Retaining tool

Abstract

To provide a coming-off prevention tool that is excellent in durability.SOLUTION: A coming-off prevention tool 10 comprises: a first pinching part 20; a second pinching part 30; and a stainless steel round bar 50. The second pinching part 30 is connected with the first pinching part 20 to have approximately mirror symmetry having a certain spacing to the first pinching part 20 with respect to a virtual plane 60 as a reference. The first pinching part 20 includes a first contact region 21 and a first pivot region 22, and the second pinching part 30 includes a second contact region 31 and a second pivot region 32. A first through hole 20A is formed in the first pivot region 22, and a second through hole 30A is formed in the second region 32. A radial direction 30B of the second through hole 30A is an oblique direction to a straight line 70 joining the first through hole 20A and the second through hole 30A to have approximately mirror symmetry to a radial direction 20B of the first through hole 20A. A radial direction 20B of the first through hole 20A is also an oblique direction to the straight line 70.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a retaining device. Specifically, for example, it relates to a retaining device for preventing a ring for preventing the attachment of shellfish to a support column from coming off the support column.

Background Art

[0002] There are two types of seaweed cultivation: "pole-type seaweed cultivation" in which poles are erected on the seabed and seaweed nets are stretched near the sea surface, and "floating seaweed cultivation" in which seaweed nets are tied to buoys and floated on the sea surface.

[0003] In Ariake Sea, Japan, the tidal range is up to 6 m, and there are vast tidal flats. Therefore, pole-type seaweed cultivation is actively carried out along the coast of Ariake Sea. This is because the tidal flat has a shallow water depth, making it easy to erect poles. Also, by utilizing the maximum tidal range of 6 m, the seaweed can be immersed in seawater at high tide to absorb the nutrients of the seawater, and at low tide, the seaweed can be lifted above the sea surface to receive sunlight, storing umami in the seaweed and making it less susceptible to diseases.

[0004] In addition, shellfish such as barnacles tend to attach to places in contact with seawater such as the quay walls of ports. Also, in pole-type seaweed cultivation, since the poles are in contact with seawater, shellfish such as barnacles tend to attach to the poles. When a large number of shellfish such as barnacles attach to the poles, it becomes difficult to adjust the suspension ropes hanging the seaweed nets, and it becomes difficult to lift the seaweed above the sea surface.

[0005] Therefore, various techniques have been proposed for scraping off shellfish such as barnacles attached to the poles. For example, Patent Document 1 describes a shellfish attachment prevention device shown in FIG. 7.

[0006] That is, the shellfish attachment prevention device 501 described in Patent Document 1 has a ring shape that can be loosely fitted onto the support column 500 according to the shape of the support column 500. In addition, the shellfish adhesion prevention device 501 is attached to the support 500 so that the inner peripheral surface 521 of the shellfish adhesion prevention device 501 can contact the surface of the support 500. Moreover, a protruding portion 522 is formed on an inner peripheral surface 521 of the shellfish adhesion prevention device 501 .

[0007] In addition, the shellfish adhesion prevention device 501 is a buoyant body that floats near or below the water surface and moves up and down due to tidal currents and the ebb and flow of the ocean, and during this movement it comes into contact with or collides with the support 500, scraping off the shellfish attached to the surface of the support 500. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2004-293155 A Summary of the Invention [Problem to be solved by the invention]

[0009] However, because the ring-shaped shellfish attachment prevention device is not fixed to the support and moves up and down along the support, it can fall off the support. Once it does fall off, it is difficult to find it because the surrounding area is the vast ocean.

[0010] As a result, a measure has been taken in which a bamboo skewer extending in a direction approximately perpendicular to the extension direction of the support pole is attached to the support pole using rubber or the like, so that even if the shellfish attachment prevention device tries to come off the support pole, it will hit the bamboo skewer and not come off.

[0011] However, there was a problem in that as the rubber deteriorated, the bamboo skewers would come loose, and when the skewers came loose, the shellfish attachment prevention device lost its ability to prevent the skewers from coming loose. Furthermore, the deteriorated rubber itself would come off the posts, and in addition to the bamboo skewers, the deteriorated rubber would also become garbage, causing a negative impact on the environment.

[0012] Therefore, there has been a demand for a highly durable retainer.

[0013] The present invention was devised in view of the above points, and an object thereof is to provide a retaining tool having excellent durability.

Means for Solving the Problems

[0014] In order to achieve the above object, the retaining tool of the present invention includes a first clamping portion in which a first through hole is formed, and is connected to the first clamping portion so as to be substantially mirror-symmetrical with a predetermined virtual plane as a reference and at a distance from the first clamping portion. A second clamping portion in which a second through hole is formed at a position substantially mirror-symmetrical with the first through hole of the first clamping portion with respect to the virtual plane, and the second through hole is formed with respect to a straight line connecting the first through hole and the second through hole so as to be substantially mirror-symmetrical with the radial direction of the first through hole. And a rod that extends linearly and is insertable into the first through hole of the first clamping portion and the second through hole of the second clamping portion and has a predetermined length.

[0015] Here, when a predetermined force is applied by the first clamping portion and the second clamping portion that is connected to the first clamping portion so as to be substantially mirror-symmetrical with a predetermined virtual plane as a reference and at a distance from the first clamping portion, the first clamping portion and the second clamping portion move from the position in a state where no predetermined force is applied about the connection portion between them, that is, approach or separate from each other, and an object to be clamped can be clamped between the first clamping portion and the second clamping portion.

[0016] Further, the object to be retained hits the rod, and the movement of the object to be retained can be restricted by the rod that extends linearly and is insertable into the first through hole of the first clamping portion and the second through hole of the second clamping portion and has a predetermined length. Here, the “predetermined length” means a length sufficient to hit the object to be retained and restrict the movement of the object to be retained.

[0017] Further, with reference to the virtual plane, a second through-hole is formed at a position that is substantially mirror-symmetrical to the first through-hole of the first clamping portion. The radial direction of the second through-hole is an oblique direction with respect to the straight line connecting the first through-hole and the second through-hole, such that it is substantially mirror-symmetrical to the radial direction of the first through-hole. As a result, the radial direction of the first through-hole is also an oblique direction with respect to the straight line connecting the first through-hole and the second through-hole, but is substantially mirror-symmetrical to the radial direction of the second through-hole. When no predetermined force is applied to the first clamping portion and the second clamping portion, the edges of the first through-hole and the second through-hole can be pressed against the inserted rod body to fix the rod body.

[0018] Here, the direction in which the straight line connecting the first through-hole and the second through-hole extends is the same as the direction in which the rod body inserted into the first through-hole and the second through-hole extends. Also, the "straight line" mentioned here is an imaginary straight line without a physical entity.

[0019] In addition, since the first clamping portion and the second clamping portion can approach or separate from each other with the connection point between them as the axis, the angles of the radial directions of the first through-hole and the second through-hole respectively with respect to the direction in which the inserted rod body extends can be changed, and the edges of the first through-hole and the second through-hole can be pressed against or released from the rod body. Here, the fixation of the rod body can be released by releasing the pressure of the edges of the first through-hole and the second through-hole against the rod body.

[0020] In addition, in order to achieve the above object, the anti-loosening device of the present invention includes a first clamping portion having a first through hole, and is connected to the first clamping portion at an interval so as to be able to clamp an object to be clamped between the first clamping portion and the first clamping portion. A second through hole is formed at a position substantially mirror-symmetrical to the first through hole of the first clamping portion with respect to a predetermined virtual plane. The radial direction of the second through hole is an oblique direction with respect to a straight line connecting the first through hole and the second through hole so as to be substantially mirror-symmetrical to the radial direction of the first through hole. And a rod body that extends linearly and can be inserted into the first through hole of the first clamping portion and the second through hole of the second clamping portion and has a predetermined length.

[0021] Here, when a predetermined force is applied by the first clamping portion and the second clamping portion that is connected to the first clamping portion at an interval so as to be able to clamp an object to be clamped between the first clamping portion and the first clamping portion, the first clamping portion and the second clamping portion move from the position in the state where no predetermined force is applied around the connection point between them, that is, move closer to or away from each other, and an object to be clamped can be clamped between the first clamping portion and the second clamping portion.

[0022] In addition, the object to be prevented from coming off hits the rod body, and the movement of the object to be prevented from coming off can be restricted by the rod body that extends linearly and can be inserted into the first through hole of the first clamping portion and the second through hole of the second clamping portion and has a predetermined length. Here, the "predetermined length" means a length sufficient to hit the object to be prevented from coming off and restrict the movement of the object to be prevented from coming off.

[0023] Further, a second through hole is formed at a position substantially mirror-symmetrical to the first through hole of the first clamping portion with respect to a predetermined virtual plane. The radial direction of the second through hole is an oblique direction with respect to the straight line connecting the first through hole and the second through hole, so that the radial direction of the first through hole is also an oblique direction with respect to the straight line connecting the first through hole and the second through hole, but is substantially mirror-symmetrical to the radial direction of the second through hole. When no predetermined force is applied to the first clamping portion and the second clamping portion, the edges of the first through hole and the second through hole can be pressed against the inserted rod to fix the rod.

[0024] Here, the direction in which the straight line connecting the first through hole and the second through hole extends is the same as the direction in which the rod inserted into the first through hole and the second through hole extends. Also, the "straight line" mentioned here is a virtual straight line without an entity.

[0025] Further, since the first clamping portion and the second clamping portion can approach and separate from each other with the connection portion between them as an axis, the angles of the radial directions of the first through hole and the second through hole respectively with respect to the direction in which the inserted rod extends can be changed, and the edges of the first through hole and the second through hole can be pressed against or not pressed against the rod. Here, the fixing of the rod can be released by not pressing the edges of the first through hole and the second through hole against the rod.

[0026] Also, in the anti-loosening device of the present invention, a plurality of first through holes are formed between the connection portion of the first clamping portion and the second clamping portion and the edge portion of the first clamping portion on the side opposite to the connection portion, and a plurality of second through holes are formed between the connection portion of the first clamping portion and the second clamping portion and the edge portion of the second clamping portion on the side opposite to the connection portion, and each of the plurality of rods can be configured to be insertable into each of the plurality of first through holes and second through holes.

[0027] In this case, since the space between the first clamping part and the second clamping part where the object to be clamped, for example, a support column, is located can be narrowed by a plurality of rods, it is possible to cope even if the object to be clamped becomes smaller. Also, even if one rod accidentally falls out of the first through-hole and the second through-hole, since there are other rods, the effect of preventing the rod from falling out can be maintained.

[0028] Furthermore, in the retainer of the present invention, the first clamping part has a first contact region that is convexly curved in a direction opposite to the second clamping part, and a substantially flat first guiding region that is located between the connection portion of the first clamping part and the second clamping part and the first contact region and in which the first through-hole is formed. The second clamping part can have a second contact region that is convexly curved in a direction opposite to the first clamping part, and a substantially flat second guiding region that is located between the connection portion of the first clamping part and the second clamping part and the second contact region and in which the second through-hole is formed.

[0029] In this case, the first clamping part and the second clamping part can sufficiently contact an object to be clamped, for example, a support column having a curved surface. Furthermore, due to small movements of the first clamping part and the second clamping part respectively, the edge of the first through-hole or the edge of the second through-hole of the rod can be pressed against or released from the rod.

[0030] Also, in the retainer of the present invention, when the first clamping part and the second clamping part are formed of a single metal plate, when a predetermined force is applied to the first clamping part and the second clamping part, a reaction force that tends to return the first clamping part and the second clamping part to a certain position around their connection portion like a leaf spring easily acts.

[0031] Also, in the retainer of the present invention, a first edge region, which is a region within a predetermined range from the edge of the first clamping part on the side opposite to the connection portion of the first clamping part and the second clamping part, and a second edge region, which is a region within a predetermined range from the edge of the second clamping part on the side opposite to the connection portion of the first clamping part and the second clamping part, can each be configured to be convexly curved toward a virtual plane.

[0032] In this case, it becomes easier to attach the retaining member of the present invention to an object to be clamped having a curved surface, for example, a column.

[0033] Further, in the retaining member of the present invention, the edge of the first clamping portion and the edge of the second clamping portion may be configured to be located within a virtual circle inscribed in the concave curved surface of the first clamping portion and the concave curved surface of the second clamping portion, respectively.

[0034] In this case, when the retaining member of the present invention is attached to an object to be clamped, for example, a column, the edge of the first clamping portion and the edge of the second clamping portion are caught on the surface of the column, and the first clamping portion and the second clamping portion are pushed in a direction opposite to the column with the connection point between them as an axis. Therefore, a force that causes the first clamping portion and the second clamping portion to return toward the column is generated, and the force for clamping the column is improved.

[0035] Further, in the retaining member of the present invention, the rod body has a bent portion, the bent portion is configured such that a part of the rod body is bent in one direction, and between one end of the rod body and the bent portion and between the other end opposite to one end of the rod body and the bent portion, they extend linearly at a predetermined angle to each other at the bent portion. The rod body has a grip portion, and the grip portion is connected to one end of the rod body and extends in a direction substantially orthogonal to the direction in which the rod body extends linearly.

[0036] In this case, the grip portion makes it easier to rotate the rod body inserted through the first through hole and the second through hole about the straight line connecting the first through hole and the second through hole as the rotation central axis.

[0037] Further, due to the bent portion, the portion between one end of the rod body and the bent portion and the portion between the other end opposite to the one end of the rod body and the bent portion each extend linearly at a predetermined angle with respect to each other at the bent portion. When the rod body inserted through the first through hole and the second through hole is rotated, the angle of the direction in which the rod body extends with respect to the radial direction of the first through hole and the radial direction of the second through hole can be changed. Therefore, the rod body can be pressed against the edge of the first through hole and the edge of the second through hole so that the first clamping portion and the second clamping portion approach each other. For example, the first clamping portion and the second clamping portion can be further pressed against a support column. Here, the degree of bending of the bent portion, that is, the predetermined angle at the bent portion, is such that the rod body can be inserted through the first through hole and the second through hole.

Advantages of the Invention

[0038] The anti-loosening device according to the present invention is excellent in durability.

Brief Description of the Drawings

[0039]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0040] Hereinafter, embodiments of the present invention will be described with reference to the drawings to facilitate understanding of the present invention. FIG. 1(a) is a schematic cross-sectional view of the retaining tool according to the first embodiment to which the present invention is applied, and FIG. 1(b) is a schematic plan view of the retaining tool according to the first embodiment to which the present invention is applied.

[0041] The retaining tool 10 according to the first embodiment of the present invention shown in FIG. 1 includes a first clamping portion 20. In addition, the retaining tool 10 of the present invention includes a second clamping portion 30.

[0042] Here, the second clamping portion 30 is connected to the first clamping portion 20 so as to be substantially mirror-symmetrical with a space from the first clamping portion 20 with respect to the virtual plane 60. Further, the first clamping portion 20 and the second clamping portion 30 are formed of a single stainless steel plate.

[0043] In addition, the first clamping portion 20 has a first contact region 21. Here, the first contact region 21 is curved convexly in a direction opposite to the second clamping portion 30.

[0044] In addition, the first clamping portion 20 has a first essential region 22. Here, the first key area 22 is located between the connection point 40 of the first clamping part 20 and the second clamping part 30, and the first contact area 21. Also, the first key area 22 is substantially flat plate-shaped, and a first through hole 20A is formed therein.

[0045] Also, the second clamping part 30 has a second contact area 31. Here, the second contact area 31 is convexly curved in a direction opposite to that of the first clamping part 20. Also, the first contact area 21 and the second contact area 31 have substantially the same curvature as each other.

[0046] That is, the mutually facing surfaces of the first contact area 21 of the first clamping part 20 and the second contact area 31 of the second clamping part 30 are curved so as to be able to contact the circumference of a single common circle. In the space surrounded by the first contact area 21 of the first clamping part 20 and the second contact area 31 of the second clamping part 30, for example, a cylinder with an outer diameter of 4.5 cm can be arranged, but it is of course not limited to this.

[0047] At this time, it is preferable to arrange a cylinder having an outer diameter slightly larger than the straight-line distance connecting the mutually facing surfaces of the first contact area 21 and the second contact area 31, that is, the inner diameter. This is because a reaction force is generated on the first clamping part 20 and the second clamping part 30, which are composed of a single stainless steel plate, and the first contact area 21 and the second contact area 31 firmly clamp the cylinder.

[0048] Also, the second clamping part 30 has a second key area 32. Here, the second key area 32 is located between the connection point 40 of the first clamping part 20 and the second clamping part 30, and the second contact area 31.

[0049] Also, the second key area 32 is substantially flat plate-shaped, and a second through hole 30A is formed therein. Also, the second through hole 30A is formed at a position substantially mirror-symmetrical to the first through hole 20A of the first clamping part 20 with respect to the virtual plane 60.

[0050] Further, a region within a predetermined range from the edge of the first clamping portion 20 on the side opposite to the connection portion 40, for example, a region about 3 mm from the edge, is curved convexly toward the virtual plane 60, forming a first curved edge region 21A. Also, a region within a predetermined range from the edge of the second clamping portion 30 on the side opposite to the connection portion 40, for example, a region about 3 mm from the edge, is curved convexly toward the virtual plane 60, forming a second curved edge region 31A.

[0051] Here, the first curved edge region 21A and the second curved edge region 31A are substantially mirror-symmetrical with a space therebetween with respect to the virtual plane 60.

[0052] As shown in FIG. 1, since the first curved edge region 21A of the first clamping portion 20 and the second curved edge region 31A of the second clamping portion 30 are separated from each other, when attaching the retaining device 10 of the present invention to a cylinder or the like, the first curved edge region 21A and the second curved edge region 31A are pressed against the cylinder and then attached.

[0053] Since the first curved edge region 21A and the second curved edge region 31A are curved in the same manner as the surface of the cylinder, they are slippery on the surface of the cylinder, and the cylinder can smoothly enter the space surrounded by the first contact region 21 of the first clamping portion 20 and the second contact region 31 of the second clamping portion 30. As a result, it is easy to attach the retaining device 10 of the present invention to the cylinder.

[0054] Also, the retaining device 10 of the first embodiment of the present invention includes a stainless steel round bar 50. Here, the stainless steel round bar 50 extends linearly and has a predetermined length, for example, 25 to 30 cm. Also, the stainless steel round bar 50 can be detachably inserted into the first through hole 20A of the first clamping portion 20 and the second through hole 30A of the second clamping portion 30. The stainless steel round bar 50 is an example of the rod body. As long as the rod body is equivalent to the stainless steel round bar in terms of strength, durability, etc., the rod body can also be made of other metal round bars or resin round bars.

[0055] Also, the radial direction 30B of the second through-hole 30A is an oblique direction with respect to the virtual straight line 70 without a solid body connecting the first through-hole 20A and the second through-hole 30A, such that the radial direction 30B of the second through-hole 30A is substantially mirror-symmetrical to the radial direction 20B of the first through-hole 20A.

[0056] Here, the direction in which the straight line 70 connecting the first through-hole 20A and the second through-hole 30A extends is the same as the direction in which the stainless steel round bar 50 inserted into the first through-hole 20A and the second through-hole 30A extends. In the present invention, the "radial direction of the through-hole" means the diameter direction of each through-hole.

[0057] Also, the radial direction 20B of the first through-hole 20A is substantially mirror-symmetrical to the radial direction 30B of the second through-hole 30A, and is an oblique direction with respect to the straight line 70 connecting the first through-hole 20A and the second through-hole 30A.

[0058] Therefore, when no predetermined force is applied to the first clamping portion 20 and the second clamping portion 30, the edges of the first through-hole 20A and the second through-hole 30A can be pressed against the inserted stainless steel round bar 50 to fix the stainless steel round bar 50. Note that the diameter of the stainless steel round bar 50 is set to a length such that it contacts the edges of the first through-hole 20A and the second through-hole 30A when no predetermined force is applied to the first clamping portion 20 and the second clamping portion 30.

[0059] Also, when the retaining tool 10 of the present invention is attached to a cylinder having an outer diameter slightly larger than the straight-line distance connecting the mutually facing surfaces of the first contact region 21 and the second contact region 31, that is, the inner diameter, the first clamping portion 20 and the second clamping portion 30 are pushed apart, so that the edges of the first through-hole 20A and the second through-hole 30A can be further pressed against the stainless steel round bar 50. As a result, the stainless steel round bar 50 can be fixed more strongly.

[0060] Also, when inserting or removing the stainless steel round bar 50 into / from the first through-hole 20A and the second through-hole 30A, for example, pinch the first clamping portion 20 and the second clamping portion 30 with fingers and apply a predetermined force, and bring the first clamping portion 20 and the second clamping portion 30 closer to each other about the connection portion 40 as an axis, so that the angles of the radial direction 20B of the first through-hole 20A and the radial direction 30B of the second through-hole 30A with respect to the straight line 70 approach a right angle.

[0061] As a result, the edges of the first through-hole 20A and the second through-hole 30A are no longer pressed against the stainless steel round bar 50, and the stainless steel round bar 50 can be inserted into or removed from the first through-hole 20A and the second through-hole 30A.

[0062] Also, when removing the retaining tool 10 of the present invention from a cylinder or the like, hook two fingers on the stainless steel round bar 50 inserted into the first through-hole 20A and the second through-hole 30A, and apply a force to the retaining tool 10 of the present invention in a direction substantially orthogonal to the direction in which the cylinder extends and away from the cylinder.

[0063] In the retaining tool of the present invention, the first clamping portion does not necessarily have to have the first contact region and the first guiding region, and the second clamping portion does not necessarily have to have the second contact region and the second guiding region.

[0064] However, if the first clamping portion has the first contact region and the first guiding region, and the second clamping portion has the second contact region and the second guiding region, the first clamping portion and the second clamping portion can sufficiently contact a clamped object having a curved surface, for example, a support column. Furthermore, due to small movements of the first clamping portion and the second clamping portion respectively, the edge of the first through-hole or the edge of the second through-hole can be pressed against or removed from the stainless steel round bar, that is, the rod body, which is preferable.

[0065] Further, in the retaining device of the present invention, the first clamping portion and the second clamping portion do not necessarily have to be formed of a single stainless steel plate, i.e., a metal plate. For example, it is also possible to join a first clamping portion formed of a single stainless steel plate and a second clamping portion formed of a single stainless steel plate.

[0066] However, if the first clamping portion and the second clamping portion are formed of a single metal plate, when a predetermined force is applied to the first clamping portion and the second clamping portion, a reaction force that causes the first clamping portion and the second clamping portion to try to return to a certain position around their connection point like a leaf spring is likely to act, which is preferable.

[0067] Further, in the retaining device of the present invention, the edge of the first clamping portion on the side opposite to the connection point and the edge of the second clamping portion on the side opposite to the connection point do not necessarily have to be convexly curved toward the virtual plane.

[0068] However, if the edges of the first clamping portion and the edges of the second clamping portion are convexly curved toward the virtual plane, it is preferable because it becomes easier to attach the retaining device of the present invention to a clamped object having a curved surface, for example, a support column.

[0069] Next, the usage mode of the retaining device of the present invention will be described. FIG. 2 is a schematic view showing an example of the usage state of the retaining device to which the present invention is applied. That is, FIG. 2 shows a state in which the retaining device 10 of the present invention is attached to a glass fiber support column 80 used in columnar laver cultivation.

[0070] As shown in FIG. 2, the retaining device 10 of the present invention is attached near the upper end of the support column 80.

[0071] Also, at a position of the support column 80 below the retaining device 10 of the present invention in the vertical direction, one end of a suspension line 83 for suspending the laver net 82 is attached. Also, the other end of the suspension line 83 is attached to a rope 82A that constitutes the laver net 82.

[0072] Here, since the laver net 82 is suspended by the suspension rope 83, the position of the laver net 82 can move up and down by the length of the suspension rope 83.

[0073] Figure 2 shows a state where the laver net 82 rises from the sea surface at low tide and the laver 84 attached to the rope 82A is exposed to the air. As the sea level rises from low tide to high tide, after the laver net 82 touches the sea surface, the laver net 82 also rises with the rise of the sea level. In addition, the attachment position of the suspension rope 83 to the support column 80 is appropriately adjusted so that the laver net 82 is located on the sea surface at high tide.

[0074] If shellfish such as barnacles adhere to the surface of the support column 80, this position adjustment becomes difficult. Therefore, a barnacle adhesion prevention ring 81 for preventing the adhesion of shellfish such as barnacles is attached to the support column 80 so as to be movable up and down along the support column 80.

[0075] As shown in Figure 2, the retaining tool 10 of the present invention is arranged vertically above the barnacle adhesion prevention ring 81. Even if the barnacle adhesion prevention ring 81 that has moved upward due to the rise of the sea level tries to come off the support column 80, it hits the stainless steel round bar 50 provided in the retaining tool 10 of the present invention and cannot move upward any further, preventing the barnacle adhesion prevention ring 81 from coming off the support column 80.

[0076] Figure 3(a) is a schematic view showing a first clamping portion before inserting the stainless steel round bar of the retaining tool according to the second embodiment to which the present invention is applied, Figure 3(b) is a schematic view showing a second clamping portion before inserting the stainless steel round bar of the retaining tool according to the second embodiment to which the present invention is applied, and Figure 3(c) is a schematic plan view showing a state after inserting the stainless steel round bar of the retaining tool according to the second embodiment to which the present invention is applied.

[0077] The retaining tool 110 according to the second embodiment of the present invention shown in Figure 3 includes a first clamping portion 120 and a second clamping portion 130. Here, the second clamping portion 130 is connected to the first clamping portion 120 so as to be substantially mirror-symmetrical with a space therebetween with respect to the virtual plane 160.

[0078] Also, the first clamping portion 120 and the second clamping portion 130 are formed of a single stainless steel plate.

[0079] Also, the first clamping portion 120 has a first contact area 121. Here, the first contact area 121 is curved convexly in a direction opposite to the second clamping portion 130.

[0080] Also, the first clamping portion 120 has a substantially flat first guiding area 122. Here, the first guiding area 122 is located between the connection portion 140 of the first clamping portion 120 and the second clamping portion 130 and the first contact area 121.

[0081] Also, a plurality of through holes are formed between the connection portion 140 of the first clamping portion 120 and the second clamping portion 130 and the edge of the first clamping portion 120 on the side opposite to the connection portion 140, that is, in the first contact area 121 and the first guiding area 122.

[0082] Here, a first tip-side through hole 120A is formed at a location near the edge of the first clamping portion 120, that is, between the curved top and the edge of the first contact area 121. Also, a first base-side through hole 120B is formed at a location closer to the first guiding area 122 than the curved top of the first contact area 121. Furthermore, a first guiding area through hole 120C is formed in the first guiding area 122.

[0083] Also, the second clamping portion 130 has a second contact area 131. Here, the second contact area 131 is curved convexly in a direction opposite to the first clamping portion 120. Also, the first contact area 121 and the second contact area 131 have substantially the same curvature.

[0084] Further, the second clamping portion 130 has a substantially flat second key area 132. Here, the second key area 132 is located between the connection point 140 of the first clamping portion 120 and the second clamping portion 130 and the second contact area 131.

[0085] Also, a plurality of through holes are formed between the connection point 140 of the first clamping portion 120 and the second clamping portion 130 and the edge of the second clamping portion 130 on the side opposite to the connection point 140, that is, in the second contact area 131 and the second key area 132.

[0086] Here, a second tip-side through hole 130A is formed at a location near the edge of the second clamping portion 130, that is, at a location between the curved top and the edge of the second contact area 131. Also, a second base-side through hole 130B is formed at a location closer to the second key area 132 than the curved top of the second contact area 131. Furthermore, a second key area through hole 130C is formed in the second key area 132.

[0087] Also, the first tip-side through hole 120A and the second tip-side through hole 130A are formed at positions that are substantially mirror-symmetrical to each other with respect to the virtual plane 160. Also, the first base-side through hole 120B and the second base-side through hole 130B are formed at positions that are substantially mirror-symmetrical to each other with respect to the virtual plane 160. Furthermore, the first key area through hole 120C and the second key area through hole 130C are formed at positions that are substantially mirror-symmetrical to each other with respect to the virtual plane 160.

[0088] Also, a region within a predetermined range, for example, a region about 3 mm from the edge, of the edge of the first clamping portion 120 on the side opposite to the connection point 140 is curved convexly toward the virtual plane 160, forming a first curved edge region 121A. Further, a region within a predetermined range, for example, a region about 3 mm from the edge of the second clamping portion 130 on the side opposite to the connection portion 140, is curved convexly toward the virtual plane 160, forming a second curved edge region 131A.

[0089] Here, the first curved edge region 121A and the second curved edge region 131A are substantially mirror-symmetrical with a space therebetween with respect to the virtual plane 160.

[0090] Also, the retaining tool 110 according to the second embodiment of the present invention includes stainless steel round bars equal in number to the number of through holes, that is, a first stainless steel round bar 151, a second stainless steel round bar 152, and a third stainless steel round bar 153. Here, the first to third stainless steel round bars (151 to 153) extend linearly and have a predetermined length, for example, 25 to 30 cm.

[0091] Also, the first stainless steel round bar 151 can be detachably inserted into the first tip-side through hole 120A of the first clamping portion 120 and the second tip-side through hole 130A of the second clamping portion 130. Also, the second stainless steel round bar 152 can be detachably inserted into the first base-side through hole 120B of the first clamping portion 120 and the second base-side through hole 130B of the second clamping portion 130. Also, the third stainless steel round bar 153 can be detachably inserted into the first key-region through hole 120C of the first clamping portion 120 and the second key-region through hole 130C of the second clamping portion 130.

[0092] Also, although not shown, the radial directions of the first tip-side through hole 120A and the second tip-side through hole 130A are oblique with respect to an imaginary straight line without an entity connecting the first tip-side through hole 120A and the second tip-side through hole 130A.

[0093] Also, although not shown, the radial directions of the first proximal-side through hole 120B and the second proximal-side through hole 130B are oblique with respect to an imaginary straight line connecting the first proximal-side through hole 120B and the second proximal-side through hole 130B and having no entity.

[0094] Furthermore, although not shown, the radial directions of the first key area through hole 120C and the second key area through hole 130C are oblique with respect to an imaginary straight line connecting the first key area through hole 120C and the second key area through hole 130C and having no entity.

[0095] Here, the direction in which the straight line connecting the through holes extends is the same as the direction in which the round bar inserted into each through hole extends.

[0096] Therefore, when no predetermined force is applied to the first clamping portion 120 and the second clamping portion 130, the edge of the first distal-side through hole 120A and the edge of the second distal-side through hole 130A can be pressed against the inserted first stainless steel round bar 151 to fix the first stainless steel round bar 151.

[0097] Also, when no predetermined force is applied to the first clamping portion 120 and the second clamping portion 130, the edge of the first proximal-side through hole 120B and the edge of the second proximal-side through hole 130B can be pressed against the inserted second stainless steel round bar 152 to fix the second stainless steel round bar 152.

[0098] Furthermore, when no predetermined force is applied to the first clamping portion 120 and the second clamping portion 130, the edge of the first key area through hole 120C and the edge of the second key area through hole 130C can be pressed against the inserted third stainless steel round bar 153 to fix the third stainless steel round bar 153.

[0099] Note that the diameter of each of the first to third stainless steel round bars (151 to 153) is set to a length that contacts the edge of each through hole when no predetermined force is applied to the first clamping portion 120 and the second clamping portion 130.

[0100] Also, when inserting or removing the first stainless steel round bar 151 into / from the first tip-side through hole 120A and the second tip-side through hole 130A, for example, press the first curved edge region 121A of the first clamping portion 120 and the second curved edge region 131A of the second clamping portion 130 outward with fingers to apply a predetermined force, and move the first clamping portion 120 and the second clamping portion 130 away from each other with the connection point 140 as the axis, approaching the angle between the virtual straight line connecting the first tip-side through hole 120A and the second tip-side through hole 130A and the radial directions of the first tip-side through hole 120A and the second tip-side through hole 130A to a right angle.

[0101] As a result, the edges of the first tip-side through hole 120A and the second tip-side through hole 130A no longer press against the first stainless steel round bar 151, and the first stainless steel round bar 151 can be inserted into or removed from the first tip-side through hole 120A and the second tip-side through hole 130A.

[0102] On the other hand, when inserting or removing the second stainless steel round bar 152 and the third stainless steel round bar 153 into / from the respective through holes, for example, clamp the first clamping portion 120 and the second clamping portion 130 with fingers to apply a predetermined force, and move the first clamping portion 120 and the second clamping portion 130 closer to each other with the connection point 140 as the axis, approaching the angle between the virtual straight line connecting the first base-side through hole 120B and the second base-side through hole 130B and the radial directions of the first base-side through hole 120B and the second base-side through hole 130B to a right angle, or approaching the angle between the virtual straight line connecting the first key-region through hole 120C and the second key-region through hole 130C and the radial directions of the first key-region through hole 120C and the second key-region through hole 130C to a right angle.

[0103] As a result, the edges of the respective through holes no longer press against the second stainless steel round bar 152 and the third stainless steel round bar 153, and the second stainless steel round bar 152 and the third stainless steel round bar 153 can be inserted into or removed from the respective through holes.

[0104] The retaining tool 110 according to the second embodiment of the present invention can narrow the space surrounded by a plurality of rod bodies, that is, the first stainless steel round rod 151 and the second stainless steel round rod 152, between the first contact region 121 of the first clamping portion 120 and the second contact region 131 of the second clamping portion 130, and can quickly respond even when the diameter of the support column disposed in this space is small.

[0105] Moreover, even if one or two of the first to third stainless steel round rods (151 to 153) fall out from the through hole, the remaining round rods exhibit a retaining effect and it is easy to maintain the retaining effect.

[0106] FIG. 4(a) is a partial schematic view showing a first modification example of the first edge region and the second edge region of the retaining tool according to the first embodiment to which the present invention is applied, FIG. 4(b) is a partial schematic view showing a second modification example of the first edge region and the second edge region, and FIG. 4(c) is a partial schematic view showing a third modification example of the first edge region and the second edge region.

[0107] As shown in FIG. 4(a), a region within a predetermined range from the edge of the first clamping portion 20, for example, a region about 3 mm from the edge, is curved convexly toward the virtual plane 60, forming the first curved edge region 21B. Also, a region within a predetermined range from the edge of the second clamping portion 30, for example, a region about 3 mm from the edge, is curved convexly toward the virtual plane 60, forming the second curved edge region 31B.

[0108] On the other hand, unlike the edges of the first curved edge region 21A and the second curved edge region 31A shown in FIG. 1, the edges of the first curved edge region 21B and the second curved edge region 31B shown in FIG. 4(a), that is, the edges of the first clamping portion 20 and the second clamping portion 30, are located within the virtual circle 61.

[0109] Here, the first curved edge region 21B and the second curved edge region 31B are substantially mirror-symmetrical with a space therebetween with respect to the virtual plane 60.

[0110] In this specification, the virtual circle is a virtual circle without a physical entity that is inscribed in the concave curved surface of the first contact region of the first clamping portion and the concave curved surface of the second contact region of the second clamping portion. Further, the virtual circle 61 corresponds to the cross-sectional shape of the columnar support on which the retaining device of the present invention is mounted.

[0111] Also, as shown in FIG. 4(b), a region within a predetermined range from the edge of the first clamping portion 20, for example, a region about 3 mm from the edge, forms the first edge region 21C. Also, a region within a predetermined range from the edge of the second clamping portion 30, for example, a region about 3 mm, forms the second edge region 31C.

[0112] On the other hand, unlike the first curved edge region 21A and the second curved edge region 31A shown in FIG. 1, the first edge region 21C and the second edge region 31C shown in FIG. 4(b) are not curved convexly toward the virtual plane 60, but extend substantially linearly on the radial extension line of the virtual circle 61.

[0113] Here, the first edge region 21C and the second edge region 31C are substantially mirror-symmetrical with a space between them with respect to the virtual plane 60.

[0114] Also, as shown in FIG. 4(c), a region within a predetermined range from the edge of the first clamping portion 20, for example, a region about 3 mm from the edge, forms the first edge region 21D. Also, a region within a predetermined range from the edge of the second clamping portion 30, for example, a region about 3 mm, forms the second edge region 31D.

[0115] On the other hand, unlike the first curved edge region 21A and the second curved edge region 31A shown in FIG. 1, the first edge region 21D and the second edge region 31D shown in FIG. 4(c) are not curved convexly toward the virtual plane 60, and the edges of the first edge region 21D and the second edge region 31D, that is, the edges of the first clamping portion 20 and the second clamping portion 30, are located within the virtual circle 61.

[0116] Here, the first edge region 21D and the second edge region 31D are substantially mirror-symmetrical with a space therebetween with respect to the virtual plane 60.

[0117] In addition, as in the first modification shown in FIG. 4(a) or the third modification shown in FIG. 4(c), the retaining tool of the present invention in which the edges of the first clamping portion 20 and the edges of the second clamping portion 30 are located within the virtual circle 61 has an improved force for clamping the support column. This is because the edges of the first clamping portion 20 and the edges of the second clamping portion 30 are hooked on the surface of the support column, and by being hooked, the first clamping portion 20 and the second clamping portion 30 are pushed and moved in a direction opposite to the support column about the connection point between them. As a result, a reaction force, which is the force for the first clamping portion 20 and the second clamping portion 30 to return toward the support column, is generated.

[0118] FIG. 5(a) is a schematic cross-sectional view showing the state before inserting a stainless steel round bar of the retaining tool according to the third embodiment to which the present invention is applied, and FIG. 5(b) is a schematic view showing the state after inserting the stainless steel round bar of the retaining tool according to the third embodiment to which the present invention is applied.

[0119] The retaining tool 210 according to the third embodiment of the present invention shown in FIG. 5 includes a first clamping portion 220. In addition, the retaining tool 210 of the present invention includes a second clamping portion 230.

[0120] Here, different from the retaining tool 10 of the first embodiment of the present invention, the retaining tool 210 according to the third embodiment of the present invention is not connected to the first clamping portion 220 so that the second clamping portion 230 is substantially mirror-symmetrical with a space therebetween with respect to the virtual plane 260.

[0121] That is, as shown in FIG. 5, the second clamping portion 230 is spaced apart from the first clamping portion 220 and is connected to the first clamping portion 220. However, the length of the first clamping portion 220 is extremely shorter than the length of the second clamping portion 230, and it is not substantially mirror-symmetrical with respect to the virtual plane 260. Here, the second clamping portion 230 is connected to the first clamping portion 220 so that an object to be clamped, for example, a support column, can be clamped between the second clamping portion 230 and the first clamping portion 220.

[0122] Further, the first clamping portion 220 and the second clamping portion 230 are formed of a single stainless steel plate.

[0123] Further, the first clamping portion 220 has a first contact region 221. Here, the first contact region 221 is convexly curved in a direction opposite to the second clamping portion 230.

[0124] Further, the first clamping portion 220 has a first main region 222. Here, the first main region 222 is located between the connection portion 240 of the first clamping portion 220 and the second clamping portion 230 and the first contact region 221. Further, the first main region 222 is substantially flat and has a first through hole 220A formed therein.

[0125] Further, the second clamping portion 230 has a second contact region 231. Here, the second contact region 231 is convexly curved in a direction opposite to the first clamping portion 220.

[0126] Further, the first contact region 221 and the second contact region 231 have substantially the same curvature as each other, but the length of the first contact region 221 is extremely shorter than the length of the second contact region 231.

[0127] Further, since the first contact region 221 and the second contact region 231 have substantially the same curvature as each other, the surfaces of the first contact region 221 and the second contact region 231 facing each other are curved so as to be able to contact the circumference of a single common circle. In the space surrounded by the first contact region 221 of the first clamping portion 220 and the second contact region 231 of the second clamping portion 230, for example, a cylinder having an outer diameter of 4.5 cm can be arranged, but it is of course not limited thereto.

[0128] Further, the second clamping portion 230 has a second key area 232. Here, the second key area 232 is located between the connection point 240 of the first clamping portion 220 and the second clamping portion 230 and the second contact area 231.

[0129] Further, the second key area 232 is substantially flat plate-shaped, and a second through hole 230A is formed therein. Further, the second through hole 230A is formed at a position substantially mirror-symmetrical to the first through hole 220A of the first clamping portion 220 with respect to the virtual plane 260.

[0130] Also, a region within a predetermined range, for example, a region about 3 mm from the edge, from the edge of the first clamping portion 220 on the side opposite to the connection point 240 forms a first edge region 221A. Here, the first edge region 221A extends substantially linearly in a direction opposite to the space surrounded by the first contact area 221 of the first clamping portion 220 and the second contact area 231 of the second clamping portion 230.

[0131] Also, a region within a predetermined range, for example, a region about 3 mm from the edge, from the edge of the second clamping portion 230 on the side opposite to the connection point 240 forms a second edge region 231A. Here, the second edge region 231A extends substantially linearly in a direction opposite to the space surrounded by the first contact area 221 of the first clamping portion 220 and the second contact area 231 of the second clamping portion 230.

[0132] Also, the first edge region 221A extends substantially linearly while being inclined in a direction opposite to the second edge region 231A, and the second edge region 231A extends substantially linearly while being inclined in a direction opposite to the first edge region 221A.

[0133] As shown in FIG. 5, since the first edge region 221A of the first clamping portion 220 and the second edge region 231A of the second clamping portion 230 are separated from each other, when attaching the anti-loosening device 210 of the present invention to a cylinder or the like, the first edge region 221A and the second edge region 231A are attached while being pressed against the cylinder.

[0134] The first edge region 221A extends substantially linearly while being inclined in a direction opposite to that of the second edge region 231A. Also, since the second edge region 231A extends substantially linearly while being inclined in a direction opposite to that of the first edge region 221A, when the first edge region 221A and the second edge region 231A are pressed against a cylinder, the first edge region 221A and the second edge region 231A slide on the surface of the cylinder, and the cylinder can smoothly enter into the space surrounded by the first contact region 221 of the first clamping portion 220 and the second contact region 231 of the second clamping portion 230. As a result, the retaining member 210 of the present invention can be easily attached to the cylinder.

[0135] Also, similar to the retaining member 10 of the first embodiment of the present invention, in the retaining member 210 of the third embodiment of the present invention, the first edge region 221A and the second edge region 231A can also be configured to be curved. In this case, the first edge region 221A and the second edge region 231A can be configured to be convexly curved toward another virtual plane that is substantially orthogonal to the virtual plane 260.

[0136] Also, similar to the modification shown in FIG. 4(a) or FIG. 4(c), in the retaining member 210 of the third embodiment of the present invention, the edges of the first edge region 221A and the second edge region 231A, that is, the edges of the first clamping portion 220 and the second clamping portion 230 can also be configured to be located within a virtual circle.

[0137] The retaining member 210 of the third embodiment of the present invention includes a stainless steel round bar 250. Here, the stainless steel round bar 250 extends linearly and has a predetermined length, for example, 25 to 30 cm. Also, the stainless steel round bar 250 can be detachably inserted into the first through hole 220A of the first clamping portion 220 and the second through hole 230A of the second clamping portion 230. The stainless steel round bar 250 is an example of a rod body. As long as the rod body is equivalent to the stainless steel round bar in terms of strength, durability, etc., the rod body can also be another metal round bar or a resin round bar.

[0138] Also, the radial direction 230B of the second through-hole 230A is in an oblique direction with respect to the virtual straight line 270 without a physical entity connecting the first through-hole 220A and the second through-hole 230A, such that the radial direction 230B of the second through-hole 230A is substantially mirror-symmetrical to the radial direction 220B of the first through-hole 220A.

[0139] Here, the direction in which the straight line 270 connecting the first through-hole 220A and the second through-hole 230A extends is the same as the direction in which the stainless-steel round bar 250 inserted into the first through-hole 220A and the second through-hole 230A extends. Also, in the present invention, the "radial direction of the through-hole" means the diameter direction of each through-hole.

[0140] Also, the radial direction 220B of the first through-hole 220A is substantially mirror-symmetrical to the radial direction 230B of the second through-hole 230A and is in an oblique direction with respect to the straight line 270 connecting the first through-hole 220A and the second through-hole 230A.

[0141] Therefore, when no predetermined force is applied to the first clamping portion 220 and the second clamping portion 230, the edge of the first through-hole 220A and the edge of the second through-hole 230A can be pressed against the inserted stainless-steel round bar 250 to fix the stainless-steel round bar 250. Note that the diameter of the stainless-steel round bar 250 is set to a length such that it contacts the edge of the first through-hole 220A and the edge of the second through-hole 230A when no predetermined force is applied to the first clamping portion 220 and the second clamping portion 230.

[0142] Also, when the retaining tool 210 of the present invention is attached to a cylinder having an outer diameter slightly larger than the inner diameter, that is, the straight-line distance connecting the mutually facing surfaces of the first contact region 221 and the second contact region 231, the first clamping portion 220 and the second clamping portion 230 are pushed apart, so that the edge of the first through-hole 220A and the edge of the second through-hole 230A can be further pressed against the stainless-steel round bar 250. As a result, the stainless-steel round bar 250 can be fixed more strongly.

[0143] Also, when inserting the stainless steel round bar 250 into the first through-hole 220A and the second through-hole 230A or removing it from these through-holes, for example, pinch the first clamping portion 220 and the second clamping portion 230 with fingers and apply a predetermined force, and with the connection portion 240 as the axis, bring the first clamping portion 220 and the second clamping portion 230 closer to each other, and make the angles of the radial direction 220B of the first through-hole 220A and the radial direction 230B of the second through-hole 230A with respect to the straight line 270 approach a right angle.

[0144] As a result, the edges of the first through-hole 220A and the second through-hole 230A are no longer pressed against the stainless steel round bar 250, and the stainless steel round bar 250 can be inserted into or removed from the first through-hole 220A and the second through-hole 230A.

[0145] Also, when removing the retaining tool 210 of the present invention from a cylinder or the like, for example, press the second edge region 231A with fingers in a direction opposite to the first edge region 221A and apply a predetermined force, and with the second clamping portion 230 separated from the first clamping portion 220, apply a force to the retaining tool 210 of the present invention in a direction substantially perpendicular to the direction in which the cylinder extends and away from the cylinder.

[0146] Also, in the retaining tool of the present invention, the connection portion between the first clamping portion and the second clamping portion does not necessarily have to be curved, and for example, it can also have a flat shape.

[0147] FIG. 6(a) is a schematic view when the rod body of the retaining tool according to the fourth embodiment to which the present invention is applied is in the first state, and FIG. 6(b) is a schematic view when the rod body of the retaining tool according to the fourth embodiment to which the present invention is applied is in the second state.

[0148] The retaining tool 310 according to the fourth embodiment of the present invention shown in FIG. 6 includes a first clamping portion 320 and a second clamping portion 330.

[0149] Also, the first clamping portion 320 has a first contact region 321 and a first leading region 322. Further, the second clamping portion 330 has a second contact region 331 and a second key region 332.

[0150] Here, the first key region 322 is located between the connection point 340 of the first clamping portion 320 and the second clamping portion 330 and the first contact region 321. Also, the second key region 332 is located between the connection point 340 of the first clamping portion 320 and the second clamping portion 330 and the second contact region 331.

[0151] Also, the first key region 322 is substantially flat-plate shaped, and a first through hole 320A is formed therein. Also, the second key region 332 is substantially flat-plate shaped, and a second through hole 330A is formed therein. Also, the second through hole 330A is formed at a position substantially mirror-symmetrical to the first through hole 320A of the first clamping portion 320 with respect to the virtual plane 360.

[0152] Also, a region within a predetermined range, for example, a region about 3 mm from the edge, of the edge of the first clamping portion 320 on the side opposite to the connection point 340 forms a first edge region 321A. Here, the first edge region 321A extends substantially linearly in a direction opposite to the space surrounded by the first contact region 321 of the first clamping portion 320 and the second contact region 331 of the second clamping portion 330.

[0153] Also, a region within a predetermined range, for example, a region about 3 mm from the edge, of the edge of the second clamping portion 330 on the side opposite to the connection point 340 forms a second edge region 331A. Here, the second edge region 331A extends substantially linearly in a direction opposite to the space surrounded by the first contact region 321 of the first clamping portion 320 and the second contact region 331 of the second clamping portion 330.

[0154] Also, the first edge region 321A and the second edge region 331A are substantially mirror-symmetrical to each other with a space therebetween with respect to the virtual plane 360.

[0155] Further, the first edge region 321A is inclined in a direction opposite to the second edge region 331A and extends in a substantially straight line, and the second edge region 331A is inclined in a direction opposite to the first edge region 321A and extends in a substantially straight line.

[0156] Also, the first clamping portion 320 and the second clamping portion 330 included in the retaining tool 310 of the fourth embodiment of the present invention are the same as the first clamping portion 20 and the second clamping portion 30 included in the retaining tool 10 of the first embodiment of the present invention. Therefore, detailed descriptions of the first clamping portion 320 and the second clamping portion 330 are omitted.

[0157] Also, the retaining tool 310 of the fourth embodiment of the present invention includes a round bar 350 made of stainless steel. Here, a part of the bar body of the round bar 350 made of stainless steel, that is, a substantially central portion, is bent in one direction. This bent portion is the bent part 351.

[0158] That is, as shown in FIG. 6, the round bar 350 made of stainless steel has a bent part 351, and between one end of the round bar 350 made of stainless steel and the bent part 351 and between the other end on the side opposite to one end of the round bar 350 made of stainless steel and the bent part 351, they extend linearly at a predetermined angle to each other at the bent part 351. Here, the predetermined angle is, for example, 140 degrees to 160 degrees.

[0159] Also, the round bar 350 made of stainless steel has a grip portion 352. Here, the grip portion 352 is connected to one end of the round bar 350 made of stainless steel and extends in a direction substantially orthogonal to the direction in which the round bar 350 made of stainless steel extends linearly. That is, in the form shown in FIG. 6, a portion bent at approximately 90 degrees is taken as one end of the round bar 350 made of stainless steel.

[0160] Also, the length from one end to the other end of the round bar 350 made of stainless steel is, for example, 25 to 30 cm. In addition, the stainless-steel round bar 350 can be removably inserted into the first through-hole 320A of the first clamping portion 320 and the second through-hole 330A of the second clamping portion 330. Also, the stainless-steel round bar 350 is inserted into the first through-hole 320A and the second through-hole 330A such that the bent portion 351 of the stainless-steel round bar 350 is located in the space between the first key area 322 and the second key area 332.

[0161] In addition, the radial direction of the second through-hole 330A is oblique with respect to the virtual straight line 370 without a physical entity connecting the first through-hole 320A and the second through-hole 330A so that the radial direction of the second through-hole 330A is substantially mirror-symmetrical to the radial direction of the first through-hole 320A. Also, the radial direction of the first through-hole 320A is substantially mirror-symmetrical to the radial direction of the second through-hole 330A, and is oblique with respect to the straight line 370 connecting the first through-hole 320A and the second through-hole 330A.

[0162] Since the stainless-steel round bar 350 has a knob portion 352, the person attaching the retaining tool 310 of the present invention to the cylinder can grasp the knob portion 352 and rotate the stainless-steel round bar 350 as shown in Fig. 6(b) with the straight line 370 connecting the first through-hole 320A and the second through-hole 330A as the rotation central axis.

[0163] And, since the portions between one end of the stainless-steel round bar 350 and the bent portion 351 and between the other end opposite to one end of the stainless-steel round bar 350 and the bent portion 351 each extend linearly at the bent portion 351 so as to form an angle of, for example, 140 degrees to 160 degrees with each other, when the stainless-steel round bar 350 inserted into the first through-hole 320A and the second through-hole 330A is rotated, as shown in Fig. 6(b), the stainless-steel round bar 350 can be pressed against the edge of the first through-hole 320A and the edge of the second through-hole 330A so as to bring the first clamping portion 320 and the second clamping portion 330 closer to each other. As a result, the first clamping portion 320 and the second clamping portion 330 can be further pressed against the cylinder.

[0164] As described above, since the retaining tool of the present invention includes the first clamping portion and the second clamping portion, a support column used in columnar laver cultivation, that is, an object to be clamped, can be clamped between the first clamping portion and the second clamping portion.

[0165] Moreover, since the retaining tool of the present invention includes a stainless steel round bar, that is, a rod body, an anti-bivalve adhesion ring, that is, an object to be retained, can be applied to the rod body to restrict the movement of the object to be retained.

[0166] In addition, the radial direction of the first through hole and the radial direction of the second through hole are substantially mirror-symmetrical with respect to a virtual plane and are inclined with respect to the straight line connecting the first through hole and the second through hole. Therefore, when no predetermined force is applied to the first clamping portion and the second clamping portion, the edges of the first through hole and the second through hole can be pressed against the inserted rod body to fix the rod body.

[0167] Therefore, the retaining tool of the present invention is excellent in durability. As a result, the retaining tool of the present invention does not easily come off from a support column or the like, and the rod body also does not easily come off, so that the retaining effect can be maintained for a long time and it does not become garbage and have an adverse impact on the environment.

Explanation of Reference Numerals

[0168] 10 Retaining tool 20 First clamping portion 20A First through hole 20B Radial direction of the first through hole 21 First contact region 21A First curved edge region 21B First curved edge region 21C First edge region 21D First edge region 22 First main region 30 Second clamping portion 30A Second through hole 30B Radial direction of the second through hole 31 Second contact region 31A Second curved edge region 31B Second Curved Edge Region 31C Second Edge Region 31D Second Edge Region 32 Second Main Region 40 Connection Point 50 Stainless Steel Round Bar 60 Virtual Plane 61 Virtual Circle 70 Straight Line 80 Support Pillar 81 Anti-Fouling Ring for Shellfish 82 Seaweed Net 82A Rope 83 Suspension Rope 84 Seaweed 110 Retaining Device 120 First Clamping Portion 120A First Tip-Side Through Hole 120B First Base-Side Through Hole 120C First Main Region Through Hole 121 First Contact Region 121A First Curved Edge Region 122 First Main Region 130 Second Clamping Portion 130A Second Tip-Side Through Hole 130B Second Base-Side Through Hole 130C Second Main Region Through Hole 131 Second Contact Region 131A Second Curved Edge Region 132 Second Main Region 140 Connection Point 151 First Stainless Steel Round Bar 152 Second Stainless Steel Round Bar 153 Third Stainless Steel Round Bar 160 Virtual Plane 210 Retaining Device 220 First Clamping Portion 220A First Through Hole 220B Radial Direction of the First Through Hole 221 First Contact Region 221A First Edge Region 222 First Main Region 230 Second clamping part 230A Second through hole 230B Radial direction of the second through hole 231 Second contact area 231A Second edge area 232 Second key area 240 Connection point 250 Round bar made of stainless steel 260 Virtual plane 270 Straight line 310 Retaining device 320 First clamping part 320A First through hole 321 First contact area 321A First edge area 322 First key area 330 Second clamping part 330A Second through hole 331 Second contact area 331A Second edge area 332 Second key area 340 Connection point 350 Round bar made of stainless steel 351 Bending part 352 Knob part 360 Virtual plane 370 Straight line

Claims

1. a first clamping portion in which a first through hole is formed; connected to the first clamping portion so as to be substantially mirror-symmetrical with a space from the first clamping portion with respect to a predetermined virtual plane, and a second through hole is formed at a position substantially mirror-symmetrical with the first through hole of the first clamping portion with respect to the virtual plane, and the radial direction of the second through hole is an oblique direction with respect to a straight line connecting the first through hole and the second through hole so as to be substantially mirror-symmetrical with the radial direction of the first through hole; a second clamping portion; a rod body extending linearly and insertable into the first through hole of the first clamping portion and the second through hole of the second clamping portion and having a predetermined length a retaining device.

2. a first clamping portion in which a first through hole is formed; connected to the first clamping portion with a space from the first clamping portion so as to be able to clamp an object to be clamped between the first clamping portion and the first clamping portion, and a second through hole is formed at a position substantially mirror-symmetrical with the first through hole of the first clamping portion with respect to a predetermined virtual plane, and the radial direction of the second through hole is an oblique direction with respect to a straight line connecting the first through hole and the second through hole so as to be substantially mirror-symmetrical with the radial direction of the first through hole; a second clamping portion; a rod body extending linearly and insertable into the first through hole of the first clamping portion and the second through hole of the second clamping portion and having a predetermined length a retaining device.

3. a plurality of the first through holes are formed between a connection portion of the first clamping portion and the second clamping portion and an edge portion of the first clamping portion on the side opposite to the connection portion; a plurality of the second through holes are formed between a connection portion of the first clamping portion and the second clamping portion and an edge portion of the second clamping portion on the side opposite to the connection portion; each of the plurality of rod bodies is insertable into each of the plurality of first through holes and the second through holes The retaining device according to claim 1.

4. The first clamping portion has a first contact region curved convexly in a direction opposite to the second clamping portion, and a substantially flat first guiding region located between a connection portion of the first clamping portion and the second clamping portion and the first contact region and in which the first through hole is formed. The second clamping portion has a second contact region that is convexly curved in a direction opposite to that of the first clamping portion, and a substantially flat second main region that is located between the connection portion of the first clamping portion and the second clamping portion and the second contact region and in which the second through hole is formed. The retaining member according to claim 1, claim 2, or claim 3.

5. The first clamping portion and the second clamping portion are formed of a single metal plate. The retaining member according to claim 1, claim 2, claim 3, or claim 4.

6. A first edge region, which is a region within a predetermined range from the edge of the first clamping portion on the side opposite to the connection portion of the first clamping portion and the second clamping portion, and a second edge region, which is a region within a predetermined range from the edge of the second clamping portion on the side opposite to the connection portion of the first clamping portion and the second clamping portion, are each convexly curved toward the virtual plane. The retaining member according to claim 1.

7. The edges of the first clamping portion and the edges of the second clamping portion are each located within a virtual circle that is inscribed in the concave curved surface of the first clamping portion and the concave curved surface of the second clamping portion. The retaining member according to claim 6.

8. The rod has a bent portion, which is formed by bending a part of the rod in one direction, and between one end of the rod and the bent portion and between the other end of the rod, which is opposite to the one end, and the bent portion, they each extend linearly at a predetermined angle to each other at the bent portion. The rod has a grip portion, which is connected to one end of the rod and extends in a direction substantially perpendicular to the direction in which the rod extends linearly. The retaining member according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, or claim 7.

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