JP3860885B2 - U-shaped hanging connector for oyster farming - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a U-shaped suspending connector for oyster culture for maintaining a fixed width when a wire for suspending a large number of oyster-culture shells is U-shaped and suspended from a shelf.
[0002]
[Prior art]
Oysters are cultivated via a wire suspended on an aquaculture ridge assembled on the sea. Specifically, oyster shells are attached to shells such as scallops that are held at predetermined intervals using PVC pipes or the like as vertical spacers on the wire, and one end of this wire is connected to a shelf of aquaculture rods, etc. Hang the end in the sea to grow.
[0003]
The length of this wire is determined by the distribution of plankton depth in the seawater, which is a nutrient source for oysters. In other words, plankton floats on the surface layer in the sea, and the number decreases below 10m in depth, and it has been confirmed that this will interfere with the growth of oysters. It is set to about 9m.
[0004]
And in the summer from May to September, as the sea water temperature rises, mussels that inhibit the growth of oysters breed in shallow water at a depth of 3m below the sea level, so the depth of water is less than 3m only during the summer. It must be hung so that the oyster is located at the top. For this reason, a wire with a total length of about 9 m, to which an oyster is attached, is connected and extended only during the summer, and the ends are suspended in a U-shaped state.
[0005]
By the way, in such a suspended form, the distance between the wires may increase due to the influence of waves, and in this case, adjacent oysters may collide and be damaged and damaged. Therefore, conventionally, the work of connecting both ends of the wire with the wire during the rehanging work has been performed on the saddle. This wire is a wire that has been made to pass through one end in advance. This wire is inserted into one end of the wire, and the other end is twisted with pliers or the like, and fixed to the other end of the wire. It was supposed to be a connector.
[0006]
[Problems to be solved by the invention]
However, it is necessary to tie wires to about 700 wires with one rod by hand, which requires considerable labor and time.
[0007]
In addition, when summer is over and the growth period of mussels is over, there will be no problem of oyster growth inhibition due to adhesion of mussels, so after cutting the wire, the connected 3m portion is pulled up and the original one The work of returning to the suspended state and making the arrangement interval between the wires moderate is performed, but the work for cutting the wire requires a considerable amount of force, which is troublesome.
[0008]
In addition, there is a risk of unexpected injury at the cutting edge after cutting the wire, and there is a similar concern during wire insertion work and twisting work with pliers etc. The number of wires to be carried at one time If there is a lot, it was heavy, and there were drawbacks such as being easy to rust.
[0009]
On the other hand, it is conceivable that the connector is simply made into a plastic in consideration of the problem in the metal wire, but in this case, a problem of disposal of the connector after use occurs. More specifically, there is a concern that plastic connectors that have been cut after use may float on the sea, contaminate the coast, or adhere to fishing nets, leading to environmental problems.
[0010]
The present invention provides a U-shaped hanging connector for oyster culture that is easy to mount and cut, is free of injury, is light and does not rust, and has little risk of environmental pollution. The purpose is that.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 of the present invention is a connector made of an injection-molded body of a biodegradable plastic, and both ends of a wire bent into a U-shape. A disc portion or ring portion having a through-hole to be further inserted, and a rod portion for integrally connecting the disc portion or the ring portion so as to have a predetermined interval and keeping the wire interval constant. It is characterized by the following. In this invention, the attachment work of the connector can be easily performed only by inserting the disk part or the ring part having a through hole into the suspension wire of the shell for oyster culture, and the cutting work is also performed by a normal paper cutting machine. Easy to use with scissors. In addition, unlike the wire, there is no sharp cut end, so there is no risk of injury, and because it is made of biodegradable plastic, it is light and does not rust, and there are many microorganisms after use. In a natural environment, the present invention is biodegraded by microorganisms present in seawater, so that problems such as marine pollution can be avoided.
[0012]
Of the present invention, the invention according to claim 2 is characterized in that the gate portion of the connector is injection-molded with the rod portion positioned substantially in the center. According to the present invention, cutting can be further easily performed by putting scissors in the gate portion, which is the most fragile portion of the structure, or tearing it manually.
[0013]
The invention according to claim 3 of the present invention is characterized in that the diameter of the rod portion is in the range of 2.0 mm to 5.0 mm. In the present invention, the above numerical values are limited for the following reason. If the diameter is less than 2.0 mm, there is a risk of cutting by the ocean current. On the other hand, if the diameter exceeds 5.0 mm, the flexibility is poor and the handling becomes difficult. Therefore, by setting the amount within the above range, the product is difficult to cut and easy to handle.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0015]
FIG. 1 shows a U-shaped hanging connector 1 for oyster culture according to the present invention. The connector 1 is a biodegradable plastic injection-molded body comprising a disc portion 2a having a through hole 2h, an opposing ring portion 2b, and a rod portion 3 integrally connected therebetween. Specifically, an aliphatic polyester-based biodegradable plastic (made by Showa Polymer Co., Ltd .: trade name Bionore # 1020) is injection-molded, and the outer diameter of the disk portion 2a and the ring portion 2b is about 20 mm. The thickness of the plate portion 2a is about 2.0 mm, the diameter of the through hole 2h is about 2.5 mm, the thickness of the ring portion 2b is 2.5 mm (the inner diameter of the ring portion 2b is 10 mm), and the diameter of the rod portion 3 is 2. The connector 1 having a total length of about 220 mm including 0.0 mm and the disc portion 2a and the ring portion 2b is produced.
[0016]
In addition, although the diameter of the rod part 3 is slightly different depending on the material resin if it is less than 2 mm, it becomes difficult to obtain a material having sufficient tensile strength, but if the thickness exceeds 5 mm, the rigidity of the product is excessive and the flexibility is poor. Since it becomes difficult to handle, it is preferably in the range of 2.0 mm to 5.0 mm, more preferably 2.0 mm to 3.0 mm.
[0017]
The biodegradable plastic used as the raw material for the connector 1 is not limited as long as it is a plastic that can be decomposed by the action of microorganisms in the natural environment, and in particular, the above-described aliphatic polyester, polylactic acid, poly Examples include caprolactone, a copolymer of hydroxybutyric acid and hydroxyvaleric acid, and the like. These may be added and mixed with a rubber component or the like for softening.
[0018]
Moreover, since the gate part 4 of the injection molding machine (not shown) is set in the approximate center of the rod part 3, this is the most fragile part. The tensile strength of the gate portion 4 is premised on having an initial strength that is not cut by work or by ocean currents, but by pulling the rod portion 3 strongly to the left and right manually, the gate portion 4 can be torn off. You can also
[0019]
FIG. 2 shows how to use the connector 1 described above. First, in (a), many scallop shells 6 are passed through the wire rope 5, and the height interval is kept constant by a spacer 7 made of a PVC pipe. The shell 6 is attached with oyster oysters. The upper end of the wire rope 5 is supported by a frame of a culture rod 8 disposed immediately above the sea surface WL, and oysters are grown by being suspended in a straight line in the sea.
[0020]
The tip depth of the wire rope 5 is set so as to be at a water depth of 9 m as described above. Moreover, the latching | locking part 5a is formed in the lower end part, and drop-off | omission of the spacer 7 and the shell 6 is prevented.
[0021]
Then, due to the arrival of summer such as May, the suspension work is carried out as shown in (b) in order to prevent adhesion of mussels that cause growth inhibition and secure a nutrient source. First, the wire rope 5 is once pulled up, and the through hole 2h of the disc portion 2a is fitted and inserted into the lower end of the wire rope 5 via a teg or the like, so that the connector 1 is attached to the wire rope 5.
[0022]
Further, after the ring portion 2b of the connector 1 is passed through the upper end side, a replenishment wire 9 is newly connected to both end sides, and this is hung around the cross of the culture rod 8 and hung in a fixed state. The wire rope 5 has a U-shape and is suspended in the sea again, so that the width interval is regulated by the rod portion 3 of the connector 1.
[0023]
In addition, the underwater length of the refilling wire 9 is set to about 3 m in order to prevent adhesion of mussels, and the oyster is suspended in a U-shape at a depth of 3 m or less.
[0024]
Although only one wire rope 5 is shown in the figure, the above operation is performed because the shells suspended from juveniles distributed in each aquaculture cage are densely arranged in one cage. A large number of wire ropes 5 as many as 700 are suspended in close contact with the rod 8 in the same form.
[0025]
In the shipping season preparation period at the beginning of autumn, the above-mentioned wire rope 5 is pulled up, the refilling wire 9 is cut off, and the rod portion 3 of the connector 1 is cut off with scissors or the like again (a As shown in FIG. In this case, the environment of the eutrophic state is reconstructed by re-dispersing and suspending each basket.
[0026]
As described above, the rod portion 3 may be torn off by manually pulling it left and right. In this case, since the gate part 4 which is the center part of the rod part 3 is the weakest in the rod part 3, it will be cut | disconnected by this gate part 4.
[0027]
Furthermore, as a usage form of the connector 1, one disk part 2a is previously attached to the lower end of the wire rope 5, and this is pulled up at the time of suspending work and the ring part 2b is passed through the upper end side of the wire rope 5. It can also be made U-shaped.
[0028]
Finally, the wire rope 5 is pulled up, the locking portion 5a is removed, and the shell 6 and the spacer 7 are dropped at once. At this time, the connecting tool 1 according to the present invention is slippery together with the shell 6 and the spacer 7 because it has better sliding properties than the conventional wire. Therefore, since the connector 1 does not remain on the wire rope 5, the rope 5 can be reused as it is.
[0029]
In addition, in this embodiment, although the connector 1 provided with the disc part 2a which has the through-hole 2h, and the ring part 2b was demonstrated, it is good also considering the both ends of one connector as the disc part 2a which has the through-hole 2h. However, the ring 2b is also included in the scope of the present invention. However, as in the present embodiment, it is preferable that at least the wire rope 5 attached to the lower end side is the disc portion 2 a having the through holes 2. This is because the disc portion 2a having the through hole 2h needs to directly support a shell such as a PVC pipe or a scallop used as the spacer 7 in the vertical direction. Therefore, the diameter of the through hole 2 h is preferably smaller than that of the spacer 7. Needless to say, the inner diameter of the ring portion 2b can be made smaller than that of the spacer 7.
[0030]
【The invention's effect】
As is apparent from the above description, in the U-shaped hanging connector for oyster culture according to the present invention, the attaching operation of the connector to the oyster hanging wire can be easily performed, and the scissors are also cut off. It can be cut easily by hand and by hand, and it is light and has no fear of injury, making it suitable for labor saving in lifting work and biodegrading by microorganisms in the sea after use. Marine pollution can be avoided.
[Brief description of the drawings]
FIG. 1 is a perspective view of a U-shaped suspension connector for oyster culture according to the present invention.
FIGS. 2A and 2B are schematic views showing a working mode using the connector. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 U-shaped hanging coupling tool 2a Disc part, 2b Ring part 3 Rod part 4 Gate part 5 Hanging wire rope 9 Supplementary wire

Claims (3)

A connector comprising a biodegradable plastic injection-molded body, a disk part or ring part having a through-hole inserted from both ends of a U-shaped wire, and the disk part Alternatively, the U-shaped suspension connector for oyster culture is characterized by comprising a rod portion for integrally connecting the ring portions so as to have a predetermined interval and maintaining the wire interval constant. The U-shaped hanging connector for oyster culture according to claim 1, wherein the gate portion of the connector is injection-molded with the gate portion positioned substantially at the center of the rod portion. The diameter of the said rod part exists in the range of 2.0 mm-5.0 mm, The U-shaped hanging connection tool for oyster culture of Claim 1 or 2 characterized by the above-mentioned.

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