JPS5836276Y2 - fishing equipment - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a hard-working device with diving wings.

As shown in FIG. 1, a conventional fishing device with diving wings has a diving device 3 attached to a diving device frame 2 attached to the entrance of a trawl net 1.
. I was supposed to adjust it and do it.

That is, as shown in FIG. 2, the fluid resistance force of the network 1 is Rn
, the fluid resistance force of frame 2 is Rf, and the underwater weight of net 1 is W
Assuming that the underwater weight of the frame 2 is Wf, the drag force of the diving gear 3 and 4 is D, and the lift force is L, the angle θ between the tow line 5 and the water surface is approximately expressed as follows.

L, D, Rf, and Rn are all proportional to the square of the towing speed V, but since Wf and wn are negligibly small compared to these, θ maintains an approximately constant angle regardless of the towing speed ■. It turns out.

Therefore, the only way to change the operating depth is to adjust the length of the tug 5.

In the above-mentioned hard work device, as shown in Figure 1, the network 1
If the suction pipe 7 connected to the fish pump installed on the boat is connected to the rear end of the boat to suck up the fish caught by the net 1 onto the boat, when changing the fishing depth, the towing line At the same time as the length of the suction pipe 7 is adjusted, the length of the suction pipe 7 must also be adjusted.

However, the suction pipe 7 is usually directly connected to the fish pump, and in large equipment, the diameter of the suction pipe becomes quite large, so in fact the suction pipe 7
Frequent adjustment of the length was difficult.

The present invention was proposed in view of the above-mentioned points, and consists of a quadrilateral frame with diving wings attached to the entrance of a trawl net, in which the joints of the frame are rotatable, and the quadrilateral shape of the frame is changed. The feature is that a telescopic cylinder is installed that can be controlled from the ship to adjust the angle of attack of the diving equipment.
The purpose of the present invention is to provide a fishing device that can change the fishing depth at any time while keeping the length of the suction pipe constant.

Since the present invention is constructed as described above, when the stroke of the telescopic cylinder is controlled from the ship, the shape of the quadrilateral frame changes, and the angle of attack of the diving equipment attached to the same frame is adjusted. As the drag and lift values change, the angle between the trawl line and the water surface changes, allowing the operating depth to be changed while keeping the length of the trawl constant.

Therefore, even when the suction pipe is connected, fishing can be carried out continuously by changing the fishing depth at any time while keeping the length of the suction pipe constant.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 3 to 5.

In Fig. 3, 11 is a trawl net, 12 is a trawl 11
13° 14 is a diving wing attached to the frame 12, 15 is one end attached to the ship 16
The towing line 17 has one end connected to a fish pump (not shown) installed on the ship 16, and the other end connected to the trawl net 1.
1 is supported by a pull line 15 through a suction pipe for a fish pump connected to the rear end of the fish pump.

18 is a stabilizer for preventing meandering attached to the lower part of the frame 12, and 19 is a stabilizer for preventing swinging of the rear end of the trawl net 11.

As shown in FIGS. 4 and 5, the above-mentioned frame 12 is configured to be rotatable by connecting the joints with pins, and has a connecting device 20 for the above-mentioned rope 15 in the center. are similarly pin-coupled.

An electric cylinder 21 is installed between the horizontal beam 12a and the vertical beam 12b constituting the frame 12.

The piston of this electric cylinder 21 is operated by electric power supplied from the ship via electric wiring, and the stroke thereof is changed.

Note that the attachment position of the connector 20 of the pull line 15 is desirably on the vector extension line of the resultant force of the forces acting on each part.

The water level at which fish are distributed differs depending on the type of fish, and the water level at which they are distributed changes depending on the time of day, so it is necessary to change the depth of the trawl net during operation.

In this embodiment, when power is supplied to the cylinder 21, its piston is actuated to change its stroke and the shape of the quadrilateral frame 12 to change.

Therefore, in response to the change in the shape of the frame 12, the angle of attack of the submersible wing 13.14 attached to the frame 12 is adjusted, and the values of drag and lift due to the submersible wing 13.14 change. The angle θ between the above-mentioned tow rope 15 and the water surface changes.

A change in the angle θ means a change in the depth of the trawl net 11, so it is possible to change the operating depth while keeping the length of the dragline 15 constant, that is, the length of the suction pipe 17 as well. becomes.

Although the above embodiment uses an electric cylinder 21, a hydraulic, water pressure, or pneumatic cylinder may also be used. In this case, piping would be used instead of electrical wiring, and these may be supported on the pull line 15 in the same way as the suction pipe 17, and the suction pipe 17 is not necessarily supported on the pull line 15.
There is no need to support it.

Furthermore, each of the above-mentioned cylinders is equipped with a detection mechanism that detects the amount of movement, converts the amount of movement into an electrical signal, and sends this to the ship as a single signal.On the ship, a fish finder is used to detect schools of fish. The distance to be moved is calculated based on this, and this is compared with the above-mentioned signal as a child signal.At the position where the sum becomes zero, the electric power is applied to the cylinder 21.
It is also possible to automatically change the operating depth by stopping the driving source for operating the .

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing an example of the conventional device, Fig. 2 is a diagram for explaining the angle formed between the water surface and the towline during towing of the device, and Figs. 3 to 5 are diagrams of the device of the present invention. One embodiment is shown in which FIG. 3 is a schematic side view, FIG. 4 is an enlarged side view of the main part, and FIG. 5 is the homeland A of FIG. 4. 11 Nidrol net, 12: Quadrilateral frame, 13, 14
: Submarine wing, 21 Nijilinda.

Claims (1)

[Scope of utility model registration request] A quadrilateral frame with diving wings that is attached to the entrance of the trawl net is constructed such that its joints are rotatable, and a telescopic cylinder is mounted on the ship to adjust the angle of attack by changing the quadrilateral shape of the frame. A device for intense work that is characterized by being installed in a way that allows greater control.