Flap gate

Abstract

To reduce the effect of the distance between a hook and an actuator on the configuration of a flap gate.SOLUTION: A flap gate 100 includes a door body 10 that rotates around a predetermined rotation axis X between a lying down state in water and an upright state in water, a mooring device 1 that moors the door body 10 in a lying down state, an air chamber 70 that is disposed underwater and airtightly partitioned, and a communication chamber 73 that is disposed adjacent to the air chamber 70 via a bulkhead 71, has a lower part open to water, and has an air reservoir 74 formed in an upper part. The mooring device 1 has a hook 2 that switches between an engagement state to engage with the door body 10 in a lying down state and a release state to release the engagement with the door body 10, an actuator 3 that generates a driving force, and a transmission mechanism 4 that transmits the driving force of the actuator 3 to the hook 2. The hook 2 is disposed underwater. The actuator 3 is disposed in the air chamber 70. The transmission mechanism 4 is disposed from the air chamber 70 through the bulkhead 71 and the air reservoir 74 to the hook 2.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The technology disclosed herein relates to a relief gate. [Background technology]

[0002] Conventionally, there has been known a rise-and-fall gate that includes a door body that rotates between a lying state in which it is lying down in water and a standing state in which it is standing up from the water, and a mooring device that moors the door body in the lying state. The mooring device includes a hook that engages with the door body. The hook is driven by an actuator. The driving force of the actuator is transmitted from the actuator to the hook via a transmission mechanism. The actuator is disposed above the water. The transmission mechanism is disposed from the actuator above the water to the hook in the water. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-111722 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned undulating gate, if the distance from the actuator to the hook is long, the transmission mechanism is arranged over a long distance, and the transmission efficiency of the driving force decreases. Therefore, it is difficult to arrange the hook at a location far from the actuator. As a result, the size of the gate body, the arrangement of the gate body, and the number of gate bodies when gate bodies are arranged side by side may be restricted.

[0005] The technology disclosed herein has been made in consideration of the above points, and its purpose is to reduce the effect that the distance between the hook and the actuator has on the configuration of the wave-raising gate. [Means for solving the problem]

[0006] The rise and fall gate disclosed herein comprises a door body that rotates around a predetermined rotation axis between a lying down state in which it is lying down underwater and an upright state in which it is raised up from underwater, a mooring device that moor the door body in the lying down state, an air chamber that is disposed underwater and airtightly partitioned, and a communication chamber that is disposed adjacent to the air chamber via a partition wall, with its lower part open to the water and an air pool formed in its upper part, and the mooring device has a hook that switches between an engagement state that engages with the door body in the lying down state and a release state that releases the engagement with the door body, an actuator that generates a driving force, and a transmission mechanism that transmits the driving force of the actuator to the hook, and the hook is disposed underwater, the actuator is disposed in the air chamber, and the transmission mechanism is disposed from the air chamber through the partition wall and through the air pool to the hook. Effect of the Invention

[0007] According to the above-mentioned wave-rising gate, the influence of the distance between the hook and the actuator on the structure of the wave-rising gate can be reduced. [Brief description of the drawings]

[0008] [Figure 1] Figure 1 shows an overview of the port where the relief gates are installed. [Diagram 2] FIG. 2 is a schematic cross-sectional view of a waving gate in a lying state. [Diagram 3] FIG. 3 is a side view showing a schematic configuration of a mooring device. [Figure 4] FIG. 4 is a plan view showing a schematic configuration of a mooring device. [Diagram 5] FIG. 5 is a longitudinal cross-sectional view of the shaft in the through hole. [Figure 6] FIG. 6 is a side view showing a schematic configuration of the mooring device with the door body disengaged. [Figure 7] FIG. 7 is a side view showing a schematic configuration of the mooring device in the middle of mooring the door body. [Figure 8] FIG. 8 is a side view showing a schematic configuration of a mooring device according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an exemplary embodiment will be described in detail with reference to the drawings. Fig. 1 is a schematic view of a port where a relief gate 100 is installed. Fig. 2 is a schematic cross-sectional view of the relief gate 100 in a collapsed state.

[0010] The undulating gate 100 is a facility for holding back water. For example, the undulating gate 100 is installed in the ocean, more specifically, in a port, as a measure against tsunamis and high tides. For example, the undulating gate 100 is placed in an opening 91 formed in a bank body 9. The undulating gate 100 and the bank body 9 constitute a breakwater.

[0011] As shown in FIG. 2, the rise-and-fall gate 100 includes a door body 10 that rotates around a predetermined rotation axis X between a lying-down state in the water and an upright state in the water, a mooring device 1 that moor the door body 10 in the lying-down state, and a storage chamber 7 that houses the mooring device 1.

[0012] The door body 10 is formed in a plate shape extending in a plane formed by a horizontal direction that coincides with the direction of the rotation axis X and a vertical direction perpendicular to the horizontal direction. Specifically, the door body 10 is formed in a substantially rectangular plate shape. The rotation axis X is disposed in a portion of the door body 10 that corresponds to one side of the rectangle. In this example, as shown in FIG. 1, the undulating gate 100 includes four door bodies 10. The four door bodies 10 are arranged so that their respective rotation axes X are aligned in a straight line. The four door bodies 10 are disposed in the opening 91. The door body 10 in the lying down state is submerged in water. The door body 10 in the standing state is partially protruding above the water and closing the opening 91. An air chamber (not shown) is formed inside the door body 10. The door body 10 rotates from a lying down state to a standing state due to the buoyancy applied to the door body 10.

[0013] As shown in FIG. 2, the undulating gate 100 includes a box body 8 in which a storage space 81 is formed to store the door body 10 in a collapsed state. The box body 8 is disposed underwater. The box body 8 is formed in a box shape that opens upward. The internal space of the box body 8 is the storage space 81. The planar shape of the storage space 81 is approximately rectangular, and is slightly larger than the door body 10. In this example, one common storage space 81 is provided for the four door bodies 10.

[0014] An engagement portion 13 is provided on the edge of the door body 10 opposite to the rotation axis X. When a hook 2 of a mooring device 1, which will be described later, engages with the engagement portion 13, the door body 10 is moored in a laid-down state.

[0015] FIG. 3 is a side view showing a schematic configuration of the mooring device 1. FIG. 4 is a plan view showing a schematic configuration of the mooring device 1. FIG. 5 is a vertical cross-sectional view of the shaft 41 at the through hole 72. In FIG. 4, the door body 10 is omitted. The accommodation chamber 7 includes an air chamber 70 that accommodates a part of the mooring device 1 and a communication chamber 73 that accommodates another part of the mooring device 1. The air chamber 70 and the communication chamber 73 are formed in the box body 8. More specifically, the air chamber 70 and the communication chamber 73 are formed inside one side wall of the box body 8. The air chamber 70 and the communication chamber 73 are arranged in a position that is aligned vertically with the door body 10 in the laid-down state and facing the edge of the door body 10 on the opposite side to the rotation axis X.

[0016] The air chamber 70 is disposed underwater and is partitioned airtightly. The air chamber 70 is disposed underwater adjacent to the door body 10 in the laid-down state. More specifically, the air chamber 70 is disposed side by side with the door body 10 in the laid-down state in the vertical direction of the door body 10. The air chamber 70 is partitioned airtightly.

[0017] The air pressure in the air chamber 70 is controlled to a predetermined target pressure. The target pressure is a pressure higher than atmospheric pressure, for example, a pressure equivalent to the water depth of the air chamber 70. The water depth of the air chamber 70 is set based on the standard water level of the water area in which the mooring device 1 is placed. Although not shown in the figure, the air chamber 70 is connected to an air supply source via an air piping. A pressure reducing valve is provided in the air piping. Air from the air supply source has its pressure adjusted by the pressure reducing valve and is supplied to the air chamber 70.

[0018] A buffer chamber 77 is disposed adjacent to the air chamber 70. A first hatch 78 is provided between the air chamber 70 and the buffer chamber 77. When the first hatch 78 is open, the air chamber 70 and the buffer chamber 77 communicate with each other. When the first hatch 78 is closed, the air chamber 70 and the buffer chamber 77 are airtightly isolated from each other. A second hatch 79 is also provided in the buffer chamber 77. When the second hatch 79 is open, the buffer chamber 77 communicates with the external space of the buffer chamber 77. When the second hatch 79 is closed, the buffer chamber 77 and the external space are airtightly isolated from each other.

[0019] The communication chamber 73 is disposed adjacent to the air chamber 70 via a partition wall 71. The communication chamber 73 is disposed adjacent to the air chamber 70 underwater. One wall that divides the air chamber 70 is the partition wall 71 that separates the air chamber 70 from the communication chamber 73. In relation to the door body 10, the communication chamber 73 is disposed adjacent to the door body 10 in the collapsed state. More specifically, the communication chamber 73 is disposed in line with the door body 10 in the collapsed state in the vertical direction of the door body 10. The lower part of the communication chamber 73 is open to the water, and an air reservoir 74 is formed in the upper part of the communication chamber 73. That is, the lower part of the communication chamber 73 is water-sealed, and an air reservoir 74 is formed in the upper part of the communication chamber 73.

[0020] The air pressure of the air reservoir 74 is controlled to a predetermined target pressure. The target pressure is a pressure higher than the atmospheric pressure, for example, a pressure equivalent to that of the air chamber 70. In detail, a first air pipe 75 is connected to the air reservoir 74. The first air pipe 75 is connected to the air chamber 70 via a check valve 75b. The first air pipe 75 is provided with an electric valve 75a. When the electric valve 75a is opened, air is supplied from the air chamber 70 to the air reservoir 74 according to the pressure difference between the air chamber 70 and the air reservoir 74. Specifically, when the pressure of the air reservoir 74 is lower than the pressure of the air chamber 70, air is supplied from the air chamber 70 to the air reservoir 74, and the pressure of the air reservoir 74 becomes equivalent to the pressure of the air chamber 70. For example, the target pressure of the air chamber 70 is set in accordance with the standard water level of the water area in which the mooring device 1 is arranged. Regarding the water level of the communication chamber 73, a standard water level of the communication chamber 73 is set corresponding to the standard water level of the water area where the mooring device 1 is arranged. The standard water level of the communication chamber 73 is higher than the lower opening end of the communication chamber 73 (i.e., the lower end of the side wall that divides the communication chamber 73 so that it opens downward) by a predetermined water level difference (this water level difference is called the "standard water level difference"). When the water level of the water area where the mooring device 1 is arranged is equal to or higher than the water level obtained by subtracting the standard water level difference of the communication chamber 73 from the standard water level of the water area, the electric valve 75a is opened. On the other hand, when the water level of the water area where the mooring device 1 is arranged is lower than the water level obtained by subtracting the standard water level difference of the communication chamber 73 from the standard water level of the water area, the solenoid valve 75a is closed. When the water level of the water area where the mooring device 1 is arranged is the standard water level, the pressure of the air reservoir 74 is usually equivalent to the water depth from the standard water level. However, if air has leaked from air reservoir 74 to air chamber 70 due to water level fluctuations and the air in air reservoir 74 has decreased, the water level in communication chamber 73 may rise and the pressure in air reservoir 74 may not reach the pressure equivalent to the water depth from the standard water level. In such a case, air can be supplied from air chamber 70 to air reservoir 74 via check valve 75b by opening motor-operated valve 75a.

[0021] A second air pipe 76 may be connected to the air chamber 70. The second air pipe 76 is connected to the air chamber 70. A manual valve 76a is provided in the second air pipe 76. The manual valve 76a is manually operated by the user. When the manual valve 76a is opened, the air chamber 70 and the air reservoir 74 are connected to each other. When the pressure in the air reservoir 74 is lower than the pressure in the air chamber 70, air is supplied from the air chamber 70 to the air reservoir 74, and the pressure in the air reservoir 74 becomes equal to the pressure in the air chamber 70. When the manual valve 76a is closed, the second air pipe 76 is shut off.

[0022] The undulating gate 100 has the same number of mooring devices 1 as the number of door bodies 10. In this example, the undulating gate 100 has four mooring devices 1. That is, one mooring device 1 is provided for one door body 10. The mooring device 1 has a hook 2, an actuator 3 that generates a driving force, and a transmission mechanism 4 that transmits the driving force of the actuator 3 to the hook 2. In this example, the mooring device 1 has two hooks 2. The mooring devices 1 are arranged in a vertical line with respect to the door body 10 in the laid-down state.

[0023] The hook 2 switches between an engagement state in which it engages with the door body 10 in the laid-down state and a release state in which it releases the engagement with the door body 10. The hook 2 is disposed near the door body 10. More specifically, it is disposed underwater near the engagement portion 13 of the door body 10 in the laid-down state. The hook 2 is disposed outside the air chamber 70 and the communication chamber 73.

[0024] The hook 2 is non-rotatably attached to the shaft 21. The shaft 21 is supported rotatably about the rotation axis A. The rotation axis A is approximately parallel to the rotation axis X. The hook 2 extends from the shaft 21 in the radial direction of the rotation axis A. The shaft 21 is disposed in water. The hook 2 is located on the engagement portion 13 of the door body 10 in the laid-down state at a predetermined rotational position around the rotation axis A. In this state, the hook 2 engages with the engagement portion 13. This position is referred to as the "engagement position." The state in which the hook 2 engages with the engagement portion 13 is referred to as the "engagement state."

[0025] The shaft 21 is provided with a counterweight 23 that rotates the hook 2 in the circumferential direction around the rotation axis A. More specifically, the shaft 21 has a first arm 21a and a second arm 21b that extend in the radial direction of the rotation axis A. The second arm 21b is disposed at a position that is approximately 180 degrees different from the hook 2 around the rotation axis A. The counterweight 23 is suspended from the second arm 21b. The counterweight 23 generates a moment that rotates the hook 2 in a direction that moves it upward from the engagement position. A transmission mechanism 4 is connected to the first arm 21a, which will be described in detail later.

[0026] The actuator 3 includes a hydraulic cylinder 31 and a sensor 35 that detects the stroke amount of the hydraulic cylinder 31. The hydraulic cylinder 31 includes a cylinder tube 32 and a piston rod 33 that advances and retreats relative to the cylinder tube 32. A hydraulic circuit is connected to the hydraulic cylinder 31, and oil is supplied to and discharged from the hydraulic circuit. The sensor 35 is a so-called stroke sensor, and detects the displacement of the piston rod 33 relative to the cylinder tube 32. For example, the sensor 35 is a magnetostrictive stroke sensor.

[0027] The actuator 3 (i.e., the hydraulic cylinder 31 and the sensor 35) is disposed in the air chamber 70. The cylinder tube 32 is supported rotatably about a rotation axis B. In this example, the hydraulic cylinder 31 is disposed such that the piston rod 33 protrudes downward from the cylinder tube 32.

[0028] The transmission mechanism 4 is disposed from the air chamber 70 through the partition wall 71 and the air reservoir 74 to the hook 2. The transmission mechanism 4 includes a shaft 41 that is driven to rotate about an axis C by the actuator 3. The shaft 41 passes through the partition wall 71 in the direction of the axis C and extends inside both the air chamber 70 and the air reservoir 74. As shown in FIG. 5, a through hole 72 through which the shaft 41 passes is formed in the partition wall 71 in the thickness direction thereof. The axis C extends in the direction of the rotation axis X of the door body 10. That is, the axis C is approximately parallel to the rotation axis X.

[0029] The shaft 41 is supported by bearings 42 so as to be rotatable around an axis C. In this example, the shaft 41 is supported by two bearings 42. One of the bearings 42 is disposed in the partition wall 71. The other bearing 42 is disposed in a side wall 710 that faces the partition wall 71, among the side walls that define the communication chamber 73.

[0030] The shaft 41 is rotatably sealed in a through hole 72 of the partition wall 71. In detail, as shown in Fig. 5, the partition wall 71 is provided with a rotary seal 43 that comes into contact with the outer circumferential surface of the shaft 41. The rotary seal 43 is disposed on the communication chamber 73 side of the bearing 42 provided in the partition wall 71. The shaft 41 is slidable relative to the rotary seal 43.

[0031] In this example, two further rotary seals 43 are provided. Specifically, the rotary seal 43 is provided on the partition wall 71 closer to the air chamber 70 than the bearing 42. The rotary seal 43 is provided on the side wall 710 closer to the communication chamber 73 than the bearing 42.

[0032] The transmission mechanism 4 further includes a first transmission mechanism 5 that connects the actuator 3 and the shaft 41 , and a second transmission mechanism 6 that connects the shaft 41 and the hook 2 .

[0033] The first transmission mechanism 5 is disposed in the air chamber 70. The first transmission mechanism 5 includes a lever 51 connected to the actuator 3 and a first link rod 52 connected to the lever 51. The lever 51 has a first end 51a which is one end in the longitudinal direction, and a second end 51b which is the other end in the longitudinal direction. The first link rod 52 has a first end 52a which is one end in the longitudinal direction, and a second end 52b which is the other end in the longitudinal direction.

[0034] The lever 51 is supported at a first end 51a in the air chamber 70 so as to be rotatable around a rotation axis E. A first link rod 52 is connected to a second end 51b of the lever 51 via a spring cylinder 53. Specifically, the second end 51b is connected to a cylinder tube 53a of the spring cylinder 53 so as to be rotatable around a rotation axis F. A first end 52a of the first link rod 52 is connected to a piston rod 53b of the spring cylinder 53.

[0035] The lever 51 is disposed below the rotation axis B. The actuator 3 is connected to a portion of the lever 51 between a first end 51a and a second end 51b (hereinafter referred to as the "middle portion"). Specifically, a tip of a piston rod 33 of a hydraulic cylinder 31 is connected to the middle portion of the lever 51 so as to be rotatable around the rotation axis D.

[0036] The second end 52b of the first link rod 52 is connected to the shaft 41. More specifically, the shaft 41 has a first arm 41a extending in a radial direction of the axis C. The first arm 41a is disposed within the air chamber 70. The second end 52b is connected to the first arm 41a so as to be rotatable around the rotation axis G.

[0037] The second transmission mechanism 6 is disposed in the communication chamber 73 and underwater. The second transmission mechanism 6 has a plurality of links connecting the shaft 41 and the hook 2. Specifically, the second transmission mechanism 6 includes a second link rod 61 connected to the shaft 41, a third link rod 63 connected to the shaft 21 of the hook 2, and a rotating link 62 connected to both the second link rod 61 and the third link rod 63. The second link rod 61 has a first end 61a which is one end in the longitudinal direction, and a second end 61b which is the other end in the longitudinal direction. The third link rod 63 has a first end 63a which is one end in the longitudinal direction, and a second end 63b which is the other end in the longitudinal direction. The second link rod 61, the rotating link 62, and the third link rod 63 are connected to each other so as to be rotatable around an axis extending in the direction of the rotation axis X.

[0038] Specifically, a first end 61a of the second link rod 61 is connected to the shaft 41. Specifically, the shaft 41 has a second arm 41b extending in a radial direction of the axis C. The second arm 41b is disposed within an air reservoir 74 of the communication chamber 73. The first end 61a is connected to the second arm 41b so as to be rotatable around a rotation axis H.

[0039] A second end 61b of the second link rod 61 is connected to the rotation link 62. More specifically, the rotation link 62 is non-rotatably attached to the shaft 64. The shaft 64 is supported rotatably about the rotation axis I. The rotation link 62 and the shaft 64 are disposed in water. The rotation link 62 has a first arm 62a and a second arm 62b extending in the radial direction of the rotation axis I. The second end 61b is connected to the first arm 62a rotatably about the rotation axis J. A portion of the second link rod 61 is disposed in the air reservoir 74, and the remaining portion of the second link rod 61 is disposed in water.

[0040] The third link rod 63 is disposed in water. A first end 63a of the third link rod 63 is connected to the rotation link 62. More specifically, the first end 63a is connected to the second arm 62b so as to be rotatable around the rotation axis K.

[0041] A second end 63b of the third link rod 63 is connected to the shaft 21. More specifically, the second end 63b is connected to the first arm 21a so as to be rotatable around the rotation axis L.

[0042] Rotation axis A, rotation axis B, axis C, rotation axis D, rotation axis E, rotation axis F, rotation axis G, rotation axis H, rotation axis I, rotation axis J, rotation axis K and rotation axis L extend in the direction of rotation axis X, that is, are approximately parallel to rotation axis X.

[0043] Next, the operation of the mooring device 1 will be described. Fig. 6 is a side view showing a schematic configuration of the mooring device 1 with the door body 10 disengaged. Fig. 7 is a side view showing a schematic configuration of the mooring device 1 in the middle of mooring the door body 10. The control device controls the actuator 3. When the actuator 3 operates, the driving force of the actuator 3 is transmitted to the hook 2 via the transmission mechanism 4, and the hook 2 rotates. The control device controls the rotational position of the hook 2 by adjusting the displacement of the piston rod 33 based on the detection result of the sensor 35.

[0044] First, the operation of the mooring device 1 when the hook 2 is released from the door body 10 will be described. In the mooring state, as shown in FIG. 3, the hook 2 is located at the engagement position and is in an engagement state in which it engages with the engagement portion 13 of the door body 10 in the fallen state. From this state, the actuator 3 retracts the piston rod 33. The retraction of the piston rod 33, i.e., the upward movement, causes the lever 51 to rotate upward about the rotation axis E. The upward movement of the second end 51b of the lever 51 causes the first link rod 52 to move upward. The upward movement of the first link rod 52 causes the shaft 41 to rotate around the axis C. The shaft 41 rotates counterclockwise in FIG. 6. For convenience of explanation, the rotation of the shaft 41 in this direction, i.e., the counterclockwise rotation in FIG. 6, is referred to as "reverse rotation". When the shaft 41 rotates reversely, the second link rod 61 moves downward. The downward movement of the second link rod 61 causes the rotating link 62 to rotate around the rotation axis I. The rotating link 62 rotates counterclockwise in FIG. 6. For convenience of explanation, the rotation of the rotating link 62 in this direction, i.e., the counterclockwise rotation in FIG. 6, is referred to as "reverse rotation". When the rotating link 62 rotates in the reverse direction, the third link rod 63 moves upward. The upward movement of the third link rod 63 causes the shaft 21 and the hook 2 to rotate around the rotation axis A. The shaft 21 and the hook 2 rotate counterclockwise in FIG. 6. For convenience of explanation, the rotation of the shaft 21 and the hook 2 in this direction, i.e., the counterclockwise rotation in FIG. 6, is referred to as "reverse rotation". The actuator 3 moves the hook 2 upward from the engagement position to a position that does not interfere with the trajectory of the engagement portion 13 when the door body 10 rotates. Specifically, the control device controls the actuator 3 based on the detection result of the sensor 35 to move the hook 2 out of the path of the engaging portion 13. This causes the hook 2 to disengage from the engaging portion 13. At this time, the counterweight 23 promotes the reverse rotation of the hook 2. When the hook 2 disengages from the engaging portion 13, the door body 10 rotates to an upright position due to buoyancy.

[0045] Next, the operation of the mooring device 1 when the hook 2 is engaged with the door body 10 will be described. When the door body 10 is not moored, the door body 10 is in an upright state. At this time, the hook 2 may be in any state. In this description, the hook 2 is assumed to be located above the engagement position and outside the trajectory of the engagement portion 13 (see the two-dot chain line in FIG. 7).

[0046] From this state, the actuator 3 advances the piston rod 33. The advancement of the piston rod 33, i.e., the downward movement, causes the lever 51 to rotate downward about the rotation axis E. The downward movement of the second end 51b of the lever 51 causes the first link rod 52 to move downward. The downward movement of the first link rod 52 causes the shaft 41 to rotate around the axis C. The shaft 41 rotates clockwise in FIG. 7. For convenience of explanation, the rotation of the shaft 41 in this direction, i.e., the clockwise rotation in FIG. 7, is referred to as "forward rotation". When the shaft 41 rotates forward, the second link rod 61 moves upward. The upward movement of the second link rod 61 causes the rotation link 62 to rotate around the rotation axis I. The rotation link 62 rotates clockwise in FIG. 7. For convenience of explanation, the rotation of the rotation link 62 in this direction, i.e., the clockwise rotation in FIG. 7, is referred to as "forward rotation". When the rotating link 62 rotates forward, the third link rod 63 moves downward. The downward movement of the third link rod 63 causes the shaft 21 and the hook 2 to rotate around the rotation axis A. The shaft 21 and the hook 2 rotate clockwise in FIG. 7. For convenience of explanation, the rotation of the shaft 21 and the hook 2 in this direction, that is, the clockwise rotation in FIG. 7, is referred to as "forward rotation". At this time, the actuator 3 moves the hook 2 to a position below the engagement position and outside the trajectory of the engagement portion 13. More specifically, the control device controls the actuator 3 based on the detection result of the sensor 35, and moves the hook 2 to a position outside the trajectory of the engagement portion 13. After that, the door body 10 is lowered. Since the hook 2 is located outside the trajectory of the engagement portion 13, the engagement portion 13 does not interfere with the hook 2. The door body 10 is lowered until the engagement portion 13 reaches a position below the hook 2. More specifically, the door body 10 is lowered until the engagement portion 13 is outside the rotation trajectory of the hook 2.

[0047] When the engaging portion 13 moves below the hook 2, the actuator 3 retracts the piston rod 33. The hook 2 rotates in the reverse direction by the same operation as when disengaging the hook 2 described above. The actuator 3 moves the hook 2 to the engaging position and maintains it in the engaging position. With the hook 2 in the engaging position, the door body 10 is rotated upward. When the door body 10 rotates upward, the engaging portion 13 engages with the hook 2 from below. This completes the engagement between the engaging portion 13 and the hook 2.

[0048] In the mooring device 1, the lever 51 is suspended from the piston rod 33 of the actuator 3. Therefore, the weight of the lever 51 acts on the advancing side of the piston rod 33. In other words, the weight of the lever 51 generates a forward rotation moment on the hook 2, making it easier to return the hook 2 from the released state to the engaged state.

[0049] In the thus configured undulating gate 100, the actuator 3 is disposed in an air chamber 70 disposed underwater. Since the air chamber 70 is configured to be airtight, the actuator 3 is prevented from being submerged in water. Furthermore, since the sensor 35 is also disposed in the air chamber 70, the sensor 35 is also prevented from being submerged in water. This ensures proper operation of the actuator 3 and the sensor 35.

[0050] Since the actuator 3 is disposed in the air chamber 70 underwater, the actuator 3 can be disposed near the door body 10 in a lying down state underwater. As a result, the distance from the actuator 3 to the hook 2 can be shortened. This reduces the influence, i.e., the restriction, imposed by the distance between the hook 2 and the actuator 3 on the size and arrangement of the door body 10 and the number of door bodies 10 when they are arranged side by side.

[0051] For example, when multiple gate bodies 10 are arranged as shown in FIG. 1, the gate bodies 10 at both ends in the arrangement direction are arranged near land structures such as embankments 9, while the gate body 10 on the inside in the arrangement direction is farther away from the land structure. When the actuator 3 is arranged on the land structure, the distance from the actuator 3 to the hook 2 corresponding to the gate body 10 on the inside in the arrangement direction is long. If the distance between the hook 2 and the actuator 3 is long, it may be difficult to arrange a transmission mechanism for transmitting the driving force, and the loss during transmission of the driving force will also be large. This problem is not limited to the case of arranging multiple gate bodies 10. If the lateral dimension of the gate body 10 is large, depending on the position of the hook 2, the distance from the land structure to the hook 2 will be long, and as a result, the distance between the hook 2 and the actuator 3 will be long.

[0052] However, in the undulating gate 100, the actuator 3 is disposed in an air chamber 70 underwater. When multiple door bodies 10 are arranged, an air chamber 70 is formed near each door body 10 in a fallen state underwater, and the actuator 3 corresponding to each door body 10 can be disposed in the air chamber 70. This allows the actuator 3 corresponding to each door body 10 to be disposed near each door body 10, and the distance between the hook 2 and the actuator 3 can be shortened. Also, in the case of a door body 10 with a large horizontal dimension, an air chamber 70 is formed near the hook 2 underwater, and the actuator 3 can be disposed in the air chamber 70. This allows the actuator 3 to be disposed near the door body 10, and the distance between the hook 2 and the actuator 3 can be shortened.

[0053] For example, the mooring device 1 is arranged in a position aligned vertically with the door body 10 in the laid-down state. The door body 10 is usually arranged so as to block water flowing in a direction intersecting the rotation axis X. In other words, in the water area in which the door body 10 is installed, water tends to flow along the vertical direction of the door body 10. Even if the mooring device 1 and the door body 10 are arranged vertically, the mooring device 1 is arranged below the water surface. Since structures above water such as a machine room are not arranged vertically with the door body 10, the mooring device 1 can be arranged near the door body 10 in the laid-down state without obstructing the flow of water or the passage of ships and the like.

[0054] When the distance between the hook 2 and the actuator 3 is short, the link length of each link included in the transmission mechanism 4 can be shortened, thereby improving the strength of each link against buckling.

[0055] In addition, the transmission mechanism 4 does not include a flexible connecting element and transmits both pulling and pushing forces. Therefore, the actuator 3 can rotate the hook 2 in both circumferential directions around the rotation axis A. As a result, the actuator 3 can control both the operation of engaging the hook 2 with the door body 10 and the operation of releasing the engagement of the hook 2 with the door body 10.

[0056] A communication chamber 73 is formed adjacent to the air chamber 70 via a partition wall 71, and the shaft 41 of the transmission mechanism 4 passes through the partition wall 71 and extends into both the air chamber 70 and the communication chamber 73. The driving force of the actuator 3 is transmitted from the air chamber 70 side to the communication chamber 73 side via the shaft 41. The shaft 41 is sealed by a rotary seal 43 at a through hole 72 of the partition wall 71. The rotary seal 43 prevents water from entering the air chamber 70 from the through hole 72. This ensures the airtightness of the air chamber 70.

[0057] In addition, an air reservoir 74 is formed above the communication chamber 73, and the shaft 41 is disposed in the air reservoir 74 in the communication chamber 73. This prevents the shaft 41 from being submerged in water. Furthermore, the through hole 72 of the partition wall 71 is located at a position higher than the air reservoir 74, i.e., the water level in the communication chamber 73. As a result, the possibility of water entering the air chamber 70 from the through hole 72 is further reduced.

[0058] Since the through hole 72 of the partition wall 71 is sealed by the rotary seal 43, air circulation between the air chamber 70 and the air reservoir 74 is reduced. Even if the water pressure in the communication chamber 73 fluctuates due to fluctuations in the water level of the water area in which the air chamber 70 is located, the air reservoir 74 can be maintained. This makes it possible to prevent the shaft 41 and the through hole 72 in the communication chamber 73 from being submerged in water.

[0059] Furthermore, the air pressure in the air chamber 70 is controlled to a pressure equivalent to the water depth relative to the standard water level of the water area in which the air chamber 70 is placed. This also reduces the flow of air between the air chamber 70 and the air reservoir 74.

[0060] In addition, the air pressure in the air reservoir 74 is adjusted to a pressure higher than atmospheric pressure, for example, the same pressure as that of the air chamber 70. This suppresses fluctuations in the water surface in the communication chamber 73.

[0061] <Modification> Next, a mooring device 201 according to a modified example will be described. Fig. 8 is a side view showing a schematic configuration of the mooring device 201 according to the modified example. The mooring device 201 differs from the mooring device 1 in that the weight of the lever 51 acts on the retracting side of the piston rod 33. The following will focus on the configuration of the mooring device 201 that differs from the mooring device 1. The same components as those of the mooring device 1 will be denoted by the same reference numerals and will not be described.

[0062] Specifically, the configurations of the actuator 3 and the first transmission mechanism 205 of the mooring device 201 are different from those of the mooring device 1. The configuration of the second transmission mechanism 6 of the mooring device 201 is the same as that of the mooring device 1.

[0063] The actuator 3 is disposed in the air chamber 70. The cylinder tube 32 is supported rotatably about a rotation axis B. In the mooring device 201, the hydraulic cylinder 31 is disposed such that the piston rod 33 protrudes obliquely upward from the cylinder tube 32.

[0064] The first transmission mechanism 205 is disposed in the air chamber 70. The first transmission mechanism 205 includes a lever 51 connected to the actuator 3, and a first link rod 52 connected to the lever 51. The lever 51 is supported in the air chamber 70 at a first end 51a so as to be rotatable around a rotation axis E. The lever 51 is disposed at an incline such that a second end 51b is located diagonally above the first end 51a. The first link rod 52 is connected to the second end 51b via a spring cylinder 53.

[0065] The actuator 3 is connected to the middle part of the lever 51. Specifically, the tip of the piston rod 33 of the hydraulic cylinder 31 is connected to the middle part of the lever 51 so as to be rotatable around a rotation axis D. The actuator 3 is connected to the lever 51 so as to support the inclined lever 51 from diagonally below.

[0066] First, the operation of the mooring device 201 when the hook 2 is released from the engagement state of the door body 10 will be described. From the hook 2 engagement state, the actuator 3 retracts the piston rod 33. The retraction of the piston rod 33, i.e., the diagonally downward movement, causes the lever 51 to rotate diagonally downward about the rotation axis E. The diagonally downward movement of the second end 51b of the lever 51 causes the first link rod 52 to move diagonally downward. The diagonally downward movement of the first link rod 52 causes the shaft 41 to rotate in the reverse direction about the axis C, i.e., counterclockwise in FIG. 8. The operation of the second transmission mechanism 6 when the shaft 41 rotates in the reverse direction is the same as that of the mooring device 1. As a result, the shaft 21 and the hook 2 rotate in the reverse direction about the rotation axis A, i.e., counterclockwise in FIG. 8, and the engagement of the hook 2 with the engagement portion 13 is released.

[0067] Next, the operation of the mooring device 201 when the hook 2 is engaged with the door body 10 will be described. For example, the actuator 3 advances the piston rod 33 from a state in which the hook 2 is located above the engagement position and outside the trajectory of the engagement portion 13. The advancement of the piston rod 33, i.e., the diagonally upward movement, causes the lever 51 to rotate diagonally upward about the rotation axis E. The diagonally upward movement of the second end 51b of the lever 51 causes the first link rod 52 to move diagonally upward. The diagonally upward movement of the first link rod 52 causes the shaft 41 to rotate forward about the axis C, i.e., clockwise in FIG. 8. The operation of the second transmission mechanism 6 when the shaft 41 rotates forward is the same as that of the mooring device 1. As a result, the shaft 21 and the hook 2 rotate forward about the rotation axis A, i.e., clockwise in FIG. 8, and the hook 2 moves to a position below the engagement position and outside the trajectory of the engagement portion 13. Next, the door body 10 is lowered until the engaging portion 13 reaches a position lower than the hook 2. After that, the actuator 3 retracts the piston rod 33. The hook 2 rotates in the reverse direction by the same operation as when disengaging the hook 2 described above. The actuator 3 moves the hook 2 to the engaging position and maintains it in the engaging position. With the hook 2 in the engaging position, the door body 10 is rotated upward. When the door body 10 rotates upward, the engaging portion 13 engages with the hook 2 from below. This completes the engagement between the engaging portion 13 and the hook 2.

[0068] In the mooring device 201, the piston rod 33 supports the lever 51 from diagonally below. Therefore, the weight of the lever 51 acts on the retracting side of the piston rod 33. In other words, the weight of the lever 51 generates a reverse rotation moment on the hook 2, making it easier to maintain the hook 2 in a position outside the trajectory of the engagement portion 13 in the released state.

[0069] Other Embodiments As described above, the above embodiment has been described as an example of the technology disclosed in this application. However, the technology in this disclosure is not limited to this, and can be applied to embodiments in which modifications, replacements, additions, omissions, etc. are appropriately performed. In addition, it is also possible to combine the components described in the above embodiment to form a new embodiment. In addition, among the components described in the attached drawings and detailed description, not only components essential for solving the problem but also components that are not essential for solving the problem in order to exemplify the technology may be included. Therefore, the fact that these non-essential components are described in the attached drawings and detailed description should not immediately be taken to mean that these non-essential components are essential.

[0070] For example, the undulating gate 100 is not limited to being installed in a port. The gate may be installed in a river or an estuary, etc. Furthermore, the undulating gate 100 does not have to form a gate-type breakwater together with the embankment 9. In other words, the undulating gate 100 may be installed not in an opening in the embankment, but in an opening defined by opposing side walls, such as a first side wall and a second side wall, in a river or estuary.

[0071] The undulating gate 100 has four door bodies 10, but the number of the door bodies 10 is not limited to this. The number of the door bodies 10 may be 1, 2, 3, or 5 or more.

[0072] When multiple door bodies 10 are provided, a mooring device 1 or 201 is provided for each door body 10. In this case, an air chamber 70 corresponding to each of the multiple mooring devices 1 or 201 may be provided individually, or a common air chamber 70 corresponding to the multiple mooring devices 1 or 201 may be provided. However, when a common air chamber 70 is provided, an air reservoir 74, i.e., a communication chamber 73 is provided individually corresponding to each of the multiple mooring devices 1 or 201.

[0073] Any configuration may be adopted for the actuator 3 as long as it generates a driving force for the hook 2. For example, the actuator 3 may be an electric motor or an air cylinder.

[0074] The transmission mechanism 4 is not limited to the above-mentioned configuration. Any configuration may be adopted for the transmission mechanism 4 as long as it is arranged from the air chamber 70 through the partition wall 71 and the air reservoir 74 to the hook 2. For example, the transmission mechanism 4 may include a transmission element other than a link. For example, the transmission mechanism 4 may include various transmission elements such as a belt, a chain, a feed screw, and a rack and pinion. The configuration, arrangement, number, etc. of the multiple links included in the transmission mechanism 4 may be set arbitrarily.

[0075] This embodiment is a specific example of the following aspect.

[0076] [Embodiment 1] A rise-and-fall gate 100 includes a door body 10 that rotates around a predetermined rotation axis X between a lying state in which it is lying down in water and an upright state in which it is standing up from water, a mooring device 1,201 that moor the door body 10 in the lying state, an air chamber 70 that is disposed underwater and airtightly partitioned, and a communication chamber 73 that is disposed adjacent to the air chamber 70 via a partition 71, with a lower part open to the water and an upper part having an air reservoir 74 formed therein. The mooring device 1,201 has a hook 2 that switches between an engagement state in which it engages with the door body 10 in the lying state and a release state in which it releases the engagement with the door body 10, an actuator 3 that generates a driving force, and a transmission mechanism 4 that transmits the driving force of the actuator 3 to the hook 2, the hook 2 being disposed underwater, the actuator 3 being disposed in the air chamber 70, and the transmission mechanism 4 being disposed from the air chamber 70 through the partition 71 and the air reservoir 74 to the hook 2.

[0077] According to this configuration, the actuator 3 is disposed in the air chamber 70, thereby preventing the actuator 3 from being submerged in water. Therefore, the actuator 3 can be disposed near the door body 10 in the fallen state underwater, and further, the distance between the hook 2 and the actuator 3 can be shortened. Since the distance over which the transmission mechanism 4 transmits the driving force is shortened, the transmission mechanism 4 can be made smaller, and loss during transmission of the driving force is reduced.

[0078] [Mode 2] In the undulating gate 100 described in [Mode 1], the transmission mechanism 4 has a shaft 41 that is driven to rotate around an axis C by the actuator 3, and the shaft 41 penetrates the partition 71 in the direction of the axis C and extends inside both the air chamber 70 and the air reservoir 74.

[0079] According to this configuration, the driving force is transmitted between the air chamber 70 and the communication chamber 73 via the shaft 41. The shaft 41 passes through the partition wall 71 from the air chamber 70 and extends into the air reservoir 74 of the communication chamber 73. In other words, the shaft 41 is not submerged. This prevents water from entering the through-hole 72 of the partition wall 71. As a result, water is prevented from entering the air chamber 70, and the actuator 3 is prevented from being submerged.

[0080] [Embodiment 3] In the undulating gate 100 according to [Embodiment 1] or [Embodiment 2], the shaft 41 is rotatably sealed in the through hole 72 of the partition wall 71 .

[0081] With this configuration, even if water in the communication chamber 73 reaches the through hole 72 via the shaft 41, the water is prevented from entering the air chamber 70 via the through hole 72. This further prevents water from entering the air chamber 70. Furthermore, by sealing the gap between the shaft 41 and the through hole 72, the airtightness of the air chamber 70 is further ensured.

[0082] [Aspect 4] In the undulating gate 100 described in any one of [Aspect 1] to [Aspect 3], the axis C of the shaft 41 extends in the direction of the rotation axis X of the door body 10, and the transmission mechanism 4 includes a plurality of links connecting the shaft 41 and the hook 2, such as a second link rod 61, a rotation link 62 and a third link rod 63, and the plurality of links are connected to each other rotatably around axes extending in the direction of the rotation axis X.

[0083] According to this configuration, the multiple links of the transmission mechanism 4 are arranged parallel to a plane perpendicular to the rotation axis X. This simplifies the arrangement of the multiple links, shortening the distance over which the driving force is transmitted by the multiple links and improving the transmission efficiency of the driving force.

[0084] [Embodiment 5] In the undulating gate 100 according to any one of [Embodiment 1] to [Embodiment 4], the transmission mechanism 4 transmits both a pulling force and a pushing force.

[0085] According to this configuration, the transmission mechanism 4 can appropriately transmit the driving force of the actuator 3 so that the hook 2 changes to either the engaged state or the released state. As a result, the hook 2 can be intentionally controlled to be in the engaged state or the released state, rather than being controlled by chance.

[0086] [Embodiment 6] In the rise and fall gate 100 according to any one of [Embodiment 1] to [Embodiment 5], the actuator 3 includes a hydraulic cylinder 31 and a sensor 35 for detecting the stroke amount of the hydraulic cylinder 31.

[0087] According to this configuration, the hydraulic cylinder 31 and the sensor 35 are protected from submersion because they are disposed in the air chamber 70. As a result, proper operation of the hydraulic cylinder 31 and the sensor 35 is ensured.

[0088] [Aspect 7] In a hoist gate described in any one of [Aspect 1] to [Aspect 6], the door body 10 is formed in a plate shape extending within a plane formed by a horizontal direction that coincides with the direction of the rotation axis X and a vertical direction perpendicular to the horizontal direction, and the mooring device 1, 201 is arranged in a position aligned in the vertical direction with the door body 10 in the laid-down state.

[0089] The door body 10 is usually arranged so as to block water flowing in a direction intersecting with the rotation axis X. That is, in the water area where the door body 10 is installed, water tends to flow along the vertical direction of the door body 10. Even if the mooring device 1,201 and the door body 10 are arranged vertically, the mooring device 1,201 is arranged below the water surface. Since structures on the water such as a machine room are not arranged vertically next to the door body 10, the mooring device 1,201 can be arranged near the door body 10 in the laid-down state without obstructing the flow of water or the passage of ships and the like. [Explanation of symbols]

[0090] 100 Rising Gate 1,201 Mooring equipment 2. Hook 3 Actuator 31 Hydraulic cylinder 35 Sensors 4 Transmission mechanism 41 Shaft 61 Second link rod (link) 62 Rotating Link (Link) 63 Third link rod (link) 10 Door body C axis center X Rotation Axis

Claims

1. A door body that rotates around a predetermined rotation axis between a lying down state in the water and an upright state out of the water; A mooring device that moor the door body in the laid-down state; An air chamber disposed underwater and airtightly partitioned; a communication chamber disposed adjacent to the air chamber via a partition wall, the lower portion of which is open to the water and the upper portion of which has an air reservoir formed therein; The mooring device includes a hook that switches between an engagement state in which the mooring device engages with the door body in the laid-down state and a release state in which the mooring device releases the engagement with the door body, an actuator that generates a driving force, and a transmission mechanism that transmits the driving force of the actuator to the hook, The hook is placed in water; The actuator is disposed in the air chamber, The transmission mechanism is a waving gate disposed from the air chamber through the partition wall, through the air reservoir, to the hook.

2. 2. The undulating gate according to claim 1, the transmission mechanism has a shaft that is rotated about an axis by the actuator, The shaft extends through the bulkhead in the axial direction within both the air chamber and the air reservoir.

3. 3. The undulating gate according to claim 2, A relief gate, the shaft being rotatably sealed in a through hole in the bulkhead.

4. The undulating gate according to claim 2 or 3, The axis of the shaft extends in the direction of the rotation axis of the door body, the transmission mechanism includes a plurality of links connecting the shaft and the hook, A hoist gate in which the multiple links are rotatably connected to each other around an axis extending in the direction of the rotation axis.

5. 4. The undulating gate according to claim 1, The transmission mechanism is a waving gate that transmits both pulling and pushing forces.

6. 4. The undulating gate according to claim 1, The actuator is a lift gate including a hydraulic cylinder and a sensor that detects the stroke amount of the hydraulic cylinder.

7. 4. The undulating gate according to claim 1, The door body is formed in a plate shape extending within a plane formed by a horizontal direction that coincides with the direction of the rotation axis and a vertical direction that is perpendicular to the horizontal direction, The mooring device is a rise-and-fall gate that is arranged in a position aligned in the vertical direction with respect to the door body in the laid-down state.

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