JPH0928600A - Wave generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend an area capable of generating uniform waves. SOLUTION: Rollers 4 having vertical shafts are rotatably supported by each end part of wave creating plates 1c of two wave creating machines 1 mutually adjacent and opposed with a prescribed space, which are arranged on a corner angle part A. A membrane member 5 consisting of Teflon (R) plate or hard rubber is laid between the pair of rollers 4. Each end part of the membrane member 5 is fixed to the side walls 2a, 2b of a water tank 2. Spring members 6 constituting tension imparting mechanisms, respectively, are interposed between each end part 5a, 5b fixed to the sidewall 2a, 2b of the membrane member 5 and the rollers 4. Thus, a plate member having a prescribed rigidity is formed by the membrane member 5c situated between the rollers 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wave generator that generates waves, and more particularly to a wave generator that can generate waves of uniform magnitude in multiple directions.

[0002]

2. Description of the Related Art A conventional wave generator is constructed by arranging a plurality of wave-making machines in a row along a predetermined side wall in a box-shaped water tank for generating waves. Each wave machine
For example, a plurality of wave-making plates each 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.

Then, each wave-making plate is independently reciprocated to generate a wave traveling in a desired oblique direction. At this time, if a wave is generated only by the wave-making machines arranged in a horizontal row as described above, the wave to be generated is disturbed by, for example, a reflected wave from the wall surface of the water tank on the side opposite to the wave generation side. , The area where the waves have a uniform size becomes narrow.
Therefore, conventionally, for the purpose of absorbing the above-mentioned reflected waves and preventing the generation of reflected waves that directly face the required waves, as shown in FIG. 4 and FIG. The wave generating device is configured by arranging in a L shape or a U shape in a top view along the side wall in the water tank 2, thereby widening the region where the waves have a uniform size.

Here, when a plurality of wave-making machines 1 are arranged along the L-shape in a top view as described above, the adjacent wave-making plates 1c are formed.
The wave maker 1 cannot be installed in a portion where the reciprocating directions of the two are different from each other, that is, in the corner portion A in the water tank 2. On the other hand, conventionally, as shown in FIG. 6 (a), nothing is installed in the corner portion A, or as shown in FIG. 6 (b), the sliding plate 20 is installed and stopped. There was a wall for water.

[0005]

However, in the conventional wave generating device as described above, a wave generating device for generating a desired wave is generated at a corner (the corner A) of the array of the wave making machine 1. Since the wave machine 1 is not provided, when a wave traveling in an oblique direction is generated as described above, for example, a portion where the wave does not occur is formed in a region B shown by a chain line in FIG.

This causes a problem of narrowing the generation region of waves of uniform size. Further, in the wave generator shown in FIG. 6 (a), from the end of the wave generator 1 in which the above-mentioned corner portion A is arranged, and in the wave generator shown in FIG. 6 (b) from the sliding plate 20, Diffracted waves are generated respectively, and there are parts where unexpectedly large waves are generated. This also narrows the generation region of waves of uniform size.

The present invention has been made in view of the above problems, and an object thereof is to widen a region where uniform waves can be generated.

[0008]

In order to achieve the above-mentioned object, a wave generator according to a first aspect of the present invention is a wave-making device which causes a wave by reciprocating a plurality of wave-making plates. In a wave generator configured by arranging a plurality of machines, the two wave machines, which are adjacent to each other with a space therebetween, are installed between the wave-making plates having different directions of reciprocating movement and interlocked with the movement of the wave-making plate. Then, an auxiliary wave-making mechanism having a plate-shaped member capable of reciprocating is provided.

Further, in the invention described in claim 2, in addition to the structure described in claim 1, a pair of wave-making plates on which the plate-like members are installed are reciprocally moved in synchronization with each other in the same phase. Is characterized by. Moreover, the invention described in claim 3 is different from the configuration described in claim 1 or 2 in that
The plate-like member of the auxiliary wave-making mechanism is characterized by being configured to constantly apply a predetermined tension to the film member bridged between the adjacent wave-making plates by the tension-applying mechanism.

[0010]

First, the operation of the invention described in claim 1 will be described. When the pair of wave-making plates on which the plate-like member is installed reciprocates, the plate-like member of the auxiliary wave-making mechanism also reciprocates in association with the movement of the wave-making plate, and the reciprocating movement of the plate-like member occurs. Waves can be generated toward the destination. As a result, a mechanism capable of generating waves is provided in the spaces between the wave-making plates whose reciprocating directions are different from each other.

At this time, if the invention as set forth in claim 2 is adopted, the pair of wave-making plates on which the plate-like members are installed reciprocally move in phase and in synchronism with each other, so that the respective wave-making plates in the plate-like member are moved. The parts connected to are synchronized with each other and reciprocally move in the same phase. As a result, the plate-shaped member provided on both wave-making plates reciprocates without swinging in the direction corresponding to the plate thickness, that is, in the intermediate direction of the reciprocating direction of the wave-making plates. Like As a result, the auxiliary wave-making mechanism can reliably generate a wave traveling in the direction corresponding to the plate thickness of the plate-shaped member.

Next, the operation of the invention described in claim 3 will be described. The two wave-making plates on which the plate-shaped member is installed have reciprocating directions different from each other, so that the distance between the two wave-making plates approaches and separates according to the reciprocating movement. In view of this, in the invention of claim 3, a film member is used as a member to be bridged between both wave-making plates, and a predetermined tension is constantly applied to the film member by a tension applying mechanism. The members are always tense. As a result, the film member portion located between the two wave-making plates has a plate shape having a predetermined rigidity capable of generating waves, and constitutes a plate-shaped member.

Further, the plate-shaped member made of the strained film member can follow the change in the distance between the two corrugated plates due to its flexibility and the action of the tension applying mechanism. As a result,
Even if the distance between the two wave-making plates changes, the film member in a state of being always in tension moves back and forth to generate a wave.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. First, the structure will be described. As shown in FIG. 4, a plurality of wave-making machines 1 are arranged in a U-shape in a top view along the side wall in the water tank 2 as in the conventional case. Each wave maker 1 includes a wave maker main body 1a fixed along the side wall of the water tank 2, a plurality of pistons 1b horizontally projecting from the wave maker main body 1a, and a tip portion of each piston 1b. Each of the plurality of corrugated plates 1c is fixed. The piston 1b and the corrugated plate 1c are arranged in a row in the lateral direction along the side wall of the water tank 2, and can be individually reciprocated in the same direction. This makes it possible to generate a wave traveling in a predetermined oblique direction.

At this time, the two wave-making machines 1 arranged adjacent to each other at the corner A of the water tank 2 and adjacent to each other have their wave-making plates 1c.
Since the reciprocating movement directions of the
It is not possible to install another wave generator in the. In the present embodiment, the auxiliary wave-making mechanism 3 is provided between the 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.

Rollers 4 whose axes are oriented in the vertical direction are rotatably supported at the respective ends of the wave-making plates 1c which are adjacent to each other and face each other at a predetermined interval. ing. A film member 5 made of a Teflon plate, hard rubber or the like is bridged 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 the one roller 4a.
By winding around the one roller 4a, the extending direction is changed, and the roller 4a extends toward the other roller 4b. Further, the membrane member 5 is wound around the other roller 4b and further changes its extending direction to extend to another side wall 2b of the water tank 2, and the other end 5b is fixed to the side wall 2a of the water tank 2. .

Further, a spring member 6 constituting a tension applying mechanism is inserted between each end 5a, 5b fixed to the side wall 2a of the film member 5 and the roller 4. The pair of spring members 6 are the rollers 4 of the film member 5.
By constantly pulling the side portions 5c toward the side walls 2a and 2b of the water tank 2, respectively, the membrane member portion 5 located between the rollers 4 is pulled.
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 constitutes a plate-like member having a predetermined rigidity when tensioned. Next, the auxiliary wave-making mechanism 3
The operation and the like of the wave generator including the above 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 film member 5 is installed are controlled to reciprocate in the same phase and in synchronization. Then, when both the wave-making plates 1c on which the above-mentioned film member 5 is installed move in the direction away from each wave-making machine main body 1a synchronously from the position of the solid line to the position of the alternate long and short dash line in FIG. (Hereinafter, the movement toward the center side of the water tank 2 is referred to as the forward movement, and the movement in the opposite direction is referred to as the backward movement), and the pair of rollers 4 provided on each of the wave-making plates 1c also moves forward, whereby 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 according to the forward movement, but the respective end portions of the film members 5c located between the rollers 4 are pulled by the spring members 6, respectively. The film member 5c between the rollers 4 is prevented from slackening by sliding on the film 4, and tension enough to push water in the forward direction is applied to the film member portion 5c located between the rollers 4.

As a result, the film member 5 between the rollers 4 is
It will move forward while maintaining the flat state. In addition, since both wave-making plates 1c on which the film member 5 is installed are advanced in the same phase in synchronization with each other, the film member 5 between the rollers 4 does not rotate about a predetermined vertical axis and the film thickness is increased. Move forward in the direction. Continuously, both corrugated plates 1c on which the film member 5 is installed are
In FIG. 2, when moving backward in synchronization from the position indicated by the one-dot chain line to the position indicated by the solid line, the pair of rollers 4 provided on each of the wave-making plates 1c also retracts, whereby a pair of rollers 4 The film member 5c located between the rollers 4 also retreats in the film thickness direction. At this time, although the rollers 4 are separated from each other in accordance with the retreat, the film member 5 slides on the rollers 4 so that the distance between the rollers 4 depends on the distance between the rollers 4. The film member 5c is arranged, and a predetermined tension is applied to the film member 5c between the rollers 4 by the spring member 6.
As a result, the film member 5 between the rollers 4 retracts while maintaining the flat plate shape.

As described above, when the pair of wave-making plates 1c repeatedly move forward and backward in synchronism with each other, the movement is interlocked,
The film member 5 between the rollers 4 also has a flat plate shape, in the film thickness direction,
That is, the reciprocating movement is repeated in the intermediate direction of the reciprocating movement direction of both wave-making plates 1c, and the wave is generated in the intermediate direction of the reciprocating movement direction of the both wave-making plates 1c (oblique direction in FIG. 2). It will be possible.

Here, in the above description, the case where both the corrugated plates 1c on which the film member 5 is installed is reciprocally moved in synchronism with the same stroke amount is explained.
For example, when the stroke amounts and stroke positions of the two wave-making plates 1c are made different from each other, the reciprocating movement of the film member 5c is changed by reciprocating in the front-rear direction in synchronization with each other. The traveling direction of the wave generated by the film member 5c can be changed.

Further, in the above description, both wave-making plates 1c on which the film member 5 is installed are reciprocally moved in synchronism with each other, so that the film member 5c forming the plate-like member is not rotated but in the film thickness direction. Although the reciprocating movement of the wave-making plate 1c on which the film member 5 is installed is deviated, the film member 5c positioned between the rollers 4 is moved at a predetermined angle in the left-right direction around the predetermined position. You may make it reciprocate while rotating only.

As described above, the wave traveling in the desired direction can be generated from the corner portion A of the water tank 2 in which the wave generator 1 cannot be installed, that is, the wave cannot be generated conventionally. As a result, it is possible to generate a wave even in a portion where a wave has not been generated conventionally (a portion indicated by B in FIG. 7), which is caused by not generating a target wave from the corner portion A. Further, by generating the target wave from the corner portion A, it becomes possible to suppress the diffracted wave generated from the vicinity of the position of the corner portion A as in the conventional case. As a result, the area in which uniform waves 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 is not necessary to have its own power, and a simple mechanism is used. Can generate waves. In the wave generator of the above-described embodiment, the side wall 2 in the water tank 2 is
Although an example in which the wave former 1 is arranged in a U shape in a top view along a and 2b is shown, the wave former 1 may be arranged in an L shape in a top view. In short, the present embodiment can be applied to the case where the wave making machine 1 is arranged so that the reciprocating movement directions of the adjacent wave making plates 1c are different.

For example, not only the arrangement in which the reciprocating directions of the adjacent wave-making plates 1c make a right angle but also the arrangement in an obtuse angle, such as the arrangement in a V shape in a top view, is applicable. is there. Furthermore, the wave-making plate 1c on which the film member 5 is installed
However, the present embodiment can be applied even if the arrangement is such that it moves away as it moves forward and approaches as it moves backward.

Further, in the above-mentioned embodiment, the spring members 6 are inserted on both end sides of the film member 5, but it suffices that a predetermined tension can always be applied to the film member 5 between the rollers 4, so that one end thereof. 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 one including the film member 5 and the tension applying mechanism as described above. For example, the auxiliary wave-making mechanism 3 as shown in FIG. 3 may be used. This auxiliary wave-making mechanism 3 has rollers 10 whose axes are oriented vertically with respect to each end of a pair of wave-making plates 1c which are arranged at a predetermined interval and have mutually different reciprocating movement directions. Support the shaft. Then, the flat plate member 11 forming the plate member is brought into contact with the pair of rollers 10 from the side wall side of the water tank, and the flat plate member 11 is pressed toward the roller 4 by the biasing means 12 (spring). (Members and the like) are provided.

In this auxiliary wave-making mechanism 3, when each wave-making plate 1c advances from the wave-making machine body 1a, the flat plate member 11 also advances in the plate thickness direction by the urging force of the urging means 12. Moreover, when each wave-making plate 1c retracts, the flat plate member 11 is retracted by being pushed by the wave-making plate 1c. In this way, the flat plate member 11 can repeat the reciprocating movement in the plate thickness direction in association with the movement of the corrugated plate 1c to generate a wave that advances in the plate thickness direction.

As a result, the same action and effect as the auxiliary wave-making mechanism 3 composed of the film member 5 and the tension imparting mechanism described above are exhibited.

[0030]

As described above, according to the wave generator of the present invention, it is difficult to install the wave making machine in the space between the wave making machines in which the reciprocating movements of the adjacent wave making plates are different from each other. By providing the auxiliary wave-making mechanism of the invention, it is possible to generate a wave traveling in a desired direction even from a position where the wave-making machine cannot be installed.

Moreover, the above-mentioned 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 in a top view, it is possible to generate a wave in a desired direction even from a corner of the arrangement of the wave maker. This has the effect of suppressing the influence of the part that is formed and increasing the area in which a uniform wave can be generated, compared to the conventional case.

At this time, if the invention described in claim 2 is adopted, the pair of wave-making plates for arranging the plate-like members move in synchronism and reciprocally in the same phase, so that the plate of the auxiliary wave-making mechanism is moved. The plate-shaped member can always reciprocate in the direction corresponding to the plate thickness without rotating. As a result, there is an effect that the wave traveling in the plate thickness direction can be surely generated.

Further, since the pair of wave-making plates bridging the plate-like members of the auxiliary wave-making mechanism have different reciprocating directions, 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 even if the distance between the corrugated plates changes due to the reciprocal movement, a wave can be reliably generated between the corrugated plates.

[Brief description of 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 the 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 wave generator 1 is arranged in a U-shape in a top view.

FIG. 5 is a diagram showing an example in which the wave generator 1 is arranged in an L shape in a top view.

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 in which a wave is not generated in a conventional wave generator.

[Explanation of symbols]

 A Corner portion 1 Wave generator 1c Wave plate 2 Water tank 3 Auxiliary wave forming mechanism 4 Roller 5 Membrane member 6 Spring member (tensioning mechanism)

Claims (3)

[Claims] 1. A wave generator configured by arranging a plurality of wave-making machines, which generate waves by reciprocating a plurality of wave-making plates, respectively. A wave generator, comprising: an auxiliary wave-making mechanism that is provided between wave-making plates having different reciprocating directions and has a plate-like member that can reciprocate in association with the movement of the wave-making plates. 2. The wave generator according to claim 1, wherein a pair of wave-making plates on which the plate-shaped members are installed are reciprocally moved in the same phase in synchronization with each other. 3. The plate-shaped member of the auxiliary wave-making mechanism is constituted by constantly applying a predetermined tension by a tension-applying mechanism to the film member bridged between the adjacent wave-making plates. The wave generator according to claim 1 or 2.