JPH054967Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a grommet for treating a foaming agent used when filling a foaming agent into a closed section of a car body. This invention relates to a grommet for disposing of discharged blowing agent.

Prior Art As described in Japanese Patent Application Laid-Open No. 48-2631, foaming agents,
For example, some materials are filled with urethane to minimize weight increase and effectively improve rigidity.

This is done by injecting a urethane stock solution through an injection port formed in the closed cross section and foaming the urethane stock solution within the closed cross section, so that the urethane is tightly packed over the entire surface of the closed cross section. As a result, the strength of this closed section can be improved.

Problems that the invention aims to solve However, in the case of such conventional products, since holes are bored in the closed section for pressure relief during foaming, the foam that is foamed through these holes is The agent overflows and sticks to the painted outer surface of the closed section. Then, it takes a lot of effort to peel off this foaming agent from this outer surface, and when it is removed, it damages the coating film and causes rusting. In addition, since the foaming agent is filled to the fullest in these holes, it is not possible to attach watertight grommets to these holes.
A problem arises.

Means for Solving the Problems In order to solve the problems of the conventional technology, this invention is designed to inject a foaming agent into the closed section of the vehicle body and cause the foam to fill up the closed section. A grommet for treating a foaming agent used in a vehicle, wherein the grommet body is formed of synthetic resin into a roughly funnel shape, and a small diameter portion of the grommet body is fitted with a hole formed in the closed section of the vehicle body. The grommet is characterized by a foaming agent treatment grommet with a joint formed therein.

According to this method, first, the fitting portion of the foaming agent treatment grommet of this invention is fitted into the pressure relief hole formed in the closed section.

When the foaming agent injected into the closed section foams and overflows from the hole, the overflowing foaming agent accumulates inside the grommet body.

Thereafter, when the fitting portion of the foaming agent treatment grommet is removed from the hole, the overflowing foaming agent can be easily removed together with the foaming agent treatment grommet. Therefore, since the foaming agent does not adhere to the surface of the closed cross section as in the conventional case, there is no need to remove it from the outer surface of the closed cross section, and at the same time, there is no damage to the painted surface.

Furthermore, since the fitting part extends somewhat into the closed section from the hole, when the fitting part is removed, the foaming agent is removed to the inside of the hole. This makes it possible to attach a watertight grommet to this hole.

Furthermore, since this foaming agent treatment grommet is made of synthetic resin, it is easy to separate from the foaming agent, and the foaming agent can be easily removed from this foaming agent treatment grommet, making it possible to reuse it and reducing costs. It is also advantageous.

Example This invention will be explained below based on examples.

1 to 4 are diagrams showing an embodiment of this invention.

First, to explain the structure, the foaming agent treatment grommet 11 of this embodiment has a member 12 and a panel 13.
This is used when filling urethane as a foaming agent into the closed cross section 14 formed by the above.

This member 12 has a hat-shaped cross section, and has a plurality of holes 12b bored in the upper surface 12a for pressure relief during urethane foaming, and has a flange 12.
c is spot-welded to the panel 13, thereby forming a closed cross-section portion 14 with the panel 13.

On the other hand, the foaming agent processing grommet 11 of one embodiment of the present invention is made of synthetic resin, for example, polypropylene, and has a grommet body 11a roughly shaped like a funnel, and a small diameter portion of the grommet body 11a has a member. The hole 12 formed in 12
A fitting portion 11b is formed to be fitted to the portion b.

Next, the blowing agent treatment grommet 1 having such a configuration is
How to use 1 will be explained.

First, before injecting the urethane stock solution into the closed section 14, the fitting part 11b of the foaming agent treatment grommet 11 is fitted into the hole 12b formed in the member 12, and the grommet 11 is installed as shown in FIG. . Then, the urethane stock solution is injected from an injection port (not shown). Then, after a certain period of time has elapsed, this stock solution begins to foam, and the closed section 14 is filled with the urethane 15. This filling improves strength while minimizing weight increase.

Due to the foaming in this case, a portion of the urethane 15 overflows from the hole 12b of the member 12, but this remains in the grommet body 11a as shown in FIG. Thereafter, by removing the fitting part 11b of the foaming agent treatment grommet 11 from the hole 12b of the member 12, the grommet 1 can be removed as shown in FIG.
Urethane 15 overflowing with 1 can be removed very easily.

Therefore, the urethane 15 does not adhere to the outer surface of the closed section 14 as in the conventional case, and the effort of peeling off the urethane 15 is saved, and at the same time, the coating film is not damaged.

In addition, the foaming agent processing grommet 11 in the installed state
Since the fitting portion 11b extends to the inside of the hole 12b of the member 12, by removing this grommet 11, the urethane 15 can be removed to the inside of the hole 12b of the member 12 as shown in FIG. As a result, it becomes possible to attach watertight grommets, which was previously impossible.

Further, since the foaming agent treatment grommet 11 is made of polypropylene, the urethane 15 can be easily peeled off from the grommet 11, so that it can be easily reused.

By the way, such a grommet 11 for treating a foaming agent can of course be applied to the case where a hood 17 of a vehicle body is filled with urethane 15, as shown in FIGS. 5 to 8.

This hood 17 is formed of a hood outer 18 and a hood inner 19, and a closed cross section 20 is formed by both 18 and 19. Urethane 15 is filled in this closed section 20 in the same manner as in the above embodiment. The filling positions are range a (front end 17a of the hood) and range b (from near the center 17b to the rear end 17c) in FIG.
The filling of the urethane 15 into this area b is carried out by arranging a partition wall 21 near the central portion 17b as shown in FIG. 8 to prevent the urethane 15 from flowing forward.

In this way, urethane 1 is applied to the range a of the front end 17a.
5, the reinforcement or the like for improving the strength of the attachment part of the striker 22 can be eliminated or downsized, leading to weight reduction. In addition, this front end portion 17
Since the entire closed cross-section portion 20 of a is filled with urethane 15, the striker 22 is released when the hood 17 is closed.
It is possible to ensure the strength against the impact load input from the front end portion 17a, and also to prevent the hood outer 18 and the like from being dented uniformly over the entire length of the front end portion 17a.

Furthermore, by filling the area b with urethane 15, the strength of the hood hinge attachment part 23 can be ensured, and at the same time, by disposing it with the partition wall 21,
Because it is possible to create a difference in strength between the urethane-filled area and the unfilled area, the hood 1
7 is easily broken from the central portion 17b, improving shock absorption.

In addition, the foaming agent treatment grommet 11 of this invention
can also be applied to those shown in FIGS. 9 to 13.

This closed cross-section portion 25 is formed of a member 26 and a panel 27, and a net-like reinforcing member 28 is disposed inside this closed cross-section portion 25 as shown in FIG. are filled as shown in FIG. By arranging such a reinforcing member 28, the increase in weight can be minimized and the strength can be effectively improved. Instead of this reinforcing member 28, as shown in FIG.
It is also possible to use a reinforcing member 29 in which a plurality of holes 29a are formed to allow the passage of the reinforcing member 29.

Furthermore, when a plurality of holes 30a are formed in the plate-shaped partition wall 30 as shown in FIG. 13, the urethane 15 leaks from the holes 30a as shown in FIG. Since the image is blurred, changes in stiffness can be made more gradual.

Effects of the invention As explained above, according to this invention,
By using grommets for foaming agent treatment,
Just by removing this grommet, you can dispose of the foaming agent that overflows from inside the closed cross section, which does not take the time and effort required in the past, and does not damage the paint film. It is possible to attach a watertight grommet to the hole in the part, and since this grommet is made of synthetic resin, it is easy to separate from the foaming agent, so it can be easily reused. exert beneficial effects.

[Brief explanation of the drawing]

Figures 1 to 4 are views showing one embodiment of this invention, where Figure 1 is a cross-sectional view taken along the - line in Figure 4, and Figure 2 is a cross-sectional view corresponding to Figure 1 showing the urethane filling state. 3 is a cross-sectional view corresponding to FIG. 2 showing the state in which the foaming agent processing grommet is removed from the state shown in FIG. 2, and FIG. 4 is a perspective view showing the usage state of the foaming material processing grommet Figures 5 to 8
The figures show the state of filling urethane into parts different from those in the above embodiment; Fig. 5 is a back view of the hood;
Figures to Figures 8 are the - line of Figure 5, respectively.
9 and 10 are cross-sectional views taken along lines - and -, respectively, showing the urethane-filled state with a reinforcing member provided, and Fig. 9 showing a state in which a mesh-like reinforcing member is set inside the closed cross-section. An exploded perspective view, FIG. 10 is a cross-sectional view showing a state in which the reinforcing agent is provided, FIG. 11 is a front view showing a modified example of the reinforcing agent, and FIGS. 12 and 13.
The figure shows the state of urethane filling using partition walls.
FIG. 12 is a sectional view of the filled state, and FIG. 13 is a perspective view of the partition wall. 11... Grommet for foaming agent treatment, 11a...
Grommet body, 11b...fitting part, 14,2
0, 25...Closed section, 12b...Hole, 15...
Urethane (foaming agent).

Claims (1)

[Scope of Claim for Utility Model Registration] A grommet for treating a foaming agent used for filling a foaming agent into the closed cross section of a vehicle body by injecting the foaming agent into the closed cross section of the vehicle body and causing the foam to foam, the grommet body comprising: for treating a foaming agent, characterized in that the grommet is formed of synthetic resin into a roughly funnel shape, and a fitting part is formed in the small diameter part of the grommet body to be fitted into a hole opened in the closed section of the car body. Grommet.