JPH0222687B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Application Field The present invention provides a method for installing a plurality of water-absorbing structures at the bottom of an aquarium by embedding at least a portion of the gravel in the aquarium. The present invention relates to a bottom type filtration device that includes a flat casing having a mouth and a rising pipe that communicates with the inside of the casing, extends upward, and opens at the top to guide rising water flow.

(2) Prior Art Conventionally, in such filtration devices, the casing is installed at the bottom of the tank with a space between the casing and the inner surface of the tank.

(3) Problems to be solved by the invention However, if there is a space between the riser pipe and the inner surface of the aquarium, the ornamental fish kept in the aquarium may enter that space, causing problems between the riser pipe and the tank. Sometimes you get stuck and can't move.

The present invention was made in order to solve such conventional problems, and an object of the present invention is to provide a bottom type filtration device in which a riser pipe can be brought into close contact with the inner surface of an aquarium.

B. Structure of the Invention (1) Means for Solving the Problems According to the present invention, the riser pipe is formed by connecting a pair of attachment portions that form a slightly larger angle than the corner portions of the aquarium. It has a cross-sectional shape in which a back wall arranged facing the corner side and a front wall facing the inner side of the aquarium are connected to form a closed cross section, and the two sides of the aquarium constituting the corner are connected to form a closed section. Suction cups are fixedly attached to the outer surfaces of both attachment parts of the back wall so as to be attached to the side surfaces.

(2) Action When the back wall of the rising pipe faces the corner of the aquarium and is pressed against the corner, the front wall side ends of both mounting parts will come into contact with the two sides of the aquarium, and the suction cups will press against the two sides. adsorbs to. Therefore, the corners of the aquarium and both sides of the space between the risers are closed, and ornamental fish are reliably prevented from entering the space.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, an aquarium 1 for breeding ornamental fish such as goldfish, tropical fish, and saltwater fish is formed in a box shape. , there is gravel 2 in this tank 1.
is covered. A bottom filter device 3 is installed in the aquarium 1 to filter water using gravel 1 as a filter material.

In FIGS. 2 and 3, the bottom type filtration device 3 communicates with a casing 4 installed at the bottom of the aquarium 1 by at least partially, in this embodiment, completely buried in the gravel 2. The riser pipe 5 extends upwardly and opens at the top.

The casing 4 is formed in the shape of a flat rectangular box, and a large number of slit-shaped water intake ports 7 are formed on both upper and lower surfaces of the casing 4, respectively. Moreover, each water intake port 7
are respectively provided between a plurality of mutually parallel protrusions 8, and by doing so, each water intake port 7
is prevented from becoming clogged with gravel 2.

Short cylindrical connecting pipe parts 9 are integrally protruded from four corners of the upper surface of the casing 4, and one of the four connecting pipe parts 9 has a first connecting pipe 10. After being fitted and connected, the remaining connecting pipe portion 9 is closed with a cap 11.

The rising pipe 5 is attached to a corner part 12 formed by the two mutually orthogonal side surfaces 1 and 1b of the aquarium 1, and the second rising pipe 5 is fitted and connected to the lower part of the rising pipe 5. By interconnecting the communication pipe 13 and the first communication pipe 10, the riser pipe 5
is communicated into the casing 4.

Referring also to FIG. 4, the riser pipe 5 is made of, for example, synthetic resin, and its cross-sectional shape is formed by the back wall 14 facing the corner 12 side and the aquarium 1. The front wall 15 arranged facing inward forms a closed cross section and is interconnected.

The back wall 14 is formed by connecting a pair of mounting parts 16 and 17 with a connecting part 18.
17 is the angle α formed by the sides 1a and 1 of the aquarium 1.
The connecting portion 18 is arranged at an angle slightly larger than the angle b, that is, 90 degrees, and the connecting portion 18 is formed in a circular arc shape convexly curved toward the corner portion 12 side. On the other hand, the front wall 15
is formed into a trapezoidal shape that narrows toward the inside of the aquarium 1.

In the back wall 14, a pair of recesses 19 are provided on the outer surfaces of the mounting portions 16 and 17, spaced apart from each other in the vertical direction, and a receiving groove 20 is provided in the connecting portion 18. Moreover, the accommodation groove 20 is formed to extend vertically from the upper end of the riser pipe 5 to near the lower end, and an end wall 21 facing upward is provided at the lower end of the accommodation groove 20.

A suction cup 22 is attached to each of the recesses 19 of both the attachment parts 16 and 17 so that the base engages with the attachment parts 16 and 17, and the tip of each suction cup 22 is lower than the outer surface of the attachment parts 16 and 17. protrude outward.

Further, at the upper end of the riser pipe 5, a drain port 23 is provided which opens toward the inside of the water tank 1.

At the lower part of the riser pipe 5, an air injection member 6 formed into a cylindrical shape and made of a breathable material such as a foamable synthetic resin is disposed. This air injection member 6 is integrally provided with a small diameter connecting pipe 24, which projects into the housing groove 20 so as to penetrate through the end wall 21.

An air pump 25 is installed outside the water tank 1, and one end of a hose 26 is connected to the air pump 25. Moreover, the hose 26 is introduced into the housing groove 20 from above the rising pipe 5, extends downward within the housing groove 20, and is connected to the connecting pipe 24 of the air injection member 6.

Next, the operation of this embodiment will be explained with reference to FIG. In addition to installing it at the bottom, the rising pipe 5 is installed on both sides 1a and 1b of the aquarium 1.
Attach to.

When attaching the riser pipe 5 to the aquarium 1, it faces the corner 12 of the back wall 14. In this state, first, as shown by arrow Pa in FIG. 5a, one of the mounting parts 16 is pressed toward one side surface 1a of the aquarium 1 so that the suction cup 22 is attracted to the side surface 1a.

Next, as shown by arrow Pb in FIG. 5b, the other mounting portion 17 is pressed toward the other side surface 1b so that the suction cup 22 is attracted to the side surface 1b.
At this time, since the angle formed by both mounting portions 16 and 17 is slightly larger than the angle formed by both side surfaces 1a and 1b,
One mounting portion 16 has its front wall 15 side end connected to the side surface 1.
The connecting portion 18 side is separated from the side surface 1a in a state where it is in contact with the side surface 1a, and the pressure in the sealed space between the mounting portion 16 and the side surface 1a is reduced. Therefore, the suction force of the suction cup 22 becomes large, and the attachment part 16 is reliably attached to the side surface 1a.

When the pressing state of the mounting part 17 is released, the mounting part 1
7, as shown in FIG. 4, due to the adsorption force of the suction cup 22 on the mounting part 16 side to the side surface 1a, the end part on the front wall 15 side is brought into contact with the side surface 1b, and the connecting part 18 side is attached to the side surface 1a.
move away from b. As a result, the pressure in the sealed space between the suction cup 22 and the side surface 1b is reduced in the same manner as described above, and the suction force of the suction cup 22 is increased, so that the attachment portion 17 is reliably attached to the side surface 1b.

In such an attached state, the end portions of the attachment portions 16 and 17 on the back wall 14 on the front wall 15 side are in close contact with both side surfaces 1a and 1b of the water tank 1, and the space between the riser pipe 5 and the corner portion 12 is closed. Both sides are closed. Therefore, ornamental fish are reliably prevented from entering between the riser pipe 5 and the aquarium 1. Moreover, since the hose 26 is accommodated in the accommodation groove 20, the back wall 1
4 closer to the corner 12, the gap between the corner 12 and the back wall 14 can be made smaller, and this also allows ornamental fish to enter between the ascending pipe 5 and the aquarium 1. This will be prevented.

After completing the installation of the bottom type filtration device 3, the air pump 2
When pressurized air is supplied from 5 to the air injection member 6,
The air bubbles generated by the air injection member 6 rise within the riser pipe 5, and an ascending water flow is generated within the riser pipe 5. Therefore, a water flow toward the riser pipe 5 also occurs within the casing 4 that communicates with the riser pipe 5, and after the water in the water tank 1 passes through the gravel 2 and is filtered, it flows into the casing 4 from the water intake port 7. The water enters the tank, further rises inside the riser pipe 5, and flows back into the water tank 1 through the drain port 23.

In the above embodiment, the inside of the casing 4 is a mere space, but it is also possible to fill the inside of the casing 4 with a filtering material.

C Effects of the Invention As described above, according to the present invention, the riser pipe is formed by connecting a pair of attachment parts that form a slightly larger angle than the corner of the water tank, and is arranged facing the corner. The back wall facing the inner side of the aquarium and the front wall facing the inner side of the aquarium have a cross-sectional shape that is connected to form a closed cross section, and Since suction cups are fixed on the outside of both mounting parts of the back wall, the ascending pipe can be securely attached to the corner of the aquarium, ensuring that ornamental fish cannot enter between the ascending pipe and the aquarium. It can be prevented. Furthermore, by placing the riser pipe close to the corner, it is possible to create a sense of unity with the aquarium and to obtain a clean appearance.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall perspective view, FIG. 2 is an enlarged vertical cross-sectional view and a cross-sectional view taken along the - line in FIG. - line sectional view, FIG. 4 is an enlarged partial view of FIG. 3, and FIG. 5 is an enlarged sectional view corresponding to FIG. 4 for explaining the procedure for attaching the ascending pipe. 1...Aquarium, 1a, 1b...Side, 2...Gravel, 3...Bottom filter device, 4...Casing,
5... Rising pipe, 7... Water suction pipe, 14... Back wall, 1
5... Front wall, 16, 17... Mounting section, 18... Connecting section, 22... Suction cup.

Claims (1)

[Claims] 1. A flat casing that is installed at the bottom of the tank by being at least partially buried in the gravel laid in the tank and has a plurality of water intake ports; In the bottom-type filtration device, the riser pipe is formed by connecting a pair of mounting parts that form a slightly larger angle than the corner part of the aquarium, and the riser pipe is formed by connecting a pair of mounting parts that form a slightly larger angle than the corner part of the aquarium. It has a cross-sectional shape in which a back wall facing the tank and a front wall facing the inner side of the water tank are connected to form a closed cross section, and is attached to the two sides of the tank forming the corner portion. The bottom type filtration device is characterized in that suction cups are fixedly installed on the outer surfaces of both mounting portions of the back wall.