{"created":"2021-03-01T06:43:31.518993+00:00","id":25555,"links":{},"metadata":{"_buckets":{"deposit":"50a18fdf-9a9e-4dc5-a340-680a7850c904"},"_deposit":{"id":"25555","owners":[],"pid":{"revision_id":0,"type":"depid","value":"25555"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00025555","sets":["27:2466:2467:2585","9:504:2469:2586"]},"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Log-Loading with a Hydraulic Grapple-Crane"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1988","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"8","bibliographicPageStart":"1","bibliographicVolumeNumber":"78","bibliographic_titles":[{"bibliographic_title":"東京大学農学部演習林報告"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"最近になって，わが国でもようやくグラップルクレーンが普及し始めている。グラップルクレーンを中心に木材積込作業について調査した結果，積込作業能率はグラップルクレーンが20.405m3/人時，小型ウィンチクレーンが6.217m3/人時，手積が0.867m3/人時となり，グラップルクレーンが非常に高能率であることが確認された。手積作業では，トラックまでの材の木寄せならびに椪の整理に，積込時間の64％を要していた。小型ウィンチクレーンは林内作業車の付属クレーンではあったが，スリングロープのつけかえが，積込作業の53％を占めていた。積込作業の費用は，試算の結果，人件費がグラップルクレーン83円/m3，小型ウィンチクレーン273円/m3，手積1961円/m3となり，グラップルクレーンのベースマシーン代，クレーン代および燃料油脂費は，高能率のためそれぞれ，40円/m3，21円/m3，6円/m3となり，人件費と合計しても手積作業の僅かに1割である。事業量によっては積込作業で節減できた費用によって，積込作業とつりあいがとれるような他の高度な機械投資を可能ならしめるものである。さらに，グラップルクレーンによれば，単に木材積込費用の低減のみならず，トラック運材の待ち時間を利用して，土場整理や，土場における造材作業補助を高能率に進めることができ，集材工程も円滑ならしめる。作業現場の位置によっては，貯木場までの1日当りのトリップ数を稼ぐことも可能であり，作業システムの総合評価の見地からも，間接的な経費節減は非常に大きい。","subitem_description_type":"Abstract"},{"subitem_description":"Recently, hydraulic grapple-cranes have come into use in Japan. The log-loading productivity of our experiments with three methods was 20.405m3/man-hour by hydraulic grapple-crane, 6.217m3/man-hour by small winch-crane, and 0.867m3/man-hour manually, thus recognizing that the hydraulic grapple-crane is the most efficient. Handling logs from decks to the truck and arranging decks required 64% of the manual loading time. Hooking and unhooking sling ropes of a small winch-crane attached to a light forwarder required 53% of loading time. Hydraulic grapple-cranes can eliminate this additional work. Labor cost of loading was 83 yen/m3 by the hydraulic grapple-crane, 273 yen/m3 by the small winch-crane, and 1961 yen/m3 manually. Base-machine cost, crane cost, and fuel and oil cost of the hydraulic grapple-crane were only 40 yen/m3, 21 yen/m3, and 6 yen/m3, respectively, because of the high productivity. The total cost was only 10% of that of manual loading. The lower costs of hydraulic grapple-cranes enable the introduction of other high-performance logging-machines. Additionally, hydraulic grapple-cranes may reduce logging costs indirectly. For example, a hydraulic grapple-crane mounted on a back-hoe not only lowers the loading cost but also is useful for decking logs at the landing, which will bring about smoother logging operations. In some cases, it may enable an increase in the number of trips per day to the market.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"55380","nameIdentifierScheme":"WEKO"}],"names":[{"name":"SAKAI, Hideo"}]},{"nameIdentifiers":[{"nameIdentifier":"55381","nameIdentifierScheme":"WEKO"}],"names":[{"name":"MINAMIKATA, Yasushi"}]},{"nameIdentifiers":[{"nameIdentifier":"55382","nameIdentifierScheme":"WEKO"}],"names":[{"name":"ITO, Koya"}]},{"nameIdentifiers":[{"nameIdentifier":"55383","nameIdentifierScheme":"WEKO"}],"names":[{"name":"NITAMI, Toshio"}]},{"nameIdentifiers":[{"nameIdentifier":"55384","nameIdentifierScheme":"WEKO"}],"names":[{"name":"IWAOKA, Masahiro"}]}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学大学院農学生命科学研究科附属演習林"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162451","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03716007","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"610","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"The Tokyo University Forests"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学農学部林学科"},{"subitem_text_value":"（現勤務先）宇都宮大学農学部林学科"},{"subitem_text_value":"東京大学農学部附属秩父演習林"},{"subitem_text_value":"Department of Forestry, Faculty of Agriculture, University of Tokyo"},{"subitem_text_value":"(Present address) Department of Forestry, Faculty of Agriculture, Utsunomiya University"},{"subitem_text_value":"Experimental Forest at Chichibu, Department of Forestry, Faculty of Agriculture, University of Tokyo"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"酒井, 秀夫"}],"nameIdentifiers":[{"nameIdentifier":"55375","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"南方, 康"}],"nameIdentifiers":[{"nameIdentifier":"55376","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"伊藤, 幸也"}],"nameIdentifiers":[{"nameIdentifier":"55377","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"仁多見, 俊夫"}],"nameIdentifiers":[{"nameIdentifier":"55378","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"岩岡, 正博"}],"nameIdentifiers":[{"nameIdentifier":"55379","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-09"}],"displaytype":"detail","filename":"esrh078001.pdf","filesize":[{"value":"838.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"esrh078001.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/25555/files/esrh078001.pdf"},"version_id":"7dfab5d2-ce62-4d05-acf6-341e8e496a59"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"グラップルクレーンによる木材積込作業","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"グラップルクレーンによる木材積込作業"}]},"item_type_id":"4","owner":"1","path":["2586","2585"],"pubdate":{"attribute_name":"公開日","attribute_value":"2014-09-03"},"publish_date":"2014-09-03","publish_status":"0","recid":"25555","relation_version_is_last":true,"title":["グラップルクレーンによる木材積込作業"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T04:03:44.200533+00:00"}