Pipe joint cover, drainage collecting pipe, and piping structure

Abstract

To provide a pipe joint cover, a drainage collecting pipe, and a piping structure having excellent workability.SOLUTION: A pipe joint cover covering an upper pipe of a drainage collecting pipe installed in a penetration hole of a floor slab of a building and formed in a sheet-like shape with a right-left length capable of being wrapped around substantially the entire circumference of the outer circumferential part of the upper pipe comprises an opening for externally exposing a branch pipe connection part provided at least at one of 12 o'clock, 3 o'clock, and 6 o'clock radial directions of the outer circumferential part of the upper pipe. The opening includes a first opening provided at a first end portion on one side in the right-left length direction and a second opening provided at a second end portion on the other side in the right-left length direction. When wrapped around the upper pipe, the first opening and the second opening form a single branch pipe insertion hole through which the common branch pipe connection part is inserted, and the first end portion and the second end portion are configured to be connectable at the same radial position as the branch pipe connection part when viewed from a pipe core of the upper pipe.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a pipe joint cover, a drainage manifold, and a piping structure of the drainage manifold, which are constructed in a drainage pipe of a building such as an apartment house.

Background Art

[0002] In drainage pipes of apartment houses, office buildings, etc., a method of covering pipe joints such as drainage manifolds for the purpose of sound insulation and heat insulation is known. The pipe joint cover (main pipe cover) disclosed in Patent Document 1 is formed in a rectangular strip shape that can be wound around the entire outer peripheral surface of the main pipe portion of the drainage manifold, and has one or more openings through which the branch pipe portion of the drainage manifold can be inserted, and a hook-and-loop fastener for connecting and fixing the side ends when wound around the main pipe portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above pipe joint cover, a loop surface and a hook surface of a hook-and-loop fastener are provided on the outer surface of one side end and the inner surface of the other side end, respectively. The opening is provided between the loop surface and the hook surface. Therefore, when the pipe joint cover is attached to the drainage manifold, the hook-and-loop fastener is joined at a location on the outer peripheral surface of the main pipe portion where the branch pipe portion is not provided (branch pipe non-formation portion) with the branch pipe portion inserted through the opening.

[0005] However, generally, in this type of drainage manifold, the branch pipe non-formation portion of the main pipe portion is constructed facing the wall. Therefore, when attaching the pipe joint cover to the main pipe portion, it is necessary to join the hook-and-loop fastener in a narrow space between the branch pipe non-formation portion and the wall, which is time-consuming for the work.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a pipe joint cover, a drainage collecting pipe, and a piping structure that are excellent in workability.

Means for Solving the Problems

[0007] The present invention employs the following technical means in order to achieve the above object.

[0008] A pipe joint cover according to one aspect of the present invention is a pipe joint cover that covers an upper pipe of a drainage collecting pipe constructed in a through hole of a building floor slab, and is formed in a sheet shape having a left-right length that can be wound around substantially the entire circumference of the outer peripheral portion of the upper pipe. An opening is provided for exposing an external branch pipe connection portion provided in at least one of the 0 o'clock direction, 3 o'clock direction, and 6 o'clock direction in the radial direction of the outer peripheral portion. The opening includes a first opening provided at a first end portion on one side in the left-right length direction and a second opening provided at a second end portion on the other side in the left-right length direction. When wound around the upper pipe, the first opening and the second opening form a single branch pipe insertion hole through which the common branch pipe connection portion is inserted, and the first end portion and the second end portion are configured to be connectable at the same radial position as the branch pipe connection portion when viewed from the pipe core of the upper pipe.

[0009] A connecting portion is provided for overlapping and connecting the first end portion and the second end portion in the radial direction of the outer peripheral portion when wound around the outer peripheral portion. The second opening is formed with a notch at a side edge of the second end portion. When wound around the outer peripheral portion, the second opening may form the branch pipe insertion hole by overlapping the first opening from the radial direction of the outer peripheral portion.

[0010] The connecting portion may be provided on both sides in the vertical width direction sandwiching the branch pipe insertion hole at the overlapping portion of the first end portion and the second end portion when wound around the outer peripheral portion.

[0011] When it is wound around the outer peripheral portion, it is provided with a joint portion that joins the side edges of the first end portion and the second end portion by butting them against each other in the circumferential direction of the outer peripheral portion. The first opening is formed as a notch in the side edge of the first end portion, and the second opening is formed as a notch in the side edge of the second end portion. When wound around the outer peripheral portion, the first opening and the second opening may be arranged side by side in the circumferential direction of the outer peripheral portion to form the branch pipe insertion hole.

[0012] The drain collecting pipe according to one aspect of the present invention is a drain collecting pipe constructed in a through hole of a building floor slab, and includes an upper pipe extending upward from the through hole above the floor slab, a lower pipe extending into the through hole from the lower part of the upper pipe, a branch pipe connection portion extending from the outer peripheral portion of the upper pipe in at least one of the radial 0 o'clock direction, 3 o'clock direction, and 6 o'clock direction, a sheet-like upper pipe cover wound around and attached to the outer peripheral portion of the upper pipe to cover the upper pipe, and a sheet-like lower pipe cover wound around and attached to the outer peripheral portion of the lower pipe to cover the lower pipe. The upper pipe cover is provided with openings for exposing the common branch pipe connection portion to the outside at a first end portion and a second end portion that are circumferential end portions, respectively. The first end portion and the second end portion are connected at the same radial position as the branch pipe connection portion when viewed from the pipe core of the upper pipe.

[0013] The upper pipe cover may be arranged in a state where the lower edge abuts against the upper edge of the lower pipe cover at the standard mounting position where the center of the opening is aligned with the center of the branch pipe connection portion.

[0014] The upper pipe cover may be arranged at the same vertical height position as the lowermost part of the branch pipe connection portion at the standard mounting position where the center of the opening is aligned with the center of the branch pipe connection portion.

[0015] The upper edge of the lower pipe cover may be arranged at the same vertical height position as the lowermost part of the branch pipe connection portion.

[0016] The piping structure according to one aspect of the present invention is a piping structure of a drainage manifold constructed in a through-hole of a building floor slab, wherein the drainage manifold includes an upper pipe and a lower pipe connecting a riser pipe, one or more branch pipe connection parts connecting a horizontal branch pipe, a sheet-like upper pipe cover wound around and attached to the outer peripheral part of the upper pipe to cover the upper pipe, and a sheet-like lower pipe cover wound around and attached to the outer peripheral part of the lower pipe to cover the lower pipe. The upper pipe extends upward from the through-hole above the floor slab, the lower pipe extends into the through-hole from below the upper pipe, the branch pipe connection part extends at least in one of the 0 o'clock direction, 3 o'clock direction, and 6 o'clock direction in the radial direction from the outer peripheral part of the upper pipe above the floor slab, the upper pipe cover is provided with openings at a first end and a second end that are circumferential end parts to expose the common branch pipe connection part to the outside, and the first end and the second end are connected at the same radial position as the branch pipe connection part when viewed from the pipe core of the upper pipe.

[0017] In a state where the drainage manifold is constructed at a predetermined vertical height position with respect to the floor slab and the center of the opening is aligned with the center of the branch pipe connection part, the lower edge of the upper pipe cover may be arranged at the same vertical height position as the upper surface of the floor slab.

Advantages of the Invention

[0018] According to the above pipe joint cover, drainage manifold, and its piping structure, when attaching the pipe joint cover to the upper pipe of the drainage manifold, the ends can be connected to each other at the location where the branch pipe connection part is provided on the outer peripheral part of the upper pipe, so the workability is improved. Therefore, the workability is improved.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0020] The pipe joint cover, drainage collecting pipe, and piping structure of the drainage collecting pipe according to the embodiments of the present invention will be described with reference to the drawings.

[0021] <First Embodiment> As shown in Fig. 1, the drain collecting pipe 1 of the first embodiment is a pipe joint of a drainage pipeline constructed by being inserted into a through hole (pipe hole) F1 of the floor slab F in a multi-story building such as an apartment building or an office building. The piping structure of the first embodiment is the piping structure of the drain collecting pipe 1. The pipe joint cover 2 of the first embodiment is an upper pipe cover that covers the upper pipe 3 of the drain collecting pipe 1 (hereinafter, the pipe joint cover 2 of the first embodiment is also appropriately referred to as the "upper pipe cover 2").

[0022] The drain collecting pipe 1 has an upper pipe 3, a lower pipe 4, a branch pipe connection part 5, an upper pipe cover 2, and a lower pipe cover 6. The upper pipe 3 is a tubular body that is open at the top and bottom and is connected to the upper end of the lower pipe 4. The lower pipe 4 is a tubular body that is open at the top and bottom and is connected to the lower end of the upper pipe 3. In this way, the upper pipe 3 and the lower pipe 4 are connected vertically to form the main pipe part of one drain collecting pipe 1.

[0023] The upper pipe 3 extends upward from the pipe hole F1 above the floor slab F. A riser connection part 7 is provided at the upper end of the upper pipe 3. The lower pipe 4 extends downward from the lower part of the upper pipe 3 and is disposed within the pipe hole F1. A riser connection part 8 is provided at the lower end of the lower pipe 4.

[0024] One or more branch pipe connection parts 5 are provided on the outer peripheral part of the upper pipe 3. A riser E1 extending above and below the floor slab F is connected to each of the riser connection parts 7 and 8. A horizontal branch pipe E2 extending along the upper surface F2 of the floor slab F is connected to the branch pipe connection part 5.

[0025] The drain collecting pipe 1 of the first embodiment is a single-branch drain collecting pipe with one branch pipe connection part 5 provided on the outer peripheral part of the upper pipe 3. This branch pipe connection part 5 is provided at a position where the lowermost outer peripheral lower end 5U is at substantially the same height as the joint part J of the upper pipe 3 and the lower pipe 4.

[0026] The drain collecting pipe 1 may be a three-branch drain collecting pipe having three branch pipe connection parts 5, or may be a two-branch drain collecting pipe having two branch pipe connection parts 5. Specifically, for example, as shown in FIG. 2, in the case of the three-branch drain collecting pipe of the first embodiment, the branch pipe connection part 5 extends in three directions of the radial 0 o'clock direction P1, 3 o'clock direction P2, and 6 o'clock direction P3 on the outer peripheral part of the upper pipe 3 with a predetermined one radial direction as the 0 o'clock direction P1 with respect to the pipe core PC of the upper pipe 3. Further, in the case of the two-branch drain collecting pipe of the first embodiment, the branch pipe connection part 5 extends in two directions of the radial 0 o'clock direction P1 and 3 o'clock direction P2 on the outer peripheral part of the upper pipe 3, or in two directions of the radial 0 o'clock direction and 6 o'clock direction P3.

[0027] Generally, this type of drain collecting pipe 1 is constructed such that a branch pipe non-forming part where the branch pipe connection part 5 is not provided on the outer peripheral part of the upper pipe 3 faces the wall G. As shown in FIGS. 1 and 2, for example, in the case of the above three-branch drain collecting pipe, the 9 o'clock direction P4 in the radial direction of the upper pipe 3 is constructed facing the wall G.

[0028] Further, the drain collecting pipe 1 of the first embodiment is constructed with the outer peripheral lower end (lowermost part) 5U of the branch pipe connection part 5 grounded on the upper surface F2 of the floor slab F. According to this construction method, the joint part J between the upper pipe 3 and the lower pipe 4 is set at the same height position as the upper surface F2 of the floor slab F. Note that the drain collecting pipe 1 may be constructed with the outer peripheral lower end (lowermost part) 5U of the branch pipe connection part 5 floating from the upper surface F2 of the floor slab F. In this case, the joint part J between the upper pipe 3 and the lower pipe 4 is set at a height position above the upper surface F2 of the floor slab F.

[0029] The upper pipe cover 2 of the first embodiment is wound around the outer peripheral part of the upper pipe 3 of the drain collecting pipe 1 constructed by the rolling pipe as described above, and the ends 11 and 12 are connected to each other at the same radial position as the branch pipe connection part 5 on the outer peripheral surface (here, the radial 0 o'clock direction P1 as viewed from the pipe core PC of the upper pipe 3). That is, the upper pipe cover 2 of the first embodiment is a retrofit type cover that is wound around the existing drain collecting pipe 1 for construction.

[0030] As shown in FIGS. 3 to 5, the upper pipe cover 2 is formed in a substantially rectangular sheet shape. Hereinafter, in the description of the unfolded state of the upper pipe cover 2, the length direction (the directions indicated by the arrows X1 and X2 in FIGS. 3 to 5) will be described as the left-right direction, the width direction (the directions indicated by the arrows Y1 and Y2 in FIGS. 3 to 5) will be described as the up-down direction, and the thickness direction (the directions indicated by the arrows Z1 and Z2 in FIGS. 3 to 5) will be described as the front-back direction.

[0031] The upper pipe cover 2 has a left end portion 11, a right end portion 12, an upper end portion 13, and a lower end portion 14. The left-right length (total cover length) D1 of the upper pipe cover 2 is set to a length that can be wound around substantially the entire outer peripheral portion of the upper pipe 3. Specifically, when the upper pipe cover 2 is wound around the outer peripheral portion of the upper pipe 3, the left end portion (first end portion) 11 and the right end portion (second end portion) 12, which are the circumferential end portions, are set to a length that overlaps the outer peripheral portion of the upper pipe 3 from the radial direction within a predetermined range. The up-down width (total cover width) W1 of the upper pipe cover 2 is set to a width that can cover the entire upper pipe 3 including the riser connection portion 7.

[0032] The base portion of the upper pipe cover 2 is configured by laminating a plurality of sheet materials. The upper pipe cover 2 of the first embodiment includes a sound-absorbing sheet 15 as an inner layer and a sound-insulating sheet 16 as an outer layer. Further, the upper pipe cover 2 has an opening 17, a connecting portion 18, and a cut portion 19.

[0033] The sound-absorbing sheet 15 is formed of a material having high sound-absorbing and flexible properties, such as glass wool and urethane foam. The sound-absorbing sheet 15 is formed in a substantially rectangular sheet shape having a greater thickness than the sound-insulating sheet 16, and has a left end portion 21, a right end portion 22, an upper end portion 23, and a lower end portion 24.

[0034] The left-right length (sound-absorbing sheet length) D2 of the sound-absorbing sheet 15 is set to be smaller than the overall length D1 of the cover. Specifically, the sound-absorbing sheet 15 is set to have a length such that when it is wound around the outer peripheral portion of the upper tube 3, the end faces of the left and right end portions 21 and 22 are in contact with each other in the circumferential direction. Incidentally, if the sound-absorbing property of the upper tube cover 2 is not significantly impaired, the sound-absorbing sheet 15 may be set to have a length such that when it is wound around the outer peripheral portion of the upper tube 3, the end faces of the side end portions 21 and 22 face each other in the circumferential direction with a slight gap therebetween.

[0035] The up-down width (sound-absorbing sheet width) W2 of the sound-absorbing sheet 15 is set to be smaller than the overall width W1 of the cover. The sound-absorbing sheet 15 is disposed so as to overlap the front surface (inner surface) of the sound-insulating sheet 16 with the left end portion 21 thereof being aligned with the left end portion 25 of the sound-insulating sheet 16 and the lower end portion 24 thereof being aligned with the lower end portion 28 of the sound-insulating sheet 16. That is, the sound-absorbing sheet 15 is disposed along the lower left corner portion of the sound-insulating sheet 16, and an extension portion S composed of only one layer of the sound-insulating sheet 16 is formed at the right end portion 12 and the upper end portion 13 of the upper tube cover 2. The right end portion of this extension portion S becomes an overlapping portion that is disposed so as to overlap the rear surface (outer surface) of the left end portion 11 from the radially outer side when the upper tube cover 2 is wound around the outer peripheral portion of the upper tube 3. Further, the upper end portion of the extension portion S becomes a constriction portion that allows the diameter reduction of the upper end portion 13, which will be described later, when the upper tube cover 2 is wound around the outer peripheral portion of the upper tube 3.

[0036] The sound-absorbing sheet 15 is stitched and fixed to the sound-insulating sheet 16. Specifically, the sound-absorbing sheet 15 is stitched and fixed to the sound-insulating sheet 16 at two locations, namely, the left end portion 21 and the right end portion 22. Incidentally, if the flexibility of the upper tube cover 2 is not impaired, the sound-absorbing sheet 15 may be, for example, adhesively fixed to the front surface of the sound-insulating sheet 16 with an adhesive or welded and fixed to the front surface thereof. Alternatively, the sound-absorbing sheet 15 may be adhesively held by an adhesive portion provided on the front surface of the sound-insulating sheet 16 or frictionally joined to a rough surface portion provided on the front surface thereof.

[0037] The sound insulation sheet 16 is formed of a material with high sound insulation and flexibility, such as soft vinyl chloride or aluminum. The sound insulation sheet 16 is formed in a substantially rectangular sheet shape with a thickness smaller than that of the sound absorption sheet 15, and has a left end portion 25, a right end portion 26, an upper end portion 27, and a lower end portion 28.

[0038] The sound insulation sheet 16 constitutes the entire outer shape of the upper pipe cover 2. That is, the length of the sound insulation sheet 16 coincides with the overall cover length D1, and the width of the sound insulation sheet 16 coincides with the overall cover width W1. Therefore, when the sound insulation sheet 16 is wound around the outer peripheral portion of the upper pipe 3, the front surface (inner surface) of the extension portion S of the right end portion 26 overlaps the rear surface (outer surface) of the left end portion 25 from the outer peripheral diameter direction of the upper pipe 3.

[0039] The opening 17 includes a first opening 17A and a second opening 17B. The first opening 17A is provided at the left end portion 11 on one side in the length direction of the upper pipe cover 2. The second opening 17B is provided at the right end portion 12 on the other side in the length direction of the upper pipe cover 2. The first opening 17A is formed by penetrating the sound absorption sheet 15 and the sound insulation sheet 16 in the front-rear (inner-outer) direction. On the other hand, the second opening 17B is formed by penetrating the extension portion S of the sound insulation sheet 16.

[0040] The first opening 17A has a circular hole portion 31 and a notch hole portion 32. The circular hole portion 31 is formed in a circular shape with a diameter slightly larger than the outer diameter of the branch pipe connection portion 5. The notch hole portion 32 is formed by extending from the circular hole portion 31 to the edge of the lower end portion 14 of the upper pipe cover 2. Therefore, when the upper pipe cover 2 is wound around the outer peripheral portion of the upper pipe 3, the branch pipe connection portion 5 can be smoothly guided from the notch hole portion 32 to the center of the circular hole portion 31 of the first opening 17A.

[0041] The upper pipe cover 2 of the first embodiment is wound around and attached to the outer peripheral portion of the upper pipe 3 with the center position L1 in the left - right direction of the circular hole portion 31 of the first opening 17A aligned with the center of the branch pipe connection portion 5 in the 0 - o'clock direction P1. In this way, for the upper pipe cover 2 of the first embodiment, the mounting position where the branch pipe connection portion 5 in the 0 - o'clock direction P1 of the upper pipe 3 is inserted through the center of the circular hole portion 31 of the first opening 17A becomes the standard mounting position.

[0042] Similar to the first opening 17A, the second opening 17B also has a circular hole portion 31 and a notch hole portion 32. The circular hole portion 31 is formed as a circle with a diameter slightly larger than the outer diameter of the branch pipe connection portion 5. The notch hole portion 32 is formed to extend from the circular hole portion 31 to the edge of the lower end portion 14 of the upper pipe cover 2.

[0043] The inner peripheral edge of the circular hole portion 31 of the second opening 17B lies on the edge of the right - hand end portion 22 of the sound - insulating sheet 16. That is, the second opening 17B is formed as a notch in the lower - right corner portion of the upper pipe cover 2, including the edge (side edge) of the right - hand end portion 12 of the upper pipe cover 2. Thereby, when the upper pipe cover 2 is wound around the outer peripheral portion of the upper pipe 3, the branch pipe connection portion 5 can be smoothly guided from the outside of the edge of the right - hand end portion 12 to the center of the circular hole portion 31 of the second opening 17B.

[0044] The distance between the center position L2 of the second opening 17B and the center position L1 of the first opening 17A in the left - right direction is set to be approximately the same as the outer peripheral length of the upper pipe 3. That is, the second opening 17B is arranged in parallel with the first opening 17A with an interval corresponding to approximately one - full turn of the outer periphery of the upper pipe 3.

[0045] Therefore, with the center position L1 of the first opening 17A aligned with the 0 o'clock direction P1 of the upper pipe 3, by wrapping the upper pipe cover 2 around the outer peripheral portion of the upper pipe 3, the center position L2 of the second opening 17B is aligned with the 0 o'clock direction P1, and it overlaps the first opening 17A from the outside in the radial direction of the upper pipe 3. In this way, when the upper pipe cover 2 is wrapped around the outer peripheral portion of the upper pipe 3, the first opening 17A and the second opening 17 overlap and are connected in the radial direction at the outer peripheral portion, forming a single branch pipe insertion hole for inserting the common branch pipe connection portion 5.

[0046] The vertical center positions LC of the circular hole portions 31 of the first opening 17A and the second opening 17B are set to be the same. The vertical distance W3 from the center position LC of the circular hole portion 31 to the edge (lower edge) of the lower end portion 14 of the upper pipe cover 2 is set to be the same as the distance from the center of the branch pipe connection portion 5 to the outer peripheral lower end 5U. Therefore, when the upper pipe cover 2 is properly attached to the standard attachment position of the drain collecting pipe 1, the lower edge of the upper pipe cover 2 is arranged at the same vertical height position as the outer peripheral lower end 5U of the branch pipe connection portion 5.

[0047] In the case of the upper pipe cover 2 used for the three-branch drain collecting pipe, the opening 17 includes, in addition to the first opening 17A and the second opening 17B, a third opening 17C and a fourth opening 17D. The third opening 17C is formed in the same hole shape as the first opening 17A. Also, both the third opening 17C and the fourth opening 17D are formed by penetrating the sound-absorbing sheet 15 and the sound-insulating sheet 16 back and forth, similar to the first opening 17A.

[0048] The lateral separation distance between the center position L3 of the third opening 17C and the center position L1 of the first opening 17A is set to be approximately 1 / 4 of the length of the outer periphery of the upper pipe 3. That is, the third opening 17C is arranged parallel to the right of the first opening 17A with an interval of approximately 1 / 4 of the outer periphery of the upper pipe 3.

[0049] The lateral separation distance between the center position L4 of the fourth opening 17D and the center position L3 of the third opening 17C is set to approximately 1 / 4 of the length of the outer circumference of the upper pipe 3. That is, the fourth opening 17D is arranged parallel to the right of the third opening 17C with an interval of approximately 1 / 4 of the outer circumference of the upper pipe 3.

[0050] In this way, the first opening 17A, the third opening 17C, and the fourth opening 17D are arranged in parallel at an interval of approximately 1 / 4 of the outer circumference of the upper pipe 3 at the lower end 14 of the upper pipe cover 2. Therefore, if the upper pipe cover 2 is wound around the outer peripheral portion of the upper pipe 3 with the center position L1 of the first opening 17A aligned with the 0 o'clock direction P1, the third opening 17C will be aligned with the center of the branch pipe connection portion 5 in the 3 o'clock direction P2, and the fourth opening 17D will be aligned with the center of the branch pipe connection portion 5 in the 6 o'clock direction P3.

[0051] The vertical center positions LC of the circular hole portions 31 of the third opening 17C and the fourth opening 17D are respectively set to be the same as the vertical center positions LC of the circular hole portions 31 of the other openings 17A and 17B.

[0052] The connecting portion 18 is a hook-and-loop fastener and has a first connecting half-body 18A and a second connecting half-body 18B. The first connecting half-body 18A is a rectangular strip having a loop surface and is provided at the left end 11 of the upper pipe cover 2. Specifically, the first connecting half-body 18A is provided above (above the center position L1) the first opening 17A on the rear surface (outer peripheral surface) of the left end 11.

[0053] The second connecting half-body 18B is a rectangular strip having a hook surface and is provided at the right end 12 of the upper pipe cover 2. Specifically, the second connecting half-body 18B is provided above (above the center position L1), that is, on one side in the vertical width direction of the second opening 17B, on the front surface (inner peripheral surface) of the right end 12.

[0054] Therefore, when the connecting portion 18 wraps the upper pipe cover 2 around the outer peripheral portion of the upper pipe 3, the end portions 11 and 12 of the upper pipe cover 2 are connected by overlapping them in the radial direction of the outer peripheral portion at the left - right center positions L1 and L2 of the first opening 17A and the second opening 17B.

[0055] In addition, the connecting portion 18 may have a hook surface on the first connecting half - body 18A and a loop surface on the second connecting half - body 18B. Also, when the upper pipe cover 2 is wrapped around the outer peripheral portion of the upper pipe 3, as long as the left - hand end portion (first end portion) 21 and the right - hand end portion (second end portion) 22 can be overlapped and connected in the radial direction of the outer peripheral portion, it is not limited to a hook - and - loop fastener. For example, it may be an adhesive tape provided on the front surface of the extension portion S of the sound - insulating sheet 16 or on the overlapping surface side of the front surface (the rear surface of the left - hand end portion 21). 。

[0056] The cut portions 19 are formed in plurality at a predetermined interval in the left - right direction at the edge of the upper end portion 13 of the upper pipe cover 2. That is, the cut portions 19 are formed in plurality at a predetermined interval in the left - right direction at the upper end portion of the extension portion S of the sound - insulating sheet 16. Thus, since the upper pipe cover 2 of the first embodiment is provided with a plurality of cut portions 19 at the upper end portion of the extension portion S of the sound - insulating sheet 16, after being wrapped around the outer peripheral portion of the upper pipe 3 as shown in FIG. 1, the upper end portion 13 can be subjected to a diameter - reducing process to form a substantially frustum - of - a - cone shape in accordance with the step at the connection portion between the riser connection portion 7 and the riser E1.

[0057] In addition, the constricted portion of the upper pipe cover 2 diameter - reduced as described above is fixed to the riser E1 by an adhesive tape or the like. Also, the overlapping portion of the upper pipe cover 2 (the right - hand end portion of the extension portion S of the sound - insulating sheet 16) connected by the connecting portion 18 as described above may be further fixed by an adhesive tape or the like.

[0058] As shown in FIG. 6, the lower pipe cover 6 has a first cover portion 33 and a second cover portion 34. The first cover portion 33 is formed in a substantially rectangular sheet shape. The second cover portion 34 is formed in an arcuate sheet shape having a predetermined width and is continuously provided below the first cover portion 33.

[0059] The lower pipe cover 6 of the first embodiment is wound around the outer peripheral portion of the lower pipe 4 of the drainage collecting pipe 1 before construction, and the ends 35, 36 of the first cover portion 33, the ends 37, 38 of the second cover portion 34, and the upper and lower split ends of the first cover portion 33 and the second cover portion 34 are connected and attached to each other at predetermined positions on the outer peripheral surface by an adhesive tape or the like. After the lower pipe cover 6 is attached to the drainage collecting pipe 1 as described above, the pipe installation hole F1 is constructed.

[0060] In addition, the lower pipe 4 of the drainage collecting pipe 1 of the first embodiment has a cylindrical upper pipe portion 4A extending downward from the lower end of the upper pipe 3, and a substantially conical cylindrical lower pipe portion 4B whose diameter decreases as it extends downward from the lower end of the upper pipe portion 4A. The lower pipe cover 6 is attached by winding the first cover portion 33 around the outer peripheral portion of the upper pipe portion 4A and winding the second cover portion 34 around the outer peripheral portion of the lower pipe portion 4B.

[0061] Hereinafter, in the description of the unfolded state of the lower pipe cover 6, the length direction of the first cover portion 33 (the direction indicated by the arrows X1, X2 in FIG. 6) is the left-right direction, the width direction (the direction indicated by the arrows Y1, Y2 in FIG. 6) is the up-down direction, and the thickness direction (the direction indicated by the arrows Z1, Z2 in FIG. 6) orthogonal to both the length direction and the width direction is the front-rear direction for explanation.

[0062] The left-right length D4 of the first cover portion 33 is set to a length that can be wound around substantially the entire circumference of the outer peripheral portion of the upper pipe portion 4A. Specifically, when the first cover portion 33 is wound around the outer peripheral portion of the lower pipe 4, the first cover portion 33 is set to a length such that the end faces of the left end portion 35 and the right end portion 36, which are the circumferential end portions, are in contact with each other in the circumferential direction.

[0063] The vertical width W4 of the first cover part 33 is set to be substantially the same as the vertical width of the upper cylindrical part 4A. Therefore, when the lower pipe cover 6 is wound around the outer peripheral part of the lower pipe 4, the upper edge (upper end edge) of the upper end part 39 thereof is arranged at the same vertical height position as the joint part J, that is, at the same vertical height position as the outer peripheral lower end (lowermost part) 5U of the branch pipe connection part 5. Also, as described above, by attaching the upper pipe cover 2 to the outer peripheral part of the upper pipe 3, the lower end edge of the upper pipe cover 2 is arranged in a state of being butted against the upper edge of the upper end part 39 of the lower pipe cover 6.

[0064] In addition, in the drainage manifold 1 of the first embodiment, the difference between the outer diameter of the upper pipe 3 and the outer diameter of the lower pipe 4 is set to be small. Therefore, when the upper pipe cover 2 and the lower pipe cover 6 are properly attached to the drainage manifold 1 as described above, the butted edges are in contact with each other in the vertical direction (or, due to the vertical displacement of the two covers 2 and 6, they face each other with a slight gap in the vertical direction). On the other hand, when the difference between the outer diameter of the upper pipe 3 and the outer diameter of the lower pipe 4 is large, the difference in the winding diameters of the upper pipe cover 2 and the lower pipe cover 6 also becomes large. Therefore, the opposing edges thereof are arranged with a predetermined gap in the radial direction. However, since all of the above butted edges are arranged at substantially the same position as the outer peripheral lower end 5U of the branch pipe connection part 5 as described above, they do not overlap in the radial direction.

[0065] The upper side length D5 of the second cover part 34 is set to a length that can be wound around substantially the entire circumference of the outer periphery of the upper end of the lower cylindrical part 4B. The lower side length D6 of the second cover part 34 is set to a length that can be wound around substantially the entire circumference of the outer periphery of the lower end of the lower cylindrical part 4B. That is, the second cover part 34 is set to a length such that when it is wound around the outer peripheral part of the lower pipe 4, the end faces of the left end part 37 and the right end part 38, which are the circumferential end parts thereof, are in contact with each other in the circumferential direction. The width (length corresponding to the generatrix) W5 of the second cover part 34 is set to be substantially the same as the generatrix length of the outer peripheral surface of the lower cylindrical part 4B.

[0066] The lower pipe cover 6 is formed by laminating a plurality of sheet materials. The lower pipe cover 6 of the first embodiment includes a sound-absorbing sheet 41 as an inner layer and a sound-insulating sheet 42 as an outer layer, similar to the base portion of the upper pipe cover 2. The sound-absorbing sheet 41 of the lower pipe cover 6 is formed with the same thickness and material as the sound-absorbing sheet 15 of the upper pipe cover 2. The sound-insulating sheet 42 of the lower pipe cover 6 is formed with the same thickness and material as the sound-insulating sheet 16 of the upper pipe cover 2.

[0067] <Second Embodiment> As shown in FIG. 7, the drainage manifold 1 of the second embodiment has an upper pipe 3, a lower pipe 4, a branch pipe connection portion 5, an upper pipe cover 2 as a pipe joint cover, and a lower pipe cover 6. The drainage manifold 1 of the second embodiment is different from the drainage manifold 1 of the first embodiment in that the upper pipe 3 and the upper pipe cover 2 are different. Hereinafter, the drainage manifold 1 of the second embodiment will be described focusing on the points different from the drainage manifold 1 of the first embodiment.

[0068] The upper pipe 3 of the second embodiment is formed longer upward than the upper pipe 3 of the first embodiment. The upper pipe 3 of the second embodiment is a single-branch drainage manifold with one branch pipe connection portion 5 provided on the outer peripheral portion of the upper pipe 3. The branch pipe connection portion 5 is provided at a position near the upper end of the outer peripheral portion of the upper pipe 3. Further, the drainage manifold 1 of the second embodiment is constructed such that the joint portion J between the upper pipe 3 and the lower pipe 4 is at the same height position as the upper surface F2 of the floor slab F.

[0069] The drain collecting pipe 1 may also be a three-branch drain collecting pipe having three branch pipe connection parts 5, or a two-branch drain collecting pipe having two branch pipe connection parts 5, similar to the drain collecting pipe 1 of the first embodiment. Specifically, for example, as shown in FIG. 8, in the case of the three-branch drain collecting pipe of the second embodiment, with the extension direction of the first branch pipe connection part (branch pipe connection part) 5A provided on the upper end side of the upper pipe 3 as viewed from the pipe core PC of the upper pipe 3 as the reference 0 o'clock direction P1, the other second branch pipe connection part (branch pipe connection part) 5B extends in the radial 3 o'clock direction P2 and 9 o'clock direction P4 on the outer peripheral part of the lower end side of the upper pipe 3. Also, in the case of the two-branch drain collecting pipe of the second embodiment, with the extension direction of the first branch pipe connection part 5A as the reference 0 o'clock direction P1, the second branch pipe connection part 5B extends in the radial 3 o'clock direction P2 or 9 o'clock direction P4 on the outer peripheral part of the lower end side of the upper pipe 3. Each of the above second branch pipe connection parts 5B is provided at a height where the outer peripheral lower end (lowermost part) 5U is grounded on the upper surface F2 of the floor slab F.

[0070] As shown in FIGS. 9 and 10, the upper pipe cover 2 is formed in a substantially rectangular sheet shape that is longer in the vertical direction than the upper pipe cover 2 of the first embodiment. Hereinafter, in the description of the unfolded state of the upper pipe cover 2, the length direction (the direction indicated by the arrows X1, X2 in FIGS. 9 and 10) will be described as the left-right direction, the width direction (the direction indicated by the arrows Y1, Y2 in FIGS. 9 and 10) will be described as the up-down direction, and the thickness direction (the direction indicated by the arrows Z1, Z2 in FIGS. 9 and 10) will be described as the front-back direction.

[0071] The overall cover width W1 of the upper pipe cover 2 of the second embodiment is larger than the overall cover width W1 of the upper pipe cover 2 of the first embodiment, and is set to a width that can cover the entire upper pipe 3 including the riser connection part 7. Similarly, the sound absorption sheet width W2 of the sound absorption sheet 15 of the second embodiment is set to be larger than the sound absorption sheet width W2 of the sound absorption sheet 15 of the first embodiment.

[0072] Of the openings 17, both the first opening 17A and the second opening 17B are formed in a circular shape. The first opening 17A is arranged closer to the center of the cover (right side) than the edge of the left end 11 of the upper pipe cover 2. The upper pipe cover 2 of the second embodiment is wound around and attached to the outer peripheral portion of the upper pipe 3 with the center position L1 in the left - right direction of the first opening 17A aligned with the center of the first branch pipe connection portion 5A. In this way, for the upper pipe cover 2 of the second embodiment, the mounting position where the first branch pipe connection portion 5A in the 0 - o'clock direction P1 of the upper pipe 3 is inserted through the center of the first opening 17A becomes the standard mounting position.

[0073] The inner peripheral edge of the second opening 17B abuts on the edge of the right end 12 of the upper pipe cover 2 (the right end 22 of the sound - insulating sheet 16). That is, the second opening 17B is provided in a state where a part of the edge of the right end 12 of the upper pipe cover 2 is cut out. Therefore, when the upper pipe cover 2 is wound around the outer peripheral portion of the upper pipe 3, the first branch pipe connection portion 5A can be smoothly guided from the outside of the edge of the right end 12 to the center of the second opening 17B.

[0074] The vertical center positions LC1 of the first opening 17A and the second opening 17B are set to be the same. The vertical distance W6 from the center position LC1 to the edge (lower end edge) of the lower end 14 of the upper pipe cover 2 is set to be the same as the distance from the center of the first branch pipe connection portion 5A to the joint portion J. Therefore, when the upper pipe cover 2 is properly attached to the standard mounting position of the drainage collecting pipe 1, the lower end edge of the upper pipe cover 2 is arranged at the same vertical height position as the joint portion J. As a result, the lower end edge of the upper pipe cover 2 is arranged in contact with the upper end edge of the lower pipe cover 6.

[0075] In the case of the upper pipe cover 2 used for the three - branch drainage collecting pipe, the opening 17 includes, in addition to the first opening 17A and the second opening 17B, a third opening 17C and a fourth opening 17D. The third opening 17C and the fourth opening 17D are formed in the same hole shape as the first opening 17A of the first embodiment.

[0076] The first opening 17A, the third opening 17C, and the fourth opening 17D are all formed by penetrating the sound-absorbing sheet 15 and the sound-insulating sheet 16 in the front-rear (inside-outside) direction. The second opening 17B is formed by penetrating the extension part S of the sound-insulating sheet 16.

[0077] The vertical center positions LC2 of the third opening 17C and the fourth opening 17D are set to be the same. The vertical distance W7 from the center position LC2 to the edge (lower edge) of the lower end portion 14 of the upper pipe cover 2 is set to be the same as the distance from the center of the second branch pipe connection portion 5B to the joint portion J.

[0078] The lateral separation distance between the center position L3 of the third opening 17C and the center position L1 of the first opening 17A is set to be approximately 1 / 4 of the outer circumference length of the upper pipe 3. That is, the third opening 17C is arranged parallel to the right of the first opening 17A with an interval of approximately 1 / 4 of the outer circumference of the upper pipe 3.

[0079] The lateral separation distance between the center position L4 of the fourth opening 17D and the center position L2 of the second opening 17B is set to be approximately 1 / 4 of the outer circumference length of the upper pipe 3. That is, the fourth opening 17D is arranged parallel to the left of the second opening 17B with an interval of approximately 1 / 4 of the outer circumference of the upper pipe 3.

[0080] In this way, the first opening 17A and the third opening 17C, and the second opening 17B and the fourth opening 17D are respectively arranged in parallel at an interval of approximately 1 / 4 of the outer circumference of the upper pipe 3 in the upper pipe cover 2. Therefore, if the upper pipe cover 2 is wound around the outer peripheral portion of the upper pipe 3 with the center position L1 of the first opening 17A aligned with the 0 o'clock direction P1, the third opening 17C will be aligned with the center of the branch pipe connection portion 5 in the 3 o'clock direction P2, and the fourth opening 17D will be aligned with the center of the branch pipe connection portion 5 in the 9 o'clock direction P4. If the upper pipe cover 2 is wound around the outer peripheral portion of the upper pipe 3 with the center position L1 of the first opening 17A aligned with the 0 o'clock direction P1, the third opening 17C will be aligned with the center of the branch pipe connection portion 5 in the 3 o'clock direction P2, and the fourth opening 17D will be aligned with the center of the branch pipe connection portion 5 in the 9 o'clock direction P4.

[0081] The connecting part 18 is a hook-and-loop fastener and has a first connecting half-body 18A and a second connecting half-body 18B. The first connecting half-body 18A is a rectangular strip having a loop surface and is provided at the left end 11 of the upper pipe cover 2. Specifically, the first connecting half-body 18A is provided above and below (on the central position L1), that is, in both the upper and lower width directions of the second opening 17B, sandwiching the first opening 17A on the rear surface (outer peripheral surface) of the left end 11.

[0082] The second connecting half-body 18B is a rectangular strip having a hook surface and is provided at the right end 12 of the upper pipe cover 2. Specifically, the second connecting half-body 18B is provided above and below (on the central position L1) sandwiching the second opening 17B on the front surface (inner peripheral surface) of the right end 12.

[0083] Therefore, when the upper pipe cover 2 is wound around the outer peripheral portion of the upper pipe 3, the connecting part 18 connects the ends 11, 12 of the upper pipe cover 2 by overlapping them in the radial direction of the outer peripheral portion at the left-right central positions L1, L2 of the first opening 17A and the second opening 17B.

[0084] <The Third Embodiment> As shown in FIGS. 11 and 12, the drain collecting pipe 1 of the third embodiment has an upper pipe 3, a lower pipe 4, a branch pipe connection part 5, an upper pipe cover 2 as a pipe joint cover, and a lower pipe cover 6. The upper pipe cover 2 of the third embodiment is different from that of the first embodiment. Hereinafter, the drain collecting pipe 1 of the third embodiment will be described focusing on the differences from the drain collecting pipe 1 of the first embodiment.

[0085] As shown in FIGS. 13 and 14, the upper pipe cover 2 of the third embodiment is composed of a separate sound-absorbing sheet 15 as an inner layer and a sound-insulating sheet 16 as an outer layer, and the sound-absorbing sheet 15 and the sound-insulating sheet 16 are overlapped and wound around the drain collecting pipe 1.

[0086] Specifically, the upper pipe cover 2 of the third embodiment is wound around the outer peripheral portion of the upper pipe 3 of the drainage collecting pipe 1 before construction, and the end portions 11 and 12 are connected to each other by an adhesive tape or the like at the location where the branch pipe connection portion 5 is provided on the outer peripheral surface for construction. After the upper pipe cover 2 is attached as described above, the drainage collecting pipe 1 of the third embodiment is constructed in the piping hole F1. Hereinafter, in the description of the unfolded state of the upper pipe cover 2, the length direction (the directions indicated by the arrows X1 and X2 in FIGS. 13 and 14) is the left-right direction, the width direction (the directions indicated by the arrows Y1 and Y2 in FIGS. 13 and 14) is the up-down direction, and the thickness direction (the directions indicated by the arrows Z1 and Z2 in FIGS. 13 and 14) is the front-back direction for explanation.

[0087] As shown in FIG. 13, the sound absorption sheet 15 of the third embodiment has an opening 44 and a joint portion 45. Similar to the sound absorption sheet 15 of the first embodiment, the sound absorption sheet 15 is formed of a material having high sound absorption and flexibility, such as glass wool and urethane foam, and is formed in a substantially rectangular sheet shape having a greater thickness than the sound insulation sheet 16.

[0088] The left-right length (sound absorption sheet length) D7 of the sound absorption sheet 15 is set to be substantially the same as the outer peripheral length of the upper pipe 3. Therefore, when the sound absorption sheet 15 is wound around the outer peripheral portion of the upper pipe 3, the end faces of the left and right end portions 21 and 22 are in contact with each other in the circumferential direction. Incidentally, if the sound absorption performance of the upper pipe cover 2 is not significantly impaired, the sound absorption sheet 15 may be set to a length such that the end faces of the side end portions 21 and 22 face each other in the circumferential direction with a slight gap when wound around the outer peripheral portion of the upper pipe 3.

[0089] The up-down width (sound absorption sheet width) W7 of the sound absorption sheet 15 is set to be smaller than the up-down length from the upper end of the riser connection portion 7 to the joint portion J between the upper pipe 3 and the lower pipe 4. Incidentally, the sound absorption sheet 15 may be adhesively fixed to the front surface of the sound insulation sheet 16 with an adhesive, or may be welded and fixed to the front surface. Alternatively, the sound absorption sheet 15 may be adhesively held by an adhesive portion provided on the front surface of the sound insulation sheet 16, or may be frictionally joined to a rough surface portion provided on the front surface.

[0090] The opening 44 includes a first opening 44A and a second opening 44B. The first opening 44A is a substantially semi-circular notch formed at the edge of the left end 11 of the sound-absorbing sheet 15. The center position L1 in the left-right direction of the first opening 44A is set on the edge of the left end 11.

[0091] The second opening 44B is a substantially semi-circular notch that is line-symmetrical with the first opening 44A and is formed at the edge of the right end 12 of the sound-absorbing sheet 15. The center position L2 in the left-right direction of the second opening 44B is set on the edge of the right end 12.

[0092] Therefore, as shown in FIGS. 11 and 12, when the sound-absorbing sheet 15 is wound around the outer peripheral portion of the upper pipe 3, the first opening 44A and the second opening 44B overlap and are connected in the circumferential direction at the outer peripheral portion, forming a single branch pipe insertion hole through which the common branch pipe connection portion 5 is inserted. The sound-absorbing sheet 15 has a standard mounting position where the branch pipe connection portion 5 in the 0 o'clock direction P1 of the upper pipe 3 is inserted through the center of the branch pipe insertion hole defined by the first opening 44A and the second opening 44B as described above.

[0093] As shown in FIG. 13, the center positions LC in the up-down direction of the first opening 44A and the second opening 44B are set to be the same. The up-down distance W8 from the center position LC of each of the openings 44A, 44B to the edge (lower edge) of the lower end 24 of the sound-absorbing sheet 15 is set to be the same as the distance from the center of the branch pipe connection portion 5 to the outer peripheral lower end (lowest end) 5U. Therefore, when the sound-absorbing sheet 15 is properly mounted at the standard mounting position of the drain collecting pipe 1, the lower edge of the sound-absorbing sheet 15 is arranged at the same up-down height position as the outer peripheral lower end 5U of the branch pipe connection portion 5.

[0094] In the case of the sound-absorbing sheet 15 used for the three-branch drain collecting pipe, the opening 44 includes, in addition to the first opening 44A and the second opening 44B, a third opening 44C and a fourth opening 44D. Both the third opening 44C and the fourth opening 44D are notch holes having a circular basic shape, and are arranged in sequence with the third opening 44C and the fourth opening 44D to the right of the first opening 44A.

[0095] The lateral separation distance between the central position L3 of the third opening 44C and the central position L1 of the first opening 44A is set to approximately 1 / 4 of the outer circumference length of the upper tube 3. The lateral separation distance between the central position L4 of the fourth opening 44D and the central position L3 of the third opening 44C is set to approximately 1 / 4 of the outer circumference length of the upper tube 3. That is, the third opening 44C is arranged parallel to the right of the first opening 44A with an interval of approximately 1 / 4 of the outer circumference of the upper tube 3, and the fourth opening 44D is arranged parallel to the right of the third opening 44C with an interval of approximately 1 / 4 of the outer circumference of the upper tube 3.

[0096] In this way, the first opening 44A, the third opening 44C, and the fourth opening 44D are arranged parallel to the lower end portion 24 of the sound absorption sheet 15 at an interval of approximately 1 / 4 of the outer circumference of the upper tube 3. Therefore, if the sound absorption sheet 15 is wound around the outer peripheral portion of the upper tube 3 with the central position L1 of the first opening 44A aligned with the 0 o'clock direction P1, the third opening 44C will be aligned with the center of the branch pipe connection portion 5 in the 3 o'clock direction P2, and the fourth opening 44D will be aligned with the center of the branch pipe connection portion 5 in the 6 o'clock direction P3.

[0097] As shown in FIG. 14, the sound insulation sheet 16 of the third embodiment has an inner layer sheet 16A, an outer layer sheet 16B, and an opening 46. The inner layer sheet 16A is formed of a felt material such as polyethylene terephthalate or polyester. The outer layer sheet 16B is formed of a material with high sound insulation and flexibility, such as soft vinyl chloride or aluminum.

[0098] The left - right length (sound absorption sheet length) D8 of the sound insulation sheet 16 is set to be approximately the same as the outer diameter of the sound absorption sheet 15 when wound around the outer peripheral portion of the upper tube 3. Therefore, when the sound insulation sheet 16 is wound around the outer periphery of the sound absorption sheet 15, the end faces of the left and right end portions 25, 26 are in contact with each other in the circumferential direction.

[0099] The joint portion 45 is provided at the end portions 25, 26 in the longitudinal direction of the sound insulation sheet 16. The joint portion 45 has a so-called dovetail fitting structure, and includes a joint recess 45A and a joint protrusion 45B. The joint recess 45A is formed by a notch at the edge of the right end portion 26 of the sound insulation sheet 16. The joint protrusion 45B is formed to protrude at the edge of the left end portion 25 of the sound insulation sheet 16.

[0100] By fitting the joint recess 45A and the joint protrusion 45B to each other, the sound insulation sheet 16 is joined in a state where the edges of the left and right end portions 25, 26 abut against each other in the circumferential direction of the outer peripheral portion of the upper pipe 3. Incidentally, the left and right end portions 25, 26 of the sound insulation sheet 16 joined as described above are further fixed by an adhesive tape or the like.

[0101] The vertical width (sound absorption sheet width) W9 of the sound insulation sheet 16 is set to be substantially the same as the vertical length from the upper end of the riser connection portion 7 to the joint portion J between the upper pipe 3 and the lower pipe 4. Therefore, when the sound insulation sheet 16 is appropriately attached to the standard attachment position of the drainage manifold 1, it covers substantially the entire outer peripheral portion of the upper pipe 3 from the upper end of the riser connection portion 7 to the joint portion J.

[0102] The opening 46 includes a first opening 46A and a second opening 46B. The first opening 46A is a substantially semi-circular notch and is formed at the edge of the left end portion 25 of the sound insulation sheet 16. That is, the first opening 46A is formed by a notch at the edge of the left end portion 25 of the sound insulation sheet 16. The center position L1 in the left-right direction of the first opening 46A is set on the edge of the left end portion 25.

[0103] The second opening 46B is a substantially semi-circular notch that is line-symmetrical with the first opening 46A and is formed at the edge of the right end portion 26 of the sound insulation sheet 16. That is, the second opening 46B is formed by a notch at the edge of the right end portion 26 of the sound insulation sheet 16. The center position L2 in the left-right direction of the second opening 46B is set on the edge of the right end portion 26.

[0104] Therefore, as shown in FIGS. 11 and 12, when the sound insulation sheet 16 is wound around the outer peripheral portion of the upper pipe 3, the first opening 46A and the second opening 46B overlap and are connected in the circumferential direction at the outer peripheral portion, forming a single branch pipe insertion hole through which the common branch pipe connection portion 5 is inserted. The sound insulation sheet 16 has a standard mounting position where the branch pipe connection portion 5 in the 0 o'clock direction P1 of the upper pipe 3 is inserted through the center of the branch pipe insertion hole defined by the first opening 46A and the second opening 46B as described above.

[0105] As shown in FIG. 14, the vertical center positions LC of the first opening 46A and the second opening 46B are set to be the same. The vertical distance W10 from the center position LC of each of the openings 46A, 46B to the edge (lower edge) of the lower end portion 28 of the sound insulation sheet 16 is set to be larger than the distance from the center of the branch pipe connection portion 5 to the outer peripheral lower end (lowermost end) 5U. Therefore, when the sound insulation sheet 16 is appropriately attached to the standard attachment position of the drain collecting pipe 1, the lower edge of the sound insulation sheet 16 is arranged at a position below the outer peripheral lower end 5U of the branch pipe connection portion 5.

[0106] In addition, as shown in FIG. 11, in the lower pipe cover 6 of the third embodiment, the vertical width W11 of the first cover portion 33 is set to be smaller than the vertical width of the upper cylindrical portion 4A of the lower pipe 4. Therefore, when the lower pipe cover 6 is wound around the outer peripheral portion of the lower pipe 4, the upper edge of its upper end portion 39 is arranged at a position below the joint portion J, that is, below the outer peripheral lower end (lowermost portion) 5U of the branch pipe connection portion 5. Further, as described above, when the lower pipe cover 6 is wound around the outer peripheral portion of the lower pipe 4, the first cover portion 33 is set to have a vertical width W11 such that its upper edge abuts against the edge (upper edge) of the lower end portion 28 of the sound insulation sheet 16.

[0107] As shown in FIG. 14, in the case of the sound insulation sheet 16 used for the three-branch drain collecting pipe, the opening 46 includes a third opening 46C and a fourth opening 46D in addition to the first opening 46A and the second opening 46B. Both the third opening 46C and the fourth opening 46D are circular through holes, and are arranged side by side in the order of the third opening 46C and the fourth opening 46D to the right of the first opening 46A.

[0108] At the lower part of the third opening 46C, a cut 48 extending from the third opening 46C to the lower end edge of the sound insulation sheet 16 is provided. Similarly, at the lower part of the fourth opening 46D, a cut 48 extending from the fourth opening 46D to the lower end edge of the sound insulation sheet 16 is provided.

[0109] The lateral separation distance between the center position L3 of the third opening 46C and the center position L1 of the first opening 46A is set to approximately 1 / 4 of the outer circumference length of the upper pipe 3. The lateral separation distance between the center position L4 of the fourth opening 46D and the center position L3 of the third opening 46C is set to approximately 1 / 4 of the outer circumference length of the upper pipe 3. That is, the third opening 46C is arranged parallel to the right of the first opening 46A with an interval of approximately 1 / 4 of the outer circumference of the upper pipe 3, and the fourth opening 46D is arranged parallel to the right of the third opening 46C with an interval of approximately 1 / 4 of the outer circumference of the upper pipe 3.

[0110] In this way, the first opening 46A, the third opening 46C, and the fourth opening 46D are arranged in parallel at the lower end portion 28 of the sound insulation sheet 16 at an interval of approximately 1 / 4 of the outer circumference of the upper pipe 3. Therefore, if the sound insulation sheet 16 is wound around the outer peripheral portion of the upper pipe 3 with the center position L1 of the first opening 46A aligned with the 0 o'clock direction P1, the third opening 46C is aligned with the center of the branch pipe connection portion 5 in the 3 o'clock direction P2, and the fourth opening 46D is aligned with the center of the branch pipe connection portion 5 in the 6 o'clock direction P3.

[0111] The opening 44 of the sound absorption sheet 15 and the opening 46 of the sound insulation sheet 16 overlap each other on the same center by overlapping the sound absorption sheet 15 and the sound insulation sheet 16, and constitute the opening 17 of the sound insulation sheet 16 of the third embodiment.

[0112] Specifically, by stacking the sound-absorbing sheet 15 and the sound-insulating sheet 16 one on top of the other, the first opening 44A of the sound-absorbing sheet 15 overlaps with the first opening 46A of the sound-insulating sheet 16 on the same center, forming the first opening 17A of the upper pipe cover 2 in the third embodiment. Also, the second opening 44B of the sound-absorbing sheet 15 overlaps with the second opening 46B of the sound-insulating sheet 16 on the same center, forming the second opening 17B of the upper pipe cover 2 in the third embodiment.

[0113] Also, in the case of the sound-absorbing sheet 15 and the sound-insulating sheet 16 used for the three-branch drainage collecting pipe, by stacking the sound-absorbing sheet 15 and the sound-insulating sheet 16 one on top of the other, the third opening 44C of the sound-absorbing sheet 15 overlaps with the third opening 46C of the sound-insulating sheet 16 on the same center, forming the third opening 17C of the upper pipe cover 2 in the third embodiment. Also, the fourth opening 44D of the sound-absorbing sheet 15 overlaps with the fourth opening 46D of the sound-insulating sheet 16 on the same center, forming the fourth opening 17D of the upper pipe cover 2 in the fourth embodiment.

[0114] As described above, the pipe joint cover 2 according to the embodiment of the present invention is a pipe joint cover 2 that covers the upper pipe 3 of the drainage collecting pipe 1 constructed in the through-hole F1 of the floor slab F of the building, formed in a sheet shape with a left-right length that can be wound around substantially the entire circumference of the outer peripheral portion of the upper pipe 3, and includes an opening 17 that exposes the branch pipe connection portion 5 provided at least in one of the 0 o'clock direction P1, 3 o'clock direction P2, and 6 o'clock direction P3 in the radial direction of the outer peripheral portion to the outside. The opening 17 includes a first opening 17A provided at a first end portion 11 on one side in the left-right length direction and a second opening 17B provided at a second end portion 12 on the other side in the left-right length direction. When wound around the upper pipe 3, the first opening 17A and the second opening 17B form a single branch pipe insertion hole through which the common branch pipe connection portion 5 is inserted, and the first end portion 11 and the second end portion 12 are configured to be connectable at the same radial position as the branch pipe connection portion 5 when viewed from the pipe core PC of the upper pipe 3.

[0115] According to this pipe joint cover 2, when the pipe joint cover 2 is attached to the drainage collecting pipe 1, the end portions 11 and 12 can be connected in a relatively wide space on the outer peripheral portion of the upper pipe 3 provided with the branch pipe connection portion 5, so that the workability is improved.

[0116] The pipe joint cover 2 of the above embodiment is provided with a connecting portion 18 that overlaps and connects the first end portion 11 and the second end portion 12 in the radial direction of the outer peripheral portion when wound around the outer peripheral portion. The second opening 17B is formed as a notch at the side edge of the second end portion 12. When wound around the outer peripheral portion, the second opening 17B forms the branch pipe insertion hole by overlapping and connecting with respect to the first opening 17A from the radial direction of the outer peripheral portion.

[0117] According to this pipe joint cover 2, the first opening 17A and the second opening 17B are connected by overlapping the end portions 11 and 12 of the pipe joint cover 2 from the radial direction of the outer peripheral portion of the upper pipe 3, and a branch pipe insertion hole through which the branch pipe connection portion 5 can be inserted is formed. Therefore, it is possible to smoothly attach the pipe joint cover 2 to the outer peripheral portion of the upper pipe 3. Thus, the workability is further improved.

[0118] The connecting portion 18 is provided on both sides in the vertical width direction sandwiching the branch pipe insertion hole at the overlapping portion S between the first end portion 11 and the second end portion 12 when wound around the outer peripheral portion.

[0119] According to this pipe joint cover 2, since the end portions 11 and 12 of the pipe joint cover 2 can be connected at the upper and lower positions of the branch pipe connection portion 5, it is possible to smoothly and surely attach the pipe joint cover 2 to the outer peripheral portion of the upper pipe 3. Thus, the workability is further improved.

[0120] The pipe joint cover 2 of the above embodiment is provided with a joining portion 45 that butts and joins the side edges of the first end portion 11 and the second end portion 12 in the circumferential direction of the outer peripheral portion when wound around the outer peripheral portion. The first opening 17A is formed as a notch on the side edge of the first end portion 11. The second opening 17B is formed as a notch on the side edge of the second end portion 12. When wound around the outer peripheral portion, the first opening 17A and the second opening 17B are arranged side by side in the circumferential direction of the outer peripheral portion to form the branch pipe insertion hole.

[0121] According to this pipe joint cover 2, by joining the end portions 11 and 12 of the pipe joint cover 2 in a butted state in the circumferential direction of the outer peripheral portion of the upper pipe 3, the first opening 17A and the second opening 17B are arranged side by side in the circumferential direction of the outer peripheral portion of the upper pipe 3, and the branch pipe insertion hole through which the branch pipe connection portion 5 can be inserted is formed. Therefore, it is possible to smoothly attach the pipe joint cover 2 to the outer peripheral portion of the upper pipe 3. Thus, the workability is further improved.

[0122] The drainage collecting pipe 1 according to the embodiment of the present invention is a drainage collecting pipe 1 constructed in the through hole F1 of the floor slab F of a building, an upper pipe 3 extending upward from the through hole F1 to above the floor slab F, a lower pipe 4 extending into the through hole F1 from below the upper pipe 3, a branch pipe connection portion 5 extending from the outer peripheral portion of the upper pipe 3 at least in one of the 0 o'clock direction P1, 3 o'clock direction P2, and 6 o'clock direction P3 in the radial direction, a sheet-shaped upper pipe cover 2 wound around and attached to the outer peripheral portion of the upper pipe 3 to cover the upper pipe, and a sheet-shaped lower pipe cover 6 wound around and attached to the outer peripheral portion of the lower pipe to cover the lower pipe. The upper pipe cover 2 is provided with openings 17 for exposing the common branch pipe connection portion 5 to the outside at a first end portion 11 and a second end portion 12 that are the circumferential end portions, respectively. The first end portion 11 and the second end portion 12 are connected at the same radial position as the branch pipe connection portion 5 when viewed from the pipe core PC of the upper pipe 3.

[0123] According to this drain collecting pipe 1, when the upper pipe cover 2 is attached to the outer peripheral portion of the upper pipe 3, the end portions 11 and 12 can be connected in a relatively wide space on the outer peripheral portion of the upper pipe 3 provided with the branch pipe connection portion 5, so that the workability is improved.

[0124] The upper pipe cover 2 is arranged in a state where the lower end edge abuts against the upper end edge of the lower pipe cover 6 at the standard mounting position where the center L1 of the opening 17 is aligned with the center of the branch pipe connection portion 5.

[0125] For example, if the lower end edge of the upper pipe cover 2 is configured to overlap the outer periphery of the upper end edge of the lower pipe cover 6, when the upper pipe cover 2 is retrofitted to the existing drain collecting pipe 1, the lower end edge of the upper pipe cover 2 interferes with the filling material or the like filled in the gap on the upper surface of the peripheral portion of the through hole F1 or the outer periphery of the lower pipe cover 6, and the lower edge portion may be distorted unnecessarily or the upper pipe cover 2 itself may be displaced upward.

[0126] However, according to the above drain collecting pipe 1, since the lower end edge of the upper pipe cover 2 is arranged in a state where it abuts against the upper end edge of the lower pipe cover 6, it is difficult to interfere with the upper surface of the peripheral portion of the through hole F1 or the like. Therefore, the workability is further improved.

[0127] The upper pipe cover 2 is arranged at the same vertical height position as the lowermost portion 5U of the branch pipe connection portion 5 at the standard mounting position where the center L1 of the opening 17 is aligned with the center of the branch pipe connection portion 5.

[0128] According to this drain collecting pipe 1, when the lowermost portion 5U of the branch pipe connection portion 5 is grounded on the upper surface F2 of the floor slab F for construction, it is difficult for the lower end edge of the upper pipe cover 2 to be pushed against the upper surface of the peripheral portion of the through hole F1 or the like and be deformed unnecessarily, or for the upper pipe cover 2 itself to be displaced upward. Therefore, the workability is further improved.

[0129] The upper end edge of the lower pipe cover 6 is arranged at the same vertical height position as the lowermost portion 5U of the branch pipe connection portion 5.

[0130] According to this drain collecting pipe 1, when constructing by grounding the lowermost part 5U of the branch pipe connection part 5 to the upper surface F2 of the floor slab F, the positions of the lower edge of the upper pipe cover 2 and the upper edge of the lower pipe cover 6 can be matched with the upper surface height of the floor slab F respectively, so the workability is further improved.

[0131] The piping structure of the drain collecting pipe 1 according to the embodiment of the present invention is a piping structure of the drain collecting pipe 1 constructed in the through hole F1 of the floor slab F of the building, wherein the drain collecting pipe 1 comprises an upper pipe 3 and a lower pipe 4 for connecting the riser pipe E1, one or a plurality of branch pipe connection parts 5 for connecting the horizontal branch pipe E2, a sheet-like upper pipe cover 2 wound around and attached to the outer peripheral part of the upper pipe 3 to cover the upper pipe 3, and a sheet-like lower pipe cover 6 wound around and attached to the outer peripheral part of the lower pipe 4 to cover the lower pipe 4, the upper pipe 3 extends upward from the through hole F1 above the floor slab F, the lower pipe 4 extends into the through hole F1 from below the upper pipe 3, the branch pipe connection part 5 extends at least in one of the 0 o'clock direction P1, 3 o'clock direction P2, and 6 o'clock direction P3 in the radial direction from the outer peripheral part of the upper pipe 3 above the floor slab F, the upper pipe cover 2 is provided with openings 17 for exposing the common branch pipe connection part 5 to the outside at a first end part 11 and a second end part 12 which are the circumferential end parts, and the first end part 11 and the second end part 12 are connected at the same radial position as the branch pipe connection part 5 when viewed from the pipe core PC of the upper pipe 3.

[0132] According to this piping structure, when the upper pipe cover 2 is attached to the upper pipe 3 of the drain collecting pipe 1, the end parts 11 and 12 can be connected at the position where the branch pipe connection part 5 is provided, so the working range required for the connection is relatively small. Therefore, the workability is improved.

[0133] The piping structure of the drain collecting pipe 1 of the above embodiment is In a state where the drainage manifold 1 is installed at a predetermined vertical height position with respect to the floor slab F and the center L1 of the opening 17 is aligned with the center of the branch pipe connection part 5, the lower edge of the upper pipe cover 2 is arranged at the same vertical height position as the upper surface F2 of the floor slab F.

[0134] According to this piping structure, when installing the upper pipe cover 2 on the drainage manifold 1 after constructing the drainage manifold 1 in the through-hole F1 of the floor slab F, it is difficult for the lower edge of the upper pipe cover 2 to be pushed by the upper surface of the peripheral part of the through-hole F1 or the like and be deformed unnecessarily, or for the upper pipe cover 2 itself to be displaced upward. Therefore, the workability is further improved.

[0135] As described above, the present invention has been explained. However, it should be considered that the disclosed embodiments are illustrative in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included.

Explanation of reference numerals

[0136] 1 Drainage manifold 2 Upper pipe cover (pipe joint cover) 3 Upper pipe 4 Lower pipe 5 Branch pipe connection part 6 Lower pipe cover 11 Left end of the upper pipe cover (first end) 12 Right end of the upper pipe cover (second end) 15 Sound absorption sheet 16 Sound insulation sheet 17 Opening 17A First opening 17B Second opening 18 Surface fastener (connection part) F Floor slab F1 Pipe hole (through-hole) F2 Upper surface P1 0 o'clock direction P2 3 o'clock direction P3 6 o'clock direction 9 o'clock direction of P4

Claims

1. A pipe joint cover that covers the upper pipe of a drainage collecting pipe constructed in a through hole of a building floor slab, It is formed in a sheet shape with a left - right length that can be wound around substantially the entire circumference of the outer peripheral portion of the upper pipe, It is provided with an opening for exposing to the outside a branch pipe connection portion provided in at least one of the 0 - o'clock direction, 3 - o'clock direction, and 6 - o'clock direction in the radial direction of the outer peripheral portion, The opening includes a first opening provided at a first end on one side in the left - right length direction and a second opening provided at a second end on the other side in the left - right length direction, When wound around the upper pipe, the first opening and the second opening form a single branch pipe insertion hole for inserting the common branch pipe connection portion, and the first end and the second end are configured to be connectable at the same radial position as the branch pipe connection portion when viewed from the pipe core of the upper pipe. A pipe joint cover.

2. It is provided with a connecting portion that overlaps and connects the first end and the second end in the radial direction of the outer peripheral portion when wound around the outer peripheral portion, The second opening is formed with a notch at the side edge of the second end, The pipe joint cover according to claim 1, wherein when wound around the outer peripheral portion, the second opening forms the branch pipe insertion hole by overlapping the first opening in the radial direction of the outer peripheral portion.

3. The pipe joint cover according to claim 2, wherein the connecting portion is provided on both sides in the vertical width direction sandwiching the branch pipe insertion hole at the overlapping portion of the first end and the second end when wound around the outer peripheral portion.

4. It is provided with a joining portion that butts and joins the side edges of the first end and the second end in the circumferential direction of the outer peripheral portion when wound around the outer peripheral portion, The first opening is formed with a notch at the side edge of the first end, The second opening is formed with a notch at the side edge of the second end, The pipe joint cover according to claim 1, wherein when wound around the outer peripheral portion, the first opening and the second opening form the branch pipe insertion hole by being arranged side by side in the circumferential direction of the outer peripheral portion.

5. A drainage collecting pipe constructed in a through hole of a building floor slab, An upper pipe extending upward from the through hole above the floor slab, A lower pipe extending into the through hole from below the upper pipe, A branch pipe connection portion extending from the outer peripheral portion of the upper pipe in at least one of the 0 - o'clock direction, 3 - o'clock direction, and 6 - o'clock direction in the radial direction, A sheet - shaped upper pipe cover that is wound around and attached to the outer peripheral portion of the upper pipe to cover the upper pipe, A sheet-like lower pipe cover that is wound around and attached to the outer peripheral portion of the lower pipe and covers the lower pipe. The upper pipe cover is provided with openings for exposing the common branch pipe connection portion to the outside at a first end portion and a second end portion that are circumferential end portions, respectively. The first end portion and the second end portion are connected at the same radial position as the branch pipe connection portion when viewed from the core of the upper pipe, which is a drain collecting pipe.

6. The drain collecting pipe according to claim 5, wherein the upper pipe cover is arranged in a state where the lower end edge abuts against the upper end edge of the lower pipe cover at a standard mounting position where the center of the opening is aligned with the center of the branch pipe connection portion.

7. The drain collecting pipe according to claim 5, wherein the upper pipe cover is arranged at the same vertical height position as the lowermost portion of the branch pipe connection portion at a standard mounting position where the center of the opening is aligned with the center of the branch pipe connection portion.

8. The drain collecting pipe according to claim 6 or 7, wherein the upper end edge of the lower pipe cover is arranged at the same vertical height position as the lowermost portion of the branch pipe connection portion.

9. A piping structure of a drain collecting pipe constructed in a through hole of a building floor slab, The drain collecting pipe An upper pipe and a lower pipe for connecting a riser pipe, One or more branch pipe connection portions for connecting a horizontal branch pipe, A sheet-like upper pipe cover that is wound around and attached to the outer peripheral portion of the upper pipe and covers the upper pipe, A sheet-like lower pipe cover that is wound around and attached to the outer peripheral portion of the lower pipe and covers the lower pipe, The upper pipe extends upward from the through hole above the floor slab, The lower pipe extends into the through hole from below the upper pipe, The branch pipe connection portion extends at least in one of the 0 o'clock direction, 3 o'clock direction, and 6 o'clock direction in the radial direction from the outer peripheral portion of the upper pipe above the floor slab, The upper pipe cover is provided with openings for exposing the common branch pipe connection portion to the outside at a first end portion and a second end portion that are circumferential end portions, respectively. The first end portion and the second end portion are connected at the same radial position as the branch pipe connection portion when viewed from the core of the upper pipe, which is a piping structure.

10. The piping structure according to claim 9, wherein in a state where the drain collecting pipe is constructed at a predetermined vertical height position with respect to the floor slab and the center of the opening is aligned with the center of the branch pipe connection portion, the lower end edge of the upper pipe cover is arranged at the same vertical height position as the upper surface of the floor slab.

Images