JP3265157B2 - Wave generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wave generator for generating waves, and more particularly, to a wave generator capable of generating waves of a uniform size in multiple directions.

[0002]

2. Description of the Related Art A conventional wave generator comprises, for example, a plurality of wavemakers arranged in a horizontal line along a predetermined side wall in a box-shaped water tank for generating waves. Each wave maker,
For example, a plurality of wave-making plates having a width of about 50 cm are arranged in a horizontal row, and each wave-making plate can be reciprocated in the same direction by each cylinder device or the like.

[0003] Waves traveling in a desired oblique direction are generated by independently reciprocating each wave-making plate. At this time, if the waves are generated only by the wavemakers arranged in a horizontal row as described above, for example, the waves to be generated are disturbed by reflected waves from a wall surface of a water tank and the like opposite to the side where the waves are generated. The area where the waves have a uniform size becomes narrow.
For this reason, as shown in FIGS. 4 and 5, a plurality of wavemakers 1 have conventionally been used for the purpose of absorbing the above-mentioned reflected waves and preventing the generation of reflected waves directly facing the required waves. A wave generating device is formed by arranging the wave generator in an L-shape or a U-shape when viewed from above along the side wall in the water tank 2, thereby widening a region where the waves have a uniform size.

Here, when a plurality of wavemakers 1 are arranged along an L-shape or the like in a top view as described above, adjacent wavemakers 1 c
The wave maker 1 cannot be installed in a portion where the reciprocating directions of the waves are different from each other, that is, in a corner portion A in the water tank 2. On the other hand, in the related art, as shown in FIG. 6A, nothing is installed at the corner A, or the sliding plate 20 is installed and stopped as shown in FIG. 6B. There was a wall for water.

[0005]

However, in the conventional wave generator as described above, the wave generator 1 generates a target wave at a corner portion (the corner portion A) of the array of the wave maker 1. Since there is no wave machine 1, when a wave traveling in an oblique direction is generated as described above, for example, a portion where no wave occurs is generated in a region B as shown by a dashed line in FIG.

[0006] This causes a problem that the generation area of a wave having a uniform size is reduced. Further, in the wave generator shown in FIG. 6A, from the end of the wave maker 1 where the corner portion A is arranged, and in the wave generator shown in FIG. Diffraction waves are generated, and portions where unexpectedly large waves are generated also occur. This also narrows the region where waves of uniform size are generated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to widen a region where a uniform wave can be generated.

[0008]

To achieve the above object, according to the Invention The wave generating device as claimed in claim 1 of the present invention, each number for each wave-plate provided with a plurality of wave-plate
The wave maker causing waves separately be reciprocated the entire plate to advance and return, the wave generator configured by arranging a plurality of one another the reciprocating moving of the two wave maker adjacent at intervals isotropic direction is always different, that is arranged in a corner portion
And an auxiliary wave-making mechanism having a plate-like member that is provided between the wave-making plates and that can reciprocate in conjunction with the movement of the wave-making plate.

According to a second aspect of the present invention, a pair of wave-making plates on which the plate-like members are laid are reciprocally moved in the same phase in synchronization with the configuration according to the first aspect. It is characterized by. Further, the invention described in claim 3 is based on the configuration described in claim 1 or 2,
The plate-shaped member of the auxiliary wave-making mechanism is characterized in that a predetermined tension is always applied by a tension applying mechanism to a film member bridged between the adjacent wave-making plates.

[0010]

First, the operation of the present invention will be described. When the pair of wave-making plates on which the plate-like members are mounted reciprocate, the plate-like members of the auxiliary wave-making mechanism also reciprocate in conjunction with the movement of the wave-making plate, and in the reciprocating direction of the plate-like members. A wave can be generated toward it. Thus, a mechanism capable of generating waves is provided in the space between the wave-making plates having different reciprocating directions.

At this time, when the invention described in claim 2 is adopted, a pair of wave-making plates on which the plate-like members are laid reciprocate in phase and in synchronization with each other. Are reciprocated in the same phase in synchronization with each other. Thereby, the plate-like member erected on both wave-making plates reciprocates in the direction corresponding to the plate thickness, that is, in the middle direction of the reciprocating movement direction of the both wave-making plates, without swinging. Become like As a result, the auxiliary wave-making mechanism can reliably generate a wave traveling in a direction corresponding to the thickness of the plate-shaped member.

Next, the operation of the present invention will be described. Since the reciprocating directions of the two wave-making plates on which the plate members are erected are different from each other, the interval between the two wave-making plates approaches and separates according to the reciprocating movement. In view of this, in the invention of claim 3, the membrane member is used as a member to be bridged between the two wave-making plates, and a predetermined tension is always applied to the membrane member by a tension applying mechanism. The members are always tensed. As a result, the portion of the membrane member located between the two wave-making plates has a plate shape having a predetermined rigidity capable of generating a wave, and constitutes a plate-like member.

Further, the plate-like member made of the tensioned membrane member can follow the change in the interval between the two wave-making plates due to its flexibility and the action of the tension applying mechanism. As a result,
Even if the interval between the two wave-making plates changes, the tensioned membrane member reciprocates and can generate a wave.

[0014]

Embodiments of the present invention will be described with reference to the drawings. First, the configuration will be described. As shown in FIG. 4, a plurality of wavemakers 1 are arranged in a U-shape in a top view along a side wall in a water tank 2 as in the related art. Each wave maker 1 has a wave maker main body 1a fixed along the side wall of the water tank 2, a plurality of pistons 1b projecting horizontally from the wave maker main body 1a, and a tip end of each piston 1b. And a plurality of wave-making plates 1c fixed to each other. The piston 1b and the wave-making plate 1c are arranged in a row in the horizontal direction along the side wall of the water tank 2, and are individually reciprocable in the same direction. This makes it possible to generate a wave traveling in a predetermined oblique direction.

At this time, two adjacent wavemakers 1 which are arranged near the corner A of the water tank 2 and adjacent to each other have their wavemaker plates 1c.
Are different from each other in the reciprocating directions of the
Cannot be provided with another wavemaker. In the present embodiment, an auxiliary wave-making mechanism 3 is provided between two wave-making machines 1 arranged near the corner A of the water tank 2. Next, the configuration of the auxiliary wave-making mechanism 3 will be described with reference to FIG.

At each end of the wave-making plate 1c adjacent to the two wave-making machines 1 and facing each other at a predetermined interval, rollers 4 whose shafts are directed vertically are rotatably supported. ing. A film member 5 made of a Teflon plate, hard rubber or the like is stretched between the pair of rollers 4. The film member 5 has one end 5a fixed to the side wall 2a of the water tank 2 and extends from the side wall 2a toward one roller 4a.
The direction of extension is changed by being wound around the one roller 4a, and extends toward the other roller 4b. Further, the film member 5 is wound around the other roller 4b and further extends to another side wall 2b of the water tank 2 while changing its extending direction, and the other end 5b is fixed to the side wall 2a of the water tank 2. .

A spring member 6 constituting a tension applying mechanism is interposed between each roller 5 and each end 5a, 5b fixed to the side wall 2a of the film member 5. The pair of spring members 6 are provided with the rollers 4 of the film member 5.
By always pulling the side portion 5c toward the side walls 2a and 2b of the water tank 2, the film member portion 5 located between the rollers 4 is formed.
It is possible to always apply a predetermined tension to c.

As a result, the film member 5c located between the pair of rollers 4 forms a plate-like member having a predetermined rigidity by being tensioned. Next, the auxiliary wave-making mechanism 3
The operation and the like of the wave generator provided with will be described with reference to FIG. As in the conventional case, the reciprocating motion of each wave-making plate 1c of each wave-making machine 1 is controlled so that a wave traveling in a predetermined oblique direction is generated.

At this time, in the present embodiment, the pair of wave-making plates 1c on which the membrane members 5 are installed are controlled to reciprocate in phase and synchronously. When the two wave-making plates 1c on which the membrane members 5 are installed move in a direction away from each wave-maker main body 1a in synchronization from the position indicated by the solid line to the position indicated by the alternate long and short dash line in FIG. (Hereinafter, the movement toward the center of the water tank 2 is referred to as forward movement, and the movement in the opposite direction is referred to as retreat), and the pair of rollers 4 provided on each wave-making plate 1c also moves forward. The film member 5c located between the pair of rollers 4 also advances in the film thickness direction. At this time, the rollers 4 approach each other in accordance with the above-mentioned forward movement, but the respective ends of the film members 5c located between the rollers 4 are pulled by the spring members 6, respectively. To prevent the membrane member 5c between the rollers 4 from being loosened, and the tension sufficient to push water in the forward direction is applied to the membrane member portion 5c located between the rollers 4.

As a result, the film member 5 between the rollers 4 is
The vehicle advances while maintaining the flat state. Further, the two wave-making plates 1c on which the membrane members 5 are installed advance synchronously and in the same phase, so that the membrane members 5 between the rollers 4 do not rotate around a predetermined vertical axis, and have a film thickness. Move forward in the direction. Subsequently, both the wave-making plates 1c on which the membrane members 5 are installed are
In FIG. 2, in the case of retreating synchronously from the position of the dashed line to the position of the solid line, the pair of rollers 4 provided on each of the wave-making plates 1 c also retreats, thereby forming a pair of rollers. The film member 5c located between the rollers 4 also retreats in the film thickness direction. At this time, the rollers 4 are separated from each other in accordance with the retreat, but the film member 5 moves so as to slide on the rollers 4, and has a length corresponding to the distance between the rollers 4. The membrane member 5c is arranged, and a predetermined tension is applied to the membrane member 5c between the rollers 4 by the spring member 6.
As a result, the film member 5 between the rollers 4 retreats while maintaining the flat shape.

As described above, when the pair of wave-making plates 1c repeatedly advance and retreat in synchronization with each other,
The film member 5 between the rollers 4 also has a flat plate shape,
In other words, reciprocating movement is repeated toward the intermediate direction of the reciprocating movement directions of both wave-making plates 1c, and waves are generated toward the intermediate direction (the oblique direction in FIG. 2) of the reciprocating movement directions of the two wave-making plates 1c. It becomes possible.

Here, in the above description, a case is described in which the two wave-making plates 1c on which the membrane members 5 are laid are reciprocated synchronously and with the same stroke.
For example, the inclination of the membrane member 5c in the reciprocating direction changes by synchronously reciprocating in the front-rear direction in a state where the stroke amount and the stroke position of the two wave-making plates 1c are different from each other. The traveling direction of the wave generated by the membrane member 5c can be changed.

In the above description, the two wave-making plates 1c, on which the membrane members 5 are provided, are reciprocated in synchronization with each other, so that the membrane members 5c constituting the plate members can be moved in the thickness direction without rotating. By shifting the synchronization of the reciprocating movement of the wave-making plate 1c on which the membrane member 5 is laid, the membrane member 5c located between the rollers 4 is moved by a predetermined angle in the left-right direction around the predetermined position. It may be made to reciprocate while rotating only.

As described above, it is possible to generate a wave traveling in a desired direction even from the corner A of the water tank 2 where the wave maker 1 cannot be installed, that is, the conventional wave cannot be generated. As a result, a wave can also be generated in a portion where no wave is generated conventionally (a portion B in FIG. 7) which is generated by not generating a target wave from the corner portion A. Further, by generating a target wave from the corner portion A, it is also possible to suppress a diffracted wave generated from the vicinity of the corner portion A as in the related art. As a result, a region where a uniform wave can be generated becomes wider than before.

At this time, since the auxiliary wave making mechanism 3 only reciprocates in conjunction with the movement of the wave making plate 1c of the wave making machine 1, it does not need to have its own power and is a simple mechanism. Can generate waves. In the wave generator according to the embodiment described above, the side wall 2 in the water tank 2 is used.
Although an example in which the wavemaker 1 is arranged in a U-shape in a top view along a and 2b is shown, the wavemaker 1 may be arranged in an L-shape in a top view. In short, the present embodiment can be applied to a case where the wavemakers 1 are arranged so that the reciprocating directions of the adjacent wavemaker plates 1c are different.

For example, the arrangement can be applied not only to the arrangement in which the adjacent wave-making plates 1c make a reciprocating movement direction at right angles but also to an obtuse angle, such as when they are arranged in the shape of a letter when viewed from above. is there. Further, the wave-making plate 1c on which the membrane member 5 is installed
However, the present embodiment is applicable to an arrangement in which the distance increases as the vehicle moves forward and approaches as the vehicle moves backward.

In the above embodiment, the spring members 6 are interposed at both ends of the membrane member 5. However, it is sufficient that a predetermined tension can always be applied to the membrane member 5 between the rollers 4. The spring member 6 may be inserted only on the part side. In this case, the other end may be fixed to the roller 4. Further, the auxiliary wave-making mechanism 3 is not limited to the above-described structure including the film member 5 and the tension applying mechanism. For example, the auxiliary wave-making mechanism 3 as shown in FIG. 3 may be used. The auxiliary wave-making mechanism 3 is provided with a roller 10 having a shaft oriented vertically in each end of a pair of wave-making plates 1c arranged at a predetermined interval and having different reciprocating directions. Make it pivot. Then, a pair of rollers 10 is brought into contact with a flat plate member 11 constituting a plate member from the side wall of the water tank, and a biasing means 12 (spring) for biasing the flat plate member 11 toward the roller 4. Components).

In this auxiliary wave-making mechanism 3, when each wave-making plate 1c advances from the wave-making machine main body 1a, the flat plate member 11 also advances in the thickness direction by the urging force of the urging means 12. When each wave-making plate 1c retreats, the flat plate member 11 is retreated by being pushed by the wave-making plate 1c. As described above, the flat plate member 11 can reciprocate in the thickness direction in conjunction with the movement of the wave-making plate 1c to generate a wave that advances in the thickness direction.

As a result, the same operation and effect as those of the auxiliary wave-making mechanism 3 composed of the film member 5 and the tension applying mechanism are exhibited.

[0030]

As described above, according to the wave generator of the present invention, the wave generator of the present invention is installed in the space between the wave generators in which the reciprocating movements of the adjacent wave generators are different from each other. Providing the auxiliary wave-making mechanism of the present invention has an effect that a wave traveling in a desired direction can be generated even from a position where the wave-making machine cannot be installed.

In addition, the auxiliary wave-making mechanism does not require independent power for generating waves, and is a simple mechanism, so that it can be easily installed. in this way,
Even if the wave maker is arranged in an L-shape or a U-shape when viewed from above, it is possible to generate a wave in a desired direction from a corner portion of the arrangement of the wave maker, thereby, There is an effect that the influence of such a portion is suppressed, and the area in which a uniform wave can be generated is increased as compared with the related art.

At this time, if the invention described in claim 2 is adopted, the pair of wave-making plates on which the plate-like members are laid are reciprocated synchronously and in the same phase, so that the plate of the auxiliary wave-making mechanism is provided. The shape member can always reciprocate in a direction corresponding to the plate thickness without rotating. As a result, there is an effect that a wave traveling in the thickness direction can be reliably generated.

Further, since the reciprocating movement directions of the pair of wave-making plates that bridge the plate-like member of the auxiliary wave-making mechanism are different, the distance between the wave-making plates approaches and separates according to the reciprocating movement. For example, by adopting the invention described in claim 3, there is an effect that a wave can be reliably generated between both wave-making plates even if the distance between the wave-making plates changes due to the reciprocating movement.

[Brief description of the drawings]

FIG. 1 is a diagram showing an auxiliary wave-making mechanism according to an embodiment of the present invention.

FIG. 2 is a diagram showing an operation of an auxiliary wave-making mechanism in the embodiment of the present invention.

FIG. 3 is a diagram showing another example of the auxiliary wave-making mechanism in the embodiment of the present invention.

FIG. 4 is a diagram showing an example in which the wavemaker 1 is arranged in a U-shape when viewed from above.

FIG. 5 is a diagram showing an example in which the wavemaker 1 is arranged in an L shape when viewed from above.

FIG. 6 is a diagram showing a conventional treatment of a corner portion;
(A) shows a diagram in which no treatment is performed, and (b) shows a diagram in which a sliding plate is arranged.

FIG. 7 is a diagram showing an example of a region where no wave is generated in a conventional wave generator.

[Explanation of symbols]

 A Corner portion 1 Wavemaker 1c Wavemaker 2 Water tank 3 Auxiliary wavemaker 4 Roller 5 Membrane member 6 Spring member (tension applying mechanism)

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-3-214036 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01M 10/00 A47K 3/10 E04H 4 / 00

Claims (3)

(57) [Claims] 1. A wave-making plate comprising a plurality of wave-making plates.
In contrast , in a wave generator configured by arranging a plurality of wave generators that generate waves by making a reciprocating movement in which the entire plate moves forward and backward individually, two wave generators adjacent to each other at an interval are mutually separated. wave generator, characterized in that a supplementary wave mechanism having a plate-like member capable of reciprocating in conjunction is bridged to the reciprocating transfer Dokata direction is always different wave-plates to the movement of the wave-plate apparatus. 2. The wave generator according to claim 1, wherein the pair of wave-making plates on which the plate-like members are installed are reciprocated in the same phase in synchronization. 3. The plate-shaped member of the auxiliary wave-making mechanism is constituted by always applying a predetermined tension to a film member bridged between the adjacent wave-making plates by a tension applying mechanism. The wave generator according to claim 1 or 2, wherein