JPH10238632A - U-packing and faucet using u-packing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate turned-up of a fin part of a U-packing in a case of axially sliding a sliding member by providing the ring U-packing for sealing a bore provided in a movable valve plate side and a piston and providing a constraint part in the fin part in the sliding side of the U-packing, the top part of the fin part, or between the fin part and the base part. SOLUTION: A faucet is provided with a piston 12 which is freely and relatively come forth from and come in a bore 11b opened in an operation block 11, a part projecting from the bore 11b is fixed to a prescribed position of a guide ring, and the interval between its circumference and the bore 11b is sealed by a U-packing 13. A ring projection 13d is provided in the tip of a fin part 13b of the U-packing 13 across the whole tip area of the fin part 13b as a constraint part for constraining the movement of the fin part 13b so that, if water pressure opening the fin part 13b outward in applied to the fin part 13b of the U-packing 13, the fin part 13b is hard to be opened outward and eliminates the fin part 13b from being turned up without increasing the resistance of the fin part 13b and the bore 11b inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid sealing part of an apparatus. Particularly, the present invention relates to a liquid sealing part such as a faucet fitting. Further, the present invention relates to a sliding valve type faucet that opens and closes a flow path by overlapping two valve plates and moving one of the valve plates by lever operation,
Particularly, the present invention relates to a faucet provided with a resistance mechanism for preventing a water hammer when the valve is closed.

[0002]

2. Description of the Related Art Conventionally, U-packing having a U-shaped cross section,
There is an O-ring having an O-shaped cross section. Further, as a general example of a sliding valve type, a single lever type faucet in which two valve plates are arranged in a main body and one of the valve plates is moved by lever operation to open and close a flow path. It has been known. In the case of the operation of moving the valve body by the lever, when water is stopped after use, the movement of the valve body rapidly shuts off the hole for the flow passage formed in the valve body, so that a water hammer is easily generated.

[0003] As a device for preventing a water hammer, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-174246, a water / water mixer tap for preventing a water hammer by slowing the movement of a valve plate when a valve is closed. There is. The water hammer prevention mechanism includes a lever, a bore provided on the movable valve plate side, and a piston that can be protruded and retracted from the bore, communicates the bore with the flow path, and moves the movable valve body in a valve closing direction. And a resistance mechanism capable of generating a resistance force by discharging the fluid in the bore to the flow path side when the pressure is increased, and sealing between the piston and the piston by an annular O-ring. In addition, sealing may be performed by U packing instead of the O ring.

[0004]

FIG. 9 is a view showing a state in which a conventional U packing is used for a piston of a faucet resistance mechanism, and FIG. 9 (a) is a view showing a state when a valve is opened. The vertical cross-sectional view of the main part, and (b) of the figure shows a vertical cross-sectional view of the main part showing the situation when the valve is closed. (B) of FIG.
This indicates a state in which the fins of the packing are turned up, the sliding resistance is increased, and the sliding members do not slide, resulting in functional failure. Further, when the O-ring is used as a liquid seal at a sliding portion, the O-ring has a large frictional resistance, so that a force is applied to slide the O-ring, and it is difficult to operate the sliding member. According to the present invention, even when the sliding member slides quickly in the axial direction, the fin portion of the U packing does not turn over and the sliding resistance is small.
Provide packing.

[0005]

The fin portion on the sliding side of the U packing is provided with a restraining portion for restraining the movement of the fin portion. Also, a restraining portion is provided above the fin portion. Further, a restraining portion is provided between the fin portion and the base portion.

[0006] A main body having a fluid inlet and an outlet, a sliding fixed valve plate and a movable valve plate disposed in a flow path between the inlet and the outlet, and operating the movable valve plate. Operating means for opening and closing the flow path, a bore provided on the movable valve plate side, and a piston which can protrude and retract from the bore, communicates the bore with the flow path, and closes the movable valve body. A faucet provided with a resistance mechanism capable of generating a resistance force by discharging fluid in the bore to the flow path side when moving in the valve direction;
The U-packing is characterized in that the U-packing is provided with a restraining portion for restraining the movement of the fin portion at a fin portion on the sliding side of the U-packing.

[0007] Further, the invention is characterized in that a restraining portion is provided on an upper portion of an annular U-packing fin portion for sealing between the piston and the piston. Further, a restraining portion is provided between the fin portion and the base portion.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side sectional view of a water faucet according to an embodiment of the present invention, which is used for a single lever type hot / water mixing faucet.

In FIG. 1, a main body 1 of a hot-water mixer tap is housed in an outer shell 2 made of a tube material and is housed therein, and is integrated with a main body block 3 made of a synthetic resin and the main body block 3 and an upper end of the main body block 3. , And a cover block 4.

A water supply pipe 5a and a hot water supply pipe are connected to a lower end of the main body block 3, and a mixed water of hot water and hot water is supplied to the main body block by an operation of a valve element housed in a cartridge type housing 6 incorporated in the main body block 3. It flows down around the block 3 and between the shells 2, and is discharged from the water discharge pipe 1 a connected to the shell 2.

At the lower end of the housing 6, a water supply pipe 5a and a connection seat 6a for connecting a flow path from the hot water supply pipe are provided. The connection seat 6a is provided with a water hole and a hot water hole, respectively. Provide a water outlet. At the upper end side of the housing 6, a retainer block 6e for holding the built-in valve element within its movable range is inserted and fixed, and a top block 6f is provided.

A fixed valve plate 7 is fixed at a fixed position inside the housing 6 and on the upper surface of the connection seat 6a, and a movable valve plate 8 is arranged on the fixed valve plate 7 so as to overlap.
The movable valve plate 8 is slidable with respect to the fixed valve plate 7.

FIG. 2 is a plan view showing a state in which the movable valve plate 8 is overlaid on the fixed valve plate 7 and the flow path is opened and closed depending on the position of the movable valve plate 8.

The valve plates 7 and 8 are made of ceramic. The fixed valve plate 7 has a water hole 7a and a hot water hole 7b communicating with a water supply pipe and a hot water supply pipe. A hole 7c for mixed water that can communicate with the mixed water outflow hole is opened. On the other hand, the movable valve plate 8 has a planar shape such that all the water holes 7a and the hot water holes 7b can be closed or partially opened by a vertical movement and a turning operation in the figure, and a mixed water Communication hole 8 that can be aligned with hole 7c
a is opened.

In the state shown in FIG. 2A, the movable valve plate 8 covers both the water hole 7a and the hot water hole 7b of the fixed valve plate 7,
The flow path from the water supply side and the hot water supply side is shut off to stop water.
Then, when the movable valve plate moves upward in the figure in this posture, the water hole 7a and the hot water hole 7b are opened as shown in FIG. Open with the valve opening. Thus, the flow ratio of the mixed water can be set by increasing the amount of the mixed water flowing from the communication hole 8a to the mixed water outflow hole 6d in accordance with the valve opening degree, with the ratio of the hot water to the water being 1: 1. .

FIG. 2C shows a state in which the movable valve body 8 at the valve-opening position shown in FIG. 2B is rotated counterclockwise around its center. At this time, only the water hole 7a is opened while the hot water hole 7b is fully closed, and only water is supplied to the water discharge pipe side. When the movable valve body 8 is rotated clockwise in the opposite direction, the movable valve body 8 in FIG.
Only the hot water hole 7b is opened.

Further, when the movable valve body 8 is pulled straight down to the lower right from the state shown in FIG. 3C, both the water hole 7a and the hot water hole 7b are closed by the movable valve plate 8, and the water is stopped. Return to

The movement of the movable valve plate 8 is operated by an operation member 9 protruding from the upper end of the main body 1. As shown in FIG. 1, an operation shaft 9a, a guide ring 10 and an operation block 11 are respectively incorporated between the operation member 9 and the movable valve body, and the movement of the operation member 9 is controlled by these operation shafts 9.
a and the operating block 11 enable transmission to the movable valve element 8.

In FIG. 1, the operating shaft 9a is
Is arranged so as to penetrate the retainer block 6e and the top block 6f fixed to the upper end of the base member, and is connected to the retainer block 6e as a spherical joint by forming a halfway in the axial direction as a spherical surface. The operation block 11 is housed in a guide ring 10 incorporated in the housing 6, and the movable valve plate 8 is integrally connected to the lower end thereof. The operating shaft 9a is connected to the retainer block 6e by means of a spherical joint, and the operating member 9 is turned by the vertical swinging operation and the left and right turning operation of the operating member 9.
1 is made to perform a forward-backward movement and a turning operation.

FIG. 3 is a longitudinal sectional view showing the housing 6 taken out of the main body 1, and corresponds to the state when the valve is closed in FIG.

The operating block 11 has a substantially rectangular cross-sectional shape, and is large enough to freely move left and right in the figure when it is stored in the guide ring 10. At the upper end of the operation block 11, a continuous seat 11a into which the lower end of the operation shaft 9a is fitted is provided so as to be recessed, and the operation block 9 is moved left and right by operating the operation member 9, and the turning operation is enabled. Further, as a resistance mechanism for giving resistance so that the movable valve plate 8 moves slowly at the time of the valve closing operation, a bore 11b opened in the operation block 11 and a piston 12 which can relatively protrude and retract from the bore 11b. Prepare.

The bore 11b has the same opening axis as the moving direction when returning the movable valve body 8 to its closed position, and a groove 11c is opened on the lower surface to connect the flow passage in the bore 11b with the flow path in the main body 1. ing.

The piston 12 has a portion protruding from the bore 11b restrained and incorporated into a part of the guide ring 10, and is fixed at a fixed position with respect to the guide ring 10. And a U-packing 13 which forms a sealing surface between them.

Here, when the operating member 9 is depressed, FIG.
As shown in (1), the operation block 11 moves to the left with respect to the piston 12 at the fixed position, and moves relatively so that the piston 12 comes out of the bore 11b. As a result, the bore 11b is filled with water from the groove 11c corresponding to the internal capacity of the bore 11b.

When the operating member 9 is pulled up to close the valve, the operation block 11 moves to the right in FIG. 4, so that the water in the bore 11b is pushed out from the groove 11c. The movement of the operation block 11 can be slowed down by the resistance due to the pushing. As a result, the moving speed of the movable valve plate 8 is also reduced, and the occurrence of a water hammer can be prevented by suppressing the rapid blockage of the flow path.

Here, particularly when operating the operating member 9 to close the valve, water pressure is applied to the fin portion of the U packing so as to open the fin portion outward, and the resistance between the fin portion and the inner surface of the bore 11b is large. The fin portion is turned up, the sliding resistance is increased, the piston 12 does not slide, and the operation of the operation member 9 becomes hard, resulting in a functional failure.

Then, in order not to deform the U packing,
A restraining portion for restraining the fin portion is provided. Examples thereof are shown in FIGS.

In the example shown in FIG. 5, an annular projection 13d is provided at the tip of the fin 13b as a restraining portion for restraining the movement of the fin 13b over the entire tip of the fin 13b. Therefore, even if water pressure is applied to the fin portion 13b of the U packing 13 to open the fin portion 13b outward, the fin portion 1
3b is difficult to open outward, the resistance of the fin portion 13b and the inner surface of the bore 11b is not increased, and the fin portion 13b does not turn over.

FIG. 6 is a view showing a state in which the U-packing of FIG. 5 is used for the piston 12 of the faucet resistance mechanism. FIG. Fig. 2 (b) is a longitudinal sectional view of the main part showing the situation when the valve is closed. Fin 13 of U packing 13 when valve closed
Even if water pressure is applied to b to open the fin portion 13b outward, the fin portion 13b is unlikely to open outward, so that the resistance between the fin portion 13b and the inner surface of the bore 11b does not increase and the fin portion 13b does not turn over.

In the example of FIG. 7, a fin 13b is provided at the tip of the fin 13b as a restraining portion for restraining the movement of the fin 13b.
Are provided with projections 13e at four positions at the tip of the. Therefore, even if water pressure is applied to the fin portion 13b of the U-packing 13 to open the fin portion 13b outward, the fin portion 13b is unlikely to open outward, and the resistance of the fin portion 13b and the inner surface of the bore 11b does not increase. The part 13b does not turn over.

FIG. 8 shows an example in which six connecting portions 13f are provided between the fin 13b and the base 13c as restraining portions for restraining the movement of the fin 13b between the fin 13b and the base 13c. It is. Therefore, even if water pressure is applied to the fin portion 13b of the U packing 13 to open the fin portion 13b outward, the fin portion 13b is unlikely to open outward, and the fin portion 13b
And the resistance of the inner surface of the bore 11b does not increase and the fin portion 13b
There is no curling.

[0033]

The present invention has the following effects.

(1) Since the fin on the sliding side of the U-packing is provided with a restraining portion for restraining the movement of the fin, even if water pressure or frictional resistance is applied so as to open the fin of the U-packing, the fin is not removed. Since the fin portion is not opened by the restraining portion to be restrained, the sealability is maintained, and the fin portion can be prevented from being turned up and causing a functional failure.

(2) Since the restraining portion is provided above the fin portion of the U packing, the structure is simple and easy to manufacture simply by providing the restraining portion continuously to the fin portion.

(3) Since the restraining portion is provided between the fin portion and the base portion of the U packing, the space between the fin portion and the base portion can be used, and the U packing does not become large.

(4) In a faucet provided with a resistance mechanism,
An annular U packing is provided to seal between the piston and the U packing. The U packing has a fin on the sliding side of the U packing provided with a restraining portion for restraining the movement of the fin, so that the fin of the U packing is opened. Even if water pressure and frictional resistance are applied to the fins, the fins are not opened by the restraining portion that restrains the fins, so that the sealing performance can be maintained, and the fins can be prevented from being turned up and causing a functional failure.

(5) Since a U-packing having a restraining portion provided above the fin portion of the U-packing is used, the structure is simple and easy to manufacture simply by providing the restraining portion continuously to the fin portion.
It can be easily incorporated into existing resistance mechanisms.

(6) Since a U-packing having a restraining portion provided between the fin portion and the base portion of the U-packing is used, a space between the fin portion and the base portion can be used, and the U-packing does not become large. It is easily integrated into the resistance mechanism.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a faucet of the present invention as a single lever type hot / water mixing faucet when a valve is closed.

FIG. 2 is a plan view in which a movable valve plate is overlaid on a fixed valve plate,
(A) of the same figure when the valve is closed, (b) of the same figure when the opening degree of the water side and the hot water side are the same, and (c) of the same figure when the water side only is fully opened. (D) of the figure shows the case where the flow path is fully closed from (c) of the figure.

FIG. 3 is a longitudinal sectional view of a housing structure excluding a main body.

FIG. 4 is a longitudinal sectional view of a main part showing a situation at the time of valve opening.

FIGS. 5A and 5B are views showing a first embodiment of the U-packing, wherein FIG. 5A shows a plan view and FIG. 5B shows a side view.

FIGS. 6A and 6B are views showing a use state of the U-packing of the first embodiment, wherein FIG. 6A is a longitudinal sectional view of a main part showing a situation at the time of valve opening, and FIG. Shows longitudinal sectional views of a main part showing a situation at the time of valve closing.

FIGS. 7A and 7B are diagrams showing a second embodiment of the U-packing, wherein FIG. 7A is a plan view and FIG. 7B is a side view.

FIGS. 8A and 8B are diagrams showing a third embodiment of the U-packing, wherein FIG. 8A is a plan view and FIG. 8B is a side view.

9A and 9B are views showing a usage state of a conventional U-packing, in which FIG. 9A is a longitudinal sectional view of a main part showing a situation when the valve is opened, and FIG. 1 is a longitudinal sectional view of a main part showing the situation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 1a Water discharge pipe 2 Outer shell material 3 Main body block 4 Cover block 5a Water supply pipe 6 Housing 7 Fixed valve plate 8 Movable valve plate 9 Operating member 9a Operating shaft 10 Guide ring 11 Operating block 11b Bore 11c Groove 12 Piston 13 U packing 13a Shoulder Part 13b fin part 13c base part 13d annular projection 13e projection 13f connecting part

Claims (6)

[Claims] 1. A U-packing, wherein a fin portion on the sliding side of the U-packing is provided with a restraining portion for restraining the movement of the fin portion. 2. The U-packing according to claim 1, wherein a restraining portion is provided above the fin portion. 3. The U-packing according to claim 1, wherein a restraining portion is provided between the fin portion and the base portion. 4. A body having a fluid inlet and an outlet, and a sliding fixed and movable valve plate disposed in a flow path between the inlet and the outlet, and actuating the movable valve plate. Operating means for opening and closing the flow path, a bore provided on the movable valve plate side and a piston which can be protruded and retracted from the bore, the bore communicates with the flow path, and the movable valve element is A faucet provided with a resistance mechanism capable of generating a resistance by discharging fluid in the bore to the flow path side when moving in the valve closing direction;
A water tap provided with a packing, wherein the U packing is provided with a restraining portion for restraining a movement of the fin portion on a fin portion on a sliding side of the U packing. 5. The faucet according to claim 4, wherein a cylindrical restraining portion is provided above the fin portion of the U packing. 6. The faucet according to claim 4, wherein a restraining portion is provided between the fin portion and the base portion.