JP2008199915A - Aquarium and aquarium apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aquarium and an aquarium apparatus comprising an aquarium of double structure for storing an article for various displays in an inner casing in an outer tank, in which fishes are reflected in the inner casing by a method except a mirror, fishes are made to seem larger in number than really they are and fishes are prevented from undergoing stress by making fishes not see their appearances reflected on the inner casing. <P>SOLUTION: The aquarium apparatus 1 is equipped with the aquarium 2 and a base member 3 for placing the aquarium 2. The aquarium 2 is equipped with the inner casing 4, having transparency in an outer tank 5 that has transparency, and a water storage part 6 is formed between the outer tank 5 and the internal casing 4. The internal casing 4 is a cylinder of a polygonal cross-section, equipped with a sidewall surface 42b for reflecting the image of body (for example, fish B1) in water by total reflection. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a water tank and a water tank apparatus.
More specifically, in a double-structured water tank that can store various display articles in the inner casing in the outer tank, the fish can be reflected in the inner casing by a method other than a mirror. The present invention relates to an aquarium and an aquarium device that can show more fish than the number and prevent the fish from being stressed by preventing the fish from being seen in the inner casing.

  Aquariums containing tropical fish and goldfish are popular as interiors in living rooms or hospital waiting rooms and hotel lobby. An aquarium that is commonly used is a box shaped like a plan view, and if it is a tropical fish, it is displayed with a decoration such as coral or seaweed.

In recent years, in order to enhance the display effect, a cylindrical water tank composed of an outer cylinder and an inner cylinder provided inside the outer cylinder has been proposed (Patent Document 1, etc.). Water is put in a water storage part between the outer cylinder and the inner cylinder, and a wave making mechanism for generating a wave traveling in the circumferential direction on the water surface is further provided in the water storage part.
Japanese Patent Laid-Open No. 5-305800 (FIG. 2)

  A conventional general aquarium is a box shape having a simple planar structure, and has no characteristic features for ornamental use.

  Moreover, since the cylindrical water tank described in Patent Document 1 can be observed while walking in the circumferential direction, the display effect seems to be somewhat higher than that of a general box-shaped water tank. Moreover, in order to generate the wave of the circumferential direction on the water surface, the double structure which consists of an inner cylinder and an outer cylinder is employ | adopted, and there exists an advantage that the articles | goods for various displays can be exhibited in an inner cylinder.

  However, since the double structure which provided the inner cylinder inside is employ | adopted, the water quantity of the whole aquarium will decrease correspondingly. For this reason, especially in the case of a small aquarium placed in the living room, the amount of water is small, so the number of ornaments such as tropical fish and corals that can be put in the aquarium is limited, and conversely, the gorgeousness in the aquarium decreases.

  Therefore, the present inventor shows more fish than the actual number even in a small aquarium in a double-structured aquarium that can accommodate various display articles in the inner cylinder. Research and development was advanced from the perspective of whether or not it is possible.

  In the course of the development, the inventor came up with the idea that a mirror should be placed in the inner cylinder and the fish reflected in the mirror, and a prototype was produced. However, if a mirror is inserted into the inner cylinder, there is a problem that the exhibits in the inner cylinder where the mirror is provided are hidden and cannot be seen. Furthermore, it is said that some kinds of tropical fish begin to intimidate their appearance in the mirror, and as a result, the life of the fish is shortened by stress.

(Object of the present invention)
Accordingly, an object of the present invention is to make a fish reflected in the inner casing by a method other than a mirror in a double-structured water tank that can store articles for various displays in the inner casing in the outer tank. Provide a tank and aquarium device that can show more fish than the actual number and prevent the fish from being stressed by preventing the fish from seeing themselves in the inner casing There is to do.

Means taken by the present invention to achieve the above object are as follows.
In addition, although the code | symbol used in drawing is described using the parenthesis in order to help the understanding of description of the effect | action mentioned later, each component is not limited to the thing of drawing description.

  The present invention includes a transparent inner casing (4) in a transparent outer tub (5), and a water storage section (6) is provided between the outer tub (5) and the inner casing (4). The inner casing (4) is a cylindrical body having a polygonal cross section with a side wall surface (42b) on which an image of an object (B1) in water is reflected by total reflection. It is a water tank.

  The present invention includes a transparent inner casing (4) in a transparent outer tub (5), and a water storage section (6) is provided between the outer tub (5) and the inner casing (4). The inner casing (4) is a cylindrical body having a polygonal cross section having a plurality of side wall surfaces (42a, 42b) arranged in the circumferential direction, and one adjacent side wall surface (42a) ) And the other side wall surface (42b) when the other side wall surface (42b) is viewed from the front side of one side wall surface (42a), the water in the water storage section (6) and the inner casing ( 4) A water tank that is set so that the image (C1) of the object (B1) in the water is reflected on the other side wall surface (42b) by total reflection caused by the difference in refractive index from the gas inside It is.

  The present invention includes a transparent inner casing (4) in a transparent outer tub (5), and a water storage section (6) is provided between the outer tub (5) and the inner casing (4). The inner casing (4) is a cylindrical body having a regular hexagonal cross section having a plurality of side wall surfaces (42a, 42b) provided continuously in the circumferential direction, and one adjacent side wall surface (42a). ) And the other side wall surface (42b) of the refractive index of water and the gas in the inner casing (4) when the other side wall surface (42b) is viewed from the front side of the one side wall surface (42a). It is a water tank that is continuously provided so that an image (C1) of an object (B1) in water is reflected on the other side wall surface (42b) by total reflection resulting from the difference.

  The present invention includes a transparent inner casing (4) in a transparent outer tub (5), and a water storage section (6) is provided between the outer tub (5) and the inner casing (4). The outer tub (5) is a regular hexagonal cylindrical body in cross section, and the inner casing (4) has a cross section having a plurality of side wall surfaces (42a, 42b) arranged in the circumferential direction. It is a regular hexagonal cylindrical body, and when the other side wall surface (42b) is viewed from the front side of one adjacent side wall surface (42a), the refractive index of water and the gas in the inner casing (4) It is a water tank in which an image (C1) of an object (B1) in water is reflected on the other side wall surface (42b) by total reflection resulting from the difference.

  The present invention includes a water tank (2) according to any one of the above and a base member (3) on which the water tank (2) is placed, and the base member (3) is an animal or plant in the water tank (2). It is a water tank apparatus provided with the space part which can accommodate the equipment required for breeding.

(Work)
The water tank (1) according to the present invention operates as follows.
That is, water is put into a water storage section (6) between the outer tub (5) and the inner casing (4). The inner casing (4) can accommodate various devices such as a circulation pump necessary for raising fish, and various display items such as flowers and foliage plants.

  The inner casing (4) is a cylindrical body having a polygonal cross section with side wall surfaces (42a, 42b) .The side wall surface (42b) has an underwater fish (B1) or rock (D ), An image of an object (B1) such as coral.

The present invention has the above-described configuration and has the following effects.
(A) According to the aquarium according to the present invention, underwater fish can be reflected in the inner casing by a method other than a mirror due to the phenomenon of total reflection occurring in the inner casing. This makes it possible to show more various ornaments such as fish, corals, seaweeds, etc. than the actual number. Therefore, even if the number of fish and decorations to be placed in the aquarium is limited due to the small volume of the aquarium, it is possible to show more fish and decorations than the actual number. It is possible to effectively produce the glamorous inside.

(B) Also, according to the aquarium according to the present invention, unlike the mirror that is always reflected from any angle, the underwater fish on the upper surface of the side surface of the inner casing is reflected in the inner casing. can not see. Therefore, it is unlikely to start threatening yourself in the mirror, and you can prevent the fish from being stressed by your appearance.

(C) According to the water tank apparatus according to the present invention, the above-described water tank apparatus is provided with a base member on which the above-described water tank is placed, and various devices such as a filtering device and a cooler necessary for fish breeding are placed in the space portion in the base member. Can be accommodated. Therefore, various devices are not randomly exposed and can be stored neatly in the water tank apparatus, and the appearance as an interior is not impaired.

  In the present invention, as described above, the inner casing is provided in the outer tub. The material of the outer tub and the inner casing is not particularly limited as long as it has transparency. Examples of the material of the outer tub and the inner casing include synthetic resins such as glass and acrylic. In addition, since the thing made from glass is hard to be damaged to the surface compared with the thing made from acrylic, it is more preferable.

  Specific examples of the inner casing that is a cylindrical body having a polygonal cross section include a hexagonal cross section (including a regular hexagonal cross section), an octagonal cross section (including a regular hexagonal cross section), and a triangular cross section. And a cylindrical body having a polygonal cross section. In the case of a cylindrical body having a regular polygonal cross section, the inclination angle between one side wall surface and the other side wall surface is determined by the number of side wall surfaces.

  The shape of the outer tub is not particularly limited, and the bottomed cylindrical body having a polygonal cross section (including a regular polygon) as described above, or other shapes such as a circular, elliptical, or quadrangular cross section. It may be a thing.

  In addition to the fish (tropical fish, freshwater fish), shrimp such as bee shrimp and cherry shrimp, turtles, or crocodiles, etc., are particularly limited as long as they can be kept in the aquarium. Not done. Moreover, you may use as not only a living thing but the tank for plant appreciation only of aquatic plants.

  The above specific examples are merely representative and are not particularly limited thereto.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these.

  The invention will be explained in more detail on the basis of an embodiment shown in the drawing.

FIG. 1 thru | or FIG. 9 is a figure for demonstrating one Example of the water tank apparatus based on this invention.
1 is an explanatory perspective view of the aquarium device, FIG. 2 is an explanatory plan view of the aquarium device, FIG. 3 is an explanatory front perspective view showing the usage state of the aquarium device, and FIG. 4 is an enlarged view of the aquarium in FIG. FIG.

  3 and 4, the number of fish B1 and B2 swimming in the aquarium 2 and the actual number of the fish B1 and B2 in the aquarium 2 are shown so that the structure of the aquarium 2 to be described later and the phenomenon of total reflection in this embodiment can be easily understood. The number of the rocks D and corals to be arranged in the water tank 2 when used in is shown in the figure.

5 is a front view reduction explanatory view of the water tank device, FIG. 6 is a right side view explanatory view of FIG. 5, FIG. 7 is a left side explanatory view of FIG. 5, FIG. 8 is a rear view explanatory view of FIG. It is bottom view explanatory drawing of FIG.
Moreover, although the water tank 2 whole is mainly formed with the colorless and transparent plate glass which has transparency, in other drawings other than FIG.3 and FIG.4, the water tank 2 is represented as an opaque body and the plate glass in the outer tank 5 is shown. It is represented by a broken line.

As shown in FIG.1 and FIG.3, the water tank apparatus 1 has the water tank 2 located in an upper side, and the base member 3 which mounts the water tank 2 on an upper surface, and mounts it. As shown in FIG. 2, the aquarium apparatus 1 is formed in a hexagonal column shape having a regular hexagonal shape in plan view. In the present embodiment, the overall size of the water tank apparatus 1 has a maximum width of about 620 mm and a height of about 1300 mm, but is not particularly limited thereto.
Hereinafter, the water tank apparatus 1 will be described in detail in the order of the base member 3 and the water tank 2.

(Base member 3)
As shown in FIG. 1, the pedestal member 3 includes a pedestal member main body 31 formed in a hexagonal column shape, and casters 32 that are rolling means provided on the bottom surface of the pedestal member main body 31. In this embodiment, the base member 3 has a maximum width of about 620 mm and a height of about 900 mm, but is not particularly limited thereto.

  The water tank apparatus 1 can be easily moved by the caster 32 described above. Moreover, when the upper tank 2 is filled with water, the entire tank apparatus 1 becomes a considerable weight, but by providing the casters 32 as in this embodiment, even if a large earthquake occurs, the fall is prevented to the maximum. can do. That is, it is possible to prevent the worst situation that the caster 32 travels back and forth due to the shaking at the time of the earthquake and absorbs the impact received by the aquarium apparatus 1, and as a result, the aquarium apparatus 1 falls. In addition, when it is possible to prevent the water tank apparatus 1 from being overturned by other earthquake countermeasure goods, the caster 32 may be provided with a stopper function.

  The base member main body 31 is mainly formed of a wooden plate material. The base member main body 31 can be formed of, for example, a metal, a synthetic resin, a combination thereof, or other materials.

  The base member main body 31 is hollow inside, and a door 33 that opens and closes in the front and rear direction is provided on the side wall. Various devices (not shown) necessary for the water tank 2 such as a filtering device and a cooler can be accommodated in the base member body 31.

  As shown by broken lines in FIGS. 1 and 2, a regular hexagonal opening 34 (shown by a broken line) is formed on the upper surface of the base member body 31. In a normal use state, the opening 34 is almost entirely closed (except for a circular lid opening 36 at the center to be described later) by a pair of left and right trapezoidal lids 35a and 35b. By having the opening 34, various devices necessary for the water tank 2 can be accommodated from above the base member body 31.

  Although not shown in the drawing, a frame portion that receives the outer edge portions of the placed lid bodies 35a and 35b is provided on the inner edge portion of the opening 34. Each of the lids 35a and 35b is a plate body whose outer shape is formed in a trapezoidal shape in plan view as described above, and is arranged facing each other so that the long side portion side coincides with each other. A regular hexagon covering the whole is formed.

  Further, a semicircular arc-shaped notch (reference number omitted) constituting the lid opening 36 is provided at the center of the long side of each lid 35a, 35b. When the pair of lids 35a and 35b are arranged to face each other, a lid opening 36 is formed between the notches.

  Further, as will be described later (see also FIG. 3), a display article such as a vase (not shown) in which a flower A is placed is accommodated inside the base member main body 31, and the flower A is moved upward from the lid opening 36. To the inner casing 4 side of the water tank 2 to be described later.

(Water tank 2)
As shown in FIG. 1, the water tank 2 includes an outer tank 5 having transparency and an inner casing 4 provided in the outer tank 5 and having transparency. The place to put water when using the water tank 2 is a water storage section 6 which is a space between the outer side of the inner casing 4 and the inner side of the outer tank 5. The inner casing 4 can store articles. Examples of the articles accommodated in the inner casing 4 include the above-mentioned foliage plants such as flowers, cycads, and cacti, other various flowers, and other ornaments such as a Christmas tree at Christmas time. In particular, it is not limited to these.

  The outer tub 5 is a concave container formed in a hexagonal prism shape having a regular hexagonal shape in plan view. The outer tub 5 is formed by laminating a plurality of transparent glass plates. That is, the outer tub 5 includes a plate glass bottom plate 51 having a regular hexagonal shape, and a square or rectangular plate glass side wall plate 52 provided in a state of standing upright on six sides of the bottom plate 51 (in total) 6).

  In this embodiment, the length of one side of the outer edge portion of the bottom plate 51 is about 300 mm. The side wall plate 52 has a width of about 300 mm and a height of about 400 mm. This size is appropriately set in consideration of the place where the water tank apparatus 1 is installed, and is not particularly limited to this size.

  As shown in FIG. 1, a circular hole 510 (shown by a broken line) is formed at the center of the bottom plate 51. Then, the inner casing 4 that is a regular hexagonal cylindrical body in a plan view is erected and fixed so as to close (cover) the hole 510 from above.

  The inner casing 4 is formed by laminating a plurality of rectangular glass side wall plates 42 (total of six) in the circumferential direction. The side wall plate 42 has a width of about 100 mm and a height of about 394 mm, but is not particularly limited thereto. The height of the side wall plate 42 of the inner casing 4 is about 6 mm lower than the height of the side wall plate of the outer tub 5, and an outer tub lid 71, 72 described later is provided between the inner casing 4 and the outer tub 5. The lids 71 and 72 are designed to be kept in a horizontal state when placed on the head.

  Furthermore, by configuring the inner casing 4 with a cylindrical body having a regular hexagonal cross section, as shown in FIG. 4, the inclination angle between the one side wall surface 42 a and the other side wall surface 42 b of the inner casing 4 is one side. When viewing the other side wall surface 42b from the front side of the side wall surface 42a, preferably from the front side of the side wall surface 42a, an image of an object in water is reflected on the other side wall surface 42b.

  That is, as shown in FIG. 4, which is a state where water and fish are put in the aquarium 2, the front position of one of the six side walls 42a constituting the outer tub 5 (center front in FIG. 4). Stand and see the inner casing 4 through this side wall surface 42a. Then, the inside flower A (shown by a solid line) can be seen through the front side wall surface 42a of the inner casing 4, but the flower A (shown by a broken line) can be seen from the two side wall surfaces 42b and 42b located on the front side. Without seeing through, an image of an object in the water (in FIG. 4, an image C1 of a fish B1 swimming in the water and an image C2 of a fish B2) appears to be reflected. As a result, more fish can be shown than the actual number swimming in the water. Details of this operation will be described later.

  In FIG. 1, two types of lids 71 and 72 that close the upper surface of the outer tub 5 are made of plate glass and formed in a trapezoidal shape in plan view. The lids 71 and 72 are detachable on the upper surface of the water tank 2 so as to close the space between the inner casing 4 and the outer tank 5 (except above the water storage section 6 and inside the upper surface of the inner casing 4). It is attached.

  Specifically, the required number of lids 71 and 72 (six or six in this embodiment) is provided, and two of the six lids 71 and 72 (hereinafter referred to as “small lids 72”). ) Is shorter than the remaining four pieces, and the length between the opposite sides (the height of the trapezoid) is shorter and the area is smaller than that of the remaining four. As will be described later, a slight gap S is provided between the small lid 72 and the inner casing 4, and a circulation pump or the like (not shown) led out from the inner casing 4 is inserted into the gap S from above the small lid 72. It is for inserting into the water storage part 6. Note that the size of the gap S is not particularly limited, and in order to omit the gap S, the lid bodies 71 and 72 can all be formed in the same size.

  Each of the four lid bodies 71 (hereinafter referred to as “large lid body 71”) having a larger area is placed on the upper side of the side wall plate 42 of the inner casing 4, and the corner on the base end side is the outer tub. 5 is mounted on a lid body receiving portion 53 (see FIG. 4) attached to 5. The lid receiving parts 53 are made of metal and have an L-shaped cross section, and are respectively attached to the upper end part of the inner corner part of the outer tub 5 (six places in total). The lid receiving portion 53 is formed in a mountain shape ("<" shape) in plan view in accordance with the angle (about 120 degrees) of the inner corner portion of the outer tub 5. A corner portion on the base side of the lid body 71 is placed on the side of the lid body receiving portion 53 that is bent in an L-shaped cross section.

  As shown in FIGS. 1 and 2, the two small lid bodies 72 having the smaller areas are arranged in pairs so as to face each other. The small lid body 72 is mounted on the same lid body receiving portion 53 at the corner portion on the base side, and the other side lids attached to the adjacent large lid bodies 71 and 71 on the side sides that are obliquely cut. It is placed on the body receiver 54. As shown in FIG. 4, the lid receiving portion 54 is formed by bending a thin metal plate in two stages in an L shape. Then, one side in the width direction of the lid receiving portion 54 is fixed to the large lid 71, and the small lid 72 is placed on the side bent in the L-shaped cross section on the other side.

  Note that the above-described two types of lid receiving parts 53 and 54 can also be formed of a plastic other than a metal material or other materials. Moreover, a part or all of the opening (reference number omitted) above the inner casing 4 can be closed with another lid so that dust and dust can be prevented from entering as much as possible.

(Work)
The water tank apparatus 1 according to the present embodiment operates as follows.

  Various devices such as a filtration device and a cooler necessary for breeding fish are accommodated in a base member 3 below the water tank 2 shown in FIG. As a result, various devices are not randomly exposed and can be accommodated neatly in the aquarium apparatus 1, and the appearance as an interior is not impaired.

  First, in order to put water into the water tank 2, the lids 71 and 72 at required positions on the upper surface of the outer tank 5 are removed. And if water is put into the water storage part 6 between the inner casing 4 and the outer tank 5, the cover bodies 71 and 72 will be returned like the original.

  Although not shown in the drawing, pipes for the circulation pump, heaters, thermostats (hereinafter referred to as “pipes”) (hereinafter referred to as “pipes”) are drawn from the various devices accommodated in the base member 3, and the water in the water storage section 6 is drawn. Install in. More specifically, pipes and the like connected to various devices are drawn upward from the lid opening 36 on the upper surface of the base member 3, and further passed upward through the inner casing 4, so that the water reservoir 6 Insert it inside. The insertion location is preferably from the gap S beside the small lid 72. A pipe or the like can be fixed to the outer glass surface of the inner casing 4 by using a fixing means such as a suction cup. The lighting device can be fixed to the inner casing 4.

  As shown in FIG. 4, in the inner casing 4, various articles such as a vase with flowers A can be placed in addition to the pipes described above. Although FIG. 4 shows a case where a fresh flower A is added as an example, the present invention is not particularly limited to this. However, an article having a high display effect is preferable. For example, when a vase with flowers A is accommodated, a mounting table (not shown) for mounting the vase can be provided inside the base member 3. Further, the petals may be arranged above the inner casing 4 so as to be alive.

  Further, for example, when accommodating a houseplant that is tall and has a relatively large base pot, such as a cycad, the pot is stored in the base member 3 under the water tank 2, the trunk is passed through the inner casing 4, and branches and leaves are further stored. This portion may be pulled out from the inner casing 4. If a heavy object such as a bowl is accommodated in the base member 3, there is an advantage that the stability of the entire water tank apparatus 1 is further improved. Furthermore, when keeping freshwater fish, the water in the aquarium 2 can be used as water for irrigation when growing a houseplant. In addition, for example, it is possible to irrigate the foliage plant from a pipe for a circulation pump.

  As described above, in the water tank apparatus 1 according to the present embodiment, articles suitable for various displays such as the flower A can be accommodated in the inner casing 4 in the outer tank 5. Thereby, as shown in FIG. 4, for example, it is possible to provide a novel display that is not normally possible in the natural world, such as a tropical fish elegantly swimming around a fresh flower A that is a land plant.

  In addition, as shown in FIG. 4, in the aquarium 2, in addition to the bottom sand E and the rock D, various ornaments such as coral and seaweed can be put.

FIG. 10 is a diagram for explaining a phenomenon of total reflection in which fish swimming in water is reflected on the side wall surface of the inner casing. In FIG. 10, reference numeral 4 indicates an inner casing, and reference numeral 5 indicates an outer tub 5.
Please refer to FIG. 4 and FIG.

  As described above, the inner casing 4 is a cylindrical body having a regular hexagonal cross section, whereby the adjacent one of the side wall surfaces 42a and the other side wall surface 42b of the inner casing 4 is viewed from the front side of the one side wall surface 42a. When the other side wall surface 42b is viewed, an image of an object in water is continuously provided so as to be reflected on the other side wall surface 42b.

  That is, the inner casing 4 is viewed through the side wall surface 42a, standing in front of one of the six side walls 42a constituting the outer tub 5. Then, the image C1 of the fish B1 swimming underwater appears on the side wall surface 42b located next to the side wall surface 42a located on the front surface among the side wall surfaces 42a constituting the inner casing 4 shown in FIG. This is considered to be caused by a phenomenon of so-called “total reflection” caused by a difference in refractive index between water and gas (air) in the inner casing 4.

  That is, when the light travels from the water to the air in the inner casing 4 (or the plate glass that is the side wall portion), if the incident angle θ shown in FIG. 10 becomes larger than a certain magnitude, all the light is reflected. The image C1 of the object (fish B1) in the area appears. In the present embodiment, the incident angle θ represents an angle formed by the broken line L1 perpendicular to the surface of the side wall surface 42b located in the right front in FIG. 10 and the direction of the viewer's line of sight L2.

  Due to this total reflection phenomenon, as shown in FIG. 4, more fish can be shown than the actual number swimming in the water. Also, the rock D placed on the bottom sand E, or the coral and seaweed decorations placed in the outer tub 1 can be reflected (FIG. 4 shows the state where the image D1 of the rock D is reflected. ) This makes it possible to show more fish and decorations than the actual number even if the number of fish and various decorations to be placed in the tank 2 is limited due to the small volume of the tank 2. As a result, the gorgeousness in the water tank 2 can be effectively produced.

  Further, when this total reflection phenomenon occurs, the flowers in the inner casing 4 cannot be seen through the side wall surface 42b on the side in FIG. That is, as shown in FIG. 4, although the flower A (indicated by a solid line) in the inner casing 4 is visible from the front side wall surface 42a where total reflection does not occur, the side wall surfaces on both sides where total reflection occurs. The flower A (indicated by a broken line) is not visible from 42b and 42b. However, when moving to the front of the side wall surface 42b where total reflection occurs and standing in front of it, the flower A can now be seen from the side wall surface 42b, and conversely, the total reflection is reflected on the side wall surface 42a that has been seen previously. A phenomenon occurs, and the flower A cannot be seen from the surface. As described above, a strange phenomenon occurs in which the appearance of the flower A changes depending on the location of the inner casing 4, and the visual fun as an interior is high.

  Further, although not shown in the figure, when the inner casing 4 is viewed from above the lids 71 and 72 on the upper surface of the outer tub 5, it is in a state of looking down from the lower oblique direction. Phenomenon of total reflection occurs on the side wall plates 42a and 42b. As a result, a more unusual phenomenon occurs, such as bottom sand and fish appearing in the entire visible inner casing 4.

FIG. 11 is an explanatory diagram showing a state when the inner casing is viewed from a fish located in front of the side wall.
Furthermore, the phenomenon of total reflection does not occur unless the incident angle θ is sufficiently large as described above (that is, an underwater object is not reflected unless the side wall surface 42b shown in FIG. 10 is viewed from an oblique direction). . Therefore, as shown in FIG. 11, even when the fish B3 in front of the side wall surface 42b sees the inner casing 4, the phenomenon of total reflection does not occur and the image C3 is not reflected. The flowers in the inner casing 4 are only seen through the side wall surface 42b made of plate glass.

  In this way, unlike the mirror that always appears from any angle, the fish B3 cannot see herself in the inner casing 4, so she begins to intimidate herself in the mirror. This is unlikely to occur, and it is thought that fish are less susceptible to stress depending on their appearance.

  Note that the terms and expressions used in this specification are merely explanatory and are not restrictive, and do not exclude terms and expressions equivalent to the above terms and expressions. The present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the technical idea.

  Further, in the claims, the reference numerals used in the drawings are described in parentheses in order to facilitate understanding of the contents of the claims, but the claims are not limited to those described in the drawings. Absent.

Explanatory drawing which shows one Example of a water tank apparatus. Plan view explanatory drawing of an aquarium apparatus. Front view perspective explanation which shows the use condition of an aquarium apparatus. The partially expanded explanatory view which expanded and showed the water tank in FIG. Front view reduction explanatory drawing of an aquarium apparatus. Right side explanatory drawing of FIG. Illustration on the left side of FIG. 5 is a rear view explanatory diagram 2 is a bottom view explanatory diagram The figure for demonstrating the phenomenon of the total reflection in which the fish which swims in water is reflected on the side wall surface of an inner casing. Explanatory drawing which shows the state at the time of seeing an inner casing from the fish located in the front of a side wall part

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water tank apparatus 2 Water tank 3 Base member 4 Inner casing 5 Outer tank 6 Water storage part 31 Base member main body 32 Caster 33 Door 34 Opening part 35a, 35b Cover body 36 Cover body opening part 42 Side wall plate 42a, 42b Side wall surface 51 Bottom plate 52 Side wall Plate 53 Lid receiving part 54 Lid receiving part 71 Large lid 72 Small lid A Fresh flower B1, B2 Fish C1, C2, C3 Fish image S Gap

Claims (5)

A water tank provided with a transparent inner casing (4) in a transparent outer tank (5), and a water reservoir (6) between the outer tank (5) and the inner casing (4) Because
The inner casing (4) is a cylindrical body having a polygonal cross section with a side wall surface (42b) on which an image of an object (B1) in water is reflected by total reflection.
Aquarium. A water tank provided with a transparent inner casing (4) in a transparent outer tank (5), and a water reservoir (6) between the outer tank (5) and the inner casing (4) Because
The inner casing (4) is a cylindrical body with a polygonal cross section having a plurality of side wall surfaces (42a, 42b) arranged in the circumferential direction, and one side wall surface (42a) and the other side wall surface (42b) ) Is inclined when the other side wall surface (42b) is viewed from the front side of one side wall surface (42a) and the water in the water storage section (6) and the gas in the inner casing (4) are refracted. It is set so that the image (C1) of the object (B1) underwater is reflected on the other side wall surface (42b) by total reflection resulting from the difference in rate.
Aquarium. A water tank provided with a transparent inner casing (4) in a transparent outer tank (5), and a water reservoir (6) between the outer tank (5) and the inner casing (4) Because
The inner casing (4) is a cylindrical body having a regular hexagonal cross section having a plurality of side wall surfaces (42a, 42b) arranged in the circumferential direction, and is adjacent to one side wall surface (42a) and the other side wall surface (42b). ), When the other side wall surface (42b) is viewed from the front side of one side wall surface (42a), it is submerged in water due to total reflection caused by the difference in refractive index between water and the gas in the inner casing (4). In order to project an image (C1) of an object (B1) on the other side wall surface (42b),
Aquarium. A water tank provided with a transparent inner casing (4) in a transparent outer tank (5), and a water reservoir (6) between the outer tank (5) and the inner casing (4) Because
The outer tank (5) is a cylindrical body having a regular hexagonal cross section,
The inner casing (4) is a tubular body having a regular hexagonal cross section having a plurality of side wall surfaces (42a, 42b) provided continuously in the circumferential direction, from the front side to the other side of one side wall surface (42a) adjacent to each other. When looking at the wall (42b), the image (C1) of the object (B1) in the water due to the total reflection caused by the difference in refractive index between water and the gas in the inner casing (4) causes the other side wall surface (42b) )
Aquarium. A water tank (2) according to any one of claims 1 to 4 and a base member (3) on which the water tank (2) is placed, wherein the base member (3) is for an animal or plant in the water tank (2). It has a space that can accommodate equipment necessary for breeding,
Aquarium equipment.

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