Fish collecting device
One object is to provide a fish collecting device having a simple structure whereby free rotation of a propeller is prevented in casting, and the propeller can rotate freely under water. The propeller body is formed of one metal plate or an integral resin mold; a front end stopper and a rear end stopper are formed of bent or projected parts of the propeller body at the front end and rear end of the propeller body, and a rotary shaft, inserted through holes formed in the front end stopper and the rear end stopper, has a rotation restricting portion for contacting the propeller body. Free rotation of the propeller body in casting can be restricted by a simple structure wherein the rotation restricting portion contacts the propeller body and the rotary shaft engages with the propeller body such that the propeller body is unrotatable with respect to the rotary shaft.
1. A fish collecting device comprising:
a propeller body including:
one or more rotary wings;
a front end stopper formed at a front end of the propeller body and having a hole; and
a rear end stopper formed at a rear end of the propeller body and having a hole, and
a rotary shaft inserted through the holes and supporting the propeller body so as to be rotatable and movable in an axial direction, the rotary shaft including a rotation restricting portion, separate from the rear end stopper, for contacting the propeller body,
wherein the propeller body and the rotary shaft relatively move between a first arrangement in which the propeller body freely rotates with respect to the rotary shaft and a second arrangement in which the rotation restricting portion contacts the propeller body and the rotary shaft is engaged with the propeller body such that the propeller body is unrotatable with respect to the rotary shaft, and
wherein the rotation restricting portion is formed of an axial middle portion of the rotary shaft bent into an arc, triangular, or rectangular shape, wherein a rotation space, having a circular or oval shape, is provided in a middle portion of the propeller body, and wherein in the first arrangement of the propeller body and the rotary shaft, the axial middle portion of the rotary shaft is arranged in the rotation space, thereby allowing the propeller body to rotate freely without contacting the rotation restricting portion, and
wherein the propeller body further includes a rotation stopping portion formed adjacent to the rotation space and capable of receiving a part of the rotation restriction portion.
2. The fish collecting device of claim 1 wherein the propeller body is formed of one metal plate, and each of the front end stopper and the rear end stopper is formed of a bent part of the metal plate.
3. The fish collecting device of claim 1 wherein the propeller body is formed of an integral molded resin.
4. The fish collecting device of claim 1 wherein the front end stopper and the rear end stopper are bent in opposite directions or in the same direction with respect to the propeller body.