JP2018054071A - Branch joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch joint capable of integrally fusing connection between a branch pipe connection part and a branch pipe without being affected by material of a main pipe for water service, and excellent in corrosion resistance and earthquake resistance.SOLUTION: A branch joint includes: a polyolefine rein-based saddle body 1 having a saddle part 2 mounted on a main pipe P with a water cutoff member 6 interposed therebetween, a branch cylinder part 3 integrally erected on an upper surface of the saddle part and a branch pipe connection part 4 integrally protrusively provided on a side wall of the branch pipe cylinder pipe; an upper clamp 10 installed so as to cover at least a part of a surface of the saddle part mounted on the main pipe; and a lower clamp 20 arranged on the side opposite to the upper clamp through the main pipe, and capable of being connected to the upper clamp. By connecting the upper clamp and the lower clamp, the saddle part is held in a state of being pressed against the main pipe side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a branch joint, and more particularly, to a branch joint used to take a branch from a main pipe.

  Conventionally, for example, as a branch joint (a faucet with a saddle) for taking out a branch from a water main, a standard "B117 faucet with a saddle for water supply" of the Japan Water Works Association (JWWA) is known. Patent Document 1 discloses a water faucet with a saddle for water supply. That is, in Patent Document 1, a saddle that can be mounted on a metal water main such as cast iron and a ball-type valve body loaded from a lower opening are supported by an annular fastening member that can be screwed into the lower opening in a watertight manner. And a metal water faucet body. The water faucet body is configured to be flanged to the saddle.

  Patent Document 2 discloses a so-called EF saddle type branch joint that is electrically fused to a main pipe. That is, in Patent Document 2, a saddle portion made of polyethylene resin with a built-in heating wire attached to a main pipe, and a standing screw integrally formed on the surface of the saddle portion, and an internal thread is formed on the inner surface. A branch cylinder part and a branch pipe connecting part integrally projecting on the side wall of the branch cylinder part, and a cylindrical seal plug is formed on the peripheral surface of the branch cylinder part. A branch joint that is screwed into a female screw on the inner surface of the branch cylinder portion is disclosed.

JP 2012-215275 A Japanese Patent No. 5411964

However, the conventional branch joint made of a water faucet with a saddle shown in Patent Document 1 has a drawback in that the water faucet body is made of metal such as gun metal, so that it is easily corroded and has a short service life.
In addition, since the water faucet body is made of metal, a union receiving port having a male thread is integrally provided on the water faucet body side, a conversion joint having a female thread is provided on the branch pipe side, and these screws are screwed together. The branch pipe is joined to the water faucet body. Such screw-type joining has a problem that it is inferior in earthquake resistance as compared with a pipe joining structure by electric fusion or the like.

  Further, in the EF saddle type branch joint shown in Patent Document 2, the branch pipe connecting portion to which the branch pipe is joined is also formed integrally with the EF saddle, so that the branch pipe is integrated with the branch pipe connecting portion. It has the feature that it can be fused and joined to form a branch joint with excellent earthquake resistance. However, this EF saddle type branch joint has the inconvenience that the main pipe is also limited to the thermoplastic resin because the saddle portion is electrically fused to the main pipe.

  Therefore, the present invention has been made in view of the above circumstances, and can be used without being limited to the material of the main pipe while having flexibility at the branch portion, and has excellent corrosion resistance. An object of the present invention is to provide a branch joint that can improve earthquake resistance.

  In order to achieve the above object, a branch joint according to the present invention includes a saddle portion that is attached to a main pipe with a water blocking member interposed therebetween, and a branch cylinder portion that is integrally provided upright on the upper surface of the saddle portion. A saddle body made of polyolefin resin having a branch pipe connecting part integrally projecting on the side wall of the branch cylinder part, and covering at least a part of the surface of the saddle part attached to the main pipe An upper clamp placed on the opposite side of the upper clamp via the main pipe, and configured to be connectable to the upper clamp, the upper clamp and the lower clamp, The saddle portion is configured to be held in a state of being pressed to the main pipe side by connecting.

  In the branch joint according to the present invention, since the saddle part, the branch cylinder part, and the branch pipe connection part of the saddle body are integrated with the polyolefin resin, the branch part can be made flexible and corroded. The service life can be extended without worrying about In addition, since the junction between the branch pipe connecting portion and the branch pipe can be fused and integrated through an EF socket or the like, it is possible to achieve excellent earthquake resistance as compared with the screw-in type. Furthermore, the saddle body is provided with a water stop member on the lower surface side of the saddle portion and placed on the surface of the main pipe, so that it is used without being limited to the material of the main pipe like an EF saddle type branch joint. be able to.

  In the branch joint according to the present invention, the upper clamp is formed with a notch portion for preventing the branch cylinder portion and the branch pipe connecting portion from interfering with each other when the upper clamp is placed on the surface of the saddle portion. It is characterized by having.

  The branch joint according to the present invention, when the upper clamp is placed on the surface of the saddle portion, because the upper clamp is provided with a notch, even if there is a branch tube portion and a branch pipe connection portion, It can be easily placed and workability can be improved.

  Furthermore, in the branch joint according to the present invention, a flange is formed in the saddle portion so as to protrude radially outward of the main pipe when the saddle section is attached to the main pipe. A bolt hole through which a bolt used when the lower clamp is connected is formed.

  In the branch joint according to the present invention, since the flange of the saddle part is sandwiched between the flange of the upper clamp and the flange of the lower clamp, the saddle body can be firmly supported and fixed to the main pipe.

  The branch joint according to the present invention includes a saddle portion that is attached to the main pipe with a water blocking member interposed therebetween, a branch cylinder portion that is integrally provided upright on the upper surface of the saddle portion, A saddle body made of polyolefin resin having a branch pipe connecting portion integrally projecting on the side wall, and a flange extending to the side of the saddle portion, and opposite to the saddle body via the main pipe A lower clamp arranged on the side and configured to be connectable to the saddle body, and connecting the saddle body and the lower clamp to hold the saddle portion pressed against the main pipe side. It is configured as described above.

  In the branch joint according to the present invention, since the saddle part, the branch cylinder part, and the branch pipe connection part of the saddle body are integrated with the polyolefin resin, the branch part can be made flexible and corroded. The service life can be extended without worrying about In addition, since the junction between the branch pipe connecting portion and the branch pipe can be fused and integrated through an EF socket or the like, it is possible to achieve excellent earthquake resistance as compared with the screw-in type. Further, since the saddle body is mounted on the surface of the main pipe with a water stop member provided on the lower surface side of the saddle portion, it is used without being limited to the material of the main pipe like an EF saddle type branch joint. be able to. Furthermore, since it is realizable only by connecting a saddle main body and a lower clamp, a branch joint can be comprised, without increasing a number of parts.

  In the branch joint according to the present invention, since the saddle part, the branch cylinder part, and the branch pipe connection part of the saddle body are integrated with the polyolefin resin, the branch part can be made flexible and corroded. The service life can be extended without worrying about In addition, since the junction between the branch pipe connecting portion and the branch pipe can be fused and integrated through an EF socket or the like, the saddle body is made of metal or the branch pipe connection portion is made of a metal screw-in type. It can be made superior in earthquake resistance. Furthermore, since the saddle body is mounted on the surface of the main pipe with a water stop member on the lower surface side of the saddle section, it can be used without being limited to the material of the main pipe like an EF saddle type branch joint. can do.

It is a top view of a branch joint concerning a 1st embodiment of the present invention. It is the XX sectional view taken on the line of FIG. It is the front view of the saddle main body which showed the saddle part in the cross section. It is a top view of an upper clamp. It is a top view of a lower clamp. It is a longitudinal cross-sectional view of the branch joint which concerns on 2nd Embodiment of this invention. It is the front view of the saddle main body which showed the saddle part of the branch joint which concerns on 2nd Embodiment of this invention in the cross section. It is a top view which shows the other form of a branch joint. It is a perspective view which shows the other form of a branch joint. It is a perspective view which shows the other form of a branch joint.

(First embodiment)
Hereinafter, the branch joint which concerns on 1st Embodiment of this invention is demonstrated using FIGS.

  The branch joint 100 according to the present embodiment includes a saddle body 1, an upper clamp 10, and a lower clamp 20. Here, it is shown as a branch joint 100 for branching out tap water from the main pipe P through which tap water flows. In FIG. 2, a branch tube portion 3 and a branch tube connection portion 4 described later included in the saddle body 1 are not cross-sectionalized in order to simplify the drawing. The same applies to FIGS. 3, 6 and 7 described later.

  The saddle body 1 is made of polyolefin resin such as polyethylene resin or polypropylene resin, and includes a saddle portion 2 that covers a part of the surface of the main pipe P, a branch cylinder portion 3 that is erected from the saddle portion 2, and a branch cylinder portion 3. The branch pipe connection part 4 branched from the side surface is provided, and these are integrally formed by resin molding.

  The saddle portion 2 is formed in an arc shape so that the cross section covers the surface of the upper half of the cross section circle of the main pipe P. Further, the length of the saddle portion 2, that is, the length along the axial direction of the main pipe P has such a size that the branch cylinder portion 3 can be sufficiently erected at a substantially central position in the length direction of the saddle portion 2. In general, the length is determined to be at least twice the diameter of the branch tube portion 3. Further, the thickness of the saddle portion 2 (thickness along the radial direction of the main pipe P) can sufficiently hold the branch tube portion 3 and is clamped from the upper surface side of the saddle portion 2 toward the lower surface (bottom surface). When the pressing force is applied by the above, it is determined that the pressing force can be sufficiently applied to the water stop member 6 described later provided on the lower surface of the saddle portion 2.

  A concave groove 5 is formed on the lower surface side of the saddle portion 2, and a water stop member 6 made of an elastic body such as synthetic rubber is provided so as to be partially accommodated in the concave groove 5. It has been. That is, the concave groove 5 is formed so as to surround the through-hole formed in the lower surface side of the saddle portion 2, that is, the side facing the surface of the main pipe P and where the branch tube portion 3 is located, A water stop member 6 is provided in the concave groove 5 so that a part thereof protrudes from the lower surface of the saddle portion 2.

  The branch cylinder portion 3 is formed of a cylindrical body that is erected so as to communicate with a through hole formed at a substantially central position on the upper surface of the saddle portion 2, and is configured integrally with the saddle portion 2 as described above. . The standing height of the branch cylinder portion 3 is determined by the length of a cylindrical seal plug (not shown) incorporated therein. That is, the standing height of the branch tube portion 3 is such that the seal plug moves upward, and the lower end portion of the seal plug is provided at approximately the middle of the height of the branch tube portion 3. When the position is slightly above the position, the upper end of the seal plug is determined not to protrude from the upper end of the branch tube portion 3.

  The inside of this branch cylinder part 3 is comprised similarly to the branch cylinder part of the well-known branch joint which incorporated the seal plug. An example of a well-known branch cylinder portion incorporating this seal plug is described in detail in the above-mentioned Patent Document 2 (Japanese Patent No. 5411964), and therefore will be briefly described here. That is, a female screw is formed on the inner wall of the branch cylinder portion 3 incorporating the seal plug, and a male screw type cylindrical seal plug is screwed into the female screw. When the seal plug rotates and moves in one direction to an opening Pa, which will be described later, opened in the main pipe P, the opening Pa is closed and the seal plug is moved in the other direction toward the upper end side of the branch tube portion 3. When rotating and moving, the opening Pa is opened and the inside of the main pipe P, the branch cylinder part 3 and the branch pipe connection part 4 are kept in communication.

  A seal cap 7 is provided on the upper part of the branch cylinder part 3. The seal cap 7 is configured so that it can be screwed onto and attached to the upper part of the branch cylinder part 3 and is configured to keep the inside of the branch cylinder part 3 watertight via a packing (not shown) when attached. ing.

  The branch pipe connecting portion 4 is formed of a cylindrical body projecting on a side wall that is approximately in the middle of the height of the branch cylinder portion 3, and is configured integrally with the saddle portion 2 and the branch cylinder portion 3, and is branched. The internal space of the cylinder part 3 and the internal space of the branch pipe connection part 4 are comprised in the communication state. The cylindrical diameter of the branch pipe connecting portion 4 is determined so that an EF socket or EF reducer (hereinafter referred to as “EF socket”) for connecting a branch pipe (not shown) can be inserted. The length of the cylinder is determined so that the EF socket can be sufficiently inserted.

  The upper clamp 10 is made of metal such as cast iron, and is configured to cover the upper surface of the saddle portion 2 of the saddle body 1 as shown in FIG. Therefore, the upper clamp 10 is formed in a semicircular cross section in the same manner as the saddle portion 2 having a semicircular cross section.

  Flange 10a is extended at both ends of the upper clamp 10 having a semicircular cross section. That is, the flange 10a is provided on both ends of the semicircle of the upper clamp 10 having a semicircular cross section, and the extending direction of the flanges 10a coincides with the line direction connecting both ends of the semicircle. It is provided to do.

  As shown in FIGS. 1 and 4, a cutout portion 11 is formed in the upper clamp 10. The notch portion 11 is formed at a position where the branch cylinder portion 3 and the branch pipe connection portion 4 are located when the upper clamp 10 is placed on the upper surface of the saddle portion 2. Therefore, the upper clamp 10 can be placed on the upper surface of the saddle portion 2 without interfering with the branch cylinder portion 3 and the branch pipe connection portion 4, and the workability of installing the branch joint 100 can be improved.

  Bolt holes 12 are formed in the flange 10 a of the upper clamp 10. That is, the bolt holes 12 are formed at predetermined intervals in the longitudinal direction of the flange 10a (when the upper clamp 10 is placed on the main pipe P, the axial center direction of the main pipe P). ing. In the example of FIG. 4, three bolt holes 12 are formed on the left side and two on the right side.

  The lower clamp 20 is made of a metal such as cast iron, and is formed in an arc shape (semicircular shape) so as to cover substantially the lower half of the cross-sectional circle of the main pipe P. That is, the lower clamp 20 is formed in an arc shape whose cross-sectional shape is curved opposite to the upper clamp 10, and the size of the lower clamp 20 is substantially the same as that of the upper clamp 10. The cut-out portion 11 is not formed.

  The lower clamp 20 is formed with a flange 20 a and a bolt hole 21. That is, the flange 20a is formed in the same size and shape as the flange 10a of the upper clamp 10, and the flange 20a is similar to the bolt hole 12 formed in the flange 10a of the upper clamp 10. Bolt holes 21 are formed. The flange 20a and the bolt hole 21 of the lower clamp 20 are determined so as to face the flange 10a and the bolt hole 12 of the upper clamp 10, respectively, as shown in FIG.

  Hereinafter, a procedure for mounting the branch joint 100 having the above configuration on the main pipe P will be described.

  First, the saddle body 1 is placed on the upper surface of the branch point of the main pipe P. For this placement, the water stop member 6 is set in advance in the recessed groove 5 provided on the lower surface side of the saddle portion 2.

  After the saddle body 1 is placed on the upper surface (front surface) of the main pipe P, the upper clamp 10 is placed on the upper surface side of the saddle portion 2 of the saddle body 1. When the upper clamp 10 is placed, the cutout portion 11 is formed in the upper clamp 10, so that even if the branch cylinder portion 3 and the branch pipe connection portion 4 exist, it can be easily performed.

  After the saddle body 1 and the upper clamp 10 are placed on the upper surface of the main pipe P, the lower clamp 20 is applied to the lower surface side of the main pipe P. Then, after aligning the bolt hole 21 of the flange 20a of the lower clamp 20 and the bolt hole 12 of the flange 10a of the upper clamp 10, the bolt 30a is inserted into the bolt hole, and the tip of the bolt 30a protruding from the bolt hole 12 The nut 30b is screwed into the part.

  By tightening the nut 30b, the water-stopping member 6 rich in elasticity housed in the groove 5 of the saddle portion 2 is pressed against the surface of the main pipe P. As a result, the saddle body 1 is mounted on the main pipe P in a state where the periphery where the branch cylinder portion 3 is located is kept watertight on the lower surface side of the saddle portion 2.

  Next, the opening Pa is opened by a well-known opening method at the location of the main pipe P on which the saddle body 1 is mounted. An example of the opening method is described in detail in paragraphs [0028] to [0036] of the specification of Patent Document 2 (Japanese Patent No. 5411964) described above, and will be briefly described here.

  In order to open the opening Pa at the location of the main pipe P, first, the seal cap 7 is removed from the branch cylinder part 3 and a seal plug (not shown) mounted in the branch cylinder part 3 is removed.

  After the seal cap 7 and the seal plug are removed, a drilling jig (not shown) is set in the branch cylinder portion 3, and an opening Pa is opened in the main pipe P using the drilling jig.

  After the opening Pa is opened in the main pipe P, the drilling jig is removed from the branch cylinder part 3 and a seal plug is screwed into the branch cylinder part 3, and the seal plug is located at the bottom of the branch cylinder part 3. It is rotated and moved in one direction. Thereby, the inflow of the water from the main pipe P into the branch cylinder part 3 is stopped.

  After the inflow of water from the main pipe P into the branch cylinder part 3 is stopped, one of the EF sockets (not shown) is inserted into the branch pipe connection part 4 and the branch pipe is inserted into the other of the EF sockets. Is done. Thereafter, by energizing the EF socket, the junction between the branch pipe connecting portion 4 and the branch pipe is fused and integrated through the EF socket.

  After the branch pipe connecting part 4 and the branch pipe are fused via the EF socket, the seal plug in the branch cylinder part 3 is rotated and moved in the other direction to the vicinity of the upper end part of the branch cylinder part 3, The lower end portion of the seal plug is positioned above the position of the branch pipe connecting portion 4 at the moving position. After the seal plug is moved, a seal cap 7 is attached to the upper portion of the branch cylinder portion 3. Thereby, the inside of the main pipe P, the inside of the branch cylinder part 3, and the inside of the branch pipe connection part 4 will be in a communication state, and the water of the main pipe P can be poured into a branch pipe.

  In the above-described branch joint 100 according to the present embodiment, the saddle portion 2, the branch tube portion 3, and the branch pipe connection portion 4 of the saddle body 1 are integrally made of polyethylene, so there is no concern about corrosion and the service life is increased. can do. In addition, since the junction between the branch pipe connecting portion 4 and the branch pipe is fused and integrated through the EF socket, it is possible to achieve excellent earthquake resistance as compared with the screw-in type. Furthermore, since the saddle body 1 is provided with a water stop member 6 on the lower surface side of the saddle portion 2 and placed on the upper surface of the main pipe P, the saddle body 1 is limited to the material of the main pipe P like an EF saddle type branch joint. As the main pipe P, a pipe made of a material different from that of the saddle body 1 such as a cast iron pipe, a ceramic pipe, a hard vinyl chloride pipe, and a glass fiber reinforced plastic pipe can be used.

(Second Embodiment)
The branch joint which concerns on 2nd Embodiment of this invention is demonstrated using FIG.6 and FIG.7.

  The branch joint 200 according to the second embodiment is different in that a flange 2a is provided in the saddle portion 2 of the branch joint 100 according to the first embodiment described above, and a bolt hole 2b is formed in the flange 2a. The other configurations are substantially the same as those in the first embodiment.

  The flange 2a is provided in the same manner as the flange 10a provided in the upper clamp 10. That is, the flange 2a is provided on both end sides of the semicircle of the saddle portion 2 having a semicircular cross section, and the extending direction of the flanges 2a coincides with the line direction connecting both end portions of the semicircle. It is provided to do. Then, as shown in FIG. 6, the positions of both ends of the flanges 2a coincide with the positions of both ends of the flange 10a provided on the upper clamp 10 and the flange 20a provided on the lower clamp 20, respectively. It is configured.

  A plurality of bolt holes 2b are formed at predetermined intervals in the longitudinal direction of the flange 2a (when the saddle portion 2 is placed on the main pipe P, the axial center direction of the main pipe P). Yes. The bolt holes 2b are provided so as to coincide with the positions of the bolt holes 12 formed in the flange 10a of the upper clamp 10 and the bolt holes 21 formed in the flange 20a of the lower clamp 20 (FIG. 6). reference).

  In the branch joint 200 having the saddle portion 2 configured as described above, the flange 2a of the saddle portion 2 is sandwiched between the flange 10a of the upper clamp 10 and the flange 20a of the lower clamp 20, so that the saddle body 1 is connected to the main pipe P. Support and fixation can be further strengthened.

  As mentioned above, although embodiment of the branch joint which concerns on this invention was described, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning. In addition, the constituent elements in the above-described embodiments can be appropriately replaced with known constituent elements without departing from the gist of the present invention.

For example, in the above-described example, the main pipe P is a water main, but the fluid flowing in the main pipe P may be a liquid or gas other than water.
In the above example, the upper clamp 10 and the lower clamp 20 are made of metal, but may be made of hard synthetic resin. Furthermore, since the lower clamp 20 only has to press the upper clamp 10 toward the main pipe P, a stopper such as a U bolt may be used as the lower clamp 20. Therefore, in the present invention, the term “lower clamp” includes a stopper that can press the upper clamp 10 toward the main pipe P.

Further, in order to prevent the cut surfaces of the main pipe P and the saddle portion 2 from coming into contact with tap water flowing through the main pipe P, the opening Pa connecting the main pipe P and the saddle portion 2 has an inner diameter of the opening Pa. A cylindrical protective member having an outer diameter that is substantially the same diameter as that may be inserted.
As another configuration of the upper clamp and the lower clamp, as shown in FIG. 8, the upper clamp 51 is formed in a band shape, and the saddle portion 2 is supported and fixed by being sandwiched between the upper clamp 51 and the lower clamp 20. It may be.
Further, in the second embodiment, the case where the flange 2a is formed on the saddle portion 2 has been described. However, as a configuration for supporting and fixing the saddle portion 2 on which the flange 2a is formed to the main pipe P, FIGS. It may be something like Specifically, in FIG. 9, the lower clamp 20 is the same as the above embodiment, but the upper clamp 52 is configured by a plate-like member that sandwiches the flange 2 a of the saddle portion 2 with the flange 20 a of the lower clamp 20. is there. Further, FIG. 10 employs a clamp in which the upper clamp 52 and the lower clamp flange 20a are connected by a connecting portion 53 and integrated in one flange portion in the configuration of FIG.

Moreover, in 2nd Embodiment, although it was set as the structure provided with the upper clamp 10, the upper clamp 10 was not used but the flange 2a provided in the saddle part 2 and the lower clamp 20 were connected using the volt | bolt 30a and the nut 30b. You may let them.
Furthermore, in this embodiment, although the case where a bolt was fastened in the location of a flange was demonstrated, you may fasten by methods other than a bolt. For example, it may be fastened with a resin band or the like (without metal fittings).

P Main pipe Pa opening 1 Saddle body 2 Saddle part 2a Flange 2b Bolt hole 3 Branch tube part 4 Branch pipe connection part 5 Groove groove 6 Water stop member 7 Seal cap 10 Upper clamp 10a Flange 11 Notch part 12 Bolt hole 20 Lower part Clamp 20a Flange 21 Bolt hole 30a Bolt 30b Nut

Claims (4)

A saddle portion mounted on the main pipe with a water-stopping member interposed therebetween, a branch cylinder portion integrally provided upright on the upper surface of the saddle portion, and a branch integrally protruding from the side wall of the branch cylinder portion A saddle body made of polyolefin resin having a pipe connecting portion,
An upper clamp placed so as to cover at least part of the surface of the saddle portion mounted on the main pipe;
A lower clamp arranged on the opposite side of the upper clamp via the main pipe and configured to be connectable to the upper clamp,
A branch joint configured to connect the upper clamp and the lower clamp to hold the saddle portion pressed against the main pipe.   The notch portion for preventing the upper clamp from interfering with the branch tube portion and the branch pipe connecting portion when the upper clamp is placed on the surface of the saddle portion. The branch joint described in 1.   The saddle portion is formed with a flange projecting radially outward of the main pipe when mounted on the main pipe, and the flange is used for connecting the upper clamp and the lower clamp to the flange. The branch joint according to claim 1, wherein a bolt hole is formed through which the bolt penetrates. A saddle portion mounted on the main pipe with a water-stopping member interposed therebetween, a branch cylinder portion integrally provided upright on the upper surface of the saddle portion, and a branch integrally protruding from the side wall of the branch cylinder portion A saddle body made of polyolefin resin having a pipe connecting portion and a flange extending to the side of the saddle portion;
A lower clamp arranged on the opposite side of the saddle body via the main pipe and configured to be connectable to the saddle body,
A branch joint configured to connect the saddle body and the lower clamp so as to hold the saddle portion pressed against the main pipe.

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