JP2014079200A - Boat seine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a boat seine capable of efficiently rejecting a non-capturing target such as jellyfish and preventing a capturing target such as white bait and sand lances from failing to be captured.SOLUTION: A boat seine 100 includes: a sleeve net part 110; a fish-capturing bag part 140; a body net part 120 between the sleeve net part and the fish-capturing bag part; and a jellyfish-excluding discharge part 130 provided as an inner bag body inside the body net part 120. A discharge outlet port 133 of the jellyfish-excluding discharge part 130 is provided on a side surface of the body net part 120. A shape of the discharge part 130 is formed such that, when an opening circumference of an inlet port 131 of the discharge part 130 is divided into a first circular arc 1311 and a second circular arc 1312, a net starting from the first circular arc 1311 is concentrated to a tip end periphery 1331 of the outlet opening edge of the discharge part 130, and a net starting from the second circular arc 1312 is directed to an entire opening edge 1332 other than the tip end periphery of the outlet of the discharge part 130.

Description

  The present invention relates to a ship net, and more particularly to an improvement in a ship net that can efficiently catch marine animals of small fish species such as shirasu and squid.

A fishing net fishery is known as a fishing method for efficiently catching small species of marine animals such as shirasu and squid.
In the fishing net fishery, two fishing boats called net boats pair to draw one net, and one fishing boat called a transport boat searches for a school of fish and guides the net boat and picks up the fish and transports it to the port. To do. In this way, it operates on three fishing boats.

The carrier decides when to replace the net by judging the condition of the shirasu and squid in the net along with the guidance of the net ship from the reaction status of the fish finder.
Since Shirasu and Ikanago have different migratory locations and water depths depending on the day's weather and the complex tidal currents of the sea, the experience of the captain of the carrier and the guidance of the net boat based on the can hold the key to the catch of the day It is said. In addition, since Shirasu and eelfish are often near the upper layer, fishing is increased by adjusting the water depth to draw a fishnet shallower.
As for the fishing boats in Osaka Bay and Harima Pass, “Ikanago” fishing is in operation until mid-April, and “Shirasu” fishing is carried out from mid-April to early June and from late September to early December.

  The boat net is composed of a sleeve net, a bag net (trunk net, fish catch), and a leopard net. The sleeve net is attached to the left and right sides of the bag net in the form of sleeves and plays a role in bringing the school of fish into the center and driving it into the bag net. Float ropes and floats are attached to the upper edge of the sleeve net, and a sash is attached to the lower edge. The size of the mesh of the bag net is finer toward the back. As an example, the thinnest mesh is a net of about 2 mm, and the length of the bag net is about 80 m. About 20m from the end of the bag net is called fishing, and it can be attached and detached with a chuck. A float is connected to the sleeve net through a rope, and the depth of the sleeve network can be adjusted by changing the length of the rope and the length of the rope. Both ships unfold while laying a leash at full speed, and after confirming that the fishing gear has submerged to a predetermined depth, start a seine net.

FIG. 8 simply shows an example of a ship net fishing method. The distance between the two boats in the seine is about 50m, and the seine time is about 45 minutes to 1 and a half hours, depending on the situation of the fish school, and the seine speed is about 2 knots.
In order to collect the shirasu and eelfish that have entered the net, the bag net is lifted up by the winch of the carrier ship without winding up the entire net, and the chuck of the fish catching section is opened and collected. After catching the catch, refill the bag net and continue the net.

In Shirasu fishing and squid fishing, because the target fish species are small, the nets of the fishnets are finer than other fishery. After all, maneuvering at high speed is extremely important in terms of economy and competition with other fishing boats, and the catch varies depending on how fast the boat can be navigated.
Although the size and length of the nets are different between Shirasu and Ikanago, the structure of the fish nets and the floats of the sleeve nets are the same. The whole fishing net is longer in the Shirasu fishing device, and its length may reach 500 meters.

Kobe Regional Marine Accident Tribunal "Kinki fishing methods and safe navigation"

  However, as a problem in the above-described conventional fish net, there is a problem of how to eliminate contamination of non-fishing objects such as jellyfish and marine debris. If jellyfish, marine debris, etc. are mixed into the net, the target of catch such as shirasu and squid will not be afraid of the net, and the net will become heavy and the speed of the net will be slowed down. In particular, in recent years, jellyfish and the like are often generated in large quantities, and it is questioned how to efficiently catch fishing targets while eliminating non-fishing targets.

Here, in the prior art, a mechanism of the discharge section, also called “jellyfish removal”, is used. FIG. 11 is a diagram illustrating a configuration example of a ship net provided with a discharge unit in the prior art. In order to make the structure of the discharge part easy to understand, it is shown in a transverse section and a longitudinal section.
As for the size of the mesh of the conventional “jellyfish-free” discharge part, the catch target can pass but the non-fish catch target cannot pass.

As shown in FIG. 11, the conventional “jellyfish removal” discharge portion has a shape that is first squeezed into a mortar shape in order to separate a fishing target and a non-fishing target. By narrowing down into a mortar shape, the target of fishing goes straight and goes through the net to the next stage of fish catching section, while the non-fishing target is collected in the center to separate the catching target from the non-fishing target. is there. The shape of the conventional “jellyfish-free” discharge part is squeezed into a mortar shape, then guided toward the side of the trunk net, and the outlet of the “jellyfish-free” discharge part is provided on the side of the trunk net. It is open. Non-fishing animals and unnecessary items are discharged from the open exit to the outside of the side of the trunk net. Since the ship net will continue to run continuously during the operation time when the ship is operated, if the opening of the discharge part for `` jellyfish removal '' is provided on the side of the trunk network, the ship network will advance to the ship operation. Along with this, non-fishing objects and unnecessary items that have entered from the entrance of the discharge section pass through the discharge section and are released one after another from the opening exit of the discharge section provided on the side surface of the trunk net.
However, the inventor Shuji Utsu, while producing fishnets for many years, realized that there was room for improvement in the conventional “jellyfish-free” discharge section due to the catch of the target fish.

  First, there is a problem that a catch omission occurs based on the shape of the conventional “jellyfish removal” discharge section. In order to separate the fishing target and the non-fishing target, it was simply squeezed into a mortar shape, and the fishing target was passed straight through, and only the non-fishing target was collected and separated in the central direction. If there are many non-fishing targets of floating animals such as jellyfish, deformation will occur due to standing up and collecting even in the jellyfish-free state, and the water flow in the fishnet will be disturbed and the fishnet and other parts of the fishnet It seems that there is a case where the separation of the fishing target and the non-fishing target is not sufficient due to the bending of the part. Perhaps the cause is that catches such as shirasu and eelfish follow the flow caused by the movement of non-catch targets such as jellyfish, pass through the discharge part, and escape from the exit of the discharge part on the side of the trunk. It is done.

  Second, there is a problem that fishing leakage occurs more than necessary from the open outlet of the conventional “jellyfish removal” discharge section. Because floating animals such as jellyfish have a great impact on catch, measures against floating animals such as jellyfish are an indispensable mechanism. However, the amount of floating animals such as jellyfish in the fishing ground varies greatly due to various factors such as the location, time, season, and tide flow of the fishing ground. For this reason, the floating amount of floating animals such as jellyfish is often small in the fishing ground during the maneuvering. However, since the outlet for the conventional “jellyfish-free” discharge part is open, it may become a hole through which shirasu, squid, etc. that are the target of catching out without floating animals such as jellyfish. There is also.

  Inventor Shuji Utsu, who has been producing fish nets for many years, has devised the shape and function of the discharge part for “Jellyfish”, and has come up with a good fishing net with few catches to catch.

  In view of the above problems, the present invention improves the shape of the discharge part for “jellyfish removal” and the structure of the exit, efficiently eliminates non-fishing targets such as jellyfish, and catches catches such as shirasu and squid. It is an object to provide a ship net that can prevent the above.

  In order to achieve the above object, the ship net of the present invention is provided between the sleeve net portion and the fish bag portion, and the size of the net is a finer net than the marine animal to be caught. In the portion, between the trunk inlet portion and the trunk outlet portion, a trunk inlet portion serving as a coupling portion with the sleeve net, a trunk outlet portion serving as a coupling portion with the fish bag portion, A trunk net and an inner bag formed in front of the trunk outlet, allowing the animals to be caught to pass therethrough and supplementing large non-fishing animals and unwanted objects, and a discharge outlet on the side of the trunk net A discharge portion that discharges from the discharge portion, and the shape of the discharge portion divides the opening circumference of the inlet of the discharge portion into a first arc close to the outlet of the discharge portion and a second arc other than that In addition, the net starting from the first arc is shaped so as to be concentrated near the tip of the outlet opening edge of the discharge portion. Are, is characterized in that said second network starting from the arc has a shape which is formed toward the entire opening edge than near the tip of the outlet of the discharge portion.

  As an example of the above configuration, the length of the first arc is approximately 1/5 to approximately 1/3 of the entire opening circumference of the inlet of the discharge portion, for example, approximately 1/4. The length near the tip of the outlet opening edge of the discharge part is adjusted to 1/10 or less of the entire opening circumference of the outlet of the discharge part. By adopting such a ratio, the shape of the discharge portion is such that the surface on the side where the outlet is provided is substantially straight toward the outlet, and the surface opposite to the outlet is drawn on the opening edge of the outlet while drawing a smooth curved surface. It becomes connected, and the efficiency of selecting the target for fishing and non-fishing is improved.

Here, the reason why the shape of the present invention improves the efficiency of selecting the fishing target and the non-fishing target as compared to the conventional mortar shape can be explained as follows.
In the case of a conventional mortar shape, the mortar part is generally narrowed at a constant angle, but the angle of the mortar cannot be so steep. This is because if the angle is steep, the resistance of the water flow becomes too great and the entire fish net becomes heavy. Therefore, it is necessary to make the angle somewhat gentle. However, if the mesh is at a gentle angle with respect to the water flow, it will be difficult for the target of catching shirasu and squid to pass through the mesh, and along the net of the discharge section. Tend to swim diagonally. Therefore, the state where the target for catching shirasu or squid and the target for non-fishing such as jellyfish are not well separated to the narrowest part of the mortar. Next, it is not possible to make a steep angle such that the path from the narrowest part of the mortar to the outlet of the discharge part is also bent. This is because if the angle is steep, the resistance of the water flow becomes too great and the entire fish net becomes heavy. For this reason, the path from the narrowest part of the mortar to the outlet of the discharge part must be at a somewhat gentle angle. If it becomes so, it will become difficult to pass through a net | network rather for the target of catch of Shirasu and eelfish, and the quantity discharged | emitted from an exit will remain large, without separating from non-fishing targets, such as a jellyfish, well.

On the other hand, in the case of the ship net according to the present invention, the shape of the discharge part is such that the surface on the side where the outlet is provided faces the outlet substantially straight, and the surface on the opposite side of the outlet draws a smooth curved surface while opening the outlet. It is connected to the edge and has a shape like a short angle of a cow. With such a shape, the side surface of the curved discharge part is not inclined at a constant angle, but is directed to the outlet while changing the angle. Even in locations, selection of fishing targets and non-fishing targets is performed, and the efficiency of selection is improved. In addition, there is no portion that suddenly hits the water flow so that the net is bent, and the resistance of the water flow does not increase.
As shown above, the shape of the present invention improves the efficiency of selecting a fishing target and a non-fishing target than the conventional mortar shape.

  Next, as a device to prevent catch leaks in situations where there are not many non-fishing targets such as jellyfish in the fishing ground, a structure with an opening / closing structure that can freely adjust the opening diameter at the outlet of the discharge section is used. Correspondingly, opening and closing of the outlet of the discharge part can be adjusted by an opening and closing structure. For example, if it is a chuck structure, it can be easily opened and closed from the outside, and in the situation where there are not many non-fishing targets such as jellyfish in the fishing ground, the outlet of the discharge part can be closed to prevent fishing leaks .

In addition, when unnecessary things, such as marine debris, are larger than expected, it may be difficult to discharge from the side. Therefore, a second opening / closing structure is provided that has an opening / closing portion whose maximum diameter is larger than the diameter of the outlet of the discharging portion and a diameter of the opening / closing portion can be freely adjusted in a part of the stomach of the discharging portion. It is preferable to have a provided structure.
Furthermore, when the outlet of the discharge part and the opening / closing part of the discharge part are continuously provided, and both the opening / closing structure of the discharge part and the second opening / closing structure of the opening / closing part are in an open state, both are integrated. It is also possible to have a structure that can have a large-diameter opening.
With the above configuration, even when non-fishing target animals and unnecessary items that cannot be discharged from the outlet of the discharge part enter, the fish catching part is removed by guiding to the trunk outlet part of the trunk without discharging from the side. Can be removed.

  As another contrivance, a tidal part where the mesh is coarser than the other part of the part of the side of the trunk is provided to reduce the resistance generated in the trunk part when sailing. A configuration is preferable. The resistance of the boat net in water can be reduced, and the speed of the boat can be improved.

The marine animals to be caught in the fishing net of the present invention can be shirasu or squid.
Although the fishnet of the present invention is different from the target fish species such as shirasu and squid, the economical marine organisms such as giant clams are sorted by size in the fish catching section without being expelled like jellyfish. It is convenient if possible. Therefore, in the above configuration, a fish type selection unit having a double structure by providing an inner bag in the fish bag portion is provided, and the fish type that does not pass through the mesh of the fish type selection unit is accumulated in the fish type selection unit. It is preferable that the fish species that pass through the mesh of the sorting unit be configured to accumulate in the fish collecting bag portion behind the fish type sorting unit.

  According to the ship net according to the present invention, it is possible to efficiently eliminate non-fishing targets such as jellyfish and prevent catching of fishing targets such as shirasu and squid in a simple structure. In addition, if the outlet of the discharge section has a structure with an opening and closing structure that allows the opening diameter to be freely adjusted, the outlet of the discharge section should be closed in situations where there are not many non-fishing targets such as jellyfish in the fishing ground. It is possible to prevent catching omissions.

  Hereinafter, embodiments of the ship net according to the present invention will be described. The present invention is not limited to these examples.

Hereinafter, a configuration example of a ship net according to the present invention will be described with reference to the drawings.
Unless otherwise noted, it will be explained as a fish net for Shirasu fishing and squid fishing.
FIG. 1 and FIG. 2 are diagrams illustrating a boat net according to the present invention according to a first embodiment.
1 is a plan view, and FIG. 2 is a right side view.

  As shown in FIG. 1 and FIG. 2, the boat net 100 of the present invention is configured to include a sleeve net portion 110, a trunk net portion 120, a jellyfish removing discharge portion 130, and a fish bag portion 140. The seine net is not shown.

  The sleeve net portion 110 is a net connected to a seine net drawn by a fishing boat. Originally, it is preferable to make the mesh finer than the shirasu to be caught. However, if the entire mesh after the sleeve net 110 is made fine, the resistance becomes so heavy that it may become impossible to maneuver. It is preferable to increase the speed of maneuvering by increasing the mesh size of 110 and reducing the resistance.

  The trunk net portion 120 is a net portion provided between the sleeve net portion 110 and the fish catching bag portion 140, and has a finer mesh size than the shirasu or squid that are to be caught. The trunk part 120 includes a trunk part inlet 121, a front part 122, a middle part 123, a rear part 124, a side surface tide part 125, a middle suspension 127, and a trunk part outlet part 129.

  The trunk entrance 121 is an entrance that is a connection with the sleeve network 110.

The front part 122 and the middle part 123 and the rear part 124 are nets forming the body part 120, and the distinction is for convenience.
In order to keep the resistance of the entire ship net 100 small, it is possible to make the mesh size of the front portion 122 relatively large so as to suppress the resistance, and make it fine from the middle portion 123 to the rear portion 124.

  The side tide portion 125 is a portion of the side surface of the trunk portion 120 where the mesh is a coarser mesh than the other portion of the mesh portion. To do. In this configuration example, it is provided on the side surface portion of the middle portion 123.

  The suspension 127 is a structure for lifting the fish catching unit 140 submerged in the sea to collect the shirasu collected in the fish catching unit 140 as appropriate. A jig to hook is attached.

  The trunk | drum exit part 129 is an exit used as a connection part with the fish-collecting bag part 140 mentioned later. As will be described later, it is located behind the jellyfish removal discharge section 130, and the jellyfish removal discharge section 130 separates the fishing target such as shirasu and squid and the non-fishing target such as jellyfish. The object passes through the trunk outlet 129 and is received by the fish bag portion 140.

The jellyfish removal discharge portion 130 is provided at the rear stage portion of the trunk portion 120 and before the trunk portion outlet portion 129, and is a discharge portion having a double structure by providing an inner bag in the trunk portion 120. is there. In this configuration example, it is provided at a part of the rear portion 124 of the trunk portion 120.
The mesh of the discharge unit 130 for removing the jellyfish is larger than the mesh of the trunk portion 120 and larger than Shirasu and Locust to be caught. A thing is a device which supplements and discharges from the side of body part 120.

  The jellyfish removing discharge section 130 includes a discharge section inlet opening 131, a discharge section trunk section 132, and a discharge section outlet opening 133.

  The shape and function of the jellyfish removing discharge unit 130 will be described later in detail, and the description of FIGS. 1 and 2 will be continued.

  The fish catching unit 140 is a part that captures and accumulates marine animals captured by the boat net 100. In this configuration example, a clam removal 141, a fish removal 142, and a fish roll 143 are provided. The whole fish catching part 140 has a structure that can be separated by a chuck or the like, and the carrier can pull up the middle suspension 127 with a hook or the like, remove the chuck of the fish catching 140 and lift only the fish catching part 140 and collect it. It is a mechanism that can.

  The giant clam catcher 141 is a fish type selection unit having a double structure by providing an inner bag in the bag part of the fish catching unit 140. Fish species that do not pass through this mesh are collected here, and fish species that pass through this mesh. Is a structure that accumulates in the bag portion of the fish catcher. In this configuration example, the size of the mesh may be set so that the shirasu passes but the shrimp does not pass. Note that floating objects such as jellyfish larger than the giant clam and marine unnecessary materials cannot pass through the jellyfish, and are discharged from the jellyfish removal outlet 128. It will be accumulated.

  The fish catcher 142 is located at the rear stage of the giant clam catcher 141, and is a portion where the fish species that have passed through the giant clam catcher 141 are finally collected. In this configuration example, shirasu, which is a fish species to be captured, is accumulated.

  The fish roll 143 is a portion that tightens the last stage of the fish catch 142. If the fish roll 143 can be opened and closed, the fish roll 143 can be opened on the transport ship to take out the shirasu.

Next, the shape and function of the jellyfish removing discharge unit 130 will be described in detail.
FIG. 3 is an enlarged view showing in detail the structure of the jellyfish removing discharge section 130, which is a plan view.

  The discharge portion inlet opening 131 is an inlet portion of the discharge portion 130 and is provided along the inner periphery of the trunk portion 120, and all the seawater passing through the trunk net 120 is once discharged from the discharge portion inlet opening 131. 130 will be accepted.

  The discharge part body 132 is a net provided between the discharge part inlet opening 131 and the discharge part outlet opening 133. As will be described later, the discharge part body 132 is made of a net such as shirasu or squid. It is the part that passes the target animals and captures and separates non-fishing targets such as jellyfish and marine debris. As will be described later, this separation can be performed over the entire surface of the discharge section body 132.

  The discharge portion outlet opening 133 is attached to the side surface so as to lead out of the trunk net portion 120, and shirasu and eelfish to be caught pass through the mesh of the discharge portion trunk portion 132 and enter the fish catching portion 140 described later. Although entering, non-fishing objects such as jellyfish and marine debris are led out of the trunk part 120 through the discharge part outlet opening 133 and discharged. The diameter of the opening may be about 2 m, for example.

  Here, the shape of the discharge unit 130 will be described. In this configuration example, the left side of the discharge portion 130 is provided substantially straight, and the right side of the discharge portion 130 is a curved surface that is smoothly bent to a large extent, such as a so-called cow short angle. It has a shape.

  The shape of the discharge part 130 is such that when the opening circumference of the inlet of the discharge part 130 is divided into a first arc close to the outlet of the discharge part 130 and a second arc other than the first arc, The starting net is formed so as to be concentrated near the tip of the outlet opening edge of the discharge part, and the net starting from the second arc is directed toward the entire opening edge other than the vicinity of the tip of the outlet of the discharging part. The shape is formed.

FIG. 4 is a diagram showing the shape of the discharge unit 130 in more detail.
As shown in FIG. 4, when the circumference of the discharge portion inlet opening 131 is divided into a first arc 1311 on the side close to the outlet opening 133 and a second arc 1312 other than the first arc 1311, The starting net is formed so as to be concentrated in the vicinity of the tip end 1331 of the opening edge of the discharge portion outlet 133, and the net starting from the second arc 1312 is formed on the entire opening edge 1332 other than the vicinity of the tip end 1331 of the discharging portion outlet 133. It is the shape currently formed.

  In this configuration example, the length of the first arc 1311 is substantially ¼ of the entire circumference of the opening at the entrance of the discharge portion. Further, the length of the vicinity of the front end 1331 of the opening edge of the outlet 133 of the discharge portion is 1/10 of the entire opening circumference of the outlet 133 of the discharge portion, for example, about 10 cm, and is concentrated in a dotted shape. Yes.

  FIG. 5 is a development view in which the shape of the three-dimensional discharge unit 130 shown in FIG. When the discharge part 130 is manufactured, it is sufficient to prepare such net pieces and sew them together.

  As shown in FIG. 5, there are 12 pieces of mesh pieces 130 (1) to 130 (12). In each mesh piece, the basic width is W, and the basic length is L. The upper end of each mesh piece 130 (1) to 130 (12) forms an inlet opening 131 of the discharge part, and the lower end forms an outlet opening 133 of the discharge part.

  Of the mesh pieces 130 (1) to 130 (12), the upper ends of the three pieces of the mesh pieces 130 (1), 130 (2), and 130 (3) form the first arc 1311 of the inlet opening 131 of the discharge portion. Is formed. That is, the length of the first arc 1311 is 3W.

The mesh pieces 130 (1), 130 (2), and 130 (3) are cut into a triangle from the upper end to the lower end, and the length of the lower end is concentrated in a substantially dot shape. The lower end concentrated in a substantially dot shape forms the vicinity 1331 of the opening edge of the outlet 133 of the discharge portion. That is, since this length is substantially point-like, it can be regarded as zero.
By sewing these three pieces of mesh pieces 130 (1), 130 (2), and 130 (3), the first arc 1311 (length 3 W) is sewn into a curved surface that is concentrated at one point. This curved surface forms the left side surface of the discharge portion 130 as will be described later.

  Next, for the eight pieces of mesh pieces 130 (4) to 130 (12), two types of mesh pieces of a rectangular type and a triangular type are alternately arranged. The rectangular mesh piece 130 is a rectangular piece having a width W and a length L, which is a rectangular piece 130 (net piece 130 (4), mesh piece 130 (6), mesh piece 130 (8), mesh piece 130. (10), mesh piece 130 (12)). The triangular mesh piece 130 has four pieces of net pieces 130 (net piece 130 (5), net piece 130 (7), net piece 130 ( 9) and the mesh piece 130 (11)).

  A second arc 1312 of the inlet opening 131 of the discharge portion is formed by the upper ends of these mesh pieces 130 (4) to 130 (12). That is, the length of the second arc 1312 is 8W.

Further, a circumference 1332 of the outlet opening 133 is formed by the lower ends of the mesh pieces 130 (4) to 130 (12). That is, the length of the circumference 1332 of the outlet opening 133 is 5W.
When the eight pieces 130 (4) to 130 (12) are stitched together, the second arc 1312 (length 8W) is sewn into a curved surface that becomes the circumference 1332 (length 5W) of the outlet opening 133. . This curved surface forms the right side surface of the discharge portion 130 as will be described later.

  When the curved surface in which the mesh pieces 130 (1) to 130 (3) are sewn is used as the left side surface and the curved surface in which the mesh pieces 130 (4) to 130 (12) are sewn up is used as the right side surface, it is as if the former is a cow. The inner surface of the short angle, the latter the shape of the outer surface of the cat short angle.

Next, the separation ability between the fishing target and the non-fishing target in the trunk part of the jellyfish removing discharge part 130 of the present invention and the trunk part of the conventional jellyfish removing discharge part will be described.
FIG. 6 is a diagram comparing the areas for performing the separation work of the fishing target and the non-fishing target in the trunk portion of the jellyfish removal discharge portion 130 of the present invention and the trunk portion of the conventional jellyfish removal discharge portion.

  As shown in FIG. 6 (a), of the trunk portion of the jellyfish removing discharge portion 130 of the present invention, the area where the fishing target and the non-fishing target are separated is the entire cross-sectional area of the rear portion of the trunk net 120. It is spreading. The area where the angle is shallow and the catch target is easy to move along the net body and the catch target and the non-fish target are difficult to pass through is the area S1 on the right side. The angle is deep and the catch target is easy to pass through the net body. A region where only the object is difficult to pass and the two are easily separated is a region S2. If it is this structure, since it reaches | attains S1 previously and moves to S2 after that, it can eventually isolate | separate a fishing target and a non-fishing target about the cross-sectional area S1 + S2 of the rear part of the trunk net 120 efficiently.

  On the other hand, as shown in FIG.6 (b), in the trunk | drum of the conventional discharge part for jellyfish removal, there exists a channel part leading to the exit from the bottom part of a mortar shape narrowed down and the mortar. The narrow mortar-shaped side portion has a deep angle, the fishing target is easy to pass through the net, only the non-fishing target is difficult to pass through, and the region where the two are easy to separate is the region S3, and the passage leading from the bottom of the mortar to the exit The portion has a shallow angle, and the catch target is an area S4 in which the catch target and the catch target are not easily passed along the net body. With this configuration, since S3 is reached first and then moves to S4, the only place where the entire cross-sectional area of the rear part of the trunk 120 can be efficiently separated is only the region S3. The region S4 is reached, but in the region S4, the fishing target is also likely to move along the net body, and there is a possibility that the region S4 may exit from the exit as it is. Therefore, after all, only the region S3 can be efficiently separated.

  By comparing FIG. 6 (a) and FIG. 6 (b), the shape of the discharge portion 130 of the jellyfish removing discharge portion 130 of the present invention separates the fishing target and the non-fishing target more efficiently than the conventional shape. be able to.

  As described above, according to the sailing net 100 according to the first embodiment, a simple structure can efficiently eliminate non-fishing targets such as jellyfish and prevent catching of catching targets such as shirasu and squid. it can.

  Example 2 is the same fishing net as in Example 1, but shows a configuration example provided with an opening / closing structure in the discharge part.

FIG. 7 is a diagram showing the discharge unit 130a in an easy-to-understand manner in the shipping net 100a according to the second embodiment.
As shown in FIG. 7, the shipping net 100a according to the second embodiment has a structure including an opening / closing structure 134a that can freely adjust the opening diameter at the outlet 133a of the discharge unit 130a. The opening / closing structure is not particularly limited, but here, the fastener structure of the chuck is used, and the diameter of the opening / closing structure 134a can be changed by moving the fastener fastener metal fitting from the outside.

  As described above, by providing the opening / closing structure 134a at the outlet 133a of the discharge unit 130a, the opening / closing diameter of the outlet 133a of the discharge unit 130a can be adjusted according to the situation of the fishing ground. If the diameter of the outlet 133a is 2 m, for example, the diameter of the outlet 133a can be freely adjusted from 0 cm to 2 m by providing the opening / closing structure 134a. For example, in the situation where there are not many non-fishing targets such as jellyfish in the fishing ground, if the outlet 133a of the discharge unit 130a is opened, even if there is a small amount of shirasu or squid that is the target of fishing, catching from this outlet 133a There is a risk of leakage. Therefore, if the open / close structure 134a is closed, catching leakage can be reliably prevented.

  Next, the opening / closing part 135a used when unnecessary items such as marine debris are larger than expected will be described.

  As shown in FIG. 7, in the shipping net 100a according to the second embodiment, the maximum diameter of a part of the discharge body trunk 132a of the discharge part 130a is larger than the diameter of the outlet 133a of the discharge part 130a. The structure includes an opening / closing part 135a. When unnecessary items such as marine debris are larger than expected, it may be difficult to discharge from the outlet 133a of the jellyfish removing discharge portion 130a. Therefore, in order to ensure a larger diameter than the outlet 133a of the discharge part 130a for removing the jellyfish, the maximum diameter of a part of the belly of the discharge part body 132a of the discharge part 130a is larger than the diameter of the outlet 133a of the discharge part 130a. A large opening / closing part 135a is provided. For example, when the diameter of the outlet 133a is 2 m, the opening / closing part 135a is about 2 m50 cm to 3 m.

  The opening / closing portion 135a is preferably provided with a second opening / closing structure 136a whose opening diameter can be freely adjusted. By providing the second opening / closing structure 136a, the diameter of the opening / closing portion 135a can be freely adjusted by opening / closing.

  In addition, if the opening / closing structure 134a of the outlet 133a and the second opening / closing structure 136a of the opening / closing part 135a are provided in succession, it is possible to open both of them at the same time to form a large integrated opening.

As the open / close state of the discharge unit 130a according to the second embodiment, there are the following four patterns.
The first pattern is a pattern in which both the opening / closing structure 134a of the outlet 133a and the second opening / closing structure 136a of the opening / closing part 135a are closed. For example, if there is little foreign matter such as jellyfish in the operating sea area, if the boat is operated in this first pattern, the target shirasu and eelfish will pass through the discharge part 130a as they are, without leaking the shirasu and eelfish. I can catch it. Further, if the side outlet 133a is closed, it becomes difficult for the shirasu and squid to escape from the side by mistake.

  In the second pattern, the opening / closing structure 134a of the outlet 133a is opened, and the second opening / closing structure 136a of the opening / closing part 135a is closed. For example, if there is a lot of foreign matter such as jellyfish in the operating sea area, if the ship is operated in this second pattern, the outlet 133a of the discharge part 130a is removed from the jellyfish, and the foreign matter such as jellyfish is expelled from the side and is subject to catch. Shirasu and eelfish can be led to the fish catching section 140a, and can be caught while selecting both.

  The third pattern is a pattern in which both the opening / closing structure 134a of the outlet 133a and the second opening / closing structure 136a of the opening / closing part 135a are opened. For example, when a large non-fishing target animal and an unnecessary object that cannot be expelled from the outlet 133a enter, if the second opening / closing structure 136a is operated to open the opening / closing part 135a, the non-fishing target animal and the unnecessary object are removed from the opening / closing part 135a. It is the structure which can be drawn out from the rear to the outlet opening 129a of the trunk 120a. In addition, since the fish catching part 140 can be cut off at the connecting part between the trunk net 120 and the fish catching part 140, if the non-fishing target animal and the unnecessary object can be led to the outlet opening part 129a of the trunk part 120a, it is large. Even if it exists, it can be taken out from the ship net 100a.

  The fourth pattern is a pattern in which the opening / closing structure 134a of the outlet 133a is closed and the second opening / closing structure 136a of the opening / closing part 135a is opened. This pattern is the same as the first pattern, only the difference between whether the opening / closing part 135a is closed or opened. For example, if there is little foreign matter such as jellyfish in the operating sea area, this fourth pattern Even if the boat is operated in a pattern, the target shirasu and squid will pass through the discharge part 130a as they are, so that they can be caught without leaking the shirasu and squid.

  As mentioned above, although the preferable embodiment in the structural example of the ship net of the present invention has been illustrated and described, it will be understood that various modifications can be made without departing from the technical scope of the present invention. .

  The boat net according to the present invention can be widely applied to a boat net for Shirasu fishing and squid fishing.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure (plan view) which shows the ship net | network for Shirasu fishing of this invention concerning Example 1. FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure (right side view) which shows the ship net for Shirasu fishing of this invention concerning Example 1. FIG. It is the figure which showed in detail the structure of the discharge part 130 for jellyfish removal. It is the figure which showed the shape of the discharge part 130 in more detail. It is a figure which shows the expanded view which expand | deployed the shape of the discharge part 130 in the plane more easily. It is the figure which compared the area which isolate | separates a fishing target and the non-fishing target in the trunk | drum of the discharge part 130 for jellyfish removal of this invention, and the trunk | drum of the conventional discharge part for jellyfish removal. It is the figure which showed clearly about the discharge part 130a among the shipping nets 100a concerning Example 2. FIG. It is the figure which shows simply the example of the ship maneuvering of the conventional boat net fishing method.

DESCRIPTION OF SYMBOLS 100 Ship net 110 Sleeve net part 120 Trunk net part 121 Trunk part inlet part 122 Front part 123 Middle part 124 Rear part 125 Side tide part 127 Suspension 129 Trunk part outlet part 130 Jellyfish discharge part 131 Discharge part inlet opening 132 Discharge Body trunk part 133 Discharge part outlet opening 134 Opening and closing structure 135 Opening and closing part 136 Second opening and closing structure 140 Fish catching part 141 Squid catch 142 Fish catching 143 Fish roll

Claims (9)

A fishing net for catching marine animals living in the sea or on the sea floor,
In the trunk net part which is provided between the sleeve net part and the fish bag part, and the size of the net is a finer mesh than the marine animal to be caught,
The trunk part inlet part used as the connection part with the said sleeve net, the trunk part outlet part used as the connection part with the said fish-collecting bag part, and the trunk | drum network between the said trunk part inlet part and the said trunk part outlet part Body,
A discharge part formed as an inner bag body in front of the trunk part outlet part, allowing a catching animal to pass therethrough and supplementing a large non-fishing target animal and unnecessary items from a discharge outlet on a side surface of the trunk part net body. Prepared,
When the shape of the discharge part divides the opening circumference of the inlet of the discharge part into a first arc close to the outlet of the discharge part and a second arc other than the first arc, The starting net is formed so as to be concentrated near the tip of the outlet opening edge of the discharge part, and the net starting from the second arc is directed toward the entire opening edge other than the vicinity of the tip of the outlet of the discharging part. A ship net characterized in that it is formed in a shape.   The length of the first arc is approximately ¼ of the entire opening circumference of the outlet of the discharge part, and the length near the tip of the outlet opening edge of the discharge part is the outlet of the discharge part. The ship net according to claim 1, which is 1/10 or less of the entire opening circumference.   The exit of the discharge part is provided with an opening / closing structure capable of freely adjusting the opening diameter thereof, and the opening / closing diameter of the outlet of the discharge part can be adjusted by the opening / closing structure according to the situation of the fishing ground. The listed ship net.   In the part of the belly of the net of the discharge part, the opening / closing part whose maximum diameter is larger than the diameter of the outlet of the discharge part, and a second opening / closing structure capable of freely adjusting the opening diameter of the opening / closing part, The ship according to any one of claims 1 to 3, wherein when a non-fishing target animal having a size that cannot be discharged from an outlet of the discharge part and an unnecessary object enter, the ship can be led to the trunk part of the trunk part. Subnet.   When the outlet of the discharge part and the opening / closing part of the discharge part are provided in succession, and both the opening / closing structure of the discharge part and the second opening / closing structure of the opening / closing part are in the open state, the large size of both The ship net according to claim 4, which can be an opening having a diameter.   Provided with a tide drainage part where the mesh is coarser than the other part of the part of the side surface of the trunk part, so that the resistance generated in the trunk part when diving is reduced A ship net according to any one of claims 1 to 5.   A fish type selection unit having a double structure with an inner bag provided in the fish bag portion is provided, and the fish type that does not pass through the mesh of the fish type selection unit is accumulated in the fish type selection unit, and the fish type selection unit The fish net passing through the mesh is configured to accumulate in the fish bag portion at the rear of the fish sorting section.   The ship net according to any one of claims 1 to 7, wherein the marine animal to be caught is a fish species including shirasu.   The ship net according to any one of claims 1 to 7, wherein the marine animal to be caught is a fish species including squid.

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