JP4815924B2 - Fixture for bathtub circulation adapter and combination set of bathtub circulation adapter and fixture - Google Patents

Description

The present invention relates to a fixture used for attaching a 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. That is, first, as shown in FIG. 1A, 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 connected to the outer wall 92 of the house and the through-hole 92a of the bathtub 93 from the outside. , 93a. 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 work as described above, in order to properly attach the external pipe connection body 90 and the internal fastening body 94 to the bathtub 3, the internal fastening body 94 is rotated with a strong torque and is sufficiently connected to the external pipe connection body 90. It is necessary to tighten. Therefore, in the related art, after the internal fastening body 94 is manually tightened to some extent, the pipe wrench L is hooked on the screw hole boss 94a protruding from the surface of the internal fastening body 94, for example, as shown in FIG. Thus, there is means for rotating the internal fastening body 94 (see, for example, Patent Document 1).

  However, according to the prior art, since the pipe wrench L is hooked on the small protrusion-like boss 94a and rotated, the pipe wrench L is easily detached from the boss 94a, and the workability is poor. On the other hand, in recent years, there has been a strong demand for thinning of this kind of bathtub circulation adapter. In order to meet this demand, there is a case where it is desired to design the internal fastening body 94 so as not to provide the boss 94a. However, if so, even the tightening operation using the pipe wrench L becomes difficult as described above.

Japanese Patent No. 3358883

  The present invention has been conceived under such circumstances, and is capable of easily and appropriately performing the tightening operation of the internal fastening body with respect to the external piping connection body of the bathtub circulation adapter. That is the issue.

  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 which is disposed outside the through hole forming portion of the side wall and has a hole and a first screw portion having a larger diameter than the hole formed therein; and the first screw And an internal fastening body that is screwed onto the external pipe connection body from the inside of the bathtub. The bathtub circulation adapter and the mounting are configured such that the end portion is a gripping portion, and the distal end portion on the opposite side is fitted into the hole of the external pipe connection body so that the external pipe connection body can be supported. A combination set with tools, The fastening body is provided with a non-circular fastening hole concentrically with the second screw portion, and the whole or a part of the grip portion of the fixture rotates relative to the fastening hole. The grip portion is configured to have a wrench function for rotation operation of the internal fastening body by being formed in a non-circular cross section that cannot be fitted.

  According to such a configuration, when the inner fastening body of the bathtub circulation adapter is screwed into the outer pipe coupling body and tightened, the gripping portion of the fixture can be inserted into the tightening hole of the inner fastening body and rotated. It will be good. Therefore, as compared with the case where the internal fastening body is rotated using the screw hole boss of the prior art, the work is much easier, the workability is improved, and the working time is shortened. Further, even when the internal fastening body is not formed with a convex portion such as a screw hole boss or other hooking portion, the internal fastening body can be fastened. Furthermore, since the fixture used to support the external piping connection body of the bathtub circulation adapter can be used as a tightening wrench for the internal fastening body, its configuration is reasonable, and a dedicated fastening tool is separately provided. It is more convenient without preparation.

  In a preferred embodiment of the present invention, when the gripping part is fitted into the fastening hole, a shaft-like member for fastening operation different from the fitting can be inserted into the fixture. A penetrating or non-penetrating hole is provided.

  According to such a configuration, for example, after gripping the fixture with a hand and tightening the internal fastening body to some extent, an appropriate shaft-like member such as a driver shaft is inserted into the hole and the shaft-like member is rotated. If so, the inner fastening body can be tightened with a stronger torque.

  In a preferred embodiment of the present invention, both the fixture and the internal fastening body are resin molded products, and the fixture is made of a resin having lower mechanical strength than the internal fastening body.

  According to such a configuration, when the grip portion of the fixture is, for example, a hexagonal column shape, and an excessive torque is applied to this portion using a large spanner, the fixture is better than the internal fastener. Since the mechanical strength is low, it is possible to expect an effect that the angle of the grip portion of the fixture is taken and the spanner and the grip portion slide. If it does in this way, it will prevent that an internal fastening body is tightened with an excessive torque, and it will be prevented that a huge residual stress will generate | occur | produce in an internal fastening body and a creep failure will arise. Since the internal fastening body is made of a material having high mechanical strength, such creep rupture is more reliably prevented.

The fitting for a bathtub circulation adapter provided by the second aspect of the present invention has a base end portion as a grip portion, and a distal end portion on the opposite side is formed on an external pipe connection body of the bathtub circulation adapter. The outer pipe connection body is disposed outside the through hole forming portion of the side wall of the bathtub and supported from the inside of the bathtub, and is formed in the external pipe connection body. A fitting for a bathtub circulation adapter used for an operation of screwing a second screw part of an internal fastening body of the bathtub circulation adapter from the inside of the bathtub to a screw part of the bathtub, the gripping part Is formed in a non-circular cross-section that fits into the non-circular fastening hole provided in the inner fastening body concentrically with the second screw portion so as not to rotate relative to the non-circular fastening hole. The gripping part of the internal fastening body It is characterized by being configured to include a rolling wrench function for operation.

According to the fitting for the bathtub circulation adapter provided by the second aspect of the present invention, it is the same as described for the combination set of the bathtub circulation adapter and the attachment provided by the first aspect of the present invention. An effect is 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 of the bathtub circulation adapter 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 10 is formed in a hexagonal column shape, for example, and also has a wrench function for tightening the inner fastening body 4 of the bathtub circulation adapter B as will be described later. A through hole 11 is formed in a portion of the gripping portion 10 near the distal end portion 1 a of the main body 1. 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.

  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. Of course, the groove 22 may be a dovetail and the rail portion 13 may have 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 a bathtub circulation adapter to which the present invention is applied 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 rear portion of the external pipe connector 3. A step portion 37 is formed on the inner wall at the back of the hole portion 35, and an upper surface wall of the step portion 37 that faces the flow path 36 is formed as a planar wall portion 37 a. The wall portion 37a is useful for preventing relative rotation between the fixture A1 and the external pipe connector 3 when the tip of the fixture A1 is inserted into the hole 35.

  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 fastening hole 42 penetrating in the axial length direction of the internal fastening body 4 is formed in the internal fastening body 4. The tightening hole 42 is concentric with the second screw portion 40 and is formed in a size that allows the gripping portion 10 of the fixture A1 to be fitted. As will be described later, the tightening hole 42 is used when the internal fastening body 4 is fastened to the external pipe connector 3 by using the grip portion 10 of the mounting tool A1, but the fastening tool A1 is internally fastened. It also serves as a through-hole for passing through the body 4, and also serves as a hole constituting a hot water flow channel after the bathtub circulation adapter B is assembled. A third screw portion 43 is formed at a position adjacent to the tightening hole 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. Further, at the time of the insertion operation, when the distal end portion 1a of the main body 1 is inserted into the hole portion 35 and the lower surface portion 16 thereof is set in a state of facing the wall portion 37a of the external pipe connector 3, The locking protrusion 15 is necessarily aligned with a position where the locking protrusion 15 is locked to the locking wall 35a. Thus, the lower surface portion 16 and the wall portion 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 main body 1 and the wall portion 37a of the external pipe connector 3 are in contact with each other, but since both of these are flat, the fixture A1 and the external pipe There is no relative rotation with the connector 3. 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 closer to the external pipe connection body 3 by inserting the fixture A1 into the fastening hole 42 of 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 pipe connection body 3 is supported in a rotation-stopped state with respect to the fixture A1, there is no problem that the external pipe connection body 3 rotates together with the internal fastening body 4.

  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 tightening hole 42 of the internal fastening body 4. Since both the grip portion 10 and the tightening hole 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. Even when a non-through hole is provided in the grip portion 10 in place of the through hole 11, substantially the same operation as described above is 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 present embodiment, the fixture A1 is not only used for supporting the external pipe connection body 3, but can also be suitably used for tightening the internal fastening body 4, which is convenient. is there. The operation of fitting and rotating the grip portion 10 of the fixture A1 into the tightening hole 42 of the internal fastening body is easy and its workability is also good.

  16 to 20 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.

  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, as in the previous embodiment, the planar wall portion 37a of the external pipe coupling body 3 is in contact with the planar lower surface portion 16 at the front end of the main body 1A. The rotation of the body 3 is also prevented appropriately. 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. 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.

  A wrench for tightening the internal fastener 4 is configured in the same manner as the grip 10 of the fixture A1 of the previous embodiment with respect to the grip 10 of the fixtures A2 and A3 of the embodiment shown in FIGS. It can be used as As can be understood from this, the present invention can be applied to various attachments regardless of the specific support means of the external pipe connection body 5 of the bathtub circulation adapter B.

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

  In the present invention, the specific cross-sectional shape of the grip portion of the fixture and the specific shape of the tightening hole of the internal fastening body to be fitted to this are not limited to the hexagonal shape. As means for disabling relative rotation between the gripping portion and the tightening hole, both of them may be formed in a non-circular shape, and various non-circular shapes other than hexagons (for example, a triangle, a rectangular shape, a pentagonal shape) The above-described polygonal shape, elliptical shape, partially cut-out circular shape, gear shape in which a large number of irregularities are arranged on the outer periphery or the inner periphery, and the like can be used.

  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 definition of the bathtub circulation adapter as used in the field of this invention is described at the beginning, the concrete structure is not limited, either.

It is a front view which shows an example of the fixture for bathtub circulation adapters concerning this invention. It is a front view which shows the state which advanced the slide member of the fixture for bathtub circulation adapters 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 for bathtub circulation adapters shown in FIG. 1, (b) is IV-IV sectional drawing of (a), (c) is (b). It is principal part sectional drawing of the operation state of the part shown. (A) is a top view which shows the main body of the fixture for bathtub circulation adapters shown in FIG. 1, (b) is the front view. (A) is a front view which shows the sliding member of the fixture for bathtub circulation adapters shown in FIG. 1, (b) is VI-VI sectional drawing of (a), (c) is (a) ). It is sectional drawing which shows an example of the bathtub circulation adapter to which this invention is applied . 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 for bathtub circulation adapters concerning 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 for bathtub circulation adapters shown in FIG. It is a front view which shows the other example of the fixture for bathtub circulation adapters concerning this invention. It is principal part sectional drawing which shows the use condition of the fixture for bathtub circulation adapters shown in FIG. (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-A3 Bath circulation adapter 1 B Tip circulation adapter 1a Tip 3 External pipe connection body 4 Internal fastening body 10 Grasping part 11 Through hole 33 First screw part 35 Hole part 40 Second screw part 42 For tightening Hole 80 Bathtub 81 Side wall (of bathtub)
81a Through hole (on the side wall of the bathtub)

Claims (4)

It has a bathtub circulation adapter and a fitting for this bathtub circulation adapter,
The bathtub circulation adapter is disposed on the outer side of the through hole formation portion on the side wall of the bathtub, and has an outer pipe connection in which a hole portion and a first screw portion having a larger diameter than the hole portion are formed. And 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. ,
The mounting tool is configured to be able to support the external pipe connection body by having a base end part as a grip part and a distal end part on the opposite side being fitted into a hole of the external pipe connection body. A combination set of a bathtub circulation adapter and a fixture,
The inner fastening body is provided with a non-circular fastening hole concentrically with the second screw portion,
The whole or a part of the grip portion of the fixture is formed in a non-circular cross-section that fits in a relatively non-rotatable manner with respect to the tightening hole. It is set as the structure provided with the wrench function for, The combination set of the bathtub circulation adapter and the fixture characterized by the above-mentioned.   The fixture is provided with a through-hole or non-through-hole that allows insertion of a shaft-like member for fastening operation different from the fixture when the grip portion is fitted into the fastening hole. The combination set of the bathtub circulation adapter and attachment of Claim 1 currently attached. The fixture and the internal fastening body are both resin molded products,
The combination set of a bathtub circulation adapter and a fixture according to claim 1 or 2, wherein the fixture is made of a resin having a mechanical strength lower than that of the internal fastening body. The base end portion is a gripping portion, and the distal end portion on the opposite side is fitted into a hole formed in the external pipe connection body of the bathtub circulation adapter, thereby allowing the external pipe connection body to penetrate the side wall of the bathtub. The second screw of the inner fastening body of the bathtub circulation adapter with respect to the first screw portion that is arranged on the outer side of the hole forming portion and is supported from the inner side of the bathtub and is formed on the external pipe connection body It is a fitting for a bathtub circulation adapter used for the work of screwing the part from the inside of the bathtub,
The whole or a part of the grip portion is provided on the inner fastening body concentrically with the second screw portion.
The non-circular tightening hole is formed in a non-circular cross-section that fits in a non-rotatable manner, and the gripping portion has a wrench function for rotating the internal fastening body. A fitting for a bathtub circulation adapter.

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