MOLDED ARTICLE FOR DECORATION, LIGHTING APPLIANCE FOR MOLDED ARTICLE FOR DECORATION, MANUFACTURING DEVICE OF MOLDED ARTICLE FOR DECORATION AND MANUFACTURING METHOD OF MOLDED ARTICLE FOR DECORATION

• Main Author: HIRAI MASAYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2019
• Subjects: DECORATIVE ARTS; PERFORMING OPERATIONS; SPECIAL DESIGNS OR PICTURES; TRANSPORTING

To provide a molded article for decoration or the like that shows various visual conditions depending on changes of the observation direction or the like.SOLUTION: A molded article 3 for decoration includes a base material part M having transparency, where a plurality of grooves G are aligned spaced from each other. When an observer V7 looks at the molded article 3 for decoration from the front, for example, a scene in the back can be seen-through but the grooves G are almost invisible. On the other hand, when an observer V6 looks at the molded article 3 for decoration from the oblique direction, for example, if an upper part of a groove side face F1 at the back of the front groove G of the plurality of grooves G and a lower part of a groove side face F2 of the front groove G at the back are seen contacting each other without any gap, patterns of the groove G are visible to the observer V6 but the scene in the back is hidden. To enable this, a depth de of the groove G is longer than cot [arcsin(1/n)] times of a shortest distance di between a straight line L2, which goes through the lower part of the groove side face F2 and is vertical to a surface part S, and the upper part of the groove side face F1 (n is the refraction factor of the base material part M). The molded article 3 for decoration has repeated patterns of the plurality of grooves G in this relation, thereby solving the problem mentioned above.SELECTED DRAWING: Figure 7 【課題】観察方向の変更等により多様な視覚的状態を呈する装飾用造形物他を提供する。【解決手段】装飾用造形物３において、基材部Ｍが透過性を有し、複数の溝部Ｇが互いに離れて並ぶ。観察者Ｖ７が装飾用造形物３を例えば正面から見た時、奥の風景等が透過して見え、溝部Ｇはほとんど見えない。一方、観察者Ｖ６が装飾用造形物３を例えば斜め方向から見た時、複数の溝部Ｇのうち手前の溝部Ｇの奥の溝側面Ｆ１の上部と奥の溝部Ｇの手前の溝側面Ｆ２の下部とが隙間なく接して見えれば、観察者Ｖ６に溝部Ｇの絵柄等が見え、奥の風景等は隠れる。そのためには、溝部Ｇの深さｄｅが、溝側面Ｆ２の下部を通り表面部Ｓと垂直な直線Ｌ２と溝側面Ｆ１の上部との最短距離ｄｉのｃｏｔ［ａｒｃｓｉｎ（１／ｎ）］倍より大きければよい（ｎは基材部Ｍの屈折率）。このような関係にある複数の溝部Ｇの繰り返しパターンを有する装飾用造形物３により、上記課題が解決される。【選択図】図７