JPH06203679A - Grommet - Google Patents

Abstract

PURPOSE:To provide grommets normal one of which can be replaced properly with special one of which wherein the normal one is a grommet whose auxiliary insertion hole is closed and the special one is a grommet whose part to be removed is removed and an auxiliary insertion hole is opened. CONSTITUTION:A soft type grommet 21 and a hard type grommet 22 are united by fitting a substrate part 34 in a fitting recessed part 28. An auxiliary insertion hole 15 in which an electric cable 16 of another part can be inserted and a storage recessed part 32 opened in the fitting recessed part 28 side are formed in the base part 24 of the soft type grommet 21. An auxiliary hole part 37 which can be communicated with the auxiliary insertion hole 15 and a projected part 36 are formed in the substrate part 34 of the hard type grommet 22 wherein the part 36 is projected toward the direction to be fitted with the fitting recessed part 28 and can be both inserted in the auxiliary insertion hole 15 and put in the storage recessed part 32 selectively. In the case the projected part 36 is put in the storage recessed part 32, the auxiliary insertion hole 15 is opened to make it possible to insert an electric cable 16 in and in the case the projected part 36 is inserted in the auxiliary insertion hole 15, the auxiliary insertion hole 15 is closed and sealing the auxiliary insertion hole is surely achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet for penetrating a wire bundle or the like into a panel or the like.

[0002]

2. Description of the Related Art As a conventional grommet of this type, the one shown in FIGS.
No. 45074).

The grommet 2 is mounted in, for example, a through hole 1a of a dash panel 1 which divides an engine room and a vehicle interior of a vehicle, and has a main body base 3A and a flange 3B which constitute a grommet main body 3, An insertion hole 5 into which the wire harness 4 which is a bundle of electric wires is inserted is formed in the main body base 3A and the flange 3B. Substantially hollow cylindrical support parts 6 and 7 are extended from the main body base part 3A and the flange part 3B, respectively, and the main body base part 3A, the flange part 3B and the support parts 6 and 7 are integrally formed by an elastic rubber member. Has been done.

The insertion hole 5 is formed on both end surfaces 6a, 7 of the supporting portions 6, 7.
Projections 8 and 9 that open at a and support the outer periphery of the wire harness 4 are provided on the inner walls 6b and 7b of the support portions 6 and 7 near the openings at both ends of the insertion hole 5. A groove 10 is formed between the main body base 3A and the flange 3B so as to be fitted with the through hole 1a when the panel 1 is attached to the panel 1, and the flange 3B is provided with the panel 1 between the main body base 3A and the flange 3B. A lip portion 11 that sandwiches and seals the through hole 1 a is provided so as to project along the outer periphery of the groove portion 10.

A projecting portion 12 is provided on the collar portion 3B so as to be substantially parallel to the supporting portion 7. The protrusion 12 includes an auxiliary support 13 having a substantially hollow cylindrical shape and having an inner diameter smaller than that of the supports 6 and 7, and a removed portion 14 that closes a hollow 13c in the auxiliary support 13 with a tip. The auxiliary support portion 13 and the removed portion 14 are integrally formed with the collar portion 3B. Tsubabe 3
B includes a hollow portion 13 in the main body base 3A and the auxiliary support portion 13.
A communication hole 3a for communicating with c is formed, and the hollow portion 13c
Serves as an auxiliary insertion hole 15 through which another electric wire, the bonnet release wire 16 and the like can be inserted when the removed portion 14 is removed. The inner wall 13a of the auxiliary support portion 13 is provided with a ridge 17 for supporting the outer periphery of the bonnet release wire 16, and the outer periphery of the auxiliary support portion 13 adjacent to the removal target portion 14 is used for removing the removal target portion 14. Cutting position (Fig. 5 (a))
A recess 13b indicating AA) is formed.

When it is not necessary to separately penetrate the bonnet release wire 16 through the panel, as shown in FIG. 5A, the recess 13b of the auxiliary supporting portion 13 is not cut, and the removed portion 14 is left as it is. If the removed portion 14 remains, the auxiliary insertion hole 15 is closed, so that the sealing performance is maintained without water leakage or the like.

On the other hand, when the wire harness 4 is penetrated through the panel 1 and an electric wire is separately penetrated in addition to the wire harness 4 or the bonnet release wire 16 is inserted, as shown in FIG. The auxiliary support 13
Is removed at the recess 13b to remove the removed portion 14, and the bonnet release wire 16 is inserted through the opened auxiliary insertion hole 15. In addition, a part of the main body base 3A has a main body base 3A.
Is formed with a notch 3c that communicates the inside and the outside of the bonnet, and the bonnet release wire 16 is disposed outside the grommet 2 through the notch 3c.

That is, according to such a grommet 2, in addition to the panel through hole 1a for inserting the wire harness 4 and the grommet 2, it is necessary to separately provide a panel through hole for inserting the bonnet release wire 16 and a grommet. Therefore, the number of parts can be reduced and work efficiency can be improved.

[0009]

However, in such a grommet 2, the distinction between the normal product in which the auxiliary insertion hole 15 is closed and the special product in which the auxiliary insertion hole 15 is opened is performed. Since it is performed only by the presence or absence of the removing portion 14, it is difficult to instantly distinguish the two when inserting the wire harness 4 into the grommet 2. For this reason, if the two are separately inserted in the same step, the work becomes complicated, and there is a possibility that they may be erroneously mounted.
In particular, if a special product is mistakenly inserted into the wire harness 4 that is supposed to be inserted into a normal product, the opened auxiliary insertion hole 15 cannot be closed and the grommet 2 must be replaced. It was

Further, since the work of cutting the auxiliary support portion 13 at the recess 13b is required, the workability is poor, the skill is required for the work, and it is difficult to improve the productivity.

The present invention has been made in order to solve such a conventional problem, and the purpose thereof is to appropriately change a normal product having an auxiliary insertion hole closed and a special product having an opening. It is to provide a grommet that can.

[0012]

In order to achieve the above object, the present invention provides a base portion having an insertion hole for inserting an electric wire or the like formed substantially at the center, and a fitting recess formed in the base portion. A soft grommet provided with a support portion that is erected from a base portion and that supports the electric wire and the like inserted therethrough, a substrate portion that is fitted into the fitting recess, and a peripheral wall portion that is erected from the substrate portion, A grommet comprising a hard grommet having a flexible locking part provided on the peripheral wall part, wherein the soft grommet and the hard grommet are integrated by fitting the board part in the fitting recess. , The base portion of the soft grommet is provided with an auxiliary insertion hole through which another wire or the like can be inserted, and a housing recess opening to the fitting recess side, and the base portion of the hard grommet can communicate with the auxiliary insertion hole. And auxiliary holes,
Provided with a protrusion projecting in the fitting direction with the fitting recess and capable of selecting both insertion into the auxiliary insertion hole and accommodation in the accommodation recess, and when the protrusion is accommodated in the accommodation recess, the auxiliary insertion A hole is opened to communicate with the auxiliary hole portion, and the auxiliary insertion hole is closed when the protrusion is inserted into the auxiliary insertion hole.

[0013]

[Function] When the soft grommet and the hard grommet are integrated by fitting the base plate portion into the fitting concave portion so as to accommodate the protrusion in the accommodating concave portion, the auxiliary insertion hole opens and communicates with the auxiliary hole portion. Another wire or the like can be inserted from the auxiliary insertion hole to the auxiliary hole portion.

When the soft grommet and the hard grommet are integrated by fitting the base plate portion into the fitting recess so that the projection is inserted into the auxiliary insertion hole, the projection inserts the auxiliary insertion hole. The waterproof property of the auxiliary insertion hole can be obtained.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a grommet according to an embodiment of the present invention, (a) shows a state in which an auxiliary insertion hole is opened, and (b) shows a state in which the auxiliary insertion hole is closed. Shows. Further, FIG. 2 is a perspective view showing a state in which the grommets are separated. The same parts as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted.

The grommet 20 comprises a soft grommet 21 and a hard grommet 22.

The soft grommet 21 is used for the wire harness 4
A base portion 24 in which an insertion hole 23 through which the
And a substantially cylindrical support portion 25 provided upright on one end side from the base portion 24, and these are integrally formed by an elastic rubber member. The inner wall on one end side of the support portion 25 is provided with a ridge 25 a that seals and supports the outer periphery of the wire harness 4.

A peripheral wall 26 extends toward the other end of the peripheral edge of the base 24, and a holding portion 27 is formed at the tip of the peripheral wall 26 so as to be bent toward the insertion hole 23. A fitting recess 28 having the other end opened is formed inside the base 24 surrounded by the peripheral wall 26 and the holding portion 27, and a lip portion 29 is provided at the tip of the peripheral wall 26.

A substantially cylindrical auxiliary support portion 30 having a smaller diameter than that of the support portion 25 is erected on one end side of the base portion 24, and the hollow inner diameter portion of the auxiliary support portion 30 is located on the one end side with the fitting concave portion 28. An auxiliary insertion hole 15 that communicates with the outside is configured. The inner wall of the auxiliary insertion hole 15 on one end side is provided with a ridge 15a that seals and supports the outer periphery of the bonnet release wire 16 inserted into the auxiliary insertion hole 15.

A protrusion 31 is provided on one end of the base 24 at a position symmetrical to the auxiliary support 30 with the insertion hole 23 interposed therebetween. Inside the protrusion 31, the protrusion 31 is opened toward the fitting recess 28. An accommodating recess 32 is formed.

The hard grommet 22 has a hole 33 at the substantially center thereof.
And a peripheral wall portion 35 provided upright from the substrate portion 34, and these are molded of synthetic resin.

The substrate portion 34 is formed in a substantially disc shape so that it can be fitted into the fitting recess 28 of the soft grommet 21. The board portion 34 is provided with a substantially columnar projection 36 projecting in the fitting direction with the fitting recess 28, and is provided at a position symmetrical to the projection 36 with the hole 33 of the board portion 34 interposed therebetween. The hole 37 is formed so as to penetrate therethrough.

The projection 36 has a shape and dimension that allows both the insertion of the soft grommet 21 into the auxiliary insertion hole 15 and the accommodation into the accommodation recess 32. The board portion 34 is fitted into the recess 28.
When the projecting portion 36 is housed in the housing recess 32 at the time of fitting, the auxiliary insertion hole 15 opens and communicates with the auxiliary hole portion 37, as shown in FIG. Further, when the protrusion 36 is inserted into the auxiliary insertion hole 15, as shown in FIG.
The outer periphery of 6 is sealed by the protrusion 15a, and the auxiliary insertion hole 15 is closed.

A flexible locking arm 39 having a lock claw 38 is provided on the peripheral wall portion 35, and the lock claw 38 and the flexible locking arm 39 form a flexible locking portion. There is. The tip of the peripheral wall portion 35 is curved inward to form a substantially circular opening 40.

The hard grommet 2 in this embodiment is used.
As shown in FIG. 3, the second member 2 is dividable at the line of symmetry between the protrusion 36 and the auxiliary hole 37. One of the divided hard grommets 22 has a locking projection 4 on one side 22a.
1, the other 22b is provided with an engaging recess 42, and the engaging projection 41 is engaged with the engaging recess 42 to integrate them.

Soft grommet 21 and hard grommet 22
To integrate and, the board portion 34 is fitted into the fitting recess 28. As a result, the substrate portion 34 is held by the holding portion 27 and the integrated grommet 20 is formed. The wire harness 4 is inserted into the integrated grommet 20 through the insertion hole 23 and the opening 40.

To mount the grommet 20 on the panel 1, the hard grommet 22 is inserted into the panel through hole 1a. When the hard grommet 22 is inserted into the panel through hole 1a, the flexible locking arm 39 bends and the lock claw 38 is locked to the peripheral edge of the panel through hole 1a. As a result, the lock claw 3
8 and the lip 29 hold the panel 1, and the grommet 20 is fixed. At this time, the lip 29
Seals the panel through hole 1a by surrounding it from the outside.
The panel through hole 1a is reliably sealed.

When such a grommet 20 is used as a normal product, when the board portion 34 is fitted into the fitting recess 28, the projection 36 is housed in the housing recess 32, and the auxiliary insertion hole 15 and the auxiliary insertion hole 15 are supported. The hole 37 is communicated. As a result, the bonnet release wire 1 is inserted into the auxiliary insertion hole 15.
6 can be inserted.

On the other hand, when the grommet 20 is used as a special product, the fitting position of the base plate portion 34 and the fitting concave portion 28 is shifted by about 180 ° from the state of the normal product, and the protrusion 3 is formed.
6 is inserted into the auxiliary insertion hole 15 so that the auxiliary insertion hole 15 is closed. As a result, the sealing performance of the auxiliary insertion hole 15 is ensured.

That is, the same grommet 20 can be properly used as a normal product and a special product only by changing the relative fitting positions of the soft grommet 21 and the hard grommet 22, and high versatility can be obtained. .

Further, even if a special product is mistakenly used for a portion where a normal product should be used, the soft grommet 21 and the hard grommet 22 are inserted into the insertion hole 23 and the opening 40 while the wire harness 4 is still inserted. A normal product can be obtained simply by changing the fitting position of. As a result, the complicated work of replacing the grommet 20 with another grommet is unnecessary, and the workability of attaching the grommet 20 to the wire harness 4 is improved.

Further, the conventional work of cutting the auxiliary supporting portion and the like is eliminated, and the productivity and the workability of mounting the grommet 20 are improved.

Furthermore, when the soft grommet 21 and the hard grommet 22 are fitted together, the projection 36 is always in the state of being accommodated in the accommodation recess 32 or the state of being inserted in the auxiliary insertion hole 15. Therefore, the soft grommet 21 And hard grommet 22
Relative rotation with is blocked. As a result, deterioration of the soft grommet 21 is prevented, and durability can be improved.

[0035]

As described above, according to the grommet according to the present invention, a normal product and a special product are appropriately selected,
In addition, since it can be changed easily, high versatility can be obtained. Also, the workability of attaching the grommet to the electric wire is improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a grommet according to an embodiment of the present invention, (a) shows a state in which an auxiliary insertion hole is opened,
(B) has shown the state which closed the auxiliary insertion hole.

FIG. 2 is a perspective view showing a separated state of the grommet of FIG.

FIG. 3 is a perspective view showing a divided state of the hard grommet of FIG.

FIG. 4 is a partial cross-sectional view of a conventional grommet.

5A and 5B are enlarged views of a portion B in FIG. 4, in which FIG. 5A shows a state before the removed portion is removed, and FIG. 5B shows a state after the removed portion is removed.

[Explanation of symbols]

4 wire harness (electric wire etc.) 15 auxiliary insertion hole 16 bonnet release wire (or other electric wire etc.) 20 grommet 21 soft grommet 22 hard grommet 23 insertion hole 24 base 25 support part 28 fitting recess 32 accommodating recess 33 hole part 34 Substrate 35 Peripheral wall 36 Projection 37 Auxiliary hole

Claims (1)

[Claims] 1. A base part having an insertion hole for inserting an electric wire or the like formed substantially in the center, a fitting recess formed in the base part, and a support part standing from the base part for inserting and supporting the electric wire or the like. A flexible grommet including: a base portion fitted into the fitting recess; a peripheral wall portion erected from the base portion; and a flexible locking portion provided on the peripheral wall portion. A grommet made of a hard grommet, which is formed by integrating the soft grommet with the hard grommet by fitting the substrate part in the fitting recess, and another wire or the like can be inserted into the base part of the soft grommet. An auxiliary insertion hole and an accommodating concave portion that opens toward the fitting concave portion are provided, and in the board portion of the hard grommet, an auxiliary hole portion that can communicate with the auxiliary insertion hole and a fitting direction of the fitting concave portion are provided. Insertion into the auxiliary insertion hole and the accommodation recess And a protrusion that can be accommodated in the auxiliary recess are accommodated in the accommodation recess, the auxiliary insertion hole opens and communicates with the auxiliary hole, and the protrusion is inserted in the auxiliary insertion hole. A grommet characterized in that the auxiliary insertion hole is closed when inserted.