Title:
LINING BOARD
Document Type and Number:
Japanese Patent JP3585455
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide lining boards having a hole portion used for providing access for persons, carrying in materials, carrying out sediment or the like and a closing member for closing the hole portion; even though the closing member is removed and dropped when opening the hole after taking the closing member, the closing portion is never dropped down to the inside of the excavated pit through the hole portion and also the closing member can be linked to prevent it from being lifted upward.
SOLUTION: A circular hole portion 6 and an inner edge portion 9 protruded toward the center of the hole portion 6 are provided, and the lining boards 1 are constituted with a board member 5 for covering an opening 4 and a circular closing member 7 which is supported by an inner edge portion 9, closes the hole portion 6 and is equipped with a linking portion 11, the inner edge portion 9 is provided so as to support the whole of the edge portion of a surface facing the inner side of the excavated pit 3 of the closing member 7, thereby rotating the closing member 7 or the linking portion 11 and linking the closing member 7 to the board member 5 by the linking portion 11.
Inventors:
Hisaichi Suzuki
Application Number:
JP2001170630A
Publication Date:
November 04, 2004
Filing Date:
June 06, 2001
Export Citation:
Assignee:
Nishimatsu Construction Co., Ltd.
International Classes:
E02D29/14; E01C9/08; (IPC1-7): E01C9/08
Domestic Patent References:
| JP2047206U | ||||
| JP13019462Y1 | ||||
| JP44011349Y1 | ||||
| JP2001098573A |
Attorney, Agent or Firm:
Shinya Mayama