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Title: ドイツ製枝払い装置BaumHexeの枝打ち作業への適用試験 (I) : 装置の人力及び機械移動に関する作業功程と作業者の生理的負担について
Other Titles: An Experiment Applied to Pruning by German Delimbing Unit BaumHexe (I) : Operational Output and Physiological Load on Manual and Mechanical Movement of Unit
Authors: 沼田, 邦彦  KAKEN_name
山本, 俊明  KAKEN_name
鈴木, 保志  KAKEN_name
酒井, 徹朗  KAKEN_name
神崎, 康一  KAKEN_name
瀧本, 義彦  KAKEN_name
芝, 正己  KAKEN_name
石川知明  KAKEN_name
Author's alias: Numata, Kunihiko
Yamamoto, Toshiaki
Suzuki, Yasushi
Sakai, Tetsurou
Kanzaki, Kouichi
Takimoto, Yoshihiko
Shiba, Masami
Ishikawa, Tomoaki
Issue Date: 21-Dec-1992
Publisher: 京都大学農学部附属演習林
Journal title: 京都大学農学部演習林報告
Volume: 64
Start page: 156
End page: 164
Abstract: ドイツで立木の価値向上を目的に開発された枝打機BaumHexeは作業速度の高速性、高い枝打ち高においても簡単に、迅速に処理する将来性のある有力な機械と考えられる。このように期待の持てる機械であるか, 日本のスギ, ヒノキの人工林の枝打ち装置として使用できるのか, どのような機械的改善が必要なのか, また作業システムとしてどのような基盤整備, どのようなベースマシンが必要であるのかといった適応の可能性について検討した。本報告では枝打ち作業の作業功程と作業者の生理的負担の観点から試験結果をとりまとめた。枝打ち装置の移動方式について人力式と機械式の両面から試験を行った。Head部を携行して急傾斜の林地移動を行う場合, 人力式は生理的負担が大きく, 機械式移動のできる作業システムが必要である。BaumHexeを枝打機として活用するために, 作業道の整備を図ると同時にBaumHexeを搭載し, 立木まで機械式にHeadを移動できる機械装置を持ったベースマシンの開発を期待する。作業功程では1時間当り約35本の枝打ちが可能であり, また枝打ち高は10メートルを越える枝下高に関しても高速, 安全に作業できる。間伐作業の場合, 収穫する間伐材の先行枝払いと残存立木の枝打ちを容易に素早く処理できる。現状の機械の改善点として先端刃が衝撃的打撃に対して損傷を受け易いこと, Head部の軽量化を図ること, 太い枝の残枝長が長く残った場合にHead部が降下できなくなることである。また雨水が樹幹流となって流れるときには枝打ち作業をしないことである。
BaumHexe was produced to aim at a pruning unit which makes trees high value timbers. We think BaumHexe will become a profitable and valid pruning unit that processes quickly and easily pruning operattion, even if trees have to be pruned higher than 10 meters under asts left. Thus, we have a great expectation to this pruning unit. So, we experimented with this unit to make sure whether this unit is able to use BaunHexe as pruning unit in Japanese cedar and Japanese cypress forests, whether this unit has problem points to be improved, what kinds of operational road network systems and base-machines we have to need to adapt this unit to Japanese artificial forests. We report the results in aspect with operational output and physiological load of workers on pruning operation by BaumHexe. We examined pruning operation on manual and mechanical movement methods of the unit in the steep forest at Wakayama experimental forest in Kyoto University. Carring the unit with workers gives them severe physiological load. Therefore, mechanical movement method surpasses manual movement method in physiological load of workers. We expect that the establishment of appropriate operational road network and the development of base-machine on which mounts the unit and can move it to trees mechanically. The pruning operational output amounts easily to about 35 trees/hour and can prune quickly and safely over 10 meters high under asts left. On thinning, we can use this unit in the two purposes for pre-delimbing of thinning trees and pruning of trees to be left. The problem points which have to be improved as a pruning unit, are as follows: 1. The brades set on the tip position of unit is fragile on the shock brow under the fast speed condition. 2. The weight of unit is too heavy for workers to carry it and to set it on the tree. 3. When, on climbing way, the tough ast is left in the lower position of the unit during pruning, the unit cannot get down along the tree. This rare case occurred only one time during the last experimental pruning operation. In the least, the unit has not to be used in pruning operation when the rain-water streams down along the trunk in rainy weather.
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