JPH036693Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is a drain valve consisting of a valve seat provided on the bottom wall of a tank and a valve plate provided at the lower end of a long cylindrical operating rod; An operation handle that moves the rod up to open the drain valve, a float chamber that is placed above the drain valve to open the booth, and a stopper fixed to the outer periphery of the operation rod that moves inside the float chamber. The present invention relates to a drain valve device for a toilet cleaning tank, which is provided with a float arranged therein.

<Prior Art> Conventionally, as a drain valve device for a toilet flushing tank of this type, for example, as disclosed in Japanese Patent Application Laid-Open No. 57-165544, a control lever functioning as an overflow pipe is pulled up by manual operation of an operating handle. The drain valve opens, and most of the water in the tank passes through the passage between the outer cylinder and the float chamber, and the through hole drilled on the circumferential surface of the support tube connected below the float chamber. The remaining water passes through a space on the bottom wall of the float chamber and is drained from the drain valve into the toilet bowl.As the water level in the float chamber falls, the operating rod gradually lowers via the float and stopper, draining the water. There are some that delay the closing of the valve.

<Problem to be solved by the invention> However, in such conventional drain valve devices for toilet flushing tanks, an operating rod is inserted into the center of the top surface of the stopper, and if necessary, the two are fixed with adhesive or the like. Therefore, the stopper cannot be fixed at a predetermined position on the operating rod, and if the stopper is not fixed at a predetermined position, there is a problem that the drain valve cannot be reliably opened and closed.

Therefore, it is conceivable to integrally form an annular groove or a protrusion on the outer peripheral surface of the operating rod and fit the inner peripheral surface of the upper end of the stopper, but in this case, the operating rod may be elongated in the axial direction. Therefore, there is a problem that it is not only difficult to accurately position the groove or the protrusion, but also that it is expensive.

In addition, a separate connecting member is required at the upper end or midway of the operating rod to connect a connecting member such as a chain that communicates with the operating handle, which results in an increase in the number of parts, which is disadvantageous in terms of manufacturing, assembly, and cost. There is a problem with becoming.

In view of such conventional circumstances, an object of the present invention is to suppress an increase in the number of parts while reliably fixing a stopper without integrally forming a groove or a protrusion at a predetermined position of the operating rod.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is to divide the operating rod into upper and lower halves, fix a connecting tube between the two, and fix the connecting tube to the outer circumferential surface of the connecting tube. The inner circumferential surface of the upper end of the stopper is fitted into the inner circumferential surface of the upper end of the stopper, and an arm is provided to protrude from the connecting cylinder.

<Function> According to the above-mentioned technical means, the present invention has a connecting cylinder interposed between the operating rod divided into upper and lower parts, so that the operating rod and the stopper are integrated, and the connecting member is connected to the arm. and communicates with the operating handle.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 1, this embodiment shows a case in which the amount of water discharged is switched between washing feces and washing urine, and a drain valve a is provided at the bottom of the tank 1.

A valve seat 2a of the drain valve a is provided on a support tube 2 made of synthetic resin such as polypropylene, which is fixedly attached to the bottom wall 1a of the tank 1 by penetrating the bottom wall 1a.

That is, the support tube 2 has a stepped portion 2 formed at its intermediate portion.
It is formed into a cylindrical shape with the upper half 2c having a large diameter and the lower half 2d having a small diameter via the step part 2b. A through hole 2e communicating between the inside and the outside is opened, and an inner cylinder 3 formed approximately in the same shape as the upper half part 2c is attached to the upper end of the support cylinder 2.

The inner cylinder 3 consists of an inner and outer cylindrical inner wall 3a and an outer cylindrical wall 3b made of the same material as the support cylinder 2, and a bottom wall 3c connecting the lower ends of the inner and outer walls 3a, 3b. A float chamber 3d is formed between the float chamber 3b and a small hole-shaped booth 3e is bored in the bottom wall 3c, and the upper half 2 of the support tube 2 is connected to the float chamber 3d.
It communicates with the space 2f formed in c.

An annular hollow float 4 having an inner diameter larger than the cylindrical inner wall 3a and an outer diameter smaller than the cylindrical outer wall 3b is housed inside the float chamber 3d, and an operating rod is disposed inside the cylindrical inner wall 3a. 5 is slidably guided and inserted.

The operating rod 5 is integrally provided with a valve plate 5a made of an elastic sheet material such as rubber at the lower end.
A corresponds to the valve seat 2a of the support cylinder 2, and these two constitute a drain valve a.

The buoyant force of the float 4 is slightly larger than the downward force exerted on the operating rod 5 when the drain valve a is open, but when the drain valve a is closed, the downward force applied to the valve plate 5a is adjusted to the downward force exerted on the operating rod 5. It is set so that it is smaller than the force.

In addition, the operating rod 5 is a cylindrical body that passes through the top and bottom, and has the function of an overflow pipe.
A cylindrical connecting tube 5d is fixed between the two parts, and an annular groove 5b is provided on the outer peripheral surface of the connecting tube 5d so that the stopper 6 is inserted into the float chamber 3d. , a connecting member 9 such as a ball chain
arm 5c communicating with operating handle B via a
to protrude.

The stopper 6 is made of an elastic material, such as a synthetic resin such as hard polyethylene, and is formed into a skirt shape.
A hole 6a is bored in the center of the upper surface, and the inner diameter of the hole 6a is smaller than the outer diameter of the connecting tube 5d, and approximately the same diameter or slightly larger than the outer diameter of the groove 5b. The peripheral edge portion of 6a is fitted into the groove portion 5b using elasticity.

At this time, in order to facilitate the attachment and detachment of the stopper 6 if necessary, the thickness of the peripheral edge of the hole 6a may be adjusted to make it easier to attach and detach the stopper 6.
It may also be formed into a tapered shape that gradually becomes thinner toward the center.

Furthermore, by forming a plurality of notches 6b at appropriate intervals on the periphery of the hole 6a, air is prevented from accumulating inside the stopper 6.

Note that the groove 5b is not limited to the one described above, and may be directly recessed in the outer circumferential surface of the operating rod 5. In this case, the inner diameter of the hole 6a of the stopper 6 is used for operation located above and below the groove. Make the diameter smaller than the outer diameter of the rod 5.

On the other hand, a gasket 7 is interposed between the lower half portion 2d of the support tube 2 and the tank 1 to prevent leakage between the two, and this gasket 7 and the step portion 2
The outer cylinder 8 is held upright by the lower surface of b.

The outer cylinder 8 is a box made of synthetic resin such as polypropylene and has an upper inlet port 8a on its upper surface, and the peripheral edge of a mounting hole 8b drilled in the bottom of the outer cylinder 8 is held between the stepped part 2b of the support cylinder 2 and the packing 7. By fixing, the upper inlet 8a is located below the upper end of the cylindrical outer wall 3b of the inner cylinder 3, and a passage 8c is formed between the cylindrical outer wall 3b and the upper half 2c of the support cylinder 2.
form.

Further, the outer cylinder 8 has a lower inlet port 8d in the middle part of the side surface and an on-off valve body 8e made of synthetic resin that opens and closes this from the outside to constitute an on-off valve b. Both ends of the shaft rod 8f provided on the side plate are rotatably supported by a pair of bearings 8g provided on the outer surface of the side plate, so that the shaft rod 8f rotates in a hinged manner.

The on-off valve body 8e is normally located below the lower inlet 8d to open the on-off valve b due to its own weight, and a connecting member 9 such as a bead chain is provided on the on-off valve body 8e.
Opening/closing valve b can be closed by pulling b upward.

This connecting member 9b is operated by an operating handle B, which will be described later.

In this embodiment, the operation handle B consists of a large cleaning handle _B1 and a small cleaning handle _B2 , which are provided in parallel on the side wall 1b of the tank 1 as shown in FIG _. If you press down,
The valve plate 5a is connected to the connecting member 9a and the operating rod 5.
is pulled up to open the drain valve a, and when the small washing handle _B2 is pushed down, the connecting member 9b is opened.
The on-off valve body 8e is triggered via the on-off valve b
When the valve closes, the end of the large cleaning handle _B1 is pushed down to open the drain valve a.

Furthermore, a water supply device C is provided on the side wall 1b of the tank 1 to supply cleaning water into the tank 1.

In the case of the illustrated example, the water supply device C is a conventionally known ball tap with a hand washing pipe, and when the drain valve a is opened and the water in the tank 1 is drained into the toilet bowl, the float body _C1 lowers as the water level falls, and water is supplied. Open the valve and tank 1
Water is supplied to the interior and hand washing pipe _C2 .

The water supply by the water supply device C continues even after the drain valve a closes, but the water supply valve closes due to the rise of the float C ₁ as the water level in the tank 1 rises, and water supply from then on is stopped. Stop.

Next, to explain the operation of the drain valve device of such a toilet bowl cleaning tank, normally, as shown in Fig. 1, the drain valve a is closed, the on-off valve b is open, and the water level in the tank is cylindrical. It is located above the upper end of the outer wall 3b. now,
When the large washing handle B ₁ is pushed down for large washing, only the operating rod 5 is pulled up and raised, and the drain valve a is opened and the water pressure applied to the valve plate 5a disappears, so the buoyancy of the float 4 However, the operating rod 5 remains raised, and the large cleaning handle B ₁
Even if the operation is stopped, the drain valve a remains open, and the water in the tank 1 flows from the upper inlet 8a and lower inlet 8d of the outer cylinder 8 and the upper opening of the cylindrical outer wall 3b to the passage 8c and the through hole 2e. The water is drained from the drain valve a into the toilet bowl through booth 3e, and the water level begins to drop.

At this time, since the water flow area of the booth 3e is extremely small compared to the lower inlet 8d and the through hole 2e, when the water level falls from the upper end of the cylindrical outer wall 3b, the float chamber 3e
The falling speed of the water level in the float chamber 3d is slower than the falling speed of the water level in other parts, and the water level in the float chamber 3d is always higher than the water level in other parts (FIG. 4).

Even when the water level in the tank 1, excluding the cylindrical outer wall 3b where most of the water in the tank 1 has been discharged into the toilet bowl, has fallen to the lower edge of the lower inlet 8d and the required amount of water has been flushed, the inside of the float chamber 3d remains. There is still water remaining in the float chamber 3d, and the float 4 disposed in the float chamber 3d is in a floating state and prevents the operating rod 5, that is, the valve plate 5a, from descending via the stopper 6, thereby opening the drain valve a. I'm keeping it.

Therefore, after the water level drops to the lower edge of the lower inlet 8d, water is supplied from the water supply device B to the lower inlet 8d.
Only the water that has overcome d continues to be drained, and if the toilet is a siphon type toilet, this water can be used to seal the trap.

In addition, a small hole may be formed below the outer cylinder 8 separately from the lower inlet 8d for the purpose of increasing the amount of water sealing.

After that, the floating chamber 3d accompanies drainage from the small gap 3e.
The position of the float 4 is lowered due to the lowering of the water level in the tank, and accordingly, the valve plate 5a approaches the valve seat 2a, and the drain valve a
Close.

After the drain valve a is opened, the water in the float chamber 3d is further drained, and the float 4 continues to descend and separate from the stopper 6.
When the water in the float chamber 3d is completely drained, the float 4 comes into contact with the bottom wall 3c.

On the other hand, as the drain valve a closes, the water level in the tank 1 begins to rise (Fig. 5), and water flows in from the lower inlet 8d through the passage 8c and through hole 2e between the outer cylinder 8 and the cylindrical outer wall 3b. is the space 2f of the support tube 2, and the booth = 3
It flows into the float chamber 3d through e, and the float 4 floats up and comes into contact with the stopper 6 (FIG. 6). However, since water pressure is acting on the valve plate 5a, even if the buoyancy of the float 4 is applied to the operating rod 5, the operating rod 5 does not rise, and the drain valve a continues to close. The water level then rises further and returns to the state shown in Figure 1. Next, the small washing will be explained. At this time, when the small washing handle _B2 is pushed down, the on-off valve b is pulled up and closed. At this time, the downward movement of the small washing handle B ₂ also pushes down the large washing handle B ₁ , so the operating rod 5 is also pulled up and the drain valve a is opened, and the water in the tank 1 is discharged from the upper inlet of the outer cylinder 8. The water is discharged from the drain valve a through the passage 8c, the through hole 2e, and the booth 3e from the upper surface opening of the cylindrical upper wall 3b, and the water level in the tank 1 begins to fall.

At this time, the on-off valve body 8e is attracted by the water flowing in the passage 8c in the direction of blocking the lower inlet 8d, and the closed state of the on-off valve b is maintained even if the small washing handle _B2 is no longer operated. Ru.

When the water level continues to fall and reaches the upper end of the outer cylinder 8, that is, the upper inlet 8a, the amount of water discharged reaches a predetermined amount (FIG. 7).

At this time, water still remains in the float chamber 3d,
The buoyancy of the float 4 pushes the valve plate 5a through the stopper 6.
Drain valve a, which is lifted, is kept open.

On the other hand, the water pressure of the water remaining around the outer cylinder 8 acts on the on-off valve body instead of the suction force due to the water flowing through the passage 8c, and the closed state of the on-off valve b is maintained.

Therefore, the water that has passed over the upper inlet 8a and the water in the float chamber 3d due to the water supply from the water supply device B continues to be drained, and if the toilet is a siphon type toilet, it is used as a trap water seal in the same way as a deep flush. can.

At this time, since the cylindrical outer wall 3b is formed higher than the outer cylinder 8, no water flows into the float chamber 3d, and the water in the float chamber 3d flows out from the booth 3e and decreases. continues to descend, and the valve plate 5a continues to descend accordingly (FIG. 8).

Then, the water in the float chamber 3d further decreases, and accordingly the valve plate 5a also lowers, and the drain valve a closes.
After that, the water in the float chamber 3d decreases for a while, and the float 4 separates from the stopper 6 (FIG. 9).

On the other hand, by closing the drain valve a, the space 2f of the support tube 2 is filled with water that flows over the upper end of the outer tube 8 and into the outer tube 8, and further water flows into the float chamber 3d from the booth 3e. The float 4 is floated and brought into contact with the stopper 6 (FIG. 10).

After that, when the water levels inside and outside of the outer cylinder 8 become equal and the pressure inside and outside of the outer cylinder 8 becomes equal, and the force pressing the on-off valve body 8e against the lower inlet port 8d is released, the on-off valve body 8e rotates downward due to its own weight. The lower inlet 8d is opened again (FIG. 11). At this time, the on-off valve body 8e is provided with a weight portion 8h so that the on-off valve body 8e can smoothly rotate downward.

The water level in the tank 1 continues to rise further and returns to the state shown in FIG.

<Effects of the Invention> Since the present invention has the above configuration, it has the following advantages.

By interposing the connecting cylinder between the operating rod that is divided into the upper and lower parts, the operating rod and the stopper are integrated, and the connecting member is connected to the arm and communicates with the operating handle, so a groove is formed at a predetermined position on the operating rod. Alternatively, the stopper can be securely fixed without integrally forming the protrusion, and an increase in the number of parts can be suppressed.

Therefore, compared to conventional models in which the stopper cannot be fixed to a predetermined position on the operating rod, the drain valve can be opened and closed more reliably, and the stopper can be positioned more accurately and at a lower cost than those that have grooves or protrusions integrally formed on the operating lever. In addition to being inexpensive, there is no increase in the number of parts compared to conventional products that require a separate connecting member to connect a connecting member such as a chain to the upper end or midway of the operating rod. It is advantageous in terms of manufacturing, assembly, and cost.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a drain valve device for a toilet cleaning tank showing an embodiment of the present invention, Fig. 2 is a partially cutaway plan view showing an enlarged view of the main parts, and Fig. 3 is a perspective view of a stopper. FIGS. 4 to 11 are explanatory diagrams showing the operating states of the drain valve device. FIGS. 4 to 6 show the operation during feces washing, and FIGS. 7 to 11 show the operations during urine washing. a...Drain valve, 1...Tank, 1a...Bottom wall, 2a...
Valve seat, 3d...float chamber, 3e...booth, 4...float,
5... Operating rod, 5a... Valve plate, 5c... Arm, 5d...
Connecting tube, 6...Stopper, B...Operation handle.

Claims (1)

[Scope of utility model registration request] A drain valve consisting of a valve seat provided on the bottom wall of the tank and a valve plate provided at the lower end of a long cylindrical operating rod, and an operating handle that opens the drain valve by moving the operating rod upward. In a drain valve device for a toilet cleaning tank, comprising a float chamber arranged above the drain valve to open a booth, and a float arranged in the float chamber in conjunction with a stopper fixed on the outer periphery of an operating rod. , the operating rod is divided into upper and lower halves, a connecting tube is fixed between the two, the inner circumferential surface of the upper end of the stopper is fitted onto the outer circumferential surface of the connecting tube, and an arm is provided protruding from the connecting tube. A drain valve device for a toilet cleaning tank featuring: