A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To automatically remove slack in an opening/closing wire rope so that a bucket can be closed sufficiently, to suppress a delay in a response of a bucket operation to a closing operation of a bucket and to improve operability.SOLUTION: A deep foundation excavator comprises: a lifting cylinder for raising and lowering a clamshell bucket; an opening/closing cylinder opening and closing the clamshell bucket; a slack removal cylinder removing slack in an opening/closing wire rope; a connecting oil passage connecting a first oil passage connecting a bottom side oil chamber of the lifting cylinder and a direction switching valve with a second oil passage connecting a bottom side oil chamber of the slack removal cylinder and the direction switching valve; and a solenoid valve opening and closing the connecting oil passage. When a lowering operation of the clamshell bucket and slack in the opening/closing wire rope are detected, the solenoid valve is opened to supply pressurized oil discharged from the lifting cylinder to the slack removal cylinder, to tension the opening/closing wire rope while the clamshell bucket is lowered.SELECTED DRAWING: Figure 3
【課題】開閉用のワイヤロープの緩みを自動的に取ってバケットが十分に閉じるようにし、バケットの閉操作に対するバケットの動作の応答遅れを抑制し操作性を向上させる。【解決手段】クラムシェルバケットを昇降させる昇降シリンダと、上記クラムシェルバケットを開閉させる開閉シリンダと、開閉用ワイヤロープの緩みを取る緩み取りシリンダと、上記昇降シリンダのボトム側油室及び上記方向切換弁を繋ぐ第１油路、並びに上記緩み取りシリンダのボトム側油室及び上記方向切換弁を繋ぐ第２油路を連絡する連絡油路と、上記連絡油路を開閉する電磁弁とを備え、上記クラムシェルバケットの降下操作、及び上記開閉用ワイヤロープの緩みを検知した場合、上記電磁弁を開いて上記昇降シリンダから排出される圧油を上記緩み取りシリンダに供給し、上記クラムシェルバケットの降下中に上記開閉用ワイヤロープを緊張させる深礎掘削機を提供する。【選択図】図３
To automatically remove slack in an opening/closing wire rope so that a bucket can be closed sufficiently, to suppress a delay in a response of a bucket operation to a closing operation of a bucket and to improve operability.SOLUTION: A deep foundation excavator comprises: a lifting cylinder for raising and lowering a clamshell bucket; an opening/closing cylinder opening and closing the clamshell bucket; a slack removal cylinder removing slack in an opening/closing wire rope; a connecting oil passage connecting a first oil passage connecting a bottom side oil chamber of the lifting cylinder and a direction switching valve with a second oil passage connecting a bottom side oil chamber of the slack removal cylinder and the direction switching valve; and a solenoid valve opening and closing the connecting oil passage. When a lowering operation of the clamshell bucket and slack in the opening/closing wire rope are detected, the solenoid valve is opened to supply pressurized oil discharged from the lifting cylinder to the slack removal cylinder, to tension the opening/closing wire rope while the clamshell bucket is lowered.SELECTED DRAWING: Figure 3
【課題】開閉用のワイヤロープの緩みを自動的に取ってバケットが十分に閉じるようにし、バケットの閉操作に対するバケットの動作の応答遅れを抑制し操作性を向上させる。【解決手段】クラムシェルバケットを昇降させる昇降シリンダと、上記クラムシェルバケットを開閉させる開閉シリンダと、開閉用ワイヤロープの緩みを取る緩み取りシリンダと、上記昇降シリンダのボトム側油室及び上記方向切換弁を繋ぐ第１油路、並びに上記緩み取りシリンダのボトム側油室及び上記方向切換弁を繋ぐ第２油路を連絡する連絡油路と、上記連絡油路を開閉する電磁弁とを備え、上記クラムシェルバケットの降下操作、及び上記開閉用ワイヤロープの緩みを検知した場合、上記電磁弁を開いて上記昇降シリンダから排出される圧油を上記緩み取りシリンダに供給し、上記クラムシェルバケットの降下中に上記開閉用ワイヤロープを緊張させる深礎掘削機を提供する。【選択図】図３
DEEP FOUNDATION EXCAVATOR
深礎掘削機
FURUKATA RYOTA (author)
2024-09-02
Patent
Electronic Resource
Japanese
IPC:
E02F
Baggern
,
DREDGING