JPH0913447A - Water tap - Google Patents

Abstract

PURPOSE: To reduce a cost required for a whole water tap in which a cylindrical part of a base end part of a drain pipe is turnably fitted for assembly to an outer circumferential surface of the whole water tap. CONSTITUTION: A U-packing 84 to seal a space between a water tap body 28 and a cylindrical part 20 of a base end part of a drain pipe 14 to be watertight is fitted in an inserting manner, a holding recessed part 80 is formed of recessed shape on the inner circumferential surface side of the cylindrical part 20 and outwardly in the radial direction, and the U-packing 84 is fitted thereto. The water tap body 28 is a formed article made of resin, and a seal surface in contact with the U-packing 84 and an upper surface successive thereto are straight surface parallel to an axis. In die forming the water tap body 28, a formed body is released parallel to the axis to leave no parting line on the seal surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a faucet, and more particularly, to a structure of a seal portion in a faucet in which a cylindrical portion of a water discharge pipe base end portion is fitted and assembled to an outer peripheral surface of a faucet body. With respect to.

[0002]

2. Description of the Related Art As a type of faucet, there is a faucet body having a water passage inside, and a cylindrical portion at a base end portion of a water discharge pipe is fitted and assembled to a faucet body for kitchen use. It is used as a water faucet. FIG. 7 shows an example. In the figure, reference numeral 200 denotes a water discharge pipe, which has a cylindrical portion 204 at a base end portion of a cylindrical main body portion 202, and an inner peripheral surface of the cylindrical portion 204 corresponds to an outer peripheral surface of the faucet main body 205. ,
It is fitted so as to be rotatable and slidable via a U packing 206 as a seal member.

The U-packings 206 are arranged in two places, upper and lower, and a main body side water discharge passage 208 is formed on the outer peripheral surface side of the faucet main body 205 between them. Further, the water discharge pipe 200 connects the water discharge pipe water passage 212 inside with the communication port 2
It is fitted and assembled to the faucet body 205 in a state of communicating with the body-side water discharge passage 208 via 10.

Here, the main body side water discharge passage 208 is the faucet main body 2
The water discharge pipe 200 is rotatable within a range in which the inner water discharge pipe passage 212 is kept in communication with the main body side water discharge passage 208. There is.

Reference numeral 214 is a lever as an operating portion,
By operating this lever 214, the water and the hot water sent upward in FIG. 7 through the pair of water and hot water supply passages 216 are mixed at the mixing section (not shown), and then through the downstream delivery passage 220. The water is sent to the main body side water discharge passage 208, flows through this, and flows out to the water discharge pipe water passage 212 inside the water discharge pipe 200.

In this faucet, as shown in the partially enlarged view of FIG. 7, an annular groove 222 is formed on the outer peripheral surface of the faucet body 205 so as to be recessed radially inward over the entire circumference. The U-packing 206 is fitted and held therein in such a manner that it is in sliding contact with the bottom surface of the annular groove 222 and the inner peripheral surface of the cylindrical portion 204 of the water discharge pipe 200.

[0007]

Conventionally, this faucet body 2
No. 05 was made of cast metal, and the annular groove 222 for the U packing 206 was formed by machining (post-processing) after casting. However, in this way the faucet body 2
When 05 is made of a cast material, the post-processing for forming the annular groove 222 is costly in combination with the high cost.

Therefore, it is considered that the faucet body 205 is made of a resin material, more specifically, a resin molded product. In this case, the cost of the faucet body 205 can be reduced, but even when the faucet body 205 is made of a resin mold product, the annular groove 222 for the U packing 206 is formed in the above-described form. As long as the post-processing for the annular groove 222 is required after the molding.

When the faucet body 205 is molded by molding, it is possible to simultaneously mold the concave annular groove 222. However, the annular groove 2 is concave inward in the radial direction.
It is necessary to use split molds in the left-right direction in the figure in order to mold 22, and the mating surfaces of these split molds, that is, the annular groove 2
A parting line remains in a convex shape on the radial bottom surface of 22. When such a parting line remains,
When the U packing 206 is attached, a leak occurs at the parting line.

Therefore, even when the faucet body 205 is molded with resin, post-processing for the annular groove 222 is necessary. However, if the annular groove 222 is post-processed, an additional cost is required, and the advantage of using the water faucet body 205 as a resin molded product is diminished.

[0011]

The invention of the present application has been made to solve such a problem. Thus, the invention of the present application is such that a water discharge pipe having a water discharge pipe main body portion, a water discharge port at the tip end portion, and a cylindrical portion at the base end portion is fitted to the outer peripheral surface of the faucet body at the cylindrical portion. In addition to assembling, an annular holding recess is formed in the fitting portion between the cylindrical portion and the faucet body, and a sealing member that seals between the cylindrical portion and the faucet body in a watertight manner is attached to the holding recess. In the water faucet of the above-mentioned form, a holding recess is formed on the inner peripheral surface of the cylindrical portion so as to be recessed radially outward, and the sealing member is fitted into the holding recess, and the sealing member is attached to the water. It is characterized in that it is brought into contact with the outer peripheral surface of the stopper body in a watertight manner (Claim 1).

According to another invention of the present application, in claim 1, the cylindrical portion has a water passage inside the water discharge pipe formed inside the cylindrical portion with respect to the faucet body. It is rotatable about the axis of the water faucet body in a state of being communicated with the water faucet body (claim 2).

[0013]

As described above, according to the first aspect of the present invention, the holding concave portion is formed not in the faucet body side but in the radial outer direction on the inner peripheral surface side of the cylindrical portion of the water discharge pipe. According to the present invention, when the faucet body is made of resin, post-processing for holding recesses is performed by a faucet. Since it is not necessary to apply it to the main body, the faucet main body can be manufactured at low cost.

The present invention provides a faucet in which the cylindrical portion is rotatable around the faucet body in a state where the water passage inside the discharge pipe communicates with the passage of the mixed water formed inside the cylindrical portion. It is suitable for application (Claim 2).

In the present invention, the faucet body is a resin molded product, and the faucet body is provided with a sealing surface at a portion abutting the sealing member on the outer peripheral surface of the faucet body and the faucet following the sealing surface. The surface of the main body continuing from the molding die may be located on the extension surface of the sealing surface or on the inner side in the radial direction. In this case, the faucet main body can be easily molded. At the same time, the sealing surface can be formed as a smooth surface at the same time when the faucet body is formed. That is, a good sealing surface that does not leak when the sealing member is brought into contact can be formed at the same time when the faucet body is formed.

Further, in the present invention, the cylindrical portion of the water discharge pipe is a resin molded product, and the radial bottom surface of the holding recess and the inner peripheral surface of the cylindrical portion are separated from the molding die. The surface continuing to the pulling-out direction (the surface continuing to the bottom surface) may be located on the extension surface of the bottom surface or radially outside, and in this case, the cylindrical portion can be formed at low cost. At the same time, when molding the cylindrical part, it can be easily released from the mold, and at the same time when the cylindrical part is molded, the bottom surface of the holding recess, that is, the sealing surface can be molded as a smooth surface. It is possible to improve the property.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the present invention is applied to a single lever type hot and cold water mixing faucet for a kitchen will be described in detail with reference to the drawings. In FIG. 3, 10 is a counter 12
It is a single-lever type hot and cold water mixing faucet installed above, and has a water discharge pipe 14. The water discharge pipe 14 is a tubular body 16
And a water outlet 18 at the tip end and a cylindrical portion 20 at the base end. In the cylindrical portion 20, the faucet body 28
On the other hand, it is rotatably fitted and assembled around its axis (see FIG. 1).

Reference numeral 22 denotes an operating lever. By vertically rotating the lever 22 in the P direction in FIG. 3, water discharge, water stoppage, and water discharge amount adjustment are performed, and the lever 22 is horizontally rotated in the Q direction. The mixing ratio of hot water and water is adjusted with.

As shown in FIG. 4, the counter 12
A pair of supply pipes 24 for supplying hot water or water to the faucet body 28 (FIG. 1) is disposed on the lower side. A check valve device 26 is provided on the supply pipes 24.

FIG. 1 shows a faucet 1 including an assembly structure of a water discharge pipe 14.
0 shows the internal structure of 0. In the figure, 28
Is a resin faucet body having a circular outer peripheral surface, and has a collar-shaped portion 30 protruding radially outward in an annular shape at the lower end portion,
The collar-shaped portion 30 is placed on a cylindrical pedestal member 34 provided upright on the counter 12 with an O-ring as a sealing member sandwiched between the collar-shaped portion 30 and the ring member 32.

Locking pawls 36 extend downward from the brim-shaped portion 30 at a plurality of circumferential positions (see FIG. 5), and the locking pawls 36 are formed on the outer peripheral surface of the upper end portion of the pedestal member 34. It is locked to the stepped part and is prevented from coming off.
Reference numeral 38 denotes a lower decorative cover, and this lower decorative cover 3
The ring member 32, the pedestal member 34, the locking claws 36, and the like are wrapped in the inside of 8.

Inside the faucet body 28, a pair of hot water and water supply passages 40 are formed so as to vertically penetrate therethrough, and the supply pipe 24 is connected to each of them.
The faucet body 28 is also provided with a delivery passage 42 for delivering the mixed water of hot water and water downward, and a main body side water discharge passage 44 for guiding the mixed water from the delivery passage 42 to the internal water passage of the water discharge pipe 14. ing.

The mixed water flowing into the main body side water discharge passage 44 is
The water flows into the internal passage 50 of the water discharge pipe 14 through the communication port 48 formed in the stopper ring 46 that defines the rotation range of the water discharge pipe 14. The communication port 48 formed in the stopper ring 46 is formed in a position and shape that allows the main body side water discharge passage 44 to communicate with the internal passage 50 of the water discharge pipe 14 within a predetermined rotation angle range of the water discharge pipe 14.

As shown in detail in FIG. 1, the resin cylindrical portion 20 at the base end portion of the water discharge pipe 14 is rotatable on the outer peripheral surface of the faucet body 28 on the inner peripheral surface thereof and about the axis thereof. Is fitted to. A resin branch pipe 52 extending obliquely upward is integrally formed with the cylindrical portion 20, and a metal pipe member 54 is inserted into the branch pipe 52 and a predetermined illustration is omitted. A joint member connects them to each other. In this example, the pipe member 54 and the branch pipe 52 constitute the tubular main body 16 of the water discharge pipe 14.

An upper decorative cover 56 is arranged above the cylindrical portion 20 of the water discharge pipe 14. A fixed valve body 58 made of a ceramic disk is fixedly provided inside the upper decorative cover 56 at the upper end of the faucet body 28, and a movable valve body provided with a movable ceramic disk 60 on the upper surface side thereof. 62 is arranged, and the respective faces of the ceramic discs in the respective valve bodies 58, 62 are slidably and watertightly contacted.

The movable valve body 62 is formed with a mixing chamber 64 which opens downward, and the fixed valve body 58 is supplied with hot water or hot water from the hot and cold water supply passage 40 into the mixing chamber 64. An inflow port 66 for allowing the mixed water from the mixing chamber 64 and an outflow port 68 for allowing the mixed water from the mixing chamber 64 to flow out into the delivery passage 42 are provided, and the inflow port 66 and the outflow port 68 are the movable valve body 62. As they move, they are connected or cut off from each other.

A position-fixed cylindrical member 70 and a rotating member 72 rotatable with respect to the cylindrical member 70 are arranged inside the upper decorative cover 56, and the engaging arm is engaged with the rotating member 72. 74 is connected to a pin 76 so as to be vertically rotatable.

Here, the engaging arm 74 is a cap 7 formed integrally with the base end portion of the lever 22 as the operating portion.
8, the engaging arm 74 is vertically movable integrally with the lever 22.

Further, the rotating member 72 rotates left and right integrally with the lever 22, so that as the lever 22 rotates up and down in the P direction in FIG. 3, the movable valve body 62 moves forward and backward in the left and right direction in FIG. 3, the movable valve body 62 rotates left and right on the fixed valve body 58 together with the rotating member 72.

The cylindrical portion 20 of the water discharge pipe 14 is shown in FIG.
As shown in the enlarged view, the holding recesses 8 are formed on the inner peripheral surfaces of the upper side portion and the lower side portion of the main body side water discharge passage 44.
0 and 82 are formed, and a U packing 84 as a seal member is fitted and held therein.

Here, the upper holding recess 80 is shown in FIGS.
As also shown in FIG. 3, the inner peripheral surface of the cylindrical portion 20 is directly formed by recessing the inner peripheral surface outward in the radial direction, and the lower holding concave portion 82 is formed on the inner peripheral surface of the cylindrical portion 20. The ring member 86 is indirectly formed on the lower side by fitting the ring member 86 into the radially outward stepped portion 85.

Thus, the holding recess 80 on the upper side is the cylindrical portion 2
0, specifically, an annular ring-shaped part 90 of the claw member 88 by the claw member 88 fitted in the upper end opening of the claw 0.
Is closed at its upper end, and the lower holding recess 82 is closed at its lower end by the flange 30 of the faucet body 28.

In the present example, the cylindrical portion 20 and the branch pipe 52 are made of a resin molded product, and the holding recess 8 is formed.
The radially outer bottom surface at 0, that is, the sealing surface by the U packing 84 and the upper surface subsequent thereto are the cylindrical portion 20.
Is a smooth surface that extends straight in a direction parallel to the axis of the.
The claw member 88 integrally has upward engaging claws at a plurality of circumferential positions, and these engaging claws are provided on the cylindrical member 70.
It is locked to the stepped portion at the lower end of the to prevent its removal (see FIG. 1).

On the other hand, the radially outer bottom surface of the lower holding recess 82, which is the sealing surface by the U packing 84, is also a smooth surface that extends straight in the direction parallel to the axis of the cylindrical portion 20. Further, the surface continuing to the lower side is a surface located on the outer side in the radial direction of the cylindrical portion 20.

That is, in this example, the holding recesses 80, 8
The sealing surface and the surface following it in 2 are shaped so that the cylindrical portion 20 as a molded product can be easily released from the molding die in the direction parallel to the axis, and when sealing the cylindrical portion 20, a seal is formed. The shape is such that no convex parting line is left on the surface.

On the other hand, the water faucet body 28 is also made of a resin molded product, and the sealing surface by the U packing 84 and the upper surface following the sealing surface are both continuous with the sealing surface and parallel to the axis. It is considered to be all over.

Therefore, the faucet body 28 can also be easily removed from the molding tool when it is molded by the molding tool, and at the same time, without leaving a convex parting line on the sealing surface. Can be formed into a smooth surface, and the sealing property can be improved.

Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention may be configured to have the holding recess for holding the U packing in various forms other than the above example. The present invention is possible, and the present invention can be appropriately applied to other faucets, and various modifications can be made without departing from the spirit of the invention.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a water faucet that is an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of a portion A in FIG.

FIG. 3 is a perspective view showing the water faucet of FIG. 1 installed on a kitchen counter.

FIG. 4 is a view showing a state in which a supply pipe is connected to the water faucet of FIGS. 1 and 3.

FIG. 5 is an exploded perspective view showing the faucet of FIGS. 1, 2 and 4 by disassembling it into respective parts.

FIG. 6 is a cross-sectional view showing the faucet of FIGS. 1, 3, and 4 in an exploded manner.

FIG. 7 is a view showing a conventional faucet together with a structure of a holding recess of a U packing.

[Explanation of symbols]

 14 Water Discharge Pipe 16 Main Body 18 Water Discharge Port 20 Cylindrical Part 28 Faucet Main Body 80, 82 Holding Recess 84 84 U Packing

Claims (2)

[Claims] 1. A water discharge pipe having a water discharge pipe main body portion, a water discharge port at a tip end portion, and a cylindrical portion at a base end portion is fitted to the outer peripheral surface of the faucet body at the cylindrical portion, An annular holding recess is formed in a fitting portion between the cylindrical portion and the faucet body, and a sealing member for watertightly sealing between the cylindrical portion and the faucet body is attached to the holding recess. In the faucet, a holding recess is formed on the inner peripheral surface of the cylindrical portion, which is recessed radially outward, and the sealing member is fitted into the holding recess, and the sealing member is attached to the outer circumference of the faucet body. A faucet characterized by being brought into watertight contact with the surface. 2. The method according to claim 1, wherein the cylindrical portion communicates with the faucet body a water passage inside the discharge pipe to a passage of mixed water formed inside the cylindrical portion. A faucet characterized by being rotatable around an axis of the faucet body.