JP2009281606A - Adaptor of hot water supply port for bathtub - Google Patents

Abstract

[PROBLEMS] To easily cope with a malfunction of a valve portion.
A flow path forming unit 3 is detachably attached from the inside of a tank to attachment members 1 and 2 attached in a penetrating manner to an attachment hole H of a bathtub wall W. The water supply adapter for bathtubs in which the water supplied to the flow path formation unit 3 through 2 is discharged into the tank is an object. The flow path forming unit 3 includes a first unit part and a second unit part that is detachably assembled to the first unit part. The flow path forming unit 3 backflows into an internal flow path for circulating water in the flow path forming unit 3. A prevention valve is provided, and the first and second unit parts are separated at a portion where the backflow prevention valve is installed.
[Selection] Figure 6

Description

  The present invention relates to a hot water inlet adapter for a bathtub attached to a bathtub wall for supplying hot water.

  2. Description of the Related Art Conventionally, a hot water supply system for a bathtub in which a bathtub and a water heater are connected by piping so as to perform hot water treatment and reheating processing on the bathtub is well known.

  As a hot water supply adapter used in such a hot water supply system for a bathtub, for example, the one shown in Patent Document 1 below is well known. This hot water supply adapter is an outer tank mounting member that is mounted on the outer surface of the bathtub, an inner mounting member that is mounted from the inner surface of the bathtub, and a flow path forming unit that is mounted on the inner mounting member in a protruding manner in the tank. And a filter member attached to the in-tank protruding portion of the flow path forming unit.

  The flow path forming unit in the hot water supply adapter includes a discharge flow path for discharging water supplied from outside the tank into the tank and a suction flow path for discharging water sucked from the tank to the outside. On the discharge flow path and the suction flow path, a backflow prevention valve for preventing the backflow of water is provided.

When reheating, etc., hot water in the tank sucked in through the suction flow path is sent to an external water heater, where it is reheated and then supplied into the tank through the discharge flow path. It has become so.
JP 10-47783 A

  When the conventional hot water supply adapter shown in Patent Document 1 sucks foreign matter such as dust and hair floating in the bathtub together with water and adheres to the valve portion in the flow path forming unit, the operation of the valve portion Is hindered, water suction and discharge are not performed smoothly, and hot water supply performance is degraded.

  However, the flow path forming unit in the above-described conventional hot water supply adapter has a structure in which the lid member is fixed to the opening of the unit main body by an adhesion process or a welding process and cannot be easily disassembled. For this reason, even if a foreign matter adheres to the valve part as described above and a problem occurs, the flow path forming unit cannot be disassembled, so that the valve part incorporated in the flow path forming unit can be easily cleaned or replaced. There was a problem that it was difficult to cope with the malfunction of the valve part.

  This invention is made | formed in view of said subject, and it aims at providing the hot water inlet adapter for bathtubs which can cope easily with the malfunction of a valve part.

  In order to achieve the above object, the present invention is summarized as follows.

[1] A flow path forming unit is detachably attached from the inside of the tank to a mounting member that is attached in a penetrating manner to the mounting hole of the bathtub wall, and is supplied to the flow path forming unit from outside the tank via the mounting member. A hot water outlet adapter for bathtubs that allows water to be discharged into the tank,
The flow path forming unit includes a first unit component and a second unit component that is removably assembled to the first unit component.
A backflow prevention valve is provided in the internal flow path for circulating water in the flow path forming unit,
The hot water outlet adapter for a bathtub, wherein the first and second unit parts are separated at a portion where the check valve is installed.

  [2] The bathtub hot-water adapter according to item 1, wherein the first and second unit parts are held in an assembled state without using an adhesion process or a welding process.

  [3] The hot water outlet adapter for bathtubs according to the preceding item 1 or 2, wherein the backflow prevention valve is sandwiched between the first and second unit parts and assembled to the flow path forming unit.

[4] The internal flow channel distributes water supplied from outside the tank and discharges the water into the tank, and flows the water sucked from the tank and flows out of the tank. Including a first and a second suction channel,
The above-mentioned backflow prevention valve includes the first and second discharge valves provided on the first and second discharge flow paths, and the first and second suction valves provided on the first and second suction flow paths. The hot-water supply port adapter for bathtubs of any one of 1-3.

[5] Of the first and second discharge valves and the first and second suction valves, the first valve member in which any two backflow prevention valves are integrally formed and the remaining two backflow prevention valves are integrated. A second valve member formed on
5. The previous item 4 in which the connection part between two backflow prevention valves in the first valve member and the connection part between two backflow prevention valves in the second valve member are sandwiched by the first and second unit parts. Hot water outlet adapter for bathtubs.

  [6] The first and second valve members have a sheet-like shape, the one side region is configured as one backflow prevention valve, and the other side region is configured as the other backflow prevention valve. Hot water inlet adapter for bathtubs as described.

[7] The first unit component has a disk part having an opening in the center, and a cylindrical part provided corresponding to the opening on the rear surface side of the disk part, and a valve is provided in the opening of the disk part. A support bar is provided,
The second unit part has a fitting cylinder part on the front side thereof, and a valve support bar is provided at a front end opening of the fitting cylinder part,
The first and second unit parts are assembled in a state in which the fitting cylinder part of the second unit part is inserted into the cylindrical part of the first unit part and pressed against the disk part, and the disk part The bathtub hot-water supply adapter according to the preceding item 6, wherein the connecting portion of the valve member is sandwiched between the valve support bar on the side and the valve support bar on the fitting head side.

[8] The flow path forming unit includes a tightening ring that can be screwed into the cylindrical portion of the first unit component.
The said fastening ring is for the bathtub of the preceding clause 7 which is screwed and fixed to the cylindrical part of the said 1st unit component in the aspect which press-fits the fitting cylinder part of the said 2nd unit component to the said disk part side. Water heater adapter.

[9] The mounting member includes an outer tank mounting member disposed on the outer side of the tank and an inner tank mounting member that is mounted on the outer mounting member from the inner side of the tank through the mounting hole. It has a flange portion arranged at the peripheral edge portion of the mounting hole in the inner wall surface, and a plurality of L-shaped locking grooves are provided on the outer peripheral end surface of the flange portion at intervals in the circumferential direction.
The flow path forming unit is provided with a disc portion, a rear projecting edge portion provided so as to extend rearward at an outer peripheral edge portion of the disc portion, and an inner circumference of the rear projecting edge portion at a circumferential interval. A plurality of locking projections,
The flow path forming unit is connected to the in-tank mounting member so as not to come out in the front-rear direction by inserting the locking protrusion into the locking groove and twisting the locking projection.
A pin hole penetrating in the front-rear direction is formed in the disk portion, and the tip end portion of the lock pin inserted into the pin hole so as to be able to move forward and backward is inserted into the lock portion provided on the front surface of the flange portion of the in-tank mounting member The hot water inlet adapter for bathtubs according to any one of the preceding items 1 to 8, wherein the flow path forming unit is connected to the in-tank mounting member so as not to rotate relative thereto.

  According to the hot water inlet adapter for bathtubs according to the invention [1], since the valve can be taken out by disassembling the first and second units, it is possible to easily cope with the malfunction of the valve portion.

  According to the hot water inlet adapter for bathtubs according to the invention [2], the first and second units can be disassembled more reliably.

  According to the bathtub hot water supply adapter according to the invention [3], the valve can be surely incorporated in the flow path forming unit.

  According to the hot water inlet adapter for bathtubs according to the invention [4], it can be configured as a nonpolar type.

  According to the hot water inlet adapter for bathtubs according to the inventions [5] and [6], the valve can be attached and detached more easily.

  According to the bathtub hot water supply adapter according to the invention [7], the valve can be more reliably incorporated into the flow path forming unit.

  According to the hot water inlet adapter for bathtubs according to the inventions [8] and [9], the flow path forming unit can be disassembled and assembled more easily.

  1-4 is a figure which shows the hot-water supply port adapter for bathtubs which is embodiment of this invention. As shown in these drawings, the hot water supply adapter of this embodiment is assembled in a mounting hole (H) provided in the side wall (W) of the bathtub (T). This adapter supplies hot water processing (hot water storage processing) in which hot water supplied from a water heater provided outside the bathtub (T) is supplied into the bathtub (T), and hot water in the bathtub (T). It can be sucked and sent to a water heater, where it can be reheated and reheated to return the hot water to the bathtub (T) and perform a reheating process (forced circulation process).

  In addition, this hot water supply port adapter can be used regardless of which one of the forward pipe and the return pipe connected to the water heater is connected to the two outer pipe connecting portions (1a) and (1b) provided in the adapter. Of the sex type.

  The hot water supply adapter according to the present embodiment includes a tank outer mounting member (1), a tank inner mounting member (2), a flow path forming unit (3), and a filter member (9) as basic components. ing. In the following description, the inner side of the tank is referred to as “front side” or “one end side” and the outer side of the tank is referred to as “rear side” or “other end side” along the axial direction of the hot water supply adapter.

  The outside mounting member (1) includes a cylindrical outer cylinder portion (12) having one end side (front side) opened and the other end side (rear side) closed, and the outer cylinder portion (12). A cylindrical inner cylinder part (11) disposed coaxially inside, a flat ring-shaped flange part (15) provided on one outer periphery of the outer cylinder part (12), and an outer cylinder part (12) It is comprised with the metal product which has integrally the tubular 1st and 2nd outer pipe | tube connection part (1a) (1b) provided in the other end obstruction | occlusion wall.

  An inner space of the inner cylinder part (11) is configured as a part of a first flow path (A) described later, and an annular space between the inner cylinder part (11) and the outer cylinder part (12) is described later. It is configured as a part of the second flow path (B), and the first outer pipe connection portion (1a) communicates with the first flow path (A) and the second outer pipe connection portion (1b) It communicates with the second channel (B).

  On the inner peripheral surface of the front portion of the outer cylinder portion (12), a female screw for assembling the in-tank mounting member (2) is engraved.

  The ring-shaped synthetic rubber covering packing (82) provided on the flange portion (15) of the outer tank mounting member (1) has a fitting groove formed along the inner peripheral surface thereof. The flange portion (15) is accommodated and fixed in a state of covering almost the entire outer peripheral surface of the flange portion (15) so as to accommodate the flange portion (15). The front side of the covering packing (82) is formed in a thick plate shape and is configured as a packing body.

  The in-tank attachment member (2) is formed by integrating a cylindrical cylindrical portion (21) whose both ends are open and a flat plate ring-shaped flange portion (25) provided on the outer periphery of the front end of the cylindrical portion (21). It is constituted by a cylindrical hard synthetic resin molded product with a flange made of a polyacetate resin or the like.

  The cylindrical portion (21) has a male screw engraved on the outer peripheral surface thereof corresponding to the female screw of the outer tank mounting member (1), and the cylindrical hole of the outer cylindrical portion (12) in the outer tank mounting member (1). It is configured to be screwed inside.

  On the front side of the flange portion (25), a plurality of bottomed lock recesses (26) are formed at predetermined intervals along the circumferential direction. In this embodiment, this lock recessed part (26) is comprised as a lock part.

  Further, as shown in FIGS. 3 and 5, a plurality of locking grooves (27) are formed at predetermined intervals along the circumferential direction on the outer peripheral edge of the flange portion (25). Each locking groove (27) has only one circumferential end opened on the front side (inlet side), and the entire circumferential direction is opened on the rear side (back side). ) In the state seen from FIG.

  As shown in FIGS. 1 to 4, the elastic packing (83) interposed between the in-tank mounting member (2) and the inner wall surface of the bathtub (T) has a ring shape corresponding to the shape of the flange portion (25). It is composed of synthetic rubber moldings.

  The buffer member (84) interposed between the flange portion (25) and the packing (83) is formed in a flat ring shape corresponding to the shape of the flange portion (25). This buffer member (84) is formed of a molded product of a soft synthetic resin such as a polyethylene resin having softness or elasticity.

  And in the state arrange | positioned so that the flange part (15) of the said tank outer attachment member (1) may be along the peripheral part of the attachment hole (H) in the outer wall surface of a bathtub (T), (2) ) Flange portion (15) is pressed against the peripheral edge portion of the mounting hole (H) on the inner wall surface of the bathtub through the buffer member (84) and the packing (83), The cylindrical portion (21) is screwed and fixed through the mounting hole (H). Thereby, both attachment members (1) and (2) are bathtubs, when the flange parts (15) and (25) of both attachment members (1) and (2) clamp the attachment hole peripheral part in a bathtub side wall (W). It is fixed to the side wall (W) in a penetrating state.

  In this embodiment, the attachment member is comprised by the tank outer attachment member (1) and the tank inner attachment member (2).

  As shown in FIGS. 6 and 7, the flow path forming unit (3) includes a unit body (4) constituting the first unit part, a valve support member (5) constituting the second unit part, and a tightening ring ( 6) are provided as basic components. In the present embodiment, the component parts (4) to (6) of the flow path forming unit (3) do not use an adhesive treatment using an adhesive or a welding treatment using a solvent or heat, as will be described in detail below. It is assembled by mechanical (physical) fixing means.

  As shown in FIGS. 4 and 6-8, the unit main body (4) includes a circular disc portion (45) and a cylindrical cylinder integrally formed so as to extend rearward at the center of the rear surface side of the disc portion (45). Part (41). A female screw (41a) is engraved on the rear end portion of the inner peripheral surface of the cylindrical portion (41).

  A central opening (opening) penetrating in the front-rear direction is formed in the central part of the disk part (45) corresponding to the cylindrical hole of the cylindrical part (41). The central port is divided into four quarter-shaped openings by a vertical partition wall (42) and a horizontal rail (43). Of these four openings, when viewed from the front side (toward FIG. 8), the upper left opening is configured as a suction side first opening (46a), and the upper right opening is configured as a suction side second opening (46b). The Further, the lower right opening is configured as a discharge side second opening (47b), and the lower left opening is configured as a discharge side first opening (47a).

  Moreover, the horizontal crosspiece (43) which partitions the center port of the disk part (45) is comprised as a valve support crosspiece which supports the sheet-like valve members (7a) (7b) mentioned later. Further, two pinning holes (44) are formed on the rear surface side of the horizontal rails (43) (43).

  A partition wall (36) is formed on the front side of the disk portion (45) of the unit body (4) so as to surround the suction side first and second openings (46a) and (46b) from the periphery. The region surrounded by the wall (46) is configured as the first and second suction chambers (36a) and (36b). The first suction chamber (36a) communicates with the suction side first opening (46a) and has a front end opened forward. Further, the second suction chamber (36b) communicates with the suction side second opening (46b) and has a front end opened forward.

  Further, on the front side of the disk part (45) in the unit main body (4), an area from the position of the discharge side first and second openings (47a) and (47b) to the lower side of the outer peripheral edge is formed by the cover member (37). The discharge chamber (37a) (37b) is formed by being covered and surrounded by the cover member (37) and the disk portion (45). A vertical partition wall (42) for partitioning the central opening of the disk portion (45) is integrally formed up to the vicinity of the lower side of the disk portion (45), and the discharge chamber is formed by the vertical partition wall (42). It is partitioned into a chamber (37a) and a second discharge chamber (37b).

  The first and second discharge chambers (37a) and (37b) are each formed in a divergent shape from the center portion of the disc portion (45) toward the outer peripheral edge portion. In the first discharge chamber (37a), the inner peripheral side communicates with the discharge-side first opening (47a), and the outer peripheral side (lower side) is opened outward (downward) via the discharge chamber outlet (38a). Yes. Further, the second discharge chamber (37b) has an inner peripheral side that communicates with the discharge-side second opening (47b), and an outer peripheral side that opens outward (downward) via the discharge chamber outlet (38b).

  A rear protrusion (48) is formed on the outer peripheral edge of the disk portion (45) over the entire circumference, and locking protrusions (49) are formed at three locations on the inner peripheral side of the rear protrusion (48). ) Projecting at a predetermined interval in the circumferential direction (see FIG. 7).

  Furthermore, a plurality of locking grooves (39) are formed at predetermined intervals along the circumferential direction on the outer peripheral end surface of the disk portion (45). Each locking groove (39) is formed so that only one end in the circumferential direction is opened on the front side (inlet side) and the back side extends in the circumferential direction, and is viewed from the side (outer diameter direction). It is formed in an L shape in the state.

  As shown in FIGS. 10 to 12, a small-diameter pin hole (35b) is provided on the upper side of the disk part (45) in the unit main body (4), and the pin hole (35b) is covered from the front side. Thus, the pin insertion member (35) is attached to the front surface of the disk part (45). The pin mounting member (35) has a plurality of elastic pieces (35c) extending rearward by forming a region corresponding to the small-diameter pin hole (35b) in a folded shape on the inside. . A large-diameter pin hole (35a) is formed surrounded by the plurality of elastic pieces (35c). The large-diameter pin hole (35a) has a larger inner diameter than the small-diameter pin hole (35b) on the disk part (45) side.

  On the other hand, the lock pin (30) inserted into the pin holes (35a) (35b) is a short one made of a synthetic resin molded product having elasticity. The lock pin (30) has a half length region portion on the distal end side as a shaft portion (30b), and the remaining half length region portion on the proximal end side has an outer diameter larger than that of the shaft portion (30b). It is configured as a large diameter head (30a) having a large size. The outer diameter of the large-diameter head (30a) is formed in a size corresponding to the inner diameter of the large-diameter pin hole (35a) of the unit body (4), and the outer diameter of the shaft (30b). Is formed in a size corresponding to the inner diameter of the small-diameter pin hole (35b).

  The front end surface of the large-diameter head (30a) of the lock pin (30) is provided with a knob (30e). As will be described later, when the lock pin (30) is pulled out from the lock recess (26). In addition, the lock release operation can be easily performed by picking and pulling the knob (30e) with a pinching tool such as tweezers.

  The lock pin (30) having this configuration is forcibly inserted into the pin hole (35a) (35b) of the unit main body (4) from the front side to be set in the unit main body (4). Is done. When the lock pin (30) is assembled, the outer peripheral surface of the large-diameter head (30a) is separated from the periphery by a plurality of elastic pieces (35c) constituting the inner peripheral surface of the large-diameter pin hole (35a). It is held so as to be sandwiched elastically. Thus, the lock pin (30) is allowed to move freely in the front-rear direction while allowing movement in the front-rear direction (axial direction) by an operator's intentional operation. Furthermore, the lock pin (30) has a lock position (see FIG. 10 (a)) pushed into the back part (rear) and a lock release position (see FIG. 10 (b)) drawn into the front (front). It can be fixed at any position.

  In the present invention, when the lock pin (30) is pulled out, the lock pin (30), the pin mounting member (35) and the like are provided with a drop prevention means so that the lock pin (30) does not fall off. Also good.

  As shown in FIGS. 4, 6, and 9, the valve support member (5) of the flow path forming unit (3) is configured such that the front side portion is configured as a cylindrical front fitting tube portion (51) and the rear side portion. Is configured as a cylindrical rear side small cylinder part (55) having a smaller diameter than the front fitting cylinder part (51).

  The front fitting cylinder (51) has a front end opening (tip opening) partitioned into four quarter-shaped openings by a vertical partition (52) and a horizontal rail (53). Of these four openings, when viewed from the front side (toward FIG. 9), the upper left opening is configured as a suction side first opening (56a), and the upper right opening is configured as a suction side second opening (56b). The Further, the lower right opening is configured as a discharge side second opening (57b), and the lower left opening is configured as a discharge side first opening (47a).

  The horizontal beam (53) is configured as a valve support beam that supports sheet-like valve members (7) and (7), which will be described later. On the front side of the horizontal beam (53), the unit main body (4) Corresponding to the pin stop hole (44) of the horizontal rail (43), the valve stop pin (54) is provided so as to protrude forward.

The inside of the front fitting tube portion (51) is divided into right and left by the vertical partition wall (52), and the left half portion as viewed from the front side is configured as a first half flow channel (51a), and the right side The first half channel (51a) is configured as a second half channel (51b) that is non-conductive to the first half channel (51a). ) And the discharge side first opening (47a), and the second half channel (51b) is connected to the suction side second opening (56b) and the discharge side second opening (47b). .

  Further, the first half channel (51a) is communicated with the inside of the rear small diameter cylinder portion (55). In addition, corresponding to the second half channel (51b) of the front fitting cylinder part (51), the connecting part of the front fitting cylinder part (51) and the rear diameter small cylinder part (55) has a through hole ( 51c) is formed, and the second half channel (51b) of the front fitting cylinder part (51) is connected to the outside of the small diameter cylinder part (55) on the rear side through the through hole (51c), that is, It communicates with an annular flow path (second flow path B) between the in-tank mounting member (2) and the rear-side small cylinder portion (55). In addition, the 2nd half part flow path (51b) of a front side fitting cylinder part (51) is a non-conduction state with respect to the inside of a rear side small cylinder part (55).

  Further, the front fitting tube portion (51) of the valve support member (5) is formed such that the outer diameter dimension thereof corresponds to the inner diameter dimension of the cylindrical portion (41) in the unit body (4). The fitting tube portion (51) can be fitted into the cylindrical portion (41) of the unit body (4). In this fitting state, the valve stopper pin (54) of the front fitting cylinder part (51) can be inserted into the pinning hole (44) of the unit main body (4), and 4 of the front fitting cylinder part (51). The two openings (56a) (56b) (57a) (57b) can be arranged corresponding to the four openings (46a) (46b) (47a) (47b) of the unit body (4).

  As shown in FIG. 4 and the like, a circumferential groove is formed on the outer periphery of the rear side small cylinder portion (55), and a synthetic rubber O-ring (81) is accommodated in the circumferential groove. Yes. The O-ring (81) has an outer peripheral surface of the small diameter cylindrical portion (55) on the rear side of the valve support member (5) in the flow path forming unit (3) in a state where the hot water supply adapter is assembled as described later, It is interposed between the inner peripheral surface of the inner cylinder part (11) in the tank outer attachment member (1) and is designed to achieve watertightness therebetween.

  The fastening ring (6) of the flow path forming unit (3) is integrally provided with a screwed part (61) constituted by the front side part and a seal part (65) constituted by the rear side part. The threaded portion (61) is formed in a size corresponding to the front fitting tube portion (51) in the valve support member (5), and the seal portion (65) has an outer diameter dimension larger than that of the threaded portion (61). The outer diameter dimension is formed to a size corresponding to the inner diameter dimension of the in-tank mounting member (2).

  Further, on the outer peripheral surface of the screwed portion (61), a male screw (61a) is engraved corresponding to the female screw (41a) of the cylindrical portion (41) in the unit body (4).

  As shown in FIG. 4 and the like, a circumferential groove is formed on the outer periphery of the seal portion (65), and a synthetic rubber O-ring (85) is accommodated in the circumferential groove. The O-ring (85) includes an outer peripheral surface of the tightening ring (6) in the flow path forming unit (3) and an inner periphery of the in-tank mounting member (2) in a state where the hot water supply adapter is assembled as will be described later. It is interposed between the two surfaces so as to achieve watertightness therebetween.

  On the other hand, as shown in FIG. 6 and the like, the sheet-like first and second valve members (7a) and (7b) incorporated in the flow path forming unit (3) are formed into a substantially circular shape when two are combined. Each has a substantially semicircular shape. As for each valve member (7a) (7b), while each upper part is comprised as a 1st, 2nd suction valve (76a) (76b), a lower side part is the 1st, 2nd discharge valve (77a) (77b). ). The part (connecting part) between the valves in each valve member (7a) (7b) is configured as a fixing allowance (73) for fixing the valve member (7a) (7b) to the flow path forming unit (3). In addition, a pin insertion hole (74) is formed in the fixing allowance (73) corresponding to the valve stop pin (54).

  This sheet-like valve member (7a) (7b) is assembled | attached to a flow-path formation unit (3) as follows.

  That is, in a state where the flow path forming unit (3) is disassembled, the valve members (7a) and (7b) are installed on the front end face of the front fitting cylinder portion (51) in the valve support member (5). At this time, by inserting the valve stop pin (54) of the horizontal rail (53) in the front fitting tube portion (51) into the pin insertion hole (74) of the valve members (7a) and (7b), the valve member ( 7a) and 7b can be temporarily held by the valve support member (5).

  The valve support member (5) temporarily holding the valve members (7a) and (7b) is fitted into the cylindrical portion (41) of the unit body (4) from the rear end opening, and the valve members (7a) and (7b) are inserted. The unit body (4) is disposed so as to correspond to the openings (46a), (46b), (47a), (47b) of the disk part (45), and the valve stop pin (54) of the valve support member (5) is attached to the unit body ( 4) Insert into the pinning hole (44).

  Next, the male screw (61a) on the outer periphery of the tightening ring (6) is screwed onto the female screw (41a) on the inner periphery of the rear end of the cylindrical portion (41) of the unit body (4), thereby tightening. Screw the ring (6) firmly into the cylindrical part (41) of the unit body (4). As a result, the front end surface of the screw-in portion (61) in the tightening ring (6) is pressed against the rear end surface of the front-side fitting tube portion (51) in the valve support member (5), thereby (53) is pressed against the horizontal rail (43) of the unit body (4) through the fixing margin (73) of the valve members (7a) and (7b), and the valve stop pin (54) of the valve support member (5) is Then, the unit body (4) is fully inserted into the pinning hole (44). In this way, the fixing allowances (73) and (73) of the valve members (7a) and (7b) are sandwiched between the horizontal beam (43) of the unit body (4) and the horizontal beam (53) of the valve support member (5). .

  In the flow path forming unit (3) assembled in this way, the suction side openings (56a) (56b) of the valve support member (5) are connected to the suction valves (76a) (76b) of the valve members (7a) (7b). ) And the discharge side openings (57a) and (57b) of the valve support member (5) are arranged with respect to the discharge valves (77a) and (77b) of the valve members (7a) and (7b). The

  Further, in this assembled state, the suction valve (76a) (76b) of the valve member (7a) (7b) has an outer peripheral edge portion on the suction side opening (46a) in the disk portion (45) of the unit body (4). Joined to the peripheral portion of (46b), the peripheral portion functions as a valve seat portion of the suction valves (76a) and (76b). Further, the suction valves (76a) and (76b) are pressed from the front side by a valve pressing piece (4c) provided in the unit main body (4) to restrict forward swing and swing backward. Is allowed. Therefore, when water is going to flow in the direction (suction direction) from the front side of the disk portion (45) toward the inside of the valve support member (5), the suction valves (76a) and (76b) While swinging backward (suction direction) to open the suction side openings (46a) (46b) (56a) (56b), conversely from the inside of the valve support member (5) to the front side of the disk part (45) When the water is about to flow in the direction (discharge direction), the suction valve (76a) (76b) has a peripheral edge of the suction side opening (46a) (46b) in the disk part (45). The suction side openings (46a) (46b) (56a) (56b) are maintained in a closed state by being engaged with the portion and being received by the valve pressing piece (4c). That is, the suction valves (76a) and (76b) function as a one-way valve (backflow prevention valve) that allows water in the suction direction to flow and prevents water flow (backflow) in the discharge direction.

  Further, the discharge valve (77a) (77b) of the valve member (7a) (7b) has an outer peripheral edge portion of the discharge side opening (57a) (57b) of the front fitting tube portion (51) in the valve support member (5). ) And the peripheral portion functions as a valve seat portion of the discharge valve (77a) (77b). Further, the discharge valves (77a) and (77b) are pressed from the rear side by a valve pressing piece (5c) provided on the valve support member (5), and are controlled to swing backward and swing forward. Movement is allowed. Therefore, when the water is about to flow in the discharge direction, the discharge valves (77a) and (77b) swing forward (discharge direction) by the water pressure, and discharge side openings (47a), (47b) and (57a). ) (57b) is opened while water is about to flow in the discharge direction, the discharge valve (77a) (77b) has an outer peripheral edge at the discharge side opening ( The discharge side openings (47a), (47b), (57a), and (57b) are kept closed by engaging with the peripheral edge portions of 57a) and (57b) and being received by the valve pressing piece (5c). That is, the discharge valves (77a) and (77b) function as a one-way valve (backflow prevention valve) that allows the water in the discharge direction to flow and prevents the water in the suction direction (backflow).

  Here, in the present embodiment, the first suction chamber (36a) of the unit body (4), the first suction side opening (46a), and the first suction side opening of the valve support member (5) in the flow path forming unit (3). (56a) constitutes the first suction flow path, the second suction chamber (36b) of the unit body (4), the suction side second opening (46b), and the suction side second of the valve support member (5). The second suction flow path is configured by the opening (56b). Further, the first discharge flow path is constituted by the first discharge chamber (37a) of the unit body (4), the discharge side first opening (47a), and the discharge side first opening (57a) of the valve support member (5). In addition, the second discharge flow path is configured by the second discharge chamber (37b) of the unit body (4), the discharge side second opening (47b), and the discharge side second opening (57b) of the valve support member (5). The Furthermore, an internal flow path is constituted by the first and second suction flow paths and the first and second discharge flow paths.

  In order to assemble the flow path forming unit (3) having the above configuration to the mounting members (1) and (2) attached to the bathtub wall (W), the flow path forming unit (3) is disposed in its discharge chamber (37a) ( 37b), the discharge chamber outlets (38a) and (38b) are arranged on the lower side so as to be fitted into the in-tank mounting member (2), and the rear side small cylinder portion (55) of the valve support member (5) ) Is inserted into the inner tube portion (11) of the outside-tank mounting member (1) that has entered the inside-tank mounting member (2).

  Then, while the rear protruding edge (48) of the disk part (45) in the flow path forming unit (3) is externally fitted to the flange part (25) of the in-tank mounting member (2) from the front side, the flow path forming unit The (3) side locking projection (49) is inserted into the locking groove (27) on the tank mounting member (2) side from the front side. Thereafter, the flow path forming unit (3) is twisted in a small amount in the circumferential direction, so that the locking projection (49) on the flow path forming unit (3) side is moved in the circumferential direction from the inlet side of the locking groove (27). The flow path forming unit (3) cannot be pulled out in the front-rear direction with respect to the in-tank mounting member (2).

  Subsequently, by applying a pressing force from the outside (front side) to the large-diameter head (30a) of the lock pin (30) assembled in advance in the flow path forming unit (3), the pin hole (35a) ( 35b). Then, by the pushing movement of the lock pin (30), as shown in FIG. 10 (a), the tip of the shaft portion (30b) fits into one of the corresponding lock recesses (26) in the in-tank mounting member (2). Include. As a result, the flow path forming unit (3) cannot be twisted with respect to the in-tank mounting member (2), so that the assembly of the flow path forming unit (3) with the in-tank mounting member (2) On the other hand, it can be prevented from being released.

  Thus, in the state which assembled | attached the flow-path formation unit (3) to attachment member (1) (2), the 1st outer pipe connection part (1a) of the tank outer attachment member (1) is the inner cylinder part (11). Through the interior of the rear diameter small cylinder portion (55) of the valve support member (5) in the flow path forming unit (3), and the rear diameter small cylinder portion (55) is connected to the front side It communicates with the first half channel (51a) of the fitting cylinder (51). Further, the upper half of the first half channel (51a) of the front fitting cylinder (51) is communicated with the first suction chamber (36a) through the suction side first openings (56a) and (46a). In addition, the lower side portion communicates with the first discharge chamber (37a) via the discharge-side first openings (57a) and (47a).

  In addition, the second outer pipe connecting portion (1b) of the tank outer attachment member (1) has a small rear side diameter in the flow path forming unit (3) through the space between the inner cylindrical portion (11) and the outer cylindrical portion (12). The annular channel is communicated with the annular channel between the cylinder part (55) and the in-tank mounting member (2), and the annular channel passes through the through-hole (51c) as described above, and the second fitting cylinder part (51) It communicates with the two half channel (51b). Further, the second half channel (51b) of the front fitting tube portion (51) is communicated with the second suction path (36b) through the suction side second openings (56b) and (46b) at the upper side thereof. In addition, the lower side portion communicates with the second discharge chamber (37b) through the discharge-side second openings (57b) and (47b).

  Here, in the present embodiment, the first outer pipe connecting portion (1a), the inner cylindrical portion (11), and the rear diameter small cylindrical portion (55) of the flow path forming unit (3) of the outer tank attachment member (1). The first flow path (A) is constituted by the first half flow of the front fitting tube portion (51) in the flow path forming unit (3) as described above. It communicates with the road (51a). Furthermore, the second flow path (B) is formed by the second outer pipe connecting portion (1b), the rear side small diameter tube portion (55) of the tank outer mounting member (1), and the annular flow path of the tank inner mounting member (2). As described above, this second flow path (B) is communicated with the second half flow path (51b) of the front fitting cylinder (51b) in the flow path forming unit (3).

  As shown in FIGS. 1 to 4, the filter member (9) has a dish shape, and the circular front wall (91) has a large number of suction holes (96) penetrating the front and back surfaces. Is formed over. Further, the lower side portion of the peripheral edge portion (92) protruding rearward from the front wall portion (91) corresponds to the outlets (38a) (38b) of the discharge chambers (37a) (37b) in the flow path forming unit (3). Thus, a discharge port (97) is formed. Further, on the inner peripheral side surface of the peripheral edge portion (92), a locking projection (98) protruding in the inner diameter direction is provided in the circumferential direction corresponding to the L-shaped locking groove (39) of the flow path forming unit (3). A plurality are formed at predetermined intervals (see FIG. 4).

  While the filter member (9) is externally fitted from the front side of the disk portion (45) of the unit body (4) in the flow path forming unit (3), the locking projection (98) of the filter member (9) is It inserts into the locking groove (39) on the flow path forming unit (3) side from the front side. Thereafter, the filter member (9) is twisted by a small amount in the circumferential direction, so that the locking protrusion (98) of the filter member (9) is displaced in the circumferential direction from the inlet side of the locking groove (39). So that the filter member (9) cannot be removed in the front-rear direction with respect to the flow path forming unit (3).

  In addition, since it is better that the user can easily remove the filter member (9) so that it can be easily cleaned, a lock mechanism for restricting rotation is not particularly required.

  With the filter member (9) thus attached, the front end open portion of the suction chamber (36a) (36b) of the flow path forming unit (3) faces the front wall portion (91) of the filter member (9). Be placed. Therefore, the water sucked from the suction hole (96) of the front wall portion (91) is sucked into the flow path forming unit (3) through the suction chambers (36a) and (36b).

  Furthermore, the outlets (38a) and (38b) of the discharge chambers (37a) and (37b) in the flow path forming unit (3) are arranged corresponding to the discharge ports (97) of the filter member (9). Therefore, the water in the flow path forming unit (3) passes through the discharge chambers (37a) and (37b) and is discharged from the discharge port (97) into the bathtub.

  In the hot water supply port adapter having the above configuration, the assembling procedure to the bathtub (T) is not particularly limited, and for example, it is assembled as follows.

  First, before working on site, the flow path forming unit (3) is assembled in advance with the valve members (7a) and (7b) incorporated as described above. In addition, as for this flow path formation unit (3), it is usual that the lock pin (30) is also assembled | attached to the pin hole (35a) (35b), and also the lock pin (30) protrudes ahead. It is good to arrange in the state which was made to move, ie, the unlocked state.

  Subsequently, on the site, the tank external mounting member (1) is disposed at a position corresponding to the mounting hole (H) on the outer wall surface of the bathtub (T), and the cylindrical portion (21 of the tank internal mounting member (2) (21). ) Is inserted into the mounting hole (H) from the inside of the bathtub (T) and screwed into the outer cylinder portion (12) of the external mounting member (1).

  Next, the flow path forming unit (3) is inserted into the in-tank mounting member (2) and twisted to keep the flow path forming unit (3) in the retaining state in the in-tank mounting member (2). Assemble.

  Subsequently, the lock pin (30) of the flow path forming unit (3) is pushed in, and the lock pin (30) is fitted into and engaged with the lock recess (26) of the in-tank mounting member (2). Try to prevent the rotation of (3).

  Next, the filter member (9) is externally fitted to the disk portion (45) of the flow path forming unit (3) and twisted, so that the filter member (9) is turned into the flow path forming unit (3). Assemble in the retaining state.

  In the hot water outlet adapter assembled to the bathtub (T) in this manner, the pipe from the outdoor water heater is connected to the outer pipe connecting portion (1a) (1b) of the outside mounting member (1) to form a bathtub system. Is done.

  In this bathtub system, when performing hot water processing for storing hot water in the bathtub (T), hot water is supplied to both of the two outer pipe connection portions (1a) and (1b), and two flow paths (A ) (B) supplies hot water to the bathtub (T). That is, warm water passes through the first and second flow paths (A) and (B) of the mounting members (1) and (2), and passes through the first and second half flow paths (51a) of the flow path forming unit (3). 51b). The hot water introduced into the first and second half flow passages (51a) (51b) is introduced into the discharge chambers (37a) (37b) through the discharge valves (77a) (77b), and the discharge ports ( 97) to be supplied into the bathtub.

  On the other hand, when performing the reheating process which reheats the hot water in a bathtub (T), the side connected to the outgoing pipe of an outdoor water heater among two flow paths (A) and (B) of a hot water supply adapter The channel on the side connected to the return pipe functions as the suction side channel. For example, the forward pipe is connected to the first outer pipe connection portion (1a), the first flow path (A) becomes the hot water supply side flow path, and the return pipe is connected to the second outer pipe connection section (1b) to connect the second flow. When the pipe (B) is pipe-connected so as to be a suction side flow path, the hot water supplied from the water heater passes through the first flow path (A) and passes through the first flow path forming unit (3). It is introduced into one half channel (51a), from there through the discharge valve (77a), introduced into the first discharge chamber (37a), and supplied into the bathtub through the discharge port (97). .

  Further, in the suction side flow path, the second half flow path (51b) and the second suction chamber (37b) become negative pressure in accordance with the negative pressure of the return pipe of the outdoor water heater and the second flow path (B). . For this reason, it flows into the 2nd suction chamber (37b) of a flow-path formation unit (3) via the suction hole (96) of a filter member (9) with the water pressure in a bathtub, and the 2nd suction valve (76b) ) And then into the second half channel (51b) and then return to the outdoor water heater through the second channel (B).

  In addition, since the 1st half flow path (51a) of a flow path formation unit (3) becomes a hot water supply side flow path, and is pressurized, the 1st suction valve (51a) corresponding to the 1st half flow path (51a) ( 76a) is kept closed. Accordingly, it is possible to reliably prevent a problem that the hot water in the bathtub flows backward from the first suction chamber (36a) to the first half channel (51a).

  On the other hand, when the forward pipe and the return pipe of the outdoor water heater are connected to the two flow paths (A) and (B) of the hot water supply adapter in reverse to the above, each flow path (A) (B ) Is circulated in the opposite direction to the above, and a reheating process (forced circulation) is performed.

  By the way, in the hot water supply adapter with a built-in valve provided with valves (76a), (76b), (77a), and (77b) like the hot water supply adapter of the present embodiment, foreign matters such as dust and hair floating in the bathtub. However, the hot water supply process may not be performed smoothly because it is sucked at the time of reheating and entangled and entangled with the periphery of the valve part to obstruct the operation of the valve part. Thus, when a malfunction arises in a valve part, in the hot-water supply adapter of this embodiment, cleaning and replacement | exchange of a valve part can be performed easily, and the malfunction of a valve part can be eliminated easily.

  That is, in the hot water supply adapter of this embodiment, when cleaning or replacing the valve portion, first, the filter member (9) is twisted to disengage the flow path forming unit (3), and the filter Remove member (9). Next, the lock pin (30) of the flow path forming unit (3) is pulled out to the front using a tool such as tweezers to release the lock, and is attached to the in-tank mounting member (2) of the flow path forming unit (3). Release the detent. Thereafter, the flow path forming unit (3) is twisted to release the engagement with the in-tank mounting member (2), and the flow path forming unit (3) is taken out.

  After removing the flow path forming unit (3), the clamping ring (6) is removed by rotating the unit ring (6) in the direction of loosening the screws, and then the valve support member (5) is removed from the unit body (4). Extract from. When the valve support member (5) is extracted in this way, the valve members (7a) and (7b) held by being stuck into the valve stop pins (54) of the valve support member (5) are also taken out from the unit body (4). be able to.

  Thus, the valve members (7a) and (7b) are taken out to the outside, and the valve members (7a) and (7b) are cleaned or replaced as necessary to repair the valve members (7a) and (7b).

  After the valve portion is repaired, the flow path forming unit (3) is assembled and then attached to the in-tank attachment member (2) and the filter member (9) may be attached in the same manner as described above.

  As described above, the hot water supply adapter according to the present embodiment is configured so that the flow path forming unit (3) can be assembled without using an adhesion process or a welding process, and can be easily disassembled. This makes it possible to easily repair the valve members (7a) and (7b) in the unit (3).

  Particularly in the flow path forming unit (3) of the present embodiment, the valve support member (5) is pressure-tightened to the unit main body (4) by a tightening ring (6) that can be screwed into the unit main body (4). Therefore, the flow path forming unit (3) can be easily disassembled and assembled by simply rotating the fastening ring (6), and the repair work of the valve members (7a) and (7b) can be further improved. It can be done easily.

  Moreover, in this embodiment, since the flow path forming unit (3) can be easily disassembled, the maintenance and inspection of each component constituting the flow path forming unit (3) can be easily performed by the disassembly. .

  Furthermore, since the flow path forming unit (3) is composed of a plurality of parts that can be disassembled, when replacing parts due to deterioration, damage, etc., only the parts that need to be replaced are replaced. It is only necessary to replace these parts, the parts can be used effectively, and the cost can be reduced.

  Further, in this embodiment, the flow path forming unit (3), which is designed to prevent the axial attachment in the tank mounting member (2) by twisting operation, is rotated by pushing the lock pin (30). Since it is designed to be stopped, the flow path forming unit (3) can be easily assembled simply by performing a twisting operation and a pin pushing operation, and easily by simply performing a pin pulling operation and a twisting operation. Can be removed.

  In particular, in the present embodiment, since the removal operation of the flow path forming unit (3) can be easily performed, the repairing operation of the valve part accompanied by the removal operation can be more easily performed.

  In this embodiment, since the sheet-like valve members (7a) (7b) in which the suction valves (76a) (76b) and the discharge valves (77a) (77b) are integrated are used, one valve member is used. (7a) (7b) can be attached and detached by simply attaching and removing the suction valves (76a) and (75b) and the discharge valves (77a) and (77b). Cleaning and replacement work can be easily performed.

  Further, since the suction valves (76a) (76b) and the suction discharge valves (77a) (77b) are integrally formed, the number of parts can be reduced, and the assembly and disassembly of the flow path forming unit (3) can be further improved. It can be done easily.

  Moreover, since the hot water supply adapter of this embodiment is a double conveyance type that supplies hot water in the bathtub (T) using two flow paths (A) and (B) when hot water is applied, hot water is efficiently supplied. Can be stored.

  In the above embodiment, the flow path forming unit is constituted by three parts (unit body, valve support member and clamping ring) except for the valve member, the lock pin, etc., but the present invention is not limited to this. The number of parts constituting the flow path forming unit is not particularly limited as long as it is two or more.

  Furthermore, in the above embodiment, the components of the flow path forming unit are connected by screwing operation of the tightening ring, but in the present invention, the connecting method of each component of the flow path forming unit is particularly The connection is not limited, and any method may be used. For example, the flow path forming unit may be configured such that a second unit part such as a valve support member is screwed and fixed to a first unit part such as a unit body, and the second unit part is attached to the first unit part. You may make it fix using a screw.

  Further, in the above embodiment, the case where the present invention is applied to a non-polar type hot water supply adapter has been described as an example. However, the present invention is configured so that the forward pipe and the return pipe connected to the hot water heater are set in advance. It can also be applied to a polar type hot water supply adapter.

  Moreover, in the said embodiment, although it comprises so that water may be suck | inhaled from the front surface of a filter member and water may be discharged from an outer peripheral surface, this invention is not restricted only to it. For example, water may be sucked from the outer peripheral surface of the filter member. Furthermore, water may be discharged from the gap between the filter member and the inner wall surface of the bathtub, or water may be discharged from the front surface of the filter member.

  Further, in the above-described embodiment, the forced circulation type apparatus that can be repelled has been described as an example. However, the present invention can also be applied to a hot water supply adapter that performs only hot water storage processing such as hot water.

  The hot-water port adapter for bathtubs according to the present invention can be used as a hot-water port device that is assembled to a bathtub wall when hot water is supplied from an outdoor water heater into the bathtub.

It is side surface sectional drawing which shows the hot-water port adapter for bathtubs which is embodiment of this invention. It is a plane sectional view showing a hot-water supply adapter of an embodiment. It is a perspective view which decomposes | disassembles and shows the hot-water supply port adapter of embodiment. It is side surface sectional drawing which decomposes | disassembles and shows the hot water supply adapter of embodiment. It is a perspective view which expands and shows the flange part of the attachment member in a tank in the hot-water supply port adapter of embodiment. It is a perspective view which decomposes | disassembles and shows the flow-path formation unit in the hot-water supply port adapter of embodiment. It is a rear view which shows the flow-path formation unit of embodiment. It is a front view which shows the unit main body in the flow-path formation unit of embodiment. It is a front view which shows the valve support member in the flow-path formation unit of embodiment. It is a figure which expands and shows the lock pin periphery in the hot-water supply port adapter of embodiment, Comprising: The figure (a) is sectional drawing in a locked state, The figure (b) is sectional drawing in a lock release state. It is a perspective view which shows the lock pin mounting member applied to the hot-water supply port adapter of embodiment. It is a figure which shows the lock pin of embodiment, Comprising: The figure (a) is a front view, The figure (b) is side sectional drawing.

Explanation of symbols

1 ... Outside tank attachment member (attachment member)
2 ... In-tank mounting member (mounting member)
25 ... Flange part 26 ... Lock recess (lock part)
27 ... Locking groove 3 ... Flow path forming unit 30 ... Lock pins 35a, 35b ... Pin holes 36a, 36b ... Suction flow paths 37a, 37b ... Discharge flow path 4 ... Unit body (first unit part)
41 ... Cylindrical part 43 ... Horizontal beam (valve support beam)
45 ... disk portions 46a, 46b ... suction side openings 47a, 47b ... discharge side openings 48 ... rear protrusion 49 ... locking projection 5 ... valve support member (second unit part)
51 ... Fitting cylinder part 53 ... Horizontal crosspiece (valve support crosspiece)
56a, 56b ... suction side opening (tip opening)
57a, 57b ... discharge side opening (tip opening)
6 ... Tightening rings 7a, 7b ... Valve member 73 ... Fixing allowance (connection part)
76a, 76b ... Suction valves 77a, 77b ... Discharge valve H ... Mounting hole T ... Bathtub W ... Bathtub wall

Claims (9)

The attachment member attached in a penetrating manner to the attachment hole of the bathtub wall is detachably attached to the flow path forming unit from the inside of the tank, and the water supplied to the flow path forming unit through the attachment member from the outside of the tank, It is a hot water outlet adapter for bathtubs to be discharged into the tank,
The flow path forming unit includes a first unit component and a second unit component that is removably assembled to the first unit component.
A backflow prevention valve is provided in the internal flow path for circulating water in the flow path forming unit,
The hot water outlet adapter for a bathtub, wherein the first and second unit parts are separated at a portion where the check valve is installed.   The hot water inlet adapter for a bathtub according to claim 1, wherein the first and second unit parts are held in an assembled state without using an adhesion process or a welding process.   The hot water inlet adapter for bathtubs according to claim 1 or 2, wherein the backflow prevention valve is sandwiched between the first and second unit parts and assembled to the flow path forming unit. The internal flow paths are first and second discharge flow paths through which water supplied from outside the tank is circulated and discharged into the tank, and first and second flow paths through which water sucked from the tank is flowed out. A second suction flow path,
The backflow prevention valve includes first and second discharge valves provided on the first and second discharge flow paths, and first and second suction valves provided on the first and second suction flow paths. The hot water inlet adapter for bathtubs according to any one of Items 1 to 3. Of the first and second discharge valves and the first and second suction valves, a first valve member in which any two backflow prevention valves are integrally formed and the remaining two backflow prevention valves are integrally formed. A second valve member,
The connection part between two backflow prevention valves in the first valve member and the connection part between two backflow prevention valves in the second valve member are clamped by the first and second unit parts. Hot water inlet adapter for bathtubs as described.   The said 1st, 2nd valve member has a sheet-like shape, One side area | region is comprised as one backflow prevention valve, The other side area | region is comprised as the other backflow prevention valve of Claim 5. Hot water outlet adapter for bathtubs. The first unit component has a disk part having an opening in the center, and a cylindrical part provided corresponding to the opening on the rear surface side of the disk part, and a valve support bar is provided in the opening of the disk part. Provided,
The second unit part has a fitting cylinder part on the front side thereof, and a valve support bar is provided at a front end opening of the fitting cylinder part,
The first and second unit parts are assembled in a state in which the fitting cylinder part of the second unit part is inserted into the cylindrical part of the first unit part and pressed against the disk part, and the disk part The hot water inlet adapter for bathtubs according to claim 6, wherein a connecting portion of the valve member is sandwiched between the valve support bar on the side and the valve support bar on the fitting head side. The flow path forming unit includes a tightening ring that can be screwed into the cylindrical portion of the first unit component,
The bathtub according to claim 7, wherein the fastening ring is screwed into and fixed to the cylindrical portion of the first unit component so that the fitting cylindrical portion of the second unit component is pressed against the disk portion side. Hot water outlet adapter. The mounting member includes an outer tank mounting member disposed on the outer side of the tank and an inner tank mounting member that is mounted on the outer mounting member from the inner side of the tank through the mounting hole. It has a flange portion arranged at the peripheral portion of the mounting hole, and a plurality of L-shaped locking grooves are provided on the outer peripheral end surface of the flange portion at intervals in the circumferential direction.
The flow path forming unit is provided with a disc portion, a rear projecting edge portion provided to extend rearward at an outer peripheral edge portion of the disc portion, and an inner circumference of the rear projecting edge portion with a circumferential interval. A plurality of locking projections,
The flow path forming unit is connected to the in-tank mounting member so as not to come out in the front-rear direction by inserting the locking protrusion into the locking groove and twisting the locking projection.
A pin hole penetrating in the front-rear direction is formed in the disk portion, and the tip end portion of the lock pin inserted in the pin hole so as to be able to advance and retreat is inserted into the lock portion provided on the front surface of the flange portion of the in-tank mounting member. The hot water inlet adapter for bathtubs according to any one of claims 1 to 8, wherein the flow path forming unit is connected to the in-tank mounting member so as not to be relatively rotatable.

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