JP2009179313A - Method of towing pen for live fish - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of towing a pen for active fish, capable of rapidly towing a large-capacity pen to a fishing ground by using a small boat having poor facility, rapidly and safely developing the pen to accommodate a school of fish even on a wind-whipped sea, and conveying the large mass of live fish from the fishing ground to a fishing port without causing damage to the body of each of the live fish. <P>SOLUTION: The pen is loaded on a small boat and transferred to a fishing ground and developed at the fishing ground. Live fish captured in the fishing ground is accommodated in the pen 22, a working boat is laid alongside the upper front side of the pen 22, a shape retaining bar 38 for retaining the shape of the front side of the pen is attached on the front side of the pen, weights 44 for preventing "blow" of the front of the pen in towing are attached to the pen, and towing ropes 54 attached to a plurality of points of the shape retaining bar 38 are used to tow the pen 22 by a towing boat 56 from the fishing ground to the fishing port. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for towing a sacrificial fish containing live fish captured in a fishing ground from a fishing ground to a fishing port. The present invention also relates to a sacrifice used in the method.

Conventionally, various methods have been used to transport live fish caught in a fishing ground by a net (called “turning net” in the industry) or the like from a fishing ground to a fishing port in a living rod.
A typical method is to attach a large number of buoyant bodies to an iron frame assembled by welding galvanized steel pipes to form a cage, and form a cage by hanging a square cage net from the iron frame cage. Because the iron fence is heavy, this kind of sacrifice cannot be loaded or unloaded without using a large ship equipped with a crane. For this reason, when a crane cannot be used, it is necessary to tow a sacrificial vessel to a fishing ground several miles away from a fishing port by a towing boat or the like, which takes a lot of time.
Also, when fishing grounds are tempered (squeezed), the seine boats (called “turning boats”), work boats and steel fences are shaken violently by wind waves and wind pressure, so the steel fences and the ships There is a problem of collision, and there is a problem that a large risk and burden are imposed on the worker and the hull during the operation of transferring the fish from the fishing net to the sacrifice, and the operation time is significantly increased.

Another method of transporting live fish is to use a live fish transport ship with a built-in ginger. However, since the ginger built in the live fish transport ship has a small capacity, the live fish must be accommodated with a margin capable of preventing “slipping” (damage) of the fish body, and the transport cost becomes very high.
Japanese Laid-Open Patent Publication No. 2006-141349 discloses a sacrifice provided with a rectangular sacrifice frame 2 and an annular support frame 5. Since the sacrifice frame is only about 4 m long (see paragraph 0042), the capacity of this sacrifice is limited. If the length of the cage frame 2 and the diameter of the support frame 5 are increased in order to increase the capacity, the cage will be a large one that cannot be transported by a small boat without crane equipment. Japanese Laid-Open Patent Publication No. 2002-360112 discloses a sacrifice with a kite portion for preventing the volume of the sacrifice from being reduced due to a water flow during towing (referred to as “funare” in the industry). It is disclosed. Since these kite parts are made of canvas, the entire sacrificial ginger is very bulky when the ginger is folded. For this reason, there is an inconvenience that a large ship equipped with a crane has to be used for transporting to a fishing ground or deploying in a fishing ground. In addition, the action of the kite adds a large force to sink downward and sinks the floating body, and there is no stability in the horizontal direction. Utility Model Registration No. 3107116 discloses a cylindrical sacrifice having a diameter of about 20 to 50 m and a depth of 10 to 20 m. Such a large-diameter cylindrical sacrifice and a metal frame (iron frame) cannot be folded and transported to a fishing ground by a small boat.

  The purpose of the present invention is to use a small boat with poor facilities to quickly transport a large volume of fish from the fishing port to the fishing ground, and to deploy the fish safely and quickly even on high wind waves to accommodate the school of fish. Another object of the present invention is to provide a method and a sacrifice that can be transported from a fishing ground to a fishing port without causing damage to the fish body.

  The present invention provides a method for towing a cage containing live fish, and this method lays a work boat on the front side of the upper side of a cage made of a square net containing live fish captured in a fishing ground, A shape retaining rod for holding the shape of the front side of the sacrifice is attached to the front side of the sacrifice from the side of the work ship, and the front of the sacrifice is towed. Is attached to the sacrifice, and a tow rope is attached between the shape retaining rod and the work ship or other towed ship, and the work ship or towed It is characterized by towing a sacrifice from a fishing ground to a fishing port by a boat at a water speed of 3 knots or less.

  Preferably, the shape-retaining rod has a longitudinal rigidity capable of resisting a compressive force acting on the front side of the upper side of the sacrifice during towing, and has a flexibility capable of bending following a wave. This shape maintaining rod can be formed of a resin pipe whose inside is sealed.

  Preferably, the shape retaining rod is composed of a plurality of rod pieces divided in the longitudinal direction and provided with joints, and each rod piece is separated in advance and mounted on the work ship, and these rod pieces are the sacrificial ones. When attached to the front side, they are connected together by a joint.

Sacrificial means for preventing drowning consists of a plurality of weights that settle at the front of the bottom of the sacrifice, and each weight is suspended from a buoyant body that overcomes the load, and each buoyancy body is shaped. It is connected to the holding rod.
Preferably, the plurality of weights and the buoyancy body are mounted on the work boat in advance, and are inserted one by one from the work boat after the shape-retaining rod is attached to the front side of the sacrifice.

  In another embodiment, the squeezing prevention means comprises a towing rope connected to the bottom front side of the sacrifice.

  In another aspect of the present invention, a method for towing a cage that contains live fish includes a work boat equipped with a folded net cage on a part of a net that has captured live fish by a net boat at a fishing ground. Horizontally, the rear side of the upper side of the folded cage mounted on the work boat is connected to the part of the winding net, and the rear side of the combined cage and the part of the winding net are sunk with a weight. The live fish in the net is moved to the cage by pulling the hoist into the cage while feeding the cage from the work boat, and the shape holding rod for holding the shape of the front side of the cage is sacrificed from the side of the work boat. A means for preventing the front side of the sacrifice from being “swollen” during towing of the sacrifice is attached to the sacrifice, and a tow rope is attached to the shape holding rod from the side of the work ship. From the side of the ship and the rear side of the sacrifice Release the connection with the part of the purse and collect the weight on the purse and tow the sacrifice from the fishing ground to the fishing port at a water speed of 3 knots or less by the work boat or other towing vessel. It is characterized by.

  In yet another aspect of the present invention, a method for towing a live fish cage includes laying a work boat on the front side of the top side of a fish cage made of a square net containing live fish captured in a fishing ground, and said front side of the fish cage. Is fixed to the work ship, and a means for preventing the front of the sacrificial vessel from being “blurred” is attached to the sacrificial ship, and a tow rope is attached between the work ship and the towed ship. The towed vessel is towed at a water speed of 3 knots or less from the fishing ground to the fishing port.

  In another aspect of the present invention, the present invention provides a sacrifice used in the towing method, and the sacrifice has a shape holding rod for holding the shape of the front side of the upper side of the sacrifice when towing the sacrifice. , And means for preventing “blowing” of the front surface when the sacrifice is towed.

  The above-described features and effects of the present invention as well as other features and effects will be further clarified as the following examples are described.

With reference to the drawings, a method for towing a live fish cage according to the present invention and a fish cage according to the present invention used therein will be described.
Referring to FIG. 1, FIG. 1 (A) shows a case where a winding net (hereinafter referred to as a lathe) is wound and a purse boat (hereinafter referred to as a net or a net) 12 starts a so-called “circular winding” operation. Indicates. When the turning boat 12 winds up the wire 18 passed through the ring 16 of the turning net 10 while being run by the first auxiliary vessel 14, the bottom of the turning net 10 is closed as shown in FIG. Be trapped.
Next, the work boat 20 lies side by side on the portion of the lathe 10 close to the bow of the lathe boat 12 (FIG. 1B). The work boat 20 is preinstalled with a sacrifice 22 of the present invention, which will be described later, particularly shown in FIG.

As shown in FIG. 2 (B), when the lathe 10 is further wound up from the stern lifting machine of the trawler ship 12 while the work ship 20 is being rolled by the second auxiliary ship 24 as shown in FIG. 2 (A). In addition, the work boat 20 comes to the opposite side of the net boat 12 with respect to the fish catch 26 of the net 10.
At this position, the worker on the work boat 20 refers to the rear side 28 of the upper side of the folded cage 22 mounted on the work boat 20 (the front and rear sides of the sacrifice cage refer to the front and rear in the traveling direction of the sacrifice cage). ) With a small rope (not shown) on a part of the lathe 10 to connect the rear side 28 of the upper side of the sacrifice 22 and a part of the winding net. Then, the weight 34 shown in FIG.
Next, the folded sacrificial body 22 on the work boat 20 is shown while pulling the work boat 20 to the right in FIG. 2B by the first auxiliary boat 14 and to the left by the second auxiliary boat 24. Slowly drop into the sea as shown in 2 (B).

FIG. 3 (A) shows that the sacrifice 22 has been completely dropped into the sea and deployed. As can be seen from the figure, the cage 22 is formed of a square fishing net. As is well known, a large number of floats 30 are attached to the upper side of the sacrifice 22 to give buoyancy to the sacrifice 22, and the bottom 32 of the sacrifice square is a sunk cord with a weight (not shown). It is formed, and the side surface and bottom surface of the sacrifice are suspended from the float 30. As a non-limiting example, the sacrifice 22 has, for example, a length of 15 m on each of the upper four sides and a depth of 10 m, and a stationary volume of 2,000 cubic meters or more.
As described above, according to the present invention, the sacrifice 22 can be mounted on the work boat 20 and other small boats in a folded state and can be quickly transported to the fishing ground. It can be easily expanded to a volume of 2,000 cubic meters or more without using mechanical equipment.

As shown in FIG. 3 (B), which is an enlarged view of the portion in the circle of FIG. 3 (A), due to the action of the weight 34, the crossing portion of the rear side 28 of the sacrifice 22 and the lathe 10 is the sea surface. It sinks down and allows the school of fish to move from the fish catching portion 26 of the lathe net 10 to the sacrifice 22.
Accordingly, as shown in FIG. 4, when the fish catching portion 26 of the lathe net 10 is further rolled up, the school of fish is transferred from the fish catching portion 26 of the lathe net 10 to the sacrifice 22. Eventually, the turning net 10 and the weight 34 are collected on the turning net 12 (FIG. 4).

When all of the school of fish has been transferred to the sacrifice 22, the front side 36 of the upper side of the sacrifice 22 is held on the work boat 20 as shown in FIG. In this state, the shape holding bar 38 is attached to the front side 36 of the sacrifice 22.
The shape-retaining rod 38 has a longitudinal rigidity capable of resisting a compressive force acting on the front side 36 of the sacrifice when the sacrifice 22 is towed, and has a flexibility capable of bending following the waves. The shape holding rod 38 can be formed of a resin pipe whose inside is sealed so that water does not enter. More inexpensively, the shape-retaining rod 38 can be formed by coating Miso bamboo with fiber reinforced resin (FRP).
In order to facilitate transportation and handling, the shape-retaining rod 38 can be constituted by, for example, dividing a plurality of (for example, five) pipe segments 40 having a length of about 3 m and assembling them together. For this reason, each piece 40 is provided with a pipe joint 42. As shown in FIG. 5 (A), the shape retaining rods 38 can be assembled by integrally connecting the pieces 40 distributed in the work boat 20 with the pipe joints 42.
Since the rod segment 40 of the shape-retaining rod 38 formed of a resin pipe is lightweight and easy to handle, there is no risk of damaging it even if it comes into contact with the human body or hull of a worker. The shape-retaining rod 38 can be assembled safely and quickly.

If the shape-retaining rods 38 assembled in this way are tied to the upper front side 36 of the sacrifice using a rope (FIG. 5B), a plurality of weights 44 for preventing the sacrifice of the sacrifice is attached to the rope. As shown in FIG. 6A, the ones connected to the buoyant body 46 are put into the sea one by one. Each weight 44 has a weight of 20 to 30 kg, for example, and each buoyancy body 46 has a volume sufficient to generate buoyancy that overcomes the weight of the weight 44. The upper end of the rope from the buoyancy body 46 is tied to the shape retaining rod 38.
For example, 20 to 25 weights 44 for preventing “blowing” can be used. For example, when the weight of the weight 44 is 28 kg and the total number is 25, the total weight of the weight 44 is 700 kg. However, as shown in FIG. It is possible for an operator to easily and quickly carry it into the sea without using a crane. Further, since the weight 44 is inserted on the work boat 20, it can be safely performed even if the wind wave is high.

  When all the weights 44 are inserted, the shape is maintained so that the traction force from the towing vessel acts as evenly as possible on each part of the shape holding rod 38 so that the shape holding rod 38 is held as straight as possible during towing. Attach tow rope to multiple points on bar 38. First, as shown in FIG. 6B, the free ends of, for example, three first tow ropes 48 are attached to the shape maintaining rod 38 at equal intervals, and the work ship 20 is gradually sacrificed by the second auxiliary ship 24. The first tow rope 48 is stretched in an inverted V-shape by moving away from it. When there are three first tow ropes 48, as shown in FIG. 7, these three first tow ropes 48 are further connected to two second tow ropes 50 and stretched in an inverted V shape, These two second tow ropes 50 are further combined with one third tow rope 52, the distal end of the main tow rope 54 is connected to the third tow rope 52, and the proximal end of the main tow rope 54 is connected to the third tow rope 52. It can be connected to a towed ship 56 (of course, the work ship 20 may be used as a towed ship).

In parallel with the preparation for towing performed on the work ship 20, the weight 34 is collected on the turning ship 12 on the side of the turning ship 12, and the turning rope between the rear side 28 of the sacrifice 22 and the turning net 10 is removed. The sacrifice 22 is released from the ship 12, and the towing of the sacrifice 22 by the tow ship 56 is started as shown in FIG. Towing from the fishing ground to the fishing port is performed at a water speed of 3 knots or less, preferably 2 knots or less, more preferably 1.5 knots or less.
During towing, as shown in FIG. 7 (B), the sacrifice 22 is “swept” backward by the water flow acting on the front surface of the sacrifice 22, but the weight 44 that has reached the bottom of the bottom of the sacrifice 22 is Suppress him. If the volume of the cage 22 at rest is 2,000 cubic meters, even if the volume of the cage 22 at the time of towing is reduced by 50% due to “flooding” (deformation due to water flow), the volume of 1,000 cubic meters is still present. Since the fish remains, the school of fish can swim in the cage 22 with a sufficient margin. Therefore, damage such as threading and stress of the fish body can be avoided.

  In another embodiment of the method of the present invention, the sacrifice 22 can be towed together with the work ship 20 to the fishing port by the towing vessel without separating the work ship 20 from the sacrifice 22. In this case, as shown in FIG. 4, with the front side 36 of the upper side of the sacrifice 22 fixed to the work boat 20, the weight 44 for preventing “swelling” is connected to the buoyant body 46 with a rope. Then, the work vessel 20 is towed laterally by a towing vessel or an auxiliary vessel, and the sacrifice vessel 22 is towed to the fishing port together with the work vessel 20. In this embodiment, the work boat 20 also serves as a means for maintaining the shape of the front side 36 of the sacrifice.

  In another embodiment (not shown), a tow rope connected to the front side of the bottom of the sacrifice can be used as an anti-scoring means in place of the weight attached to the front of the bottom of the sacrifice.

  Although specific embodiments of the present invention have been illustrated and described above, the present invention is not limited to these embodiments, and various changes and modifications can be made. Such embodiments are also within the scope of the present invention. For example, any small ship can be used as the aforementioned work ship, towing ship, and auxiliary ship. The number of tow ropes and how to hang them can be changed as appropriate.

FIG. 1A is a schematic perspective view showing the “circular winding” operation of the turning net, and FIG. 1B is a schematic perspective view showing the turning net after the “circular winding”. FIG. 2 (A) is a schematic perspective view showing a place where a work boat is laid sideways on the lathe, and FIG. 2 (B) is a schematic perspective view showing a place where a sacrifice is connected to the lathe. FIG. 3 (A) is a schematic perspective view showing a state where the sacrifice is developed, and FIG. 3 (B) is an enlarged view of a portion in a circle of FIG. 3 (A). It is a typical perspective view which shows the place which moved the fish school to the sacrifice 22 and collect | recovered the turning net | network on the trawler boat. FIGS. 5A and 5B are schematic plan views showing a state in which a buoyancy body tied to a shape-retaining rod and a weight is attached to the front side of the sacrifice. Fig. 6 (A) is a schematic perspective view showing that a buoyant body and a weight tied with a rope are dropped into the sea one by one, and Fig. 6 (B) shows a place where a tow rope is attached to a shape retaining rod. It is a typical perspective view shown. FIG. 7 (A) is a schematic perspective view showing a state where preparation for towing of the sacrifice is completed, and FIG. 7 (B) is a schematic perspective view of the sacrifice during towing.

Explanation of symbols

10: Turned net
12: Swivel boat (wind net, net)
20: Work boat 22: Sacrificial bowl 36: Front side of sacrificial cage 38: Shape retaining rod 40: Rod segment of shape retaining rod 44: Weight 46: Buoyant body 56: Towing ship Inventor Shuji Tokuhiro Patent applicant Tokuhiro Limited Company Attorney Hiroshi Ito

Claims (10)

A work ship is laid on the front side of the upper side of the ginger made of a square net containing live fish captured at the fishing ground, and a shape holding rod for holding the shape of the front side of the ginger is sacrificed from the side of the work ship. And a means for preventing the front side of the sacrificial to “blow out” when the sacrificial tow is attached to the sacrificial cage, and a tow rope is provided between the shape retaining rod and the work ship or another towed ship. A method for towing live fish sacrificial, characterized in that the sacrificial tow is towed from a fishing ground to a fishing port at a water speed of 3 knots or less by the attachment of the work boat or towing boat. The shape retaining rod has a longitudinal rigidity capable of resisting a compressive force acting on the front side of the upper side of the sacrifice during towing, and has a flexibility capable of bending following a wave. A method according to claim 1. 3. The method according to claim 2, wherein the shape-retaining rod is a resin pipe sealed inside or the like. The shape holding rod is composed of a plurality of rod pieces divided in the longitudinal direction and provided with joints, each of which is separated in advance and mounted on a work boat, and these rod pieces are attached to the front side of the sacrifice. A method according to any one of claims 1 to 3, characterized in that they are connected together by a joint for mounting. The "swelling" prevention means is composed of a plurality of weights acting on the front part of the bottom of the sacrifice, and each weight is suspended from a buoyancy body having a buoyancy that overcomes the load, and each buoyancy body maintains the shape. 5. The method according to claim 1, wherein the method is connected to a bar. 6. The plurality of weights and buoyancy bodies are mounted in advance on a work boat, and are inserted one by one from the work boat after attaching a shape-retaining rod to the front side of the sacrifice. A method based on either. 5. A method according to any one of claims 1 to 4, characterized in that said "swelling" prevention means comprises a towing rope connected to the bottom front of the sacrifice. A work boat equipped with a folded net cage is placed from the outside on a part of the sewn net that captures live fish with a net boat at the fishing ground, and the rear side of the upper side of the folded cage mounted on the work boat is By joining the part of the purse net, sinking the rear side of the joined cage and the part of the seine net with a weight, and rolling up the seine net on the purse ship while feeding the sacrifice from the work ship The live fish in the purse is transferred to the sacrifice, and a shape-retaining rod is attached to the front side of the sacrifice from the side of the work ship to hold the shape of the front side of the sacrifice. Attach means to prevent drowning to the cage, attach a tow rope to the shape retaining rod from the side of the work ship, and connect the rear side of the cage to the part of the seine net from the side of the trawler. Release the connection and put the weight on the purse Recovered, live fish containing cages method towing, characterized in that the cage by the work boats or other towing vessel towing the following to water velocity 3 knots fishing grounds to fishing port. A work boat is laid on the front side of the top of the cage made of a square net containing live fish captured at the fishing ground, and the front side of the cage is fixed to the work boat. Is attached to the sacrifice, and a tow rope is attached between the work vessel and the towed vessel, and the work vessel that has laid the sacrifice by the towed vessel at a water speed of 3 knots or less from the fishing ground to the fishing port. A towing method for live fish with live fish characterized by towing. A sacrifice used in the method according to any one of claims 1 to 8, wherein a shape-retaining rod for holding the shape of the front side of the upper side of the sacrifice when the sacrifice is towed, and a "fload" on the front surface when the sacrifice is towed And a means for preventing the sacrifice.

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