Title:
CORE COLLECTION BIT
Document Type and Number:
Japanese Patent JP2021130923
Kind Code:
A
Abstract:
To stably collect core regardless a nature of a ground.SOLUTION: A cylindrical tool main body 2 extending along a tool axis C1, a cylindrical head blade body 3 extending along a head axis C2 parallel to the tool axis C1 and rotatable around the head axis C2, a cylindrical rotational blade body 4 stored in the tool main body 2 to be positioned on a rear end side of the head blade body 3 and rotatable around a rotational axis C3 extending in an orientation crossing the head axis C2, and a cam mechanism 5 that rotates the rotational blade body 4 with respect to the tool main body 2 around the rotational axis C3 according to the rotation around the head axis C2 of the head blade body 3 with respect to the tool main body 2 are included. The head blade body 3 includes a drilling tip 3a at a distal end portion, and connects to, or can be connected to an inside of the rotational blade body 4 and an inside of the tool body 2 with each other. The cam mechanism 5 relatively moves the head blade body 3 and the rotational blade body 4 between an opening state where the inside of the head blade body 3 and the inside of the rotational blade body 4 are connected with each other, and a closed state where the connection between the inside of the head blade body 3 and the inside of the rotational blade body 4 is disconnected.SELECTED DRAWING: Figure 6
Inventors:
TAKATSUKI YUKI
TOMITA YASUTAKA
TOMITA YASUTAKA
Application Number:
JP2020025558A
Publication Date:
September 09, 2021
Filing Date:
February 18, 2020
Export Citation:
Assignee:
MMC RYOTEC CORP
International Classes:
E21B10/02; E02D1/04; E21B25/00
Attorney, Agent or Firm:
Yasushi Matsunuma
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami