JP2023128217A - Branch metal fitting for faucet - Google Patents

Abstract

To provide a branch metal fitting for a faucet, capable of improving constructibility, and position holding property after construction.SOLUTION: A branch metal fitting for a faucet includes: a branch pipe part 22 branched from a main pipe part forming a water channel; a pipe joint 3 fitted so as to superpose arrangement in the pipe axial direction on an opening end portion 22A of the branch pipe part 22; an escape groove A1 formed on an outer peripheral surface of a fitted pipe portion 31A of the pipe joint 3 so as to extend in the pipe circumferential direction; and a machine screw B fixed to a fixed pipe portion 22b of the branch pipe part 22 and projecting so as to enter into the escape groove A1. The escape groove A1 has a key groove A2 in a part in the pipe circumferential direction so as to extend in the pipe axial direction. Entering of the machine screw B into the key groove A2 with slide of the pipe joint 3 in the pipe axial direction with respect to the branch pipe part 22 restricts slide of the pipe joint 3 in the pipe circumferential direction with respect to the branch pipe part 22, and coming-off of the machine screw B from the key groove A2 permits slide of the pipe joint 3 in the pipe circumferential direction.SELECTED DRAWING: Figure 7

Description

The present invention relates to a branch fitting for a faucet. Specifically, the present invention relates to a branch fitting for a faucet that has a main pipe section forming a water passage and a branch pipe section branching from the main pipe section.

Patent Document 1 discloses a branch fitting that divides a water passage into two parts. This branch fitting includes a main pipe section that guides hot water to a faucet, and a branch pipe section that branches off from the main pipe section and guides hot water to other faucet appliances (such as a dishwasher or a water purifier). A pipe joint that connects the branch pipe to other faucet equipment is connected to the branch pipe so as to be rotatable around the pipe axis. This allows piping construction to be carried out by freely changing the orientation of the pipe joint to match the conditions at the construction site.

JP 2019-210963 Publication

In the configuration described in Patent Document 1, the pipe joint is rotatably connected to the branch pipe section. Therefore, after construction, the pipe joint may rotate in an unintended direction due to the action of an external force, causing excessive tension or kinking to occur in the connecting piping that connects it to other faucet equipment. Therefore, the present invention provides a faucet branch fitting that can improve workability and improve position retention performance after construction.

In order to solve the above problems, the faucet branch fitting of the present invention takes the following measures. That is, a first aspect of the present invention is a branching fitting for a faucet, which has a main pipe section forming a water passage, and a branch pipe section branching from the main pipe section, wherein the opening end of the branch pipe section a pipe fitting that is fitted so that the positions in the pipe axial direction overlap and is supported by the branch pipe section so as to be slidable in the pipe axial direction and the pipe circumferential direction; the pipe joint and the branch pipe part; A relief groove formed on the outer circumferential surface of the inner fitting tube part of the inner and outer double fitting tube parts fitted with the inner and outer fitting tube parts, and fixed to the outer fitting tube part. a protruding pin that protrudes so as to enter the relief groove, the relief groove having a keyway extending in the tube axis direction in a part of the tube circumferential direction, and the relief groove having a key groove extending in the tube axis direction, As the protruding pin slides in the pipe axial direction with respect to the pipe section, the protruding pin enters the key groove, thereby restricting the sliding of the pipe fitting in the pipe circumferential direction with respect to the branch pipe part, and the protruding pin moves into the key groove. This is a branch fitting for a faucet that allows sliding of the pipe joint in the pipe circumferential direction by coming out of the groove.

According to the first invention, the projecting pin can be moved in and out of the keyway by simply moving the pipe joint in the pipe axis direction relative to the branch pipe part, and the pipe joint can be moved relative to the branch pipe part. You can switch between locking and unlocking the rotation. Therefore, for example, when performing construction work such as connecting other connecting pipes to a pipe joint, the pipe joint can be rotated to a position that is easy to work with, and after construction, the pipe joint can be rotationally locked and held in place with a single touch. It can be carried out. Thereby, it is possible to improve the workability of piping construction and the position holding performance after construction.

A second aspect of the present invention is that in the first aspect, the relief groove has a U-shaped cross section that can restrict bidirectional movement of the protruding pin in the tube axis direction within a groove width. This is a branch fitting for a faucet.

According to the second aspect of the invention, by utilizing the structure in which the protruding pin enters the escape groove, it is possible to rationally configure a retaining structure for the branch pipe portion of the pipe joint.

A third invention of the present invention is that in the first or second invention, the keyway is separated from the escape groove so that the protruding pin enters when the pipe joint is separated from the branch pipe portion in the pipe axis direction. This is a branch fitting for a faucet that extends out.

According to the third invention, the direction in which the pipe joint is separated from the branch pipe section is the direction in which the pipe joint is rotationally locked. As a result, the direction in which the pipe joint is rotationally locked is the same as the direction in which the pipe joint is subjected to force such that it is pulled away from the branch pipe portion by water flow pressure. Therefore, it is possible to prevent an unexpected situation in which the rotation lock of the pipe joint is unintentionally released during use.

A fourth invention of the present invention is that in any one of the first to third inventions, the inner fitting tube part is constituted by the pipe joint, and the outer fitting tube part is constituted by the branch pipe. This is a branch fitting for a faucet that is composed of two parts.

According to the fourth invention, the escape groove is formed in the pipe joint that constitutes the inner fitting pipe portion. Therefore, even if the branch pipe part is made of a casting integrally molded with the main pipe part, which makes it difficult to perform complicated machining, each component can be machined relatively easily.

A fifth invention of the present invention is the faucet branch fitting according to any one of the first to fourth inventions, wherein the keyway is formed at a plurality of locations in the pipe circumferential direction of the relief groove.

According to the fifth invention, it is possible to selectively lock the rotation of the pipe joint at a plurality of rotational positions, thereby further improving convenience.

A sixth aspect of the present invention is that in any one of the first to fifth aspects of the invention, the combination of the protruding pin and the keyway into which the protruding pin is inserted is arranged in a water column set at a plurality of locations in the circumferential direction of the pipe. This is a branch fitting for a stopper.

According to the sixth invention, the strength of the rotation lock of the pipe joint can be increased. Further, it is possible to suppress the inclination of the pipe joint with respect to the branch pipe portion.

A seventh invention of the present invention is that in any one of the first to sixth inventions, the pipe is provided between the branch pipe section and the pipe joint, and the projecting pin and the keyway are arranged in the pipe circumferential direction. The branch fitting for a faucet further includes an elastic means that applies an elastic force so that the protruding pin enters the keyway when the positions are aligned.

According to the seventh invention, by turning the pipe joint to the desired position for rotation locking and releasing the hand, the rotation can be automatically locked by the elastic force. Moreover, the elastic force of the elastic means can appropriately hold the pipe joint in a rotationally locked state.

An eighth invention of the present invention is based on the seventh invention, wherein the elastic means is assembled to a seat portion to be fixed in position inside the outer fitting tube portion, and a seat portion that is assembled from the seat portion to the inner fitting tube portion. a support member having a shaft portion extending in the tube axis direction toward the inside of the joint tube portion; and a support member having a shaft portion extending in the tube axis direction toward the inside of the joint tube portion; This branch fitting for a faucet consists of a compression coil spring that exerts a repulsive force.

According to the eighth invention, it is possible to provide a configuration in which the elastic means can be incorporated and provided inside the outer fitting pipe portion so as not to spoil the appearance of the faucet branch fitting.

A ninth aspect of the present invention is that in the eighth aspect, the shaft portion extends in the tube axis direction to the inside of the inner fitting tube portion, and the tube This is a branch fitting for a faucet in which an intermediate flow path is formed that penetrates in the axial direction and forms a flow path between the outer fitting pipe part and the inner fitting pipe part.

According to the ninth invention, the shaft portion including the intermediate flow path complicates the flow path from the inside of the outer fitting tube portion to the sealing surface between the outer fitting tube portion and the inner fitting tube portion. This makes it difficult for foreign matter to get into the sealing surface. Specifically, the flow path to the sealing surface passes through the intermediate flow path of the shaft, wraps around between the shaft and the inner fitting tube, passes between them, and then goes further into the inner fitting tube. It is formed as a detour that goes around between the mating tube section and the outer fitting tube section.

A tenth aspect of the present invention is that in any one of the first to ninth aspects of the invention, the relief groove including the keyway has a movable range in the pipe axis direction with respect to the branch pipe portion of the pipe joint. In the above, the faucet branch fitting is formed at a position that does not protrude from the outer fitting pipe portion in the pipe axis direction.

According to the tenth invention, even if the pipe joint is moved in the pipe axial direction with respect to the branch pipe portion, the key groove and the relief groove are not exposed to the outside. Therefore, it is possible to suppress the occurrence of malfunctions due to foreign matter such as dust entering the relief groove.

An eleventh invention of the present invention is that in any one of the first to tenth inventions, the branch fitting for a water faucet is configured such that the pipe joint is unitized as a rotary elbow in the branch pipe portion, and the sink A water stop valve configured as a branch stopcock arranged such that the main pipe section extends in the height direction and the branch pipe section extends in a direction intersecting the height direction inside a cabinet provided below. This is a branch fitting for a stopper.

According to the eleventh invention, piping construction can be easily performed in a narrow space under the sink by freely changing the direction of the pipe joint to suit the situation at the construction site without using any tools. Moreover, after construction, the pipe joint can be maintained in a state where it does not rotate even if it interferes with other piping. Therefore, the connection pipe connected to the pipe joint can be appropriately fixed in position in a narrow space under the sink where interference with other pipes is likely to occur.

FIG. 1 is a perspective view showing a schematic configuration of a faucet branch fitting according to a first embodiment. FIG. 3 is an exploded perspective view of the pipe joint removed from the branch pipe section. FIG. 3 is a partially sectional front view corresponding to FIG. 2; It is a partial cross-sectional perspective view showing the state where the pipe joint is assembled to the branch pipe part. 5 is a partially sectional front view corresponding to FIG. 4. FIG. It is a partial cross-sectional perspective view showing the initial state of a pipe joint. 7 is a partially sectional front view corresponding to FIG. 6. FIG. FIG. 3 is a partially sectional front view showing a state in which the pipe joint is pushed into the branch pipe section.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

《First embodiment》
(Schematic configuration of faucet branch fitting 1)
First, the configuration of a faucet branch fitting 1 according to a first embodiment of the present invention will be explained using FIGS. 1 to 8. In the following description, when directions such as front, back, top, bottom, left, right, etc. are indicated, they refer to the respective directions shown in each figure. The directions shown in each figure are the directions when the faucet branch fitting 1 according to the present embodiment is viewed from the front. In the following description, when a specific reference figure is not shown or a reference figure does not have a corresponding numeral, any of the figures in FIGS. 1 to 8 will be referred to as appropriate.

As shown in FIG. 1, a faucet branch fitting 1 according to the present embodiment is a branch stop valve installed in a space under a kitchen sink, that is, inside a cabinet (not shown) provided below the sink. Constructed as. The faucet branch fitting 1 includes a fitting main body 2 made of a copper alloy, and a pipe joint 3 made of a copper alloy elbow connected to a branch pipe portion 22 of the fitting main body 2.

The faucet branch fitting 1 also includes a rotatable upper handle 4 that adjusts the flow rate of the main pipe section 21 forming the water passage of the fitting body 2, and a rotary operation type upper handle 4 that adjusts the flow rate of the branch pipe section 22 of the fitting body 2. A lower handle 5 is provided. Further, the faucet branch fitting 1 further includes an elastic means 6 that applies a spring biasing force in the tube axis direction between the pipe joint 3 and the branch pipe portion 22 in order to lock the rotation of the pipe joint 3 with respect to the branch pipe portion 22 .

The faucet branch fitting 1 has a unitized structure in which the fitting main body 2, the pipe joint 3, the upper handle 4, the lower handle 5, and the elastic means 6 are assembled into one and carried to the construction site. be done. The water faucet branching fitting 1 is constructed so that a water supply pipe P1 extending from under the floor of the cabinet is connected to the opening end 21A of the fitting main body 2 on the lower side in the figure. Thereby, the faucet branch fitting 1 is configured to receive hot water or water (hereinafter referred to as hot water) from the water supply pipe P1 on the lower side of the figure.

Further, the faucet branching fitting 1 is constructed such that a water faucet (not shown) is connected to the opening end 21B of the fitting main body 2 on the upper side in the drawing via a connecting pipe P2. Thereby, the faucet branch fitting 1 is configured to allow hot water supplied from the water supply pipe P1 on the lower side of the figure to flow to a water supply faucet (not shown) via the connection pipe P2.

In addition, in the faucet branch fitting 1, other faucet appliances (not shown, such as a dishwasher or a water purifier) are connected to the pipe fitting 3 connected to the branch pipe portion 22 via another connection pipe P3. The piping will be constructed so that the Thereby, the faucet branching fitting 1 branches the hot water supplied from the water supply pipe P1 on the lower side of the figure from the pipe fitting 3 to other faucet equipment (not shown) via another connection pipe P3. It is considered to be a composition.

As shown in FIGS. 2 and 3, the pipe joint 3 is fitted and connected from the left side in the figure into the open end 22A of the branch pipe section 22 on the left side in the figure. After the above-mentioned fitting, as shown in FIGS. 4 and 5, the corresponding screws B are inserted into the screw holes B1 formed through the outer circumference of the branch pipe section 22 at two positions, upper and lower, in the pipe radial direction. tightened from the outside. Thereby, the pipe joint 3 is assembled into the branch pipe portion 22 via each screw B in a state where it is prevented from coming off. Here, each screw B corresponds to the "protruding pin" of the present invention.

Each screw B is tightened to a position where it enters the relief groove A1 formed on the outer circumference of the pipe joint 3. Thereby, the pipe joint 3 is assembled to the branch pipe section 22 via each screw B in a state where it is prevented from falling off in the pipe axis direction. The escape groove A1 has a concave U-shaped cross section that can restrict the bidirectional movement of each screw B in the tube axis direction within the range of the groove width.

On the other hand, the relief groove A1 has a concave shape extending annularly in the pipe circumferential direction along the outer circumference of the pipe joint 3. Therefore, even if the pipe fitting 3 is rotated around the pipe axis with respect to the branch pipe section 22 from the state in which each screw B is assembled inside, the relief groove A1 is in contact with each screw B in the pipe circumferential direction. It is designed not to come into contact with it. For this reason, even when the pipe joint 3 is tightened so that each screw B enters inside the relief groove A1, rotation around the pipe axis (sliding in the pipe circumferential direction) with respect to the branch pipe portion 22 is prevented. It has become acceptable.

As shown in FIG. 4, the relief groove A1 has key grooves A2 formed at six positions in the circumferential direction of the tube, which are recessed in the shape of a semicircle toward the right side in the figure so as to be able to receive each screw B in the tube axis direction. The structure is said to be These key grooves A2 are formed at six positions in the pipe circumferential direction of the relief groove A1 and are arranged at equal intervals. When the pipe joint 3 is rotated around the pipe axis with respect to the branch pipe section 22 by the operator, two of the keyways A2 and each screw B are aligned in the circumferential direction of the pipe. It is designed to be aligned or shifted as desired.

By matching the arrangement of the two keyways A2 and each screw B in the pipe circumferential direction, the pipe joint 3 is in a state where it can slide toward the left side in the figure with respect to the branch pipe portion 22. Therefore, by sliding the pipe joint 3 to the left in the figure from this state, each screw B fits into the corresponding two keyways A2, as shown in FIGS. 6 and 7. By this fitting, rotation of the pipe joint 3 about the pipe axis (sliding in the pipe circumferential direction) with respect to the branch pipe portion 22 is restricted via each screw B.

As shown in FIGS. 2 and 3, the above-mentioned pipe joint 3 is specifically configured to incorporate an elastic means 6 having a compression coil spring 62 between it and the branch pipe portion 22. As shown in FIGS. As a result, as shown in FIGS. 6 and 7, when the pipe fitting 3 is assembled to the branch pipe section 22, the elastic means 6 always presses the spring to the left side in the drawing with respect to the branch pipe section 22. It is said to be configured to apply force.

Due to this spring biasing force, in the free state of the pipe fitting 3, each screw B fits into the right inner side surface of the relief groove A1 or the inside of each corresponding key groove A2, and the right side surface of each key groove A2 as shown in the figure It is held by being pressed against the inner surface. With the above configuration, the pipe joint 3 is pushed toward the left side in the figure by the spring biasing force of the elastic means 6 when the two keyways A2 and each screw B are aligned through the rotation thereof. As a result, each screw B fits into the corresponding two keyways A2, and rotation of the pipe joint 3 relative to the branch pipe portion 22 is locked.

Furthermore, as shown in FIG. 8, the pipe fitting 3 is pushed toward the right side in the figure by the operator against the spring biasing force of the elastic means 6, so that the two key grooves that have been fitted into each screw B are removed. A2 is removed from each screw B to the right in the drawing. Thereby, each screw B switches to a state in which it enters the relief groove A1. As a result, the rotational lock of the pipe fitting 3 with respect to the branch pipe section 22 is released, and the pipe joint 3 becomes in a state where it can be freely rotated around the pipe axis with respect to the branch pipe section 22.

After adjusting the rotational position of the pipe joint 3 with respect to the branch pipe portion 22 to a desired position, the pushing force to the right side in the figure by the operator is released, and the pipe joint 3 is again moved to the left side in the figure by the spring biasing force of the elastic means 6. The rotation is locked (see Fig. 7). Specifically, the pipe joint 3 is configured to be rotationally locked at each position at intervals of 60 degrees in the circumferential direction of the pipe where each screw B fits into each corresponding keyway A2.

With the above configuration, the pipe joint 3 can be locked in the adjusted desired orientation. In this way, the faucet branch fitting 1 automatically locks the rotation of the pipe fitting 3 relative to the branch pipe portion 22 by the spring biasing force, or locks the rotation by pushing the pipe fitting 3 against the spring biasing force. Equipped with a spring-type locking mechanism that can be released. With such a configuration, the faucet branch fitting 1 can be easily inserted into the branch pipe portion of the pipe fitting 3 by an operator simply pushing in and releasing the push-in of the pipe fitting 3 by hand without using any tools. It is possible to switch between locking and allowing rotation relative to 22.

As shown in FIG. 1, the faucet branch fitting 1 has a configuration in which the pipe fitting 3 is preliminarily integrated into the branch pipe part 22 as described above, so that the pipe fitting 3 can be used in a narrow space under the sink. The configuration does not require the work of connecting to the branch pipe section 22. Furthermore, by simply pushing the pipe fitting 3 toward the branch pipe section 22 toward the right side in the figure, the worker can switch to a state in which the direction of the pipe fitting 3 consisting of an elbow can be freely changed to suit the situation at the construction site. It will be done. Therefore, the work of connecting another connection pipe P3 to the pipe joint 3 can be easily performed in a narrow space under the sink.

Moreover, after connecting the connecting pipe P3 to the pipe fitting 3, by adjusting the pipe fitting 3 in a desired direction and releasing the pushing force, the direction of the pipe fitting 3 with respect to the branch pipe portion 22 is locked in the desired direction. can do. Therefore, the pipe joint 3 can be fixed in a direction suitable for the wiring route of the connecting pipe P3. As a result, after a series of piping construction, the pipe fitting 3 and the connecting pipe P3 connected to the pipe fitting 3 will not rotate even if they interfere with other pipes (not shown) routed in the narrow space under the sink. can be maintained in the same state.

(Composition of each part)
Hereinafter, the specific configuration of each part of the faucet branch fitting 1 will be described. As shown in FIG. 1, the metal fitting body 2 includes a circular pipe-shaped main pipe portion 21 that forms a vertical water passage extending in the vertical direction in the drawing, and a circular pipe that branches the water passage from the middle of the main pipe portion 21 to the left in the drawing. It has a branch pipe portion 22 having a shape. The metal fitting main body 2 is made of a cast product in which a main pipe part 21 and a branch pipe part 22 are integrally formed by casting. The main pipe portion 21 forms a vertical passageway that extends straight between the open end 21A on the lower side in the figure and the open end 21B on the upper side in the figure.

(Branch pipe section 22)
The branch pipe section 22 forms a horizontal water passage branched from the main pipe section 21 so as to extend perpendicularly to the left in the figure. As shown in FIGS. 2 and 3, the branch pipe section 22 has a pipe section extending toward an open end 22A on the left side in the figure, and a fitting pipe section 22B into which the pipe joint 3 can be fitted. is formed as. Here, the fitting tube part 22B corresponds to the "outer fitting tube part" of the present invention.

Round screw holes B1 penetrating in the tube diameter direction are formed in the outer circumferential portion of the fitting tube portion 22B at two positions, upper and lower in the drawing. Each screw hole B1 has a female thread cut on its inner peripheral surface.

The inner peripheral portion of the fitting tube portion 22B is formed in a stepped shape in which the inner diameter gradually increases from the base end (right end in the drawing) in the tube axis direction toward the open end portion 22A. Specifically, the inner peripheral portion of the fitting tube portion 22B has an enlarged diameter portion B3, a reduced diameter portion B2, and a locking seat B4 from the open end 22A on the left side in the drawing toward the base end (right end in the drawing). The shapes are arranged continuously in the tube axis direction.

The enlarged diameter portion B3 forms the inner peripheral portion of the pipe on the open end side facing the open end 22A on the left side in the drawing of the fitting tube portion 22B. The enlarged diameter portion B3 has an inner circumferential surface formed into a smooth annular surface that is concentric with the channel of the fitting tube portion 22B. The reduced diameter portion B2 forms an inner peripheral portion of the pipe on the upstream side of the enlarged diameter portion B3. The inner peripheral surface of the reduced diameter portion B2 is formed into a concentric smooth annular surface that is slightly smaller than the enlarged diameter portion B3. The locking seat B4 is formed as an annular seat portion forming a step between the reduced diameter portion B2 and the inner circumferential portion of the conduit whose diameter is further reduced on the upstream side thereof.

The above-mentioned fitting tube part 22B is set in such a state that an elastic means 6, which will be described later, and a fitting tube part 31A of the pipe joint 3 are loosely fitted in order from the open end 22A on the left side in the drawing ( (See Figures 4 and 5). By the above assembly, the fitting tube part 22B is set in such a state that the seat part 61A of the elastic means 6, which will be described later, is applied to the locking seat B4 in the tube axial direction from the left side in the figure over the entire circumferential direction. Ru. Here, the fitting tube section 31A of the pipe joint 3 corresponds to the "inner fitting tube section" of the present invention.

Further, the fitting tube portion 22B is set such that a fitting tube portion 31A of a pipe joint 3, which will be described later, is loosely fitted in the reduced diameter portion B2 in the tube axis direction. As a result, the O-ring R attached to the outer circumferential portion of the fitting tube portion 31A is pressed against the inner circumferential surface of the reduced diameter portion B2 in a state in which it is in close contact with the entire circumferential region of the tube. The screw holes B1 described above are formed at two positions in the enlarged diameter portion B3 of the fitting tube portion 22B, upper and lower in the figure, so as to be vertically aligned with each other toward the center of the tube axis.

(Pipe fitting 3)
As shown in FIGS. 2 and 3, the pipe joint 3 is connected to a stepped circular main body pipe portion 31 that extends straight in the left-right direction in the figure, and a connection port 31B formed on the outer periphery of the main body pipe portion 31. It has a circular pipe-shaped connecting pipe part 32. The pipe joint 3 is configured to be unitized as an elbow forming an L-shaped pipe joint by connecting the main body pipe portion 31 and the connecting pipe portion 32.

Specifically, in the pipe joint 3, the connecting pipe portion 32 is screwed into the connecting port 31B of the main body pipe portion 31, which opens at the upper side in the drawing, from the upper side in the drawing, so that the pipes communicate with each other internally. integrally connected. Through this connection, the pipe joint 3 is assembled so that the open end on the right side in the drawing of the main body pipe portion 31 and the open end on the upper side in the drawing of the connecting pipe portion 32 communicate with each other to form an L-shaped conduit. The main body tube portion 31 has a circular tube shape with a closed end on the left side in the figure.

The main body tube portion 31 is formed as a fitting tube portion 31A in which a circular tube portion on the right end side in the figure forms a concentric circular tube shape that is slightly smaller than a circular tube portion on the left end side in the figure. A relief groove A1 is formed in the outer peripheral portion of the fitting tube portion 31A at an intermediate portion thereof in the tube axis direction, and is depressed in a shape that extends annularly in the tube circumferential direction. The relief groove A1 is a groove into which each of the screws B described above is tightened. The aforementioned key grooves A2 are formed at six positions in the circumferential direction of the relief groove A1.

Further, on the outer circumferential portion of the fitting tube portion 31A, an annular groove A3 that is depressed in a shape that extends annularly in the tube circumferential direction is formed at an intermediate portion in the tube axis direction that is off to the right side in the drawing from the region where the relief groove A1 is formed. has been done. A rubber O-ring R is fitted into this annular groove A3. As shown in FIG. 3, the proximal end A5 on the left side of the relief groove A1 on the outer periphery of the fitting tube portion 31A has approximately the same outer diameter, which is slightly smaller than the inner diameter of the enlarged diameter portion B3 of the branch tube portion 22. It is formed into a concentric smooth annular surface.

As shown in FIGS. 2 and 3, the fitting tube portion 31A is inserted and fitted into the tube of the fitting tube portion 22B of the branch tube portion 22 from the open end 22A on the left side in the drawing in the tube axis direction. Specifically, the fitting tube section 31A is set in the fitting tube section 22B of the branch tube section 22 by the following procedure. First, a shaft portion 61B of the elastic means 6, which will be described later, and a compression coil spring 62 passed through the shaft portion 61B are inserted into the fitting tube portion 31A from the open end on the right side in the figure, and the elastic means 6 is inserted into the fitting tube. Assemble to part 31A.

Next, as shown in FIGS. 4 and 5, the fitting tube section 31A with the elastic means 6 assembled is inserted into the fitting tube section 22B of the branch tube section 22 together with the elastic means 6. As a result, as shown in FIG. 5, the seat portion 61A of the elastic means 6, which will be described later, is passed into the reduced diameter portion B2 of the branch pipe portion 22, and the seat portion 61A of the elastic means 6, which will be described later, is passed into the reduced diameter portion B2 of the branch pipe portion 22, and is engaged with the locking seat B4 over the entire circumferential direction from the left side in the figure. It is set so that it is applied in the axial direction of the tube. The seat portion 61A of the elastic means 6 is shaped like a disk and has an outer diameter that is slightly smaller and substantially the same as the inner diameter of the reduced diameter portion B2. Therefore, the seat portion 61A of the elastic means 6 is passed through the reduced diameter portion B2, and is supported so as to be surrounded from the outside in the pipe diameter direction by the reduced diameter portion B2, and is supported approximately along the pipe axis of the reduced diameter portion B2. It is held in a central position.

Through the above-described assembly, the fitting tube section 31A is fitted into the fitting tube section 22B of the branch tube section 22 so that the pipes communicate with each other internally. Specifically, as shown in FIG. 7, the fitting tube portion 31A connects the branch tube portion 22 to the fitting tube portion 22 via an intermediate passage B5 formed to penetrate through the center of the shaft portion 61B of the elastic means 6. It is fitted so as to communicate with the pipe line of the joint pipe portion 22B. Then, by fitting the fitting tube portion 31A into the tube of the fitting tube portion 22B of the branch tube portion 22, the O-ring R attached to the outer circumferential portion of the fitting tube portion 31A is inserted into the tube of the branch tube portion 22. It is set in close contact with the inner circumferential surface of the reduced diameter portion B2 over the entire area in the tube circumferential direction. Further, the base end portion A5 is set to be loosely fitted into the enlarged diameter portion B3.

Thereby, the fitting tube part 31A is fitted to the fitting tube part 22B of the branch pipe part 22 so that the arrangement in the tube axis direction overlaps, and the fitting tube part 31A is watertight with the O-ring R, and the proximal end part A5 The connection is made so that the shaft is less likely to tilt due to the loose fit. As shown in FIG. 8, in the fitting tube section 31A, a stepped surface 31C of the main body tube section 31 that protrudes like a flange from the base end (left end in the figure) of the base end section A5 is located at the open end of the branch tube section 22. It can be inserted into the fitting tube section 22B of the branch tube section 22 until it comes into contact with the fitting tube section 22A.

By inserting the fitting tube part 31A to the above position, the escape groove A1 of the fitting tube part 31A is in a state where the arrangement in the tube axis direction overlaps with each screw hole B1 of the branch tube part 22, and each screw hole B1 and the tube They are in a state where they face each other in the radial direction. Therefore, from this state, by tightening each screw B in each screw hole B1, each screw B is tightened to the position where it enters the relief groove A1, and the fitting pipe part 31A of the pipe joint 3 is connected to the fitting pipe of the branch pipe part 22. It can be assembled to the portion 22B in a state where it is prevented from coming off.

As shown in FIG. 7, the assembled fitting tube portion 31A is pushed to the left in the figure by the spring biasing force of the elastic means 6 so that the two corresponding keyways A2 are fitted into each screw B. Also, the relief groove A1 can only be moved to a position where it fits within the pipe of the branch pipe section 22. Therefore, the relief groove A1 is not exposed to the outside, and foreign matter such as dust is prevented from entering the relief groove A1 and causing malfunction.

(Elastic means 6)
As shown in FIGS. 2 and 3, the elastic means 6 includes a support member 61 serving as a seat component, and a compression coil spring 62 assembled to the support member 61. The support member 61 integrally includes a disk-shaped seat portion 61A facing in the tube axis direction, and a shaft portion 61B extending cylindrically in the tube axis direction from the center of the seat portion 61A toward the left side in the drawing. It is said that the configuration has the following. A round hole-shaped intermediate passage B5 is formed in the shaft portion 61B and the seat portion 61A, passing through the center thereof in the tube axis direction. The compression coil spring 62 is passed through the outer periphery of the shaft portion 61B from the tip on the left side in the drawing, so that the end portion on the right side in the drawing is set in contact with the seat portion 61A.

The elastic means 6 is assembled into the fitting tube part 31A of the pipe joint 3 by the following procedure, and is inserted and set together with the fitting tube part 31A into the fitting tube part 22B of the branch pipe part 22. Ru. That is, first, the compression coil spring 62 is set by passing it through the shaft portion 61B of the support member 61 from the tip side. Next, the shaft portion 61B of the support member 61 and the compression coil spring 62 passed through the shaft portion 61B are inserted into the fitting tube portion 31A of the pipe joint 3 from the open end on the right side in the figure. As a result, as shown in FIG. 7, the inner fitting part A4, which is the inner circumferential part reduced in diameter in a step shape, is formed at a position where the shaft part 61B enters the fitting tube part 31A in the tube axis direction. It fits loosely inside.

Further, the compression coil spring 62 passed through the shaft portion 61B is set so that its left end in the drawing is in contact with the right side end surface of the inner fitting portion A4 in the drawing. Thereby, the compression coil spring 62 is set so as to be sandwiched between the right side end surface of the inner fitting part A4 in the drawing and the seat part 61A of the support member 61 in the tube axis direction.

Next, as shown in the same figure (FIG. 7), the fitting tube part 31A of the pipe joint 3, on which the elastic means 6 is assembled, is inserted into the fitting tube part 22B of the branch pipe part 22. As a result, the seat portion 61A of the support member 61 is passed into the reduced diameter portion B2 of the branch pipe portion 22 and is applied to the locking seat B4 in the pipe axial direction from the left side in the figure over the entire circumferential direction. set to the state. Then, as shown in FIG. 8, the fitting pipe part 31A of the pipe joint 3 is further pushed in until the step surface 31C contacts the open end 22A of the branch pipe part 22, and each screw B is inserted into each screw hole B1. Tighten and insert into relief groove A1.

As a result, the fitting tube portion 31A of the pipe joint 3 is assembled in such a state that a spring biasing force is constantly applied to the fitting tube portion 22B of the branch tube portion 22 to the left side in the figure via the elastic means 6. It will be done. Due to the above assembly, the fitting tube section 31A of the pipe joint 3 and the fitting tube section 22B of the branch tube section 22 are connected so that their respective pipelines communicate with each other internally via the intermediate channel B5 of the support member 61. be done. The intermediate flow path B5 passes from the center of the seat portion 61A of the support member 61 through the center of the shaft portion 61B to the middle portion (inner fitting portion A4) of the fitting tube portion 31A of the pipe joint 3 in the tube axis direction. Opens into the pipe.

With such a flow path structure, the faucet branching fitting 1 is able to prevent foreign objects from reaching the sealing surface formed by the O-ring R even if some foreign matter is mixed into the hot water flowing through the intermediate flow path B5. It is configured to be difficult to reach. Specifically, for example, hot water flowing through the intermediate flow path B5 passes through a narrow fitting gap between the inner fitting part A4 of the pipe joint 3 and the shaft part 61B, and moves toward the installation space of the compression coil spring 62 on the right side in the figure. Suppose that it flows out to

In that case, the hot water further follows a path that flows outward in the pipe radial direction through the gap between the right-hand end of the fitting pipe portion 31A of the pipe joint 3 and the seat portion 61A of the support member 61. . Furthermore, the hot water that flows out passes through the narrow fitting gap between the outer circumference of the fitting tube part 31A of the pipe joint 3 and the inner circumference of the fitting tube part 22B of the branch pipe part 22, and passes through the O ring. Follow the path that flows out toward the left side in the figure toward the sealing surface due to R. In this way, the flow path from the intermediate flow path B5 to the sealing surface formed by the O-ring R has a complicated detour structure in which it is folded twice in the tube axis direction, thereby preventing foreign matter from reaching the sealing surface formed by the O-ring R. Contamination can be appropriately suppressed.

Note that in the above explanation, the elastic means 6 is first assembled into the pipe of the fitting pipe part 31A of the pipe joint 3, and then these are assembled together into the pipe of the branch pipe part 22. It may be assembled into the pipe of the branch pipe section 22.

(How to use faucet branch fitting 1)
Next, a piping construction method for the faucet branch fitting 1 will be explained. As shown in FIG. 1, the faucet branch fitting 1 is carried to a construction site in a unitized state in which each component is assembled into one unit in advance, as described above. At this time, it is assumed that the pipe joint 3 is locked in advance at an arbitrary rotational position. Note that the pipe joint 3 may be carried to the construction site in a rotational position where the rotation is not locked.

Next, at the construction site, the water supply pipe P1 is connected to the lower open end 21A of the faucet branch fitting 1. Thereafter, the connection pipe P2 is connected to the upper open end 21B, and the connection pipe P3 is connected to the pipe joint 3 connected to the branch pipe section 22. At that time, the operator can freely change the orientation of the pipe fitting 3, which consists of an elbow, to suit the conditions at the construction site by pushing the pipe fitting 3 toward the right side in the figure and then rotating it in the desired direction. . Therefore, the work of connecting the connecting pipe P3 to the pipe joint 3 can be easily performed.

After connecting the connection pipe P3 to the pipe joint 3, the direction of the pipe joint 3 is adjusted to be suitable for the wiring route of the connection pipe P3, and the pushing force applied to the pipe joint 3 is released. Thereby, the rotation of the pipe joint 3 is locked, and the pipe joint 3 can be fixed in an orientation suitable for the wiring route of the connecting pipe P3. Note that the faucet branch fitting 1 may be configured to be piped to either a water supply route or a hot water supply route. Further, the faucet branch fitting 1 may be constructed so that the branch pipe section 22 extends from the main pipe section 21 to the right, rearward, or forward depending on the situation at the construction site. good.

To summarize the above, the faucet branch fitting 1 according to the first embodiment has the following configuration. Note that the reference numerals given in parentheses below are the reference numerals corresponding to the respective configurations shown in the above embodiments.

That is, the faucet branch fitting (1) has a main pipe part (21) forming a water passage and a branch pipe part (22) branched from the main pipe part (21). It is. The faucet branch fitting (1) includes a pipe joint (3), a relief groove (A1), and a protruding pin (B). The pipe joint (3) is fitted to the open end (22A) of the branch pipe part (22) so that the arrangement in the pipe axis direction overlaps, and the pipe joint (3) is fitted in the pipe axis direction and the pipe circumferential direction by the branch pipe part (22). Slidably supported. The relief groove (A1) is located in the inner fitting tube part (31A) of the double inner and outer fitting tube parts (31A, 22B) in which the pipe joint (3) and the branch pipe part (22) are fitted. It is formed on the outer circumferential surface of the tube so as to extend in the tube circumferential direction.

The protruding pin (B) is fixed to the outer fitting tube part (22B) and protrudes so as to enter the relief groove (A1). The relief groove (A1) has a key groove (A2) extending in the tube axis direction in a part of the tube circumferential direction. As the pipe joint (3) slides in the pipe axial direction with respect to the branch pipe part (22), the protruding pin (B) enters the keyway (A2), thereby causing the pipe joint (3) to slide against the branch pipe part (22). Sliding in the tube circumferential direction is restricted, and the protruding pin (B) comes out of the keyway (A2), thereby allowing the tube joint (3) to slide in the tube circumferential direction.

According to the above configuration, the protruding pin (B) can be moved in and out of the keyway (A2) by simply moving the pipe joint (3) in the pipe axis direction with respect to the branch pipe part (22). , the pipe fitting (3) can be switched to be rotationally locked or unlocked with respect to the branch pipe section (22). Therefore, for example, when performing construction such as connecting another connecting pipe (P3) to the pipe fitting (3), rotate the pipe joint (3) to a position where it is easy to perform the work, and then lock the pipe joint (3) rotationally after construction. You can easily switch to holding it in place with a single touch. Thereby, it is possible to improve the workability of piping construction and the position holding performance after construction.

Further, the escape groove (A1) is a groove having a U-shaped cross section that can restrict bidirectional movement of the protruding pin (B) in the tube axis direction within the range of the groove width. According to the above configuration, by utilizing the structure in which the protruding pin (B) enters the relief groove (A1), it is possible to rationally configure the retaining structure for the branch pipe part (22) of the pipe joint (3). .

Further, the key groove (A2) extends from the escape groove (A1) so that the protruding pin (B) can be inserted therein by separating the pipe joint (3) from the branch pipe part (22) in the tube axis direction. According to the above configuration, the direction in which the pipe joint (3) is separated from the branch pipe portion (22) is the direction in which the pipe joint (3) is rotationally locked. As a result, the direction in which the pipe joint (3) is rotationally locked is the same as the direction in which the pipe joint (3) receives a force such that it is pulled away from the branch pipe portion (22) by the water flow pressure. Therefore, it is possible to prevent an unexpected situation in which the rotation lock of the pipe joint (3) is unintentionally released during use.

Further, the inner fitting tube section (31A) is constituted by a pipe joint (3), and the outer fitting tube section (22B) is constituted by a branch tube section (22). According to the above configuration, the relief groove (A1) is formed in the pipe joint (3) that constitutes the inner fitting tube portion (31A). Therefore, even if the branch pipe part (22) is made of a cast metal integrally formed with the main pipe part (21), which makes it difficult to perform complicated machining, each component can be machined relatively easily. can.

Further, key grooves (A2) are formed at a plurality of locations in the circumferential direction of the relief groove (A1). According to the above configuration, the pipe joint (3) can be selectively rotationally locked at a plurality of rotational positions, thereby further improving convenience.

Further, combinations of the protruding pin (B) and the keyway (A2) into which the protruding pin (B) is inserted are set at a plurality of locations in the pipe circumferential direction. According to the above configuration, the strength of the rotation lock of the pipe joint (3) can be increased. Moreover, inclination of the pipe joint (3) with respect to the branch pipe part (22) can be suppressed.

Moreover, the faucet branch fitting (1) further includes an elastic means (6) provided between the branch pipe part (22) and the pipe joint (3). The elastic means (6) is configured to elastically force the protruding pin (B) into the key groove (A2) when the protruding pin (B) and the key groove (A2) are aligned in the tube circumferential direction. Apply force. According to the above configuration, by turning the pipe joint (3) to the desired position to lock the rotation and releasing the hand, the rotation can be automatically locked by the elastic force. Furthermore, the elastic force of the elastic means (6) allows the pipe joint (3) to be appropriately held in a rotationally locked state.

In addition, the elastic means (6) is assembled to the seat part (61A) so as to be fixed in position inside the outer fitting tube part (22B), and the fitting tube part (31A) inside from the seat part (61A). a support member (61) having a shaft (61B) extending in the tube axis direction toward the inside of the support member (61); and a compression coil spring (62) that applies a repulsive force in the tube axis direction between the tubes. According to the above configuration, the elastic means (6) can be incorporated into the outer fitting pipe portion (22B) so as not to spoil the appearance of the faucet branch fitting (1). can.

Further, the shaft portion (61B) extends in the tube axis direction to the inside of the inner fitting tube portion (31A), and penetrates the center portion of the shaft portion (61B) in the tube axis direction to connect to the outer fitting tube portion (31A). An intermediate flow path (B5) is formed as a flow path between the tube portion (22B) and the inner fitting tube portion (31A). According to the above configuration, the shaft portion (61B) including the intermediate flow path (B5) moves from the inside of the outer fitting tube portion (22B) to the inner fitting tube portion (22B) and the inner fitting tube portion (22B). By complicating the flow path to the sealing surface with 31A), it is possible to prevent foreign matter from entering the sealing surface.

Specifically, the flow path to the sealing surface passes through the intermediate flow path (B5) of the shaft portion (61B) and then wraps around between the shaft portion (61B) and the inner fitting tube portion (31A). , it is formed as a detour that passes between these and further wraps around between the inner fitting tube section (31A) and the outer fitting tube section (22B).

In addition, the relief groove (A1) including the keyway (A2) extends from the outer fitting pipe part (22B) to the pipe joint (3) in the entire movable range in the pipe axis direction with respect to the branch pipe part (22). It is formed in a position that does not protrude in the axial direction. According to the above configuration, even if the pipe joint (3) is moved in the tube axis direction with respect to the branch pipe portion (22), the key groove (A2) and the relief groove (A1) are not exposed to the outside. Therefore, it is possible to suppress the occurrence of malfunctions due to foreign matter such as dust entering the escape groove (A1).

In addition, the faucet branch fitting (1) is integrated into a branch pipe part (22) with a pipe joint (3) as a rotary elbow, and the main pipe part (21) is installed inside a cabinet provided below the sink. extends in the height direction, and the branch pipe portion (22) is configured as a branch stopcock disposed so as to extend in a direction crossing the height direction.

According to the above configuration, piping construction can be easily performed in a narrow space under the sink by freely changing the direction of the pipe joint (3) to suit the situation at the construction site without using any tools. Moreover, after construction, the pipe joint (3) can be maintained in a state where it does not rotate even if it interferes with other pipes. Therefore, the connecting pipe (P3) connected to the pipe joint (3) can be appropriately fixed in position in the narrow space under the sink where interference with other pipes is likely to occur.

《Other embodiments》
Although the embodiment of the present invention has been described above using one embodiment, the present invention can be implemented in various forms shown below in addition to the above embodiment.

1. The faucet branch fitting of the present invention may be installed in a space under a sink in a kitchen, a space under a vanity, a bathroom, or other spaces. In addition to the so-called straight-type branch stop valve that connects to pipes coming from under the floor, there are also so-called angle-type branch stop valves that connect to pipes coming from the wall and supply water by changing the direction. It may also be configured as a faucet. Further, the faucet branch fitting may be configured as a simple branch pipe without a water stop function.

2. In addition to an elbow, the pipe joint may be a socket that straightly connects the branch pipe section to another connecting pipe. Further, the pipe joint may be a so-called cheese (T-shaped pipe) that further branches a flow path branched from a branch pipe section.

3. A pipe joint and a branch pipe part are two pipe parts that are fitted into each other, the outer fitting pipe part being a pipe joint, and the inner fitting pipe part being a branch pipe part. It may be something that is done. In that case, the relief groove is formed in the branch pipe part which is the inner fitting pipe part, and the protruding pin is fixed to the pipe joint which is the outer fitting pipe part and is provided so as to protrude and enter into the relief groove. becomes.

4. The relief groove may be of any shape as long as it extends in the circumferential direction of the pipe to allow rotational movement of the pipe joint. Only one portion may extend in an arc shape (with an end). The keyways are formed corresponding to the rotational lock positions of the pipe joint, and by increasing the number of keyways, it becomes possible to lock the pipe joint at a plurality of rotational positions.

Therefore, the number of key grooves may be formed at only one location in the tube circumferential direction for one protruding pin that enters the key groove, or a plurality of key grooves may be formed in the tube circumferential direction. When a plurality of key grooves are formed in the tube circumferential direction for one protruding pin, the pitch of the arrangement does not need to be constant, and the key grooves may be formed at positions corresponding to the rotation lock position of the pipe joint. Further, the key grooves may be formed in a shape such as a so-called spline groove in which they are continuously arranged in the tube circumferential direction. The keyway may be configured to extend out from the relief groove so that the protruding pin enters from the relief groove when the tube joint is pushed into the branch pipe section and moved in the tube axis direction.

The protruding pin that enters the keyway may be a screw that is tightened and fixed to the outer fitting tube, or a press-fit pin that is press-fitted and fixed to the outer fitting tube. Further, the projecting pin may be a plunger that is embedded in the outer fitting tube portion and allows the ball or pin at the tip to escape and enter the groove using a spring force. The protruding pin may be provided only at one location in the circumferential direction of the tube, or may be provided at multiple locations in the circumferential direction of the tube. When a plurality of protruding pins are provided in the tube circumferential direction, the arrangement pitch does not need to be constant, and the arrangement in the tube circumferential direction is not particularly limited.

5. In the embodiment described above, the escape groove is a groove with a U-shaped cross section that can restrict bidirectional movement of the protruding pin in the tube axis direction within the range of the groove width, and the relief groove is a groove that has a U-shaped cross section that can restrict the bidirectional movement of the protruding pin in the tube axis direction. It was designed to also serve as a stop. However, the relief groove may be a groove having an L-shaped cross section with one side open in the tube axis direction, and may not be configured to prevent the branch pipe portion of the pipe joint from coming off in the tube axis direction. That is, the prevention of the branch pipe part of the pipe joint from coming off in the pipe axial direction may be performed at another part.

6. The faucet branch fitting does not include an elastic means, that is, an elastic means provided between the branch pipe portion and the pipe joint to apply a spring biasing force to cause the protruding pin to enter the keyway. Also good. For example, instead of using elastic means, the protruding pin is held in the position where it enters the keyway and the position where it is pulled out of the keyway and into the relief groove by the sliding frictional resistance between the branch pipe section and the pipe joint. It is also possible to have a possible configuration. As the elastic means, in addition to a biasing structure using a spring other than a compression coil spring such as a tension spring, a biasing structure using an elastic body other than a spring such as rubber can be applied.

7. The relief groove and/or the keyway may be formed at a position protruding from the outer fitting tube portion in the tube axis direction in the movable range of the tube joint in the tube axis direction with respect to the branch tube portion. Further, the elastic means may be configured to be exposed to the outside, such as a tension spring or a compression spring that is hooked between the pipe joint and the branch pipe portion in a form that is exposed outside the pipe.

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the description of the embodiments described above, and it is intended that all changes within the meaning and scope equivalent to the claims are included.

DESCRIPTION OF SYMBOLS 1... Branch fitting for faucet, 2... Fitting main body, 3... Pipe joint, 4... Upper handle, 5... Lower handle, 6... Elastic means, 21... Main pipe part, 21A... Open end part, 21B... Open end part, 22... Branch pipe part, 22A... Open end part, 22B... Fitting pipe part (outer fitting pipe part), B1... Screw hole, B2... Reduced diameter part, B3... Expanded diameter part, B4... Locking seat, 31...Main body tube part, 31A...Fitting tube part (inner fitting tube part), A1...Escape groove, A2...Keyway, A3...Annular groove, A4...Inner fitting part, A5...Proximal end part, 31B ...Connection port, 31C...Step surface, 32...Connection pipe section, R...O ring, B...screw (protruding pin), P1...Water supply pipe, P2...Connection pipe, P3...Connection pipe, 61...Support member, 61A... Seat part, 61B...shaft part, B5...middle flow path, 62...compression coil spring

Claims (11)

A branching fitting for a faucet, comprising a main pipe part forming a water passage and a branch pipe part branching from the main pipe part,
a pipe joint that is fitted into the open end of the branch pipe section so that the arrangement in the pipe axial direction overlaps, and is supported by the branch pipe part so as to be slidable in the pipe axial direction and the pipe circumferential direction;
a relief groove extending in the pipe circumferential direction on the outer circumferential surface of the inner fitting pipe part of the dual inner and outer fitting pipe parts fitted to the pipe joint and the branch pipe part;
a protruding pin fixed to the outer fitting tube portion and protruding so as to enter the relief groove;
The relief groove has a key groove extending in the tube axis direction in a part of the tube circumferential direction, and as the tube joint slides in the tube axis direction with respect to the branch pipe section, the protruding pin When the protruding pin enters the keyway, sliding movement of the pipe joint in the pipe circumferential direction with respect to the branch pipe section is restricted, and when the protruding pin comes out of the keyway, sliding movement of the pipe joint in the pipe circumferential direction is permitted. Branch fittings for faucets. The faucet branch fitting according to claim 1,
The branch fitting for a faucet, wherein the relief groove is a groove having a U-shaped cross section that can restrict bidirectional movement of the protruding pin in the tube axis direction within a range of groove width. The faucet branch fitting according to claim 1 or 2,
A branch fitting for a faucet, in which the key groove extends from the escape groove so that the protruding pin is inserted therein due to the spacing in the tube axis direction from the branch pipe portion of the pipe joint. The faucet branch fitting according to any one of claims 1 to 3,
The branch fitting for a faucet, wherein the inner fitting pipe portion is constituted by the pipe joint, and the outer fitting pipe portion is constituted by the branch pipe portion. The faucet branch fitting according to any one of claims 1 to 4,
A branch fitting for a faucet, wherein the key groove is formed at a plurality of locations in the pipe circumferential direction of the relief groove. The faucet branch fitting according to any one of claims 1 to 5,
A branch fitting for a faucet, in which combinations of the protruding pin and the keyway into which the protruding pin is inserted are set at a plurality of locations in the circumferential direction of the pipe. The faucet branch fitting according to any one of claims 1 to 6,
The projecting pin is provided between the branch pipe portion and the pipe joint, and when the projecting pin and the key groove are aligned in the circumferential direction of the tube, the projecting pin is biased into the key groove. A branch fitting for a faucet, further comprising an elastic means for applying force. The faucet branch fitting according to claim 7,
A seat part assembled so that the elastic means is fixed in position inside the outer fitting tube part, and a shaft part extending in the tube axis direction from the seat part toward the inside of the inner fitting tube part. and a compression coil spring that is passed through the shaft portion and applies a repulsive force in the tube axis direction between the seat portion and the inner fitting tube portion. Branch fittings for use. The faucet branch fitting according to claim 8,
The shaft portion extends in the tube axis direction to the inside of the inner fitting tube portion, and penetrates through the center of the shaft portion in the tube axis direction to connect the outer fitting tube portion and the inner side. A branch fitting for a faucet in which an intermediate flow path forming a flow path between the fitting pipe portion and the fitting pipe portion of the faucet is formed. The faucet branch fitting according to any one of claims 1 to 9,
The escape groove including the keyway is formed at a position where it does not protrude from the outer fitting pipe part in the pipe axis direction throughout the movable range of the pipe joint in the pipe axis direction with respect to the branch pipe part. Branch fittings for faucets. The faucet branch fitting according to any one of claims 1 to 10,
In the faucet branch fitting, the pipe fitting is integrated into the branch pipe part as a rotary elbow, and the main pipe part extends in the height direction inside a cabinet provided below the sink, and the branch pipe part is connected to the branch pipe part. A branch metal fitting for a faucet configured as a branch stop faucet disposed so that a portion thereof extends in a direction intersecting the height direction.

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