JP2012057763A - Soundproof device for drain pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct soundproof treatment to an existing drain pipe with superior workability and a high soundproof effect at working, and to reduce a feeling of oppression in a room after working.SOLUTION: A soundproof device 1 for drain pipe which conducts soundproof treatment to the existing drain pipe includes an upper soundproof material 11 covering a part other than a connection part, and a lower soundproof material 10 covering at least the connection part. A hard exterior material 19 of the lower soundproof material 10 is formed so as to be larger than a hard exterior material 32 of the upper soundproof material 11 so that a gap is formed between the drain pipe 100 and an interior material 27.

Description

  The present invention relates to a soundproofing device for soundproofing a drain pipe provided in, for example, a house.

  In general, for example, as shown in FIG. 4, a drain pipe 100 of a flush toilet installed in an apartment house is connected to straight pipes 101 and 102 extending from an upper floor to a lower floor, and a drain outlet of the toilet on each floor. And a branch pipe 103. Among new housings, new types of houses that are not very old are housed with pipes in the pipe space, making it difficult to hear the sound of drainage. In many cases, 100 is exposed in the toilet room and no soundproofing measures are taken. Such an exposed drain pipe has a problem that it is easy to hear the drainage sound and the resident feels uncomfortable. Especially at night, the surrounding noise becomes small, so the drainage sound becomes annoying.

  On the other hand, there is a method of newly providing a pipe space for accommodating the drain pipe in the room, but it is generally difficult to secure such a new space in the room, and even if the pipe space can be secured. Large-scale work is required and the cost is high.

  Therefore, a method of providing a soundproofing measure by attaching a soundproofing material to the drain pipe itself can be considered. As the soundproofing material used in this case, for example, a sheet-like material covering the drain pipe as disclosed in Patent Documents 1 and 2 is known. The soundproofing material of Patent Document 1 includes a sound insulating layer and a sound absorbing layer, and is wound in a state of being in close contact with the outer peripheral surface of the drain pipe. Moreover, the soundproof material of patent document 2 is wound around a drain pipe so that a space | gap part may be formed between the outer peripheral surfaces of a drain pipe.

Japanese Patent Laid-Open No. 10-8590 JP-A-2005-240911

  However, the soundproofing materials of Patent Documents 1 and 2 require an operation of winding around a drain pipe using an adhesive material or the like. The problem at this time is that the work itself using the adhesive material is complicated, and the space between the wall surface and the drain pipe is narrow when trying to wind around the existing drain pipe, so that the sound insulation material is wound. Is difficult to do.

  In addition, when the soundproof performance is compared between the case where the outer peripheral surface of the drain pipe is closely attached as in Patent Document 1 and the case where a gap is formed between the outer peripheral surface of the drain pipe as in Patent Document 2 As disclosed in Patent Document 2, it is possible to effectively prevent sound by forming the gap.

  However, if an air gap is formed between the drain pipe and the soundproofing material, the outer diameter of the soundproofing material increases and the soundproofing material gives a feeling of pressure in the room. I want to make it the smallest size that can get the damping effect.

  In addition, as shown in FIG. 4, the drainage pipe 100 has a connection part between the straight pipe 102 and the branch pipe 103, and this connection part is provided with flanges 102c, 103a, etc. Since the diameter is increased, the gap with the wall surface is further narrowed, and there is a possibility that the winding work of the soundproof material disclosed in Patent Documents 1 and 2 cannot be performed.

  In addition, since a step or the like is formed on the inner surface of the connecting portion between the straight pipe 102 and the branch pipe 103, the flow of drainage is likely to be disturbed at the connecting portion, and the emission degree of drainage sound is more than that of other portions. It tends to be large, and the soundproofing measures at the connecting part are more difficult than the soundproofing measures at other parts.

  The present invention has been made in view of such points, the purpose of which, when applying a soundproofing treatment to the existing drainage pipe, good workability during construction, obtaining a high soundproofing effect, And it is in reducing the feeling of pressure in the room after construction.

  In order to achieve the above-described object, the present invention provides a hard exterior material on each of the first soundproofing material that covers a portion other than the connection portion of the piping member and the second soundproofing material that covers at least the connection portion. The hard exterior material was made larger than the hard exterior material of the first soundproof material so as to form a gap between the hard exterior material and the piping member.

  1st invention is the sound insulation apparatus for drainage pipes for performing a soundproofing process to the existing drainage pipe to which the several piping member was connected, The 1st soundproofing material which covers parts other than the connection part of a piping member, and a piping member A second soundproofing material covering at least the connection portion, wherein the first soundproofing material comprises a sound absorbing material arranged to face the piping member and a sound insulating material arranged on the opposite side of the piping member of the sound absorbing material. A first interior material having a first hard exterior material that is molded in advance so as to cover the piping member and the first interior material is attached to the piping member side, and the second soundproofing material faces the piping member. And a second interior material having a sound-absorbing material and a sound-insulating material arranged on the opposite side of the pipe member of the sound-absorbing material, and pre-molded so as to cover the pipe member and on the pipe member side 2 The second hard exterior material to which the interior material is attached The second hard exterior material is formed larger than the first hard exterior material so as to accommodate the connection portion of the piping member and form a gap between the piping member and the second interior material. It is characterized by being.

  According to this configuration, since the sound absorbing material and the sound insulating material are attached to the first hard exterior material, the piping member is covered with the sound absorbing material and the sound insulating material by installing the exterior material. As described above, since the winding work using the adhesive material is not required at the time of construction, the sound absorbing material and the sound insulating material are covered with the piping member even when the gap between the piping member and the wall surface is narrow. So that it can be arranged easily. After the drainage sound radiated from the piping member is absorbed by the sound absorbing material, the sound is blocked by the sound insulating material to make it difficult to leak to the outside, and the drainage sound is also received when the piping member is accommodated in the first hard exterior material. Is difficult to leak to the outside. Thereby, a high soundproofing effect is obtained. The same applies to the second soundproofing material that covers the connecting portion of the piping member.

  Moreover, the 2nd hard exterior material of the 2nd soundproof material is large formed so that the connection part of a piping member may be accommodated, and the space | gap part is formed between the 2nd interior material and the piping member. Since the drainage sound attenuation effect is enhanced by the formation of the gap portion, it is possible to effectively take a soundproofing measure for the connecting portion, which tends to increase the degree of emission of the drainage sound. In forming the gap, since the shape for accommodating the connecting portion is used, unnecessary enlargement of the second soundproofing material is avoided. Thereby, the feeling of pressure in a room becomes small.

  In addition, the first soundproofing material can make the outer diameter smaller than that of the second soundproofing material because it does not cover the connecting portion of the piping member, and the feeling of pressure in the room is reduced.

  According to a second invention, in the first invention, the soundproofing material for the branch pipe covering the branch pipe portion of the piping member is provided, and the soundproofing member for the branch pipe is disposed so as to face the branch pipe, and the sound absorbing material A branch pipe interior material having a sound insulating material disposed on the side opposite to the branch pipe, and a branch pipe hard exterior material that is pre-formed so as to cover the branch pipe and on which the branch pipe interior material is attached. The branch pipe hard exterior material is connected to the second hard exterior material.

  According to this configuration, since the sound absorbing material and the sound insulating material are attached to the hard exterior material for the branch pipe, the sound absorbing material and the sound insulating material can be attached to the branch pipe even when the gap between the piping member and the wall surface is narrow at the time of construction. It becomes possible to arrange easily so that a part may be covered.

  Furthermore, since the branch pipe hard exterior material is connected to the second hard exterior material, the drainage sound radiated from the branch pipe portion is less likely to leak to the outside.

  A third invention is characterized in that, in the first or second invention, the first soundproof material and the second soundproof material are connected so as to be separable from each other.

  According to this structure, it becomes possible to convey and install a 1st soundproof material and a 2nd soundproof material separately indoors at the time of construction. Thereby, the workability | operativity with respect to the drain pipe in a narrow room improves, for example. Moreover, since it becomes possible to remove separately the 1st soundproof material and the 2nd soundproof material for the inspection and maintenance of a drain pipe, workability | operativity improves.

  According to a fourth invention, in any one of the first to third inventions, the first hard exterior material is configured by combining the first and second divided bodies divided in the radial direction of the piping member. It is characterized by.

  According to this configuration, at the time of construction, the first and second divided bodies are separated from each other, and the divided bodies are arranged so as to sandwich the piping member, and then coupled to each other to form the first soundproofing material. It becomes possible to do. Therefore, workability for a drain pipe in a particularly narrow room is improved.

  Moreover, when removing the first soundproofing material for the inspection and maintenance of the drain pipe, it is possible to easily remove the first and second divided bodies by separating them.

  According to a fifth invention, in any one of the first to fourth inventions, the second hard exterior material is provided with an open portion for inserting the piping member in the radial direction, and the open portion is a wall surface in the room. It is arrange | positioned so that it may be covered with.

  According to this structure, it becomes possible to insert a piping member into the inside of a 2nd soundproof material from the radial direction through the open part of a 2nd hard exterior material at the time of construction. And since the open part of a 2nd hard exterior material is covered by the indoor wall surface after construction, the leakage of drainage sound is suppressed.

  According to a sixth invention, in any one of the first to fifth inventions, the first soundproof material and the second soundproof material are formed so as to cover a piping member extending in a vertical direction, and the first soundproof material is the first soundproof material. 2 is disposed on the upper side of the soundproofing material, and the first soundproofing material is provided with a gap closing member for closing the gap between the upper end of the first soundproofing material and the indoor ceiling surface so as to be movable in the vertical direction. It is characterized by being.

  According to this configuration, when the size of the gap between the upper end of the first soundproof material and the ceiling surface differs depending on the construction site, the gap closing member is moved in the vertical direction, thereby ensuring various sizes of gaps. It becomes possible to occlude.

  According to 1st invention, the 1st sound insulation material which covers parts other than the connection part of a piping member, and the 2nd sound insulation material which covers at least the connection part of a piping member are equipped with the 1st and 2nd hard exterior material. Therefore, the winding work using the adhesive material becomes unnecessary, and the workability during construction can be improved. Furthermore, since the second hard exterior material accommodates the connecting portion of the piping member and is formed so as to form a gap between the piping member, the second hard exterior material is highly soundproof using the shape for accommodating the connecting portion. An effect can be acquired and the 1st soundproof material which covers parts other than the connection part of a piping member can be made into an outer diameter smaller than a 2nd soundproof material by the amount which does not cover a connection part at this time. Thereby, a feeling of pressure in the room after construction as the whole soundproofing device can be made small, ensuring high soundproofing performance.

  According to the second invention, the branch pipe soundproofing material covering the branch pipe part includes the branch pipe interior material having the sound absorbing material and the sound insulating material, and the branch pipe hard exterior material preliminarily molded so as to cover the branch pipe part. Since it is equipped, workability at the time of construction to the branch pipe can be improved. Furthermore, by connecting the branch pipe hard exterior material to the second exterior material, the drainage sound radiated from the branch pipe portion is less likely to leak to the outside, and an even higher soundproofing performance can be obtained.

  According to the third invention, since the first soundproof material and the second soundproof material are separably connected to each other, workability at the time of construction can be improved, and workability at the time of inspection and maintenance of the drain pipe is also achieved. Can be improved.

  According to the fourth invention, since the first hard exterior material is configured by combining the first and second divided bodies divided in the radial direction, workability during construction and workability during inspection and maintenance are improved. Can be improved.

  According to the fifth invention, the second hard exterior material is provided with an open portion for inserting the piping member in the radial direction, and the open portion is covered with the wall surface in the room. Leakage of drainage sound can be suppressed while improving.

  According to the sixth aspect of the invention, since the gap closing member for closing the gap with the ceiling surface is provided in the first sound insulating material so as to be movable in the vertical direction, the upper end and the ceiling surface of the first sound insulating member are depending on the construction location. When the size of the gap is different, it is possible to reliably close the gap and obtain a high soundproofing performance, and to improve the appearance.

It is a figure which shows the room | chamber interior of the toilet in which the soundproofing apparatus concerning embodiment was installed. It is a perspective view of a soundproofing device. It is an exploded view of a soundproofing device. It is a figure which shows the room of the toilet before a soundproofing apparatus is installed. It is a perspective view of a lower side soundproof material. It is a bottom view of a lower soundproof material. It is sectional drawing in the VII-VII line of FIG. It is a perspective view of a 1st half body. It is an end view of a 1st half body. It is sectional drawing in the XX line of FIG. It is a perspective view of the soundproof material for branch pipes. It is a perspective view of an obstruction board. It is an end view of the cylindrical part of the upper soundproof material concerning a modification. It is a figure which shows the measuring point of drainage sound.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows a toilet equipped with a drain pipe soundproofing device 1 according to an embodiment of the present invention. This drain pipe soundproofing device 1 includes a plurality of members as shown in FIG. 2 and FIG. 3. For example, when performing a renovation work in a room where a flush toilet in an apartment house is installed, the existing drainage pipe is soundproofed. It is comprised so that a process can be performed.

  As shown in FIG. 4, the drain pipe 100 includes a first straight pipe (pipe member) 101 that extends substantially vertically from an upper floor (for example, the second floor) to a lower floor (for example, the first floor), and a first straight pipe 101. A second straight pipe (pipe member) 102 connected to the lower end of the second straight pipe 102 and extending downward substantially vertically, and a branch pipe (pipe member) 103 connected to the lower end of the second straight pipe 102.

  A flange 101 a is formed at the lower end of the first straight pipe 101. A flange 102 a that contacts the flange 101 a of the first straight pipe 101 is formed at the upper end of the second straight pipe 102. An inspection port 102 b is provided in the middle portion of the second straight pipe 102 in the vertical direction. The flange 101a of the first straight pipe 101 and the flange 102a of the second straight pipe 102 are fastened by bolts and nuts. The flange 101a of the first straight pipe 101 and the flange 102a of the second straight pipe 102 are connection portions.

  A flange 102 c is formed at the lower end of the second straight pipe 102. A flange 103 a that contacts the flange 102 c of the second straight pipe 102 is formed at the upper end of the branch pipe 103. The flange 102c of the second straight pipe 102 and the flange 103a of the branch pipe 103 are fastened by bolts and nuts. The flange 102c of the second straight pipe 102 and the flange 103a of the branch pipe 103 are connection portions.

  The branch pipe portion 103b of the branch pipe 103 extends substantially horizontally toward a drain outlet provided in the lower part of the flush toilet. The tip of the branch pipe part 103b and the drain outlet of the flush toilet are connected.

  In an apartment house of an older age, the existing drainage pipe 100 is exposed in the toilet room in this way, so it is easy to hear the drainage sound from the upper floor, and the residents feel uncomfortable. The first straight pipe 101, the second straight pipe 102, and the branch pipe 103 constituting the drain pipe 100 are cast iron pipes made of cast iron. Since this cast iron pipe cannot be replaced with another material due to legal regulations, there is a restriction that the cast iron pipe must be soundproofed using the soundproofing device 1.

  As shown in FIGS. 1 to 3, the soundproofing device 1 mainly includes a lower soundproofing material (second soundproofing material) 10 that covers the second straight pipe 102 and the branch pipe 103, and an upper soundproofing that covers the first straight pipe 101. A material (first soundproof material) 11 and a branch pipe soundproof material 12 covering the branch pipe portion 103b of the branch pipe 103 are provided.

  First, the structure of the lower soundproof material 10 will be described. The lower soundproofing material 10 includes a main body portion 18 formed in a rectangular tube shape that is long in the vertical direction as a whole, and a lid member 21 attached to the upper portion of the main body portion 18.

  As shown in FIG.5 and FIG.6, the upper end surface and lower end surface of the main-body part 18 are each open | released over the whole. Further, the back surface of the main body portion 18 is open over both ends in the vertical direction, and the horizontal cross section of the main body portion 18 is substantially U-shaped.

  As shown in FIG. 1, the lower end of the main body 18 is placed on the indoor floor. The upper end of the main body portion 18 is located slightly above the flange 101a of the first straight pipe 101, and the side surface of the flange 101a can be completely covered by the main body portion 18. The height of the main body 18 may be a height that can completely cover at least the flange 101a of the first straight pipe 101, and may be changed according to the construction site. In this embodiment, the height of the main body 18 is about 800 mm.

  By setting the height of the main body 18 as described above, the flange 101a of the first straight pipe 101, the flanges 102a and 102c of the second straight pipe 102, and the flange 103a of the branch pipe 103 are covered by the main body 18. become.

  As shown in FIG. 6, the main body 18 includes a hard exterior material (second hard exterior material) 19 and an interior material (second interior material) 27.

  The hard exterior material 19 is harder to deform than the interior material 27 and is formed by molding a hard hard resin material. When the hard exterior material 19 is placed on the floor surface, it is self-supporting and maintains its shape at the time of molding. It has a degree of hardness.

  Examples of the resin material constituting the hard exterior material 19 include polyethylene, polypropylene, polyvinyl chloride, polycarbonate, acrylonitrile / butadiene / styrene resin, polymethyl methacrylate, polyethylene terephthalate, and polystyrene. It is not limited. Moreover, the hard exterior material 19 can also be comprised with various metal plates.

  As shown also in FIG. 5, the hard exterior material 19 has the front board part 23 and a pair of side board parts 24 and 24, and these front board parts 23 and the side board parts 24 and 24 use the same material. Are integrally molded. The front plate part 23 is configured by a flat plate extending in the vertical direction. A substantially rectangular cutout portion 23 a for allowing the branch pipe portion 103 b of the branch pipe 103 to pass therethrough is formed in the lower portion of the front plate portion 23. As will be described in detail later, the branch pipe soundproof material 12 is connected to the peripheral edge of the notch 23a as shown in FIG.

  The side plate portions 24, 24 are connected to both side edge portions of the front plate portion 23, and extend in the vertical direction substantially parallel to each other. Curved plate portions 24a and 24a that are curved and extend in directions approaching each other are formed at the respective rear edge portions of the side plate portions 24 and 24. A portion between the curved plate portions 24a and 24a is opened.

  In addition, it is also possible to give the pattern by uneven | corrugated shape to the outer surface of the front-plate part 23 of the main-body part 18, or the side-plate parts 24 and 24. FIG.

  On the back side of the side plate portions 24, 24, inner plate portions 24 b, 24 b that protrude inward of the main body portion 18 and extend in the vertical direction substantially parallel to the front plate portion 23 are formed. As shown in FIG. 6, protrusions 24c and 24c are formed at the tips of the inner plate portions 24b and 24b.

  As shown in FIG. 5, a plurality of fixing members 25, 25,. The fixing member 25 is for preventing the movement in the opening direction and the movement in the closing direction of the main body 18 due to the opening of the back side of the main body 18, and is the same as the material constituting the main body 18. It is made of various materials.

  All the fixing members 25 have the same shape, and have an elongated plate shape extending in the width direction of the main body 18. As shown also in FIG. 6, insertion portions 25 a into which the distal end side of the inner plate portion 24 b of the main body portion 18 is inserted are formed at both longitudinal ends of the fixing member 25. The insertion portion 25a is formed with a projection 25b that engages with the projection 24c of the inner plate portion 24b. By inserting the inner plate portions 24b, 24b of the both side plate portions 24, 24 into both the insertion portions 25a of the fixing member 25 and engaging the projections 24c with the projections 25b, the both side plate portions 24, 24 via the fixing member 25. The back side is connected. Thereby, the movement of the main body 18 in the opening direction and the movement in the closing direction are prevented.

  The fixing member 25 is provided with a cover portion 25c formed so as to cover the curved plate portion 24a.

  The interior material 27 is attached to the inside of the main body 18. The interior material 27 is formed in a sheet shape covering the entire surface of the front plate portion 23 and the entire surfaces of the side plate portions 24 and 24. The interior material 27 has a two-layer structure including a sound absorbing material 27 a disposed so as to face the drain pipe 100 and a sound insulating material 27 b disposed on the opposite side of the sound absorbing material 27 a from the drain pipe 100.

  The sound absorbing material 27a has a property of absorbing sound, and can be composed of, for example, felt, non-woven fabric, rock wool, glass wool, foam material, etc., and among these, a plurality of types may be combined. . The material of the sound absorbing material 27a is not limited to that described above, and any material that can absorb sound may be used.

  The sound insulating material 27b is intended to block the sound that has been absorbed by the sound absorbing material 27a from being transmitted to the outside. Examples of the material constituting the sound insulating material 27b include, but are not limited to, olefinic resins such as polyethylene and polypropylene, and plastics such as vinyl chloride resin. For example, a base material component having viscoelasticity As butyl rubber, polyisobutylene, polyisoprene, polychloroprene, styrene butadiene copolymer, ethylene propylene multi-component copolymer, polybutadiene, acrylic rubber, chlorosulfonated polyethylene, silicone rubber, urethane rubber, ethylene vinyl acetate, vinyl chloride, acetic acid Examples thereof include polymers such as vinyl and compositions based on asphalts. Densification can be achieved by adding fillers such as heavy calcium carbonate, clay, talc, barium sulfate, and metal powder to such a base material component.

  As shown in FIG. 7, the size of the hard exterior material 19 is set large so that the interior material 27 does not contact the flanges 101 a, 101 b, 102 a, 102 c, and 103 a of the drain pipe 100. As a result, a gap R <b> 1 for attenuating the drainage sound emitted from the drainage pipe 100 is formed between the interior material 27 and the drainage pipe 100.

  As shown in FIG. 5, the lid member 21 of the lower soundproof material 10 includes a first lid component 21 a and a second lid component 21 b that are divided into two in the radial direction of the drainage pipe 100. The first lid constituting part 21a closes the one radial side of the upper end opening of the main body part 18, and the second lid constituting part 21b closes the other radial side of the upper end opening of the main body part 18. is there. Semicircular notches 21c and 21d are formed in the first lid component 21a and the second lid component 21b, respectively. In the state where the first and second lid constituting parts 21a and 21b are combined, a circular opening is formed by the notches 21c and 21d. The size of the opening is set so that the lower end of the hard exterior member 32 of the upper soundproof material 11 to be described later enters.

  Although not shown, an interior material having a sound absorbing material and a sound insulating material is also attached to the back surface of the lid member 21. Moreover, as shown in FIG. 7, the open side of the hard exterior material 19 is covered with an interior material.

  Next, the structure of the upper soundproof material 11 will be described. As shown in FIGS. 2 and 3, the upper soundproofing material 11 includes a cylindrical portion 30 that houses the first straight pipe 101, and a gap closing member for closing a gap between the cylindrical portion 30 and the indoor ceiling surface. 31.

  The cylindrical portion 30 extends straight along the first straight pipe 101 and has substantially the same outer diameter from the upper end to the lower end. As shown in FIG. 12, the cylindrical portion 30 includes a hard exterior material (first hard exterior material) 32 and an interior material (first interior material) 33. The hard exterior material 32 and the interior material 33 are made of the same material as the hard exterior material 19 and the interior material 27 of the lower soundproof material 10. Accordingly, the hard exterior material 32 of the upper soundproof material 11 can also stand on its own. The interior material 33 includes a sound absorbing material 33a and a sound insulating material 33b.

  As shown in FIGS. 8 and 9, the hard exterior material 32 of the upper soundproofing material 11 includes a first half-divided body (first divided body) 35 and a second half-divided body that are divided into two in the radial direction. (Second divided body) 36.

  As shown in FIG. 9, a plate portion 35 a that protrudes inward in the radial direction and extends across both ends in the longitudinal direction is formed at one end portion (upper side in FIG. 9) of the first half body 35 in the circumferential direction. . The plate portion 35a is formed with a claw portion 35b that protrudes toward the second halved body 36 side. The plate part 35 a and the claw part 35 b are integrally formed with the main body part of the first half body 35.

  An insertion portion 35c into which the same shape as the claw portion 35b can be inserted is formed at the other circumferential end of the first half 35 (lower side in FIG. 9) so as to protrude radially inward. ing. A protrusion 35d is formed inside the insertion portion 35c, and can be engaged with the same shape as the claw portion 35b. The insertion part 35 c and the protrusion 35 d are also integrally formed with the main body part of the first half 35.

  The first and second halves 35, 36 have the same shape. As shown in FIG. 10, the second half 36 is formed with a plate portion 36a, a claw portion 36b, an insertion portion 36c, and a projection 36d. Has been. Accordingly, when the first half 35 and the second half 36 are combined, the claw 35b of the first half 35 is inserted into the insertion part 36c of the second half 36, thereby projecting the claw 35b. 36d is engaged, and the claw 36b and the projection 35d are engaged by inserting the claw 36b of the second half 36 into the insertion part 35c of the first half 35. Thereby, the first and second halves 35 and 36 are integrated.

  The interior material 33 is divided into two parts corresponding to the divided structure of the hard exterior material 32, and is attached to the inner surfaces of the first and second halves 35 and 36, respectively. The interior material 33 of the first half body 35 protrudes from the other circumferential end of the first half body 35 (the lower side in FIG. 10). The interior material 33 of the second half 36 projects from the other circumferential end of the second half 36 (upper side in FIG. 10).

  By arranging the interior material 33 in this way, when the first and second halves 35 and 36 are combined, the split surfaces of the first and second halves 35 and 36 are surely secured by the interior material 33. Will be covered.

  As shown in FIG. 10, the outer diameter of the hard exterior material 32 is set so that the interior material 33 does not contact the first straight pipe 101 and smaller than the outer diameter of the flange 101a (shown in FIG. 7). Yes. Between the interior material 33 and the first straight pipe 101, a gap R2 for attenuating the drainage sound radiated from the first straight pipe 101 is formed. Further, since the hard exterior member 32 is smaller than the outer diameter of the flange 101a, the lower end of the hard exterior member 32 can be placed on the upper surface of the flange 101a.

  As shown in FIG. 2, the gap closing member 31 has a cylindrical shape surrounding the first straight pipe 101 as a whole, and is divided into two in the radial direction of the drain pipe 100, and a second constituent part 31b. And. A flange 31c in contact with the ceiling surface is formed at the upper end of the first component 31a, and a flange 31d is similarly formed at the upper end of the second component 31b. The flanges 31c and 31d are formed in an annular shape with the first and second components 31a and 31b being combined.

  The lower side of the gap closing member 31 is inserted inside the upper portion of the cylindrical portion 30. The gap closing member 31 is movable in the vertical direction along the inner surface of the cylindrical portion 30 while being inserted into the cylindrical portion 30. The gap is closed by moving the gap closing member 31 up and down according to the size of the gap between the cylindrical portion 30 and the ceiling surface and bringing the flanges 31c and 31d into contact with the ceiling surface. The gap closing member 31 may be fixed to the ceiling surface or may be fixed to the cylindrical portion 30.

  Next, the structure of the sound insulating material 12 for branch pipes will be described. As shown in FIG. 11, the soundproofing material 12 for the branch pipe is formed in a rectangular tube shape that extends along the branch pipe portion 103 b of the branch pipe 103. The sound insulation material 12 for branch pipes includes a hard exterior material (hard exterior material for branch pipes) 40 and an interior material (interior material for branch pipes) 41. The hard exterior material 40 and the interior material 41 are made of the same material as the hard exterior material 19 and the interior material 27 of the lower soundproof material 10.

  The hard exterior member 40 has a bottom plate portion 45, a back plate portion 46, and an upper plate portion 47, and the bottom plate portion 45, the back plate portion 46, and the upper plate portion 47 are integrally formed using the same material. Has been. A detachable closing plate 49 is provided on the front surface of the hard exterior member 40, and switching between a state in which the front surface is opened and a state in which the front surface is closed is performed by the attachment and detachment of the blocking plate 49.

  As shown in FIG. 2, a side wall portion 40a is provided at the right end portion of the hard exterior member 40 and is entirely closed, while the left end portion is entirely opened. The left end portion is inserted into the cutout portion 23a of the hard exterior material 19 of the lower soundproof material 10, and the hard exterior material 40 and the hard exterior material 19 of the lower soundproof material 10 are connected.

  The bottom plate portion 45 of the hard exterior material 40 is formed of a flat plate. The back plate portion 46 extends upward from an edge portion on the back surface side of the bottom plate portion 45. The upper plate portion 47 extends substantially parallel to the bottom plate portion 45 from the upper edge portion of the back plate portion 46 toward the front side.

  A curved plate portion 45 a that curves upward is formed at the front edge of the bottom plate portion 45. An inner plate portion 45 b (shown in FIG. 11) that protrudes upward and extends substantially parallel to the back plate portion 46 is formed on the back side of the curved plate portion 45 a of the bottom plate portion 45.

  As shown in FIG. 11, a curved plate portion 47 a that curves downward is formed at the front edge of the upper plate portion 47. An inner plate portion 47 b that protrudes downward and extends substantially parallel to the back plate portion 46 is formed on the back side of the upper plate portion 47 with respect to the curved plate portion 47 a.

  As shown in FIG. 12, the closing plate 49 is made of a rectangular plate extending in the longitudinal direction of the branch pipe soundproofing material 12, and is divided into a right side portion 50 and a left side portion 51. An upper groove 50a into which the inner plate portion 47b is inserted is formed at the upper portion of the right side portion 50, and a lower groove 50b into which the inner plate portion 45b is inserted is formed at the lower portion. The right side portion 50 moves in the left-right direction along the inner plate portions 45b and 47b. A semicircular cutout 50 c is formed on the left edge of the right side 50.

  Similar to the right side portion 50, the left side portion 51 is formed with an upper groove 51a into which the inner plate portion 47b is inserted and a lower groove 51b into which the inner plate portion 45b is inserted. The left side 51 also moves in the left-right direction along the inner plate portions 45b and 47b. A semicircular cutout 51c corresponding to the cutout 50c is formed on the right edge of the left side 51.

  A circular opening is formed by the notches 50c and 51c, and a discharge pipe extending from the toilet is inserted into the opening.

  Further, as shown in FIG. 11, the interior material 41 is attached to the entire inner surface of the hard exterior material 40.

  Next, the case where the soundproofing device 1 configured as described above is installed will be described. As shown in FIG. 4, a drain pipe 100 is exposed in the toilet room before installation.

  First, the lower soundproof material 10 is attached. When attaching the lower soundproof material 10, the fixing member 25 (shown in FIG. 5) is removed from the hard exterior material 19. A fixing bracket (not shown) for fixing the lower soundproof material 10 is attached to the wall surface of the room.

  Then, the drain pipe 100 is inserted into the inside of the hard exterior member 19 in the radial direction from the open side of the back surface of the hard exterior member 19 of the main body 18. The fixing member 25 is attached after the drainage pipe 100 is completely inserted into the hard exterior member 19. Thereafter, the orientation of the main body portion 18 is changed so that the open portion of the hard exterior material 19 is covered with the wall surface of the room, and is fixed to the fixture.

  Next, the upper end opening of the main body 18 is closed with the lid member 21. Since the lid member 21 is divided into two parts, a first lid component 21a and a second lid component 21b, the lid member 21 is attached so as to sandwich the drain pipe 100. The main body portion of the first straight pipe 101 of the drain pipe 100 passes through the notches 21 c and 21 d of the lid member 21.

  After the lower soundproof material 10 is attached, the upper soundproof material 11 is attached. First, the gap closing member 31 is attached. At this time, since the first component 31a and the second component 31b are divided into two parts, it is possible to easily attach the drain pipe 100 with the drain pipe 100 interposed therebetween.

  Thereafter, the cylindrical portion 32 of the upper soundproof material 11 is attached. At this time, the first half 35 and the second half 36 of the hard exterior member 32 are divided. Then, the first half 35 and the second half 36 are combined so that the drainage pipe 100 is sandwiched between the first half 35 and the second half 36. That is, as shown in FIG. 10, the claw portion 35b of the first half body 35 is inserted into the insertion portion 36c of the second half body 36, and the claw portion 36b of the second half body 36 is inserted into the first half body. Insert into the insertion part 35 c of the body 35. Thereby, the first and second halves 35 and 36 are integrated.

  The cylindrical portion 30 formed by integrating the first and second halves 35 and 36 is inserted into the opening of the lid member 21 of the lower soundproof material 10 as shown in FIG. The lower end portion of the cylindrical portion 30 is placed on the upper surface of the flange 101a. As a result, the upper soundproof material 11 is positioned.

  Thereafter, the gap closing member 31 is moved until the flanges 31c and 31d of the gap closing member 31 are in contact with the ceiling surface. Then, the gap closing member 31 is fixed to the ceiling surface or the cylindrical portion 30. Since the gap closing member 31 can be moved in the vertical direction in this way, even if the size of the gap between the upper end portion of the cylindrical portion 30 and the ceiling surface varies depending on the installation location, the length of the cylindrical portion 30 can be reduced. It can be handled by moving the gap closing member 31 without changing, and the cost can be reduced.

  Next, the sound insulating material 12 for the branch pipe is attached. The right side portion 50 of the closing plate 49 is attached to the hard exterior material 40 of the branch pipe soundproof material 12. And while inserting the branch pipe part 103b of the branch pipe 103 from the open side (left side) of the hard exterior material 40, the discharge pipe of a toilet is inserted. Thereafter, the left side 51 of the closing plate 49 is attached. When the left side portion 51 is attached, the left side portion 51 can be easily moved because it may be moved along the inner plate portions 45b and 47b. By combining the right side portion 50 and the left side portion 51 of the closing plate 49, the peripheral portions of the cutout portions 50c and 51c are in close contact with the outer peripheral surface of the discharge pipe of the toilet, so that there is almost no gap.

  Then, the left end portion of the hard exterior material 40 of the branch pipe soundproof material 12 is inserted into the cutout portion 23a of the hard exterior material 19 of the lower soundproof material 10, and the both hard exterior materials 19 and 40 are joined.

  Thus, when installing the soundproofing device 1, since the interior materials 27, 33, 41 are attached in advance to the hard exterior materials 19, 32, 40, the hard exterior materials 19, 32, 40 are installed. The drain pipe 100 is covered with the interior materials 27, 33 and 41. As described above, since the winding work using the adhesive material is not required at the time of construction, the interior materials 27, 33, and 41 are attached even when the gap between the drain pipe 100 and the wall surface is narrow. It becomes possible to arrange easily so that the drain pipe 100 may be covered.

  In the state in which the soundproofing device 1 is installed, a gap R1 is formed between the interior material 27 of the lower soundproofing material 10 and the drain pipe 100 as shown in FIG. 7, and the upper soundproofing as shown in FIG. A gap R <b> 2 is also formed between the interior material 33 of the material 11 and the drain pipe 100. Since the hard exterior material 19 of the lower soundproof material 10 has a larger diameter than the hard exterior material 32 of the upper soundproof material 11, the gap R1 is larger than the gap R2.

  In addition, since the lower soundproof material 10 that accommodates the flange 101a and the upper soundproof material 11 that accommodates the portion without the flange 101a are separated, only the lower soundproof material 10 is enlarged, and the upper soundproof material 11 is small. it can. This reduces the feeling of pressure in the room.

  Next, the operation of the soundproofing device 1 will be described. For example, when a toilet is used on the upper floor, drainage flows through the drain pipe 100 toward the lower floor. At this time, drainage sound is radiated from the outer surface of the drainage pipe 100. The drainage sound radiated from the outer surface of the first straight pipe 101 is absorbed by the sound absorbing material 33a of the interior material 33 of the upper soundproofing material 11, and is prevented from leaking outside by the sound insulating material 33b. Is also prevented from leaking outside. Further, since the gap portion R2 is provided between the first straight pipe 101 of the drain pipe 100 and the sound absorbing material 33a, the presence of the gap portion R2 can provide a draining sound attenuation effect.

  Further, the drainage sound radiated from the outer surface of the second straight pipe 102 is absorbed by the sound absorbing material 27a of the interior material 27 of the lower soundproofing material 10, and is prevented from leaking outside by the sound insulating material 27b. Leakage to the outside is also suppressed by the material 19.

  Inside the lower soundproof material 10, there are flanges 101a, 101b, etc., and there are connecting portions. For example, since there is a step or the like on the inner surface of the connecting portion between the first straight pipe 101 and the second straight pipe 102, the flow of drainage is likely to be disturbed at the connecting portion, and the emission degree of the drainage sound is larger than other portions. . Since the gap portion R1 of the portion having a large radiation degree is increased, the drainage sound attenuation effect is enhanced, and the drainage sound leaking to the outside is reduced.

  As described above, according to the soundproofing device 1 according to this embodiment, at the time of construction, the winding work using the adhesive material as in the case of the conventional soundproofing material becomes unnecessary, so that the workability can be improved. Then, after the drainage sound radiated from the drainage pipe 100 is absorbed by the sound absorbing materials 27a, 33a, 41a, the sound is cut off by the sound insulating materials 27b, 33b, 41b to make it difficult to leak to the outside. Also by being accommodated in the materials 19, 32, 40, the drainage sound is difficult to leak to the outside. Thereby, a high soundproofing effect is obtained.

  Further, the exterior material 19 of the lower soundproof material 10 is formed to be large so as to accommodate the flange 101a, and a large gap portion R1 is formed between the interior material 27 and the drain pipe 100. Since the drainage sound attenuation effect is enhanced by the formation of the void R1, it is possible to effectively take a soundproofing measure for the connecting portion, which tends to increase the degree of radiation of the drainage sound. Since the shape for accommodating the flange 101a is used in forming the gap portion R1, unnecessary enlargement of the lower soundproof material 10 is avoided. Thereby, the feeling of pressure in a room becomes small.

  Further, the upper soundproofing material 11 can make the outer diameter smaller than that of the lower soundproofing material 10 because the flange 101a is not covered, and the pressure feeling in the room can be reduced.

  Moreover, since the interior material 41 is attached to the hard exterior material 40 of the branch pipe soundproof material 12, the interior material 41 can be easily arranged even when the gap between the branch pipe portion 103b and the wall surface is narrow during construction. Is possible.

  Further, since the hard exterior material 40 of the branch pipe soundproofing material 12 is connected to the hard exterior material 19 of the lower soundproofing material 10, the drainage sound is less likely to leak to the outside, and an even higher soundproofing performance can be obtained.

  Moreover, the lower side soundproof material 10, the upper side soundproof material 11, and the soundproof material 12 for branch pipes can be separately conveyed and installed in the room at the time of construction. Thereby, workability | operativity with respect to the drain pipe 100 in a narrow room improves. Further, when the lower soundproof material 10 and the upper soundproof material 11 are removed for inspection and maintenance of the drain pipe 100, it is possible to remove them separately, so that workability is improved.

  Further, at the time of construction, the cylindrical portion 30 of the upper soundproof material 11 is divided into a first half 35 and a second half 36, and these half 35 and 36 are arranged so as to sandwich the drain pipe 100. After that, the upper soundproofing material 11 can be configured by bonding to each other. Therefore, workability for the drainage pipe 100 in a particularly narrow room is improved. When the upper soundproofing material 11 is removed for inspection or maintenance of the drain pipe 100, the first and second halves 35, 36 can be easily detached.

  Further, at the time of construction, the drainage pipe 100 can be inserted into the lower soundproofing material 10 from the radial direction through the open part on the back side of the hard exterior material 19. And since the open part of the hard exterior material 19 is covered with the wall surface of a room | chamber interior after construction, the leak of drainage sound is suppressed.

  In addition, when the size of the gap between the upper end of the upper soundproof material 11 and the ceiling surface differs depending on the construction site, the gap closing member 31 is moved in the vertical direction to reliably close the gaps of various sizes. can do. Thereby, high soundproof performance can be obtained at low cost, and appearance can be improved.

  In addition, although the case where this invention was applied to the drain pipe for toilets was demonstrated in the said embodiment, it is not restricted to this, For example, it can apply also to the drain pipe of a bathroom, the drain pipe of a bathroom, and the drain pipe of a kitchen. .

  Further, the shape of the lower soundproofing material 10 and the soundproofing material 12 for branch pipes may be other than a rectangular tube shape. Further, the shape of the upper soundproofing material 11 may be a shape other than a cylinder, for example, a polygonal cylindrical shape.

  Further, as in the modification shown in FIG. 13, a recess 35 e is formed at one end (upper side in FIG. 13) of the first half 35 constituting the cylindrical portion 30 of the upper soundproof material 11, and the other end A convex portion 35f may be formed on the portion (lower side in FIG. 13), a concave portion 36e may be formed on one end portion in the circumferential direction of the second halved body 36, and a convex portion 36f may be formed on the other end portion. . By inserting the convex portion 36f of the second half body 36 into the concave portion 35e of the first half body 35 and inserting the convex portion 35f of the first half body 35 into the concave portion 36e of the second half body 36. The halves 35 and 36 are integrated.

  Examples will be described below.

  The drainage sound was measured in a house as shown in FIG. This house has a drain that extends from the second floor toilet to the first floor toilet. The height from the floor surface of the first floor to the ceiling surface was 2955 mm. The thickness of the second floor was 300 mm.

  A microphone and a sound level meter were used as the measuring device. The microphone was NA-29 manufactured by Lion Co., Ltd., and was fixed to a stand installed on the floor of the first floor. The microphone was installed at a height of 1200 mm from the floor. The microphone was separated from the outer surface of the upper soundproofing material 11 of the soundproofing device 1 by 1000 mm. The sound level meter is NH-17 manufactured by Rion Corporation. The measurement frequency band is 31.5 Hz to 8 kHz. The dynamic characteristic is an A characteristic in FAST (MAX). In addition, the measurement time was 6 seconds per time, and the amount of water discharged from the toilet on the second floor was 18 liters per time.

  First, Comparative Example 1 will be described. Comparative Example 1 is a case where no soundproofing treatment is applied to the drain pipe. In this case, as shown in Table 1, the measured value was 40 dB. In the sense of hearing, the drainage sound was noticeable.

  Next, Comparative Example 2 will be described. In Comparative Example 2, only the upper soundproof material 11 was attached. The hard exterior material 32 of the upper soundproof material 11 is made of 2.3 mm thick hard PVC (polyvinyl chloride), and the sound absorbing material 33a of the interior material 33 is a 5 mm thick felt made by Sanki Kogyo Co., Ltd. The material 33b is a 1 mm-thick PVC sheet manufactured by Sanyo Kogyo Co., Ltd. In this case, the measured value was 36 dB. The drainage sound could be identified by hearing.

  Next, Example 1 will be described. In the first embodiment, the hard exterior material 32 of the upper soundproof material 11 is manufactured by 2.3 mm thick PVC, the sound absorbing material 33 a of the interior material 33 is manufactured by 5 mm thick felt, and the sound insulating material 33 b is 1 mm thick PVC. Made with sheets. The hard exterior materials 19 and 40 of the lower soundproof material 10 and the branch pipe soundproof material 12 are the same as the upper soundproof material 11, and the interior materials 27 and 40 are the same as the upper soundproof material 11. In this case, the measured value was 28 dB. I could hardly feel the drainage sound.

  Next, Example 2 will be described. In Example 2, the hard exterior material 32 of the upper soundproofing material 11 is manufactured by the same 2.3 mm thick PVC as in Example 1, and the sound absorbing material 33a of the interior material 33 is a 10 mm thick non-woven fabric manufactured by Nanwa Silk Co., Ltd. The sound insulating material 33b was made of a 2 mm thick butyl rubber sheet of MTS-05 manufactured by Hayakawa Rubber Co., Ltd. The hard exterior materials 19 and 40 of the lower soundproof material 10 and the branch pipe soundproof material 12 are the same as the upper soundproof material 11, and the interior materials 27 and 40 are the same as the upper soundproof material 11. In this case, the measured value was 29 dB. I could hardly feel the drainage sound.

  Next, Example 3 will be described. In Example 3, the hard exterior material 32 of the upper soundproofing material 11 is made of 2 mm thick PC (polycarbonate), the sound absorbing material 33a of the interior material 33 is made of 10 mm thick felt, and the sound insulating material 33b is the same as in Example 1. Made of the same material. The hard exterior materials 19 and 40 of the lower soundproof material 10 and the branch pipe soundproof material 12 are the same as the upper soundproof material 11, and the interior materials 27 and 40 are the same as the upper soundproof material 11. In this case, the measured value was 28 dB. I could hardly feel the drainage sound.

  As described above, the soundproofing device for a drain pipe according to the present invention can be applied to a drain pipe of a toilet, for example.

1 Soundproofing device 10 Lower soundproofing material (second soundproofing material)
11 Upper soundproof material (first soundproof material)
12 Soundproofing material for branch pipes 19 Hard exterior material (second hard exterior material)
27 Interior material (2nd interior material)
27a Sound absorbing material 27b Sound insulating material 31 Gap closing member 32 Hard exterior material (first hard exterior material)
33 Interior material (first interior material)
33a Sound absorbing material 33b Sound insulating material 40 Hard exterior material 41 Interior material 41a Sound absorbing material 41b Sound insulating material 100 Drain pipe 101 First straight pipe (pipe member)
101a Flange (connection part)
102 Second straight pipe (piping member)
102a Flange (connection part)
103 branch pipe

Claims (6)

In a soundproofing device for drainage pipes for applying a soundproofing treatment to an existing drainage pipe to which a plurality of piping members are connected,
A first soundproofing material covering a portion other than the connecting portion of the piping member;
A second soundproofing material covering at least the connection part of the piping member,
The first soundproofing material covers a piping member and a first interior material having a sound absorbing material arranged to face the piping member and a sound insulating material arranged on the opposite side of the piping member of the sound absorbing material. A first hard exterior material that is molded in advance and to which the first interior material is attached on the piping member side;
The second sound insulating material covers the piping member and the second interior material having the sound absorbing material arranged to face the piping member and the sound insulating material arranged on the opposite side of the piping member of the sound absorbing material. A second hard exterior material that is molded in advance and to which the second interior material is attached on the piping member side;
The second hard exterior material is formed larger than the first hard exterior material so as to accommodate the connection portion of the piping member and form a gap between the piping member and the second interior material. A soundproofing device for drainage pipes characterized by that. The soundproofing device for a drain pipe according to claim 1,
Provided with a soundproof material for branch pipes covering the branch pipe part of the piping member,
The sound insulation member for the branch pipe includes a sound absorbing material arranged so as to face the branch pipe, an interior material for the branch pipe having a sound insulating material arranged on the side opposite to the branch pipe of the sound absorbing material, and a branch pipe so as to cover the branch pipe in advance. A branch pipe hard exterior material that is molded and attached to the branch pipe interior material on the branch pipe side;
The drain pipe soundproofing device, wherein the branch pipe hard sheathing material is connected to a second hard sheathing material. The soundproof device for a drain pipe according to claim 1 or 2,
A soundproofing device for a drain pipe, wherein the first soundproofing material and the second soundproofing material are detachably connected to each other. In the sound insulation device for drain pipes according to any one of claims 1 to 3,
The first hard exterior material is constituted by joining the first and second divided bodies divided in the radial direction of the piping member. The soundproofing device for a drain pipe according to any one of claims 1 to 4,
The second hard exterior member is provided with an open portion for inserting the piping member in the radial direction thereof, and the open portion is disposed so as to be covered with the wall surface of the room. In the sound insulation device for drain pipes according to any one of claims 1 to 5,
The first soundproof material and the second soundproof material are formed so as to cover the piping member extending in the vertical direction,
The first soundproofing material is disposed on the upper side of the second soundproofing material,
The drainage pipe soundproofing, wherein the first soundproofing material is provided with a gap closing member for closing the gap between the upper end of the first soundproofing material and the indoor ceiling surface so as to be movable in the vertical direction. apparatus.

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