Title:
DRAIN TUBE
Document Type and Number:
Japanese Patent JP2023099918
Kind Code:
A
Abstract:
To provide a drain tube inserted after drilling with a double tube, causing no co-lifting.SOLUTION: Provided is a drain tube 1 remaining in a hole H drilled by using a double tube on a slope, after drawing out an outer tube D of the double tube. The drain tube has multiple joint cylinders 10 of prescribed length having slits 11 communicating inner and outer circumferences with each other and extending by connecting in the axial direction, a joint 30 for inserting each of two joint cylinders 10 so as to butt with each other, and a lid 20 being a bottomed cylinder fitted into the topmost joint cylinder 10, with a bottom part net-likely formed. On a side periphery of the joint cylinder 10 and/or the joint 30 and/or lid 20, three or four legs 22, 32 expanded backward in the insertion direction and falling and restoring following a diameter of the hole H and rotation symmetrical in relation to a shaft are provided.SELECTED DRAWING: Figure 2
Inventors:
ARAHAMA YUJI
Application Number:
JP2022000142A
Publication Date:
July 14, 2023
Filing Date:
January 04, 2022
Export Citation:
Assignee:
ARAHAMA YUJI
International Classes:
E02D17/20; E02D3/10
Attorney, Agent or Firm:
Yoshihiro Tanabe