Title:
網場及び魚道
Document Type and Number:
Japanese Patent JP7130691
Kind Code:
B2
Abstract:
To provide a boom in which passage of creatures is possible even when a water level is lowered.SOLUTION: A boom 1 comprises: ropes 10, 20 bridged in a prescribed water area; a plurality of floats 30 connected with the ropes 10, 20; and nets 40, 50 connected with the ropes 10, 20 or the floats 30 and at least a part of which is positioned underwater. The boom 1 includes a fish passage 60 positioned below a water surface. The fish passage 60 includes: at least two opening portions 63 opened with the nets 40, 50 interposed therebetween, in or below the nets 40, 50; and a path 64 connecting the opening portions 63 with each other. The narrowest area of the opening portions 63 and the path 64 is larger than an area of a mesh of the net.SELECTED DRAWING: Figure 3
Inventors:
Nobuyoshi Yamamoto
Application Number:
JP2020063638A
Publication Date:
September 05, 2022
Filing Date:
March 31, 2020
Export Citation:
Assignee:
Tech Notes Co., Ltd.
International Classes:
E02B15/00; E02B8/08
Domestic Patent References:
| JP2012180733A | ||||
| JP63036530U | ||||
| JP5192693A | ||||
| JP2005036453A | ||||
| JP2003129456A | ||||
| JP46005314Y1 |
Foreign References:
| KR1020200032874A |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda
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