JP2007046288A - Pipe connecting joint device and connecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint device and a connecting structure capable of sufficiently exhibiting flexibility and water cut-off performance even if a branch pipe is displaced, by preventing the branch pipe from being pushed into a main pipe. <P>SOLUTION: This joint device 1 is provided. The joint device 1 is used for connecting a drilled hole 2A of the main pipe 2 and the branch pipe 3. The joint device 1 has a water cut-off flexible joint 4 and a pipe receiving member 5. The water cut-off flexible joint 4 has a cylindrical part 4A inserting the branch pipe 3 and fixed to an outer peripheral surface of the branch pipe 3, a collar part 4B fixed by externally covering the periphery of the drilled hole 2A of the main pipe 2 and a connecting part 4C connecting these parts. The pipe receiving member 5 has a plurality of supports 5A installed in the drilled hole 2A of the main pipe 2 and a branch pipe receiving base 5B supported by the respective supports 5A and receiving the branch pipe 3 so that at least one of tilting and the sideways movement can be performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joint device for connecting a branch pipe to a drilling portion of a main pipe, and a connection structure including the main pipe, a branch pipe, and a joint device, particularly in a rainwater pipe or a sewage pipe buried underground. The present invention relates to a joint device used in connecting a main pipe and a branch pipe. In particular, the present invention relates to a connection between a main pipe having a large diameter and a branch pipe.

  Conventionally, for connecting the main pipe and the branch pipe, a method of placing concrete and winding it up has been performed. However, with this method, if the relative position of the main pipe and branch pipe is displaced due to ground subsidence or earthquake distortion, the concrete winding part will be cracked or destroyed, leading to unknown water intrusion or sewerage. There was a defect that water leakage occurred.

  Recently, even when the relative positions of the branch pipe and the main pipe are displaced, rubber flexible joints have been proposed that can absorb the displacement and maintain the water stoppage. However, when the mounting angle of the branch pipe is vertical or steep, the branch pipe is subjected to a load due to earth pressure, a live load from the vehicle, a load due to an earthquake or ground displacement, and the branch pipe is pushed into the main pipe. There is a risk of obstructing the flow of the tube. Proposals have been made as countermeasures against this indentation load (see, for example, Patent Documents 1 and 2).

  The thing of patent document 1 and 2 is demonstrated with reference to FIG. 11 and 12 are longitudinal sectional views showing a conventional main pipe and branch pipe connection structure. The thing of patent document 1 is a structure which connects the attachment pipe 102 to the attachment hole 101A of the sewage main pipe 101, as shown in FIG. 11, Comprising: The receiving port 103, the flexible connection pipe 104, the leg 105, The receiving port 103 has a fitting portion 103A with the lower end 102A of the mounting tube 102 and a connecting portion 103B with the mounting hole 101A, and the flexible connecting tube 104 has a connecting portion with the receiving port 103. 103B and the mounting hole 101A are connected, and the leg body 105 is interposed between the outer periphery of the receiving port 103 and the outer surface of the sewage main pipe 101 and is responsible for the load applied to the receiving port 103. It is the connection structure of a pipe and an attachment pipe.

  Such a proposal is to reliably prevent the lower end of the mounting pipe from protruding into the sewage main pipe even when a protruding load is applied to the mounting pipe, and to maintain the sewage flow smoothly over a long period of time.

As shown in FIG. 12, Patent Document 2 is one in which a mounting pipe 202 or the like is connected to a main pipe 201, a plurality of leg portions 204 for holding a branch pipe 203 in a mounting port 201 A of the main pipe 201, and an attachment An example is shown in which a bonding agent 206 provided in a gap 205 between a port 201A and a branch pipe 203 is characterized, and a mounting pipe 202 is connected to an upper end opening 203A of the branch pipe 203 via a cylindrical rubber joint 207. In this proposal, the displacement between the attachment pipe and the branch pipe can be absorbed by the rubber joint.
JP 2003-3557 A JP 2003-184161 A

  Patent Document 1 has a complicated structure and high cost, and the rubber connecting pipe is connected to a receiving port fixed by a leg, so that it has water-stopping property but follows the displacement of the mounting pipe. There is a defect that has almost no sex.

  In the case of Patent Document 2, the displacement between the mounting pipe and the branch pipe can be absorbed by the rubber joint, but the connection between the main pipe and the branch pipe is rigidly joined with a non-shrinkable mortar or an epoxy adhesive, If the branch pipe is displaced due to an earthquake or ground displacement, there is a disadvantage that the joint is destroyed and groundwater, earth and sand, etc. enter.

  The present invention has been devised in order to solve the above-described problems. The object of the present invention is to prevent the branch pipe from being pushed into the main pipe and to be flexible even if the branch pipe is displaced. It is to provide a joint device and a connection structure that can sufficiently exhibit water-stopping properties.

  The present invention is a joint device for connecting a branch pipe to a drilling portion of a main pipe, comprising a flexible waterproof joint member and a pipe receiving member, wherein the waterproof joint member includes a branch pipe. A cylindrical portion that is inserted and fixed to the outer peripheral surface of the branch pipe, a flange portion that covers and fixes the periphery of the drill hole portion of the main tube from the outside, and a connecting portion that connects between the cylindrical portion and the flange portion. The pipe receiving member includes a plurality of supports attached to a drilling portion of a main pipe, and a branch pipe that is supported by each of the supports and receives the branch pipe so that at least one of tilting and lateral movement is possible. The present invention relates to a joint device including a receiving member and a connection structure using the joint device.

  The joint device of the present invention includes a pipe receiving member attached to a drilling portion of a main pipe, and the pipe receiving member is supported by a support so as to receive the branch pipe so that at least one of tilting and lateral movement is possible. A branch pipe holder is provided, and the branch pipe and main pipe are prevented from being pushed into the main pipe even when the branch pipe and main pipe are pushed or displaced due to an earthquake or ground subsidence as in the past. It is possible to provide a connection structure that follows the displacement of at least one of tilting and lateral movement of the branch pipe.

  The purpose of preventing the branch pipe connected to the main pipe from being pushed in due to an earthquake or the like is achieved with a minimum number of parts and without sacrificing the flexibility between the main pipe and the branch pipe.

(1) (Main pipe, branch pipe)
The main and branch pipes can be selected as connection targets, such as rainwater pipes and sewage pipes buried underground, as expected from large-diameter pipes and multiple small-diameter pipes connected to them. It is. The pipe | tube assumed from the pipe | tube connection structure that the fluid from a several pipe | tube is collected on one pipe | tube may be sufficient. The difference in diameter between the main pipe and the branch pipe is not particularly limited, but in general, the diameter of the main pipe is larger than that of the branch pipe. The connection angle of the tube is not particularly limited.

(2) (Fitting device)
The joint device for connecting the branch pipe to the hole drilling portion of the main pipe can be composed of a flexible water-stop joint member and a pipe receiving member. A flexible water-stop joint member is an essential member that exhibits flexibility and water-stop in a joint device, and is a main body of the joint. The pipe receiving member mainly works to prevent the branch pipe from being pushed into the main pipe, while the vertical and horizontal directions of the branch pipe (the pipe axis direction of the main pipe is taken as the vertical direction) or the rear direction (branch pipe). It works to allow displacement in the direction in which the direction is pushed forward.

(3) (Waterproof joint member)
Usually, it is used as a connection joint. Various flexible joints can be used. In addition, a known flexible joint can be used as long as it does not cause a problem in the flexibility of the connection structure, water stoppage, or the like. The flexible water-stop joint member can include a cylindrical portion, a flange portion, and a connecting portion that connects them.

  The cylindrical part can insert a branch pipe inside, and at least one part thereof is fixed to the outer peripheral surface of the branch pipe. The cylindrical shape mainly means a cylindrical shape, but also includes a shape that can follow the outer shape of the branch pipe. A fastening band or the like can be used for fixing the cylindrical portion to the branch pipe. The collar portion covers and fixes the periphery of the main drilling portion from the outside of the connection portion. Various means such as a rigid cover member, a band, and an adhesive can be used for fixing the collar portion. The eaves part can have a water-stopping layer that adheres and stops water around the hole-cutting part.

  Flexible water-stop joint body is made of styrene / butadiene rubber, synthetic rubber such as EPDM (ethylene / propylene / diene terpolymer), CR (chloroprene rubber), natural rubber, soft vinyl chloride resin, vinyl chloride elastomer, styrene It can be formed by selecting at least one material selected from the group consisting of thermoplastic elastomers and the like.

  Fastening band, rigid cover and band materials such as stainless steel, aluminum, rust-proof plated steel, rust-proof steel materials, vinyl chloride resin, ABS (acrylonitrile butadiene styrene) resin, PET (polyethylene terephthalate), etc. At least one material selected from the group consisting of hard plastics, fiber reinforced plastics such as FRP (glass fiber reinforced plastics), and the like can be used. Each of these materials is desirable because it is difficult to corrode.

  The water-stopping layer is made of adhesive materials such as butyl rubber and rubber ashes, water-expandable seal materials such as water-expandable rubber, urethane, epoxy and silicone materials such as seal materials, caulking materials and adhesives. Can be used. A butyl rubber-based sealing material is desirable from the viewpoints of adhesiveness and waterstop.

(4) (Pipe receiving member)
It can consist of a plurality of supports and a branch receiver. The support is attached to the main drilling. The branch pipe receiver is supported by each support and receives the insertion end of the branch pipe to prevent the branch pipe from being pushed into the main pipe.

  The support body can be composed of at least one pair, and each support body can be attached to an opposing position of the drilling portion of the main pipe. The support can have a wall locking part or the like, and can thereby be attached to the inner surface of the drilling part of the main pipe. The support body can have a portion for receiving a branch pipe receiver, for example, a branch pipe cradle receiving part, preferably a groove part, whereby the branch pipe receiver can be received.

  The branch pipe receiver receives the branch pipe so that the insertion end of the branch pipe is not pushed into the main pipe, and is movable so that at least one of tilting and lateral movement of the branch pipe is possible.

  The movable branch tube receiver can be realized by a combination of a support and a branch tube receiver. For example, the movable branch tube receiver is achieved by a support body having a groove portion and a branch tube receiver having a protrusion portion loosely fitted in the groove portion.

  The branch pipe receiver can be formed of an annular member for preventing the branch pipe from being pushed into the main pipe. The annular member can be formed of a cylindrical body or the like, and includes an inner protrusion that supports the insertion end of the branch pipe, preferably an inner flange, and an outer protrusion that is loosely fitted in the groove of the support. Yeah. The annular member may be a branch pipe cradle, and the branch pipe cradle includes a cylindrical body having an inner projecting portion that supports an insertion end portion of the branch pipe, and a support body locking portion supported by the support body.

  The branch pipe receiver is supported by the support so that the insertion end of the branch pipe is not pushed into the main pipe, while the vertical and horizontal directions of the branch pipe (the pipe axis direction of the main pipe is the vertical direction) or the rear Displacement in the direction (with the direction in which the branch pipe is pushed in as the forward direction) is allowed.

  When a pair of supports are mounted in the main tube drilling direction in the main pipe drilling portion, the lateral displacement of the branch pipe is determined by the width of the groove at the outer protrusion of the branch pipe holder at the groove portion of the support. The displacement of the branch pipe in the vertical direction is allowed by moving the outer protrusion of the branch pipe holder in the vertical direction of the groove in the groove portion of the support.

  The material of the pipe receiving member such as the support, the branch pipe holder, etc. can prevent the branch pipe from being pushed into the main pipe. The same material as the fastening band described above may be used. That is, at least one selected from the group consisting of metals such as stainless steel, aluminum, rust-proof plated steel, and rust-proof steel, vinyl chloride resin, ABS resin, hard plastics such as PET, fiber reinforced plastics such as FRP, etc. Material can be used. Each of these materials is desirable because it is difficult to corrode.

(5) (Connection structure)
The main pipe, the branch pipe, and the joint device as described above are provided. It is obtained by connecting a branch pipe to the drilling part of the main pipe through the above-described joint device. The joint device includes a flexible water-stop joint member and a pipe receiving member. The water-stop joint member includes a cylindrical portion, a flange portion, and a connecting portion that connects them. The tube receiving member includes a plurality of supports and a movable branch tube receiver. Such a connection structure becomes a watertight structure and can prevent the branch pipe from being pushed into the main pipe, while at least one of tilting and lateral movement of the branch pipe is possible.

  The connection structure can be constructed by the following method. Attach the support of the pipe receiving member to the drilling part of the main pipe, receive the branch pipe receiving of the pipe receiving member with the support, and from the outside of the main pipe so that the drilled part is covered with the flange part of the water stop joint member The branch pipe is inserted into the cylindrical portion of the water stop joint member, at least one part of the cylindrical portion is fixed to the outer peripheral surface of the branch pipe, and the branch pipe receiver tilts and / or moves sideways. Try to receive at least one of them as possible.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a connection structure using a joint device according to an example of the present invention. FIG. 2 is a longitudinal sectional view of the connection structure of FIG. 1 cut along the tube axis direction of the main pipe. FIG. 3 is a top view of the connection structure of FIG. FIG. 4A is a longitudinal sectional view of one example of the tube receiving member, and FIG. 4B is a top view of the tube receiving member of FIG.

  Fig.5 (a) is a longitudinal cross-sectional view of an example flexible water-stopping joint member, (b) is a top view of the joint member of (a). FIG. 6 is a cross-sectional view of the joint member of FIG. FIG. 7 is a longitudinal cross-sectional view showing the attachment procedure of the tube receiving member. FIG. 8 is a top view showing the attachment procedure of the tube receiving member of FIG. FIG. 9 is a front view of an example support. FIG. 10 is a longitudinal sectional view showing a relative displacement between the main pipe and the branch pipe.

  One example of the joint device is shown in FIGS. The joint device 1 is used to connect the drilling hole 2 </ b> A of the main pipe 2 and the branch pipe 3. The joint device 1 includes a water stop flexible joint 4 and a pipe receiving member 5. The waterproof joint 4 includes a cylindrical portion 4A in which the branch pipe 3 is inserted and fixed to the outer peripheral surface of the branch pipe 3, a flange portion 4B that covers and fixes the periphery of the hole 2A of the main pipe 2 from the outside, and And a connecting portion 4C for connecting the two. The pipe receiving member 5 includes a plurality of supports 5A attached to the drilling holes 2A of the main pipe 2, and branches that are supported by the respective supports 5A and receive the branch pipe 3 so that at least one of tilting and lateral movement is possible. A tube cradle 5B.

  As shown in FIGS. 1 and 2, a pipe receiving member 5 having a support 5A provided in a drilling hole 2A of a main pipe 2 and a branch pipe cradle 5B made of a movable cylindrical body is connected to a water-stoppable joint 4. The branch pipe 3 is inserted into the pipe receiving member 5 through the water stop flexible joint 4, and the branch pipe 3 and the water stop flexible joint 4 are fixed by the fastening band 6. As shown in detail in FIG. 2, the water stop flexible joint 4 is provided with a water stop layer 7 between the flange 4 </ b> B and the outer surface of the main pipe 3.

  As shown in detail in FIGS. 2 and 4, the support 5A has a wall locking part 5C and a branch pipe cradle receiving part 5D, and the branch pipe cradle 5B includes a cylindrical body 5E and a support locking part. 5F, the branch pipe pedestal 5B is supported by the support 5A by the support body locking portion 5F, and the support 5A can hold the load received by the branch pipe cradle 5B. FIG. 4 shows a longitudinal sectional view and a top view of the pipe receiving member, and a support locking part 5F provided on the cylindrical body 5E of the branch pipe support 5B is provided on the wall locking part 5C of the support 5A. The state latched by the branch pipe receiving part 5D is shown.

  5 and 6 show a longitudinal sectional view, a top view, and a transverse sectional view of a water-stopper flexible joint. The water stop flexible joint 4 includes a cylindrical portion 4A, a flange portion 4B, and a connecting portion 4C connecting them, and a water stop layer 7 is provided over the entire periphery of the flange portion 4B. The water-stopping layer 7 is preferably a butyl rubber-based sealing material that can satisfy adhesiveness and water-stopping properties.

  7 and 8 are a longitudinal sectional view and a top view showing how to attach the tube receiving member 5. First, a support 5A having a branch pipe cradle receiving part 5D and a wall locking part 5C is attached to the drilling hole 2A of the main pipe 2. Next, as a movable branch pipe pedestal 5B, a support locking part 5F provided in a cylindrical body 5E for receiving the branch pipe is inserted into the branch pipe cradle receiving part 5D and attached.

  FIG. 9 is a front view showing in detail a state in which the branch pipe cradle receiving part of the support is viewed from the center side of the drilling part. As shown in FIG. 9, the support 5A includes a wall locking portion 5C and a branch pipe receiving part 5D, and the branch pipe receiving part 5D includes a groove 8 that forms a recess. As shown in FIG. 8 and the like, the branch pipe cradle 5 </ b> B has a support locking part 5 </ b> F that forms a convex part, and the support locking part 5 </ b> F is inserted into the groove 8. The width of the groove 8 is designed to be larger than the width of the support locking portion 5F of the branch pipe support 5B, and the support lock portion 5F of the branch pipe support 5B is loosely inserted into the groove 8.

  FIG. 10 is a longitudinal sectional view showing a state when a bending displacement θ is generated in the branch pipe with respect to the main pipe. It can be seen that even in the displaced state, the branch pipe 3 can be prevented from being pushed into the main pipe 2. Further, the branch pipe 3 is inserted and fixed to the movable branch pipe pedestal 5B of the pipe receiving member 5, but the pipe receiving member 5 follows the tilting displacement of the branch pipe 3 and can stop water. The joint 4 also follows the displacement.

  As is clear from the above description, the joint device of the present invention has the branch pipe even when the branch pipe and the main pipe are pushed or displaced due to an earthquake or ground subsidence in the connection between the branch pipe and the main pipe. It is possible to prevent the main pipe from being pushed into the main drilling hole, and the flexible water stop joint that covers the movable pipe receiving member and the pipe receiving member from the outer surface of the main pipe prevents the branch pipe from being pushed into the main pipe. While being able to prevent, the connection structure which follows the displacement of the branch pipe tilt and / or the lateral movement can be provided.

It is a longitudinal cross-sectional view of the connection structure using the coupling apparatus of one example of this invention. It is a longitudinal cross-sectional view which cut | disconnects the connection structure of FIG. 1 in the pipe-axis direction of a main pipe. It is a top view of the connection structure of FIG. (A) is a longitudinal cross-sectional view of one example of the tube receiving member, and (b) is a top view of the tube receiving member of (a). (A) is a longitudinal cross-sectional view of one example of a flexible waterproof joint member, (b) is a top view of the joint member of (a). It is AA sectional drawing of the joint member of FIG.5 (b). It is a longitudinal cross-sectional view which shows the attachment point of a pipe receiving member. It is a top view which shows the attachment point of a pipe receiving member. It is a front view of the support body of an example. It is a longitudinal cross-sectional view which shows the relative displacement between a main pipe and a branch pipe. It is a longitudinal cross-sectional view which shows the connection structure of the conventional main pipe and branch pipes. It is a longitudinal cross-sectional view which shows the connection structure of the other conventional main pipe and branch pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint apparatus 2 Main pipe 2A Drilling hole 3 Branch pipe 4 Water stop flexible joint 4A Cylindrical part 4B Gutter part 4C Connection part 5 Pipe receiving member 5A Support body 5B Branch pipe stand 5C Wall latching part 5D Branch pipe stand holder Part 5E Cylindrical body 5F Support body locking part 6 Fastening band 7 Water stop layer 8 Groove

Claims (4)

  A joint device for connecting a branch pipe to a bore portion of a main pipe, comprising a flexible water-stopping joint member and a pipe receiving member, wherein the water-stopping joint member is inserted into the branch pipe. A tubular portion that is fixed to the outer peripheral surface of the tube, a flange that covers and fixes the periphery of the drilling portion of the main pipe from the outside, and a connecting portion that connects between the cylindrical portion and the flange. The receiving member includes a plurality of supports attached to the drilling portion of the main pipe, and a branch pipe receiver supported by each of the supports so as to receive at least one of tilting and lateral movement of the branch pipe. A coupling device characterized by that.   The support has a groove, the branch pipe receiver is made of an annular member, and the annular member includes an inner protrusion that supports an end of the branch pipe, and an outer protrusion that is loosely fitted in the groove of the support. The joint device according to claim 1, comprising:   The joint device according to claim 1, wherein the flange portion has a water stop layer that adheres to the periphery of the drilled portion and stops water.   A connection structure in which a main pipe, a branch pipe, and a joint device are provided, and the branch pipe is connected to a drilled portion of the main pipe via the joint device, and the joint device is a flexible water-stop joint member And the water-stopping joint member includes a tubular portion, a flange portion, and a connecting portion that connects between the tubular portion and the flange portion, the tube receiving member, A plurality of supports and a movable branch pipe receiver, wherein the branch pipe is inserted into the cylindrical portion of the water stop joint member, and at least one part of the cylindrical portion is an outer periphery of the branch pipe Fixed to the surface, and the flange portion of the water stop joint member is fixed so as to cover the periphery of the hole portion of the main pipe from the outside, and each support body of the pipe receiving member is a hole portion of the main pipe Each support body supports a branch pipe receiver of the pipe receiving member, and the branch pipe receiver tilts the branch pipe and causes little lateral movement. Connecting structure, characterized in that both have received as 1-way that is possible.

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