Trawl net layer-by-layer collecting device

• Main Authors: TOKAI TADASHI, KUBOTA HIROSHI, OZEKI YOSHIOKI, INO TETSURO, TOMATSU CHIAKI, HU FUXIANG
• Format: Patent
• Language: English
• Published: 19.11.2009
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FISHING; FORESTRY; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; HUMAN NECESSITIES; HUNTING; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; NEW BREEDS OF ANIMALS; PHYSICS; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; REGULATING; TRAPPING

To provide a lightweight trawl net layer-by-layer collecting device capable of autonomously switching opening and closing of a net mouths of trawl nets. The trawl net layer-by-layer collecting device comprises: a rectangular cylindrical frame 2 configured to draw a plurality of trawl nets 13a, 13b, 13c, and 13d that are arranged in an up and down direction, the frame including an upper edge to which a net mouth edge of an upper net of the uppermost trawl net 13a is anchored, and a lower edge to which a net mouth of a lower net of the lowermost trawl net 13d is anchored; a pair of vertical bars 3 disposed on opposed sides of the frame 2; a slider 12 whose opposed ends are slidably engaged with the vertical bars 3, the slider anchoring thereto the net mouth edge of the lower net of the upper trawl net and the net mouth edge of the upper net of the lower trawl net; a net-mouth opening and closing unit 8 configured to lock the sliders 12 on upper ends of the vertical bars 3, and unlock the locked sliders 12 one by one; and a controller 9; wherein: the controller 9 includes a timer, and a storage medium storing a predetermined net-towing time period as a timing for activating the net-mouth opening and closing unit 8; and the controller 9 inputs a net-towing time obtained from the timer, and activates the net-mouth opening and closing unit 8 upon arrival of the predetermined net-towing time period stored in the storage medium.