JP4819535B2 - Bathtub adapter - Google Patents

Description

  The present invention relates to a hot water inlet adapter for a bathtub that is attached to a bathtub wall portion in a penetrating state and is pipe-connected to a hot water heater outside the bathtub.

In recent years, as a hot water supply system for a bathtub, a hot water function that sends hot water boiled in a hot water heater installed outside the bathtub into the bathtub, sucks the hot water in the bathtub, sends it to the hot water heater, and heats the hot water to heat the hot water. As such, those having a reheating function for returning to the bathtub are becoming popular. And in such a hot water supply system, the piping of the circulation channel between hot water supply machines is connected to the hot water supply port adapter attached to the bathtub wall part in the penetration state (patent documents 1 and 2).
Japanese Patent Laid-Open No. 11-201558 JP-A-11-337186

  The above hot water supply adapter is arranged inside the tank, with the suction port on the front, sucking hot water in the bathtub through a porous filter and sending it to the hot water supply, while hot water supplied from the hot water supply is In general, a discharge port formed in a substantially downward slit shape is discharged so as to expand downward in a fan shape along the wall surface of the bathtub.

  By the way, the hot water supply adapter having the above functions includes a flow path forming unit for forming a predetermined flow path, an in-tank mounting member for mounting this on the inner surface of the side wall of the bathtub, Generally, four main parts are constituted of an outside tank attachment member for fixing the attachment member and a filter member detachably attached to the front surface side of the flow path forming unit.

  And the said attachment member in a tank has the flange part contact | abutted and arrange | positioned by the front end of the cylindrical part which penetrates a bathtub side wall at the inner surface side of a bathtub side wall, The said flow-path formation unit is provided in the front side of this flange part. The filter member is detachably attached to the flow path forming unit.

  Conventionally, in many cases, the flow path forming unit is attached to the flange portion of the in-tank mounting member by screwing a plurality of mounting screws toward the flange portion from the front side of the flow path forming unit. However, in this case, since a plurality of mounting screws must be set as accessory parts in addition to the main parts, in addition to the inconvenience of increasing the number of parts, the above-described operation for mounting the adapter to the bathtub at the construction site The mounting work using the mounting screws is a little cumbersome, and it takes a lot of time and effort.

  The present invention has been made in view of the circumstances as described above, and it is possible to more easily and efficiently perform the installation work of the adapter on the site, reduce the number of required parts, and eliminate construction errors. It is an object of the present invention to provide a technique for improving the coupling structure between the in-tank mounting member and the flow path forming unit, which can reduce the possibility of occurrence.

  The present invention solves the above problems by the following means.

  [1] A flow path forming unit 10, a tank outer mounting member 71, a tank inner mounting member 72, and a filter member 73 are provided, and the flow path forming unit 10 is in the rear end portion of the rear protruding edge portion 11c of the disk portion 1a. By inserting and winding a plurality of locking projections 19 provided on the peripheral surface into an L-shaped locking groove 77 provided on the outer periphery of the flange portion 72 b at the front end of the in-tank mounting member 72, A female screw hole 2a penetrating in the front-rear direction is formed at a position in the vicinity of the peripheral edge of the disk portion 1a of the flow path forming unit 10 and connected to the mounting member 72 in the front-rear direction. The end of the lock screw 85 threaded through is fitted into the lock hole 76 on the front surface side of the flange portion 72 b of the in-tank mounting member 72, so that the flow path forming unit 10 is in contact with the in-tank mounting member 72. Unrecoverable connection Bath hot water supply port adapter is characterized by comprising.

  [2] The lock screw 85 is made of an elastic synthetic resin, and the tip end portion of the shaft portion 85f is divided into a plurality of elastic leg pieces 85b by an axial slit groove 85a, and the outer surface of the tip end portion of the elastic leg piece 85b. Further, a retaining protrusion 85c that protrudes outward from the inner diameter of the screw thread of the female screw hole 2a is provided, and the retaining protrusion 85c remains in the female screw hole even when the male screw portion 85d is detached from the female screw portion of the female screw hole 2a. The hot water outlet adapter for bathtubs according to the preceding item [1], wherein the lock screw 85 is prevented from being pulled out by being locked to the rear end face of 2a.

  [3] A lock screw expansion projection 76 a is provided at the center of the bottom of the lock hole 76 on the tank mounting member 72 side, and the projection 76 a is fitted into the slit groove 85 a at the tip of the lock screw 85. The bathtub according to [1] or [2], wherein the elastic leg piece 85b is expanded outwardly and the outer peripheral surface of the retaining projection 85c is pressed against the inner peripheral surface of the lock hole 76. Hot water outlet adapter.

  According to the configuration described in [1] above, press the channel forming unit from the front side against the flange of the in-tank mounting member fixed in advance to the bath wall side wall, and then rotate it slightly. After engaging the locking groove and the locking protrusion, the flow path forming unit can be moved in the front-rear direction as well as in the rotational direction by screwing a lock screw, which is necessary and sufficient with only one, at a slight rotational speed. It can be mounted in a fixed state that does not displace. Therefore, the number of required parts can be reduced and the installation work at the site can be reduced compared to the case where the flow path forming unit is screwed and fixed to the flange of the tank mounting member using a plurality of mounting screws as in the past. Can be simplified to shorten the working time and labor. Of course, the lock screw only serves to prevent the flow path forming unit from rotating, so a relatively short screw with the tip fitted into the lock hole is sufficient. This can contribute to making the mounting parts extremely thin with a very low degree of protrusion, and can also complete the installation with a small number of rotations when the lock screw is installed. It can contribute to the improvement of work efficiency.

  The filter member on the front side is usually detachably attached to the flow path forming unit with a locking mechanism having an L-shaped locking groove and a locking projection. Even in the case of rotating and desorbing for cleaning and maintenance, the flow path forming member is reliably prevented from moving in the rotational direction by the lock screw. Can be done without.

  According to the configuration described in [2], by simply forcibly pushing the lock screw into the female screw hole, the elastic deformation is performed so that the plurality of elastic leg pieces at the tip of the shaft portion are pressed from around. The tip portion can be pushed through the female screw hole without hindrance and set in the flow path forming unit. After the assembly, the locking protrusion at the tip of the elastic leg piece acts so as to be hooked on the back end of the female screw hole, so that the lock screw may be unintentionally removed from the female screw hole. Absent. Therefore, the adapter can be supplied to the market with the lock screw assembled and set in advance in the flow path forming unit, which is advantageous not only for product packaging management, but also when the adapter is installed on site. The required installation work can be completed by screwing the lock screw attached to the forming unit as it is with a screwdriver, which is convenient for work frequently, and causes mistakes such as loss of the lock screw or forgetting to install it. May reduce fear.

  Further, according to the configuration described in [3] above, when the lock screw is tightened, the distal end portion of the elastic leg piece is pushed and expanded in the expanding direction so that the outer peripheral surface of the retaining protrusion is the inner periphery of the lock hole. Since the surface is pressed against the surface, the anti-rotation action of the flow path forming unit by the lock screw can be made more reliable and strong.

  Hereinafter, an embodiment of a hot water inlet adapter for bathtubs according to the present invention will be specifically described with reference to the drawings.

  In addition, the hot water supply adapter of this embodiment is a hot water (hot water storage) function that supplies hot water from a hot water heater (not shown) installed outside the bathtub into the bathtub, and the hot water in the bathtub is sucked into the hot water heater and heated. This is applied to a bathtub hot water supply system having a reheating function for returning the hot water into the bathtub, and as a so-called non-polar type, the connection to the forward pipe and the return pipe (not shown) connected to the water heater is reversed. Has the same functionality.

  As shown in the vertical side view of FIG. 1 and the exploded perspective view of FIG. 2, the hot water supply adapter includes four main components: a flow path forming unit 10, an outside tank attachment member 71, an inside tank attachment member 72, and a filter member 73. , The outer ring-shaped covering packing 81, the O-ring 82, the inner ring-shaped packing 83, the ring-shaped sliding sheet 84, and the accessory parts of the lock screw 85. In addition, H in a figure has shown the through-hole provided in the side wall Ta of the bathtub T. FIG.

  The flow path forming unit 10 forms a flow path as the above-mentioned non-polar type, and as shown in FIG. 3, the flow path branching section 1b ((B in FIG. )) And a unit body 1 made of a hard synthetic resin molding integrally formed with the flow path cylinder portion 1c, and a circular front plate 2 made of a hard synthetic resin molding fitted on the front side of the disk portion 1a. The valve seat frame 31 fitted to the valve part 3 in the center of the disk part 1a, and the first and second valve bodies 32A, 32B made of a vertically long rubber plate arranged in the flow path branch part 1b. I have.

  A protruding edge portion 11 protruding forward is formed on the upper half of the peripheral edge of the disk portion 1a of the unit body 1, and the front plate 2 and the disk portion are fitted and locked to the front edge side of the protruding edge portion 11. A compartment 10a is formed with 1a. In addition, L-shaped locking grooves 11a are formed in the outer periphery of the compartment 10a at two locations on the left and right sides, or at three locations including the lower portion.

  As shown in FIGS. 3 to 5, an opening portion 12 constituting the valve portion 3 is formed in the central portion of the disk portion 1 a of the unit main body 1, and the opening portion 12 includes a vertical partition wall 13 and left and right horizontal rails 14. , 14 is divided into four upper and lower flow passage holes 15a to 15d. The upper and lower channel holes 15a and 15b are opened rearward and outward at the channel branching portion 1b, while the upper and lower channel holes 15c and 15d are half of the vertical partition wall 13 of the channel branching unit 1b. It communicates with the inside of the rear cylindrical cylindrical tube 1c through a circular communication chamber 10b. Further, first and second discharge valve seats 33a and 33b facing the front surface are formed in the lower left and right flow passage holes 15b and 15d, respectively, by long vertical ribs in the middle of the left and right sides and the lower side of the opening edge. Has been.

  The valve seat frame 31 constitutes first and second suction valve seats 34a and 34b facing the rear side by being fitted to the upper side of the opening 12 of the unit main body 1 from the front, and is substantially semicircular. And has a pair of left and right channel windows 31a corresponding to each of the upper and left channel holes 15a, 15c, and has a projecting contact between the top and both left and right ends. A contact piece 31b is formed, and mounting holes 31c... Are provided at a total of four places, two at the center of the lower edge and at both the left and right sides.

  The first and second valve bodies 32A and 32B correspond to respective shapes in which the opening 12 of the unit body 1 is divided into left and right, and the upper half portions are respectively upper side as first and second suction valves 35a and 35b. The first and second discharge valves of the lower left and right flow path holes 15b and 15d have sizes that can be fitted into the left and right flow path holes 15a and 15c, and the lower half is the first and second discharge valves 36a and 36b. The size is set to fit into the seats 33a and 33b. Therefore, left and right mounting holes 32a and 32a and a lateral rib 32b between them are provided in the middle in the vertical direction of both valve bodies 32A and 32B.

  As shown in FIG. 3, the unit body 1 is provided with support pins 14 a... Protruding forward at both ends of the left and right horizontal rails 14, 14, and these support pins 14 a. The first and second valve bodies 32A, 32B are press-fitted into the mounting holes 32a, and further fitted into the mounting holes 31c of the valve seat frame 31, so that both the valve bodies 32A, 32B and the valve seat frame 31 are unit bodies. 1 is fixed to the front surface of the disk portion 1a. In addition, both valve bodies 32A and 32B are positioned by fitting the rib 32b to the concave step portion 14b of the cross rail 14.

  Further, on the front side of the disk portion 1a of the unit main body 1, the left and right sides of the lower part are latched on the left and right inner edges of the separator parts 4A and 4A made of arcuate convex parts with the linear part inside, and the upper protruding edge part 11 Protruding plate-like front plate receivers 16b and 16b are projected from the outer edges of the pins 11b and 11b and the lower left and right flow passage holes 15b and 15d, respectively.

  Further, the unit main body 1 has a boss portion insertion hole 17 that passes through the top and the bottom of the disk portion 1 a, and a notch portion 18 that opens forward near the top end of the projecting edge portion 11. Further, on the rear surface side of the disk portion 1a, there is a rear projecting edge portion 11c extending over the entire circumference, and locking projections 19 are equally formed in the circumferential direction at three locations on the inner peripheral side.

  As shown in FIG. 3, the front plate 2 has a circular shape corresponding to the disk portion 1 a of the unit main body 1, and the upper half of the front plate 2 is a region facing the upper left and right flow path holes 15 a and 15 c of the unit main body 1. A plurality of small-diameter suction holes 20 at the upper center, screw holes 2a corresponding to the boss insertion holes 17 of the unit body 1, and locking holes corresponding to the respective locking pins 11b of the unit body 1 at both side edges. 2b and 2b are formed so as to be transparent in the front-rear direction, and further, notches 2c serving as inlet portions of the respective locking grooves 11a of the unit body 1 are provided at two positions on the periphery.

  Further, as shown in FIG. 7, on the rear surface side of the front plate 2, arc partition ribs 21 and 21 extending in an arc shape from the position of the screw hole 2a to the left and right sides, and linearly downward from the position of the screw hole 2a. The vertical partition rib 22 that extends, the horizontal partition ribs 23 and 23 that connect between the middle portion of the vertical partition rib 22 and the arc partition ribs 21 and 21 on the left and right sides, and the discharge guide rib that branches downward and obliquely downward from each horizontal partition rib 23 24, 24, arc-shaped lead-out guide ribs 25, 25 facing the outside of the lower part of the arc partition ribs 21, 21 on both the left and right sides, and the boss portions 26 around the screw holes 2a. Projected. Further, in the lower part on the rear surface side, arcuate shallow recesses 27 and 27 corresponding to the separator parts 4A and 4A on the unit body 1 side are formed, and further, the first and second discharge valve seats 33a on the unit body 1 side are formed. Linear V-shaped grooves 29, 29 are provided at positions facing the lower edge of 33b.

  Thus, the flow path forming unit 10 is inserted into the locking holes 2b and 2b of the front plate 2 with respect to the disk portion 1a of the unit body 1 on which the first and second valve bodies 32A and 32B and the valve seat frame 31 are mounted. The locking pins 11b, 11b on the unit main body 1 side are inserted and fitted, and the boss portion 26 of the screw hole 2a is inserted into the boss portion insertion hole 17 on the unit main body 1 side, so that the front plate 2 is fitted and locked. By doing so, the aforementioned compartment 10a is configured between the disk portion 1a and the front plate 2.

  In this compartment 10a, as shown in FIG. 8, the projecting edge portion 11 on the unit body 1 side and the ribs 21 to 25 on the front plate 2 side constitute a partition, and the separator portion 4A on the unit body 1 side, 4A and the front plate receiver 16b are also in close contact with the rear side of the front plate 2 to form a wall.

  As a result, left and right first and second suction chambers 51a and 51b separated by the partition ribs 21 to 23 are formed on the upper side in the compartment 10a, and a protruding edge is formed along the upper peripheral edge. A mixing channel 6 </ b> A is formed between the portion 11 and the arc partition ribs 21, 21. The lower side of the compartment 10a is partitioned into left and right first and second discharge chambers 52a and 52b, with the lower side of the vertical partition rib 22 as a virtual boundary.

  The first suction valve 51a is provided in the first suction chamber 51a, the second suction valve 35b is provided in the second suction chamber 51b, the first discharge valve 36a is provided in the first discharge chamber 52a, and the second discharge chamber 52b is provided. The second discharge valve 36b faces each other.

  Further, the lower edge side of the compartment 10a where the projecting edge portion 11 is absent constitutes a discharge port 53 that is open to the outside in a slit shape. Further, in the first and second discharge chambers 52a and 52b, the outlet 54 and the discharge port 53 of the discharge valves 36a and 36b are separated from each other by the separator portion 4A. Both the discharge chambers 52 a and 52 b communicate with each other through a communication port 55 formed below the lower end 22 a of the vertical partition rib 22.

  In the mixing channel 6A, the notch 18 provided in the projecting edge portion 11 of the unit main body 1 opens to the outside as the introduction port 60 at the top portion, and between the lower end of the discharge guide rib 24 and the outlet guide rib 25 on the left and right sides. Faces the side of the first and second discharge chambers 52a, 52b as the outlet 61.

  As shown in FIGS. 1 and 2, the outside-tubing mounting member 71 is made of a metal such as brass or stainless steel, and includes a flange portion 71b at the open front end of an outer cylindrical portion 71a having a substantially cylindrical shape. A pair of outer pipe connecting portions 70a and 70b are brazed to the closed rear end portion of the cylindrical portion 71a, and a cylindrical inner cylindrical portion 71c opened forward is integrally formed coaxially inside the outer cylindrical portion 71a. Has been. The annular space 7a between the outer cylinder portion 71a and the inner cylinder portion 71c communicates with the outer tube connection portion 70a, and the inner space 7b of the inner cylinder portion 71c communicates with the outer tube connection portion 70b. Further, a female screw 74a is formed on the inner periphery of the front portion of the outer tube portion 71a, and an O-ring 82 is fitted on the inner periphery side of the front end of the inner tube portion 71c located inward from the front end of the outer tube portion 71a. Has been.

  Accordingly, the ring-shaped covering packing 81 is fitted to the flange portion 71 b of the outside-tubing attachment member 71. The packing 81 is a molded product having a substantially U-shaped cross section made of synthetic rubber having a substantially U-shaped cross section, and the flange portion 71b is fitted into the annular fitting groove 81b on the inner periphery thereof. Are fixed tightly so as to wrap around the entire outer peripheral surface of the. Note that a plurality of concentric concavity and convexity portions 81c are formed on the front and back surfaces of the thick body portion 81b constituting the front side of the ring-shaped covering packing 81.

  As shown in FIGS. 1 and 2, the in-tank mounting member 72 is made of a hard resin molding such as polyacetate resin, and a flange portion 72b is integrally formed at the front end of the cylindrical portion 72a with both ends open. A male screw 74b corresponding to the female screw 74a of the outside-tubing attachment member 71 is provided on the outer periphery of the shaped portion 72a. An annular stepped portion 75a that steps down from the inner peripheral side to the outer peripheral side and an annular groove 75b on the outer peripheral side are formed on the rear surface side of the flange portion 72b. Further, a plurality of bottomed lock holes 76 are formed at regular intervals in the circumferential direction on the front side of the flange portion 72b, and a plurality of L-shaped locking grooves 77 are arranged at regular intervals in the circumferential direction. Is formed.

  As shown in FIG. 9, the lock hole 76 prevents the rotational displacement of the flow path forming unit 10 by fitting the tip of a lock screw 85 threaded through the female screw hole 2 a of the flow path forming unit 10. A short columnar lock screw extending projection (76a) is provided at the center of the bottom of the bottom.

  On the other hand, the lock screw 85 is an extremely short one having a length of about 8.0 to 8.5 mm made of an elastic synthetic resin molded product. The specific shape is shown in FIG. As shown in the drawing, the lock screw 85 has a male screw portion 85d formed in an approximately ½ length region portion on the head 85e side in the entire length of the shaft portion 85f, while the remaining screw tip 85 has about 1 In the / 2 length region portion, three slit grooves 85a having a Y-shaped cross section in the axial direction are provided in a radial arrangement, whereby the shaft portion 85f is divided into three elastic leg pieces 85b in the circumferential direction. Further, on the outer peripheral surface of the distal end portion of each of the divided leg pieces 85b, a retaining protrusion 85c having a substantially right-angled cross section having a locking step portion in the retaining direction is provided. The retaining protrusion 85c projects slightly outward from the thread inner diameter of the female screw hole 2a of the flow path forming unit 10.

  Therefore, when the tank mounting member 72 is used, the ring-shaped sliding sheet 84 and the ring-shaped packing 83 are externally fitted to the cylindrical portion 72a, and these are held at positions close to the flange portion 72b.

  The ring-shaped packing 83 includes a thick ring portion 83a having a substantially spade shape with a cross section pointed inward, and a thin ring portion 83b extending from the thick ring portion 83a to the center side over the entire circumference. The inner peripheral edge of the thin ring portion 83b is substantially in contact with the cylindrical portion 72a, and is formed of an integrally molded product such as synthetic rubber, and is fitted to the cylindrical portion 72a of the in-tank mounting member 72. 83a faces the annular groove 75b of the flange portion 72b.

  Further, the ring-shaped sliding sheet 84 is made of a hard or semi-rigid flat synthetic resin sheet having a high surface slipperiness such as polyolefin or polyester, and is formed from the ring-shaped packing 83 with respect to the cylindrical portion 72a of the in-tank mounting member 72. Is also fitted on the rear side, that is, on the flange portion 72b side. In this fitted state, the inner peripheral edge substantially contacts the cylindrical portion 72a, and the outer peripheral edge is positioned on the annular groove 75b of the flange portion 72b. The dimension is set so as to cover the maximum thickness portion of the thick ring portion 73 a of the packing 83.

  As shown in FIGS. 1 and 2, the filter member 73 is made of a dish-shaped hard synthetic resin molding, and the circular front wall portion 73a has a large number of suction holes 78 that are small in diameter and penetrate the front and back. It is formed over substantially the entire surface. Further, the peripheral edge portion 73b protruding rearward from the front wall portion 73a is set to have a lower protrusion height corresponding to the slit-like discharge port 53 of the flow path forming unit 10 and has a flow path on the inner periphery. Locking projections (not shown) corresponding to the respective locking grooves 11a of the forming unit 10 are formed.

  In order to attach the hot water supply port adapter having the above-described configuration to the bathtub T, first, the tank outer mounting member 71 and the tank inner mounting member 72 are screwed through the through hole H of the bathtub side wall Ta, and the flange portions 71b of both 71 and 72 are connected. , 72b, and the bathtub side wall Ta is sandwiched from inside and outside through the packings 81 and 83. That is, the tubular portion 72a of the in-tank mounting member 72 is aligned with the outer tubular portion 71a of the outside-tubing mounting member 71 disposed outside the bathtub side wall Ta through the through hole H from the inside of the bathtub side wall Ta, and the in-tank mounting member The male screw 74b of the cylindrical portion 72a may be screwed into the female screw 74a of the outer cylindrical portion 71a and tightened by a rotation operation on the 72 side.

  In the above screwing operation, since the ring-shaped sliding sheet 84 is interposed between the flange portion 71b of the in-tank mounting member 72 and the ring-shaped packing 83, the sliding sheet 84 is from the beginning to the end of the operation. Because of the sliding action, the joint mounting of the in-tank mounting member 72 and the packing 83 is suppressed, so that the packing 83 is not twisted and ruptured and is not in a distorted deformation state, and the in-tank mounting member 72 is lightly and easily rotated. it can.

  At the end of the screwing, as the thick ring portion 83a of the packing 83 enters the annular groove 75b of the flange portion 72b, the ring-shaped sliding sheet 83 is bent at the annular step portion 75a, and the outer peripheral side thereof is the annular groove. The outer diameter is reduced by bending to 75b and finally comes off from the thick ring portion 83a of the packing 83 as shown in FIG. 1, and the thick ring portion 83a is in direct pressure contact with the bottom surface of the annular groove 75b Therefore, a good watertight sealability can be obtained.

  Thus, when the screw connection of both mounting members 71 and 72 is completed, the outer pipe connecting portions 70a and 70b of the outer tank mounting member 71 are connected to the return pipe and the return pipe connected to the water heater, and from the inside of the bathtub T The flow path forming unit 10 and the filter member 73 are attached to the inner attachment member 72. In addition, since the tank outer attachment member 71 is on the non-rotating side, the outer pipe connection portions 70a and 70b may be connected before the screwing operation.

  The flow path forming unit 10 is fitted into the in-tank mounting member 72 from the flow path cylinder part 1c side with the discharge port 53 being on the lower side, and the flow path cylinder part 1c enters the in-tank mounting member 72. It is made to insert in the inner cylinder part 71c of the outer tank attachment member 71 currently performed. In addition, in this insertion part, a clearance gap is sealed with the O-ring 6 fitted to the inner periphery of the inner cylinder part 71c. Then, the rear projecting edge portion 11c of the disk portion 1a is externally fitted to the flange portion 72b of the mounting member 72, and a little twisting is performed in a state in which the respective rear side locking projections 19 are fitted into the locking grooves 77 on the outer periphery of the flange portion 72b. If operated, these locking projections 19 enter the rear end position shifted in the circumferential direction from the inlet side of the locking groove 77, so that the unit 10 cannot be pulled out in the front-rear direction with respect to the in-tank mounting member 72. Become.

  After that, if the lock screw 85 is screwed into the screw hole 2a of the front plate 2, the tip of the lock screw 85 passes through the disk portion 1a and is on the front side of the flange portion 72b of the in-tank mounting member 72 as shown in FIG. The flow path forming unit 10 is inserted into the provided lock hole 76 and cannot be twisted with respect to the in-tank mounting member 72, so that the engagement of the flow path forming unit 10 with the in-tank mounting member 72 is intentional. On the contrary, it can be prevented from being released.

  As shown in FIG. 9A, the lock screw 85 is inserted into the female screw hole 2 of the flow path forming unit 10 in advance and assembled to the unit 10 at the market supply stage before the adapter is installed. It is supposed to be set. That is, when the tip end of the shaft portion 85f is strongly pushed toward the female screw hole 2a, the elastic leg piece 85b is elastically deformed in the direction of narrowing due to the presence of the cut groove 85a and passes through the female screw portion of the female screw hole 2a. Then, after the retaining protrusion 85c at the distal end passes through the female threaded portion, the retaining protrusion 85c is hooked to the distal end of the female threaded portion, that is, the inner end of the female threaded hole 2a by the elastic restoring force of the elastic leg piece 85b. Thus, the lock screw 85 is prevented from coming off. Therefore, there is no need to separately pack the lock screw 85, which is advantageous in terms of component management. Since the lock screw 85 is set in the flow path forming unit 10 in advance at the installation work site, a construction error due to forgetting to attach it. Can be prevented.

  Therefore, when the lock screw 85 is screwed toward the flange portion 72b of the in-bath attachment component 72 from the set state, the tip end portion of the elastic leg piece 85b fits into the lock hole 76 as shown in FIG. Include. In addition, at this time, the lock screw expansion projection 76a is fitted into the space formed by the slit groove 85a existing between the tip portions of the elastic leg pieces. For this reason, the distal end portion of the elastic leg piece 85b is expanded outwardly by the expansion protrusion 76a. As a result, the outer surface of the retaining protrusion 85c on the outer peripheral surface is strongly pressed against the inner peripheral surface of the lock hole 76, and the distal end portion of the lock screw 85 is firmly restrained in the lock hole 76 by mutual pressure contact. A strong relative rotation blocking state of the flow path forming unit 10 with respect to the in-tank mounting member 72 is realized.

  Even when it is necessary to loosen the lock screw 85 for removing the flow path forming unit 10, the male screw portion 85d of the lock screw 85 is detached from the female screw portion of the female screw hole 2a by loosening the lock screw 85. At this stage, the retaining protrusion 85c is dimensioned so as to be positioned outside the female screw hole 2a, so that even if the lock screw 85 is rotated thereafter, the retaining protrusion 85c can be rotated freely. The lock screw 85 is prevented from being removed from the female screw hole 2a.

  Since a large number of locking grooves 77 and lock holes 76 on the in-tank mounting member 72 side are formed at regular intervals in the circumferential direction, the rotation stopping posture of the in-tank mounting member 72 after screwing is changed. In addition, the unit 10 can be connected in the most preferable posture with the discharge port 53 on the lower side by selecting the locking groove 77 and the lock hole 76 to be used.

  The filter member 73 is also put on the front surface of the partition chamber 10a of the flow path forming unit 10, and each locking protrusion (not shown) on the inner periphery of the peripheral edge portion 73b is fitted into the locking groove 11a on the outer periphery of the partition chamber 10a. By slightly twisting in this state, it is engaged and connected to the unit 10 so that it cannot be pulled out in the front-rear direction. In addition, unlike the flow path forming unit 10, the filter member 73 is preferably not easily locked so that it can be easily removed to prevent clogging due to dirt.

  In this case, since the flow path configuration required as the hot water supply adapter is functionally compact as the flow path forming unit 10, there is an advantage that it is easy to assemble to the bathtub side wall Ta and is not bulky in the bathtub T. is there.

  Thus, in the hot water supply adapter attached to the bathroom side wall Ta in a penetrating state, as shown in FIG. 1, the first suction chamber 51a and the first discharge chamber 52a (FIG. 8) located on the left side of the partition chamber 10a of the flow path forming unit 10. The flow path F1 connected to the outside of the flow path cylinder portion 1c via the flow path branching portion 1b is connected to the outer pipe through the annular space 7a between the outer cylinder portion 71a and the inner cylinder portion 71c of the outer tank mounting member 71. It communicates with the portion 70a. The flow path F2 connected from the second suction chamber 51b and the second discharge chamber 52b located on the right side of the compartment 10a to the inside of the flow tube cylinder 1c through the flow branch portion 1b The inner space 7b of the cylindrical portion 1b communicates with the outer pipe connecting portion 70b.

  Although not shown in FIG. 1, the front wall portion 73a of the filter member 73 has a large number of suction holes 78 over substantially the entire surface (see FIG. 2), and the front plate 2 of the flow path forming unit 10 In addition, since a large number of suction holes 20 are provided facing both the suction chambers 51a and 51b (see FIGS. 2, 3 and 7), bath hot water can flow into the suction chambers 51a and 51b from the front side. .

  This hot water supply adapter is a non-polar type, and the same function can be obtained regardless of which of the two flow paths F1 and F2 is on the suction side or the discharge side.

  For example, if the flow path F2 is connected to the forward pipe on the suction side of the water heater in FIG. 1, the second suction valve 35b is deformed inward by the forced suction from the water heater side and is opened at the time of reheating. Bathtub hot water flows into the flow path F2 from the front side of the second suction chamber 51b and is sent to the hot water supply side, but the lower second discharge valve 36b is moved to the second discharge valve seat 33b by forced suction from the hot water supply side. The valve is closed by pressure contact. On the other hand, since warm water is sent from the hot water supply side to the flow path F1 that has become the discharge side, the first discharge valve 36a is deformed to the outside by the feed pressure and is opened to flow into the first discharge chamber 52a. Although the supplied hot water is discharged into the bathtub T from the discharge port 53, the upper first suction valve 35a is brought into pressure contact with the first suction valve seat 34a by the feed pressure and maintains the closed state.

  Therefore, even if the flow path F1 is connected to the suction side and the flow path F2 is opposite to the discharge side, it is the same only by sucking the hot water in the bathtub from the first suction chamber 51a and discharging the supplied hot water from the second discharge chamber 52b. That is. During hot water operation, warm water is supplied from the hot water supply side through both flow paths F1 and F2, and therefore both discharge valves 36a and 36b are opened to discharge both the first and second discharge chambers 52a and 52b. Supply hot water is discharged from the outlet 53. Of course, at this time, both suction valves 35a and 35b are closed.

  In the hot water supply adapter according to the first embodiment, in reheating, for example, when the hot water in the bathtub is sucked from the second suction chamber 51b and the hot water is discharged from the first discharge chamber 52a, as shown in FIG. The substantially downward discharge flow from the chamber 52a is branched into the left and right, that is, the center side and the side side as shown by white arrows by the separator portion 4A, and is discharged into the bathtub.

  At this time, since the flow path is narrowed and the flow velocity is increased in the separator portion 4A, an attractive force is exerted in the vicinity of the discharge flow, and this attractive force acts on the outlet 61 of the mixing flow path 6A. As shown, the hot water in the bathtub continuously flows into the mixing channel 6A from the inlet 60, is continuously led out from the outlet 61, and is caught in the side-side discharge flow.

  In addition, since the same attractive force is exerted on the center side, the hot water in the bathtub that has entered the second discharge chamber 52b that has been stopped continuously continuously from the communication port 55 toward the first discharge chamber 52a as indicated by a black arrow. It is led out and is caught in the discharge flow on the center side.

  Accordingly, the hot water from the hot water heater and the low-temperature bathtub hot water are effectively mixed in the vicinity of the discharge port 53, and the discharge flow is discharged into the bathtub in a lowered temperature, and the discharge flow rate is increased to increase the bathtub flow rate. Therefore, it is possible to reliably prevent a local high temperature portion from being generated in the bathtub or a relatively high temperature flow from reaching the bather's position.

  In this case, since the separator portion 4A has an arcuate shape, the discharge flow is divided into a direct current flowing along the straight portion on one side and a curved flow along the curved surface portion on the opposite side. There is an advantage that the shunt flow collides in the vicinity of 53 and the stirring effect is increased.

  In the above implementation side, a hot water port adapter for a non-polar type bathtub and also having a mixing channel has been exemplified, but the application of the present invention is not limited to such a type of adapter. The present invention can be widely applied to adapters of the type in which the flow path forming unit is attached to the tank inner flange of the tank mounting member.

It is a vertical side view which shows the hot-water port adapter for bathtubs which concerns on 1st embodiment of this invention in the assembly | attachment state. It is a disassembled perspective view of the hot water supply adapter for bathtubs. It is a disassembled perspective view of the flow-path formation unit of the hot-water supply port adapter for the bathtub. The unit main body of the flow path forming unit is shown, in which FIG. (A) is a front view, and (B) is a sectional view taken along line BB in FIG. It is a rear view of the same unit main body. It is a side view of the same unit main body. It is a rear view of the front board of the flow path formation unit. It is a vertical front view of the flow path forming unit. The structure of the attaching part of a lock screw is shown, (A) is a state before tightening of a lock screw, (B) is sectional drawing which respectively shows the state after tightening of a lock screw. The shape of a lock screw is shown, (A) is a side view, (B) is the front view seen from the axial part front end side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Unit body 1a ... Disk part 2a ... Female screw hole 10 ... Flow path formation unit 11c ... Back protrusion edge part 19 ... Locking protrusion 71 ... Outside tank attachment member 72・ ・ ・ In-tank mounting member 73 ・ ・ ・ Filter member 72b ・ ・ Flange part 76 ・ ・ ・ Lock hole 76a ・ ・ Lock screw expansion projection 77 ・ ・ ・ Lock groove 85 ・ ・ ・ Lock screw 85a ・ ・ Slot groove 85b ... Elastic leg piece 85c ... Retaining protrusion 85d ... Male thread 85e ... Head 85f ... Shaft

Claims (3)

A flow path forming unit 10, an outer tank mounting member 71, an inner tank mounting member 72, and a filter member 73;
The flow path forming unit 10 has a plurality of locking projections 19 provided on the inner peripheral surface of the rear end portion of the rear protruding portion 11c of the disk portion 1a, and the outer periphery of the flange portion 72b at the front end of the in-tank mounting member 72. It is connected to the in-tank mounting member 72 so that it cannot be pulled out in the front-rear direction by being fitted into an L-shaped locking groove 77 provided on the winding and winding.
A female screw hole 2a penetrating in the front-rear direction is formed at a position in the vicinity of the peripheral edge of the disk portion 1a of the flow path forming unit 10. The hot water inlet adapter for a bathtub is characterized in that the flow path forming unit 10 is connected to the in-tank mounting member 72 so as not to be wound by being fitted into a lock hole 76 on the front surface side of the flange portion 72b.   The lock screw 85 is made of an elastic synthetic resin, and the distal end portion of the shaft portion 85f is divided into a plurality of elastic leg pieces 85b by an axial slit groove 85a. A retaining protrusion 85c that protrudes outward from the inner diameter of the thread of the female screw hole 2a is provided. Even when the male threaded portion 85d is detached from the female threaded portion of the female threaded hole 2a, the retaining protrusion 85c remains behind the female threaded hole 2a. The hot water inlet adapter for bathtubs according to claim 1, wherein the lock screw 85 is prevented from being pulled out by being engaged with the end face. A lock screw expansion projection 76a is provided at the center of the deep bottom surface of the lock hole 76 on the tank mounting member 72 side, and the projection 76a is fitted into the slit groove 85a at the tip of the lock screw 85, thereby causing the elasticity. The hot-water adapter for a bathtub according to claim 2 , wherein the leg piece 85b is extended outward, and the outer peripheral surface of the retaining projection 85c is pressed against the inner peripheral surface of the lock hole 76.

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