JP4629595B2 - 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 general, this type of hot-water supply adapter is a tubular part with a male thread of a tank mounting member inserted into the through hole of the bathtub side wall from the inside of the bathtub, and a tank mounting member that is connected to the hot water heater outside the bathtub by piping. By screwing the female threaded cylindrical part, the bathtub side wall is sandwiched between the inner and outer sides of the flange part on the proximal end side of the tank mounting member and the flange part on the distal end side of the tank mounting member. It attaches to the said bathtub side wall in the penetration state, The flow-path formation member is fitted to the attachment member in a tank from the bathtub inner side, and also a filter member is mounted | worn with the opening part in a bathtub. And between the flange part of both the attachment members inside and outside the tank and the bathtub side wall, a ring-shaped packing is interposed for watertight sealing (Patent Documents 1 to 5).
JP 2002-336150 A JP 2003-70664 A JP 2003-102633 A JP 2005-58429 A

  However, in these conventional hot water supply port adapters, when the inner mounting member side is rotated for the screwing, the outer mounting member is easy to rotate together due to the strong twisting force at the end thereof. The piping part connected to the hot water supply device from the outside mounting member may be twisted to cause breakage, cracking, deformation, or the like.

  This invention is made in view of the above-mentioned situation, and in a hot water supply adapter for a bathtub, it is attached outside the tank at the time of attaching to the bathtub side wall by a rotation operation of the in-tank attaching member by simple improvement of the constituent members. It is an object of the present invention to provide a member that can prevent breakage, cracking, deformation, etc. due to twisting of a piping part connected to a hot water supply device from an outside tank attachment member with almost no increase in cost by preventing co-rotation of members. To do.

  The above problem is solved by the following means.

[1] A bathtub hot water outlet adapter in which a tubular portion of a tank mounting member is threadedly connected to a mounting member outside a bath that is pipe-connected to a hot water heater outside the bathtub, through a through hole in the side wall of the bathtub. ,
A ring-shaped packing is interposed between the outer surface of the bathtub side wall and the annular end surface of the tank outer mounting member,
On at least one of both side facing surfaces of the ring-shaped packing, there are a plurality of ring-shaped ribs, and convex portions located at a plurality of locations in the circumferential direction of the annular groove between the ring-shaped ribs,
The ring-shaped packing is compressed between the bathtub side wall and the tank outer mounting member by tightening the screwed portion by the rotation operation of the tank inner mounting member, and the convex portion is closely attached to the mating contact surface along with the ring rib. A hot water inlet adapter for a bathtub configured to be.

  [2] The hot water inlet adapter for bathtubs according to [1] above, wherein the ring-shaped rib and the convex portion of the ring-shaped packing are formed on the contact surface on the outside mounting member side.

  [3] The hot-water adapter for a bathtub according to [1] or [2], wherein the height of the convex portion of the ring-shaped packing is set lower than that of the ring-shaped rib.

  [4] The number of ring-shaped ribs of the ring-shaped packing is three or more, and the annular groove between the first and second ring-shaped ribs from the inside does not have the convex portion [1] to [3] The hot water outlet adapter for bathtubs as described in any one of.

  [5] There are three or more ring-shaped ribs on the contact surface on the bathtub side of the ring-shaped packing, and the first ring-shaped rib from the outside is formed higher than the other ring-shaped ribs. The hot water inlet adapter for bathtubs according to any one of [1] to [4], wherein the annular groove between the first and second ring-shaped ribs from the outside does not have the convex portion.

  [6] The bathtub hot-water supply adapter according to any one of [1] to [5] above, wherein the convex portions of the ring-shaped packing are formed of radial ribs equally distributed at three or more locations in the circumferential direction.

  [7] The preceding items [1] to [6] comprising a cover packing having a flange portion projecting outward at the front end of the outer mounting member, and the ring-shaped packing wrapping the outer peripheral side of the flange portion. The hot water outlet adapter for bathtubs as described in any one of.

  According to the invention described in the preceding paragraph [1], when the tubular portion of the in-tank mounting member is threaded and connected to the external mounting member through the through hole in the bathtub side wall, the tightening operation by rotating the in-tank mounting member is performed. In the final stage, the ring-shaped packing interposed between the outer surface of the bathtub side wall and the annular end surface of the tank outer mounting member is compressed, and the convex portion in the annular groove between the ring-shaped ribs of this ring-shaped packing is mated with the ring-shaped rib. By adhering to the side contact surface, a large frictional force is generated with respect to the relative rotation on the contact surface, and the outside mounting member is fixed to the bathtub side by the sliding resistance due to this frictional force, so that it can rotate together. Therefore, breakage, cracks, deformation, and the like due to twisting of the piping portion connected from the outside-tubing attachment member to the water heater are avoided.

  Therefore, in the hot water inlet adapter for bathtubs according to the present invention, other configurations can be obtained simply by using a ring-shaped packing on the outside of the tank provided with convex portions at a plurality of positions in the circumferential direction of the annular groove between the plurality of ring-shaped ribs. All members may have existing configurations, and the ring-shaped ribs of the ring-shaped packing have a general structure for improving the watertight sealability. Therefore, the ring-shaped packing having a convex portion in the annular groove between the ring-shaped ribs is also possible. It can be easily manufactured with only a slight modification of the mold, and the cost burden for preventing the co-rotation is very small.

  According to the invention described in the preceding item [2], the ring-shaped rib and the convex portion of the ring-shaped packing are formed on the contact surface on the tank outer mounting member side, and are generally made of metal and smooth on the end surface of the tank outer mounting member. On the other hand, since the frictional force of the packing works greatly, the co-rotation suppressing action is increased.

  According to the invention described in [3], the height of the convex portion of the ring-shaped packing is lower than that of the ring-shaped rib. The degree of compression is increased, and the sealing action is reliably exhibited.

  According to the invention described in [4], the ring-shaped packing has three or more ring-shaped ribs, and the annular groove between the first and second ring-shaped ribs from the inside does not have the convex portion. The first ring-shaped rib from the inside becomes an independent shape and reliably exhibits a sealing action.

  According to the invention described in [5], the first ring-shaped rib from the outside of the three or more ring-shaped ribs on the bath-side contact surface of the ring-shaped packing is more than the other ring-shaped ribs. In addition, since the shape is high and independent, a high sealing effect can be obtained by the first ring-shaped rib.

  According to the invention described in [6] above, since the convex portion of the ring-shaped packing is composed of radial ribs equally distributed in three or more circumferential directions, the frictional force with respect to relative rotation at the contact surface is more effective. Expresses.

  According to the invention of the preceding item [7], the ring-shaped packing is held on the outer peripheral side of the flange portion at the front end of the outer mounting member as a cover packing. It can be positioned concentrically without contact, so that damage due to contact with the male screw is prevented.

  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. FIG. 1 shows the hot water supply adapter attached to the bathtub side wall, FIG. 2 shows the component configuration of the hot water supply adapter, FIG. 3 shows the ring-shaped packing on the outside of the tank, and FIG. FIG. 5 shows a state before the member is tightened, and FIG. 5 shows a state after the member is tightened.

  The hot water outlet adapter of this embodiment has a hot water function for supplying hot water from a hot water heater (not shown) installed outside the bathtub into the bathtub, and hot water heated by sucking the hot water in the bathtub into the water heater. This is applied to a bathtub hot water supply system with a reheating function for returning the water to the bathtub. As a so-called non-polar type, the same function is achieved even if the connection to the forward pipe and the return pipe (not shown) connected to the water heater is reversed. Can be obtained.

  As shown in FIGS. 1 and 2, this hot water supply adapter includes four main parts, an outer tank mounting member 1, an inner tank mounting member 2, a flow path forming member 3, and a filter member 4, and a ring-shaped packing outside the tank. 5, an O-ring 6, a ring-shaped packing 7 inside the tank, a ring-shaped sliding sheet 8, and an accessory part of the lock screw 9. In addition, H in a figure has shown the through-hole provided in the side wall Ta of the bathtub T. FIG.

  The outside mounting member 1 is made of metal such as brass or stainless steel, and includes a flange portion 1b at the open front end of the substantially cylindrical outer cylinder portion 1a, and a closed rear end portion of the outer cylinder portion 1a. A pair of outer tube connecting portions 11a and 11b are brazed to each other, and a cylindrical inner tube portion 1c that is opened forward is integrally formed coaxially inside the outer tube portion 1a. The inner space 10a of the inner cylinder part 1c communicates with the outer pipe connection part 11a, and the annular space 10b between the outer cylinder part 1a and the inner cylinder part 1c communicates with the outer pipe connection part 11b. Further, a female screw 12 is engraved on the inner periphery of the front portion of the outer tube portion 1a, and the O-ring 6 is disposed on the inner periphery side of the front end of the inner tube portion 1c located inward from the front end of the outer tube portion 1a. An annular groove 13 for fitting is formed.

  The in-tank mounting member 2 is made of a hard resin molding such as polyacetate resin, and a flange portion 2b is integrally formed at the front end of the cylindrical portion 2a with both ends open. A male screw 21 corresponding to the female screw 12 of the member 1 is provided. As shown in FIGS. 4 and 5, the rear surface side of the flange portion 2b has an inner peripheral portion that forms an annular step portion 22, an intermediate portion that forms an annular groove 23, and an outer peripheral portion that forms an annular protruding edge 24. The inner peripheral side wall of the groove 23 is higher than the outer peripheral side wall. Further, as shown in FIG. 2, a plurality of bottomed lock holes 25 are formed at regular intervals in the circumferential direction on the front side of the flange portion 2b, and a plurality of L-shaped engagements are formed on the outer peripheral portion 24. Grooves 26 are formed at regular intervals in the circumferential direction.

  The flow path forming member 3 forms a flow path as the aforementioned non-polar type, and is a rigid synthetic resin in which the flow path branching portion 31b and the flow path cylinder portion 31c are integrally formed on the rear side of the center portion of the disk portion 31a. A main body 31 made of a molded product, a circular lid plate 32 made of a hard synthetic resin molded product fitted to the front surface side of the disk portion 31a of the main body 31, and a vertically long rubber plate arranged in the flow path branching portion 31b And a pair of valve bodies 33, 33. A peripheral wall portion 34 projecting to the front and rear sides is formed at the periphery of the disk portion 31a of the main body 31, and a flow between the lid plate 32 fitted and locked to the front edge side of the peripheral wall portion 34 and the disk portion 31a. A path separation chamber 30 is configured. In addition, the peripheral wall portion 34 has L-shaped locking grooves 34a at three positions on the left and right sides of the outer peripheral surface and at the lower end portion, and locking protrusions at three positions equally distributed on the inner peripheral surface in the circumferential direction. (Not shown) is provided.

  The flow path separation chamber 30 is partitioned into an upper suction space 30a and a lower discharge space 30b. Although not shown, the suction space 30a is separated into two left and right chambers. The upper part facing the flow path branching part 31b is divided into right and left. Thus, the peripheral wall portion 34 of the disk portion 31a has no forward projecting portion in the lower half portion facing the discharge space 30b, so that the discharge space 30b moves to the peripheral side between the lower half portion of the disk portion 31a and the cover plate 32. A discharge port 35 opened in a slit shape is formed. Further, the cover plate 32 has a large number of suction holes 32a, which are small in diameter and penetrate the front and back, on the upper side facing the suction space 30a of the flow path separation chamber 30, and has a screw hole 32b at the center of the upper end. Yes.

  The flow path branching portion 31b communicates with the left and right sides of the suction space 30a and the discharge space 30b in the flow channel cylinder portion 31c and the other side with an outer opening (not shown) via the valve portion 36, respectively. Yes. And in each valve part 36, the valve body 33 arrange | positioned so that both upper and lower sides of the suction space 30a and the discharge space 30b may be inside (back) on the suction space 30a side, and the outer side (front) on the discharge space 30b side, respectively. The valve is opened by elastic deformation, and in the opposite direction, as shown in FIG. 1, the valve seats 36a and 36b at the upper and lower parts are respectively brought into contact with each other in a flat plate shape to be closed.

  The filter member 4 is made of a dish-shaped hard synthetic resin molded product, and a large number of suction holes 40... Are formed over the entire surface of the circular front wall portion 4 a that are small in diameter and penetrate the front and back. Further, the peripheral edge portion 4b protruding rearward from the front wall portion 4a is set such that the protruding height of the lower half corresponding to the slit-like discharge port 35 of the flow path forming member 3 is set low, and the flow path is formed on the inner periphery. Locking projections (not shown) corresponding to the respective locking grooves 34a of the forming member 3 are formed.

  Thus, the flow path forming member 3 is inserted into the tubular portion 2a from the front side with respect to the in-tank mounting member 2 so that the flow path branching portion 31b and the flow path cylindrical portion 31c are inserted into the rear of the peripheral wall portion 34. The projecting portion is externally fitted to the flange portion 2b, and the engagement protrusions on the inner periphery of the peripheral wall portion 34 are slightly twisted in a state of being inserted into the engagement grooves 26 on the outer periphery of the flange portion 2b. Combined. Similarly, the filter member 4 also covers the flow path forming member 3 on the front surface of the flow path separation chamber 30, and the locking protrusions on the inner periphery of the peripheral edge portion 4b are connected to the locking grooves 34a on the outer periphery of the peripheral wall section 34. By being slightly twisted in the state of being inserted into the connector, it is engaged and connected so that it cannot be pulled out.

  The outer ring-shaped packing 5 has a U-shaped cross-section that is substantially inwardly crossed by a thick packing body 5a on the front side and an L-shaped cover 5b extending rearward from the outer peripheral edge thereof. It is a molded product made of synthetic rubber or the like, and by fitting the flange portion 1b of the outer tank mounting member 1 into the annular fitting groove 5c on the inner periphery, the flange portion 1b can be tightly fixed in a state of covering the flange portion 1b as a covering packing. It has become.

  As shown in detail in FIGS. 3 (A) to 3 (C), the ring-shaped packing 5 has five ring-shaped ribs 51a to 51e on the front-side contact surface 50a on the bathtub side. Four ring-shaped ribs 52a to 52d are formed concentrically at substantially equal intervals on the back-side contact surface 50a which is the side of the in-tank mounting member. And the annular grooves 53b and 53c between each of the second to fourth ring-shaped ribs 51b to 51d from the inside of the front side contact surface 50a, and the second to fourth ring-shaped ribs 52b to the inner side of the back side contact surface 50b. In the annular grooves 54b, 54c between 52d, rib-shaped convex portions 55, 56,... Along the radial direction are formed at five locations equally arranged in the circumferential direction at a central angle θ = 72 °.

  These convex portions 55 and 56 are set lower than the ring-shaped ribs 51b to 51d and 52b to 52d on both sides. Accordingly, since the annular grooves 53a and 53d on the front-side contact surface 50a and the annular groove 54a on the back-side contact surface 50b do not have a convex portion, the first ring-shaped ribs 51a, 52a and the fifth (first from the outside) ring-shaped rib 51e of the front-side contact surface 50a are independent of the other ring-shaped ribs. Moreover, the 5th ring-shaped rib 51e of the front side contact surface 50a is higher than the other ring-shaped ribs 51a-51d in the same contact surface 50a.

  On the other hand, the ring-shaped packing 7 inside the tank has a thick ring portion 70 having a substantially spade shape with a cross section pointed inward, and a thin ring portion 71 extending from the thick ring portion 70 to the center side over the entire circumference. And an integrally molded product such as synthetic rubber. And this ring-shaped packing 7 is in the state fitted in the cylindrical part 2a of the in-tank attachment member 2, and while the inner peripheral end of the thin ring part 71 substantially contacts the said cylindrical part 2a, a thick ring part Dimension setting so that 70 faces the annular groove 23 of the flange portion 2b and the maximum thickness portion 70a of the thick ring portion 70 has a thickness larger than the depth of the annular groove 23 in the flange portion 2b of the in-tank mounting member 2 Has been.

  Further, the ring-shaped sliding sheet 8 is made of a hard or semi-rigid flat synthetic resin sheet having a high surface slipperiness such as polyolefin or polyester, and is fitted in the tubular portion 2a of the in-tank mounting member 2, The peripheral edge is substantially in contact with the cylindrical part 2a, and the outer peripheral edge is positioned on the annular groove 23 of the flange part 2b so as to cover the maximum thick part 70a of the thick ring part 70 of the ring-shaped packing 7. Has been.

  In order to attach the hot water supply port adapter having the above-described configuration to the bathtub T, the outside pipe connecting portions 11a and 11b of the outside-tubing attachment member 1 are connected to the outer pipe and the return pipe connected to the water heater on the outside of the bathtub side wall Ta. The ring-shaped packing 5 is fitted to the flange portion 1 b of the outside-tubing attachment member 1. Further, the ring-shaped packing 7 and the ring-shaped sliding sheet 8 are also fitted on the base portion side of the tubular portion 2a of the in-tank mounting member 2 so that the former is positioned on the flange portion 2b side. Then, from the inside of the bathtub side wall Ta, the tubular portion 2a of the in-tank mounting member 2 is passed through the through hole H to be aligned with the outer tubular portion 1a of the out-tank mounting member 1, and the tube is rotated by the operation of the in-tank mounting member 2 The male screw 21 of the shaped part 2a is screwed into the female screw 12 of the outer cylinder part 1a.

  As shown in FIGS. 4 (A) and 4 (B), the packing body 5a of the ring-shaped packing 5 is the top of the ring-shaped ribs 51a to 51e on the front-side contact surface 50a. In addition to being in contact with the bathtub side wall Ta, the back side contact surface 50b is in contact with the end surface of the flange portion 1b of the outside-tubing attachment member 1 at the top of the ring-shaped ribs 52a to 52d. At this stage, the convex portions 55... In the annular grooves 53 b and 53 c on the front side contact surface 50 a and the convex portions 56 in the annular grooves 54 b and 54 c on the back side contact surface 50 b are respectively ring-shaped ribs 51 a to 51 b. Since it is lower than the tops of 51e, 52a to 52d, it is not in contact with the bathtub side wall Ta and the outside tank attachment member 1. On the other hand, inside the tank, the ring-shaped packing 7 and the ring-shaped sliding sheet 8 are sandwiched between and in contact with the flange portion 2b of the in-tank mounting member 2 and the bathtub side wall Ta.

  When the mounting members 1 and 2 are further screwed together, the packing main body portion 5a of the ring-shaped packing 5 is compressed between the bathtub side wall Ta and the flange portion 1b of the outer tank mounting member 1. 5A and 5B, the tops of the ring-shaped ribs 51a to 51e and 52a to 52d are crushed, and the convex portions 55 of the front side contact surface 50a are in close contact with the bathtub side wall Ta. The convex portions 56 of the contact surface 50b are in close contact with the end surface of the flange portion 1b of the outer tank attachment member 1.

  Further, on the inner side of the tank, as the thick ring part 70 of the ring-shaped packing 7 enters the annular groove 23 of the flange part 2b of the in-tank mounting member 2, the ring-shaped sliding sheet 8 becomes an annular step part of the flange part 2b. Since the outer diameter is reduced by bending the outer peripheral side 8a toward the annular groove 23, the thick ring part 70 of the ring-shaped packing 7 is flanged at the final stage of the screwing of the mounting members 1 and 2. It directly presses against the bottom surface of the annular groove 23 of the portion 2b.

  In such a screwing operation of the mounting members 1 and 2, a force to rotate the tank mounting member 1 together with the rotation of the tank mounting member 2 acts on the stationary mounting member 1 on the fixed side. Since the acting force is small at the initial stage where the attachment member 2 can be rotated lightly, the joint rotation of the outside attachment member 1 is reasonably prevented by the fixing strength of the connection portion with the pipe connected to the water heater. And if the action force to the tank outer attachment member 1 becomes large with progress of screwing, co-rotation is blocked | prevented by the frictional force of the ring-shaped packing 5 interposed between the flange part 1b and the bathtub side wall Ta.

  However, since the contact portions of the both-side contact surfaces 50a and 50b of the packing 5 are ring-shaped ribs 51a to 51e and 52a to 52d along the relative rotation direction, the contact portions are not affected by a strong twisting force applied to the final stage of the screwing. It becomes impossible to prevent co-rotation of the outside mounting member 1 due to slippage. However, as described above, in the final stage of the screwing, in addition to the ring-shaped ribs 51a to 51e and 52a to 52d, the convex portions 55... By doing so, a large frictional force is generated with respect to the relative rotation at the contact surface, and the outside-tubing attachment member 1 is fixed to the bathtub T side by this frictional resistance, and does not co-rotate. Therefore, breakage, cracks, deformation, etc. caused by twisting of the piping connected to the hot water heater are avoided.

  Further, in this ring-shaped packing 5, the both-side contact surfaces 50a, 50b are in close contact with the other-side contact surface with concentric multiple annular portions by compression of the ring-shaped ribs 51a-51e, 52a-52d, and the convex portion 55 ... , 56... In each formation region, the tops of the higher ring-shaped ribs 51 b to 51 d and 52 b to 52 d on both sides are crushed and strongly pressed against the other side, and there is no decrease in adhesion due to the presence of the convex portions 55. Furthermore, since both of the facing surfaces 50a and 50b have no convex portions in the first annular groove 53ap54a from the inside, and the first ring-shaped ribs 51a and 52a from the inside are independent and excellent in compressibility, High water-tight sealing performance can be obtained.

  In addition, in the inside of the tank, the ring-shaped sliding sheet 8 interposed between the flange portion 2b of the rotating-side tank mounting member 2 and the ring-shaped packing 7 from the beginning to the end of the screwing operation. The sliding action suppresses the co-rotation of the in-tank mounting member 2 and the ring-shaped packing 7, so that the packing 7 is prevented from being twisted and torn or distorted, and the in-tank mounting member 2. Is also light and easy to rotate. In addition, since the thick ring portion 70 of the packing 7 is finally brought into a state of being in direct contact with and in close contact with both the flange portion 2b and the bathtub side wall Ta, the in-bath mounting member with respect to the through hole H of the bathtub side wall Ta The insertion part of the 2 cylindrical part 2a is reliably watertightly sealed inside the tank.

  Thus, after the bathtub side wall Ta is sandwiched between the flange portions 1b, 2b of the both mounting members 1, 2, the flow path forming member 3 and the filter member 4 are connected to the in-tank mounting member 2 from the inside of the bathtub T as shown in FIG. By attaching as shown above, the installation of the hot water supply adapter is completed.

  The flow path forming member 3 is fitted into the in-tank mounting member 2 from the flow path cylinder part 31c side with the discharge port 35 on the lower side, and the flow path cylinder part 31c enters the in-tank mounting member 2 It is made to insert in the inner cylinder part 1c of the outer tank attachment member 1 currently performed. In addition, the O-ring 6 is fitted in the annular groove 13 on the inner periphery of the inner cylinder portion 1c in advance, and the space between the inserted flow path cylinder portion 31c is sealed. Then, the rear projecting portion of the peripheral wall portion 34 is externally fitted to the flange portion 2b of the in-tank mounting member 2, and is engaged and connected by twisting operation as described above, and then locked to the screw hole 32b of the cover plate 32. Screw in the screw 9.

  As a result, the tip of the lock screw 9 passes through the disk portion 31 a and fits into the lock hole 25 provided on the front side of the flange portion 2 b of the in-tank mounting member 2, so that the flow path forming member 3 is in the in-tank mounting member 2. Therefore, the engagement of the flow path forming member 3 with the in-tank mounting member 2 can be prevented from being released unexpectedly. Since a large number of locking grooves 26 and lock holes 25 on the in-tank mounting member 2 side are formed at regular intervals in the circumferential direction, the rotation stopping posture of the in-tank mounting member 2 after the completion of screwing changes. In addition, the flow path forming member 3 can be connected in the most preferable posture with the discharge port 35 on the lower side by selecting the locking groove 26 and the lock hole 25 to be used.

  Therefore, the flow path connected to the flow path cylinder portion 31c from the left and right sides of the suction space 30a and the discharge space 30b of the flow path separation chamber 30 through the flow path branch portion 31b is the same as that of the inner cylinder portion 1c of the outside-tubing attachment member 1. The flow path that communicates from the inner space 10a to the outer pipe connection portion 11a and that connects from the other left and right sides to the outer opening (not shown) through the flow passage branching portion 31b is connected to the tubular portion 2a of the in-tank mounting member 2 It communicates with the outer tube connecting portion 11b through the annular space 10b between the road tube portion 31c and the inner tube portion 1c.

  The filter member 4 only needs to be connected to the flow path forming member 3 by the twisting operation by covering the front surface of the flow path separation chamber 30 as described above. This is because, unlike the flow path forming member 3, the filter member 4 should be easily removable so as to be easily cleaned in order to prevent clogging due to dirt.

  In the embodiment described above, the ring-shaped packing 5 outside the tank used in the hot water supply adapter for bathtubs according to the present invention has ring-shaped ribs 51a to 51e, 52a to 52d, and convex portions 55 on the both-side contact surfaces 50a and 50b of the packing body 5a. , 56... Are provided on at least one of the both-side contact surfaces 50a, 50b, and a plurality of ring-shaped ribs, and convex portions located at a plurality of circumferential positions in the annular groove between the ring-shaped ribs, What is necessary is just to have.

  However, the outer surface of the bathtub side wall Ta is often rough in terms of material, whereas the outer tank mounting member 1 is generally made of metal, and the end surface of the flange portion 1b is smooth and has low friction. The ring-shaped packing 5 has a plurality of ring-shaped ribs and the convex portions 56 at least on the back-side contact surface 50b in order to exert a large frictional force for preventing co-rotation on the smooth end surface. It is desirable. Moreover, about the front side 50a, in order to ensure sufficient watertightness between the bathtub side wall Ta, it is preferable to provide a plurality of ring-shaped ribs even when the convex portions 55 are not provided.

  As for the convex parts 55 and 56 provided in the annular groove between the ring-shaped ribs in the ring-shaped packing 5 on the outside of the tank, it is preferable to set the top height lower than the tops of the ring-shaped ribs on both sides as in the above embodiment. This is because the compression degree of the ring-shaped rib is higher than that of the convex portions 55 and 56 by the amount of the top portion in the attached state of the hot water inlet adapter for bathtubs, and the sealing action is reliably exhibited.

  Also, the ring-shaped ribs provided on the contact surfaces 50a, 50b of the ring-shaped packing 5 outside the tank are three or more, and between the first and second ring-shaped ribs 51a, 51b from the inside as in the above embodiment, If the projections 55 and 56 are not provided in the annular grooves 53a and 54a between the 52a and 52b, the first ring-shaped ribs 51a and 52a from the inside become independent, so that the sealing action is ensured. Can demonstrate. Further, when three or more ring-shaped ribs are provided on the front-side contact surface 50a, by making the first ring-shaped rib from the outside higher than the other ring-shaped ribs as in the above-described embodiment, Since the degree of compression in the attached state increases, it is possible to further ensure watertight sealing with the bathtub side wall Ta, which is generally rough and rough.

  In addition, the shape of the convex portions 55 and 56 provided on the contact surfaces 50a and 50b of the ring-shaped packing 5 outside the tank is not limited to the radial rib shape exemplified in the above embodiment, but a small circle or square In addition to being able to be set in various ways, it is only necessary to have a plurality of locations in the circumferential direction, and there is no particular limitation on the arrangement interval and the number of arrangement. However, the rib-like shape along the radial direction as in the above-described embodiment is preferable because a large friction with respect to the rotational direction is obtained, and it is particularly recommended that the rib-like shape is provided at three or more locations in the circumferential direction. Moreover, when providing the convex parts 55 and 56 in the both-side contact surfaces 50a and 50b, the formation position may be made to correspond in the front and back, and may be made different.

  Furthermore, the ring-shaped packing 5 on the outside of the tank may be a mere thick ring shape that is entirely disposed between the bathtub side wall Ta and the end face of the flange 1a of the tank outer mounting member 1, but the cover packing as in the embodiment. Then, since it is held on the outer peripheral side of the flange portion 1a of the outer mounting member 1, the male screw can be positioned concentrically without contacting the male screw 21 on the outer periphery of the tubular portion 2a of the inner mounting member 2. There is an advantage that damage due to contact with 21 can be prevented.

  On the other hand, for the watertight sealing part inside the tank, in the above embodiment, the ring-shaped packing 7 and the ring-shaped sliding sheet 8 in which the thin ring part 71 is integrally formed inside the thick ring part 70 having a substantially spade cross section are used. However, the ring-shaped packing 7 can have various cross-sectional shapes including a simple thick ring-shaped one. Further, in the hot water supply adapter according to the present invention, the ring-shaped sliding sheet 8 is not essential. For example, like the annular step portion 22 and the annular groove 22 of the in-bath attachment member 2 in the embodiment, the screws of the attachment members 1 and 2 are screwed. If the facing structure does not cause excessive compression of the ring-shaped packing 7 at the time of joining, the ring-shaped packing 7 can be prevented from being broken or crushed even without the ring-shaped sliding sheet 8.

  As is apparent from the above, in the bathtub spout adapter of the present invention, the ring-shaped packing 5 on the outer side of the tank is only used by providing convex portions at a plurality of locations in the circumferential direction of the annular groove between the plurality of ring-shaped ribs. Thus, all the other constituent members may be existing configurations. Moreover, the ring-shaped packing 5 itself has a general structure for improving the watertight sealability, so that only the convex portions are provided in the annular groove between the ring-shaped ribs. Well, it can be easily manufactured with a slight modification to the existing mold for ring packing. Therefore, the cost burden for preventing the co-rotation according to the present invention is very small.

  In addition, this invention is applicable not only to the non-polar type illustrated as embodiment but to the hot water inlet adapter for bathtubs in which the connection flow path between the return pipe and the return pipe connected to the hot water heater is defined. In addition to the embodiment, various design changes can be made to the detailed configuration such as the valve portion structure, the flow channel configuration, and the shape of the filter member in the flow channel forming member 3.

It is a vertical side view which shows the hot-water port adapter for bathtubs which concerns on one Embodiment of this invention in the assembly | attachment state. It is a disassembled perspective view of the hot water supply adapter for bathtubs. The ring-shaped packing outside the tank used for the hot-water adapter for the bathtub is shown, (A) The figure is a front view of the area divided by 90 degrees in the central angle, (B) The figure is the BB line of (A) figure. A cross-sectional arrow view, (C) is a cross-sectional arrow view taken along line CC in FIG. The state in the initial stage of tightening in the threaded connection between the tank outer mounting member and the tank inner mounting member in the hot-water bath adapter for the bathtub is shown, (A) the figure is a longitudinal side view of the whole, and (B) is the figure in (A). FIG. 4 is an enlarged view inside a virtual line circle B. The state after the tightening in the screw connection is shown, (A) is a longitudinal side view of the whole, and (B) is an enlarged view in an imaginary line circle B in (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tank outer attachment member 1a Outer cylinder part 1b Flange part 12 Female screw 2 Tank inner attachment member 2a Tubular part 2b Flange part 21 Male screw 5 Ring-shaped packing 5a Packing main-body part 5b Cover part 50a Front side contact surface (bath-side contact) surface)
50b Back side contact surface (contact surface on the outside mounting member side)
51a to 51e Ring-shaped ribs 52a to 52d Ring-shaped ribs 53a to 53d Annular grooves 54a to 54c Annular grooves 55, 56 Protrusions 8a Outer peripheral side H Through hole T Bathtub Ta Bathtub side wall

Claims (7)

It is a hot water outlet adapter for a bathtub that is adapted to threadably connect the tubular portion of the in-tank mounting member through the through hole in the side wall of the bathtub, to the outer mounting member to be connected to the hot water heater outside the bathtub,
A ring-shaped packing is interposed between the outer surface of the bathtub side wall and the annular end surface of the tank outer mounting member,
On at least one of both side facing surfaces of the ring-shaped packing, there are a plurality of ring-shaped ribs, and convex portions located at a plurality of locations in the circumferential direction of the annular groove between the ring-shaped ribs,
The ring-shaped packing is compressed between the bathtub side wall and the tank outer mounting member by tightening the screwed portion by the rotation operation of the tank inner mounting member, and the convex portion is closely attached to the mating contact surface along with the ring rib. It is configured to be Ri name,
Wherein the convex portion is brought into close contact with the mating abutment surfaces together with the ring-shaped rib, immobilized by bath hot water supply port adapter that to prevent co-rotation the tank outer mounting member is the bath side.   The hot water inlet adapter for bathtubs according to claim 1, wherein the ring-shaped rib and the convex portion of the ring-shaped packing are formed on a contact surface on the outside mounting member side.   The hot water inlet adapter for bathtubs according to claim 1 or 2, wherein the height of the convex portion of the ring-shaped packing is set lower than that of the ring-shaped rib.   The ring-shaped rib of the ring-shaped packing has three or more strips, and the annular groove between the first and second ring-shaped ribs from the inside does not have the convex portion. Hot water outlet adapter for bathtubs. There are three or more ring-shaped ribs on the bathtub-side contact surface of the ring-shaped packing, and the first ring-shaped rib from the outside is formed higher than the other ring-shaped ribs. The hot water inlet adapter for bathtubs according to any one of claims 1 to 3 , wherein the annular groove between the second and second ring-shaped ribs does not have the convex portion.   The hot water inlet adapter for bathtubs according to any one of claims 1 to 5, wherein the convex part of the ring-shaped packing is composed of radial ribs equally distributed at three or more locations in the circumferential direction.   7. The cover according to claim 1, comprising a flange portion projecting outward at a front end of the outer tank mounting member, wherein the ring-shaped packing includes a cover packing having a structure for wrapping the outer peripheral side of the flange portion. Hot water outlet adapter for bathtubs.

Images