Shape-retaining ring for landing net and landing net equipped with the shape-retaining ring

Abstract

To provide a shape-retaining ring for a landing net, which can be inserted and removed freely through the mesh of a net bag, thereby tensioning the net bag in a circular opening state at all times. [Solution] The device is made up of a metal wire (10) having elastic restoring force such as piano wire, a soft joint tube (11) that connects both cut ends (10a) and (10b) of the metal wire together, and a hard cover tube (12) inserted into and fixed to the middle part (11c) of the joint tube. One half (11a) of the joint tube is inserted into and fixed to one cut end (10a) of the metal wire, and the other cut end (10b) of the metal wire is inserted into the other half (11b) of the joint tube so as to be freely inserted and removed until it butts against the cut end (10a), thereby forming an endless circular shape.

Description

[Technical Field]

[0001] The present invention relates to a shape-retaining ring for a landing net used primarily for collecting seafood, and to a landing net equipped with the shape-retaining ring in a net bag. [Background technology]

[0002] A landing net, which is primarily used to catch fish, sea urchins, and other seafood, typically has a mesh bag with an approximately U-shaped cross section hanging from an opening rim frame at the end of the handle, and the seafood is caught in the mesh bag.

[0003] When the landing net is used with the opening edge frame (opening plane) horizontal, the body of the net bag is cylindrical, so to speak, and maintains a circular opening. However, when the opening edge frame (opening plane) is tilted or stood upright, for example to capture fish or sea urchins from the seabed or rocks, the bodies of the net bag hanging down from the opening edge frame may come close to each other and deform into a flattened shape, narrowing the opening width, or they may come into contact (adhere) and deform into a closed shape with no opening width.

[0004] As a result, the dorsal and ventral fins of fish and the spines of sea urchins get caught and entangled in the mesh of the net bag, preventing the fish and sea urchins from passing smoothly and in an orderly manner from the opening edge of the landing net through the body of the net bag to the bottom, making it difficult to catch a large number of fish and sea urchins.

[0005] In particular, if it were necessary to haul the dip net onto a work boat and remove it from its mesh bag each time a sea urchin was caught from the seabed or rocks, the work would be inefficient and would require a great deal of time and effort. Therefore, a method is needed that can easily catch a large number of seafood and then efficiently haul it all up onto the work boat in one go.

[0006] In this regard, Patent Document 1 discloses a method for manufacturing a landing net in which the lower half of the net is treated under high temperature and high pressure to retain its shape in an approximately bell-like shape so as not to bunch up. Patent Document 2 also describes an oyster farming cage in which shape-retaining frames are provided at the top and bottom ends and a net is attached. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 59-130118 [Patent Document 2] Utility Model Registration No. 3198414 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the structure of the landing net manufactured by the method disclosed in Patent Document 1, even though the lower half (body and bottom) has been treated to prevent it from remaining bundled, the monofilament thread, which is the original material, is merely bent into an approximately bell-like shape, so to speak.Therefore, although this may be fine when used in a horizontal position on the frame (21) as shown in Figure 2, if the frame (21) is used in an inclined or vertical position, it is inevitable that the body and bottom of the landing net will be deformed, narrowing the opening width, or will stick together without any opening width.

[0009] Furthermore, the original shape of the landing net, which is made from monofilament thread, is processed under high temperature and pressure to retain its shape, so its shape retention effect tends to deteriorate over time, resulting in problems with reliability and durability.

[0010] On the other hand, even if the shape-retaining frame (20) provided in the oyster farming cage described in Patent Document 2 is formed into a circular, rectangular, or other shape, it is fixed and integrated to the upper and lower ends of the net (mesh bag) (30) as a framework, so to speak, and therefore the mounting position of the shape-retaining frame (20) cannot be freely changed.

[0011] Furthermore, the shape-retaining frame (20) is made of a "flexible metal rod or synthetic resin" and does not exhibit a restoring elastic force, so the net (30) cannot be kept in a constantly taut, open state.

[0012] Furthermore, they are used as oyster farming cages, hanging into the sea and in a stationary state, and are not used like landing nets, where the handle is held and manipulated by hand to hold the opening edge frame of the net bag not only horizontally, but also tilted or erected vertically.

[0013] In any case, the shape-retaining landing net described in Patent Document 1, as well as the shape-retaining frame (20) described in Patent Document 2, are not separate and independent from the net (mesh bag) (30) of the aquaculture cage, so it is impossible to freely change their installation position or to attach them to existing landing nets as a retrofit, and it must be said that they are inferior in convenience and versatility in use. [Means for solving the problem]

[0014] The present invention aims to solve such problems, and to achieve this aim, claim 1 provides a shape-retaining ring for a landing net, which is made of a certain length of piano wire, hard steel wire, springy stainless steel wire, or other metal wire having a restoring elasticity,

[0015] a flexible joint tube of a certain length that connects one cut-off end of the metal wire to the other cut-off end;

[0016] and a hard cover tube of a certain length inserted and fixed to the middle portion of the joint tube to prevent the middle portion of the joint tube from being bent and deformed.

[0017] One half of the joint tube is inserted and fixed to one cut-off end of the metal wire, and the other cut-off end of the metal wire is inserted into the other half of the joint tube so as to be freely inserted and removed until it abuts against the one cut-off end, thereby making the entire body endless in a circular shape.

[0018] In this case, claim 2 is characterized in that the metal wire is a piano wire, the surface of which is coated with a corrosion-resistant colored resin.

[0019] In claim 3, a urethane tube is used as the soft joint tube, and an FRP tube is used as the hard cover tube,

[0020] The cover tube is a short, fixed length corresponding to 2 / 5 to 1 / 2 of the fixed length of the joint tube, and is inserted and fixed in a sleeve-fit state to the middle part of the joint tube via an adhesive.

[0021] Claim 4 is characterized in that a translucent FRP tube is inserted and fixed into the middle of a transparent urethane tube via a transparent adhesive.

[0022] On the other hand, claim 5 is a fishing net in which a mesh bag with an approximately U-shaped cross section hangs down from the opening edge frame at the tip of the handle, and the shape-retaining ring described in claim 1 or 2 is inserted into the mesh of the mesh bag so that it is attached approximately parallel to the opening edge frame and can be inserted and removed freely, making the overall shape endless and circular, thereby maintaining the mesh bag in a circular, open state at all times.

[0023] Furthermore, claim 6 is characterized in that one shape-retaining ring or multiple shape-retaining rings with the same or different opening diameters are attached to the body and / or bottom of the mesh bag in a state where they are inserted through the mesh. [Effects of the Invention]

[0024] According to the configuration of claim 1, since the metal wire has a restoring elastic force, there is no risk of the endless circular shape serving as a shape-retaining ring being accidentally deformed, and this restoring elastic force acts as an expansion force that biases the mesh bag of the net in the direction of expanding it, thereby keeping the mesh bag in a circular, stretched, open state at all times.

[0025] Furthermore, because the joint tube is soft, even if the metal wire has the above-mentioned elastic restoring force, the cut-off end and the other end of the metal wire can be connected together in a smooth, circular curve. However, because the joint tube is soft as is, the cut-off end and the other end of the metal wire would bend in a mountain shape, making them more likely to come off the joint tube. However, because the hard cover tube is inserted and fixed into the middle of the joint tube, where the cut-off ends of the metal wire abut, the middle of the joint tube does not bend, and the cut-off ends of the metal wire are held in a forced, straight connection by the hard cover tube, so there is no risk of them coming off the joint tube, and a shape-retaining ring with an endless, stable circular shape can be obtained.

[0026] In this case, if the configuration of claim 2 is adopted, the high elastic modulus of the piano wire can be used to keep the expanded state of the mesh bag in the landing net more stable, and corrosion of the piano wire can also be prevented.

[0027] If the configuration of claim 3 is adopted, the weight of the shape-retaining ring can be reduced while still using metal wire. In addition, the short required length of the cover tube relative to the overall length of the joint tube allows the metal wire to be bent into a smooth circle, making the connection state endless (unified) with both separated ends butting together, while still maintaining the connection so that it does not easily come loose.

[0028] Furthermore, if the configuration of claim 4 is adopted, the state of connection where the two separated ends of the metal wire butt together can be seen from the outside, which helps to correct any insufficient insertion. It can be said that the color of the colored resin coating applied to the piano wire as described in claim 2 also works effectively in this regard.

[0029] On the other hand, according to the configuration of claim 5, the shape-retaining ring is inserted into the mesh of the net bag in the landing net so that it is attached approximately parallel to the opening edge frame of the net bag, and is freely inserted and removed, making the entire net endless in a circular shape.Therefore, not only is there no risk of the shape-retaining ring coming off the net bag of the landing net, but the restoring elastic force of the metal wire in the shape-retaining ring allows the net bag of the landing net to be kept in a circular, tensioned open state at all times.Even if the opening edge frame of the landing net is tilted or stood vertically, there is no risk of the opening of the net bag becoming narrow and flattened, or being stuck together and deforming (deforming) (losing its shape).

[0030] As a result, the problems with the conventional technology mentioned at the beginning can be completely solved, and in particular, it is possible to smoothly capture a large number of sea urchins, fish, and other seafood (marine products) that live on the seabed or rocky areas all the way to the bottom of the net bag in the landing net, and is extremely useful in the work of pulling up a large number of captured seafood onto a work boat at once, thereby improving work efficiency and convenience.

[0031] Furthermore, since the shape-retaining ring is designed to be inserted and removed freely from the detached end of the metal wire into the mesh of the net bag in the landing net, it can be attached and detached from the net bag quickly and easily, and its installation position can be freely changed depending on the seafood harvesting conditions and the user's wishes.Furthermore, it is convenient and versatile in that it can be attached and used as an after-market attachment to existing landing nets and nets with opening edge frames that are not only circular but also square.

[0032] Furthermore, if the configuration of claim 6 is adopted, the number of shape-retaining rings used and the opening diameter (size) can be changed depending on the depth and opening width of the net bag in the landing net. When attaching one shape-retaining ring, it is preferable to attach it so that it passes through the mesh at the boundary between the cylindrical body and the conical bottom of the landing net. If the net bag of the landing net is deep, multiple shape-retaining rings can be installed in parallel in multiple stages at the required intervals in the long cylindrical body. [Brief explanation of the drawings]

[0033] [Figure 1] 1 is a plan view showing the deployed state of a shape-retaining ring for a landing net according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the shape-retaining ring that has been made endless into a circular shape from the state shown in FIG. 1. [Figure 3] FIG. 3 is an enlarged cross-sectional view showing a main part of FIG. 2. [Figure 4] 3 is a cross-sectional view corresponding to FIG. 2 showing a state in which the other end of the metal wire that has been cut off has been pulled out from the joint tube. [Figure 5] FIG. 5 is an enlarged cross-sectional view taken along line 5-5 in FIG. 4. [Figure 6] This is an oblique view showing a landing net with one shape-retaining ring attached to the net bag. [Figure 7] 1 is a perspective view showing a landing net with multiple shape-retaining rings attached to a mesh bag. DETAILED DESCRIPTION OF THE INVENTION

[0034] A preferred embodiment of the present invention will be described in detail below with reference to the drawings. Figures 1 to 5 show a shape-retaining ring (R) for a landing net according to this embodiment, which comprises a metal wire (10) of a certain length (L1) (e.g., 780 mm) that is curved into an arc in a plan view, a joint tube (11) of a certain length (L2) (e.g., 100 mm) that connects one detached end (10a) and the other detached end (10b) of the metal wire (10) together, and a cover tube (12) of a certain length (L3) (e.g., 40 mm) that is inserted and fixed to an intermediate portion (11c) of the joint tube (11) via an adhesive (not shown) in a sleeve-fit state.

[0035] Among the various components constituting the shape-retaining ring (R), the metal wire (10) is a piano wire, hard steel wire, springy stainless steel wire, or other metal wire that can exert elasticity when bent, preferably a piano wire with a circular cross section, and its surface is coated with a corrosion-resistant resin. Material (The thickness of the piano wire 10 is, for example, about 2 mm including the resin coating film 13. The resin coating is preferably a colored resin, such as green or blue.

[0036] The joint tube 11 is made of a soft synthetic resin that can bend to accommodate the curvature of the metal wire (piano wire) 10, and it is particularly preferable to use a transparent urethane tube. For example, the outer diameter is 4 mm and the inner diameter is 2.5 mm, so that the metal wire 10 inserted into the hollow interior can be seen from the outside.

[0037] Furthermore, the cover tube 12 is made of a hard synthetic resin to stiffen (reinforce) the middle portion 11c of the joint tube 11 so that it does not bend, and therefore its fixed length L3 is the same as that of the middle portion 11c of the joint tube 1. It is preferable to use a translucent or white FRP (fiber reinforced plastic) tube as the hard synthetic resin.

[0038] One half (11a) of the soft joint tube (11) is inserted into the detached one end (10a) of the metal wire (piano wire) (10) in a sleeve-fitting state as shown in FIGS. 3 and 4, and they are fixed together with an adhesive (not shown). At the same time, the other detached end (10b) of the metal wire (piano wire) (10) is inserted into the other half (11b) of the joint tube (11) so as to be freely inserted and removed. As a result, the metal wire (piano wire) (10) changes from an arc shape in plan view as shown in FIGS. 1 and 2 to an O-shape, so to speak, and becomes endless overall, and is formed into a shape-retaining ring (R).

[0039] In this case, the other cut-off end (10b) of the metal wire (piano wire) (10) inserted removably into the other half (11b) of the joint tube (11) abuts against the cut-off end (10a) of the same metal wire (piano wire) (10) at the position of the middle part (11c) which is reinforced by the overlapping hard cover tube (12) of the joint tube (11) as shown in Figure 3, and they are connected together.

[0040] In other words, in the illustrated embodiment, the cut-off end (10a) and the cut-off other end (10b) of the metal wire (piano wire) (10) are inserted into the hollow interior of the joint tube (11) by a fixed length (50 mm) of equal length, and a fixed length (20 mm) of these is kept overlappingly covered by the cover tube (12).

[0041] Therefore, there is no risk of the metal wire 10 being abnormally curved, as if bending into a mountain shape, at the point of contact P where the cut-off one end 10a and the cut-off other end 10b meet, and there is no risk of the cut-off other end 10b of the metal wire 10 accidentally coming out of the joint tube 11, so that a stable circular shape-retaining ring R can be obtained. The restoring elasticity of the metal wire 10 also serves to provide resistance to coming out of the joint tube 11.

[0042] In this regard, the illustrated cover tube (12) has a fixed length (L3) of 40 mm, which occupies 2 / 5 of the fixed length (L2) (100 mm) of the joint tube (11), but it may be made longer to 1 / 2. However, if the length is shorter than 2 / 5, the abutting contact point (P) is likely to bend improperly, and conversely, if the length is longer than 1 / 2, the strong resistance of the cover tube (12) makes it difficult to bend the metal wire (10) into a smooth circle, which creates an uncomfortable feeling. Ruho This results in a ring-shaped (R) shape, which is undesirable.

[0043] The shape-retaining ring (R) of the above construction is used for a landing net (N) as shown in Figure 6, which is used to catch mainly fish, sea urchins, and other seafood. The landing net (N) may be a known product having a grip handle (14) of a required length, an opening edge frame (15) with a fixed opening diameter attached to the tip of the grip handle (14), and a flexible mesh bag (16) that hangs down from the opening edge frame (15) to a certain depth with a substantially U-shaped cross section. The mesh bag (16) is made of monofilament made of nylon, polyester, or other synthetic or natural fibers. thread It is knitted from and has a mesh.

[0044] When attaching the shape-retaining ring (R) to the landing net (N), the other separated end (10b) of the metal wire (piano wire) (10), which is cut and curved in an arc shape when viewed from above, is inserted into the mesh at the desired appropriate position so that it is attached to the body (16a) or bottom (16b) of the mesh bag (16) in the landing net (N) in a state that is approximately parallel to the opening edge frame (15), and finally, the metal wire (10) is inserted into a joint tube (11) that has been previously fixed and integrated to the one separated end (10a) of the metal wire (10), thereby connecting the metal wire (10) of the shape-retaining ring (R) into a single, circular shape (endless).

[0045] Conversely, the metal wire (10) may be connected in a circular fashion (endless) by inserting the joint tube (11), which has been previously fixed and integrated to the cut-off end (10a) of the metal wire (10), into the mesh of the body (16a) or bottom (16b) of the mesh bag (16) so that it is also installed approximately parallel to the opening edge frame (15), and then inserting the other cut-off end (10b) of the metal wire (10) into the joint tube (11).

[0046] In this way, the shape-retaining ring (R) attached in a state of being inserted into the mesh keeps the body (16a) and bottom (16b) of the net bag (16) in the landing net (N) in a circular, stretched open state as shown in Figure 6. Therefore, when the opening edge frame (15) is used in an inclined or upright position, the body (16a) and bottom (16b) of the net bag (16) are not deformed in an indefinite manner. the law of nature, There is no risk of the opening becoming narrow and flattened, much less closing without any opening width, and a large number of seafood such as sea urchins and fish can be taken in by smoothly entering them one by one all the way to the bottom (16b) of the net bag (16).

[0047] In this case, in the landing net (N) shown in Figure 6, one shape-retaining ring (R) is attached in a threaded state to the mesh located at the boundary (16c) between the cylindrical body (16a) and the conical bottom (16b) of the net bag (16).However, if the net bag (16) of the landing net (N) is deep, multiple shape-retaining rings (R) (R1) (R2) can be attached in a threaded state in multiple rows at the required intervals (D) to the relatively long cylindrical body (16a) of the net bag (16), as shown in Figure 7, and in this case, the opening diameters of the shape-retaining rings (R) (R1) (R2) can be made different.

[0048] In any case, the shape-retaining ring (R) can be removed from the mesh of the mesh bag (16) of the landing net (N) by pulling the other detached end (10b) of the metal wire (10) out of the joint tube (11) to which the detached one end (10a) is previously fixed and integrated. Therefore, with this extremely simple attachment and detachment operation, it can be conveniently attached to the desired position on the body (16a) or bottom (16b) of the mesh bag (16) and can also be replaced with a new shape-retaining ring (R). If removal is not necessary, it can be fixed and integrated by filling the gap where the other detached end (10b) of the metal wire (10) is inserted into the joint tube (11) with adhesive (not shown) when the insertion is finally completed.

[0049] Although the description has been given of a landing net (N) in which the opening edge frame (15) of the mesh bag (16) is circular, the shape-retaining ring (R) in the above embodiment of the present invention can also be attached to a landing net (N) in a manner that inserts it into the mesh of a mesh bag (16) that hangs down from an opening edge frame (15) that is square, triangular, D-shaped, or other non-circular, thereby keeping the mesh bag (16) always in a circular, stretched open state. [Explanation of symbols]

[0050] (10)...Metal wire rod (10a) Separated end (10b) Separated other end (11) Joint tube (11a)...One half (11b)...Other half (11c)...middle part (12) Cover tube (13) Resin coating (14) Grip (15) Opening edge frame (16)...Net bag (16a) Body (16b)...Bottom (16c)...Boundary part (R)(R1)(R2) Shape-retaining ring (N) Landing net

Claims

1. A certain length of piano wire, hard steel wire, springy stainless steel wire, or other metal wire with elasticity, a flexible joint tube of a certain length that connects one cut-off end of the metal wire to the other cut-off end; and a hard cover tube of a certain length inserted and fixed to the middle portion of the joint tube to prevent the middle portion of the joint tube from being bent and deformed. The shape-retaining ring for nets is characterized in that one half of a joint tube is inserted and fixed into one detached end of the metal wire, and the other detached end of the metal wire is inserted and removed freely into the other half of the joint tube until it abuts against the one detached end, thereby making the entire ring endless in a circular shape.

2. 2. A shape-retaining ring for a landing net according to claim 1, wherein the metal wire is a piano wire and the surface thereof is coated with a corrosion-resistant colored resin.

3. A urethane tube is used as the soft joint tube, and an FRP tube is used as the hard cover tube. A shape-retaining ring for a landing net as described in claim 1 or 2, characterized in that the cover tube is a short, fixed length equivalent to 2 / 5 to 1 / 2 of the fixed length of the joint tube, and is inserted into the middle part of the joint tube in a sleeve-fit state and fixed using adhesive.

4. 4. A shape-retaining ring for a landing net according to claim 3, wherein a translucent FRP tube is inserted into the middle of the transparent urethane tube and fixed thereto via a transparent adhesive.

5. This is a netting net having a mesh bag with an approximately U-shaped cross section hanging down from an opening edge frame at the tip of the handle, and the shape-retaining ring described in claim 1 or 2 is inserted into the mesh of the mesh bag so that it is attached approximately parallel to the opening edge frame and can be inserted and removed freely, making it endless and circular overall, thereby maintaining the mesh bag in a circular, open state at all times.

6. A landing net as described in claim 5, characterized in that one shape-retaining ring or multiple shape-retaining rings with the same or different opening diameters are attached to the body and / or bottom of the net bag in a state where they are inserted through the mesh.

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