A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PROBLEM TO BE SOLVED: To provide a bullet ditch forming apparatus having a structure in which its blade can form a groove smoothly by avoiding adverse effects due to stones buried underground, or straws or roots near a ground.SOLUTION: A blade 16 in a bullet ditch forming apparatus 11 is provided with an intermediate protrusion part 16a protruding frontward in a groove forming direction in an intermediate part in the vertical direction of a tip in the groove forming direction. An upper rear-slanting part 16b whose upper portion slants rearward in the groove forming direction is provided on the upper side than the intermediate protrusion part, and a lower rear-slanting part 16c whose lower portion slants rearward in the groove forming direction is provided on the lower side than the intermediate protrusion part. Also, the lower rear-slanting part is inserted into subsoil 13a below a plow layer 13b on a ground surface side of a farm field 13 in a bullet ditch forming state in which the blade is inserted underground in a vertical direction.SELECTED DRAWING: Figure 1
【課題】地中に埋まっている石や地面付近の藁や根による悪影響を回避してブレードによる溝の形成を円滑に行うことができる構造を有する弾丸暗渠形成装置を提供する。【解決手段】弾丸暗渠形成装置１１におけるブレード１６は、溝形成方向先端の上下方向中間部に、溝形成方向前方に突出した中間突出部１６ａが設けられ、中間突出部より上部側には、上方が溝形成方向後方に向かって傾斜した上部後傾部１６ｂが設けられ、中間突出部より下部側には、下方が溝形成方向後方に向かって傾斜した下部後傾部１６ｃが設けられるとともに、下部後傾部は、ブレードを鉛直方向に地中に挿入した弾丸暗渠形成状態で、圃場１３の地表面側の作土１３ｂより下方の心土１３ａ中に挿入される。【選択図】図１
PROBLEM TO BE SOLVED: To provide a bullet ditch forming apparatus having a structure in which its blade can form a groove smoothly by avoiding adverse effects due to stones buried underground, or straws or roots near a ground.SOLUTION: A blade 16 in a bullet ditch forming apparatus 11 is provided with an intermediate protrusion part 16a protruding frontward in a groove forming direction in an intermediate part in the vertical direction of a tip in the groove forming direction. An upper rear-slanting part 16b whose upper portion slants rearward in the groove forming direction is provided on the upper side than the intermediate protrusion part, and a lower rear-slanting part 16c whose lower portion slants rearward in the groove forming direction is provided on the lower side than the intermediate protrusion part. Also, the lower rear-slanting part is inserted into subsoil 13a below a plow layer 13b on a ground surface side of a farm field 13 in a bullet ditch forming state in which the blade is inserted underground in a vertical direction.SELECTED DRAWING: Figure 1
【課題】地中に埋まっている石や地面付近の藁や根による悪影響を回避してブレードによる溝の形成を円滑に行うことができる構造を有する弾丸暗渠形成装置を提供する。【解決手段】弾丸暗渠形成装置１１におけるブレード１６は、溝形成方向先端の上下方向中間部に、溝形成方向前方に突出した中間突出部１６ａが設けられ、中間突出部より上部側には、上方が溝形成方向後方に向かって傾斜した上部後傾部１６ｂが設けられ、中間突出部より下部側には、下方が溝形成方向後方に向かって傾斜した下部後傾部１６ｃが設けられるとともに、下部後傾部は、ブレードを鉛直方向に地中に挿入した弾丸暗渠形成状態で、圃場１３の地表面側の作土１３ｂより下方の心土１３ａ中に挿入される。【選択図】図１
BULLET DITCH FORMING APPARATUS
弾丸暗渠形成装置
ONODERA TSUNEO (author)
2018-08-09
Patent
Electronic Resource
Japanese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau