JP3086919B2 - Floating ball for float valve and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating ball constituting a float valve disposed in a toilet flushing water tank and the like, and to an improvement in a method of manufacturing the same.

[0002]

2. Description of the Related Art A conventional floating ball 1 for a float valve comprises a floating ball body 2 formed of a soft rubber material and a guide rod 3 formed of a hard material, as shown in FIG. The upper end of the guide rod 3 inserted from the lower end opening 2 a is joined to the inner ceiling 2 b of the floating ball body 2. As shown in FIG. 9, in the manufacture of the floating ball body, a molding space S is formed by the inner dies 4 and the outer dies 5 and 6 joined thereto, and a rubber material is injected into the molding space S and vulcanized. The molds 5 and 6 were divided and the spherical portion 4a of the inner mold 4 was extracted to obtain the floating ball body 2.

[0003]

The floating ball body 2
When the spherical portion 4a of the inner mold 4 is extracted, the lower end opening 2
a must be forcibly expanded. For this reason, the floating ball body 2 causes the sharpness 7, 7 to be generated on the seating surface 2c and lowers the yield, and the sharpness 7, 7 causes water leakage when the valve is closed, and causes the inside of the floating body 2 to be flooded. Or hinder a smooth float. Furthermore, since the floating ball body 2 requires the labor of manually joining the upper end of the guide rod 3 to the inner ceiling portion 2b of the floating ball body 2, it is very difficult to see the inside of the floating ball body 2, Poor productivity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a float for a float valve and a method for manufacturing the same, which can improve the yield and productivity by eliminating stiffness in a seating surface or the like in order to solve the above problems.

[0005]

The gist of the present invention is to provide a floating valve for a float valve, comprising: a hard material, a bowl-shaped floating ball upper half formed integrally with a guide rod; The lower half of the floating ball and the lower half of the floating ball facing the boundary where the upper half of the floating ball and the lower half of the floating ball match each other. A floating ball for a float valve, comprising: an annular connecting member straddling the periphery and closely contacting the periphery. Claim 2
The gist of the present invention described above is that, in the float for the float valve, the upper half of a bowl-shaped float that is formed integrally with the guide rod with a hard material, and the lower half of a bowl-shaped float that is formed of a soft material. A floating ball for a float valve, wherein the floating ball comprises a half portion and an annular fitting portion having irregularities formed on an opening peripheral portion of an upper half portion of the floating ball and a lower half portion of the floating ball. It is. The gist of the present invention described in claim 3 is that, in the floating ball for a float valve, a floating ball body integrally formed of a thermoplastic synthetic resin material with a guide rod, and a seating portion formed by fitting and contacting with the floating ball body. A floating ball for a float valve, comprising: an annular packing;

According to a fourth aspect of the present invention, there is provided a method of manufacturing a float for a float valve, wherein a bowl-shaped upper half of a float and a guide rod are integrally formed by injection molding with a hard material and a hollow material is formed by a soft material. The lower half of the bowl is injection molded, the upper half of the bowl is aligned with the lower half of the bowl, and the outer periphery of the upper half of the float and the outer periphery of the lower half of the float In addition, there is provided a method of manufacturing a floating ball for a float valve, wherein an annular connecting member is injection-molded so as to straddle and adhere to both outer peripheral edges. According to a fifth aspect of the present invention, in the method of manufacturing a floating ball for a float valve, the floating ball body is blow-molded integrally with a guide rod using a thermoplastic synthetic resin material, and an annular packing is fitted to and tightly attached to the floating ball body. A method of manufacturing a floating ball for a float valve, characterized in that a seating portion is formed by forming the seat.

[0007]

According to the first aspect of the present invention, since the upper half of the floating ball is bowl-shaped and the lower half of the floating ball is shaped like a hollow bowl, the upper half of the floating ball and the lower half of the floating ball are formed without causing sharpness. The lower half of the floating ball can be molded,
In addition, since both are connected by an annular connecting member which is in close contact with both outer peripheral edges of the boundary between the upper half of the floating ball and the lower half of the floating ball, there is no water leakage inside the floating ball, and furthermore, the guide rod and Since the upper half of the floating ball is integrally formed, the operation of connecting the guide rods can be omitted. According to the second aspect of the present invention, since the upper half of the floating ball is bowl-shaped and the lower half of the floating ball is shaped like a hollow bowl, the upper half of the floating ball and the lower half of the floating ball are formed without causing sharpness. Can mold half,
In addition, since the upper half of the floating ball and the lower half of the floating ball are fitted in a watertight manner, there is no water leakage inside the floating ball, and furthermore, the guide rod and the upper half of the floating ball are integrally formed. Therefore, the operation of connecting the guide rods can be omitted. According to the third aspect of the present invention,
Since the floating ball body can be molded by a blow molding method using a thermoplastic synthetic resin material without causing sharpness, there is no water leakage inside the floating ball body, and a ring that forms a seating portion on the floating ball body Since the packing is tightly fitted, there is no water leakage when the valve is closed. Further, since the guide rod and the floating ball body are integrally formed, the operation of connecting the guide rod can be omitted.

According to the fourth aspect of the present invention, since the upper half of the bowl-shaped floating ball and the lower half of the middle bowl-shaped floating ball are injection-molded separately, no sharpness occurs. Both can be molded,
Injection molding of the annular connecting material so as to be in close contact with the boundary between the matched upper half of the floating ball and the lower half of the floating ball, so that the floating ball that does not leak inside from the boundary can be formed and further guided Since the rod and the upper half of the floating ball are formed integrally, the operation of connecting the guide rods can be omitted. According to the fifth aspect of the present invention, since the floating ball main body is blow-molded, the floating ball main body can be formed without causing a sharpness that causes water leakage, and an annular packing is fitted to and tightly attached to the floating ball main body. To form a seating part
A floating ball that does not leak when the valve is closed can be formed. Further, since the guide rod and the floating ball main body are integrally formed, the operation of connecting the guide rod can be omitted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A float valve for a float valve and a method of manufacturing the same according to the present invention will be described below based on an embodiment shown in the drawings. (First Embodiment) FIGS. 1 to 4 show a first embodiment of a float for a float valve and a method of manufacturing the same according to the present invention.
FIG. 1 shows a float for a float valve, and FIG.
Is a front view in which the right half of the float for the float valve is sectioned, FIG. 2 (B) is a side view showing the hanging part, FIG. 2 is a sectional view showing a state in which a molding die is combined, and FIG. FIG. 4 is a sectional view showing a state in which the upper half of the ball and the lower half of the floating ball are formed, and FIG. 4 is a sectional view showing a state in which the upper half of the floating ball and the lower half of the floating ball are matched.

A float 11 for a float valve according to this embodiment is shown in FIG.
As shown in the figure, a bowl-shaped floating ball upper half portion 12 integrally formed with a guide rod 14 from a hard material such as ABS, polyethylene or polypropylene, and a soft rubber (for example, EPT or NB)
R) Bottom half of a floating bowl in the shape of a hollow bowl formed of a soft material such as R)
3, the upper half of the floating ball 12 and the lower half of the floating ball 13 facing the boundary portion 11a where the upper half of the floating ball 12 and the lower half of the floating ball 13 match.
And a ring-shaped connecting member 15 made of a hard material or a soft material that straddles and adheres to both outer peripheral edges 12a and 13a.
Both outer peripheral edges 12a of the floating ball upper half portion 12 and the floating ball lower half portion 13,
13a is formed with annular step portions 12b, 13b so that the annular flange portions 12c, 13c are reliably sandwiched by the annular connecting member 15. Floating ball lower half 13 has lower end opening 1 at the lower end.
3d is opened, the guide rod 14 is inserted, and a seating surface 13e is formed on the outer peripheral surface. Since the lower half 13 of the floating ball is shaped like a hollow bowl, it can be formed without causing a break in the seating surface 13e.

The upper half of the floating ball 12 has a suspension 16
And a connecting hole 18 for connecting the chain 17 to the hanging part 16 is formed. The connection hole 18 is the ball chain 1
7, a large diameter hole 18a for inserting the ball portion 17a, an upwardly inclined slit 18b for traversing the connecting wire 17b of the ball chain 17 in a forcedly shrunk state, and adjacent ball portions 17a, 17a of the ball chain 17. Inclined edge 18c-
1 is formed. Hanging part 16
The connection of the ball chain 17 to the connection hole 18 is performed by inserting appropriate number of the ball portions 17a into the large diameter hole 18a of the connection hole 18, traversing the connection wire 17b with the slit 18b, and moving to the engagement hole 18c. This is performed by clamping the peripheral edge slope 18c-1 of the engagement hole 18c between the adjacent ball portions 17a, 17a. Hanging part 16
Since the chain 17 can be attached to and detached from the connection hole 18, the chain 17 can be easily replaced even when the chain 17 has expired. On the other hand, in the prior art, a connecting fitting (not shown) is caulked into one connecting hole 8 of the hanging part 7 shown in FIG. At that time, it was necessary to exchange a new chain for the floating ball standard 2, which was uneconomical.

Next, a method of manufacturing a floating ball for a float valve according to the present invention will be described with reference to FIGS. First, as shown in FIG. 2, DSI (Die Slide I
molds 21 and 22 to which the manufacturing method can be applied
Prepare Next, the molding space A for molding the upper half of the floating ball and the guide rod integrally by aligning the molds 21 and 22 with each other.
And a molding space B for molding the lower half of the floating ball. Subsequently, as shown in FIG. 3, a hard material is injected into the molding space A to integrally mold the bowl-shaped floating ball upper half portion 12 and the guide rod 14, and a soft material is injected into the molding space B. The lower half 13 of the bowl-shaped floating ball is formed.

Subsequently, the molds 21 and 22 are separated from each other, and the molds 21 and 22 are relatively moved and then realigned with each other. The upper half portion 12 of the ball and the lower half portion 13 of the floating ball joined to the mold 22 are matched with each other, and a molding space C for molding an annular connecting material is formed between the mold 21 and the mold 22. I do. Next, a soft material or a hard material is injected into the molding space C, and the outer peripheral edge 12a of the opening portion of the upper half of the floating ball 12 and the outer peripheral edge 13a of the opening portion of the lower half of the floating ball 13 are provided with both outer peripheral edges 12a, 13a.
The annular connecting member 15 is formed so as to straddle and closely adhere to.
Finally, the molds 21 and 22 are separated, and the pin 23 for forming the connection hole is pulled out.
) To complete the production.

(Second Embodiment) FIGS. 5 and 6 show a second embodiment of a float for a float valve according to the present invention.
FIG. 5 is a front view in which the right half of the float for the float valve is sectioned, FIG. 6A is a front view in which the right half is shown in a state of being seated on a valve receiver, and FIG. It is a side view which shows the state which connected.

The float 31 for the float valve of the present embodiment has an AB
A bowl-shaped floating ball upper half 32 formed integrally with the guide rod 34 from a hard material such as S, polyethylene or polypropylene;
The lower half 33 of the floating ball is formed from a soft material such as soft rubber (for example, EPT or NBR), and the opening half 32a of the upper half 32 and the lower half 33 of the floating ball. , 3
The two are fitted in a watertight manner by the concave and convex annular fitting portions 32b and 33b formed in 3a so that water does not leak from the fitting portion into the floating ball 31. The floating ball lower half portion 33 has a lower end opening 33d opened at the lower end, the guide rod 34 is inserted therethrough, and a seating surface 33e is formed on the outer peripheral surface. Floating ball lower half 33
Since the is shaped like a hollow cylinder, it can be formed without causing a break in the seating surface 33e.

The upper half 32 of the floating ball is provided with a suspension 36
And a connecting hole 38 for connecting the ball chain 17 to the hanging portion 36 is formed. As shown in FIG. 6, the connection hole 38 has a slit 38b for forcibly traversing the connection wire 17b of the ball chain 17 and a peripheral portion sandwiched between the adjacent ball portions 17a, 17a of the ball chain 17. An engagement hole 38c is provided.

The valve receiving member 41 is provided with a guide rod insertion slit 42b on a side wall 42a of a guide portion 42 for guiding the guide rod 34 so as to be able to move up and down. The guide rod 34 is provided with a retaining portion 34a at a lower end portion thereof.
The guide hole 43 is formed in an appropriate shape such as a disk shape or a cross shape having a diameter larger than the inner diameter of the guide hole 43. The guide rod 34 is provided with a vertical notch 34b (see FIG. 5) for reducing the diameter as necessary on the outer peripheral surface thereof, so that the forcible fitting described later is facilitated.

The guide portion 42 of the valve receiver 41 is provided with the guide rod 3
The size of the guide rod insertion slit 42b is determined so that the guide rod insertion slit 42b can be forcibly inserted into the guide hole 43 from the water passage 44 through the guide rod insertion slit 42b. The slit 42b is formed of an elastic material such as a synthetic resin so as to widen the slit 42b. Since the float 31 for the float valve moves vertically from the position where the float valve seat 45 is seated to the floating position where the retaining portion 34a of the guide rod 34 collides with the guide portion 42, the guide rod 34 is guided by the guide hole 43. It is not necessary to provide the overflow pipe 46 with a stopper.

The floating ball 31 for the float valve of the present embodiment matches the upper half portion 32 of the bowl-shaped floating ball with the lower half portion 33 of the floating hole in the shape of a hollow bowl. Since the upper half 32 and the lower half 33 of the floating ball are water-tightly fitted together, the upper half 32 and the lower half 33 of the floating ball can be formed separately without causing any sharpness in the lower half portion 33 of the floating bowl. Since the guide rod 34 and the upper half 32 of the floating ball are formed integrally with each other without leaking into the floating ball 31, the connecting operation of the guide rod 34 can be omitted.

(Third Embodiment) FIG. 7 shows a third embodiment of a float for a float valve according to the present invention. FIG. 7 (A) is a front view of a right half section, and FIG. (B) is a bottom view. The float 51 for the float valve of this embodiment is made of ABS,
A floating ball body 52 integrally molded with a guide rod 54 from a thermoplastic synthetic resin material such as polyethylene or polypropylene;
An annular packing 55 formed of a soft material such as soft rubber (for example, EPT or NBR) which fits and adheres to the floating ball body 52 to form a seating portion. The floating ball body 52 has a hanging portion 56 protruding from an upper portion thereof and a connecting hole 18 for connecting a chain to the hanging portion 56 as in the first embodiment.

The floating ball main body 52 is blow-molded (not shown) integrally with the guide rod 54 using a thermoplastic synthetic resin material, and an annular concave groove 52a is formed in the lower half. The annular packing 55 is formed by injection molding or the like.
5a is formed. The annular packing 55 includes the floating ball body 5.
The annular projection 55a is fitted into the second annular concave groove 52a to fit and adhere to the floating ball main body, and the outer peripheral surface is used as the seating surface 55b.

In this embodiment, since the floating ball main body 52 is blow-molded, the floating ball main body 52 can be formed without causing sharpness which causes water leakage, and an annular packing 55 is formed on the floating ball main body 52. Since the seating surface 55b is formed by tightly fitting, the floating ball 51 that does not leak when the valve is closed can be formed. Further, since the guide rod 54 and the floating ball main body 52 are integrally formed, the guide rod 54 Can be omitted.

[0023]

As described in detail above, the present invention has the following excellent effects. In the floating ball for a float valve according to the first and second aspects of the present invention, the yield is improved by eliminating the sharpness of the seating surface and the like, and the productivity is improved by integrally forming the guide rod and the upper half of the floating ball. Can be improved. In the floating valve for a float valve according to the third aspect of the present invention, the yield is improved by eliminating the sharpness of the floating ball body, and the productivity is improved by integrally forming the guide rod and the floating ball body. .

According to a fourth aspect of the present invention, there is provided a method of manufacturing a float for a float valve according to the present invention. Productivity can be improved by integral molding and injection molding of the annular connecting member. In the method for manufacturing a float for a float valve according to the fifth aspect of the present invention, the yield is improved by blow molding to improve the yield, and the productivity is improved by integrally forming the float main body and the guide rod. Improvement can be achieved.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a float for a float valve according to the present invention, wherein FIG. 1 (A) is a front view of the right half of the float for a float valve, and FIG. It is a side view which shows a hanging part.

FIG. 2 is a cross-sectional view showing a first embodiment of a method of manufacturing a float for a float valve according to the present invention, in which a molding die is combined.

FIG. 3 is a cross-sectional view showing a state in which the upper half of the floating ball and the lower half of the floating ball are formed in the first embodiment.

FIG. 4 is a cross-sectional view showing a state in which the upper half of the floating ball and the lower half of the floating ball are matched in the first embodiment.

FIG. 5 shows a second embodiment of the float for a float valve according to the present invention, and is a front view in which a right half of the float for a float valve is sectioned.

6A and 6B show a second embodiment, wherein FIG. 6A is a front view of a right half showing a state of being seated on a valve receiver, and FIG. It is a side view showing a state.

7A and 7B show a third embodiment of a float for a float valve according to the present invention, wherein FIG. 7A is a front view of a right half section, and FIG. 7B is a bottom view.

FIG. 8 is a partially sectional front view showing a conventional float for a float valve.

FIG. 9 is a cross-sectional view illustrating a method of manufacturing a conventional float for a float valve.

[Explanation of symbols]

 11 (31, 51) Floating ball for float valve 1a ... Boundary part 12 (32) ... Upper half of floating ball 13 (33) ... Upper half of floating ball 12a, 13a ... Opening outer peripheral edge 14 (34, 54) ... Guide rods 15 ... Circular connecting material 52 ... Floating ball body 55 ... Circular packing

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Mikiya Asai 3-37, Iwatacho, Mizuho-ku, Nagoya-shi, Aichi (56) References JP-A-50-133638 (JP, A) JP-A-2-129478 (JP, U) Actually open sho 59-129974 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E03D 1/35

Claims (5)

(57) [Claims] 1. A floating ball for a float valve, comprising: an upper half portion of a bowl-shaped floating ball formed integrally with a guide rod of a hard material; and a lower half portion of a hollow bowl-shaped floating ball formed of a soft material. And an annular connecting member that straddles and adheres to both outer peripheral edges of the upper half of the floating ball and the lower half of the floating ball facing the boundary where the upper half of the floating ball and the lower half of the floating ball match. Floating ball for float valve. 2. A floating ball for a float valve, comprising: an upper half portion of a bowl-shaped floating ball formed integrally with a guide rod of a hard material; and a lower half portion of a hollow bowl-shaped floating ball formed of a soft material. A floating ball for a float valve, characterized in that both are water-tightly fitted to each other by annular projections and depressions formed on the periphery of the opening of the upper half of the floating ball and the lower half of the floating ball. 3. A floating ball for a float valve, comprising: a floating ball body integrally formed of a thermoplastic synthetic resin material with a guide rod; and an annular packing which is fitted and adhered to the floating ball body to form a seating portion. A floating ball for a float valve. 4. A method of manufacturing a floating ball for a float valve, comprising: integrally molding an upper half of a bowl-shaped floating ball of a hard material and a guide rod together with a lower half of a hollow bowl of a soft material. Injection molding, the upper half of the floating ball and the lower half of the floating ball are matched, and the outer peripheral edge of the opening of the upper half of the floating ball and the outer peripheral edge of the opening of the lower half of the floating ball are straddled over both outer peripheral edges. A method for manufacturing a float for a float valve, wherein an annular connecting member is injection-molded so as to be in close contact with each other. 5. A method for manufacturing a floating ball for a float valve, wherein the floating ball body is blow-molded integrally with a guide rod using a thermoplastic synthetic resin material, and an annular packing is fitted and adhered to the floating ball body to form a seating portion. A method for manufacturing a floating ball for a float valve, comprising: