JP7190553B1 - top cover for water tank - Google Patents

Abstract

An object of the present invention is to provide an upper cover for a water tank that can reliably prevent splashing of water from the inside of the water tank and jumping out of growing organisms. A water tank upper cover (1) for covering an upper opening (5H) of a water tank (5), comprising a substantially box-shaped cover body (2) opening downward and a substantially box-shaped sub-container (4) opening upward. The cover body 2 has an upper wall 11 facing the upper opening 5H from above, and extends downward from the outer peripheral edge of the upper wall 11. A window hole 13 in which the sub-container 4 can be embedded is provided in a substantially central portion of the upper wall 11 . and a peripheral frame 32 extending outwardly from the container body 31 and capable of engaging and holding the outer peripheral surface of the window hole 13. , and a water passage hole 36 through which water in the water tank 5 can flow is provided at least within the submerged range of the container body 31 . [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to an aquarium upper cover for covering an upper opening of an aquarium for cultivating ornamental fish and aquatic plants.

In response to an increase in the gardening population, a combination of a tank used for breeding ornamental fish and growing aquatic plants and a planter container capable of cultivating foliage plants has been proposed (for example, Patent Documents 1 and 2).

The water tank has a box-shaped planter container that opens upward. In addition, the planter container is provided with a flange (protrusion) on its peripheral surface, and by engaging the flange with the upper edge of the water tank, it is installed in the water tank in a dropped state.

JP-A-10-98976 Jitsuzen Sho 62-64275

By the way, in an aquarium for growing ornamental fish and aquatic plants, it is desirable to introduce light into the aquarium from above so that the inside of the aquarium can be viewed as clearly as possible. Therefore, even in an aquarium equipped with a planter container as described above, a predetermined gap is defined between the upper edge of the aquarium and the planter container, and light can be introduced into the aquarium through the gap. can.

However, if a gap is provided between the water tank and the planter container, there is a risk that the water will splash outside the water tank or that the growing organisms will jump out.

In addition, conventional aquarium tanks for cultivating ornamental fish and aquatic plants generally have a cover plate such as a glass plate or an acrylic plate placed on the top of the tank in order to prevent water from splashing out of the tank and the growing organisms from jumping out. However, in the case of a water tank equipped with the planter container, an existing cover plate cannot be used. Moreover, the cover plate as described above is likely to be displaced, and there is a possibility that the gap cannot be reliably covered.

The present invention has been made in view of the above problems, and even when a planter function is used in combination with an aquarium for cultivating ornamental fish and aquatic plants, it is possible to prevent splashing of water outside the aquarium and jumping out of the growing organisms. To provide an upper cover for a water tank which can surely prevent this.

In order to solve the above problems, the aquarium top cover of the present invention has the following technical measures.

The water tank upper cover of the present invention covers an upper opening of the water tank, and comprises a substantially box-shaped cover body opening downward and a substantially box-shaped sub-container opening upward. The cover body includes an upper wall facing the upper opening from above, and a lower edge extending downward from the outer peripheral edge of the upper wall so that the lower edge contacts the entire circumference of the upper edge of the water tank. a side wall that is supported in contact with the cover body, a window hole in which the sub-container can be embedded is provided in a substantially central portion of the upper wall, and a lower edge portion of the side wall protrudes toward the inside of the cover main body. An inner flange is provided, and a fitting frame portion projecting downward from the cover body is provided on the inner edge of the inner flange. a container body in which a predetermined range above the portion is immersed to a position below the lower edge of the side wall; a peripheral frame extending outward from the container body and capable of being engaged and held by the outer peripheral surface portion of the window hole; and a water passage hole through which water in the water tank can flow is provided in at least the submerged range of the container body.

Preferably, a transparent window plate is provided so that the window plate can be attached to the peripheral portion of the window hole in place of the sub-container.

Preferably, the cover main body is provided with an auxiliary hole through which a power cord or pipes can be inserted in the side wall on the rear side.

Preferably, the cover main body is provided with a fitting frame at the lower edge of the side wall to be fitted inside the upper edge of the water tank, and the outer surface of the fitting frame is provided with the water tank and the cover main body. A packing capable of preventing leakage of water from between is provided.

According to the aquarium top cover of the present invention, a foliage plant can be cultivated using an existing aquarium. Moreover, even in that case, it is possible to reliably prevent water from splashing out of the water tank and the growing organisms from jumping out.

It is a perspective view which shows the installation state of the upper cover for water tanks of 1st Embodiment. 1 is a perspective view of a water tank upper cover according to a first embodiment; FIG. It is a top view of the upper cover for water tanks of 1st Embodiment. It is a rear view of the upper cover for water tank of 1st Embodiment. It is a side view longitudinal section schematic diagram of the upper cover for water tanks of a 1st embodiment. It is a perspective view of the upper cover for water tanks of 2nd Embodiment. It is a top view of the upper cover for water tanks of 2nd Embodiment. It is a side view longitudinal cross-sectional schematic diagram of the upper cover for water tanks of 2nd Embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION An aquarium upper cover according to an embodiment of the present invention will be described below with reference to the drawings. The embodiment described below is an example of the present invention, and the specific example does not limit the configuration of the present invention.

[First embodiment]
As shown in FIGS. 1 to 5, an aquarium upper cover (hereinafter referred to as "upper cover") 1 of the first embodiment includes a cover body 2, a window plate 3, and a sub-container 4. The cover main body 2 is placed on the upper edge portion (hereinafter referred to as "water tank upper edge portion") 6 of the water tank 5 and used. Moreover, the upper cover 1 can be used by installing the lighting fixture 7 in the cover main body 2 as needed. The upper cover 1 of this embodiment is applied to a so-called 60 cm water tank having a width of approximately 60 cm, a depth of approximately 30 cm, and a height of approximately 36 cm.

The cover main body 2 is formed in the shape of a substantially rectangular box that opens downward, and includes an upper wall (hereinafter referred to as "cover upper wall") 11 and four side walls (hereinafter referred to as "cover side walls"). ) 12. The cover body 2 is formed by bending sheet metal such as stainless steel or aluminum. In this embodiment, the width direction of the cover body 2 is defined as the front-back direction of the upper cover 1, the depth direction of the cover body 2 is defined as the left-right direction of the upper cover 1, and the height direction of the cover body 2 is defined as the top-bottom direction of the top cover 1. do.

The cover upper wall 11 is formed in a substantially flat plate shape, and is arranged to face the upper opening 5H of the water tank 5 from above when the cover main body 2 is properly installed on the upper part of the water tank 5 . Further, the cover upper wall 11 has a window hole 13 and a feed inlet 14 . Furthermore, the feed inlet 14 is provided with a slide door 15 capable of opening and closing the feed inlet 14 .

The window hole 13 is opened substantially in the central portion of the cover upper wall 11 . The window hole 13 is sized to surround an area slightly closer to the center than the outer peripheral edge of the cover upper wall 11, so that the inside of the water tank 5 can be observed from above, the inside of the water tank 5 can be cleaned, It becomes an opening for attaching the sub-container 4 or the like.

A projecting piece 16 projecting rearward is formed at a substantially central position between the left and right sides of the front edge of the window hole 13 . A plurality of screw holes (not shown) are provided in the cover upper wall 11 around the window hole 13 , that is, between the inner peripheral edge of the window hole 13 and the outer peripheral edge of the cover upper wall 11 . there is

The bait inlet 14 is opened at a position between the right and left sides of the upper cover wall 11 near the front edge of the center, that is, at the base end of the projecting piece 16 . The feed inlet 14 is a substantially rectangular through hole elongated in the left and right direction, and serves as an opening for feeding ornamental fish food or medicine into the water tank 5 .

The slide door 15 is a plate having a substantially L-shaped cross section with a front edge 15A bent upward. is slidably held in the front-rear direction on the lower surface of the . The slide door 15 is made of sheet metal such as stainless steel or aluminum, like the cover body 2 .

The projecting piece 16 is formed in a flat plate shape wider than the feed inlet 14 . The rear end edge of the protruding piece 16 is formed in a generally V-shape that protrudes rearward when viewed from above. Screw holes (not shown) are also provided on the projecting piece 16 at left and right positions of the feed inlet 14 .

The cover side wall 12 extends downward from the outer peripheral edge of the cover top wall 11 . A lower edge 17 of the cover side wall 12 (hereinafter referred to as a "side wall lower edge") is formed to have approximately the same front-to-rear and lateral dimensions as the upper edge 6 of the water tank. Therefore, when the cover main body 2 is placed on the water tank 5 , the entire periphery of the side wall lower edge portion 17 is abutted and supported over the entire periphery of the water tank upper edge portion 6 . That is, the cover side wall 12 is erected so as to surround the outer periphery of the upper opening 5H in a state in which the cover main body 2 is appropriately installed on the upper portion of the water tank 5, and the cover upper wall 11 is provided at the upper end thereof. It is As a result, it is possible to prevent water from splashing out of the water tank 5 from the upper opening 5H and the growing organisms from jumping out. In addition, it is possible to prevent accidental dropping of objects into the water tank 5 from the upper opening 5H.

The inner surface of the cover side wall 12 is mirror-finished by polishing, painting, silver deposition, or the like. Therefore, light passing through the window hole 13 from the outside of the cover main body 2 is reflected by the inner surface of the cover side wall 12 and directed downward into the water tank 5 . As a result, the ornamental fish and aquatic plants in the aquarium 5 are illuminated more vividly.

A fitting frame portion 18 is provided on each side wall lower edge portion 17 (see FIGS. 4 and 5). The fitting frame portion 18 is continuously provided along the side wall lower edge portion 17 in a substantially rectangular annular shape. Specifically, the side wall lower edge 17 is formed with an inner flange 19 that protrudes inward (toward the inside of the cover body 2 ) over substantially the entire circumference. It is bent downward from the inner edge.

Packings 21 and 22 are provided on the lower surface of the inner flange 19 and the outer surface of the fitting frame portion 18, respectively.
is provided. A packing (hereinafter referred to as “lower packing”) 21 on the lower surface of the inner flange 19 is a strip-shaped elastic member that extends along the lower surface of the inner flange 19 in a substantially rectangular annular shape. On the other hand, a packing (hereinafter referred to as “inner frame packing”) 22 of the fitting frame portion 18 is an elastic member having a substantially U-shaped cross section, and is arranged to hold the fitting frame portion 18 from below. 18 in a substantially rectangular annular shape. Therefore, when the cover main body 2 is properly installed on the upper portion of the water tank 5 , the inner flange 19 is supported by the upper end surface of the upper edge portion 6 of the water tank via the lower surface packing 21 . On the other hand, the fitting frame portion 18 is fitted inside the upper edge portion 6 of the water tank via the inner frame packing 22 from above. As a result, the cover main body 2 is prevented from shifting in the front-rear and left-right directions with respect to the water tank 5 . In addition, leakage of water from between the water tank 5 and the cover body 2 and precipitation of salt and calcium components are prevented.

A cover side wall (hereinafter referred to as "cover front wall") 12A on the front side of the cover main body 2 is formed in a generally arcuate cross-section projecting forward and upward of the cover main body 2, and extends forward from the front edge of the cover upper wall 11. It extends downward. In other words, the inner surface of the cover front wall 12</b>A is formed in a concave curved surface toward the upper front side of the cover body 2 .

A cover side wall (hereinafter referred to as a “cover rear wall”) 12B on the rear side of the cover main body 2 is formed in a substantially flat plate shape and extends downward from the rear edge of the cover upper wall 11 . Further, the cover rear wall 12B is provided with an auxiliary hole 23 and a connecting hole 24. As shown in FIG.

The auxiliary holes 23 are provided at positions near the left and right side edges of the cover rear wall 12B. In addition, the auxiliary hole 23 is a substantially circular through hole, through which a power cord for a heater, a water pump, etc. installed in the water tank 5 can be inserted, an air tube for aeration can be inserted, and an external filter can be supplied with water. It becomes an opening for inserting pipes such as pipes and water discharge pipes. An end surface protection frame 23A is provided around the inner peripheral edge of the auxiliary hole 23 (see FIG. 4). The cover body 2 also has a lid (not shown) capable of covering the auxiliary hole 23 . Therefore, the auxiliary hole 23 can be closed by the lid when not in use.

The connecting hole 24 is opened at a substantially central position between the left and right sides of the cover rear wall 12B. The connecting hole 24 has a screw hole 24A and an engaging hole 24B (see FIG. 4), and the lighting device 7 can be connected and fixed to the screw hole 24A and the engaging hole 24B. The screw hole 24A is a small circular through hole, and is opened at a substantially central position between the left and right sides of the cover rear wall 12B. The engaging hole 24B is a vertically elongated substantially rectangular through-hole, and is opened at left and right positions with the screw hole 24A interposed therebetween. The lighting fixture 7 installed on the upper cover 1 of the present embodiment is a so-called stand-type LED lighting lamp in which a light body 7B is connected to the upper end of the support 7A (see FIG. 1). It is supported in the upright state by the cover main body 2 by engaging the lower end portion with the two engaging holes 24B and fixing with screws in the screw holes 24A.

A cover side wall (hereinafter referred to as “cover left wall”) 12C on the left side of the cover main body 2 and a cover side wall (hereinafter referred to as “cover right wall”) 12D on the right side of the cover body 2 are both formed in a substantially flat plate shape. , and extend downward from the left and right edges of the cover upper wall 11 . Further, the cover left wall 12C and the cover right wall 12D are each provided with a handle portion 25. As shown in FIG.

The handle portion 25 is provided at a substantially central position between the front and rear sides of the cover left wall 12C and the cover right wall 12D. Further, the handle portion 25 is recessed in a substantially rectangular shape that is elongated in the front-rear direction. Accordingly, the user can easily place the upper cover 1 on the upper edge 6 of the water tank or remove the upper cover 1 from the upper edge 6 of the water tank by putting the four fingers of both hands on the left and right handle portions 25 respectively. can be removed at any time.

The window plate 3 is a transparent substantially flat plate, and is attached and fixed to the upper or lower surface of the cover upper wall 11 (periphery of the window hole 13) when the sub-container 4 is not used. Further, the window plate 3 is formed with front-rear and lateral dimensions larger than those of the window holes 13 . In this embodiment, the window plate 3 is attached to the lower surface of the cover upper wall 11 and covers the window hole 13 from below. The window plate 3 is made of a transparent synthetic resin material such as polycarbonate or acryl.

A plurality of screw holes (not shown) are provided in the outer peripheral portion of the window plate 3 at positions corresponding to the screw holes provided in the cover upper wall 11 . The window plate 3 is superimposed on the upper surface or the lower surface of the cover upper wall 11 so as to cover the entire window hole 13, and is fixed by screwing from above and below with a plurality of fixing screws 26 in each of the screwing holes. Thereby, the user can observe the inside of the water tank 5 from above through the window plate 3 without removing the upper cover 1 from the water tank 5 . In addition, light emitted from above the water tank 5 such as lighting equipment 7 and indoor lighting can be introduced into the water tank 5 through the entire surface of the window hole 13 . As a result, the ornamental fish and aquatic plants in the water tank 5 are illuminated more vividly.

In this embodiment, the fixing screw 26 is a thumbscrew that can be easily attached to and detached from the cover body 2 by the user's fingers. As a result, the window plate 3 can be easily replaced with the sub-container 4 or the sub-container 4 can be easily replaced with the window plate 3 .

The sub-container 4 is a substantially rectangular box that opens upward, and is configured to be embedded in the upper surface of the cover upper wall 11 in place of the window plate 3 . Specifically, the sub-container 4 has a container main body 31, a peripheral frame 32, and a grip 33. The sub-container 4 is attached and fixed to the upper surface of the cover upper wall 11 in a state in which the container main body 31 is dropped into the window hole 13. (see FIGS. 1 and 5). The sub-container 4 is made of a transparent synthetic resin material such as polycarbonate or acryl, like the window plate 3 .

The container body 31 has four side portions (hereinafter referred to as "container side portions") 34 and a bottom surface portion (hereinafter referred to as "container bottom portion") 35 (see FIGS. 1 and 5). ). Further, the container body 31 is formed to have smaller front-to-rear and left-to-right dimensions than the window hole 13 . Specifically, the front-to-rear dimension of the container body 31 is smaller than the dimension between the rear edge of the window hole 13 and the tip of the projecting piece 16 . On the other hand, the lateral dimension of the window hole 13 is formed smaller than the dimension between the lateral edges of the window hole 13 . Therefore, when the sub-container 4 is attached to the cover main body 2, a predetermined gap S1 is defined between the container main body 31 and the inner peripheral edge of the window hole 13. As shown in FIG. In particular, a wide gap S2 is defined at the left and right positions of the projecting piece 16 in front of the container body 31 (see FIGS. 3 and 5). Therefore, the light emitted from above the water tank 5, such as the lighting equipment 7 and the indoor lighting, is introduced into the water tank 5 through the gaps S1 and S2. Part of the light passing through the gaps S1 and S2 is reflected by the inner surface of the side wall 12 of the cover body 2 and introduced into the water tank 5 . Further, the light passing through the gap S2 in front of the sub-container 4 is reflected by the inner surface of the cover front wall 12A and introduced rearwardly and downwardly into the tank 5. As shown in FIG. As a result, the ornamental fish and aquatic plants in the water tank 5 are illuminated more vividly.

Further, the container main body 31 is configured such that a predetermined range above the lower surface portion 35 of the container is immersed to a position below the lower edge portion 17 of the side wall when the container main body 31 is buried in the window hole 13 . More specifically, when the sub-container 4 is attached to the cover body 2, the container body 31 has a side wall lower edge in a range approximately 1/3 upward from the lower edge of the container side surface 34 including the container lower surface 35. It is immersed to a lower position than 17 (see FIG. 5).

A water passage hole 36 is provided in the container body 31 . The water passage hole 36 is a small circular through-hole, and is within at least the above-described immersed range of the container body 31, that is, the range of approximately one-third above the lower edge of the container side surface portion 34 including the container lower surface portion 35. There are several inside. Therefore, if the sub-container 4 is buried in the upper surface of the cover upper wall 11 in a state in which water is stored in the water tank 5 up to the vicinity of the upper edge 6 of the water tank, part or all of the water passage hole 36 is submerged. , the water in the water tank 5 can flow into the container main body 31 . Thereby, the foliage plant P can be grown in the sub-container 4 .

Specifically, when the foliage plant P is grown in the sub-container 4, the container body 31 is filled with a culture material and the foliage plant P is planted. In this case, while the water level in the water tank 5 is maintained at a position above the lower surface part 35 of the container, the lower layer of the culture material is immersed in the water in the water tank 5, so watering is not necessary. In addition, if the container body 31 has a size (vertical height) that allows it to be immersed in the water tank 5 to a sufficient depth, the sub container 4 can grow ornamental fish instead of growing foliage plants P. It can also be used for breeding isolated from the water tank 5, breeding fry, breeding aquatic organisms other than ornamental fish, and storing live food. When ornamental fish are kept in isolation or juvenile fish are reared in the sub-container 4, it is preferable to perform aeration at a position below the container lower surface portion 35 at the bottom of the water tank 5. FIG. More specifically, an air stone is placed below the lower surface 35 of the container, and air is sent from an external air pump through an air tube to the air stone to release air bubbles. As a result, air and water can be appropriately supplied into the container body 31 through the water passage holes 36 of the container lower surface portion 35 .

The peripheral frame 32 is a transparent substantially flat plate-like plate, and extends outward from the upper end edge of the container side surface portion 34 . In addition, the peripheral frame 32 is formed to have longitudinal and lateral dimensions larger than those of the window holes 13 .

A plurality of screwing holes (not shown) are provided in the outer peripheral portion of the peripheral frame 32 at positions corresponding to the screwing holes provided in the cover upper wall 11 , similarly to the window plate 3 . With the container body 31 dropped into the window hole 13, the secondary container 4 is fixed by engaging the peripheral frame 32 on the outer peripheral surface of the window hole 13 and screwing it from above and below with a plurality of fixing screws 26 in each of the screwing holes. be done. As a result, the sub-container 4 is fixed in a state of being embedded in the upper surface of the cover upper wall 11 .

The grip 33 is a frame body formed by bending a substantially cylindrical bar material into a substantially inverted U shape. They are respectively connected and fixed at a central position (see FIG. 1). Therefore, the user can easily lift or take down the sub container 4 together with the contents in the container main body 31 by holding the left and right grips 33 with both hands.

As described above, according to the upper cover 1 of the present embodiment, by using the sub-container 4, it is possible to not only breed ornamental fish and grow aquatic plants in the water tank 5, but also cultivate foliage plants P. Moreover, even in that case, since the entire surface of the upper opening 5H of the water tank 5 is covered from above by the cover body 2 and the peripheral frame 32 of the sub-container 4, water splashing out of the water tank 5 and growing organisms are prevented. You can definitely prevent jumping out.

Further, in this case, instead of the sub-container 4, if the window plate 3 is attached to the periphery of the window hole 13, the entire surface of the upper opening 5H of the water tank 5 is covered from above by the cover body 2 and the window plate 3. Therefore, it is possible to introduce light from above into the water tank 5 through the entire surface of the window hole 13, and to reliably prevent the water from splashing out of the water tank 5 and the growing organisms from jumping out.

Further, in this case, even if the entire surface of the upper opening 5H of the water tank 5 is covered with the cover main body 2, the power cord, air tube, and pipes can be inserted into the water tank 5 through the auxiliary holes 23 provided in the cover rear wall 12B. Since it can be inserted, the convenience is also improved. Also, by inserting the power cord, air tube, and pipes through the auxiliary hole 23 as described above, they are not exposed to the top or side of the water tank 5, so that the appearance of the water tank 5 and its surroundings is remarkably improved.

Further, in this case, the fitting frame portion 18 provided on the lower edge portion 17 of the side wall of the cover body 2 is fitted into the inside of the upper edge portion 6 of the water tank from above, so that the cover body 2 can be moved forward, backward, left and right with respect to the water tank 5 . Since the displacement in the direction is prevented, it is possible to more reliably prevent water from splashing out of the upper opening 5H of the water tank 5 and the rearing organisms from jumping out. Moreover, in this case, water in the water tank 5 is separated from the water tank 5 and the cover main body 2 by the lower surface packing 21 provided on the lower surface of the inner flange 19 and the inner frame packing 22 provided on the outer surface of the fitting frame portion 18 . It is also possible to reliably prevent leakage from between.

[Second embodiment]
In the above embodiment, the sliding door 15 is slid back and forth to open and close the feeding port 14. However, as shown in FIGS. The upper cover 1 has a palate 45 capable of covering the feed inlet 44 instead of the slide door 15, and the palate 45 can be placed on the feed inlet 44 or removed from the feed inlet 44. By doing so, it is configured to open and close the feed inlet 44 .

More specifically, the upper cover 1 of the second embodiment has a substantially semicircular protruding piece 46 protruding rearward at substantially the center position between the left and right sides of the front edge of the window hole 13 . The bait inlet 44 is opened at the base end of the projecting piece 46 . Moreover, the bait inlet 44 is a circular through-hole.

The palate 45 is a hollow or solid sphere, and when it is placed on the food inlet 44 , the inner peripheral edge of the food inlet 44 is closed with a part of the lower spherical surface dropped into the food inlet 44 . abutted and supported. Thereby, the bait inlet 44 is sealed by the palate 45 in a watertight manner.

Other configurations are similar to those of the upper cover 1 of the first embodiment. Therefore, the same effects as those of the upper cover 1 of the first embodiment are obtained.

In addition, since the periphery of the bait inlet 44 and the palate 45 are easily soiled when baits and drugs are introduced into the water tank 5, they need to be cleaned periodically. However, according to the upper cover 1 of the second embodiment, since the food inlet 44 is formed in a circular shape and the palate 45 is also formed in a spherical shape, the periphery of the food inlet 44 and the palate 45 are not stained. Even if it adheres, it can be easily wiped off. Therefore, maintainability is greatly improved.

The palate 45 may be made of a metal material such as stainless steel or aluminum in consideration of maintainability, like the slide door 15 of the upper cover 1 of the first embodiment. In consideration of the airtightness of 44, it may be made of an elastic material such as natural rubber or synthetic resin. Moreover, the palate 45 is not limited to a sphere, and may be formed in a cylindrical shape, a conical shape, or a substantially hemispherical shape, as long as the food inlet 44 can be properly sealed. Further, while the feed inlet 44 is formed in a substantially rectangular shape, the palate 45 may be formed in a substantially rectangular shape in accordance with the shape of the feed inlet 44 .

In the above embodiment, the water passage hole 36 is provided within a range of approximately one-third above the lower edge of the container side surface portion 34 including the container lower surface portion 35 . The water passage holes 36 may be provided only in the container bottom surface portion 35 or may be provided only in the container side surface portion 34 as long as the water in the container 5 can appropriately flow. Moreover, the water passage hole 36 may be provided not only within a range approximately one-third upward from the lower edge of the container side surface 34 but also over substantially the entire surface of the container side surface 34 . may be provided only on a specific side surface of the

In the above embodiment, the water passage hole 36 is formed in a small circular shape. The water hole 36 may be formed in an elliptical shape, or may be formed in a small square shape. Further, it may be formed in a vertically elongated narrow linear shape (vertical slit shape), or may be formed in a horizontally elongated narrow linear shape (horizontal slit shape).

1 water tank 2 upper cover (upper cover for water tank)
3 window plate 4 sub-container 5 water tank 5H upper opening 6 upper edge of water tank (upper edge)
11 cover upper wall (upper wall)
12 cover side wall (side wall)
13 window hole 17 side wall lower edge (lower edge)
31 Container main body 32 Peripheral frame 35 Container lower surface (lower surface)
36 Water passage hole

Claims (4)

A water tank top cover for covering an upper opening of the water tank,
a substantially box-shaped cover body opening downward;
a substantially box-shaped sub-container that opens upward,
The cover body is
an upper wall facing the upper opening from above;
a side wall extending downward from the outer peripheral edge of the upper wall, the lower edge of which is supported in contact with the entire circumference of the upper edge of the water tank;
A window hole in which the secondary container can be embedded is provided in a substantially central portion of the upper wall,
An inner flange projecting toward the inside of the cover body is provided at the lower edge of the side wall,
A fitting frame portion protruding downward from the cover body is provided on the inner edge of the inner flange,
The sub-container is
a container body that is embedded in the window hole so that a predetermined range above the lower surface portion is immersed to a position below the lower edge portion of the side wall;
a peripheral frame extending outward from the container body and capable of being engaged and held by the outer peripheral surface portion of the window hole;
An upper cover for a water tank, wherein a water passage hole through which water in the water tank flows is provided at least within the submerged range of the container body. Equipped with a transparent window plate,
2. The aquarium upper cover according to claim 1, wherein said window plate can be attached to a peripheral edge of said window hole instead of said sub-container. The cover body is
3. The aquarium upper cover according to claim 1, wherein said side wall on the rear side is provided with an auxiliary hole through which a power cord or pipes can be inserted. The cover body is
A fitting frame portion is provided on the lower edge of the side wall to be inserted inside the upper edge of the water tank,
The water tank upper cover according to any one of claims 1 to 3, wherein a packing capable of preventing leakage of water from between the water tank and the cover body is provided on the outer surface of the fitting frame. .

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