JPH09139132A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach a grommet to a vehicle pannel easily with ordinary pull-in force, by connecting tongue-shaped holding parts to which a wire harness is fixed and a peripheral part of a grommet body by using a thin walled connecting body. SOLUTION: A grommet 1 has a grommet body 2 provided on a vehicle pannel and a wire harness pass-through hole 3 provided in the center part of the grommet body 2. There are further provided tongue-shaped holding parts 4 which protrude from a peripheral part of the wire harness pass-through hole 3 on one surface side of the grommet body 2 and are fixed to a wire harness 9 in a closely contacting manner, and thin-walled connecting parts 5a are formed between a base part of each of the tongue-shaped holding parts 4 and a peripheral part of the grommet body 2. Pull-in force F to the grommet 1 causes the tongue-shaped holding parts 4 to extend and also the connecting bodies 5a to be deformed. Shape of the peripheral part of the grommet body 2 is deformed to be distorted toward the inner circumference along the X1 -X2 direction of an oblong hole where the tongue-shaped holding parts 4 are formed. The grommet 1 thereby can be easily passed through and attached to an opening of the vehicle pannel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet for holding a linear body, and more particularly to a grommet for holding a wire harness of a wire harness and holding and fixing a wire harness having an arrangement path passing through an opening such as a vehicle panel. Regarding

[0002]

2. Description of the Related Art In recent years, the wiring route of a wire harness for a vehicle has become complicated and diversified as electric and electronic devices have been mounted on the vehicle, and a harness protector for avoiding interference with peripheral parts. Also, a wire harness holding or protection part such as a grommet used when a vehicle panel is routed through is widely used.

Particularly, in a wire harness having a path from an engine room to a driver's seat or a path from a vehicle body to a door section through an opening formed in a vehicle panel, the arrangement path is maintained, Integral grommets are commonly used to protect exposed wire harnesses. Conventionally, the shape of the grommet attached to the wire harness having the route from the vehicle body to the door portion is often formed integrally as shown in FIG. 3A, for example. The grommet 1a engaged with the door side and the grommet 1b engaged with the vehicle panel side are connected by a bellows-shaped protective tube 6. The shape of the door side grommet 1a will be described in detail. As shown in FIG. 3B, a through hole through which a wire harness penetrates at the center of the grommet main body 2 having an engaging portion 2a that engages with an opening on the door side. 3 is provided, and the through hole 3 is connected to the grommet 1b on the vehicle panel side via the bellows 6. A tongue-shaped holding portion 4 is provided on the outer peripheral portion of the through hole 3 of the grommet body 2.
2 are projected, and a thick connecting portion 5a connected to the grommet main body is provided at the base thereof. In addition, a tape fixing portion 4a that is folded back outward is formed at the tip of the holding portion 4 in order to secure a tight fixing force when fixing the tape to the wire harness.

In mounting such a grommet,
As shown in FIG. 4 (a), when the grommet 1 is attached to the vehicle panel 7, the engaging inclined portion 2 b of the grommet body 2 is applied to the end of the opening and the tongue-shaped holding portion 4 is tightly wound with the fixing tape 10. A force F is applied to the fixed wire harness 9 as shown by an arrow to draw it in, and the engaging portion 2a is engaged with the opening 8 (FIG. 4B).

[0005]

As shown in FIG. 5 (a), the mounting method as described above is used when the grommet 1 having the outer peripheral shape of the grommet body 2 is a perfect circle is attached to the opening (perfect circle). Since there is no shape restriction, the pulling force F
On the other hand, if the outer periphery is deformed to some extent, it is easy to mount it through the vehicle panel, but if the shape of the opening is an oblong hole due to the problem of space in the vehicle panel and doors, then as shown in FIG. In addition to the grommet shape, there are many restrictions in the direction in which the pull-in force is applied, and a sufficient force for deforming the outer circumference of the grommet body cannot be transmitted. That is, in the case of the opening shape of the elongated hole as shown in FIG. 5B, when the length L ₂ of the elongated hole in the extending direction is longer than L ₁ , the normal pulling force F is at both ends X of the elongated hole. _Since there is no transmission to the outer peripheral portion of the grommet main body 2 corresponding to ₁ and X ₂ and sufficient deformation cannot be generated, there is a problem that it cannot be easily attached through the opening portion. Therefore, a force equal to or greater than the normal pull-in force F is required, and there is a problem that the tape is not fixed to the wire harness 9 or the grommet 1 is damaged. The cause of such inconvenience is that the connecting body 5a connecting the tongue-shaped holding portion 4 and the grommet body 2 is thicker than the surrounding portion, so that the stretching force is poor and most of the pulling force F is tongue. This is because it was used for the extension of the shape holding portion 4 and the outer peripheral portion of the grommet body 2 was not sufficiently deformed.

The object of the invention of claim 1 is to solve the above problems and to transmit the pulling force sufficiently to the outer periphery of the grommet when the grommet is attached to the vehicle panel, so that the grommet can be easily attached by penetrating with the normal pulling force. Providing grommets that can Further, the invention of claim 2 aims to provide a grommet which is more excellent in the transfer characteristic of the pulling force than the grommet of claim 1 described above.

[0007]

In order to achieve the above-mentioned object, the invention according to claim 1 provides a grommet main body which is locked and fixed to a predetermined elongated hole opening, and which is provided through the grommet main body. A grommet having a linear body through-hole and a linear body penetrating the linear body through-hole, and a plurality of tongue-shaped holding portions protruding from the grommet body, It has a thin connecting body connected to the outer peripheral portion of the grommet main body from the base portion of the holding portion.

According to a second aspect of the present invention, in the grommet according to the first aspect, a joint body joint portion that covers the joint body and is connected to the outer peripheral portion of the grommet body from the tongue-shaped holding portion base portion. It is characterized by having. With such a configuration, in the invention of claim 1, since the thin connecting body that connects the tongue-shaped holding portion to which the linear body is fixed and the outer peripheral portion of the grommet body is provided, in addition to the tongue-shaped holding portion, The connecting body is deformed together with the outer peripheral portion of the grommet main body with respect to the drawn force, and it is possible to satisfactorily engage with the slotted vehicle panel opening.

Further, according to the second aspect of the invention, since the connecting body joint portion is provided so as to reinforce the connecting body structure, the pulling force applied to the tongue-shaped holding portion is more easily transmitted,
The outer peripheral portion of the grommet can be sufficiently deformed, and a better grommet mounting operation can be performed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments. FIG. 1 is a diagram showing a first embodiment of a grommet according to claim 1 of the present invention. In FIG. 1A, reference numeral 1 is a grommet of the present invention, and the grommet 1 has an engaging portion 2 that engages with an opening provided in a vehicle panel.
grommet body 2 provided with a and grommet body 2
A wire harness through hole 3 that is provided in the central portion of the wire harness, and a tongue-shaped holding portion 4 that protrudes from the outer peripheral portion of the wire harness through hole 3 on one surface side of the grommet main body 2 and that is tightly fixed to the wire harness; A thin connecting portion 5 a provided between the base of the tongue-shaped holding portion 4 and the outer peripheral portion of the grommet body 2 is formed. Further, on the other surface side of the grommet main body 2, there is provided a bellows (protection tube) 6 extending to the other grommet (not shown). Further, a tape fixing portion 4a for tightly fixing to the wire harness is formed at the tip of the tongue-shaped holding portion 4 so as to project outward. Here, as the material of the grommet, a commonly used integrally molded rubber such as ethylene / propylene rubber is used.

In the grommet 1 having such a structure,
The state of attachment of the vehicle panel to the opening will be described. FIG.
Like the X ₁ -X ₂ cross section shown in (b), the pulling force F to the grommet 1 extends the tongue-shaped holding portion 4 and deforms the connecting body 5 a provided on this base portion. Therefore, the shape of the outer peripheral portion of the grommet body 2 is deformed so as to be distorted in the inner peripheral direction in the X ₁ -X ₂ direction of the elongated hole formed with the tongue-shaped holding portion 4. In this way, sufficient deformation occurs with the pull-in force F similar to the conventional one, so that it is possible to easily attach the vehicle panel through the opening.

Next, FIG. 2 shows a second embodiment of the grommet according to claim 2 of the present invention. The description of the same configuration as the first embodiment is omitted. In FIG. 2 (a), the thin tongue-shaped holding portion 4 is connected to the outer peripheral portion of the grommet main body 2 so as to cover the thin connected body 5 a that connects the base portion of the tongue-shaped holding portion 4 and the outer peripheral portion of the grommet main body 2. The joint body joint portion 5b is formed planarly (actually, a curved surface).

In the grommet 1 having such a structure,
As shown in the X ₁ -X ₂ cross section shown in FIG. 2B, the pulling force F to the grommet 1 increases with the extension of the tongue-shaped holding portion 4.
Deforming the connecting body 5a and the connecting member Kutsugaetsunaga portion 5b, the shape of the grommet body 2 the outer peripheral portion, the X ₁ -X ₂ direction of the long hole, is deformed so as distorted inwardly. In this way, the pull-in force F causes the outer peripheral portion of the grommet body 2 to be sufficiently deformed, so that when the penetrating attachment to the opening portion of the vehicle panel is performed,
The engagement can be easily performed only by applying a weak force equal to or less than the conventional pulling force F. Therefore, the tape fixing state between the wire harness 9 and the grommet 1 is not deteriorated and the grommet 1 is not damaged.

In this embodiment, the connection body 5a is connected from the base portion of the tongue-shaped holding portion 4 to the outer peripheral portion of the grommet main body 2, but the present invention is not limited to this, and the tape fixing portion is not limited thereto. It may have a so-called triangular rib shape that is extended to the vicinity of 4a. Further, the tongue-shaped holding portion 4 protruding from the grommet body 2 does not have to be two pieces, and the shape of the grommet 1 and the wire harness 9
It goes without saying that the number of sheets may be two or more depending on the adhesion to

[0015]

As described above, according to the first aspect of the invention, the tongue-shaped holding portion to which the wire harness is tightly fixed by the fixing tape, and the grommet body outer peripheral portion having the engaging portion with the vehicle panel are provided. By connecting the thin connecting body with the thin connecting body, the pulling force applied to the tongue-shaped holding portion during the mounting process to the vehicle panel is transmitted to the grommet main body outer peripheral portion through the connecting body and the thin connecting body is formed together with the outer peripheral portion. Because of the deformation, even when the grommet is attached to the slot-shaped vehicle panel opening, good engagement can be easily performed.

According to the second aspect of the present invention, the structure of the connecting body is reinforced by providing the thin connecting body joint portion so as to cover the thin connecting body connecting the tongue-shaped holding portion and the grommet body. Further, the pulling force transmission characteristic of the connecting body is improved, the deformation of the grommet outer peripheral portion due to the pulling force applied to the tongue-shaped holding portion can be sufficiently generated, and good grommet mounting work can be performed with a smaller force.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a grommet according to claim 1 of the present invention.

FIG. 2 is a view showing a second embodiment of the grommet according to claim 2 of the present invention.

FIG. 3 is a diagram showing an example of a conventional grommet.

FIG. 4 is a view showing a mounting state of a conventional grommet.

FIG. 5 is a diagram for explaining a problem of a conventional grommet.

[Explanation of symbols]

 1, 1a, 1b Grommet 2 Grommet main body 2a Engaging portion 2b Engaging inclined portion 3 Wire harness through hole 4 Tongue-shaped holding portion 4a Tape fixing portion 5a Coupling body 5b Coupling body covering portion 6 Bellows (protection tube) 7 Vehicle panel 8 Opening 9 Wire harness 10 Fixing tape

Claims (2)

[Claims] 1. A grommet body which is locked and fixed to a predetermined elongated hole opening, a linear body through hole which is provided through the grommet body, and a linear body which penetrates the linear body through hole. And a tongue-shaped holding portion that is provided so as to project from the grommet body, and has a thin connecting body that is connected to at least the tongue-shaped holding portion base portion to the grommet body outer peripheral portion. Is a grommet. 2. The grommet according to claim 1, further comprising a joint body joint portion that covers the joint body and is connected to the outer peripheral portion of the grommet body from the tongue-shaped holding portion base portion.