PROBLEM TO BE SOLVED: To prevent a packing from being dropped and lost while securing water-tightness between a box body and a cover in an electric connection box for a railway vehicle and to reduce a pressure that acts on the box body or the cover with thermal expansion.SOLUTION: In the electric connection box comprising a box body 41 including a sidewall part that defines an opening and the cover that covers the box body and closes the opening, a packing 15 for electric connection box is fitted into a groove which is formed on a mating surface of a sidewall part 41b or a mating surface of the cover and includes a plurality of linear parts and corner parts provided between the plurality of linear parts in a planar view. The packing comprises a reduced width part 15a and enlarged width parts 15b and 15c including protrusions 15e which protrude toward both sides of the reduced width part in a width direction. The reduced width part and the enlarged width parts are disposed alternately. A length of the reduced width part along the groove in a first area A1 including a portion to be fitted to the corner parts is shorter than a length of the reduced width part in the direction along the groove in second areas A2 and A3 more separated from the corner parts than the first area.SELECTED DRAWING: Figure 4
【課題】鉄道車両の電気接続箱において、箱本体とカバーとの間の水密性を確保しつつ、パッキンの落失を防止し、かつ、熱膨張に伴い箱本体又はカバーに作用する圧力を低減させる。【解決手段】電気接続箱用パッキン15は、開口を規定する側壁部を有する箱本体41と、箱本体を覆って開口を閉鎖するカバーとを備える電気接続箱において、側壁部41bの合わせ面又はカバーの合わせ面に形成され、平面視において、直線部と複数の直線部の間に設けられた角部とを有する溝部に嵌合される。パッキンは、縮幅部15aと、縮幅部の幅方向両側に向けて突出する突起15eを有する拡幅部15b、15cとを備え、縮幅部及び拡幅部が交互に配置され、かつ、角部に嵌合される部分を含む第1領域A1における縮幅部の溝部に沿う方向の長さは、第1領域よりも角部から離れた第2領域A2,A3における縮幅部の溝部に沿う方向の長さよりも短い。【選択図】図4
PACKING FOR ELECTRIC CONNECTION BOX FOR RAILWAY VEHICLE AND ELECTRIC CONNECTION BOX FOR RAILWAY VEHICLE
鉄道車両の電気接続箱用パッキン及び鉄道車両の電気接続箱
2016-06-20
Patent
Electronic Resource
Japanese
IPC: | H02G INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES , Verlegen oder Installieren elektrischer Kabel oder Leitungen, Verlegen oder Installieren kombinierter optischer und elektrischer Kabel oder Leitungen / B61G Kupplungen besonders ausgebildet für Eisenbahnfahrzeuge , COUPLINGS SPECIALLY ADAPTED FOR RAILWAY VEHICLES / H05K PRINTED CIRCUITS , Gedruckte Schaltungen |