a clip portion 13 that is inserted into and fixed to the locking hole H of the vehicle body panel P. In the clamp according to the embodiment, the fixing portion 12 is a substrate type that is wound around and fixed to the outer periphery of the wire harness W / H with a tape T. Good.
[0014]
As shown in FIG. 2, the clip portion 13 has a shaft portion 13a projecting upward from the substantially center of the fixed portion 12, and is folded back on both sides from the tip of the shaft portion 13a and extends in the spreading direction. A pair of cantilever-like locking blades 13b and a pair of umbrella-shaped guide portions 13c projecting from the side portion of the shaft portion 13a in a direction intersecting the locking blades 13b. In the present embodiment, the shaft portion 13a is integrally sandwiched between the guide portions 13c on both sides. On the outer surface of the end portion of the locking blade 13b, a locking step portion 13d that elastically locks the locking blade 13b in the closed direction with respect to the inner periphery of the locking hole H of the vehicle body panel P. Is provided.
[0015]
At the base portion of the locking blades 13b on both sides, a dividing portion 13f is formed by providing square cutouts 13e on both sides to make them thinner than other portions. When the fixing portion 12 is pulled together with the wire harness W / H in the detaching direction, the dividing portion 13f is for weakening the strength so that the locking blade 13b is divided from the dividing portion 13f.
In the present embodiment, the width W2 of the dividing portion 13f is halved with respect to the width W1 of the locking blade 13b. Further, the length L2 of the dividing portion 13f is 40% of the length L1 from the root tip (continuous position with the shaft portion) to the tip of the locking blade.
The width W2 and the length L1 of the dividing portion are not limited. For example, when the conventional locking force is 15 kgf to 30 kgf, the width is set to be reduced to 11 kgf to 20 kgf.
[0016]
The guide portion 13c has an outer diameter corresponding to the inner diameter of the locking hole H of the vehicle body panel P, and when the guide portion 13c is inserted into the locking hole H, the clamp 11 is positioned at a fixed position.
[0017]
As shown in FIG. 3, the clamp 11 having the above configuration fixes the fixing portion 12 to the wire harness W / H with a tape T. Next, as shown in FIG. 4, when the clip portion 13 is inserted into the locking hole H of the vehicle body panel P, the locking blade 13 b bends and the locking step portion 13 d is locked to the edge of the locking hole H. Thus, the wire harness W / H is attached to the vehicle body panel P via the clamp 11.
[0018]
On the other hand, in order to remove the wire harness W / H from the vehicle body panel P when the vehicle is disassembled, the portion of the wire harness W / H attached by the clamp 11 is instantaneously pulled, as shown in FIG. The locking blade 13b is divided by the divided portion 13f whose strength is weakened. In this manner, the wire harness W / H is removed from the vehicle body panel P together with the clamp 11 while leaving a part of the tip of the locking blade 13b and is recycled.
[0019]
The present invention is not limited to the above-described embodiment, and as in the second embodiment shown in FIG. 6, the notches on both sides in the width direction of the locking blade 13b may be inclined and provided from the base to the tip. That is, a notch 13e is provided in which the both sides of the base portion have the deepest cut amount, and the cut amount gradually decreases toward the tip of the locking blade starting from the cut of the root portion.
[0020]
Further, as in the third embodiment shown in FIG. 7, a hole 13g is formed in the center in the width direction on the base side of the locking blade 13b, and narrow portions are provided on both sides of the hole 13g. The width portion may be divided portions 13f-1 and 13f-2.
[0021]
【The invention's effect】
As is apparent from the above description, according to the present invention, the wire harness can be easily detached from the vehicle body panel together with the clamp by applying an instantaneous pulling force to the wire harness when the vehicle is disassembled. Therefore, it can contribute to the separation disposal and recycling of the material of automobile parts.
[0022]
Further, according to the present invention, when the clamp is pulled and removed, the dividing portion is provided at the base portion of the locking blade where the stress is concentrated most, so that the clamp is easily divided. In addition, the locking blade of the clamp is provided with a notch or hole in the width direction to provide a narrow dividing portion. Therefore, compared with the case where the locking force is reduced by reducing the plate thickness, Therefore, the reliability of the clamp can be improved while reducing the locking force.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a wire harness clamp according to a first embodiment of the present invention.
FIG. 2 is an enlarged exploded perspective view of a clip portion.
FIG. 3 is a view showing a state in which a clamp is attached to a wire harness.
FIG. 4 is a cross-sectional view showing a state of attachment to a vehicle body panel.
FIG. 5 is an enlarged perspective view showing a clip portion divided from the dividing portion.
FIG. 6 is a perspective view showing a second embodiment of the present invention.
FIG. 7 is a perspective view showing a third embodiment of the present invention.
8A and 8B are diagrams showing a conventional clamp.
[Explanation of symbols]
W / H Wire harness P Car body panel H Mounting hole 11 Clamp 12 Fixing part 13 Clip part 13a Shaft part 13b Locking blade 13c Guide part 13d Locking step part 13e Notch 13f Dividing part

Claims (2)

It consists of a fixed part fixed to the wire harness and a clip part that locks into a locking hole drilled in the vehicle body. The clip part is folded back from both sides of the shaft part protruding from the fixed part and its tip. In a clamp comprising a pair of cantilevered extending locking blades and a resin molded product having a locking step portion engaged with the locking hole at the end of the locking blade,
The base part of the locking blade is made narrower than the width of the locking blade to form a split part ,
When removing the wire harness from the vehicle body, pulling the wire harness in the direction to remove the wire breaks the locking blade at the dividing portion, and the wire harness is removed from the vehicle body together with the clamp leaving a part of the tip of the locking blade. A clamp for a wire harness characterized by comprising.   The said parting part is formed by notching the both sides | surfaces of the width direction of the base part of a latching blade, notching, or providing the hole in the center part of the width direction of the base part of a latching blade. The clamp for wire harnesses of description.

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