JP2012130305A - Cultured scallop hanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and smoothly insert a rod shaft whose outer diameter is approximate to an ear hole diameter into an ear hole of an scallop without bending even if the ear hole diameter is small.SOLUTION: The rod shaft 11 has a plurality of slots 16 in the axial direction on the outer surface, and anti-loosening pieces 12 are cut and raised with a half on one side of each piece in the axial direction of the rod shaft 11 left unraised.

Description

  The present invention relates to a cultured scallop hanger used for scallop cultivation, and more particularly to a cultured scallop hanger in which a retaining piece for supporting a scallop is integrally provided near the tip of a rod shaft.

  As a method for culturing cultured scallops (hereinafter referred to as scallops), ear suspension culture is performed. For example, a method of hanging a knitted rope in which a scallop is attached in advance to a glue rope stretched in the sea is known. In this ear-hanging culture method, an ear hole of about 1.2 to 1.8 mm is opened in the ear part of the scallop, and this ear hole is tied with a synthetic resin string such as polyester or nylon called Tegus, and this string is stretched in the sea. The scallops are hung in the sea so that the scallops do not fall out of the strings, and are cultured (see, for example, Patent Document 1).

  However, this method requires 100 to 120 straps to be tied to a long rope (for example, 7 to 8 m) by hand, and scallops to each strap by hand. Therefore, there is a drawback that a lot of personnel and a lot of time are required for the work.

  On the other hand, in order to simplify the scallop suspension operation, a scallop suspension called a locking pin has been put into practical use. This scallop hanger is provided with a locking portion standing up like a return of a fishing hook for locking to an ear hole of a scallop shell at both ends of a thin rod-shaped shaft portion (rod shaft). By penetrating and holding the wire at the twisted portion of the rope so as to be orthogonal to the rope, a large number of the shaft portions are fixed at a predetermined pitch in the length direction of the rope. Then, the locking portions at both ends of each locking pin fixed to the rope are inserted and supported in the support holes (ear holes) provided in the ear piece portions of the scallops, and the rope is thrown into the sea in the same manner as described above. Aquaculture is carried out with scallops facing the sea (for example, see Patent Document 2).

  By the way, when the ear canal is opened in the ear piece of the scallop, the cutting powder generated by the drilling operation of the ear canal and the dust adhering to the surface of the scallop adhere to the ear canal and the periphery thereof. An opening area may become narrow. In such a case, it is difficult or impossible to smoothly insert the rod shaft of the locking pin into the ear hole, and there is a problem that the work efficiency of hanging the scallop is deteriorated.

  In order to improve the workability of hanging the scallops, an ear hole that is several percent larger than the diameter of the bar shaft of the locking pin is also drilled in the ear piece of the scallop. However, since the mantle is interposed between the two scallops, depending on the growth of the scallops, increasing the diameter of the pierced ear can significantly damage the mantle and adversely affect the growth of the scallops. There is a risk of giving. In particular, when the scallop is immature, the effect is great because the shell itself is thin and soft. For this reason, it is preferable to make the ear hole as small as possible. Furthermore, if the outer diameter of the rod shaft can be made close to the inner diameter size of the ear hole, the friction between the outer surface of the rod shaft and the inner surface of the ear hole can be reduced, and the durability of the rod shaft can be improved.

Japanese Utility Model Publication No. 6-75156 JP 2002-171862 A

  However, as described above, in order to prevent the scallop growth from being adversely affected and to improve the durability of the rod shaft, when the ear hole is narrowed (inner diameter is reduced), the locking pin is inserted into the ear hole. If the insertion direction of the rod shaft is slightly shifted in the ear canal, the insertion may not be smooth and the vicinity of the tip of the rod shaft may be bent in the ear canal. In such a case, the operator has to remove the rod shaft from the ear hole, re-bend the bent shaft, and then re-insert it, resulting in a problem that the working efficiency for hanging the scallop is extremely deteriorated. .

  The present invention has been made in view of the above-described circumstances, and its purpose is to easily and smoothly move a rod shaft having an outer diameter close to the ear hole diameter into the ear hole even when the ear hole diameter of the scallop is small. It is an object of the present invention to provide a suspended scallop hanger that can be inserted so as not to be bent.

In order to achieve the above-mentioned object, the suspension tool for cultured scallops according to the present invention includes both end portions of a rod shaft formed to have the same diameter as or slightly smaller than the inner diameter of the ear hole drilled in the ear piece of the cultured scallop. In the vicinity, the retaining pieces of the shape that is cut toward the tip end side of the rod shaft to raise the cut pieces are the suspension tools for the cultured scallops that are integrally projected,
The rod shaft has a plurality of protrusions (ribs) formed along the axial direction on the outer peripheral surface,
A cross-sectional shape of the cut piece is a shape obtained by cutting a part of an arc of a partial circle with a line segment perpendicular to the chord.

  With this configuration, the plurality of protrusions formed on the outer periphery of the rod shaft increases the bending resistance (waist strength) of the rod shaft into the plane perpendicular to the longitudinal direction. For this reason, when the rod shaft is inserted from the tip into the ear hole of the scallop, it can be avoided that the rod shaft is bent or buckled in the vertical plane, and it is easy even for the ear hole having a small inner diameter. In addition, the rod shaft can be inserted smoothly.

  Further, when the outer diameter of the rod shaft is set to be approximately equal to the inner diameter of the ear hole formed in the ear piece of the cultured scallop, when the rod shaft is inserted into the ear hole, Even if cutting powder generated at the time of drilling or dust attached to the surface of the scallop may adhere, these cutting powder or the like in the long groove formed between the plurality of protrusions on the outer periphery of the rod shaft. Since dust is taken in or discharged from the ear canal via the long groove, the operation of inserting the rod shaft into the ear canal can be made smooth and easy. Therefore, even when the inner diameter of the ear hole is small, the outer diameter of the rod shaft can be brought close to the inner diameter of the ear hole, and wear and damage of the rod shaft due to mutual frictional contact can be effectively suppressed. Durability can be increased. In addition, by suppressing the inner diameter of the ear canal, it is possible to prevent or minimize the damage to the mantle of the scallop shell when the ear hole is drilled, thereby preventing the growth of the scallop shell from being hindered.

  Furthermore, in the above-described configuration, the cross-sectional shape of the cut piece that is the retaining piece is a shape obtained by cutting a part of the arc of the partial circle with a line segment perpendicular to the string, so that the retaining piece is not cut and raised. The portion left adjacent to the piece can function as a reinforcing rib extending in the longitudinal direction of the rod shaft, and avoids bending and buckling of the rod shaft into a plane perpendicular to the longitudinal direction of the rod shaft. be able to.

  Moreover, in the said structure, the said protrusion is formed in the outer periphery of the said rod shaft in the range of 10-25, The bending resistance to the outward in the surrounding surface of a rod shaft is raised, and strength with respect to bending and bending Can be raised appropriately.

  Furthermore, in the above configuration, by curving the retaining piece in a circular arc shape by curving toward the tip end side of the rod shaft, once the ear hole of the scallop is once inserted through the rod shaft, The arc-shaped portion is restored by its own repulsive force so as to project outward in an arc shape, so that the ear hole does not come out of the rod shaft, and the scallop is stably held on the rod shaft.

  According to the present invention, even when the ear hole diameter of the scallop is small, the rod shaft having an outer diameter close to the ear hole diameter can be easily and smoothly inserted into the ear hole without causing bending or digging. be able to.

It is a front view which shows the suspension tool of the cultured scallop by embodiment of this invention. FIG. 2 is a rear view of the scallop hanger shown in FIG. 1. It is a top view of the suspension tool of the cultured scallop shown in FIG. It is a bottom view of the hanging tool of the cultured scallop shown in FIG. FIG. 2 is a left side view of the suspended scallop hanger shown in FIG. 1. It is a right view of the suspension tool of the cultured scallop shown in FIG. It is a front view of the principal part which expands and shows the suspension tool of the cultured scallop shown in FIG. It is an expanded sectional view in the AA line of FIG. It is an expanded sectional view in the BB line of FIG. It is an expanded sectional view in the CC line of FIG. It is a front view of the use condition of the hanging tool shown in FIG.

  Hereinafter, a suspended scallop suspension according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11.

  The cultured scallop suspension A of this embodiment is composed of a thin rod shaft 11 having a predetermined length obtained as a molded product of synthetic resin. The rod shaft 11 has a circular cross section over its entire length, and has a shaft portion main body 11a having a predetermined length and tapered portions 11b continuous to both ends of the shaft portion main body 11a. Each tapered portion 11b is pointed toward the tip 11c, and the outer diameter of the tip 11c is, for example, ½ or less of the outer diameter of the shaft portion main body 11a. Further, the outer diameter of the shaft main body 11a is set to a size that can be inserted in contact with an ear hole formed in an ear piece of a scallop described later.

The shaft main body 11a in the vicinity of each taper portion 11b of the rod shaft 11 is cut with a predetermined length and a predetermined width toward the distal end side of the rod shaft, leaving one axial half (end portion in the distal direction). Thus, a retaining piece 12 having a shape in which the cut piece is raised is formed.
In order to obtain this retaining piece 12 that is curved in an arc shape by curving toward the tip end side of the rod shaft 11, as shown in FIGS. A vertical notch surface 13a, a horizontal notch surface 13b, and an inclined notch surface 13c are formed by cutting with one vertical surface, one horizontal surface, and one inclined surface that intersect each other.
By forming these cut-out surfaces 13a to 13c, the retaining piece 12 having one end continuous with a part of the shaft body 11a is formed. Similarly, notch surfaces 13a to 13c similar to those described above are formed at the other end of the rod shaft 11, and the retaining piece 12 is formed.

These retaining pieces 12 are cut away from the shaft main body 11a at the cut-out surfaces 13a to 13c so that the front end portion is cut out over a predetermined length to have a short size, and the front end 12a has a smooth arc surface. It has become. Further, the retaining piece 12 has a shape that warps in a substantially arc shape outward of the rod shaft 11 within a plane perpendicular to the center line of the rod shaft 11, and is given elasticity. Accordingly, these retaining pieces 12 normally protrude outward from the rod shaft 11, but when external force is applied, they fall down into the notch surfaces 13a to 13c and can be lifted up when the external force is released. ing. Further, the center of the arc is unevenly distributed (outward) from the center line of the rod shaft 11. The retaining piece 12 can be formed at the same time as the resin molding of the rod shaft 11 without being formed by the notches in the notch surfaces 13a to 13c.
As described above, the cross-sectional shape of each part of the retaining piece 12 has a shape obtained by cutting a part of the arc of the partial circle with a line segment perpendicular to the string, for example, a substantially quadrant fan shape except for the cut end of the tip. Therefore, when inserted into the ear hole formed in the ear piece of the cultured scallop, the stopper piece 12 is pressed against the horizontal cut surface 13b along the vertical cut surface 13a of the rod shaft 11, The cross-sectional shape is almost the same as the outer shape of the rod shaft 11.

  On the rod shaft 11, a single rope locking piece 14 protrudes at a position that is symmetrical (axisymmetric) with respect to the center line (virtual line) between both ends of the rod shaft 11 (relative to the total length). Yes. These rope locking pieces 14 are raised so as to be inclined at the same angle so as to face each other toward the outside of the rod shaft 11. These rope locking pieces 14 are smaller (thin) in cross-sectional area than the rod shaft 11, but are thicker and stronger than the retaining pieces 12. In addition, the rope locking piece 14 can be integrally provided on the rod shaft 11 by the resin molding, and similarly to the retaining piece 12, the rope locking piece 14 is formed so as to be cut and caused. You can also.

  Further, on the outer peripheral surface of the rod shaft 11, a protrusion having an arcuate cross section extending straight along the longitudinal direction of the rod shaft 11 over the entire length excluding the distal end portion of the rod shaft 11 or the entire length including the distal end portion. 15 is formed, and a plurality of long grooves 16 are formed between the protrusions 15. These protrusions 15 function as reinforcing ribs that prevent the rod shaft 11 from bending. In the present embodiment, as shown in FIGS. 7 to 10, these long grooves 16 extend from the shaft body 11a in the vicinity of the tapered portion 11b as the tip of the rod shaft 11 to the center of the shaft body 11a. Are provided continuously.

  8 to 10 are end views of the rod shaft 11 cut at three points in the longitudinal direction. FIG. 8 is a cross-sectional view of the rod shaft 11 of FIG. 7 cut along the line AA, and a plurality of long grooves 16 are provided on the outer peripheral surface of the shaft body 11a excluding the inclined notch surface 13c. FIG. 9 is a cross-sectional view of the rod shaft 11 of FIG. 7 cut along the line BB, and the outer peripheral surface (arc surface) of the retaining piece 12 excluding the surface facing the notch surfaces 13a to 13c. And the said protrusion 15 and the long groove | channel 16 are provided in the outer peripheral surface of the axial part main body 11a at equal intervals. Further, FIG. 10 is a cross-sectional view showing the rod shaft 11 cut along a line CC, in which the protrusions 15 and the long grooves 16 are provided at equal intervals on the entire peripheral surface of the shaft body 11a.

  The outer diameter of the shaft body 11a includes the height of the ridge 15 and is approximately equal to the inner diameter of an ear hole drilled in an ear piece of a scallop described below. The tip 11c of the rod shaft 11, that is, the minimum diameter portion of the tapered portion 11b is sufficiently smaller than the inner diameter of the ear hole.

  Next, the usage method of the hanging tool A which becomes this structure is demonstrated. First, the suspension tool A shown in FIGS. 1 to 6 is prepared, and one end 11 c of the rod shaft 11 in the suspension tool A is inserted into the twist of the rope 21. This insertion operation is performed until the rope 21 is positioned between the two rope locking pieces 14 and 14. At this time, the rope locking piece 14 and the retaining piece 12 on the tip 11c side do not stand up in the direction against the insertion into the stitch, and thus are pinched and pushed down by the stitch.

  Therefore, the rope locking piece 14 and the retaining piece 12 pass smoothly through the stitch. The rope locking piece 14 that has passed through the rope 21 rises and returns again, and the rope 21 is interposed between the rope locking piece 14 that does not pass through the rope 21. For this reason, both rope locking pieces 14 are in a state of rising in the direction opposite to the direction of exiting from the stitch, and the shaft body 11a moves in the axial direction in response to external force even if it is moved in any axial direction. Even if you do not get out of the stitch. Therefore, the hanging tool A is stably supported without inadvertently coming out of the rope 21.

  Therefore, the tips 11c of the tapered portions 11b at both ends of the rod shaft 11 supported by the rope 21 in this way are inserted into the ear holes 24 previously drilled in the ear pieces 23 of the two shells of the scallop 22. . This piercing operation is performed until the retaining piece 12 passes (penetrates) through the ear hole 24. When the retaining piece 12 passes through the ear hole 24, the retaining piece 12 passes smoothly without standing in the direction opposite to the passage of the ear hole 23, and falls when the ear hole 24 passes. After the ear hole 24 passes, the fall-off retaining piece 12 that has fallen rises up to be restored by its own repulsive force. For this reason, the scallop 22 is held between the retaining piece 12 and the rope locking pieces 14, 14 and is retained by the retaining piece 12 erected in the direction against the ear hole 24 removal operation. FIG. 11 shows this retaining condition.

  By the way, during the operation of inserting the rod shaft 11 into the ear hole 24, the cutting powder of the shell or the dust attached to the surface of the scallop 22 by the drilling of the ear hole 24 using a drill or the like enters the ear hole 24 after the drilling. May stick or remain. In this case, as described above, the tip 11c of the rod shaft 11 and the vicinity thereof may not be smoothly inserted into the ear hole 24 or may not be inserted.

  In the present invention, as described above, by providing a plurality of long grooves 16 along the longitudinal direction of the outer periphery of the rod shaft 11, when inserting the tip of the rod shaft 11 into the ear hole 24, The cutting powder and fine dust of the scallops 22 remaining in the ear hole 24 are taken into the long groove 16, and the taken cutting powder and dust are discharged from the ear hole 24 through the long groove 16. For this reason, the insertion of the tip end portion of the rod shaft 11 into the ear hole 24 can be carried out easily and smoothly. Thus, it becomes unnecessary to make the diameter of the ear hole 24 formed in the ear piece 23 of the scallop 22 larger than necessary (expand) as in the prior art.

  In addition, the above-described configuration can prevent damage to the mantle in the scallop 22 due to the drilling of the ear hole 24 and the growth failure of the scallop 22 due to this damage, and the rod shaft 11 slides and frictions in the ear hole 24. As a result, it is possible to avoid wear and deformation of the ear hole 24 and further damage. Further, since the long groove 16 can be obtained at the same time as the resin molding by the mold of the lifting tool A, it is not necessary to separately prepare a jig or a device for cutting and raising the retaining piece 12, and the lifting tool The manufacturing cost of A can be suppressed.

  Since the protrusion 15 functions as a reinforcing rib that strengthens the waist of the entire rod shaft 11, the insertion operation into the ear hole 24 can be performed quickly and easily without causing bending or buckling. Thereby, it becomes possible to cope with the automation of the insertion work, and the suspension work of the scallops 22 with respect to the rope 21 can be further accelerated. Further, the structure of the fishing tackle A is very simple, and a plurality (for example, 10,000 pieces) of these fishing tackle A can be obtained quickly and inexpensively by integrally molding the resin.

  As described above, the suspended scallop hanger A of the present embodiment has a configuration in which the retaining piece 12 that is curved so as to bend outward is integrally provided in the vicinity of the distal end portion of the rod shaft 11. By providing a plurality of protrusions 15 along the longitudinal direction of the rod shaft 11 over the entire length excluding the tip portion or the entire length including the tip portion of the outer peripheral surface of the rod shaft 11, the rod shaft with respect to the longitudinal direction is provided. 11 bending resistance (waist strength) can be increased. As a result, when the rod shaft 11 is inserted from the tip 11c into the ear hole 24 of the scallop 22, it can be avoided that the rod shaft 11 is bent or buckled in the vertical plane. In addition, the rod shaft 11 can be inserted smoothly.

  In addition, since the outer diameter of the rod shaft 11 is set to be approximately equal to the inner diameter of the ear hole 24 formed in the ear piece 23 of the scallop 22, the inner and outer sides of the ear hole 24 are inserted when the rod shaft 11 is inserted into the ear hole 24. Even when cutting powder generated at the time of drilling the ear hole 24 or dust attached to the surface of the scallop 22 is attached to the plurality of long grooves 16 on the outer periphery of the rod shaft 11, The operation of inserting the rod shaft 11 into the ear hole 24 can be facilitated by taking in the dust or guiding it to be discharged out of the ear hole 24.

  Furthermore, the retaining piece 12 is cut and raised toward the outside of the rod shaft 11 leaving one half of the rod shaft 11 in the axial direction (end portion in the front end direction). The portions remaining on both sides of the rod shaft 11 without being cut and raised function as reinforcing ribs extending in the longitudinal direction of the rod shaft 11, and the bending resistance of the rod shaft 11 can be increased. It can contribute to avoiding cramping.

  The said structure WHEREIN: By forming the said protrusion 15 in the outer periphery of the rod axis | shaft 11 in the range of 10-25, the bending resistance to the outward in the surrounding surface of the rod axis | shaft 11 is raised, and strength with respect to bending and bending | flexion Can be raised appropriately.

  Then, by curving the retaining piece 12 in an arc shape toward the outside, once the ear hole 24 of the scallop 22 is inserted through the rod shaft 11 through the arc-shaped portion, the arc-shaped portion is It is restored by its own repulsive force so as to project outward in an arc shape. Therefore, the ear hole 24 does not come out of the rod shaft 11, and the scallop 22 is stably held (suspended) on the rod shaft 11. The

  The present invention has an effect that even when the ear hole diameter of the scallop is small, the rod shaft having an outer diameter close to the ear hole diameter can be easily and smoothly inserted into the ear hole without causing bending or the like. And is useful for a suspended scallop for cultivating scallops in which a retaining piece is integrally provided near the tip of the rod shaft.

A Lifting tool 11 Bar shaft 11a Shaft body 11b Taper portion 11c Tip 12 Retaining piece 13a Vertical notch surface 13b Horizontal notch surface 13c Inclined notch surface 14 Rope locking piece 15 Projection 16 Long groove 21 Rope 22 Scallop 23 Ear piece 24 Ear hole

Claims (4)

Incision toward the tip of the bar shaft is made in the vicinity of both ends of the rod shaft formed to be the same diameter as the inner diameter of the ear hole drilled in the ear piece of the cultured scallop or slightly smaller diameter. The retaining piece of the rubbed shape is a hanging tool for cultured scallops that are integrally projected.
The rod shaft is formed with a plurality of protrusions along the axial direction on the outer peripheral surface,
A cross-sectional shape of the cut piece is a shape obtained by cutting a part of an arc of a partial circle with a line segment perpendicular to the string.   2. The cultured scallop hanger according to claim 1, wherein a cross-sectional shape of the cut piece is a substantially quadrant fan shape except for the tip.   The said ridge is formed in the outer periphery of the said rod axis | shaft in the range of 10-25, The suspension tool of cultured scallops of Claim 1 characterized by the above-mentioned.   2. The cultured scallop hanger according to claim 1, wherein the retaining piece is bent in a circular arc shape by curving toward the tip end side of the rod shaft.

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