JP2007270875A - Header pipe connection structure and header pipe connection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To connect a resin pipe with a header or a water equipment item only by highly reliable and simple connection work so as to secure highly qualified piping in a construction site, regardless of a level of skill of a worker. <P>SOLUTION: Joint members 3 are installed in a water tight manner to both end parts of the resin pipe 1 in advance, and fitting projection parts 22 of connecting members 2 are connected in the water tight manner with each joint member 3. Each connecting member 2 has a pair of male and female structure mutually fit, and the other fitting recess parts are connected with a socket of the header and a pipe connecting port of the equipment item. The resin pipe 1 is carried in the construction site in such a state that the resin pipe 1 is connected with the fitting projection parts 22 of the connecting parts 2 and the joint members 3, and then the resin pipe 1 is connected with the socket of the header and the pipe connecting port of the equipment item so as to connect them in the water tight manner. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a header pipe connection structure and a header pipe connection method.

  2. Description of the Related Art In recent years, a header construction method in which a header is provided for each dwelling unit or a sheath pipe construction method has been frequently used as a water supply hot water supply piping system in an apartment house or the like. The header construction method is a header construction method in which a water supply main pipe and a hot water supply main pipe are respectively connected to the header, and branch pipes branched from the header are connected one-to-one to the faucets of each watering facility. In addition, these main pipes and branch pipes are piped through flexible sheath pipes previously laid under the floor of the building or in the walls. According to this construction method, since the connection portion is only the header portion and the faucet portion, the leakage rate can be suppressed, and the flow rate change in the simultaneous use of the watering equipment is small, and stable water supply or hot water supply is possible. . In addition, since the sheath pipe is laid in advance, the construction is easy, and there is an advantage that the floor and the wall in which the pipe is stored can be easily replaced without dismantling the pipe.

  Various proposals have hitherto been made for such a header construction method. For example, Patent Document 1 describes a water supply / hot water supply piping system in a house. The pipe materials used for this type of header piping are pipe materials mainly made of cross-linked polyethylene or polybutene. As products, they are transported to the site as a 50m long roll, and the required length at the construction site. It is common to cut and use for construction.

Moreover, various joints are used for the header in such a header construction method, or a connection part between a plumbing equipment such as a kitchen, a bathroom, a laundry, a bath, and a pipe. For example, pipe joints such as those described in Patent Document 2 are most frequently used. This type of pipe joint has a joint main body having an insertion tube portion inserted into the end portion of the pipe to be connected, and the inner peripheral side is latched to the outer peripheral surface of the pipe externally fitted to the insertion tube portion. And a plurality of tooth portions cut into the inner peripheral side of the retaining ring. Such a joint can be connected simply by inserting a pipe cut to a predetermined length in the field into the joint body, and is called a so-called one-touch joint.
JP 2001-65008 A Japanese Patent Laid-Open No. 2002-3182

  However, in the connection work using the pipe joint as in the conventional example, the resin pipe at the construction site and the joint member connected to both ends of the resin pipe are connected to each other. Due to various work contents in the connection process, such as the condition of the cut end of the resin pipe, oblique insertion at the time of connection, insufficient insertion, etc., construction failure is likely to occur, and depending on the skill level of the worker, it may cause a water leakage accident It was difficult to maintain reliability.

  Therefore, the present invention has been made in view of the above problems, and without depending on the skill level of the operator, the connection between the resin pipe and the header at the construction site, and the connection work to the plumbing equipment. Header piping connection that enables high-quality piping with no risk of water leakage, ensuring high water-tightness at the connecting portion of the resin pipe so that it can be completed with simple and reliable connection work. A structure and a header pipe connection method are provided.

  In order to achieve the above-described object, the present invention provides a header pipe connection in which a joint connection port provided in a header and a pipe connection port of a plumbing equipment are connected by a resin pipe combined with a joint member. The header receiving port and the piping connecting port of the equipment are fitted with one of connecting members having a structure capable of being watertightly coupled and a pair of males and females. A joint member is attached to both ends in advance in a watertight manner, and the other of the connection members is connected to each joint member in a watertight manner, and a header opening provided with one of the connection members and By connecting the both ends of the resin pipe provided with the other of the connection members to the pipe connection port of the equipment, respectively, it is possible to connect each other in a watertight manner.

  Further, one of the connection members is a fitting recess having an annular flange on the outer peripheral surface, and the other is a fitting convex portion having an annular flange on the outer peripheral surface and being fitted into the fitting recess. In addition, a seal groove is formed on the outer peripheral surface of the fitting convex portion, and an O-ring is attached to the sealing groove, so that the gap between the fitting concave portion and the fitting convex portion can be sealed in a watertight manner. The fitting protrusions are inserted into the fitting recesses, the flanges are butted together, and a clip member formed by bending a metal leaf spring material is fitted to these flanges so that they can be combined together. It has been made.

  The joint member has a joint body that is attached to the end portion of the resin pipe and is integrally fastened to the end portion of the resin pipe by the fastening means, and the joint body is in close contact with the inner peripheral surface of the resin pipe. A cylindrical incore to be inserted is provided, and the incore and the resin pipe end are coupled by the tightening means.

  Here, it is preferable that the fastening means of the joint member is caulking.

  Further, the means for tightening the joint member may be by screwing between a male thread portion formed on the outer peripheral surface of the joint body and a cap nut externally attached to the end portion of the resin pipe.

  Further, the joint member tightening means may be formed by pressing a cylindrical slide sleeve that is expanded in diameter by a minute size and press-fitted into the outer peripheral surface of the resin pipe end portion into which the in-core is inserted. Good.

  In addition, the present invention is a header pipe connection method for connecting a joint connection port provided in a header and a pipe connection port of a plumbing equipment using a resin pipe combined with a joint member. The header receiving port and the piping connecting port of the equipment are fitted with one of the connecting members that are watertightly coupled to the joint member and have a structure of a male and female pair, and have a predetermined piping length. The joint member is attached to both ends of the resin pipe having water-tightness in advance, and the other of the connecting members is water-tightly coupled to each joint member and carried to the construction site. By connecting both ends of the resin pipe provided with the other of the connecting members to the receiving port and the piping connection port of the equipment, respectively, they are connected to each other in a watertight manner.

  According to such an invention, the connection work between the resin pipe and the joint member or the like at the construction site of the header pipe becomes unnecessary, so that the pipe work of the resin pipe becomes much easier and the work process can be shortened. In addition, since it is possible to confirm that the connected resin pipe has high water tightness, it is possible to improve the reliability of the piping by conducting a water tightness test, and to ensure high quality. It becomes.

  According to the present invention, there is no connection work between the resin pipe and the joint member having the resin pipe connection portion at the construction site, and the piping work can be performed only with a simple and reliable connection work. Therefore, high water tightness at the connecting portion of the resin pipe can be easily ensured, and there is no fear of water leakage or the like, and piping with high quality is possible.

  In addition, since the resin pipe is carried in with one of the joint member and the connecting member connected to both ends, it is possible to carry out a watertightness confirmation test before carrying it into the construction site. Compared to the water pressure test to be carried out, it has better fault detection accuracy. Thereby, it is also possible to carry out a highly accurate water tightness test, and it is possible to ensure higher quality as piping.

  Hereinafter, the best mode for carrying out the header pipe connection structure and the header pipe connection method according to the present invention will be described with reference to the drawings.

  1 to 16 show an example of the present invention, FIG. 1 is a perspective view showing an end portion of a resin pipe, FIGS. 2 to 4 are perspective views showing examples of connection members, and FIGS. 5 to 16 are joint members. FIG.

  As shown in FIG. 1, the header pipe connection structure of the present invention includes a joint connection receiving port of a header provided in an underfloor pipe of a house and the like, and a pipe connection port of a plumbing equipment in a living room. It connects using the resin pipe | tube 1 which combined the coupling member 3. As shown in FIG.

  One of the connection members 2 that are watertightly connectable and have a structure of a male and female pair is mounted on the receiving port side of the header and the piping connection port side of the equipment.

  Here, the connection member 2 is a connection member based on a so-called fastener type connection, and includes a fitting concave portion 21 and a fitting convex portion 22 that are fitted into each other as illustrated in FIG. One fitting recess 21 has an annular flange 211 protruding from the tip of the outer peripheral surface. The other fitting convex portion 22 is formed so that the tip portion can be fitted into the fitting concave portion 21, and has a seal groove on the outer peripheral surface, and an O-ring 221 is attached to this seal groove. On the base side of the fitting convex portion 22, an annular flange 222 similar to the flange 211 of the fitting concave portion 21 is projected.

  As a result, when the fitting concave portion 21 and the fitting convex portion 22 are fitted, the inner peripheral surface of the fitting concave portion 21 and the outer peripheral surface of the fitting convex portion 22 are brought into close contact with each other and can be sealed watertight. It has become. Further, as shown in FIG. 3 and FIG. 4, when the fitting recess 21 and the fitting projection 22 are fitted, the flanges 211 and 222 are abutted, so that a metal leaf spring material is applied to the flanges 211 and 222. The clip member 23 formed by bending can be fitted to be coupled together.

  On the other side of the connecting member 2, the fitting convex portion 22 is connected to both ends of the resin tube 1. The resin pipe 1 is preferably a flexible pipe material, which is cut in advance to a predetermined length necessary for the header pipe, and the joint members 3 are attached to both ends thereof in a watertight manner.

  The joint member 3 illustrated in FIG. 5 includes a joint body 31 that is integrally fastened to the end of the resin pipe 1. The joint body 31 includes a cylindrical incore 32 that is fitted and inserted into the inner peripheral surface of the resin tube 1 in a close state. Then, the end portion of the resin tube 1 is fitted into the joint main body 31 and is externally mounted on the in-core 32, and the in-core 32 and the end portion of the resin tube 1 are coupled by a crimping stop 311. And the fitting convex part 22 of the connection member 2 is connected to the joint main body 31 of this joint member 3.

  Such a resin pipe 1 is carried into a construction site in a state where one of the joint member 3 and the connection member 2 is mounted in a watertight manner in advance in the piping construction. That is, the operation of connecting the joint member 3 and the like to both ends of the resin pipe 1 is performed at the manufacturing stage of the resin pipe 1.

  For this reason, it is possible to carry out a water-tightness confirmation test of a portion where the joint member 3 or the like is connected in a subsequent process after the connection work of the joint member 3 or the like in the resin pipe 1 is completed. Compared with the water tightness confirmation test (water pressure test) that is normally performed at the construction site, the accuracy of defect detection is significantly increased, and it is possible to perform an underwater test in a large-scale facility.

  Accordingly, the connection state of the joint member 3 and the like connected to the end portion of the resin pipe 1 can be confirmed with high accuracy in water tightness, and is used for header piping through such a test. And reliability can be ensured.

  In addition to the above, the connection structure at both ends of the resin tube 1 may be a structure as shown in FIG. In this embodiment, the joint member 3 mounted in advance on both ends of the resin pipe 1 includes a joint body 31 and a sleeve 33. As shown in FIGS. 9 to 11, the end portion of the resin tube 1 into which the in-core 32 of the joint body 31 is inserted is arranged such that the inner diameter is slightly larger than the outer peripheral surface of the in-core 32, and the outer diameter is a resin tube. The diameter is increased by using an appropriate diameter expanding means so as to be larger than 1.

  A cylindrical sleeve 33 is inserted into the resin tube 1. Then, the end portion of the resin pipe 1 is fitted into the joint body 31 and sheathed on the in-core 32, and the sleeve 33 is slid in the distal direction of the resin tube 1 to increase the diameter, and is press-fitted to the outer peripheral surface of the end portion of the resin tube 1 Let By pressing the sleeve 32, the inner peripheral surface of the resin tube 1 and the in-core 32, and the outer peripheral surface of the resin tube 1 and the inner peripheral surface of the sleeve 33 are in close contact with each other, and high water tightness is ensured. It has become.

  Moreover, the joint member 3 connected to the both ends of the resin pipe 1 may be one using the cap nut 34 shown in FIGS. In the joint member 3, a male thread portion 35 is formed on the outer peripheral surface of the joint body 31 including the in-core 32. An annular cap nut 34 that can be screwed into the male thread portion 35 and a ring member 36 whose outer peripheral surface is tapered in the tip direction are inserted into the resin tube 1.

  As shown in FIG. 13, the joint member 3 and the resin pipe 1 are connected by inserting the resin pipe 1 into the in-core 32 and sliding the ring member 36 along the outer peripheral surface of the resin pipe 1 in the distal direction. Move to the joint body 31. Then, as shown in FIG. 14, the ring member 36 is fitted and fixed inside the external thread portion 35 of the joint body 31, and the cap nut 34 is slid along the outer peripheral surface of the resin tube 1 in the distal direction. Subsequently, as shown in FIG. 15, the cap nut 34 is screwed into the male screw portion 35 and tightened. By screwing the cap nut 34, the inner peripheral surface of the resin tube 1 and the in-core 32, and the outer peripheral surface of the resin tube 1 and the inner peripheral surface of the ring member 36 are water-tightly adhered, so that high water-tightness can be secured. It has become.

  In addition to the above three structures, the joint member 3 may be any member as long as it has a structure that can be easily connected to the resin pipe 1 and can ensure high water tightness. As for the connecting member 2, any member other than those exemplified above may be used as long as the connecting member 2 has a structure of a male and female pair fitted to each other and can be connected in a watertight manner.

  With the header pipe connection structure and the header pipe connection method as described above, the connection work between the resin pipe 1 and the joint member 3 etc. at the construction site of the header pipe is unnecessary, so the pipe work of the resin pipe 1 is much easier. Thus, the work process can be shortened. Moreover, since it has been confirmed that the connected resin pipe 1 has high water tightness, it is possible to improve the reliability of the piping and to ensure high quality.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used to form a piping path for water supply, hot water supply, etc. in the header piping method using a resin pipe with good workability and high reliability.

It is a perspective view which shows the edge part of the resin pipe | tube in this invention. It is a perspective view which shows an example of the connection member in this invention. It is a perspective view which shows the connection process of the said connection member. It is a perspective view which shows the connection state of the said connection member. It is a perspective view which shows an example of the coupling member in this invention. It is a perspective view which shows the connection process of the said coupling member. It is a perspective view which shows the connection state of the said joint member. It is a perspective view which shows the other example of the resin pipe end part in this invention. It is a perspective view which shows the other example of the coupling member in this invention. It is a perspective view which shows the connection process of the said coupling member. It is a perspective view which shows the connection state of the said joint member. It is a perspective view which shows the other example of the coupling member in this invention. It is a perspective view which shows the connection process of the said coupling member. It is a perspective view which shows the connection process of the said coupling member. It is a perspective view which shows the connection process of the said coupling member. It is a perspective view which shows the connection state of the said joint member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin pipe 2 Connection member 21 Fitting recessed part 211 Flange 22 Fitting convex part 221 O-ring 222 Flange 23 Clip member 3 Joint member 31 Joint main body 32 Incore 33 Sleeve (slide sleeve)
34 Cap nut 35 Male thread 36 Ring member

Claims (7)

A header pipe connection structure for connecting a joint connection receiving port provided in the header and a pipe connection port of a plumbing equipment with a resin pipe combined with a joint member,
One of the connection members equipped with a structure that can be coupled in a watertight manner and a pair of male and female is attached to the header receiving port and the piping connecting port of the equipment,
A joint member is preliminarily watertightly attached to both ends of the resin pipe of a predetermined length, and the other of the connection members is respectively watertightly coupled to each joint member,
By connecting both ends of the resin pipe provided with the other of the connecting members to the header receiving port provided with one of the connecting members and the piping connecting port of the equipment, respectively, water-tight connection is possible. Header piping connection structure characterized by this. One of the connecting members is a fitting concave portion having an annular flange on the outer peripheral surface, and the other is a fitting convex portion inserted into the fitting concave portion having an annular flange on the outer peripheral surface,
A seal groove is formed on the outer peripheral surface of the fitting convex portion, and an O-ring is attached to the sealing groove so that the space between the fitting concave portion and the fitting convex portion can be sealed in a watertight manner. And
The fitting projections are inserted into the fitting recesses, the flanges are butted together, and a clip member formed by bending a metal leaf spring material is fitted to these flanges so that they can be combined together. The header pipe connection structure according to claim 1, wherein   The joint member has a joint body that is attached to the end portion of the resin pipe and is integrally fastened to the end portion of the resin pipe by fastening means, and the joint body is fitted and inserted into the inner peripheral surface of the resin pipe in a close state. The header pipe connection structure according to claim 1 or 2, wherein a cylindrical incore is provided, and the incore and the resin pipe end are coupled by the tightening means.   The header pipe connection structure according to claim 3, wherein the fastening means of the joint member is caulking.   4. The header pipe according to claim 3, wherein the fastening means for the joint member is formed by screwing a male thread portion formed on the outer peripheral surface of the joint body and a cap nut externally attached to the end portion of the resin pipe. Connection structure.   The fastening means for the joint member is formed by pressing a cylindrical slide sleeve that is expanded by a minute dimension and press-fitted into an outer peripheral surface of a resin pipe end portion into which an incore is inserted. 3. Header pipe connection structure according to 3. A header pipe connection method for connecting a joint connection port provided in a header and a pipe connection port of a water facility equipment using a resin pipe combined with a joint member,
At the receiving port of the header and the piping connection port of the equipment, one of the connecting members having a structure capable of being watertightly coupled to the joint member and having a pair of male and female is mounted.
At the both ends of the resin pipe having a predetermined pipe length, the joint member is mounted in a watertight manner in advance, and the other of the connection members is watertightly coupled to each joint member and carried to the construction site.
By connecting both ends of the resin pipe provided with the other of the connecting members to the header receiving port provided with one of the connecting members and the piping connecting port of the equipment, respectively, the watertight connection is established. Header piping connection method.

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