（解説文要約）
坑道が分岐する場所に作られる木枠をカグメ枠と呼んでいました。
太い親枠の上にハリを乗せ、片方のみ枠足を作ります。
カグメ枠を作るには熟練した技術が必要ですが、この枠を作れるほどの達人が、
どこの炭坑にも一人ぐらいはいたそうです。
Where mine drives branched off, wooden frames called "Kagume-waku" were installed.
One end of the beam was inserted over the thick main frame with the other end supported by a pillar.
Since construction of this Kagume-waku required skills and experience,
there was at least one expert worker who could perform this task in each Coal Mine.