JP2018194293A - Hot water supply port adapter for bathtub - Google Patents

Abstract

To provide a hot water supply port adapter for bathtub enabling a joint pipe to be easily and securely coupled to a bathtub outer fitting member.SOLUTION: A hot water supply port adapter according to the present invention comprises a bathtub outer fitting member 1 and a joint pipe 6. One of coupling parts of the bathtub outer fitting member 1 and joint pipe 6 is a female-side pipe part 14, and the other is a male-side pipe part 64. The male-side pipe part 64 has a guide part 642, having a larger diameter than a tip part 643, formed at a base end side. An opening edge part of the female-side pipe part 64 is a large-diameter hole part 142 having a large diameter, and an inner part is a small-diameter hole part 143. With the male-side pipe part 64 inserted into the female-side pipe part 14 such that the tip part 643 and guide part 642 of the male-side pipe part 64 are arranged at the small-diameter hole part 143 and large-diameter hole part 142 of the female-side pipe part 14, both the pipe parts 14, 64 are coupled together. A seal member 66 mounted on the tip part 643 of the male-side pipe part 64 makes the male-side pipe part 64 and female-side pipe part 14 mutually watertight.SELECTED DRAWING: Figure 7

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 connected to an outdoor water heater or the like by piping.

  In the hot water supply system for bathtubs, the circulation type is equipped with a hot water filling function that sends hot water boiled in a hot water heater installed outside the bathtub into the bathtub, and sucks the hot water in the bathtub and sends it to the hot water heater. It has a reheating function for reheating and returning it to the bathtub as high-temperature water.

  In such a hot water supply system, in order to form a circulation channel between the inside of the bathtub and the hot water heater, the hot water inlet adapter for the bathtub is attached to the side wall of the bathtub in a penetrating state.

  The bathtub hot water supply adapter includes a flow path forming member (partition member) that forms a predetermined flow path, a tank mounting member (male screw member) that attaches the partition member to the inner surface of the side wall of the bathtub, and the bathtub side wall. An external tank attachment member connected to the male screw member is provided, and an external pipe connected to the water heater is connected to the external pipe connection portion of the external tank attachment member (see Patent Document 1).

  By the way, the outside-tubing attachment member in the hot water supply adapter is a rear-drawing type in which the outer pipe connection portion extends in parallel along the axis of the outside-tubing attachment member, so-called straight type, and the axis of the outside-tubing attachment member. It is roughly classified into two types, that is, a side drawer type extending in a direction bent at a substantially right angle, that is, a so-called bent type (L type).

  In other words, in the conventional hot water outlet adapter, depending on the situation of the adapter installation space at the installation site, the rear drawer type tank outer mounting member and the side drawer type tank outer mounting member must be properly used, Somewhat dissatisfied with the versatility.

  Under such circumstances, the development of a technology that allows the rear drawer type tank outer mounting member and the side drawer type tank outer mounting member to be combined with one type of tank outer mounting member has been underway.

  For example, a joint pipe that functions as an outer pipe connecting portion is formed separately from the tank outer mounting member, and the joint pipe is rotatably connected to the tank outer mounting member. Thereby, by rotating the joint pipe with respect to the outside mounting member, the joint pipe (outer pipe connecting portion) extends perpendicularly to the axis of the outside mounting member and is perpendicular to the axis. It is possible to change between two forms, a side-drawing form that bends in a straight line, and any form can be selected according to the situation at the site.

  In order to realize such a joint pipe connecting structure in the outside tank attachment member, it is common to use an uneven fitting method. That is, the joint pipe connecting portion in the tank outer attachment member is configured as, for example, a female side pipe portion, and the connection portion of the joint pipe to the tank outer mounting member is configured as, for example, a male side pipe portion. Is rotatably inserted into the female side tube portion and connected in a retaining state. Further, in this connection structure, an O-ring as a seal member is accommodated in a circumferential groove provided on the outer peripheral surface of the male side pipe portion, and the O-ring causes a gap between the female side pipe portion and the male side pipe portion. Water tightness (seal) of

JP 2011-220877 A

  However, in the connection structure of the joint pipe in the above-described tank outer mounting member, there arises a problem that it is difficult to easily and reliably connect the joint pipe in a watertight state.

  That is, when inserting the male side pipe part of the joint pipe into the female side pipe part of the outside mounting member, after inserting a part of the tip of the male side pipe part into the opening of the female side pipe part, Usually, the male side pipe part is inserted into the female side pipe part while correcting the trajectory so that the axial center of the part coincides with the axial center of the female side pipe part. For this reason, when inserting the male side pipe part into the female side pipe part, a part of the O-ring attached to the outer peripheral surface of the male side pipe part is caught by the inner peripheral surface of the opening edge part of the female side pipe part. It will be out of position and misaligned. By continuing the insertion operation of the male side pipe portion with the O-ring displaced in this way, the position-shifted portion of the O-ring is pushed back relatively to the inner peripheral surface of the female side pipe portion, and the O-ring is The position will be further displaced. If the joint pipe is connected to the outside-tubing attachment member in a state where the O-ring is greatly displaced in this way, there is a possibility that sufficient watertightness cannot be ensured.

  On the other hand, if the male side tube part is inserted after the axial centers of the male side tube part are exactly aligned, it is possible to prevent the O-ring from being displaced. The work of aligning the axial centers of both pipe parts while being separated from the female pipe part is a careful and delicate work, which is heavy on the operator and makes it difficult to connect the joint pipe to the outside mounting member. Another problem arises.

  This invention is made | formed in view of said subject, and it aims at providing the hot water inlet adapter for bathtubs which can connect a joint pipe | tube to a tank outer attachment member simply and reliably.

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

[1] A hot water outlet adapter for a bathtub that is attached to the side wall of the bathtub in a penetrating state and supplies hot water into the bathtub through an outer pipe,
A tank outer attachment member disposed on the outer surface of the side wall of the bathtub, and a joint pipe connected to the outer tank attachment member and connected to the outer pipe;
One of the connection parts of the outside-tubing attachment member and the joint pipe is configured as a female-side pipe part, and the remaining one is configured as a male-side pipe part to be inserted into the female-side pipe part. ,
A seal member housing groove is formed along the circumferential direction on the outer peripheral surface of the distal end portion of the male side tube portion, and a guide portion having a larger diameter than the distal end portion is formed on the proximal end side of the male side tube portion,
The inner part of the tube hole of the female side pipe part is configured as a small diameter hole part having a diameter that can be inserted into the distal end part of the male side pipe part. The opening edge portion of the tube hole is configured as a large-diameter hole portion whose diameter is formed to a size that allows the guide portion to be fitted in an adapted state,
A state in which the male side pipe part is inserted into the female side pipe part in a mode in which the tip part and the guide part of the male side pipe part are respectively arranged in the small diameter hole part and the large diameter hole part of the female side pipe part And the male side pipe part and the female side pipe part are connected in a retaining state,
A hot water inlet adapter for a bathtub characterized in that the male side pipe part and the female side pipe part are watertight by a seal member accommodated in a seal member accommodation groove of the male side pipe part. .

[2] The length from the distal end surface of the guide portion at the distal end portion of the male side tube portion to the intermediate position in the axial direction of the seal member housing groove is “L1”, and the axial center of the large diameter hole portion of the female side tube portion When the direction length is “L2”,
The hot-water adapter for bathtubs according to the preceding item 1, wherein the relationship of “L1 ≦ L2” is established.

[3] The connecting portion of the joint pipe is rotatably connected to the connecting portion of the outer tank attachment member,
The preceding item 1 in which the outer tube connected to the joint tube is rotatable between a configuration in which the outer tube is disposed in parallel to the axis of the tank outer attachment member and a configuration in which the outer tube is disposed in a direction orthogonal to the tank The hot water inlet adapter for bathtubs as described in 2.

[4] A flange portion that contacts the distal end surface of the female ring portion is formed on the male pipe portion,
A pin fixing groove is formed along the circumferential direction between the sealing member housing groove and the flange portion on the outer peripheral surface of the male side pipe portion,
A pin insertion hole is formed in the female side tube portion corresponding to the pin accommodation groove,
A fixing pin that is removably inserted from the outside into the pin insertion hole of the male side pipe portion is accommodated in the pin accommodation groove, and the fixation pin is located within the inner peripheral surface of the pin accommodation groove and the pin insertion hole. The hot-water supply port adapter for bathtubs according to any one of the preceding items 1 to 3, wherein the male side pipe part and the female side pipe part are connected in a retaining state by engaging with a peripheral surface.

  According to the hot water inlet adapter for bathtubs of the above [1], when the male side pipe part is inserted into the female side pipe part, the ring-shaped seal member attached to the male side pipe part is displaced and a watertight defect occurs. Can be reliably prevented. That is, since the large-diameter hole at the opening edge of the female side pipe part has a large diameter, when the male side pipe part is inserted into the female side pipe part, a ring-shaped seal that is attached to the tip of the male side pipe part The member is smoothly inserted into the large-diameter hole without contacting the inner peripheral surface of the large-diameter hole. Further, when the male side pipe part is inserted and the guide part is fitted into the large-diameter hole part, the male side pipe part is positioned with respect to the female side pipe part by the fitting, and in this state, the distal end part of the male side pipe part Is inserted into the small-diameter hole. Therefore, the seal member of the male side pipe part does not make strong partial contact with the inner peripheral surface of the small diameter hole part, and the positional displacement of the seal member can be prevented, and the male side pipe part is securely inserted into the female side pipe part. can do.

  According to the hot water inlet adapter for bathtubs of the above [2], when the male side pipe part is inserted into the female side pipe part, the guide part has already been inserted when the seal member of the male side pipe part is inserted into the small diameter hole part. Is inserted into the large-diameter hole portion and the both pipe portions are positioned, so that it is possible to more reliably prevent the seal member from being displaced due to contact with the inner peripheral surface of the small-diameter hole portion.

  According to the hot water inlet adapter for bathtubs of the above [3], by rotating the joint pipe, the outer pipe connected to the joint pipe is directed in a direction orthogonal to the axis of the adapter, or the outer pipe is set to the axis of the adapter. Or in a direction parallel to. Therefore, according to the installation space of the hot water supply adapter, the direction in which the outer pipe is pulled out can be freely set, and versatility can be improved.

  According to the hot water inlet adapter for bathtubs of the above [4], after inserting the male side pipe part into the female side pipe part, simply inserting the fixing pin into the female side pipe part, it is prevented from coming off in both pipe parts. Can be reliably connected to each other, and the assembly work of the attachment member outside the tank of the joint pipe can be performed more easily.

FIG. 1 is a perspective view showing a hot water inlet adapter for bathtubs according to an embodiment of the present invention. Drawing 2 is a sectional view showing the hot-water supply adapter of an embodiment. FIG. 3 is an exploded perspective view showing the hot water supply adapter according to the embodiment. Drawing 4 is a perspective view which looked at the state where the joint pipe was rotated in the straight form in the hot-water supply adapter of an embodiment from the back side. FIG. 5 is a perspective view showing a state where the joint pipe is separated from the outside-tubing attachment member in the hot water supply adapter according to the embodiment. FIG. 6 is an enlarged cross-sectional view showing the periphery of the joint portion of the joint pipe in the outer tank attachment member of the embodiment. FIG. 7 is an enlarged cross-sectional view showing the periphery of the joint portion of the joint pipe in the outer tank attachment member of the embodiment.

  1-4 is a figure which shows the hot water inlet adapter for bathtubs which is embodiment of this invention. As shown in these drawings, the hot water inlet adapter for bathtubs of the present embodiment is assembled in a mounting hole provided in the side wall W of the bathtub and supplies hot water from a water heater installed outside the bathtub into the bathtub. This is a so-called nonpolar type that has a hot water filling (hot water storage) function and a reheating function that draws hot water in the bathtub into the water heater and returns the heated hot water to the bathtub. The same function can be obtained even if the connection to the return pipe and the return pipe connected to the water heater is reversed.

  The hot water supply adapter of the present embodiment includes a partition member 3 that forms a predetermined flow path between the inside and the outside of the bathtub, a male screw member 2 that attaches the partition member 3 to the inner surface side of the side wall W of the bathtub, As an essential component, an outside tank attachment member 1 that is arranged on the outer surface side of the side wall W and fixes the male screw member 2 to the bathtub, a filter member 4, and a joint pipe 6 connected to the outside tank attachment member 1. I have.

  In addition, in this specification, the inner side (left side of FIG. 2) with respect to the bathtub along the axial center direction of the hot water inlet adapter for bathtubs is referred to as “front side” or “front side”, and the outer side of FIG. (Right side) is “rear side” or “back side”, the upper side of FIG. 2 is “upper side”, the lower side of FIG. 2 is “lower side”, and the direction perpendicular to the page of FIG. It is described as “direction” or “left-right direction”.

  The tank outer attachment member 1 is made of, for example, brass, stainless steel, or a synthetic resin, and in the present embodiment, is made of a molded product of a hard synthetic resin. The tank outer mounting member 1 includes a cylindrical outer cylinder portion 12 whose front side is open and whose rear side is closed, and a cylindrical inner cylinder portion 11 disposed coaxially within the outer cylinder portion 12. A flat ring-shaped flange portion 13 provided on the outer periphery of the front end of the outer cylinder portion 12, and two upper and lower female pipe portions 14 provided on the outer surface of the rear wall of the outer cylinder portion 12, which are integrally formed. ing.

  The internal space of the inner cylinder part 11 is configured as a part of an inner flow path A described later, and the annular space between the inner cylinder part 11 and the outer cylinder part 12 is configured as a part of an outer flow path B described later. Has been.

  A ring-shaped packing 51 made of synthetic resin is attached to the outer peripheral edge portion of the flange portion 13 of the outside-tubing attachment member 1 for watertightness between the flange portion 13 and the outer wall surface of the bathtub.

  As shown in FIGS. 5-7, the female side pipe part 14 provided in the rear wall outer surface of the outer cylinder part 12 has a circular tubular shape provided with mutually independent pipe lines. Each axial center of the female side pipe part 14 is arrange | positioned along the up-down direction so that it may orthogonally cross with respect to the axial center of the tank outer attachment member 1. FIG.

  In the present embodiment, of the female side pipe part 14, the lower female side pipe part 14a extending downward is opened downward, and the upper female side pipe part 14b extending upward is opened upward. Yes. The tip opening of the lower female side pipe portion 14a is connected to the inner space of the inner cylinder portion 11, that is, the inner flow path A described later, and the tip opening of the upper female side portion 14b is connected to the inner cylinder portion 11 and the outer cylinder. The annular space between the portions 12, that is, the outer flow path B described later is connected in communication.

  The opening edge part in the tube hole of the female side pipe part 14 has a larger inner diameter than the inner part. In the present embodiment, in the tube hole of the female-side tube portion 14, the large-diameter hole portion 142 is configured by the opening edge portion having a large inner diameter size, and the small-diameter hole portion 143 is configured by the back portion having the small inner diameter size. Yes.

  Long-hole-shaped pin insertion holes 144 that are long in the circumferential direction are formed at four positions around the large-diameter hole 142 of the female-side tube 14 from the small-diameter hole 143. Each pin insertion hole 144 penetrates the female side tube portion 14, and the inside and outside of the female side tube portion 14 communicate with each other through each pin insertion hole 144.

  In this embodiment, the female side pipe part 14 is comprised as a connection part of the tank outer attachment member 1. FIG. Further, the pin insertion hole 144 is configured as a pin insertion portion.

  As shown in FIG. 5, the joint pipe 6 connected to the female side pipe portion 14 of the outside-tubing attachment member 1 is constituted by an integrally molded product of hard synthetic resin. The joint pipe 6 has a substantially L-shape in which the ends of the short pipe part and the long pipe part are connected to each other. The distal end side of the long tube portion side of the joint tube 6 is configured as an outer tube connecting portion 61, and is press-fitted and fixed to the end portions of the outer tubes such as the forward tube 6a and the return tube 6b as shown in FIGS. Thus, the outgoing pipe 6a and the return pipe 6b can be connected in communication. The outer pipe connecting portion 61 has a so-called bamboo shoot shape. That is, on the outer peripheral surface of the outer pipe connecting portion 61, a plurality of retaining protrusions 62 continuous in the circumferential direction are integrally formed at equal intervals in the axial direction, and the forward pipe 6a and the return pipe to be connected are formed. 6b can be more reliably prevented from coming off. Needless to say, the shape of the outer tube connecting portion 61 is not limited to the bamboo shoot shape, and may be any shape as long as the outer tubes 6a and 6b can be connected. For example, a male screw-like portion may be formed on the outer peripheral surface of the outer pipe connecting portion 61 so that the outer pipes 6a and 6b can be connected to each other in a screwed shape.

  As shown in FIGS. 5 to 7, the distal end side of the joint pipe 6 on the side of the short pipe portion is configured as a male side pipe portion 64 so that it can be inserted into the female side pipe portion 14 in the outside-tubing attachment member 1. It has become.

  The axial center of the male side pipe part 64 is arranged at right angles to the axial center of the outer pipe connection part 61. Needless to say, the pipe line inside the male side pipe part 64 and the pipe line inside the outer pipe connection part 61 are connected in communication.

  On the outer periphery in the vicinity of the male side pipe part 64 on the short pipe part side of the joint pipe 6, a flange part 63 protruding outward is integrally formed. The outer diameter dimension of the flange portion 63 is formed so as to substantially correspond to the outer diameter dimension of the distal end surface of the female side pipe portion 14 of the outer tank attachment member 1.

  The distal end portion 643 of the male side pipe portion 64 is formed such that its outer diameter dimension corresponds to the inner diameter size of the small diameter hole portion 143 of the female side pipe portion 14 so that it can be accommodated in the small diameter hole portion 143. It has become.

  A guide portion 642 having an outer diameter dimension larger than that of the distal end portion 643 and smaller than that of the flange portion 63 is formed at the proximal end portion of the male side pipe portion 64. The outer diameter dimension of the guide portion 642 is formed to correspond to the inner diameter dimension of the large-diameter hole portion 142 of the female-side tube portion 14, and the guide portion 642 is substantially adapted to the large-diameter hole portion 142. It can be fitted in the state.

  Note that the axial dimension of the guide portion 642 is shorter than the axial dimension L2 of the large-diameter hole 142 in the female-side tube portion 14.

  An O-ring housing groove 65 that is continuous in the circumferential direction is formed in the vicinity of the outer peripheral surface of the distal end portion 643 of the male side pipe portion 64. A synthetic rubber O-ring 66 having elasticity and adhesion is mounted in the O-ring housing groove 65. In the present embodiment, the O-ring housing groove 65 constitutes a seal member housing groove, and the O-ring 66 constitutes a ring-shaped seal member.

  A pin housing groove 644 is formed continuously in the circumferential direction so as to be adjacent to the guide portion 642 at the proximal end of the outer peripheral surface of the distal end portion 643 of the male side pipe portion 64. The pin accommodating groove 644 of the male side pipe part 64 is disposed at a position corresponding to the pin insertion hole 144 of the female side pipe part 14.

  In the present embodiment, the male side pipe part 64 is configured as a connection part of the joint pipe 6. Further, a pin housing groove 644 is configured as a pin housing portion.

  The male side pipe part 64 of the joint pipe 6 having the above configuration is inserted into and connected to the female side pipe part 14 of the in-tank mounting member 1. That is, the male side pipe part 64 is inserted into the pipe hole of the female side pipe part 14, and the distal end part 643 and the guide part 642 of the male side pipe part 64 are the small diameter hole part 143 and the large diameter hole of the female side pipe part 14. The parts 142 are arranged so as to be substantially adapted to each other. In this inserted state, the outer peripheral surface of the male side pipe part 64 is in sliding contact with the inner peripheral surface of the female side pipe part 14, and the male side pipe part 64 can rotate about the axis with respect to the female side pipe part 14. It has become. Furthermore, the male side pipe part 64 can be fixed at an arbitrary rotational position by friction between the two pipe parts 14 and 64.

  When the male side pipe part 64 is inserted into the female side pipe part 14, the flange part 63 comes into contact with the distal end surface of the female side pipe part 14, thereby positioning in the insertion direction.

  When the male side pipe part 64 is inserted into the female side pipe part 14, the O-ring 66 accommodated in the O-ring accommodation groove 65 of the male side pipe part 64 is formed on the inner peripheral surface of the female side pipe part 14. It is elastically compressed and is in contact, thereby ensuring watertightness (sealability) between the outer peripheral surface of the male side pipe part 64 and the inner peripheral surface of the female side pipe part 14.

  Here, in the present embodiment, when the operator inserts the joint pipe 6 (male side pipe part 64) into the female side pipe part 14, the O accommodated in the O-ring accommodation groove 65 of the male side pipe part 64 is stored. In the vicinity of the ring 66 being inserted into the small diameter hole 143 of the female side pipe part 14, the guide part 642 of the male side pipe part 64 is inserted into the large diameter hole part 142 of the female side pipe part 14. The dimension of each part of the pipe part 64 and the female side pipe part 14 is adjusted.

  Thereby, in this embodiment, when inserting the male side pipe part 64 in the female side pipe part 14, it is surely prevented that the O-ring 66 is displaced and problems such as poor watertightness occur. Can do. That is, when the male side pipe part 64 is inserted into the female side pipe part 14, first, the tip part 643 of the male side pipe part 64 is inserted into the large-diameter hole part 142 of the female side pipe part 14. The large-diameter hole part 142 has a larger diameter than the tip part 643. For this reason, the O-ring 66 attached to the distal end portion 643 of the male side pipe portion 64 has the large-diameter hole portion 142 even if the male side pipe portion 64 is slightly misaligned with respect to the female side pipe portion 14. The O-ring 66 does not come into strong contact with the inner peripheral surface of the O-ring, and the O-ring 66 does not come out of the O-ring housing groove 65 and is not displaced.

  When the insertion operation is further continued, the position of the O-ring 66 of the male side pipe portion 64 is inserted into the small-diameter hole portion 143 of the female side pipe portion 14. The guide part 642 of the male side pipe part 64 is fitted into the large diameter hole part 142 of the female side pipe part 14 when being inserted into the small diameter hole part 143. Since the outer diameter dimension of the guide part 642 is formed corresponding to the inner diameter dimension of the large-diameter hole part 142, the guide part 642 fits into the large-diameter hole part 142 in an adapted state. Then, the guide portion 642 is guided to the inner peripheral surface of the large-diameter hole portion 142, so that the position of the male side tube portion 64 is adjusted so that the axial center thereof coincides with the axial center of the female side tube portion 14. .

  Thus aligned, the portion of the O-ring 66 of the male side pipe part 64 is inserted into the small diameter hole part 143 of the female side pipe part 14. For this reason, a part of the O-ring 66 does not come into strong contact with the inner peripheral surface of the small-diameter hole 143, and the entire circumference of the O-ring 66 is in proper contact with the entire inner peripheral surface of the small-diameter hole 143. The distal end portion 643 of the male side pipe portion 64 is inserted. Therefore, it is possible to reliably insert the male side pipe part 64 to the female side pipe part 14 to a predetermined position while reliably preventing a problem that the O ring 66 is displaced from the O ring housing groove 65 and is displaced. .

  Further, in this embodiment, as shown in FIG. 7, the axial length from the distal end surface of the guide portion 642 in the distal end portion 643 of the male side pipe portion 64 to the intermediate position in the axial center direction of the O-ring housing groove 55 is set. It is preferable that the relational expression “L1 ≦ L2” is satisfied when “L1” is set and the axial length of the large-diameter hole 142 of the female-side tube portion 14 is “L2”.

  That is, when this relational expression is established, the O-ring 66 of the male side pipe part 64 is inserted into the small diameter hole part 63 of the female side pipe part 64 when the male side pipe part 64 is inserted into the female side pipe part 14. At this point, the guide part 642 of the male side pipe part 64 is already fitted in the large diameter hole part 142 of the female side pipe part 14. Therefore, with this fitting, the distal end portion 643 of the male side pipe portion 64 is connected to the small diameter hole portion 143 of the female side pipe portion 14 in a state where the alignment of the male side pipe portion 64 with the female side pipe portion 14 is ensured. Can be inserted into the back of the. Accordingly, it is possible to more reliably prevent the O-ring 66 from being displaced and causing watertight defects.

  On the other hand, in this embodiment, after inserting the male side pipe part 64 of the joint pipe 6 in the female side pipe part 14, the fixing pin member 7 is used in order to prevent removal.

  As shown in FIGS. 5 and 6, the fixed pin member 7 is formed in a substantially U shape and includes a pair of fixed pins 71 and 71 that can be elastically deformed in the expanding direction. The intermediate portions of the fixing pins 71 and 71 are provided with holding portions 72 and 72 that are curved outwardly corresponding to the pin receiving grooves 644 in the joint pipe 6.

  The pair of fixing pins 71, 71 of the fixing pin member 7 are inserted into the pin insertion holes 144, 144 adjacent to each other in the front and rear direction on one side surface (right side surface) of the female side tube portion 14 with the male side tube portion 64 inserted. Inserted. As a result, the pair of fixing pins 71, 71 pass through the pin receiving grooves 644, 644 on both the front and rear sides of the male side pipe part 64, and the tips of the pair of fixing pins 71, 71 are connected to the female side pipe part 14. On the side surface (left side surface), the pins are inserted into the pin insertion holes 144 and 144 adjacent to each other in the front-rear direction. In this pin insertion state, the pair of fixing pins 71 and 71 are elastically deformed slightly outward, and the pair of fixing pins 71 and 71 causes the male side pipe portion 64 to be formed in the pin receiving groove 644 by the elastic force. Holding from both sides. Further, the pair of fixing pins 71, 71 are engaged with the inner peripheral surface of the pin insertion hole 144 in the female side tube portion 14 and the inner peripheral surface of the pin housing groove 644 in the male side tube portion 64, thereby causing the male side tube. While the portion 64 allows the rotation of the female side tube portion 14 in the direction around the axis, the movement in the axial direction is restricted to prevent the female side tube portion 14 from coming off.

  Here, in the present embodiment, the joint pipe 6 can be connected to the female side pipe portion 14 of the outside-tubing attachment member 1 in a state of being prevented from coming off simply by inserting the fixing pin 71, so that troublesome work such as screwing is required. Compared with the case where it connects, the connection operation of the joint pipe | tube 6 can be performed easily.

  Needless to say, when the joint pipe 6 is removed from the outside-tubing attachment member 1, it is only necessary to pull out the fixing pin member 7 from the female side pipe portion 14.

  As shown in FIGS. 2 and 3, the male screw member 2 is made of, for example, an integrally molded product of hard synthetic resin, and a flat ring-shaped flange portion 22 is integrally formed on the outer periphery of the front end of a cylindrical portion 21 with both ends open. On the outer peripheral surface of the cylindrical portion 21, a male screw that is screwed into the female screw of the outside-tubing attachment member 1 is engraved.

  On the front surface side of the flange portion 22, a large number of bottomed lock holes 23 fitted to the tips of lock pins 35 provided in the partition member 3 are provided at regular intervals in the circumferential direction.

  The cylindrical portion 21 of the male screw member 2 is screwed and fixed to the outer cylindrical portion 12 of the outside-tubing mounting member 1 through the mounting hole.

  Thereby, the male screw member 2 is arranged via the ring-shaped packing 53 in a state where the flange portion 13 of the outer tank mounting member 1 is arranged along the peripheral edge portion of the mounting hole H on the outer surface (outer wall surface) of the side wall W of the bathtub. And press contacted with the peripheral edge of the mounting hole on the inner wall surface of the bathtub.

  In this way, the peripheral edge portion of the attachment hole of the bathtub side wall W is sandwiched by the flange portions 13 and 22 of the outside-tubing attachment member 1 and the male screw member 2 and assembled in a penetrating manner to the side wall W of the bathtub.

  The partition member 3 forms a flow path as a non-polar type, and is constituted by, for example, a molded product of hard synthetic resin. The partition member 3 includes an elongated cylindrical cylindrical portion 31 extending in the axial direction (front-rear direction) and a disk-shaped disc portion 32 provided at the front end portion of the cylindrical portion 31.

  The disk portion 32 has a hollow structure in which a plurality of flow paths are provided. The outer peripheral wall integrally formed so as to surround the outer periphery and a part of the front side opening of the outer peripheral wall are closed. And a plate 33.

  A plurality of, for example, two openings 321 are formed on both lower sides of the outer peripheral wall of the disk portion 32.

  In the cylindrical portion 31, an inner flow path A is formed by the inside of the cylindrical portion 31 and the inside of the inner cylindrical portion 11 of the tank outer attachment member 1 communicating with the cylindrical portion 31.

  Furthermore, the cylindrical part 31 is arrange | positioned inside the cylindrical part 21 of the external thread member 2 so that it may mention later, the annular space between the cylindrical part 31 and the cylindrical part 21, and the tank outer attachment member 1 connected to it. The outer flow path B is formed by the annular space between the inner cylinder part 11 and the outer cylinder part 12.

  In the present embodiment, one of the openings 321 provided in the disk portion 32 functions as a discharge port, and the remaining one functions as a suction port. When a double-conveying water heater is employed, the two openings 321 function as discharge ports during hot water filling.

  The partition member 3 having the above configuration is detachably attached to the male screw member 2 assembled to the bathtub side wall W by a known attachment means. At this time, the cylindrical part 31 in the partition member 3 is inserted into the inner cylinder part 11 of the outside-tubing attachment member 1 disposed inside the male screw member 2.

  In this state, an O-ring 36 is disposed between the inner cylindrical portion 11 of the outside-tubing attachment member 1 and the cylindrical portion 31 of the partition member 3, and the O-ring 36 allows watertightness between the inner cylindrical portion 11 and the cylindrical portion 31. Is planned.

  Further, the packing (not shown) provided on the rear surface of the disk portion 32 of the partition member 3 allows watertightness between the disk portion 32 of the partition member 3 and the flange portion 22 of the male screw member 2. .

  A pin insertion hole 34 into which the lock pin 35 is inserted is formed at the center upper portion of the front plate 33 in the partition member 3, and when the lock pin 35 is press-fitted into the pin insertion hole 34 of the partition member 3, The distal end portion of the lock pin 35 is fitted into one of the lock holes 23 in the male screw member 2, thereby preventing rotational displacement of the partition member 3 with respect to the male screw member 2.

  The filter member 4 is made of, for example, a dish-shaped molded product made of hard synthetic resin. The lower end portion is provided with an opening 42 corresponding to the opening 321 of the disk portion 32, and the front wall portion has a large number of suctions. A hole 41 is formed and is detachably attached to the front side of the partition member 3.

  In the hot water supply adapter having the above configuration, the forward pipe 6a to which hot water is supplied from the hot water heater to the two joint pipes 6 and 6 connected to the outside mounting member 1, and the return pipe for returning hot water to the hot water heater side. 6b is connected, but the hot water supply adapter according to the present embodiment is of a non-polar type, and therefore any pipe of the two joint pipes 6 and 6 is connected to either the forward pipe 6a or the return pipe 6b. You may connect. For example, as shown in FIG. 1, the forward pipe 6a is connected to one joint pipe 6 communicating with the internal flow path A of the hot water supply adapter, and the return pipe 6b is connected to the other joint pipe 6 communicating with the external flow path B. In this case, the hot water supplied from the forward pipe 6 a passes through the internal flow path A and is supplied into the bathtub from one opening 321 of the partition member 3, and the hot water in the bathtub is supplied to the other of the partition member 3. It is sucked into the inside of the partition member 3 from the opening portion 321 of the other, and returns to the water heater through the external flow path B and the return pipe 6b.

  Conversely, when the forward pipe 6a is connected to the other joint pipe 6 and the return pipe 6b is connected to one joint pipe 6, hot water from the water heater passes through the forward pipe 6a and the external flow path B. The hot water in the bathtub is returned to the water heater through the internal flow path A and the return pipe 6b.

  In the present embodiment, at least a part of the outer pipes such as the forward pipe 6a and the return pipe 6b is formed of a synthetic resin molded product having flexibility.

  As described above, according to the hot water inlet adapter for bathtubs of the present embodiment, the large-diameter hole portion 142 is formed on the inlet side of the tube hole in the female-side tube portion 14 of the outside-tubing attachment member 1, and the joint tube 6 is male. Since the large-diameter guide portion 642 is formed at the base end portion of the side tube portion 64, as described above, when the male side tube portion 64 is inserted into the female side tube portion 14, It is possible to prevent the O-ring 66 attached to the distal end portion 643 from being displaced, and to ensure good water tightness. Further, the male side pipe part 64 is simply and reliably inserted into the female side pipe part 14 without being particularly conscious of the positional relationship of the male side pipe part 64 with respect to the female side pipe part 14. can do.

  Further, after the male side pipe part 64 is inserted into the female side pipe part 14, the male side pipe part 64 is securely attached to the female side pipe part 14 by simply inserting the fixing pin member 7 into the female side pipe part 14. Can be connected to each other, and a troublesome screwing operation or the like can be omitted, and the assembly work of the outside-tank mounting member 1 of the joint pipe 6 can be further easily performed.

  The joint pipe 6 assembled to the outside-tubing attachment member 1 is configured to be able to rotate 360 ° around the axis of the male side pipe portion 64, that is, around the axis perpendicular to the axis of the outside-tubing attachment member 1. Therefore, by the rotation operation, for example, as shown in FIG. 1, the outer pipe connecting portion 61 of the joint pipe 6 is directed in a direction orthogonal to the axis of the outside-tubing mounting member 1, or as shown in FIG. 6 outer pipe connecting portions 61 can be directed in a direction parallel to the axis of the outside-tubing attachment member 1. Therefore, the outer pipes 6a and 6b can be drawn out in a direction perpendicular to the axis of the tank outer mounting member 1 or in a parallel direction. Depending on the installation space of the hot water supply adapter, the outer pipes 6a and 6b The drawing direction of 6b can be freely set to an optimum direction, and versatility can be improved.

  In the present embodiment, when resin pipes are used as the outer pipes 6a and 6b connected to the pair of joint pipes 6 and 6, the tip positions of the outer pipe connection portions 61 and 61 in the pair of joint pipes 6 and 6 are used. Are preferably matched. Specifically, in a state where the joint pipes 6 and 6 are arranged, for example, in parallel with the axis of the outside-tubing attachment member 1 (see FIG. 4), the positions of the tips of the outer pipe connecting portions 61 and 61 in the axial direction It is preferable to match each other. That is, if the distal end positions of the outer pipe connecting portions 61, 61 are not uniform, either one of the outer pipes such as the forward pipe 6a and the return pipe 6b is fitted to the distal end position of the outer pipe connecting parts 61, 61. The end must be cut. However, since the processing of the end portion such as cutting is troublesome for the resin pipe, it is difficult to cut in accordance with the tip positions of the outer pipe connecting portions 61 and 61, and the pipe connecting work may be difficult. . Therefore, as described above, it is preferable to match the tip positions of the outer pipe connecting portions 61 and 61.

  In the above-described embodiment, the case where the female side pipe portion 14 is formed on the outer tank attachment member 1 side and the male side pipe portion 64 is formed on the joint pipe 6 side has been described as an example. Is not limited thereto, and the male side pipe part is formed on the joint pipe side while the male side pipe part is formed on the joint pipe side. You may comprise so that it may insert in a pipe part. Even in this case, similar effects can be obtained as in the above embodiment.

  Moreover, in the said embodiment, although the pin accommodation groove 644 of the male side pipe part 64 which accommodates the fixing pin 71 is formed between the O-ring accommodation groove 65 and the guide part 642, in this invention, it is a pin The position where the accommodation groove 644 is formed is not particularly limited, and the position where the pin accommodation groove (pin accommodation portion) is formed is more proximal than the O-ring accommodation groove 644, that is, the O-ring accommodation groove 644 and the flange portion 63. It may be formed at any position between.

  The bathtub hot-water supply port adapter of the present invention can be used as a hot-water fitting for bathtubs for supplying hot water into the bathtub.

1: Outside tank attachment member 14: female side pipe part (connecting part)
14a: Lower female side pipe part (connecting part)
14b: Upper female side pipe part (connecting part)
142: Large diameter hole portion 143: Small diameter hole portion 144: Pin insertion hole (pin insertion portion)
6a: Outward pipe (outer pipe)
6b: Return pipe (outer pipe)
6: Joint pipe 64: Male pipe section 642: Guide section 643: Tip section 644: Pin housing groove (pin housing section)
65: O-ring receiving groove (seal member receiving groove)
66: O-ring (ring-shaped seal member)
71: Fixing pin W: Side wall

Claims (3)

A hot water adapter for a bathtub that is attached in a penetrating manner to the side wall of the bathtub and supplies hot water into the bathtub through an outer pipe,
A tank outer attachment member disposed on the outer surface of the side wall of the bathtub, and a joint pipe connected to the outer tank attachment member and connected to the outer pipe;
One of the connection parts of the outside-tubing attachment member and the joint pipe is configured as a female-side pipe part, and the remaining one is configured as a male-side pipe part to be inserted into the female-side pipe part. ,
The connection portion of the joint pipe is rotatably connected to the connection portion of the outside tank attachment member,
The hot water inlet adapter for bathtubs, wherein the joint pipe can be fixed at an arbitrary rotational position by friction between the male side pipe part and the female side pipe part.   The outer tube connected to the joint tube is rotatable between a configuration in which the outer tube is disposed in parallel to the axis of the tank outer mounting member and a configuration in which the outer tube is disposed in an orthogonal direction. The hot water outlet adapter for bathtubs as described in 2.   The hot water inlet adapter for bathtubs according to claim 1 or 2, wherein the outside-tub attachment member and the joint pipe are made of a hard synthetic resin.

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