JP2007107618A - Pipe fitting and its protective cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To connect a resin made pipe through an adhesive agent, and to prevent influence of the adhesive agent even when an amount of the adhesive agent more than a prescribed amount is applied when fastener-connecting the resin pipe and a metallic pipe with the usage of an elastic connecting metal fitting. <P>SOLUTION: The pipe fitting 1 is the pipe fitting made of resin to be connected to a metallic pipe joint provided with a main body part for connecting the metallic pipe and a socket part which continues to the main body part and has a flange through the elastic connecting metal fitting. The pipe fitting is provided with: a main body part 2 connecting the pipe made of resin through the adhesive agent; and a spigot part 3 arranged continuously to the main body part 2 and having a flange 4. A storing part 2a of the adhesive agent is formed on an inner peripheral surface side deep inner part of the main body part 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pipe joint that can be connected by a fastener with an elastic connection fitting and a protective cap for the pipe joint.

  Conventionally, when connecting parts such as metal pipes and faucet fittings and resin pipes, metal insert parts are provided integrally with resin pipe joints, and metal pipes can be directly or metallized. In other words, a screw connection is performed through a pipe joint (see, for example, Patent Document 1).

  For example, as shown in FIG. 6, a metal insert part 81 provided integrally with a resin pipe joint 80 is screwed to a metal pipe joint 90, and a main body portion 82 of the resin pipe joint 80. On the other hand, resin pipes are connected to each other through an adhesive, and metal pipes and faucet fittings are screwed to the main body portion 91 of the metal pipe joint 90, so that the metal pipes and the resin pipes are joined. It is trying to connect with other piping.

  On the other hand, a method called fastener connection is known as one of methods for connecting pipes. This fastener connection connects a pipe connected to a main body portion of a pipe joint having a receiving port portion provided with a flange at an end portion and a pipe connected to a main body portion of a pipe joint having an insertion port portion provided with a flange. In this case, the insertion portion of the other pipe joint is inserted into the receiving portion of one of the pipe joints, the flanges are overlapped, and then the elastic connection fitting is inserted into the pair of flanges overlapped.

  Specifically, as shown in FIG. 7, the elastic connection fitting 100 is formed in a substantially Ω shape as viewed from the front as a whole by bending a spring plate material, and a pair of substantially semicircular shapes. A main body part 100a, a pair of guide parts 100b connected to each end of the main body part 100a, and a connecting part 100c connected between the other ends of the pair of main body parts 100a. Since the flanges f1 and f2 of the pipe joints J1 and J2 in the pipes P1 and P2 are engaged over a part of the connecting portion 100c in the vicinity of the main body 100a, the engagement groove 100d has a width corresponding to the combined thickness of the flanges f1 and f2. Is formed in the circumferential direction, and a notch 100e for inserting the pipe joints J1 and J2 in a direction perpendicular to the axial direction of the pipes P1 and P2 is provided between the opposing guide portions 100b and 100b. It has been made.

  In addition, in order to avoid interference with the flanges f1 and f2, the connecting portion 100c is bent into a U-shape protruding outward in the radial direction, and each tip thereof is connected to each other end of the main body portion 100a. In addition, the guide portion 100b is formed in a divergent shape extending in a direction of separating from the main body portion 100a so as to guide insertion of the pipe joints J1 and J2.

When the pair of pipes P1 and P2 are connected using the elastic connection fitting 100 configured in this way, the fitting of the pipe joint J1 to which one pipe P1 is connected is connected to the pipe joint to which the other pipe P2 is connected. The flanges f1 and f2 are overlapped with each other, and the elastic connecting fitting 100 is fitted into the flanges f1 and f2 of the pipe joints J1 and J2 through the notch 100e. Thereby, the elastic connecting fitting 100 is elastically deformed and expanded to the width corresponding to the outer diameter of the pipe joints J1 and J2 by expanding the opening width of the notch 100e, and then returns to the original size, thereby the pipe joint. The flanges f1 and f2 of J1 and J2 are engaged with the engagement groove 100d, so that the pipes P1 and P2 can be connected while preventing them from coming out. (For example, refer to Patent Document 2).
Japanese Utility Model Publication No. 50-10860 Utility Model Registration No. 3084382

  By the way, when connecting a metal pipe joint to a resin pipe joint provided with a metal insert part by screw connection, it is necessary to wrap a seal tape around the screw and then screw it in using a pipe wrench, There was a problem that the construction took time and the work became complicated.

  In addition, when bonding resin pipes to the main body of a resin pipe joint, if more than the specified amount of adhesive is applied, excess adhesive is pushed out and connected via the inner peripheral surface of the metal insert part. May reach the body of the metal pipe joint. In this way, when the adhesive flows to the metal pipe joint, the seal material provided on the metal pipe joint or the seal material such as piping or parts connected to the metal pipe joint is bonded. There is a risk of water leakage due to the deterioration of the agent.

  On the other hand, in the case of fastener connection using elastic connection fittings, it is only necessary to fit the elastic connection fittings, and the construction is simplified and there is no need to use tools, so there is no damage to the pipe joints. Become.

  However, the fastener connection by the elastic connection metal fitting is usually used for the connection of a metal pipe joint, and the inlet of one pipe joint and the outlet of the other pipe joint fitted in the receiver In order to ensure watertightness with the part, a sealing material such as an O-ring is attached to the opening.

  Connection between metal pipe joints using such elastic connection fittings, for example, resin pipe fittings connecting resin pipes, metal pipes connecting faucet fittings, etc. When applied to the connection with the pipe joint, as described above, when the resin pipe is bonded to the main part of the resin pipe joint by applying an adhesive of a specified amount or more, excess adhesive is extruded, There is a possibility that the sealing material provided at the opening portion may go around and deteriorate, or the cured adhesive may be caught in the sealing groove of the sealing material and leak water.

  The present invention has been made in view of such problems, and connects resin pipes via an adhesive, and connects fasteners of resin pipes and metal pipes using elastic connection fittings. In this case, the present invention provides a pipe joint that can prevent the influence of the adhesive even if a predetermined amount or more of the adhesive is applied.

  The pipe joint of the present invention includes a main body part to which a resin or metal pipe or the like can be connected, and a metal pipe joint provided with a receiving part provided with a flange connected to the main body part via an elastic connection fitting. A resin-made pipe joint that can be connected to a main body part to which a resin pipe can be connected via an adhesive, and an insertion part provided with a flange. Provided, the insertion portion can be fitted into the receiving portion, and the flange is provided so as to overlap with the flange of the metal fitting when the insertion portion is inserted into the receiving portion. An adhesive storage portion is formed in the inner peripheral surface side inner back portion.

  According to the present invention, after connecting a resin pipe or a metal pipe or the like to the main body of the metal pipe joint, the insertion part of the resin pipe joint is inserted into the receiving part of the metal pipe joint. After the flanges are overlapped with each other, a pair of pipes can be easily connected by fitting an elastic connection fitting into the pipe joint to prevent the pair of flanges from coming out. Next, after applying an adhesive to the main body of the resin pipe joint, a resin pipe may be connected.

  Here, even if the excess adhesive is pushed inward by the insertion of the resin pipe, the excess adhesive pushed out is bonded by applying a specified amount or more of adhesive to the main body. It is stored in the agent storage part, and can be prevented from reaching the metal pipe joint through the inner peripheral surface of the insertion port part. Therefore, it is possible to prevent the influence of the adhesive on the seal material provided on the metal pipe joint, the seal material of pipes and parts connected to the metal pipe joint, and the like.

  In this invention, it is preferable that the main-body part which can connect the said resin piping via an adhesive agent is a product made from hard vinyl chloride. By adopting the vinyl chloride resin, it is possible to easily connect with a vinyl chloride resin tube widely used as a pipe material through an adhesive.

  The pipe joint according to the present invention includes a main body part to which a resin pipe can be connected via an adhesive and a resin pipe joint provided with an insertion part provided with a flange and connected to the main body part. A metal pipe joint that can be connected via a main body part to which a resin or metal pipe or the like can be connected and a receiving part provided with a flange. Provided, the receiving part is capable of inserting the insertion part, and the flange is provided so as to overlap with the flange of the resin pipe joint when the insertion part is inserted into the receiving part. A dam portion that protrudes inward beyond a water-permeable surface such as a pipe connected to the main body portion is formed in the inner peripheral surface side inner back portion.

  According to the present invention, after connecting a resin pipe or a metal pipe or the like to the main body of the metal pipe joint, the insertion part of the resin pipe joint is inserted into the receiving part of the metal pipe joint. After the flanges are overlapped with each other, a pair of pipes can be easily connected by fitting an elastic connection fitting into the pipe joint to prevent the pair of flanges from coming out. Next, after applying an adhesive to the main body of the resin pipe joint, a resin pipe may be connected.

  Here, when a predetermined amount or more of the adhesive is applied to the main body, excess adhesive is pushed inward by insertion of a resin pipe, and a metal pipe is passed through the inner peripheral surface of the opening. Even if it reaches the joint, the excess adhesive pushed out is stored in the space formed by the weir portion provided in the inner peripheral side of the receiving port and the front end surface of the insertion port. Further, it can be prevented from flowing out to the metal pipe joint side. Therefore, it is possible to prevent the influence of the adhesive on the seal material provided on the metal pipe joint, the seal material of pipes and parts connected to the metal pipe joint, and the like.

  The protective cap for a pipe joint according to the present invention can be attached to the inlet portion of the pipe joint according to claim 1 and has an inner diameter corresponding to the outer diameter of the inlet portion, and a sealing material provided at the inlet portion. And a fitting portion that is provided at the tip of the cylindrical portion and can be fitted to the opening of the insertion portion.

  According to the present invention, prior to connecting the resin pipe joint to the metal pipe joint, when connecting the resin pipe to the main body of the resin pipe joint via the adhesive, the protective cap By attaching to the insertion port, the opening of the insertion port can be closed and the sealing material provided on the outer peripheral side can be covered and protected.

  Here, even if excess adhesive is pushed inward by insertion of resin pipes due to the application of an adhesive of a specified amount or more to the main body part, the outer periphery passes through the inner peripheral surface of the insertion part. It is possible to prevent wrapping around the surface and to prevent the influence of the adhesive on the sealing material.

  If the adhesive hardens, remove the protective cap, then insert the resin pipe joint with the resin pipe connected to the metal pipe joint with the metal pipe connected first. A pair of pipes may be connected by fitting the elastic flanges into the pipe joint and preventing the pair of flanges from coming out after the flanges are fitted together. At this time, since the adhesive is hardened, there is no influence of the adhesive on the sealing material provided on the metal pipe joint, the sealing material such as piping and parts connected to the metal pipe joint, and the like.

  According to the present invention, when a resin pipe is connected via an adhesive, and a resin pipe and a metal pipe are connected by a fastener using an elastic connection fitting, an adhesive of a specified amount or more is temporarily assumed. Even if it apply | coats, the influence of an adhesive agent can be prevented.

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

  FIG. 1 shows an embodiment of a pipe joint 1 according to the present invention.

  The pipe joint 1 is made of a synthetic resin, for example, a hard polyvinyl chloride resin, and can be connected to a main body 2 to which a resin pipe can be connected, and an insertion port 3 provided with a flange 4 connected to the main body 2. And is set so that it can be connected to a metal pipe joint 10 to which a metal pipe described later can be connected. An adhesive reservoir 2 a is formed in the inner peripheral surface side inner back of the main body 2. A plurality of seal grooves 3a are formed on the outer peripheral surface of the insertion portion 3, and a seal material 5 such as an O-ring is attached to each seal groove 3a.

  On the other hand, FIG. 2 shows another pipe joint of the present invention, specifically, a pipe joint 10 that can be connected to the pipe joint 1 described above. This pipe joint 10 is made of metal, and has a main body part 11 capable of screw-connecting parts such as metal pipes and faucet fittings, and a receptacle provided with a flange 13 at the end part. Part 12. A dam portion 121 that protrudes inward from the inner diameter of the inner peripheral surface serving as a water-permeable portion such as a metal pipe connected to the main body portion 11 is provided in the inner peripheral portion on the inner peripheral surface side of the receiving port portion 12. Is formed.

  Here, the resin pipe joint 1 and the metal pipe joint 10 are set so that the insertion part 3 of the resin pipe joint 1 can be fitted into the receiving part 12 of the metal pipe joint 10. When the insertion port 3 is inserted into the receiving port 12, the flanges 4 and 13 are set to overlap.

  When connecting the pipe joints 1 and 10 thus configured via the elastic connection fitting 100, after connecting a metal pipe or the like to the main body 11 of the pipe joint 10, the port 3 of the pipe joint 1 is connected. Is inserted into the receiving port 12 of the pipe joint 10, and the flanges 4 and 13 are overlapped with each other (see FIG. 3). Next, referring to FIG. 7, the notch 100e of the elastic connection fitting 100 is made to face the outside of the pipe joints 1 and 10, and the engaging groove 100d is made to face the flanges 4 and 13, so that the axial direction of the pipe It suffices to fit in the perpendicular diameter direction. As a result, the elastic connection fitting 100 is elastically deformed and expanded to the width corresponding to the outer diameter of the pipe joints 1 and 10 after the opening width of the notch 100e is expanded, and then returned to the original size. 1 and 10 flanges 4 and 13 are engaged with the engaging groove 100d, and can be easily connected while being prevented from coming out.

  Next, after applying an adhesive to the inner peripheral surface of the main body 2 of the pipe joint 1, a resin pipe may be inserted into the main body 2 and connected.

  Here, if a predetermined amount or more of adhesive is applied to the inner peripheral surface of the main body portion 2 of the resin pipe joint 1 and the resin pipe is connected, the surplus adhesive is used for the resin pipe. It is pushed out toward the inner depth by the distal end surface, and is temporarily stored in the storage portion 2a formed in the inner depth portion on the inner peripheral surface side of the main body portion 2. Furthermore, even if surplus adhesive overflows from the storage part 2a and reaches the metal pipe joint 10 through the inner peripheral surface of the insertion part 3, it is provided in the inner part on the inner peripheral surface side of the receiving part 12. It is stored secondarily in the space formed by the distal end surface of the insertion port 3 inserted into the weir 121 and is prevented from flowing out further to the metal pipe fitting 10 side.

  As a result, it is possible to prevent the influence of the adhesive on the sealing material provided in the metal pipe joint 10 or the sealing material such as pipes and parts connected to the metal pipe joint 10.

  By the way, in embodiment mentioned above, after connecting the resin pipe joint 1 and the metal pipe joint 10, although the construction procedure which connects resin piping to the resin pipe joint 1 was demonstrated, resin-made In the case of construction in which a resin pipe is connected to the pipe joint 1 and then connected to the metal pipe joint 10, excess adhesive wraps around the outer peripheral surface via the inner peripheral surface of the insertion port 3, and seals There is a risk of affecting the material 5.

  For this reason, prior to the connection of the pipe joints 1 and 10, the protective cap 6 is prepared corresponding to the case where a resin pipe is connected to the pipe joint 1 via an adhesive.

  As shown in FIGS. 4 and 5, the protective cap 6 includes an inner diameter corresponding to the outer diameter of the outlet portion 3 of the pipe joint 1 and a plurality of sealing materials 5 provided on the outer peripheral surface of the inlet portion 3. A cylindrical portion 61 of a length that covers the bottom of the cylindrical portion 61, and provided at the distal end of the cylindrical portion 61, is in contact with the distal end surface of the outlet portion 3, and is fitted into an opening that serves as a water passage portion of the outlet portion 3. It is comprised from the fitting part 62 which closes this opening. Therefore, the opening can be closed by fitting the tubular portion 61 into the insertion portion 3 of the pipe joint 1 and fitting the fitting portion 62 into the opening of the insertion portion 3 (see FIG. 5). ).

  In addition, although it does not specifically limit as a material of the protective cap 6, It is preferable to form from polyethylene from points, such as a fitting degree, intensity | strength, and hardness.

  Therefore, when connecting the resin pipe to the resin pipe joint 1 prior to the connection with the metal pipe joint 10, as shown in FIG. 6 may be attached. In the state where the protective cap 6 is mounted in this manner, when a predetermined amount or more of an adhesive is applied to the inner peripheral surface of the main body portion 2 of the resin pipe joint 1 and the resin pipe is connected, excessive bonding is performed. The agent is pushed inward by the tip end surface of the resin pipe and is stored in the storage portion 2a formed in the inner peripheral surface side inner back portion of the main body portion 2. Furthermore, even if surplus adhesive overflows from the storage portion 2a and tries to go around the outer peripheral surface through the inner peripheral surface of the insertion port 3, the protective cap 6 comes into contact with the distal end surface of the insertion port 3 and By closing the opening, it is not possible to go around the outer peripheral surface, and it is possible to prevent the sealing material 5 and its sealing performance from being affected.

  Next, when the adhesive is cured, after the protective cap 6 is detached from the insertion port 3, the insertion port 3 of the resin pipe fitting 1 to which the resin piping is connected is connected to the metal piping or the like in advance. The fittings are inserted into the receiving port 12 of the connected metal pipe joint 10 and the flanges 4 and 13 are overlapped with each other, and then the elastic connection fitting 100 is fitted into the pipe fittings 1 and 10 to form a pair of flanges 4 and 13. A pair of pipes may be connected by preventing slipping out. In this case, since the adhesive is hardened, there is no influence of the adhesive on the sealing material provided for the metal pipe joint or the sealing material for piping or parts connected to the metal pipe joint. .

  In addition, in embodiment mentioned above, the case where the main-body part 11 of the metal pipe joint 10 connected to the resin pipe joint 1 formed the internal thread so that metal pipes, components, etc. can be screw-coupled is illustrated. However, when the metal pipe or component to be connected is an internal thread, the main body 11 is formed with an external thread on the outer peripheral surface thereof instead of the internal thread and is screwed to the pipe or the like. .

  In addition, depending on the type of pipe, an optimal structure for connecting the pipe can be provided in the main body 11. For example, when connecting a cross-linked polyethylene pipe, a one-touch joint for a cross-linked polyethylene pipe (trade name: ESLON (registered trademark) eslocatit) according to the manufacture and sale of the applicant is provided in the main body 11. Moreover, as a kind of piping connected, a polyethylene pipe, a polybutene pipe, a resin metal composite pipe, a polyvinyl chloride pipe, a copper pipe, a stainless steel pipe etc. can be mentioned besides a bridge | crosslinking polyethylene pipe.

  As described above, according to the present invention, resin pipes and metal pipes can be easily connected without impairing workability, and the influence of an adhesive connecting the resin pipes is prevented. Therefore, the reliability of pipe connection can be improved.

It is a half sectional view showing one embodiment of the pipe joint of the present invention. It is a half sectional view showing other embodiments of the pipe joint of the present invention. It is a half section which shows the state where the pipe joint of Drawing 1 and the pipe joint of Drawing 2 were connected. It is a half sectional view showing a protective cap of the present invention. It is a half sectional view showing the state where a protective cap was attached to the insertion port of the pipe joint. It is a half sectional view explaining the process of connecting the conventional pipe joint. It is a perspective view explaining the process of connecting a pair of pipe joint with the conventional elastic connection metal fitting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin pipe joint 2 Main body part 3 Insertion part 4 Flange 5 Sealing material 6 Protection cap 61 Cylindrical part 62 Fitting part 10 Metal pipe joint 11 Main body part 12 Receiving part 121 Weir part 13 Flange

Claims (4)

  Resin or metal main body that can be connected to piping, etc. and resin body that is connected to the main body and can be connected to a metal pipe joint having a receiving portion provided with a flange via an elastic connection fitting It is a pipe joint, and this pipe joint is provided with the main part which can connect resin piping via an adhesive agent, and the insertion part which provided the flange provided in the main part, and the insertion part is a receptacle. The flange is provided so as to overlap with the flange of the metal pipe fitting when the insertion port is inserted into the receiving port, and further, the inner part on the inner peripheral surface side of the main body A pipe joint characterized in that an adhesive reservoir is formed on the pipe joint.   2. The pipe joint according to claim 1, wherein the main body part to which the resin pipe is connectable via an adhesive is made of hard vinyl chloride.   Metal that can be connected to resin pipe joints that are provided with a flange that is connected to a main body that can be connected to resin pipes via an adhesive, and that is provided with a flange. A pipe joint having a main body part capable of connecting a resin pipe or a metal pipe, and a receiving part provided with a flange, the receiving part being an outlet The flange is provided so as to overlap with the flange of the resin pipe fitting when the insertion port is inserted into the receiving port. And a weir portion that protrudes inwardly beyond a water flow surface such as a pipe connected to the main body.   A tubular portion that is attachable to the insertion port portion of the pipe joint according to claim 1, has an inner diameter corresponding to the outer diameter of the insertion port portion, and covers a sealing material provided in the insertion port portion; A protective cap for a pipe joint, comprising: a fitting portion provided at a distal end of a tubular portion and capable of being fitted into an opening of an insertion portion.

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