PROBLEM TO BE SOLVED: To provide a soundproof structure of an automobile in which deformation of a sound absorption material around mounting holes due to the lapse of time is suppressed.SOLUTION: A soundproof structure of an automobile comprises a panel 5 for separating the inside and outside of a cabin, and a sound absorption material 1 mounted to the panel 5 in a state of being stretched. The sound absorption material 1 is a substantially rectangle and made of a soft resin foam body having an elongation percentage of 10% or more. First mounting holes 2 are provided respectively at corner parts located at both ends of a side 21 on the vertically upper side of the sound absorption material 1. The lower part of the sound absorption material 1 in a vertical direction is fixed to the panel 5 by fixing parts 10. First engaging projections 6 engaged with the first mounting holes 2 are provided in the panel 5. The first mounting holes 2 and the first engaging projections 6 are engaged in a state in which the sound absorption material 1 is stretched so as to increase the elongation percentage from a side 22 on the vertically lower side toward the side 21 on the vertically upper side.
【課題】吸音材の、経時による取付孔まわりの変形が抑制された自動車用防音構造を提供する。【解決手段】本発明の自動車用防音構造は、車室内外を隔てるパネル5とパネル5に引き伸ばされた状態で取付けられている吸音材1とを有する。吸音材1は、略長方形であり、伸び率が10%以上の軟質樹脂発泡体からなる。吸音材1の鉛直上方の辺21の両端に位置する角部にはそれぞれ第1の取付孔2が設けられている。吸音材1の鉛直方向下部は、固定部10によってパネル5に固定されている。パネル5には、第1の取付孔2と係合する第1の係合突起6が設けられている。吸音材1が鉛直下方の辺22から鉛直上方の辺21に向かって伸び率が大きくなるように引き伸ばされた状態で、第1の取付孔2と第1の係合突起6とが係合している。【選択図】図1
SOUNDPROOF STRUCTURE OF AUTOMOBILE
自動車用防音構造
2015-11-24
Patent
Electronic Resource
Japanese
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