JP2008012871A - Fold panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein when a hinge part is needed for an intermediate part of a fold panel with a skin manufactured by the blow molding of a thermoplastic resin, the hinge part must be molded thinly, the level difference generated by the back channel projection in the crossing position between the peripheral channel for a grain lump and this hinge part achieves the duty of a rib, thereby causing the increase of the second moment of area of the bending direction of this hinge part, and spoiling the flexibility of this hinge part remarkably. <P>SOLUTION: The peripheral channel prepared in the surface, the skin in which the edge is inserted by this peripheral channel, the hinge part for folding up, and the incised portion in the back channel projection in the crossing position between this peripheral channel and this hinge part are prepared, thereby the above-mentioned problem has been solved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a folding panel with a skin manufactured by blow molding a thermoplastic resin.

1 shows a conventional folding panel with a skin, FIG. 2 shows a cross section AA in FIG. 1, and FIG. 3 shows a cross section BB in FIG.

Conventionally, when the folding panel 1 with the skin 2 attached as shown in FIGS. 1 to 3 is manufactured by blow molding, there is a technique called “graining” as a method of attaching the skin 2 with a good appearance. This is known as disclosed in Patent Document 1 as a method of concealing the edge of the skin 2 by fitting it into the circumferential groove 3 on the surface of the folding panel 1.
JP-A-2005-280250

However, when the hinge part 4 is required at the intermediate part of the folding panel 1, the hinge part 4 has to be formed thin. However, as shown in FIG. 2, the circumferential groove 3 and the hinge part 4 Since the step generated by the groove-back convex portion 6 at the position where the two intersect each other acts as a rib, the bending moment of the hinge portion 4 is significantly impaired due to an increase in the second moment of section in the bending direction of the hinge portion 4. .

The problem to be solved is that when a hinge part is required in the middle part of the folding panel with skin, the hinge part must be thinly formed, but the peripheral groove for wood grain crossing the hinge part The level difference caused by the groove back convex portion at the position plays the role of a rib, so that the second moment of the section in the bending direction of the hinge portion is increased, and the flexibility of the hinge portion is remarkably impaired. The present invention has been made to solve the above-described points.

The present invention relates to a folding panel manufactured by blow molding a thermoplastic resin, a circumferential groove provided on the surface, a skin fitted with an edge in the circumferential groove, a hinge part for folding, The most important feature is that a notch is provided in the groove back convex portion at a position where the circumferential groove and the hinge portion intersect.

According to the present invention, the hinge portion having the step formed by the groove back convex portion at the position where the circumferential groove and the hinge portion intersect with each other is reduced or eliminated by the cut portion. There is an advantage that it is possible to obtain a foldable panel with an excellent skin without damaging it.

For the purpose of obtaining a foldable panel with a good skin without impairing the flexibility of the hinge part, a circumferential groove provided on the surface, a skin with an edge fitted in the circumferential groove, and a hinge for folding This is realized without impairing the economic efficiency of blow molding by providing a notch in the groove back convex portion at a position where the portion, the circumferential groove and the hinge portion intersect.

The configuration of the present invention will be described based on the embodiments of the invention as follows. In addition, the same code | symbol as a prior art example represents the same member.

4 and 5 show an embodiment of the present invention, which corresponds to the AA cross section of FIG. As shown in FIG. 4, the hinge part 4 is first set thin on a blow molding die (not shown) so as to avoid the circumferential groove 3.

Next, the end edge of the skin 2 made of nonwoven fabric, woven fabric, knitted fabric, leather or the like is set at a predetermined position of the mold corresponding to the position of the peripheral groove 3, and a half of polypropylene or the like is placed in the mold. A molten thermoplastic resin parison (not shown) is extruded and blow molded.

The thermoplastic resin is not limited to polypropylene, but polyethylene, other polyolefin resins, polyester resins such as PET resins and PBT resins, polyamide resins, polyacetal resins, syndiotactic polystyrene, polystyrene, rubber-modified polystyrene, Any resin that can be blow molded, such as a styrene-acrylonitrile copolymer, an ABS resin, a modified PPO resin, a PPS resin, a polycarbonate resin, and a thermoplastic elastomer, may be used.

In this state, the bending moment in the bending direction of the hinge portion 4 is large due to the step of the groove back convex portion 6 at the position where the circumferential groove 3 and the hinge portion 4 intersect, and the flexibility is still low. There is.

After molding, the groove back convex portion 6 is passed to the cut line 11 shown in FIG. 4, and the cut portion 12 as shown in FIGS. 5 and 6 is secondarily processed. 6 corresponds to the BB cross section of FIG.

As the processing method of the cut portion 12, it may be cut with a rotary blade such as a metal saw, ground with a router or grinder, or may be processed with a tool such as a cutting tool, a cutter, a saw, or a nipper. .

Alternatively, as another processing method of the cut portion 12, the groove back convex portion 6 is melted and deformed by a heating device such as a heating blade device, an ultrasonic device, or a laser beam device, and the resulting shape is obtained as the cut portion. 12 may be embodied.

Alternatively, as another processing method of the cut portion 12, the groove back convex portion 6 may be crushed by a hot press, a room temperature press or the like, and the resulting shape may be embodied as the cut portion 12.

FIG. 7 shows a state in which the folding panel 1 according to the present invention is folded. The cross-sectional secondary moment in the bending direction of the hinge portion 4 is drastically reduced by the removal of the groove back convex portion 6, and the flexibility of the hinge portion 4 is remarkably improved as compared with that before cutting.

In the above-described embodiment, an example in which the groove back convex portion 6 is gotten while the folding panel 1 is opened is shown. However, the groove back convex portion 6 may be gotten while the folding panel 1 is folded. .

Further, the groove back convex portion 6 may be removed so as to be removed.

FIG. 8 is a partially enlarged perspective view of the folding panel 1 showing another embodiment. After the folding panel 1 is formed, the cut portion 12 is secondarily processed in the groove back convex portion 6. 3 is completely cut by the notch 12.

The cutting portion 12 can be processed by cutting with a rotating blade such as a metal saw, punching with a punch, etc., fusing with a heating device such as a heating blade device, ultrasonic device, laser beam device, etc. Alternatively, it may be cut into a slit shape using a cutting blade or the like.

FIG. 9 shows a cross-sectional view of the cut portion 12. 9 corresponds to the AA cross section of FIG. In the drawing, the circumferential groove 3 is completely cut by the notch 12.

The width of the cut portion 12 may be wide or narrow, can be freely selected by aesthetic judgment or the like, and may be cut very narrowly so as not to stand out as necessary.

Further, the cut portion 12 may be cut so as to reach the end of the hinge portion 4 or may be cut so as to leave the end of the hinge portion 4.

As described above, according to the present invention as shown in both the embodiments, the hinge portion 4 having a step formed by the groove back convex portion 6 at the position where the circumferential groove 3 and the hinge portion 4 intersect with each other is formed by the cut portion 12. Since it is alleviated or eliminated, it is possible to obtain a foldable panel with a good appearance without impairing the flexibility of the hinge portion 4.

INDUSTRIAL APPLICABILITY The present invention can be used for a folding panel with a skin such as an automobile deck board manufactured by blow molding a thermoplastic resin.

A perspective view of a conventional folding panel with a skin AA sectional view of FIG. BB sectional view of FIG. AA sectional view before secondary processing according to the present invention AA sectional view after secondary processing according to the present invention BB sectional view after secondary processing according to the present invention The side view which represented notionally the state which folded the folding panel based on this invention Partial perspective view of another embodiment according to the present invention AA sectional view of another embodiment according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Folding panel 2 Skin 3 Circumferential groove 4 Hinge part 6 Groove back convex part 11 Cut line 12 Notch part

Claims (3)

A folding panel manufactured by blow molding a thermoplastic resin, a circumferential groove provided on the surface, a skin having an edge fitted in the circumferential groove, a hinge portion for folding, and the circumferential groove A folding panel characterized in that a notch is provided in the groove back convex portion at a position where the hinge portion intersects the hinge portion. 2. The folding panel according to claim 1, wherein the cut-out portion is in a form that is removed. The folding panel according to claim 1, wherein the cut portion penetrates up to the front and back of the hinge portion.