JP2547347Y2 - Grommet - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a grommet such as a wire harness (hereinafter sometimes abbreviated as a wire or a harness) used for electric wiring of a vehicle such as an automobile, and more particularly to a grommet between a vehicle body and a door. The present invention relates to a rigid grommet inner suitable for being used by fitting to both ends of a grommet outer made of an elastic body used for wiring.

[0002]

2. Description of the Related Art When wiring inside a door of an automobile, a bellows-like flexible member made of an elastic material such as rubber is provided between both panels at a place where the body and the door are wired so as to follow the opening and closing movement of the door. A grommet outer is used.Furthermore, both ends of the grommet outer to be attached to both panels are fitted with a generally annular flange or flanged sleeve or a grommet inner in a tubular state, and these grommet are inserted into these grommet. It is housed through a wire harness to protect it.

[0003] In this wire harness passing operation,
The grommet outer can only be inserted from the end of the harness in advance by using its elasticity.However, as for the inner to be fitted to both ends, it is complicated or difficult to insert each from the end of the harness, so the inner is divided into two. (See Japanese Utility Model Application Laid-Open No. 62-14630) or a method in which one part of the circumference is cut off (see Japanese Utility Model Application Laid-Open No. 61-174118), and the middle part of the harness is inserted from the lateral direction. I can do it.

[0004] The latter of the conventional systems, ie, the one-point disconnection system, which is the system to which the present invention is applied, will be described below with reference to FIG.

In FIG. 11, the grommet inner A is
It has an annular shape made of a synthetic resin such as nylon, and has a slit portion a for separation on the circumference and a hinge portion b on the opposite side. With this hinge part b as a fulcrum, a slit part a
Is spread out from there, and the wire harness f is passed therethrough as shown by an arrow g, and is inserted into a wire storage portion (storage hole) e of a hole having an annular inner diameter. Next, the male lock C having a protruding shape is fitted into the female lock d having a rectangular hole while narrowing the slit portion a, and is locked by elasticity in the radial direction, thereby storing and setting a portion (cross section) perpendicular to the axis of the wire. .

[0006]

However, the conventional disconnection method loses lock when the wire is fully inserted into the wire storage portion, and cannot function as a grommet. There was a problem that lacked.

This is because the conventional structure has a structure in which the lock is performed by elastic displacement in the radial direction, and therefore, the lock is easily released due to the repulsion pressure of the storage wire in the radial direction, and the lock is released.

Accordingly, the present invention has been made to solve the above-mentioned problem by providing a grommet having a reliable lock structure in which the lock does not come off even if the grommet storage portion has a full wire. And

[0009]

According to the present invention, in order to achieve the above object, according to the first aspect, the invention has a contour shape such as a circle or an ellipse which is attached to a hole of a structure such as a vehicle body, and penetrates the hole. It has a storage hole that is substantially concentric with the contour for storing a long object to be substantially perpendicular to the axis, and also cuts off a part of the periphery, and also in the circumferential direction from a state in which both ends of the cutout coincide with each other,
Also, a cylindrical rigid grommet formed so as to be deformable to be separated in the axial direction, and a guide projection projecting radially at one end of the cut-off portion is integrally formed in the axial direction. At the other end, a guide groove engaging with the guide projection is provided in the axial direction, and a male lock and a female lock are provided at right angles to the engagement surfaces of the guide projection and the guide groove. The rigid grommet according to claim 1, wherein one of the ends is displaced in the axial direction so that the guide protrusion is slid into the guide groove to be fitted therein. Is a grommet that is incorporated into an elastic grommet outer.

[0010]

According to the first aspect of the present invention, the guide projection and the guide groove are engaged by sliding in the axial direction even if the wire is fully inserted into the storage hole and a radial force is applied. This engagement does not come off. In this case, even if a force such as twist is applied to the grommet, the engagement is not released due to the fitting of the female and male locks. As a result, the grommet maintains the normal state of storing the wires and the like, and its reliability is improved. Claim 2 is effective when used when wiring into the door of an automobile.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. First, the configuration will be described. FIG. 1 is a front view showing a state in which a grommet is spread, FIG. 2 is a perspective view showing a state immediately before sliding by displacing in an axial direction, and FIG. 3 is a front view showing a setting state after sliding is completed. . In these figures, a grommet inner 1 is made of a hard rigid synthetic resin, has a substantially elliptical contour, a flange portion 2 having a uniform width B, and the same shape and a height H separated by a width C from an inner periphery thereof. And a slit portion 4 for separating a part of the circumference, and a thin hinge portion 5 on the opposite side. Sleeve part 3
Is an elliptical wire storage portion (storage hole) 6.

An upper left end in FIG. 1 of the slit portion 4, which is a cut-off portion, forms a triangular prism-shaped guide projection 7 protruding in the radial direction (outside). The end is formed with a guide groove 8 (see FIG. 5) which engages with the guide projection 7, and these have a predetermined height H 'continuous with the sleeve portion 3. The height H ′ is slightly smaller than the height H of the sleeve 3. As shown in FIGS. 6 to 8, inside the guide projection 7, there is a claw 9 as a male lock having a slope 9 a inclined downward (toward the flange portion). As a female lock that fits with the male lock, there is a rectangular hole 10 cut to the lower end (the lower end of the flange portion 2).
In FIGS. 1, 2, 3, and 4, 12, 13, 14, and 1
Reference numeral 5 denotes a cantilever-shaped elastic piece which is attached to a vehicle body or the like after being assembled into a grommet outer as described later. The grommet inner 1 is formed such that the above portions are formed integrally and thinly so as to allow a moderate elastic deformation. For example, the grommet inner 1 is provided with a meat stealing portion 16 as shown in FIGS. It is.

Next, the operation of the above embodiment will be described with reference to FIG. As shown in FIG. 9, when used for wiring between the vehicle body panel 19 and the door panel 20 which opens and closes to the body panel 19, the grommet outer 17 made of a flexible elastic body with bellows is passed through the wire harness 18 in advance. . Then, as shown in FIG. 1, the slit portion 4 of the grommet inner 1 is widened, and the wire 18 is inserted from here into the wire housing portion 6.
Put in. Next, as shown in FIG. 2, the guide projection 7 is inserted into the guide groove 8 and slid by twisting, that is, displacing in the axial direction, both ends of the slit portion 4. When both ends are pushed down to the same height, the inclined surface 9a of the claw 9 enters the hole 10 while expanding the inner wall 11 outward (arrow D in FIG. 8), and locks as shown in FIG. That is, the engagement state of FIG. 3 is maintained. After the flange portion 2 of the grommet inner 1 in the engaged state, that is, the wire storage state, is pushed into the groove portion 21 of the grommet outer 17 and the sleeve portion 3 is pushed into the hole of the vehicle body panel 19, the mounting piece 12
15 fit into the holes and are securely attached by their elastic return. The grommet inner 1 is similarly attached to the door side.

In the above-mentioned mounting and storing process, even if the wire 18 is fully inserted into the wire storing portion 6 of the grommet inner 1, the force applied in that case depends on the direction of expanding the grommet, that is, FIG. In the direction of arrow E, the guide projection 7 and the guide groove 8 collide with each other on the guide surface G (see FIG. 6) and oppose this force due to their rigidity. Therefore, the locking claw 9 is in the hole 1
0, and reliably maintain the engagement state of FIG.

When the grommet inner 1 is engaged in the state shown in FIG. 3 and a force perpendicular to the paper surface, that is, an axial force is applied to one end of the engagement, the claw 9 may come off the hole 10. Although it is not known, such a force is not applied at the time of storing the wire, so there is no need to worry about it.

As described above, according to the embodiment, the lock shape is strong in the direction in which the force is applied by the wire, the lock is not released, and the reliability of the wire protection by the grommet can be improved.

FIG. 10 shows another embodiment. In this embodiment, a guide hole 8a is provided at the other end where a guide protrusion 7a having the same shape as that of the previous embodiment is fitted almost exactly, and a square hole 10a as a female lock is provided on an inner side wall 11a. The claw 9a as the male lock has the same shape as in the previous embodiment. In this case, the same operation as in all the embodiments is performed.

The positions and shapes of the male lock and the female lock in the previous embodiment are such that they engage with each other when the guide projections and the guide grooves are engaged and maintain the engaged state, that is, lock. It is not limited to the above-mentioned embodiment, since it may be provided at both ends.

Further, the present invention is not limited to the grommet inner fitted to the grommet outer, but is independently fitted in a hole of a structure such as a vehicle body to store and protect a wire harness penetrating the hole. The present invention can be similarly applied to a rigid grommet, and the insertion object as a long object is not limited to the wire harness.

[0020]

As described above, according to the present invention, a long-sized object to be stored in the grommet has a strong lock shape against a radial force in a plane perpendicular to the axis of the grommet, and the lock does not come off. There is an effect that the reliability of the device can be improved.

It is also effective when used for wiring in the door of an automobile.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention, showing a non-engaged state.

FIG. 2 is a perspective view showing a state immediately before engagement of FIG. 1;

FIG. 3 is a front view showing an engaged state of FIG. 1;

FIG. 4 is a bottom view of FIG. 3;

FIG. 5 is an enlarged perspective view of a main part of FIG. 2 viewed from another direction.

FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG.

FIG. 7 is a side view as viewed in the direction of arrow VII in FIG. 3;

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a partially broken side view showing a use state of the embodiment of FIG. 1;

FIG. 10 is a perspective view of a main part of another embodiment of the present invention.

FIG. 11 is a perspective view showing a conventional one.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grommet inner (grommet) 2 Flange part 3 Sleeve part 4 Slit part 5 Hinge part 6 Wire storage part (storage hole) 7 Guide projection 8 Guide groove 9 Male lock (claw) 10 Female lock (hole) 11 Inner side wall 12 Mounting piece 13 Mounting Piece 14 mounting piece 15 mounting piece 16 meat stealing part 17 grommet outer 18 wire harness (long object) 19 body panel 20 door panel

Claims (2)

(57) [Scope of request for utility model registration] 1. A storage hole having a contour shape such as a circle or an ellipse attached to a hole of a structure such as a vehicle body, and substantially concentric with the contour for storing a long object penetrating the hole in a state substantially perpendicular to the axis. And, a part of the periphery is cut off, a cylindrical rigid grommet formed so that it can be deformed in the circumferential direction from the state where both ends of the cut off coincide with each other and also in the axial direction. A guide projection projecting in the radial direction is integrally provided at one end of the cut-off portion in the axial direction, and a guide groove engaging with the guide projection is formed in the other end in the axial direction. Along with the provision, a male lock and a female lock which are fitted to the engagement surfaces of the guide protrusions and the guide grooves at right angles to the surface are provided, and at least one of the ends is displaced in the axial direction to slide the guide protrusions into the guide grooves. When engaged A rigid grommet with a sling fitted to a female lock. 2. A grommet obtained by incorporating the rigid grommet according to claim 1 as a grommet inner into an elastic grommet outer.