JP6588604B1 - Drainage pipe joint, drainage joint structure equipped with the same, and drainage stack pipe repair method - Google Patents

Abstract

Disclosed is a drainage pipe joint or the like in which a drainage channel can be easily formed in a residual drainage pipe and a new drainage standpipe and a residual drainage pipe can be easily connected. A drainage pipe joint is configured to constitute a drainage flow path instead of a residual drainage pipe OPa left in a floor slab S and to which a new drainage standpipe NP is connected, and is inserted into the residual drainage pipe OPa. An insertion pipe portion 11, a pipe joint portion 12 to which a new drainage standpipe NP is joined, and a seal member 15 interposed between the new drainage standpipe NP are provided. The fixed joint half 25 integrated with the part 11, the movable joint half 26 rotatably supported by the fixed joint half 25 via the hinge part 27, and the movable joint half 26 fixed to the fixed joint half And a fastening member 28 fastened to 25. [Selection] Figure 1

Description

  The present invention replaces the remaining drainage pipe that cuts the existing drainage stack at the upper side of the floor slab and leaves it on the floor slab, constitutes a drainage flow path in the remaining drainage pipe, and is newly established continuous to the upper side of the remaining drainage pipe The present invention relates to a drainage pipe joint to which a drainage pipe is connected, a pipe receiving joint, a drainage joint structure provided with these, and a method for repairing a drainage stack.

Conventionally, a slab through pipe replacement method for switching to a new pipe while leaving a slab through portion of an existing pipe is known (see Patent Document 1).
This replacement method includes a step of cutting and removing an existing pipe such as a drainage standpipe or a water supply standpipe penetrating the slab while leaving the slab penetrating part on the slab for a predetermined length, and an existing pipe left on the slab. Insert the tube made of synthetic resin into the inside, inflate the tube with air and bond the outer peripheral surface to the inner peripheral surface of the existing piping, and cut off the excess portion of the tube that protrudes from the existing piping after solidifying the bonded portion A step of removing, and a step of positioning a new pipe at a portion where the existing pipe is cut and removed, and connecting the existing pipe and the new pipe with a flange joint.
The existing piping to be left in the slab has a length that is three times the thickness of the slab so as to secure a length necessary for connecting new piping above and below the slab. Further, in the step of inflating and bonding the tube with air, the tube whose adhesive has been applied to the outer surface in advance is inserted into the existing piping and inflated, and the outer peripheral surface is adhered to the inner peripheral surface of the existing piping.

JP 2006-266374 A

In such a conventional method for replacing a slab through pipe, it is necessary to inflate the tube and adhere it to the inner peripheral surface of the existing pipe and maintain the inflated state until the adhesive is cured. For this reason, there is a problem that the equipment becomes large and the working time becomes long. In addition, when the tube is inflated, there is a problem that air bubbles (air pool) remain so as to be mixed into the adhesive, and a convex portion is generated on the inner peripheral surface of the tube. In particular, when this replacement method is applied to a drain pipe, not only does the convex portion of the tube cause clogging of the drain, but it may eventually be scraped off and the existing piping may be exposed.
On the other hand, the new pipe (new pipe) and the upper and lower existing pipes left on the slab are connected using joints, but the upper and lower existing pipes are fixed to the slab, so use a joint that takes the form of an insertion joint. I can't. In this regard, in the flange joint used in the conventional replacement method, the new pipe to which one flange is attached is slid from the side and joined. However, the other flange needs to be attached to the existing pipe by welding or the like, and there is a problem that the connection work of the new pipe becomes extremely complicated.

  The present invention provides a drainage pipe joint pipe, a pipe receiving joint, and a drainage pipe joint pipe capable of easily configuring a new drainage flow path in a residual drainage pipe left on a floor slab and easily connecting a new drainage stack It aims at providing the drainage joint structure provided with these, and the repair method of a drainage stack.

  The drainage pipe joint according to the present invention constitutes a drainage flow path in the residual drainage pipe instead of the residual drainage pipe that is cut off at a predetermined position above the floor slab and left on the floor slab. A drainage pipe joint to which a new drainage stand pipe connected to the upper side of the pipe is connected, inserted into the remaining drainage pipe from the upper side, and connected to the upper side of the insertion pipe part and the insertion pipe part constituting the drainage flow path. A pipe joint to which the vertical pipe is joined, and a seal member interposed between the new drainage vertical pipe in the pipe joint, and the pipe joint is divided in half along the axial direction and inserted One fixed joint half integrated with the pipe portion, the other movable joint half attached to the fixed joint half, and a fastening member for fastening the movable joint half to the fixed joint half It is characterized by.

  According to this configuration, a new drainage channel can be configured in the residual drainage pipe by inserting the insertion pipe portion into the residual drainage pipe. In addition, in the pipe joint, the new drainage stack is set to the pipe joint by sliding the new drainage stack from the side with the movable joint half not attached to the fixed joint half. Can do. Further, in this state, by fastening the movable joining half part to the fixed joining half part, the new drainage stack can be appropriately joined to the pipe joining part via the seal member. That is, a new drainage channel can be easily configured to the remaining drainage pipe, and a new drainage stack can be easily connected. Moreover, since a work space is not required below the pipe joint, the cutting position can be shortened as much as possible from the upper surface of the floor slab in the remaining drain pipe.

  In this case, the movable joint half is rotatably supported by the fixed joint half via the hinge portion at one butt end, and the fastening member fixes the movable joint half at the other butt end. It is preferable to fasten to the joining half.

  According to this configuration, since the movable joint half is rotatably supported via the hinge part with respect to the integrated insertion pipe part and the fixed joint half part, the joint of the newly constructed drainage stack to the pipe joint part Work can be done easily. In addition, it is possible to prevent the movable joint half from being lost during transportation or on-site delivery.

  In these cases, it is preferable that the upper end portion of the insertion pipe portion is formed in a funnel shape and welded to the fixed joining half portion.

  According to this configuration, the insertion pipe portion and the fixed joint half are integrated with each other in a state where the inner diameter of the insertion pipe portion and the inner diameter of the new drainage stack are substantially the same, and the joining allowance of the new drainage stack is secured. Can be

In this case, the pipe joint is disposed from welded portion insertion pipe portion is welded to the fixed joint halves on the upper side and the junction body established Drainage is Ru are bonded, downwardly from the junction body It is preferable to have a lower insertion portion from a welded portion that is extended and the upper end portion of the remaining drain pipe is relatively inserted.

  According to this configuration, not only can the newly constructed drainage stack be appropriately joined, but also the drainage pipe joint itself can be stably set to the remaining drainage pipe fixed to the floor slab via the swaging portion.

  In this case, the seal member is in close contact with the upper end portion of the insertion pipe portion at the lower end portion, and has a cylindrical seal interposed between the inner peripheral surface of the joint main body and the outer peripheral surface of the new drainage stack. It is preferable.

  According to this configuration, the cylindrical seal can appropriately seal between the new drainage stack and the insertion pipe portion, and can join the new drainage stack to the pipe joint without rattling. .

  In these cases, a drainage branch pipe is connected to the remaining drainage pipe in the vicinity of the upper side of the floor slab, and the insertion pipe portion is inserted in the state where the residual drainage pipe is relatively inserted into the swaging portion. It is preferable to have an opening at a position corresponding to the connection position.

  According to this configuration, with the drainage pipe joint set to the residual drainage pipe, the opening of the insertion pipe portion and the junction on the drainage branch pipe side (the junction of the joint and the junction drainage of the residual drainage pipe) match. . For this reason, an insertion pipe part and a drainage branch pipe can be made to communicate, without replacing | exchanging the coupling for connecting a drainage branch pipe to a remaining drainage pipe.

  The drainage joint structure of the present invention includes the above drainage pipe joint in which the insertion pipe part is inserted into the residual drainage pipe, and an insulating adhesive interposed between the residual drainage pipe and the insertion pipe part. It is characterized by that.

  According to this configuration, the drainage pipe joint can be firmly fixed to the remaining drainage pipe by the adhesive. Further, even if the insertion pipe portion and the remaining drain pipe are made of different metals, contact corrosion between metals can be prevented by the insulating adhesive.

  Another drainage joint structure of the present invention includes the above drainage pipe joint in which the insertion pipe part is inserted into the residual drainage pipe, an insulating adhesive interposed between the residual drainage pipe and the insertion pipe part, and an opening. And an adhesive removing member that is detachably set on the inner peripheral surface of the insertion pipe portion so as to close the portion, and that removes the adhesive facing the opening.

  According to this configuration, the drainage pipe joint can be firmly fixed to the remaining drainage pipe by the adhesive. Further, even if the insertion pipe portion and the remaining drain pipe are made of different metals, contact corrosion between metals can be prevented by the insulating adhesive. Furthermore, the adhesive removal member removes the adhesive facing the opening, so that the merging flow between the insertion pipe portion and the drainage branch pipe can be replaced without replacing the joint for connecting the drainage branch pipe to the remaining drainage pipe. A path can be easily formed.

  A method for repairing a drainage stack of the present invention is a method for repairing a drainage stack that uses the drainage pipe joint described above to repair an existing drainage stack, and the existing drainage stack is placed at a predetermined position above the floor slab and Cut and remove in the vicinity of the lower surface of the floor slab on the upper floor, leave the remaining drain pipe on the floor slab, and the inner peripheral surface of the remaining drain pipe corresponding to the inserted pipe part to be inserted Inserting the insertion pipe part into the remaining drain pipe while applying the insulating adhesive to the outer peripheral surface before the adhesive in the presetting process is cured, and the presetting process for applying the insulating adhesive. And a post-setting step for setting the drainage pipe joint to the remaining drainage pipe, and a standpipe connection step for joining the newly constructed drainage standpipe to the pipe joint of the drainage pipe joint.

  According to this configuration, the drainage pipe joint can be set in the residual drainage pipe while the adhesive applied to the residual drainage pipe and the adhesive applied to the insertion pipe portion are familiarized. Thereby, while being able to comprise a new drainage channel in a residual drainage pipe, a drainage pipe joint can be firmly fixed to a residual drainage pipe. Further, even if the insertion pipe portion and the remaining drain pipe are made of different metals, contact corrosion between metals can be prevented by the insulating adhesive. Furthermore, the newly installed drainage stack can be appropriately joined to the pipe joint through the seal member. That is, a new drainage channel can be easily configured to the remaining drainage pipe, and a new drainage stack can be easily connected.

  Another method for repairing a drainage stack according to the present invention is a method for repairing a drainage stack that uses the above-described drainage pipe joint to repair an existing drainage stack, and the existing drainage stack is set above a floor slab. The inner circumference of the remaining drainage pipe, corresponding to the pipe cutting / removal process where the drainage pipe is cut and removed near the lower surface of the floor slab at the position and the upper floor, and the remaining drainage pipe is left on the floor slab Inserting the insertion pipe into the remaining drain pipe while applying the insulating adhesive to the outer peripheral surface before the adhesive in the presetting process is cured, and applying the insulating adhesive to the surface. The post-set process for setting the drain pipe joint to the remaining drain pipe, and before the adhesive in the pre-set process and the post-set process hardens, the drain pipe joint opening was set to be closed from the inside Adhesive removal member Leaving an opening-communicating step Ri, a new drainage vertical tube, to a stand pipe connection step for joining the pipe section of the drain pipe joint, comprising the.

  According to this configuration, the drainage pipe joint can be set in the residual drainage pipe while the adhesive applied to the residual drainage pipe and the adhesive applied to the insertion pipe portion are familiarized. Thereby, while being able to comprise a new drainage channel in a residual drainage pipe, a drainage pipe joint can be firmly fixed to a residual drainage pipe. Further, even if the insertion pipe portion and the remaining drain pipe are made of different metals, contact corrosion between metals can be prevented by the insulating adhesive. Furthermore, the newly installed drainage stack can be appropriately joined to the pipe joint through the seal member. That is, a new drainage channel can be easily configured to the remaining drainage pipe, and a new drainage stack can be easily connected. In addition, it is possible to easily form a merging channel between the insertion pipe portion and the drainage branch pipe without exchanging a joint for connecting the drainage branch pipe to the remaining drainage pipe.

It is sectional drawing showing the drainage joint structure which concerns on 1st Embodiment of this invention. It is the perspective view (a) in the state where the movable junction part in a drainage pipe joint closed, and the perspective view (b) in the state where the movable junction part opened. It is the sectional view on the AA line in Fig.2 (a) of a drainage pipe coupling, and the sectional view on the BB line (b). It is a figure showing the procedure (a), the procedure (b), and the procedure (c) of the method for repairing a drainage stack according to the first embodiment. It is a figure showing the procedure (d), procedure (e), and procedure (f) of the repair method of the drainage stack which concerns on 1st Embodiment. It is sectional drawing showing the drainage joint structure which concerns on 2nd Embodiment. It is sectional drawing (a) and a top view (b) of a pipe receiving joint. It is a figure showing procedure (a), procedure (b), and procedure (c) of the repair method of the drainage stack concerning a 2nd embodiment. It is a figure showing the procedure (d), the procedure (e), and the procedure (f) of the method for repairing a drainage stack according to the second embodiment.

  Hereinafter, a drainage pipe joint according to an embodiment of the present invention, a pipe joint, a drainage joint structure including these, and a method for repairing a drainage stack will be described with reference to the accompanying drawings. This method for repairing drainage stacks is to repair existing drainage stacks (miscellaneous drainage pipes) in an old type existing apartment without slabs. The drainage standpipe in this case is exposed and exposed at the corner of the hall at the entrance of each dwelling unit. By leaving the slab penetration part of the drainage standpipe in the floor slab, the floor slab will be removed from the original floor. The work can be done without peeling off. In addition, this refurbishment method makes it possible to refurbish each floor of a drainage stack extending over a plurality of floors in consideration of the residents' intentions.

On the other hand, the drainage pipe joint and the pipe receiving joint have been developed as dedicated members used in this repair method. In addition, the drainage joint structure is a structure around the joint that aligns the drainage pipe joint and the pipe receiving joint with the existing drainage stand (remaining drainage pipe) left on the floor slab.
Hereinafter, the description will proceed in the order of the first embodiment and the second embodiment. The first embodiment uses only a drainage pipe joint, and the second embodiment uses a drainage pipe joint and a pipe joint. It is.

[First Embodiment]
FIG. 1 is a cross-sectional view showing a drainage joint structure. The existing drainage stand OP passes through the floor F and the floor slab S and is exposed on the floor F. In the illustrated example, the exposed portion of the existing drainage stand OP is replaced with the new drainage stand NP. In addition, it represents the state after renovation.

  As shown in the figure, a drainage branch pipe BP for draining a washing machine is connected to a gap between a floor F and a floor slab S in the existing drainage stand OP. That is, in the existing drainage stand OP of the floor, the drainage branch pipe BP for the washing machine of the floor is connected to the upper side of the floor slab S and the lower side of the floor via a branch joint BJ. Connected. In addition, the lower surface Sa of the floor slab S of the upper floor is the ceiling surface (straight sky) of the floor.

  The exposed portion of the existing drainage pipe OP is cut off near the lower surface Sa of the floor slab S on the upper floor, and the lower side is cut and removed on the upper side of the floor slab S, strictly on the upper side of the floor F. In the slab S, a residual drainage pipe OPa that is a part of the existing drainage stack OP is left. In this case, since the existing drainage stand OP is cut at a position of about 100 mm from the floor F (floor surface), the drainage branch pipe for the washing machine is connected to the remaining drainage pipe OPa via the existing branch joint BJ. The BP remains connected.

[Drainage joint structure]
As shown in FIGS. 1 to 3, the drainage joint structure 1 includes a drainage pipe joint 10 having an insertion pipe part 11 to be inserted into the remaining drainage pipe OPa and a pipe joint part 12 to which the new drainage stack NP is joined. And an insulating adhesive 13 interposed between the remaining drain pipe OPa and the insertion pipe portion 11. As will be described in detail later, the insertion pipe portion 11 of the drainage pipe joint 10 constitutes a drainage flow path connected to the new drainage standpipe NP, and the opening 53 (described later) formed in the insertion pipe portion 11 drains water. A merging channel that is continuous with the branch pipe BP is formed.

  The drainage pipe joint 10 is inserted into the remaining drainage pipe OPa from the upper side, and is connected to the insertion pipe part 11 constituting the drainage flow path and the upper side of the insertion pipe part 11, and the pipe joint part 12 to which the new drainage standpipe NP is joined. And a seal member 15 interposed between the new drainage stack NP in the pipe joint portion 12. Both the insertion pipe portion 11 and the pipe joint portion 12 are formed of stainless steel. The pipe joint portion 12 is formed in a cylindrical shape having a diameter larger than that of the insertion pipe portion 11, and the insertion pipe portion 11 is welded to the inner peripheral surface somewhat below the middle in the axial direction of the pipe joint portion 12. ing.

  In the pipe joint portion 12, a joint portion body 21 to which the new drainage standpipe NP is joined is formed on the upper side from the welded portion of the insertion pipe portion 11, and the upper end portion of the remaining drainage pipe OPa is relatively located on the lower side. The nail | claw part 22 inserted in is comprised. However, although details will be described, a reinforcing ring 56 is welded to the inner peripheral surface of the pipe joint portion 12 below the welded portion of the insertion pipe portion 11 (see FIG. 3). Therefore, in a strict sense, the ridge portion 22 is formed below the reinforcing ring 56.

  On the other hand, the cylindrical pipe joint 12 has a halved structure that is halved along the axial direction. Specifically, the pipe joint part 12 includes a fixed joint half part 25 integrated with the insertion pipe part 11 and a movable joint half part rotatably supported by the fixed joint half part 25 via a hinge part 27. 26 and a fastening member 28 for fastening the movable joining half 26 to the fixed joining half 25 (see FIG. 2).

  In this case, the fixed joint half 25 constitutes one half of the joint main body 21 and the swaging portion 22, but the movable joint half 26 constitutes the other half of the joint main body 21. At the same time, the other half of the swaging portion 22 is covered. That is, the swaging portion 22 includes a lower portion of the fixed joining half portion 25 and a half portion covering portion 29 provided so as to extend the lower portion in the circumferential direction. Therefore, when the movable joint half 26 is opened with respect to the fixed joint half 25, the joint body 21 is opened (see FIG. 2).

  The fixed joint half 25 includes a semi-cylindrical fixed half shell 31, a pin holding portion 32 that is connected to one end of the fixed half shell 31 and is bent into a small cylindrical shape, and a fixed half shell 31. And a pair of semi-annular pieces 33 projecting inwardly at both upper and lower ends. And the pin holding | maintenance part 32 is formed in the form which extends the upper part and lower part of one edge part of the fixed half part outer shell 31. As shown in FIG.

  Similarly, the movable joint half 26 includes a semi-cylindrical movable half shell 35, a pin engaging portion 36 that is connected to one end of the movable half shell 35 and is bent into a small cylindrical shape, and a movable half shell. And a pair of semi-annular pieces 37 projecting inwardly at the upper and lower ends of the outer shell 35. The pin engaging portion 36 is formed so as to extend an intermediate portion at one end of the movable half shell 35.

  In this case, the pin holding part 32 of the fixed joint half 25 is fixed with the hinge pin 39 at two places, the upper part and the lower part, and the pin engaging part 36 of the movable joint half 26 is an intermediate part of the hinge pin 39 at the intermediate part. Are rotatably engaged with each other. Thereby, the movable joining half 26 is rotatably supported by the fixed joining half 25. The pin holding portion 32, the pin engaging portion 36, and the hinge pin 39 constitute the hinge portion 27 described above.

  The pair of upper and lower semi-annular pieces 33 of the fixed joint half 25 and the pair of upper and lower semi-annular pieces 37 of the movable joint half 26 together with the fixed half outer shell 31 and the movable half outer shell 35 accommodate the seal member 15. It constitutes the housing. The inner contour circle formed by abutting the semi-annular piece 33 of the fixed joining half 25 and the semi-annular piece 37 of the movable joining half 26 is formed to have a larger diameter than the outer diameter of the newly formed drainage stack NP. When the movable joint half 26 is fastened to the fixed joint half 25, the seal member 15 is preferentially brought into contact with the new drainage stack NP.

  The fastening member 28 includes a nut-side rod 41 formed with two screw holes 42 at the top and bottom, and a nut-side holder 43 welded to the fixed joint half 25 (fixed half-part outer shell 31) while holding the nut-side rod 41. In addition, the upper and lower two bolts 44 that are screwed into the screw holes 42 of the nut side rod 41, the bolt side rod 45 that holds each of the two bolts 44 rotatably, and the bolt side rod 45 are held. And a bolt side holder 46 welded to the movable joining half 26 (movable half outline 35) (see FIG. 2 and FIG. 3A). The movable joint half 26 is rotated and pressed against the fixed joint half 25, and the two bolts 44 held by the bolt side rod 45 are screwed into the two screw holes 42 of the nut side rod 41, respectively. By doing so, the movable joint half 26 is fastened to the fixed joint half 25.

  In the pipe joint portion 12 of the present embodiment, the movable joint half 26 is rotatably supported with respect to the fixed joint half 25 via the hinge 27, but the fixed joint half 25 and the movable joint The half part 26 may be formed in a cross-section “Ω” shape, but this may be abutted and screwed (fastened) at the fixing pieces on both sides.

  The insertion pipe portion 11 is made of a thin stainless steel pipe having an outer diameter that is about 2 to 4 mm smaller than the inner diameter of an existing drainage stand OP made of a carbon steel pipe, and a part thereof is processed. In the embodiment, the existing drainage stand OP is constituted by a carbon steel pipe (white gas pipe) having a nominal diameter of 65A, and the insertion pipe portion 11 is constituted by a thin stainless steel pipe having a special dimension having an outer diameter of about 65 mm. ing. And the insertion pipe part 11 is integrally formed by the cylindrical pipe part main body 51 and the funnel-shaped part 52 which processed the upper end part of the pipe part main body 51 into the funnel shape (refer FIG. 3).

  Further, the pipe body 51 is formed with a circular opening 53 in front view corresponding to the merge opening OPaa of the remaining drain pipe OPa connected to the drain branch pipe BP. Furthermore, an adhesive removing member 54 for removing the adhesive facing the opening 53 is provided inside the pipe body 51 (see FIG. 3B). On the other hand, the length of the insertion pipe portion 11 is such that the lower end of the insertion pipe portion 11 (pipe portion main body 51) is in the state of the floor slab S in the residual drainage pipe OPa in a state where the drainage pipe joint 10 is inserted and set in the residual drainage pipe OPa. It is located within the range corresponding to the thickness (in the embodiment, the upper part) (see FIG. 1). Thereby, division is considered so that it may be construction of the dwelling unit of each floor.

  The insertion pipe portion 11 is welded to the inner peripheral surface of the fixed joining half 25 (fixed half outer shell 31) and the inner peripheral surface of the half covering portion 29 at the outer peripheral end of the funnel-shaped portion 52. In addition, an annular reinforcing ring 56 that reinforces the attachment of the insertion pipe portion 11 to the fixed joining half portion 25 is disposed immediately below the funnel-shaped portion 52. The reinforcing ring 56 is welded at the outer peripheral end to the inner peripheral surface of the fixed joining half 25 (fixed half outer shell 31) and the inner peripheral surface of the half covering portion 29, and the inner peripheral end is a pipe directly below the funnel-shaped portion 52. The main body 51 is welded to the outer peripheral surface. Thereby, the pipe junction part 12 and the insertion pipe part 11 are firmly integrated (refer FIG. 3).

  The opening 53 of the insertion pipe portion 11 is a state in which the reinforcing ring 56 is abutted against the upper end of the remaining drain pipe OPa via the insertion portion 22 (set state), and the merging opening OPaa (and the branch joint BJ). ) And the same axis. Moreover, the opening part 53 is formed in the same diameter as the diameter of the confluence | merging opening OPaa, and the internal diameter of the branch joint BJ (all refer FIG.3 (b)).

  Although details will be described later, the insertion pipe portion 11 is inserted and set in the remaining drain pipe OPa in a state where the adhesive 13 is applied to the outer peripheral surface of the pipe portion main body 51. At that time, the opening 53 is closed by the adhesive removing member 54 from the inside of the pipe body 51. The adhesive removing member 54 includes a resin patch sheet 61 that closes the opening 53 from the inside of the insertion pipe portion 11 (pipe portion main body 51), a pull-up string 62 having one end tied to the patch sheet 61, and the patch sheet 61. And a waste cloth 63 that holds down from the inside of the insertion pipe portion 11 (see FIG. 3B).

  The patch sheet 61 is formed slightly larger than the opening 53 and is made of a resin material to which the adhesive 13 easily adheres. The other end of the pulling string 62 is taken out of the drainage pipe joint 10 (fixed with gum tape or the like), and the patch sheet 61 is pulled up by pulling it upward. The waste cloth 63 is used as a stuffing and holds the patch sheet 61 so that the patch sheet 61 is not displaced when the adhesive 13 is applied to the insertion pipe portion 11 or when the insertion pipe portion 11 is inserted into the remaining drain pipe OPa. .

  Then, after the insertion pipe portion 11 is inserted and set in the remaining drain pipe OPa, before the adhesive 13 is cured, the patch sheet 61 to which the adhesive 13 is attached is removed, so that the opening 53 and the residual drain pipe OPa are removed. The merging opening OPaa is communicated, and at the same time, the drainage branch pipe BP is communicated via the branch joint BJ.

  The seal member 15 has a lower end abutted against the funnel-shaped portion 52 of the insertion pipe portion 11, and a cylindrical seal 66 interposed between the inner peripheral surface of the joint body 21 and the outer peripheral surface of the new drainage stack NP. ,have. The cylindrical seal 66 is formed by bending a thick rubber sheet having high elasticity (high elasticity) into a cylindrical shape, and one half in the circumferential direction is attached to the inner peripheral surface of the fixed joint half 25. The other half is attached to the inner peripheral surface of the movable joint half 26.

  That is, the cylindrical seal 66 is attached to one half attached to the portion corresponding to the joint main body 21 of the fixed joint half 25 and the portion corresponding to the joint main body 21 of the movable joint half 26. The other half is integrally formed. Further, both outer end portions of the cylindrical seal 66 are formed so as to be thin (half the thickness of other portions) with a stepped portion, and can be overlapped with each other. When the movable joint half 26 is fastened to the fixed joint half 25, both end portions of the cylindrical seal 66 are overlapped, and at the same time, the inner peripheral surface of the cylindrical seal 66 is connected to the new drainage standpipe NP and the lower end surface of the cylindrical seal 66. Are in close contact with the funnel-shaped portion 52. Thereby, the space | interval between the junction part main body 21 of the pipe junction part 12 and the newly installed drainage stack NP is sealed. The seal member 15 may be a combination of an annular seal that is in direct contact with the funnel-like portion 52 and a cylindrical seal 66 that is abutted against the annular seal.

  Reference numeral 68 in the drawing is a spacer. The spacer 68 is formed of the same material and the same thickness as the cylindrical seal 66, and has the same shape as the cylindrical seal 66, and is a sandwiched portion of the pipe joint 12. 22 is attached. As described above, the sandwiched portion 22 includes the lower portion of the fixed joining half portion 25 and the half portion covering portion 29 provided so as to extend the lower portion in the circumferential direction, and the spacer 68 is fixed. It is accommodated in the swaging portion 22 so as to follow the lower inner peripheral surface of the joining half portion 25 and the inner peripheral surface of the half covering portion 29. For this reason, the spacer 68 is in intimate contact with the outer peripheral surface of the remaining drain pipe OPa fitted into the squeezed portion 22. Thereby, when the insertion pipe part 11 is inserted in the residual drain pipe OPa, the insertion pipe part 11 is immovably engaged with the residual drain pipe OPa and positioned coaxially.

  The adhesive 13 is composed of a two-pack type epoxy resin adhesive. This adhesive 13 has a function of fixing the insertion pipe part 11 (drainage pipe joint 10) to the remaining drainage pipe OPa and a function of insulating the insertion pipe part 11 and the remaining drainage pipe OPa for corrosion protection. Yes. Although details will be described later, the adhesive 13 is applied to the inner peripheral surface of the remaining drain pipe OPa and the outer peripheral surface of the insertion pipe portion 11, and the adhesive 13 is inserted when the insertion pipe portion 11 is inserted into the residual drain pipe OPa. I try to get them to know each other. As a result, the adhesive 13 is filled in the gap between the insertion pipe portion 11 and the remaining drain pipe OPa.

  Needless to say, the adhesive 13 is also sufficiently applied to the swaging portion 22 including the upper end surface of the remaining drain pipe OPa and the lower surface of the reinforcing ring 56. The adhesive 13 is also applied to the upper end of the spacer 68 in the squeezed portion 22, and an insulating layer made of the insulating adhesive 13 is formed between the drain pipe joint 10 and the remaining drain pipe OPa. Will be.

[Renovation Method of First Embodiment]
Here, with reference to FIG. 4 and FIG. 5, the repair method of a drainage stack is demonstrated. This repair method is based on the premise that the existing drainage stack OP extending over a plurality of floors is not repaired at once, but only the existing drainage stack OP on the corresponding floor is repaired.

  The method of repairing the drainage stack is to cut and remove the existing drainage stack OP at a predetermined position above the floor slab S and near the lower surface Sa of the floor slab S on the upper floor, and leave the remaining drain pipe OPa on the floor slab S. Pipe cutting / removing process, pre-setting process for applying insulating adhesive 13 to the inner peripheral surface of the remaining drain pipe OPa, and insertion of the drain pipe joint 10 before the adhesive 13 is cured in the presetting process. A post-setting step of inserting the pipe 11 into the residual drain pipe OPa while applying an insulating adhesive 13 to the outer peripheral surface thereof, and setting the drain pipe joint 10 to the residual drain pipe OPa; Before the adhesive 13 in the process is cured, the opening communication step for removing the adhesive removing member 54 of the drainage pipe joint 10 and the newly formed drainage stack NP are joined to the pipe joint 12 of the drainage pipe joint 10. It includes a standpipe connecting step.

  In the pipe cutting / removal process, for example, using a Saber saw SS, the existing drainage stand OP is cut at a position of about 100 mm from the floor F, and is cut at a position of about 30 mm from the lower slab (ceiling surface). , Remove. Thereby, the remaining drain pipe OPa is left in a state of passing through the floor slab S. After that, cleaning including deburring of the cut end (upper end) of the remaining drain pipe OPa and removal of rust on the remaining drain pipe OPa is performed.

  In the presetting process, a long paint rod PP is used, and the adhesive 13 is applied to the inner peripheral surface of the remaining drain pipe OPa. In this case, the adhesive 13 is applied so that coating unevenness does not occur on the inner peripheral surface of the remaining drain pipe OPa. Also, care should be taken so that the adhesive 13 does not enter the merged opening OPaa of the remaining drain pipe OPa connected to the branch joint BJ. This coating operation is preferably performed by attaching a funnel-like hopper to the upper end portion of the remaining drain pipe OPa (not shown). Thereby, the floor surface is prevented from being contaminated by the dripping of the adhesive 13, and the adhesive 13 is prevented from adhering to unnecessary portions. And before this adhesive 13 hardens | cures, ie, immediately after this process, it transfers to the following process rapidly.

  In the post setting process, the insertion pipe portion 11 is inserted into the residual drain pipe OPa while repeating the application of the adhesive 13 having a predetermined dimension from the tip of the insertion pipe portion 11 and the insertion into the residual drain pipe OPa having a predetermined dimension. go. The predetermined dimension in this case is preferably about 50 mm, and consideration is given so as not to cause uneven coating. In the final stage of the process, the adhesive 13 is also applied to the upper end of the remaining drain pipe OPa and the squeezed portion 22 of the pipe joint portion 12, and the drain pipe joint 10 is set to the remaining drain pipe OPa. In this case also, the process immediately proceeds to the next step before the adhesive 13 is cured, that is, immediately after this step.

  In the opening communicating step, first, the waste 63 of the adhesive removing member 54 is removed. Next, the pulling string 62 is pulled, and the patch sheet 61 is pulled up. Here, the state of the opening 53 is confirmed using a mirror or an endoscope. When the residue of the adhesive 13 adheres to the opening 53, it is removed with the above-described coating stick PP or the like. Then, after the adhesive 13 is cured, the process proceeds to the next step.

  In the pipe connecting step, a new drainage stack NP cut at the site is prepared, and the upper end of the new drainage stack NP is first inserted into the upper joint JJ and temporarily tightened (see FIG. 1). Subsequently, the movable joint half 26 is opened, and the lower end portion of the new drainage stack NP is slid from the side so as to abut against the fixed joint half 25. Here, the movable joint half 26 is closed, and the two bolts 44 are temporarily tightened. Finally, the upper joint JJ and the drain pipe joint 10 are finally tightened.

  As described above, according to the first embodiment, when the drainage pipe joint 10 is set in the residual drainage pipe OPa, a new drainage flow is introduced into the residual drainage pipe OPa by the insertion pipe portion 11 inserted into the residual drainage pipe OPa. A road can be constructed. Further, by sliding the new drainage standpipe NP from the side, the new drainage standpipe NP can be set to the pipe joint 12, and in this state, the movable joint half 26 is fastened to the fixed joint half 25. By doing so, the new drainage stack NP can be appropriately joined to the pipe joint 12 via the seal member 15. That is, a new drainage flow path can be easily configured in the remaining drainage pipe OPa, and a new drainage stack NP can be easily connected.

  On the other hand, the drainage pipe joint 10 can be firmly fixed to the residual drainage pipe OPa by the insulating adhesive 13 interposed between the insertion pipe portion 11 and the residual drainage pipe OPa. In addition, the insulating adhesive 13 can effectively prevent contact corrosion that occurs between the insertion pipe portion 11 that is a different metal and the remaining drain pipe OPa. Further, by removing the adhesive 13 facing the opening 53 by the adhesive removing member 54, the insertion pipe portion 11 can be replaced without replacing the branch joint BJ for connecting the drainage branch pipe BP to the remaining drainage pipe OPa. And the drainage branch pipe BP can be easily formed.

  In the present embodiment, it is assumed that the drainage branch pipe BP is connected to the remaining drainage pipe OPa. However, when there is no such drainage branch pipe BP, in the insertion pipe portion 11 of the drainage pipe joint 10 The opening 53 and the adhesive removing member 54 are not necessary. In the repair method, the opening communication step is not necessary.

[Second Embodiment]
As described above, the drainage stack of the first embodiment is repaired in units of units on each floor in principle. On the other hand, after the repair of the floor using the drainage pipe joint 10 is completed, the downstairs may be repaired. In such a case, the floor slab S has a pipe corresponding to the drainage pipe joint 10 on the lower side. A receiving joint 70 (described later) is installed. The renovation of the floor using the drainage pipe joint 10 and the renovation of the downstairs using the pipe receiving joint 70 may be performed continuously or may be performed over time. In any case, the drainage pipe joint 10 and the pipe receiving joint 70 are closely related to the remaining drainage pipe OPa left in the floor slab S.

  Therefore, the mutual structural relationship among the residual drain pipe OPa, the drain pipe joint 10 and the pipe receiving joint 70 will be described as the drain joint structure 1A of the second embodiment, and a modification including this relation will be described in the second embodiment. This will be explained as a method of repairing the drainage stack. However, since the relationship between the residual drain pipe OPa and the drain pipe joint 10 has been described in the first embodiment, the relationship between the residual drain pipe OPa and the pipe receiving joint 70 will be mainly described in detail below.

[Pipe receiving joint]
As shown in FIGS. 6 and 7, the drainage joint structure 1 </ b> A of the second embodiment includes a pipe receiving joint 70 below the floor slab S.

  The pipe receiving joint 70 includes a joint pipe 71 inserted into the remaining drain pipe OPa from below, a bottom plate ring 72 that is supported in a state where the joint pipe 71 penetrates, and that faces the lower end of the residual drain pipe OPa, A cylindrical cover 73 that supports the bottom plate ring 72 and covers the exposed portion of the residual drain pipe OPa under the slab, and supports the cylindrical cover 73, and the bottom drain ring OPa penetrates the lower surface Sa of the floor slab S with the residual drain pipe OPa passing therethrough. And a fixed plate 74 to be fixed.

  The joint pipe 71, the bottom plate ring 72, the cylindrical cover 73, and the fixed plate 74 are all made of stainless steel, and are welded together to be integrated. The tube receiving joint 70 may be an integrated unit of these components by screws or rivets.

  The joint pipe 71 is composed of a stainless steel pipe that is one size down from the existing drainage stack OP, similarly to the insertion pipe portion 11 described above. Although details will be described later, an insulating adhesive 13 is interposed between the outer peripheral surface of the joint pipe 71 and the inner peripheral surface of the remaining drain pipe OPa. The upper part of the joint pipe 71 has such a length that the upper end faces the lower end of the insertion pipe part 11 in a state where the pipe receiving joint 70 is fixed to the floor slab S (see FIG. 6).

  As described above, the lower end of the insertion pipe portion 11 of the drainage pipe joint 10 reaches the position corresponding to the upper part of the floor slab S in the remaining drainage pipe OPa. On the other hand, the upper end of the joint pipe 71 reaches a position near the lower end of the insertion pipe portion 11 in the remaining drain pipe OPa. On the other hand, the lower part of the joint pipe 71 has such a length that a joint JJ interposed between the newly formed drainage stack NP can be connected.

  The bottom plate ring 72 is a ring-shaped plate member, and an inner peripheral end surface is welded to the intermediate portion outer peripheral surface of the joint pipe 71 and an outer peripheral end surface is welded to the lower end of the cylindrical cover 73. In a state where the pipe receiving joint 70 is fixed to the floor slab S, the bottom plate ring 72 faces the lower end surface of the remaining drain pipe OPa. Although details will be described later, an insulating adhesive 13 is interposed between the upper surface of the bottom plate ring 72 and the lower end surface of the remaining drain pipe OPa. The residual drain pipe OPa may not be firmly fixed to the floor slab S due to corrosion or the like, and the bottom plate ring 72 prevents rattling of the residual drain pipe OPa and displacement of the floor slab S.

  The cylindrical cover 73 is formed in a cylindrical shape so as to cover the exposed portion under the slab of the remaining drain pipe OPa, and the lower end thereof is welded to the bottom plate ring 72 and the upper end is welded to the opening edge of the fixed plate 74. In a state where the tube receiving joint 70 is fixed to the floor slab S, the cylindrical cover 73 supports the joint tube 71 via the bottom plate ring 72. Although details will be described later, an insulating adhesive 13 is interposed in the gap between the inner peripheral surface of the cylindrical cover 73 and the outer peripheral surface of the remaining drain pipe OPa.

  The fixed plate 74 is formed in a square planar shape, and a round hole portion 76 into which the remaining drain pipe OPa is loosely inserted is formed at the center (see FIG. 7B). The upper end of the cylindrical cover 73 is welded to the opening edge on the lower surface of the fixed plate 74 in which the round hole 76 is formed. In addition, small holes 77 (burst holes) for screwing are formed at the four corners of the fixing plate 74. Although details will be described later, the fixing plate 74 is screwed to the base plate 81 through the four small holes 77, and the base plate 81 is fixed to the floor slab S (see FIG. 6).

  As shown in FIG. 6, the drainage joint structure 1 </ b> A is interposed between the base plate 81 fixed to the lower surface of the floor slab S, the base plate 81, and the fixed plate 74 in addition to the pipe receiving joint 70. And an elastic sheet 82. Also, the drainage joint structure 1A is elastic between the residual drainage pipe OPa and the joint pipe 71, between the residual drainage pipe OPa and the bottom plate ring 72, between the residual drainage pipe OPa and the cylindrical cover 73, and with the fixing plate 74. Insulating adhesives 13 interposed between the base plate 81 and the sheet 82 are further provided.

  The adhesive 13 in this case is also composed of a two-pack type epoxy resin adhesive as in the first embodiment. The adhesive 13 has a function of integrating the residual drain pipe OPa and the pipe receiving joint 70, and the residual drain pipe OPa, which is a dissimilar metal, while sealing between the residual drain pipe OPa and the pipe receiving joint 70. It also has a function of preventing rusting of contact corrosion with the tube receiving joint 70.

  The base plate 81 is formed in a square shape in plan view, and has an insertion opening 84 in which the remaining drain pipe OPa is loosely inserted in the center (see FIG. 8B). The base plate 81 is made of stainless steel and is formed in a shape that is slightly larger than the fixed plate 74. At the four corners of the base plate 81, four fixing holes 86 (burr holes) for anchoring and four screw holes 87 for screwing are formed. The base plate 81 is fixed to the lower surface Sa of the floor slab S through four fixing holes 86 by a post-construction anchor 88, and the fixing plate 74 is screwed to the base plate 81 through four screw holes 87.

  As will be described in detail later, the lower surface Sa of the floor slab S is finished with a clean shot and then primed with a primer. Since the base plate 81 has a sufficient size, it absorbs unevenness occurring on the lower surface Sa of the floor slab S in combination with the ground treatment. In addition, when the attachment of the base plate 81 becomes unstable due to extreme unevenness, it is preferable to interpose a rubber sheet between the base plate 81 and the lower surface Sa of the floor slab S.

  The elastic sheet 82 is made of a highly elastic resin having an adhesive layer on one of the front and back surfaces (with an adhesive). The outer shape of the elastic sheet 82 is almost the same as that of the fixed plate 74, but the corner is largely cut and a circular opening 89 is formed in the center (see FIG. 8C). The elastic sheet 82 is attached to the base plate 81 before the tube receiving joint 70 is attached to the floor slab S.

  Although details will be described later, the elastic sheet 82 in this case mainly has a function of correcting the posture of the tube receiving joint 70 and a function of imparting vibration proofing to the tube receiving joint 70. In the former function, when the fixing plate 74 is screwed to the base plate 81, the elasticity of the elastic sheet 82 is used to allow the joint pipe 71 to be tightened and adjusted with a screw so as to be in a horizontal posture. .

  Note that the planar shape of the fixing plate 74, the elastic sheet 82, and the base plate 81 may be circular or the like, and is preferably determined appropriately in consideration of the properties of the mounting surface, obstacles, and the like.

[Renovation method of the second embodiment]
Next, with reference to FIG. 8 and FIG. 9, the repair method of the drainage stack which has the pipe | tube receiving joint 70 as a main body is demonstrated. As described above, this repair method includes a repair method mainly composed of the drainage pipe joint 10 in the upper floor, but here, the repair method mainly composed of the drainage pipe joint 10 has been completed, and the explanation will be given. Proceed.

  This drainage stack refurbishment method includes a pipe cutting step (see FIG. 8A) for cutting the remaining drainage pipe OPa in the vicinity of the lower surface Sa of the floor slab S, and a lower surface Sa of the floor slab S from the fixed plate 74. The base fixing step (see FIG. 8B) for fixing the large base plate 81 in a state where the remaining drain pipe OPa passes therethrough, and the inner pipe surface of the remaining drain pipe OPa corresponding to the joint pipe 71 to be inserted. First application step (see FIG. 8C) for applying the insulating adhesive 13, the outer peripheral surface of the joint pipe 71 above the bottom plate ring 72, the upper surface of the bottom plate ring 72, and the inner peripheral surface of the cylindrical cover 73 And the second application step (see FIGS. 9D and 9E) for applying the insulating adhesive 13 to the upper surface of the fixing plate 74, and the adhesive 13 in the first application step and the second application step. Joy before curing And at the same time insert the door pipe 71 leaving the drainage pipe OPa, includes a tube receiving mounting step screwing the fixing plate 74 to the base plate 81 while interposing the elastic sheet 82 (see FIG. 9 (f)), a.

  In the pipe cutting process, the existing drainage stand OP is cut at a position of about 30 mm below the slab using a Saber saw SS (see FIG. 8A). In this case as well, cleaning including deburring of the lower end (cut end) of the remaining drain pipe OPa and removal of rust on the remaining drain pipe OPa is performed. However, in the above-described tube cutting / removing step, this can be omitted when the cleaning is completed.

  In the base fixing step, first, a corresponding portion of the lower surface Sa of the floor slab S is finished with a clean shot, and a primer is brushed on the finished surface, and the ground treatment of this portion is performed. After waiting for the primer to dry, using the pattern with the remaining drain pipe OPa as a reference, markings for anchors are made at four places, and pilot holes for anchors are drilled with a vibration drill or the like. Subsequently, a post-construction anchor 88 is driven into the prepared hole to fix the base plate 81 (see FIG. 8B).

  At this time, it is preferable to attach the elastic sheet 82 to the base plate 81. However, the elastic sheet 82 may be attached to the fixed plate 74 before the second application step. In such a case, the adhesive 13 is applied to the fixed plate 74 including the elastic sheet 82 in the second application step.

  In the first application step, the coating agent PP is used, and the adhesive 13 is applied from the lower side to the inner peripheral surface of the remaining drain pipe OPa (see FIG. 8C). In this case, the adhesive 13 is applied so that coating unevenness does not occur on the inner peripheral surface of the remaining drain pipe OPa from the back of the pipe toward the front. In particular, when the adhesive 13 is applied in the vicinity of the lower end of the insertion pipe 11, care is taken so that the adhesive 13 does not adhere to the inner peripheral surface of the insertion pipe 11. And before this adhesive 13 hardens | cures, ie, immediately after this process, it transfers to the following process rapidly.

  In the second application step, the outer peripheral surface of the joint pipe 71 above the bottom plate ring 72, the upper surface of the bottom plate ring 72, the inner surface of the cylindrical cover 73, and the upper surface of the fixed plate 74, that is, the remaining drain pipe OPa in the tube receiving joint 70 are confronted. The adhesive 13 is applied to the entire area of the portion to be applied and the entire upper surface of the fixing plate 74 (see FIG. 9D). Prior to the second application step, the joint pipe 71 is cut off as necessary.

  In the tube receiver mounting step, first, the tube receiver joint 70 coated with the adhesive 13 is brought into the ceiling portion. Here, the joint pipe 71 of the pipe receiving joint 70 is positioned and inserted into the remaining drain pipe OPa. Also in this case, the joint pipe 71 is inserted into the residual drain pipe OPa while repeating the application of the adhesive 13 having a predetermined dimension from the tip of the joint pipe 71 and the insertion into the residual drain pipe OPa having a predetermined dimension (FIG. 9 (e)).

  In the final stage of the insertion, the fixing plate 74 is aligned with the base plate 81. The fixing plate 74 is screwed (screwed) to the base plate 81 while pressing the fixing plate 74 against the base plate 81 (see FIG. 9F). In this screwing operation, four screws are temporarily fixed, and each screw is tightened and adjusted so that the joint pipe 71 is in a vertical posture (final tightening). By this tightening adjustment, the elastic sheet 82 is appropriately compressed, the fixing plate 74 is in a horizontal posture, and the joint pipe 71 is in a vertical posture.

  In the set state in which the tube receiving joint 70 is fixed to the base plate 81, the upper end of the joint pipe 71 is close to the lower end of the insertion pipe portion 11. However, the adhesive 13 is sufficiently wound around this portion. Then, the adhesive 13 that protrudes inward from the upper end of the joint pipe 71 is removed by the coating stick PP.

  As described above, according to the second embodiment, when the fixing plate 74 is fixed to the lower surface Sa of the floor slab S via the base plate 81, the joint pipe 71 is connected to the lower end of the insertion pipe portion 11 in the remaining drain pipe OPa. The top ends are close and face each other. Thus, a new drainage flow path is configured by the insertion pipe portion 11 and the joint pipe 71 instead of the remaining drainage pipe OPa. In this state, since the bottom plate ring 72 faces the lower end surface of the residual drain pipe OPa, the residual drain pipe OPa may not be firmly fixed to the floor slab S due to corrosion or the like. In addition, it is possible to prevent rattling of the remaining drain pipe OPa and displacement of the floor slab S.

  On the other hand, since the residual drain pipe OPa and the joint pipe 71 are integrated by the adhesive 13 and the pipe receiving joint 70 is supported by the floor slab S, the residual drain pipe OPa and the pipe receiving joint 70 are connected to the floor slab S. It can be firmly supported. Further, the insulating adhesive 13 can effectively prevent contact corrosion between the joint pipe 71 and the remaining drain pipe OPa, which are different metals. In addition, the elastic sheet 82 can give the tube receiving joint 70 vibration-proof properties, and the tube receiving joint 70 can have an appropriate mounting posture.

  DESCRIPTION OF SYMBOLS 1,1A ... Drainage joint structure, 10 ... Drainage pipe joint, 11 ... Insertion pipe part, 12 ... Pipe joint part, 13 ... Adhesive, 15 ... Sealing member, 21 ... Joint part main body, 22 ... Insertion part, 25 ... Fixed joint half, 26 ... movable joint half, 27 ... hinge part, 28 ... fastening member, 39 ... hinge pin, 44 ... bolt, 51 ... pipe body, 52 ... funnel-like part, 53 ... opening, 54 ... adhesion Agent removing member, 66 ... cylindrical seal, 70 ... pipe receiving joint, 71 ... joint pipe, 72 ... bottom plate ring, 73 ... cylindrical cover, 74 ... fixed plate, 81 ... base plate, 82 ... elastic sheet, BP ... drainage branch Pipe, BJ ... Branch joint, F ... Floor, NP ... New drainage stack, OP ... Existing drainage stack, OPa ... Remaining drainage pipe, OPaa ... Confluence opening, S ... Floor slab, Sa ... Bottom

Claims (10)

Instead of the remaining drainage pipe cut off the existing drainage stack at a predetermined position above the floor slab and left on the floor slab, a drainage flow path is formed in the remaining drainage pipe, and a new installation connected to the upper side of the remaining drainage pipe A drainage pipe joint to which a drainage stack is connected,
Inserted into the residual drain pipe from above, an insertion pipe portion constituting the drain flow path,
A pipe joint that is connected to the upper side of the insertion pipe part and to which the new drainage stack is joined,
In the pipe joint, a seal member interposed between the new drainage stack, and
The pipe joint is
Half fixed along the axial direction, and one fixed joint half integrated with the insertion pipe part, and the other movable joint half attached to the fixed joint half;
And a fastening member that fastens the movable joint half to the fixed joint half. The movable joint half is rotatably supported by the fixed joint half via a hinge part at one butt end,
The drain pipe joint according to claim 1, wherein the fastening member fastens the movable joint half to the fixed joint half at the other butted end.   The drain pipe joint according to claim 1 or 2, wherein an upper end portion of the insertion pipe portion is formed in a funnel shape and is welded to the fixed joining half portion. The pipe joint is
Wherein arranged from welded portions on the upper side of the insertion pipe portion is welded to the fixed joint half, and a junction body in which the newly Drainage is Ru are bonded,
4. A lower insertion portion extending from the welded portion, and extending downward from the joint main body, into which the upper end of the remaining drain pipe is relatively inserted. The drainage pipe joint described in 1.   The seal member has a cylindrical seal interposed between the inner peripheral surface of the joint main body and the outer peripheral surface of the new drainage stack while being in close contact with the upper end of the insertion pipe at the lower end. The drainage pipe joint according to claim 4, wherein the drainage pipe joint is provided. A drainage branch pipe is connected to the remaining drain pipe near the upper side of the floor slab,
The insertion pipe portion has an opening at a position corresponding to a connection position of the drainage branch pipe in a state in which the remaining drainage pipe is relatively inserted into the insertion portion. The drainage pipe joint according to 4 or 5. The drainage pipe joint according to any one of claims 1 to 5, wherein the insertion pipe part is inserted into the remaining drainage pipe,
A drainage joint structure comprising: an insulating adhesive interposed between the remaining drainage pipe and the insertion pipe portion. The drainage pipe joint according to claim 6, wherein the insertion pipe part is inserted into the remaining drainage pipe,
An insulating adhesive interposed between the remaining drain pipe and the insertion pipe part;
A drainage joint comprising: an adhesive removing member that is detachably set on an inner peripheral surface of the insertion pipe portion so as to close the opening, and removes the adhesive facing the opening Construction. A drainage stack repair method for repairing the existing drainage stack using the drainage pipe joint according to any one of claims 1 to 5,
Cutting and removing the existing drainage pipe at a predetermined position above the floor slab and in the vicinity of the lower surface of the upper floor slab, and a pipe cutting / removing step for leaving the remaining drain pipe on the floor slab;
A presetting step of applying an insulating adhesive to the inner peripheral surface of the remaining drain pipe in correspondence with the insertion pipe portion to be inserted,
Before the adhesive in the presetting process is cured, the insertion pipe portion is inserted into the residual drain pipe while applying an insulating adhesive to the outer peripheral surface thereof, and the drain pipe joint is inserted into the residual drain pipe. A post-setting process for setting the tube;
A method for repairing a drainage stack, comprising: a standpipe connection step for joining the new drainage stack to a pipe joint of the drainage pipe joint. A drainage stack repair method for repairing the existing drainage stack using the drainage pipe joint according to claim 6,
Cutting and removing the existing drainage pipe at a predetermined position above the floor slab and in the vicinity of the lower surface of the upper floor slab, and a pipe cutting / removing step for leaving the remaining drain pipe on the floor slab;
A presetting step of applying an insulating adhesive to the inner peripheral surface of the remaining drain pipe in correspondence with the insertion pipe portion to be inserted,
Before the adhesive in the presetting process is cured, the insertion pipe portion is inserted into the residual drain pipe while applying an insulating adhesive to the outer peripheral surface thereof, and the drain pipe joint is inserted into the residual drain pipe. A post-setting process for setting the tube;
Before the adhesive in the pre-setting step and the post-setting step is cured, an opening communicating step of removing the adhesive removing member set so as to close the opening of the drainage pipe joint from the inside;
A method for repairing a drainage stack, comprising: a standpipe connection step for joining the new drainage stack to a pipe joint of the drainage pipe joint.

Images