JPH0523911Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a structure for attaching parts, and more specifically, the present invention relates to a structure for attaching parts, and more specifically, for example, when attaching grommets for piping such as fuel pipes and brake pipes to the body of an automobile. The present invention relates to a mounting structure for attaching a member having the following uses to the body of an automobile or the like.

(Prior Art) Conventionally, when attaching the above-mentioned members, for example, as shown in FIG.
A boss part 3 is provided on a piping grommet 2 equipped with The grommet 2 was attached to the body 6 by fitting the stud bolt 7 protruding from the grommet 6 and engaging the radial protrusion 8 provided on the inner circumference of the clip 5 with the thread groove of the stud bolt 7 ( 1986-
(See Publication No. 73987).

However, the above-mentioned prior art requires two steps: inserting the grommet 2 into the boss 3 and fitting the clip 5 into the stud bolt 7. When doing so, there is resistance due to the protrusion 8, so the clip 5 must be hammered in or screwed in with a considerably strong force, resulting in poor workability.

Therefore, the problem of this invention was to solve the above-mentioned disadvantages, and to make it possible to easily attach it to the body of an automobile, etc. in a single process.
The object of the present invention is to provide a mounting structure for members such as piping grommets.

Another object of the present invention is to provide a member mounting structure that allows the attached member to be easily removed once the member is desired to be removed.

(Means for solving the problem) A technical means for solving the above problem is to provide a boss part on a member made of elastically deformable synthetic resin that is attached to the body of an automobile, etc. The mounting structure is such that the member is removably attached to the body by fitting into a rod-shaped body protruding from the body, and the boss portion is integrated with the member via a support plate at the base end on the insertion side of the rod-shaped body. At the same time, the support plate and the boss portion are provided with a sub-slit for adjusting the rigidity, which faces the boss hole in the radial direction and is cut to a predetermined depth position of the boss hole. A main slit along the axial direction is provided in a peripheral wall portion of the boss portion in a direction different from the sub-slit, so that the peripheral wall of the boss portion divided by the main slit can elastically expand outward, and The tip of the rod-like body is provided with a head that has a conical shape with the tip end tapered and bulges outward in the radial direction, and a head tip of the rod-like body is provided on the inner periphery of the divided peripheral wall portion of the boss portion. The present invention is characterized in that a stopper for preventing the rod-shaped body from coming off, which is engaged with the outer periphery of the body with a gap therebetween, is bulged radially inward.

In the above technical means, the member attached to the body of an automobile or the like is not limited to a piping grommet, but includes various members such as a wire harness holder and a wind molding holder.

The rod-shaped body is not limited to a round rod-shaped body, but may also be a rectangular bar-shaped body whose cross section is triangular or quadrangular.

The boss portion is provided at an appropriate location depending on the shape, function, etc. of the member, and is not necessarily provided at the center of the member. Further, the shape of the boss portion may also be cylindrical or prismatic.

One or more boss portions are provided on the member.
When two or more bosses are provided, two or more corresponding rod-like bodies protruding from the body are also provided in the same positional relationship.

The boss portion is provided with one or more sub-slits and one or more main slits. In particular, in order to more easily expand the peripheral wall of the boss section divided by the main slits, it is desirable to provide two or more main slits at equal intervals in the circumferential direction of the boss section.

(Function) The attachment of the member to the body is completed by fitting the boss portion into the rod-shaped body from its base end side.

In this fitting operation, when the head of the rod-shaped body is inserted into the inner periphery of the boss part and hits the stopper of the boss part, the stopper is pushed by the insertion force of the head, so the stopper bulges out. The peripheral wall of the section elastically expands outward to allow the head to pass through.
The sub-slits adjust the rigidity of the base of the boss portion, and the main slits allow each peripheral wall of the divided boss portion 16 to expand elastically toward the outer wall. After the head passes the stopper, the expanding peripheral wall elastically returns to its original state, and the stopper engages with the head to prevent the rod from coming off. A gap into which a removal jig is inserted is formed on the outer periphery of the head end side of the rod-like body which is shaped to prevent it from coming off.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 5.

The grommet 10 for piping is integrally formed using a synthetic resin material, and includes a rectangular box body 11 formed in the center and formed on both sides of this box body 11, as shown in FIG. It consists of a pipe holding part 13 that can clamp a pipe 12 such as a fuel pipe or a brake pipe.

As shown in FIGS. 1 and 3, the box body 11 is a hollow box whose upper portion is closed by a support plate 14 and whose lower portion is open and provided with a die-cut hole 15. As shown in FIGS. A cylindrical boss portion 16 whose upper end is integrally formed with the support plate 14 is provided in the hollow portion so as to face downward at a constant distance from the inner circumferential wall portion of the box body 11.

The boss portion 16 is used to attach the grommet 10 to the body 17 by being fitted with a rod-shaped body 18 protruding from a body 17 of an automobile or the like.For this purpose, the rod-shaped body 18 and the boss portion 16 are arranged as follows. It is composed of

That is, as shown in FIG. 3, the rod-shaped body 18 has a shaft portion 20 having a thin neck 19 at its tip end, and a radially bulging portion integrally formed at the tip of the neck 19 with a step portion 21 interposed therebetween. It consists of a head 22. The head 22 is formed into a conical shape with a tapered end.

On the other hand, the peripheral wall of the boss part 16 has four main slits 23 cut from the tip (lower end) of the boss part 16 as shown in FIG. 2, and four main slits 23 as shown in FIGS. Four sub-slits 24 are cut from the support plate 14 integrated with the base end (upper end) of the boss portion 16 to the vertical center of the boss portion 16.
They are provided at equally spaced positions in the circumferential direction of the boss portion 16, respectively. However, the main slits 23 and the sub-slits 24 are formed alternately with an angular difference of 45° in the circumferential direction of the boss portion 16.
By adjusting the rigidity of the circumferential wall of the boss portion 16 by the main slit 23 and the sub-slit 24, the elastic deformability of each divided circumferential wall portion of the boss portion 16 can be increased.

Next, the boss hole 25 forming the inner peripheral part of the boss part 16
is shaped in a male-female relationship with the rod-shaped body 18 described above. That is, on the inner periphery of the peripheral wall of the boss portion 16, a stopper 26 is bulged inward in a shape corresponding to the neck 19 of the rod-shaped body 18, so that a small diameter constricted portion 27 into which the neck 19 is fitted is formed. and the rod-shaped body 18 is provided on the lower side of the constricted portion 27.
A large-diameter head accommodating portion 29 is formed via a step portion 28 that engages with the step portion 21 of the head. Head housing section 29
Since it is cylindrical, when it is fitted to the head 22 having a conical peripheral surface, a wedge-shaped gap 30 remains between the two in the form of an annular ring, as shown in FIG.

This embodiment is constructed as described above and has the following functions and effects.

That is, the pipe 1 is held in advance by the pipe holder 13.
The work of attaching the grommet 10 with the grommet 2 clamped to the body 17 can be completed by a single process of fitting the boss hole 25 of the boss part 16 into the rod-shaped body 18, so the work efficiency is good.

Further, in such an operation, when the head 22 of the rod-shaped body 18 is inserted into the boss hole 25, it is acted upon by the sub-slit 24 at the initial stage of insertion, and is acted upon by the main slit 23 at the latter stage of insertion. During insertion, there is some resistance at the small diameter constricted portion 27, but the insertion force of the head 22 pushes the stopper 26 outward in the radial direction, so the main slit 23 divides it into four parts as shown in FIG. boss part 16
The peripheral walls of each elastically expand outward. As a result, the resistance in the constricted portion 27 is not so large that the head 22 can be inserted with a small insertion force. This embodiment also has good workability in this respect. As described above, the rigidity of the base of each peripheral wall of the four-divided boss portion 16 is adjusted by the sub-slits 24, so that the base deforms in accordance with the outward expansion of the peripheral wall. Therefore, the insertion force of the head 22 can be further reduced.

The head 2 that has passed through the constriction section 27 in this way
2 is housed in the head accommodating portion 29 as shown in FIG. At this time, each circumferential wall of the four-divided boss portion 16 elastically returns to its original closed state, so the constricted portion 27 fits into the neck 19 of the rod-shaped body 18, and the stepped portions 21 and 28 mutually engage with. As a result, the rod-shaped body 18 cannot be removed from the boss portion 16, so there is no risk that the grommet 10 will fall off from the body 17.

In addition, when it is desired to temporarily remove the grommet 10 from the body 17 in order to modify the piping, etc., a cylindrical grommet can be inserted into the wedge-shaped gap 30 left annularly between the head 22 and the head accommodating portion 29 as described above. It is sufficient to press-fit the jig 31 (see Fig. 5). As a result, the circumferential wall of the boss portion 16 opens outward as shown in FIG. 4, so that the stepped portions 21 and 28 are disengaged and the rod-like body 18 can be pulled out from the boss portion 16.

(Effect of the invention) In the present invention, the boss portion is integrally formed with the member via the support plate at the base end on the insertion side of the rod-shaped body, and the support plate and the boss portion are provided in the radial direction of the boss hole. A sub-slit for rigidity adjustment is provided facing the boss hole and cut to a predetermined depth position of the boss hole, and a main slit along the axial direction is provided in a peripheral wall portion of the boss portion in a direction different from the sub-slit. By providing a slit so that the peripheral wall of the boss section divided by the main slit can elastically expand outward, it is possible to attach the piping grommet to the body of an automobile, etc. The work can be completed in a single process of fitting the boss part protruding from the body to the rod-shaped body protruding from the body, and it can be fitted with a small amount of force compared to the conventional mounting structure in which it is fitted to a stud bolt. I can do it.

From the above points, work efficiency is improved.

In addition, in the present invention, the tip of the rod-like body has a conical shape that is tapered on the tip side and has a head that bulges outward in the radial direction, and the inner periphery of the divided peripheral wall in the boss portion is provided with a head that bulges outward in the radial direction. The stopper for preventing the rod-like body from coming off, which is engaged with the outer periphery of the tip of the head of the rod-like body with a gap, is bulged inward in the radial direction. If you wish to remove the member from the body, it is convenient to press fit a cylindrical jig into the gap around the outer periphery of the head, allowing you to easily remove the member from the body.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a piping grommet according to an embodiment of the present invention, Fig. 2 is a view showing the main part of the bottom of the piping grommet, and Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 1. FIGS. 4 and 5 are cross-sectional views of main parts to explain the installation work of the piping grommet in the same embodiment, respectively, and FIG. 6 is a cut-away view of main parts showing a conventional example. be. 10...grommet, 11...box type, 1
3...Pipe holding part, 16...Boss part, 17...
Body, 18... Rod-shaped body, 22... Head, 23
...Main slit, 24...Sub-slit, 25...
Boss hole, 26...stopper.

Claims (1)

[Claims for Utility Model Registration] A boss part is provided on a member made of elastically deformable synthetic resin that is attached to the body of an automobile, etc., and the boss part is fitted to a rod-shaped body protruding from the body. A mounting structure for removably attaching the rod-shaped body to the body, wherein the boss portion is integrally formed with the member via a support plate at the insertion side proximal end of the rod-shaped body, and the support plate and the boss portion are provided with A sub-slit for rigidity adjustment is provided which is oriented in the radial direction of the boss hole and is cut to a predetermined depth position of the boss hole, and in a peripheral wall portion of the boss portion in a direction different from the sub-slit. A main slit is provided along the axial direction so that the peripheral wall of the boss portion divided by the main slit can elastically expand outward, and the tip of the rod-like body is provided with a conical shape that is tapered on the tip side. A rod-shaped head is provided on the inner periphery of the divided peripheral wall portion of the boss portion and is engaged with the outer periphery of the tip end of the rod-shaped body with a gap. A member mounting structure characterized by a stopper for preventing the body from coming off that bulges radially inward.