Ship Mooring Equipment

Abstract

To provide a ship mooring facility capable of suppressing damage caused by flooding of rivers and drainage channels flowing into the rivers, and flooding of river basins, while also significantly suppressing the need to increase the size of drainage facilities and the labor and costs required for daily maintenance and management. [Solution] A ship mooring facility 16 is formed comprising a tugboat 17 floated on a river 10 with its bow 24 facing upstream of the river 10 and having a screw 22 that generates propulsion, a towing line 18 connected to the tugboat 17, and a pile 20 connected to the towing line 18 and fixed to the riverbed 19, the pile 20 having an arrangement space E1 that keeps the towing line 18 connected, and the arrangement space E1 being closed on the upstream side of the river 10 and open on the downstream side of the river 10.

Description

[Technical field]

[0001] The present disclosure relates to a ship mooring facility for flood control in rivers and drainage channels flowing into the rivers. [Background technology]

[0002] An example of a water flow speed-increasing device for flood prevention measures against river overflow and flooding is described in Patent Document 1. The water flow speed-increasing device described in Patent Document 1 is used in a fixed state near the mouth of a river. This water flow speed-increasing device is equipped with a water flow acceleration unit with a screw attached to a motor shaft in a cylinder arranged and fixed in water parallel to the water flow, and the accelerated downstream water flow is generated in the cylinder with the operation of the water flow acceleration unit. When the water flow speed-increasing device described in Patent Document 1 is operated, the screw is rotated by the motor to forcibly generate an accelerated water flow from the cylinder toward the downstream side, thereby increasing the flow speed near the mouth of the river and promoting the flow into the sea. It is said that the water flow speed-increasing device described in Patent Document 1 can suppress abnormal flooding of the river and prevent the river from flooding. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-184784 A Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors of the present application recognized that the water flow speed increasing device described in Patent Document 1 has the problem that the fixed equipment is large in size and requires a great deal of effort and expense for daily maintenance and management.

[0005] The object of the present disclosure is to provide a ship mooring facility that can reduce damage caused by the flooding of rivers and the drainage channels flowing into them, and flooding in river basins, while also significantly reducing the need to increase the size of the drainage equipment and the labor and costs required for daily maintenance and management. [Means for solving the problem]

[0006] This embodiment discloses a ship mooring facility comprising a ship (mainly a tugboat) floated on a river, with the bow facing upstream of the river and having a screw that generates powerful propulsive force toward the sea, a towing line connected to the ship, and a mooring device connected to the towing line and fixed at the place of use, the mooring device having an arrangement space that keeps the towing line connected, the arrangement space being closed on the upstream side of the river and open on the downstream side of the river. Effect of the Invention

[0007] According to this embodiment, it is possible to reduce damage caused by flooding of rivers and drainage channels flowing into them, and flooding in the river basin, while also significantly reducing the size of the drainage equipment itself and the labor and costs required for daily maintenance and management. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1A is a schematic plan view showing a river and the sea equipped with ship mooring facilities, and FIG. 1B is a side cross-sectional view of the river equipped with ship mooring facilities. [Diagram 2] FIG. 2 is an enlarged cross-sectional view showing an example of a mooring device of a ship mooring facility. [Diagram 3] 3(A) is an enlarged cross-sectional side view of another example of a mooring device, and FIG. 3(B) is a plan view of the mooring device of FIG. 3(A) seen from above. [Figure 4] FIG. 11 is a side cross-sectional view showing another example of a ship mooring equipment. [Diagram 5] FIG. 1A is a schematic plan view seen from above showing an example in which there is a single towing rope and mooring device, and FIG. 1B is a schematic plan view seen from above showing an example in which there are multiple towing ropes and mooring devices. [Figure 6] FIG. 11 is a plan view showing another example of a ship mooring equipment. [Figure 7] FIG. 11 is a side cross-sectional view showing another example of a mooring device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (Overview of ship mooring facilities) The embodiment of the ship mooring equipment is provided to suppress the rise in the water level of the river, thereby suppressing flooding of the river and the drainage channels flowing into the river, and flooding of the river basin. The screw of a ship (mainly a tugboat) equipped with the ship mooring equipment is rotated powerfully, promoting the flow of water from the river toward the sea. The embodiment of the ship mooring equipment is described with reference to the drawings. In each drawing, the same components are given the same symbols.

[0010] (Examples of ship mooring equipment) 1(A) and (B), a river 10 flows into the sea 11, and water flows in a direction A1 from the upstream to the downstream of the river 10. The river 10 exists on land 12, and on either side of the river 10, going downstream, there are a right bank 13 and a left bank 14. A ship mooring facility 16 is located at a river mouth 15 where the water of the river 10 flows into the sea 11.

[0011] The ship mooring facility 16 is provided for the purpose of suppressing a rise in the water level of the river 10, thereby suppressing flooding of the river 10 and the drainage channels flowing into the river 10, and damage caused by flooding in the river basin. The ship mooring facility 16 has a tugboat 17, which is an example of a work boat among ships, a towing rope 18 connected to the tugboat 17, and piles 20 as mooring devices provided on the riverbed 19 of the river 10. The tugboat 17 travels across and anchors in the river 10 while floating on the river. The tugboat 17 has a hull 21, a screw 22 provided on the hull 21, a drive source (engine) 23 that rotates the screw 22, a drive source control device (not shown), and a steering device (not shown).

[0012] The hull 21 has a bow 24 and a stern 25, and the drive source 23 is provided at a position approximately in the center in the propulsion direction (movement direction) B1 of the hull 21. The screw 22 is provided at the rear in the propulsion direction B1 of the hull 21. Furthermore, a power transmission mechanism 40, such as a rotating shaft, that connects the drive source 23 and the screw 22 is provided inside the hull 21.

[0013] Furthermore, a hull-side fastening device 26 is provided at a predetermined position in the propulsion direction B1 of the hull 21, for example, on the upper surface of the stern 25. The hull-side fastening device 26 is formed, for example, of a hook, a bracket, etc. FIG. 1(B) is a side cross-sectional view of the river 10 when viewed from the right bank 13 to the left bank 14. The towing rope 18 is formed, for example, of a fiber rope. A first end portion in the longitudinal direction of the towing rope 18 is connected to the hull-side fastening device 26. The towing rope 18 can be attached to and detached from the hull-side fastening device 26.

[0014] 2 is a partially enlarged view of FIG. 1(B), and the pile 20 has an axially shaped main body 27 and an engaging portion 28 connected to the upper end of the main body 27 as shown in FIG. 2. The main body 27 is embedded in the riverbed 19, and the engaging portion 28 is connected to a portion of the main body 27 exposed from the riverbed 19. When the pile 20 is viewed from the side, the engaging portion 28 extends downstream from the upper end of the main body 27 in the flow direction A1. When the pile 20 is viewed from the side, the side shape of the pile 20 appears in a plane that is parallel to and perpendicular to the flow direction A1 of the river 10. In the flow direction A1, the engaging portion 28 is located downstream of the main body 27.

[0015] The portion where the main body portion 27 and the locking portion 28 are connected constitutes the curved portion 29. When the pile 20 is viewed from the side, the curved portion 29 is located above the main body portion 27 and the locking portion 28 in the direction along the imaginary line C3. When the pile 20 is viewed from the side, the curved portion 29 is preferably in a smooth curved shape or an arc shape. This is because, in the unlikely event that a ship passes above the pile 20 and comes into contact with the curved portion 29 or the locking portion 28, damage to the ship can be minimized. The curved portion 29 is located above the main body portion 27 and the locking portion 28 in the vertical direction. The imaginary line C3 is a straight line indicating the vertical direction, that is, the direction in which gravity acts.

[0016] The angle α1 between the imaginary line C1 indicating the center of the main body 27 and the horizontal imaginary line C2 is, for example, 30 degrees≦α1≦90 degrees The angle α1 is set within the range of 90 degrees. Angle α1 of 90 degrees means that the main body 27 is embedded in the riverbed 19 so that the virtual line C1 coincides with the virtual line C3. An angle α1 of less than 90 degrees means that the anchoring portion 28 is maintained in a state of being located downstream of the main body 27, and the virtual line C1 is inclined with respect to the virtual line C2. The pile 20 shown in FIG. 2 is an example in which angle α1 is less than 90 degrees. The reason for considering such an angle is that a strong pulling force acts on the tugboat 17 trying to move upstream, and the main body 27 of the pile 20 can effectively resist the force.

[0017] Furthermore, an arrangement space E1 is provided between the curved portion 29 and the riverbed 19. The arrangement space E1 is open on the downstream side and closed on the upstream side in the flow direction A1 of the river 10. That is, there is a gap between the tip of the locking portion 28 and the riverbed 19. The second end of the towing rope 18 has a ring 18A, and when the towing rope 18 is moved and the curved portion 29 is inserted into the ring 18A, the towing rope 18 can be connected (engaged) to the pile 20. When the towing rope 18 is connected to the pile 20, most of the towing rope 18 is disposed in the water. When the towing rope 18 is moved and the locking portion 28 is pulled out from the ring 18A, the towing rope 18 can be removed from the pile 20.

[0018] The drive source control device (not shown) is provided, for example, in the cockpit of the hull 21. A crew member of the tugboat 17 operates the drive source control device to control the stopping and rotation of the drive source, the rotation speed of the drive source, etc. A steering device (not shown) is provided, for example, in the cockpit of the hull 21. A crew member of the tugboat 17 operates the drive source control device to control the rotation and stopping of the drive source 23, and the rotation speed of the drive source 23.

[0019] (Examples and Effects of Ship Mooring Equipment) An example of how the ship mooring equipment 16 is used is as follows. With the bow 24 of the tugboat 17 facing upstream (upriver) of the river 10, the drive source 23 and the screw 22 are rotated. Then, a strong propulsive force is generated in the tugboat 17 toward the upstream of the river 10. The propulsive direction B1 is opposite to the water flow direction A1 in the river 10.

[0020] When the towing rope 18 is engaged with the pile 20 and is in a taut state, the tugboat 17 stays in a fixed position and does not move forward. Therefore, the flow rate of water in the flow direction A1 of the river 10 is originally a natural flow rate due to the difference in elevation of the riverbed 19, but a large flow rate corresponding to the strong propulsion force of the screw 22 is added to this. In other words, the water flow in the flow direction A1 of the river 10 is promoted, and the amount of drainage from the river 10 to the sea 11 increases. Therefore, it is possible to suppress the rise in water level upstream of the river mouth 15, and it is possible to avoid or reduce damage such as flooding of the river upstream of the river mouth 15 and the drainage channels flowing into it, and flooding of the river basin.

[0021] In addition, the pile 20 has a body 27 inclined toward the downstream. In other words, the angle α1 is 30 degrees≦α1≦90 degrees When the load is designed to be within this range, the engagement force between the main body 27 and the riverbed 19 is increased. Therefore, the pile 20 can be prevented from coming out of the riverbed 19 due to the pulling force of the towing rope 18.

[0022] Furthermore, when the screw 22 is rotated with the bow 24 of the tugboat 17 facing downstream, i.e., toward the sea 11, the tugboat 17 is navigated downstream, i.e., toward the sea 11, the ring 18A passes through the arrangement space E1, and the towing rope 18 is removed from the pile 20. Therefore, the tugboat 17 can navigate the river 10 or the sea 11 as desired. In this way, in peacetime when there is no need to adjust the water level of the river 10, the tugboat 17 can navigate from the river mouth 15 to another location and engage in normal business of towing ships, minimizing the equipment fixed to the river mouth 15 and suppressing the increase in size of the equipment. In addition, there is no hindrance to the passage of other ships in peacetime.

[0023] Moreover, the curved portion 29 is located above the main body portion 27 and the locking portion 28 in the vertical direction. The curved portion 29 has a smoothly curved shape and an arc shape along the flow direction A1 of the river 10 and within a vertical plane. Therefore, even if the bottom 21A of the hull 21 of the tugboat 17 comes into contact with the pile 20, damage to the bottom 21A can be suppressed. Even if a ship other than the tugboat 17 navigates the river 10 and the bottom of the ship comes into contact with the pile 20, damage to the bottom of the ship can be suppressed by smooth friction.

[0024] Furthermore, conventional facilities, such as the water flow speed-increasing device described in the aforementioned Patent Document 1 (JP Patent Publication No. 2003-184784), had many problems, including difficult economic and technical issues in that a special unit that could not be used for other purposes had to be developed and manufactured just for that purpose, difficult everyday issues in that the unit had to be regularly maintained, repaired, and managed, and convenience issues in that the unit interfered with traffic on the river during peacetime when there was no flooding.

[0025] In response to these issues, the ship mooring equipment 16 of this embodiment has the objective of providing a ship mooring equipment that does not require the construction of large rainwater storage facilities like huge underground temples in urban areas, prevents the drainage equipment from becoming too large, minimizes the technical and economic burden of maintenance, and does not impede river traffic in peacetime.

[0026] Furthermore, the ship mooring equipment 16 of this embodiment has the effect of minimizing or eliminating the need for construction work to raise the bank level, creating huge underground temple-like storage spaces in the midstream of the river, and constructing water storage facilities and drainage pumping stations in riverbeds and fields, and also making it possible to prevent the drainage equipment itself from becoming larger.

[0027] (Other examples of mooring devices) Another example of a mooring device is shown in Figures 3(A) and (B). The mooring device 30 has a main body 27, a locking portion 28, a curved portion 29, a plate 31, and a nail 32. The plate 31 is made of metal, and is placed on the upper surface of the riverbed 19 and arranged along the imaginary line C2. The main body 27 protrudes from the upper surface of the plate 31. The locking portion 28 is provided on the upper end of the main body 27 via the curved portion 29. The nail 32 is driven into the riverbed 19 and buried therein. The plate 31 is fixed to the riverbed 19 by a plurality of nails 32. The nail 32 is axially shaped, and is arranged upstream and downstream of the main body 27. The nail 32 is driven into the riverbed 19.

[0028] The number of nails 32 may be any of two, three, four or more. FIG. 3(B) shows an example in which there are four nails 32. An arrangement space E1 is formed between the tip of the engaging portion 28 and the river bottom 19, specifically between the tip of the engaging portion 28 and the upper surface of the plate 31. When the mooring device 30 is viewed from the side, an imaginary line C4 passing through the center of the nail 32 is inclined with respect to the imaginary line C3. The angle α2 between the imaginary line C3 and the imaginary line C2 is, for example, 30 degrees≦α2≦90 degrees is set within the range.

[0029] Angle α2 of 90 degrees means that the nail 32 is driven into the riverbed 19 so that the virtual line C4 coincides with the virtual line C3. An angle α2 of less than 90 degrees means that the virtual line C4 is inclined with respect to the virtual line C2 so that the head of the nail 32 is located downstream of the tip of the nail 32. The pile 20 shown in FIG. 3(A) is an example where angle α2 is less than 90 degrees. Also, when the mooring device 30 is viewed from the side, an example is shown in which the virtual line C3 and the virtual line C1 are parallel to each other.

[0030] The mooring device 30 shown in Fig. 3(A) and (B) can be used in place of the pile 20 shown in Fig. 1(B). The mooring device 30 can obtain the same effect as the pile 20 with respect to the same components as those of the pile 20. The mooring device 30 is fixed to the river bottom 19 by the engagement force between the nails 32 and the river bottom 19. When the towing line 18 is connected to the mooring device 30, most of the towing line 18 is underwater. Even if the screw 22 is rotated to generate propulsive force in the tugboat 17 while the bow 24 of the tugboat 17 is facing upstream and the towing line 18 is engaged with the mooring device 30, the tugboat 17 stops at the anchorage and does not propel. Therefore, the rise in water level upstream of the river mouth 15 can be suppressed, and damage such as flooding of the river upstream of the river mouth 15 and the drainage channels flowing into the river mouth, and flooding of the river basin can be avoided or reduced.

[0031] In addition, the mooring device 30 has the nails 32 inclined toward the downstream, that is, the angle α2 is 30 degrees≦α2≦90 degrees If the design is made within this range, the engagement force between the nails 32 and the river bottom 19 is increased in relation to the towing force of the tugboat 17. Therefore, it is possible to prevent the nails 32 from coming out of the river bottom 19 due to the pulling force of the towing rope 18. Furthermore, if there are multiple nails 32, the towing force applied from the towing rope 18 to the curved portion 29 is distributed to the multiple nails 32. Therefore, it is possible to reliably prevent the nails 32 from coming out.

[0032] (Another example of ship mooring equipment) Another example of the ship mooring facility 16 shown in Fig. 1 is shown in Fig. 4. The ship mooring facility 16 shown in Fig. 4 has a mooring device 30, a buoy (buoy) 33, and a connector 34. The purpose of this facility is to enable the location of the anchoring part 28 to be immediately confirmed when the tugboat 17 is connected to the ship mooring facility 16 by the towing line 18, to enable the ring 18A at the second end of the towing line 18 to be easily hooked to the anchoring part 28 and the main body part 27 by passing the ring 18A at the second end of the towing line 18 through the connector 34 connected to the buoy 33 and crawling along the ring 18A, and to enable a ship passing through the river mouth 15 in peacetime when there is no risk of river flooding to visually confirm the exact positions of the piles 20, the anchoring part 28, and the mooring device 30 on the river bottom 19 from above the water surface 10A, thereby ensuring the safety of navigation of other ships in peacetime.

[0033] The buoy 33 is, for example, a hollow sphere, and the diameter of the buoy 33 is less than the inner diameter of the ring 18A. The buoy 33 is made of a material that floats on the water surface 10A, for example, a synthetic resin, and the surface of the buoy 33 is colored, for example, orange or yellow, so that it is easily visible. A first end of a connector 34 is connected to the buoy 33. A second end of the connector 34 is connected to the locking portion 28. The connector 34 includes, for example, a rope, a wire, etc. The second end of the connector 34 can be connected to the locking portion 28 and detached from the locking portion 28.

[0034] When the rise in the water level of the river 10 is not to be suppressed, the towing rope 18 is not engaged with the piles 20 or the mooring device 30. When the rise in the water level of the river 10 due to heavy rain or the like is to be suppressed, the towing rope 18 is lowered from above the water surface 10A as shown by the two-dot chain line, and the buoy 33 and the connector 34 are advanced into the ring 18A. Furthermore, the locking portion 28 is advanced into the ring 18A, and the ring 18A is engaged with the curved portion 29. Then, with the towing rope 18 connected to the tugboat 17 and the bow 24 facing upstream, the drive source 23 is rotated to rotate the screw 22.

[0035] On the other hand, when the towing rope 18 is to be removed from the mooring device 30, the towing rope 18 is raised in the river 10 as shown by the two-dot chain line, and the connector 34 and the buoy 33 are pulled out from the ring 18A. If the ship mooring equipment 16 is provided with the buoy 33, the positions of the piles 20 and the mooring device 30 can be visually confirmed from above the water surface 10A, and the positions can be easily known, and the towing rope 18 can be easily hooked onto the piles 20 and the mooring device 30, improving convenience. The second end of the connector 34 connected to the buoy 33 may be designed to be connected to and detached from the piles 20 directly buried in the riverbed 19, as shown in FIG. 2.

[0036] Fig. 5(A) shows yet another example of the ship mooring facility 16. The ship mooring facility 16 shown in Fig. 5(A) is an example in which a single towing rope 18 and pile 20, or a single towing rope 18 and mooring device 30 is provided. Since the ship mooring facility 16 in Fig. 5(A) has a single towing rope 18 and pile 20, or a single towing rope 18 and mooring device 30, it is possible to prevent drifting objects, such as driftwood, flowing from the upstream of the river 10 from getting caught on the towing rope 18. It is also possible to prevent the navigation of ships other than the tugboat 17 from being hindered by the towing rope 18.

[0037] The ship mooring equipment 16 shown in FIG. 5(B) is an example in which a plurality of towing ropes 18 and piles 20, or a plurality of towing ropes 18 and mooring devices 30 are received. The plurality of piles 20 are arranged in pairs in a direction intersecting the flow direction A1. The plurality of mooring devices 30 are arranged in pairs in a direction intersecting the flow direction A1. The reason for providing a plurality of mooring devices 30 is to distribute the towing force of the tugboat 17 and reduce the risk of the piles 20 or mooring devices 30 coming off the riverbed 19. In the ship mooring equipment 16 shown in FIG. 5(B), the tugboat 17 is connected to the plurality of piles 20 or the plurality of mooring devices 30 via the plurality of towing ropes 18, respectively. Therefore, if the bow 24 is directed upstream, the propulsion direction B1 of the tugboat 17 can be prevented from fluctuating, and there is no need to operate a steering device (not shown).

[0038] In this regard, when the tugboat 17 is moored with one pile 20 or mooring device 30, the tugboat 17 must always be facing upstream, and therefore steering operations cannot be stopped, so when the tugboat 17 is moored with two piles 20 or mooring devices 30, there is an advantage that stability can be significantly increased. The ship mooring equipment 16 shown in Fig. 5(B) may have three or more towing lines 18 connected to one tugboat 17.

[0039] FIG. 6 shows yet another example of the ship mooring equipment 16. The ship mooring equipment 16 has a plurality of tugboats 17, a towing line 18, an auxiliary towing line 35, and piles 20A or mooring devices 30A. The piles 20A or mooring devices 30A are provided on the right bank 13 and the left bank 14. The two piles 20A are arranged at the same position in the flow direction A1 of the river 10. The two mooring devices 30A are arranged at the same position in the flow direction A1 of the river 10. Of the piles 20A, the main body 27 shown in FIG. 2 is buried in the right bank 13 and the left bank 14. Of the mooring devices 30A, the plate 31 shown in FIG. 3(A) is placed on the right bank 13 and the left bank 14, and the nails 32 are driven into the right bank 13 and the left bank 14. The piles 20A or the mooring devices 30A may be provided directly on the right bank 13 and the left bank 14, or may be provided indirectly on pillars (mooring pillars) on the right bank 13 and the left bank 14.

[0040] Both ends of the towing rope 18 are connected to two piles 20A or two mooring devices 30A. The towing rope 18 is located above the water level of the river 10. A plurality of tugboats 17, for example, three tugboats 17, are floating on the river 10. The three tugboats 17 are arranged at intervals between the right bank 13 and the left bank 14. The bows 24 of the three tugboats 17 are all facing upstream of the river 10. In addition, the three tugboats 17 are each connected to the towing rope 18 via an auxiliary towing rope 35. The auxiliary towing rope 35 includes, for example, a rope, a wire. The auxiliary towing rope 35 is connected to a hull-side fastener 26 shown in FIG. 1(B).

[0041] In the ship mooring facility 16 shown in FIG. 6, the screw 22 rotates in the same manner as in FIG. 1(B), and the propulsive force of each tugboat 17 is generated. The propulsive force of each tugboat 17 is transmitted to the towing rope 18 via the auxiliary towing rope 35. The towing rope 18 is transmitted to two piles 20A or two mooring devices 30A, and each tugboat 17 is kept stopped with its bow 24 facing upstream. Therefore, in the ship mooring facility 16 shown in FIG. 6, the water flow from the river 10 to the sea 11 is promoted. Therefore, the ship mooring facility 16 shown in FIG. 6 can obtain the same effect as the ship mooring facility 16 shown in FIGS. 1(A) and (B).

[0042] In addition, in the ship mooring facility 16 shown in FIG. 6, the piles 20A or the mooring devices 30A are provided on the right bank 13 and the left bank 14, which are part of the land 12. Therefore, unlike a mooring facility in water, the ship mooring facility 16 shown in FIG. 6 is installed on land, so that the installation work of the piles 20A or the mooring devices 30A can be easily performed and the installation cost can be reduced. In the ship mooring facility 16 shown in FIG. 6, the number of tugboats 17 connected to the towing line 18 may be one, two, or four or more. However, it should be noted that in this mooring method, the towing line 18 crosses the flow direction A1 of the river, so there is a risk of driftwood or the like getting caught on the towing line 18, and there is a drawback that other ships cannot pass through the river mouth 15.

[0043] Another example of the mooring device 30 is shown in Fig. 7. The basic configuration of the mooring device 30 shown in Fig. 7 is the same as that of the mooring device 30 shown in Figs. 3(A) and (B). In the mooring device 30 shown in Fig. 7, the main body 27 is attached to the plate 31 via a support shaft 36. The main body 27 is operable in a clockwise and counterclockwise direction around the support shaft 36 in Fig. 7. In addition, a biasing member 37 is provided. The biasing member 37 is formed of, for example, a metallic compression spring. The biasing member 37 serves to bias the main body 27 in a counterclockwise direction in Fig. 7.

[0044] Furthermore, a stopper 38 is provided on the plate 31. The stopper 38 plays a role of stopping the main body 27, which is pushed by the biasing member 37, at a predetermined position by coming into contact with the main body 27. When the main body 27 is stopped at a predetermined position, the angle α1 between the imaginary line C1 and the imaginary line C2 is 30 degrees≦α1≦90 degrees When the main body 27 is stopped at a predetermined position, an arrangement space E1 is provided between the tip of the locking portion 28 and the upper surface of the plate 31. Note that, regardless of the position of the main body 27, the height of the upper end of the stopper 38 in the vertical direction is less than the height of the upper end of the curved portion 29.

[0045] In the mooring device 30 of Fig. 7, when the screw 22 of the tugboat 17 rotates as in Fig. 1(B) with the towing rope 18 hung on the curved portion 29, the towing force of the towing rope 18 is applied to the curved portion 29. Then, the main body 27 is pressed against the stopper 38, and the angle α1 can be prevented from becoming less than 30 degrees. Therefore, the towing rope 18 can be prevented from coming off the curved portion 29.

[0046] When the towing rope 18 is not hung on the curved portion 29 and the ship sails downstream on the river 10 and the bottom of the ship comes into contact with the curved portion 29, the following action occurs. The main body 27 moves clockwise around the support shaft 36 against the pressing force of the biasing member 37. When the bottom of the ship leaves the curved portion, the main body 27 moves counterclockwise due to the pressing force of the biasing member 37 and stops when the main body 27 comes into contact with the stopper 38. Therefore, damage to the bottom of the ship and the mooring device 30 can be prevented as much as possible. The mooring device 30 shown in FIG. 4, the mooring device 30 shown in FIG. 5(A), or the mooring device 30 shown in FIG. 5(B) may have the configuration of the mooring device 30 shown in FIG. 7.

[0047] An example of the technical meaning of the matters described in this embodiment is as follows. The ship mooring equipment 16 is an example of a ship mooring equipment. The piles 20, 20A and the mooring devices 30, 30A are each an example of a mooring device. The tugboat 17 is an example of a ship. The bow 24 is an example of a bow. The screw 22 is an example of a screw. The towing rope 18 is an example of a towing rope. The riverbed 19 and the land 12 are each an example of a place of use. The arrangement space E1 is an example of an arrangement space. The main body 27 of the pile 20 is an example of a buried part. The nails 32 of the mooring devices 30, 30A are each an example of a buried part.

[0048] The curved portion 29 is an example of a curved portion. The pile 20 is an example of a pile. The plate 31 is an example of a plate. The nail 32 is an example of a nail. The connector 34 is an example of a connector. The buoy 33 is an example of a buoy. The support shaft 36 is an example of a support shaft. The biasing member 37 is an example of a biasing member. The stopper 38 is an example of a stopper. Figures 2, 3(A), 4, and 7 are examples of "vertical plan views along the flow direction of the river". The virtual lines C1 and C4 are each an example of a first virtual line. The virtual line C2 is an example of a second virtual line.

[0049] This embodiment also discloses the following "river water level adjustment method." For example, the water level adjustment method includes the steps of floating a ship in the river with its bow facing upstream, connecting a towing line to the ship, connecting a mooring device fixed at the place of use to the towing line, and rotating a screw of the ship to promote the water flow in the river.

[0050] This embodiment is not limited to those disclosed using the drawings, and various modifications are possible without departing from the spirit of the present invention. For example, the shapes, structures, dimensions, numbers, etc. of the elements and parts disclosed in this embodiment can be modified as desired within the scope of solving the problems of this embodiment. Furthermore, the work boat as a ship includes tugboats, dredgers, salvage ships, etc. Furthermore, the ship includes not only work boats, but also merchant ships, fishing boats, etc. [Industrial Applicability]

[0051] This embodiment can be used as a ship mooring facility for preventing river flooding and flooding. [Explanation of symbols]

[0052] 12...land, 16...ship mooring equipment, 17...tugboat, 18...tow line, 19...river bottom, 20, 20A...pile, 30, 30A...mooring device, 22...screw, 24...bow, 27...main body, 29...curved portion, 31...plate, 32...nail, 33...buoy, 34...connector, 36...support shaft, 37...biasing member, 38...stopper, C1, C2, C4...imaginary line, E1...arrangement space

Claims

1. A ship that is floated at the mouth of a river with its bow facing upstream of the river and has a screw that generates propulsion; a towing line connected to the vessel; A mooring device connected to the towing rope and fixed at a place of use; having The mooring device has an arrangement space for holding the towing rope in a connected state, The arrangement space is closed on an upstream side of the river and is open on a downstream side of the river, The tether has an axially shaped embedded portion that is embedded in a location where the tether is to be used, In a vertical plan view along the flow direction of the river, a first virtual line located at a center of the buried portion is inclined with respect to a horizontal second virtual line; A ship mooring equipment, wherein the first virtual line is inclined with respect to the second virtual line so that, in a vertical plan view along the flow direction of the river, the upper end of the buried portion is located downstream of the lower end of the buried portion.

2. The ship mooring equipment according to claim 1, A ship mooring facility, wherein, when viewed in a vertical plane along the flow direction of the river, the mooring device has a curved portion at its upper end in the vertical direction.

3. The ship mooring equipment according to claim 2, The mooring device is a ship mooring facility that is installed on the riverbed of the river.

4. The ship mooring equipment according to claim 3, The mooring device includes piles that are embedded in the riverbed.

5. The ship mooring equipment according to claim 3, The mooring device is A plate placed on the riverbed; A main body portion protruding from an upper surface of the plate and to which the towing rope is connected; nails embedded in the riverbed to secure the plate to the riverbed; having The embedded portion is the nail, The curved portion is connected to the main body portion.

6. The ship mooring equipment according to claim 3, A connector having a first end connected to the tether; a buoy connected to the second end of the connector and floating on the surface of the river; The ship mooring equipment further comprises:

7. The ship mooring equipment according to claim 5, In a vertical plan view along the flow direction of the river, the main body is operable around a support shaft provided on the plate, The mooring device is a biasing member that biases an upper end of the main body toward the upstream of the river; a stopper that stops the main body portion biased by the biasing member at a predetermined position; The ship mooring equipment further comprises:

8. The ship mooring equipment according to claim 2, The mooring equipment is a ship mooring facility provided on land located on both sides of the river.

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