Main line holding device

Abstract

To provide a main rope holding device enabling a worker to pull in a main rope in an easy posture without leaning over the side of a ship when moving the ship in a cultured sea tangle facility.SOLUTION: To provide a main rope holding device used for performing work related to a training net of a kelp cultivation facility on the sea surface while moving a ship. The main rope holding device is arranged on the side of the ship, and has a rope holding part capable of holding a part of the main rope extending in the width direction of the ship in the sea on the sea surface, and a fixing part for fixing to the side of the ship. According to one embodiment, the rope holding portion has a rope placing portion on which the main rope is placed, and the rope placing portion is rotatable around the central axis in accordance with movement of the placed main rope. According to one embodiment, the line holding portion is changeable between a first position for holding the main line and a second position for releasing the main line.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to maintenance technology for kelp cultivation facilities, and more specifically, to a device that can hold the main rope at a predetermined height above sea level to reduce the workload of workers when performing tasks such as maintenance of the cultivation ropes used in kelp cultivation facilities. [Background technology]

[0002] The facility shown in Figure 1 is used for kelp cultivation. Note that in Figure 1, reference numbers are assigned to only some of the components to avoid cluttering the drawing. The kelp cultivation facility 1 in Figure 1 is composed of multiple main ropes 11 (ropes extending horizontally in Figure 1) each about 20 mm in diameter and multiple rearing ropes 12 (ropes extending vertically in Figure 1) each about 8 mm in diameter, tied together in a grid pattern. Generally, the spacing between adjacent main ropes 11 is about 4 to 5 m, and the spacing between adjacent rearing ropes 12 is about 2 m. The main ropes 11 and rearing ropes 12 are held on the surface of the ocean by floats 13, and both ends of each main rope 11 are fixed to the seabed by weights 14.

[0003] Kelp seedlings are attached to the cultivation ropes 12 in advance at a land-based seedling facility, and the cultivation ropes 12 are placed on the surface layer of the ocean to allow the kelp K to grow. The main ropes 11 and cultivation ropes 12 are tied together with some slack to prevent them from being damaged by the effects of tides, currents, and waves. For example, cultivation ropes 12 about 8 m long are placed at intervals of about 4 to 5 m.

[0004] During the underwater cultivation period, unwanted seaweed and shellfish such as mussels naturally attach to the cultivation rope 12. If these are left unattended, the amount of light necessary for the kelp K to grow will be insufficient, and they will compete with the kelp K for nutrients, hindering the growth of the kelp K, so work to remove the unwanted attachments is carried out from time to time. Furthermore, as the kelp K grows, it becomes overcrowded, so work to thin out the kelp K is carried out to maintain a population density appropriate for growth. In this specification, the work of removing attachments from the cultivation rope 12 and thinning out the kelp K as described above is referred to as maintenance.

[0005] Conventionally, maintenance of the support rope 12 is performed as follows. The work is performed by two workers on board the ship S, pointing the bow in the direction in which the support rope 12 extends as shown in Figure 1, and moving the ship S sideways in the sea in the direction in which the main rope 11 extends (the direction of the arrow shown in Figure 1 (the width direction of the ship S)). The two workers are divided into two positions, one at the bow and one at the stern of the ship S, and each uses a tool such as a hook to pull up the support rope 12 from the sea and take it inside the ship while it is parallel to the side of the ship. At this time, the support rope 12 is taken inside the ship while still connected to the main rope 11 in the water, taking advantage of the slack in the rope. After maintenance work such as removing fouling, thinning out the kelp K, attaching the support rope 12 to the main rope 11, and removing the support rope 12 from the main rope 11 is completed, the support rope 12 is returned to the sea as is. The ship S passes over the main line 11 and the returned support line 12 in the direction of the arrow in Figure 1, moves to the next support line 12, and similarly pulls up the support line 12 and performs the work. This process is repeated to perform maintenance on the support line 12.

[0006] It should be noted that currently, there are no commercially available devices for holding mainlines in place at sea, and no prior art documents to be mentioned in this specification. Summary of the Invention [Problem to be solved by the invention]

[0007] As shown in Figure 2(a), two workers lean over the gunwale at the front and rear of the ship S, simultaneously grasp the main rope 11 in the water, and simultaneously lift the main rope 11 above the water surface while pulling it in, thereby moving the ship S sideways. This moving work is very hard work.

[0008] Furthermore, when the helper rope 12 is pulled up from the sea and brought onto the ship S for work, the main rope 11 is simply secured to the ship S to prevent the ship S from moving unexpectedly due to currents or wind. For this purpose, in conventional work, the main rope 11 is secured by hooking it onto a fixture F1 (a fixture consisting of a short rope with a metal hook attached to the end) hanging from the side of the ship, as shown in FIG. 2(b), or onto a fixture F2 (a fixture consisting of a short wooden pole) erected on the side of the ship, as shown in FIG. 2(c). These fixtures must be installed at both the bow and stern. When work is completed and the ship S is to be moved laterally, the main rope 11 must be removed from these fixtures F1 and F2, and then re-secured to the fixtures F1 and F2 after the move. This removal and re-attachment process is time-consuming and cumbersome.

[0009] Furthermore, when the main rope 11 is secured at two points on one side of the ship, there is a high risk of the ship being hit by a beam wave in the event of a sudden large wave, strong wind, or change in the tide. If the tension on the main rope 11 becomes too great under these conditions, the ship will tilt, pulling the side of the ship into the sea, increasing the risk of flooding and, in the worst case, capsizing. It is not uncommon for sea conditions to deteriorate rapidly in a short period of time, especially during the winter, when kelp grows. When the main rope 11 becomes too taut, workers cannot remove it by themselves. If the tool shown in Figure 2(b) is used, the worker must cut the short rope connected to the hook with a blade and throw the hook into the sea to release the main rope 11. If the wooden post shown in Figure 2(c) is used, the worker must kick the wooden post with his foot to break it. Both methods are dangerous for the worker, and the metal hook and wooden post cannot be reused.

[0010] In view of the above problems, the present invention aims to provide a main rope holding device that allows an operator to pull in the main rope in a comfortable position without leaning over the side of the boat when moving the boat in a kelp cultivation facility. Another object of the present invention is to provide a mainline holding device that can easily secure and detach a mainline to a boat. It is yet another object of the present invention to provide a mainline holding device that can instantly release the mainline from the boat. [Means for solving the problem]

[0011] The present invention provides a main rope holding device used for carrying out work on the sea surface related to the cultivation nets of a kelp cultivation facility while the ship is moving. The main rope holding device is arranged on the side of the ship and has a rope holding part that can hold a part of the main rope extending in the width direction of the ship above the sea surface while underwater, and a fixing part that can be fixed to the side of the ship.

[0012] According to one embodiment, the rope holder has a rope placing portion for placing the main rope, the rope placing portion being rotatable about a central axis extending transversely to the length of the main rope as the placed main rope moves. According to another embodiment, the rope holder has a rope placing portion configured to allow the placed main rope to slide. According to yet another embodiment, the rope holder is configured to prevent the placed main rope from slipping, and is rotatable by power about a central axis extending transversely to the length of the main rope as the placed main rope moves. According to one embodiment, the rope holder has a main rope fixing portion for fixing the main rope.

[0013] According to one embodiment, the line holder is changeable between a first position for holding the main line and a second position for releasing the main line. In this case, the main line holder further has a position maintaining mechanism for maintaining the line holder in the first position. The main line holder further has a position releasing mechanism including a lever for releasing the line holder from the first position, and the lever is preferably located near the side of the boat.

[0014] According to one embodiment, the main rope holding device further includes a height adjustment mechanism that can change the height of the rope holding portion. According to another embodiment, the main rope holding device further includes a rope stopper that prevents the training rope connected to the main rope from getting entangled in the rope holding portion. [Effects of the Invention]

[0015] According to the present invention, the main rope is continuously held by the rope holder located at an appropriate height, allowing the worker to grasp the main rope in a comfortable position and to move the boat sideways simply by pulling on the main rope. Even if the worker lets go of the main rope midway, the rope holder keeps the main rope in a position where it can be reached immediately, allowing the boat to be moved sideways continuously. In addition, according to the present invention, when it is necessary to stop the movement of the ship and secure the main rope to the side of the ship, the main rope can be easily secured to the main rope securing portion, making it easy to secure and remove the main rope. Furthermore, sea conditions can change suddenly, especially during the winter when work is carried out. Even when working under such conditions, the ship and the main rope must be secured together in order to perform maintenance on the nurse rope. Therefore, when workers determine that there is a danger, they must immediately release the main rope from the ship. According to the present invention, the rope holding section can immediately release the main rope, allowing work to proceed safely. The configuration of the present invention reduces the labor required for lateral movement of the ship, simplifies the process of fastening and removing the main rope, and ensures safety in emergencies, making it possible for offshore work that previously required two people to be done by one person. [Brief explanation of the drawings]

[0016] [Figure 1] 1A and 1B are schematic diagrams of a kelp cultivation facility in which the main rope holding device according to the present invention can be used, where (a) is a plan view of the kelp cultivation facility and (b) is a side view of the kelp cultivation facility. [Figure 2] This is a schematic diagram showing a conventional method of main rope maintenance in a kelp farming facility. (a) shows a worker pulling up the main rope, (b) shows the main rope being secured to the side of the boat using a metal hook and rope after being pulled up, and (c) shows the main rope being secured to a wooden post installed on the side of the boat. [Figure 3] 1 is a perspective view of a main rope holding device according to one embodiment of the present invention; [Figure 4]Figures showing the state in which a main rope holding device according to one embodiment of the present invention is holding a main rope, where (a) is an oblique view of the state in which the main rope is hooked on the holding roller of the rope holding section, (b) is an oblique view of the state in which the main rope is clamped and fixed between the rope fixing hooks of the rope holding section, (c) is a view from the front of the fishing boat of the state in which the main rope holding device is holding the main rope, and (b) is a view from the side of the fishing boat of the state in which the main rope holding device is holding the main rope. [Figure 5] In a main rope holding device according to one embodiment of the present invention, (a) is a diagram explaining the locking mechanism, and (b) and (c) are diagrams showing the change in the rope holding portion from a position holding the main rope to a position releasing the main rope. [Figure 6] In a main rope holding device according to one embodiment of the present invention, (a) a rope deflector is attached to avoid the training rope attached to the main rope, and (b) the rope deflector prevents the training net from getting entangled. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will now be described in detail with reference to the drawings.

[0018] FIG. 3 is a perspective view of a main rope holding device 2 (hereinafter simply referred to as "device 2") according to one embodiment of the present invention. Figure 4 shows the state in which device 2 is holding the main rope 11 on the sea surface, where Figure 4(a) is an oblique view of the state in which the main rope 11 is placed on the holding roller 21 of the rope holding section 20, Figure 4(b) is an oblique view of the state in which the main rope 11 is clamped and fixed between the rope fixing hooks 24 of the rope holding section 20, Figure 4(c) is a view from the front of ship S of device 2 holding the main rope 11, and Figure 4(d) is a view from the side of ship S of device 2 holding the main rope 11. Figure 5(a) is a diagram explaining the change in posture of the rope holding portion 20, and Figures 5(b), (c) and (d) are diagrams showing the change in posture of the rope holding portion 20 from a posture (first posture) in which it holds the main rope 11 to a posture (second posture) in which it releases the main rope 11. Figure 6(a) shows the state in which a rope deflector 60 has been installed to avoid the training rope 12 attached to the main rope 11, and Figure 6(b) shows the state in which the rope deflector 60 prevents the training rope 12 from getting entangled in the rope holding part 20.

[0019] (Configuration of main rope holding device) The device 2 can be used in the kelp cultivation facility 1 for the purpose of performing work on the sea surface related to the cultivation lines 12 attached to the main lines 11. For example, the device 2 can be used to perform maintenance on the cultivation lines 12. Furthermore, in the kelp cultivation facility 1, work such as attaching the cultivation lines 12 to the main lines 11 and removing the cultivation lines 12 from the main lines 11 when harvesting kelp is also performed, and the device 2 can be used for these tasks as well. The device 2 is not limited to use for maintenance, attachment to the main lines 11, and removal from the main lines 11, but can also be used when performing some work related to the cultivation lines 12 while a portion of the main lines 11 is kept above the sea surface. In the following, an example will be described in which the device 2 is used for maintenance of the cultivation lines 12. Maintenance of the cultivation lines 12 can be performed on board the ship S while it is moved sideways, as shown in FIG. 1. The device 2 has a drum-shaped rope holding portion 20 that can hold the main rope 11 above the sea surface, a support frame 30 that supports the rope holding portion 20, and a ship edge fixing portion 40 for fixing the rope holding portion 20 and the support frame 30 to the ship edge of the ship S.

[0020] [Rope holding part] The rope holding unit 20 has a roughly cylindrical holding roller 21, which is a rope placing portion on which the main rope 11 can be placed. By placing the main rope 11 on the surface of the holding roller 21, the rope holding unit 20 can hold a portion of the main rope 11, which extends in the width direction of the ship underwater, above the sea surface. The holding roller 21 can be an empty roller that rotates around a central axis 20a. The holding roller 21 on which the main rope 11 is placed rotates in conjunction with the movement of the main rope 11 when the worker P pulls the main rope 11 to move the ship S. Therefore, the rope holding unit 20 is positioned so that the central axis 20a of rotation of the holding roller 21 extends in a direction transverse to the longitudinal direction of the main rope 11.

[0021] Flanges 22 are provided on both ends of the holding roller 21 to prevent the main rope 11 from slipping off the rope holding portion 20. As will be seen from Figure 5 described later, it is preferable that the inner flange 22a (the flange on the support frame 30 side) of the flange 22 is flat, and the outer flange 22b (the flange located farther from the support frame 30) is horn-shaped, with the surface continuing from the surface of the holding roller 21 sloping outward. The horn-shaped outer flange 22b allows the main rope 11 to easily slide off the rope holding portion 20 when the main rope 11 is released as shown in Figure 5. However, both flanges may be horn-shaped or flat.

[0022] In this embodiment, the rope holding portion 20 is configured as an empty roller that rotates around the central axis 20a, but is not limited to this. The holding roller 21 can also be configured so that the main rope 11 placed on it slides on its outer surface. For example, the holding roller 21 can be a non-rotating roller, and the outer surface can be formed from a material that has low friction with the main rope 11, or the outer surface can be covered with a material that has low friction with the main rope 11. The outer surface of the holding roller 21 or the material or materials that cover it can be made of, but are not limited to, a slippery resin, a metal such as stainless steel, or the like, as long as it can reduce friction with the main rope 11.

[0023] Alternatively, the rope holding portion 20 can be configured to prevent the main rope 11 placed on it from slipping. The rope holding portion 20 can be shaped to increase friction with the main rope 11, or the outer surface of the holding roller 21 can be formed from a material that has high friction with the main rope 11, or the outer surface can be covered with a material that has high friction with the main rope 11 and rotated by power such as a motor. With this configuration, the main rope 11 moves automatically due to friction with the rotating holding roller 21, and the ship S can move sideways accordingly. The shape of the rope holding portion 20 that can increase friction with the main rope 11 can also be, for example, a V-shape in which the distance between the two flanges 22 is narrowed so that the main rope 11 can be sandwiched between the flanges.

[0024] It is preferable that the rope holding portion 20 has a main rope fixing portion capable of fixing the main rope 11. For example, rope fixing hooks 24 with a spacing that allows the main rope 11 to be clamped can be provided on the inner surface of the inner flange 22a. When the ship S is moved laterally and stopped at a predetermined position to perform maintenance on the support rope 12, the main rope 11 can be fixed in the spacing of the rope fixing hooks 24 simply by dropping the main rope 11 from above the rope fixing hooks 24, thereby preventing the ship S from moving unintentionally due to wind or currents.

[0025] Two parallel locking plates 23 are fixed to the outer surface of the inner flange 22a. A holding portion support plate 311a, fixed to the support frame 30, is disposed between the two locking plates 23, with the inner surface of the locking plate 23 adjacent to the outer surface of the holding portion support plate 311a. Locking holes 23a are formed on the upper edges of the two locking plates 23 and are used to maintain the rope holding portion 20 in a first position, i.e., a position in which the rope holding portion 20 holds the main rope 11. The locking plates 23 with the locking holes 23a and the locking plate fixing plate 53 with the locking hole engaging portion 53a described below constitute a position maintaining mechanism that maintains the rope holding portion 20 in a position in which the rope holding portion 20 holds the main rope 11.

[0026] [Support Frame 30] The device 2 includes a support frame 30 for supporting the rope holding unit 20 so that it is positioned at a predetermined position on the sea. The support frame 30 has a vertical frame 31 that supports the rope holding unit 20 at a desired height between the sea surface and the side of the ship, and a horizontal frame 32 that supports the rope holding unit 20 on the side of the side of the ship. The horizontal frame 32 is preferably positioned above the vertical frame 31 so as to extend in a direction generally perpendicular to the vertical frame 31, but this is not limitative. For example, the horizontal frame 32 may be positioned above the vertical frame 31 so as to extend diagonally upward.

[0027] The vertical frame 31 has a lower frame 311 and an upper frame 312, and the upper frame 312 is formed in a cylindrical shape. The lower frame 311 is inserted into the upper frame 312, and the length of the vertical frame 31 can be adjusted by moving the lower frame 311 inside the upper frame 312. Because the tension of the main rope 11 changes depending on the tide level, wind, waves, etc., by configuring the vertical frame 31 to be adjustable in length, the rope holding part 20 can be positioned at an appropriate height to suit the physique of the worker P, etc. The lower frame 311 and the upper frame 312 are provided with length fixing holes 311d and 312d at corresponding locations, respectively, and their relative positions can be fixed by aligning the positions of these holes and inserting length fixing pins 313.

[0028] At the lower end of the lower frame 311, the rope holding portion 20 is attached so that its central axis 20a extends in a direction along the side of the ship S (the central axis 20a extends in a direction transverse to the longitudinal direction of the main rope 11 (see Figures 4(c) and 4(d)). At its lower end, the lower frame 311 has two parallel holding portion support plates 311a that are erected on the surface of the lower frame 311. The two holding portion support plates 311a are arranged at a distance from each other, and on the outer surface of each holding portion support plate 311a, the two locking plates 23 of the rope holding portion 20 are arranged in a positional relationship such that the outer surface of the holding portion support plate 311a is adjacent to the inner surface of the locking plate 23. The two locking plates 23 are rotatably connected to the two holding portion support plates 311a via a rotating shaft 311b that spans between the two locking plates at the lower end of the holding portion support plate 311a and at a position away from the inner flange 22a.

[0029] At the lower end of the lower frame 311, two restriction pins 311c for restricting the range of movement of the hold release part 50 are preferably provided between the two hold part support plates 311a.

[0030] A lateral frame 32 is attached to the upper frame 312 and extends laterally from it. The lateral frame 32 has a projection 321 that enables the rope holding unit 20 to be positioned on the side of the ship S, and two parallel ship's side fixing unit engagement plates 322 that are continuous with the projection 321. The two ship's side fixing unit engagement plates 322 are provided with a gap between them, and two parallel lateral frame engagement plates 42 of the ship's side fixing unit 40 are arranged outside each of the ship's side fixing unit engagement plates 322 in a positional relationship where the outer surfaces of the ship's side fixing unit engagement plates 322 and the inner surfaces of the lateral frame engagement plates 42 are adjacent to each other.

[0031] Two pins 322a, 322b are stretched between the two gunwale fixing portion engagement plates 322. Both ends of the pins 322a, 322b protrude from the outer surface of the gunwale fixing portion engagement plate 322. Of the two pins 322a, 322b, the protruding portion of the rear pin 322a, which is located farther from the rope holding portion 20, is inserted into the slit 42a in the transverse frame engagement plate 42 of the gunwale fixing portion 40, and the protruding portion of the front pin 322b, which is located closer to the rope holding portion 20, is inserted into the slit 42b in the transverse frame engagement plate 42.

[0032] The device 2 is designed to be easily detachable from the side of the ship S when mooring it or when transporting it to the kelp cultivation facility. The ship's side fixing portion engagement plate 322 and pins 322a, 322b are provided for this purpose. The device can be detached without using tools, and has, for example, a U-shaped locking component 43 to prevent accidental removal. A handle 323 for transporting the device 2 is preferably provided on the upper part of the horizontal frame 32.

[0033] [Fixed part] The device 2 has a ship's side fixing portion 40 so that the device 2 can be fixed to the ship's side of the ship S. The ship's side fixing portion 40 is attached to the end of the cross frame 32 and has a ship's side gripping portion 41 that clamps the ship's side, and a cross frame engaging plate 42 for attaching the ship's side fixing portion 40 to the cross frame 32.

[0034] The ship's side gripping part 41 is not limited to any particular configuration, as long as it can support the weight of the rope holding part 20 and the support frame 30, which protrude outward from the ship's side in a cantilevered manner. For example, the ship's side gripping part 41 can be configured to expand in width when force is applied to clamp the ship's side, and then grip the ship's side using spring force. Alternatively, it can be configured so that the width is adjusted to fit the ship's side and fixed with screws or the like.

[0035] Two parallel transverse frame engagement plates 42 are provided above the ship's side gripping portion 41. As described above, two ship's side fixing portion engagement plates 322 are arranged inside the two transverse frame engagement plates 42 such that the outer surfaces of the ship's side fixing portion engagement plates 322 and the inner surfaces of the transverse frame engagement plates 42 are adjacent to each other.

[0036] Each of the two horizontal frame engagement plates 42 has two slits 42a, 42b. Of the two slits 42a, 42b, the rear slit 42a, which is located farther from the rope holding part 20, is provided to extend laterally from the rear edge of the horizontal frame engagement plate 42, while the front slit 42b, which is located closer to the rope holding part 20, is provided in a generally L-shape pointing downward from the upper edge of the horizontal frame engagement plate 42. The protruding portions of the pins 322a, 322b described above are inserted into these slits 42a, 42b. The support frame 30 and the ship's side fixing part 40 are detachable from each other due to the above-mentioned configuration. The method of attachment and detachment will be described later.

[0037] [Retention release section] The device 2 is equipped with a holding release unit 50. If an operator determines that there is a danger, such as when the main rope 11 is being pulled strongly toward the water during maintenance of the kelp cultivation facility 1, the holding release unit 50 can be operated to quickly release the main rope 11 held by the rope holding unit 20 in order to ensure safety in an emergency. The holding release unit 50 has a lever 51 located at the upper end of the vertical frame 31 and a connecting rod 52 connected to the lever 51.

[0038] The lever 51 has an end rotatably fixed to a rotation support shaft 51a. The rotation support shaft 51a is pivotally supported on a support plate 54 fixed to the upper end of the vertical frame 31. Furthermore, the lever 51 is connected to a connecting rod 52 via a connecting rod connecting shaft 51b. Although not shown, the connecting rod 52 is preferably configured so that its length can be adjusted in accordance with the length adjustment of the support frame 30. When the lever 51 is lifted upward, the lever 51 rotates around the rotation support shaft 51a as a fulcrum, and as the connecting rod connecting shaft 51b moves upward, the connecting rod 52 is pulled upward (see FIG. 5). By fixing the lever 51 for operating the hold release unit 50 to the upper end of the vertical frame 31, the lever 51 can be located within easy reach of an operator P of the ship S, allowing the operator P to quickly operate the hold release unit 50 in an emergency.

[0039] A lock plate fixing plate 53 is attached to the lower end of the connecting rod 52. As shown in FIG. 5(a), the lock plate fixing plate 53 is generally T-shaped and has a lock hole engaging portion 53a on the lower side of the horizontal bar of the T. The lock plate fixing plate 53 with the lock hole engaging portion 53a constitutes a position maintaining mechanism that maintains the rope holding part 20 in a position that holds the main rope 11. When the rope holding part 20 is in a position that holds the main rope 11, the lock hole engaging portion 53a is inserted into the lock hole 23a provided on the upper side of the lock plate 23 of the rope holding part 20. When the connecting rod 52 is pulled upward, the lock hole engaging portion 53a disengages from the lock hole 23a, and the rope holding part 20 changes to a position that releases the main rope 11 (see FIGS. 5(c) and 5(d)). Therefore, the lever 51 for disengaging the lock hole engaging portion 53a from the lock hole 23a and the connecting rod 52 constitute a position releasing mechanism.

[0040] The lock plate fixing plate 53 further has two restriction pin holes 53b in the vertical bar portion of the T. Two restriction pins 311c provided at the lower end of the lower frame 311 of the support frame 30 are inserted into the restriction pin holes 53b, respectively, and the restriction pins 311c move up and down only within the range of the restriction pin holes 53b, thereby restricting the range of operation of the hold release part 50.

[0041] [Rope jumper] The device 2 preferably further includes a rope stopper 60. The rope stopper 60 can be two round rods installed to extend diagonally downward from the rope holding part 20 in the direction in which the boat S moves during maintenance of the cultivation ropes 12 in the kelp cultivation facility 1. The two round rods are attached so that they extend from the rope holding part 20 at an angle so that their tips come into contact at a position away from the rope holding part 20. The rope stopper 60 prevents the cultivation rope 12 connected to the main rope 11 from getting entangled in the rope holding part 20, and its installation allows for more continuous lateral movement of the boat S. Note that the rope stopper is not limited to the configuration of the rope stopper 60 shown here, as long as it allows the cultivation rope 12 connected to the main rope 11 to pass outside the rope holding part 20 without getting entangled.

[0042] (How to use the main rope holding device) Next, we will explain how to use the device 2. The device 2 is attached to a vessel S that performs maintenance on the kelp cultivation facility 1. When attaching the device 2 to the vessel S, first, the vessel's edge is clamped by the vessel's edge gripping portions 41 of the vessel's edge fixing portions 40 of the device 2. As shown in Figure 4(d), the device 2 is preferably attached near both the bow and the stern of the vessel S.

[0043] Next, the support frame 30 is attached to the gunwale fixing parts 40, which are fixed to the gunwale. When attaching the support frame 30 to the gunwale fixing parts 40, first, the transverse frame 32 is tilted, and the protruding parts at both ends of the pin 322a located at the rear of the gunwale fixing part engaging plate 322 are inserted into the slit 42a from the rear edge of the transverse frame engaging plate 42. The transverse frame 32 is moved forward, that is, in the direction away from the gunwale, and the protruding parts at both ends of the pin 322a are advanced toward the back of the slit 42a.

[0044] Then, while tilting the diagonal horizontal frame 32, the protruding portions at both ends of the pin 322b located in front of the gunwale fixing portion engagement plate 322 are inserted into the slit 42b from the upper edge of the horizontal frame engagement plate 42. When the horizontal frame 32 is horizontal, the horizontal frame 32 is further moved away from the gunwale, and the protruding portions of the pins 322a and 322b are advanced all the way into the slits 42a and 42b, respectively. Finally, the locking component 43 is tilted to hold down the horizontal frame engagement plate 42, preventing the horizontal frame 32 from coming off the gunwale fixing portion 40.

[0045] To remove the support frame 30 from the gunwale fixing parts 40, simply reverse the above steps. First, lift the locking parts 43 upward to remove them, then move the transverse frame 32 toward the gunwale. Then, lift the transverse frame 32 diagonally rearward to remove the protruding part of the pin 322b upward from the slit 42b. Then, move the transverse frame 32 toward the gunwale to remove the protruding part of the pin 322a rearward from the slit 42a. Next, remove the gunwale fixing parts 40 from the gunwale.

[0046] After attaching the support frame 30 to the ship's side fixing part 40, the height of the rope holding part 20 is adjusted. The height adjustment is performed by adjusting the length of the vertical frame 31 of the support frame 30. The length of the vertical frame 31 can be adjusted by moving the lower frame 311 up and down inside the cylindrical upper frame 312 and inserting the length fixing pins 313 into the length fixing holes 311d, 312d at the appropriate positions.

[0047] The main rope 11 is placed on the rope holding section 20, the height of which has been appropriately adjusted. More specifically, a worker P uses a tool such as a hook to pull up the main rope 11 from the sea at the point where the support rope 12 is connected, and places the pulled-up main rope 11 (a part of the main rope 11) on the holding rollers 21 of the rope holding section 20, as shown in Figure 4(a). This work is preferably performed simultaneously by workers P near the bow and stern of the ship S. Because the support rope 12 is connected to the pulled-up main rope 11, the worker P can lift the support rope 12 onto the ship and perform maintenance such as removing any attached matter and thinning out the kelp K. The worker P can also perform maintenance such as attaching a new support rope 12 to the part of the pulled-up main rope 11 or removing the support rope 12 from the pulled-up main rope 11.

[0048] The height of the rope holding part 20 is adjusted to a height that allows the worker P to easily grasp the main rope 11 that has been raised from the sea. Therefore, the rope holding part 20, whose height has been adjusted appropriately, continues to hold the main rope 11 that has been raised from the sea, allowing the worker P to grasp the main rope 11 in a comfortable position and to move the ship S laterally simply by reeling in the main rope 11. Even if the worker P lets go of the main rope 11 during the work, the main rope 11 continues to be held in a position that is easily reachable, allowing the ship S to be moved laterally continuously. In contrast, the conventional method requires the worker P to constantly lift the main rope 11 from the sea and pull it in, which means that the worker P has to work while bending his waist significantly and looking downward, which places a great strain on him.

[0049] If worker P determines that there is a danger during work, for example, because the main rope 11 is being pulled too strongly toward the sea, he or she will pull the lever 51 of the retention release part 50 in the direction shown by the arrow in Figure 5(b). When worker P pulls the lever 51, it rotates around the rotation support shaft 51a, causing the connecting rod connecting shaft 51b to move upward, and the connecting rod 52 connected to the connecting rod connecting shaft 51b to move upward.

[0050] When the connecting rod 52 moves upward, the lock plate fixing plate 53 provided at its lower end also moves upward. As shown in Fig. 5(a), the lock plate fixing plate 53 has a lock hole engaging portion 53a, which is inserted into the lock hole 23a provided in each of the two lock plates 23 of the rope holding part 20, so that the rope holding part 20 is maintained in a position (first position) in which it holds the main rope 11, as shown in Fig. 5(c). When the lock plate fixing plate 53 moves upward from the position in which the rope holding part 20 holds the main rope 11, the lock hole engaging portion 53a disengages from the lock hole 23a. As a result, the rope holding portion 20, which is rotatably connected to the holding portion support plate 311a only by the rotating shaft 311b at the lower end of the holding portion support plate 311a and at a position away from the inner flange 22a, falls in the opposite direction to the support frame 30 with the rotating shaft 311b as a fulcrum, and changes to a position (second position) that releases the main rope 11 (see Figures 5(c) and 5(d)).

[0051] When the rope holding part 20 assumes the position shown in Figure 5(d) to release the main rope 11, the held main rope 11 separates from the holding roller 21 and falls into the sea. At this time, if the outer flange 22b is formed in a trumpet shape, the main rope 11 slides down the inclined surface on the inner surface of the flange 22, making it easier to release the main rope 11 from the rope holding part 20. Furthermore, even if the main rope 11 is fixed to the rope fixing hook 24, the rope holding part 20 will fall in a direction that makes it easy for the main rope 11 to come off the rope fixing hook 24, making it easy to remove the main rope 11 from the rope fixing hook 24. [Explanation of symbols]

[0052] 1. Kelp farming facility 11 Main rope 12 Training rope 13 floating ball 14 weights 2 Trunk line holding device 20 Rope holding part 20a center axis 21 Retaining roller 22 flange 22a Inner flange 22b Outer flange 23 Locking Plate 23a Lock hole 24 Rope fixing hook 30 Support Frame 31 Vertical Frame 311 Lower Frame 311a Holding part support plate 311b Rotating shaft 311c Regulator pin 311d Length fixing hole 312 Upper Frame 312d Length fixing hole 313 Length fixing pin 32 Horizontal Frame 321 Overhang 322 Ship edge fixing part engagement plate 322a, 322b pins 323 Handle 40 Edge fixing part 41 Edge grip 42 Horizontal frame engagement plate 42a, 42b slits 43 Lock parts 50 Holding release section 51 Lever 51a Rotation support shaft 51b Connecting rod connecting shaft 52 Connecting rod 53 Lock plate fixing plate 53a Lock hole engagement portion 53b Regulating pin hole 54 Support plate 60 Rope Jumper 61, 62 Round bar F1 Fixture (rope + metal hook) F2 Fixture (Wooden Post) P Operator K kelp S ship

Claims

1. A main rope holding device used to carry out work on the cultivation nets of kelp cultivation facilities on the sea surface while moving a ship, a rope holding section disposed on the side of the ship and capable of holding a portion of the main rope extending in the width direction of the ship above the sea surface; A fixing part for fixing to the side of the ship having Trunk line holding device.

2. The rope holding portion has a rope placing portion on which the main rope is placed, and the rope placing portion is rotatable around a central axis extending in a direction transverse to the length direction of the main rope in accordance with the movement of the placed main rope. The main rope holding device according to claim 1.

3. The rope holding portion has a rope placing portion configured so that the placed main rope slides. The main rope holding device according to claim 1.

4. The rope holding portion is configured to prevent the main rope placed thereon from slipping, and is rotatable by power around a central axis extending in a direction transverse to the length of the main rope as the placed main rope moves. The main rope holding device according to claim 1.

5. The rope holding portion has a main rope fixing portion for fixing the main rope. The main rope holding device according to claim 1.

6. The rope holding portion is changeable between a first position for holding the main rope and a second position for releasing the main rope. The main rope holding device according to claim 1.

7. Further comprising a position maintaining mechanism that maintains the rope holding portion in the first position. The main rope holding device according to claim 6.

8. a position release mechanism including a lever for releasing the line holder from the first position, the lever being positioned near the side of the boat; The main rope holding device according to claim 7.

9. Further, a height adjustment mechanism is provided that can change the height of the rope holding portion. The main rope holding device according to claim 1.

10. Further provided is a rope stopper for preventing the training rope connected to the main rope from being entangled in the rope holding portion. The main rope holding device according to claim 1.

Images