JPH0353653Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an off-bottom fishing gear used for off-bottom fishing operations in which the seine is lifted off the seabed.

[Prior art and its problems] In general, in fishing methods using seine nets, when the target is fish that live far from the seabed, crabs and shrimp living along the seabed are harvested. Off-bottom fishing operations are carried out to prevent bycatch of fish such as fish.

For example, Figure 3 shows a conventional method of off-bottom fishing that prevents crab bycatch. In this conventional method, one ground rope 3 is suspended from the lower part of the water door and the armhole of the seine 1 via a plurality of hanging ropes 2, 2, and a plurality of ground ropes passed through the ground rope 3 are suspended. While bobbins 4, 4, . . . are brought into contact with the seabed 5, the trawl net 1 is moved off the bottom of the seabed 5 by a tugboat via net pennants 6, 6, .
A plurality of floats 7, 7, . . . are fixed to the upper part of the water door of the seine net 1 in order to adjust the floating of the seine net 1 as a whole and to open the net inlet.

However, in the conventional method shown in FIG. 3, the ground rope 3 and ground bobbin 4 are
Since the fish move while rubbing against the seabed, it is not possible to operate completely off-bottom, and there is a risk of damaging fishery resources such as crabs that live along the seabed 5.

Conventionally, as shown in Fig. 4, a plurality of floats 8, 8... are fixed to the lower part of the water door and the sleeve rope part of the seine 1, and a plurality of tarashi chains 9, 9... are suspended from the same part. A rope (not shown) is attached to the lower end or middle part of each lowered or suspended chain 9.
These tarashi chains 9,9...
The seine net 1 was taken off the bottom while contacting the seabed 5.

However, in this method of holing out of the bottom using the drag chain 9, there was a problem that the drag chain 9 became entangled with the drag net 1 while the drag net 1 was being cast from a boat.

In addition, in the conventional examples shown in FIGS. 3 and 4, the work of adjusting the distance off the bottom between the seine 1 and the seabed 5 was very complicated and took a long time. In one figure 3, the lengths of the plurality of hanging ropes 2, 2... must be adjusted respectively, and in the other figure 4, the plurality of floats 7, 7...
It was necessary to adjust the buoyancy of... Therefore, while adjusting the distance from the bottom, there was a risk that the target fish would run away and the fishing opportunity would be lost.

[Purpose of invention]

The present invention has been developed in view of these points, and has a simple configuration that allows for reliable seine fishing off the bottom, and allows for easy and quick adjustment of the distance off the bottom, thereby improving the catch of fish. The purpose of the present invention is to provide fishing gear that allows fishing with an off-bottom lure without missing an opportunity.

[Summary of the idea]

The off-bottom fishing gear of the present invention consists of a tow line connected to a net pennant of a tow net, which is derived from a tow boat and whose underwater weight and buoyancy are approximately equal, and a float attached to a rope part consisting of this net pennent. and a settling chain suspended from the rope portion, and adjusting the distance of the seine off the bottom by adjusting the settling force due to the portion of the seine rope and the settling chain that is not in contact with the ground, and the buoyancy force due to the float. It is characterized by being formed to a value of

[Example of idea]

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 and FIG. 2 show an example when used in a turning operation.

In this embodiment, the front ends of the net pennants 6, 6 provided on the left and right sides of the front end of the towing net 1, and the left and right towing ropes 11, 11 led out from the towing boat 10,
Floaters 12, 12 are attached to the connecting portions with the rear ends, respectively, and settling chains 14 are suspended from the connecting portions via hanging ropes 13, respectively.
The hanging lengths of these hanging ropes 13 and the settling chain 14 from the tow rope 11 are set so that the settling chain 14 does not become entangled with the towing net 1. In the fishing operation, an otter boat (not shown) that applies net-spreading force to the seine 1 is not used, so the seine line 11 is not used.
By bringing the intermediate portion 11a between the towing net 1 and the towing boat 10 into contact with the seabed 5, the left and right towing ropes 11 are prevented from coming close to each other, and the towing net 1 is expanded while trawling. ing.

Further, in this embodiment, the distance H of the seine 1 off the bottom is adjusted by adjusting the underwater weight of the seine 11, the buoyancy of the float 12, and the underwater weight of the settling chain 14. Here, the underwater weight W of the net 1, the plurality of floats 7 for opening the net entrance,
It is desirable that the buoyant force F of 7, etc., satisfies F≒W.
The buoyant force f of the float 12 may be such that it floats the rear end of the towline 11 with respect to the intermediate portion 11a that is in contact with the seabed 5. For example, preferably, the buoyancy f of the towline 11 is It is preferable to make the weight larger than 1/2 of the underwater weight Wr on the rear end side of 11a. And the hanging rope 13 and the settling chain 1
The sum of the underwater weights Wc of 4 is the buoyancy f of the float 12.
and 1/2 of the underwater weight Wr of the trawl 11, Wx, that is, f-Wr/2, and the sedimentation weight that causes the trawl 1 to sink
It is formed by the sum with Wy.

Next, the operation of this embodiment will be explained.

In this embodiment, the separation distance H of the seine net 1 is set to a predetermined value by using a simple structure in which the float 12 is attached to the rear end of the seine line 11 and the settling chain 14 is suspended via the suspension rope 13. It can be reliably held and hauled. In other words, in the state shown in FIG. (including the weight of) (Wr + Wx)
balances with the buoyant force f of the float 12 and maintains a predetermined separation distance H of the seine 1. However, for example, if there is a hole in the seabed, the sinking chain of the part of the hole that is originally in contact with the seabed may If float 14 is suspended, the value of Wr + Wx will increase by that amount and exceed the buoyancy force f of float 12, so f =
The tow rope 11 descends against the buoyancy f of the float 12 until Wr+Wx, and a predetermined separation distance H can be maintained. In short, the underwater gravity of Hikko 11
By adjusting the balance between the sum of Wr, the underwater gravity Wx of the hanging rope 13 and the settling chain 14, and the buoyancy f of the float 12, the seine 1 can be held at an arbitrary distance H. Moreover, the balance adjustment can be done by simply changing the buoyancy of the floats 12 attached to the left and right tug ropes 11, changing the length of the settling chain 14, or combining both changes, making the change work extremely easy. And it can be done quickly. Therefore, the target fish can be reliably caught without missing a fishing opportunity, and operational efficiency can be greatly improved.
In addition, since the length of the hanging rope 13 and the settling chain 14 from the towing line 11 is set to a length that does not allow the settling chain 14 to get entangled with the towing net 1, the work of casting the towing net 1 is facilitated. .

In addition, in order to apply a sinking force to the buoyancy force f of the float 12, it is possible to attach a weight to the tug rope 11 instead of the settling chain 14, but it is better to use the settling chain 14 to adjust the sinking force simply by adjusting its length. This is convenient for adjusting the distance H of the net 1 off the bottom, and if it is used as a weight, there is a possibility that the weight part will touch the seabed 5 and the seine net 1 will not be able to go off the bottom.

In the embodiment described above, the float 12, the hanging rope 13, and the settling chain 14 were attached to the connection part with the net pennant 6 at the rear end of the trolley rope 11, but these attachment positions may vary depending on the purpose of use, etc. It is good to change it to an arbitrary part of the rope part consisting of 6 and the rope 11.

Also, the hanging rope 13 is omitted and the settling chain 1
4 may be attached directly to the rope section, or the settling chain 14 and float 12 may be attached at different positions. Furthermore, the set of float 12 and settling chain 14 is
A plurality of sets may be attached to the left and right rope portions of the tug rope 11, respectively.

In addition, although the above-mentioned embodiment is applied to a trawl operation, the present invention can be similarly applied to a trawl operation in which the trawl 11 is not brought into contact with the seabed 5.

Further, the present invention is not limited to the above embodiments, and can be modified as necessary.

[Effect of idea]

Since the seine fishing gear of the present invention is constructed and operates in this way, the seine can be reliably sewn to the bottom with a simple configuration, and the distance off the bottom can be adjusted easily and quickly. This has the effect of allowing fishing to be carried out off-bottom without missing any fishing opportunities.

[Brief explanation of drawings]

Figures 1 and 2 show the operation state of the bottom line using the bottom line fishing gear of the present invention. Figure 1 is a side view, Figure 2 is a perspective view of the main part, and Figures 3 and 4 are FIG. 3 is a perspective view showing a conventional out-of-bottom operation state. 1... Towing net, 10... Towing boat, 11... Towing rope, 1
2...Float, 13...Hanging rope, 14...Sinking chain.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A tow line connected to a net pennant of a tow net that is derived from a tugboat and whose underwater weight and buoyancy are approximately equal, and a float attached to a rope portion consisting of this net pennant. and a sinking chain suspended from the rope portion, and a sinking force due to a portion of the rope and the sinking chain that is not in contact with the ground;
An off-bottom fishing gear, characterized in that the buoyancy of the float is set to a value that adjusts the distance of the seine from the bottom. 2 The float has a buoyant force greater than its underwater weight from the grounded part of the tow line to the connection part with the line pennent, and the length of the sinking chain including the part that touches the seabed is such that its underwater weight is greater than the underwater weight of the float. The off-bottom fishing gear according to claim 1, wherein the fishing gear is formed to have a length that is greater than the difference between buoyancy and the underwater weight of the towing line. 3. The off-bottom trawl fishing gear according to claim 1 or 2 of the utility model registration claim, characterized in that the hanging length of the sinking chain is set to such a length that the sinking chain does not get entangled in the trawl net. .