JP2002081755A - Circulation port adapter and pipe coupling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circulation port where its structure is simple and compact, and construction is easy and it provides high safety, and provide the circulation port adapter where utilization efficiency of water in a bathtub is improved, and further provide a pipe coupling structure which ensures coupling with one touch. SOLUTION: A circulation port adapter is provided which includes a circulation coupling section 36, and first and second coupling pipe portions (26, 27) that form a plurality of passages at a predetermined angle. Further, a pipe coupling structure is constructed, including a first protruded portion (engaging protruded portion 130) and a second protruded portion (engagement guide portion 132) on a peripheral surface of an insertion pipe portion, and further including in a pipe section to be inserted (fitting coupling portion 72) an annular recessed portion (engaging recessed portion 142) and an insertion guide portion (insertion glide piece 140) for guiding demounting by the second protruded portion. The circulation port adapter ensures a simple structure, easy construction thereof, improved safety, and improved utilization efficiency of water in a bathtub, and the pipe coupling structure facilitates removal by one touch operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulating port adapter used for hot water supply to a bathtub, reheating circulation of bathtub water, water supply to a washing machine, and the like, and a pipe connection structure used for connecting a water pipe and the like.

[0002]

2. Description of the Related Art Conventionally, hot water supply to a bathtub and recirculation of bathtub water have been performed through a circulation port formed in a wall portion of the bathtub. When the bathtub water is reused for washing or the like, the circulation port is used. An external hose is connected to a circulating device attached to a tub to take out bathtub water.

Conventionally, a synthetic resin is used for a circulating component in a bathtub, but a screw formed in a connecting portion is used for connecting pipes.

[0004]

It is very troublesome to attach and detach parts other than the external hose for external water supply such as washing, and the attachment and detachment complicates the structure of the circulation port on the bathtub side. I do. In addition, if the protrusion in the bathtub becomes large, the bather will feel uncomfortable. In addition, it is desirable that the construction is easy for the person in charge of construction. In addition, when hot water is supplied, hot water spouts toward the bather, which causes discomfort and needs to be avoided in order to enhance safety. In addition, when additional water is supplied to the outside by reheating the bathtub water, it is necessary to remove scales and the like in the bathtub. In addition, the circulation port is formed at a position higher than the bottom of the bathtub, and when bathtub water is drawn in from the circulation port, bathtub water lower than the circulation port cannot be used. In addition, if the suction port and tap hole of the circulation port adapter are common, even if a filter that blocks scale is installed, the scale attached to the filter will be transferred to the bathtub side when tapping water when the direction of water flow changes with the suction of bath water. Return and cause discomfort.

Further, the use of a large number of screws in the connecting portion makes the connecting portion firm, but has the disadvantage that the screwing operation takes time and the construction time becomes long.

SUMMARY OF THE INVENTION Accordingly, it is a first object of the present invention to provide a circulation port adapter having a simple structure, a compact structure, easy construction, and high safety. A second object is to provide the same, and a third object is to provide a tube connection structure that enables one-touch connection.

[0007]

According to the present invention, a circulation connection (36), a plurality of passages (a suction passage 74 and a discharge passage 76) are provided.
Are formed at a predetermined angle.
27), and a first projection (locking projection 130) and a second projection (engagement guide) on the peripheral surface of the insertion tube (connection tube 26, 27). Part 132) and an annular concave part (locking concave part 14) in the inserted pipe part (fitting connection part 72).
2), a pipe coupling structure including an insertion guide portion (insertion guide piece 140) for guiding attachment and detachment by the second projection. The circulation port adapter has a simple structure, is easy to install, improves safety, and improves bath water use efficiency. The pipe connection structure facilitates easy attachment and detachment by one-touch operation.

The circulation port adapter according to the first aspect of the present invention is a circulation connection part (34) connected to a circulation pipe unit (34) for supplying hot water to the bathtub (30) or circulating water in the bathtub to the reheating circuit. 36) and a plurality of independent passages (suction passages 7) in a direction orthogonal to the water flow direction of the circulation pipe unit.
4. First and second forming the discharge passage 76) at a predetermined angle
Connecting pipe portions (26, 27),
And a branch pipe portion (24) which can be set and fixed in a desired direction. That is, the circulation connection unit is connected to the circulation pipe unit penetrating the circulation port of the bathtub. First and second connection pipes are formed in the branch pipe at a predetermined angle to form a plurality of independent passages at a predetermined angle in a direction perpendicular to the water flow direction of the circulation pipe unit. The branch pipe is connected to the circulation connection. Fix it. As a result, the first and second connecting pipe sections of the branch pipe section are connected to the circulation pipe unit, and a water passage is formed for each of the first and second connecting pipe sections. In this case, since the branch pipe can be fixed to the circulation connection at an arbitrary angle, the first and second connection pipes can be set in desired directions, and the direction of the water channel can be selected.

According to a second aspect of the present invention, the circulation port adapter is directly or indirectly connected to a circulation pipe unit (34) for supplying hot water to the bathtub (30) or circulating water in the bathtub to the reheating circuit. And a suction port (83, 8) connected to the branch pipe part for sucking water in the bathtub.
5) together with a main body (58) in which a discharge port (77) for discharging water from the circulation pipe unit side to the bathtub side is formed, and the suction port is closed and the suction port is closed when sucking the water. The valve means (valve elements 92, 9) which opens and discharges the water while opening the discharge port and closing the suction port.
4, 98). That is, the branch pipe is directly or indirectly connected to the circulation pipe unit, and the main body is connected to the branch pipe. The main body is provided with a discharge port and a suction port, and is provided with a valve means. When the water is sucked, the discharge port is closed and the suction port is opened. As a result of opening the outlet and closing the suction port, water can be selectively sucked or discharged from the main body, and the flow direction of the water can be switched by the switching operation of the valve means. In addition, when the discharge port and the suction port are separately configured and a filter is provided in the suction port, the scale that is blocked by the filter during suction does not return to the bathtub side when tapping out of the discharge port, and discomfort due to the scale occurs. Never.

According to a third aspect of the present invention, there is provided a circulation port adapter according to the present invention, wherein the suction port (83, 85) is connected to a lower portion of the branch pipe section (24) and arranged on the bottom side of the bathtub. 58). That is, the main body having the suction port is installed on the bottom side of the bathtub, and the bathtub water is suctioned from a low water level on the bottom side, with respect to the branch pipe portion installed on the circulation port side. In comparison, the efficiency of bath water reuse can be increased. Also,
Since the bathtub water can be filtered by the filter, the outflow of the scale can be prevented.

According to a fourth aspect of the present invention, there is provided a circulation port adapter according to the present invention, wherein the branch pipe portion and the main body portion are detachably attached to the branch pipe portion (24) or the main body portion (58) to expose a part thereof. A cover (2) to be covered and one or more cover pieces (20) detachably formed on the cover, and a window (2) formed by separating the cover piece.
In 2), a part of the branch pipe portion can be protruded. That is, most of the branch pipe portion and the main body portion are covered with the cover, and, for example, the distal end side of the connection pipe portion, which is a part thereof, is exposed from the cover. And this cover is formed with a detachable cover piece.
A window is formed by cutting off the cover piece, and a part of the branch pipe, for example, a connecting pipe for external water supply can be projected from the window. By connecting an external hose to this connecting pipe as required, bathtub water can be used for washing and the like.

According to a fifth aspect of the present invention, there is provided a pipe connecting structure for inserting an insertion pipe portion (connecting pipe portions 26 and 27) into an inserted pipe portion (fitting connection portion 72) and connecting them. An annular or arc-shaped first protrusion (locking protrusion 130) formed on the peripheral surface of the insertion tube portion, and the first protrusion in a direction orthogonal to the first protrusion. A second protrusion (engagement guide portion 132) formed at the same or equivalent height as an annular recess formed on the inner wall surface of the inserted tube portion and into which the first protrusion is inserted (An engaging recess 142) and a slit (138) at the opening of the inserted tube portion to separate the other portion from the other portion.
An insertion guide portion (insertion guide piece 1) to which the second protrusion is attached and detached.
40). That is, when the second protrusion of the insertion tube is aligned with the insertion guide of the tube to be inserted and the insertion tube is inserted into the tube to be inserted, the insertion guide formed to have a small diameter by the second protrusion. The portion is pushed open, and the first projection of the insertion tube fits into the recess of the inserted tube. In this state, by changing the circumferential position of the insertion guide portion of the inserted tube portion and the second projection of the insertion tube portion, the engagement state between the insertion guide portion and the second projection is released. As a result, the engagement is changed to the engagement between the recess and the first protrusion, and the insertion tube and the insertion tube are firmly connected. To release the connection between the two, the second insertion tube
The two projections can be removed by aligning the projection with the insertion guide of the inserted tube section and applying a tensile force between them.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to embodiments shown in the drawings.

1 and 2 show an embodiment of a circulation port adapter according to the present invention. FIG. 1 is a front view thereof, and FIG. 2 is a right side view thereof.

As shown in FIG. 1, this circulation port adapter is covered with an elliptical cover 2 as an exterior member, and a circular window 4 formed in the cover 2 has a suction section 6 for sucking bathtub water. The suction unit 6 is provided with a cap 8 which is detachable by rotation.
The cover 2 is formed with a projection 10 representing a fixed position and a triangular projection 12 as an indicating means for indicating a detached position of the cap 8, and an arrow-shaped indicating means for indicating the rotational position at the center of the cap 8. A protrusion 14 is formed. A plurality of suction ports 16 are formed radially in the cap 8, and a filter 18 made of a wire mesh or the like is attached to each suction port 16 as a filtering means.

A cover piece 2 is provided on the side of the cover 2.
A U-shaped window 22 is formed by removing 0, and the first connecting pipe 26 of the branch pipe 24 protrudes from the window 22. An external hose 28 is attached to the connecting pipe 26, and bathtub water discharged from the connecting pipe 26 is used for washing or the like.

As shown in FIG. 2, a circulating pipe unit 34 penetrating a circulating port 32 formed in a side wall of the bathtub 30 is provided with a circulating connecting portion 36 projecting from the rear surface of the circulating port adapter. And forms a circulation path together with the circulation connection pipe 40 penetrated through the circulation connection portion 36. That is, the circulation port adapter is connected to a hot water supply circuit, which is a hot water supply source (not shown), and is connected to a reheating circuit (not shown). Hot water is supplied to the bathtub 30 through the circulation port adapter, and recirculation of bathtub water is performed. Is performed.
In this circulation port adapter, the suction unit 6 is connected to the circulation port 3.
Since it is arranged so as to hang down below 2, that is, on the bottom side of the bathtub 30, bathtub water having a water level lower than the circulation port 32 can be sucked up, and the bathtub water recycling efficiency can be increased.

3 to 5 show the cover 2 of the circulation port adapter. FIG. 3 is a side view of the cover 2 before the cover piece 20 is separated, and FIG. 4 is a view before the cover piece 20 is separated. FIG. 5 is a rear view of the cover 2, and FIG. 5 is a sectional view taken along line VV of FIG.

A U-shaped cover piece 20 is formed on the upper side surface of the cover 2 so that the cover piece 20 can be separated to the left and right. The cover piece 20 has a narrow groove 42 and a through hole 4 around its periphery.
4 are formed and partitioned, and can be easily separated from the cover 2 by the thin wall and the through hole 44 by the groove portion 42. In the cover 2 of the circulation port adapter shown in FIGS. 1 and 2, the right cover piece 20 is cut off to form the window 22. A flange 43 is formed inside the circular window 4 formed on the front side of the cover 2. Further, a window 45 for discharging water is formed in a lower portion of the cover 2. In this embodiment, the window portion 45 is formed by an inclined cutout.

An engaging portion 46 for engaging with the branch pipe portion 24 is formed in the upper center of the rear surface of the cover 2.
A protruding wall portion 48 is formed. The engagement concave portion 46 is formed by a cylindrical projection, and a part of the branch pipe portion 24 is inserted and engaged therein. Further, a pair of gripping pieces 50 and 52 are provided on the rear surface of the cover 2 so as to engage with a part of the branch pipe part 24 with a projection wall 48 interposed therebetween as an engagement means. The gripping pieces 50 and 52 are formed integrally with the cover 2 formed of, for example, a synthetic resin, and have the elasticity of the synthetic resin. By making it slightly narrower, the branch pipe portion 24 can be firmly held between the holding pieces 50 and 52 by an appropriate elastic force. Thereby, the cover 2 is fixed to the branch pipe portion 24. In this embodiment, ribs 54 are formed to reinforce the gripping pieces 50 and 52 and the cover 2, and each rib 54 is formed higher than the thickness of the cover 2 as shown in FIG. A cutout recess 56 is formed in the upper edge of the window 4 to accommodate a connection between the main body and the branch pipe 24.

6 to 9 show an embodiment of the branch pipe section 24 and the main body section. FIG. 6 shows the branch pipe section 24 and the main body section, FIG. 7 shows a cross section taken along the line VII-VII of FIG. FIG. 8 shows an exploded structure of the main body, and FIG. 9 shows the cap and the main body.

As shown in FIG. 6, the circulation port adapter includes a branch pipe portion 24 inside the cover 2 and the branch pipe portion 24.
Is stored in the main body 58. Branch pipe section 2
4 is provided with a circular bowl-shaped fixing plate 60 as a means for fixing to the circulating connecting portion 36, and is inserted into the engaging concave portion 46 of the cover 2 at a branch portion of the connecting pipe portions 26 and 27, and An engagement projection 59 for engaging the branch pipe portion 24 is formed. In addition, the circulation connecting portion 36 is inserted into the back side of the fixed platen 60, and a cylindrical fitting protrusion 61 is provided on the back surface of the fixed platen 60 as shown in FIG. Numeral 61 is inserted into and fixed to the circulation connecting portion 36 with an O-ring 63 interposed in the small diameter portion. A plurality of through holes 62 are formed in the fixed plate 60 at angular intervals corresponding to the plurality of fixed portions of the circulation connection portion 36.
By tightening the fixing screw 64 from the
4 is firmly fixed.

As shown in FIG. 7, a circulating connection pipe 40 is provided at the center of the fixed plate 60 of the branch pipe section 24 on the rear side, and communicates with the circulating connection pipe 40. One connecting pipe portion 26 is formed, and a second connecting pipe portion 27 that is separated from the passage outside the circulating connecting pipe 40 in the connecting pipe portion 26 and communicates with the circulating pipe unit 34 is formed. The pipe portions 26 and 27 are formed at a predetermined angle, for example, an angle of 80 degrees. These connecting pipes 2
An O-ring 66 is attached to the distal end of each of the tubes 6 and 27 to connect the outer hose 28 and the main body 58 to the small diameter portion in a watertight state. In this embodiment, the connecting pipe 26 is opened and the main body 58 is connected to the connecting pipe 27 side.
6 so that the main body portion 58 can be attached to the connecting pipe portion 26, and the fixing plate 60
The main body 58 can be selectively connected to the connecting pipe 26 or the connecting pipe 27 by changing the mounting angle of. The connecting pipes 26 and 27 are cylindrical, and the fixed board 60 has cutouts 68 and 70 corresponding to the connecting pipes 26 and 27 in order to minimize overhang from the front side of the fixed board 60. Are formed, contributing to the compactness of the circulation port adapter.

The main body 58 has two separate passages in the fitting connecting portion 72 connected to the connecting pipe portion 27, a suction passage 74 used for sucking bath water in the bathtub 30, and a circulation connecting pipe. A discharge passage 76 used to flow the water on the 40 side into the bathtub 30 is formed, and the discharge passage 76 communicates with the discharge port 77. The main body 58 is closed by a front shield plate 82 fixed using a plurality of fixing protrusions 78 and screws 80, and the front shield plate 82 is formed with suction ports 83 and 85 communicating with a suction passage 74. , A through-hole 87 for passing through the screw 80 is formed.

Enclosure walls 84 and 86 are formed in the main body 58 to partition and separate the suction passage 74 and the discharge passage 76. On the suction passage 74 side, a valve body 92 and a pair of bearings 88 are formed by a pair of bearings 88. A valve element 94 is attached to be openable and closable by a portion 90, and a valve element 98 is attached to the discharge passage 76 side by an openable and closable pair of bearings 96. The valve bodies 92 and 94 have a plate-shaped valve plate 102 formed on a shaft portion 100 rotatably supported by bearings 88 and 90, and abut the front shield plate 82 so that the valve plate 1
A support piece 106 is formed as a support means for bringing the 02 into contact with the valve seat 104 formed on the suction passage 74 side.
The valve bodies 92 and 94 are made of, for example, rubber as an elastic material, and use the elasticity to make the valve plate 102 abut on the valve seat 104 with the support piece 106 to function as a normally closed valve except during suction. Then, at the time of suction, the valve plate 102
Moves away from the valve seat 104 to allow for water suction. At the time of discharge, the valve plate 102 is brought into pressure contact with the valve seat 104 by the discharge force, and the suction passage 74 is separated from the discharge passage 76.

Similarly, the valve element 98 also has a pair of bearing portions 9.
6, a plate-shaped valve plate 110 is formed on a shaft portion 108 rotatably supported by the valve seat 6, and the valve plate 110 is formed on the discharge passage 76 side against the front shield plate 82.
A pair of support pieces 114 are formed as support means for making contact with the support piece 12. The valve body 98 is also formed of rubber, for example, as an elastic material, and by using this elasticity, the valve plate 110 is brought into contact with the valve seat portion 112 with the support piece 114 to function as a normally closed valve except during discharge. Then, at the time of discharge, the valve plate 110 is separated from the valve seat portion 112 by utilizing the pressure of water, thereby enabling the discharge of water. At the time of suction, the suction force brings the valve plate 110 into pressure contact with the valve seat 112 side, and the discharge passage 76 is separated from the suction passage 74.

The bathtub 30 is provided on the back of the main body 58.
A support protrusion 116 is formed integrally with the main body 58 as a support means for abutting the inner wall of the bathtub 30 to maintain the main body 58 parallel to the inner wall of the bathtub 30. Also, the main body 58
A flange 118 is formed on the peripheral surface of the cover 2, and a locking projection 120 for locking the inside of the flange 43 on the window 4 side of the cover 2 is formed higher than the flange 118. A plurality of grooves 122 are selectively formed in the peripheral wall on the front side of the main body 58.
Is opened as an insertion portion 124 on the front side of the main body 58. On the other hand, a plurality of protrusions 126 to be engaged with the groove 122 are formed on the inner peripheral surface of the cap 8. That is, by aligning the projection 126 of the cap 8 with the insertion portion 124 of the main body 58, the cap 8 is put on the main body 58, the cap 8 and the main body 58 are rotated in opposite directions, and the projection 126 is formed into the groove 122. By moving the cap 8 to the end point, the cap 8 and the main body 58 can be connected.

Next, FIGS. 10 to 13 show an embodiment of the pipe connecting structure of the present invention, and FIG. 10 shows a connecting portion on the branch pipe portion 24 side.
FIG. 11 shows the connecting portion on the side of the main body 58, and FIGS. 12 and 13 show the attachment and detachment of both.

As shown in FIGS. 10 (A) and 10 (B), the connecting pipes 26 and 27 on the side of the branch pipe 24, which are insertion pipes, have a small diameter at the front end and a concave part in the middle thereof. An O-ring 66, which is a water-tight means, is fitted with 128.
An annular locking projection 130 is formed as a first projection at a position behind the recess 128, and a second projection is formed as a second projection in a direction orthogonal to the locking projection 130. Are selectively formed. The engagement guide portions 132 of this embodiment are formed at two locations in the diameter direction, and have the same height as the locking projections 130. Further, in this embodiment, the locking projection 130 is formed in an annular shape, but may be formed in an arc shape at a predetermined angular interval.

On the other hand, the main body portion 5 which is the inserted tube portion
As shown in FIGS. 11 (A) to 11 (C), the large-diameter portion 13 gradually increases in diameter toward the opening as shown in FIGS.
4, 136 are formed with a stepped portion, and a plurality of slits 138 are formed in the large-diameter portion 136, and as insertion guide means for guiding the insertion of the connecting pipe portion 26 or the connecting pipe portion 27,
A plurality of insertion guide pieces 140 having a small width are formed corresponding to the engagement guide portions 132. And in the large diameter part 136,
A locking recess 142 that engages with the locking projection 130 of the connecting pipe 26 or the connecting pipe 27 is formed. A tapered surface 144 for facilitating insertion of the connecting pipe portion 26 or the connecting pipe portion 27 is formed at an opening edge of the large-diameter portion 136.

With such a configuration, FIG.
And (B), the engagement guide portion 132 is aligned with the position of the insertion guide piece 140 to connect the connection pipe portion 26 or the connection pipe portion 2.
7 is pushed into the fitting connecting portion 72 in the direction of arrow A, the insertion guide piece 14 is moved by the engagement guide portion 132 in the direction indicated by arrow B.
0 is expanded, so that the connecting pipe portion 26 or the connecting pipe portion 27 becomes the end point of the fitting connecting portion 72, that is, the locking concave portion 14.
The engagement protrusion 130 is engaged with 2, and the connection pipe 26 or the connection pipe 27 is connected to the fitting connection 72. In this state, as shown in FIGS. 13C and 13D, when the connecting pipe portion 26 or the connecting pipe portion 27 is rotated a few degrees in the direction shown by the arrow C, the engagement guide portion 132 is moved to the slit 138. When inserted, the insertion guide piece 140 returns due to the elasticity of the synthetic resin,
The locking projection 130 of the connecting pipe portion 26 or the connecting pipe portion 27 is locked by the locking recess 142 of the fitting connecting portion 72, and the two are prevented from being separated.

In this state, the connecting pipe 26 or the connecting pipe 27 is rotated in the direction opposite to the arrow C to rotate the connecting pipe 26 or 27 in FIG.
And (B), the insertion guide piece 140 is pushed and spread in the direction of arrow B by the engagement guide section 132, and the connecting pipe section 26 or the connecting pipe section 27 is disengaged from the fitting connecting section 72. That is, by applying a force in the direction of arrow D, the two can be easily separated from each other.

The water flow operation of the circulation port adapter will be described with reference to FIGS. 14 to 16. When water is supplied from the circulation pipe unit 34 to the bathtub 30, as shown by arrows in FIG. Connecting pipe part 27 of branch pipe part 24
The valve body 98 is pushed down through the discharge passage 76 side of the main body 58 through the through hole, and water flows into the bathtub 30 through the discharge port 77. At this time, the valve bodies 92 and 94 are closed by water pressure, and water does not flow to the suction ports 83 and 85 sides. Therefore, hot water does not flow to the front side of the main body portion 58 at the time of hot water supply, hot water can be supplied with high safety, and the suction passage 74 and the discharge passage 76 are separated from each other. The scale and the like adhered to 18 are not returned to bathtub 30 at the time of hot water supply, so that no discomfort is caused.

When the bathtub water is drawn in, as shown in FIG.
As shown by arrows in FIG. 16, bathtub water flows from the suction ports 83 and 85 to the suction passage 74, and the valve bodies 92 and 94 are opened, so that the fitting pipe 72 is connected to the branch pipe portion via the suction passage 74. 24, and flows from the circulation pipe unit 34 through a reheating circuit (not shown).
Tub water is supplied to a washing machine or the like through an external hose 28 connected thereto. At this time, the cap 8 is attached to the main body portion 58, and the filter 18 of the cap 8 can prevent outflow of scale or the like. The cap 8 to which the descaling or the like has adhered can be easily removed from the main body 58 by being rotated, and can be washed. In this case, since the main body 58 is installed at a position lower than the circulation port 32, it is possible to suck even bathtub water having a water level lower than the circulation port 32 of the bathtub 30, and it is possible to increase the use efficiency of bathtub water. .

In the embodiment, the connecting pipe 26 of the branch pipe 24 is used for external water supply. However, the connecting pipe 26 is connected to the main body 58 so that the connecting pipe 27 can be used for external water supply. The connecting pipe portions 26 and 27 correspond to the mounting position of the bathtub 30 and the like, and can be set in a desired direction according to the mounting angle of the fixed platen 60. In this case, it is needless to say that the water flow directions of the water supply system and the reheating system on the side of the circulation pipe unit 34 are changed and set in accordance with the usage mode of the connecting pipe sections 26 and 27, that is, the mounting direction.

[0036]

As described above, according to the present invention,
The following effects are obtained. a It is possible to provide a circulation port adapter having a simple structure, a compact structure, easy construction, and high safety, and it is possible to achieve safety of hot water supply and reuse of bathtub water. b Since the discharge port and the suction port are provided separately, there is no need to return scale or the like adhering to the filter for filtering the bathtub water to the bathtub side when tapping. c Since the main body is installed at a lower position on the bottom surface side of the bathtub with respect to the branch pipe portion, bathtub water can be sucked from a low water level on the bottom surface side of the bathtub, and the efficiency of bathtub water reuse can be increased. d It is possible to provide a pipe connection structure that enables one-touch connection, and it is possible to simplify the maintenance as well as the ease of construction.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a circulation port adapter of the present invention.

FIG. 2 is a right side view of the circulation port adapter.

FIG. 3 is a side view showing the cover before a cover piece is separated.

FIG. 4 is a rear view showing the cover before a cover piece is separated.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a view showing a branch pipe part and a main body part.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a view showing an exploded structure of a main body.

FIG. 9 is a view showing a cap and a main body.

FIG. 10 is a view showing a connecting portion on a branch pipe portion side which is an embodiment of the pipe connecting structure of the present invention.

FIG. 11 is a view showing a connecting portion on a main body side which is an embodiment of the pipe connecting structure of the present invention.

FIG. 12 is a view showing attachment / detachment of a connection pipe part of a branch pipe part and a fitting connection part of a main body part.

FIG. 13 is a view showing attachment / detachment of a connection pipe part of a branch pipe part and a fitting connection part of a main body part.

FIG. 14 is a view showing an operation of supplying water to a bathtub.

FIG. 15 is a view showing a suction operation of bathtub water.

FIG. 16 is a view showing a suction operation of bathtub water.

[Explanation of symbols]

 2 Cover 20 Cover piece 22 Window part 24 Branch pipe part 26 First connection pipe part (insertion pipe part) 27 Second connection pipe part (insertion pipe part) 30 Bath tub 34 Circulation pipe unit 36 Circulation connection part 58 Body part 72 Fitting connection part (inserted pipe part) 74 Suction passage 76 Discharge passage 77 Discharge port 83, 85 Suction port 92, 94, 98 Valve body (valve means) 130 Locking projection (first projection) 132 Engagement Guide portion (second protrusion) 138 Slit 140 Insertion guide piece (insertion guide portion) 142 Locking recess

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 2D005 FA00 3J106 AB01 BA02 BB01 BC04 BD01 BE29 CA03 EA03 EB02 EC01 EC06 ED05 EE02 EF04 EF05 EF15 3L037 DA02 DB07

Claims (5)

[Claims] 1. A circulation connection unit connected to a circulation pipe unit for supplying hot water to a bathtub or circulating water in the bathtub to a reheating circuit, and a plurality of passages independent of a water flow direction of the circulation pipe unit. A first and a second connecting pipe section that forms a predetermined angle, and a branch pipe section that can set and fix the first and the second connecting pipe sections in a desired direction. Circulating port adapter. 2. A branch pipe portion directly or indirectly connected to a circulation pipe unit for supplying hot water to the bathtub or circulating water in the bathtub to the reheating circuit; With a suction port for sucking water, a main body portion formed with a discharge port for discharging water from the circulation pipe unit side to the bathtub side, and at the time of sucking the water, close the discharge port and open the suction port, A valve means for opening the discharge port and closing the suction port when discharging the water. 3. The circulation port adapter according to claim 2, further comprising the main body portion connected below the branch pipe portion and having the suction port disposed on the bottom side of the bathtub. 4. A cover for exposing and covering a part of the branch pipe part and the main body part so as to be detachably attached to the branch pipe part or the main body part, and one or more covers formed detachably on the cover. The circulation port adapter according to claim 1 or 2, wherein a part of the branch pipe portion can be protruded from a window formed by separating the cover piece. 5. A tube coupling structure for inserting an insertion tube portion into an inserted tube portion and connecting the two to each other, wherein an annular or arc-shaped first member is formed on a peripheral surface of the insertion tube portion.
A second protrusion formed at the same height as or equivalent to the first protrusion in a direction orthogonal to the first protrusion, and formed on an inner wall surface of the inserted pipe portion. An annular recess into which the first protrusion is inserted, and an insertion guide part, which is separated from the other part by a slit in the opening of the inserted pipe part, and into which the second protrusion is attached and detached. A tube coupling structure provided with: