| 摘要 |
PURPOSE:To reduce noise in a non-metallic antiskid device by forming net with different kinds of mesh patterns. CONSTITUTION:Plural single bodies of net-shaped pieces 10A, 10B are prepared beforehand through a press-forming process and interconnected by means of connection metal members 11 so that the net 2 of an antiskid device is obtained. In this case, PA or PB is designated as the length of each single body 10A or 10B and used as the pitch of a mesh pattern. These pitches are then combined in a pitch arrangement of PA-PA-PB-PB. Further within each pitch PA or PB each mesh is arranged symmetrically right and left interposing a pitch center line L, namely it is set in the form of PA1=PA2 and PB1=PB2. It is thus possible to reduce a running sound.
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