JP2001315665A - Soft foam base material and parts mounting structure using the soft foam base material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soft foam base material allowing a locking fixture to be positively locked into a mounting hole. SOLUTION: With the use of this soft foam base material 11 with an aluminum tape 13 provided at a foam base material part 11a so as to cover an opening to be a part opposed to a clip hole 6, and the open edge part of the hole, even if the soft foam base material 11 is mounted to block the clip hole 6, the soft foam base material 11 foams without reaching the open edge part of the clip hole 6, and the locking fixture 8 and the open edge part of the clip hole are directly engaged with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft material used for allowing a fastener such as a clip to be inserted from a mounting hole in a closed cross-section structure when the structure is reinforced with a hard filling member. The present invention relates to a foam base material and a component mounting structure using the foam base material.

[0002]

2. Description of the Related Art In a car body, particularly a frame part (pillar, side sill, frame, etc.) having a closed cross section, a thermosetting hard foam base material (hard filling member) is provided to prevent collision and vibration. Are foamed and filled in the closed cross section of the skeletal component to increase the rigidity of the skeletal component with a hard filler to be filled or to suppress the vibration of each part of the component.

[0003] As shown in Fig. 7 (a), a rigid foamed base material b is provided in a closed cross section of a skeleton member a (for example, a member formed by combining an inner panel and an outer panel into a cylindrical shape). Here, it is adhered to the inner surface of the skeleton member a), and this is heated from the outside, for example, foamed by utilizing the heat of the baking process of the coating line, and the inside of the closed cross section of the skeleton member a is foam-filled, that is, This is a technique of filling a space of a closed cross section with a hard member [(FIG. 7B)].

[0004] However, when there are mounting holes for mounting various fitting parts, for example, clip holes c in the frame member a, as shown in FIG. 7B, the clip holes c are closed with foamed hard portions. I will be.

[0005] In view of the above, a technique has been proposed in which an outfitting part can be attached using a soft foam base material (Japanese Patent No. 2903196).

[0008] As shown in FIG. 8 (a), a soft and hard foam base material b is provided on the back side of the clip hole c (inside the frame member a) so as to close the opening of the clip hole c. A flexible foamed base material e having a higher reaction rate is attached, and the foamed base material e is foamed in the same heating step as the hard foamed base material b. This is a technique for forming a region in the cross section that allows insertion from the clip hole c. According to this, even if the hard foamed base material b foams, the clip hole c remains as it is in the region allowing the insertion from the clip hole c, as shown in FIG. 9A from the clip hole c. When the substantially conical claw portion g of the clip f serving as the locking tool is inserted, the clip f advances so as to push away the soft foamed portion h and fits into the clip hole c.

[0007]

However, the claws g of the inserted clip f may come off.

As a result of investigating this factor, it was found that the soft foamed base material e
Is attached to the inner surface of the skeletal member a, so that even if the soft foam portion h is pushed away by inserting the claw g of the clip f,
As shown in FIG. 9B, a soft foam portion h remains attached to the opening edge of the clip hole c, and the foam portion h is located between the opening edge of the clip hole c and the claw g. It was found that this caused the engagement between the clip hole c and the claw portion g to be incomplete. Specifically, the soft foamed portion h entering the opening edge of the clip hole c and the claw g inhibits the movement of the claw g of the clip f trying to return to the opening side, and the pull at the claw g is pulled. The slack surface formed by the foamed portion h makes the claw portion g easy to slide toward the opening edge portion, and this causes the claw portion g of the clip f once inserted. Was easy to escape. Moreover,
Since the claw g of the clip f is caught not by the opening edge of the clip hole c but by the foamed portion h, there is no sense of moderation when the clip f is caught by the clip hole c, and it is determined whether or not the clip f is caught. There was a problem that the worker could not do it.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a flexible foam base in which a stopper inserted from a mounting hole can be locked to an opening edge of the mounting hole. An object of the present invention is to provide a component mounting structure using a material and a foam base material.

[0010]

According to a first aspect of the present invention, there is provided a flexible foamed base material having an opening and an opening edge provided at a portion of the base material facing a mounting hole of a structural member. Even if a soft foam base material is attached so as to cover the mounting hole, adopting a structure in which a sheet member is provided to cover the part,
The flexible foamed base material foamed without reaching the opening edge of the mounting hole.

[0011] Thus, when the locking member for fixing the component is inserted from the mounting hole after the soft foamed base material is foamed, the locking member pushes away the sheet member.
Since the opening edge of the mounting hole is exposed, the locking device and the opening edge are directly locked, and complete engagement between the locking device and the opening edge of the mounting hole is achieved. Will be done.

[0012] In addition to the above object, the flexible foamed member according to the second aspect has an outer shape of the flexible foamed base material that can be attached to the structural member without dropping off the flexible foamed substrate to which the sheet member has adhered. It is formed so as to protrude from the periphery, and the protruding portion is directly adhered to the inner surface of the structural member. Can be attached to

According to a third aspect of the present invention, in order to attain the above object, the component mounting structure is provided on an inner surface of the structural member so as to cover the mounting hole and to allow insertion from the mounting hole into a closed cross section of the structural member. A flexible member is formed between the flexible member and a portion facing the opening of the mounting hole and the edge of the mounting hole. When inserted from the hole, the sheet member is pushed away by the locking tool to expose the opening edge of the mounting hole, and the locking tool and the opening edge are directly locked, Complete engagement is achieved between the locking tool and the opening edge of the mounting hole.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.

In FIG. 1, reference numeral 1 denotes, for example, 4 to which the present invention is applied.
1 shows a vehicle body constituting a door type passenger car.

The vehicle body 1 shows a state before assembly in which the components are assembled in the vehicle body assembling process and painted in the baking coating process, and before the outfitting process.

Of the skeletal members having a closed cross section constituting the vehicle body 1, for example, substantially the entire inside of the front pillar 2 (corresponding to the structural member of the present application) is subjected to foam filling.

Specifically, as shown in FIG. 2, for example, the front pillar 2 is formed by welding a front pillar inner panel 3, a front pillar outer panel 4, which is closest to the vehicle interior, and a side outer panel 5, which is closest to the vehicle exterior. It has a cylindrical shape, and a portion surrounded by the front pillar inner panel 3 and the front pillar outer panel 4 and a portion surrounded by the front pillar outer panel 4 and the side outer panel 5, respectively, have a closed cross section. In the panel portion of the front pillar inner panel 3, for example, clip holes 6 (corresponding to mounting holes of the present application) are formed at predetermined intervals in the longitudinal direction. However, the clip hole 6 is provided, for example, with a harness clip 8 (corresponding to a locking device of the present application), for example, a harness 7 used for signal transmission, which is provided on the front pillar 2 indicated by a two-dot chain line in FIG. It is used to fix by inserting. The inner cavity surrounded by the front pillar inner panel 3 and the front pillar outer panel 4 and the inner cavity surrounded by the front pillar outer panel 4 and the side outer panel 5 are, for example, both inner and outer surfaces of the front pillar outer panel 4. The thermosetting foamed filler, for example, the thermosetting foamed sheet 10 adhered to each of the above is solidified by foaming and filling by heating. 10a indicates a hard portion formed by foaming the foam sheet 10.

As shown in FIG. 2, each mounting hole 6 is provided between the mounting hole 6 and the foamed hardened portion opposed thereto.
A flexible foamed base material, for example, a flexible foamed sheet 11 adhered so as to close the opening is foamed. Soft foam sheet 1
1 is a soft foam material that shows a faster reaction than the curable foam sheet 10, and the sheet 11 foams before the curable foam sheet 10 foams, so that the opening of the clip hole 6 is softened. It is closed with a certain soft foam layer P, and an area is formed on the front side in the clip insertion direction to allow the insertion of the claw 8a of the harness clip 8 from the clip hole 6.

A tape member (corresponding to a sheet member of the present invention), for example, an adhesive surface (weak) on both sides is provided between the soft foam layer P and the opening of each of the clip holes 6 and the opening edge of the opening. ) Is interposed, and the tape 13 covers the opening of the clip hole 6 and the opening edge of the opening from the inner surface side of the inner panel. Thus, when an external force of a predetermined value or more is applied to the aluminum tape portion closing the clip hole 6, the aluminum tape portion attached to the opening edge of the mounting hole 6 is peeled off, and the opening edge of the clip hole 6 appears. It is.

In this embodiment, a flexible foam sheet 11 with an aluminum tape as shown in FIGS. 3A and 3B is used so that the peeling structure can be easily obtained.

Here, the structure of the flexible foam sheet 11 is as follows.
Steps until the inside of the front pillar 2 is foam-filled with the sheet 11 and the curable foam sheet 10 will be described together with steps.

The foam filling is carried out by diverting the steps until the vehicle body 1 is completed. Therefore, if the flow until the vehicle body 1 is completed is simplified, the vehicle body 1 is fully assembled in the vehicle body assembling process as is well known, and thereafter,
Enter the painting line. After finishing the painting through the electrodeposition process and the baking process of the painting line, the vehicle body 1 goes to the outfitting process and the final assembling process to become a product.

The foam filling of the front pillar 2 is performed by utilizing a part of the space between the front pillars.

Here, the flexible foam sheet 11 is shown in FIG.
(A) and (b), a sheet-shaped base portion 11a including the clip hole 6 and sized to cover the periphery of the clip hole 6, an opening of the clip hole 6, and an opening edge of the opening. It is combined with an aluminum tape 13 having an outer shape large enough to cover only the part. More specifically, the flexible foam sheet 11 is provided with an aluminum tape 1 on a portion of the base portion 11a facing the clip hole 6 and the opening edge of the hole 6.
3 is attached using an adhesive surface on the side surface to make it into one component. The base portion 11a is made of aluminum tape 13
Of the front pillar inner panel 3 is directly adhered to the inner surface of the front pillar inner panel 3. The aluminum tape 11 which is easily peeled off
Instead of relying on b (because the adhesive strength is weak), the soft foam sheet 11 can be attached by utilizing the characteristics of the flexible foam material having high adhesive strength.

Before the front pillars 2 of the vehicle body 1 are assembled, each clip hole 6 is formed in the inner surface of the front pillar inner panel 3 constituting the front pillar 2 as shown in FIG. To close with
The soft foam sheet 11 with the aluminum tape is attached (by the adhesive force provided by the soft foam material itself). As a result, the flexible foam sheet 11 is attached to the panel surface around the clip hole 6 so as to cover the opening of the clip hole 6 without directly touching the opening edge of the clip hole 6.

Further, a thermosetting foam sheet 10 is attached to each side surface of the front pillar outer panel 4. At this time, the size of each thermosetting foam sheet 10 is
This is a size necessary for foaming and filling a closed sectional space formed by the front pillar inner panel 3, the front pillar outer panel panel 4, and the side outer panel 5.

In the vehicle body assembling process, as shown in FIG. 3C, the front pillar inner panel 3 with the soft foam sheet 11, the front pillar outer panel 4 with the thermosetting foam sheet 10, and the side outer panel 5 And the front pillar 2 is assembled by welding. Then, both foam sheets 10 and 11 are installed in the closed cross-section formed by each panel 3-5.

When the assembly of the vehicle body 1 is completed, the vehicle body 1 is led to an electrodeposition process, and an electrodeposition coating is applied to the surface of the vehicle body 1.
Subsequently, the vehicle body 1 that has completed the coating is led to a baking coating process, in which the coating is dried by heating at a high temperature and baked.

The heat of the baking causes the thermosetting foam sheet 10 and the soft foam sheet 11 to react.

Here, the flexible foam sheet 11 reacts faster than the thermosetting foam sheet 10, and as shown by the two-dot chain line in FIG. The foam sheet 11 foams to form a soft layer continuous with the attachment hole 6, that is, a soft foam layer P, on the back surface side of the clip hole 6.

At this time, since the opening edge of the clip hole 6 is covered with the aluminum tape 13, the soft foam sheet 1
1 foams without adhering to the opening edge of the clip hole 6. In other words, the soft foam layer P is formed without adhesion at the opening edge of the clip hole 6 which is a factor that hinders insertion of the clip 8. Since the opening of the clip hole 6 is closed by the aluminum tape 13, it is possible to prevent the soft foam layer P from jumping out of the clip hole 6 to the outside.

Thereafter, the thermosetting foam sheet 10 foams, fills the remaining closed space of the center pillar 2 as shown in FIG. 2, and cures.

At this time, the foamed thermosetting foam sheet 1
0 foam-fills the space around the previously formed soft foam layer P, so that the inside of the front pillar 2 is foam-hardened while maintaining the state where the clip 8 can be inserted from the clip hole 8. Thus, the center pillar 2 is reinforced and vibration is suppressed.

Thereafter, an outfitting process is started, and an operation of attaching the harness clip 8 to each clip hole 6 of the center pillar 2 is performed as shown in FIG. The situation when the harness clip 8 is attached to the center pillar 2 is shown in FIG.
(A) to (c) are shown enlarged.

Here, as shown in FIG. 2, the harness clip 8 has, for example, a holding portion 8c for holding the harness 7 on one side of the plate portion 8b and, for example, a split conical portion on the other side. It is a component configured to have the claw portion 8a formed by. That is, the claw portion 8a of the harness clip 8
When inserted into the clip hole 6, the claw 8 a is elastically displaced in the radial direction, fits into the clip hole 6, and is locked at the opening edge of the hole 6.

By inserting the claw 8a of the harness clip 8 into the clip hole 6 closed with the aluminum tape 13, the harness clip 8 is securely fixed to the front pillar 2.

To explain this point, the aluminum tape 13 interposed between the soft foam layer P and the clip hole 6 (the opening of the hole and the edge of the opening) has a small adhesive force. Further, since the soft foam layer P is soft, when the claw 8a of the clip 8 for fixing the harness 7 is inserted through the clip hole 6,
As shown in FIGS. 4A to 4C, the aluminum tape 13 is used.
Is pressed by the tip of the claw portion 8a and is peeled off from the inner surface of the front pillar inner panel 3. Then, the claw portion 8a to be inserted pushes back the aluminum tape 13 while squeezing in the clip hole 6, and moves the foam layer P to the back side of the soft foam layer P.
Proceed while transforming.

As a result of the pushing, the peeling of the aluminum tape 13 proceeds, and the opening edge of the clip hole 6 is exposed as shown in FIG.

When the claw 8a passes through the clip hole 6, the claw 8a is elastically restored as shown in FIG. 4 (c), and the claw 8a fits into the clip hole 6 and the base end of the claw 8a. However, the harness clip 8 is engaged with and fixed to the front pillar 2 by engaging with the opening edge of the exposed clip hole 6.

At this time, the claw 8a of the harness clip 8
And the opening edge of the clip hole 6 are directly formed without the foam member entering between them, as described in the section of the prior art.
Since they are locked, complete engagement between them is achieved. A harness 7 is attached to the harness clip 8, and a front pillar trim 14 is attached to the center pillar 2 (FIG. 2).
Only shown).

Accordingly, the sheet member for covering the opening of the clip hole 6 and the edge of the opening, that is, the aluminum tape 1
The use of a flexible foamed base material employing 3 and the use of a component mounting structure employing the same aluminum tape 13 allows the claw portion 8 to be formed.
Inconveniences such as insufficient hooking margin of a and slipping of the claw portion 8a are solved, and the harness clip 8 can be securely locked in the clip hole 6. Moreover, since the claw portion 8 is directly hooked on the opening edge of the clip hole 6, the sense of moderation when the claw portion 8 is fixed to the clip hole 6 is clear, and the assembling workability is excellent. .

In addition, the flexible foam sheet 10 employs a structure in which the base portion 11a to be foamed projects from around the aluminum tape 13, and the projecting portion 11b is directly adhered to the inner surface of the front pillar inner panel 3. Because it is attached, it can be firmly attached to the front pillar inner panel 3 with the strong adhesive force of the soft foam member, even if the front pillar inner panel 3 is subjected to an impact when welding to another member. Even in such a case, there is no need to worry about the soft foam sheet 10 falling off, so that the foam filling operation can be performed with confidence.

FIG. 5 shows a second embodiment of the present invention, and FIG. 6 shows a third embodiment of the present invention.

Each embodiment shows a different way of assembling the aluminum tape 13.

Specifically, in the second embodiment shown in FIG. 5, for example, an aluminum tape 13 having an outer shape larger than the sheet-shaped base portion 11a is attached to the inner surface of the front pillar inner panel 3 to form a clip hole. After covering the opening and the opening edge of the aluminum tape 6, the sheet-like base portion 11a is attached to the side surface of the remaining aluminum tape 13.

In the second embodiment shown in FIG. 6, an aluminum tape 13 having the same outer shape is attached to a sheet-like base portion 11a, and then the aluminum tape 13 is attached to the inner surface of the front pillar inner panel 3. This is a structure that covers the opening of the clip hole 6 and the edge of the opening.

In this case, the same effects as in the first embodiment can be obtained. In FIGS. 5 and 6, the first
The same reference numerals are given to the same portions as those of the embodiment, and the description is omitted.

The present invention is not limited to the above-described embodiment, but may be implemented with various modifications without departing from the gist of the present invention. For example, in the above-described embodiment, the present invention is applied to the front pillar. However, the present invention is not limited to this, and may be applied to a skeletal member having another mounting hole of the vehicle body (for example, a center pillar, a rear pillar, a side sill, a side frame, and the like). Good. Furthermore, although aluminum tape was adopted as the sheet member, the present invention is not limited to this, and other sheet members may be used. Moreover, a sheet member without an adhesive surface may be sufficient (in the case of the first embodiment). In the embodiment,
Although a clip hole into which a clip is inserted is applied as the attachment hole, an attachment hole into which another engagement portion is inserted, such as an engagement portion of a trim member, may be used. If the present embodiment is applied to the case where the locking portion of the trim member is locked in the clip hole c, the locking portion of the trim member is located behind the trim member, so that the mounting operator can use the trim member. It is difficult to directly and visually align the locking portion of the trim member and the clip hole c, and the installation worker feels that the locking portion of the trim member is aligned with the clip hole c by groping. However, when the foamed hard portion b bulges out of the clip hole c as shown in FIG. 7B, the user feels that the locking portion of the trim member is aligned with the clip hole c. It is possible to prevent the foamed hard portion d from swelling out of the clip hole c, thereby making sure that the locking portion of the trim member is aligned with the clip hole c. Feel by feeling It becomes possible way.

Further, in the present embodiment, the thermosetting foam sheet 10 is used to foam-fill a closed sectional space formed by the front pillar inner panel 3, the front pillar outer panel 4, and the side outer panel 5. However, in place of the thermosetting foam sheet 10, a material that produces a foaming effect by mixing two liquids may be used.

[0051]

According to the first and third aspects of the present invention, as described above.
According to the invention described in the invention described in the above, if the locking tool is inserted into the foamed soft foamed member from the mounting hole, both the locking tool and the opening edge of the mounting hole, the soft foamed member between them Are directly locked without any trouble such that the two enter.

Therefore, the locking tool can be securely locked to the mounting hole, and it is possible to prevent a situation in which the locking tool is accidentally detached from the mounting hole.

According to the second aspect of the present invention, in addition to the above effects, the flexible foamed base material with the sheet member can be firmly attached to the structural material by the strong adhesive force of the flexible foamed base material itself. Even if an impact is applied, there is an effect that there is no fear that the soft foamed base material will fall off.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of a vehicle body in which a front pillar is foam-filled according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the front pillar along the line AA in FIG.

FIG. 3 is a diagram illustrating a procedure for foaming a soft foamed member and a hard foamed member inside a center pillar.

FIG. 4 is a cross-sectional view for explaining until the claw portion of the clip engages with the opening edge of the mounting hole exposed by the sheet member pushed away by the insertion of the clip.

FIG. 5 is a sectional view for explaining a main part of a second embodiment of the present invention.

FIG. 6 is a sectional view for explaining a main part of a third embodiment of the present invention.

FIG. 7 is a sectional view for explaining a technique of reinforcing a structural member by foam filling.

FIG. 8 is a cross-sectional view for explaining a technique of foam filling in which a clip can be inserted from a mounting hole.

FIG. 9 is a cross-sectional view for explaining that the clip is easily pulled out by the foam filling.

[Explanation of symbols]

 2: Front pillar (structural member) 3: Front pillar inner panel 6: Clip hole (mounting hole) 7: Harness 8: Harness clip (locking tool) 8a: Claw portion 10: Thermosetting foam sheet (foam filler) 11: Soft foam sheet (soft foam base) 11b: Overhanging part 13: Aluminum tape (sheet member).

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Sadahiro Terada 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation F-term (reference) 3D003 AA01 AA10 BB02 CA33

Claims (3)

[Claims] 1. A mounting member having a mounting hole into which a locking member can be inserted, the mounting member being mounted on an inner surface of the structural member having a closed cross section so as to close the mounting hole, foaming by heat applied from the outside, and being mounted in the closed cross section. A flexible foam base material that forms a region that allows insertion of the locking tool from a hole, wherein the soft foam base material has an opening of the mounting hole and a portion of the base material facing the mounting hole. A flexible foamed member provided with a sheet member that covers an opening edge. 2. The flexible foam base material is formed in an outer shape projecting from around the sheet member, and the projecting portion is directly attached to an inner surface of the structural member. The flexible foamed member according to claim 1. 3. The mounting member is mounted on an inner surface of a structural member having a closed cross section having a mounting hole into which a stopper can be inserted, so as to close the mounting hole, foams by heat applied from the outside, and is mounted in the closed cross section. A flexible foam base material that forms a region that allows insertion from the hole, and a sheet member that is interposed between the flexible foam base material and the mounting hole, and covers an opening of the mounting hole and an edge of the opening. When the locking member is inserted from the mounting hole, the sheet member is pushed away by the locking member to expose an opening edge of the mounting hole, and the locking member and the opening edge are separated from each other. A component mounting structure characterized by being directly locked.