JPH042424B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) This invention provides a composite resin molded panel with a
This invention relates to improvements in fixing structures for fixing separate members such as mounting brackets and moldings.

(Prior art and its problems) As is well known, various interior materials are installed inside the interior of an automobile, and these interior materials are designed with consideration given to cost efficiency and the fact that they can be easily molded into a desired shape. Therefore, there is a tendency to increasingly use composite resin materials, which are general-purpose synthetic resins mixed with fillers such as board scraps.

For example, the interior material 1 shown in FIG. 5 can be obtained by mixing and stirring polypropylene resin and board scraps, extruding them into sheets using an extrusion molding machine, heating and softening these sheets, and then cold pressing them into a desired shape. The core material 2 is made of a molded panel, and a skin material 3 such as carpet or nonwoven fabric is integrally adhered to the surface of the core material 2 during the press molding.

Separate members 4 such as mounting brackets and decorative moldings are attached to appropriate locations on these interior materials 1, but the fixing structure of these separate members 4 is on the back side of the core material 2, as shown in FIG. Boss 5 at appropriate height
A mounting hole 6 is provided in the center of the boss 5.
By screwing the screw 7 inside the separate member 4
We are trying to fix it.

In this way, in the past, in order to ensure the effective thread size of the screw 7, the thickness of the core material 2 could not be set thick (if it was set thick, the weight would increase considerably and the weight reduction of the part would be impaired). In this way, a structure is adopted in which the boss 5 protrudes by a predetermined height.

Therefore, if there is not enough clearance between these interior materials 1 and the mounting side parts, the protrusions of the bosses 5 of these interior materials will get in the way, and the interior materials 1
cannot be set, it is necessary to change the shape of the mating part to a shape that escapes these convex parts, and these shape changes lead to increased costs, so in reality there is plenty of space between the mating part and the mounting part. The reality is that it can only be applied to certain areas, greatly limiting the scope of application of the interior material 1.

Furthermore, in the fixing structure using the screws 7, the screws 7 just dig into the interior of the core material 2, which is softer than metal, so strong joint strength cannot necessarily be obtained, and over a long period of time, the Considering that the bonding strength weakens due to vibrations inside,
It cannot necessarily be said that the structure is such that the separate member 4 such as the mounting bracket can be securely fixed for a long period of time.

(Object of the Invention) This invention was made in view of the above-mentioned circumstances, and the object of the present invention is to eliminate the conventional mounting boss in a fixing structure of a separate member attached to a composite resin molded panel, To provide a structure for fixing a separate member in which a composite resin molded panel is kept in a flat state, does not interfere with the mating part, and has significantly improved mounting strength.

(Structure and Effects of the Invention) In order to achieve the above object, the present invention performs press molding on a composite resin plate to obtain a composite resin molded panel of a desired shape, and at the time of the press molding,
By inserting an undercut-shaped female caulking member made of a metal material with its opening facing toward the back side of the molded panel, an undercut-shaped recess regulated by the female caulking member is formed on the back side of the composite resin molded panel. By forming and molding, and joining a separate member to a predetermined portion on the back side of the panel, the male member for crimping is crimped into the recess through the attachment hole of the separate member, thereby attaching the separate member to the back side of the composite resin molded panel. It is characterized by being fixed.

That is, in the case of the fixing structure of a separate member according to the present invention, during press molding of a composite resin molded panel,
A female caulking member made of a metal material having an undercut shape is inserted into the back side of the molded panel, and this female caulking member creates an undercut shape (the diameter becomes larger toward the inner part compared to the opening). ) is formed, and a separate component is fixed by crimping the male member for crimping into this recess.As it relies on the crimping connection of metal members, it cannot be used like conventional screw fastening. It is possible to obtain reliable and firm bonding strength without the composite resin material being eaten away by the screws, and there is an effect that separate members can be reliably fixed for a long period of time.

Furthermore, unlike conventional methods, there is no need to erect a boss section to ensure the effective screw size, so there is no interference with the mating part, and it can be effectively applied to locations where there is no space between the mating part and the mating part. This has great practical value as the scope of its application has increased dramatically.

(Description of Embodiment) Hereinafter, an embodiment of the attachment structure for a separate member according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows the case where a stainless steel molding is fixed to an interior pocket installed inside a car.
A partially cutaway perspective view showing an embodiment to which the present invention is applied, and FIGS. 2 to 4 are sectional views each illustrating the process of fixing the stainless steel molding to the pocket.

In FIG. 1, a vehicle pocket 10 is composed of a core material 11 made of a molded panel formed by press-molding a composite resin plate into a desired shape, and a skin material 12 integrally adhered to the surface of this core material 11. . More specifically, the core material 11 is made by mixing and stirring polypropylene resin and board scraps at an appropriate mixing ratio, extruding them into a sheet using an extrusion molding machine, heating and softening these sheets, and molding them into a cold press mold. During the cold press molding, a decorative covering material 12 such as a carpet or non-woven fabric is integrally adhered. And these pockets 10 are interior parts 13
This pocket 10 is attached to the surface of the interior part 1.
3, a storage space 15 with an opening 14 at the top is formed, providing a pocket function.

Furthermore, in the pocket 10 of this embodiment, a decorative stainless steel molding 16 is attached along the upper edge of the pocket 10, and the upper edge of the pocket 10 is also treated. When fixing this stainless steel molding 16, a metallic female caulking member 17 having an undercut shape is inserted into the core material 11, and a recess whose outer periphery is regulated by this female caulking member 17 is used. The stainless steel molding 16 is fixed by caulking the male caulking member 19, also made of metal, into the recess 18 through the attachment hole 16a provided in the stainless steel molding 16. .

Therefore, the stainless steel molding 16 is firmly joined to the pocket 10 by the metal crimping structure of the female crimping member 17 and the male crimping member 19, and a convex portion is formed in the pocket space 15 compared to the conventional screw fastening structure. Since no space is formed, space can be used effectively.

Next, the manufacturing process of this pocket 10 will be explained based on FIGS. 2 to 4.

First, a protrusion 20a is appropriately set up at a predetermined position on the mold surface of the lower die 20 for press molding, and the female member 17 for caulking is fitted into this protrusion 20a and set. Core material 1 is heated and softened from above.
1 is placed, and a skin material 12 is further laminated from above.

Next, the upper mold 22 for press molding, which is configured to be able to move up and down by the operation of the cylinder 21, is lowered relative to the lower mold 20, and the lower mold 22 is lowered until a predetermined clearance is reached between the lower mold 20 and the upper mold 22. Perform the action. Note that the mold surface of the lower mold 20 and the mold surface of the upper mold 22 have substantially the same shape. Then, in the state shown in FIG. 3, the core material 11 is pressed, cooled and solidified, and molded along a desired mold surface shape, and the skin material 12 is integrally adhered to the core material 11. During this press molding, the caulking female member 17 is inserted into the core material 11.

After the molding is completed, the upper mold 2 is moved by the operation of the cylinder 21.
2 rises, the pocket 10 is taken out from the lower mold 20, the stainless steel molding 16 is temporarily fixed along the upper edge of the pocket 10, and the male member 19 for caulking is passed through the mounting hole 16a of the stainless steel molding 16 into the recess 18.
Complete assembly by caulking inside. Code 23 in Figure 4
indicates a caulking mold.

In the case of this embodiment, there was a relatively large storage space 15 between the pocket 10 and the mating part 13, but the effect of this embodiment is that the stainless steel molding 16 can be firmly joined, so-called metal material caulking. The purpose is to increase the strength by combining and to eliminate protrusions such as bosses on the back side of the pocket 10 to promote effective use of the pocket storage space 15.
It goes without saying that the separate member fixing structure according to the present invention is effective when attaching a separate member to a location where only a very small gap can be expected between the composite resin panel and the mating component.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional perspective view showing an embodiment in which the present invention is applied to a fixing structure of a stainless steel molding attached to a pocket, and FIGS. 2 to 4 are cross-sectional views showing the manufacturing process of a pocket to which the present invention is applied. , FIG. 5 is a sectional view showing a conventional separate member mounting structure. 10... Vehicle pocket, 11... Core material, 12
... skin material, 13 ... interior parts, 14 ... opening, 15 ... storage space, 16 ... stainless steel molding, 17 ... female member for caulking, 18 ... recess, 19 ... male member for caulking, 20... Lower mold for press molding, 20a... Protrusion, 22... Upper mold for press molding.

Claims (1)

[Claims] 1 Press-molding the composite resin plate to obtain a composite resin-molded panel of the desired shape, and at the same time, during the press-molding, a female member for caulking made of a metal material having an undercut shape is oriented with its opening toward the back side of the molded panel. By inserting the insert, an undercut-shaped recess regulated by the female member for caulking is formed on the back surface of the molded panel, and while a separate member is joined to a predetermined portion on the back surface of the molded panel, the caulking member is inserted through the attachment hole of the separate member. A structure for fixing a separate member in a composite resin molded panel, characterized in that the separate member is fixed to the back side of the molded panel by caulking the male member into the recess.