JP2006118118A - Pipe joint for connection of combination faucet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint for connection of a combination faucet, which is excellent in constructibility, and which can keep manufacturing costs low by virtue of the simplicity of a structure. <P>SOLUTION: This pipe joint 1 for the connection of the combination faucet is equipped with: a first horizontal cylindrical pipe joint member 2 where a piping connection port part 21 is provided on a back end side; and a second pipe joint member 3 which comprises a rotary cylinder part 31 covering the member 2 in the state of being rotatably and longitudinally movably fitted into the member 2 from the side of its front end, a hollow arm part 32 elongated in a radial direction from a front end of the cylinder part 31, and a combination faucet connection port part 33 provided at the leading end of the arm part 32 in the state of protruding forward. An engaging protrusion 34 is formed on the inner peripheral surface of the cylinder part 31. An annular groove 22 for housing the engaging protrusion 34 is formed in the outer peripheral surface of the member 2. An engaging recess 23, which is engaged with the engaging protrusion 34 by moving the cylinder part 31 backward, is formed on the back side surface of the annular groove 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is used to connect a mixing faucet to each end of a hot water supply pipe and a water supply pipe arranged on the back side of a wall, etc., and is generally called a “crank” for connecting a mixing faucet It relates to pipe joints.

  This type of pipe joint generally has a pipe connection port with an external thread provided at the rear end of the integrally formed crank tube, and a mixing faucet connection at the front end. Are known.

  When connecting a mixing faucet using this integrated pipe joint, first wrap a seal tape around the male screw at the rear end of the pipe joint, and then attach the male screw to each end of the hot water supply pipe and water supply pipe. It is necessary to screw into the provided female screw.

  However, when the screwing operation of the male screw is completed, it is rare that the mixing faucet connection port is in a position suitable for connecting the mixing faucet. It was necessary to repeat the screwing operation several times until the required position was reached, which was very time-consuming.

  Therefore, as a means for solving the above problems, the present applicant has previously proposed the following mixed water faucet connecting pipe joint. That is, this pipe joint is a horizontal cylindrical first pipe in which the front end opening is closed, a hot water supply pipe with a male screw or a water supply pipe connection port is provided on the rear end side, and a hot water or water outlet hole is formed in the peripheral wall. A joint member, a pivot tube part fitted over the first pipe joint member so as to be pivotable and movably back and forth so as to cover the hot water or water outlet hole, hot water or water opened in the peripheral wall of the pivot cylinder part A second pipe joint member comprising an outwardly projecting cylindrical portion provided in an outwardly projecting manner at the outer peripheral edge of the passage hole, and a mixing faucet connection port portion extending forwardly leading to the distal end side of the outwardly projecting cylindrical portion; It is equipped with. At least one of the outer peripheral surface of the first pipe joint member and the inner peripheral surface of the rotary cylinder part so as to communicate the hot water or water outlet hole of the first pipe joint member and the hot water or water passage hole of the rotary cylinder part. Is provided with an annular communication groove. While the rotating cylinder part is fitted to the inner peripheral surface of the rotating cylinder part and the outer peripheral surface of the first pipe joint member, the rotating cylinder part can be fitted to each other to prevent the rotating cylinder part from rotating. There is provided a fitting portion that shifts forward and backward when the rotating cylinder portion is moved forward and allows the rotation of the rotating cylinder portion (see Patent Document 1 below).

  When connecting a mixing faucet to each end of a hot water supply pipe and a water supply pipe with the above-mentioned pipe joint, (1) First, the rotary cylinder part is moved backward to fit the rotary cylinder part and the first pipe joint member After the parts are fitted together, after sealing tape is wound around the male screw of the first pipe joint member, the male screw is held by the second pipe joint member and the female screw at each end of the hot water supply pipe and the water supply pipe (2) Next, the rotating cylinder portion of the pipe joint is moved forward to remove the fitting portions, and the mixing faucet connection port is in a position suitable for connecting the mixing faucet. (3) Finally, the mixing faucet connection port may be connected to the hot water or water inlet of the mixing faucet body. Therefore, according to the above-mentioned mixed faucet connection pipe joint, it is not necessary to redo the male screw, and it is possible to connect the mixed faucet to the hot water supply pipe and the water supply pipe very easily and reliably. It is.

However, in the case of the above-described pipe joint, the structure is slightly complicated, so that the manufacturing cost is increased accordingly.
JP 2003-147817 A

  An object of the present invention is to provide a pipe joint for connecting a mixed water faucet that is excellent in workability, has a simple structure, and can reduce manufacturing costs.

  The mixed water faucet connecting pipe joint according to the present invention has a horizontal cylindrical first pipe joint member having a male threaded pipe connection port on the rear end side, and is rotatable from the front end side to the first pipe joint member. And a rotating cylinder part fitted in such a manner that it can be moved back and forth, a hollow arm part extending in the radial direction from the front end of the rotating cylinder part, and a mixing faucet connection port provided in a forward projecting manner at the tip of the arm part A first pipe having a plurality of engaging projections formed on the inner peripheral surface of the rotating tube portion of the second pipe joint member at intervals in the circumferential direction. An annular groove that accommodates the engaging protrusion is formed on the outer peripheral surface of the joint member, and an engaging recess that is engaged with the engaging protrusion by moving the rotating cylinder portion rearward is provided on the rear side of the annular groove. One or a plurality are formed at intervals in the circumferential direction.

According to said pipe joint, a mixing faucet can be connected to each terminal of a hot water supply pipe and a water supply pipe as follows, for example. That is, first, the rotating cylinder part of the second pipe joint member is moved rearward, and the engagement convex part is engaged with the engagement concave part of the first pipe joint member. By this operation, the rotation cylinder part of the second pipe joint member is made unrotatable with respect to the first pipe joint member. Moreover, a sealing tape is wound around the male screw of the pipe connection port of the first pipe joint member.
In this state, the second pipe joint member is held by hand and turned in the required direction, whereby the male screw at the pipe connection port of the first pipe joint member is screwed into the female screw at each end of the hot water supply pipe and the water supply pipe.
When the screwing operation is completed, the rotating cylinder portion is moved forward. As a result, the engaging convex portion is disengaged from the engaging concave portion and is positioned in the annular groove, and the rotating cylinder portion is rotatable with respect to the first pipe joint member.
Then, the rotation tube part is rotated by a required angle so that the mixing faucet connection port is at a position suitable for connecting the mixing faucet, and the mixing faucet connection port is connected to the hot water of the mixing faucet body or Connect to the water inlet. In this way, the connection work of the mixing faucet is completed.

  As described above, according to the mixed water faucet connecting pipe joint of the present invention, the operation of connecting the mixed water faucet to the hot water supply pipe and the water supply pipe can be performed very easily and reliably.

  In addition, the mixed water faucet connection pipe joint of the present invention has a simpler structure than the prior art (Patent Document 1) because the structures of the first pipe joint member and the second pipe joint member constituting the same are manufactured. Can be suppressed.

  In the mixed water faucet connecting pipe joint according to the present invention, it is preferable that the engaging convex part is constituted by a tip part of a screw screwed into a screw hole formed in the rotating cylinder part of the second pipe joint member. .

  According to the said structure, manufacture of a 2nd pipe joint member is easy, and the assembly | attachment to a 1st pipe joint member can also be performed easily.

  In the mixed water faucet connecting pipe joint according to the present invention, it is preferable that one engaging convex portion is formed and four engaging concave portions are formed at equal intervals in the circumferential direction.

When performing an operation of engaging the engaging convex portion of the rotating cylinder portion with the engaging concave portion of the first pipe joint member, it is usually necessary to move the rotating cylindrical portion backward while rotating the engaging concave portion. If four are formed at equal intervals in the circumferential direction, the amount of rotation of the rotating cylinder portion can be reduced, and the above operation can be performed more smoothly and quickly. Of course, the number of engaging recesses may be less than 4 as long as it does not become smaller than the number of engaging projections, but in that case, the above-described effects cannot be sufficiently obtained. On the other hand, although it is possible to increase the number of engaging recesses to more than four, the labor for processing the second pipe joint member increases and the operation becomes difficult.
About one engagement convex part, it is enough if one is formed, and it can suppress an extra cost by it. However, it is also possible to form two to four engaging projections at intervals in the circumferential direction. In this case, since the external force applied during the screwing operation is dispersed by increasing the number of the engaging convex portions, the possibility of deformation or breakage is reduced.

Embodiments of the present invention are described below with reference to FIGS.
In FIG. 1, a mixed water faucet connecting pipe joint (1) according to the present invention is attached to each end of a hot water supply pipe (not shown) and a water supply pipe (not shown) arranged vertically on the back side of a wall (W) of a bathroom or the like. A mixing faucet (V) is connected via Although detailed illustration is omitted, at each end of the hot water supply pipe and the water supply pipe, a female screw opening forward is formed, and these female screws are connected to the wall (W through a hole formed in the wall (W). ) Is exposed on the front side. The mixing faucet (V) in FIG. 1 is of a single lever type, and has a male threaded hot water inlet (not shown) and a male threaded water inlet projecting backward on the rear surface of the faucet body (V1). Mouth portions (not shown) are provided side by side.

  As shown in FIGS. 2 to 4, the mixed water faucet connection pipe joint (1) includes a first pipe joint member (2) and a second pipe joint member (3).

  The first pipe joint member (2) has a horizontal cylindrical shape in which a pipe connection port portion (21) with a male screw (21a) is provided on the rear end side. This member (2) is preferably formed by subjecting a bar made of a metal such as a copper alloy to a required cutting process in order to reduce manufacturing costs.

  The second pipe joint member (3) includes a rotary cylinder part (31) and a rotary cylinder part (31) fitted to the first pipe joint member (2) so as to be rotatable from the front end side and movably back and forth. ) In the radial direction from the front end, and a water faucet connection port portion (33) provided in a forward projecting manner at the tip of the arm portion (32). In this embodiment, the rotating cylinder part (31) has such a length as to cover substantially the front half of the first pipe joint member (2).

  One engagement convex part (34) is formed in the internal peripheral surface of the rotation cylinder part (31) of a 2nd pipe joint member (3). The engaging convex part (34) is constituted by a tip part of a screw (4) screwed into a screw hole (311) opened in the rotating cylinder part (31) of the second pipe joint member (3). . As the screw (4), as shown in FIG. 2 to FIG. 4, a screw whose tip is not cut is preferably used. In this embodiment, the engaging projection (34) is formed at the rear end of the rotating cylinder (31).

  On the other hand, an annular groove (22) that accommodates the engaging protrusion (34) is formed on the outer peripheral surface of the first pipe joint member (2), and a rotating cylinder is formed on the rear side surface of the annular groove (22). Four engagement recesses (23) that are engaged with the engagement protrusions (34) by moving the part (31) rearward are formed at equal intervals in the circumferential direction. In this embodiment, the annular groove (22) and the engaging recess (23) are formed in a portion slightly closer to the front end than the center of the length of the first pipe joint member (2).

  The pipe connection port portion (21) with the male thread (21a) of the first pipe joint member (2) has a length that occupies almost the rear half of the member (2). An annular cover (5) for covering a hole formed in the wall (W) is fitted to the pipe connection port portion (21).

  On the outer peripheral surface on the front end side of the first pipe joint member (2) and on the inner peripheral surface of the rotating cylinder part (31) of the second pipe joint member (3), there are engaging projections at intermediate positions of these lengths. An annular step (24) (312) is formed which contacts with each other when the (34) is engaged with the engaging recess (23) and restricts the rearward movement of the rotary cylinder (31). Due to the presence of these annular steps (24) and (312), when the male screw (21a) is screwed into the end of the pipe such as a hot water supply pipe described later, the engaging projection (34), that is, the screw (4 ) Can be effectively prevented from being deformed or damaged by applying an excessive load to the tip (41).

  On the front end side of the first joint member (2), the rear portion of the annular step (24) is thicker than the other portions, and the annular groove (22) and the engagement recess (23) are formed here. Is formed.

  The depth of the annular groove (22) is made slightly larger than the protruding length of the engaging projection (34). The width of the annular groove (22) is such that the engaging convex portion (34) is allowed to move in the circumferential direction as the rotating cylindrical portion (31) rotates. What is necessary is just to make it slightly larger than an outer diameter. Further, by further widening the width of the annular groove (22), it is possible to finely adjust the front / rear position of the rotating cylinder part (31) and absorb the front / rear shift of the ends of the water supply pipe and the hot water supply pipe. Is also possible.

  The shape and size of the engaging recess (23) are not particularly limited as long as the engaging recess (23) is engaged with the engaging protrusion (34) and can prevent the rotation of the rotating cylinder (31). In this embodiment, the depth and width of each engagement recess (23) are slightly larger than the outer diameter of the engagement projection (34). Moreover, in this embodiment, each engagement recessed part (23) is formed by the drill process to the metal bar which comprises the 1st pipe joint member (2), The front-end | tip part is made into circular arc shape. (See FIG. 2).

  On the outer peripheral surface of the front end portion of the first joint member (2), two front and rear packing receiving grooves are formed at predetermined intervals, and a packing (6) made of an O-ring is fitted into these grooves to form the first pipe. Watertightness between the outer peripheral surface of the joint member (2) and the inner peripheral surface of the rotating cylinder portion (31) is maintained. Further, the rotation due to the weight of the second pipe joint member (3) is prevented by the frictional resistance between the packing (6) and the inner peripheral surface of the rotating cylinder portion (31).

  The rotating tube portion (31) and the arm portion (32) of the second pipe joint member (3) are integrally formed by an L-shaped main body (301) made of a metal material such as bronze casting. A screw hole (301a) opened forward is formed at the tip of the L-shaped body (301), that is, the tip of the arm (32).

  The mixing faucet connection port (33) includes a cylindrical nut holding member (302) having a male screw (302a) screwed into a screw hole (321) of the L-shaped main body (301) at the rear end, and a nut holding member (302) and a fixing nut (303) which is rotatably held by the water faucet body (V1) and is screwed into the male threaded water inlet and the male threaded water inlet. The fixing nut (303) has an inward flange portion (303a) formed at the rear end portion thereof, an outward flange portion (302b) formed at the front end portion of the nut holding member (302) and an L-shaped main body (301). ) It can be rotated by being loosely sandwiched between the peripheral edge of the screw hole (301a) on the outer surface. The space between the front end face of the nut holding member (302) and the rear end face of the hot water or water inlet is sealed by, for example, a nitrile rubber packing (7).

  Note that the hot water inlet port and the inlet port of the faucet body (V1) may be provided with a fixing nut rotatably at each rear end thereof. In this case, instead of the nut holding member (302) and the fixing nut (303), the mixing faucet connection port portion is, for example, a first screwed into a screw hole (301a) of the L-shaped main body (301). It is also possible to have a male screw member having a male screw at the rear end and having a second male screw at the front end to be screwed into the hot water inlet and the fixing nut at each rear end of the inlet. . Further, in this case, a mixing faucet connection port portion having a male screw portion protruding forward and screwed into a fixing nut at each rear end of the introduction port portion at the front end portion of the L-shaped main body (301) May be formed integrally.

  When the pipe joint (1) is assembled by the first pipe joint member (2) and the second pipe joint member (3) described above, the screw hole (311 of the rotating cylinder portion (31) in the second pipe joint member (3) is provided. ), Remove the screw (4) from the front end of the first pipe joint member (2), and then place the screw (4) in the screw hole (311). The tip (41) may be screwed so that the tip (41) is disposed in the annular groove (22).

  Next, a method for connecting the mixed water tap (V) to the hot water supply pipe and the end of the water supply pipe using the pipe joint (1) will be described. First, the rotating cylinder part (31) of the second pipe joint member (3) in the pipe joint (1) is moved backward while rotating, and the engaging convex part (34) of the rotating cylinder part (31) is moved. Is engaged with one of the engaging recesses (23) of the first pipe joint member (2) (see FIG. 4). Further, a seal tape (not shown) is wound around the pipe connection port portion (21) with the male thread (21a) of the first pipe joint member (2).

  Next, holding the second pipe joint member (3) by hand, the pipe connection port (21) in the first pipe joint member (2) is screwed into the end of the hot water supply pipe or water supply pipe.

  When the screwing operation of the pipe connection port portion (21) is completed, the engagement convex portion (34) is removed from the engagement concave portion (23) by pulling the rotating cylinder portion (31) forward, and the annular groove (22). (See FIG. 3). After that, turn the rotating cylinder (31) at a required angle so that the mixing faucet connection port (33) comes to a position suitable for connecting the mixing faucet (V) (see FIG. 1). Move.

  Then, the fixing nut (303) of the mixing faucet connection port (33) is screwed into the male screw of the hot water or water introduction port in the faucet body (V1) of the mixing faucet (V), and both are attached. Connecting.

  In this way, when the pipe joint (1) is used, it is not necessary to redo the screwing operation of the pipe connection port (21) until the mixed water plug connection port (33) comes to a required position. ) Can be connected very easily and reliably.

  In the case of the pipe joint (1), the structure of the first pipe joint member (2) and the second pipe joint member (3) constituting the pipe joint (1) is simplified as compared with the prior art described in Patent Document 1. Therefore, the manufacturing cost can be reduced by that amount, and it can be provided at a low cost.

  The above-described embodiments are merely examples, and it is needless to say that the present invention can be implemented with appropriate modifications without departing from the spirit of the present invention described in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention, and is a perspective view illustrating a state in which a mixing faucet is connected to a hot water supply pipe and a water supply pipe by a mixed faucet connection pipe joint. It is a disassembled perspective view of the pipe joint for mixing faucets connection. A pipe joint for connecting a mixed water faucet in a state in which the engaging convex part of the second pipe joint member is disengaged from the engaging concave part of the first pipe joint member and the rotating cylinder part of the second pipe joint member is made rotatable. (A) is a longitudinal cross-sectional view, (b) is a cross-sectional view along the 3b-3b line of (a). The mixed water faucet connecting pipe joint in a state in which the engaging convex part of the second joint member is engaged with the engaging concave part of the first joint member, and the rotating cylinder part of the second pipe joint member is made unrotatable. (A) is a longitudinal cross-sectional view, (b) is a transverse cross-sectional view along the 4b-4b line of (a).

Explanation of symbols

(1): Tube fitting for mixed faucet connection
(2): 1st pipe joint member
(21): Piping connection port
(21a): Male thread
(22): Annular groove
(23): Engaging recess
(3): Second pipe joint member
(31): Rotating cylinder
(311): Screw hole
(32): Arm
(33): Mixer faucet connection port
(34): Engaging projection
(4): Screw
(41): Tip

Claims (3)

A horizontal tubular first pipe joint member (2) having a pipe connection port (21) with a male screw (21a) on the rear end side;
A rotating cylinder part (31) fitted on the first pipe joint member (2) so as to be rotatable from the front end side and movable back and forth, and a hollow extending in the radial direction from the front end of the rotating cylinder part (31) And a second pipe joint member (3) comprising a mixing faucet connection port portion (33) provided in a forward projecting shape at the tip of the arm portion (32),
One or more engaging projections (34) are formed on the inner peripheral surface of the rotating tube portion (31) of the second pipe joint member (3) at intervals in the circumferential direction,
On the outer peripheral surface of the first pipe joint member (2), an annular groove (22) for accommodating the engaging convex portion (34) is formed,
On the rear surface of the annular groove (22), there is one engagement recess (23) that is engaged with the engagement protrusion (34) by moving the rotating cylinder portion (31) rearward, or spaced in the circumferential direction. A pipe joint for connecting a mixed water faucet, wherein a plurality of pipe joints are formed.   The engaging protrusion (34) is constituted by the tip (41) of the screw (4) screwed into the screw hole (311) drilled in the rotating cylinder (31) of the second pipe joint member (3). The pipe joint for connecting a mixed water faucet according to claim 1, wherein the pipe joint is connected.   The mixed faucet connection according to claim 1 or 2, wherein one engaging convex part (34) is formed and four engaging concave parts (23) are formed at equal intervals in the circumferential direction. Pipe fittings.

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