JPH08120715A - Water delivery pipe of double pipe structure - Google Patents

Abstract

PURPOSE: To reduce a cost while increasing productivity by improving assembly workability of a pipe, in the water delivery pipe of double pipe structure having an inner pipe inside a water delivery pipe main unit. CONSTITUTION: A branch sleeve 62 is fitted from a point end opening side of a water delivery pipe main unit 56, and to rear end part of a cylindrical part 64 of the sleeve, a point end part of an inner pipe 52 is liquid-tightly fitted through an O ring 68. On the other hand, in the branch sleeve 62, a peripheral surface of the first water delivery pipe fitting part 78 is fitted to an internal surface of the water delivery pipe main unit 56, to provide a communication hole 86 in a position of upper half of this first water delivery pipe fitting part 78. Further from a point end part of the cylindrical part 64, the second water delivery pipe fitting part is extended out in an axial right angle direction, to fit this fitting part to an internal surface of the water delivery pipe main unit 56, also to bring a stopper part 90 into contact with a point end face of the water delivery pipe main unit 56, so as to regulate a fitting amount of the branch sleeve 62. From outside the branch sleeve 62, a water delivery pipe cap 24 is externally fitted, to prevent this cap from coming off by a guide member 110.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water discharge pipe having a double pipe structure having an inner pipe at the center of a water discharge pipe body.

[0002]

2. Description of the Related Art Conventionally, a water purifier is retrofitted to a discharge port at the tip of a water discharge pipe, and water discharged from the water discharge pipe is passed through the water purifier to be purified before use. On the other hand, the water purifier is installed at a position away from the water discharge pipe and at a hidden position,
The so-called built-in type water purifier that guides the water from the faucet body to the water purifier through the water conduit, purifies it here, and returns it to the faucet body again, and then discharges it from the outlet of the faucet through the water discharge pipe of the faucet. Is also widely used.

In this case, when the water purified by the water purifier is directly flown into the water discharge pipe, and the water is circulated inside the water discharge pipe and is then discharged from the discharge port at the tip, the purified water is purified by the water purifier. Mixes with the tap water remaining inside the discharge pipe, which causes a problem that the purity of the purified water is impaired. Therefore, it has been practiced to provide an inner pipe for independently passing only purified water inside the water discharge pipe.

Thus, when the inner pipe is inserted and arranged inside the water discharge pipe as described above, a metal cylindrical body is fixed to the tip end portion of the water discharge pipe body by brazing, and It is considered that the tip of the inner pipe is brazed and fixed in the fitted state, and then the water discharge pipe main body is covered with a cap, but in such a case, a great deal of labor is required for the assembly work. However, there is a problem that the cost is high.

[0005]

The invention of the present application has been made to solve such a problem. Thus, the invention of the present application is configured such that an inner pipe for forming a second main passage of the second liquid, which is independent of a main passage of tap water in the water discharge pipe main body, is inserted inside the water discharge pipe main body. In a water discharge pipe having a double pipe structure, (A) a member fitted into the water discharge pipe main body through an opening at the tip of the water discharge pipe main body, and (a) a liquid at the rear end of the inner pipe. It is closely fitted to form an extension passage inside the inner pipe that is continuous with the main passage for the second liquid inside the inner pipe, and the main passage of the tap water is provided between the outside of the pipe itself and the water discharge pipe body. A tubular portion that forms an extension passage, and (b) a plate-shaped or block-shaped rear side that extends in a direction perpendicular to the axis at the rear end of the tubular portion and that fits on the inner surface of the water discharge pipe body on the outer peripheral surface A first water discharge pipe fitting portion, and (c) is fitted into the water discharge pipe body at the front end opening position, A plate-shaped or block-shaped front-side second water discharge pipe fitting portion that closes the opening, (d) a tubular portion and a rear-side first water discharge pipe fitting portion, and a front-side second water discharge pipe fitting portion A connecting portion that connects the connecting portion to the front and the rear, and a communication hole that connects the main passage of the tap water and the extension passage is provided in the first water discharge pipe fitting portion, and the second discharge pipe is provided. The water pipe fitting portion is formed with a stopper portion that abuts on the tip end surface of the water discharge pipe body and defines an axial position with respect to the water discharge pipe body.
Further, a branch sleeve having an opening for discharging the second liquid on the tip side of the tubular portion, and (B) a bottomed tubular shape, which is fitted onto the tip portion of the water discharge pipe body. A water discharge pipe cap, and (C) the water discharge pipe main body and the water discharge pipe cap are fitted in a state of being inserted through a penetrating through hole provided at a lower portion of the water discharge pipe main body and the water discharge pipe cap, and are engaged with the branch sleeves. And the spout cap is removed,
And a guide member for guiding each liquid in the extension passage of the tap water and the extension passage of the second liquid to the discharge port formed by the water discharge pipe main body and the through hole of the water discharge pipe cap through its own guide passage. (Claim 1).

According to another invention of the present application, in the water discharge pipe of claim 1, the tubular portion of the branch sleeve extends to the second water discharge pipe fitting portion and is connected to the second water discharge pipe fitting portion. Thus, the tubular portion also serves as the connecting portion, and an opening for discharging the second liquid is formed in the lower portion of the tubular portion, and the guide member is inserted / engaged in the opening. The branch sleeve is prevented from coming off, an opening communicating with the inside of the tubular portion is formed in the second water discharge pipe fitting portion, and the water discharge pipe cap having the bottomed tubular shape is further provided. A plug body portion is provided at the center of the bottom portion so as to be fitted into the opening of the second water discharge pipe fitting portion to close the opening (claim 2).

In still another aspect of the present invention, in the water discharge pipe according to claim 1, the tip end surface of the tubular portion is located at a position rearward from the second water discharge pipe fitting portion by a predetermined distance. An opening for discharging the second liquid is formed in the tip end surface, and the first water discharge pipe fitting portion and the second water discharge pipe fitting portion are axially arranged at their outer peripheral portions. The guide member is extended and connected by a connecting arm as a connecting portion, and the guide member is inserted between the distal end of the tubular portion and the second water discharge pipe fitting portion to engage with the branch sleeve. (Claim 3).

Still another invention of the present application is the water discharge pipe according to claim 1, 2 or 3, wherein one of the second water discharge pipe fitting portion of the branch sleeve and the water discharge pipe cap is used for positioning in the rotational direction. One of the recesses is provided, and the other is provided with an engagement projection that engages with the recess, and the relative rotational direction positions of the branch sleeve and the water discharge pipe cap are defined based on their engaging action. (Claim 4).

According to a still further invention of the present application, in the water discharge pipe of claim 2, one of the second water discharge pipe fitting portion of the branch sleeve and the plug portion of the water discharge pipe cap is used for positioning in the rotational direction. One of the recesses is provided, and the other is provided with an engagement projection that engages with the recess, and the relative rotational direction positions of the branch sleeve and the water discharge pipe cap are defined based on their engaging action. (Claim 5).

Still another invention according to the present application is as follows.
In the water discharge pipe of 3, 4 or 5, the communication hole in the first water discharge pipe fitting portion is formed at the position of the upper half thereof, and the lower half has a closed structure (claim 6). ).

[0011] Still another invention of the present application is Claims 1, 2, 2
In the water discharge pipes 3, 4, 5 or 6, the second liquid is purified water obtained by purifying tap water with a purifier (claim 7).

[0012]

As described above, according to the first aspect of the present invention, first, the branch sleeve is fitted from the tip opening side of the water discharge pipe main body, and then the water discharge pipe cap is externally fitted to the water discharge pipe main body from the outside thereof. Further, a guide member is inserted into a through hole for forming a discharge port in the water discharge pipe main body and the water discharge pipe cap, and the guide member is engaged with the branch sleeve to prevent the branch sleeve and the water discharge pipe cap from coming off. .

In the water discharge pipe of the present invention, the second liquid sent through the inner pipe flows into the extension passage in the tubular portion of the branch sleeve, and then passes through the opening of the tubular portion and the guide passage of the guide member. It reaches the discharge port and is discharged to the outside from here.

On the other hand, tap water is sent inside the discharge pipe main body through the main passage outside the inner pipe, then flows into the extension passage outside the tubular portion through the communication hole, and further through the guide passage of the guide member. It reaches the discharge port and is discharged to the outside.

In the water discharge pipe of the present invention, the branch sleeve, the water discharge pipe cap, and the guide member are simply fitted into the inner surface of the water discharge pipe main body, the outer surface of the water discharge pipe main body, the water discharge pipe main body, and the through hole of the water discharge pipe cap in order. The main passage for the second liquid in the inner pipe, the passage for the second liquid from the main passage for tap water outside the inner pipe to the outlet, and the passage for tap water can be easily formed.

Therefore, according to the present invention, the water discharge pipe having the double pipe structure can be assembled very easily, and the cost can be kept low. Further, since the water discharge pipe has a double pipe structure, it is possible to favorably prevent the tap water and the second liquid from mixing inside the water discharge pipe.

According to a second aspect of the present invention, the tubular portion of the branch sleeve is extended to and connected to the second water discharge pipe fitting portion, and the tubular portion has the first water pipe fitting portion and the second water pipe fitting portion. The water discharge pipe fitting portion is also used as a connecting portion, and an opening for discharging the second liquid is formed in the lower portion of the tubular portion, and the guide member is inserted and engaged there. According to the present invention, the branch sleeve can have a simple structure and high strength.

The second water discharge pipe fitting portion of the branch sleeve may have a closed structure, but in the present invention, the second water discharge pipe fitting portion has an opening communicating with the inside of the tubular portion. It is formed and is closed by a plug portion provided at the bottom of the water discharge pipe cap.

In this case, by using the plug portion, the branching sleeve and the water discharge pipe cap can be easily provided with the positioning mechanism for defining the relative rotation direction position. That is, one of the second water discharge pipe fitting portion and the plug body portion of the branch sleeve is provided with a positioning recess, and the other is provided with an engaging projection, and based on their engaging action, the branch sleeve and the water discharge pipe cap are provided. And can be positioned in the direction of rotation (claim 5).

Thus, when the branch sleeve and the discharge pipe cap are provided with the positioning mechanism for defining the position in the rotation direction, the branch sleeve is fitted in the discharge pipe main body.
By fitting the water discharge pipe cap from the outside and rotating and moving the water discharge pipe cap to the proper position in that state, the branch sleeve inside the water discharge pipe body can be automatically rotated to the proper position (claim 4).

According to a third aspect of the present invention, the distal end of the tubular portion of the branch sleeve is located at a position separated from the second water discharge pipe fitting portion by a predetermined distance, and the distal end face has an opening for discharging the second liquid. On the other hand, the first water discharge pipe fitting portion and the second water discharge pipe fitting portion are connected by a connecting arm, and between the tip of the tubular portion and the second water discharge pipe fitting portion. According to the present invention, the guide member can be easily engaged with the branch sleeve while the branch sleeve is fitted inside the water discharge pipe body. You can

Also in the third aspect of the invention, it is desirable to provide the branch sleeve and the water discharge pipe cap with a positioning mechanism for defining the position in the rotational direction. In this case, the same effect as described above is obtained. can get.

According to a sixth aspect of the present invention, a communication hole that connects the main passage of the tap water and the extension passage is provided at an upper half position of the first water discharge pipe fitting portion, and the first water discharge pipe fitting is provided. According to the present invention, the second half sent through the passage in the tubular portion of the inner pipe and the branch sleeve has a lower half in the first water discharge pipe fitting portion. It is possible to prevent the water from entering the water discharge pipe body through half.

The inventions of claims 1 to 6 are particularly effective when applied to the case where the water purified by the water purifier flows out through the inner pipe of the water discharge pipe.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 2, reference numeral 10 denotes a single lever type hot and cold water mixing faucet attached to the counter 12, which has a faucet body 14, and water and hot water are supplied to the faucet body 14 from a water supply pipe 16 and a hot water supply pipe 18. It is supposed to be done. The supplied water and hot water are mixed here, flow inside the water discharge pipe 20, and are discharged from the discharge port 22 at the tip thereof. still,
Reference numeral 24 is a heat insulating cap made of resin as a water discharge pipe cap.

As shown in FIG. 3, the faucet body 14 is a metallic member having a generally cylindrical shape, and the inside thereof is divided into a plurality of partitions. An inflow side water passage 26 and an inflow side hot water passage 28 are formed vertically in the faucet body 14 by the partition wall.

The water and hot water supplied to the faucet body 14 through the water supply pipe 16 and the hot water supply pipe 18 flow upward in the water passage 26 and the hot water passage 28, and the single lever 3
Based on the operation of 0, after the water and hot water are mixed at a predetermined ratio by the valve portion 32 provided on the upper part of the faucet body 14,
It reaches the outflow side passage 34, further flows out from the outlet 36 into the inside of the water discharge pipe 20, is sent through the inside of the water discharge pipe 20, and is discharged to the outside from the discharge port 22 at the tip thereof.

In FIG. 2, reference numeral 38 denotes a water purifier provided at a position away from the faucet 10 for purifying tap water.
A pair of conduits 40, 42 extend from this water purifier 38. One conduit 40 is connected to a supply passage 44 (see FIG. 3 (B)) formed inside and under the faucet body 14, and the other conduit 42 is also connected to the faucet body 14.
Is connected to a purified water passage 46 formed inside and at the bottom. The supply passage 44 and the purified water passage 46 are partitioned by a partition wall.

The supply passage 44 is disposed adjacent to the inflow side water passage 26 and is partitioned by a partition wall.
Thus, an opening 48 is formed in the partition wall that divides the supply passage 44 and the water passage 26, and the opening 48 is opened and closed by the opening / closing valve 50. Here, the opening / closing valve 50 is advanced and retracted by screw feeding in the axial direction based on the rotation operation of the handle 51, thereby opening / closing the opening 48.

In this embodiment, the valve 32 is closed by operating the single lever 30, and the on-off valve 5 is closed.
When 0 is opened, the water passage 26 is passed through the water supply pipe 16.
The water sent therein flows into the supply passage 44 through the opening 48 and is sent to the water purifier 38 through the conduit 40. Then, the tap water is purified here and then sent into the water purification passage 46 inside the faucet body 14 through the conduit 42.

Inside the water discharge pipe 20, as shown in FIG. 3, an inner pipe 52 that allows only the purified water purified by the water purifier 38 to circulate alone is inserted and arranged, and its base end is the above-mentioned. It is connected to the outlet 54 of the water purification passage 46 inside the faucet body 14.

FIG. 1 shows the structure of the tip of the water discharge pipe 20. In this figure, reference numeral 56 is a water discharge pipe main body, in which an inner pipe 52 is inserted and arranged, and inside the inner pipe 52,
A main passage 58 for the purified water is formed. The inner pipe 52
Outside the pipe and inside the discharge pipe body 56, the main passage 6 for tap water is provided.
0 is formed.

A branch sleeve (made of resin in this example) 62 is inserted into the tip of the water discharge pipe main body 56 from the opening side, and the heat insulating cap 24 is externally attached to the water discharge pipe main body 56 from the outside. It is fitted. Branch sleeve 62
Has a cylindrical tubular portion 64 located at the center of the water discharge pipe main body 56. The tubular portion 64 has therein an extension passage 7 for purified water that is continuous with the main passage 58 in the inner pipe 52 inside.
4 and an extension passage 76 continuous to the main passage 60 of the tap water is formed on the outside thereof, and the tip end portion of the inner pipe 52 is fitted into the rear end portion thereof.

Here, the tip portion of the inner pipe 52 has an O-ring groove 6
It is fitted to the inner peripheral surface of the cylindrical portion 64 via an O-ring 68 mounted on the No. 6 and is watertightly sealed between them. An O-ring groove 70 is also formed in the water discharge pipe main body 56, and an O-ring 72 is attached to the O-ring groove 70. The fitting portion between the water discharge pipe main body 56 and the heat insulating cap 24 is water-tightly sealed by the O-ring 72. ing.

A first water discharge pipe fitting portion 78 extends from the rear end portion of the tubular portion 64 in a direction perpendicular to the axis, and a second water discharge pipe fitting portion 80 extends from the front end portion. It extends at right angles. The first water discharge pipe fitting portion 78 has a plate-shaped portion 82 in the direction perpendicular to the axis and a short cylindrical portion 84 extending in the axial direction at the outer peripheral end thereof, and the outer peripheral surface of the cylindrical portion 84 is the water discharge pipe. It is fitted to the inner surface of the main body 56.

A communication hole 86 is formed in the upper half of the first water discharge pipe fitting portion 78, and the main passage 60 and the extension passage 76 of the tap water are formed by the communication hole 86.
And are in communication. The first spout pipe fitting portion 78
The lower part of is a closed structure.

On the other hand, the second water discharge pipe fitting portion 80 has a plate-like portion 88 extending in the direction perpendicular to the axis, and is fitted to the inner surface of the water discharge pipe main body 56 on the outer peripheral surface thereof. A stopper portion 90 further extends outward in the direction perpendicular to the axis from the front end of the plate-shaped portion 88, and the stopper portion 90 abuts on the front end surface of the water discharge pipe main body 56, whereby the discharge pipe of the entire branch sleeve 62 is discharged. The amount of fitting into the main body 56 is specified.

A circular opening 92 for discharging purified water is formed in the lower portion of the cylindrical portion 64. Further, the second water discharge pipe fitting portion 80 is formed with an opening 94 communicating with the inside of the tubular portion 64.

As is apparent from the above description, in this example, the tubular portion 64 extends to and is connected to the second water discharge pipe fitting portion 80, so that the tubular portion 64 is It also serves as a connecting portion that connects the one water discharge pipe fitting portion 78 and the second water discharge pipe fitting portion 80.

The heat insulating cap 24 is a resin-made cylindrical member having a bottom, and a plug portion 98 is formed at the center of the inner surface of the bottom portion 96 so as to project rightward in FIG. 1 (A). The tip of the plug body 98 is the second water discharge pipe fitting portion 8
It is fitted into the opening 94 of 0 and closes the opening. The plug body 98 has a hollow shape having a hollow portion 100 at the center, and the outer peripheral surface has a tapered shape.

An engagement protrusion 102 is formed on the outer peripheral surface of the plug portion 98 so as to project in the direction perpendicular to the axis, and the engagement protrusion 102 is provided in the second water discharge pipe fitting portion 80 of the branch sleeve 62. Is engaged in a recess 104 formed on the tip surface of the. The positions of the branch sleeve 62 and the heat insulating cap 24 in the rotational direction are defined based on the engaging action of the engagement projections 102 and the recesses 104.

The water discharge pipe body 56 and the heat insulating cap 24
Through holes 106 and 108 for forming the discharge port 22 are provided in the lower portion of the lower part of the branch sleeve 62 and below the opening 92 of the branch sleeve 62.
The guide member 110 is inserted through the lower side from 108, and the guide member 110 is inserted inside the opening 92 of the tubular portion 64 of the branch sleeve 62. Here, the guide member 110 is inserted up to a position where the upper end contacts the inner surface of the tubular portion 64.

The opening 92 in the tubular portion 64, the water discharge pipe body 56, the through holes 106 in the heat insulating cap 24,
Reference numerals 108 are substantially the same as the dimension in the direction perpendicular to the axis of the guide member 110. By inserting the guide member 110, the branch sleeve 62 and the heat insulating cap 24 are pulled out from the water discharge pipe body 56 and the inner pipe 52. It has been stopped.

The guide member 110 has four blade pieces 112 intersecting in a cross shape as clearly shown in FIG. 4, and the purified water and tap water are discharged between the blade pieces 112. It has a guide passage 114 leading to. Further, each blade piece 112 is formed with a notch 116 extending downward from each upper end surface thereof. The guide member 110 includes the branch sleeve 62 and the heat insulating cap 24.
It also has the function of regulating the flow of purified water and tap water and guiding them to the discharge port 22.

On the lower side of the guide member 110, a rectifying member 118 having a ring shape and a corrugated transverse cross section is arranged, and further below the guide member 110, a ring packing 120 shown in FIG. The rectifying mesh 122 is disposed on the outer peripheral surface of the heat insulating cap 24, and the discharge port cap 124 is screwed and fixed to the outer peripheral surface of the cylindrical portion of the heat insulating cap 24 from below.

In the water discharge pipe 20 of this example, the purified water introduced into the main passage 58 inside the inner pipe 52 is divided into the branch sleeve 62.
After flowing into the extension passage 74 in the tubular portion 64 at
Through the notch 116 of the guide member 110, the guide member 110
Of the rectifying member 11 after flowing into the guide passage 114 of the
8. It is rectified by the rectification network 122 and discharged from the discharge port 22 to the outside.

The tap water sent inside the water discharge pipe 20 through the main passage 60 outside the inner pipe 52 flows into the extension passage 76 through the communication hole 86 in the branch sleeve 62, and further the tubular portion 64. Is flowed into the guide passage 114 of the guide member 110, and flows downward through the guide passage 114, and then is discharged from the discharge port 22 through the flow regulating member 118 and the flow regulating net 122.

Next, the procedure for assembling the water discharge pipe 20 of this embodiment will be described. First, the branch sleeve 62 is fitted from the end opening side of the water discharge pipe main body 56, and then the heat insulating cap 24 is water-tightly fitted on the water discharge pipe main body 56 via the O-ring 72. When the heat insulating cap 24 is rotated to some extent in this state, the engaging projection 102 of the heat insulating cap 24 and the branch sleeve 6 are in the middle of the rotation.
The recess 104 on the second side is engaged, and then the heat insulating cap 24
When you rotate them, they will rotate together.

Therefore, when the heat insulating cap 24 is positioned at the proper position, the branch sleeve 62 is automatically positioned at the proper position. In this state, the branch sleeve 62
The opening 92 of the tubular portion 64 and the through hole 108 in the heat insulating cap 24 in FIG.
Match 6 exactly.

In this state, the guide member 110 is inserted from below into the through hole 108 of the heat insulating cap 24 and the through hole 106 of the water discharge pipe main body 56 from below, and this is further inserted into the tubular portion 64 of the branch sleeve 62. Insert into the inside of the opening 92. Thus, at the time when the guide member 110 is inserted, the branch sleeve 62 and the heat insulating cap 24 are attached to the water discharge pipe main body 56.
And the inner tube 52 is prevented from coming off.

Thereafter, with the straightening member 118, the packing 120, and the straightening net 122 set under the guide member 110, the discharge port cap 124 is screwed in to complete the assembly of the water discharge pipe 20.

As described above, in this embodiment, the branch sleeve 62 is first fitted into the water discharge pipe main body 56, and then the heat insulating cap 24 is fitted therein, and then the guide member 1 is inserted.
10, the rectifying member 118, the packing 120,
The tip end portion of the water discharge pipe 20 can be easily assembled simply by fitting the discharge port cap 124 through the flow straightening net 122, and the cost can be kept low because each member is an inexpensive member.

In this example, the communication hole 86 in the first water discharge pipe fitting portion 78 of the branch sleeve 62 is provided only in the upper half position, and the lower portion of the first water discharge pipe fitting portion 78 is Because of the closed structure, the purified water sent through the extension passage 74 in the inner pipe 52 and the branch sleeve 62 flows out from the opening 92, and even if it goes around the lower side of the rear cylindrical portion 64 in the right direction in the drawing, It cannot pass through the lower half of one spout pipe fitting portion 78, and therefore will not mix with tap water remaining in the spout pipe body 56.

FIG. 5 shows another embodiment of the branch sleeve. As shown, the branch sleeve 12 of this example
In No. 6, the tubular portion 64 is shortened, and its tip end surface is located at a position apart from the second water discharge pipe fitting portion 128.
An opening 92 for discharging purified water is formed on the tip surface thereof.

In this branch sleeve 126, the first water discharge pipe fitting portion 78 and the second water discharge pipe fitting portion 128 are
The outer peripheral portion is connected by a connecting arm 130 extending in the axial direction.

The second discharge pipe fitting portion 128 is not formed with the opening 94 as in the first embodiment,
It is a closed structure as a whole. A recess 132 for positioning is provided on the front surface thereof, and an engaging projection 134 formed on the heat insulating cap 24 side is engaged with the recess 132, thereby rotating the branch sleeve 126 and the heat insulating cap 24. The position in the direction is specified.

In the case of the branch sleeve 126 of this example, the guide member 110 is provided with the tip of the tubular portion 64 and the second water discharge pipe fitting portion 1.
28, and is engaged with the branch sleeve 126. Based on the engagement, the branch sleeve 126 is prevented from coming off the water discharge pipe main body 56 and the inner pipe 52.

According to this example, the guide member 110 can be easily engaged with the branch sleeve 126 in a state where the branch sleeve 126 is fitted inside the water discharge pipe body 56.

Although the embodiment of the present invention has been described in detail above, this is merely an example. For example, in the present invention, the shape of the recess 104 and the engaging projection 102 for positioning the branch sleeve 62 and the water discharge pipe cap 24 in the rotational direction can be various shapes other than the above example, and the recesses can be formed. 10
4 and the position of the engaging protrusion 102 are reversed between them, that is, the engaging protrusion is provided on the side of the branch sleeve 62,
It is also possible to form a recess on the side of the water discharge pipe cap 24.

Further, the branch sleeve can be formed in various forms other than the above example, and in the above example, the inner pipe 5 is used.
Although the water purified by the water purifier 38 is allowed to pass through the inside of the device 2, it is also possible to cause an alkaline ionized water or other liquid to circulate and to discharge it from the discharge port 22 at the tip of the water discharge pipe 20 in some cases. is there. Others The present invention can be configured in a form in which various changes are made without departing from the spirit of the invention.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part for explaining the configuration of a water discharge pipe having a double pipe structure that is an embodiment of the present invention.

FIG. 2 is an overall view showing a hot and cold water mixing faucet having the water discharge pipe of FIG. 1 together with a water purifier.

FIG. 3 is a partially cutaway cross-sectional view for showing distribution paths of hot water, water, and purified water of the hot and cold water mixing faucet in the embodiment.

FIG. 4 is a perspective view of a guide member and a rectifying member in the embodiment.

FIG. 5 is a perspective view of a branch sleeve according to another embodiment of the present invention.

[Explanation of symbols]

 20 Water Discharge Pipe 22 Discharge Port 24 Insulation Cap (Water Discharge Pipe Cap) 38 Water Purifier 52 Inner Pipe 56 Water Discharge Pipe Main Body 58,60 Main Passage 62,126 Branch Sleeve 64 Cylindrical Part 74,76 Extension Passage 78 78 First Discharge Pipe Fit Joint part 80,128 Second water discharge pipe fitting part 82,88 Plate-like part 86 Communication hole 102,134 Engagement protrusion 104,132 Positioning concave part 106,108 Through hole 130 Connection arm

Claims (7)

[Claims] 1. A double pipe formed by inserting an inner pipe for forming a second main passage of a second liquid therein, which is independent of a main passage of tap water in the water discharge pipe main body. In a water discharge pipe having a structure, (A) a member fitted into the water discharge pipe main body through an opening at the tip of the water discharge pipe main body, and (a) liquid-tightly fitted at the rear end to the front end of the inner pipe. An extension passage is formed inside itself that is continuous with the main passage for the second liquid inside the inner pipe, and an extension passage for the main passage of the tap water is formed between the outside of itself and the water discharge pipe body. And (b) a first plate-shaped or block-shaped rear side that extends in the direction perpendicular to the axis at the rear end of the cylindrical portion and that fits on the inner surface of the water discharge pipe body at the outer peripheral surface. The water discharge pipe fitting portion and (C) are fitted into the water discharge pipe body at the front end opening position of the water discharge pipe body, and A plate-shaped or block-shaped front side second water discharge pipe fitting portion, (d) those tubular portions and a rear side first water discharge pipe fitting portion, and a front side second water discharge pipe fitting portion And a connecting portion that connects the portion to the front and rear, and the first water discharge pipe fitting portion is provided with a communication hole that connects the main passage of the tap water and the extension passage, and the second water discharge pipe. The fitting portion is formed with a stopper portion that abuts on the tip end surface of the water discharge pipe body and defines an axial position with respect to the water discharge pipe body. Further, the tubular portion is for discharging the second liquid at the tip end side. And (B) a water discharge pipe cap which is in the form of a cylinder with a bottom and which is fitted over the tip of the water discharge pipe body, and (C) the water discharge pipe body and the water discharge pipe cap. It is fitted in a state where it is inserted through a through hole provided in the part and is engaged with the branch sleeve. Therefore, the branch sleeve and the discharge pipe cap are prevented from being pulled out, and each liquid in the extension passage of the tap water and the extension passage of the second liquid is introduced into the discharge pipe body and the through hole of the discharge pipe cap through its own guide passage. A discharge pipe having a double pipe structure, which includes a guide member that is guided to a discharge port formed as described above. 2. The water discharge pipe according to claim 1, wherein the tubular portion of the branch sleeve extends to the second water discharge pipe fitting portion and is connected to the second water discharge pipe fitting portion. The tubular portion also serves as the connecting portion, and an opening for discharging the second liquid is formed in a lower portion of the tubular portion, and the guide member is inserted / engaged in the opening to branch the sleeve. Is retained, an opening communicating with the inside of the tubular portion is formed in the second water discharge pipe fitting portion, and further in the center of the bottom portion of the bottomed tubular water discharge pipe cap. A water discharge pipe having a double pipe structure, characterized in that a plug portion which is fitted into the opening of the second water discharge pipe fitting portion and closes the opening is provided. 3. The water discharge pipe according to claim 1, wherein the tip end surface of the tubular portion is located at a position rearward from the second water discharge pipe fitting portion by a predetermined distance, and the tip end surface has An opening for discharging the second liquid is formed, and the first water discharge pipe fitting portion and the second water discharge pipe fitting portion extend in the axial direction at their outer peripheral portions, as a connecting portion. The guide member is connected by a connecting arm, and the guide member is inserted between the tip of the tubular portion and the second water discharge pipe fitting portion and engaged with the branch sleeve. A water discharge pipe with a double pipe structure. 4. The water discharge pipe according to claim 1, 2, or 3,
One of the second water discharge pipe fitting portion and the water discharge pipe cap in the branch sleeve is provided with a concave portion for positioning in the rotational direction, and the other is provided with an engagement protrusion for engaging with the concave portion. A water discharge pipe having a double pipe structure in which a relative rotational position between the branch sleeve and the water discharge pipe cap is defined based on an engaging action. 5. The water discharge pipe according to claim 2, wherein one of the second water discharge pipe fitting portion of the branch sleeve and the plug body portion of the water discharge pipe cap is provided with a recess for rotational positioning. On the other hand, an engagement projection which engages with the recess is provided, and the relative rotational position between the branch sleeve and the water discharge pipe cap is defined based on the engagement action of the engagement projections. Water pipe. 6. The water discharge pipe according to claim 1, 2, 3, 4 or 5, wherein the communication hole in the first water discharge pipe fitting portion is formed at an upper half position thereof, and the lower half has a closed structure. The water discharge pipe has a double-pipe structure. 7. The double pipe according to claim 1, 2, 3, 4, 5 or 6, wherein the second liquid is purified water after purifying tap water with a water purifier. Structure water pipe.