JP2002263019A - Circulation adaptor integrated with draincock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circulation adaptor integrated with a draincock that can sufficiently exhibit the function of a circulation adaptor and a draincock and can compactly integrate both. SOLUTION: A circulation adaptor portion 5 having a return channel 51 and an outward channel 52 is formed in the central site of a body housing 110 fixed to a through hole 102 of the bottom wall 101 of a bathtub 100 and a drainage passage portion 7 having a doughnut shaped drainage passage 71 is formed in the peripheral site encircling the surrounding. When a draincock 8 in which a guide rod 82 is raised and lowered by guide holes 63 and 53 is raised or lowered, a packing 83 separates and comes in contact, opening and closing the drainage passage. Filter portions 84 and 84 are formed in the draincock to prevent suspended dirt from entering the return passage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bathtub drain plug,
The present invention relates to a drain plug integrated circulation adapter integrally formed with a circulation adapter for reheating circulation.

[0002]

2. Description of the Related Art Conventionally, as a bath system, for example, FIG.
As shown in the figure, a bath kettle 200 'with water heater and a bathtub 100'
Are connected to each other by a circulation pipe 300, and a circulation pump 3
By the operation of step 4, the water in the bathtub 100 'is removed from the bath kettle 20.
0 ′, thereby forcibly circulating the bathtub 100 ′.
It is generally known that the inside of the hot water can be reheated. In such a case, a circulation adapter 400 having a water inlet and a water outlet is installed on the side wall near the bottom surface of the bathtub 100 ', and the bath adapter 20 is attached to the circulation adapter 400.
The bathtub-side end of the circulation pipe 300 extending from 0 'is connected in communication. Then, hot and cold water of a predetermined temperature is poured from the bath kettle 200 'through the circulation pipe 300 into the bathtub 100', and is filled with water to a predetermined water level.

On the other hand, the bathtub 100 'is provided with a drain hole 501 penetrating a bottom wall for draining hot water after bathing. Usually, the drain plug 500 is manually opened / closed by the user to the drain hole 501. The drain hole 501 is opened and closed by being inserted or pulled out. An open / close drive type automatic drain plug is also known, and this automatic drain plug is configured to open and close by applying a lifting / lowering operation force from an actuator to the drain plug via a wire (for example, Japanese Patent Laid-Open No. 2000-2000). -121151).

[0004]

By the way, if a circulation adapter is provided on the bottom wall of the bath tub and the water outlet and the water inlet are opened at the bottom of the bath tub, it is necessary to check the water level at the time of hot water filling and to start the reheating. It is convenient to confirm the presence of hot water in the bathtub, and it is also possible to forcibly drain the hot water in the bathtub by using a circulation pump by branching the circulation circuit and connecting to a drainage channel. For this reason, it is conceivable to install the circulation adapter on the bottom wall of the bathtub, but it is necessary to form a through hole for installing the circulation adapter in addition to the drain hole on the bottom wall of the bathtub. Therefore, it is considered convenient if the circulation adapter and the drainage can be shared by one through hole.

[0005] However, if the circulation adapter, the drain hole and the drain plug are integrated as they are, the size becomes considerably large. In addition, when trying to synthesize by some structure, the drain hole needs to be closed when bathing and open when draining, while the water outlet and water inlet of the circulation adapter must always be open. For this reason,
It would be difficult to integrate the drain plug and the circulation adapter compactly while realizing their respective functions. In addition, when the drain plug to be integrated is an automatic drain plug, it becomes even more difficult.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a drainage system in which a circulation adapter and a drainage plug can be compactly integrated while sufficiently fulfilling their respective functions. It is an object of the present invention to provide a plug-integrated circulation adapter.

[0007]

According to a first aspect of the present invention, there is provided a circulating adapter integrated with a drain plug installed in a through-hole penetrating a bathtub wall of a bathtub. A forward passage and a return passage each extending in the penetrating direction of the through-hole at a central portion corresponding to the central portion and having one end side opened in the bathtub are arranged, and from the outer peripheral side of the central portion to the inner peripheral side of the through-hole. A drainage passage having an annular cross section of a donut and extending in the penetrating direction is provided in a corresponding outer peripheral portion, and a drainage plug that closes the opening so as to be openable and closable with respect to the bathtub side opening of the drainage passage is provided. (Claim 1).

According to the first aspect, when the through hole is viewed from the inside of the bathtub, a forward passage and a return passage functioning as a circulation adapter are arranged at a central portion, and a donut-shaped annular drain passage is arranged therearound. As a result, the circulation adapter and the drain passage can be arranged compactly.
In addition, a drain plug is removably provided at the bathtub side opening of the drain passage so that the opening and closing of the drain passage can be switched.

According to a second aspect of the present invention, there is provided a drainage plug-integrated circulation adapter installed in a through hole penetrating a bottom wall of a bathtub,
A circulating adapter portion which is formed inside and has a forward and a return passage extending vertically and having one end side opened in the bathtub, and disposed at a central portion of the through hole; an outer peripheral side of the circulating adapter portion; A drain passage portion provided between the inner peripheral side of the through hole and having a donut annular cross-section and having a vertically extending drain passage formed therein, and a bathtub-side opening of the drain passage provided so as to be movable up and down. And a drain plug that performs the operation (claim 2).

According to the second aspect, the first invention of the first aspect is further embodied. That is, when the through hole is viewed from above in the bathtub, the circulation adapter portion is located at the center,
Drainage passages are arranged around the circulation adapter, respectively, so that the whole can be made compact. By raising and lowering the drain cock, it becomes possible to open and close the opening on the bathtub side of the drain passage in the drain passage portion. That is, it becomes suitable as an integrated type of the manual opening / closing operation type drain cock and the circulation adapter.

According to a third aspect of the present invention, there is provided a drainage plug-integrated circulation adapter installed in a through hole penetrating a bottom wall of a bathtub,
A circulating adapter portion which is formed inside and has a forward and a return passage extending vertically and having one end side opened in the bathtub, and disposed at a central portion of the through hole; an outer peripheral side of the circulating adapter portion; A drain passage portion provided between the through hole and the inner peripheral side and having a vertically extending drain passage having a donut annular cross-section, and a tub-side opening of the drain passage which is held up and down so as to be openable and closable; A drain plug and lifting means connected to the drain plug at one end for raising and lowering the drain plug are provided, a receiving hole is formed in the circulation adapter portion, and the lifting means is provided for the receiving hole. (Claim 3).

According to the third aspect, the first invention of the first aspect is embodied as being capable of remotely controlling the opening and closing of the drain cock. That is, the circulating adapter part is at the center,
The drainage passages are arranged around the circulation adapter, respectively, so that the entire structure is compact, and the drainage passage of the drainage passage can be opened and closed by moving the drainage plug up and down. Since the lifting and lowering means for raising and lowering the drain plug is inserted into the accommodation hole while realizing both, the drain plug is raised and lowered by the raising and lowering means. Then, the drain passage is opened and closed by the operation of raising and lowering the drain plug. Here, the above-mentioned "elevating means"
In addition to those that directly apply the lifting operation force by a lifting device such as a stepping motor, the indirect lifting operation force is applied by a transmission member that transmits the lifting operation force such as a link rod, an operating rod, or an operating wire. And the like. In the case of the above-described transmission member, one end of the transmission member is connected to the drain plug, the other end is extended to, for example, the edge of the bathtub, and the other end of the transmission member is operated by the user, or the other end is described above. The drainage faucet can be remotely opened and closed by causing the elevating device to move forward / backward and transmitting the forward / backward operating force to the drainage faucet as the lifting / lowering operating force.

In the above-mentioned claim 2 or claim 3,
It is also possible to integrally form the guide portion extending downward on the drain plug, and to form a guide hole in the circulation adapter portion for receiving the guide portion inside and guiding the upward and downward movement of the drain plug (claim 4). In this case, since the guide portion is guided by the guide holes, the operation of raising and lowering the drain plug is performed smoothly and reliably. Therefore, regardless of whether the opening and closing of the drain passage by the operation of raising and lowering the drain plug is manual operation or automatic operation by the raising and lowering means, the operation is smoothly and reliably performed in any case.

The drain plug described above may be formed so as to have the same donut shape as the donut-shaped drain passage, or may be configured to cover each one-end opening of the going passage and the return passage. In this case, in any one of the above-mentioned claims 1 to 4, a pair of communication holes for connecting one end of each of the going passage and the return passage to the inside of the bathtub with the drain passage closed is formed in the drain plug. Good (claim 5). This makes it possible to reheat and circulate through the going passage and the return passage while the drain passage is closed by the drain plug, and to more reliably function both as a circulation adapter and a drain plug. And it can be concretely realized.

The drain plug according to the fifth aspect may be provided with a filter portion at least in a communication hole communicating with the return passage (claim 6). In this case,
When the hot water in the bathtub is returned through the return passage, floating dust and the like are collected by the filter section. On top of that, the filter section is provided on the drain plug, and when the drain plug is opened, the drained hot water flows into the drain passage without passing through the filter section. Can be prevented from being clogged.

[0016]

As described above, according to the drain plug integrated circulation adapter according to any one of claims 1 to 6,
The circulation adapter and the drain plug can be compactly integrated while sufficiently fulfilling their respective functions.

In particular, according to claim 2 or claim 3, the above-mentioned effects can be more specifically obtained.
According to claim 2, according to claim 3, a configuration suitable as an integral type of a manual opening / closing operation type drain cock and a circulation adapter is provided.
It is possible to specifically provide a configuration suitable as an integrated type of a drainage plug and a circulation adapter that can be opened and closed automatically or the like by a lifting means.

According to a fourth aspect of the present invention, the drainage faucet is smoothly and reliably moved up and down in both the manual operation and the automatic operation by guiding the guide portion by the guide hole. Can be.

According to the fifth aspect, it is possible to reheat and circulate through the going passage and the return passage while the drain passage is closed by the drain plug, and the function as the circulation adapter and the function as the drain plug are achieved. Both functions and functions can be realized more reliably and specifically.

Further, according to the present invention, when the hot water in the bathtub is returned through the return passage, floating dust and the like can be collected by the filter portion, and when the drain plug is opened to drain water. Also, it is possible to prevent floating dust and the like in the drainage from clogging the filter section.

[0021]

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

FIG. 1 shows a bath system to which an embodiment of the present invention is applied. The bath system has a bathtub 100 in which a circulation adapter 11 or 12 integrated with a drain plug is installed on a bottom wall 101 and a hot water supply function, a hot water filling function, and a forced circulation type reheating function controlled by a controller (not shown). It is formed by connecting a bath kettle 200 with a water heater to be exhibited by a circulation pipe 300. As another bath system, there is a bath system in which a bathtub and a filter (purifier) are connected by a circulation pipe, and water in the bathtub is circulated between the bathtub and the filter to purify the bathtub. The above-mentioned drain plug integrated circulation adapter 11 or 12 is attached to the bottom wall of the bathtub.
May be applied.

First, the bath kettle 200 with a water heater will be described. The bath kettle 200 with a water heater is provided with a hot water supply circuit 2, a reheating circuit 3 for reheating the hot water in the bathtub 100, and a hot water supplied from the hot water supply circuit 2 to the reheating circuit 3 for pouring the hot water. And a pouring circuit 4 for filling the hot water 100.

The hot water supply circuit 2 heats the water introduced into the hot water supply side heat exchanger 22 from the water supply line 21 connected to the water supply pipe by the combustion heat of the hot water supply side combustion burner 23, and discharges the heated hot or cold water. Hot water is supplied to the hot water tap 25 at the downstream end through the pipe 24. A bypass pipe 26 is provided between the water supply pipe 21 and the tapping pipe 24 so that the temperature is adjusted by adjusting the mixing of water by an adjustment valve (not shown).

The water supply line 21 is provided with a water quantity sensor 28.
And a water temperature sensor 29 for detecting the temperature of hot water supplied to the hot water tap 25 or the pouring circuit 4. And are arranged.

The reheating circuit 3 includes a return line 3 connected to the circulation adapter 11 or 12, respectively.
2 and a circulation pipe 300 composed of an outgoing pipe 33, and burns the water in the bathtub 100 returned from the return pipe 32 to the reheating heat exchanger 35 by the operation of the circulation pump 34. Heating is performed by heat, and the heated hot water is supplied again through the going pipe 33 into the bathtub 100 to reheat and circulate the heat. In the return line 32, a water level sensor 37 for detecting the water level of the bathtub 100 by detecting the water pressure, the circulation pump 34, and a flap opened by passage of the circulation flow to determine the circulation from the upstream side in the circulation direction of the circulation hot water. Are provided, and a bath water temperature sensor 39 for detecting the temperature of the circulating water flowing into the reheating-side heat exchanger 35 is provided.

The pouring circuit 4 has an upstream end branched from the downstream side of the tapping line 24 and a downstream end connected to the circulation pump 34.
And a pouring line 41 communicating with a return line 32 on the discharge side of the hot water supply line.
It can be poured to zero. A pouring amount sensor 42 for detecting a pouring flow rate is provided at an upstream end position of the pouring circuit 4.
And a pouring solenoid valve 43 for performing pouring by opening and closing control, and a two-stage check valve 44 are provided. This check valve 44
This prevents the circulation hot water from flowing back into the hot water supply circuit 2 from the reheating circuit 3 side.

<First Embodiment> Next, a drain plug integrated circulation adapter (hereinafter, also simply referred to as a "circulation adapter") 11 of a first embodiment applied to the bathtub 100 of the above bath system will be described in detail. explain. The circulation adapter 11 is configured integrally with a drainage plug of a type that is opened and closed by a user's manual opening and closing operation.

The circulation adapter 11 is fixed to a through hole 102 formed in a bottom wall 101 of the bathtub 100 as shown in FIG.
A bolt ring 111, a nut ring 112, and a drain plug 8 are provided as main components.

To fix the circulation adapter 11 to the bathtub 100, first, a bolt ring 111 is fitted into the through hole 102 from the bathtub via a seal packing, and then the main body housing 11 is inserted into the bolt ring 111.
0 is press-fitted with an O-ring or the like interposed therebetween. Then, the nut ring 112 is screwed into the bolt ring 111 from outside the bathtub and fastened, so that the through hole 1
02 and the body housing 11
0 is inserted between the bolt ring 111 and the bolt ring 111. As described above, the circulation adapter 11 is fixed to the bottom wall 101 of the bathtub 100.

The main body housing 110 is formed therein with a circulation adapter portion 5 constituting a central portion and a drainage passage portion 7 constituting an outer peripheral portion. The upper portion of the circulation adapter portion 5 is used for setting a stirring direction. The stirring adapter 6 is assembled.

As shown in FIG. 3, the circulation adapter 5 has a return passage 51, a forward passage 52, and a guide hole 53.
Are formed inside. The return passage 51 extends upward, and one end of the return passage 51 penetrates the stirrer adapter 6 to form the bathtub 1.
00, and the other end side extends laterally to return line 32
(See FIG. 3). The outgoing passage 52
Is similarly extended upward and one end side is the stirring adapter 6.
, And opens into the bathtub 100, and the other end side extends to the side and is connected to the going pipeline 33 (see FIG. 3). The stirring adapter 6 is fitted in the guide hole 53 so as to be rotatable around a vertical axis. The stirring adapter 6 has a guide hole 63 penetrated in the vertical direction. The guide hole 63 guides and supports the raising and lowering operation of a later-described guide rod 82 of the drain plug 8 together with the guide hole 53. 2 is a drain hole for draining hot water collected in the guide hole 53 to the return passage 51.

The stirring adapter 6 is connected to the guide hole 63.
In addition, a curved concave portion 61 for the return passage 51, a curved concave portion 62 for the outward passage 52, and both concave portions 61,
62 are provided with arc-shaped through-holes 64 formed respectively. Each arc-shaped through-hole 64 communicates with the upper end opening of the return passage 51 or the forward passage 52 even when the stirring adapter 6 is turned around a predetermined range around the vertical axis. By changing the opening direction of the depressions 61 and 62 by turning in the above-described predetermined range, the discharge direction of the heated hot water supplied through the going passage 52 into the bathtub 100 can be changed and adjusted. It has become.

The drainage passage 7 is provided with a drainage passage 71, 71,... Arranged in a donut ring shape so as to surround the periphery of the circulation adapter 5, and a drainage space 72 communicating below each drainage passage 71. A drain pipe 73 is connected to the drain space 72 so as to communicate therewith. Each of the drainage passages 71 is formed by a space in the donut annular space excluding the support portions 74, 74,... Which support the circulation adapter portion 5.

The drain plug 8 has a central portion 81 of a convex curved surface that covers the upper surface of the stirring adapter 6, and a guide portion extending downward from the center of the central portion 81 and inserted into the guide holes 63 and 53. A guide rod 82, a flange portion 81a extending around the central portion 81 at a position corresponding to the upper surface of each drainage passage 71, and an entire bathtub-side opening of each drainage passage 71 below the flange portion 81a. And a packing 83 stopper. Filter portions 84, 84 made of a mesh such as a wire net are formed in a range corresponding to the recesses 61, 62 in the central portion 81. The filter portions 84 also constitute a pair of communication holes. In addition, reference numeral 80 in FIG. 2 denotes a chain or the like for pulling the drain plug 8 upward to convert the drain plug 8 to an open state (a state shown by a dashed line in FIG. 2).

In the case of the circulating adapter 11 integrated with a drain plug described above, the drain plug 8 is dropped into the guide holes 63, 53, and all the drain passages 71, 71,... Are closed by the packing plug 83 (the solid line in FIG. 2). (State shown). And
When the circulation pump 34 (see FIG. 1) is activated to start reheating circulation, the hot water in the bathtub 100 is sucked into the return passage 51 through the filter portion 84 and subsequently passed through the return line 32 to the heat exchanger. The hot water after being returned to 35 and heated by the heat exchanger 35 is supplied into the bathtub 100 through the outgoing pipeline 33, the outgoing passage 52, and the filter section 84. At this time, the heated hot water is discharged into the bathtub 100 in the opening direction of the recess 62 of the stirring adapter 6 to stir the hot water in the bathtub 100.

When the hot water in the bathtub 100 is drained after bathing, pulling the chain or the like 80 to raise the drain plug 8 opens the bathtub side of each drainage passage 71 to open the bathtub. The hot water in 100 flows into each drain passage 71 and is subsequently drained through a drain space 72 and a drain pipe 73.

The drain plug 8 is provided with the guide holes 63 and 5.
The drain plug 8 can be easily removed by pulling out the guide rod 82 from 3, so that the above-mentioned filter portions 84 originally attached to the circulation adapter portion 5 can be easily cleaned.

<Second Embodiment> FIG. 4 shows a drainage plug-integrated circulation adapter 12 according to a second embodiment. The circulation adapter 12 is configured integrally with a drain plug (automatic drain plug) 13 that is driven to open and close by a driving unit (not shown) (integrated with an automatic drain plug).

The circulation adapter 12 has a through-hole 102 penetrating through the bottom wall 101 of the bathtub 100 as in the first embodiment.
The drain plug 13 is supported so as to be able to move up and down, and a return passage 121, a going passage 122, and a drain passage 123 are formed therein.

The drain plug 13 comprises a plug 131 and a guide rod 132. The guide rod 132 is inserted into a guide hole 124 passing through the central portion (circulation adapter portion) of the circulation adapter 12, and is guided and supported so as to be able to move up and down. Have been. One end of the return passage 121 is opened into the bathtub 100 through the communication hole 133 of the drain plug 13, and the other end is connected to the return pipe 32. The outgoing passage 122 has one end opened into the bathtub 100 through the communication hole 134 of the drain plug 13, and the other end connected to the outgoing conduit 33. Each of the communication holes 133 and 134 is
It is bent in a substantially L-shape and is opened in a direction along the bottom wall 101 of the bathtub 100, and particularly, hot water supplied from the outgoing passage 122 is discharged along the bottom surface of the bathtub 100.

The drain passage 123 has a donut-shaped annular cross section at the outer peripheral position of the circulation adapter 12 and extends in the vertical direction. One end is opened in the bathtub 100, and the other end is connected to the drain pipe 73. I have. When the drain plug 13 rises, the bathtub side of the drain passage 123 is communicated with the inside of the bathtub 100 and is opened (see the dashed line in FIG. 4), while the drain plug 13 descends to move the drain plug 123 downward. The bathtub side of the drain passage 123 is closed (see the solid line in FIG. 4).

The reciprocal conversion between the open state and the closed state of the drain plug 13 is performed by pushing / pulling (advancing / retracting) the operating wire 14 as a lifting / lowering means which is passed through the receiving hole 125 and has one end connected to the guide rod 132. The operation wire 14 is slid in the guide tube 141 by the driving of the drive unit 15 shown in FIG. The driving unit 15 is provided on the flange 10 of the bathtub 100.
3, a drive motor 151 configured by, for example, a stepping motor, a shaft 152 that is rotated forward and reverse by the drive motor 151, and a shaft that is driven by the rotational force of the shaft 152 being converted into an advance / retreat operating force. And a body 153. The operating wire 14 is connected to the tip of the shaft 153 via a coupling 154.

The operation of the drive unit 15 is controlled by an automatic drain plug controller 16. The automatic drain plug controller 16 receives an operation signal of an open / close switch 161 disposed on the upper surface of the flange 102 and receives the drive motor 151.
Is rotated by a predetermined amount of forward / backward movement required for the opening / closing conversion of the drain plug 13. The amount of advance and retreat of the operation wire 14 based on this rotation operation is detected by, for example, a magnetic position sensor 162, and upon receiving this detection signal, the automatic drainage controller 16 determines whether the drainage plug 13 is open or closed. Is to be detected. The automatic drain cock controller 16 outputs information on the open / close state of the drain cock 13 based on the position sensor 162 to the controller of the bath kettle 200 with a water heater, and performs various controls on the bath kettle 200 side. It can be used as judgment information.

<Other Embodiments> In the first and second embodiments, the drainage plug integrated circulation adapters 11, 12
A configuration may be added in which the relative positions of the drain plugs 83, 13 are determined in advance in a predetermined positional relationship to restrict the free rotation of the drain plugs 83, 13. That is, in the case of the first embodiment, the inner surfaces of the guide holes 63 and 53 are formed not in a circular cross section but in a cross sectional shape (for example, a D-shaped cross sectional shape) having a fitting portion in a part thereof. The guide rod 82 of the drain plug 83 is formed in a cross-sectional shape (for example, a D-shaped cross-sectional shape that matches the inner surface shape of the D-shaped cross-section) that can be fitted inside the fitting portion. Accordingly, the return passage 51 / the outgoing passage 52 and the communication hole (filter portion) 8 serving as the bathtub-side opening.
4, 84 should always be opposed to each other. In this case, it is also possible to omit the formation of the filter portion that discharges from the outgoing passage 52 into the bathtub 100. Also,
In the case of the second embodiment, the guide hole 124 is formed in a cross-sectional shape (for example, a D-shaped cross-sectional shape) partially having a fitting portion in the same manner as described above, and the guide rod 132 of the drain plug 13 is It is formed into a cross-sectional shape (for example, a D-shaped cross-sectional shape that matches the inner surface shape of the D-shaped cross-section) that can be fitted into the fitting portion. Thereby, the return passage 121 / the outgoing passage 122
And the communication hole 133 / communication hole 134, which is an opening on the bathtub side, may always be opposed to communicate with each other.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a bath system to which an embodiment of the present invention is applied.

FIG. 2 is an explanatory longitudinal sectional view showing the first embodiment.

FIG. 3 is an explanatory plan view showing a state in which a drain plug of FIG. 2 is removed.

FIG. 4 is a longitudinal sectional view showing a second embodiment.

FIG. 5 is a schematic diagram illustrating a driving unit according to a second embodiment.

FIG. 6 is a view corresponding to FIG. 1 including a bathtub provided with a conventional circulation adapter and a drain plug.

[Explanation of symbols]

 Reference Signs List 5 circulation adapter part (central part) 7 drain passage part (outer peripheral part) 8, 13 drain plug 11, 12 drain plug integrated circulation adapter 14 operating wire (elevating means) 51, 121 return passage 52, 122 outgoing passage 63, 53 , 124 guide holes 71, 123 drain passages 82, 132 guide rods (guide portions) 84 filter portions (communication holes) 100 bathtub 101 bottom wall (bathtub wall) 102 through-holes 125 accommodation holes 133, 134 communication holes

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E03C 1/23 E03C 1/23 Z F24H 9/00 F24H 9/00 W 9/12 9/12 B 9 / 16 9/16 F

Claims (6)

[Claims] 1. A drainage plug-integrated circulating adapter installed in a through hole penetrating a bathtub wall of a bathtub, wherein each of the adapters extends in a penetrating direction of the through hole at a central portion corresponding to a central portion of the through hole. A forward passage and a return passage, one end side of which is open in the bathtub, are provided, and a drainage passage extending from the outer peripheral side of the central part to an outer peripheral part corresponding to the inner peripheral side of the through hole and having a donut annular cross section and extending in the penetrating direction. And a drain plug for closing the opening of the drain passage so as to be openable and closable with respect to the bathtub side opening of the drain passage. 2. A drainage plug-integrated circulating adapter installed in a through hole penetrating a bottom wall of a bathtub, wherein a forward passage and a return passage each extending in the vertical direction and having one end opened into the bathtub. And a circulation adapter portion disposed at the center portion of the through hole, and a donut annular cross-section disposed between the outer peripheral side of the circulation adapter portion and the inner peripheral side of the through hole, and having a vertical direction. A drain plug integrated circulation adapter, comprising: a drain passage portion having an extended drain passage formed therein; and a drain plug disposed so as to be able to ascend and descend to open and close a bathtub side opening of the drain passage. 3. A drainage plug-integrated circulation adapter installed in a through-hole penetrating a bottom wall of a bathtub, wherein a forward passage and a return passage each extending in a vertical direction and having one end opened into the bathtub. And a circulation adapter portion disposed at the center portion of the through hole, and a donut annular cross-section disposed between the outer peripheral side of the circulation adapter portion and the inner peripheral side of the through hole, and having a vertical direction. A drainage passage portion having an extended drainage passage formed therein; a drainage plug held up and down to open and close a bathtub side opening of the drainage passage; an elevating means having one end connected to the drainage plug to operate the drainage plug up and down And a housing hole is formed in the circulation adapter portion, and the lifting / lowering means is housed in the housing hole. 4. The drain plug integrated circulation adapter according to claim 2 or 3, wherein the drain plug is integrally formed with a guide portion extending downward, and the circulation adapter portion has the guide portion inside. And a guide hole for guiding the ascending and descending movement of the drainage plug. 5. The drainage plug-integrated circulation adapter according to claim 1, wherein one end of each of the outgoing passage and the return passage is provided in the bathtub with the drainage passage closed. A drainage plug-integrated circulation adapter, wherein a pair of communication holes communicating with the drainage pipe are formed. 6. The drain plug integrated circulation adapter according to claim 5, wherein the drain plug includes a filter in at least a communication hole communicating with the return passage.