JP2023008233A - Derricking breakwater device - Google Patents

Abstract

To provide a derricking breakwater device in which a door body can stand only when necessary.SOLUTION: A derricking breakwater device comprises: a laid member installed on the sea bottom; a door body capable of oscillating between a laid position and an erected position; a first holding member holding the door body against wave force in a compressional wave direction in the erected position; a second holding member holding the door body against wave force in a backwash direction in the erected position; a first bag body provided below one end and restraining the door body from being erected due to wave force in a backwash direction by receiving liquid supply to inflate; a second bag body provided below the other end and restraining the door body from being erected due to wave force in a compressional wave direction by receiving liquid supply to inflate; and a liquid supply/discharge facility which supplies liquid to the first bag body and the second bag body or which discharges liquid from the first bag body and the second bag body.SELECTED DRAWING: Figure 4

Description

The present invention relates to an undulating breakwater device.

Conventionally, a door body that can be raised from a lying down position substantially parallel to a flooring member to a substantially vertical standing position by wave force, and this door body is moved to the standing position against the wave force in the push wave direction or the back wave direction. There is known an undulating breakwater device provided with a holding belt (see Patent Literature 1).

According to the undulating wave barrier device of Patent Document 1, when excessive waves such as tsunamis occur, the door body is erected by receiving wave force in the pushing wave direction or the backwash direction, and the erected door body is pulled by the belt. Since the door is held in the upright position, the wave-breaking action of the door body held in the upright position can absorb the energy of the waves, thereby reducing the damage caused by tsunamis and the like.

JP 2013-159912 A

However, the gate body of the hoisting type wave breaker of Patent Document 1 is said to stand up due to waves or storm surges generated when a ship passes by, and at that time the gate body and the hull may come into contact with each other and damage the hull. There's a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an undulating breakwater device in which a door can be erected only when necessary.

In order to solve the above-described problems, an undulating type wave breaker according to one aspect of the present invention includes a laying member installed on the bottom of the water, a laid down position in which the laying member falls in a state substantially parallel to the laying member, and The laying member is capable of swinging to a standing position in which the laying member rises up, and in the lying position, the laying member has one end portion that receives the wave force in the push wave direction and the other end portion that receives the wave force in the backwash direction. , and a portion between each end portion and the lower surface that contacts the floor member is formed in a substantially downward arc shape or a substantially trapezoidal shape when viewed from the side; a first holding member for holding the door in the upright position against the directional wave force; a second holding member for holding the door in the upright position against the directional wave force; a first bag that is provided below and expands when supplied with fluid to prevent the door from standing up due to the wave force in the backwash direction; A second bag that receives and expands to prevent the door from standing up due to the wave force in the pushing wave direction, supplies fluid to the first bag and the second bag, or and a fluid supply/discharge facility for discharging fluid from the first bag and the second bag.

According to this configuration, the first bag and the second bag provided below the one end and the other end of the door (both bags are hereinafter collectively referred to simply as "bags"). ) is provided with a fluid supply/discharge facility for supplying/discharging fluid, it is possible to prevent the door from standing up, or to make the door in a state in which it can be raised, if necessary. For example, when an earthquake does not occur and there is no concern about a tsunami, fluid is supplied to the bag, and one end and the other end of the door are supported by the bag that expands with the supply of the fluid. As a result, it is possible to prevent the gate body from standing up due to waves generated when a ship passes through. On the other hand, when an earthquake occurs and there is concern about a tsunami, the fluid can be discharged from the bag body, and the support of the door body by the bag body can be released so that the door body can stand up.

It is preferable that the first bag and the second bag have airtight structures with closed outer peripheries, and expand with the supply of the fluid so that the upper surface protrudes in an arc shape.

According to this aspect, by supporting one end portion and the other end portion of the door member on the upper surface of the bag member that receives the supply of the fluid and protrudes in an arc shape, the door member can be properly prevented from being inadvertently raised. can be done.

The fluid supply/discharge device includes a supply/discharge pipe through which fluid supplied/discharged to/from the first bag body and the second bag body flows; a supply valve for supplying fluid to the first bag body and the second bag body; A discharge valve for discharging fluid from the body and a controller for controlling opening and closing operations of the supply and discharge valves are preferably provided.

According to this aspect, since the bag body is connected to the supply/discharge pipe provided with the supply valve and the discharge valve, by opening/closing the supply valve or the discharge valve, the supply/discharge of the fluid can be appropriately performed. You can switch.

It is preferable that the undulating wave barrier according to claim 3 further includes a seismometer for detecting an earthquake, and the control device opens the discharge valve when an earthquake is detected by the seismometer.

According to this aspect, when the occurrence of an earthquake is detected and the occurrence of a tsunami is assumed, the discharge valve is automatically driven in the opening direction, so the fluid is discharged from the bag according to the drive. As a result, the door body can be put into a state in which it can be raised.

The fluid supply/discharge equipment further includes an emergency discharge valve with a built-in battery, and the emergency discharge valve receives electricity from the battery and is driven in an opening direction when electricity is not supplied from the control device. preferably.

According to this aspect, even if electricity is not supplied to the discharge valve during a power failure, the emergency discharge valve containing the battery is driven in the opening direction, so that the door body can be put in a state in which it can be raised. .

The holding member is preferably an elastic or flexible belt.

According to this aspect, it is possible to reduce the load on the door body when the door is erected.

A hoisting-type wave breaker according to another aspect of the present invention comprises a laying member installed on the bottom of the water, a laid down position in which the laying member falls down in a state substantially parallel to the laying member, and a standing position in which the laying member rises up with respect to the laying member. In the lying position, one end receiving the wave force in the push wave direction and the other end receiving the wave force in the backwash direction are respectively set above the laying member. A door body having a substantially downward arc shape or a substantially trapezoidal shape in a side view between an end portion and a lower surface that contacts the laying member, and the door body is erected against the wave force in the pushing wave direction. a first holding member for holding the door in position; a second holding member for holding the door in the collapsed position against the wave force in the trailing wave direction; a bag that receives and expands to prevent the door from standing up due to the wave force in the pushing wave direction; a fluid supply and discharge device that supplies fluid to the bag or discharges the fluid from the bag; It is characterized by having

For example, when installing an undulating wave barrier near the mouth of a river, there is little need to prevent backwash when a tsunami occurs, and it may be required to prevent only push waves. The undulating wave barrier according to the other aspect is useful in such cases. That is, in the undulating type breakwater device, the bags are installed only at the other end of the door, which is the end opposite to the side receiving the wave force in the pushing wave direction. When a tsunami occurs, the fluid is discharged from the bag body to allow the gate body to stand up due to the wave force in the pushing wave direction, and the upright door body absorbs the wave energy. can. In addition, during normal times when no tsunami due to an earthquake occurs, the bag body expands by being supplied with fluid at the other end, and the second retainer retains the door body in the collapsed position against the wave force in the direction of the backwash. It is possible to appropriately prevent both the erection of the gate body due to the wave force in the push wave direction and the erection of the door body due to the wave force in the backwash direction.

As described above, according to the present invention, it is possible to provide an undulating breakwater device in which the door can be erected only when necessary.

FIG. 2 is a perspective view of the undulating wave barrier according to the first embodiment of the present invention in a normal state; It is a front view of the said undulating type breakwater. It is a top view of the said undulating type breakwater device. It is a side view of the said undulating type breakwater. It is a circuit diagram of the air supply/exhaust equipment concerning the said undulating wave breaker. The air bag when inflated, (a) is a side view, (b) is a front view, and (c) is a plan view. FIG. 4 is a diagram for explaining the function of the air bag, in which (a) is a side view showing a state in which the inflated air bag is in contact with the door body, and (b) is a side view showing the state in which the door body is erected due to contraction of the air bag. Fig. 10 is a side view showing the enabled state; It is a perspective view which shows a state when the door body of the said undulating type wave breaker is raised by pushing waves. It is a top view and (b) is a side view showing the state when the door of the undulating type breakwater device is raised by pushing waves. It is a top view and (b) is a side view showing the state when the door body of the undulating wave breaker is erected by an undertow. It is drawing explaining the function of the laying member which concerns on the said undulating type breakwater, (a) is a perspective view, (b) is a side view. FIG. 10A is a plan view of the undulating breakwater device of the second embodiment of the present invention in a normal state, and FIG. 11B is a side view thereof. It is a top view and (b) is a side view showing the state when the door of the undulating type breakwater device is raised by pushing waves. FIG. 10 is an air bag according to a third embodiment of the present invention, in which (a) is a front view when inflated, (b) is a plan view, and (c) is a side cross-sectional view.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated in detail, referring drawings.

(First embodiment)
1 to 4 are diagrams showing the state of the undulating wave breaker according to the first embodiment of the present invention in a normal state (when there is no push wave or undertow due to an earthquake). As shown in FIGS. 1 to 4, the undulating breakwater device includes a laying member 12 laid at an entrance (waterway) 31 partitioned by a fixed breakwater 30 in a harbor, and a laying member 12 placed on top of the laying member 12. A door (gate) 11, a first air bag 40A (corresponding to the “first bag” in the present invention) installed below one end 11a of the door 11, and the other end of the door 11 11b (corresponding to the "second bag body" in the present invention), and an air supply/exhaust facility 20 for supplying air to and from the first and second air bags 40A and 40B. (corresponding to "fluid supply/exhaust equipment" in the present invention). The first and second air bags 40A and 40B and the air supply/exhaust system 20 include an air supply/exhaust hose 22 extending from the air supply/exhaust system 20, a piping chamber 25 to which the tip of the air supply/exhaust hose 22 is connected, and a piping chamber 25. It is connected by a plurality of flexible hoses 23 that connect air bags 40 . In the following description, the first and second air bladders 40A, 40B may be collectively referred to simply as "the air bladder 40".

The undulating breakwater device can allow or prevent the door 11 from rising depending on whether a tsunami has occurred. For example, when an earthquake does not occur and there is no concern about a tsunami, air is supplied to the air bag 40, and the door 11 is supported by the air bag 40 inflated by the supply of air. As a result, it is possible to prevent the door 11 from inadvertently standing up due to waves generated when the ship 34 passes. On the other hand, when an earthquake occurs and there is concern about a tsunami, air is discharged from the air bag 40 and the support of the door 11 by the air bag 40 is released. As a result, it is possible to allow the door 11 to stand up and reduce the damage caused by the tsunami.

1 and the like, the door 11 has a substantially rectangular shape extending in the width direction of the doorway 31 and the like in plan view. If the width of the entrance/exit 31 or the like is wide, a plurality of units (two units in this example) are arranged side by side so as to cover the width as shown in FIGS. In this case, a guide plate 14 is provided between adjacent door bodies 11 to restrict lateral movement of the door bodies 11 .

When the air bag 40 is contracted (a state in which the air bag 40 is contracted), the door body 11 is in a collapsed position [see FIG. It can swing to a standing position (see FIGS. 9(b) and 10(b)) in which it rises upright. On the other hand, when the air bag 40 is inflated (a state in which the air bag 40 is inflated), the door body 11 cannot be raised to the upright position and is held in the collapsed position.

In the collapsed position when the air bag 40 is inflated, the door body 11 has one end portion 11a that receives the wave force in the push wave direction a and the other end portion 11b that receives the wave force in the backwash direction b. is set higher than At least the portions between the ends 11a and 11b and the lower surface 11d that contacts the laying member 12 are formed in a substantially arc shape when viewed from the side. Specifically, the lower surface 11d between the one end portion 11a and the other end portion 11b is formed in a substantially downward circular arc shape when viewed from the side, and the upper surface 11c is formed in a flat shape (substantially crescent shape).

The door body 11 is formed in a hollow shape by combining and welding upper and lower surfaces 11c, 11d and both side surfaces 11e, 11f of stainless steel plates or the like, and the hollow portion is filled with an appropriate amount of liquid. As a result, no buoyancy is generated in the door body 11, so that it can be installed on the top of the flooring member 12 in the laid down position.

Here, FIG. 11 clarifies the relationship between the door 11 and the floor member 12, and omits description of other members.

As shown in FIG. 11(a), the laying member 12 is formed by combining a steel material or the like comprising an upper surface 12a such as a substantially arc-shaped stainless steel plate, a lower surface 12b fixed to the water bottom 33, and a side surface 12d. It is installed in a closed state, and the inside is filled with liquid etc. so that it does not float. Further, the floor member 12 is provided with a through hole 12c through which the air supply/exhaust hose 22 and the flexible hose 23 pass.

As shown in FIG. 1, the flooring member 12 is installed at the bottom of a recess 33a formed in the water bottom 33, and the door 11 installed on the top of the flooring member 12 is such that the upper surface 11c of the door 11 in the lying down position is in contact with the water floor 33. It is set so as not to protrude significantly upward, so as not to interfere with the navigation of the ship 34 or the like.

A plurality of laying members 12 are installed for one door body 11. - 特許庁In this embodiment, as shown in FIGS. 2, 3, and 11(a), a first laying member 12A, a second laying member 12B, and a third laying member are arranged in order from one end of the door 11. Four laying members 12, 12C and a fourth laying member 12D, are installed.

The upper surface 12a of the laying member 12 facing the lower surface 11d of the door 11 is formed in a substantially upward arcuate shape when viewed from the side, and the lower surface 12b of the laying member 12 is a substantially horizontal rectangular surface.

As a result, the wave between the one end (or the other end 11b) 11a of the door 11 and the horizontal plane K is formed between the lower surface 11d of each of the ends 11a and 11b of the door 11 and the upper surface 12a of the laying member 12. In addition to the gap (elevation angle) f for the force to flow in, a gap (elevation angle) f for the wave force to flow in is naturally formed between the horizontal plane K and the upper surface 12a of the flooring member 12. becomes [see FIG. 11(b)].

A plurality of flexible first fixing belts 4 (in this example, four at predetermined intervals in the width direction) are provided for the door 11 . One end 4a of the first fixing belt 4 is connected to the vicinity of the upstream end of the laying member 12 in the pushing wave direction a, extends along the lower surface 11d of the door member 11, and It is connected to the other end 11 b of the door 11 .

The other end 11b of the door 11 is supported by the first fixing belt 4 so as to be swingable. The first fixing belt 4 has a length such that the door member 11 rolls under the wave force from the pushing wave direction a and rises from the lying position to the standing position with the other end 11b in contact with the floor member 12 as a fulcrum. [see FIG. 9(b)].

At the same position as each first fixed belt 4 (it can be shifted in the width direction as shown in FIGS. 1 and 8), a flexible first restraining belt 6 ("first (corresponding to "holding member") is provided. One end 6a of the first restraining belt 6 is fixed to the laying member 12 via a first turn drum 6c installed at the upstream end of the laying member 12 in the pushing wave direction a. The other end 6 b is connected to one end 11 a of the door 11 .

When the door body 11 rolls upon receiving the wave force from the pushing wave direction a and rises to the standing position, the first restraining belt 6 raises the door body 11 against the wave force in the pushing wave direction a. It should be long enough to hold in position.

One end 4a of the first fixed belt 4 is connected to the laying member 12, and one end 6a of the first restraining belt 6 is fixed to the laying member 12 via the first turn drum 6c. can also be connected to anchor blocks placed on the bottom of the water. The same applies to one end 5a of the second fixed belt 5 and one end 7a of the second restraining belt 7, which will be described later.

For the door 11, a plurality of flexible second fixing belts (in this example, two at predetermined intervals in the width direction) are attached so as not to overlap the first fixing belt 4. One end 5a of the second fixing belt 5 is connected to the vicinity of the upstream end of the laying member 12 in the backwash direction b, and extends along the lower surface 11d of the door 11. , and the other end 5b are connected to one end portion 11a of the door member 11. As shown in FIG.

One end 11a of the door 11 is supported by the second fixing belt 5 so as to be swingable. The length of the second fixing belt 5 is such that the door member 11 rolls under the wave force from the trailing wave direction b and rises from the lying position to the standing position with one end 11a in contact with the floor member 12 as a fulcrum. [See FIG. 10(b)].

At the same position as each second fixed belt 5 (it can be shifted in the width direction as shown in FIGS. 1 and 8), a flexible second restraining belt 7 ("second belt in the present invention") (corresponding to "holding member") is provided. One end 7a of the second restraining belt 7 is fixed to the laying member 12 via a second turn drum 7c installed at the upstream end of the laying member 12 in the direction b of the undertow. , the other end 7b is connected to the other end 11b of the door 11. As shown in FIG.

When the door body 11 rolls upon receiving the wave force from the trailing wave direction b and rises to the standing position, the second restraining belt 7 raises the door body 11 against the wave force in the trailing wave direction b. It should be long enough to hold in position.

Instead of the first and second restraining belts 6 and 7, the door body 11 is held in an upright position against the wave force in the pushing wave direction a, and the door body 11 is held in the upright position against the wave force in the trailing wave direction b. It is also possible to provide a stopper member for the door 11 so as to hold it in the upright position.

As shown in FIGS. 3 and 4 and the like, two first air bags 40</b>A positioned below one end portion 11 a of the door 11 are installed for each door 11 . Specifically, the first air bladder 40A is positioned between the first and second bedding members 12A and 12B and between the third and fourth bedding members 12C and 12D. installed one each.

Two second air bags 40B positioned below the other end portion 11b of the door 11 are installed for each door 11. As shown in FIG. Specifically, the second air bladder 40B is positioned between the first and second bedding members 12A and 12B and between the third and fourth bedding members 12C and 12D. installed one each.

The first air bag 40A serves as a stopper that supports the door 11 from one end 11a, and the second air bag 40B serves as a stopper that supports the door 11 from the other end 11b. These first and second air bags 40A and 40B prevent the door 11 from standing up unless necessary.

Referring to FIG. 6, the air bag 40 has an airtight structure of a sphere whose outer periphery is completely closed, and is made of a flexible film material such as rubber reinforced with synthetic fibers. In this embodiment, a material that becomes a sphere when expanded is used. As for the strength condition, it is desirable that the air bag 40 should be able to withstand an internal pressure of at least 0.15 MPa.

The diameter φ of the inflated air bag 40 (see FIG. 6A) is preferably about 1/10 times the width T of the door 11 (see FIG. 3). For example, when the width T of the door 11 is 13 m, the diameter φ of the air bag 40 is set to approximately 1.3 m. At this time, it is desirable that the contact width C between the inflated air bag 40 and the door member 11 is about 1000 mm.

The air bag 40 is installed on a quadrangular pyramidal pedestal 41 having a square bottom surface and is connected to the flexible hose 23 . The pedestal 41 has a recess 41a in the central portion thereof when viewed from above, into which the air bag 40 can enter.

The flexible hose passes through the inside of the base 41 and is connected to the piping chamber 25 installed outside the base 41 .

When air is supplied to the inside of air bag 40 and air bag 40 expands, one end 11a and other end 11b of door 11 are supported by the upper surface of air bag 40 protruding in an arc shape. 11b is restricted from moving downward. As a result, the door 11 is prevented from standing up unintentionally, for example, by receiving waves from the ship 34 .

Specifically, when a wave in the pushing wave direction a is generated, the second air bag 40B installed in an inflated state below the other end portion 11b of the door 11 supports the door 11 from below. , the other end 11b of the door 11 is restricted from moving downward. As a result, the door body 11 cannot be sufficiently tilted in the pushing wave direction a, and the door body 11 cannot stand up.

On the other hand, when a wave in the undertow direction b is generated, the first air bag 40A installed under the one end portion 11a of the door 11 in an inflated state supports the door 11 from below. 11 is restricted from moving downward. As a result, the door body 11 cannot be sufficiently tilted in the sweep wave direction b, and the door body 11 cannot stand up.

On the other hand, when an earthquake occurs and there is concern about a tsunami, the air inside the air bag 40 can be exhausted under the control of the control device 27, which will be described later, and the door 11 can be allowed to stand up.

In this case, since the air bag 40 is not inflated, the opening of the door body 11 is not blocked by the air bag 40, and the original purpose of the door body 11 to reduce the damage caused by the tsunami can be achieved.

Next, the details of the air supply/exhaust equipment, that is, the mechanism for supplying air to air bag 40 and the mechanism for discharging air from air bag 40 will be described in detail.

The air supply/exhaust facility 20 is installed on a hill away from the door 11, as shown in FIG. 5, the air supply/exhaust system 20 includes a compressor 21a for discharging air, an air receiver tank 21b for stabilizing the pressure of the air, and an air supply hose 21 through which the air discharged from the compressor 21a flows. , an air receiver tank 21b, a pressure reducing valve 21c and an air supply valve 21d provided in the middle of the air supply hose 21, an exhaust hose 24 branched from the air supply hose 21, and an exhaust valve 24a provided in the middle of the exhaust hose and an emergency exhaust valve 24b, an exhaust port 24c connected to the downstream end of the exhaust hose 24, a control device 27 for controlling air supply and exhaust, and a seismometer connected to the control device 27 to detect the seismic intensity of an earthquake. 28 and. The intake valve 21d corresponds to the "supply valve" in the present invention, the exhaust valve 24a corresponds to the "exhaust valve" in the present invention, and the emergency exhaust valve 24b corresponds to the "emergency exhaust valve" in the present invention. do.

The air supply hose 21 is arranged to extend from the compressor 21 a to the air supply/exhaust hose 22 . Between the air supply valve 21d and the pressure reducing valve 21c in the air supply hose 21, a pressure gauge 21e for measuring the pressure of the air after pressure reduction by the pressure reducing valve 21c is provided. is provided with a pressure gauge 21f for measuring the internal pressure of the air bag 40 after air is supplied.

The exhaust hose 24 extends from the intersection A and branches into two branches, one branch is connected to the exhaust port 24c via the exhaust valve 24a, and the other branch is exhausted via the emergency exhaust valve 24b. It is connected to port 24c. The emergency exhaust valve 24b is equipped with a battery that supplies electricity to the emergency exhaust valve 24b during a power outage.

The control device 27 includes a compressor 21a, an air receiver tank 21b, a pressure reducing valve 21c, an air supply valve 21d, pressure gauges 21e and 21f, an exhaust valve 24a, an emergency exhaust valve 24b, a seismometer 28 and an electric properly connected. The control device 27 supplies electricity to and remotely operates each facility, and receives data from the pressure gauges 21 e and 21 f and the seismometer 28 .

Next, the air supply/discharge mechanism of the air bag 40 by the control device 27 will be described separately for three cases: normal time when no tsunami due to an earthquake occurs, earthquake occurrence, and power failure.

<Normal times>
As a normal time, it is assumed that no tsunami due to an earthquake has occurred and that there is a possibility that waves will be generated by the ship 34 . In this case, the controller 27 inflates the air bag 40 and prevents the door 11 from rising according to the procedure described below.

The controller 27 drives the compressor 21a to discharge air. The discharged air is stored in the air receiver tank 21b. The air stored in the air receiver tank 21b is decompressed to a constant pressure by the decompression valve 21c.

The pressure after pressure reduction by the pressure reducing valve 21c is controlled by the controller 27 remotely operating the pressure reducing valve 21c. The pressure after the pressure reduction is measured by a pressure gauge 21 e installed between the pressure reducing valve 21 c and the air supply valve 21 d and transmitted to the control device 27 .

The control device 27 starts supplying air to the air bag 40 by opening the air supply valve 21d while the exhaust valve 24a and the emergency exhaust valve 24b are closed. That is, by opening the air supply valve 21d and closing the exhaust valve 24a and the emergency exhaust valve 24b, the air decompressed by the pressure reducing valve 21c passes through the supply/exhaust hose 22 and the flexible hose 23. and supplied to the air bag 40, and the air bag 40 is inflated.

The control device 27 receives the pressure measured by the pressure gauge 21f installed between the air supply valve 21d and the intersection A, and confirms the completion of the supply of air to the air bag 40 based on the change in the measured value. . If the pressure of the pressure gauge 21f shows a constant value (the value measured by the pressure gauge 21e after pressure reduction by the pressure reducing valve 21c), it means that the supply of air to the air bag 40 has been completed.

After confirming that the supply of air to the air bag 40 is completed, the control device 27 stops the operation of the compressor 21a. In addition, the control device 27 maintains the air supply valve 21 d in the closed state to maintain the pressure of the air filled in the air bag 40 . At this time, the inside of the air bag 40, the inside of the flexible hose 23, the inside of the air supply/exhaust hose 22, the portion of the inside of the air supply hose 21 from the intersection point A to the air supply valve 21d, and the intersection point A of the inside of the exhaust hose 24 , and the exhaust valve 24a are in communication with each other, the internal pressures of these parts are all uniform.

The control device 27 constantly receives the measured value of the internal pressure of the air bag 40 from the pressure gauge 21f, and confirms whether or not there is an air leak in the air bag 40 based on the decrease in the measured value. When an air leak occurs and the value measured by the pressure gauge 21f falls below a certain value, the controller 27 fills the air bag 40 with air again in the same procedure as described above.

By operating the control device 27 as described above, the air bag 40 is inflated to support the door 11 from below as shown in FIG. 7A, thereby preventing the door 11 from rising.

As a result, the door 11 does not stand up due to the waves generated when the ship 34 passes through, so damage to the ship 34 due to contact between the door 11 and the ship 34 can be prevented.

<When an earthquake occurs>
When an earthquake occurs, it is assumed that a tsunami will occur due to the earthquake and that there is a risk of a tsunami occurring.

In this case, the control device 27 automatically drives the exhaust valve 24a in the opening direction, exhausts the air filled in the air bag 40, and allows the door 11 to stand up.

Specifically, the occurrence of an earthquake is detected by a seismometer 28 connected to the control device 27 . When the seismometer 28 detects the occurrence of an earthquake with a seismic intensity equal to or greater than a certain level, the seismograph 28 transmits the data of the earthquake to the control device 27 .

The control device 27 that has received the earthquake data from the seismometer 28 drives the exhaust valve 24a in the opening direction. At the same time, the air inside the air bag 40 whose pressure is higher than the atmospheric pressure is naturally pushed out through the exhaust hose 24 to the outside air. As a result, the air bag 40 contracts as shown in FIG. 7B, and the support of the door 11 by the air bag 40 is released.

When a tsunami occurs due to an earthquake, the control device 27 operates as described above to allow the door 11 to stand up. This makes it possible to reduce damage caused by tsunamis.

<During a power outage>
At the time of a power failure, it is assumed that a power failure occurs due to an earthquake, the control device 27 cannot supply electricity to the exhaust valve 24a, and it is impossible to drive the exhaust valve 24a in the opening direction.

In this case, the battery incorporated in the emergency exhaust valve 24b detects that electricity is no longer supplied from the control device 27, and automatically supplies electricity to the emergency exhaust valve 24b. The emergency exhaust valve 24b is automatically driven in the opening direction when electricity is supplied from the battery.

By operating the emergency exhaust valve 24b in this manner, air is automatically discharged from the air bag 40 even when it is impossible to drive the exhaust valve 24a in the opening direction due to a power failure. The door 11 is allowed to stand up.

(Second embodiment)
A second embodiment of the present invention will be described with a focus on differences from the first embodiment. In the first embodiment, the case where the undulating wave breaker is installed in a place such as a harbor where it is necessary to prevent both pushing waves and undertows has been described. For example, a case of installing in a place where it is less necessary to prevent undertow will be described.

In this case, referring to FIGS. 2 to 4 and FIGS. 12 and 13, the first fixing belt 4, the second fixing belt 5 and the first restraining belt 6 are the same as in the first embodiment, but The second retaining belt 7 is different from that of the first embodiment.

That is, in the second embodiment, flexible stopper belts 8 are provided at the same positions as the second fixed belts 5 . One end 8a of the stopper belt 8 is connected to the vicinity of the upstream end of the laying member 12 in the sweep wave direction b, and the other end 8b is connected in a straight line to the other end 11b of the door 11. .

The length of the stopper belt 8 is such that the door 11 is not rotated to the left while it is maintained at the lowered position, and is held at the lowered position against the wave force in the backwash direction b.

In the second embodiment, the first air bag 40A is not provided below the one end 11a of the door 11, and the second air bag 40B is provided below the other end 11b of the door 11. It is only

Compared with the first embodiment, the undulating wave barrier according to the second embodiment can be simplified in structure by reducing the number of air bags 40 . In normal times when no tsunami due to an earthquake occurs, the second air bag 40B expands by receiving the supply of fluid at the other end 11b, and the door body 11 is moved to the collapsed position against the wave force in the backwash direction b. The holding stopper belt 8 can properly prevent both the rising of the door 11 due to the wave force in the pushing wave direction a and the rising of the door 11 due to the wave force in the trailing wave direction b.

In the second embodiment, unlike the first embodiment, the second turn drum 7c is not installed. 8 may be connected to this second turn drum 7c.

(Third Embodiment)
The third embodiment of the present invention will be described with a focus on differences from the first and second embodiments. In the first and second embodiments, the air bag 40 has an airtight structure whose outer periphery is completely closed and is spherical when inflated. A case of using an air bag 40a which is an airtight structure which is not closed to the outside and has a dome shape when inflated will be described with reference to FIG.

The air bag 40a is designed to have a substantially semicircular shape when viewed from the side and a dome shape when viewed from the front, and does not have a bottom surface.

A clamping portion 40b is provided around the air bag 40a. The pinching portion 40b is pinched by a pinching tool 45, which will be described later, while being in close contact with a seal rubber 48 that prevents air leakage from the air bag 40a. The seal rubber 48 is a flexible film material reinforced with synthetic fibers similar to the air bag 40a.

The air bag 40a is fixed to a fixing portion 42 provided around the upper surface of a pedestal 41b having a square pyramid with a rectangular bottom surface. The fixing portion 42 is for fixing the air bag 40a to the pedestal 41a.

An uneven surface 41c is formed on a portion of the upper surface of the base 41b other than the fixed portion 42, and when viewed from the side, the surface area of the uneven surface 41c is substantially equal to the surface area of the air bag 40a. there is With this configuration, the inside of the air bag 40a and the upper surface of the pedestal 41b are in closer contact with each other when the air bag 40a is deflated. It is possible to prevent damage to the air bag 40a.

A hole 23a is provided in the central portion of the upper surface of the pedestal 41a, and a flexible hose 23 is connected to this hole 23a. The flexible hose 23 passes through the inside of the base 41a and extends to the outside of the base 41a.

14(c), the clip 45 includes a base plate 46 having a projection 46a on its upper surface, a clamping bar 47 having a recess 47a corresponding to the projection 46a, a base plate 46 and a clamp. It is composed of a bolt 49 passing through the ping bar 47 and the fixing portion 42 and a nut 49a screwed onto the bolt 49. As shown in FIG.

With such a configuration, the air bag 40a whose outer periphery is not completely closed can be fixed to the base 41a while preventing air leakage.

Further, the air bag 40a in the third embodiment has a larger contact area with the door 11 than the spherical air bag 40 used in the first and second embodiments, and stably supports the door 11. be able to.

The above-described embodiments merely illustrate preferred specific examples of the present invention, and the present invention is not limited to the above-described embodiments.

For example, it is possible to fill the inside of the door 11 with a solid (iron mass or the like) instead of the liquid.

Although the through hole 12c is provided in the flooring member 12 to allow the air supply/exhaust hose 22 and the flexible hose 23 to pass through, the through hole 12c may not be provided. and flexible hose 23.

Further, the supply/exhaust hose 22 and the flexible hose 23 may be embedded in the water bottom 33 without providing the through hole 12c or the recess.

As for the shape of the laying member 12, the space between the upper surface 12a and the lower surface 12b may be hollow, and the air supply/exhaust hose 22 and the flexible hose 23 may be passed therebetween.

Each of the belts 4 to 8 used in this embodiment is preferably made of, for example, reinforced rubber, but may be made of flexible metal.

The air bag 40 does not necessarily have to be a flexible film material such as rubber reinforced with synthetic fibers, and other materials can be used as long as they are flexible and airtight.

Furthermore, the medium supplied to the air bag 40 does not necessarily have to be air, and other fluids such as water can be used as long as the medium can inflate the air bag 40 and prevent the door 11 from standing up.

In this embodiment, the occurrence of an earthquake is detected by connecting the seismometer 28 to the control device 27, and the exhaust valve 24a is driven in the opening direction. A configuration other than the total 28 may be used. For example, the exhaust valve 24a may be driven in the opening direction when receiving an earthquake early warning or a large tsunami warning.

In addition, it goes without saying that various design changes are possible within the scope of the claims of the present invention.

6 first stop belt (first holding member)
7 second restraining belt (second holding member)
8 stopper belt (second holding member)
11 Door 11a One end 11b Other end 11c Upper surface 11d Lower surface 12 Spreading member 20 Supply/exhaust equipment (fluid supply/exhaust equipment)
21 air supply hose 21d air supply valve (supply valve)
22 supply and exhaust hose 24 exhaust hose 24a exhaust valve (exhaust valve)
24b emergency exhaust valve (emergency exhaust valve)
27 control device 28 seismometer 40A first air bag (first bag body)
40B Second air bag (second bag)
a Push wave direction b Backwash direction

Claims (7)

a laying member installed on the bottom of the water;
It is capable of swinging between a laid down position in which it falls down substantially parallel to the laying member and a standing position in which it rises up relative to the laying member, and in the laid down position, one end receives a wave force in a pushing wave direction and a pulling force is applied. The other end portion that receives the wave force in the wave direction is set above the laying member, and the space between each end portion and the lower surface that contacts the laying member has a downward substantially circular arc shape or a substantially platform shape when viewed from the side. a door body formed into a shape;
a first holding member that holds the door in an upright position against the wave force in the push wave direction;
a second holding member that holds the door in an upright position against the wave force in the trailing wave direction;
a first bag that is provided below the one end and expands when supplied with a fluid to prevent the door from standing up due to the wave force in the backwash direction;
a second bag that is provided below the other end and expands when supplied with a fluid to prevent the door from standing up due to the wave force in the pushing wave direction;
a fluid supply/drainage facility that supplies fluid to the first bag and the second bag or discharges fluid from the first bag and the second bag;
An undulating breakwater device comprising: The first bag body and the second bag body have airtight structures with closed outer peripheries, and are characterized in that when supplied with the fluid, the first bag body and the second bag body are inflated so that the upper surfaces protrude in an arc shape. Item 1. The undulating type breakwater device according to Item 1. The fluid supply and discharge equipment includes:
a supply/discharge pipe through which a fluid to be supplied/discharged to/from the first bag and the second bag flows;
a supply valve installed in the supply/discharge pipe and driven in an opening direction to supply fluid to the first bag and the second bag;
a discharge valve installed in the supply and discharge pipe and driven in an opening direction to discharge the fluid from the first bag and the second bag;
a control device for controlling opening and closing operations of the supply valve and the discharge valve;
The undulating breakwater device according to claim 1 or 2, characterized by comprising: Equipped with a seismometer to detect earthquakes,
4. The undulating breakwater device according to claim 3, wherein the control device opens the discharge valve when an earthquake is detected by the seismometer. The fluid supply and discharge equipment further includes an emergency discharge valve with a built-in battery,
5. The undulating wave barrier according to claim 3, wherein the emergency discharge valve receives electricity from the battery and is driven in an opening direction when electricity is not supplied from the control device. Device. The undulating wave barrier according to any one of claims 1 to 5, wherein the holding member is an elastic or flexible belt. a laying member installed on the bottom of the water;
It is capable of swinging between a laid down position in which it falls down substantially parallel to the laying member and a standing position in which it rises up relative to the laying member, and in the laid down position, one end receives a wave force in a pushing wave direction and a pulling force is applied. The other end portion that receives the wave force in the wave direction is set above the laying member, and the space between each end portion and the lower surface that contacts the laying member has a downward substantially circular arc shape or a substantially platform shape when viewed from the side. a door body formed into a shape;
a first holding member that holds the door in an upright position against the wave force in the push wave direction;
a second holding member that holds the door in the collapsed position against the wave force in the trailing wave direction;
a bag that is provided below the other end and expands when supplied with a fluid to prevent the door from standing up due to the wave force in the pushing wave direction;
a fluid supply and discharge device for supplying fluid to the bag or discharging fluid from the bag;
An undulating breakwater device comprising:

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