JP2014129674A - Drainage pipe fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage pipe fitting structure capable of suppressing cave-in of an opening peripheral edge of a foam resin base material.SOLUTION: Drainage pipe fitting structure 2 comprises: a foam resin base material 10 which has an opening penetrated in a thickness direction D1; a drainage pipe 30 which has a first flange 34 to be arranged on the side of one surface 10b of a peripheral edge 12 of the opening; and drainage pipe holding means 40 which has a second flange 44 to be arranged on the side of the other surface 10a of the peripheral edge 12 of the opening, in which the peripheral edge 12 of the opening enters between the first flange 34 and the second flange 44, the drainage pipe 30 engages into the drainage pipe holding means 40, and a range R2 in which pressure force in the thickness direction D1 is added from the second flange 44 is wider to the outside than a range R1 in which the pressure force in the thickness direction D1 is added from the first flange 34, with respect to the base material 10.

Description

  The present invention relates to a structure for attaching a distribution pipe such as a drain pipe to an opening of a base material.

  The bathroom floor is composed of a bathtub floor material and a washing floor material formed of non-foamed synthetic resin that is not actively foamed, such as SMC (Sheet Molding Compound). The bathtub floor material is a tray-like molded product installed under the bathtub, and has an opening for forming a drain outlet. An opening for forming a drain outlet for a drain trap is formed in the concave drainage basin formed at the bathtub side edge of the washing floor material. A drain pipe for discharging water (including hot water) is attached to the openings of these floor members by an annular fastening flange member made of hard resin. The drain pipe and the fastening flange member are provided with flanges at positions sandwiching the opening peripheral edge of the floor material. Therefore, when the fastening flange member is screwed into the drain pipe at the opening of the floor material to which the packing is attached, the opening peripheral edge of the floor material is sandwiched between the flange upper surface of the drain pipe and the flange lower surface of the fastening flange member via the packing. Is done. In addition, screwing means fitting a screw.

FIG. 8 shows a drainage pipe mounting structure with a drainage trap disclosed in Patent Document 1. In the drain outlet 901 of this drain pipe mounting structure, a flange member 904 is screwed into a trap body 902 constituting the drain pipe. The opening peripheral edge 911 of the washing floor material 910 is sandwiched between the upper surface of the flange 903 of the trap body 902 and the lower surface of the flange 905 of the flange member 904 via the packing 906.
As shown in FIG. 8, the outer edge of the flange 905 of the flange member 904 is set inside the outer edge of the flange 903 of the trap body 902. A pressing force in the thickness direction is applied from the flanges 903 and 905 to the opening peripheral edge portion 911 of the floor material via the packing 906. The contact range of the packing 906 on the upper side of the opening peripheral part 911 is the same as the contact range of the packing 906 on the lower side of the opening peripheral part 911.

JP 2000-80695 A

When assembling a bathroom on the floor of an apartment or the like, it is easier to carry in and out the members if the floor material is lightened. In order to lighten the floor material, it is conceivable to form the floor material with foamed resin. However, since a pressing force in the thickness direction of the floor material may be applied to the fastening flange member made of hard resin during construction, etc., if the floor material is made of foamed resin, the opening of the floor material is caused by the pressing force on the fastening flange member. The peripheral part may sink.
In addition, the problem mentioned above exists, when attaching drainage pipes other than a bathroom to the opening part of a base material, when attaching the water supply pipe for letting purified water pass to the opening part of a base material, etc.

  This invention has the objective of providing the novel water pipe attachment structure which solves the subject mentioned above.

The present invention comprises a foamed resin base material having an opening;
A water distribution pipe having a first flange disposed on one side of the peripheral edge of the opening;
A water pipe holding means having a second flange disposed on the other surface side of the peripheral edge of the opening,
The peripheral edge of the opening enters between the first flange and the second flange, the water distribution pipe and the water distribution pipe holding means are fitted,
A range in which the pressing force in the thickness direction from the second flange is applied to the base material is wider outside the range in which the pressing force in the thickness direction is applied from the first flange.

  Here, a range in which a pressing force from the flange to the thickness direction is applied to the base material is referred to as a pressing range. That is, since the pressing range by the second flange of the distribution pipe holding means is wider outside than the pressing range by the first flange of the distribution pipe, a pressing force in the base material thickness direction is applied to the distribution pipe holding means at the time of construction, etc. However, the surface pressure applied to the base material from the water distribution pipe holding means is small, and the base material is not easily depressed. Therefore, the said aspect can suppress that the opening peripheral part of the base material made from a foaming resin sinks, and can prolong the lifetime of a product.

In the invention according to each claim, the opening of the base material includes not only the opening not connected to the edge of the base material but also the opening connected to the edge of the base material.
The distribution pipe includes a drain pipe for passing drainage, a water supply pipe for passing purified water, and the like.
The water pipe holding means may be composed of a single member that cannot be separated or a plurality of members that can be separated. Each member to be separated may be disposed in contact with each other, or may be disposed through a member such as packing.
In order for the peripheral edge of the opening to enter between the first flange and the second flange, the opening peripheral edge is in contact with the flange, and a member such as packing is disposed between the flange and the open peripheral edge. Both are included.
The range in which the pressing force is applied from the flange includes a portion to which the pressing force is indirectly applied from the flange through a member such as packing, in addition to a portion to which the pressing force is applied from the flange that is in direct contact with the base material.

  By the way, the water distribution pipe holding means includes a tightening flange member and an area expansion member, and the tightening flange member is provided with a fitting portion with the water distribution pipe and an inner flange, and the area expansion member includes the inner flange and the area flange. A pressed part and an outer flange may be provided between the opening peripheral edge part. In this aspect, since the fastening flange member usable for the non-foamed resin base material can be used for the foamed resin base material, the members can be made common.

  The water distribution pipe holding means may be provided with a narrowing restricting portion extending toward the first flange between the first flange and the second flange. In this aspect, when the pressing force in the base material thickness direction is applied to the water distribution pipe holding means, it narrows and the restricting portion extends directly or indirectly to the side that abuts the water distribution pipe, so the water distribution pipe holding means and the water distribution pipe The amount of tightening can be regulated. Therefore, the crushing in the thickness direction at the opening peripheral edge of the base material can be suppressed, and the product life can be extended.

  In addition, inventions, such as a bathroom, a shower room, a bathroom vanity, a system kitchen, etc. which have the above-mentioned distribution pipe attachment structure also show the operation and effect mentioned above.

  ADVANTAGE OF THE INVENTION According to this invention, the water pipe attachment structure which can suppress that the opening peripheral part of the base material made from a foaming resin sinks can be provided.

(A) is the perspective view which illustrates the floor part 110 of the bathroom 100 which provided the drain pipe attachment structure 1, (b) is the vertical sectional view which cut | disconnected the bathroom floor part 110 in the position of A1-A1 of FIG. . 1 is an exploded perspective view illustrating a drain pipe attachment structure 1. FIG. (A) is a perspective view illustrating the appearance of the tightening flange member 50, (b) is a perspective view illustrating the appearance of the area enlarging member 60, and (c) is a perspective view illustrating the appearance of the drain pipe 30. 1 is a vertical cross-sectional view illustrating a drain pipe attachment structure 1. FIG. 2 is an exploded cross-sectional view illustrating a part of the drain pipe attachment structure 1. FIG. 3 is a vertical cross-sectional view illustrating the main part of the drain pipe attachment structure 1. FIG. It is a vertical sectional view showing drain pipe attachment structure 2 according to a modification. It is a vertical sectional view showing a drainage pipe mounting structure according to a conventional example.

  Embodiments of the present invention will be described below. Of course, the following embodiments are merely examples of the present invention, and all the features shown in the embodiments are not necessarily essential to the means for solving the invention.

(1) Description of the structure of the water pipe mounting structure:
Fig.1 (a) has shown the floor part 110 of the bathroom 100 which provided the drainage pipe attachment structure 1 as an example of a distribution pipe attachment structure. FIG.1 (b) has shown the vertical cross section which cut | disconnected the bathroom floor part 110 in the position of A1-A1 of FIG. The floor part 110 is divided into a bathtub floor part 120 on which the bathtub 140 is installed and a washing floor part 130 serving as a washing place.
A base material 10 made of foamed resin of the present technology is installed on the bathtub floor 120. Of course, a base material made of foamed resin may also be installed on the washing floor portion 130. The bathtub floor 120 is provided with a drain outlet 70 for allowing drainage from the bathtub 140 or the like to pass therethrough, and the drain pipe mounting structure 1 is provided. The drainage pipe (distribution pipe) 30 of the drainage pipe mounting structure 1 has a connection pipe 32 connected to the trap body 138 of the drainage trap 136.

  A concave drainage basin 132 is formed at the edge of the wash floor portion 130 on the bathtub floor portion 120 side. At the bottom of the drainage basin 132, a drainage port 134 for allowing drainage from the washing area to pass therethrough is provided, and a drainage trap 136 having a trap body 138 is attached. The trap body 138 serves as a sealed water storage section, and drainage from the drainage basin 132 and the connection pipe 32 flows to the discharge port 139 through the sealed water storage section.

FIG. 2 shows an exploded view of the drainage pipe mounting structure 1 provided on the bathtub floor 120. In FIG. 3, the external appearance of the fastening flange member 50, the area expanding member 60, and the drain pipe 30 is shown in an enlarged manner. FIG. 4 shows a vertical cross section of the drainage pipe mounting structure 1 taken along the position A1-A1 in FIG. FIG. 5 shows a vertical section in which the fastening flange member 50, the slip washer 25, the packing 20, the area expanding member 60, and the base material 10 are cut separately at positions A1-A1 in FIG. FIG. 6 shows a vertical section in which the main part of the drainage pipe mounting structure 1 is cut at the position A1-A1 in FIG.
The direction from the opening OP1 of the base material 10 toward the periphery is the outer direction D4, and the opposite direction is the inner direction D3.

  The drainage pipe mounting structure 1 includes a base material 10, a drainage pipe (water pipe) 30 having a first flange 34, and a water pipe holding means 40 having a second flange 44 as basic elements. The base material 10 is made of foamed resin, and has an opening OP <b> 1 for passing at least one of the drain pipe 30 and the water pipe holding means 40. The drain pipe 30 is disposed on the lower surface (one surface 10b) side of the peripheral edge portion 12 of the opening OP1. The water distribution pipe holding means 40 is disposed on the upper surface (other surface 10a) side of the peripheral edge portion 12 of the opening OP1. The drain pipe 30 and the water pipe holding means 40 are fitted with the peripheral edge 12 of the opening OP <b> 1 between the first flange 34 and the second flange 44. As shown in FIG. 6, the pressing range R2 to which the pressing force from the second flange 44 of the distribution pipe holding means to the thickness direction D1 is applied to the base material 10 from the first flange 34 of the drain pipe to the thickness direction D1. It is wider outside the pressing range R1 where the pressing force is applied.

The base material 10 shown in FIGS. 1-6 is a flooring material of the bathroom 100, and has opening OP1 penetrated to the thickness direction D1. A first flange 34 of the drain pipe 30 is disposed on the lower surface (one surface 10b) side of the peripheral edge portion 12 of the opening OP1. On the upper surface (other surface 10a) side of the peripheral edge 12 of the opening OP1, a second flange 44 of the water distribution pipe holding means 40 is disposed.
As a bathroom floor material, a molded product of a non-foamed synthetic resin that is not actively foamed such as FRP (glass fiber reinforced plastic) is often used, but the base material 10 of the present technology is a foamed resin called a foamed resin. It is considered as a molded product. Since the flooring material is made lighter by using the foamed resin, the flooring material can be easily carried in and out when the bathroom is assembled on the floor such as an apartment. Moreover, heat insulation performance is also improved by making a flooring into a foam material.

  The interval between the first flange 34 of the drain pipe 30 and the inner flange 54 of the fastening flange member 50 is set so as to sandwich the opening peripheral edge of the non-foamed synthetic resin flooring. When the base material is formed of a relatively soft foamed resin, the thickness of the general part of the base material is made thicker than the non-foamed synthetic resin molded product in order to maintain the strength. Therefore, the peripheral edge portion 12 of the opening OP1 is thinner than the other general portions 11. As shown in FIGS. 5 and 6, the peripheral edge portion 12 is divided into an outer thin portion 13 below the outer flange 64 of the area expanding member 60 and an inner thin portion 14 that is thinner than the outer thin portion 13. Although the lower surface of the outer thin portion 13 does not rise from the general portion 11, the upper surface of the outer thin portion 13 is slightly lower than the thickness of the outer flange 64 from the general portion 11. The lower surface of the inner thin portion 14 rises from the outer thin portion 13, and the upper surface of the inner thin portion 14 is lowered to a position where the upper surface of the inner flange 54 is slightly lower than the upper surface of the outer flange 64. Since the upper surface of the outer flange is slightly lowered from the upper surface of the general part and the upper surface of the inner flange is further slightly lowered, the drainage on the base material 10 flows from the general part 11 through the outer flange 64 toward the inner flange 54.

  The plastic that can be used for the base material 10 made of foamed resin may be a thermoplastic plastic such as polystyrene (PS) or polypropylene (PP), a thermosetting plastic, or an elastomer or an additive. As the foaming agent for the raw material plastic, a chemical foaming agent that generates a gas by a chemical reaction, a physical foaming agent such as an inert gas, or the like can be used. The foaming ratio of the base material is not particularly limited as long as the strength is sufficient, but can be 2 to 10 times, for example. Injection molding, cast molding, and the like can be employed for foam molding of the raw material plastic.

  The packing 20 is an elastic member formed in an annular shape in accordance with the opening OP1, and is formed in a substantially U-shaped cross section in which the outer side is opened and the upper part 20a and the lower part 20b are parallel. In the horizontal direction, the outer edge of the upper part 20a and the outer edge of the lower part 20b are at the same position. The inner thin portion 14 is inserted into the groove of the packing 20 together with the narrowing restricting portion 66 and the pressed portion 61 of the area expanding member 60. In the groove portion of the packing 20 shown in FIG. 5, a convex portion 21 is formed at a contact portion between the inner thin portion 14 and the area expanding member pressed portion 61. The packing 20 is only required to have a watertight function, and an elastomer molded product or the like can be used.

  The slip washer 25 is formed in an annular shape in accordance with the packing 20 and is disposed between the packing 20 and the inner flange 54. As the slip washer 25, a molded product such as acrylonitrile butadiene styrene copolymer (ABS), synthetic resin such as PP or PS, metal, or the like can be used.

  As shown in FIG. 3C, FIG. 4, and the like, the drain pipe 30 has a concave portion 31 that matches the opening OP <b> 1, and a female screw portion 31 a is formed on the inner surface of the concave portion 31. A connecting pipe 32 is formed at the bottom of the recess 31. A first flange 34 disposed on the lower surface side of the peripheral edge 12 extends from the outer surface 31b of the recess 31 in the outward direction D4. That is, the upper surface of the first flange 34 is a pressing surface 34 a that presses the inner thin portion 14 indirectly via the packing 20. For the drain pipe 30, a molded product such as synthetic resin such as ABS, PP or PS, metal, or the like can be used.

The water distribution pipe holding means 40 is divided into a fastening flange member 50 and an area expanding member 60.
As shown in FIG. 3A, FIG. 5 and the like, the fastening flange member 50 has a recess 51 that matches the opening OP1, and a male thread 51a is formed on the outer surface of the recess 51. The male screw part 51a is a fitting part with the drain pipe 30, and can be screwed with the female screw part 31a. An opening 52 is formed at the bottom of the recess 51 to allow drainage to pass through the drain pipe. An inner flange 54 disposed on the upper surface side of the opening peripheral edge 12 extends from the upper edge of the recess 51 in the outward direction D4. That is, the lower surface of the inner flange 54 is a pressing surface 54 b that indirectly presses the inner thin portion 14 via the slip washer 25 and the packing 20. For the fastening flange member 50, a molded product such as a thermoplastic plastic such as ABS, PP or PS, a thermosetting plastic, or the like can be used.

  As shown in FIG. 3B, FIG. 5, etc., the area expanding member 60 is formed in an annular shape in conformity with the inner flange 54, and is disposed on the upper surface side of the opening peripheral edge 12 outside the inner flange 54. 64 is formed. The lower surface of the outer flange 64 is a pressing surface 64 b that directly presses the outer thin portion 13. The second flange 44 of the water distribution pipe holding means 40 includes an inner flange 54 in the inner portion and an outer flange 64 in the outer portion. A stepped portion 62 extends downward from the inner edge of the outer flange 64, and a pressed portion 61 extends from the lower edge of the stepped portion 62 in the inward direction D3. The stepped portion 62 is located outside the outer edge of the inner flange 54, and the pressed portion 61 is disposed between the inner flange 54 and the opening peripheral edge portion 12.

From the inner edge part of the pressed part 61, it narrows toward the first flange 34 and a restricting part 66 extends. That is, the narrowing restricting portion 66 extends toward the first flange 34 between the first flange 34 and the second flange 44. The length L1 of the narrowing restricting portion 66 based on the lower surface of the pressed portion 61 is slightly shorter than the thickness T1 of the inner thin portion 14 of the substrate 10.
The material of the area expanding member 60 is preferably a material harder than the base material 10 such as non-foamed synthetic resin or metal in order to suppress the depression of the opening peripheral edge portion 12. For the area expanding member 60, a molded product such as a synthetic resin such as ABS, PP or PS, metal, or the like can be used.

The drainage pipe mounting structure 1 described above can be formed as follows, for example.
First, the area enlarging member 60 is disposed on the opening peripheral edge 12 of the base material 10. That is, the lower surface of the pressed portion 61 is brought into contact with the upper surface of the inner thin portion 14, and the lower surface of the outer flange 64 is brought into contact with the upper surface of the outer thin portion 13. At this time, the area expanding member 60 may be temporarily fixed to the opening peripheral portion 12 with a double-sided tape or the like, and the peripheral portion of the outer flange 64 may be coked with a caulking material in order to obtain water tightness.

Next, the packing 20 is attached to the openings of the base material 10 and the area expanding member 60. That is, the inner thin portion 14 and the pressed portion 61 are sandwiched between the packings 20.
Further, the slip washer 25 is disposed on the packing 20, the first flange 34 of the drain pipe 30 is brought into contact with the lower surface of the packing 20, and the opening peripheral edge portion 12 enters between the first flange 34 and the second flange 44. In this state, the fastening flange member 50 is fitted into the drain pipe 30. That is, the male screw portion 51a is screwed into the female screw portion 31a so that a pressing force in the thickness direction D1 is applied to the opening peripheral edge portion 12 from the first flange 34 and the second flange 44. A pressing force is indirectly applied to the lower surface of the opening peripheral edge 12 from the first flange 34 of the drain pipe via the packing 20. On the upper side of the opening peripheral edge 12, a pressing force is indirectly applied to the area-enlarged member pressed part 61 from the inner flange 54 of the tightening flange member via the slip washer 25 and the packing 20. A pressing force is directly applied to the upper surface from the area expanding member 60.

As shown in FIG. 6, the pressing range R <b> 1 where the pressing force is applied upward (thickness direction D <b> 1) from the first flange 34 of the drain pipe to the base material 10 is below the inner edge R <b> 1 i of the opening peripheral edge 12 and the packing 20. It is between the outer edge R1o of the side part. The range in which the pressing force is applied via the packing 20 is a range in which the packing 20 contacts the opening peripheral edge 12 when the convex portion 21 (see FIG. 5) is crushed.
A pressing range R2 to which a pressing force is applied downward (thickness direction D1) from the second flange 44 of the water distribution pipe holding means to the base material 10 is between the inner edge R2i of the opening peripheral edge 12 and the outer edge R2o of the area expanding member 60. Between. Accordingly, the pressing range R2 from the second flange 44 is wider outward than the pressing range R1 from the first flange 34.

(2) Explanation of action and effect of water pipe mounting structure:
Next, the operation and effect of the distribution pipe mounting structure will be described.
During construction of the bathroom, there is a possibility that a large pressing force in the thickness direction of the flooring may be applied to the tightening flange member due to an operator stepping on the tightening flange member or a load from the bathtub being applied to the tightening flange member. is there. When such a large pressing force is applied to the bathroom floor as shown in FIG. 8, the contact range of the packing 906 on the upper side of the opening peripheral edge 911 is the same as the contact range of the packing 906 on the lower side. When the flooring material is made of a relatively soft foamed resin, the opening peripheral edge of the flooring material may sink.

  On the other hand, in the drainage pipe mounting structure 1 of the present technology, the pressing range R2 by the second flange 44 of the distribution pipe holding means is wider outside the pressing range R1 by the first flange 34 of the drainage pipe. For this reason, even if a downward pressing force (thickness direction D1) is applied to the water distribution pipe holding means 40 during construction, the surface pressure applied to the base material 10 from the water distribution pipe holding means 40 is small, and the base material 10 is depressed. It has become difficult. Therefore, this technique can suppress that the opening peripheral part 12 of the base material 10 made of foamed resin sinks, and can provide the water pipe attachment structure which can prolong the life of a product. it can.

Moreover, since the water distribution pipe holding means 40 is divided into the fastening flange member 50 and the area expanding member 60, a fastening flange member that can be used for a non-foamed resin base material can be used for the foamed resin base material. . Therefore, the present technology can also achieve the effect of sharing the members.
Further, since the narrowing restriction portion 66 is provided between the first flange 34 and the second flange 44, the narrowing restriction portion 66 is sealed when the downward pressure (thickness direction D1) is applied to the water distribution pipe holding means 40. 20 indirectly hits the first flange 34 of the drain pipe. Thereby, the tightening amount of the tightening flange member 50 and the drain pipe 30 is regulated. Therefore, this technique can suppress the crushing and cracking more than necessary to the thickness direction D1 in the opening peripheral part 12 of the base material 10, and can further extend the life of the product. Can be provided.

(3) Modification:
Various modifications can be considered for the present invention.
For example, the installation location of the water pipe mounting structure may be various sanitary equipment rooms (such as a shower room, a washroom, and a toilet) including a bathroom, or a system kitchen. Accordingly, the water distribution pipe includes a water supply pipe and the like in addition to the drain pipe. In addition to the floor, the installation location of the water pipe mounting structure may be a ceiling, a side wall, or the like. That is, the base material includes a flooring material, a ceiling material, a wall material, and the like. The flow of water passing through the opening of the base material may be in the horizontal direction in addition to the downward direction.
The slip washer 25 described above can be omitted. The packing 20 can also be omitted if watertightness can be obtained with a caulking material or the like.

  FIG. 7 shows a vertical cross section in which a main part of a drainage pipe mounting structure (distribution pipe mounting structure) 2 of a modified example that does not use an area expanding member is cut at a position corresponding to A1-A1 in FIG. In this modification, the fastening flange member 50 itself constitutes the water distribution pipe holding means 40. In addition, about the same structure as FIGS. 1-6, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the tightening flange member 50 shown in FIG. 7, the second flange 44 arranged on the upper surface side of the opening peripheral edge portion 12 extends from the upper edge portion of the recess 51 in the outward direction D4. That is, the lower surface of the second flange 44 is a pressing surface 44 b that indirectly presses the opening peripheral edge 12 through the packing 20. Moreover, as for the packing 20 shown in FIG. 7, the upper side part 20a has come out outside the lower side part 20b. Therefore, the pressing range R2 to which the pressing force from the second flange 44 downward (thickness direction D1) is applied to the base material 10 is between the inner edge R2i of the opening peripheral edge 12 and the outer edge R2o of the upper portion 20a of the packing 20. It becomes. Accordingly, the pressing range R2 from the second flange 44 is wider outward than the pressing range R1 from the first flange 34.

  Also in this modified example, since the pressing range R2 is wider outside the pressing range R1, even if a downward pressing force (thickness direction D1) is applied to the distribution pipe holding means 40 during construction or the like, the distribution pipe holding means 40 The surface pressure applied to the base material 10 is small, and the base material 10 is difficult to sink. Therefore, it is possible to prevent the opening peripheral edge portion 12 of the base material 10 made of foamed resin from being depressed, and it is possible to provide a water pipe mounting structure capable of extending the life of the product.

If the upper surface of the outer thin portion 13 is made higher than the upper surface of the inner thin portion 14 by about the thickness of the packing upper portion 20a with respect to the opening peripheral edge portion 12, the upper surface of the outer thin portion 13 and the pressing surface 44b of the second flange 44 become Contact. Therefore, it is also possible to use the packing 20 in which the outer edges of the upper part 20a and the lower part 20b are in the same position as shown in FIGS.
A slip washer may be inserted between the packing 20 and the second flange 44.

  Further, a narrowing restriction portion 46 may be provided on the lower surface of the second flange 44 inside the packing 20. The narrowing restriction portion 46 is connected to the outer surface of the tightening flange member recess 51, but extends to the first flange 34 side between the first flange 34 and the second flange 44. When a downward pressing force (thickness direction D1) is applied to the water pipe holding means 40, the narrowing restricting portion 46 directly hits the drain pipe 30. Thereby, the tightening amount of the tightening flange member 50 and the drain pipe 30 is regulated. Therefore, this modification can suppress the crushing and cracking more than necessary in the thickness direction D1 in the opening peripheral edge portion 12 of the base material 10, and can be used to extend the life of the product. Structure can be provided.

(4) Conclusion:
As described above, according to the present invention, according to various aspects, it is possible to provide a technique or the like that can suppress the depression of the opening peripheral edge portion of the base material made of foamed resin. Needless to say, the above-described basic actions and effects can be obtained even with a technique that does not have the constituent requirements according to the dependent claims but includes only the constituent requirements according to the independent claims.
In addition, the configurations disclosed in the embodiments and modifications described above are mutually replaced, the combinations are changed, the known technology, and the configurations disclosed in the embodiments and modifications described above are mutually connected. It is possible to implement a configuration in which replacement or combination is changed. The present invention includes these configurations and the like.

1, 2 ... Drain pipe mounting structure (distribution pipe mounting structure),
DESCRIPTION OF SYMBOLS 10 ... Base material, 10a ... Other surface (upper surface), 10b ... One surface (lower surface), 11 ... General part,
12 ... peripheral edge part, 13 ... outer thin part, 14 ... inner thin part,
20 ... packing, 25 ... slip washer,
30 ... Drain pipe (distribution pipe), 31 ... Recess, 31a ... Female thread part, 31b ... Outer surface,
34 ... first flange, 34a ... pressing surface,
40 ... Water distribution pipe holding means, 44 ... Second flange, 44b ... Pressing surface, 46 ... Narrowing restriction part,
50 ... Tightening flange member, 51 ... Recess, 51a ... Male thread (fitting part),
54 ... Inner flange, 54b ... Pressing surface,
60 ... Area expansion member, 61 ... Pressed part, 62 ... Step part,
64 ... outer flange, 64b ... pressing surface, 66 ... narrowing restricting part,
100 ... Bathroom, 110 ... Floor part, 120 ... Bathtub floor part,
130: Washing floor, 140 ... Bathtub,
D1 ... thickness direction, D3 ... inward direction, D4 ... outward direction,
OP1 ... Opening,
R1, R2 ... pressing range, R1i, R2i ... inner edge, R1o, R2o ... outer edge.

Claims (3)

A base material made of foamed resin having an opening;
A water distribution pipe having a first flange disposed on one side of the peripheral edge of the opening;
A water pipe holding means having a second flange disposed on the other surface side of the peripheral edge of the opening,
The peripheral edge of the opening enters between the first flange and the second flange, the water distribution pipe and the water distribution pipe holding means are fitted,
A distribution pipe mounting structure, wherein a range in which a pressing force in the thickness direction from the second flange is applied to the base material is wider outside a range in which a pressing force in the thickness direction is applied from the first flange. The water pipe holding means is
A fastening flange member having a fitting portion with the water pipe and an inner flange that is an inner portion of the second flange;
The area expanding member having a pressed portion disposed between the inner flange and a peripheral edge portion of the opening, and an outer flange that is an outer portion of the second flange. The water distribution pipe mounting structure described.   3. The distribution pipe according to claim 1, wherein the water pipe holding means has a narrowing restricting portion extending toward the first flange between the first flange and the second flange. Water pipe mounting structure.

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