JP6267632B2 - Drainage drain member, joint member and drainage structure repair method - Google Patents

Description

  The present invention relates to a drainage drain member, a joint member, and a method for repairing a drainage structure provided on a roof or a balcony.

  As shown in FIG. 6, there is a conventional drainage structure in which a lower end portion of a drainage drain 110 installed at a drainage port 101 of a floor 100 is connected to a lower drainage pipe 102. The drainage drain 110 is formed by integrating a bowl-shaped waterproof sheet connecting portion 111 and a tubular pipe connecting portion 112. A diameter-changing portion 113 whose diameter is reduced downward is integrally formed at the lower end portion of the pipe connection portion 112. In such a drainage structure, the waterproof sheet connecting part 111 and the pipe connecting part 112 may be deteriorated due to secular change, and the sealing performance may be deteriorated. As a method for repairing the drainage structure, a method of installing a repair drain (new waterproof drain) 120 inside the drainage drain 110 is known. The repair drain 120 is formed by integrating a bowl-shaped waterproof sheet connecting portion 121 and a bellows tube portion 122. The bellows tube portion 122 is formed to have a smaller diameter than the pipe connection portion 112 and extends to the lower end portion of the variable diameter portion 113. By setting it as such a structure, the repair drain 120 can be installed, utilizing the connection part of the waterproof sheet connection part 111 and the waterproof sheet 103. FIG.

  As a configuration similar to this, there was a drain structure described in Patent Document 1. This drain structure includes a first drain member connected to the drain pipe and a second drain member inserted inside thereof. Both the first drain member and the second drain member have a flange portion and a cylindrical portion. The cylinder part of the 2nd drain member is inserted in the state which does not contact the inner side of the cylinder part of the 1st drain member. The second drain member is replaced at the time of repair. By setting it as such a structure, the replacement | exchange operation | work of a 2nd drain member can be performed easily and rapidly at the time of repair.

JP 2011-58169 A

  The drainage structure of FIG. 6 and the drain structure of Patent Document 1 both have a gap between the inner insertion pipe and the outer pipe, so that when the backflow or clogging occurs in the drainage pipe and a full pipe condition occurs In some cases, drainage flows into the gap between the existing drainage drain and the repair drainage. When drainage flows into the gap between the existing drainage drain and the renovation drainage, the drainage flows around the deteriorated waterproof sheet connecting part 111 and the connection part between the waterproof sheet connecting part 111 and the pipe connecting part 112. There was a problem of flooding the building side of the building.

  On the other hand, in the conventional drainage structure shown in FIG. 6, the bellows tube portion 122 of the repair drain 120 is inserted into the pipe connection portion 112 of the drainage drain 110, so the diameter of the drainage channel is significantly reduced. Accordingly, the drainage capacity is greatly reduced. In recent years when hourly rainfall is increasing, the decline in drainage capacity is a problem.

  On the other hand, when the waterproofing technology advances, the waterproof material such as waterproof sheet has a longer useful life than the drainage drain, and the drainage drain is removed at the time of repair. Therefore, the performance of the highly durable waterproof sheet cannot be fully utilized. This is a problem that occurs in the drain structure of Patent Document 1 in which the second drain member is replaced every time refurbishment is performed. In the drainage structure shown in FIG. 6, the existing drainage drain 110 can be left in the first renovation. However, if the renovation is performed a plurality of times, the diameter of the drainage channel is reduced every time the renovation is performed. There is a limit of one renovation by inserting a renovation drain. Therefore, in the second renovation, the drainage drain 110 and / or the renovation drain 120, or both, must be removed.

  Therefore, the present invention has been made to solve the above-mentioned problems, and while being able to use a connection portion between an existing drainage drain and a waterproof layer while suppressing a decrease in drainage capacity, the existing drainage drain and a repair drain It is an object of the present invention to provide a drainage drain member, a joint member, and a method for repairing a drainage structure that can prevent drainage from flowing into a gap with the drainage.

  The present invention for solving the above-mentioned problems is a drainage drain member provided with a piping part that connects a drainage port and a drainage pipe, and an inner surface of the piping part is provided with a modified drain support part that projects inward. The modified drain support part is formed over the entire circumference of the inner surface of the piping part, and has a support surface with which the tip surface of the modified drain to be mounted at the time of repair comes into contact. It is a drain member.

According to such a configuration, since the watertight connection can be performed by bringing the tip surface of the repair drain into contact with the support surface of the repair drain support portion, the drainage into the gap between the existing drainage drain and the repair drain can be performed. Inflow can be prevented. As a result, it is possible to prevent the drainage from flowing into the deteriorated portion, so that the water is not flooded into the building side of the building from the gap caused by the deterioration.
Furthermore, since a pre-made PVC pipe is used instead of the bellows pipe as the repair drain in order to contact the repair drain support part, the reduction in the diameter of the drainage channel is suppressed as compared with the conventionally used bellows pipe. be able to. Therefore, an existing drainage drain member can be used while suppressing a decrease in drainage capacity.

  In the drainage drain member according to the present invention, the repair drain support part is provided in a plurality of stages, and the repair drain support part located on the drain pipe side among the plurality of repair drain support parts is the drain port. What protrudes inward rather than the repair drain support part located in the side is preferable. According to such a configuration, it is possible to perform a plurality of repairs without re-constructing the periphery of the drainage port of the waterproof layer while suppressing a decrease in drainage capacity. Therefore, the drainage structure can be improved by taking advantage of the performance of the highly durable waterproof sheet.

  Furthermore, in the drainage drain member according to the present invention, the pipe part includes a pipe body and a joint member that connects the pipe body to the drain pipe, and the repair drain support part is provided in the joint part. It may be what is provided. Even with such a configuration, the same effects as those described above can be obtained.

  Further, the present invention is a tubular joint member used for a drainage drain member that connects a drain port and a drain pipe, and an inner surface is provided with a pipe body support portion and a repair drain support portion that project to the inside. The pipe body support portion is formed over the entire circumference of the inner surface, and has a pipe support surface with which a tip end surface of the pipe body connected to the drain port contacts, and the repair drain support portion is The joint member is formed over the entire circumference of the inner surface, and has a support surface with which a front end surface of a repair drain to be mounted at the time of repair comes into contact. If the drainage drain member provided with the joint member having such a configuration is used, the same function and effect as those described above can be obtained.

  Furthermore, the present invention is a method for repairing a drainage structure formed by connecting a drain outlet and a drain pipe with a drainage drain member, and an inner surface of the drainage drain member is provided with a repair drain support portion projecting inward. The modified drain support portion is formed over the entire circumference of the inner surface of the drainage drain member, and the first modified drain is inserted into the drainage drain member from the drainage port side, The front end surface of the renovation drain is brought into contact with the support surface of the renovation drain support part to perform watertight connection, and then the water around the drain side end of the first renovation drain is stopped. This is a drainage structure renovation method.

According to such a method, since the tip surface of the repair drain and the support surface of the repair drain support portion can be watertightly connected, it is possible to prevent the drainage from flowing into the gap between the existing drainage drain and the repair drain. As a result, it is possible to prevent the drainage from flowing into the deteriorated portion, so that the water is not flooded into the building side of the building from the gap caused by the deterioration.
Further, since the ready-made PVC pipe is used as the repair drain instead of the bellows pipe, the reduction in the diameter of the drainage channel can be suppressed as compared with the bellows pipe. Accordingly, it is possible to suppress a decrease in drainage capacity.

  Furthermore, in the drainage structure repairing method according to the present invention, the repair drain support part is provided in a plurality of stages, and the repair drain support part located on the drain pipe side among the plurality of repair drain support parts is The second drain is inserted into the first repair drain from the drain port side, and the second repair drain is inserted into the first repair drain from the drain port side. The front end surface of the second repair drain is brought into contact with the support surface of the modified drain support portion located on the drain pipe side to make a watertight connection, and then the periphery of the drain port side end portion of the second modified drain is stopped. It is preferable to water. According to such a method, since the repair can be performed twice without reconstructing the periphery of the drain outlet of the waterproof layer, the drainage structure can be repaired taking advantage of the performance of the highly durable waterproof sheet. . Furthermore, even if the repair is performed twice, the decrease in drainage capacity can be suppressed.

  According to the drainage drain member and the drainage structure repair method according to the present invention, it is possible to prevent the drainage from flowing into the gap between the existing waterproof layer and the repair waterproof layer while suppressing a decrease in drainage capacity.

It is sectional drawing which showed the state which installed the drainage drain member which concerns on embodiment of this invention in the floor part. It is the disassembled perspective view which showed the drainage drain member which concerns on embodiment of this invention. It is a figure for demonstrating the repair method of the drainage structure which concerns on embodiment of this invention, Comprising: It is sectional drawing which showed the state which performed the first repair. It is a figure for demonstrating the repair method of the drainage structure which concerns on embodiment of this invention, Comprising: It is sectional drawing which showed the state which performed the 2nd repair. It is sectional drawing which showed the piping part of the drainage drain member which concerns on other embodiment of this invention. It is sectional drawing which showed the state which performed the conventional repair.

  A drainage drain member according to an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the drainage drain member 1 is provided in a drainage channel 3 formed on a floor 2 of a roof or a balcony. The floor 2 is configured by forming a waterproof layer 5 on a base 4. The waterproof layer 5 is formed of a known waterproof material such as a waterproof sheet or applied waterproof. A drainage structure 8 is formed by connecting the drainage port (opening) 6 of the waterproof layer 5 and the drainage pipe 7 below the drainage drain member 1.

  As shown in FIGS. 1 and 2, the drainage drain member 1 includes a pipe part 10, a base fixing part 30, and a waterproof layer fixing part 40.

  The piping part 10 connects the drain port 6 and the drain pipe 7 (refer FIG. 1). The piping part 10 is composed of a stepped cylindrical tube. As shown in FIG. 1, a modified drain support portion 11 is provided on the inner surface of the piping portion 10 so as to project inward. The repair drain support portion 11 is formed over the entire circumference of the inner surface of the piping portion 10 and supports the tip surface (lower end surface) of the repair drain 50 (see FIGS. 1, 3, and 4) described later. It has a surface 12. The support surface 12 has an annular planar shape extending in the horizontal direction. The planar shape of the support surface 12 is the same shape as the front end surface (lower end surface) of the repaired drain 50 to be supported. The inner diameter dimension of the inner peripheral surface of the pipe portion 10 connected to the upper side of the support surface 12 is equal to the outer diameter dimension of the outer peripheral surface of the repaired drain 50 to be supported. The inner peripheral surface is a surface to which the outer peripheral surface of the repair drain 50 is fitted (hereinafter referred to as “fitting inner peripheral surface 13”).

  In this embodiment, the repair drain support part 11 is formed in two places up and down. Of the upper and lower repair drain support parts 11, 11, the repair drain support part 11 a located on the upper side protrudes inward by reducing the diameter of the pipe body of the pipe part 10 with a step. The modified drain support portion 11b located on the lower side protrudes inward by forming an annular ridge 16 that protrudes inwardly on the inner peripheral surface of the piping portion 10. The upper surface of the ridge constitutes the support surface 12. As shown in FIG. 3, the drain pipe 7 is fitted into the pipe portion 10 below the ridge. The lower surface of the ridge 16 is a drain pipe contact surface 17, and the upper end surface of the drain pipe 7 contacts the drain pipe contact surface 17.

  At the upper end portion of the fitting inner peripheral surface 13 positioned on the upper side of the upper modified drain support portion 11a, a modified drain guide surface 14 is formed. The guide surface 14 is formed in a taper shape whose diameter increases as it goes upward. According to such a guide surface 14, the tip (lower end) of the repair drain 50 inserted into the pipe portion 10 from above is guided along the tapered guide surface 14 to the inner fitting inner peripheral surface 13. .

  The pipe portion 10 located on the upper side of the guide surface 14 has a diameter that gradually increases upward. Thereby, the upper end part of the piping part 10 is in the expanded state, and a space for fixing the waterproof layer fixing part 40 is secured inside. In addition, the upper end part of the piping part 10 is not limited to the shape which expands in diameter, The straight tubular shape provided with the fixed internal diameter may be sufficient. In this case, a space for fixing the waterproof layer fixing portion 40 is secured at the enlarged diameter portion of the guide surface 14.

  As shown in FIG. 2, the inner peripheral edge 15a protrudes upward from the outer peripheral edge 15b of the annular upper end surface of the pipe portion 10. An outer peripheral edge 15 b of the upper end surface of the piping part 10 is a fixing surface of the base fixing part 30.

  As shown in FIG. 1, the base fixing part 30 is a member for fixing the drainage drain member 1 to the base of the floor 2 of the roof or balcony. As shown in FIGS. 1 and 2, the base fixing part 30 is made of a plate material and has a square shape in plan view. A circular through hole 31 is formed at the center of the base fixing portion 30. The inner diameter of the through hole 31 is equal to the outer diameter of the protruding portion of the inner peripheral edge 15 a at the upper end of the pipe portion 10. The protruding portion of the inner peripheral edge 15 a of the pipe portion 10 enters and is connected to the inside of the through hole 31. The thickness dimension of the base fixing portion 30 is equal to the protruding height of the protruding portion, and the upper end surface of the inner peripheral edge 15a and the upper surface of the base fixing portion 30 are flush with each other. The lower surface of the base fixing part 30 is in contact with the outer peripheral edge 15 b at the upper end of the pipe part 10, and the base fixing part 30 is bonded to the outer peripheral edge 15 b of the pipe part 10. Screw holes 32 (see FIG. 2) are formed in the peripheral edge portion (four corner portions in the present embodiment) of the base fixing portion 30. A screw V screwed into the roof base is inserted into the screw hole 32 (see FIG. 1).

  As shown in FIG. 1, the waterproof layer fixing | fixed part 40 is a member for fixing the drainage drain member 1 to the opening edge part of the waterproof layer 5 formed in the surface of the floor part 2 of a roof or a balcony. As shown in FIGS. 1 and 2, the waterproof layer fixing part 40 includes a flat plate part 41 and a cylindrical part 42. The flat plate portion 41 and the cylindrical portion 42 are made of a resin material and are integrally formed. The flat plate portion 41 is formed in a size having a sufficient margin for watertight connection to the waterproof layer 5. In the present embodiment, the flat plate portion 41 has a square shape in plan view. The shape of the flat plate portion 41 is not limited to a square, and may be another shape such as a circle or a polygon. The flat plate part 41 is larger than the base fixing part 30 and covers the whole base fixing part 30 from above. A circular through hole 43 is formed at the center of the flat plate portion 41. The cylindrical portion 42 is connected to the through hole 43. The outer peripheral surface of the cylindrical portion 42 has a shape along the inner peripheral surface of the upper end portion of the pipe portion 10. The cylindrical portion 42 is fitted inside the upper end portion of the piping portion 10.

  Next, the structure of the repair drain 50 will be described. As shown in FIG. 3, the repair drain 50 is mounted when the drainage structure 8 is repaired. The repair drain 50 includes a tube portion 51 and a flange portion 52. The cylinder part 51 is a site | part inserted in the piping part 10, and is comprised by the ready-made PVC pipe. The collar part 52 is a part fixed to the opening edge part of the waterproof layer fixing | fixed part 40 or the waterproof layer 5 (In this embodiment, the collar part 52 is being fixed to the upper surface of the waterproof layer fixing | fixed part 40. Although not shown, when the collar portion is larger than the waterproof layer fixing portion, the collar portion is fixed to the upper surface of the waterproof layer). The flange portion 52 includes a flat plate portion 53 and a cylindrical portion 54. The flange portion 52 is fixed to the cylinder portion 51 by the cylindrical portion 54 being inserted and bonded inside the upper end portion of the cylinder portion 51.

  As shown in FIG. 3 and FIG. 4, in the present embodiment, as the repair drain 50, two types having different sizes of the first repair drain 50 a and the second repair drain 50 b are used. As shown in FIG. 3, the first repair drain 50a is attached at the time of the first repair, and has a larger diameter than the second repair drain 50b. The first repair drain 50 a is inserted inside the piping part 10. The front end surface (lower end surface) of the cylindrical portion 51 of the first modified drain 50a has the same planar shape as the support surface 12 of the modified drain support portion 11a located on the upper side. The distal end surface of the cylinder portion 51 of the first modified drain 50a abuts on the upper support surface 12 and is in surface contact with the support surface 12 over the entire circumference. The outer peripheral surface of the tip portion of the cylindrical portion 51 of the first modified drain 50 a is fitted to the fitting inner peripheral surface 13.

  The second repair drain 50b is attached at the time of the second repair, and is inserted inside the first repair drain 50a. The distal end surface (lower end surface) of the cylindrical portion 51 of the second modified drain 50b has the same planar shape as the support surface 12 of the modified drain support portion 11b located on the lower side. The distal end surface of the cylindrical portion 51 of the second modified drain 50b is in contact with the lower support surface 12 and is in surface contact with the support surface 12 over the entire circumference. The outer peripheral surface of the distal end portion of the cylindrical portion 51 of the second modified drain 50 b is fitted to the fitting inner peripheral surface 13. The inner peripheral diameter of the second modified drain 50 b is equal to the inner peripheral diameter of the drain pipe 7.

  A method for repairing the drainage structure 8 using the drainage drain member 1 and the repair drain 50 configured as described above will be described below.

  The first renovation will be carried out 10 years after completion. This is because the service life of the connecting portion of the drainage structure 8 is about 10 years. In the first renovation, as shown in FIG. 3, the cylindrical portion 51 of the first renovation drain 50 a is inserted from the drain outlet 6 side of the waterproof layer 5 into the drainage drain member 1 (inside the piping portion 10). At this time, the tip of the repair drain 50a is moved to the center of the pipe portion 10 by the inclined guide surface 14, and is guided to the repair drain support portion 11a without being caught by the step on the inner peripheral surface. And the front end surface of the cylinder part 51 of the 1st repair drain 50a is made to contact | abut to the support surface 12 of the upper repair drain support part 11a, and is brought into surface contact. At this time, the outer peripheral surface of the front end portion of the first repair drain 50 a is fitted and closely attached to the fitting inner peripheral surface 13 connected to the upper side of the support surface 12. As a result, the first repair drain 50a and the drainage drain member 1 are in a watertight connection.

  Alternatively, an adhesive may be applied to the tip surface of the cylinder portion 51 of the first repair drain 50a, and the tip surface may be bonded to the support surface 12 of the upper repair drain support portion 11a. In this way, water tightness is improved.

  And the collar part 52 of the repair drain 50a will be in the state laid on the waterproof layer fixing | fixed part 40 of the drainage drain member 1. FIG. By applying or affixing a sealing material so as to straddle the peripheral edge of the flange portion 52 and the upper surface of the waterproof layer fixing portion 40, the gap between the flange portion 52 and the waterproof layer fixing portion 40 is stopped. In addition, when the collar part 52 is larger than the waterproof layer fixing | fixed part 40, a sealing material is apply | coated or affixed between the collar part 52 and the waterproof layer 5. FIG.

  The second renovation will be conducted 10 years after the first renovation. In the second modification, as shown in FIG. 4, the cylinder part 51 of the second modification drain 50b is inserted into the inside of the first modification drain 50a (inside the cylinder part 51) from the drain port 6 side of the waterproof layer 5. To do. And the front end surface of the cylinder part 51 of the 2nd repair drain 50b is made to contact | abut and contact the support surface 12 of the lower repair drain support part 11b. At this time, the outer peripheral surface of the tip portion of the second modified drain 50b is fitted and closely attached to the fitting inner peripheral surface 13 connected to the upper side of the lower support surface 12. As a result, a watertight connection is made between the second modified drain 50b and the drainage drain member 1.

  Alternatively, an adhesive may be applied to the tip surface of the cylinder portion 51 of the second repair drain 50b before insertion, and the tip surface may be bonded to the support surface 12 of the lower repair drain support portion 11b. In this way, water tightness is improved.

  And the collar part 52 of the 2nd repair drain 50b will be in the state laid on the collar part 52 of the 1st repair drain 50a. By applying or affixing a sealing material so as to straddle the peripheral edge of the flange 52 of the modified drain 50b and the upper surface of the flange 52 of the modified drain 50a, the gap between the flanges 52, 52 is stopped. In addition, when the collar part 52 of the 2nd repair drain 50b is larger than the collar part 52 of the 1st repair drain 50a, it is a sealing material between the collar part 52 and the waterproof layer fixing | fixed part 40 (or waterproof layer 5). Apply or paste.

  According to the method for repairing the drainage drain member 1 and the drainage structure 8 as described above, the repair drain is simply inserted by inserting the repair drain 50 into the piping part 10 and contacting the support surface 12 of the repair drain support part 11. Since it can seal over the perimeter of 50 front-end | tip parts, a watertight connection can be performed easily. That is, the repair drain 50 can be watertightly connected to the drain pipe 7 via the pipe portion 10 of the drain drain member 1. Therefore, even if a back flow or clogging occurs in the drain pipe 7 and a full pipe state occurs, the gap between the existing drain drain (drain drain member 1) and the repair drain (renovation drain 50) (outside the repair drain 0) There will be no drainage into the water. Therefore, no flooding occurs around the base fixing part 30. That is, since the periphery of the base fixing portion 30 can be partitioned from the water flow region by the renovation drain 50, the existing waterproof layer fixing portion 40, the joint portion of the waterproof layer fixing portion 40 and the piping portion 10 due to aging, Even if the seal around the base fixing portion 30 is damaged, it is possible to prevent water from entering the building's housing.

  In addition, since an already-made PVC pipe is used instead of the bellows pipe as the cylinder part 51 of the renovated drain 50, the diameter of the drainage channel in the pipe part 10 can be greatly reduced as compared with a conventionally used bellows pipe. Can be suppressed. That is, even if the second modified drain 50b is mounted inside the first modified drain 50a, the diameter of the drainage channel necessary for drainage can be secured. Accordingly, it is possible to suppress the drainage capacity from being lowered and to perform the second repair.

  On the other hand, the flange portion 52 of the repair drain 50 covers the drain port 6 and is provided with a sealing material at the peripheral edge thereof, so that it is not necessary to remove the existing drainage drain (drainage drain member 1). At the same time, according to the present invention, the repair drain 50 is watertightly connected to the drain pipe 7 via the pipe portion 10 of the drain drain member 1. Therefore, it is possible to form a new watertight waterproof structure while leaving the waterproof layer 5 without being damaged. Therefore, it is not necessary to reconstruct the existing waterproof layer 5, so that the repair work can be easily performed. In contrast, when the modified drain 120 having the conventional bellows tube portion 122 shown in FIG. 6 is used, watertight connection cannot be performed. In order to make a watertight connection, the drainage drain 110 must be cut and removed once to expose the pipe portion 102, and then the construction equivalent to that of the drainage drain 110 must be reconstructed. That is, compared with the case where drainage drain is removed at the time of watertight piping connection of the conventional repair drain, the work process is greatly reduced in the repair method. In short, according to the above-described repair method, the repair drain 50 can be connected in a watertight manner without incising the existing waterproof layer 5 associated with the removal. As a result, even if rain occurs during the renovation work, it is possible to prevent rainwater from entering the enclosure. Further, since it is not necessary to cut the existing waterproof layer 5, the construction period can be shortened, and the watertight connection can be made by the modified drain member 1 having a simpler structure than the conventional one. Therefore, the cost for the renovation work can be reduced.

  Moreover, in this embodiment, the repair drain 50 can be mounted twice by providing two stages of the repair drain support portions 11. As a result, the drainage structure 8 can ensure waterproof performance for a total of 30 years, 10 years from completion, 10 years from the first renovation, and 10 years from the second renovation. Therefore, since the waterproof layer 5 that has been extended to 30 years can be used effectively without wasting it due to the development of waterproof materials in recent years, the drainage structure 8 taking advantage of the performance of the highly durable waterproof layer 5 Can be repaired. In addition, when 30 years or more have passed since the completion, the existing waterproof layer 5 and the drainage structure 8 are removed and repaired by newly constructing.

  Next, a modified example of the drainage drain member according to the embodiment of the present invention will be described with reference to FIG. In the drainage drain member 1 of the above-described embodiment, the pipe portion 10 is configured as a single member. However, as shown in FIG. 5, the drainage drain member 1 a according to the modification includes a pipe body 10 a and a pipe body 71. It consists of two members, a joint member 72 that connects the pipe main body 71 to a lower drain pipe (not shown).

  The pipe body 71 is composed of a PVC pipe and has a cylindrical shape. The upper end portion of the pipe main body 71 has the same shape as the upper end of the pipe portion 10.

  The joint member 72 has a cylindrical shape. A pipe body support part 73 for connecting the pipe body 71 is formed at the upper end of the joint member 72. The pipe body support portion 73 is formed over the entire inner surface of the joint member 72 and has a support surface 74 with which the lower end surface of the pipe body 71 abuts. The support surface 74 has an annular planar shape extending in the horizontal direction. The planar shape of the support surface 74 is the same shape as the distal end surface of the pipe main body 71. The inner diameter of the inner peripheral surface of the joint member 72 connected to the upper side of the support surface 74 is equal to the outer diameter of the outer peripheral surface of the pipe body 71. The inner peripheral surface is a surface to which the outer peripheral surface of the pipe main body 71 is fitted (hereinafter referred to as “fitting inner peripheral surface 75”).

  The joint member 72 below the pipe body support part 73 has the same shape as the lower part of the pipe part 10 and includes repair drain support parts 11a and 11b, a fitting inner peripheral surface 13 and the like. About the part of the same structure as the said piping part 10, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  According to the drainage drain member 1a having such a configuration, the same effect as that of the above embodiment can be obtained. In addition, since the existing PVC pipe can be used for the pipe body 71, the manufacturing cost of the drainage drain member 1a can be reduced. Can do. Further, the length of the drainage drain member 1a can be easily adjusted.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in the above-described embodiment, the drainage drain member 1 has the repair drain support portions 11 and 11 formed at two upper and lower portions, but is not limited thereto. The repair drain support part 11 may be formed at only one place, or may be formed at three or more places. However, in the current waterproof layer 5, the configuration of the above embodiment that can be repaired twice is preferable. When the service life of the waterproof layer 5 further increases in the future, it is preferable to increase the repair drain support 11.

  Moreover, in the said embodiment, although the base plate part 41 of the base | substrate fixing | fixed part 30 and the waterproof layer fixing | fixed part 40 is square shape, the shape is not limited to a square. Other shapes such as a circle and a polygon may be used.

  Furthermore, in the said embodiment, although the drainage drain member 1 is extended and arrange | positioned in the up-down direction, it is not limited to this. When the drainage drain member is provided in the drainage opening formed on the wall surface that rises on the side of the roof or balcony, the drainage drain member may be arranged extending in the lateral direction or inclined.

  Moreover, in the said embodiment, although the drainage pipe 7 is directly connected to the lower end part of the drainage drain member 1, it is not limited to this. The lower end portion of the drainage drain member 1 may be connected to the drainage pipe 7 via an existing joint member.

  Moreover, in the said embodiment, although the piping part 10 and the base | substrate fixing | fixed part 30 are comprised by the member separated, it is not limited to this, It protruded in the hook shape at the upper end part of the piping part. The structure which integrally molded the base | substrate fixing | fixed part may be sufficient.

DESCRIPTION OF SYMBOLS 1 Drain drain member 1a Drain drain member 6 Drain port 7 Drain pipe 8 Drainage structure 10 Piping part 10a Piping part 11 Repair drain support part 11a Upper repair drain support part 11b Lower repair drain support part 12 Support surface 13 In fitting Peripheral surface 14 Guide surface 30 Base fixing part 40 Waterproof layer fixing part 41 Flat plate part 42 Cylindrical part 43 Through hole 50 Repair drain 50a First repair drain 50b Second repair drain 71 Pipe body 72 Joint member 73 Pipe body support part 74 Piping body support surface

Claims (6)

In the drainage drain member provided with a piping part connecting the drainage port and the drainage pipe,
On the inner surface of the pipe part, a repair drain support part is provided that projects inward,
The repair drain support portion is formed over the entire circumference of the inner surface of the piping portion, and has a support surface with which a tip surface of the repair drain mounted at the time of repair comes into contact. Element. The repair drain support portion is provided in a plurality of stages,
The repair drain support part positioned on the drain pipe side among the plurality of repair drain support parts projects inward from the repair drain support part positioned on the drain port side. The drainage drain member as described. The pipe part includes a pipe body and a joint member that connects the pipe body to the drain pipe,
The drainage drain member according to claim 1 or 2, wherein the repair drain support portion is provided on the joint member. A tubular joint member used for a drainage drain member connecting the drain port and the drain pipe,
On the inner surface, there are pipe body support part and repair drain support part projecting inward,
The pipe main body support part is formed over the entire circumference of the inner surface, and has a pipe support surface with which the front end surface of the pipe main body connected to the drainage port abuts.
The repair drain support portion is formed over the entire circumference of the inner surface, and has a support surface with which a front end surface of the repair drain mounted at the time of repair comes into contact. In the repair method of the drainage structure formed by connecting the drain outlet and the drain pipe with the drainage drain member,
On the inner surface of the drainage drain member, there is provided a repair drain support portion projecting inward,
The improved drain support portion is formed over the entire circumference of the inner surface of the drainage drain member,
A first repair drain is inserted into the drainage drain member from the drainage port side, and a tip surface of the first repair drain is brought into contact with a support surface of the repair drain support portion to establish a watertight connection. After applying
A method for repairing a drainage structure, wherein the periphery of the drain port side end of the first repair drain is stopped. The repair drain support portion is provided in a plurality of stages,
Among the plurality of repair drain support portions, the repair drain support portion located on the drain pipe side protrudes inward from the repair drain support portion located on the drain port side,
A second repair drain is inserted into the first repair drain from the drain outlet side, and the tip surface of the second repair drain is supported on the drain drain support portion located on the drain pipe side. After making a watertight connection by contacting the
The drainage structure refurbishing method according to claim 5, wherein the periphery of the drain port side end of the second repair drain is stopped.

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