JP3023896U - Rotating male thread adapter for piping - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the number of parts and improve the sealing function in a rotary male screw adapter for pipe connection. An external thread portion 2a is formed on an outer peripheral surface of an adapter main body 2 formed of one member. The inner peripheral surface of the adapter body 2 is provided with recesses 2c and 2e, and grooves 2d and 2f, respectively. The connecting pipe 3 has an enlarged diameter portion 3a and an outward flange portion 3b, and is provided with recesses 2c, 2
It is engaged with the side wall of e. The snap ring 4 is installed in the groove 2f. Further, an O-ring 5 for sealing made of an elastic member or the like is fitted in the groove 2d.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a rotary male screw adapter for connecting pipes.

[0002]

[Prior art]

 Conventionally, various types of pipe joints have been devised. An example thereof is disclosed in Japanese Utility Model Publication No. 7-12691. The piping joint described in this publication will be described below. FIG. 5 is a partial cross-sectional side view showing the structure of the rotary connection fitting part in the joint for piping disclosed in Japanese Utility Model Laid-Open No. 7-12691.

With reference to FIG. 5, the connecting fitting 11 has a water blocking member 18 and a rotating member 19. The water blocking member 18 has a cylindrical shape, is fitted onto the straight pipe portion 12 of the flexible tube 20, and has an annular groove 22 for fitting the water blocking packing 21 on the inner peripheral surface thereof. Further, a concave groove 23 for fixing the end portion of the blade 24 is formed on the outer peripheral surface of the water blocking member 18. A press cover 25 is fitted on the water blocking member 18. The press cover 25 is fitted to the enlarged diameter portion 15 of the flexible tube 20 and the outer peripheral surface of the water blocking member 18 so as to press the blade 24 into pressure contact.

The rotating member 19 is formed in a cylindrical shape and has a large diameter portion 27 and a screw portion 28. The large diameter portion 27 is rotatably fitted to the outer end portion of the water blocking member 18. Therefore, the interface 26 exists between the large diameter portion 27 and the water blocking member 18. An annular groove 29 is formed on the outer peripheral surface of the outer end portion of the water blocking member 18, and an O ring 30 is fitted into the annular groove 29. This O-ring 30 makes it possible to prevent the fluid from leaking from the interface 26 between the water blocking member 18 and the rotating member 19.

An outer flange 14 is formed at the outer end of the straight pipe portion 12, and a water-stopping expanded portion 17 is also formed at a position corresponding to the annular groove 22. The water stopping expanded diameter portion 17 has a function of preventing fluid leakage from the interface 31 between the straight pipe portion 12 and the water stopping member 18. Further, in FIG. 5, 13 indicates the bellows portion of the flexible tube 20.

As described above, by dividing the connection fitting 11 into the water blocking member 18 and the rotating member 19, the rotating member 19 slides on the outer peripheral surface of the water blocking member 18. In this case, the roundness of the outer peripheral surface of the water blocking member 18 can be increased, and the rotating torque of the rotating member 19 can be kept constant.

[0007]

[Problems to be solved by the device]

 However, the above-mentioned connecting fitting 11 has the following problems. As described above, the connecting fitting 11 is divided into the rotating member 19 and the water blocking member 18. Therefore, the interface 26 exists between the rotating member 19 and the water blocking member 18, and the interface 31 exists between the water blocking member 18 and the straight pipe portion 12. As a result, it becomes necessary to seal at these two interfaces 26 and 31, not only the number of parts increases but also the sealing function becomes insufficient as a result.

The present invention has been made to solve the above problems. The purpose of this consideration is to provide a rotary male thread adapter for piping that has a reduced number of parts and an excellent sealing function.

[0009]

[Means for Solving the Problems]

 A rotary male thread adapter for piping according to the present invention includes an adapter body, a connecting pipe, and a seal (water blocking) member. The adapter body is composed of one member, has a tubular shape, has a thread formed on the outer peripheral surface, and has first and second recesses on the inner peripheral surface. The connection pipe is inserted into the main body of the adapter so as to project from one open end of the adapter body, and is engaged with the side walls of both the first and second recesses and fixed to the adapter body. The seal member is installed between the adapter body and the connection pipe.

As described above, in the rotary male thread adapter for piping according to the present invention, the adapter body is composed of one member. Therefore, only the interface between the adapter body and the connecting pipe needs to be sealed by the sealing member. As a result, it is possible to reduce the number of parts as compared with the above-described conventional example, which required sealing at a plurality of points. Further, as compared with the conventional example, the number of sealing portions can be reduced, and as a result, the sealing function can be improved. The connecting pipe may be fixed to the adapter body only by engaging with the first and second recesses as shown in FIG. 2 or 3, but it is shown in FIG. In some cases, a stopper member is required. In either case, the connecting pipe can be fixed to the adapter body by using the first and second recesses. Also, the connecting pipe is partially plastically deformed to engage with the side walls of the first and second recesses. As a result, at least two plastically deformed parts are formed in the connecting pipe. As a result, the torsional rigidity of the connecting pipe located in the adapter body can be improved, and the turning operation of the adapter body can be smoothly performed.

An annular groove is preferably formed on the inner peripheral surface of the adapter body located between the side wall of the first recess and the side wall of the second recess. Then, it is preferable that an O-ring made of an elastic member is fitted into the groove so as to come into contact with the outer peripheral surface of the connecting pipe. By providing such an O-ring, it becomes possible to effectively prevent the leakage of fluid from the interface between the adapter body and the connecting pipe. Note that a plurality of O-rings may be provided side by side. In this case, although the number of parts is slightly increased, the sealing function can be further improved and the durability of the O-ring can be improved.

Further, the end portion of the connecting pipe located on the other open end side of the adapter body is folded back to form an outward flange portion that comes into contact with the side wall surface of the first recess. preferable. In addition, the outward flange is formed not only by simply bending the end of the connecting pipe, but by folding it back (it has a two-layer structure as shown in Fig. 1), so the strength of the outward flange is great. Will be excellent. Therefore, it is possible to almost certainly prevent the displacement of the connecting pipe.

[0013]

[Embodiment of device]

 Embodiments of the present invention will be described below with reference to FIGS.

First Embodiment First, a rotary male thread adapter for piping according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 4. FIG. 1 is a partial sectional side view showing a rotary male thread adapter for piping 1 according to the present invention. FIG. 4 is a partial cross-sectional side view showing an example of use of the rotary male screw adapter 1 shown in FIG.

First, referring to FIG. 1, a rotary male screw adapter 1 according to the present invention includes a cylindrical adapter body 2 made of, for example, metal, a connecting pipe 3 made of copper pipe, and a rubber. And an O-ring 5 made of an elastic member. A male screw portion 2a is selectively formed on the outer peripheral surface of the adapter body 2. The inner peripheral surface of the adapter body 2 is provided with annular recesses 2b, 2c, 2e and annular grooves 2d, 2f.

The recess 2 b is provided on one open end side of the adapter body 2 and receives the spring coil 6. In the embodiment shown in FIG. 1, two groove portions 2d are provided, and the O-rings 5 are fitted therein. A lubricant may be applied to the O-ring 5. This allows the adapter body 2 to rotate smoothly. Further, by providing the O-ring 5 as described above, it becomes possible to effectively prevent the fluid from leaking from the interface between the adapter body 2 and the connection pipe 3. The groove 2d is preferably provided between the side wall of the recess 2c and the side wall of the recess 2e.

The connecting pipe 3 has an enlarged diameter portion 3a and an outward flange portion 3b. The enlarged diameter portion 3a is a portion in which the diameter of the connection pipe 3 increases in the radial direction as a result of the connection pipe 3 extending along the recess 2c. In this way, the movement of the connecting pipe 3 in the direction of the arrow 7 in FIG. 1 is restricted by the engagement of the expanded diameter portion 3a and the recess 2c.

The outward flange portion 3b is formed by folding the end portion of the connecting pipe 3 and overlapping it in two layers. Therefore, the strength of the outward flange portion 3b is excellent. The outward flange portion 3b is engaged with the side wall of the recess 2e. The snap ring (retaining ring) 4 is fitted in the groove 2f. This snap ring 4 is preferably installed so as to come into contact with the outward flange portion 3b, and the snap ring 4 regulates the movement of the connecting pipe 3 in the direction of the arrow 8 in FIG. The connection pipe 3 is fixed to the adapter body 2 by the snap ring 4 and the recesses 2c and 2e.

In the above configuration, the adapter body 2 is composed of one member as shown in FIG. Therefore, the fluid can leak only from the interface between the adapter body 2 and the connection pipe 3. As a result, it is possible to reduce the number of fluid leakage points as compared with the conventional example. By installing the O-ring 5 at the interface between the adapter body 2 and the connection pipe 3, it becomes possible to effectively prevent the leakage of fluid.

Further, as described above, the number of sealing points is reduced by reducing the number of fluid leakage points. Thereby, the number of parts can be reduced. As a result, the manufacturing cost can be reduced. Further, the connecting pipe 3 is plastically deformed by forming the enlarged diameter portion 3a. Along with this, the expanded diameter portion 3a is work hardened. Further, the outward flange portion 3b is also formed by plastically deforming the end portion of the connecting pipe 3, so that it is work hardened. As a result, the strength of the connecting pipe 3 located in the adapter body 2 against twisting can be increased, and the rotational movement of the adapter body 2 can be performed smoothly.

Next, a usage example of the rotary male thread adapter 1 shown in FIG. 1 will be described with reference to FIG.

Referring to FIG. 4, connection pipe 3 is mounted in adapter body 2 so as to project from one open end of adapter body 2. In this case, the connecting pipe 3 partially has a spiral part 9. A spring coil 6 is attached on the outer peripheral surface of the connecting pipe 3. A head adapter 10 is attached to the end of the connecting tube 3 on the side away from the adapter body 2. The head adapter 10 and the connecting pipe 3 are brazed, for example. Then, the head adapter 10 is connected to the sprinkler head and other pipes.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. 2 is a partial cross-sectional side view showing a rotary male screw adapter 1 according to a second embodiment of the present invention.

With reference to FIG. 2, in the present second embodiment, a bulging portion 3 c is provided at the end portion of connection pipe 3. The adapter body 2 is provided with an annular groove 2g that receives the bulging portion 3c. By disposing the bulging portion 3c in the groove 2g, the movement of the connecting pipe 3 in the direction of the arrow 8 can be regulated without using the snap ring 4. As a result, the connection pipe 3 can be fixed to the adapter body 2. Therefore, the snap ring 4 provided in the first embodiment described above is unnecessary. As a result, it is possible to further reduce the number of parts as compared with the case of the first embodiment. The other structure is almost the same as that of the first embodiment.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a partial cross-sectional side view showing a rotary male screw adapter 1 according to a third embodiment of the present invention.

Referring to FIG. 3, in the present third embodiment, the inner surface of adapter body 2 located between recess 2 c and recess 2 e projects inward of adapter body 2. Then, the connecting pipe 3 is attached along the inner peripheral surface of the adapter body 2, so that the connecting pipe 3 has a reduced diameter portion 3d. As shown in FIG. 3, since the connecting pipe 3 is engaged with both the side wall of the recess 2c and the side wall of the recess 2e, the movement of the connecting pipe 3 in the arrow 7 and arrow 8 directions is restricted. . That is, the connection pipe 3 is fixed to the adapter body 2. Therefore, also in the third embodiment, the snap ring 4 shown in FIG. 1 is unnecessary. As a result, also in the case of the third embodiment, as in the case of the above-described second embodiment, it is possible to further reduce the number of parts as compared with the case of the first embodiment.

It should be considered that the embodiments disclosed this time are exemplifications in all points and not restrictive. The scope of the present invention is shown by the claims for utility model registration, and is intended to include meanings equivalent to the claims for utility model registration and all modifications within the scope.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing a rotary male screw adapter according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view showing a rotary male screw adapter according to a second embodiment of the present invention.

FIG. 3 is a partial cross-sectional side view showing a rotary male screw adapter according to a third embodiment of the present invention.

FIG. 4 is a partial cross-sectional side view showing an example of use of the rotary male screw adapter shown in FIG.

FIG. 5 is a partial sectional side view showing a conventional rotary connection fitting for pipe connection.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotating male screw adapter 2 Adapter body 2a Male screw part 2b, 2c, 2e Recessed part 2d, 2f, 2g Groove part 3a Expanded part 3b Outward flange part 3c Expanded part 3d Reduced part 4 Snap ring 5 O-ring 6 Spring coil

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takeshi Uebayashi 1-9-18 Kaigan, Minato-ku, Tokyo International Hamamatsucho Building 9F Shinko Metal Products Stock Company In-house

Claims (3)

[Scope of utility model registration request] 1. A cylindrical adapter body having a screw formed on the outer peripheral surface thereof, first and second recesses provided on the inner peripheral surface thereof, and formed of one member, and one opening of the adapter body. A connection pipe that is inserted into the adapter body so as to project from the end, engages with both side walls of the first and second recesses, and is fixed to the adapter body; and the adapter body and the connection pipe. A rotary male screw adapter for piping, comprising: a seal member installed between the two. 2. An annular groove is formed on an inner peripheral surface of the adapter body located between a side wall of the first recess and a side wall of the second recess, and the connecting pipe is formed in the groove. The rotary male screw adapter for piping according to claim 1, wherein an O-ring made of an elastic member is fitted so as to abut the outer peripheral surface of the pipe, and the O-ring functions as the sealing member. 3. The first concave portion is provided in the vicinity of the other opening end of the adapter body, and the end portion of the connecting pipe located on the other opening end side is folded back, whereby the first concave portion is formed. The outward flange portion that abuts the side wall surface of the recess is formed.
Rotating male thread adapter for piping as described in.