JP3337839B2 - Foam resin filling board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board in which a foamed resin is injected and foamed into a hollow thin box-shaped case formed by closing front and back panels of a metal plate and closing an end thereof.

[0002]

2. Description of the Related Art A lightweight, heat-insulating and sound-insulating board has been conventionally formed by injecting a foaming resin into a hollow thin box-shaped case and foaming it.

For example, in Japanese Patent Application Laid-Open No. 55-109635, a side plate 3 is inserted between the edges of thin metal plate panels 1 and 2 as shown in FIG. 2 is described, forming a hollow thin box-shaped case, injecting a foamed resin 6 into the case, and foaming to form a board 7.

In Japanese Utility Model Laid-Open Publication No. 3-36826, as shown in FIG. 5, foamed resin 6 is placed in a hollow box-shaped case having side panels 3 'attached to the ends of front and rear panels 1 and 2. Is described, and the board 7 is formed by foam filling.

[0005]

Since such a conventional foamed resin-filled board has a complicated structure for combining the front and back panels constituting the outer surface of the board, the present invention makes it easy to combine the front and back panels. The purpose of the present invention is to obtain a foamed resin-filled board capable of performing the following.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a side edge of a front panel is folded up, its end is turned over, a groove having a U-shaped cross section is formed inside the end, and a side edge of a back panel is folded. A vertical V-shaped groove is formed on the inside thereof, and the two grooves are fitted together while the edge of the V-shaped groove elastically contacts the inner surface of the U-shaped groove to join the front and back panels. Is filled with a foamed resin.

[0007]

When the back panel is placed on the front panel and pushed, the V-shaped groove enters the U-shaped groove with its edge elastically contacting the inner surface of the U-shaped groove. This state is stably maintained by friction between the edge of the V-shaped groove and the inner surface of the U-shaped groove. Therefore, a thin hollow case is formed by closing the open ends of both panels, and a foamed resin is injected into this case. Since the foamed resin does not reach the bottom of the U-shaped groove because the edge of the V-shaped groove elastically contacts the inner surface of the U-shaped groove, the resin leaked from this portion is also blocked from flowing at the plane contact portion of the folded edge, The resin does not leak from between the front and back panels.

[0008]

1 to 3 show an embodiment of a foamed resin-filled panel according to the present invention. FIG. 1 is an exploded perspective view, and FIG.
A sectional view and FIG. 3 are BB sectional views.

The back panel 8 is formed by bending both side edges thereof at right angles toward the front panel 9 to form a folded edge 10, and bending the end thereof inwardly into a V-shape to form a V-shaped groove 11. .

The front panel 9 is also formed by bending both side edges thereof at right angles toward the back panel 8 to form a folded edge 12. The tip of the folded edge is folded 180 ° and a U-shaped groove 13 is formed at the inner end. Has formed.

In order to form a board by combining the front and back panels 8 and 9, a double-sided adhesive tape 14 is applied to both ends of the front panel 9, and a closing plate 15 of an aluminum mold material is placed thereon and temporarily joined (see FIG. 1). Shows this configuration only at one end), and presses the back panel 8 toward the front panel. As a result, the V-shaped groove 11 fits into the U-shaped groove 13, and the upper surface of the closing plate 15 contacts the inner surface of the back panel. In this way, the foamable urethane resin is injected into the space surrounded by the front and back panels 8, 9 and the closing plate 15, and is foamed and solidified. As a result, the front and back panels 8, 9 and the closing plate 15 are bonded and bonded to form a foam resin-filled board.

When the back panel 8 is pressed into the front panel 9, V
The end of the groove 11 slides while elastically contacting the inner surface of the U-shaped groove 13 and enters the U-shaped groove 13. Due to the friction between the two, the connected state is maintained even if the pressing is stopped. When the foamed resin is injected, the elastic contact prevents the resin from leaking to the bottom of the U-shaped groove. Further, the folded edge 10 of the back panel 8 is
Abuts on the folded portion of the folded edge 12 as a flat surface, so that even if the resin leaks from the end of the V-shaped groove 11, the leak can be completely prevented by the flat surface.

[0013]

According to the present invention, it is easy to form a folded edge, a V-shaped groove, and a U-shaped groove on the edge of the front and back panels.
If brought into engagement with the shaped groove and U-shaped grooves, the panels are provisionally assembled state of the inseparable due to frictional force acting on the groove, while preventing leakage of resin when injecting a foaming resin in this state foam Can be filled with resin. Therefore, a foamed resin-filled board can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA when the front and back panels are combined.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view of a panel end showing a conventional example.

FIG. 5 is a cross-sectional view of a panel end showing another conventional example.

DESCRIPTION OF SYMBOLS 1, 2 Panel 3, 3 'side plate 4 Holding piece 5 Screw 6 Foam resin 7 Board 8 Back panel 9 Front panel 10 Folding edge 11 V-shaped groove 12 Folding edge 13 U-shaped groove 14 Double-sided adhesive tape 15 Closure Board

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 E04C 2/00-2/54 E04F 13/00-13/18

Claims (1)

(57) [Claims] An end of a foldable edge (12) formed by folding a side edge of a front panel (9) is folded back, and a U-shaped groove (13) is further formed inside the end to form a back panel (9). The V-shaped groove (1) is provided inside the end of the folded edge (10) formed by folding the side edge of (8).
1) is formed, and the edge of the V-shaped groove (11) is elastically contacted with the inner surface of the U-shaped groove (13), and the folded edge (10) of the back panel (8) is folded into the folded edge of the front panel (9). A foam resin-filled board formed by joining both panels (8) and (9) by making surface contact with the folded portion of (12), and filling and foaming the foam resin in both panels with the ends of both panels closed. .