JP2010207106A - Method for recovering middle-layer floating fish bank and metal fitting for recovery, usable therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recovering method by which the whole constituent members of a middle-layer floating fish bank can readily and precisely be pulled up while hardly being affected by the operation condition such as a water depth of an installation location, and to provide a metal fitting for recovery, usable for the method. <P>SOLUTION: The method for recovering the middle-layer floating fish bank 1 includes fixing a work ship 10 to the middle-layer floating fish bank 1 of which the bank body is moored to a prescribed region under sea through a mooring rope bound to an anchor 2 installed on the sea bottom by engaging the tip part of a guide rope 11 hung down from the work ship 10 to the fish bank body by moving the tip part, lowering an unmanned submersible 13 having a metal fitting 20 for recovery, bound to one terminal side of a recovery rope 15 sent out from the work ship 10 and detachably attached to the front side thereof by utilizing the guide rope 11 to the vicinity of the bank body, binding the metal fitting 20 for the recovery to the mooring rope by operating the unmanned submersible 13, pulling up the unmanned submersible 13, and winding up the recovering rope 15 to pull up the middle-layer floating fish bank 1 as it is. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for recovering a middle-floor floating fish reef that is anchored in a floating state in a middle-layer area in the sea via a mooring line with respect to an anchor set on the seabed.

  As this kind of middle-floating floating reef, the fish reef body was formed in a columnar shape so that the fish collection effect could be obtained over a wide depth region, and this fish reef body also served as a floating body as a sealed structure with fiber reinforced plastic pipe or steel pipe Structures are known. A structure in which a plurality of annular frames are arranged vertically and a fish reef body is constructed by stretching a net around the outer periphery of the annular frame, and a buoy-like floating body is provided inside the fish reef body. Is also known. Such middle-floating floating reefs are installed using anchors and mooring lines so that the reef body is located in an area of about 20 to 300 m below the sea level. However, when the life of the reef body has passed, For reasons such as countermeasures, withdrawal and recovery from the sea is required.

Conventionally, in the method of collecting middle-floor floating reefs, when the water depth at the installation site is not so deep, divers dive, cut the mooring lines, and lift the fish reef body floating on the sea surface onto the work boat. On the other hand, in a deep-water type middle-floor floating fish reef, since diving work by divers is difficult, a system has been proposed in which the fish reef body is detached from the anchor by a signal from a work boat (Patent Document 1). That is, in this system, the reef body is placed on the sea surface when necessary by interposing a separation device that operates with an ultrasonic signal at a position close to the anchor of the mooring line that connects the reef body and the anchor set on the seabed. It will be raised.

Utility Model Registration No. 3101433

  In the above prior art, although there is a difference between humans and machines, the mooring lines and anchors below the position where any method is divided are left in the sea as they are. For this reason, these members left close to the seabed may hinder fishermen's operations, and there has been a strong demand for improvement.

The present invention has been made in view of the problems of these prior arts, is not easily influenced by work conditions such as the water depth of the installation location, and a recovery method that can easily and reliably lift the entire middle-floating reef from the sea, The object is to provide a metal fitting for recovery used in this method.

In order to solve the above-described problems of the prior art, in the middle-floor floating fish reef recovery method according to claim 1 of the present application, the fish reef body floats in a predetermined area below the sea surface via a mooring line coupled to an anchor set on the seabed. The mid-floating reef that is moored in the state is fixed at the appropriate position of the fish reef body while moving the tip side of the guide rope suspended from the work boat, and then the recovery rope that is drawn out from the work boat An unmanned submersible with a detachable attachment fitting to be attached to one end of the reef is suspended near the fish reef body using the guide rope, and the unmanned diving machine is operated to attach the collection fitting to the fish reef body. The technical means of separating the recovery metal fitting and the unmanned submersible after being coupled to the mooring line below the unmanned submarine, lifting the unmanned submersible, and then winding up the recovery line on a work boat to lift the middle-floating fish reef. Adopted.

  Furthermore, in the method for recovering a middle-floor floating reef according to claim 1, after the metal fitting for recovery is coupled to the mooring line, a buoy is attached to the other end side of the recovery line and left on the sea surface. With the buoy as a mark, the other end of the recovery line is lifted onto the ship, and this is rolled up to lift the middle-floating fish reef (Claim 2). It is also possible to adopt a configuration (claim 3) in which the guide rope is lifted by releasing the latched state with respect to the main body.

Moreover, the recovery metal fitting according to claim 4 of the present application is used in the method for recovering a middle-floating fish reef according to claims 1 to 3, and the mooring line is moved from the opening on the outer peripheral side to the inner receiving portion. A technical means is adopted in which a guide body made of a bar-like member having buoyancy is arranged in an approximately V-shape in plan view so as to open outward from the opening in the metal fitting body that can be received.

The following effects can be obtained by adopting the above-described configuration in the method for recovering a middle-floor floating fish reef according to the present invention and the metal fitting for recovery used therefor.
(1) One end side of the recovery rope is connected to the mooring line connecting the fish reef body and the anchor, and the other end side of the recovery rope is rolled up on the work ship, so that those constituent members are integrally connected. Since the whole middle-floor floating fish reef is lifted as it is, nothing remains in the sea after recovery.
(2) The connection work between the retrieval line and the mooring line is that the work boat wraps around the top of the fish reef body, so that the hook on the tip side of the guide line suspended from the work ship is hooked to the fish reef body. After that, the unmanned submersible suspended from the work boat using this guide line as a guide is moved to the vicinity of the main body of the reef and connected to the mooring line via the recovery bracket attached to the unmanned submersible, so the diver can dive. It can also be applied to middle-floor floating fish reefs installed at such deep water depths.
(3) Since the unmanned submersible suspends the unmanned submersible along the guide line that connects the marine work boat and the fish reef body, the unmanned submersible suspends the unmanned submersible from the unmanned submersible. It is possible to move an unmanned submersible that has been reduced in operability due to the addition of the This can be easily performed by the guide member of the metal fitting.
(4) After coupling the recovery bracket to the mooring line, attach a buoy to the other end of the recovery line and leave it on the surface of the sea. Another work ship uses the buoy as a mark to place the other end of the recovery line on the ship. For example, if the recovery line is connected to the mooring line, the work will be performed on a small ship with a small turn, and the anchors that are heavy objects will not be separated. By taking up the work of lifting the entire floating reef using a large carrier, it is possible to shorten the work time of the entire collection work, which is effective in reducing the risk of work suspension due to sudden changes in the weather. is there.
(5) After the recovery metal fitting is coupled to the mooring line, if the guide line is recovered by releasing the hooked state of the guide line to the fish reef body, it becomes an obstacle when the recovery line is rolled up. Since nothing is lost, the winding operation can be performed more smoothly.
(6) Since the recovery metal fitting is provided with a guide body made of a material having a buoyancy that offsets its mass in a part of the metal fitting body that is responsible for coupling the mooring cable and the recovery cable, Even when this is attached to the front, it is possible to minimize fluctuations in the center of gravity position of the unmanned submersible and to prevent deterioration in operability. Furthermore, since the guide body is open in a V shape in plan view, the guide body can be easily engaged with the mooring line standing upright from the anchor, and the mooring line is reliably guided to the housing part of the metal fitting body. Can do.

It is explanatory drawing which shows the operation | work which latches the guide rope hung in the sea on a fish reef main body in the collection | recovery method of the middle-floating fish reef which concerns on this invention. It is explanatory drawing which shows the attachment operation | work of the collection | recovery rope by an unmanned submersible. It is a top view of the metal fitting for collection concerning the present invention. (A), (b) is the front view and top view of an unmanned diving machine of the state where the recovery metal fitting concerning the present invention was attached, respectively. It is explanatory drawing which shows the state after separating the unmanned submersible from the metal fitting for recovery, after connecting one end side of a recovery rope to the mooring rope of a middle-floating fish reef. It is explanatory drawing which shows the state which removed the guide rope from the fish reef main body, and was pulled up on board. It is explanatory drawing which shows the state which attached the buoy to the other end side of the collection | recovery line. It is explanatory drawing which shows the operation | work which lifts a middle-floating fish reef on board with a trolley.

The present invention uses a guide rope and a dedicated recovery bracket to improve the operability of the unmanned submersible in the recovery of a middle-floor floating fish reef installed in the sea. By coupling to the mooring line, there is an advantage that all the components of the middle-floor floating reef including anchors, which has been difficult until now, can be lifted on the ship. Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the embodiments, and various modifications can be made within the technical idea of the present invention.

  In the method for collecting a middle-floating fish reef according to the present invention, as a first step, as shown in FIG. 1, a guide rope 11 is suspended from the work boat 10 in the sea, and in this state, the work boat 10 moves over the middle-floating fish reef 1. A circuit is performed in which the hook 12 attached to the distal end side of the guide rope 11 is hooked on the fish reef body 3 of the middle-floating fish reef 1. The middle-floor floating fish reef 1 shown in the drawing to be collected is an example, and includes an anchor 2 installed on the seabed, a hollow cylindrical fish reef body 3 having buoyancy, and a mooring line 4 connecting them. The reef body 3 is installed so as to be localized at a predetermined depth below the sea surface. The member indicated by 5 in the figure is a secondary mooring line, which is used to stably connect the fish reef body 3 to the thick mooring line 4 (main mooring line). A plurality of thin cables are provided between the mooring cable 4 and the fish reef body 3. In this fish reef body 3, a large number of floating bodies made of hollow spheres for generating sufficient buoyancy are accommodated in the upper part of the hollow part of the cage-like frame made of fiber reinforced plastic, and weights are placed on the lower side. It is provided and is designed to float upright against static seawater due to the balance between the two. In this case, since the fish reef body 3 is formed in a bowl shape, the hook 12 on the tip side of the guide rope 11 suspended in the sea is accompanied by a great difficulty even when the water depth of the installation place is deep. Instead, the fish reef body 3 and the work boat 10 are connected to each other by being hooked in any of a large number of gaps opened on the outer peripheral surface of the bowl-shaped frame.

  When the guide rope 11 is hooked on the fish reef body 3 by the above work, as shown in FIG. 2, the anchor 2 of the middle-floating fish reef 1 becomes an anchor and the work ship 10 is fixed. To unload the unmanned submersible 13 into the sea. In addition to the control cable 14, one end side of the recovery cable 15 is connected to the unmanned diving machine 13 through a recovery metal fitting 20 which will be described later, and the recovery cable 15 and the like are fed out from the work ship 10 along with the diving. Further, a guide ring 16 is provided at an intermediate portion of the control cable 14 for operating the unmanned submersible machine 13, and the guide rope 11 passes through the inside thereof. Accordingly, the unmanned diving machine 13 moves downward along the guide rope 11 and can reliably approach the fish reef body 3 in a short time.

  FIG. 3 is a plan view of the recovery metal fitting according to the present invention. The illustrated recovery metal fitting 20 is provided with a gear-like stopper member 23 that can be elastically opened and closed via a spring inside an opening 22 of a metal fitting body 21 formed in a substantially C shape in plan view. The back side of the stopper member 23 serves as a housing portion 24 for the mooring cable 4. Further, two rod-shaped guide bodies 25 are arranged in a substantially V shape on the outer peripheral surface of the opening 22 so as to open outward. The guide body 25 has an effect of preventing an extreme balance change (inclination) due to the mass of the metal fitting body 21 being added to the front side of the unmanned submersible 13 by its buoyancy and maintaining operability. Specifically, a material having a material and dimensions that generate sufficient buoyancy in the sea, such as a hollow plastic pipe sealed at both ends or a foamed plastic rod, is used. The length of the guide body 25 is preferably about 50 to 100 cm that does not impair the operability of the unmanned submersible 13. Further, a U-shaped hook portion 26 for connecting the recovery cable 15 is provided on the outer peripheral surface of the metal fitting body 21.

  4 (a) and 4 (b) are a front view and a plan view of the unmanned submersible 13 with the recovery metal fitting 20 according to the present invention shown in FIG. 3 attached thereto. The recovery metal fitting 20 is installed on the front side of the unmanned diving machine 13 so that the guide body 25 is substantially V-shaped in a horizontal state, and is attached and detached by a signal from the work ship 10 via the control cable 14 of the unmanned diving machine 13. Installed as possible. Although not shown, one end side of the recovery line 15 is connected to the hook portion 26 of the recovery metal fitting 20. The recovery metal fitting 20 is designed in consideration of the mass of the target middle-floating fish reef 1, and generally has a strength of about 10 t. If such a metal fitting body 21 is attached in front of the unmanned diving machine 13, the small unmanned diving machine 13 is tilted too far forward, making it difficult to control the posture and making it impossible to operate. However, since the guide body 25 having sufficient buoyancy is provided in the recovery metal fitting 20, it can be effectively offset and the small unmanned diving machine 13 can be applied.

  FIG. 5 shows a state in which the unmanned diving machine 13 is lifted onto the work boat 10 after the recovery metal fitting 20 is coupled to the mooring cable 4 by the unmanned diving machine 13. The coupling work of the recovery metal fitting 20 to the mooring line 4 is performed by inserting the unmanned submersible 13 into the substantially V-shaped guide body 25 provided in front of the unmanned submersible 13 with respect to the mooring line 4 standing upright from the anchor 3. In this state, it is further moved in the horizontal direction so that the stopper member 23 is opened and accommodated in the accommodating portion 24 at the back. If the opening / closing operation of the stopper member 23 is performed by an operation on the unmanned diving machine 13 side instead of the spring, the unmanned diving machine 13 with smaller propulsive force can be used.

  FIG. 6 shows a state in which the guide rope 11 is lifted onto the work boat 10 after the connection of the recovery rope 15 to the intermediate floating fish reef 1 is completed. In this case, in order to disengage the guide rope 11 hung on the fish reef body 3, for example, a separating device is interposed at the base of the hook 12, and it is operated by an ultrasonic signal from the work ship 10. Also good. The guide rope 11 is detached and lifted so that it does not interfere with the winding work when the middle-floating fish reef 1 is lifted. Lifting work may be performed.

FIG. 7 shows a state in which the other end side of the recovery rope 15 is cut off from the work boat 10 and a buoy 17 as a mark is attached to the end portion. In this case, the work boat 10 does not lift the middle-floating fish reef 1 and a separately prepared winch with a winch 18 performs the lifting work as shown in FIG. When the recovery line 15 is wound up by the winch 19, the recovery metal fitting 20 on one end side of the recovery line 15 does not come off from the mooring line 4, so that the anchor 2 and the fish reef body 3 on both ends of the mooring line 4 are integrated. Thus, the entire middle-floating floating reef 1 floats on the sea surface and can be collected on the trolley 18. As described above, the coupling work of the recovery metal fitting 20 and the mooring line 4 is performed by the small work ship 10 having a small turn, and the lifting work of the heavy middle-floating fish reef 1 is performed by the large trolley 18. As a result, the overall work time can be shortened and the efficiency of marine work where the weather changes easily can be improved. Of course, it is possible to handle a single ship without sharing a series of operations.

  According to the present invention, various members including anchors can be easily and reliably lifted from various middle-floor floating reefs installed at a deep water depth where divers cannot dive by an efficient operation of the unmanned submersible.

  DESCRIPTION OF SYMBOLS 1 ... Middle-floating fish reef, 2 ... Anchor, 3 ... Fish reef body, 4 ... Mooring line, 5 ... Secondary mooring line, 10 ... Work ship, 11 ... Guide line, 12 ... Hook, 13 ... Unmanned submersible, 14 ... Control cable , 15 ... recovery cable, 16 ... guide ring, 17 ... buoy, 18 ... bogie, 19 ... winch, 20 ... metal fitting for recovery, 21 ... metal fitting body, 22 ... opening, 23 ... stopper member, 24 ... housing part, 25 ... Guide body, 26 ... Hook part

Claims (4)

  Move the tip of the guide rope suspended from the work boat to the middle-floor floating reef where the fish reef body is moored in a floating state under a predetermined area under the sea surface via a mooring line connected to an anchor set on the sea floor. Using the guide rope, an unmanned submersible with a metal fitting for detachment attached to one end of the recovery line that is fed out from the work ship after the work ship is fixed by hanging it at an appropriate position on the fish reef body While hanging down to the vicinity of the fish reef body, operating the unmanned submersible to connect the collection bracket to the mooring line below the fish reef body, separating the collection bracket and the unmanned submersible, unmanned diving A method for recovering a middle-floor floating fish reef, wherein after the machine is lifted, the recovery rope is wound up on a work boat to lift the middle-floor floating fish reef.   After the recovery metal fitting is coupled to the mooring line, a buoy is attached to the other end of the recovery line and left on the surface of the sea, and another work ship uses the other end of the recovery line as a mark on the ship. The method for recovering a middle-floating floating fish reef according to claim 1, wherein the middle-floating fish reef is lifted up and wound up to wind up the middle-floating fish reef.   The middle-floating floating reef according to claim 1 or 2, wherein after the recovery metal fitting is coupled to the mooring line, the hooking state of the guide line with respect to the fish reef body is released, and the guide line is pulled up. Recovery method.   A guide body made of a rod-like member having buoyancy is arranged in a substantially V shape in plan view so as to open from the opening to the metal fitting body that can receive the mooring line from the opening on the outer peripheral side to the inner housing. A metal fitting for recovery used in the method for recovering a middle-floating floating reef according to any one of claims 1 to 3.

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