DESIGNWORKS Vol.22

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Topic富岡八幡宮 例大祭御観覧所/東北の木材を利用した仮設観覧席と休憩所Tomioka Hachimangu / Temporary viewing stand and rest house built using Tohoku wood2012年の8月、江戸三大祭りの一つである深川八幡祭りが開催された。3年に1度の例大祭が震災で延期になり、今回は東日本大震災早期復興祈願祭りとして行われた。天皇皇后両陛下は、当日、空襲体験者とご懇談の後、永代通りに連なる神輿連合渡行を御観覧所からご覧になられた。粋な江戸の祭りにふさわしく、柱を両側から挟みこむ挟梁を桁行梁間方向にかけ、根太・床・梁・母屋と部材そのものを積み重ねただけの素朴な木造の御観覧所とした。施工期間が8日間と短かいため、仕口はボルト接合とし、観覧席が明るくなるよう、屋根はテントとした。また復興祈願祭ということで、柱は福島県東白川郡産、壁と床の構造用合板は被災し早期に復興した石巻合板工業という東北の材料を使用した。行幸啓の記憶を残したいという想いから、2階部分を平屋の休憩所として境内に再建した。手すりの支柱と笠木は三角形に加工し、根太と組合わせて壁の仕上げとした。また、1階の梁は休憩所に置くベンチに加工し、1階の柱は記念品のペントレーとして、余すところなく再利用した。本殿を眺められる絶好の場所で、復興と深川の繁栄を見守るかのように静かに佇んでいる。(秋山 裕子)In August 2012, the Fukagawa Hachiman Festival, one of the three major festivals of ancient Edo, was held. Regularly held once every three years, the festival was postponed due to the Great East Japan Earthquake of 2011, and this time it was held as a festival to pray for a rapid recovery from the disaster. The Emperor and Empress attended the festival and viewed the mikoshi (portable shrine) procession stretching along Eitai-dori from a viewing stand. The viewing stand, constructed of simple wood, was designed to be appropriate for a sophisticated Edo festival. The surrounding beams on both sides of the columns were placed in the ridge span direction, forming a foundation for the members placed on top (floor joists, floor, beams and roof purlin). As the construction had to be completed in a mere eight days, the joints were bolted together, and a tent roof was used to ensure a bright interior for the viewing stand. Because the festival was held to pray for disaster reconstruction, columns from Higashishirakawa-gun in Fukushima Prefecture were used, and materials from the Ishinomaki plywood industry that had managed a rapid recovery were used as the structural plywood for the walls and floor. To commemorate the visit of the Imperial couple, the second story section was reconstructed on the grounds as a single-story rest house. The handrail supports and coping were fashioned into a triangular shape and combined with the floor joints to finish the walls. In addition, the first floor beams were made into benches to be placed in the rest house, and the first floor columns were fashioned into pen trays for distribution as commemorative souvenirs. In this way, every part of the structure was preserved or reused. The rest house affords an excellent view of the main hall, and it stands silently as if watching over the reconstruction progress and the prosperity of Fukagawa.(Yuko Akiyama)建築主:富岡八幡宮所在地:東京都江東区主要用途:観覧席設計施工:竹中工務店・設計:水野吉樹・秋山裕子・構造:麻生直木・花井厚周・作業所長:佐久間徹29仮設の御観覧所30観覧席例大祭当日Topic28