Binding device for tubular bodies and float for fish and shellfish farming

Abstract

To provide a binding tool easily and firmly connecting respective tubular bodies constituting a floating body and preventing deviation in physical relation of the respective tubular bodies in use, and floating body having necessary buoyancy formed by connecting the respective tubular bodies by using the binding tool.SOLUTION: A raft 1 for fish and fishery cultivation includes a plurality of tubular bodies 2, and a binding tool 3 for binding the tubular bodies 2, with their spaced at prescribed intervals in the radial direction. Each tubular body 2 and the binding tool 3 are respectively made of a resin material and connected to each other by electrofusion bonding or heat fusion bonding.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a float for fish and shellfish farming that is set afloat on the surface of water such as the sea, lake, or pond, and a fastener for fastening a plurality of tubular bodies that constitute the float. [Background technology]

[0002] In the past, in aquaculture, floating bodies such as rafts and fish cages have been generally floated on the water surface to raise fish and shellfish. For example, a float for aquaculture of fish and shellfish disclosed in Patent Document 1 includes a main frame having a plurality of metal or resin rod-shaped bodies and a plurality of floats made of foam made of synthetic resin material, and the main frame is assembled by connecting each of the rod-shaped bodies arranged to form a rectangular frame shape in a plan view with each float.

[0003] However, floats made of foam made of synthetic resin material, such as those in Patent Document 1, have low resistance to the impact of waves generated by typhoons and the erosion by living organisms, and if they are left floating on the water surface for a long period of time, they will break into pieces, or become damaged and detached from the main frame, turning into floating debris on the water surface, causing problems not only in terms of pollution of oceans and lakes, but also in terms of affecting the ecosystem.

[0004] To avoid this, it is conceivable to make the main frame of the float lightweight by constructing it from multiple tubular bodies, and by increasing the overall volume of the main frame, to create a structure that gives the float the necessary buoyancy without using a float as in Patent Document 1. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Microfilm of Utility Model Application No. 54-091677 (Utility Model Application No. 56-8172) Summary of the Invention [Problem to be solved by the invention]

[0006] However, if an attempt is made to increase the volume of the entire main frame by making the tubular body itself larger, the tubular body becomes more cumbersome to transport and the installation workability deteriorates. Furthermore, the rigidity of the tubular body increases, making it difficult to maintain the shape of the tubular body after bending it.

[0007] On the other hand, when attempting to increase the overall volume of the main frame by bundling multiple tubular bodies together, the transportation, installation, and bending processes are each easier than when the tubular bodies themselves are made larger to increase the overall volume of the main frame; however, it is necessary to bundle each tubular body together, and the conventional methods of tying them together with wire or connecting them with multiple brackets and fastening members not only involve complicated work, but also pose the risk of the relative positions of the tubular bodies at the bundling part becoming misaligned if force is suddenly applied during use.

[0008] The present invention has been made in consideration of these points, and its object is to provide a fastening device that simply and firmly connects the tubular bodies that make up a float, preventing any misalignment of the positional relationships of the tubular bodies during use, and a float having the required buoyancy formed by connecting the tubular bodies using the fastening device. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention is characterized in that each tubular body and a fastener are connected by electrofusion bonding or heat fusion bonding.

[0010] Specifically, the following solution has been implemented in a fastener that fastens a plurality of tubular bodies constituting a float for fish and shellfish farming at a predetermined radial interval.

[0011] That is, in the first invention, the tying tool and each of the tubular bodies are formed of a resin material, and are connected to each other by electrofusion bonding or heat fusion bonding. The fastener is provided with a fitting portion into which the tubular body is fitted when the tubular body is connected, and the fitting portion is a fitting recess into which the tubular body is fitted in a radial direction. It is characterized by the above.

[0012] No. 2 In the present invention, 1 In the invention, the fitted portion is arranged in a plurality of rows at predetermined intervals in the radial direction of the tubular body in a state where the tubular body is fitted with the fitted portion.

[0013] No. 3 In the present invention, 1 In the invention, the fastener has at least one pair of fitting recesses formed on the front and back sides thereof, the fitting recesses being open in opposite directions.

[0014] No. 4 In the present invention, 1 In the invention, the surface of the fastener has a plurality of mating recesses that open toward the surface side of the fastener, which are arranged side by side at predetermined intervals in the radial direction of the tubular body when it is mated with the mating recesses and in a direction perpendicular to the mating direction.

[0015] No. 5 In the present invention, 4 In the invention, the back surface of the fastener has a plurality of mating recesses that open to the back surface side of the fastener, which are arranged side by side at predetermined intervals in the radial direction of the tubular body when it is mated with the mating recesses and in a direction perpendicular to the mating direction.

[0016] A sixth invention relates to a fastening device for fastening a plurality of tubular bodies constituting a float for fish and shellfish farming at a predetermined radial interval, the fastening device and each of the tubular bodies being formed from a resin material and connected to each other by electrofusion joining or heat fusion joining, and the fastening device is configured so that other fastening devices excluding the fastening device itself can be connected to the fastening device.

[0017] No. 7 In the present invention, the first to second 6 In any one of the above-mentioned inventions, an electric heating wire for electrofusion bonding is embedded in an area inside the fastener corresponding to the joining position of the tubular bodies.

[0018] No.8 In the present invention, the first to second 6 In any one of the above-mentioned inventions, the fastener is provided with a resin sheet that can be laid in an area corresponding to the connection position of the tubular body and has an electric heating wire for electrofusion joining embedded therein.

[0019] No. 9 In the present invention, the first to second 5, 7th, 8th In any one of the above-mentioned inventions, the fastener is configured so that other fasteners other than the fastener itself can be connected to the fastener.

[0020] No. 10 In the present invention, the float for fish and shellfish farming is 9 and a plurality of the tubular bodies bound together by the binding device. Effect of the Invention

[0021] In the first invention, the binder and each tubular body are integrated by simply bringing the binder and each tubular body into contact with each other and passing an electric current through the contact portion, or by simply bringing a heated portion of the binder and a heated portion of each tubular body into contact with each other, so that the binder and each tubular body can be easily connected. Also, since the binder and each tubular body are connected to each other by fusion, the binder and each tubular body are firmly fixed, and even if a force is suddenly applied, the binder can prevent the positional relationship of each tubular body from being shifted. In addition, in the first invention, when the fastener and the tubular body are connected, the tubular body is fitted into the fitted portion of the fastener, so the connection position of the tubular body relative to the fastener is accurately determined. Therefore, the tubular body can be connected to the fastener at an accurate position. In addition, in the first invention, the work of fitting the tubular body into the fitted portion is simplified, so the time required for assembly work can be reduced.

[0022] No. 2 In the invention, when each tubular body is fitted into each fitting portion of the fastener, the tubular bodies are lined up in a precise position with a predetermined interval between them, so that the multiple tubular bodies can be assembled to the fastener without variation.

[0023] No. 3In the invention, when multiple tubular bodies are connected, the binder is positioned inside the multiple tubular bodies, so that the volume occupied by the binder can be reduced and the material costs of the binder can be kept low.

[0024] No. 4 In the invention, when the tubular bodies are fitted into the fitting recesses of the fastener, the tubular bodies are neatly lined up at a predetermined interval. Therefore, the tubular bodies can be connected to the fastener at accurate positions and in a neatly arranged state.

[0025] No. 5 In the invention, when the tubular bodies are fitted into the fitting recesses of each fastener, the tubular bodies are neatly arranged in two rows at a predetermined interval. Therefore, the tubular bodies can be connected to one fastener at accurate positions and in a state of being arranged in two rows.

[0026] No. 7 In the invention, since the heating wire is embedded in the fastener, the transport and installation of the fastener is easier than in a case where the heating wire is not embedded in the fastener, and the workload of the worker can be reduced.

[0027] No. 8 In the present invention, it is only necessary to prepare resin sheets in the number of tubular bodies to be connected to the fastener, so that the heating wires are embedded in advance in positions corresponding to all of the fitting recesses. 7 This makes it possible to produce a binding device at a lower cost than the previous invention.

[0028] 6th and No. 9 In the invention, since a plurality of fasteners can be connected, the number of tubular bodies arranged in parallel can be increased by increasing the number of fasteners as necessary.

[0029] No. 10 In the invention, the individual tubular bodies constituting the float can be easily connected by fasteners, so that a float made up of a number of tubular bodies sufficient to obtain the required buoyancy can be easily produced. [Brief description of the drawings]

[0030] [Figure 1] 1 is a plan view showing a raft for breeding fish and shellfish according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged view of part II in FIG. [Diagram 3] FIG. 3 is a view taken along the arrow III in FIG. [Figure 4] FIG. 4 is a view taken along the arrow IV in FIG. [Diagram 5] FIG. 5 is a view taken along the arrow V in FIG. 4. [Figure 6] FIG. 1 is a perspective view of a tie according to a first embodiment of the present invention. [Figure 7] FIG. 5 is a view corresponding to FIG. 4 according to a second embodiment of the present invention. [Figure 8] FIG. 5 is a view corresponding to FIG. 4 according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which: It should be noted that the following description of the preferred embodiments is merely exemplary in nature.

[0032] First Embodiment of the Invention 1 shows a raft 1 (floating body) for fish and shellfish farming according to a first embodiment of the present invention. The raft 1 is used by floating it on the water surface during aquaculture, and includes a plurality of tubular bodies 2 arranged concentrically in a circular ring shape centered on a center line C1 in a plan view, and a plurality of fasteners 3 for fastening the tubular bodies 2 at predetermined intervals in the radial direction of the tubular bodies 2.

[0033] There are three types of tubular bodies 2 with different ring sizes centered on center line C1, and the raft 1 has two of each of the three types of tubular bodies 2 with different ring sizes.

[0034] The tubular body 2 comprises a pipe main body 2a obtained by bending a polyethylene pipe so as to have a circular shape when viewed in a plane, and a joint portion 2b which is a socket joint that connects the ends of the pipe main body 2a, and an electric heating wire (not shown) for electrofusion joining (hereinafter referred to as EF joining) is embedded in the joint portion 2b.

[0035] The tubular body 2 is obtained by inserting each end of the pipe main body 2a, which has a circular ring shape obtained by bending processing, into two sockets of the joint portion 2b, respectively, and passing an electric current through an electric heating wire (not shown) to generate heat, thereby fusing the pipe main body 2a and the joint portion 2b to each other by heating and melting them, thereby integrating them into one body.

[0036] As shown in FIG. 1, the binders 3 are disposed at eight positions P1 to P8 that are equally spaced apart in the circumferential direction around the center line C1 of the tubular bodies 2 to bind each of the tubular bodies 2, and at each of the positions P1 to P8, two binders 3 bind each of the tubular bodies 2, as shown in FIG. 3.

[0037] In other words, the raft 1 in embodiment 1 of the present invention is configured such that each tubular body 2 is bound together using 16 binding devices 3, and three tubular bodies 2 are arranged side by side radially around the center line C1, in two upper and lower rows.

[0038] As shown in Figures 5 and 6, the fastener 3 is formed from the same polyethylene material as the tubular body 2, and includes a fastener main body 4 having a long, flat, approximately rectangular shape, and three resin sheets 5 each having a regular octagonal shape in a plan view.

[0039] The tie body 4 has a roughly band-shaped surface portion 4a extending in the longitudinal direction of the tie body 4, a pair of side portions 4b protruding parallel to each other from both longitudinal ends of the surface portion 4a toward the back surface side, and a band-shaped back surface portion 4c bridging the protruding ends of the side portions 4b.

[0040] A pair of partition walls 4d are provided between both side surface portions 4b, dividing the space between both side surface portions 4b into three equally spaced portions, and each partition wall 4d bridges between the front surface portion 4a and the back surface portion 4c.

[0041] As shown in Figs. 3 and 4, the surface portion 4a is provided with three fitting recesses 4e (fitted portions) into which the tubular body 2 is fitted.

[0042] Each mating recess 4e is formed such that, when viewed from a side perpendicular to the longitudinal direction of the tie body 4, the front surface 4a is curved in an arch shape toward the back surface 4c, and the curved surface has a shape that corresponds to the outer peripheral surface of the tubular body 2.

[0043] That is, when the tubular body 2 is connected to the fastener 3, the tubular body 2 is fitted into the fitting recess 4e in the radial direction of the tubular body 2.

[0044] The fitting recesses 4e are provided at equal intervals at predetermined intervals in the longitudinal direction of the tie body 4. That is, three fitting recesses 4e are provided side by side at predetermined intervals in the radial direction of the tubular body 2 in a state fitted into the fitting recesses 4e and in a direction perpendicular to the fitting direction.

[0045] In embodiment 1, at each of positions P1 to P8, as shown in FIG. 3, two fasteners 3 are integrated by fusing their back surfaces 4c together, and the mating recesses 4e of each fastener 3 are open to opposite sides.

[0046] In other words, the fastener 3 is configured so that other fasteners 3 other than the fastener 3 in question can be connected to each other.

[0047] The resin sheet 5 is made of the same polyethylene material as the tubular body 2 and the fastener 3, and has a through hole 5b formed in the center.

[0048] An electric heating wire 5a for EF bonding is embedded inside the resin sheet 5 so as to extend in a spiral shape around the through hole 5b.

[0049] A controller 6 is connected to the end of the heating wire 5a, and the controller 6 is capable of passing a current through the heating wire 5a to generate heat.

[0050] The resin sheet 5 is formed with a thickness that allows flexibility, and can be laid along the areas of the fastener 3 that correspond to the connection positions of the tubular body 2, that is, along the surfaces of each fitting recess 4e.

[0051] Then, with a resin sheet 5 set in each mating recess 4e of the fastener 3, each tubular body 2 is fitted into it, and the controller 6 causes the heating wires 5a embedded in each resin sheet 5 to heat up, fusing corresponding portions of each tubular body 2 and the fastener 3, thereby connecting each tubular body 2 and the fastener 3 to obtain the raft 1.

[0052] Next, a method for assembling the raft 1 according to the first embodiment of the present invention will be described in detail.

[0053] First, prepare six polyethylene pipes, six socket joints made of polyethylene material, and 16 binding devices 3. The polyethylene pipes may be straight, or may have a curl due to being stored in a coiled state.

[0054] Next, the worker bends the polyethylene pipe into a circular shape, brings each end of the polyethylene pipe close to each other, and inserts them into each insertion port of the socket joint. Then, an electric current is passed through an electric heating wire (not shown) embedded in the socket joint, thereby heat-fusing the polyethylene pipe and the socket joint to obtain a tubular body 2 consisting of a pipe main body 2a and a joint part 2b. In the first embodiment of the present invention, three types of tubular bodies 2 with different ring sizes centered on the center line C1 are produced, two of each type.

[0055] Next, as shown in FIG. 4, two of each of the fasteners 3 are prepared, and the back surfaces 4c of each fastener 3 are fused together by EF bonding so that the mating recesses 4e of each fastener 3 face opposite each other, thereby creating a combined unit of eight fasteners 3 in total.

[0056] Furthermore, as shown in Figs. 4 and 5, a resin sheet 5 is laid in the fitting recess 4e of each fastener 3, and the resin sheet 5 is attached to the fitting recess 4e by EF bonding.

[0057] Thereafter, the eight connecting units of the fasteners 3 are arranged in a ring shape and at equal intervals, and each tubular body 2 is fitted into each fitting recess 4e. Then, the controller 6 is started to heat the heating wires 5a of each resin sheet 5 to fuse the corresponding portions of each tubular body 2 and fasteners 3, thereby obtaining the raft 1 in which each tubular body 2 and fastener 3 are connected.

[0058] As described above, according to embodiment 1 of the present invention, each tubular body 2 constituting the raft 1 can be easily connected by a fastener 3, so that a raft 1 consisting of a number of tubular bodies 2 sufficient to provide the required buoyancy can be easily made.

[0059] Furthermore, each tubular body 2 and the fastener 3 can be integrated simply by bringing them into contact with each other and passing an electric current through the contact portion, so that each tubular body 2 and the fastener 3 can be easily connected.

[0060] Furthermore, since each tubular body 2 and the fastener 3 are connected to each other by fusion, each tubular body 2 and the fastener 3 are firmly fixed to each other, and even if a force is suddenly applied, each fastener 3 can prevent the positional relationship of each tubular body 2 from shifting.

[0061] Furthermore, when the tubular body 2 and the fastener 3 are connected, the tubular body 2 is fitted into the fitting recess 4e of the fastener 3, so that the connection position of the tubular body 2 relative to the fastener 3 is accurately determined. Therefore, the tubular body 2 can be connected to the fastener 3 at an accurate position.

[0062] Furthermore, when each tubular body 2 is fitted into each fitting recess 4e of the fastener 3, the tubular bodies 2 are lined up in accurate positions at predetermined intervals. Therefore, the multiple tubular bodies 2 can be assembled to the fastener 3 without variation.

[0063] Furthermore, since the tubular body 2 can be brought into an engaged state with the engaging recess 4e simply by moving the tubular body 2 radially, the operation of engaging the tubular body 2 with the engaging recess 4e is simple, and the time required for assembly work can be reduced.

[0064] Furthermore, when each tubular body 2 is fitted into each fitting recess 4e of each fastener 3, the tubular bodies 2 are neatly lined up at a predetermined interval. Therefore, each tubular body 2 can be connected to the fastener 3 at an accurate position and in a neatly arranged state.

[0065] Furthermore, a resin sheet 5 is laid between the tubular body 2 and the fastener 3, and the heating wire 5a embedded in the resin sheet 5 is heated to integrate the tubular body 2 and the fastener 3. This means that it is only necessary to prepare resin sheets 5 for the number of tubular bodies 2 to be connected to the fastener 3, and there is no need to prepare resin sheets 5 in advance in a number corresponding to all of the mating recesses 4e, resulting in a fastener 3 with reduced component costs.

[0066] Furthermore, since a plurality of fasteners 3 can be connected, the number of tubular bodies 2 arranged in parallel can be increased by increasing the number of fasteners 3 as necessary.

[0067] Second Embodiment of the Invention 7 shows a fastener 3 according to a second embodiment of the present invention. Since the second embodiment is similar to the first embodiment except for a portion of the structure of the fastener 3 which differs from that of the first embodiment, the same parts as those in the first embodiment are given the same reference numerals, and only the other differences will be described.

[0068] The back surface 4c of the fastener 3 of the second embodiment is provided with three fitting recesses 4f into which the tubular body 2 is fitted.

[0069] Each mating recess 4f is formed by having the back surface portion 4c curved in an arch shape toward the front surface portion 4a when viewed from a side perpendicular to the longitudinal direction of the tie body main body 4, and the curved surface has a shape that corresponds to the outer peripheral surface of the tubular body 2.

[0070] In other words, the mating recess 4f is open on the opposite side to the mating recess 4f formed in the surface portion 4a, and when the tubular body 2 is connected to the fastener 3 at the mating recess 4f, the tubular body 2 is fitted into the mating recess 4f in the radial direction of the tubular body 2.

[0071] The fitting recesses 4f provided on the back surface portion 4c are located at positions corresponding to the fitting recesses 4e provided on the front surface portion 4a. That is, the three fitting recesses 4f are arranged side by side at predetermined intervals in the radial direction of the tubular body 2 in a state where the tubular body 2 is fitted into the fitting recesses 4f and in a direction perpendicular to the fitting direction.

[0072] That is, the fastener 3 of the second embodiment has three pairs of fitting recesses 4e and 4f formed on the front and back sides thereof, the fitting recesses 4e and 4f being open to opposite sides.

[0073] In the areas inside the fastener 3 of embodiment 2 corresponding to each mating recess 4e and each mating recess 4f, an electric heating wire 5a for EF joining is embedded, and when the tubular body 2 is connected to the fastener 3, the electric heating wire 5a is heated while the tubular body 2 is fitted into each mating recess 4e and each mating recess 4f, so that the tubular body 2 and the fastener 3 can be fused to each other without using a resin sheet 5 as in embodiment 1.

[0074] As described above, according to the second embodiment of the present invention, when the tubular bodies 2 are fitted into the fitting recesses 4e and 4f of the fastener 3, the tubular bodies 2 are neatly arranged in two rows at a predetermined interval. Therefore, the tubular bodies 2 can be connected to one fastener 3 at accurate positions and in a state of being arranged in two rows.

[0075] In addition, since the heating wire 5a for EF joining is embedded in the fastener 3, the transportation and installation of the fastener 3 is simplified compared to when the heating wire 5a is not embedded in the fastener 3, thereby reducing the workload of workers.

[0076] In addition, when connecting multiple tubular bodies 2, the binder 3 is positioned inside the multiple tubular bodies 2, so that the volume occupied by the binder 3 can be reduced, and the material cost of the binder 3 can be kept low.

[0077] Third embodiment of the invention 8 shows a fastener 3 according to a third embodiment of the present invention. Since the third embodiment is similar to the first embodiment except for a portion of the structure of the fastener 3 which differs from that of the first embodiment, the same parts as those in the first embodiment are given the same reference numerals, and only the other differences will be described.

[0078] The tie body 4 of embodiment 3 has a flat surface portion 4a and a flat back surface portion 4c, and a fitting cylindrical portion 4g (fitted portion) into which the tubular body 2 can be fitted is provided in the space S1 surrounded by the surface portion 4a, each side portion 4b and the back surface portion 4c.

[0079] The cylindrical fitting portions 4g have a tube center line extending in the communication direction of the space S1, and three of them are arranged side by side at predetermined intervals in the longitudinal direction of the tie body 4.

[0080] An electric heating wire 5a for EF joining is embedded inside each mating cylindrical portion 4g, and when connecting the tubular body 2 to the fastener 3, the electric heating wire 5a is heated while each tubular body 2 is fitted into each mating cylindrical portion 4g, thereby allowing the tubular body 2 and the fastener 3 to be fused to each other.

[0081] As described above, according to the third embodiment of the present invention, even if the portion where the tubular body 2 is connected to the fastener 3 is cylindrical and has a structure in which the tubular body 2 is inserted, the fastener 3 can be fastened in the same manner as the first and second embodiments. of The effect can be obtained.

[0082] In the first to third embodiments of the present invention, EF bonding is used to bond each tubular body 2 to the binder 3, but the present invention is not limited to this, and each tubular body 2 may be connected to the binder 3 using heat fusion bonding (HF bonding). In this case, each tubular body 2 and the binder 3 are integrated simply by bringing the heated portion of the binder 3 and the heated portion of each tubular body 2 into contact with each other, so that each tubular body 2 and the binder 3 can be easily connected to each other.

[0083] Further, in the first to third embodiments of the present invention, the number of tubular bodies 2 of the raft 1 is six, but this is not limited thereto, and the number of tubular bodies 2 of the raft 1 may be one to five, or seven or more.

[0084] Furthermore, in embodiments 1 to 3 of the present invention, each tubular body 2 is bound at eight locations on the tubular body 2 using the binding device 3, but the number of locations at which each tubular body 2 is bound using the binding device 3 may be any other number as long as the positional relationship of each tubular body 2 does not vary.

[0085] Furthermore, in embodiments 1 to 3 of the present invention, each tubular body 2 is bound using the binding device 3 at equally spaced positions in the circumferential direction around the center line C1, but the binding positions do not have to be equally spaced.

[0086] Further, in the first embodiment of the present invention, each fastener 3 is provided with a plurality of fitting recesses 4e, but each fastener may be provided with only one fitting recess.

[0087] In addition, in embodiment 2 of the present invention, three pairs of mating recesses 4e and 4f that open to opposite sides are formed on the front and back sides of the fastener 3, but it is also acceptable for only one pair to be formed, or for four or more pairs to be formed.

[0088] Furthermore, in the first and second embodiments of the present invention, the tubular body 2 is connected to the front surface portion 4a or the back surface portion 4c of the fastener 3, but the tubular body 2 may be connected to the side surface portion 4b.

[0089] Furthermore, in the first and third embodiments of the present invention, the fasteners 3 are connected to each other by EF joining, but they may be connected by, for example, engaging means such as an engaging claw and an engaging hole.

[0090] In addition, in embodiments 1 and 3 of the present invention, the two fasteners 3 are connected to each other, and then each tubular body 2 is connected to each fastener 3 to assemble the raft 1. However, the raft 1 may also be assembled by first connecting each tubular body 2 to each fastener 3, and then connecting the two fasteners 3 to each other.

[0091] Incidentally, the fastening device 3 in the first to third embodiments of the present invention is applied to fastening each tubular body 2 forming a circular ring shape, but it can also be applied to connecting straight tubular bodies 2 arranged in a lattice pattern when making floating bodies such as rafts and other fish pens. [Industrial Applicability]

[0092] The present invention is suitable for a float for fish and shellfish farming that is set afloat on the surface of water such as the sea, lake, or pond, and for a fastening device that fastens a plurality of tubular bodies that make up the float. [Explanation of symbols]

[0093] 1 Raft (floating body) 2 Tubular body 3 Binding tool 4e Fitting recess (fitted part) 4f Fitting recess (fitted part) 4g Fitting cylindrical part (fitted part) 5 Plastic Sheet

Claims

1. A fastener for fastening a plurality of tubular bodies constituting a floating body for fish and shellfish farming at a predetermined radial interval, The fastener and each of the tubular bodies are formed of a resin material and are connected to each other by electrofusion bonding or heat fusion bonding, the fastener is provided with a fitted portion into which the tubular bodies are fitted when the tubular bodies are connected, The fastener is characterized in that the fitted portion is a fitting recess into which the tubular body is fitted in the radial direction.

2. The fastener according to claim 1, The fastener is characterized in that a plurality of the fitted portions are arranged side by side at predetermined intervals in the radial direction of the tubular body when fitted to the fitted portions.

3. The fastener according to claim 1, The fastener is characterized in that at least one pair of the fitting recesses, which are open to opposite sides, are formed on the front and back sides of the fastener.

4. The fastener according to claim 1, A fastener characterized in that a surface of the fastener has a plurality of mating recesses that open toward the surface side of the fastener, the mating recesses being arranged side by side at predetermined intervals in the radial direction of the tubular body when mated with the mating recesses and in a direction perpendicular to the mating direction.

5. The fastener according to claim 4, A fastener characterized in that a back surface of the fastener has a plurality of mating recesses which open to the back surface side of the fastener and are arranged side by side at predetermined intervals in the radial direction of the tubular body when mated with the mating recesses and in a direction perpendicular to the mating direction.

6. A fastener for fastening a plurality of tubular bodies constituting a float for fish and shellfish farming at a predetermined radial interval, comprising: The fastener and each of the tubular bodies are formed of a resin material and are connected to each other by electrofusion bonding or heat fusion bonding, A fastener configured so that other fasteners other than the fastener itself can be connected to the fastener.

7. The fastener according to any one of claims 1 to 6, A fastener, characterized in that an electric heating wire for electrofusion bonding is embedded inside the fastener in a region corresponding to a position where the tubular bodies are connected.

8. The fastener according to any one of claims 1 to 6, A fastener comprising a resin sheet that is installable in an area of ​​the fastener that corresponds to the connection position of the tubular bodies and in which an electric heating wire for electrofusion bonding is embedded.

9. The fastener according to any one of claims 1 to 5, 7 and 8, A fastener configured so that other fasteners other than the fastener itself can be connected to the fastener.

10. A fastener according to any one of claims 1 to 9; A float for fish and shellfish farming, comprising a plurality of the tubular bodies fastened together by the fastening device.

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