| 摘要 |
FIELD: catching equipment for fish and other hydrobionts. ^ SUBSTANCE: four versions of traps are described, which contain netted web, rod-type carcass with rods pivotally connected with their proximate ends to central pivot hinge, and strap system for setting of netted web and lifting of trap. Strap system comprises straps secured with each other by their upper ends at securing point and connected with outer ends of rods. According to first version, strap system is further equipped with central strap, whose lower end is fixed on central pivotal means and on whose upper end is fixed guiding sleeve with straps having been passed therethrough for sliding, said straps extending from point where said straps are connected to rods outer ends for providing fast bringing thereof together and reliable holding of outer ends of rods. According to second version, straps secured with their upper ends to one another are passed for sliding through eyelets provided on outer ends of rods, and are fixed with their lower ends in the vicinity of proximate ends of rods. Netted web is set on strap branches between point of securing and eyelets, and on strap branches between eyelets and point of securing of their lower ends. Trap is therefore used as small-sized vertical bottom net. Strap system of third and fourth versions includes straps for successive connection of outer ends of rods, with netted web being set on said straps at site below said rods. According to third version, straps secured to one another with their upper ends are passed for sliding through eyelets at outer ends of rods and are successively fixed with their lower ends on ends of adjacent rods. Netted web is set on thus formed strap branches to allow netted web to be removed from carcass for extraction of fish caught. According to forth version, additional vertical netted web is set on strap branches arranged between point of securing thereof with outer ends of rods, and also on rods, said straps being connected with ends of said rods. So, one netted web serves as horizontal net and other netted web serves as vertical net to thereby increase reliability in determining of pecking and fish holding time. ^ EFFECT: increased efficiency and wider operational capabilities. ^ 25 cl, 9 dwg |
