VEHICULAR BACK DOOR

• Main Authors: YAMASHITA JUNICHIRO, YOSHIMATA KEIJI
• Format: Patent
• Language: English; Japanese
• Published: 03.06.2021
• Subjects: PERFORMING OPERATIONS; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FORVEHICLES; TRANSPORTING; VEHICLES IN GENERAL; WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILARDEVICES FOR VEHICLES

To inhibit muffled sound occurring in an internal space of a vehicular back door from being transmitted into a passenger compartment.SOLUTION: A vehicular back door 1 is formed by coupling an inner panel 10 and an outer panel 20 to form an internal space 30. The internal space 30 has: a large space part 31 having a relatively large length as seen in a vehicle fore-and-aft direction; and small space parts 32, 33 which are provided adjacent to the large space part 31 and have relatively small lengths as seen in the vehicle fore-and-aft direction. Partition wall ribs 40, 41 partitioning the large space part 31 from the small space parts 32, 33 are formed on an inner surface, facing the internal space 30, of one 10 of the inner panel 10 and the outer panel 20. Gaps 42, 43 are respectively formed between tips of the partition ribs 40, 41 and the other 20 of the inner panel 10 and the outer panel 20. A first soundproof material 50 is sandwiched between the gaps 42, 43.SELECTED DRAWING: Figure 3 【課題】車両用バックドアの内部空間で発生したこもり音が車室内に透過するのを抑制する。【解決手段】車両用バックドア１は、インナパネル１０とアウタパネル２０とが内部空間３０を有するように結合してなる。内部空間３０は、車両前後方向の長さが相対的に大きい大空間部３１と、大空間部３１に隣接するように設けられ、車両前後方向の長さが相対的に小さい小空間部３２，３３とを有している。インナパネル１０及びアウタパネル２０の一方１０における内部空間３０に臨む内面には、大空間部３１と小空間部３２，３３との間を隔てる隔壁リブ４０，４１が形成されている。隔壁リブ４０，４１の先端と、インナパネル１０及びアウタパネル２０の他方２０との間には隙間４２，４３が形成されている。隙間４２，４３には第１防音材５０が挟まっている。【選択図】図３