JP5225930B2 - Undulating wave breaker - Google Patents

Description

  The present invention relates to a undulation type wave breaker.

  Conventionally, a wave breaker plate that can be raised and lowered by a rotating support part fixed on the breakwater between a lying posture that can be used as a walkway along a substantially horizontal plane and a standing posture that protrudes upward to prevent waves. (Gate) is provided. And there exists a undulation type wave-proof device provided with the undulation drive device which raises and lowers this wave-breaking plate between a lying posture and an upright posture (refer to patent documents 1).

  In addition, a foundation having a swinging support portion (hinge) that can swing horizontally in the axis is provided on the seabed at a point where the progress of the tsunami is to be prevented. And the water stop board (gate) provided with the rocking | fluctuation support part (hinge) which functions by combining with the rocking | fluctuation support part on this foundation is arrange | positioned by making the side with a rocking | fluctuation support part into a land side. Furthermore, there is a tsunami breakwater provided with a water stop plate standing posture holding mechanism (such as a retaining belt) that stabilizes the water stop plate when standing (see Patent Document 2).

  Since the standing wave breaker of Patent Document 1 supports the wave breaker plate by a rotation support portion (hinge) so that it can be raised and lowered, a plurality of hinge fittings are respectively attached to the wave breaker side and the breakwater side. Since a hinge shaft for connecting both metal fittings is also required, there is a problem that the hinge structure is complicated and the number of parts increases. In addition, since the undulation of the wave preventing plate is performed by a undulation drive device such as a hydraulic cylinder, there is a problem that the cost of the device is increased and a backup at the time of a power failure is required.

  On the other hand, in the tsunami breakwater of Cited Reference 2, the water stopping plate falls near the seabed in normal times, and when the tsunami arrives, the water stopping plate automatically stands up by the wave force of the tsunami. No undulating drive is required.

JP 2003-239243 A JP 2006-342653 A

  However, in the tsunami breakwater of Patent Document 2, since the waterstop is supported by the swing support part (hinge) so as to be raised and lowered, the hinge structure is complicated and the number of parts is increased as in the case of the cited document 1. There's a problem.

  Moreover, in order to make it easy for the tsunami water flow to flow below the water stop plate at the time of lodging, it is necessary to maintain the elevation angle of the water stop plate by the base side protrusion for starting the water stop plate. In order to omit this foundation side protrusion, a technique is disclosed in which a gap is formed on the lower surface of the water stop plate to facilitate the flow of the tsunami water flow below the water stop plate. There was a problem that could only be dealt with.

  The present invention has been made in order to solve the above-mentioned problems, and eliminates the need for hinge fittings of the door body (gate) (hingeless type), provides a simple support structure with a small number of parts, and is also suitable for pushing waves. It is an object of the present invention to provide a undulating wave breaker that can handle pulling waves.

  In order to solve the above-described problems, the present invention is a undulation type wave breaker capable of swinging between a lying position that falls in a substantially parallel state with respect to the water bottom surface and a standing position that rises in a substantially vertical state with respect to the water bottom surface. In the lodging position, one end that receives the wave force in the pushing wave direction and the other end that receives the wave force in the pulling wave direction are set above the bottom surface of the water. One end is connected to the bottom surface of the door body, and the other end is near the other end portion of the door body. Is connected to the first fixed belt for swingably supporting the other end of the door body, and one end is connected to the water bottom surface in the direction of the pulling wave, and the other end is connected to the vicinity of the one end of the door body. A second fixed belt that supports one end portion of the door body in a swingable manner, and pushes the door body in a wave direction. A first holding member that holds the door body in a standing position against the undulation, and a second holding member that holds the door body in the standing position against a wave force in a pulling wave direction. A type of wave breaker is provided.

  As in claim 2, in claim 1, the first holding member has one end connected to the water bottom surface in the direction of the push wave and the other end connected to the vicinity of one end of the door body. The first retaining belt is held in an upright position against wave force in the push wave direction, and the second holding member has one end connected to the bottom surface in the wave direction and the other end of the door body. It is preferable that the second retaining belt is connected to the vicinity of one end portion and holds the door body in the standing position against the wave force in the pulling wave direction.

  As in claim 3, in claim 1 or 2, in the door body, both the upper and lower surfaces between the one end portion and the other end portion are substantially symmetrical outward in a generally circular arc shape or substantially inclined shape in a side view. It is preferable to be formed.

  As in a fourth aspect, in the first to third aspects, a plurality of the door bodies are arranged side by side, and a guide plate for restricting the lateral movement of the door bodies is provided between adjacent door bodies. It is preferable.

  As in Claim 5, in Claims 1 to 4, the door body is preferably formed in a hollow shape, and the hollow portion is preferably filled with a liquid.

  As in claim 6, in claim 5, a liquid valve capable of supplying and discharging liquid and a gas valve capable of supplying and discharging gas are provided in the hollow portion of the door body. Can do.

  As in claim 7, in claim 5, the hollow portion of the door body is partitioned into two chambers at approximately the middle between the one end portion and the other end portion, and liquid can be supplied to and discharged from the hollow portions of the respective chambers. A liquid valve and a gas valve capable of supplying and discharging gas may be provided.

  According to the present invention, since the door body (gate) normally falls to the fall position of the water bottom surface (for example, about 0 degrees with respect to the water bottom surface, the same applies hereinafter), the navigation of the ship is not affected.

  When a push wave is generated by a tsunami, storm surge, secondary vibration, etc., wave force in the push wave direction flows into a gap (elevation angle) between one end of the door body and the bottom surface of the water, thereby causing one end of the door body. Is generated upward, and the other end has a downward couple.

  At this time, if the lower surface of the door body is substantially arc-shaped, the fulcrum and the center of gravity gradually move toward the other end, so that the lower surface rolls on the water bottom while the lower surface rolls on the bottom surface (for example, It gets up to about 30 degrees). And if a fulcrum and a gravity center move to the other end part, since this other end part is connected with the 1st fixed belt, a door will come to rotate centering on the other end part. That is, the door body rolls to a standing position (for example, about 90 degrees) after rolling from a lying position to a predetermined angle. Further, the door body is held at the standing position against the wave force in the pushing wave direction by the first holding member. As a result, the push wave is suppressed by the door body in the standing position.

  On the other hand, when the push wave ends and a pulling wave is generated, the door body falls to the lying position on the bottom of the water. Then, wave force in the pulling wave direction flows into the gap between the other end portion of the door body and the water bottom surface, so that an upward couple is generated at the other end portion of the door body and downward at one end portion. .

  At this time, if the lower surface of the door body is substantially arc-shaped, the fulcrum and the center of gravity of the door body gradually move toward the one end, so that the lower surface rolls on the water bottom and a predetermined standing angle (for example, about It gets up to 30 degrees). And if a fulcrum and a gravity center move to one end part, since this one end part is connected with the 2nd fixed belt, a door will come to rotate centering on one end part. That is, the door body rolls to a standing position (for example, about 90 degrees) after rolling from a lying position to a predetermined angle. Further, the door body is held in the standing position against the wave force in the pulling direction by the second holding member. As a result, the pulling wave is suppressed by the door body in the standing position.

  Therefore, if the undulating wave breaker is installed at the entrance (waterway) partitioned by the breakwater at the port, the tide level in the port can be prevented from rising suddenly by the push wave, and the tide level in the port can be drastically increased by the pulling wave. It will be possible to suppress the lowering. Moreover, if it is installed at the river mouth, it is possible to prevent the push waves from going back up the river and overflowing from the upstream bank. Note that when installed at the river mouth, there is no particular need for countermeasures against the pulling wave. In such a case, the door body can be held near the fall position by the second holding member.

  Thus, the door body supports the other end portion of the door body in a swingable manner with the first fixing belt, and supports the one end portion of the door body in a swingable manner with the second fixing belt. Since there is no need for multiple hinge fittings and hinge shafts as in the background art (hingeless type), the support structure is simple and the number of parts is reduced (hingeless gate).

  The first fixed belt has one end connected to the water bottom in the direction of the push wave and the other end connected to the vicinity of the other end of the door body. The second fixed belt has one end connected to the bottom surface in the wave direction and the other end connected to the vicinity of one end of the door. Therefore, the position of the door body is restricted by the first fixing belt and the second fixing belt so that the door body does not move in either the pushing wave direction or the pulling wave direction at the lying down position.

  Furthermore, in the case of the hinge type as in the background art, the resistance moment due to the dead weight of the door body is maximum at the start of standing from the lying down position, and the resistance moment gradually decreases with standing. Therefore, when starting to stand from the lying down position, a mechanism for raising the door to a certain angle by using aerodynamic force or the like is required. On the other hand, in the hingeless type of the present invention, at the start of standing from the lying position for both the push wave and the pulling wave, the above-described couple forces up to a predetermined standing angle (for example, about 30 degrees). It gets up naturally, and then gets up to the standing position by wave force. Therefore, at the start of standing from the lying position, the resistance moment due to the weight of the door body is zero (0), and the resistance moment gradually increases with standing, so that aerodynamic force and the like are raised compared to the hinge type. No mechanism is required, and it can stand up easily only with wave power. Also, when wave power disappears, it will slowly fall down.

  According to the second aspect, since each holding member is a retaining belt, the same belt material as that of each fixed belt can be shared, so that manufacturing and management are facilitated. If there is no particular need for countermeasures against pulling waves, the door body can be held near the fall position by shortening the second retaining belt in advance.

  According to claim 3, if both the upper and lower surfaces of the door body are formed in a substantially symmetrical outward substantially circular arc shape or substantially inclined shape (substantially tree leaf shape), the upper and lower surfaces have the same shape, so that the manufacturing operation is easy. At the same time, there is no restriction on the orientation of the one end and the other end at the time of installation, so that the installation work is facilitated. Moreover, since it becomes a biconvex shape in a side view, the rigidity is improved.

  According to the fourth aspect, the lateral movement of the side-by-side doors can be reliably restricted by the guide plate.

  According to the fifth aspect, since the door body is hollow in one chamber, it is lightweight at the time of manufacturing and transporting, is easy to handle, and has a liquid (seawater or river water at the site). Etc.) can be installed on the bottom of the water on the spot, so that the installation work becomes easy.

  According to the sixth aspect, when the buoyancy is applied to the door body by supplying the gas from the gas valve at the same time as discharging the liquid from the liquid valve, the rising speed of the door body is increased and even a small wave force is applied. It becomes possible to stand up.

  According to the seventh aspect, since the hollow portion of the door body is partitioned into two chambers, the liquid is discharged from the liquid valve in one of the one end and the other end, and at the same time, the gas is discharged from the gas valve. When the buoyancy is applied to the gas supply side (upper chamber), the door body can be forcibly raised. Conversely, when the gas is discharged from the upper chamber, the liquid is supplied and the liquid is discharged from the lower chamber, and at the same time, the gas is supplied, so that gravity is applied to the liquid supply side (upper chamber). Can be forced to surrender.

It is a schematic diagram for demonstrating the principle of the undulation type | formula wave breaker of embodiment of this invention, (a) is a top view at normal time, (b) is a side view. FIG. 2 is a schematic diagram of FIG. 1, where (a) is a plan view at the time of a push wave, and (b) is a side view. FIG. 2 is a schematic diagram of FIG. 1, where (a) is a plan view at the time of a pulling wave, and (b) is a side view. (A) is explanatory drawing of the couple which acts on a door body, (b)-(d) is a side view of the modification of a door body. (A) is explanatory drawing of the movement of the fulcrum of a door body, and a gravity center, (b) is a chart for comparing the resistance moment by the dead weight of a door body. (A) is explanatory drawing of the door body of background art, (b) is explanatory drawing of the door body which concerns on this invention. It is the block diagram which actualized the undulation type | formula wave-proof device of embodiment of this invention, (a) is a top view at normal time, (b) is a side view. 8 is a configuration diagram of FIG. 7, (a) is a plan view at the time of a push wave, (b) is a side view. It is a block diagram of FIG. 7, (a) is a top view at the time of a drawing wave, (b) is a side view. (A) is the II sectional view taken on the line of Fig.7 (a), (b) is a side view of the door body which provided the buoy. It is a one-room type door body, (a) is a side view at normal times, and (b) and (c) are side views at the time of pushing waves. It is a one-room type door body, (a) is a side view at normal times, and (b) and (c) are side views at the time of drawing. It is a two-chamber type door body, (a) is a side view at normal times, and (b) and (c) are side views at the time of pushing waves. It is a two-chamber type door body, and (a) and (b) are side views when forcibly falling from the standing position of the push wave. It is a two-chamber type door body, (a) is a side view at normal times, and (b) and (c) are side views at the time of pulling. It is a two-chamber type door body, (a) (b) is a side view at the time of forced fall from the standing position of a pulling wave.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. 1 to 4 (a) are schematic views for explaining the principle of the undulating wavebreaker according to the present invention.

  FIG. 1A is a plan view in a normal state (when there is no pushing wave or pulling wave), and FIG. 1B is a side view. FIG. 2A is a plan view at the time of a push wave, and FIG. 2B is a side view. FIG. 3A is a plan view at the time of a pulling wave, and FIG. 3B is a side view. FIG. 4A is an explanatory diagram of a couple acting on the door body (gate) 1.

  The door body 1 is installed on a water bottom 2 such as an entrance (water channel) or a river estuary partitioned by a breakwater in a harbor, and has a substantially rectangular shape extending in a width direction such as an entrance in a plan view. When the width of the doorway is wide, as will be described later, a plurality of door bodies 1 are arranged side by side so as to cover the width (see FIG. 7A). .

  The door body 1 falls down in a substantially parallel state with respect to the water bottom surface 2 (see FIG. 1A), and standing positions U1 and U2 that rise in a substantially vertical state with respect to the water bottom surface 2 (see FIG. 2B). ), See FIG. 3B].

  The door body 1 has a first end portion 1a that receives wave force in the pushing wave direction a and a second end portion 1b that receives wave force in the pulling wave direction b above the water bottom surface 2 at the normal lying position D. Is set to A space between at least the end portions 1a and 1b and the lower surface 1d contacting the water bottom surface 2 is formed in a substantially arc shape in a side view. As a result, a gap (elevation angle) f for allowing wave power to flow in is naturally formed between the end portions 1a and 1b and the lower surface 1d that contacts the water bottom surface 2.

  Specifically, both the upper and lower surfaces 1c and 1d between the one end 1a and the other end 1b are formed in an outward substantially arcuate shape (substantially tree leaf shape) that is substantially symmetrical in a side view.

  The door body 1 is formed into a hollow shape by welding the upper and lower surfaces 1c, 1d and both side surfaces 1e, 1f of stainless steel plate or the like, and is formed in the hollow portion 3 of this one chamber [see FIG. 11 (a)]. Filled with an appropriate amount of liquid. Thereby, since buoyancy does not arise in the door body 1, it becomes possible to install in the fall position D on the water bottom surface 2. FIG. It is also possible to fill a solid (iron lump etc.) instead of the liquid.

  For the door body 1, a plurality of (in this example, two at a predetermined interval in the width direction) first fixing belts 4 are provided. The flexible first fixing belt 4 has one end 4 a connected to the water bottom 2 in the push wave direction a, extends along the lower surface 1 d of the door body 1, and the other end 4 b of the door body 1. It is connected to the other end 1b.

  The first fixing belt 4 supports the other end 1b of the door body 1 so as to be swingable. The first fixing belt 4 is rotated rightward after the door body 1 rolls in the right direction from the lying position D (see FIG. 2B) and is pushed with the other end 1b in contact with the water bottom 2 as a fulcrum. The length is such that it rises to the standing position U1 in the wave direction a. The reason for rotating after rolling will be described later.

  A first retaining belt (first holding member) 6 is provided at the same position as each first fixing belt 4. This flexible first retaining belt 6 has one end 6a connected to the water bottom surface 2 in the push wave direction a, extends in a loop shape in the direction opposite to the push wave direction a, and the other end 6b is the door body. 1 is connected to one end 1a.

  The first retaining belt 6 rotates to the right after the door body 1 rolls in the right direction from the lying position D (see FIG. 2B), and the first fixing belt 4 stands up in the pushing wave direction a. When getting up to U1, the door body 1 is set to such a length as to hold the door 1 in the standing position U1 against the wave force in the wave direction a.

  The door body 1 is provided with a plurality of second fixing belts 5 (in this example, two at a predetermined interval in the width direction) so as not to overlap with the first fixing belt 4. The flexible second fixed belt 5 has one end 5 a connected to the bottom surface 2 in the wave drawing direction b, extends along the lower surface 1 d of the door body 1, and the other end 5 b is one end of the door body 1. It is connected to the part 1a.

  The second fixing belt 5 supports the one end portion 1a of the door body 1 so as to be swingable. The second fixed belt 5 rotates left (see FIG. 3B) after the door 1 rolls leftward from the lying position D (see FIG. 3 (b)), and the second fixed belt 5 has a pulling wave with one end 1a contacting the water bottom 2 as a fulcrum. The length is such that it rises to the standing position U2 in the direction b. The reason for rotating after rolling will be described later.

  A second retaining belt (second holding member) 7 is provided at the same position as each second fixing belt 5. This flexible second retaining belt 7 has one end 7a connected to the bottom surface 2 in the wave drawing direction b, extends in a loop shape in the opposite direction to the wave drawing direction b, and the other end 7b is a door body. 1 is connected to the other end 1b.

  The second retaining belt 7 rotates left [see FIG. 3 (b)] after the door body 1 rolls leftward from the lying position D (see FIG. 3B), and the standing position in the pulling wave direction b by the second fixing belt 5. When it gets up to U2, it is set to such a length that the door body 1 is held in the standing position U2 against the wave force in the pulling wave direction b.

  Each of the belts 4 to 7 is preferably made of, for example, reinforced rubber, but may be made of a flexible metal.

  Instead of the first and second retaining belts 6, 7, the door body 1 is held at the standing position U <b> 1 against the wave force in the pushing wave direction a, and the door body 1 is resisted against the wave force in the pulling direction b. Thus, a stopper member (first and second holding members) can be provided on the door body 1 so as to be held at the standing position U2.

  The principle of the undulating wave breaker constructed as described above will be described in detail. As shown in FIG. 1, the door body 1 does not affect the navigation of the ship or the like because it normally falls to the fall position D of the water bottom surface 2 (for example, about 0 degrees with respect to the water bottom surface, the same applies hereinafter). In this normal wave flow, the door body 1 is slightly swung.

  As shown in FIG. 4A, when a tsunami, storm surge, sub-vibration, or the like generates a push wave, the wave force in the push wave direction a is a gap between the one end 1a of the door body 1 and the water bottom 2. By flowing into (elevation angle) f, a couple P is generated upward at one end 1a of the door 1 and downward at the other end 1b.

  At this time, since the lower surface 1d of the door body 1 is substantially arc-shaped, the lower surface 1d of the door body 1 moves on the water bottom surface 2 as the fulcrum H and the center of gravity G gradually move toward the other end 1b. It moves up naturally to a predetermined standing angle (for example, about 30 degrees) while moving. When the fulcrum H and the center of gravity G move to the other end 1b, the other end 1b is connected to the first fixing belt 4, so that the door 1 rotates around the other end 1b. Become. That is, the door body 1 rotates to the standing position (for example, about 90 degrees) U1 after rolling from the lying position D to a predetermined angle. The reason for the movement and rolling of the fulcrum H and the center of gravity G of the door body 1 will be described later.

  On the other hand, when the push wave ends and then a pulling wave is generated, the door body 1 falls to the lying position D of the water bottom 2. And, the wave force in the pulling direction b flows into the gap between the other end 1b of the door body 1 and the water bottom surface 2, so that the other end 1b of the door body 1 faces upward and the one end 1a has A downward couple P is generated.

  At this time, since the lower surface 1d of the door body 1 is substantially arcuate, the lower surface 1d of the door body 1 rolls on the water bottom surface 2 as the fulcrum H and the center of gravity G gradually move toward the one end 1a. However, it naturally comes up to a predetermined standing angle (for example, about 30 degrees). And if the fulcrum H and the gravity center G move to the one end part 1a, this one end part 1a is connected with the 2nd fixing belt 5, Therefore The door body 1 comes to rotate centering on the one end part 1a. That is, the door body 1 rotates to the standing position (for example, about 90 degrees) U2 after rolling from the lying position D to a predetermined angle. The reason for the movement and rolling of the fulcrum H and the center of gravity G of the door body 1 will be described later.

  Therefore, as shown in FIG. 2, when a push wave is generated, the other end 1 b of the door body 1 is connected to the first fixing belt 4, so that the door body 1 rolls in the right direction. Right-turn Q around the other end 1b. And since the one end part 1a of the door body 1 is connected with the 1st retention belt 6, the door body 1 comes to be hold | maintained in the standing position U1 against the wave force of the pushing wave direction a. As a result, the push wave is suppressed by the door body 1 at the standing position U1.

  Further, as shown in FIG. 3, when the pushing wave is finished and then the pulling wave is generated, the one end portion 1a of the door body 1 is connected to the second fixed belt 5, so that the door body 1 is moved in the left direction. Rotate counterclockwise around the one end 1a. Since the other end 1b of the door body 1 is connected to the second retaining belt 7, the door body 1 is held at the standing position U2 against the wave force in the pulling direction b. As a result, the pulling wave is suppressed by the door body 1 at the standing position U2.

  In this way, if the undulating wave breaker is installed at the entrance (waterway) partitioned by the port breakwater, the tide level in the port can be prevented from rising suddenly by the push wave, and the tide level in the port can be reduced by the pulling wave. It becomes possible to suppress a sudden drop.

  Moreover, if it is installed at the river mouth, it is possible to prevent the push waves from going back up the river and overflowing from the upstream bank. Note that when installed at the river mouth, there is no particular need for countermeasures against pulling waves. In this case, if the second retaining belt 7 is shortened in advance, the door body 1 is held near the lodging position D. I can keep it.

  Here, the reason for the movement, rolling, and rotation of the fulcrum H and the center of gravity G of the door 1 will be described in detail. In order to make the explanation easy to understand, a model of the door body 1 as shown in FIG. The door body 1 has a length L of one end 1a and the other end 1b of 2000 mm, a maximum thickness M of the upper surface 1c and the lower surface 1d is 535.9 mm, and a radius N of the upper surface 1c and the lower surface 1d is 2000 mm. Set. The arc with the radius N is a regular arc centered on an intermediate position of the length L. That is, an equilateral triangle having the same distance from the center O of the radius N to the side between the one end 1a and the other end 1b and the base between the one end 1a and the other end 1b is drawn.

  Here, in the lying position D of the door body 1, the fulcrum H and the center of gravity G are at an intermediate position of the length L (position of the maximum thickness M). The horizontal line S between the one end 1a and the other end 1b is, for example, about 0 degree with respect to the water bottom 2.

  Then, the wave body in the pushing wave direction a (the same applies to the wave force in the pulling wave direction b) flows into the gap (elevation angle) f between the one end portion 1a of the door body 1 and the water bottom surface 2 so that the door body. An upward couple P is generated at one end 1a of 1 and a downward couple P at the other end 1b.

  At this time, as shown in FIG. 6 (b), when the door body 1 is in the lying position D, the fulcrum H and the center of gravity G are at 0 °. And the center of gravity G moves to a position of 5 °. Similarly, when tilted by 10 °, 15 °, 20 °, 25 °, and 30 °, the fulcrum H and the center of gravity G move to positions of 10 °, 15 °, 20 °, 25 °, and 30 °, respectively.

  As a result, the door 1 has the fulcrum H and the center of gravity G gradually moving in the direction of the other end 1b, so that the lower surface 1d rolls on the water bottom 2 to a predetermined standing angle (for example, about 30 degrees). It gets up naturally.

  When the fulcrum H and the center of gravity G move to the other end 1b, the other end 1b is connected to the first fixing belt 4, so that the door body 1 is centered on the other end 1b (as the fulcrum H). It will rotate.

  FIG. 6A shows a hinged door body 1 ′ as a background art for comparison with the hingeless door body 1 according to the present invention, and the door body 1 ′ has one end 1a and the other end in a side view. The length L of 1b is 2000 mm. One end 1a is a free end, and the other end 1b is a fulcrum H fixed by a hinge fitting.

  When the door body 1 ′ is in the lying position D, the center of gravity G is at a position of 0 °. Similarly, when tilted by 10 °, 15 °, 20 °, 25 °, and 30 °, the center of gravity G moves to positions of 10 °, 15 °, 20 °, 25 °, and 30 °, respectively. Note that the fulcrum H does not move.

  FIG. 5B shows a comparison of resistance moments due to the dead weight of the hinged door body 1 ′ of the background art and the hingeless door body 1 according to the present invention.

  In the case of the hinge-type door body 1 ′ of the background art, at the start of standing from the lying down position, the resistance moment due to the weight of the door body is maximum, and the resistance moment gradually decreases with standing up. Therefore, when starting to stand from the lying down position, a mechanism for raising the door to a certain angle by using aerodynamic force or the like is required.

  On the other hand, in the hingeless type door body 1 of the present invention, a predetermined standing angle (for example, about 30) is generated by the above-described couple force at the start of standing from the lying position D with respect to both pushing waves and pulling waves. Up to the degree), and then naturally rises up to the standing position U by wave power. Therefore, at the start of standing from the fall position D, the resistance moment due to the dead weight of the door body 1 is zero (0), and the resistance moment gradually increases with the standing position. In comparison, a mechanism for raising the aerodynamic force or the like is not necessary, and the wave force alone can easily stand up. Also, when wave power disappears, it will slowly fall down.

  If comprised as mentioned above, the door body 1 will support the other end part 1b of the door body 1 by the 1st fixed belt 4 so that rocking | fluctuation is possible, and the one end part 1a of the door body 1 will be supported by the 2nd fixed belt 5. Since it is supported so that it can swing, there is no need for multiple hinge brackets and hinge shafts as in the background art (hingeless type), so the support structure is simple and the number of parts is reduced (hingeless gate). .

  The first fixing belt 4 has one end 4 a connected to the water bottom 2 in the push wave direction a and the other end 4 b connected to the vicinity of the other end 1 b of the door body 1. The second fixed belt 5 has one end 5 a connected to the water bottom 2 in the wave drawing direction b and the other end 5 b connected to the vicinity of the one end 1 a of the door body 1. Therefore, the position of the door body 1 is regulated so that it does not move in either the pushing wave direction a or the pulling wave direction b at the lying position D between the first fixing belt 4 and the second fixing belt 5. Is done.

  Further, since each of the retaining belts 6 and 7 can share the same belt material as that of each of the fixed belts 4 and 5, manufacture and management are facilitated.

  Further, since both the upper and lower surfaces 1c and 1d of the door body 1 are formed in a substantially symmetrical outward substantially circular arc shape (substantially tree leaf shape), the upper and lower surfaces 1c and 1d have the same shape, so that the manufacturing operation is easy. become. Moreover, since there is no restriction on the orientation of the one end 1a and the other end 1b during installation, the installation work is facilitated. Furthermore, since it becomes a biconvex shape in a side view, the rigidity is improved.

  Moreover, since the door body 1 has a hollow shape in one chamber, it is lightweight during manufacture and transport, and is easy to handle, and at the installation site, liquids (such as sea water and river water) are hollow. When the portion 3 is filled, it can be installed on the water bottom 2 on the spot, so that the installation work becomes easy.

  1 to 4A, both the upper and lower surfaces 1c and 1d of the door body 1 are formed in a substantially arc shape, but the upper surface 1c of the door body 1 is a flat surface as shown in FIG. Flat), and only the lower surface 1d can be formed in a substantially arc shape. Also, as shown in FIGS. 4C and 4D, the space between the end portions 1a and 1b and the lower surface 1d contacting the water bottom surface 2 is not substantially arc-shaped but is substantially inclined when viewed from the side. You can also.

  FIGS. 7 to 9 correspond to FIGS. 1 to 3, respectively, and are configurations that embody the principles of FIGS. 1 to 3, and only differences from FIGS. 1 to 3 will be described.

  The first fixing belt 4 has one end 4a connected to the bottom surface 2 in the wave direction a by the axis of the metal fitting 10a, extends along the lower surface 1d of the door body 1, and the other end 1b of the door body 1. The other end 4b is connected to the shaft of the upper metal fitting 10b near the other end 1b.

  The first retaining belt 6 has one end 6a connected to the bottom surface 2 in the push wave direction a by the axis of the metal fitting 11a, and extends in a loop shape in the opposite direction to the push wave direction a, and the other end 6b is the door body. 1 is connected to the shaft of the metal fitting 11b on the upper surface near one end 1a. The metal fitting 11a is provided with a roller 11c for guiding the first retaining belt 6.

  The second fixed belt 5 has one end 5a connected to the bottom surface 2 in the wave pulling direction b by the axis of the metal fitting 12a and extends along the lower surface 1d of the door body 1 so that the one end 1a of the door body 1 is The other end 5b is connected to the shaft of the upper metal fitting 12b near one end.

  The second retaining belt 7 has one end 7a connected to the water bottom 2 in the wave drawing direction b by the axis of the metal fitting 13a, and extends in a loop shape in the opposite direction to the wave drawing direction b, and the other end 7b is a door body. 1 is connected to the shaft of the upper metal fitting 13b near the other end 1b. The metal fitting 13a is provided with a roller 13c for guiding the second retaining belt 7.

  Even in the configurations of FIGS. 7 to 9, similarly to the configurations of FIGS. 1 to 3, the door body 1 falls to the lying position D of the water bottom surface 2 in the normal state of FIG. 7.

  Then, as shown in FIG. 8, when a push wave is generated, the door body 1 rolls in the right direction and then rotates clockwise Q, and the first retaining belt 6 resists the wave force in the push wave direction a. It is held at the standing position U1. Further, as shown in FIG. 9, when the push wave is finished and then the pulling wave is generated, the door body 1 rolls to the left and then rotates to the left, and the second retaining belt 7 moves the pulling direction b. The standing position U2 is held against the wave force.

  In the said embodiment, although the one door body 1 was demonstrated, as mentioned above, when the width | variety of the entrance and exit etc. which were partitioned off by the breakwater of a harbor is wide, Fig.7 (a) and its II line direction As shown in FIG. 10A, which is a front view seen from above, a plurality of door bodies 1 are arranged side by side so as to cover the width.

  In this case, it is preferable to provide a guide plate 14 that restricts the lateral movement of the door body 1 between the adjacent door bodies 1. The guide plate 14 can reliably restrict the lateral movement of the horizontally aligned doors 1.

  Since the door body 1 swings in the underwater position D and the standing positions U1 and U2 in water, it may be difficult to visually confirm it on the water.

  Therefore, as shown in FIG. 10B, buoys 15a and 15b that float on the water surface are attached to one end 1a and the other end 1b of the door body 1 at the lying position D, respectively.

  When the two buoys 15a and 15b are seen on the water surface, it can be easily confirmed that the door body 1 is in the lying position D.

  When the door body 1 rises to the standing position U1 at the time of the pushing wave, the buoy 15b on the other end 1b side is pulled downward and sinks in water. Moreover, when it gets up to the standing position U2 at the time of a pulling wave, the buoy 15a by the side of the one end part 1a will be pulled down and will sink in water. Therefore, when one of the buoys 15a or 15b is visible on the water surface, it can be easily confirmed that the door body 1 is in the standing position U1 or U2. If the colors of the two buoys 15a and 15b are changed, it is possible to confirm whether the standing position U1 at the time of pushing wave or the standing position U2 at the time of pulling wave.

  In addition to the buoys 15a and 15b, for example, an inclinometer 16 is attached to the upper surface 1c of the door body 1, and the lamp is turned on by this signal, whereby the lying position D or the standing positions U1 and U2 can be confirmed.

  In the said embodiment, the door body 1 is installed in the water bottom 2 by filling the hollow part 3 of the door body 1 with the liquid, The filling amount of this liquid can be adjusted suitably.

  That is, as shown in FIG. 11 (a), water (liquid ... see the hatching portion) w is supplied to the hollow portion 3 substantially between the one end 1a and the other end 1b of the upper surface 1c of the door body 1. A water-dedicated valve 18a that can be discharged and an air-dedicated valve 18b that can supply and discharge air (gas: see whitened portion) e are provided. Water / air combined valves 18c and 18d capable of selectively supplying and discharging water w or air e to the hollow portion 3 are provided in the vicinity of the one end 1a and the other end 1b of the upper surface 1c. Pipes (not shown) capable of supplying and discharging water w or air e from the outside are connected to the valves 18a to 18d, respectively.

  Then, before the push wave arrives, the water w is discharged from the water dedicated valve 18a and at the same time the air e is supplied from the air dedicated valve 18b as shown in FIG. As a result, buoyancy is applied to the door body 1.

  Accordingly, as shown in FIGS. 11B to 11C, the rising speed of the door body 1 is increased, and the wave force of a small push wave can be raised.

  Similarly, before the pulling wave arrives, as shown in FIG. 12A, the water w is discharged from the water dedicated valve 18a, and at the same time, the air e is supplied from the air dedicated valve 18b. Is lowered, and buoyancy is applied to the door body 1.

  As a result, as shown in FIGS. 12B to 12C, the rising speed of the door body 1 is increased, and the wave force of a small pulling wave can be erected.

  13 to 16 are modified examples of FIGS. 11 and 12. That is, as shown in FIG. 13 (a), the hollow portion 3 is partitioned into two chambers 3A and 3B by the partition wall 20 at approximately the middle between the one end 1a and the other end 1b of the upper surface 1c of the door body 1.

  For each of the chambers 3A and 3B, a water dedicated valve 18a capable of supplying and discharging water w and an air dedicated valve 18b capable of supplying and discharging air e are provided. Further, near the one end 1a and the other end 1b, water / air combined valves 18c and 18d capable of selectively supplying and discharging water w or air e are provided to the chambers 3A and 3B, respectively.

  Before the push wave arrives, as shown in FIG. 13A, water e is discharged from the water dedicated valve 18a of the push wave side chamber 3A, and at the same time, air e is supplied from the air dedicated valve 18b. Further, water w is supplied from the water dedicated valve 18a of the pulling chamber 3B, and at the same time, the air e is discharged from the air dedicated valve 18b. Thereby, the filling water level of the water w in the push-wave chamber 3A is lowered, and buoyancy is imparted to the push-wave chamber (upper chamber) 3A of the door 1.

  Accordingly, as shown in FIGS. 13B to 13C, the door body 1 can be forcibly raised to the standing position U1 in the pushing wave direction a.

  At the standing position U1 of the door 1, as shown in FIG. 14A, water w is supplied from the water dedicated valve 18a of the push wave side chamber 3A, and at the same time, air e is discharged from the water / air combined valve 18c. . Further, water e is discharged from the water / air combined valve 18d in the chamber 3B on the drawing wave side, and at the same time, air e is supplied from the air dedicated valve 18b. Accordingly, gravity is applied to the push-wave side chamber (upper chamber) 3A to which water is supplied, so that the door body 1 is forced to fall to the fall position D as shown in FIG. be able to.

  Similarly, before the push wave arrives, as shown in FIG. 15A, water w is discharged from the water dedicated valve 18a of the chamber 3B on the drawing wave side, and at the same time, air e is supplied from the air dedicated valve 18b. Further, water w is supplied from the water dedicated valve 18a of the push-wave side chamber 3A, and at the same time, the air e is discharged from the air dedicated valve 18b. As a result, the filling water level of the water w in the pulling-side chamber 3B is lowered, and buoyancy is imparted to the pulling-side chamber (upper chamber) 3B of the door 1.

  Thereby, as shown in FIGS. 15B to 15C, the door body 1 can be forcibly raised to the standing position U2 in the pulling wave direction a.

  At the standing position U2 of the door body 1, as shown in FIG. 16 (a), water w is supplied from the water dedicated valve 18a of the drawing side chamber 3B, and at the same time, the air e is discharged from the water / air combined valve 18d. . In addition, the water w is discharged from the water / air combined valve 18c of the chamber 3A on the push wave side, and at the same time, the air e is supplied from the air dedicated valve 18b. As a result, gravity is applied to the pulling-side chamber (upper chamber) 3B to which water is supplied, so that the door body 1 is forced to fall to the lying position D as shown in FIG. be able to.

  The undulating wave breaker according to the above embodiment is premised on installation on the bottom surface 2 such as an entrance / exit (water channel) or a river estuary partitioned by a breakwater in a harbor, but is not limited thereto. For example, it can be installed on the upper surface of a breakwater or the like in a harbor or a river (if the water is pushed or waved, it becomes a water bottom). It can also be installed in place of sluice gates, sluice gates, tide doors of seawalls, etc.

DESCRIPTION OF SYMBOLS 1 Door 1a One end part 1b Other end part 1c Upper surface 1d Lower surface 2 Water bottom surface 3 Hollow part 3A, 3B Chamber 4 1st fixing belt 5 2nd fixing belt 6 1st retention belt (1st holding member)
7 Second retaining belt (second holding member)
18a-18d Valve 20 Partition wall a Pushing wave direction b Pulling wave direction D Lodging position U1, U2 Standing position

Claims (7)

An undulating wavebreaker capable of swinging between a lying position that falls in a state substantially parallel to the water bottom surface and a standing position that rises in a state substantially perpendicular to the water bottom surface,
In the above-described lying position, one end that receives the wave force in the pushing wave direction and the other end that receives the wave force in the pulling wave direction are set above the water bottom surface, and the bottom surface that contacts the water bottom surface from each end portion. Between and a door body formed in a substantially arc shape or a substantially inclined shape in a side view,
A first fixing belt having one end connected to the water bottom surface in the direction of the push wave and the other end connected to the vicinity of the other end of the door body so as to swingably support the other end of the door body;
A second fixed belt that has one end connected to the bottom surface of the pulling wave direction and the other end connected to the vicinity of one end of the door body so as to swingably support the one end of the door body;
A first holding member that holds the door body in an upright position against wave force in a pushing wave direction;
A undulating wavebreaker comprising a second holding member that holds the door body in an upright position against wave force in a pulling wave direction. The first holding member has one end connected to the water bottom surface in the push wave direction and the other end connected to the vicinity of one end portion of the door body, so that the door body stands up against the wave force in the push wave direction. A first retaining belt held in the
One end of the second holding member is connected to the bottom surface of the pulling direction, and the other end is connected to the vicinity of one end of the door body, so that the door body stands up against the wave force in the pulling direction. The undulating wave breaker according to claim 1, wherein the undulating wave breaker is a second retaining belt that is held on the belt.   2. The door body according to claim 1, wherein both the upper and lower surfaces between the one end and the other end are formed in an outward substantially arcuate shape or substantially inclined shape that is substantially symmetrical in a side view. 2. The undulating wave breaker according to 2.   A plurality of said door bodies are arranged side by side, and a guide plate for restricting lateral movement of the door bodies is provided between adjacent door bodies. The undulating wave breaker according to claim 1.   The undulation type wave breaker according to any one of claims 1 to 4, wherein the door body is formed in a hollow shape, and the hollow portion is filled with a liquid.   The undulating wave breaker according to claim 5, wherein a liquid valve capable of supplying and discharging liquid and a gas valve capable of supplying and discharging gas are provided in a hollow portion of the door body. .   The hollow portion of the door body is partitioned into two chambers approximately in the middle between the one end portion and the other end portion, and a liquid valve capable of supplying and discharging liquid to the hollow portion of each chamber and a gas capable of supplying and discharging gas. The undulation type wave breaker according to claim 5, wherein a valve for operation is provided.

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