JP7211589B2 - Water flow control valve structure for water tank cleaning tools - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water flow control valve structure for an aquarium cleaning tool, which is capable of simultaneously changing water and cleaning gravel on the bottom of an aquarium for breeding ornamental fish.

2. Description of the Related Art Conventionally, there is already known an aquarium cleaning tool that sucks up aquarium water together with gravel containing filth such as fish droppings and leftover food to perform water change and cleaning of the bottom of the aquarium at the same time (for example, it will be described later). See Patent Document 1).

JP 2010-57475 A

By the way, in the above Patent Document 1, an upstream one-way valve Vu and a downstream one-way valve Vd are provided between the main body portion 1 and the grip portion 2 of the suction pipe P. A siphon action is established by sucking up aquarium water into a suction pipe, so that the aquarium water can be continuously sucked up.

The present invention provides a novel water flow control valve structure for a water tank cleaning tool, in which the downstream side one-way valve is improved so that the water tank water can always be sucked up smoothly and accurately into the suction pipe. intended to provide

In order to achieve the above object, the invention of claim 1 is a water flow control for a water tank cleaning tool, wherein water in the water tank is sucked up by a siphon action together with gravel at the bottom of the water tank and discharged to the outside of the water tank. In the valve structure, a suction pipe formed by connecting a grasping portion to the upper end of a main body portion formed in a length reaching from the outside of the water tank to the bottom of the water tank; a flexible water conduit, an upstream one-way valve and a downstream one-way valve spaced within the suction pipe and allowing water flow only from the suction pipe to the water conduit; The downstream one-way valve comprises a valve holder made of synthetic resin and fixed in the suction pipe, and a flexible valve body for opening and closing the valve opening of the valve holder. An annular concave groove is formed on the inner peripheral surface of the valve body seating surface of the holder to avoid seating of the valve body.

In order to achieve the above object, the invention of claim 2 is the one according to claim 1 or 2, wherein the valve opening and the annular groove of the valve holder are aligned with the axis of the downstream side one-way valve. It is characterized in that the valve opening, the annular groove and the valve body formed on the slanted surface are formed in an elliptical shape.

In order to achieve the object, the invention of claim 3 is the one described in claim 1 or 2, wherein the suction pipe has a water flow between the upstream one-way valve and the downstream one-way valve. It is characterized in that a suction operation tool is provided for pressurizing or decompressing the inside of the passage.

According to the invention of claim 1, in the water tank interior cleaning tool, the downstream side one-way valve includes a valve holder made of a synthetic resin material and fixed in the suction pipe, and a valve opening of the valve holder that opens and closes. An annular concave groove is formed on the inner peripheral surface of the valve body seating surface of the valve opening to avoid seating of the valve body. It is possible to avoid contact with burrs formed in the valve body, and to ensure that the valve body is seated on the valve body seating surface, thereby enhancing the function of the one-way valve.

According to the second aspect of the invention, the valve opening and the annular recessed groove of the valve holder are formed on an inclined surface that is inclined with respect to the axis of the downstream one-way valve. Since the annular groove and the valve body are formed in an elliptical shape, the aquarium water can flow smoothly through the one-way valve.

Further, according to the invention of claim 3, the suction pipe is provided with a suction operation tool for pressurizing or depressurizing the water passage between the upstream one-way valve and the downstream one-way valve. Therefore, a siphon action can be established in the suction pipe by pressing the suction operation tool.

Overall longitudinal side view of the cleaning tool in the water tank Enlarged cross-sectional view from arrow 2 in FIG. 3-line arrow view in FIG. Sectional view taken along line 4-4 in Fig. 2 Enlarged view of arrow 5 in Fig. 2 Cross-sectional view along line 6-6 in FIG. Cross-sectional view showing the action of the water tank cleaning tool

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.

As shown in FIGS. 1 and 2, the suction pipe P, which forms the main part of the water tank cleaning tool, is made of a transparent hard synthetic resin material, and has a length reaching from the outside of the water tank V to the bottom of the water tank V. A straight cylindrical main body portion 1 having an opening at the lower end (upstream end) and a grasping portion 2 bent at the upper end (downstream end) and connected to the upper end (downstream end) to form a V-shape when viewed from the side. formed. The gripping portion 2 is constructed by watertightly connecting an elbow pipe 2A and a straight pipe 2B so as to be removable.

The included angle θ between the central axis L1 of the main body portion 1 and the central axis L2 of the grip portion 2 is an obtuse angle, that is, about 105°. is less likely to touch the edge of the water tank V, and the operability is improved.

A truncated cone-shaped strainer S with a large number of slits 3 is provided inside the connecting portion between the upper end (downstream side) of the body portion 1 of the suction pipe P and the lower end (upstream end) of the grip portion 2. This strainer S allows the free passage of sewage containing fine dirt such as leftover food and fish droppings, but blocks the passage of coarse dirt such as dead leaves and stones. At the rear end of the strainer S, that is, at its outlet 4, an upstream one-way valve Vu is provided.

The upstream one-way valve Vu is, as shown in FIGS. , and a valve body 6 capable of opening and closing a valve port 5 opened on the outer surface of the valve holder 4 . The valve body 6 is made of a flexible thin synthetic resin plate and is tightly seated on the valve port 5 so as to be openable and closable. (lower) to downstream (upper) flow, but acts to prevent reverse flow.

As shown in FIGS. 2, 4 and 5, a downstream one-way valve Vd is provided at a downstream portion of the suction pipe P downstream of the upstream one-way valve Vu. This downstream side one-way valve Vd is sandwiched and fixed between the elbow pipe 2A and the straight pipe 2B of the grip portion 2. It is composed of a valve body 11 that is hingedly connected 12 to the valve opening 10 to open and close the valve opening. The valve port 10 is formed in an elliptical shape by being cut obliquely downward from the upstream side of the suction pipe P toward the downstream side, and the valve body 11 that opens and closes the valve port 10 is also formed in an elliptical shape. , is hinged 12 to the upper side of the valve holder 9, and the water pressure of the water flowing through the suction pipe P opens and closes the downstream one-way valve Vd.

By the way, since the cylindrical valve holder 9 is generally formed by molding a synthetic resin material, a burr B is formed on the inner peripheral edge of the valve body seating surface 9h of the valve holder 9 when the valve holder 9 is molded. This burr B impairs the adhesion of the valve body 11 .

For example, in the conventional example shown in FIG. 5 (the one of the above-mentioned Patent Document 1), burrs formed on the inner peripheral edge of the valve body seating surface of the valve holder interfere with the close contact of the valve body to the valve body seating surface. become.

According to the embodiment of the present invention, as shown in FIGS. 4 and 5, the inner peripheral surface of the valve body seating surface 9h formed at the valve port 10 of the downstream one-way valve Vd is entirely A recessed groove 9g is specially provided around the circumference to avoid seating of the valve body 11. The valve body 11 is seated on the inner peripheral edge of the valve body seating surface 9h where the burr B is formed by the recessed groove 9g. I'm trying not to. Therefore, even if the burr B is formed on the valve body seating surface 9h, the formation of the groove 9g on the valve body seating surface 9h prevents the valve body seating surface 9h from coming into close contact with the valve body 11 as described above. Therefore, the valve body 11 is in close contact with the valve body seating surface 9h, and the function of the downstream side one-way valve Vd is not hindered.

As shown in FIG. 2 , a connection pipe 15 is integrally connected to the downstream end of the grip portion 2 , and the upstream end of a water guide pipe 17 is connected to the connection pipe 15 via a joint 16 .

As shown in FIG. 1, the water guide pipe 17 has such a length that the downstream end of the water guide pipe 17 reaches below the water surface of the water tank V when the tip of the suction pipe P faces the bottom of the water tank V. That is, it is formed to have a length that allows the siphoning action of the cleaning tool to be described later.

As shown in FIGS. 2 and 3, on the curved upper surface of the elbow pipe 2A of the handle portion 2, a suction operation tool A for sucking water into the suction pipe P is provided. The suction operation tool A is composed of an operation portion 20 integrally provided on the curved upper surface of the elbow pipe 2A and a bellows body 30 attached to the operation portion 20. As shown in FIG. The operating portion 20 extends upward from the curved upper surface of the elbow pipe 2A and is formed in a short cylindrical shape with an upper surface 21 and a lower surface 22 open. It communicates with the inside of the water passage 24 between the downstream side one-way valves Vu and Vd, and its opening upper surface 21 is open to the outside. The cylindrical side wall 23 of the operating portion 20 has a rear half portion 23R on the side of the water guide pipe 17, which is a finger receiving recess that is lower than a front half portion 23F on the main body portion 1 side. The finger-receiving concave portion facilitates the pressing operation of the bellows body 30 to the most contracted position by the thumb. The bellows body 30 is formed of a bag-like bellows body with a closed upper surface, and has an opening 31 at its lower end and a pressing surface 32 at its upper end. It is held in a stretched state by force. The bellows body 30 has no other members inside, and its lower part is accommodated in the operation part 20, and the inlet/outlet 31 is connected to the opening lower surface 22 of the operation part 20 so that the bellows body Most of 30 is exposed to the outside from operation unit 20 . Further, the central axis L3 of the bellows body 30 passes through the body portion 1 of the suction pipe P. As shown in FIG.

2, the bellows body 30 is compressed to pressurize the water passage 24, closing the upstream one-way valve Vu and closing the downstream one-way valve Vd. open. When the pressing force of the pressing surface 32 is released, the bellows body 30 is restored to the extended position by its own elastic force, and the water passage 24 is decompressed. One-way valve Vd is closed.

A finger hooking piece 40 is integrally formed across the front surface of the operating portion 20 and the front surface of the handle portion 2, and the finger hooking piece 40 has an arc-shaped finger hooking concave portion 41 on the edge of the finger hooking piece 40 for hooking the finger of the operator. formed. A hanging hole 42 is formed in the finger hook piece 40 . When the cleaning tool is not in use, it can be hung on an appropriate hanger using the hanging hole 42. - 特許庁

Next, the operation of this embodiment will be described with reference to FIGS.

(1) As shown in FIG. 1, the open free end of the water guide pipe 17 is inserted into the collection tank Ba such as a bucket, and then the grip portion 2 is grasped with one hand.

The body portion 1 of the suction pipe P is vertically immersed in water of a water tank V. - 特許庁At this time, the water in the water tank V enters halfway (water surface) into the suction pipe P, so that both the upstream and downstream one-way valves Vu and Vd are opened and the suction pipe A part of the air inside P is discharged to the water guide pipe 17, and the air is released to the outside air.

(2) Next, as shown in FIG. 7(A), while holding the grip portion 2 with one hand, press the pressing surface 32 of the bellows body 30 of the suction operation tool A with the thumb as indicated by the arrow a. , the bellows body 30 is compressed when pressed. As a result, the volume of the bellows body 30 is reduced, and the inside of the water passage 24 is pressurized to close the upstream one-way valve Vu and open the downstream one-way valve Vd.

At this time, as shown in FIG. 2, the rear half portion 23R of the side wall 23 of the operation portion 20 is formed as a finger receiving recess lower than the front half portion 23F thereof, so that the thumb does not interfere with the operation portion 20. Therefore, the bellows body 30 can be compressed to the vicinity of the most retracted position as shown in FIG.

(3) Next, as shown in FIG. 7(B), when the pressure on the bellows body 30 is released, the bellows body 30 expands as shown by the arrow b to increase its volume, and the water passage 24 is filled with water. is depressurized, opening the upstream one-way valve Vu and closing the downstream one-way valve Vd. As a result, the aquarium water is sucked into the suction pipe P, and part of the suction water also flows into the bellows body 30 .

(4) As shown in FIG. 7(C), when the bellows body 30 is pressed again as indicated by the arrow a, the inside of the water passage 24 is again pressurized to close the upstream one-way valve Vu and the downstream side. Open the one-way valve Vd.

(5) By repeating the above operations (2) to (4) several times, the water in the tank V is forcibly sucked up into the suction pipe P by the pump action generated in the suction pipe P. After that, the siphon action is established, and the water flowing in the suction pipe P becomes a continuous flow and the water in the water tank V is discharged to the outside without performing the above operation.

According to this embodiment, as shown in FIG. 5, the inner peripheral surface of the valve body seating surface 9h formed in the valve holder 9 of the downstream side one-way valve Vd made of a synthetic resin material has a Since the groove 9g for avoiding seating of the valve element 11 is specially provided over the entire circumference, the groove 9g prevents the valve element 11 from being seated on the inner peripheral surface of the valve element seating surface 9h. be done. As a result, even if the burr B is formed on the valve body seating surface 9h, the valve body 11 can be tightly adhered to the valve body seating surface 9h by forming the concave groove 9g on the inner peripheral surface of the valve body seating surface 9h. leakage of aquarium water due to the opening and closing of the downstream one-way valve Vd is prevented, the flow and blockage are always performed accurately, the adhesion of the valve body 11 to the valve body seating surface 9h is enhanced, and the downstream The function of the side one-way valve Vd is enhanced.

A groove may be formed on the valve body seating surface of the upstream one-way valve Vu to avoid the valve body from being seated.

Although embodiments of the present invention have been described, the present invention is not limited to those embodiments, and various embodiments are possible within the scope of the present invention.

1・・・・・・・・・・main body portion 2・・・・・・・・gripping portion 9・・・・・・・・・・・・valve holder 9h・・・・・・・・・・・Valve body seating surface 9g・・・・・・・・Groove 10・・・・・・・・Valve opening 11・・・・・・・・Valve body 17・・・・・・・・・・Water Conveying Pipe 24・・・・・・・・Water Passage A・・・・・・・・Suction Manipulator P・・・・・・・・・・・Suction pipe V・・・・・・・・Water tank Vu・・・・・・・・Upstream one-way valve Vd・・・・・・・・Downstream one Directional valve L2・・・・・・・・Axis

Claims (3)

A water flow control valve structure for a water tank cleaning tool, wherein water in the water tank (V) is sucked up by a siphon action together with gravel on the inner bottom of the water tank (V) and discharged to the outside of the water tank (V), a suction pipe (P) formed by connecting a gripping portion (2) to the upper end of a main body portion (1) formed in a length reaching from the outside of a water tank (V) to the bottom of the water tank (V); A flexible water guide pipe (17) connected to the outer end of the upper pipe (P), and a water guide pipe (17) provided at intervals in the suction pipe (P) from the suction pipe (P) ), with an upstream one-way valve (Vu) and a downstream one-way valve (Vd), allowing water flow only to
The downstream one-way valve (Vd) includes a valve holder (9) fixed in the suction pipe (P) and made of synthetic resin, and a valve opening (10) of the valve holder (9). The inner peripheral surface of the valve body seating surface (9h) of the valve holder (9) is provided with an annular ring that avoids seating of the valve body (11). A water flow control valve structure for a water tank cleaning tool, characterized in that a concave groove (9g) is formed.
The valve opening (10) and the annular recessed groove (9g) of the valve holder (9) are formed on an inclined surface inclined with respect to the axis (L2) of the downstream one-way valve (Vd). , the valve port (10), the annular groove (9g) and the valve body (11) are formed in an elliptical shape. . The suction pipe (P) is provided with a suction operation tool ( 3. The water flow control valve structure for a water tank cleaning tool according to claim 1 or 2, wherein A) is provided.

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