Joint structure and manufacturing method thereof, and building

Abstract

To provide a joint structure that suppresses peeling of an adhesive tape connecting seams of a sound insulating member due to a temperature change during storage.SOLUTION: A joint structure 1 comprises: a resin joint 10; and a sound insulating member 20 that covers an outer surface of the joint 10. The sound insulating member 20 has an inner layer as a sound absorbing layer, and an outer layer as a sound insulating layer. An adhesive tape 45 connecting seams of the sound insulating member 20 has a base material made of a resin foam, and an adhesive layer provided on one main surface of the base material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a joint structure. [Background technology]

[0002] As buildings have become more versatile and complex, there has been an increasing demand for improved sound insulation performance in piping systems, including drainage pipes. For example, in order to improve the sound insulation performance of a drainage pipe, it is effective to provide sufficient sound insulation to the curved parts of the drainage pipe, such as the legs of the vertical pipe, which generate a large amount of noise.

[0003] However, joints with curved pipe sections, such as leg joints, have multiple shapes, including curved surfaces, interrelated on their outer surfaces, making them more complex than straight pipes. For this reason, manufacturing joints with sound-insulating covers poses many challenges in terms of production and design, and it is not easy to improve the sound-insulating performance of the joints.

[0004] Therefore, for example, a technology has been disclosed in which the outer periphery of a thermally expandable fire-resistant material layer in a resin pipe joint is covered with a sound-insulating, vibration-proof sheet (see, for example, Patent Document 1). This sound-insulating, vibration-proof sheet has a multi-layer structure with an inorganic fiber layer as an inner layer and modified asphalt as an outer layer. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-142003 Summary of the Invention [Problem to be solved by the invention]

[0006] Soundproof covers with soft sound-absorbing materials (fiber, foam) as the inner layer are difficult to wrap around the shape of the leg joints. Therefore, adhesive tape is used to connect the seams of the soundproof cover. However, temperature changes during storage can change the tensile load of the adhesive tape, causing it to peel off. If the adhesive tape peels off, the soundproof cover may fall off.

[0007] The present invention has been made in consideration of such problems, and aims to provide a joint structure that prevents the adhesive tape connecting the seams of a sound-insulating material from peeling off due to temperature changes during storage. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention proposes the following means. [1] A joint structure comprising a resin joint and a sound-insulating member covering the outer surface of the joint, wherein the sound-insulating member has an inner layer that is a sound-absorbing layer and an outer layer that is a sound-insulating layer, and the adhesive tape connecting the seams of the sound-insulating member has a base material made of a resin foam and an adhesive layer provided on one main surface of the base material. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a joint structure that prevents peeling of the adhesive tape connecting the joints of a sound-insulating material due to temperature changes during storage. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view of a building in which a joint structure according to one embodiment of the present invention is used. [Figure 2] FIG. 2 is a perspective view of a sound-absorbing cover of the joint structure. [Figure 3] FIG. 2 is a plan view of the sound-absorbing sheet with the sound-absorbing cover unfolded. [Figure 4] FIG. 4 is a perspective view of a first sound-insulating cover of the joint structure. [Figure 5] FIG. 2 is a plan view of the first sound-insulating sheet with the first sound-insulating cover unfolded. [Figure 6] FIG. 10 is a plan view of the second sound-insulating sheet with the second sound-insulating cover of the joint structure unfolded. [Figure 7] FIG. 10 is a side view illustrating the procedure for constructing the joint structure. [Figure 8] FIG. 10 is a side view illustrating the procedure for constructing the joint structure. [Figure 9] FIG. 10 is a side view illustrating the procedure for constructing the joint structure. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, one embodiment of a joint structure according to the present invention will be described with reference to FIGS. As shown in Fig. 1, the joint structure 1 of this embodiment is used in, for example, a collective joint system 110 in a building 100. In Fig. 1, a collective sound-insulating member 119 and an adhesive tape 120, which will be described later, are shown transparently and hatched. A side piece 35A and an adhesive tape 45, which will be described later, are shown by two-dot chain lines. The collective joint system 110 is used for drainage of the building 100. The collective joint system 110 is arranged on each floor of the building 100 through a slab penetration hole 101a formed in a floor slab 101 of the building 100. The joint assembly system 110 includes a joint assembly 111, a vertical pipe 112, a horizontal pipe 113, and a joint structure 1.

[0012] The collective joint 111 comprises a joint body 116 and a horizontal pipe connection part 117 fixed to the joint body 116. The joint body 116 is formed in a cylindrical shape and is arranged so that the axis of the joint body 116 is aligned along the vertical direction. Here, "the axis is aligned with the vertical direction" means that the acute angle formed between the axis and the vertical direction is 30 degrees or less, or the axis and the vertical direction are parallel. This acute angle is preferably 20 degrees or less. When the axis and the vertical direction do not intersect, the axis, etc. is extended by a tangent to determine the acute angle they form. The same applies to the arrangement relationship between the outer edges and the cover elements in the axis (direction).

[0013] The upper end of the joint body 116 is a vertical pipe connecting portion 116a, and the lower end of the joint body 116 is a vertical pipe connecting portion 116b. A plurality of horizontal pipe connecting portions 117 are fixed to the outer peripheral surface of the upper part of the joint body 116. The plurality of horizontal pipe connecting portions 117 are arranged around the axis of the joint body 116 at intervals from each other. The outer surface of the joint body 116 is covered by a collective sound-insulating member 119. The collective sound-insulating member 119 includes a first collective sound-absorbing cover that covers the outer surface of the joint body 116, and a second collective sound-insulating cover (reference numerals are omitted) that covers the outer surface of the first collective sound-absorbing cover. The materials of the first collective sound-absorbing cover and the second collective sound-insulating cover are the same as the materials of the sound-absorbing cover 21 and the first sound-insulating cover 31, which will be described later. The collective sound-insulating member 119 is attached to the joint body 116 with adhesive tape 120 .

[0014] The portion of the joint body 116 below the multiple horizontal pipe connection portions 117 is disposed within the slab penetration hole 101a of the floor slab 101. In other words, the multiple horizontal pipe connection portions 117 are disposed on the floor slab 101. The lower end portion (vertical pipe connection portion 116b) of the joint body 116 is disposed below the floor slab 101. Mortar 122 is filled between the opening periphery of the slab through-hole 101 a in the floor slab 101 and the collective sound-insulating member 119 .

[0015] The vertical pipe 112 is disposed so that the axis of the vertical pipe 112 is aligned in the vertical direction. The lower end of the vertical pipe 112 is connected to a vertical pipe connecting portion 116a of the joint body 116. An end of the horizontal pipe 113 is connected to a horizontal pipe connection portion 117 of the joint assembly 111. The horizontal pipe 113 is arranged so as to gradually incline upward as it moves away from the joint assembly 111, thereby providing a water gradient.

[0016] The joint structure 1 includes a joint 10 and a sound-insulating member 20. The joint 10 includes a first socket (first connection portion) 11, a second socket (second connection portion) 12, a curved pipe portion 13, and a leg body 14. The second socket 12 has a second central axis O2 that intersects with the first central axis O1 of the first socket 11. Here, a plane that includes the first central axis O1 and the second central axis O2 is defined as a reference plane S1. The curved pipe portion 13 is formed in a curved tubular shape and is connected to the first socket 11 and the second socket 12. On the reference plane S1, the central angle of the curved pipe portion 13 relative to the central axis (the angle at which the curved pipe portion 13 is curved) is approximately 90 degrees. In this example, leg body 14 is formed in a cylindrical shape. Leg body 14 is arranged so that the axis of leg body 14 is aligned with first central axis O1 of first socket 11. A first end of leg body 14 is fixed to the outer peripheral surface of curved pipe portion 13 on the convex side where curved pipe portion 13 is curved so as to be convex. The joint 10 is disposed so that the first central axis O1 of the first socket 11 is aligned in the vertical direction. The first socket 11 and the vertical pipe connection portion 116b of the joint assembly 111 are connected by a connecting pipe 124. To the second socket 12, an end portion of a horizontal pipe 113 is connected.

[0017] The sound-insulating member 20 includes a sound-absorbing cover 21, a first sound-insulating cover (sound-insulating cover) 31, and a second sound-insulating cover 56. The configurations of the sound-absorbing cover 21, the first sound-insulating cover 31, and the second sound-insulating cover 56 will be described below with reference to the drawings, but the orientation in which the sound-absorbing cover 21, the first sound-insulating cover 31, and the second sound-insulating cover 56 are used is not limited to the orientation shown in the drawings.

[0018] The sound absorbing cover 21 covers the outer surface of the curved pipe portion 13 of the joint 10 and the like. Fig. 2 shows a perspective view of sound-absorbing cover 21, and Fig. 3 shows a plan view of sound-absorbing sheet 21A when sound-absorbing cover 21 is unfolded. Note that in Fig. 2 and subsequent figures, the parts of each cover or sheet that are connected to each other are shown with the same type of hatching. When planar (flat) sound-absorbing sheet 21A is folded and connected with adhesive tape or the like, a three-dimensional sound-absorbing cover 21 is formed. As shown in FIGS. 2 and 3, the sound absorbing cover 21 (sound absorbing sheet 21A) includes a strip 22, a first tongue piece 23, and a second tongue piece 24.

[0019] The strip 22 is formed in a rectangular shape in a plan view, and is long in a predetermined direction when unfolded. In the sound-absorbing cover 21, both outer edges 22a along the short direction of the strip-shaped piece 22 are connected to each other with adhesive tape (not shown), and the strip-shaped piece 22 is formed into a cylindrical shape. In the sound-absorbing cover 21, one outer edge 22b along the longitudinal direction of the strip-shaped piece 22 forms a first opening 21a into which the second socket 12 of the joint 10 is disposed. The first tongue 23 and the second tongue 24 are arranged on the other outer edge 22c along the longitudinal direction of the strip-shaped piece 22. When unfolded, the first tongue 23 and the second tongue 24 extend toward the opposite side of the strip-shaped piece 22. The widths of the first tongue 23 and the second tongue 24 gradually narrow toward the tip extending from the strip-shaped piece 22. When unfolded, the first tongue 23 and the second tongue 24 are formed in a triangular shape in a plan view. The first tongue 23 and the second tongue 24 are arranged side by side along the outer edge 22c of the strip-shaped piece 22.

[0020] Here, in the sound absorbing cover 21, the outer edges of the first tongue piece 23 and the second tongue piece 24 sandwiched between each other are referred to as outer edges 23a, 24a. In the sound absorbing cover 21, the portions of the outer edges 23a, 24a other than the ends on the strip-shaped piece 22 side are connected to each other with adhesive tape (not shown). In the sound-absorbing cover 21, a second opening 21b is formed by the outer edge 23a of the first tongue piece 23, the outer edge 24a of the second tongue piece 24, and the outer edge 22c of the strip-shaped piece 22, into which the leg 14 of the joint 10 is disposed. In the sound-absorbing cover 21, a third opening 21c is formed by the outer edges of the first tongue piece 23 and the second tongue piece 24 that are on the outer sides of each other, into which the end of the curved pipe portion 13 on the first socket 11 side is disposed. End faces of the outer edges 23a, 24a of the sound-absorbing cover 21 abut against side surfaces of the rib 130, which will be described later. As shown in FIG. 1, if there are multiple ribs 130, the sound-absorbing cover 21 may be provided with notches or slits through which the ribs 130 pass.

[0021] The sound-absorbing cover 21 is made of, for example, needle felt. For example, needle felt contains 40% to 50% polyethylene terephthalate, 35% to 45% acrylic fiber, and 10% to 20% wool / rayon. When manufacturing needle felt, barbed needles are inserted into the needle felt to mechanically entangle the fibers. The sound absorbing cover 21 may be made of felt such as thermal felt or PET felt, or an acrylic fiber mixture. The density of the sound absorbing cover 21 is 80 kg / m 3 The thickness of the sound absorbing cover 21 is preferably about 10 mm. The sound absorbing cover 21 is made of a softer material than the first sound insulating cover 31, and therefore the sound absorbing cover 21 can be formed in an expanded shape like the sound absorbing sheet 21A.

[0022] As shown in Figure 1, the sound-insulating member 20 preferably includes a foam tape 26 that covers the outer surface of the second socket 12 of the joint 10. The foam tape 26 is disposed on the opposite side of the sound-absorbing cover 21 from the curved pipe portion 13. The foam tape 26 preferably has a thickness similar to that of the sound-absorbing cover 21, but is harder than the sound-absorbing cover 21. The surface density of the sound-absorbing cover 21 is 1.0 kg / m 2 It is preferable that the degree of

[0023] 1, the first sound-insulating cover 31 covers the outer surfaces of the sound-absorbing cover 21 and the foam tape 26. In other words, the first sound-insulating cover 31 covers the outer surface of the joint 10 via the sound-absorbing cover 21. Fig. 4 shows a perspective view of the first sound-insulating cover 31, and Fig. 5 shows a plan view of the first sound-insulating sheet (sound-insulating sheet) 31A when the first sound-insulating cover 31 is unfolded. Note that in Fig. 4, the first adhesive tape 43 and the second adhesive tape 44 are indicated by two-dot chain lines. When the planar (flat) first sound-insulating sheet 31A is folded and connected with the adhesive tape, the three-dimensional first sound-insulating cover 31 is formed. As shown in FIGS. 4 and 5, the first sound-insulating cover 31 (first sound-insulating sheet 31A) includes a middle flat piece 32, a first flat piece 33, a second flat piece 34, and a pair of side pieces 35A, 35B.

[0024] The intermediate flat piece 32 is flat. "Flat" here means that, for example, in a cross section taken along the reference plane S1, the ratio of the length of the most convex and most concave portions of the intermediate flat piece 32 in the thickness direction to the longitudinal length of the surface on both sides of the surface in the thickness direction of the intermediate flat piece 32 in the thickness direction is within 10%. It is more preferable that this ratio is within 5%. The intermediate flat piece 32 has a rectangular shape when viewed in the thickness direction of the intermediate flat piece 32 shown in FIG. The rectangular shape here means that, for example, the ratio of the length of one of a pair of first outer edges 32a to the length of the other (described later) is within 30% and the ratio of the length of one of a pair of second outer edges 32b to the length of the other (described later) is within 30%. This ratio is more preferably within 20%.

[0025] 4 and 5, the rectangular intermediate flat piece 32 has two pairs of outer edges arranged along each other. Of the two pairs of outer edges, one pair of outer edges is referred to as a pair of first outer edges 32a, and the other pair of outer edges is referred to as a pair of second outer edges 32b. The pair of second outer edges 32b are outer edges that are different from the pair of first outer edges 32a among the four outer edges that the intermediate flat piece 32 has. In a plan view, the pair of first outer edges 32a and the pair of second outer edges 32b are arranged on opposite sides of the center of the intermediate flat piece 32. The first outer edges 32a and the second outer edges 32b are arranged adjacent to each other. As shown in FIG. 1, the intermediate flat piece 32 is disposed so that a pair of first outer edges 32a are aligned along the reference plane S1 (one of the pair of first outer edges 32a is not shown). Of the pair of second outer edges 32b, the second outer edge 32b located on the first socket 11 side is also referred to as second outer edge 32b1. Of the pair of second outer edges 32b, the second outer edge 32b located on the second socket 12 side is also referred to as second outer edge 32b2.

[0026] As shown in FIG. 4, the end of the intermediate flat piece 32 on the second outer edge 32b2 side is formed with a through hole 32c in which the leg body 14 of the joint 10 is disposed. The intermediate flat piece 32 is flat when the first sound-insulating cover 31 is formed by folding the first sound-insulating sheet 31A. 1, the intermediate flat piece 32 is in contact with the outer surface of the convex side of the curved pipe portion 13 via the sound-absorbing cover 21. The intermediate flat piece 32 is inclined so as to gradually approach the second socket 12 as it moves away from the first socket 11 along the first central axis O1.

[0027] The first flat piece 33 has a rectangular shape when viewed in the thickness direction of the first flat piece 33. The width of the first flat piece 33 (the length along the second outer edge 32b) gradually narrows as it moves away from the intermediate flat piece 32. The first flat piece 33 extends from the second outer edge 32b1 along the first central axis O1 (see FIG. 1). The second flat piece 34 has a rectangular shape when viewed in the thickness direction of the second flat piece 34. The width of the second flat piece 34 gradually narrows as it moves away from the intermediate flat piece 32. The second flat piece 34 extends from the second outer edge 32b2 along the second central axis O2 (see FIG. 1). It is preferable that the first flat piece 33 and the second flat piece 34 are each flat when the first sound-insulating cover 31 is formed by folding the first sound-insulating sheet 31A.

[0028] In this embodiment, the configuration of side piece 35A and the configuration of side piece 35B are plane-symmetrical with respect to reference plane S1. For this reason, the configuration of side piece 35A is indicated by adding the capital letter "A" to the numeral. The configuration of side piece 35B corresponding to side piece 35A is indicated by adding the capital letter "B" to the same numeral as side piece 35A. This avoids redundant explanation. For example, a main body portion 38A of side piece 35A, which will be described later, and a main body portion 38B of side piece 35B have the same configuration.

[0029] 4, the side piece 35A is provided on a first outer edge 32a1, which is one of a pair of first outer edges 32a of the intermediate flat piece 32. The side piece 35A includes a main body portion 38A, a first tongue portion 39A, and a second tongue portion 40A. The main body portion 38A is provided on the first outer edge 32a1. The main body portion 38A extends from the first outer edge 32a1 along a first direction in the circumferential direction of the curved pipe portion 13. The first tongue portion 39A extends from the outer edge of the main body portion 38A on the first receiving port 11 side (see FIG. 1). The first tongue portion 39A is connected to the first flat piece 33 by a first adhesive tape (first attaching member) 43. The outer edge of the first tongue portion 39A (side piece 35A) on the first flat piece 33 side is connected to the outer edge of the first flat piece 33 on the first tongue portion 39A side. In other words, the outer edge of the first tongue portion 39A on the first flat piece 33 side and the outer edge of the first flat piece 33 on the first tongue portion 39A side are connected to each other in a butted relationship. The second tongue portion 40A extends from the outer edge of the main body portion 38A on the second receiving port 12 side (see FIG. 1). The second tongue portion 40A is connected to the second flat piece 34 by a first adhesive tape 43 (see FIG. 4). At this time, the outer edge of the second tongue portion 40A (side piece 35A) on the second flat piece 34 side is connected to the outer edge of the second flat piece 34 on the second tongue portion 40A side. For example, the first adhesive tape 43 is attached along the first central axis O1 and the second central axis O2.

[0030] The side pieces 35A, 35B are wrapped around the entire outer surface of the curved pipe portion 13 together with the intermediate flat piece 32 and connected to each other by a second adhesive tape (second attaching member) 44. For example, the second adhesive tape 44 is attached along the second central axis O2. In the first sound-insulating cover 31, the first flat piece 33 and the side pieces 35A, 35B form a first opening 31a into which the end of the curved pipe portion 13 on the first socket 11 side is disposed. The second flat piece 34 and the side pieces 35A, 35B form a second opening 31b into which the second socket 12 of the fitting 10 (the end of the curved pipe portion 13 on the second socket 12 side) is disposed. 1, the end of the first sound-insulating cover 31 on the first socket 11 side and the first socket 11 are connected to each other by adhesive tape 45. The adhesive tape 45 is wrapped around the entire periphery of the first socket 11.

[0031] The thickness of the first sound insulating cover 31 is preferably about 1 mm to 5 mm, and more preferably about 2 mm. The surface density of the first sound insulating cover 31 is 1 kg / m 2 ~8kg / m 2 It is preferable that the 2 It is more preferable that the degree of The first sound-insulating cover 31 is formed from an elastic resin material such as an olefin-based material (a resin composition containing 300 to 300 parts by mass of inorganic filler per 100 parts by mass of olefin-based resin).

[0032] The inorganic filler is not particularly limited, but examples thereof include silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawnnite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, and dewatered sludge. Of these, calcium carbonate is preferably used as the inorganic filler in view of the balance between weight and cost. These may be used alone or in combination of two or more.

[0033] The olefin resin is not particularly limited, but examples thereof include low-density polyethylene (PE), high-density polyethylene, linear low-density polyethylene, atactic polypropylene, isotactic polypropylene, syndiotactic polypropylene, and poly-α-olefin. 3 ~0.93g / cm 3 The olefin resin is preferably polyethylene having a density of 0.87 g / cm. 3 If the density is less than 0.93 g / cm 3 , the strength of the first sound-insulating cover 31 is insufficient. 3 If the bending modulus of elasticity of the olefin resin is more than 100 kg / cm, there is a risk that the first sound insulating cover 31 will buckle when flattened. 2 ~3000kg / cm 2 If so, the strength and winding processability are sufficient. The first sound-insulating cover 31 may be formed from a material other than an olefin-based material, such as polyvinyl chloride resin, polystyrene resin, ABS resin, AS resin, or an elastomer material such as thermoplastic elastomer (TPE). The first sound-insulating cover 31 is made of a harder material than the sound-absorbing cover 21, and therefore the first sound-insulating cover 31 needs to be formed in the unfolded shape of the first sound-insulating sheet 31A.

[0034] The first sound-insulating sheet 31A is used to cover the outer surface of the joint 10. 5, in the first sound insulation sheet 31A, the first flat piece 33 extends from the second outer edge 32b1 toward the opposite side to the intermediate flat piece 32. The second flat piece 34 extends from the second outer edge 32b2 toward the opposite side to the intermediate flat piece 32. The side piece 35A is provided on the first outer edge 32a1 and extends toward the opposite side from the intermediate flat piece 32. The main body portion 38A extends from the first outer edge 32a1 toward the opposite side from the intermediate flat piece 32 along the second outer edge 32b. The first tongue portion 39A extends from the outer edge of the main body portion 38A on the first flat piece 33 side (the first socket 11 side) toward the opposite side of the main body portion 38A. The width of the first tongue portion 39A (the length along the second outer edge 32b) gradually narrows as it moves away from the main body portion 38A. The second tongue portion 40A extends from the outer edge of the main body portion 38A on the second flat piece 34 side (the second socket 12 side) toward the opposite side of the main body portion 38A. The width of the second tongue portion 40A gradually narrows as it moves away from the main body portion 38A. The tongue portions 39A and 40A have a triangular shape in plan view.

[0035] The distance between the first flat piece 33 and the first tongue portion 39A of the side piece 35A gradually increases as the flat piece 33 moves away from the intermediate flat piece 32. That is, the notch 46A formed between the first flat piece 33 and the first tongue portion 39A is formed in a V-shape that opens in a direction away from the intermediate flat piece 32. Similarly, the distance between the second flat piece 34 and the second tongue portion 40A of the side piece 35A gradually increases with increasing distance from the intermediate flat piece 32. That is, the notch 47A formed between the second flat piece 34 and the second tongue portion 40A is formed in a V-shape that opens in a direction away from the intermediate flat piece 32.

[0036] The side piece 35B is provided on the first outer edge 32a2 and extends toward the opposite side from the intermediate flat piece 32. The side piece 35B includes a main body portion 38B, a first tongue portion 39B, and a second tongue portion 40B that are configured similarly to the main body portion 38A, the first tongue portion 39A, and the second tongue portion 40A of the side piece 35A.

[0037] The second sound-insulating cover 56 is formed in a cylindrical shape. The second sound-insulating cover 56 covers the outer surface of the second connection portion 12 of the joint 10 via the sound-absorbing cover 21. The second sound-insulating cover 56 is disposed so as to be shifted in position relative to the first sound-insulating cover 31 in the direction along the second central axis O2. That is, the end of the first sound insulating cover 31 on the second connecting portion 12 side and the second sound insulating cover 56 are arranged side by side in a state of abutting against each other in the direction along the second central axis O2. 1, the first sound insulating cover 31 and the second sound insulating cover 56 are connected to each other by an adhesive tape 45. The adhesive tape 45 is wrapped around the entire periphery of the second sound insulating cover 56. The second sound-insulating cover 56 and the foam tape 26 are connected to each other by an adhesive tape 45. The adhesive tape 45 is wrapped around the entire circumference of the foam tape 26.

[0038] The second sound insulating cover 56 is unfolded to form a second sound insulating sheet 56A, which is formed in a strip shape as shown in FIG. The second sound-insulating cover 56 can be made of the same material as the first sound-insulating cover 31 .

[0039] The adhesive tape 45 has a base material made of a resin foam and an adhesive layer provided on one main surface of the base material.

[0040] The width of the adhesive tape 45 is preferably 20 mm or more and 60 mm or less, and more preferably 30 mm or more and 50 mm or less. If the width of the adhesive tape 45 is 20 mm or more, it is possible to suppress changes in the tensile load of the adhesive tape 45 due to temperature changes during storage. On the other hand, if the width of the adhesive tape 45 is 60 mm or less, it is possible to prevent the tape from shifting due to the load applied to the sound insulation cover during installation.

[0041] The thickness of the adhesive tape 45 is preferably 0.15 mm to 2.0 mm, more preferably 0.2 mm to 1.5 mm, and most preferably 0.2 mm to 0.8 mm. If the thickness of the adhesive tape 45 is 0.15 mm or more, changes in the tensile load of the adhesive tape 45 due to temperature changes during storage can be suppressed. On the other hand, if the thickness of the adhesive tape 45 is 2.0 mm or less, less force is required when winding the adhesive tape 45.

[0042] The tensile load of the adhesive tape 45 is preferably 10 N or more and 45 N or less, and more preferably 20 N or more and 40 N or less. If the tensile load of the adhesive tape 45 is 10 N or more, the adhesive tape 45 is less likely to wrinkle or break when wrapped around. On the other hand, if the tensile load of the adhesive tape 45 is 45 N or less, it is possible to prevent the tensile load of the adhesive tape 45 from changing due to temperature changes during storage.

[0043] The tensile load of the adhesive tape 45 can be measured under the condition of 23°C by a method conforming to JIS Z 0237 (2009).

[0044] The difference in tensile load of the adhesive tape 45 when the temperature changes, specifically, the absolute value of the difference between the tensile load at 0°C and the tensile load at 45°C, is preferably 60 N or less, and more preferably 40 N or less. If the difference in tensile load of the adhesive tape 45 when the temperature changes is 60 N or less, it is possible to suppress changes in the tensile load of the adhesive tape 45 due to temperature changes during storage.

[0045] The adhesive strength of the adhesive tape 45 is preferably 10 N or more, and more preferably 30 N or more. If the adhesive strength of the adhesive tape 45 is 10 N or more, it is possible to prevent the tensile load of the adhesive tape 45 from changing due to temperature changes during storage.

[0046] The adhesive strength of the adhesive tape can be measured at 23°C using a method in accordance with JIS Z 0237 (2009).

[0047] The thickness of the substrate (resin foam) is preferably 100 μm or more and 1500 μm or less, and more preferably 600 μm or more and 1000 μm or less. If the thickness of the substrate (resin foam) is 100 μm or more, it is less likely to break when wrapped around the sound insulation cover. On the other hand, if the thickness of the substrate (resin foam) is 1300 μm or less, it easily conforms to the unevenness of the sound insulation cover and is less likely to wrinkle.

[0048] The thickness of the adhesive layer is preferably 50 μm or more and 200 μm or less, and more preferably 100 μm or more and 150 μm or less. If the thickness of the adhesive layer is 50 μm or more, peeling of the adhesive tape 45 due to temperature changes during storage can be prevented. On the other hand, if the thickness of the adhesive layer is 200 μm or less, cohesive failure of the adhesive layer can be prevented.

[0049] The expansion ratio of the base material (resin foam) is preferably 2 to 10, and more preferably 4 to 9. If the expansion ratio of the base material (resin foam) is equal to or greater than the above-mentioned lower limit, it is possible to prevent the tensile load of the adhesive tape 45 from changing due to temperature changes during storage. On the other hand, if the expansion ratio of the base material (resin foam) is equal to or less than the above-mentioned upper limit, it is less likely to break when wrapped around the sound-insulating cover.

[0050] The expansion ratio of the substrate (resin foam) can be calculated, for example, by dividing the specific gravity of the resin constituting the foam in an unfoamed state by the specific gravity of the resin in the foamed state. The specific gravity can be calculated by cutting the substrate (resin foam) to a certain size and dividing the volume (measured by measuring the thickness, width, and length dimensions with vernier calipers) by the mass (measured by an electronic balance, etc.).

[0051] Examples of foam materials include polyethylene, polypropylene, urethane, and rubber.

[0052] Examples of the material for the adhesive layer include an acrylic adhesive and a rubber adhesive.

[0053] Next, a procedure for constructing the joint structure 1 configured as above will be described. The following describes the procedure for covering a single joint 10, to which the connecting pipe 124 and the horizontal pipe 113 are not connected, with the sound-insulating member 20. Note that the procedure for attaching the adhesive tapes 43, 44 and the like will not be described here. 7, foam tape 26 is wrapped around the end of second socket 12 of joint 10 opposite curved pipe portion 13 in advance. Foam tape 26 is used to provide a step in second socket 12 for sound-absorbing cover 21. Next, as shown in FIG. 8, a sound absorbing sheet 21A is wrapped around the outer surface of the joint 10, and the outer surface of the joint 10 is covered with a sound absorbing cover 21. 9, the first sound-insulating sheet 31A and the second sound-insulating sheet 56A are wrapped around the outer surfaces of the joint 10 and the sound-absorbing cover 21, respectively, to cover the outer surfaces of the joint 10 and the sound-absorbing cover 21 with the first sound-insulating cover 31 and the second sound-insulating cover 56. At this time, the second sound-insulating cover 56 is supported by the foam tape 26.

[0054] As described above, the joint structure 1 of this embodiment includes a resin joint 10 and a sound-insulating member 20 covering the outer surface of the joint 10. The sound-insulating member 20 has an inner sound-absorbing layer (sound-absorbing cover 21) and outer sound-insulating layers (first sound-insulating cover 31, second sound-insulating cover 56). The adhesive tape 45 connecting the seams of the sound-insulating member 20 has a base material made of a resin foam and an adhesive layer provided on one main surface of the base material. This prevents the adhesive tape 45 from peeling off due to temperature changes during storage. In other words, because the adhesive tape 45 has a base material made of a resin foam, the pores of the resin foam deform when the temperature changes, preventing the resin foam from expanding or contracting. This prevents the adhesive tape 45 from peeling off due to temperature changes.

[0055] Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and configuration changes, combinations, deletions, etc. are also included within the scope that does not deviate from the gist of the present invention. For example, in the above embodiment, the outer edge of the first tongue portion 39A on the first flat piece 33 side may not be connected to the outer edge of the first flat piece 33 on the first tongue portion 39A side, and for example, in a plan view, the center of the first tongue portion 39A may be connected to the center of the first flat piece 33. In this case, in the first sound insulation sheet, the distance between the first flat piece 33 and the first tongue portion 39A may not gradually increase as it moves away from the intermediate flat piece 32. The sound-insulating member 20 does not necessarily have to include the second sound-insulating cover 56 .

[0056] The joint 10 does not have to include the legs 14. In this case, the through-hole 32c is not formed in the first sound-insulating cover. Although the first and second connection portions are described as being sockets 11 and 12, the first and second connection portions are not limited to being sockets, and may be spigots, flanges, or the like. [Example]

[0057] The present invention will be explained in more detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0058] [Example 1] As shown in Fig. 1 , the first sound-insulating cover 31 and the second sound-insulating cover 56 were connected to each other with adhesive tape 45. The adhesive tape 45 was wrapped around the entire periphery of the second sound-insulating cover 56. In addition, the second sound-insulating cover 56 and the foam tape 26 were connected to each other with adhesive tape 45. The adhesive tape 45 was wrapped around the entire periphery of the foam tape 26. The adhesive tape used had a base material made of foamed polyethylene and an adhesive layer made of acrylic resin, and the thickness of the adhesive tape was 0.8 mm and the width was 25 mm.

[0059] "Measurement of tensile load on adhesive tape" The tensile load of the adhesive tape was measured according to the method in accordance with JIS Z 0237 (2009) under the condition of 23° C. The results are shown in Table 1.

[0060] "Measurement of the difference in tensile load of adhesive tape when temperature changes" The tensile load of the adhesive tape was measured at 0°C and 45°C according to a method in accordance with JIS Z 0237. From the obtained results, the absolute value of the difference between the tensile load at 0°C and the tensile load at 45°C was calculated. The results are shown in Table 1.

[0061] "Adhesive strength measurement of adhesive tape" The adhesive strength of the adhesive tape was measured according to JIS Z 0237 (2009) at 23°C. The results are shown in Table 1.

[0062] "Evaluation of heat resistance of adhesive tape" The adhesive tape wrapped as described above was subjected to a heat resistance test. The adhesive tape was exposed to an atmosphere of 0°C for 2 hours and then to an atmosphere of 45°C for 2 hours, which was repeated 50 times, and the adhesive tape was visually observed to see if it peeled off. If it did not peel off, it was evaluated as "Good", and if it did peel off, it was evaluated as "Poor". The results are shown in Table 1.

[0063] [Example 2] The adhesive tape was wound in the same manner as in Example 1, except that the width of the adhesive tape was 50 mm. The tensile load of the adhesive tape, the difference in tensile load when the temperature of the adhesive tape changed, the adhesive strength of the adhesive tape, and the heat resistance of the adhesive tape were measured in the same manner as in Example 1. The results are shown in Table 1.

[0064] [Example 3] The adhesive tape was wound in the same manner as in Example 1, except that the width of the adhesive tape was 60 mm. The tensile load of the adhesive tape, the difference in tensile load when the temperature of the adhesive tape changed, the adhesive strength of the adhesive tape, and the heat resistance of the adhesive tape were measured in the same manner as in Example 1. The results are shown in Table 1.

[0065] [Comparative Example] The adhesive tape was wound in the same manner as in Example 1, except that the following adhesive was used. The adhesive tape used had a base material made of soft polyvinyl chloride and an adhesive layer made of rubber, and was 0.4 mm thick and 25 mm wide. The tensile load of the adhesive tape, the difference in tensile load when the temperature of the adhesive tape changed, the adhesive strength of the adhesive tape, and the heat resistance of the adhesive tape were measured in the same manner as in Example 1. The results are shown in Table 1.

[0066] [Table 1]

[0067] The results in Table 1 show that in Examples 1 and 2, the difference in tensile load when the temperature of the adhesive tape changed was small, and the adhesive tape was difficult to peel off due to temperature changes. [Explanation of symbols]

[0068] 1 Joint structure 10 Joints 11 First socket (first connection part) 12 Second socket (second connection part) 13 Bent pipe section 20 Sound-insulating materials 21 Sound-absorbing cover 31 No. 1 sound insulation cover (sound insulation cover) 31A No. 1 sound insulation sheet (sound insulation sheet) 32 Intermediate flat piece 32a, 32a1, 32a2 First outer edge 32b, 32b1, 32b2 Second outer edge 33 1st flat piece 34 2nd flat piece 35A,35B side piece 38A, 38B Main body 39A,39B 1st tongue 40A, 40B Second tongue 43 First adhesive tape (first joining member) 44 Second adhesive tape (second attachment member) 45 adhesive tape 56 Second sound insulation cover 130 Ribs O1 1st central axis O2 2nd central axis S1 reference plane

Claims

1. A joint structure comprising a resin joint, a sound-insulating member covering an outer surface of the joint, and a foam tape located at an end of the joint, The sound-insulating member has an inner layer that is a sound absorbing layer and an outer layer that is a sound-insulating layer, The adhesive tape that connects the seams of the sound-insulating member has a base material made of a resin foam and an adhesive layer provided on one main surface of the base material, The foam tape and the sound-insulating layer are joined together with the adhesive tape, The joint is disposed between a collective joint or a vertical pipe disposed in a through hole of a floor slab of a building and a horizontal pipe disposed under the floor slab; The joint has a first connection portion connected to the lower end of the manifold or the vertical pipe, a second connection portion connected to the horizontal pipe, and a curved pipe portion between the first connection portion and the second connection portion, the sound-insulating layer includes a first sound-insulating cover that covers the curved pipe portion and a second sound-insulating cover that covers the second connection portion, A joint structure in which the first sound-insulating cover and the second sound-insulating cover are connected by the adhesive tape.

2. A joint structure comprising a resin joint, a sound-insulating member covering an outer surface of the joint, and a foam tape located at an end of the joint, The sound-insulating member has an inner layer that is a sound absorbing layer and an outer layer that is a sound-insulating layer, The adhesive tape that connects the seams of the sound-insulating member has a base material made of a resin foam and an adhesive layer provided on one main surface of the base material, The foam tape and the sound-insulating layer are joined together with the adhesive tape, The joint is disposed between a collective joint or a vertical pipe disposed in a through hole of a floor slab of a building and a horizontal pipe disposed under the floor slab; The joint has a first connection portion connected to the lower end of the manifold or the vertical pipe, a second connection portion connected to the horizontal pipe, and a curved pipe portion between the first connection portion and the second connection portion, the sound-insulating layer includes a first sound-insulating cover that covers the curved pipe portion and a second sound-insulating cover that covers the second connection portion, A joint structure in which the second sound-insulating cover and the foam tape are connected by the adhesive tape.

3. The joint structure according to claim 1 or 2, wherein a portion of the foam tape is disposed between the outer surface of the joint and the sound-insulating layer.

4. The joint structure according to any one of claims 1 to 3, wherein an end face of the foam tape is at the same position as an end face of the joint.

5. A building comprising the joint structure according to any one of claims 1 to 4.

6. A method for manufacturing a joint structure including a resin joint and a sound-insulating member covering an outer surface of the joint, wrapping foam tape around the end of the joint; covering the outer surface of the joint with a sound-absorbing cover; covering the outer surface of the sound absorbing cover with a sound insulating cover; a step of connecting the sound-insulating covers that cover the outer surfaces of the sound-absorbing covers with adhesive tape; A method for manufacturing a joint structure having the above structure.

7. 7. The method for manufacturing a joint structure according to claim 6, wherein the step of connecting the sound-insulating covers covering the outer surfaces of the sound-absorbing covers with adhesive tape includes the step of connecting the foam tape and the sound-insulating covers with adhesive tape.

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