JPH0523354U - Grommet - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention aims to prevent the lock release of the grommet and improve the reliability of the lock structure. The present invention has a contour shape such as a circle or an ellipse that is attached to a hole of a structure such as a vehicle body, and stores a long object penetrating through the hole substantially concentric with the contour. A cylindrical rigid grommet having a hole and a part of which is cut away, wherein a guide projection protruding in the radial direction is provided at one end of the cut part, and a guide projection is provided at the other end. A guide groove for engaging with is provided in the axial direction, and at least one of the end portions is displaced in the axial direction so that the guide projection is slid into the guide groove for engagement.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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 an elastic body used for wiring between a vehicle body and a door. The present invention relates to a rigid grommet inner suitable to be used by being fitted to both ends of the grommet outer.

[0002]

[Prior Art]

 When wiring inside the door of an automobile, a flexible bellows-like grommet outer made of an elastic material such as rubber is used between the two panels at the location where the car body and the door are wired to follow the opening / closing movement of the door. Also, at both ends of this grommet outer, which will be the mounting part to both panels, fit a roughly annular flange or flanged sleeve or cylindrical grommet inner, and pass the wire harness through these grommets. I try to store it and protect it.

In this wire harness threading work, the grommet outer has to be put in from the end of the harness beforehand by utilizing its elasticity. Since it is complicated or difficult to insert, there is a method of dividing the inner into two (see Japanese Utility Model Publication No. 62-14630) or a method of separating one part of the circumference (see Japanese Utility Model Publication No. 61-174118). The device is designed so that the middle part of the harness can be inserted laterally.

Hereinafter, the latter of the conventional methods, that is, the one-point separation method, which is the method to which the present invention is applied, will be described with reference to FIG.

In FIG. 11, the grommet inner A is an annular shape made of a synthetic resin such as nylon, has a slit portion a for separation on the circumference, and has a hinge portion b 1 on the opposite side. The hinge portion b is used as a fulcrum to widen the slit portion a, and the wire harness f is inserted through the slit portion a as shown by an arrow g into a wire accommodating portion (accommodating hole) e having an annular inner diameter. Next, while narrowing the slit portion a, the protruding male lock C is fitted into the rectangular hole-shaped female lock d and locked by the elasticity in the radial direction to set the wire in the direction perpendicular to the axis (cross section). Is.

[0006]

[Problems to be solved by the device]

 However, the conventional disconnection type has a problem that the lock is disengaged when a full wire is inserted in the wire storage portion and the function as a grommet cannot be achieved, resulting in lack of reliability.

This is because the conventional structure has a structure to be locked by elastic displacement in the radial direction, so that it easily spreads with respect to the repulsive pressure in the radial direction of the storage wire and the lock is released.

Therefore, the present invention solves the above-mentioned problems by providing a grommet having a reliable lock structure in which the lock does not come off even when the grommet housing portion is filled with the full wire. The purpose is to

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, this 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. It is a cylindrical rigid grommet that has a storage hole that is substantially concentric with the contour to be stored in a state, and has a peripheral part cut away, and projects in the semi-radial direction at one end of the cut part. A guide protrusion is provided, and a guide groove that engages with the guide protrusion is provided at the other end in the axial direction, and at least one of the ends is displaced in the axial direction so that the guide protrusion slides in the guide groove. In the second aspect, the rigid grommet according to the first aspect is incorporated into the elastic grommet outer as the grommet inner.

[0010]

[Action]

 According to the first aspect of the present invention, since the guide projection and the guide groove are engaged by sliding in the axial direction even if the wire is fully inserted in the housing hole and a radial force is applied, the rigidity of The engagement does not come off. In that case, if the grommet is twisted or some other force is applied, the lock may be released, but such a force cannot be applied to the wire storage part. As a result, the grommet maintains the normal state of storing wires and the like, and its reliability is improved. The second aspect of the invention is effective when it is used for wiring in the door of the automobile.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. First, to explain the structure, FIG. 1 is a front view of the grommet in an expanded state, FIG. 2 is a perspective view of a state immediately before sliding by axially displacing, and FIG. 3 is a front view of a set state in which slide is completed. is there. In these figures, the grommet inner 1 is made of a hard rigid synthetic resin, has the same shape with a flange portion 2 having a substantially elliptical contour and a uniform width B, and an inner circumference and a width C thereof, and a height H. And a slit portion 4 for cutting off a part of the circumference, and a thin hinge portion 5 on the opposite side. The inner hole of the sleeve portion 3 is an elliptical wire storage portion (storage hole) 6.

One end on the upper left side in FIG. 1 of the slit portion 4 which is a separated portion is formed with a triangular prism-shaped guide projection 7 protruding in the radial direction (outside), and the other on the lower right side. The ends are formed with guide grooves 8 (see FIG. 5) that engage with the guide protrusions 7, and these have a predetermined height H ′ continuous with the sleeve portion 3. This height H'is slightly smaller than the height H of the sleeve portion 3. As shown in FIGS. 6 to 8, inside the guide protrusion 7, there is a pawl 9 as a male lock having an inclined surface 9a inclined downward (toward the flange portion), and also on the inner wall 11 of the guide groove 8. As a female lock that fits with the male lock, there is a rectangular hole 10 cut into the lower end (the lower end of the flange portion 2). In addition, in FIGS. 1, 2, 3 and 4, 12, 13, 14 and 15 are cantilever-shaped and elastic, and are mounting pieces for mounting on a vehicle body or the like after being mounted on a grommet outer as described later. .. The grommet inner 1 is configured such that the above parts are formed integrally and thin to allow appropriate elastic deformation. For example, as shown in FIG. 5 and FIG. It is a thing.

Next, the operation of the above embodiment will be described with reference to FIG. As shown in FIG. 9, when it is used for wiring between the vehicle body panel 19 and the door panel 20 that opens and closes, the grommet outer 17 made of a flexible elastic body with a bellows is previously passed through the wire harness 18. .. Then, as shown in FIG. 1, the slit portion 4 of the grommet inner 1 is expanded, and the wire 18 is inserted into the wire storage portion 6 from here. Next, as shown in FIG. 2, the both ends of the slit portion 4 are twisted, that is, displaced in the axial direction, and the guide protrusion 7 is inserted into the guide groove 8 and slid. When pushed in until both ends are at the same height, the slope 9a of the claw 9 expands the inner wall 11 in the outer direction (arrow D in FIG. 8) into the hole 10 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 this engaged state, that is, the wire accommodated state is pushed into the groove portion 21 of the grommet outer 17, the sleeve portions 3 are pushed into the holes of the vehicle body panel 19 so that the mounting pieces 12 to 15 are attached. It fits securely in the hole and its elastic return ensures a secure attachment. The grommet inner 1 is also installed on the door side in the same manner.

Even if the wire storage portion 6 of the grommet inner 1 is filled with the wire 18 in the mounting and storing process described above, the force applied in that case is in the direction of expanding the grommet, that is, as shown in 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 to this force due to their rigidity. Therefore, the locking claw 9 does not disengage from the hole 10, and the engaged state of FIG. 3 is reliably maintained.

Thus, in the engaged state of the grommet inner 1 shown in FIG. 3, if 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 from the hole 10. It is not known, but such a force is not applied when the wire is stored, so there is no need to worry about it.

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

FIG. 10 shows another embodiment. In this embodiment, a guide hole 8a into which a guide projection 7a having the same shape as that of the previous embodiment is fitted is formed at the other end, and an inner wall 11a thereof is provided with a square hole 10a as a female lock. The claw 9a as the male lock has the same shape as in the previous embodiment. Also in this case, the same operation as that of all the embodiments is performed.

It should be noted that the positions and shapes of the male lock and the female lock in the previous embodiment are such that they are fitted to each other when the guide projection and the guide groove are engaged with each other to maintain the engaged state, that is, they are locked. Since it may be provided at both ends, it is not limited to the above-mentioned embodiment.

Further, the present invention is not limited to the grommet inner fitting to the grommet outer, but it is inserted into a hole of a structure such as a vehicle body by itself, and protects a wire harness penetrating the hole. The same can be applied to the rigid body grommet, and the insertion object as a long object is not limited to the wire harness.

[0020]

[Effect of the device]

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

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

[Brief description of 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 the state of FIG. 1 immediately before engagement.

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

FIG. 4 is a bottom view of FIG.

5 is an enlarged perspective view of the main part of FIG. 2 seen from another direction.

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

FIG. 7 is a side view taken along the line VII of FIG.

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

9 is a partially cutaway side view showing a usage state of the embodiment of FIG.

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

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

[Explanation 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 protrusion 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 product) 19 Body panel 20 Door panel

Claims (2)

[Scope of utility model registration request] 1. A storage hole that has a contour shape such as a circle or an ellipse that is attached to a hole of a structure such as a vehicle body, and that is concentric with the contour for accommodating a long object penetrating the hole in a state substantially perpendicular to the axis. And a cylindrical rigid grommet with a part of the periphery cut off, provided with a guide projection protruding in the radial direction at one end of the cut-off portion, and a guide projection at the other end. A rigid grommet in which a guide groove to be engaged is provided in the axial direction, and at least one of the ends is axially displaced so that the guide projection is slid into the guide groove to be engaged. 2. A grommet in which the rigid grommet according to claim 1 is incorporated into an elastic grommet outer as a grommet inner.