掘削装置

Japanese Patent JP6933839

B2

To solve a problem that, when conventionally liquid is supplied from three fixed side flow channels D branching from one main flow channel concurrently to respective rotational side flow channels C, deviation of liquid supply is generated among the respective flow channels and liquid cannot be uniformly supplied to each excavation shaft.SOLUTION: In an excavation device, swivel joints 13 are provided in a predetermined portion in an outer periphery of a plurality of rotation shafts 3 including a vertical shaft flow channel 22 in an axial center direction inside. A branch pipe 16 branching from a main supply pipe 18 is connected to each swivel joint 13. A fixed side flow channel 20 communicating with the branch pipe 16 is provided in the swivel joint 13. Liquid is supplied to the vertical shaft flow channel 22 in a state in which each fixed side flow channel 20 communicates with a rotational side flow channel 21 provided in each rotation shaft 3. As to each rotational side flow channel 21 of the plurality of rotation shafts 3 and the fixed side flow channel 20 of each swivel joint 13, in a state in which the fixed side flow channel 20 communicates with any one rotational side flow channel 21, communication between the other fixed side flow channel 20 and the rotational side flow channel 21 is blocked.SELECTED DRAWING: Figure 3

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Horikiri section
Shingo Yoshida
Atsuo Tsuchiya
Yusuke Tanaka
Yuichi Hayashi

JP2017220697A

September 08, 2021

November 16, 2017

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Tenox Co., Ltd.
Santo Industry Co., Ltd.
Taiyo Foundation Industries Co., Ltd.
Sanwa Equipment Co., Ltd.

E02D3/12; E02F3/36; E02F5/02

JP8068288A
JP2017082517A

Takefumi Tanaka
Junichiro Shinseki
Chiaki Shinseki

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