| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a backrest device for a chair which clearly presents moire patterns generated by hole parts of upholstering materials back and forth while interfering with each other as patterns which are varied, profound in design, and excellent when the porous sheet-like upholstering materials are upholstered on back and forth surfaces of a backrest frame. <P>SOLUTION: Upper ends of side part frames 18, 18 facing a vertical direction in a chair are joined by an upper part frame 19 facing a horizontal direction to form a backrest frame 22 and upholster a meshed upholstering material 26 on the front surface and the back surface of the backrest frame 22. Shapes of nets 27, 28 on the back and forth both sides 26A, 26B side of the upholstering material 26 on the back and forth both surfaces of the backrest frame 22 are made the same shape and size of the nets 27, 28 differ between the front surface and the back surface of the backrest frame 22. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
