JP4862497B2 - Bathtub circulation adapter, its fittings and combinations thereof - Google Patents

Description

  The present invention relates to a bathtub circulation adapter, a fixture used for attaching the bathtub circulation adapter to a bathtub, and a combination set of the bathtub circulation adapter and the fixture.

  The bathtub circulation adapter as used in this specification is attached to the side wall of the bathtub and connected to a heat source device installed outdoors or the like. While sending hot water to a heat source device, it plays a role as a nozzle for circulating hot water so that the hot water heated by this heat source device is returned into the bathtub. This bathtub circulation adapter is generally sometimes referred to as a bathtub circulation nozzle or simply a circulation fitting. Moreover, this bathtub circulation adapter can be utilized also as hot water filling to a bathtub, ie, a hot water discharge nozzle at the time of dropping hot water into a bathtub.

  In general, the bathtub circulation adapter has an external pipe connected to a heat source device installed outdoors or the like attached to the outer surface of the bathtub, and is connected to the external pipe connected from the inside of the bathtub. It has a structure in which a fastening body for fixing and other parts are assembled. As a method of attaching such a bathtub circulation adapter to the bathtub, there is a method as shown in FIG. In this method, as shown in FIG. 1A, first, a fixture 91 is attached to an external pipe connection body 90 of a bathtub circulation adapter, and a part of the fixture 91 is penetrated from the outside wall 92 of the house and the bathtub 93 from the outside. The holes 92a and 93a are inserted. Next, as shown in FIG. 5B, the operator enters the indoor and holds the fixture 91 to support the external pipe connection body 90 from the inside of the bathtub 93. Then, when the internal fastening body 94 is screwed and attached to the external pipe connection body 90 and the peripheral portion of the through hole 93a is sandwiched between the internal fastening body 94 and the external pipe connection body 90, these parts are fixed. Can be planned. According to such a method, the bathtub circulation adapter can be attached alone.

  In the operation as described above, it is necessary to prevent the external pipe connection body 90 from rotating together with the internal fastening body 94 when the internal fastening body 94 is tightened. Therefore, conventionally, as a means for preventing the rotation of the external pipe connection body 90, for example, as shown in FIG. 24, a concave groove 90b is formed on the distal end surface of the inner cylinder portion 90a of the external pipe connection body 90. There are means (see, for example, Patent Documents 1 and 2). In this means, the external pipe connector 90 is prevented from rotating by supporting the external pipe connector 90 so that a part of the fixture (not shown) is engaged with the concave groove 90.

  However, in the prior art, there are points to be improved as described below.

  That is, the thickness of the inner cylindrical portion 90a is usually small, and if the concave groove 90b is formed in such a portion, the strength of that portion is inferior. As a means for reducing the manufacturing cost of the external pipe connection body 90, it is conceivable that the material is made of resin. However, when the external pipe connection body 90 is made of such a material, the strength of the inner cylinder portion 90a is inferior. In other words, if rotational torque acts on the concave groove 90b, this portion may be damaged. In order to prevent this, it is necessary to increase the thickness of the inner cylindrical portion 90a. However, this causes an increase in cost and size of the component. Further, in the structure in which the concave groove 90b is formed at the tip of the inner cylindrical portion 90a, when a part of the fixture is engaged with the concave groove 90b, the engagement state is easily released, and workability may be deteriorated. there were. On the other hand, with respect to the fixture, it is necessary to form a portion for fitting into the concave groove 90b to be at least the same size as the outer diameter of the inner cylindrical portion 90a, which causes a problem that the portion is enlarged. In addition, in the prior art, for example, when a tubular member to which an O-ring is fitted is to be fitted into the inner cylinder portion 90a, the O-ring is caught in the concave groove 90b at the tip of the inner cylinder portion 90a. Sometimes it was damaged.

Japanese Patent No. 3358883 Japanese Patent Laid-Open No. 9-236326

  The present invention has been conceived under such circumstances, and the bathtub circulation adapter can be easily and appropriately attached without causing the problem of damaging the components of the bathtub circulation adapter. The challenge is to make it possible.

  In order to solve the above problems, the present invention takes the following technical means.

  The combination set of a bathtub circulation adapter and a fixture provided by the first aspect of the present invention includes a bathtub circulation adapter and a fitting for the bathtub circulation adapter. An external pipe connector that is arranged outside the through-hole forming portion of the side wall and that has a hole and a first screw portion having a larger diameter than the hole, and the first screw portion. An internal fastening body having a second screw portion that can be screwed together and screwed and attached to the external pipe connection body from the inside of the bathtub. A combination set of a bath circulation adapter and a fixture that is configured to be able to support the external pipe connector by being fitted into the hole, and a cross-sectional non-sectional view is provided at the tip of the fixture. A circular portion is formed and The outer wall of the cross-sectional non-circular portion is contacted with the inner wall of the section so as to prevent relative rotation between the distal end portion and the external pipe connector when the distal end portion of the fixture is inserted into the hole portion. It is characterized in that a rotation blocking wall that contacts is formed.

  According to such a configuration, when the tip of the fixture is fitted into the hole of the external pipe connector, the non-circular cross-section of the fixture and the rotation prevention wall of the inner wall of the hole contact each other. It is possible to prevent the fixture and the external pipe connector from rotating relative to each other. Therefore, when the internal fastening body is screwed and attached to the external pipe connection body, the external pipe connection body is prevented from rotating together with the internal fastening body, and the mounting work can be performed appropriately. On the other hand, the rotation prevention wall is formed on the inner wall of the hole portion of the external pipe connector, and the pressure resistance strength of this portion can be increased by taking a large area. Therefore, for example, even when the external pipe connection body is made of a synthetic resin, it is possible to ensure sufficient strength and make it difficult to cause damage to the portion. In addition, since the non-circular portion of the cross section of the fixture can be stably brought into contact with the rotation prevention wall while being fitted in the hole portion, the contact state is not easily released, and the external piping It is also possible to ensure the rotation stop state of the coupling body. Further, the cross-sectional non-circular portion of the fixture can be made smaller than the inner diameter of the hole, and the fixture has a larger diameter than the inner diameter of the hole as a means for preventing rotation of the external pipe connector. There is no need to form a size portion. Therefore, the increase in size of the fixture can also be suppressed. Furthermore, according to the present invention, the problem that the O-ring is easily damaged when the member fitted with the O-ring is fitted into the hole is also eliminated.

  In a preferred embodiment of the present invention, the cross-sectional non-circular portion of the fixture has a substantially D-shaped cross section in which a part of the outer surface is a flat portion, and the rotation prevention wall of the external pipe connection body is The flat surface portion has a flat surface portion in contact with the flat surface portion.

  According to such a structure, since the cross-sectional non-circular part of a fixture and the rotation prevention wall of an external piping coupling body are simple shapes, those formation becomes easy. Moreover, it is easy to increase the area of the rotation prevention wall, and it is more preferable to increase the pressure resistance. Furthermore, according to the said structure, only when the angle (angle around a shaft center) of a fixture is set to the fixed angle with respect to an external piping coupling body, it can insert a cross-sectional non-circular part in a hole. Thus, when the external pipe connector is supported by the fixture, an effect of defining these to have a certain relationship can be obtained. As will be described later, this effect is obtained when, for example, a locking projection is provided on the fixture, and the locking projection is aligned with a locking wall provided on the external pipe connector. Useful.

  In a preferred embodiment of the present invention, a portion of the inner wall of the hole portion that faces the rotation prevention wall is formed with a locking wall portion that faces the depth direction of the hole portion, A locking projection that is locked to the locking wall when the tip is fitted into the hole is formed on the outer surface of the fixture opposite to the flat surface. Is provided.

  According to such a configuration, the external pipe connection body can be positioned and fixed with respect to the fixture by the locking action of the locking wall portion and the locking projection. Also, if the tip of the fixture is inserted into the hole so that the flat surfaces of the non-circular cross section and the rotation prevention wall face each other, the locking protrusions are necessarily engaged with the locking wall. It will be arrange | positioned in the position which can be stopped, and those latching can also be made reliable.

  In a preferred embodiment of the present invention, the external pipe connector has a cylindrical portion that forms the hole portion therein, and a first mark provided on the outer surface of the cylindrical portion, The fixture is formed on the outer surface thereof, and the outer end of the non-circular cross section and the rotation prevention wall of the external pipe connector are in contact with each other, and the tip of the fixture is connected to the external pipe connector. A second mark that is aligned with the first mark when fitted into the hole.

  According to such a configuration, as will be described below, the fitting is provided on the outer surface of the cylindrical portion of the external pipe connection body when performing the operation of fitting the tip end portion of the fixture into the hole of the external pipe connection body. When the above operation is performed so that the second mark provided on the outer surface of the fixture is aligned with the first mark, the outer surface of the non-circular section of the fixture and the rotation of the external pipe connection body are rotated. The blocking walls are aligned with each other and properly come into contact with each other. The said rotation prevention wall is located in the hole part of an external piping coupling body, and is hard to see from the outside for an operator. On the other hand, according to the present invention, the first mark is provided on the outer surface of the cylindrical part forming the hole, and the second mark corresponding to the first mark is also provided on the fixture. This makes the above-described work easier. As the positioning effect by the first and second marks, in addition to the effect that the outer surface of the non-circular cross section and the rotation prevention wall can face each other appropriately, the insertion depth of the fixture is adjusted so that they properly contact each other. It is also possible to obtain the prescribed effect. More preferably, the first and second marks are both formed as convex portions, and are formed at the same time as resin molding of the fixture or the external pipe connector. Although the mark may be formed in a concave shape, the strength in the vicinity of the place where the mark is formed is lowered. On the other hand, if the mark is formed in a convex shape, such a situation can be appropriately avoided.

  The bathtub circulation adapter provided by the second aspect of the present invention is arranged on the outer side of the through-hole forming portion on the side wall of the bathtub, and has a hole portion and a first screw portion having a larger diameter than the hole portion inside. And a second screw part that can be screwed to the first screw part, and is screwed to the external pipe connector from the inside of the bathtub. An inner fastening body, wherein a tip end portion having a non-circular cross section of a fitting for a bath circulation adapter is fitted into the hole on the inner wall of the hole portion In addition, a rotation prevention wall that abuts against the outer surface of the non-circular section in cross section is formed so as to prevent relative rotation between the distal end portion of these fixtures and the external pipe connector.

  The fitting for a bathtub circulation adapter provided by the third aspect of the present invention is configured to insert the tip into a hole formed in the external pipe connection body of the bathtub circulation adapter, thereby fixing the external pipe connection body. An inner fastening body of the bathtub circulation adapter with respect to a first screw portion which is arranged on the outer side of the through hole forming portion on the side wall of the bathtub and is supported from the inner side of the bathtub and formed on the external pipe connection body A fitting for a bath circulation adapter used for the operation of screwing the second screw part from the inside of the bathtub, wherein the tip of the fitting is connected to the external pipe connector. A non-circular cross-section for preventing relative rotation between the distal end portion of the fixture and the external pipe connection body by the outer surface coming into contact with a part of the inner wall of the hole portion when fitted into the hole portion Part is formed There.

  According to the bathtub circulation adapter provided by the second and third aspects of the present invention and the fitting for the bathtub circulation adapter, the combination of the bathtub circulation adapter and the attachment provided by the first aspect of the present invention The same effect as described for the set can be obtained.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1-6 has shown one Embodiment of the fixture for bathtub circulation adapters and its component to which this invention was applied. As clearly shown in FIG. 1, the fixture A <b> 1 of the present embodiment includes a main body 1 and a slide member 2. The main body 1 and the slide member 2 are made of synthetic resin such as polypropylene, for example.

  The main body 1 has a form extending in a certain direction, and a grip portion 10 for a user to hold the fixture A1 by hand is integrally formed at a base end portion thereof. The grip portion 10 is formed in a hexagonal column shape, for example, and also serves as a wrench for tightening the internal fastening body 4 of the bathtub circulation adapter B as will be described later. A through hole 11 is formed in the grip portion 10. As shown in FIG. 3A and FIG. 5, the intermediate portion in the longitudinal direction of the main body 1 is, for example, a narrow plate-like base portion 120 and a downward direction from the central portion in the width direction of the base portion 120. A plurality of fan-shaped ribs 122 connecting the base portion 120 and the upright wall 121 are formed at appropriate intervals in the longitudinal direction thereof. . With such a configuration, the mechanical strength can be increased while saving raw materials and reducing the weight as compared with the case where the main body 1 is formed in a simple bar shape without ribs. The main body 1 is also provided with a rail section 13 having a substantially T-shaped cross section that extends in the longitudinal direction of the main body 1 and protrudes upward. The rail portion 13 is for holding the slide member 2 and for performing the slide guide. As will be described later, the rail portion 13 is provided with a plurality of notches 13a for attaching the slide member 2 to the rail portion 13.

  An auxiliary portion 14 is integrally formed at the distal end portion 1 a of the main body 1. As shown well in FIGS. 3B and 4, the auxiliary portion 14 has an arched upright portion having a semicircular arc cross section, and a tunnel-like space portion 18 formed inside the auxiliary portion 14. As will be described later, the distal end portion 2a of the slide member 2 can be fitted. A pair of slits 140, a small piece-shaped variable portion 141 formed between the slits 140, and a locking protrusion 15 formed on the upper surface of the variable portion 141 are provided on the auxiliary portion 14. . The locking projection 15 is for preventing the external pipe connector of the bathtub circulation adapter from coming off. The variable portion 141 can be bent and deformed with an elastic restoring force in the vertical direction indicated by the arrow N1, and the concave portion 142 formed in the base portion of the variable portion 141 is useful for smoothing such bending deformation. The variable portion 141 is inclined so that the height thereof becomes lower toward the base end portion of the main body 1 and is lower than the other portions on the upper portion of the auxiliary portion 14. As a result, the locking protrusion 15 is prevented from protruding upward from the other portions of the auxiliary portion 14 in a normal time when the distal end portion 2a of the slide member 2 is not fitted in the space portion 18. .

  The lower surface part 16 of the front-end | tip part 1a of the main body 1 is formed in planar shape. As will be described later, the lower surface portion 16 is useful for preventing rotation of the fixture A1 and the external pipe connector 3 of the bathtub circulation adapter B. Of the distal end portion 1a of the main body 1, the portion where the lower surface portion 16 is formed is a non-circular cross-sectional portion 1a ′ having a substantially D-shaped cross section.

  The slide member 2 is resin-molded separately from the main body 1, and as shown in FIGS. 6A and 6B, the semicircular arc-shaped portion 20 extends in a certain direction, and the inside thereof Has a configuration in which a plurality of ribs 21 are formed. Each rib 21 is formed with a T-shaped groove 22, and when the groove 22 is fitted to the rail portion 13 of the main body 1, the slide member 2 is attached to the main body 1, and an arrow As indicated by N2, the main body 1 can be reciprocated in the longitudinal direction. Note that the groove 22 may be a dovetail and the rail portion 13 may be configured in a shape corresponding to the dovetail. When attaching the slide member 2 to the main body 1, the grooves 22 are arranged in the notches 13 a of the rail portion 13 and the gaps between the rear end of the rail portion 13 and the grip portion 10, and then the slide member 2 is moved in the longitudinal direction of the rail portion 13 by an appropriate dimension. By this operation, each groove 22 can be appropriately fitted to the rail portion 13. On the upper surface of the rear portion of the slide member 2, an operation unit 24 for pressing a finger or the like when the slide member 2 is slid is formed. Preferably, the upper surface of the operation unit 24 is an uneven surface having a high anti-slip effect. Moreover, although the flange part 23 is formed in the rear end of the slide member 2, this flange part 23 can also be utilized for operation of the slide member 2 by picking with a finger | toe.

  The tip portion 2a of the slide member 2 is formed to have a smaller height and width than the other portions of the slide member 2, and as shown in FIG. It is possible to fit in. As a result, the locking protrusion 15 protrudes upward from the other part of the upper portion of the auxiliary portion 14. On the upper surface portion of the distal end portion 2a, a concave portion 2a 'having a downwardly inclined shape for avoiding a collision between the variable portion 141 of the main body 1 and the distal end portion 2a when the slide member 2 is advanced is formed. ing. As shown in FIG. 4C, when the tip 2a of the slide member 2 is fitted into the space 18, the variable portion 141 is backed up by the concave portion 2a '. The variable portion 141 and the locking protrusion 15 is prevented from descending.

  The rail portion 13 of the main body 1 is formed with a pair of engaging projections 17 that come into contact with the rear end portion of the slide member 2 when the slide member 2 is moved forward most. The engagement protrusion 17 does not hinder the sliding operation of the slide member 2 and is configured to give an appropriate click feeling to the operator when the rear end portion of the slide member 2 passes through the engagement protrusion 17. It is formed in size. This engagement protrusion 17 also exhibits an effect of preventing the slide member 2 from retreating carelessly. A projection 17 a having the same shape and size as the engagement projection 17 is formed at the rear end of the rail portion 13. If the flange portion 23 of the slide member 2 is disposed closer to the tip than the protrusion 17a, the slide member 2 is prevented from being inadvertently detached from the rail portion 13. The protrusions 17 and 17a are formed on the side surface of the rail portion 13 in the drawing, but may be formed on the upper surface of the rail portion 13 instead.

  Next, an example of the bathtub circulation adapter according to the present invention will be described with reference to FIGS.

  As shown in FIG. 10, the bathtub circulation adapter B of this embodiment is connected to a heat source device 82 that is attached to the side wall 81 of the bathtub 80 and installed outdoors or the like via, for example, two pipes 83. Is. As shown well in FIG. 8, the bathtub circulation adapter B includes an external pipe connection body 3, an internal fastening body 4, partition members 5 </ b> A and 5 </ b> B, and a cover filter 6.

  As shown in FIG. 7, the external pipe connector 3 is a member disposed on the outer surface side of the side wall 81 of the bathtub 80, and is connected to the heat source device 82 by piping. The external pipe connection body 3 has a configuration in which a pair of short pipe portions 31 a and 31 b for pipe connection are attached to the rear end portion of a housing 30 made of synthetic resin or metal. Although not shown in the drawing, the external pipe connector 3 is provided with a stopper for preventing the pair of short pipe portions 31 a and 31 b from coming off from the housing 30. Of course, the short pipe portions 31a and 31b and the housing 30 may be integrally formed.

  A first screw portion 33 is formed on the inner periphery of the outer peripheral wall 32 of the housing 30, and a substantially cylindrical inner tube portion 34 is formed on the inner side near the center of the housing 30. The distal end portion of the fixture A1 is inserted into the hole portion 35 of the inner cylinder portion 34, as will be described later. A flow path 36 that connects the hole 35 to the inside of the short pipe portion 31a is connected to the inner part of the hole 35, and the corner portion serves to prevent the fixture A1 from coming off. It is a stop wall 35a. The locking wall portion 35 a faces the back direction of the hole portion 35. A step portion 37 is formed in the inner portion of the hole portion 35, and an upper surface wall of the step portion 37 that faces the flow path 36 is a non-circular cross-sectional portion 1a ′ of the fixture A1, as will be described later. It is the rotation prevention wall 37a which prevents rotation of fixture A1 by making a face-to-face contact. The rotation prevention wall 37a is planar.

  The internal fastening body 4 is attached to the external pipe connection body 3 from the inside of the bathtub 80, and the outer peripheral surface of the internal fastening body 4 is screwed into the first screw portion 33 of the external pipe connection body 3. A second screw portion 40 is formed. The internal fastening body 4 and the external pipe connection body 3 are fixed to the side wall 81 by a pair of flanges 41 and 38 formed therebetween sandwiching the peripheral edge portion of the through hole 81 a of the side wall 81 of the bathtub 80. Between the flanges 41 and 38, packings 79a and 79b for water stop sealing are interposed. As shown in FIG. 9, a hexagonal hole 42 is formed inside the internal fastening body 4. The hole 42 is formed in a size that allows the gripping portion 10 of the fixture A1 to be fitted. As will be described later, the internal fastening body 4 is connected to the external pipe connector 3 using the gripping portion 10 of the fixture A1. Used when tightening firmly. A third screw portion 43 is formed at a position adjacent to the hole portion 42, and this is used when, for example, a water leak tester is screwed on. The internal fastening body 4 is made of, for example, reinforced plastic, and is made of a material having higher mechanical strength than the fixture A1.

  As shown in FIG. 7, partition members 5 </ b> A and 5 </ b> B and a cover filter 6 are assembled to the inner fastening body 4. The partition member 5 </ b> A includes a tube body portion 50 that fits into the hole portion 35 of the external pipe connector 3, and a flange plate portion 51 that is connected to the tube body portion 50, and the flange plate portion 51 includes a plurality of flange plate portions 51. The screw body 52 is used so as to come into contact with one side surface of the internal fastening body 4. The partition member 5B is a substantially disk-shaped member attached to the partition member 5A so as to form a hot water flow path between the partition plate 5 and the hot water in the bathtub 80 flows into the bathtub circulation adapter B. A plurality of inflow ports 53a and 53b, and valves 54a and 54b for opening and closing these portions. The cover filter 6 is formed by forming a plurality of small holes 60 for passing hot water in a portion of the front surface portion avoiding the front of the inflow ports 53a and 53b, and covers the front surface and the outer periphery of the partition member 5B. It is attached as follows. A plurality of discharge ports 55a and 55b for hot water are provided on the peripheral wall portion of the cover filter 6, and valves 56a and 56b are attached to intermediate portions of the hot water channel connected to the discharge ports 55a and 55b. It has been.

  The bathtub circulation adapter B has two passages 57A and 57B communicating with the short pipe portions 31a and 31b, respectively, and exhibits the following actions. That is, as shown in FIG. 11A, in the state where the short pipe portion 31a is on the return side and the short pipe portion 31b is on the forward side, the flow path 57A has a negative pressure, so the valve 54a is The hot water in the bathtub 80 is opened and flows into the flow path 57A from the inflow port 53a and returned to the heat source device 82. On the other hand, when hot water is supplied from the heat source device 82 into the flow path 57B, the pressure in the flow path 57B increases, so that the valve 56b opens and hot water is discharged into the bathtub 80 from the discharge port 55b. Unlike this, as shown in FIG. 5B, in the state where the short pipe portion 31a is set to the forward side and the short pipe portion 31b is set to the return side, the valve 56a is moved by the pressure increase in the flow path 57A. Open and hot water is discharged into the bathtub 80 from the discharge port 55a. On the other hand, since the pressure in the flow path 57B is negative, the valve 54b is opened and hot water in the bathtub 80 flows into the flow path 57B from the inlet 53b. Thus, in this bathtub circulation adapter B, hot water in the bathtub 80 can be appropriately circulated regardless of whether each of the short pipe portions 31a and 31b is set to the forward side or the return side. it can.

  The bathtub circulation adapter B can also be used for dropping hot water into the bathtub 80. That is, for example, as shown in FIG. 11 (c), when hot water is supplied to both the flow paths 57A and 57B from the short pipe portions 31a and 31b, the valves 54a and 54b are closed due to their pressures. In contrast, the valves 56a and 56b are opened by the pressure. Therefore, hot water is discharged into the bathtub 80 from each of the discharge ports 55a and 55b, and the flow rate when dropping hot water can be increased.

  Next, an example of a work procedure and an operation when the above-described bathtub circulation adapter B is attached to the bathtub 80 using the fixture A1 will be described.

  First, as shown in FIG. 12, the distal end portion 1 a of the main body 1 of the fixture A <b> 1 is inserted into the hole portion 35 of the external pipe connector 3. At the time of this insertion, the slide member 2 is moved backward so that the tip 2a is not fitted into the space 18 of the fixture A1. By doing so, the locking projection 15 does not protrude upward from the upper surface of the tip end portion 1a, and the locking projection 15 is not caught on the inner cylinder portion 34, so The tool A1 can be smoothly inserted into the hole 35. Of course, when removing the fixture A1 from the external pipe connector 3, the slide member 2 is retracted in such a manner so that the locking projection 15 is not projected. When the lower surface 16 of the non-circular section 1a ′ is set in a state of being in contact with the rotation prevention wall 37a at the time of the insertion, the locking protrusion 15 is necessarily formed on the locking wall 35a. It is aligned with the location to be locked. Thus, the cross-sectional non-circular portion 1a ′ and the rotation prevention wall 37a also exhibit a function of ensuring the locking operation between the locking projection 15 and the locking wall portion 35a.

  Next, the slide member 2 of the fixture A1 is advanced, and the tip 2a of the slide member 2 is fitted into the space 18 as shown in FIG. As a result, the variable portion 141 of the auxiliary portion 14 is pressed upward by the concave surface portion 2a ′ of the distal end portion 2a, and the variable portion 141 and the locking projection 15 are raised. As a result, the locking projection 15 is locked to the locking wall 35a. Further, since the variable portion 141 and the locking projection 15 are backed up by the tip portion 2a and the lowering thereof is prevented, the locking state between the locking projection 15 and the locking wall portion 35a is as follows. Secured and locked. Further, as described with reference to FIG. 2, when the slide member 2 is moved forward, the rear end portion of the slide member 2 gets over the protrusion 17 for engagement and causes a click feeling. The user can perceive that the slide member 2 has sufficiently advanced and that the above-described locked state has been obtained. Furthermore, since the engagement protrusion 17 also plays a role of suppressing the slide member 2 from moving backward, when the user releases the slide member 2, the slide member 2 moves carelessly. It can also be prevented that the locked state is released.

  As shown in FIG. 13, the lower surface portion 16 of the non-circular cross section 1 a ′ and the rotation prevention wall 37 a are in contact with each other, but since these are both planar, the fixture A 1 and the external pipe connection body 3 does not rotate relative to each other. Both the lower surface portion 16 and the rotation prevention wall 37a can be formed in a large area, and their pressure resistance can be increased so that they are not easily damaged. Further, when the slide member 2 moves forward, a portion near the tip portion 2 a also enters the hole portion 35, and a portion where the slide member 2 and the main body 1 are overlapped with each other is relatively positioned with respect to the hole portion 35. Can be closely fitted. Therefore, the external pipe connector 3 can be supported so as not to wobble by such a fitting action.

  Thereafter, as shown in FIG. 14, the user inserts the fixture A <b> 1 into the through hole 81 a of the side wall 81 from the outside of the bathtub 80 so as to place the external pipe connector 3 outside the bathtub 80. A portion near the grip 10 of the fixture A <b> 1 is disposed in the bathtub 80. Next, after entering the bathtub 80, the user grips the grip portion 10 of the fixture A <b> 1 and assembles the internal fastening body 4 to the external pipe connector 3. At the time of this assembling work, the inner fastening body 4 is brought close to the outer pipe connection body 3 by inserting the fixture A1 through the inner fastening body 4. On the other hand, the fixture A1 is configured to fix and support the external pipe connector 3 by fitting the tip portion of the fixture A1 into the inner tube portion 34 of the external pipe connector 3, and the fixture A1 is large on the outer surface of the fixture A1. There are no bulky parts. For this reason, even if the inner fastening body 4 has a relatively small inner diameter, the inner fastening body 4 is prevented from being caught on the mounting tool A1, and the mounting tool A1 hinders the assembly of the inner fastening body 4. It can be avoided.

  The assembly of the internal fastening body 4 to the external pipe connector 3 is performed by rotating the internal fastening body 4 and screwing the first and second screw portions 33 and 40 together. As described above, the distal end portion 2a of the slide member 2 prevents the locking projection 15 from descending, and the locking state between the locking projection 15 and the locking wall portion 35a is locked. Therefore, even when the external pipe connection body 3 is pressed with a relatively large force when the internal fastening body 4 is tightened, the external pipe connection body 3 is displaced due to this, and the fitting A1 is removed. There is no fear of dropping off. Moreover, since the external piping connection body 3 is supported in a rotation-stopped state with respect to the fixture A1 by the contact action between the lower surface portion 16 of the non-circular section 1a ′ and the rotation prevention wall 35a, the external piping connection There is no problem that the body 3 rotates together with the internal fastening body 4. The contact between the lower surface portion 16 and the rotation prevention wall 35a is preferably maintained as long as the distal end portion 1a of the fixture A1 enters the inner portion of the hole portion 35. Will not be released.

  When the user tightens the internal fastening body 4 to some extent by hand, the pair of flanges 38 and 41 sandwich the side wall 81, so that the internal fastening body 4 and the external pipe connection body 3 can be temporarily attached. However, the tightening torque is insufficient only by rotating the internal fastening body 4 by hand. Therefore, thereafter, the fixture A1 is removed from the external pipe connector 3 in order to fasten the inner fastening body 4 using the grip portion 10 of the fixture A1. This removal operation can be easily and quickly performed by retracting the slide member 2 to release the lock of the locking wall portion 35a and the locking projection 15 in the locked state.

  After removing the fixture A1, as shown in FIG. 15, the direction is changed, and the grip portion 10 is fitted into the hole 42 of the internal fastening body 4. Since both the grip portion 10 and the hole portion 42 are hexagonal, they do not rotate relative to each other, and the inner fastening body 4 can be tightened by rotating the fixture A1. At this time, for example, when the shaft portion 78a of the driver 78 is inserted into the through hole 11 of the gripping portion 10, the driver 78 can be used as a handle for rotation, and the internal fastening body 4 can be tightened with an appropriate torque. It becomes possible.

  In consideration of the actual construction site, the contractor misunderstands that the tightening torque of the internal fastening body 4 is preferably as large as possible. For example, a large spanner is used to tighten the internal fastening body 4 with an excessive torque. It can be assumed that However, if the internal fastening body 4 is tightened with an excessive torque in this way, a large residual stress is generated in the internal fastening body 4 or a member in contact with the internal fastening body 4 and there is a possibility that creep damage will occur during long-term use. . On the other hand, in this embodiment, since the material of the fixture A1 is made of, for example, polypropylene having a mechanical strength lower than that of the internal fastening body 4, the gripping portion 10 is rotated with an excessive torque using a spanner. If it tries to do so, the hexagonal corners of the grip 10 will be removed, making it difficult to rotate. Thereby, it is suppressed appropriately that the inner fastening body 4 is fastened with an excessive torque. Further, since the internal fastening body 4 is made of a material having a high mechanical strength, the creep rupture as described above is less likely to occur. Furthermore, when the gripping part 10 is made of a viscous material such as polypropylene, for example, it is possible to prevent generation of shaving powder when a corner part is taken by a spanner.

  As described above, according to the fixture A1 of the present embodiment, the external pipe connector 3 can be prevented from coming off simply by inserting the tip portion into the hole 35 of the external pipe connector 3 and sliding the slide member 2. Support with proper rotation prevention can be performed with good operability. In addition, the fixture A1 has a simple configuration in which the main body 1 and the slide member 2 are combined, and any of these can be easily manufactured by resin molding. Therefore, the manufacturing cost can be reduced.

  16 to 22 show another embodiment of the present invention. In these drawings, elements that are the same as or similar to those in the above embodiment are given the same reference numerals as in the above embodiment.

  16 and 17 includes an auxiliary body 7 connected via a connecting portion 70 to a main body 1A having a gripping portion 10 at a base end portion. The auxiliary body 7 and the connecting portion 70 are integrally formed with the main body 1A, but the present invention is not limited to this. The auxiliary body 7 has a shape elongated in the same direction as the main body 1A, and its longitudinal intermediate portion is generally formed in a vertically symmetrical shape with the longitudinal intermediate portion of the main body 1A. Yes. More specifically, as shown in FIG. 17A, the intermediate portion in the longitudinal direction of the auxiliary body 7 includes a narrow plate-like base portion 720 and a center portion in the width direction of the base portion 720. It has a substantially inverted T-shaped cross section having an upstanding wall 721 protruding upward, and a plurality of ribs 722 that connect the base portion 120 and the upstanding wall 121 are formed at appropriate intervals in the longitudinal direction. ing. However, a locking projection 15 protruding upward is formed on the upper surface of the distal end portion 7 a of the auxiliary body 7. The auxiliary body 7 is not provided with a portion corresponding to the slit 140 of the previous attachment A1.

  A gap is formed between the front end portion 7a and the base end portion 7b of the auxiliary body 7 and the main body 1A, and the auxiliary body 7 extends in the vertical direction facing the main body 1A with the connecting portion 70 as a fulcrum. It can swing. A spring portion 73 is formed between the end portion of the auxiliary body 7 and the main body 1A. The spring portion 73 plays a role of maintaining the size of the gap between the main body 1A and the auxiliary body 7 constant. When the gap between the tip portions 7a, 1a is narrowed, the gap is restored to the original. In order to return to the dimension, the tip 7a of the auxiliary body 7 is opposed to the main body 1A and exerts an action of elastically urging upward. This spring portion 73 can also be integrally formed with the auxiliary body 7 and the main body 1A. In the present embodiment, as shown in FIG. 17 (b), a planar lower surface portion 16 is also formed at the distal end portion 1a of the main body 1a, and a portion where the lower surface portion 16 is formed, The combination part with the front-end | tip part 7a of the auxiliary body 7 located in the upper part becomes the cross-sectional non-circular part said by this invention.

  As shown in FIG. 18, in order to support the external pipe connector 3 of the bathtub circulation adapter using the fixture A <b> 2 of this embodiment, the distal end portion of the fixture A <b> 2 is inserted into the hole 35 of the external pipe connector 3. To do. At the time of this insertion, the base end portion 7b of the auxiliary body 7 is lifted upward. In this manner, the tip 7a of the auxiliary body 7 is lowered, and the vertical heights of the tips 7a, 1a of the auxiliary body 7 and the main body 1A and the vicinity thereof are reduced. It can be smoothly inserted into the portion 35.

  In the state where the distal end portion of the fixture A2 is inserted into the hole portion 35, conversely to the above, when a force F1 for pushing down the base end portion 7b of the auxiliary body 7 is applied, an ascending force F2 is generated at the distal end portion 7a. The locking state with the locking wall portion 35a can be appropriately maintained so that the locking projection 15 does not descend. The operation of pushing down the base end portion 7b can be performed such that the user holds the base end portion 7b of the auxiliary body 7 and the main body 1 with one hand, and the operation is easy. Further, the above-described ascending force F2 also causes an action of pressing the outer surfaces of the auxiliary body 7 and the main body body 1A near the distal ends against the inner wall surface of the hole 35, thereby wobbling the external pipe connection body 3. It can be supported so that there is no. Further, similarly to the previous embodiment, a planar rotation prevention wall 37a is in contact with the lower surface portion 16 of the front end portion of the main body 1A, and this action also appropriately rotates the external pipe connection body 3. Be blocked. Thus, also in this fixture A2, it is possible to support the external pipe coupling body 3 appropriately by an easy operation, and thereafter, the work for assembling the internal fastening body 4 to the external pipe coupling body 3 is also accurate. Can be done.

  Moreover, in this fixture A2, the effect | action which the spring part 73 elastically urges | biass the front-end | tip part 7a of the auxiliary body 7 upward is also acquired. For this reason, even if the user releases his / her hand from the base end portion 7b of the auxiliary body 7, the locking state between the locking wall portion 35a and the locking projection 15 is not immediately released. Is possible. Furthermore, also in this fixture A2, like the fixture A1 of the previous embodiment, the overall height and width of the fixture A2 can be reduced. When the body 4 is assembled, the attachment A2 is also prevented from interfering with the work. In addition, the attachment A2 is easy to manufacture because the main body 1A and the auxiliary body 7 are integrally formed. Even if the main body 1A and the auxiliary body 7 are molded separately, the total number of parts of the fixture A2 is small and easy to assemble, so the manufacturing cost is also reduced. be able to.

  The attachment A3 shown in FIG. 19 has a configuration in which the auxiliary body 7 is connected to the main body 1A so as to be swingable, similarly to the attachment A2. However, the connecting portion 70 serving as a swing fulcrum of the auxiliary body 7 connects the main body 1A and the distal end portions 1a and 7a of the auxiliary body 7. A flat lower surface portion 16 is formed at the distal end portion 1a of the main body 1A, and a portion obtained by combining this portion with the distal end portion 7a of the auxiliary body 7 positioned above the portion is a non-cross-sectional view as referred to in the present invention. It is a circular part. As shown in FIG. 20, a stopper 75 is provided at the base end portion 7 b of the auxiliary body 7, which can be brought into contact with the main body 1 </ b> A by bending the middle portion thereof. In the main body 1A, on both sides of the portion where the stopper 75 abuts, a pair of protrusions that serve as marks of the abutting location of the stopper 75 and prevent displacement when the stopper 75 abuts. A portion 19 is formed. Between the longitudinal intermediate portions of the main body 1 </ b> A and the auxiliary body 7, a spring portion 74 that connects them is also provided. This spring portion 74 is useful for preventing the base end portion 7b side of the auxiliary body 7 from opening at a large angle, for example, during normal handling of the fixture A3.

  In this fixture A3, as shown in FIG. 20, when the proximal end portion 7b of the auxiliary body 7 is lifted upward after the distal end portion is inserted into the hole portion 35 of the external pipe connector 3, the distal end portion 7a side. Will also lift upwards. As a result, the locking protrusion 15 can be locked and held on the locking wall portion 35a. If the stopper 75 is bent and brought into contact with the main body 1A, the state in which the base end portion 7b is raised can be fixed. Therefore, even if the user releases the hand from the fixture A3, The stop state is properly maintained. Further, when the base end portion 7b side of the auxiliary body 7 is raised from the normal angle, the spring portion 74 exerts an elastic force to return it, so that the stopper 75 Even with the force, the main body 1A comes into contact more strongly, and the effect of stabilizing the contact state can also be obtained.

  The main body 1B of the fixture A4 shown in FIG. 21 has a gripping portion 10 and a shaft-like portion 100 having one end connected to the gripping portion 10, and the slide member 2 and the auxiliary member of the above-described embodiment. A separate movable member corresponding to the body 7 is not provided. As shown in FIG. 22A, a hole 10 a for attaching a screw member 99 such as a bolt is provided at the rear part of the grip 10. The shaft-like portion 100 is a portion for fitting into the hole portion 35 of the external pipe connector 3. For example, the main body 1 </ b> A and the auxiliary body 7 of the embodiment shown in FIG. 16 are fixed to each other and combined. Approximate to form. More specifically, as shown in FIGS. 21 (c) and 21 (d), the shaft-like portion 100 is formed with a slit 109 penetrating through a substantially cross-shaped section or a central section having a substantially cross-shaped cross section. And a plurality of ribs 100b provided at appropriate intervals in the longitudinal direction of the shaft main body 100a. The contour of the portion where the rib 100b is provided is a circular shape that can be fitted into the hole 35 of the external pipe connector 3 with little play. According to such a structure, compared with the case where the substantially whole shaft-like part 100 is formed in, for example, a simple columnar shape, it is possible to reduce the weight of the entire fixture and save the raw material resin. However, it goes without saying that a portion other than the tip portion 100c of the shaft-like portion 100 may be a columnar shape or other shapes.

  The tip end portion 100c of the shaft-like portion 100 has a gap portion 101 that is open at the tip and both side portions, and an upper piece portion 102a and a lower piece portion 102b that face each other with the gap portion 101 interposed therebetween. As shown in FIG. 21E, the upper piece portion 102a has, for example, a circular arc shape in cross section, while the lower piece portion 102b has, for example, a substantially rectangular shape in cross section, and these upper piece portion 102a and lower piece portion 102b. The formation part of the cross section is a non-circular section in the present invention. The upper piece 102a and the lower piece 102b can be bent and deformed with an elastic restoring force in the direction closer to the gap 101. A locking projection 15 is provided on the outer surface of the upper piece 102a.

  On the outer surface of the shaft-like portion 100 of the fixture A4, a mark convex portion 103 is provided at a position closer to the grip portion 10 than the locking projection 15 is. The convex portion 103 corresponds to an example of a second mark referred to in the present invention. On the other hand, as shown in FIGS. 22 (a) and 22 (b), on the outer surface of the inner cylinder portion 34 of the external pipe connection body 3, there is an elongated rib-shaped mark extending in the axial length direction of the inner cylinder portion 34. A convex portion 34a is formed. The convex portion 34a corresponds to an example of the first mark referred to in the present invention. This convex portion 34a is preferably provided so as to be positioned at the uppermost portion of the outer surface of the inner cylindrical portion 34 when the external pipe connector 3 is set to an appropriate original mounting angle posture. In this way, at the time of installation of the external pipe connection body 3, the external pipe connection body 3 is properly attached by adjusting the posture of the external pipe connection body 3 so that the convex portion 34a becomes the uppermost part. An angular posture can be set. In addition, as will be described later, when the positioning with the mark convex portion 103 of the fixture A3 is performed, the convex portion 34a is easily seen by the operator. When these protrusions 103 and 34a are aligned, the distal end portion 100c of the fixture A3 sufficiently enters the hole portion 35 of the external pipe connection body 3, and the locking projection 15 is the locking wall portion. The outer surface of the lower piece portion 102b is provided in such a manner that the outer surface of the lower piece portion 102b is appropriately in contact with the rotation prevention wall 37a. The alignment of the protrusions 103 and 34a is a state in which they abut or approach each other and are aligned in a line in the axial length direction of the central axis of the hole 35 (the angles around the central axis of the hole 35 match). Set to the state). In FIG. 22 (a), the convex portions 103 and 34a are shown to be in direct contact with each other. However, for example, the convex portion 103 is in contact with the tip surface of the inner cylinder portion 34, and the convex portion 103 The parts 103 and 34a may be separated from each other.

  In the present embodiment, as shown in FIG. 22 (a), when the external pipe connector 3 is supported using the fixture A4, the mounting is performed so that the convex portions 103 and 34a for the mark are aligned with each other. What is necessary is just to make the front-end | tip part 100c of tool A4 approach into the hole 35 of the external piping connection body 3. FIG. In this case, as described above, the locking projection 15 is locked to the locking wall portion 35a, and the planar outer surface of the lower piece portion 102b comes into contact with the rotation prevention wall 37a. While preventing the fixture A4 from easily coming off the connector 3, it is possible to appropriately prevent these relative rotations. The rotation prevention wall 37a is located in the back part in the hole part 35, and it is difficult for an operator to confirm this part visually. For this reason, unlike the present embodiment, when the above-described mark convex portions 103 and 34a are not provided, when the tip portion 100c is inserted into the hole portion 35, the tip portion 100c and the hole portion are formed. 35 may not fit well, and the end surface of the tip portion 100c may come into contact with the stepped portion in front of the rotation prevention wall 37a, so that the tip portion 100c cannot be advanced further. In such a case, the insertion operation of the tip end portion 100c must be repeated while changing the angle of the tip end portion 100c. On the other hand, according to the present invention, the mark convex portions 103 and 34a are provided at easy-to-see positions, and it is only necessary to align them, and the troublesomeness as described above is appropriately eliminated. In addition, since the operator can confirm that the fitting A4 is properly attached to the external pipe connector 3 by the alignment of the convex portions 103 and 34 for the mark, the operator can be relieved during the work. The feeling will also increase. The convex portions 103, 34a for the mark of the present embodiment or the similar means can be applied to the fixture and the external pipe connection body of other embodiments of the present invention.

  The locking projection 15 of the fixture A4 has a front lower sloped surface (an inclined surface that becomes lower toward the tip of the fixture A4), and its rear part is a rear lower slope opposite thereto. It is an inclined surface. These inclined surfaces are not limited to flat surfaces, and may be curved surfaces. According to such a configuration, it is possible to appropriately perform the attaching / detaching work of the fixture A4 with respect to the external pipe connector 3 as described below. That is, when the distal end portion 100 c of the fixture A <b> 4 is advanced into the hole portion 35, the front portion of the locking projection 15 comes into contact with the distal end surface of the inner cylinder portion 34. On the other hand, if the front portion is a front-lowering inclined surface, the upper piece portion 102a of the distal end portion 100c is bent downward by the force with which the inclined surface abuts against the distal end surface of the inner cylindrical portion 34. The locking projection 15 can be appropriately advanced into the hole 35. When the locking projection 15 advances further to the back than the locking wall portion 35a, the upper piece 102a is restored and lifted by its elasticity, so that the rear portion of the locking projection 15 is moved to the locking wall portion. It can be made to latch appropriately with respect to 35a, and it can prevent attachment fixture A4 from coming off easily with the weak force from the external piping coupling body 3. FIG. On the other hand, when pulling out the fixture A4 from the external pipe connector 3, a relatively strong force is applied in the pulling direction. If it does in this way, the upper piece part 102a of the front-end | tip part 100c will bend below by the force in which the inclined surface of the rear part of the latching protrusion 15 contact | abuts to the latching wall part 35a. As a result, the locking state between the locking projection 15 and the locking wall 35a is released, and the fixture A4 can be appropriately pulled out from the external pipe connector 3. In this embodiment, unlike the other embodiments described above, the fixture A4 is not provided with movable members such as the slide member 2 and the auxiliary body 7, and the operator does not need to operate them. . Since the tip end portion 100c of the fixture A4 only needs to be inserted into and removed from the hole 35 of the external pipe connector 3, the workability is further improved.

  From the viewpoint of reducing the manufacturing cost of the fixture A4 and improving the convenience in carrying, etc., it is desired to make the overall length as short as possible and to reduce the size. However, when comprised in this way, if the thickness of the side wall 81 of the bathtub 80 is quite large, as shown to Fig.22 (a), the internal fastening body 4 connected with the external piping connection body 3 will be with fixture A4. In the relationship, there is a case where it is disposed at a position as indicated by reference numeral N3 in the same figure (the inner fastening body 4 has a long axial length dimension so that the threaded connection with the outer pipe connecting body 3 can be appropriately performed. Have been). In such a state, the dimension s1 of the portion exposed to the outside of the inner fastening body 4 in the grip portion 10 of the fixture A4 is small, and it is difficult for the operator to grip this portion. In such a case, in the present embodiment, a screw member 99 such as a bolt is attached to the hole 10a at the rear of the gripping portion 10, and this is used as an auxiliary gripping portion, and the fixture A4 is appropriately held. Is possible. Therefore, the size reduction of the fixture A4 can be appropriately realized. The hole 10a may be a screw hole, but is instead formed as a non-screw hole for tapping (a so-called screw hole), and the screw member 99 is forcibly screwed into the non-screw hole. It doesn't matter.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the bathtub circulation adapter and its fitting according to the present invention can be varied in design in various ways.

  The non-circular section of the fixture according to the present invention has a shape different from the substantially D-shaped cross section, for example, a substantially rectangular cross section, a triangular shape, a pentagonal or more polygonal shape, an elliptical shape, or other various shapes. It can also be formed. The rotation prevention wall of the external pipe connection body can be changed corresponding to the specific shape of the non-circular cross section of the fixture, and instead of the flat shape, it can be formed in a curved shape, or the flat surface and the curved surface can be It can also be formed on a combined surface.

  The fixture referred to in the present invention is not limited as long as it can support the external pipe connection body by fitting the tip part into the hole of the external pipe connection body, and the specific configuration for supporting the attachment is not limited. .

  The external pipe connection body as referred to in the present invention is arranged on the outer side of the through-hole forming portion on the side wall of the bathtub and is pipe-connected to the heat source device. An internal fastening body is connected with respect to an external piping connection body from the inner side of a bathtub. The specific shape, material, size and the like of each of the external pipe connection body and the internal fastening body are not limited. Moreover, although the meaning of the bathtub circulation adapter as used in the field of this invention is described at the beginning, the concrete structure is also not limited.

It is a front view which shows an example of the fixture of the bathtub circulation adapter which concerns on this invention. It is a front view which shows the state which advanced the slide member of the fixture of the bathtub circulation adapter shown in FIG. (A) is the IIIa-IIIa sectional view of FIG. 1, (b) is the IIIb-IIIb sectional view of FIG. 1, (c) is the right side view of FIG. (A) is a principal part top view of the fixture of the bathtub circulation adapter shown in FIG. 1, (b) is IV-IV sectional drawing of (a), (c) is shown to (b). It is principal part sectional drawing of the operation state of a part. (A) is a top view which shows the main body of the fixture of the bathtub circulation adapter shown in FIG. 1, (b) is the front view. (A) is a front view which shows the slide member of the fixture of the bathtub circulation adapter shown in FIG. 1, (b) is VI-VI sectional drawing of (a), (c) is (a). FIG. It is sectional drawing which shows an example of the bathtub circulation adapter which concerns on this invention. It is a disassembled perspective view of the bathtub circulation adapter shown in FIG. (A) is sectional drawing of the internal fastening body of the bathtub circulation adapter shown in FIG. 7, (b) is the left view. It is a perspective view which shows typically the attachment state of the bathtub circulation adapter shown in FIG. (A)-(c) is sectional drawing which shows the effect | action of the bathtub circulation adapter shown in FIG. It is principal part sectional drawing which shows the state which inserted the front-end | tip part of the fixture shown in FIG. 1 in the external piping connection body of the bathtub circulation adapter. It is principal part sectional drawing which shows the state which latched and supported the front-end | tip part of the fixture shown in FIG. 1 to the external piping coupling body of the bathtub circulation adapter. It is principal part sectional drawing which shows the operation | work which assembles | attaches the internal fastening body of a bathtub circulation adapter, supporting an external piping coupling body with the fixture shown in FIG. It is principal part sectional drawing which shows the operation | work which fastens the internal fastening body of a bathtub circulation adapter using the fixture shown in FIG. It is a front view which shows the other example of the fixture of the bathtub circulation adapter which concerns on this invention. (A) is XVIIa-XVIIa sectional drawing of FIG. 16, (b) is XVIIb-XVIIb sectional drawing of FIG. It is principal part sectional drawing which shows the use condition of the fixture of the bathtub circulation adapter shown in FIG. It is a front view which shows the other example of the fixture of the bathtub circulation adapter which concerns on this invention. It is principal part sectional drawing which shows the use condition of the fixture of the bathtub circulation adapter shown in FIG. (A) is a top view which shows the other example of the fixture of the bathtub circulation adapter which concerns on this invention, (b) is a front view, (c) is XXIc-XXIc sectional drawing of (b). (D) is an XXId-XXId sectional view of (b), and (e) is an XXIe-XXIe sectional view of (b). (A) is principal part sectional drawing which shows the usage example of the bathtub circulation adapter shown in FIG. 21, (b) is XXII-XXII sectional drawing of (a). (A), (b) is explanatory drawing which shows an example of the basic procedure which attaches the component of a bathtub circulation adapter to a bathtub. It is a perspective view which shows an example of a prior art.

Explanation of symbols

A1-A4 Bath circulator adapter F Mark)
35 hole portion 35a locking wall portion 37a rotation prevention wall 80 bathtub 81 side wall (of bathtub)
81a Through hole (on the side wall of the bathtub)
103 Convex part for mark (second mark)

Claims (6)

It has a bathtub circulation adapter and a fitting for this bathtub circulation adapter,
The bathtub circulation adapter is arranged on the outer side of the through-hole forming portion on the side wall of the bathtub, and an external pipe connector in which a hole and a first screw part having a larger diameter than the hole are formed inside And an internal fastening body having a second screw portion that can be screwed to the first screw portion, and screwed and attached to the external pipe connection body from the inside of the bathtub,
The fitting is a combination set of a bathtub circulation adapter and a fitting that is configured to be able to support the external pipe connection body by inserting a tip portion of the fitting into the hole.
A non-circular cross section is formed at the tip of the fixture,
The outer surface of the non-circular section in the cross section so as to prevent relative rotation between the distal end portion and the external pipe connector when the distal end portion of the fixture is fitted into the hole portion on the inner wall of the hole portion. A combination set of a bathtub circulation adapter and a fixture, characterized in that a rotation prevention wall that abuts on the surface is formed. The non-circular cross section of the fixture has a substantially D-shaped cross section in which a part of the outer surface is a flat portion,
The combination set of a bathtub circulation adapter and a fixture according to claim 1, wherein the rotation prevention wall of the external pipe connection body has a flat surface portion in contact with the flat surface portion. Of the inner wall of the hole portion, a portion facing the rotation prevention wall is formed with a locking wall portion facing the inner portion of the hole portion, and
A locking projection that is locked to the locking wall when the tip is fitted into the hole is formed on the outer surface of the fixture opposite to the flat surface. The combination set of the bathtub circulation adapter and attachment of Claim 2 provided. The external pipe connection body has a cylindrical portion that forms the hole portion therein, and a first mark provided on the outer surface of the cylindrical portion,
The fixture is formed on the outer surface thereof, and the outer end of the non-circular cross section and the rotation prevention wall of the external pipe connector are in contact with each other, and the tip of the fixture is connected to the external pipe connector. The combination set of the bathtub circulation adapter and the fixture according to any one of claims 1 to 3, further comprising a second mark that is aligned with the first mark when fitted into the hole of the bathtub. . An external pipe connector that is arranged outside the through-hole forming portion of the side wall of the bathtub, and in which a hole and a first screw portion having a larger diameter than the hole are formed,
An internal fastening body having a second screw portion that can be screwed to the first screw portion, and screwed to the external pipe connection body from the inside of the bathtub;
A bathtub circulation adapter comprising:
When the tip having a non-circular cross-sectional portion of the fitting for the bathtub circulation adapter is fitted into the hole on the inner wall of the hole, the relative rotation between the tip of the fitting and the external pipe connector is performed. The bathtub circulation adapter is characterized in that a rotation prevention wall that abuts against the outer surface of the non-circular section is formed. By inserting the tip into the hole formed in the external pipe connection body of the bathtub circulation adapter, the external pipe connection body is arranged on the outer side of the through hole formation portion on the side wall of the bathtub, and from the inside of the bathtub. The second screw portion of the internal fastening body of the bathtub circulation adapter is screwed from the inside of the bathtub to the first screw portion that is supported and formed on the external pipe connector. A fitting for a bathtub circulation adapter,
When the distal end portion of the fixture is fitted into the hole portion of the external pipe connector, the outer surface abuts on a part of the inner wall of the hole portion. A fitting for a bathtub circulation adapter, wherein a cross-sectional non-circular portion is formed to prevent relative rotation between the external pipe connection body and the external pipe connection body.

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