JPH0375006B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for attaching a locking member to a foam molded product, and more specifically, for example, to a method for attaching a locking member to a console box body for an automobile. The present invention relates to a method of attaching a locking member, such as a locking member, a hinge, a locking member for a glove box lid, etc., for locking the main body of an automobile interior part to other parts.

(Prior art) Conventionally, the locking member of a foam molded product has been attached by attaching it to the surface of the foam molded product with an adhesive, or for more secure attachment, it has been attached to the surface of the foam molded product using an insert of the foam molded product. A common method was to directly fix the locking member to the holder using screws or the like. Although these methods are universal and reliable, they are quite time-consuming.

Therefore, as an alternative method for attaching the locking member, a slit is made in the skin, the legs provided on the locking member are inserted into the slit, and urethane is injected into the skin and foamed to attach the locking member. A method is disclosed in Japanese Utility Model Application Publication No. 61-20761, and has achieved considerable results.

(Problems to be Solved by the Invention) However, a problem with the above-mentioned locking member attachment method is that the foam sometimes leaks from the skin slit to the skin surface of the foam molded product during molding.
This may stain the product surface. In particular, when adopting a hard urethane foam layer instead of the insert proposed in Japanese Utility Model Application Publication No. 60-17433 as the structure of the foam molded product, the foaming pressure of the hard urethane foam is equal to the foaming pressure of the semi-hard urethane foam. Since the foam is quite high compared to the surface of the skin, there is a high probability that the foam will leak out from the slits provided in the skin.

In addition, if the foam layer leaks onto the product surface, the beauty of the appearance is an important factor in determining product value for these products, so naturally the leaked urethane foam must be removed, but this work is difficult. This process requires a considerable amount of time and effort, and has disadvantages such as wasted raw materials.

Therefore, the present invention focuses on the drawbacks of the conventional technology and provides a method for attaching a locking member to a foam molded product, which is easy to work with, has sufficient strength, and does not leak from the foam molded product. With the goal.

(Means for Solving the Problems) Therefore, the features of the present invention for achieving the above-mentioned object include a skin having an opening in the locking member mounting portion and a locking member of the skin provided at the bottom of the locking portion. A seat part that matches the peripheral shape of the attachment part and a locking member having protruding legs integrally formed on the lower surface of the seat part, the legs of the locking member are inserted into the openings in the skin, and the seat part of the locking member is inserted into the opening of the skin. The present invention provides a method for attaching a locking member to a foam molded product which is set in a mold with a soft tape interposed between the surface and the surface thereof, and then foamed by injecting a synthetic resin foaming raw material into the inside of the surface.

(Function) In the method of attaching a locking member to a foam molded product of the present invention, the synthetic resin foaming material is foamed during molding, and the foaming pressure forces the soft tape interposed between the locking member and the surface of the skin from inside the skin. Due to the pushing action, the soft tape is crushed and deformed, entering the gap between the seat of the locking member and the skin, especially the gap caused by minute irregularities on the surface of the skin, and also adheres tightly to the leg of the locking member without any gaps. At the same time, it enters the gap between the opening of the skin and the leg of the locking member, completely blocking the inside and outside of the skin, thereby preventing the foam from leaking onto the skin surface.

(Example) The present invention will be further explained below by taking as an example a method of attaching a locking member to a lid of a console box for an automobile.

FIG. 1 is an overall perspective view of an automobile console box manufactured using the locking member attachment method of the present invention, and FIG. 2 is an overall perspective view of the locking member of the lid of the automobile console box shown in FIG. FIG. 3 is a partial cross-sectional view of the mold for the automobile console box shown in FIG. 1, and FIG.
- It is a partially detailed view of the A cross section.

Reference numeral 1 in FIG. 1 indicates a console box for an automobile (hereinafter referred to as console box).

To briefly explain the console box 1, it is made by laminating a foam layer of polyvinyl chloride on the back of a solid layer of polyvinyl chloride resin, and backing the back of a pre-formed skin with hard urethane foam. It is composed of a main body part 4 having a storage part 3, and a lid 5 attached to the main body part via a hinge (not shown) so that the storage part 3 of the main body part 4 can be opened and closed.

The lock that closes the storage section 3 of the main body section 4 of the lid 5 described above is the annular locking section 7 of the locking member 6 attached to the upper surface of the end opposite to the hinge attachment section of the storage section 3. This is achieved by engaging the upper edge 8 with a hook-shaped locking claw 9 provided on the lower surface of the lid 5.

Hereinafter, attachment of the locking member 6 to the main body part 4 will be explained following the molding process of the main body part 4.

The locking member 6 itself is made of a hard resin such as polypropylene or ABS resin, and its shape is such that the storage section 3 of the main body 4 is located at the bottom of the locking section 7, which has a U-shaped annular cross section on which the locking claw 9 of the lid 5 is engaged. It has a seat part 10 which is L-shaped so as to match the skin of the end part and wall part of the seat part 1.
0 has a leg part 11 vertically along the longitudinal direction with respect to the seat part 10, and the leg part 11 has three holes 12 at regular intervals in the longitudinal direction from below the center.
is provided.

Then, a section of the leg portion 11 of the locking member 6 is attached to the attachment portion of the above-mentioned locking member 6 of the skin 15 having the solid layer 18 and foam layer 14 molded in advance from vinyl chloride resin and foamed vinyl chloride resin. A rectangular opening 16 with approximately the same size and shape is provided, and the leg portion 11 of the locking member 6 is inserted into the opening 16, and the seat portion 10 of the locking member 6 is placed on the surface of the skin, with a soft tape 17 interposed therebetween. In this state, set it in the mold 18.

The soft tape 17 mentioned here is a strip of soft polyurethane foam, soft polyethylene foam, soft vinyl chloride foam, soft polypropylene foam, or soft rubber, and its thickness is uniform depending on the expansion ratio etc. Although this is not discussed, it is suitable that the thickness becomes 1 mm or less, preferably 0.5 mm or less when the thickness is reduced, and it is preferable that the thickness is usually about 1 mm to 5 mm. In addition, from the viewpoint of work efficiency, it is preferable that the soft tape has an area slightly smaller than the bottom area of the seat of the locking member, and an opening into which the leg of the locking member 6 is inserted is provided in advance. Alternatively, if a soft tape with adhesive on both sides is used, the work efficiency will be further improved. A hard urethane foam raw material is injected into the skin 15 of the mold 18 in which the surface 15 and the locking member 6 have been set as described above. The hard foamed urethane raw material foams in the mold 18, increases in volume, and strongly presses the skin 15 against the mold 18. At this time, at the attachment part of the locking member 6, the skin 15 is strongly pressed against the seat 10 of the locking member 6 by the foaming pressure of the urethane, and the skin 15 is interposed between the skin 15 and the seat 10 of the locking member 6. The soft tape 17 deforms, and the seat part 10 of the locking member 6 and the skin 1
5, and strongly presses against the leg portion 11 of the locking member 6, or alternatively, the leg portion 1 of the locking member 6
1 and the opening 16 of the skin 15 to prevent the urethane foam 19 from leaking to the surface of the skin 15.

Further, the locking member 6 has legs made of urethane foam 1.
9 and is firmly attached to the main body.
The holes 12 in the leg portions 11 of the locking member 6 have an anchoring effect to further secure the locking member 6. This hole may be a protrusion or the like.

(Effects) The method for attaching a locking member to a foamed molded product of the present invention is to set the skin and parts in a mold with a soft tape interposed between the seat of the locking member and the skin, thereby increasing the foaming pressure. During foam molding, the soft tape is subjected to strong compressive force, and the soft tape penetrates into gaps between parts and other gaps, filling the gaps and completely blocking the inside and outside of the skin. It is possible to prevent foam from leaking from the surface of the skin and produce a foam molded product with excellent surface condition, and it also omits the work of removing leaked foam after molding, which was conventionally necessary. It is possible to prevent other problems caused by leakage, such as the formation of cavities inside the molded product, and to produce a foam molded product in good condition. This has the effect of making it possible to mount the locking member firmly.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of an automobile console box manufactured using the locking member attachment method of the present invention, and FIG. 2 is an overall perspective view of the locking member of the lid of the automobile console box shown in FIG. FIG. 3 is a partial cross-sectional view of the mold for the automobile console box shown in FIG. 1, and FIG.
- It is a partially detailed view of the A cross section. 6... Locking member, 7... Locking portion, 10... Seat portion, 11... Leg portion, 15... Outer skin, 17... Soft tape, 18... Molding mold.

Claims (1)

[Claims] 1. Integrate a seat part that matches the shape of the periphery of the locking member attachment part of the skin and a protruding leg part on the lower surface of the seat with the skin provided with an opening in the locking member attachment part and the bottom of the locking part. After setting the molded locking member into the mold with the legs of the locking member inserted into the openings of the skin and a soft tape interposed between the seat of the locking member and the skin. , a method for attaching a locking member to a foamed molded product, characterized by injecting a synthetic resin foaming raw material into the skin and causing it to foam.