JP2013167140A - Slab buried part structure of pipe body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slab buried part structure of a pipe body which can be easily drawn out even if it is disposed astride a slab penetration part in a state that it is buried by a backfill material.SOLUTION: In a slab buried part structure, a pipe body 10 for drainage penetrates a penetration part 2 of the slab 1 in a state the pipe body 10 is buried by a backfill material 3. The pipe body 10 comprises a pipe main body 11 and a smooth pipe 29 assembled to the pipe main body 11. The pipe main body 11 includes: an upper step difference part 17 and a lower step difference part 25 arranged near an upper part 2a and near a lower part 2b of the penetration part 2, respectively, and protruding outward; and a connection pipe part 19 arranged in an arrangement position of the backfill material 3 between the upper step difference part and the lower step difference part, and having a diameter smaller than the outer diameter of the upper step difference part and the lower step difference part. The smooth pipe 29 is assembled to an outer peripheral surface side of the pipe main body 11 such that it can be drawn out to the upper part of the penetration part 2 in the pipe body 10 and the outer diameter dimension of an outer peripheral surface side from the upper step difference part 17 and the lower step difference part 25 is equalized.

Description

  The present invention relates to a pipe slab embedded portion structure that can be smoothly pulled out from a through portion of a slab embedded in a backfill material when a pipe body such as a pipe joint of an apartment house is updated.

  Conventionally, in a drainage pipe joint, a portion made of a synthetic resin, which contains a thermally expansive graphite or the like and has a large thermal expansion so as to prevent the spread of fire from the lower floor to the upper floor by blocking the slab penetration, The thing arrange | positioned in the penetration part of this is known (for example, refer patent document 1).

  In such a pipe joint, a large thermal expansion is performed between the upper joint part connected to the lateral branch pipe and the lower joint part of the lower narrow tapered tube provided with the turning guide so as to close the inner peripheral side. The connecting pipe portion made of synthetic resin is fitted and bonded. And the upper joint part and the lower joint part of the upper and lower sides of the connecting pipe part are each provided with the receiving part so that the connecting pipe part is inserted and joined.

JP 2011-6893 A

  However, in the conventional pipe joint, the outer diameter dimension of the upper and lower upper joint parts and the lower joint part of the connecting pipe part is larger than the connecting pipe part so that the connecting pipe part is inserted and the end surface is received. It became large and formed a stepped portion. Therefore, it has been difficult to remove the conventional pipe joint from the slab when it is renewed to a new pipe joint after the end of its useful life or after a fire.

  That is, in a pipe body such as a pipe joint in which stepped parts are arranged above and below the connecting pipe part, the slab penetration part is penetrated at the time of construction, and a backfilling material such as mortar is used to penetrate the pipe part. Even if an attempt is made to pull out the pipe joint above the slab, the stepped portion is caught by the backfill material and does not come off. Therefore, the backfilling material around the pipe body such as the pipe joint is largely demolished so that the stepped portion can pass through, and the pipe body is pulled out, and then a new pipe joint is made using the backfilling material. It had to be backfilled and it took time and effort.

  This invention solves the above-mentioned subject, and even if it is arrange | positioned ranging through the penetration part of a slab as a state embed | buried by the backfilling material, the slab embedding part of the pipe body which pulls out a pipe body easily The purpose is to provide a structure.

<Explanation of Claim 1>
The tubular slab buried portion structure according to the present invention is a tubular slab buried portion structure that penetrates a through portion of a slab in a state where a drainage tubular body is buried by a backfill material,
The pipe body is configured to include a pipe body that allows drainage to flow down, and a smooth pipe that is assembled to the outer peripheral side of the pipe body to smooth the outer peripheral surface,
The tube body is
An upper step portion and a lower step portion that are arranged near the upper portion and the lower portion of the penetrating portion and project to the outer peripheral side,
A connecting pipe portion having an outer diameter smaller than an outer diameter of the upper step portion and the lower step portion, disposed at an arrangement position of the backfill material between the upper step portion and the lower step portion; ,
Configured with
The smooth tube is capable of being pulled out upward from the through-hole in the tubular body, so that the outer diameter on the outer peripheral surface side from the upper step portion to the lower step portion is uniform. Assembled on the outer circumference,
The tubular body is embedded in the penetrating portion.

  In the slab embedded portion structure of the tubular body according to the present invention, the smooth tube has an outer diameter on the outer peripheral surface side from the upper step portion to the lower step portion of the tubular body so that the slab penetrating portion in the tubular body can be drawn upward. Since it is assembled on the outer peripheral side of the tube body so that the dimensions are uniform, if the tube is pulled up strongly, the tube can be pulled out smoothly without being caught by the backfill material. .

  Therefore, in the slab embedding portion structure of the tubular body according to the present invention, the tubular body can be easily pulled out even when the tubular body is disposed across the penetrating portion of the slab as being embedded by the backfill material. Can do.

  After that, when installing a new pipe body, the backfill material is not largely demolished. Therefore, the new pipe body is arranged in the through portion of the slab only by using a small amount of a sealing material or the like that can ensure sealing performance. Therefore, the tube can be updated easily.

  Of course, at the time of renewal, a tube having a smaller diameter than that of the pulled-out tube may be used, and a new small-diameter tube may be embedded in the slab penetrating portion while using the backfill material.

<Explanation of Claim 2>
In the tubular slab embedding portion structure according to the present invention, the smooth tube has a contact seat that contacts the upper surface side of the lower stepped portion at the lower end corresponding to the upper surface side of the lower stepped portion. May be configured.

  In such a configuration, when the tube body is pulled out, the abutment seat at the lower end of the smooth tube is pushed up while contacting the upper surface side of the lower step portion of the tube body. In a stopped state, it can be smoothly pulled out together with the pipe body without shifting from the pipe body.

<Explanation of Claims 3 and 4>
In the slab buried portion structure of the tubular body according to the present invention, the smooth tube is
Assembling on the outer peripheral side of the connecting pipe part between the upper step part and the lower step part of the pipe body, or
The pipe main body can be assembled to the outer peripheral side of the connecting pipe part including the outer periphery of at least one of the upper step part and the lower step part.

  In the former case, which is assembled between the upper step part and the lower step part, the length of the smooth tube is shorter and the outer diameter dimension near the connecting pipe part of the tube body is made smaller than in the latter case. can do.

  On the contrary, in the latter case where the smooth tube is assembled to the outer peripheral side of the connecting tube portion including the outer periphery of at least one of the upper step portion and the lower step portion, the smooth tube covers the upper step portion and the lower step portion. The outer diameter of the tube at the slab penetrating part is integrally covered with the smooth tube itself from the upper step part to the lower step part. The dimensions can be equalized smoothly, and the tube body can be pulled out more easily.

<Explanation of Claims 5 and 6>
In the slab embedding structure of the tubular body according to the present invention, the smooth tube may be formed as an integral cylindrical shape, or may be formed from a divided body divided along the circumferential direction.

  If the smooth tube is formed in an integral cylindrical shape, when the tube body is formed by appropriately assembling the upper stepped portion, the lower stepped portion, or the connecting tube portion, If the connecting tube portion is inserted into the tube and assembled, a tube body in which a smooth tube is assembled between the upper and lower stepped portions can be easily manufactured.

  When the smooth tube is formed from divided bodies, it is necessary to use connecting means such as an adhesive so as to connect the divided bodies to each other. Tubes can be assembled.

<Explanation of Claim 7>
In the slab buried portion structure of the tubular body according to the present invention, the smooth tube is provided with an inner layer having at least one function of preventing fire spread, soundproofing or vibrationproofing on the inner peripheral side. In such a configuration, the tube body can obtain effects such as prevention of fire spread, soundproofing, and vibration isolation along with the function of the inner layer.

It is sectional drawing which shows the slab embedding part structure of the tubular body of one Embodiment of this invention. It is a principal part disassembled expanded sectional view of the tubular body of an embodiment. It is a figure which shows the operation | work which pulls out the tubular body of embodiment. It is a figure which shows the operation | work which pulls out the tubular body of embodiment, and shows the back of FIG. It is sectional drawing which shows the modification of embodiment. It is sectional drawing which shows the other modification of embodiment. It is sectional drawing which shows the other modification of embodiment. It is a perspective view which shows the modification of the smooth tube of embodiment. It is a partially broken perspective view which shows the other modification of the smooth tube of embodiment. It is a partially broken perspective view which shows the other modification of the smooth tube of embodiment. It is a partially broken perspective view which shows the other modification of the smooth tube of embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the tubular slab embedding portion structure according to the embodiment, as shown in FIG. In a state of being buried by the return material 3, the tubular body 10 is disposed so as to penetrate therethrough. The pipe body 10 is a drainage pipe joint disposed between the upper drainage stack 5 and the lower drainage stack 6, and a pipe main body 11 that allows the drainage to flow down, and an outer peripheral side of the pipe main body 11. And a smooth tube 29 to be assembled.

  As shown in FIGS. 1 and 2, the pipe body 11 is made of a synthetic resin mainly composed of vinyl chloride, polyethylene, or the like, and includes an upper joint portion 12, a lower joint portion 21, and an upper joint portion 12 and a lower joint portion 21. It is comprised from the cylindrical connection pipe part 19 arrange | positioned between.

  The upper joint portion 12 includes an upper receiving port portion 13 for inserting the upper drainage stack 5 and connecting the drainage stacker tube 5, and a horizontal receiving port portion 14 for inserting the lateral branch tube 7 and connecting the horizontal branching tube 7. And a lower receiving part 15 for inserting the upper end 19a of the connecting pipe part 19 and joining the connecting pipe part 19 to each other. The lower receiving portion 15 is provided with a step on the inner peripheral side, a receiving surface 15a for receiving the upper end surface 19b of the connecting pipe portion 19 is disposed, and the upper end 19a of the connecting pipe portion 19 is inserted. For this reason, the upper stepped portion 17 that protrudes to the outer peripheral side is formed by making the outer diameter dimension DU larger than the connecting pipe portion 19.

  A bush 27 made of synthetic resin or rubber for securing the sealing performance and connecting the drainage stack 5 and the side branch pipe 7 to the upper receiving section 13 and the side receiving section 14 of the upper joint section 12. , 28 are arranged.

  The lower joint portion 21 is inserted into the upper receiving port portion 22 to which the lower end 19c of the connecting pipe portion 19 is inserted to join the connecting pipe portion 19 and the lower drainage stack 6 to be connected to the drainage stack 6. And a mouth portion 23. The upper receiving portion 22 is provided with a step on the inner peripheral side, a receiving surface 22a for receiving the lower end surface 19d of the connecting pipe portion 19 is disposed, and the lower end 19c of the connecting pipe portion 19 is inserted. For this reason, the lower stepped portion 25 that protrudes to the outer peripheral side by making the outer diameter dimension DD larger than the connecting pipe portion 19 is formed.

  The lower joint portion 21 is formed as a tapered tube so that the lower receiving port portion 23 side has a smaller diameter than the upper receiving port portion 22, and a turning guide 21 a for generating a swirling flow in the drainage is formed on the inner peripheral surface. It is arranged.

  The connecting pipe portion 19 is made of a synthetic resin made of vinyl chloride or the like, and is formed of a pipe material having uniform inner and outer diameters. The connecting pipe part 19 uses the upper end 19a and the lower end 19c so that the upper and lower end faces 19b and 19d are in contact with the receiving faces 15a and 22a, respectively, while using an adhesive or the like. The upper joint part 12 and the lower joint part 21 are coupled by being inserted into the upper receiving part 22 of the part 15 and the lower joint part 21.

  In the pipe body 11, the intermediate step portion 19 e of the connecting pipe portion 19 between the lower receiving portion 15 and the upper receiving portion 22 is an upper step constituting the lower receiving portion 15 and the upper receiving portion 22. The diameter is smaller than the portion 17 and the lower step portion 25.

  The smooth tube 29 is made of a lightweight metal cylinder such as an electric sewing tube, and the outer peripheral surface 29u is configured to be smooth, and in the case of the embodiment, the lower receiving portion 15 of the upper joint portion 12 in the tube main body 11 It is assembled on the outer peripheral side of the connecting pipe part 19 between the lower joint part 21 and the upper receiving part 22. The degree of smoothness of the outer peripheral surface 29u does not have to be a high degree of smoothness that forms a mirror surface. When the pipe joint 10 is pulled upward, the smooth pipe 29 is smoothly separated from the mortar 3 while being separated from the mortar 3. It is only necessary to pull out while sliding with respect to 3. The smooth tube 29 has its outer diameter DM set equal to the outer diameters DU and DD of the lower receiving portion 15 of the upper joint portion 12 and the upper receiving portion 22 of the lower joint portion 21 in the pipe body 11. Has been.

  Further, in the embodiment, the smooth tube 29 is configured as a cylindrical integrated body, and the connecting tube portion 19 at the time of forming the tube main body 11 is connected to the lower joint portion 15 or the lower joint portion 21 of the upper joint portion 12. When combined with the upper receiving portion 22, it is fitted around the connecting pipe portion 19, and when the connecting operation to the lower receiving portion 15 or the upper receiving portion 22 of the connecting pipe portion 19 is completed, the smooth tube 29 is fitted and assembled between the lower receiving portion 15 of the upper joint portion 12 of the pipe body 11 and the upper receiving portion 22 of the lower joint portion 21 on the outer peripheral side of the connecting pipe portion 19, and The pipe joint 10 will be formed.

  In the embodiment, when the pipe joint 10 is formed, the smooth pipe 29 has the upper end 29 a abutted against the lower surface (lower end surface) 15 b of the lower receiving portion 15 of the upper joint portion 12 and the lower end 29 b is lowered to the lower joint portion 21. It is made to contact | abut to the upper surface (push-up surface) 22b of the upper receptacle part 22. FIG. In particular, in the embodiment, a fitting groove 22c that is recessed over the entire circumference is formed on the outer peripheral edge of the upper end 22t of the upper receiving portion 22 of the lower joint portion 21, and the lower end 29b of the smooth tube 29 is fitted into the fitting groove 22c. Thus, a contact seat 29c that contacts the upper surface 22b is configured.

  In this pipe joint 10, the slab can be connected to the drainage stack 6 at the time of construction by arranging the portion of the connecting pipe part 19 in the penetrating part 2 of the slab 1 and filling the periphery with the backfill material 3. 1 can be embedded in the penetrating part 2. Then, the horizontal branch pipe 7 is connected to the horizontal receiving port portion 14, and the drainage stack 5 is connected to the upper receiving port portion 13.

  In the embodiment, when the pipe joint 10 is embedded in the penetrating portion 2 of the slab 1, the pipe joint 10 is embedded using the slab lower support fitting 40. This slab lower support metal fitting 40 uses a nut 43 and 43 to support a support member 42 that holds the lower joint portion 21 to a male screw portion 41a of a plurality of embedded bolts 41 to be fastened to the lower surface 1b side of the slab 1. Stopped. And the support material 42 is set as the structure which clamps the outer peripheral surface of the lower joint part 21 by the clamp part 42a which can be diameter-reduced at the time of the bolt fastening in the site | part which is not shown in figure.

  In the slab buried portion structure of the embodiment, when the pipe joint 10 is pulled out at the time of renewal, first, as shown in FIG. 3, the drainage stacks 5 and 6 are cut and the support frame 52 of the pulling tool 50 is removed. The two leg portions 52a are installed on the upper surface 1a of the slab 1, and the screw shaft 53 extending downward from the top plate portion 52b of the support frame 52 is connected to the pipe joint 10 and the drainage standpipe from the upper drainage standpipe 5. 6 and the pulling piece 54 is fastened to the lower end of the screw shaft 53.

  Thereafter, as shown in FIGS. 3 and 4, the clamp portion 42 a is loosened and the lower nut 43 is loosened to remove the support member 42 of the lower slab support bracket 40 from the lower joint portion 21, and then the screw shaft 53. By turning the ratchet wrench 55 at the upper end and pulling up the lifting piece 54, the pipe joint 10 can be easily pulled out from the penetrating portion 2 of the slab 1.

  At that time, in the embodiment, the smooth pipe 29 is arranged on the outer peripheral surface side from the upper step portion 17 to the lower step portion 25 of the pipe joint 10 so that the through-hole 2 of the slab 1 in the pipe joint 10 can be pulled upward. Since it is assembled on the outer peripheral side of the pipe body 11 so that the outer diameter dimensions DU, DM, DD are uniform, if the pipe joint 10 is pulled up strongly, it will be caught by the mortar (backfill material) 3. The pipe joint 10 can be pulled out smoothly without any problems.

  Therefore, in the slab buried portion structure of the pipe joint according to the embodiment, even if the pipe joint 10 as a pipe body is disposed across the through portion 2 of the slab 1 as being buried by the mortar 3, 10 can be pulled out easily.

  After that, when the new pipe joint 10 is disposed, the mortar 3 is not largely demolished. Therefore, the new pipe joint 10 can be connected to the through portion of the slab 1 only by using a small amount of a sealing material or the like that can ensure hermeticity. 2 and the pipe joint 10 can be updated easily.

  In addition, at the time of renewal, it is of course possible to embed a new small-diameter pipe joint in the penetrating portion 2 of the slab 1 while using the mortar 3 using a pipe joint having a smaller diameter than the drawn pipe joint 10. It is.

  In the embodiment, the smooth tube 29 is fitted into the fitting groove 22c at the lower end 29b so as to correspond to the fitting groove 22c of the upper surface 22b of the upper receiving portion 22 of the lower joint portion 21 as the lower step portion 25. In addition, an abutment seat 29c that abuts on the upper surface 22b serving as a pushing surface is disposed.

  Therefore, when pulling out the pipe joint 10, the abutment seat 29 c at the lower end 29 b of the smooth tube 29 is pushed up while abutting against the upper surface 22 b of the lower step portion 25 of the tube body 11. With the stepped portion 25 being engaged, it can be smoothly pulled out together with the tube main body 11 without shifting from the tube main body 11.

  In the pipe joint 10 of the embodiment, the fitting groove 22c is provided on the entire circumference of the outer peripheral edge of the upper end 22t of the lower step portion 25, and the contact seat 29c of the smooth tube 29 is fitted into the fitting groove 22c. did. Therefore, in the embodiment, when the contact seat 29c of the smooth tube 29 is fitted in the fitting groove 22c, the smooth tube 29 causes the inner peripheral surface 29d to contact the outer peripheral surface 22d of the upper receiving port portion 22. Even without using an adhesive or the like, there is no displacement on the upper surface 22b of the lower step portion 25 of the pipe body 11, and there is no problem when the pipe joint 10 is formed or backfilled.

  If this point is not taken into consideration, the upper surface 22b of the lower step portion 25A (upper receiving port portion 22) of the lower joint portion 21A is made planar as in the pipe joint 10A shown in FIG. You may comprise so that the planar contact seat (lower end surface) 29c of the lower end 29b of the smooth tube 29A may contact | abut on the upper surface 22b. In this case, it is desirable to adhere the contact seat 29c on the upper surface 22b so that the smooth tube 29A can be prevented from shifting in the direction perpendicular to the axis of the tube body 11A during construction.

  In the embodiment, the smooth tube 29 is assembled on the outer peripheral side of the connecting tube portion 19 between the upper step portion 17 and the lower step portion 25 of the tube main body 11, but the pipe joint 10B shown in FIG. As described above, the smooth tube 29B may be assembled on the outer peripheral side of the connecting pipe portion 19 including the outer periphery of the upper step portion 17B and the lower step portion 25B of the tube main body 11B.

  Incidentally, when the smooth tube 29 is assembled between the upper step portion 17 and the lower step portion 25 as in the pipe joint 10 of the embodiment, the length of the smooth tube 29 is longer than that of the pipe joint 10B of FIG. The dimension can be shortened and the outer diameter dimension DM in the vicinity of the connecting pipe portion 19 of the pipe joint 10 can be made compact.

  On the other hand, in the pipe joint 10B of FIG. 6, the smooth tube 29B has a length that is long enough to cover the upper step portion 17B and the lower step portion 25B, and the outer diameter in the vicinity of the connecting pipe portion 19 is increased. However, in this pipe joint 10B, from the upper stepped portion 17B to the lower stepped portion 25B is integrally covered with the smooth tube 29B itself, the outer diameter DB of the pipe joint 10B at the through portion 2 of the slab 1 is smoothly smoothed. It is possible to equalize and further easily pull out the pipe joint 10B.

  In addition, in the pipe joint 10B of FIG. 6, the lower step portion 25B is provided with a fitting groove 22c made of a concave groove on the entire circumference of the outer peripheral edge, and the smooth tube 29B has the contact seat 29c of the lower end 29b as the fitting groove 22c. The inner peripheral surface 29d is in contact with the outer peripheral surface 22d in the fitting groove 22c, and the contact seat 29c is in contact with the pushing surface 22b on the bottom surface side of the fitting groove 22c. Has been. Therefore, the smooth tube 29B is disposed on the tube body 11B without using a fixing means such as an adhesive and preventing the tube body 11B from being displaced along the direction orthogonal to the axis and the direction of the axis.

  If this point is not taken into consideration, a smooth tube 29C may be bonded and assembled to the outer peripheral side of the upper step portion 17C and the lower step portion 25C of the tube main body 11C as in a pipe joint 10C shown in FIG.

  As shown by a two-dot chain line in FIG. 7, a protrusion 29e that can abut on the upper surface (pushing surface) 22b of the lower step portion 25c (upper receiving port portion 22) on the inner peripheral surface 29d side of the smooth tube 29C. May be provided by welding or the like so that when the pipe joint 10C is pulled out, the protrusion 29e is locked to the push-up surface 22b so that the smooth tube 29C can be pushed up.

  In the embodiment, the smooth tube 29 is formed as an integral cylindrical shape. However, like the smooth tube 29D shown in FIG. 8, the smooth tube 29 is divided into a plurality of divided bodies 30 and 30 along the circumferential direction. It may be formed. That is, as in the embodiment, if the smooth tube 29 is formed in an integral cylindrical shape, the upper joint portion 12 that is a portion of the upper step portion 17 and the lower joint portion 21 that is a portion of the lower step portion 25. And, when the parts of the connecting pipe part 19 are appropriately assembled to form the pipe body 11, the parts of the connecting pipe part 19 are inserted into the smooth pipe 29 and assembled, so that the pipe joint 10 is Can be manufactured. On the other hand, when the smooth tube 29D is formed from the divided body 30, it is necessary to use connection means such as an adhesive so as to connect the divided bodies 30 and 30 to each other, but after the tube body 11 is formed. The smooth tube 29D can be assembled. Therefore, the smooth tube 29D can be easily assembled to the completed tube body 11 at the construction site.

  In addition, when arrange | positioning the smooth tube 29D which consists of the division body 30 in the outer peripheral side of the connection pipe part 19 between the upper level | step difference part 17 and the lower level | step difference part 25, the end surfaces 30a which the division body 30 opposes mutually. The end surfaces 30a are brought into contact with each other and the periphery is fastened by a connecting means such as a thin fastening band to form a cylindrical smooth tube 29D. When the smooth tube 29 </ b> D formed of the divided body 30 is disposed on the outer peripheral side of the connecting pipe portion 19 including the outer periphery of the upper step portion 17 and the lower step portion 25, the divided body 30 is disposed on the upper step portion 17. In other words, the cylindrical smooth tube 29D is formed by bonding to the outer peripheral surface with the lower stepped portion 25 or by bringing the end surfaces 30a into contact with each other and fastening the periphery with a thin fastening band or the like.

  In the illustrated example, when the smooth tube is formed from divided bodies, the number of divided bodies is not limited to two as in the illustrated example, and may be three or four.

  Furthermore, as the smooth tube, as in the smooth tubes 29E and 29F shown in FIGS. 9 and 10, the inner layer having at least one function of preventing fire spread, soundproofing or vibrationproofing on the inner peripheral side. 31 and 32 may be provided, and in such a configuration, the pipe joint 10 can obtain effects such as fire spread prevention, soundproofing, and vibration isolation in accordance with the functions of the inner layers 31 and 32. The inner layer 31 is formed from a material for preventing fire spread using heat-expandable graphite or the like as a main material, and the inner layer 32 is formed from a material for soundproofing and vibration isolation such as glass wool or rock wool.

  In the embodiment, the case where the connecting pipe portion 19 is made of a synthetic resin made of vinyl chloride or the like has been shown, but the connecting pipe portion is formed from a synthetic resin such as vinyl chloride or polyethylene containing heat-expandable graphite or the like. May be.

  Further, like the smooth tube 29 of the embodiment, the smooth tube 29B of FIG. 6 and the like, an inner layer 33 of a gap is provided between the inner peripheral side connecting tube portion 19 and the smooth tubes 29 and 29B are attached to the tube body 11. You may comprise so that it may assemble | attach and may form so that the inner layer 33 which consists of the space | gap for soundproofing may be formed in the pipe joints 10 and 10B. Incidentally, when the inner layer 33 of such a gap is formed, a flange portion 29f that extends inward from the inner peripheral edge of the upper end 29a and the lower end 29b and hits the connecting pipe portion 19 is formed like a smooth tube 29G shown in FIG. Provided (see the two-dot chain line in FIG. 5), an inner layer 33 made of a gap may be formed between the upper and lower flanges 29f. Of course, a functional material for preventing extension, soundproofing and vibration isolation such as glass wool or rock wool may be provided in the space. In addition, as long as a space | gap can be stably formed in the outer peripheral side of the connection pipe part 19, you may provide the collar part 29f in the one side of the upper end 29a or the lower end 29b.

  Further, in the embodiment, the case where the upper stepped portion 17 and the lower stepped portion 25 of the pipe main body 11 are constituted by the receiving portions 15 and 22 for coupling the connecting pipe portion 19 is shown. The upper stepped portion and the lower stepped portion are not limited to the receiving portion, and may be portions protruding to the outer peripheral side in the vicinity of the upper portion 2a and the lower portion 2b of the penetrating portion 2 of the slab 1 in the pipe body.

  Further, the pipe body is not limited to a pipe joint, and the pipe body includes an upper step portion and a lower step portion that protrude to the outer peripheral side near the upper portion 2a and the lower portion 2b of the penetrating portion 2 of the slab 1. If this is the case, the present invention can be applied, and the material of the tube main body is not limited to synthetic resin, and may be formed of metal.

  Furthermore, the fitting groove 22c of the lower step portions 25 and 25B of the pipe joints 10 and 10B shown in FIGS. 1 and 6 and the structure of the protrusion 29e of the smooth tube 29C shown by the two-dot chain line of FIG. They may be formed on the upper step portions 17 and 17B and the upper end 29a side of the smooth tube 29C in correspondence with the smooth tubes and the upper step portions, respectively.

  Further, in the pipe joints 10B and 10C shown in FIGS. 6 and 7, the smooth pipes 29B and 29C are configured to cover substantially the entire outer periphery of both the upper step portions 17B and 17C and the lower step portions 25B and 25C. However, the smooth tube may be configured to cover the entire outer periphery or a part of the outer periphery of one of the upper step portion and the lower step portion.

  In addition, when the smooth tube covers both outer peripheries of the upper step portion and the lower step portion, in other words, the smooth tube covers both the outer peripheries of the upper joint portion and the lower joint portion. In this case, each of the receiving portions of the upper joint portion and the lower joint portion is configured as an insertion port portion that is inserted into the inner peripheral side of the smooth tube and connected to the smooth tube, and the outer periphery of the insertion port portion. A receiving surface capable of receiving the upper and lower end surfaces of the smooth tube may be provided on the surface side. In such a structure, if the upper joint part, smooth pipe, and lower joint part are connected, the outer dimensions are made uniform from the vicinity of the upper joint part to the lower joint part. In addition, a smooth tube is arranged on the outer surface side, and can be configured as a slab embedded portion structure of a tubular body that can be easily pulled out from the slab, and it is possible to omit the above-described connecting tube portion, The smooth tube can also be used as the connecting tube portion. Incidentally, in the case of such a structure, the inner peripheral surface of the insertion port of the lower joint portion located on the inner peripheral surface side of the smooth tube is not to cause a step that becomes drainage resistance. It is desirable to form in the shape of a taper surface that expands upward.

  DESCRIPTION OF SYMBOLS 1 ... Slab, 2 ... Penetration part, 3 ... (Backfill material) Mortar 10, 10A, 10B, 10C ... (Tube) Pipe joint, 11, 11A, 11B, 11C ... Pipe main body, 17, 17B, 17C ... (Lower receiving port portion) Upper stepped portion, 19 ... Connecting pipe portion, 22b (Upper surface) upper end surface, 25, 25A, 25B, 25C ... (Upper receiving port portion) Lower stepped portion, 29, 29A, 29B, 29C, 29D, 29E, 29F, 29G ... smooth tube, 29c ... abutment seat, 30 ... divided body, 31, 32, 33 ... inner layer, DU ... outer diameter (upper step), DD ... (lower step) Outer diameter dimension, DM ... outer diameter dimension (of a smooth pipe), DB ... outer diameter dimension (of a pipe joint covered with a smooth pipe).

Claims (7)

In the state where the pipe for drainage is buried by the backfill material, the pipe slab buried part structure that penetrates the through part of the slab,
The pipe body is configured to include a pipe body that allows drainage to flow down, and a smooth pipe that is assembled to the outer peripheral side of the pipe body to smooth the outer peripheral surface,
The tube body is
An upper step portion and a lower step portion that are arranged near the upper portion and the lower portion of the penetrating portion and project to the outer peripheral side,
A connecting pipe portion having an outer diameter smaller than an outer diameter of the upper step portion and the lower step portion, disposed at an arrangement position of the backfill material between the upper step portion and the lower step portion; ,
Configured with
The smooth tube is capable of being pulled out upward from the through-hole in the tubular body, so that the outer diameter on the outer peripheral surface side from the upper step portion to the lower step portion is uniform. Assembled on the outer circumference,
A tubular slab buried portion structure, wherein the tubular body is buried in the penetrating portion.   The smooth tube is configured by disposing a contact seat that contacts the upper surface side of the lower step portion at the lower end corresponding to the upper surface side of the lower step portion. The slab buried part structure of the tubular body according to 1.   The said smooth tube is assembled | attached to the outer peripheral side of the said connection pipe part between the said upper level | step difference part and the said lower level | step difference part of the said pipe | tube main body, The Claim 1 or Claim 2 characterized by the above-mentioned. Tube slab buried part structure.   The said smooth tube is assembled | attached to the outer peripheral side of the said connection pipe part including the outer periphery of at least one of the said upper level | step-difference part of the said pipe | tube main body, and the said lower level | step difference part. The slab embedding part structure of the tubular body according to claim 2.   The slab embedding part structure according to any one of claims 1 to 4, wherein the smooth tube is formed as an integral cylindrical shape.   The said smooth tube is formed from the division body divided | segmented along the circumferential direction, The slab embedding part structure of the pipe body of any one of Claim 1 thru | or 4 characterized by the above-mentioned.   The smooth tube is provided with an inner layer having at least one function of preventing fire spread, soundproofing, or vibrationproofing on the inner peripheral side. The slab embedding part structure of a tubular body according to any one of claims 6 to 7.

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