JP2019088282A - Internal type filtering device - Google Patents

Abstract

To provide an internal type filtering device that is provided at a lateral surface in an aquarium, has a suction-up pipe for sucking up water which is formed by injection molding and significantly reduces cost for manufacturing the suction-up pipe.SOLUTION: In an internal type filtering device, a suction-up pipe P is configured by integrally joining a first suction-up pipe half body 17 to a second suction-up pipe half body 30, which are formed into a semi-circular cross-sectional shape, in a principal rafter manner. Respective suction-up pipe half bodies 17, 30 are formed by injection molding.SELECTED DRAWING: Figure 10

Description

  The present invention is an internal type filtration apparatus provided in an aquarium for breeding aquarium fish such as goldfish, tropical fish, and seawater fish, and in particular, can be compactly attached to the side in the aquarium and achieve significant cost reduction. Related to the internal filtration device.

  Conventionally, in order to breed and cultivate the ornamental fish in a water tank, an internal type filtration apparatus is known in which a filtration main body is attached to the side in the water tank to circulate and filter water in the water tank (for example, See Patent Document 1 below).

Japanese Examined Patent Publication 6-101975

  By the way, the internal-type filtration apparatus shown by the said patent document 1 comprises the suction pipe which accommodates the air pipe which attached Airstone, with a pipe material separate from a filter-medium holding | maintenance part, is filtered passing through a filter medium. Water is discharged to the water tank through this suction pipe.

  By the way, since the suction pipe is made of a pipe material, it is formed by extrusion molding of a material such as a synthetic resin material, but in general, the extrusion molding of the material is said to increase the manufacturing cost compared to the injection molding. There's a problem.

  The present invention has been made in view of the above circumstances, and a suction pipe for sucking up filtered water can be formed by injection molding so that the manufacturing cost of the suction pipe can be reduced, and the entire filtration apparatus can be greatly reduced. It is an object of the present invention to provide a novel internal type filtration device which can achieve cost reduction.

In order to achieve the above object, the invention according to claim 1 is a filter case fixed to a side surface in a water tank, a filter medium accommodated in the filter case, a suction pipe provided in the filter case, and The pump consists of a pump that exerts water absorption into the suction pipe, and after the filter medium is allowed to pass through and filter the water in the water tank by the operation of this pump, the inside sucked into the suction pipe and discharged into the water tank Type filtration device,
The suction pipe is formed by joining together a first suction pipe half and a second suction pipe half integrally formed in a semicircular shape in cross section, and each suction pipe half is , And are each formed by injection molding.

  In order to achieve the above object, the invention according to claim 2 is that according to the above-mentioned claim 1, the filter case detachably connects a first filter case and a second filter case. It is characterized in that one of the first and second suction pipe halves is formed by injection molding integrally with either one of the first and second filter cases.

  In order to achieve the above object, the invention according to claim 3 is the one according to claim 2, wherein the back surface of the first filter case is adsorbed to the side surface in the water tank via a suction cup, the back surface A seal band is formed around the periphery to close the gap between the back surface and the side surface in the water tank.

  In order to achieve the above object, the invention according to claim 4 relates to the invention according to claim 1, 2 or 3, wherein the upper half of the suction pipe is formed smaller in diameter than the lower half thereof. It is characterized by

  According to the invention of claim 1, the suction pipe for sucking up water is constituted by integrally connecting a pair of suction pipe halves formed in a semicircular shape in cross section, and each suction pipe half is Since each is formed by injection molding, the manufacturing cost of the suction pipe can be greatly reduced, and the shape freedom of the suction pipe can be enhanced.

  According to the invention of claim 2, the filter case is constructed by detachably connecting the first filter case and the second filter case, and one of the pair of suction pipes is connected to the first and second suction pipes. Since injection molding is carried out integrally with any one of the two filter cases, the filter case and the suction pipe can be integrated and they can be easily formed compactly.

  According to the invention of claim 3, the first filter case has its back surface adsorbed to a side surface in the water tank via a suction cup, and a gap between the back surface and the side surface of the water tank is provided around the back surface. Because a seal band is formed to close the small fish and juvenile fish do not enter between the side of the water tank and the filter case.

  According to the invention of claim 4, since the upper half of the air pipe inserted into the suction pipe is formed to have a smaller diameter than the lower half thereof, the wicking speed of water sucked up into the suction pipe can be increased. It can be accelerated.

The perspective view which shows the state which installed the internal-type filtration apparatus in the water tank An enlarged front view of the internal filtration device taken along line 2-2 of FIG. 1 An enlarged sectional view taken along line 3-3 of FIG. 2 An enlarged sectional view taken along line 4-4 of FIG. 2 An enlarged sectional view taken along line 5-5 of FIG. 2 Sectional view along line 6-6 in FIG. 2 Sectional view along line 7-7 in FIG. 2 Sectional view along line 8-8 in FIG. 2 Sectional view along line 9-9 of FIG. 6 An exploded perspective view of the internal filtration device Cross-sectional view showing how the filter medium is attached to and detached from the filtration case Cross-sectional view showing how the filter medium is attached to and detached from the filtration case Figure showing two sets of filter cases installed in a water tank

  Hereinafter, an embodiment of the present invention will be described based on the attached drawings.

  As shown in FIGS. 1 and 2, the internal filtration device is attached to the inner surface of the water tank V, and is a flat rectangular filter case C which is long in the vertical direction, and a plate removably housed in the filter case C. And a filter medium F in the form of

  First, the structure of the filtration case C will be described with reference to FIGS.

  The filter case C is composed of a first filter case 10 and a second filter case 20 which are openably connected to each other. The first filter case 10 is integrally formed by injection molding of a synthetic resin material, and includes a plate-like rear wall portion 11 and left and right side wall portions 12 and 13 standing forward substantially at right angles from the left and right side edges thereof. It is held by suction on the inner surface of the water tank V via a suction cup 50 attached to the back of the back wall 11. In addition, an endless seal band 14 is integrally formed on the back surface of the back wall 11 along the outer peripheral portion thereof, and the seal band 14 is in close contact with the inner surface of the water tank V and the inner surface and the first Small fish and fry are prevented from entering between the filter case 10 of

  Further, at the lower end of the first filtration case 10, a flow passage 15 having a rectangular cross-section is formed over the entire width thereof, and a cap 51 having an inlet 52 open is connected to the upstream end of the flow passage 15. The lower end of a suction pipe P described later is connected in communication with the downstream end thereof (see FIG. 2). A communication port 16 communicating with the downstream side filtration chamber B in the filter case C is opened on the upper surface of the water flow path 15, and filtered water flows into the water flow path 15 through the communication port 16. (See Figures 2, 5 and 7). The hinge pin 18 rotatably inserted in the hinge hole 24 of the 2nd filter case 20 is protrudingly provided by the lower both sides of the 1st filter case 10. As shown in FIG. A plurality of longitudinal ribs 19 are integrally formed on the inner surface of the first filtration case 10 at intervals, and between the inner surface of the first filtration case 10 and the filter medium F by these longitudinal ribs 19 In addition, the downstream side filtration chamber B in which the water after the filtration flows is formed.

  As shown in FIGS. 4 and 10, on the left side wall 12 of the first filtration case 10 to be injection molded, a first suction of a semicircular cross-section which constitutes a half of a suction pipe P described later The tube half 17 is injection molded in one piece.

  On the other hand, the second filtration case 20 is integrally formed by injection molding of a synthetic resin material as in the first filtration case 10, and is substantially perpendicular to the rectangular plate-like front wall 21 and its left and right side edges. It has left and right side wall parts 22 and 23 standing up to the rear, and is connected to the front of the first filtration case 10 so as to be able to open and close. In the front wall portion 21 of the second filtration case 20, a plurality of water suction ports 25 formed of slits are irregularly opened at intervals.

  The hinge holes 24 are respectively opened at the lower ends of the left and right side walls 22 and 23 of the second filtration case 20, and the hinge holes 24 are provided at the lower ends of the left and right side walls 12 and 13 of the first filtration case 10. The second filter case 20 supported rotatably on the hinge pin 18 (see FIG. 5) and supported on the water flow passage 15 of the first filter case 10 is the same as the first filter case 10. The hinge pin 18 can be opened and closed back and forth (see FIG. 11). The upper end of the first filter case 10 and the second filter case 20 are formed with a convex portion 10a and a concave portion 20a which can be engaged with each other, and they are engaged with each other to form a first filter case 10 The second filter case 20 is locked in the closed position (see FIG. 6).

  As shown in FIGS. 4 and 10, on one side of the filter case C, a suction pipe P for returning the filtered water into the water tank V is provided. The suction pipe P has a first suction pipe half 17 (which is injection-molded integrally with the first filter case 10 as described above) and a second suction pipe half which are semicircular in cross section. It is configured by engaging the body 30 in an integrated manner. The second suction pipe half 30 is injection molded as a single unit as shown in FIG. As shown in FIG. 4, engagement recesses 17 a formed on both side edges of the first suction pipe half 17 and engagement projections 30 a formed on both side edges of the second suction pipe half 30. Are detachably engaged with each other, and as shown in FIG. 8, the lower ends of the first suction pipe half 17 and the second suction pipe half 30 are engaged with the engagement projections 17b. Holes 30b are formed, which are releasably engaged.

  As shown in FIGS. 2, 8 and 10, the downstream end of the water flow passage 15 is in communication with the lower end of the suction pipe P, and the water pipe 31 opened in the water tank V is engaged with the upper end thereof. Be done. The upper half Pu of the suction pipe P is smaller in diameter than the lower half Pd.

  As shown in FIGS. 2 and 8, an air pipe 34 having an airstone 35 connected at its lower end is inserted into the suction pipe P, and an air pump AP is connected to the outer end of the air pipe 34.

  When the air pump AP is operated, pressurized air is spouted into the suction pipe P through the air pipe 34 and the airstone 35, and water in the filter case C is sucked into the suction pipe P from the water flow passage 15 Water in the water tank V is absorbed into the water tank V through the plurality of slit-like water inlets 25.

  Thus, the upper half Pu of the suction pipe P is formed to be smaller in diameter than the lower half Pd thereof, so the water in the suction pipe P is accelerated and rises in the suction pipe P. .

  As shown in FIGS. 5 and 10, hinge holes 24 are opened at the lower ends on the left and right sides of the second filter case 20, and these hinge holes 24 protrude at the lower ends on the left and right sides of the first filter case 10. The second filter case 20 is rotatably fitted in the hinge pin 18 provided, and the second filter case 20 can be opened and closed with respect to the first filter case 10 (see FIG. 11), as will be described later. Can be put in and out of the filter case C.

  As shown in FIGS. 2, 4, 7 and 10, the plate-like filter medium F is formed in a rectangular shape long in the vertical direction, and integrally integrates a thin hard filter medium 40 and a soft filter medium 41 thicker than that. It is configured to overlap. At the upper edge of the filter medium F, an edge frame 42 having a U-shaped cross section is fixed over the entire width. A handle 43 is integrally provided at the center of the rim 42. In the plate-like filter medium F, the hard filter medium 40 faces the front side (the side facing the second filter case 20), and the soft filter medium 41 faces the rear side (the side facing the first filter case 10) As described above, the upstream filter chamber A is inserted between the second filter case 20 and the filter medium F, and between the first filter case 10 and the filter medium F. The downstream side filtration chamber B is formed in (see FIG. 4).

  Next, the operation of this embodiment will be described.

  As shown in FIGS. 1 and 2, the filtration device of this embodiment is adsorbed and held on the side surface in the water tank V by the suction cup 50.

  Now, if the air pump AP provided outside the water tank V is driven, the unclean water in the water tank V is generated by the suction force generated in the suction pipe P by the pressurized air ejected from the airstone 35 through the air pipe 34. As shown in FIG. 2, the first flow (arrow a) and the second flow (arrow b) are diverted and drawn into the filter case. As shown in FIGS. 2, 4 and 7, the first flow (arrow a) flows from the water absorption port 25 → upstream filter chamber A → filter material F → downstream filter chamber B and is filtered, and then the communication port 16 → The second flow (arrow b) flows into the flowing water channel 15, and flows through the inflow port 52 opened in the cap 51 → the inflow path 15 without passing through the filter medium F, as shown in FIG. After joining the first flow (arrow a) and the second flow (arrow b) in the inflow path 15, the first flow (arrow a) and the second flow (arrow b) are sucked up in the suction pipe P and discharged from the water pipe 31 into the water tank V.

  By the way, the flow rate of water flowing through the filter medium F is adjusted by dividing the water flowing in the filter case C into the first flow (arrow a) and the second flow (arrow b), whereby the filter medium The filtration efficiency by F can be enhanced, and the propagation of aerobic microorganisms adhering to the filter medium F can be promoted. Further, since the upper half Pu is smaller in diameter than the lower half Pd of the suction pipe P, the water flowing in the suction pipe P is accelerated to enhance the filtration efficiency.

  In addition, filter medium F is polluted by the adhesion and accumulation of dirt such as dust, fish droppings, residual bait, etc. Therefore, it is necessary to periodically clean and replace it. In such a case, as shown in FIG. As shown, the second filter case is opened outward with respect to the first filter case, and the filter case F is cleaned with the filter case C attached to the water tank V by pulling out or inserting the filter medium F, Exchange work can be done.

  In addition, as shown in FIG. 12, the filter medium F can be pulled out or inserted without opening the second filter case 20.

  A second embodiment of the present invention is shown in FIG.

  According to the second embodiment, the filter case C has two first filter cases 10 (two times wider than the first filter case 10 of the first embodiment). The filter cases 20 are connected in parallel, and two sets of the filter cases C are attached to the side in the water tank V in parallel.

  In this case, the upstream end of the water flow passage 15 of one filter case C (FIG. 13, left side) and the downstream end of the water flow passage 15 of the other filter case C (FIG. 13, right side) are connected with each other. The cap 51 is connected to the upstream end of the other flow passage 15.

  According to this second embodiment, two sets of filter cases C, C (each filter case C is composed of one first filter case 10 and two second filter cases 20, 20) respectively The water in the water tank V that has flowed in and filtered is sucked into the suction pipe P and discharged into the water tank V.

  By the way, as shown in the first and second embodiments, the suction pipe P that sucks up the water has the first and second suction pipe halves 17 and 30 formed in a semicircular cross section. Since the suction pipe halves 17, 30 are integrally formed by joint bonding and are manufactured by injection molding, respectively, the manufacture of the suction pipe P as compared with the case where the suction pipe P is manufactured by the conventional extrusion molding The cost can be significantly reduced, and the shape freedom of the suction pipe P can be enhanced, and its diameter can be changed along its length, for example, as in the above embodiment. .

  In addition, the filter case C is configured by detachably connecting the first filter case 10 and the second filter case 20, and one of the pair of suction pipes P is the first and second filters. Since injection molding is carried out integrally with any one of the cases 10 and 20, the filter case C and the suction pipe P can be integrated to form them compactly easily.

  In addition, the first filter case 10 is held on the side surface in the water tank V with the back surface thereof via the suction cup 50, and seals around the back surface the gap between the back surface and the side surface of the water tank V Since the band 14 is formed, small fish and fry can not enter between the side of the water tank V and the filter case C.

  Furthermore, since the upper half Pu of the suction pipe P is formed to be smaller in diameter than the lower half Pd, the suction speed of water sucked into the suction pipe P can be increased.

  Although the embodiment has been described above, the present invention is not limited to the embodiment, and various other embodiments are possible within the scope of the present invention.

  For example, in the above embodiment, the filtration device comprises a filtration case consisting of one first filtration case and one second filtration case, or one first filtration case and two second filtrations. Although the case is provided with two sets of filter cases, for example, the filter device may be another combination such as provided with a set of filter cases consisting of one first filter case and two second filter cases. It is also good.

  In the above embodiment, the first suction pipe half is integrally injection-molded to the first filter case, but it may be integrally injection-molded to the second filter case. Good.

  Furthermore, in the above-mentioned embodiment, although water absorption power is generated in a suction pipe by an air pump, water absorption power may be generated in a suction pipe by other pumps, such as a water pump.

10 · · · · · First filter case 17 · · · · · · · First suction pipe half body · · · · · · · · · · · · · · · · · Seal band 20 · · · · · · · second Filter case 30 ·········· Second suction pipe half 50 ··········· Suction cup AP ·················· Pump (air pump)
C · · · · · · · Filtration case F · · · · · · · medium P · · · · · · · suction pipe Pu · · · · · · on half Pd · · · · · · lower half V ..... ... water tank

The present invention, goldfish, tropical fish, inside type filtration apparatus provided in the rearing aquarium ornamental fish, such as sea water fish, to the side of the water tank can be attached to the compact and to achieve a large cost reduction The present invention relates to an internal filtration device characterized in particular by its suction pipe structure.

  Conventionally, in order to breed and cultivate the ornamental fish in a water tank, an internal type filtration apparatus is known in which a filtration main body is attached to the side in the water tank to circulate and filter water in the water tank (for example, See Patent Document 1 below).

Japanese Examined Patent Publication 6-101975

  By the way, the internal-type filtration apparatus shown by the said patent document 1 comprises the suction pipe which accommodates the air pipe which attached Airstone, with a pipe material separate from a filter-medium holding | maintenance part, is filtered passing through a filter medium. Water is discharged to the water tank through this suction pipe.

Incidentally, the suction tube which has the pipe material, so that it is formed by formed-shaped material such as a synthetic resin material.

An object of the present invention is to provide a novel internal type filtration device that specifies the specific configuration of a suction pipe that sucks up water after filtration to enhance the function of the suction pipe.

In order to achieve the above object, the invention according to claim 1 is a filter case fixed to a side surface in a water tank, a filter medium accommodated in the filter case, a suction pipe provided in the filter case, and The water pump consists of an air pump that exerts a water absorbing capacity inside the suction pipe, and after the filter medium passes through the filter medium and is filtered by the operation of the air pump, the inside is sucked up into the suction pipe and discharged into the water tank. Type filtration device,
The suction pipe is formed in a cylindrical shape, and its upstream portion is formed smaller in diameter than its downstream portion .

In order to achieve the above object, the invention according to claim 2 is the one according to claim 1, wherein the connecting portion between the upstream portion and the downstream portion is formed into a funnel shape which is tapered from the downstream portion toward the upstream portion. It is characterized by being formed .

In order to achieve the above object, according to the invention of claim 3 , an air pipe connected to an air pump is inserted through the suction pipe in the invention according to claim 1 or 2, and the downstream end of the air pipe is inserted. An airstone accommodated in a downstream portion of the suction pipe is connected .

In order to achieve the above object, the invention according to claim 4 relates to the invention according to claim 1, 2 or 3, wherein a water pipe is connected to the downstream end of the downstream portion of the suction pipe, the water supply The open end of the pipe is characterized in that it is formed in an inclined surface having a downward slope from its upper edge to its lower edge .

According to the invention of each claim, the filter case fixed to the side surface in the water tank, the filter medium accommodated in the filter case, the suction pipe provided in the filter case, and the water absorption in the suction pipe In an internal type filtration apparatus comprising an air pump which exerts a force, and by operating the air pump, water in the water tank is filtered through the filter medium and then sucked into the suction pipe and discharged into the water tank, Since the upper half of the air pipe inserted into the suction pipe is formed smaller in diameter than the lower half, the wicking speed of water sucked into the suction pipe can be increased.

The perspective view which shows the state which installed the internal-type filtration apparatus in the water tank An enlarged front view of the internal filtration device taken along line 2-2 of FIG. 1 An enlarged sectional view taken along line 3-3 of FIG. 2 An enlarged sectional view taken along line 4-4 of FIG. 2 An enlarged sectional view taken along line 5-5 of FIG. 2 Sectional view along line 6-6 in FIG. 2 Sectional view along line 7-7 in FIG. 2 Sectional view along line 8-8 in FIG. 2 Sectional view along line 9-9 of FIG. 6 An exploded perspective view of the internal filtration device Cross-sectional view showing how the filter medium is attached to and detached from the filtration case Cross-sectional view showing how the filter medium is attached to and detached from the filtration case Figure showing two sets of filter cases installed in a water tank

  Hereinafter, an embodiment of the present invention will be described based on the attached drawings.

  As shown in FIGS. 1 and 2, the internal filtration device is attached to the inner surface of the water tank V, and is a flat rectangular filter case C which is long in the vertical direction, and a plate removably housed in the filter case C. And a filter medium F in the form of

  First, the structure of the filtration case C will be described with reference to FIGS.

  The filter case C is composed of a first filter case 10 and a second filter case 20 which are openably connected to each other. The first filter case 10 is integrally formed by injection molding of a synthetic resin material, and includes a plate-like rear wall portion 11 and left and right side wall portions 12 and 13 standing forward substantially at right angles from the left and right side edges thereof. It is held by suction on the inner surface of the water tank V via a suction cup 50 attached to the back of the back wall 11. In addition, an endless seal band 14 is integrally formed on the back surface of the back wall 11 along the outer peripheral portion thereof, and the seal band 14 is in close contact with the inner surface of the water tank V and the inner surface and the first Small fish and fry are prevented from entering between the filter case 10 of

  Further, at the lower end of the first filtration case 10, a flow passage 15 having a rectangular cross-section is formed over the entire width thereof, and a cap 51 having an inlet 52 open is connected to the upstream end of the flow passage 15. The lower end of a suction pipe P described later is connected in communication with the downstream end thereof (see FIG. 2). A communication port 16 communicating with the downstream side filtration chamber B in the filter case C is opened on the upper surface of the water flow path 15, and filtered water flows into the water flow path 15 through the communication port 16. (See Figures 2, 5 and 7). The hinge pin 18 rotatably inserted in the hinge hole 24 of the 2nd filter case 20 is protrudingly provided by the lower both sides of the 1st filter case 10. As shown in FIG. A plurality of longitudinal ribs 19 are integrally formed on the inner surface of the first filtration case 10 at intervals, and between the inner surface of the first filtration case 10 and the filter medium F by these longitudinal ribs 19 In addition, the downstream side filtration chamber B in which the water after the filtration flows is formed.

  As shown in FIGS. 4 and 10, on the left side wall 12 of the first filtration case 10 to be injection molded, a first suction of a semicircular cross-section which constitutes a half of a suction pipe P described later The tube half 17 is injection molded in one piece.

  On the other hand, the second filtration case 20 is integrally formed by injection molding of a synthetic resin material as in the first filtration case 10, and is substantially perpendicular to the rectangular plate-like front wall 21 and its left and right side edges. It has left and right side wall parts 22 and 23 standing up to the rear, and is connected to the front of the first filtration case 10 so as to be able to open and close. In the front wall portion 21 of the second filtration case 20, a plurality of water suction ports 25 formed of slits are irregularly opened at intervals.

  The hinge holes 24 are respectively opened at the lower ends of the left and right side walls 22 and 23 of the second filtration case 20, and the hinge holes 24 are provided at the lower ends of the left and right side walls 12 and 13 of the first filtration case 10. The second filter case 20 supported rotatably on the hinge pin 18 (see FIG. 5) and supported on the water flow passage 15 of the first filter case 10 is the same as the first filter case 10. The hinge pin 18 can be opened and closed back and forth (see FIG. 11). The upper end of the first filter case 10 and the second filter case 20 are formed with a convex portion 10a and a concave portion 20a which can be engaged with each other, and they are engaged with each other to form a first filter case 10 The second filter case 20 is locked in the closed position (see FIG. 6).

  As shown in FIGS. 4 and 10, on one side of the filter case C, a suction pipe P for returning the filtered water into the water tank V is provided. The suction pipe P has a first suction pipe half 17 (which is injection-molded integrally with the first filter case 10 as described above) and a second suction pipe half which are semicircular in cross section. It is configured by engaging the body 30 in an integrated manner. The second suction pipe half 30 is injection molded as a single unit as shown in FIG. As shown in FIG. 4, engagement recesses 17 a formed on both side edges of the first suction pipe half 17 and engagement projections 30 a formed on both side edges of the second suction pipe half 30. Are detachably engaged with each other, and as shown in FIG. 8, the lower ends of the first suction pipe half 17 and the second suction pipe half 30 are engaged with the engagement projections 17b. Holes 30b are formed, which are releasably engaged.

As shown in FIGS. 2, 8 and 10, the downstream end of the water flow passage 15 is in communication with the lower end of the suction pipe P, and the water pipe 31 opened in the water tank V is engaged with the upper end thereof. Be done. The upper half Pu of the suction pipe P is smaller in diameter than the lower half Pd. As clearly shown in FIG. 8, the outlet of the water pipe 31 is obliquely cut downward.

  As shown in FIGS. 2 and 8, an air pipe 34 having an airstone 35 connected at its lower end is inserted into the suction pipe P, and an air pump AP is connected to the outer end of the air pipe 34.

  When the air pump AP is operated, pressurized air is spouted into the suction pipe P through the air pipe 34 and the airstone 35, and water in the filter case C is sucked into the suction pipe P from the water flow passage 15 Water in the water tank V is absorbed into the water tank V through the plurality of slit-like water inlets 25.

  Thus, the upper half Pu of the suction pipe P is formed to be smaller in diameter than the lower half Pd thereof, so the water in the suction pipe P is accelerated and rises in the suction pipe P. .

  As shown in FIGS. 5 and 10, hinge holes 24 are opened at the lower ends on the left and right sides of the second filter case 20, and these hinge holes 24 protrude at the lower ends on the left and right sides of the first filter case 10. The second filter case 20 is rotatably fitted in the hinge pin 18 provided, and the second filter case 20 can be opened and closed with respect to the first filter case 10 (see FIG. 11), as will be described later. Can be put in and out of the filter case C.

  As shown in FIGS. 2, 4, 7 and 10, the plate-like filter medium F is formed in a rectangular shape long in the vertical direction, and integrally integrates a thin hard filter medium 40 and a soft filter medium 41 thicker than that. It is configured to overlap. At the upper edge of the filter medium F, an edge frame 42 having a U-shaped cross section is fixed over the entire width. A handle 43 is integrally provided at the center of the rim 42. In the plate-like filter medium F, the hard filter medium 40 faces the front side (the side facing the second filter case 20), and the soft filter medium 41 faces the rear side (the side facing the first filter case 10) As described above, the upstream filter chamber A is inserted between the second filter case 20 and the filter medium F, and between the first filter case 10 and the filter medium F. The downstream side filtration chamber B is formed in (see FIG. 4).

  Next, the operation of this embodiment will be described.

  As shown in FIGS. 1 and 2, the filtration device of this embodiment is adsorbed and held on the side surface in the water tank V by the suction cup 50.

  Now, if the air pump AP provided outside the water tank V is driven, the unclean water in the water tank V is generated by the suction force generated in the suction pipe P by the pressurized air ejected from the airstone 35 through the air pipe 34. As shown in FIG. 2, the first flow (arrow a) and the second flow (arrow b) are diverted and drawn into the filter case. As shown in FIGS. 2, 4 and 7, the first flow (arrow a) flows from the water absorption port 25 → upstream filter chamber A → filter material F → downstream filter chamber B and is filtered, and then the communication port 16 → The second flow (arrow b) flows into the flowing water channel 15, and flows through the inflow port 52 opened in the cap 51 → the inflow path 15 without passing through the filter medium F, as shown in FIG. After joining the first flow (arrow a) and the second flow (arrow b) in the inflow path 15, the first flow (arrow a) and the second flow (arrow b) are sucked up in the suction pipe P and discharged from the water pipe 31 into the water tank V.

  By the way, the flow rate of water flowing through the filter medium F is adjusted by dividing the water flowing in the filter case C into the first flow (arrow a) and the second flow (arrow b), whereby the filter medium The filtration efficiency by F can be enhanced, and the propagation of aerobic microorganisms adhering to the filter medium F can be promoted. Further, since the upper half Pu is smaller in diameter than the lower half Pd of the suction pipe P, the water flowing in the suction pipe P is accelerated to enhance the filtration efficiency.

  In addition, filter medium F is polluted by the adhesion and accumulation of dirt such as dust, fish droppings, residual bait, etc. Therefore, it is necessary to periodically clean and replace it. In such a case, as shown in FIG. As shown, the second filter case is opened outward with respect to the first filter case, and the filter case F is cleaned with the filter case C attached to the water tank V by pulling out or inserting the filter medium F, Exchange work can be done.

  In addition, as shown in FIG. 12, the filter medium F can be pulled out or inserted without opening the second filter case 20.

  A second embodiment of the present invention is shown in FIG.

  According to the second embodiment, the filter case C has two first filter cases 10 (two times wider than the first filter case 10 of the first embodiment). The filter cases 20 are connected in parallel, and two sets of the filter cases C are attached to the side in the water tank V in parallel.

  In this case, the upstream end of the water flow passage 15 of one filter case C (FIG. 13, left side) and the downstream end of the water flow passage 15 of the other filter case C (FIG. 13, right side) are connected with each other. The cap 51 is connected to the upstream end of the other flow passage 15.

  According to this second embodiment, two sets of filter cases C, C (each filter case C is composed of one first filter case 10 and two second filter cases 20, 20) respectively The water in the water tank V that has flowed in and filtered is sucked into the suction pipe P and discharged into the water tank V.

  By the way, as shown in the first and second embodiments, the suction pipe P that sucks up the water has the first and second suction pipe halves 17 and 30 formed in a semicircular cross section. Since the suction pipe halves 17, 30 are integrally formed by joint bonding and are manufactured by injection molding, respectively, the manufacture of the suction pipe P as compared with the case where the suction pipe P is manufactured by the conventional extrusion molding The cost can be significantly reduced, and the shape freedom of the suction pipe P can be enhanced, and its diameter can be changed along its length, for example, as in the above embodiment. .

  In addition, the filter case C is configured by detachably connecting the first filter case 10 and the second filter case 20, and one of the pair of suction pipes P is the first and second filters. Since injection molding is carried out integrally with any one of the cases 10 and 20, the filter case C and the suction pipe P can be integrated to form them compactly easily.

  In addition, the first filter case 10 is held on the side surface in the water tank V with the back surface thereof via the suction cup 50, and seals around the back surface the gap between the back surface and the side surface of the water tank V Since the band 14 is formed, small fish and fry can not enter between the side of the water tank V and the filter case C.

  Furthermore, since the upper half Pu of the suction pipe P is formed to be smaller in diameter than the lower half Pd, the suction speed of water sucked into the suction pipe P can be increased.

  Although the embodiment has been described above, the present invention is not limited to the embodiment, and various other embodiments are possible within the scope of the present invention.

  For example, in the above embodiment, the filtration device comprises a filtration case consisting of one first filtration case and one second filtration case, or one first filtration case and two second filtrations. Although the case is provided with two sets of filter cases, for example, the filter device may be another combination such as provided with a set of filter cases consisting of one first filter case and two second filter cases. It is also good.

  In the above embodiment, the first suction pipe half is integrally injection-molded to the first filter case, but it may be integrally injection-molded to the second filter case. Good.

  Furthermore, in the above-mentioned embodiment, although water absorption power is generated in a suction pipe by an air pump, water absorption power may be generated in a suction pipe by other pumps, such as a water pump.

31 ································································································································································································································· 31 31
34 · · · · · · · · · · · air pipe
35 ....... Easuton AP ······· pump (air pump)
C · · · · · · · Filtration case F · · · · · · · medium P · · · · · · · suction pipe Pu · · · · · · on half Pd · · · · · · lower half V ..... ... water tank

Claims (4)

A filter case (C) fixed to the side surface in the water tank (V), a filter medium (F) housed in the filter case (C), and a suction pipe (P) provided in the filter case (C) And a pump (AP) that exerts an absorbency in the suction pipe (P), and the operation of the pump (AP) allows water in the water tank (V) to pass through the filter medium (F) and filter Then, in the internal type filtration apparatus which sucks into the suction pipe (P) and discharges it into the water tank (V),
The suction pipe (P) is formed by joining together a first suction pipe half (17) and a second suction pipe half (30), which are formed in a semicircular shape in cross section. And each suction pipe half (17, 30) is formed by injection molding, respectively.   The filtration case (C) is configured by detachably connecting the first filtration case (10) and the second filtration case (20), and the first and second suction pipe halves ( The internal filtration device according to claim 1, wherein one of the first and second filtration cases (17, 30) is injection molded integrally with one of the first and second filtration cases (10, 20). .   The back face of the first filter case (10) is adsorbed to the side surface in the water tank (V) through the suction cup (50), and the back surface is surrounded by the back surface and the side surface in the water tank (V) 3. An internal filter device according to claim 2, characterized in that a sealing band (14) is formed which closes the gap between the two.   The inside according to claim 1, 2 or 3, characterized in that the upper half (Pu) of the suction pipe (P) is formed smaller in diameter than the lower half (Pd) thereof. Type filtration device.

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