JP3465137B2 - Water stopcock - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle having a feed screw portion screwed into a female screw of a water supply tool and a shaft portion coaxial with the feed screw section, and a spindle attached to the spindle. The present invention relates to a water stopcock including a seat packing that opens and closes a valve opening.

[0002]

2. Description of the Related Art Some of the water stopcocks incorporated in water supply tools such as water taps, connecting pipes (sockets, etc.) include, for example, FIG.
As shown in (b) and (b), there is one in which the shaft portion 50 constituting the spindle 31 and the feed screw portion 60 are formed separately (hereinafter referred to as Conventional Example 1). In this stopcock, the shaft 5
It is possible to integrate the spindle 31 by screwing the female screw 55 for connection of 0 and the male screw 65 for connection of the feed screw portion 60, and at the time of this integration, the flange of the shaft portion 50 is integrated. The seat packing 70 is sandwiched between the portion 56 and the feed screw portion 60, and the seat packing 70 is attached to the spindle 31.
Be attached to.

In the prior art example 1, since it is necessary to screw and connect the shaft portion 50 and the feed screw portion 60, not only the time and labor required for manufacturing increase but also there is a problem in reliability. .
That is, since the connecting male screw 65 is smaller in size than the male screw 61 for feeding the spindle 31 to the water supply tool, the connecting male screw 65 cannot withstand the torque applied to the spindle 31 when the water stopcock is operated. This is because there is a risk of destruction. In addition, the female screw 5 that has been fastened when operating the water stopcock, etc.
5 and the male screw 65 may be loosely screwed together.
Further, since the male screw 65 for connecting the feed screw portion 60 is inserted into the insertion hole 71 of the sheet packing 70, the sheet packing 70 may be damaged by the sharp screw portion.

As a solution to this problem, FIG.
As shown in (a), there is a water stopcock (hereinafter referred to as Conventional Example 2) in which the shaft portion 50 of the spindle 31 and the feed screw portion 60 are integrally formed. In this water stopper, a collar portion 56 having a diameter larger than that of the feed screw portion 60 is integrally projected from the peripheral surface of the shaft portion 50.
The sheet packing 70 is fitted into a mounting portion 57 formed between the feed screw portion 60 and the collar portion 56.

[0005]

However, the conventional example 2 also has the following problems. In Conventional Example 2,
Since the shaft portion 50 is provided with the flange portion 56 having a larger diameter than the feed screw portion 60, the seat packing 70 is mounted from the feed screw portion 60 side of the spindle 31. However, if this mounting is performed as it is, the male screw 61 of the feed screw portion 60 may come into contact with the inner wall surface of the insertion hole 71 of the seat packing 70 and damage the seat packing 70.

Therefore, in the conventional example 2, for example,
As shown by the broken line in FIG. 6B, a jig 90 or the like whose tip side is gradually reduced in diameter is attached to the feed screw portion 60, and the diameter of the sheet packing 70 is gradually increased while the jig 90 It is performed by moving from the front end side to the rear side and fitting into the attachment site 57. As described above, in the second conventional example, when the seat packing 70 is mounted, the jig 90 is used, which is complicated.
It requires a lot of work. In addition, since the seat packing 70 is largely elastically expanded by the jig 90 and mounted on the spindle 31, the deformation of the seat packing 70 may not be sufficiently restored. In this case, a sealing failure occurs between the seat packing 70 and the spindle 31,
The reliability as a water stopcock will be impaired.

By the way, in the conventional example 2, the insertion hole 71
If the diameter of the spindle 3 is made larger or the diameter of the feed screw portion 60 is made smaller, the spindle 3 is not required to be deformed without using the jig 90.
It becomes possible to attach it to 1. However, in this case, the seat packing 70 may be insufficiently mounted. This is because, for example, when a force in the direction of coming off the spindle 31 is applied to the seat packing 70, the seat packing 70 easily comes off. Also,
A gap is formed between the inner peripheral surface of the seat packing 70 and the outer peripheral surface of the mounting portion 57, or a sufficient contact area between the end surface of the seat packing 70 and the end surface of the feed screw portion 60 cannot be secured, so that the seat Poor sealing may occur between the packing 70 and the spindle 31. Furthermore, since the male screw 61 of the feed screw portion 60 is inserted into the insertion hole 71 of the seat packing 70, it is unavoidable that the seat packing 70 may be damaged by a sharp screw portion.

As described above, also in the second conventional example, the work of mounting the seat packing 70 is difficult and there is a problem in terms of reliability.

The respective inventions of the present invention have been made in view of such circumstances, and an object of the invention is to provide a water stopcock which is not only easy to install the seat packing but also has high reliability. To aim.

[0010]

Means for Solving the Problems In order to solve the above problems, the means adopted by the present invention is as follows. First, in the water stopcock according to the invention of claim 1, A water stopper having a feed screw part and a spindle having a shaft part coaxial with the feed screw part, and a seat packing attached to the spindle to open and close a valve port of a water supply tool, a feed screw portion and the shaft portion integrally formed to configure the spindle, an insertion hole provided in the sheet packing is inserted stop taps the spindle insertion hole from the shaft portion, the shaft
The diameter of the shaft and the feed screw is smaller than that of the feed screw.
Provide a step at the boundary with the shaft and attach a fixing member to the shaft.
And fix the sheet packing between the fixing member and the step.
What I did "is the summary. According to the invention of claim 2
In the case of a water stopcock, " a feed screw part that is screwed into the female screw of the water supply tool and
And a spindle having a shaft portion coaxial with the feed screw portion,
A seat attached to the spindle to open and close the valve opening of the water supply tool.
A water stopcock having a top packing, the feed screw
Part and the shaft part are integrally formed to form a spindle.
An insertion hole is provided in the sheet packing, and the space is inserted in the insertion hole.
Bundle a stop cock inserted from the shaft portion side, said sheet
A seating member that holds the shape of the packing
The main point is " being crowned ." According to the invention of claim 3
In the case of a water stopcock , " a feed screw that is screwed into the female screw
And a spindle having a shaft portion coaxial with the feed screw portion
Attached to the spindle to open and close the valve opening of the water supply tool
A stop cock with a sheet packing, and the feed
A spindle is constructed by integrally forming a screw part and a shaft part.
The seat packing with an insertion hole, and the insertion hole
Serial a stop cock inserted from the shaft portion side of the spindle, the
At the periphery of the insertion hole of the seat packing, supply water pressure from the valve port.
By providing a lip that flexes in the direction of diameter reduction and adheres closely to the shaft
The thing is "the thing" .

According to the first to third aspects of the invention, since the shaft portion and the feed screw portion are integrated, the reliability as the water stopcock is improved. Further, since the seat packing is attached to the spindle by passing through the shaft portion without passing through the feed screw portion, the work of mounting the seat packing can be smoothly performed without using a jig or the like. Further, at the time of this mounting work, the inner wall surface of the insertion hole of the sheet packing is not damaged. Here, the "water supply tool" of the inventions of claims 1 to 3 is not limited to a water faucet such as a single water faucet or a hot and cold water mixing faucet, but also, for example, Various devices installed around the faucet such as a connecting pipe (for example, a socket) interposed between the two are included.

In the inventions of claims 1 to 3, the means for fixing the seat packing to the spindle is not particularly limited. For example, a seat ring is attached to the shaft to prevent the seat packing from coming off. Various means such as screwing a setscrew into the packing itself to fix it to the shaft portion and adhering the sheet packing to the shaft portion can be adopted.

Next, in the water stopcock according to the first aspect of the present invention, "the shaft portion has a smaller diameter than the feed screw portion and a step portion is provided at a boundary portion between the shaft portion and the feed screw portion, The fixing member is attached to the shaft portion, and the seat packing is sandwiched between the fixing member and the step portion. "

According to the invention of claim 1 , the specific structure of the fixing means of the seat packing is limited, and the seat packing is sandwiched between the step portion and the fixing member, so that the seat packing can be fixed easily and firmly. it can.

In the invention of claim 1 , the specific form of the "fixing member" is not particularly limited, but for example, an E ring, a C ring and a snap ring fitted in a "mounting groove" provided in the shaft portion. And the like, a nut screwed to a "male screw" provided on the shaft portion, and the like. Also,
When sandwiching the seat packing between the step and the fixing member,
The sheet packing may be brought into contact with the step portion and the fixing member to be directly sandwiched, but it may be indirectly sandwiched by interposing various members therebetween.

Next, in the water stopcock of the invention of claim 4 , "In the water stopcock of any one of claims 1 to 3 , the inner diameter of the insertion hole of the seat packing is the outer diameter of the shaft portion. It is made smaller than "is the gist.

According to the invention of claim 4 , since the insertion hole of the seat packing has a smaller diameter than the shaft portion, the seat packing is elastically tightly fitted on the shaft portion. Therefore, the space between the seat packing and the shaft is more firmly sealed, and the reliability of the water stopcock is improved.

Next, the stop cock of the invention of claim 2, and its gist the "pre <br/> SL it has capped the holding member for holding the shape of the sheet packing sheet packing".

According to the second aspect of the present invention, the seat packing is reliably suppressed from being deformed by being bent by the water pressure supplied from the valve opening, and the reliability of the water stopcock is further enhanced. It should be noted that the holding member is not particularly limited in its form as long as it is a member that is attached to the seat packing, that is, a member that covers the end surface and the peripheral surface of the seat packing.
The fixing member in the first aspect of the invention may also be used.

Finally, in the stopcock according to the invention of claim 3 ,
As its gist the "on the periphery of the insertion hole before Symbol sheet packing, providing the lip portion in close contact with the shaft portion bends in the direction of reducing the diameter by supply pressure from the valve port."

According to the third aspect of the present invention, the water pressure from the valve port causes the lip portion to come into close contact with the shaft portion, so that the seat packing and the shaft portion are more firmly sealed, and the reliability of the water shutoff plug is improved. Is more enhanced. In the present invention, even if there is a clearance between the insertion hole and the shaft portion, if the lip portion is brought into close contact with the shaft portion by the water supply pressure from the valve port, the reliability of the water stopcock can be sufficiently secured. To be done.

Here, in order to more reliably achieve the object of the invention of claim 3, it is desirable to provide the "lip portion" in a thin shape to enhance its flexibility. In this regard, in the prior art example 1, if the seat packing 70 is provided with a thin-walled lip portion, the lip portion may come into contact with the male screw 65 to cause a crack when the seat packing 70 is attached,
The sheet packing 70 may be peeled off from other parts. In addition, in the conventional example 2, since the entire sheet packing 70 is expanded along the outer diameter of the jig 90 during the mounting work, the lip portion that was originally thin is "thinner".
Transforms into. Then, the lip portion deformed to “thinner” may come into contact with the peripheral surface of the jig 90 in a frictional state to cause a crack or peel from the other portion of the sheet packing. Therefore, in Conventional Example 1 and Conventional Example 2, it is difficult to provide the sheet packing 70 with the “thin-walled lip portion”. On the other hand, in the invention of claim 3 , the seat packing is directly mounted on the shaft portion, and since it is not necessary to use a jig during the mounting work, even if the lip portion is provided in a thin wall shape, the conventional example 1 and Problems such as those shown in Conventional Example 2 are unlikely to occur.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the "water stopcock" according to the present invention will be described in detail with reference to the drawings.
In addition, in this example, as shown in FIG. 1 and FIG.
An example in which the water stopcock 30 according to the present invention is adopted in the water stopcock unit 20 incorporated in the "connection pipe" which is one specific example of "0" will be described. Here, the connection pipe includes various types of water taps such as a single faucet, a hot and cold water mixing faucet, a water purifier faucet and a water treatment device faucet such as an alkaline ionized water producing device, and a water supply pipe and a hot water supply pipe It is interposed between water pipes.

The water supply tool 10 has a mounting portion 11 for housing the water shutoff unit 20 that is open to the front side. However, the attachment part 11 may be opened to other parts such as the side surface side, the upper surface side or the lower surface side of the water supply tool 10. The mounting portion 11 communicates with the inflow passage 13 through the communication hole 12 and communicates with the outflow passage 15 through the communication hole 14. Here, the communication hole 12 on the primary side also serves as a “valve opening 16” which is opened and closed by a water stopcock 30 described later, and the mounting portion 1 thereof.
A portion around the opening on the first side forms a valve seat 18 on which a seat packing 70 described later is seated. Further, the internal wall surface of the communication hole 12 is engraved with a female screw 17 that engages with the male screw 61 of the water stopcock 30. However, in each of the present invention, the communication hole 12 and the valve port 16 may be provided separately, or the female screw 17 may be provided at a position other than the communication hole 12 and the valve port 16.

The water stop unit 20 includes a spindle 31 having a shaft portion 50 and a feed screw portion 60 and a seat packing 7.
In addition to the water stopcocks 30 according to the present invention including 0 and 0, a waterstop cap 82 and a strainer 88 fixed to the waterstop cap 82 are also provided. The details will be described below.

As shown in FIG. 2, the water shut-off cap 82 is a substantially tubular member with a collar, and has a grip portion 84 on the circumferential surface on one end side.
And a male screw 85 is provided on the peripheral surface on the other end side. A seal member 86 such as an O-ring is fitted in the circumferential groove of the outer wall surface, and a seal member 87 such as an O-ring is fitted in the circumferential groove of the inner wall surface. A strainer 88 is fixed to the other end of the water shutoff cap 82. Here, as the strainer 88, for example, a substantially cylindrical material formed by weaving a wire material is used.

The water stop cock cap 82 integrated with the strainer 88 is inserted into the mounting portion 11 with the other end side of the strainer 88 at the top, and is incorporated in the water supply tool 10.
At the time of this assembling, the male screw 85 of the water stopper cap 82 is screwed into the female screw 19 of the inner wall surface on the opening side of the mounting portion 11 using the grip portion 84. At this time, the seal member 86 secures the watertightness between the inner peripheral surface of the mounting portion 11 of the water supply tool 10 and the outer peripheral surface of the water shutoff cap 82, and the seal member 87 protects the water shutoff cap 82 from the inside. Watertightness between the peripheral surface and the spindle 31 of the water stopcock 30 is ensured.

When the use of the water tap is started, the spindle 31 is operated from the front side of the water supply tool 10 by using the operating portion 51 of the water stopcock 30, and the spindle 31 is screwed back as shown in FIG. , The valve seat 18 is opened. On the other hand, at the time of construction or maintenance of the water faucet, the spindle 31 is operated by using the operation unit 51, and as shown in FIG.
1 is screwed to close the valve seat 18. Also, when performing maintenance or replacement of the strainer 88, it is possible to remove the water stopper cap 82 integrated with the strainer 88 from the water supply tool 10 after closing the valve seat 18. At this time, since the strainer 88 can be attached and detached while leaving the water stopcock 30 with the flow path closed,
It is also easy to carry out maintenance and replacement. still,
In this example, the water stopcock 30 and the strainer 88 are integrally incorporated, but they may be separately incorporated. However, it is effective in that maintenance work is facilitated if the water stopcock 30 and the strainer 88 are integrally incorporated so that the water supply tool 10 can be operated from one place as in this example.

By the way, as shown in FIG. 3, the water stopcock 30 includes a spindle 31 integrally provided with a shaft portion 50 and a feed screw portion 60 coaxially, and a sheet packing 70 attached to the spindle 31. The holding member 7 according to the invention of claim 2
7 and a fixing member 79 according to the invention of claim 1 . This will be described in detail below.

The shaft portion 50 is formed in a straight shape in which substantially the entire peripheral surface is smooth, and a substantially groove-shaped operating portion 51 is formed on one end surface thereof. In addition, a mounting groove 52 for a fixing member 79 formed of a retaining ring such as an E ring is provided on the peripheral surface of the shaft portion 50 near the feed screw portion 60. still,
In this example, a tool insertion groove into which a desired tool such as a flat-blade screwdriver is inserted is illustrated as the operation unit 51. However, the aspect of the operation unit 51 is not limited to this, and for example, a “grip part”, a “button” Other aspects such as

The feed screw portion 60 has a larger diameter than the shaft portion 50 according to the invention of claim 1 , and a step portion 33 is formed at a boundary portion between the shaft portion 50 and the feed screw portion 60.
Further, the feed screw portion 60 is formed in a substantially cylindrical shape, and the outer peripheral surface is engraved with a male screw 61 that engages with the female screw 17 of the water supply tool 10 and an opening for communication (two in this example). 62 is provided.

The sheet packing 70 is made of an elastic material such as rubber and has an insertion hole 71 in the axial direction. Here, on the outer peripheral edge side of the front surface 72 of the sheet packing 70,
The seat portion 73 projects in a substantially ring shape, and the front surface 72 side of the seat packing 70 serves as a seat portion for seating on the valve seat 18. Further, according to the invention of claim 3 , a lip portion 74 is projected in a thin ring shape on the inner peripheral edge portion of the insertion hole 71. Then, the seat portion 73 and the lip portion 74
The region sandwiched by and becomes a recess 76 that is recessed toward the rear surface 75 side of the seat packing 70, and promotes proper elastic deformation of the seat portion 73 and the lip portion 74. However, in each of the present invention, the structure of the seat packing 70 is not limited to this, and for example, the front surface 72 of the seat packing 70 may be made substantially flush, or the lip portion 7 may be provided from the substantially flush front surface 72.
4 may be launched. In addition, in each of the present invention, the seat packing 70 is not limited to this, and may be of another type such as one that is seated on the valve seat to open and close the flow path by being inserted into the inner wall surface of the valve opening 16. It can also be used.

In the present embodiment, according to the invention of claim 4 , the insertion hole 71 of the seat packing 70 has the shaft portion 5 of the spindle 31.
The diameter is smaller than 0, and when the seat packing 70 is mounted on the spindle 31, the seat packing 70 is mounted from the end of the shaft portion 50 on the side of the operation portion 51 while expanding the inner diameter of the insertion hole 71. It At the time of this mounting, the end portion 5 of the shaft portion 50 has a facing portion 5 for gently reducing the outer diameter.
3, the inner diameter of the insertion hole 71 is automatically increased by inserting the end of the shaft portion 50 into the insertion hole 71 and pushing the seat packing 70 into the shaft portion 50. Moreover, since the holding member 77 and the fixing member 79 are assembled after the seat packing 70 is mounted, the shaft portion 50
There is no portion that interferes with the mounting work on the “on the mounting path of the sheet packing 70” in FIG. As a result, the work of mounting the sheet packing 70 is smoothly performed, and there is no possibility that the inner wall surface of the insertion hole 71 is damaged.

By this mounting work, the seat packing 7
0 reaches the back end side of the shaft portion 50 and is in contact with the step portion 33. At this time, the inner diameter of the insertion hole 71 is set to the shaft portion 50.
Since the outer diameter of the seat packing 70 is smaller than the outer diameter of the seat packing 70, the seat packing 70 is elastically and tightly fitted to the shaft portion 50 by its elasticity in the diameter reducing direction. Further, the outer diameter of the feed screw portion 60 is equal to the shaft portion 50.
Since it is much larger than the outer diameter of the sheet packing 70, the contact area between the sheet packing 70 and the step portion 33 becomes sufficient.

The holding member 77 has a container shape in which a through hole 78 is opened at the bottom, and the shaft portion 50 of the spindle 31 is inserted into the through hole 78, and is attached to the rear surface 75 side of the seat packing 70. . Then, after the holding member 77 is attached to the seat packing 70, the fixing member 79 is fitted into the mounting groove 52 of the spindle 31. With the holding member 77 interposed, the seat packing 70 is fixed to the fixing member 79 and the step portion 33.
It is sandwiched and fixed by and.

In the inventions of claims 2 to 4 , unlike the present embodiment, the outer diameter of the entire spindle 31 is made substantially constant along the axial direction, or the shaft portion 50 is fed by the feed screw portion 60.
The diameter may be larger than that. In this case, on the front surface 72 side of the seat packing 70, another fixing member such as a retaining ring is attached to the shaft portion 50, or a flange portion is provided on the shaft portion 50 so as to project.
As shown in (b), the seat packing 70 may be sandwiched and fixed by the other fixing member 80 or the collar portion (not shown) and the fixing member 79.

By the way, in this example, the sheet packing 70
When is seated on the valve seat 18, the water supply pressure is applied to the front surface 72 from the valve port 16. At this time, as shown in FIG.
The seat portion 73 of the seat packing 70 tries to bend to the side opposite to the valve opening side (see the broken line arrow in the figure), but this deformation is suppressed by the holding member 77 and the seat portion 73 is maintained in a state of being in close contact with the valve seat 18. To be done. At the same time, the water pressure supplied from the valve port 16 causes the lip portion 74 to bend in the radial contraction direction and the shaft portion 50.
(See the one-dot chain line arrow in the figure), the sealing property between the seat packing 70 and the shaft portion 50 is ensured. Further, in this example, the sheet packing 70 is deteriorated and hardened,
Even if an unexpected "clearance" occurs between the inner wall surface of the insertion hole 71 and the shaft portion 50, the lip portion 74 bends in the diameter reducing direction due to the water supply pressure from the valve port 16 and comes into close contact with the shaft portion 50. For,
It provides a reliable sealing property and has excellent durability.

As a method for maintaining the shape of the sheet packing 70, various methods other than the holding member 77 according to the invention of claim 2 can be cited. For example, as shown in FIG. 4B, the seat packing 70 may have a core material 81 made of a high-rigidity material such as metal or resin incorporated therein to impart shape retention performance to the seat packing 70 itself. . However, in this case, if the inner peripheral edge portion of the insertion hole 71, the lip portion 74, and the seat portion 73 are portions that do not include the core member 81 and are easily elastically deformed, the mounting work of the seat packing 70 is facilitated. The advantage that the lip portion 74 and the sheet portion 73 function properly can be obtained. Also, the seat portion 7
3 and the lip portion 74 are made of a highly elastic material such as soft rubber, and the remaining portion of the seat packing 70 is made of a highly rigid material such as hard rubber or resin. Performance can be added.

Further, as in the invention of claim 3 , the lip portion 74
4C, as shown in FIG. 4C, the insertion hole 7
1 may have a larger diameter than the shaft portion 50, and a clearance may be provided between the two. In this case, when the seat packing 70 is seated on the valve seat 18, the water pressure from the valve port 16 causes the lip portion 74 to bend in the radial contraction direction and adhere to the shaft portion 50. A sufficient sealability between the inner wall surface and the shaft portion 50 is ensured. Therefore, such a clearance can be positively provided, and the mounting work of the seat packing 70 can be performed more smoothly.

[0040]

As described above, according to the present invention, not only the seat packing can be easily assembled but also a highly reliable water stopcock can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a water stopcock (water stopcock unit) according to an embodiment of the invention.

FIG. 2 is a vertical cross-sectional view showing a closed state of the water stopper (water stopper unit) of FIG.

FIG. 3 is an exploded vertical sectional view of the water stopcock of FIG.

4A is a partial vertical cross-sectional view showing the action of the seat portion and the lip portion, FIG. 4B is a partial vertical cross-sectional view showing another example of the water stopcock, and FIG. It is a partial longitudinal cross-sectional view which shows another example.

5 (a) is a vertical cross-sectional view of a water stopcock of Conventional Example 1, (b).
FIG. 4 is an exploded vertical cross-sectional view of a spindle included in the water stopcock of Conventional Example 1.

6A is a vertical cross-sectional view of a spindle included in the water stopcock of Conventional Example 2, and FIG. 6B is an exploded vertical cross-sectional view of the spindle of FIG. 6A.

[Explanation of symbols]

10; Water supply tool, 11; Mounting part, 12; Communication hole, 14; Communication hole, 13; Inflow passage, 15; Outflow passage, 16; Valve port,
17: Internal thread, 18; Valve seat, 19; Internal thread, 20; Water stop unit, 30; Water stop, 31; Spindle, 33;
Step portion, 50; Shaft portion, 51; Operation portion, 52; Mounting groove, 5
3; Facing part, 55; Female screw, 56; Collar part, 57; Mounting part, 60; Feed screw part, 61; Male screw, 62; Communication opening, 65; Male screw, 70; Seat packing, 71; Insertion Hole, 72; front surface, 73; seat portion, 74; lip portion, 7
5; Rear surface, 76; Recess, 77; Holding member, 78; Through hole, 79; Fixing member, 80; Other fixing member, 81; Core member, 82; Water stopper cap, 84; Handle part, 85; Male screw, 86; seal member, 87; seal member, 88; strainer, 90; jig.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E03C 1/04 F16K 1/48

Claims (4)

(57) [Claims] 1. A spindle having a feed screw portion screwed into a female screw of a water supply tool and a shaft portion coaxial with the feed screw portion,
A water stopcock having a seat packing attached to the spindle to open and close a valve opening of the water supply tool, wherein the feed screw portion and the shaft portion are integrally formed to form a spindle, an insertion hole provided in the sheet packing, sealing faucet der inserting the spindle from the shaft portion side in the insertion hole
The diameter of the shaft is smaller than that of the feed screw , and the shaft and feed screw are
The stepped portion is provided at the boundary with the shaft portion, and the fixing member is
Attach it, and sandwich the sheet packing between the fixing member and the step.
A stopcock characterized by having it . 2. A feed screw portion screwed into a female screw of a water supply tool and a feed screw portion.
And a spindle having a shaft portion coaxial with the feed screw portion,
A seat attached to the spindle to open and close the valve opening of the water supply tool.
A water stopper having a packing and a spindle in which the feed screw portion and the shaft portion are integrally formed.
The seat packing is provided with an insertion hole,
A water stopcock with the spindle inserted into the hole from the shaft side.
The sheet holding member that holds the shape of the sheet packing.
A water stopcock characterized by being attached to the packing. 3. A feed screw portion screwed into a female screw of a water supply tool and a feed screw portion.
And a spindle having a shaft portion coaxial with the feed screw portion,
A seat attached to the spindle to open and close the valve opening of the water supply tool.
A water stopper having a packing and a spindle in which the feed screw portion and the shaft portion are integrally formed.
The seat packing is provided with an insertion hole,
A water stopcock with the spindle inserted into the hole from the shaft side.
From the valve opening to the peripheral edge of the insertion hole of the seat packing.
A lip that bends in the direction of diameter reduction due to water pressure and sticks closely to the shaft
A stopcock characterized by being provided. 4. An inner diameter of an insertion hole of the seat packing is set as an axis.
The diameter is smaller than the outer diameter of the portion.
4. The water stopcock according to claim 3.