JP2715101B2 - Method for picking up wires such as clips and wire harnesses - Google Patents

Description

The present invention relates to a clip used for an electric wire such as a wire harness of an automobile or the like, and particularly to a body for an automobile or the like which is provided with a wire harness for a personal protection device in a collision accident. The present invention relates to a clip for installing and fixing and a method for anchoring an electric wire using the clip.

[Conventional technology]

FIG. 6 is a cross-sectional view showing an example of a conventional synthetic resin clip for arranging and fixing a wire harness to a body of an automobile or the like. A flesh portion 2 is formed, and a locking leg 4 of a central engaging portion 3 of the substrate 1 is erected, and a curved portion extending in the longitudinal direction of the substrate 1 is provided at an intermediate portion of the locking leg 4. Holding plate 5
And an end portion 6 having an umbrella-shaped cross section so that it can be fitted into a locking hole provided in the body by a snap action.

FIG. 7 is a sectional view showing a state in which the above-mentioned clip is attached to the electric wire W of the wire harness and this clip is attached to the body, and the same parts as those in FIG. 6 are denoted by the same reference numerals.

In FIG. 7, W is an electric wire of a wire harness, and a plastic tape 8 made of PVC or the like is provided along the substrate 1 of the clip.
The distal end 6 of the clip locking leg 4 is fitted into a locking hole 10 formed through the body 9 by a spring action, and is fixed by a pressing plate 5.

[Problems to be solved by the invention]

In order to protect the driver's body from the impact of a car collision, a device that detects the above impact and instantly inflates the airbag between the steering wheel and the driver has been realized. Even if equipped, the biggest problem is that the electric wire is cut off in the event of a collision accident, the explosive does not detonate and the airbag does not inflate, and to prevent this, the impact at the time of the collision is detected and the detonator is activated It is necessary to take measures to prevent the electric wire of the signal system to be broken by the impact.

It is extremely short until the sensor detects the impact and the explosive detonates, but if the wire breaks during this time, it will not explode, so at least immediately after the impact, Continuity must be maintained until the detonation takes effect.

The present invention has been made in order to solve such a problem, and provides a clip that does not disconnect an electric wire for operating a priming agent due to an impact at the time of a collision of an automobile, and also provides a termination method using the same. It is.

[Means for solving the problem]

In order to achieve the above object, the clip of the present invention is made of synthetic resin such as polyvinyl chloride, polyethylene, and polypropylene having flexibility as a whole, and an electric wire gripping portion for fitting and enclosing an electric wire, It comprises an engaging portion which can be locked and fixed to a body of an automobile or the like formed integrally with the grip portion.

In this wire gripping portion, a corrugated tube in which a wire such as a wire harness to be retained is fitted and fixed is inserted and supported, but the structure of the corrugated tube has a rectangular waveform and an axial wire insertion slit on the outer surface. The clip is fitted in advance to a retaining portion of an electric wire such as a wire harness, and this is fitted into an electric wire holding portion of the clip having the above structure.

In this case, the rectangular waveform on the outer surface of the clip and the triangular waveform on the inner surface of the wire gripper are fitted so that they do not come off under normal conditions. In order to avoid cutting, the load for releasing the gripping of the electric wire in the electric wire gripping portion is set to be smaller than the cutting load of the electric wire, thereby protecting the electric wire in the event of a collision.

Further, when the external force due to the impact is excessive, or when the direction of the external force is displaced from the axial direction (when a clip is used at the body corner), the harness is easily pulled off from the wire gripping portion to avoid cutting the wire. .

Specifically, the triangular waveform on the inner surface of the wire gripper and the rectangular waveform on the outer surface of the corrugated tube are normally engaged, but when a certain force is applied, the triangular waveform on the inner surface of the wire gripper becomes An axial shift causes slight slack in the wire to help the wire escape cutting. If it is anticipated that an external force greater than the fitting force will be applied before the harness is fixed to the body, seal it with a temporary fixing cover to prevent the wire from being detached from the insertion opening of the wire gripping part. It is.

(Operation)

Since the clip according to the present invention has the above-described structure, it is easy to attach the vehicle to the body of the vehicle, and if an electric wire such as a wire harness is fixed using the clip, a collision of the vehicle may occur. If so, the impact exerts tension on the clip. At this time, by a load smaller than the cutting load of the electric wire of the wire harness, the connection between the rectangular corrugated tube fitted to the fixed portion of the electric wire and the electric wire gripping portion having a triangular corrugated inner surface fitted with the rectangular corrugated tube is fitted. When the wire is released from the right side of the gripping portion due to the elasticity of the wire gripper against the external force in the axial direction and the displacement of the wire gripper against the external force other than the axial direction, the slackness of the wire in the harness, and the influence of the tension due to the fixing. And disconnection can be prevented.

〔Example〕

FIG. 1 is a front view showing a state where a corrugated tube 13 having an outer surface having a rectangular waveform 11 used in the present invention and having a single insertion slit 12 is attached to an electric wire W constituting a wire harness, FIG. 2 accommodates the corrugated tube 3 into which the wire harness of FIG. 1 is fitted, and temporarily fixes the wire holding portion to be fitted and held, the engaging portion to be locked and fixed to the automobile body, and the opening of the wire holding portion. FIG. 5 is a perspective view showing a temporary fixing cover, which has a triangular waveform 14 on an inner surface of an electric wire gripping portion 15 and has an opening 16 at an upper portion, and a temporary fixing cover 17 for temporary fixing is provided thereon. Use). An engaging portion 18 is provided at a lower portion of the wire gripping portion 15, and the engaging portion is provided with a locking leg portion 19 standing substantially below the center, and a downwardly curved pressing plate 20 is provided above the engaging leg portion 19. A fitting portion 21 is provided at the tip of the fitting portion 21 so as to be fitted into a locking hole provided in a panel or the like by snap action.

FIG. 3 is a cross-sectional view showing a fitting relationship between the rectangular waveform 11 of the corrugated tube 3 and the triangular waveform of the inner surface of the electric wire gripping portion 15,
It will be understood that the mating is easily released when a certain force is applied.

In particular, when the triangular waveform has a tapered shape having a gentle angle, the detachment is easy.

FIG. 4 is a front view showing a state where the wire harness is attached to the body with a clip, and FIG. 5 is a side view of the same. However, the locking leg 19 of the engaging portion 19 is pushed into the engaging hole 23 of the body 23 and engaged therewith.

In such a state, the electric wire W forming a wire harness having a signal line for transmitting a signal to the airbag detonator by detecting an impact at the time of a collision is held by the corrugated tube 13 in the axial direction thereof with a suitable holding force. Wire W that forms a wire harness when tension is applied to the clip
The gripping force is determined such that the gripping state of the wire gripper 15 is released when the cutting load is equal to or less than the cutting load.

Therefore, for example, the body 22 is deformed by an impact at the time of a collision, and the electric wire W forming the wire harness via the clip is formed.
When a large tension is instantaneously applied to the wire, it is possible to avoid the disconnection and the slack of the wire against the external force in the axial direction. In addition, when the external force is excessive and the force in the direction different from the axial direction (opening direction), as shown in FIG. By instantaneously inflating the airbag without disconnecting the electric wire of the signal line, it is possible to prevent an accident that causes serious injury to the driver's body.

The temporary fixing cover seals the opening by the design of the clip, prevents the harness from coming off from the clip until the harness is locked and fixed to the vehicle body, and facilitates the work of attaching the clip. After fixing the harness, the temporary fixing cover may be removed to release the gripping state of the harness by a predetermined external force.

〔The invention's effect〕

As described above, according to the present invention, the clip holding the wire harness forming the signal line to the airbag detonator is locked and fixed to the body side by the engaging portion, and momentary due to external force at the time of collision. Even if tension is applied to the clip, the holding portion of the wire harness is configured to be displaced in the axial direction below the cutting load of the wire harness and is easily detached from the opening, so that The wire harness is not cut at the time of collision,
Since the airbag can be inflated by operating the detonator properly, the safety of the driver's body at the time of a collision can be ensured.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a corrugated tube is fitted to an electric wire, FIG. 2 is a perspective view showing an example of a clip body of the present invention, and FIG. FIG. 4 is a sectional view showing a mating state, FIG. 4 is a front view showing a state where the wire harness is attached to the clip of the present invention,
FIG. 5 is a side view, FIG. 6 is a cross-sectional view showing an example of a conventional clip, and FIG. 7 is a cross-sectional view of an attached state using the clip. W: Wire harness 11: Rectangular waveform 12: Insertion slit 13: Corrugated tube 14: Triangular waveform 15: Wire gripper 16: Opening 17: Temporary fixing cover 18: Engagement 19 … Legs 20… Holding plate 21… Fitting and locking part 23… Length hole 24… Body

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 57-82626 (JP, U) Japanese Utility Model 54-15296 (JP, U) Japanese Utility Model 55-73682 (JP, U) Japanese Utility Model 60-60 62823 (JP, U) Fully open Showa 62-165716 (JP, U) Really open Showa 61-17510 (JP, U)

Claims (3)

(57) [Claims] The present invention comprises a synthetic resin having flexibility, a rectangular corrugated outer surface on which a fixed portion of an electric wire such as a wire harness is inserted and fitted and covered, and has a single insertion slit. In a clip for fixing a corrugated tube, an electric wire gripping portion having a triangular waveform on an inner surface having a triangular waveform to be fitted with a rectangular waveform on an outer surface thereof when the corrugated tube is inserted, and having a single insertion opening, The gripping portion is formed integrally with an engaging portion that can be locked and fixed to a body of an automobile or the like, and a load for releasing the gripping of the electric wire in the electric wire gripping portion is smaller than a cutting load of the electric wire. Clip featuring 2. The clip according to claim 1, further comprising a temporary fixing cover capable of sealing an opening of the wire gripping portion until the wire is gripped and the engaging portion is fixed to the body. 3. An engaging portion of the clip according to claim 1 is locked and fixed to a body of an automobile or the like, and a corrugated tube having a rectangular corrugated outer surface is fixed in advance on a fixing portion of an electric wire such as a wire harness. In advance, a corrugated tube fixed to the electric wire is inserted into the electric wire gripping portion of the clip, and the triangular waveform on the inner surface of the electric wire gripping portion and the rectangular waveform on the surface of the corrugated tube are fitted and held. Method of pulling wires such as wire harnesses, in which the force acting in the axial direction of the wire causes slip between both waveforms to release the fitting gripping