JP2010236330A - Sound insulating cover for collecting pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulating cover for a collecting pipe which can obtain the expected quality regardless of the change of a shape of the upper side of a part of the peripheral wall of the collecting pipe located below a floor slab. <P>SOLUTION: The sound insulating cover 30 for the collecting pipe is flexible and disposed to the collecting pipe fixed to the floor slab in a state where the vertically middle portion of the collecting pipe is embedded in the floor slab so as to cover a part of the peripheral wall of the collecting pipe located below the floor slab. A cutting position designating mark 34 for forming a notch which allows a notch for covering the reduced diameter part or enlarged diameter part of the collecting pipe 1 in an upward narrowing position or an upward expanding position to appear by cutting operation is provided on the outer side part 30b for the upper part disposed on the upper side in a state mounted to the collecting pipe 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a collecting pipe (for example, a collecting pipe used in a drainage merging section of an apartment house) fixed to the floor slab in a state where the upper and lower intermediate parts are embedded in the floor slab, and the pipe peripheral wall portion thereof. The present invention relates to a flexible sound insulation cover for a collecting pipe disposed in a state of covering a portion located below a floor slab.

  In general, measures are taken to cover a peripheral wall portion of a fluid pipe such as a drain pipe with a sound insulation cover having a sound insulation property in order to suppress noise such as passing sound of the passing fluid. In particular, a collecting pipe having a branch pipe connection port part on the pipe peripheral wall part needs to be covered with a sound insulation cover without a gap because noise increases due to the merging of fluids.

  However, the portion located above the floor slab in the pipe peripheral wall portion of the collecting pipe is provided with one or a plurality of branch pipe connection ports, so that it is an ordinary simple rectangular wide area sound insulation cover. In this case, the branch pipe connection port is obstructive, so it is wrapped around the pipe wall multiple times while avoiding the branch pipe connection port (direct winding or winding with a sound absorbing material such as glass wool). A long and narrow tape shape that can be used) is used.

  On the other hand, the normal sound insulation cover mentioned above is used for the part located under the floor slab in the pipe peripheral wall part of the collecting pipe.

  However, the upper side of the portion located below the floor slab in the pipe peripheral wall portion of the collecting pipe may cause a reduced diameter part or an enlarged diameter part depending on the specifications of the collecting pipe. When the reduced diameter portion exists, the cover area becomes excessive at the reduced diameter portion, resulting in “swing”, and when the enlarged diameter portion exists, the cover area becomes too small at the enlarged diameter portion. Since the coating becomes insufficient, there is a serious problem that the expected quality (sound insulation performance) cannot be obtained depending on the specification of the collecting pipe.

  The present invention has been made in view of the above-mentioned circumstances, and the main problem is that regardless of the shape change on the upper side of the portion located below the floor slab of the pipe peripheral wall portion of the collecting pipe, The object is to provide a sound insulation cover for a collecting pipe that can obtain quality.

The first characteristic configuration of the present invention relates to a sound insulation cover for a collecting pipe,
Flexibility to be arranged in a state in which the pipe located on the bottom of the pipe slab is covered with the collecting pipe fixed to the floor slab with the upper and lower intermediate parts embedded in the floor slab The sound insulation cover for the collecting pipe of
The upper outer side portion disposed on the upper side in the arrangement state with respect to the collecting pipe is used to cover the reduced diameter portion or the enlarged diameter portion of the collecting pipe in an upwardly constricted posture or an upwardly expanded posture by a cutting operation. This is in that a cut position indication mark for forming a cutout is provided to reveal the cutout.

  According to the above configuration, the cutting operation is performed not only when the reduced diameter portion or the enlarged diameter portion exists above the floor slab of the pipe peripheral wall portion of the collecting pipe, but also when the reduced diameter portion or the enlarged diameter portion exists. The above-mentioned notch can be exposed to the upper outer side portion by means of the above, so that the reduced diameter portion and the expanded diameter portion are covered with the upper narrowed posture and the upwardly expanded posture with the upper portion where the notch is exposed. can do.

  Accordingly, it is possible to eliminate the problem that “shrinkage” occurs in the diameter-reduced portion of the collecting pipe and the problem that the covering is insufficient in the diameter-expanded portion of the collecting pipe, and the floor slab of the pipe peripheral wall portion of the collecting pipe can be eliminated. The desired sound insulation performance can be obtained regardless of the shape on the upper side.

  The second characteristic configuration of the present invention is that an adhesive surface portion for fixing to the collecting pipe is provided on the back surface on the side of the upper outer side portion.

  According to the above configuration, since the covering operation is performed in a form of lifting from below, the upper outer piece portion side can be first fixed by the adhesive force of the bonding surface portion. It is possible to perform the covering work in a situation where there is less change in posture due to gravity (change in posture such as the upper side hangs down) as compared with the case where the part is fixed, and the workability can be improved effectively.

  In particular, in the use state in which the above-described notch is exposed on the outer side portion for the upper side, in the operation of covering the reduced diameter portion or the enlarged diameter portion of the pipe peripheral wall portion in a form using the notch, Since the portion close to the notch can be first fixed by the adhesive surface, the accuracy and workability of the covering operation of the reduced diameter portion and the expanded diameter portion of the pipe peripheral wall portion can be greatly improved.

  A third characteristic configuration of the present invention is that the adhesive surface portion is provided on the back surface of the outer side portion for upward.

  According to the above configuration, in the use state in which the notch is made to appear on the upper outer side portion, the reduced diameter portion or the enlarged diameter portion of the pipe peripheral wall portion in the form using the notch. At the same time as the covering operation, the covering portion can be first fixed by the adhesive surface portion, so that the accuracy and workability of the covering operation of the reduced diameter portion and the expanded diameter portion of the pipe peripheral wall portion can be further improved.

According to a fourth characteristic configuration of the present invention, the adhesive surface portion is provided with a detachable release paper, and the cutting position instruction mark is formed by a notch penetrating in the front and back direction.
The adhesive surface portion is provided in a region closer to the center than the tip of the notch that appears by the cutting operation.

  According to the above configuration, since the cutting position instruction mark is configured by a notch penetrating the entire cover including the release paper in the front and back direction, the adhesive surface portion before peeling the release paper is not exposed. The cutting operation for making the notch appear can be performed, and the workability of the cutting operation can be improved.

  Moreover, since the adhesive surface portion is provided in a region closer to the center than the tip of the notch that appears by the cutting operation, the release paper can be continued in the region on the center, thereby In addition, it becomes possible to perform the release operation of the release paper at a stroke under the condition where the notch appears, and it is possible to ensure high workability of the release operation of the release paper.

  A fifth characteristic configuration of the present invention is that the adhesive surface portion is also provided on the back surface of the lateral outer side portion that is continuous with the upper outer piece portion.

  According to the above configuration, at the time of covering the pipe peripheral wall portion of the collecting pipe, it is provided on one back surface of the lateral outer side portion simultaneously with the completion of the winding operation from the state in which the upper outer side portion is fixed. Since it can be held in the winding posture after the winding operation in the form of being fixed to the surface on the other outer side by the adhesive force of the bonded surface portion, for example, a separate fixing means while holding in the winding posture The workability of the fixing operation can be improved as compared with the case where the fixing operation is performed with.

Illustration of drainage junction (A) Front side perspective view of upper cover, (b) Enlarged surface view of main part of upper cover Explanatory drawing showing how to arrange the top cover Explanatory drawing showing how to arrange the top cover (A) Cross-sectional view of the main part showing the arrangement state of the upper cover (cross-sectional view taken along line VV in FIG. 1), (b) Cross-sectional view of the main part showing the arrangement state of the upper cover (FIG. 1) VV line explanatory cross-sectional view), (c) a cross-sectional view of the main part showing the arrangement state of the upper cover (VV line explanatory cross-sectional view of FIG. 1), (d) the arrangement state of the upper cover Side view of essential parts shown Back side perspective view of bottom cover Explanatory drawing which shows the arrangement method of a lower cover Explanatory drawing which shows the arrangement method of a lower cover Explanatory drawing which shows the arrangement method of a lower cover Explanatory drawing which shows the arrangement method of a lower cover Explanatory drawing which shows the arrangement method of a lower cover Explanatory drawing which shows the arrangement method of a lower cover (A) Partially cutaway surface view of the branch pipe connection part cover, (b) Vertical sectional view of the branch pipe connection part cover Explanatory drawing which shows the arrangement | positioning method of the cover for branch pipe connection parts Enlarged surface view of the top cover showing other embodiments

  FIG. 1 shows a drainage merging section in a building, and a main inflow pipe is provided at one end side (upper end side in this example) of the collecting pipe 1 extending through the floor slab S in the direction of the main axis X1. 2 is plugged in (an example of connection), and the main outlet pipe 3 is plugged into the main pipe connection port 1B on the other end side (the lower end side in this example) of the collecting pipe 1 in the direction of the main axis X1. ing.

  Further, for example, each of the branch pipes 4 for draining individual dwelling units and the like is inserted into three (one or more examples) branch pipe connection ports 1E formed to project from the pipe peripheral wall part 1D of the collecting pipe 1. It is connected.

  The main inflow pipe 2, the main outflow pipe 3, and the branch pipe 4 are covered with a flexible piping sound insulation cover 5 that suppresses leakage of internal fluid passing sound, and the collecting pipe 1 It is covered with a flexible collecting pipe sound insulation cover 6 that suppresses leakage of fluid passing sound and the like.

  As the sound insulation cover 6 for the collecting pipe, an upper cover 20 that covers a portion of the collecting pipe 1 that is located above the floor slab S and a connecting portion between the collecting pipe 1 and the main inflow pipe 2, and the floor slab S in the collecting pipe 1 A lower cover 30 (an example of a sound insulation cover for a collecting pipe according to the present invention) covering a lower portion and a connecting part between the collecting pipe 1 and the main outflow pipe 3; and a connecting part between the collecting pipe 1 and the branch pipe 4 Three types of the branch pipe connection covers 40 that cover each of them are used.

  As shown in FIGS. 2 to 4, the upper cover 20 includes an inner sound-absorbing layer 20 </ b> A made of glass wool felt (an example of a sound insulating material, an example of a sound-absorbing material), and an inorganic rubber asphalt (a sound insulating material). A sheet-like material in which a sound insulating layer 20B made of an example, an example of a heat-resistant material) and a protective layer 20D for preventing deterioration and improving workability made of a synthetic resin nonwoven fabric are laminated in that order in a horizontally long rectangular shape. It is configured.

  The surface of the sound absorbing layer 20A (that is, the inner surface of the upper cover 20) is provided with a double-sided tape 21 (an example of an adhesive surface part, an example of a fixing means) for fixing to the collecting pipe 1. Release paper (not shown) that can be attached and detached is provided on the entire adhesive surface of the double-sided tape 21.

  The horizontal dimension (width dimension) W2 of the upper cover 20 is configured with a dimension corresponding to the outer peripheral length of the pipe peripheral wall portion 1D of the collecting pipe 1. Further, the vertical dimension (height dimension) H2 of the upper cover 20 is a dimension that can reach the outer peripheral surface of the main inflow pipe 2 beyond the connecting portion between the collection pipe 1 and the main inflow pipe 2 when arranged in the collection pipe 1. It is configured.

  Then, a cutting means such as scissors or a cutter is used for the intermediate portion in the lower direction of the upper cover 20 (an example of a portion disposed opposite to the branch pipe connection port 1E in a state of being disposed in the collecting pipe 1). Three (one or more) that can reveal the insertion port 22 (an example of an insertion part) in which the branch pipe connection port part 1E can be arranged in a substantially insertion state (an example of an insertion state or a substantially insertion state). The cutting position finger 23 for forming the insertion portion in (example) is provided in a state of being aligned along the horizontal direction.

  In the cutting position instruction mark 23, a plurality of perforated cut lines made of cuts penetrating in the front and back directions, specifically, branch pipe connection ports 1E for small-diameter branch pipes are substantially inserted by cutting operation. An annular (specifically, a heptagonal outer edge line) first cut line 24 capable of revealing the insertion port 22 (see FIG. 5A) having an outer dimension that can be arranged, and a diameter larger than that. An annular second cut line 25 is formed through which an insertion port 22 (see FIG. 5B) having an outer dimension that can be arranged in a substantially inserted state of the branch pipe connection port portion 1E for the branch pipe.

  Further, the cutting position indicating mark 23 has an insertion port of the largest external dimension corresponding to the large branch pipe connection port portion 1E of the type corresponding to the pipe diameter of the branch pipe 4 in a form in which the dedicated adapter 7 is interposed. An annular third cut line 26 capable of appearing 22 (see FIG. 5C) is formed.

  That is, the first to third cut lines 24 to 26 constitute plural kinds of annular or substantially annular cutting position indicating lines having different outer dimensions.

  As shown in FIG. 2 (b), the first cut line 24 has the same point (base point) 20p of the lower side portion 20a (an example of the outer side portion) of the upper cover 20 so as to form a V shape in front view. A pair of lower line portions 24a arranged in a continuous manner, a pair of lateral line portions 24b extending upward from the upper end of the lower line portion 24a, and a trapezoidal line shape in front view connecting the upper ends of the lateral line portions 24b The upper side line portion 24c.

  The second cut line 25 extends upward from the upper end of the pair of lower line portions 25a and a pair of lower line portions 25a arranged in a state of being connected at the base point 20p of the upper cover 20 so as to form a V shape in a front view. The first cut line 24 is configured to be surrounded by a pair of lateral line portions 25b and a trapezoidal linear upper line portion 25c connecting the upper ends of the lateral line portions 25b.

  The third cut line 26 extends upward from the upper end of the pair of lower line portions 26a and a pair of lower line portions 26a arranged in a state of being connected at the base point 20p of the upper cover 20 so as to form a V shape in a front view. The second cut line 25 is surrounded by a pair of horizontal line portions 26b and a trapezoidal line-shaped upper line portion 26c connecting the upper ends of the horizontal line portions 26b. The lateral line portion 26c of the third cutoff line 26 is also used as the lateral line portion 26c of another adjacent third cutoff line 26.

  Further, between the first cut line 24 and the second cut line 25 and between the second cut line 25 and the third cut line 26, what is the cutting operation of the cut line on the side having a smaller outer dimension? Cutting for tongue piece formation to reveal the tongue piece 27a (see FIG. 5 (d)) protruding toward the insertion portion 22 in a state where the inner peripheral edge of the insertion portion 22 is formed by another different cutting operation. A position support mark 27 is provided.

  The cutting position support mark 27 is composed of a plurality of perforated cut lines (an example of a cutting position indicating line) made of cuts penetrating in the front and back directions.

  The double-sided tape 21 is adjacent to the laterally adjacent portion of the cutting position indicating mark 23 for forming the insertion portion, specifically, the lateral side line portions 25b and 26b of the second and third cut lines 25 and 26, and the lower side. Location including a part of the side line portions 25a and 26a (an example of a location including a region on the side of the lower side portion 20a from the center point C of each insertion port 22 (see FIGS. 5A to 5C)) Is provided.

  On the other hand, the upper side portion 20b of the upper cover 20 is contracted to the collecting pipe extending to a portion opposed to the outer corner of the upper edge of the connecting portion of the collecting pipe 1 and the main inflow pipe 2 when the upper cover 20 is disposed. Seven (one or more examples) notches 28 for covering the diameter portion (in some cases, the diameter-increased portion) are provided in a state of being distributed at equal intervals along the lateral direction.

  The notch 28 is in a state in which the opposed end surfaces are in close contact with the upper quadrangular portion 28a that can be covered with the small-diameter pipe portion of the covering object in close contact with the opposing end surfaces. It is formed in a substantially wedge shape composed of a triangular portion 28b having a downward sharpening that can be covered. The dimensions of the rectangular part 28a and the triangular part 28b are set according to the dimension of the object to be covered (that is, the main pipe connecting part).

  That is, the notch 28 has an excessive cover area as the diameter dimension decreases from the outer peripheral surface of the collecting pipe 1 to the outer peripheral surface of the main inflow pipe 2 as shown in FIGS. The excessive area is reduced.

  As shown in FIGS. 6 to 12, the lower cover 30 includes an inner sound absorbing layer 30 </ b> A made of glass wool felt ((an example of a sound insulating material, an example of a sound absorbing material), and an inorganic mixed rubber asphalt (a sound insulating material). A sheet-like material in which a sound insulation layer 30B made of a heat resistant material) and a protective layer 30D for preventing deterioration and improving workability made of a synthetic resin nonwoven fabric are laminated in that order into a horizontally long rectangular shape. Configured.

  Further, double-sided tapes 31a and 31b (an example of an adhesive surface part and an example of a fixing means) for fixing to the collecting pipe 1 are provided on the surface of the sound absorbing layer 30A (that is, the back surface (inner surface) of the lower cover 30). ing.

  The horizontal dimension (width dimension) W3 of the lower cover 30 is configured to have a dimension corresponding to the outer peripheral length of the pipe peripheral wall portion 1D of the collecting pipe 1. Further, the vertical dimension (height dimension) H3 of the lower cover 30 is set so as to extend from the lower surface of the floor slab S beyond the connecting portion between the collecting pipe 1 and the main outflow pipe 3 when arranged in the collecting pipe 1. It is comprised by the dimension which can reach | attain to the outer peripheral surface.

  The lower side 30a of the lower cover 30 is provided with notches 32 having the same configuration as the notches 28 of the above-described upper cover 20 in a state of being distributed at equal intervals along the horizontal direction.

  On the other hand, on the upper side portion 30b of the lower cover 30 (an example of the outer side portion for the upper side), the reduced diameter portion or the enlarged diameter portion of the collecting pipe 1 is covered in an upwardly constricted posture or an upwardly expanded posture by a cutting operation. 7 (one or a plurality of examples) of cutting position indication marks 34 for displaying the notches 33 for forming the notches 33 are formed in a state of being distributed at equal intervals along the horizontal direction.

  The cutting position instruction mark 34 is constituted by a perforated cut line formed by a cut that penetrates the lower cover 30 in the front and back direction. Among the cut lines, a pair of horizontal side line parts 34a extending in parallel in the vertical direction from the upper side part 30b of the lower cover 30 are configured by perforations having a span of about 7 mm. The substantially V-shaped lower side line part 34b connected to the side line part 34a is formed by a pair of cuts penetrating in the entire range except for the central part in the lateral direction.

  The double-sided tape 31a is a horizontally long belt-like region including the upper side portion 30b of the lower cover 30, specifically, from the edge of the upper side portion 30b to the tip of the notch 33 (specifically, a cutting position indicating mark). 34 is provided in a region extending to the center side from the tip of 34. The double-sided tape 31b is also provided in a vertically long belt-like region including one of the left and right sides 30d of the lower cover 30 (one positioned radially outward in the winding position). Each of the adhesive surfaces of the double-sided tapes 31a and 31b is provided with a release paper (not shown) that can be attached and detached so as to cover the entire surface.

  As shown in FIGS. 13 and 14, the branch pipe connecting portion cover 40 includes a sound absorbing layer 40 </ b> A (a sound insulating base) on the inner layer side made of glass wool felt (an example of a sound insulating material, an example of a material having a sound absorbing property). An example of a material) and a thin annular protective layer 40D (an example of a bag body, an example of a restraining means) made of a synthetic resin bag-like nonwoven fabric (specifically, a bag-like shape having openings at both lateral end faces 40a). From a horizontally long rectangular mat-like material in which a posture holding frame 41 made of sheet metal (an example of posture holding means for holding the posture after the posture changing operation or a posture close thereto by plastic deformation by the posture changing operation) is inserted. It is configured.

  The branch pipe connecting portion cover 40 is configured by inserting the sound absorbing layer 40A and the posture maintaining frame body 41 into the bag-like protective layer 40D with the sound absorbing layer 40A being slightly compressed.

  The lateral dimension (width dimension) W4 of the branch pipe connection part cover 40 is configured to have a dimension corresponding to the outer peripheral length of the branch pipe connection port part 1E of the collecting pipe 1. The vertical dimension (depth dimension) H4 of the branch pipe connecting portion cover 40 is such that the outer circumference of the branch pipe 4 extends from the pipe peripheral wall portion 1D of the collecting pipe 1 to the branch pipe connecting port portion 1E and the branch pipe 4 connecting portion. It is configured with dimensions that can reach the surface.

  The shape retaining frame 41 includes a pair of first belt-like plate portions 42 having a length corresponding to the horizontal dimension of the sound absorbing layer 40A and a pair of second belt-like plates having a length corresponding to the vertical dimension of the sound absorbing layer 40A. The third portion 43 is assembled in a state having the same or substantially the same outer dimension as that of the sound absorbing layer 40 </ b> A, and a third configuration having the same configuration as that of the second belt-shaped plate portion 42 at the lateral intermediate portion between the first belt-shaped plate portions 42. The belt plate 44 is assembled in a state where the belt-like plate portion 44 is extended. Note that co-caulking is adopted for the assembling process of each strip-shaped plate portion 43.

  Next, the construction method of the sound insulation structure of the drainage junction will be described. The construction method includes the following steps (a) to (c). In this example, a case will be described in which the collection pipe sound insulation cover 6 is disposed on the collection pipe 1 in a state where the main inflow pipe 2 and the branch pipe 4 that have been covered with the pipe insulation cover 5 are connected.

(A) Arrangement process of the upper cover 20 Of the first to third cut lines 24 to 26 in the cutting position instruction mark 23 for forming the insertion portion of the upper cover 20, according to the type of the branch pipe connection opening 1E. By cutting the selected cut line (for example, the first cut line 24), the insertion opening 22 for the branch pipe connecting portion is formed in the upper cover 20.

  Next, the both wrapping pieces of the insertion port 22 are opened with respect to the branch pipe connection port portion 1E of the collecting pipe 1 while opening the both wrapping pieces 29 forming the lower side of the inner edge portion of the insertion port 22 of the upper cover 20. The upper cover 20 is moved close to the pipe peripheral wall 1D side of the collecting pipe 1 in a state in which the branch pipe connecting port 1E of the collecting pipe 1 enters the insertion opening 22 from between 29 (an example of the entry part) ( (See FIG. 3).

  Thereafter, the both wraparound pieces 29 are moved to a position located below the branch pipe connection port portion 1E, and in this state, the upper cover 20 is pressed by the portion where the double-sided tape 21 is disposed. While fixing around the branch pipe connection port 1E, both ends in the lateral direction of the upper cover 20 of the branch pipe connection port 1E (ie, covering the outer periphery of the pipe peripheral wall 1D of the collecting pipe 1 with the upper cover 20 (that is, The left side portion and the right side portion are abutted, and in that state, the upper portion of the upper cover 20 is enclosed and restrained using restraint means 8 (an example of a fixing means) such as an insulation lock (see FIG. 4).

  At this time, if the restraining means 8 is moved upward while the restraining means 8 encloses and restrains the upper and lower intermediate portions of the upper cover 20, the reduced diameter portion can be efficiently fixed.

  And while adhering the adhesive tape 9 in the state which straddles the both ends of the upper cover 20 with respect to the joint part (not shown) of the horizontal direction both ends of the upper cover 20, with respect to the upper side part 20b of the upper cover 20 Then, the adhesive tape 9 is stuck in a state straddling the upper side portion 20b of the upper cover 20 and the outer peripheral surface of the main inflow pipe 2, thereby completing the step of arranging the upper cover 20 (see FIG. 1).

(B) Branch pipe connection portion cover placement step After the upper cover 20 placement step is completed, the branch pipe connection portion cover 40 is curved and deformed to some extent (see FIG. 14). Then, the branch pipe connection is made in such a manner that the outer peripheral surface of the branch pipe connection port portion 1E, the connection portion between the branch pipe connection port portion 1E and the branch pipe 4, and the outer peripheral surface of the branch pipe 4 are applied to those portions. The portion cover 40 is further bent and deformed, and the branch pipe connection portion cover 40 is temporarily fixed to the branch pipe connection port portion 1E in a bent deformation state by the posture holding force of the posture holding frame body 41.

  Next, the branch pipe connection part cover 40 is fixed to the branch pipe connection port 1E by enclosing and restraining the branch pipe connection part cover 40 with restraint means 8 (an example of a fixing means) such as an insulok. Then, the disposing step of the branch pipe connecting portion cover 40 is completed (see FIG. 1).

  The branch pipe connecting portion cover 40 is fixed to the branch pipe connecting port 1E in such a direction that the posture holding frame body 41 of the sound absorbing layer 40A and the posture holding frame body 41 is located on the radially outer side. preferable.

(C) Arrangement process of lower cover When the diameter-reduced portion reduced by one step is present on the upper side of the portion located below the floor slab S of the collecting pipe 1, first, the notch formation of the lower cover 30 is formed. A notch 33 is formed in the upper side portion 30b of the lower cover 30 so as to correspond to the step by cutting the cut line of the portion 34 (see FIG. 7).

  Next, the release paper is removed from the double-sided tape 31a provided on the back surface of the upper part of the lower cover 30, and the upper part of the lower cover 30 is connected to the collecting pipe in an arrangement in which the upper side part 30b of the lower cover 30 contacts the lower surface of the floor slab S. The upper part of the lower cover 30 is temporarily fixed to the collecting tube 1 with the adhesive force of the double-sided tape 31a by pressing in a state of being in close contact with the reduced diameter part 1 (temporarily fixed in a posture to cover the reduced diameter part). (See FIG. 8).

  Thereafter, the release paper is removed from the double-sided tape 31b provided on the back surface of the other end of the lower cover 30, and the lower cover 30 covers the outer periphery of the pipe peripheral wall 1D located below the floor slab S of the collecting pipe 1. The other end portion of the lower cover 30 is superposed on the upper surface (outer surface) of the left and right end portions of the lower cover 30, and in this state, the other end portion of the lower cover 30 is pressed, The lower cover 30 is fixed to the collecting pipe 1 by the adhesive force of the double-sided tape 31b provided on the back surface (see FIG. 9).

  The restraining means 8 (an example of a fixing means) such as an insulation lock surrounds and restrains each of the upper and lower portions of the lower cover 30 and lowers the lower side 30 a of the lower cover 30. Adhesive tape 9 is stuck in a state straddling the side portion 30a and the outer peripheral surface of the main outflow pipe 3, thereby completing the disposing step of the lower cover 30 (see FIG. 1).

  In addition, about the arrangement | positioning method when the diameter reduction part and diameter expansion part do not exist above the part located under the floor slab S of the collecting pipe 1, the cutting operation of the notch formation part 34 of the lower cover 30 is carried out. Except for the point that it is not performed, it is the same as the case where the reduced diameter portion exists (that is, it is completed through the procedures of FIGS. Moreover, the arrangement method when the diameter-expanded portion is present above the portion located below the floor slab S of the collecting pipe 1 (see FIG. 12) is the same as the case where the aforementioned reduced-diameter portion is present. Therefore, the description is omitted.

[Other Embodiments]
(1) In the above-described embodiment, the case where each of the cutting position indication marks 23 and 27 is configured by a line (cutting position indication line) extending along the cutting position has been described as an example. You may be comprised from the point etc. which were attached | subjected only to the broken point.

(2) In the above-described embodiment, the case where each of the cutting position indicating lines 24 to 27 is configured by a notch penetrating in the front and back direction is illustrated as an example, but the cutting position indicating lines 24 to 27 are configured by a groove that does not reach the opposite surface in the front and back direction. Or may be composed of ink or the like applied to the front or back surface.

(3) The cutting operation is not limited to the operation of cutting with a dedicated cutting means (such as scissors or a cutter), but is an operation of tearing by pushing in the state where it is applied to the branch pipe insertion port 1E of the collecting pipe 1 There may be.

(4) In the above-described embodiment, the tongue piece 27c appears between the cutting position instruction lines 24 to 26 for forming the insertion portion by another cutting operation different from the cutting operation of the cutting position instruction line. The cutting position indicating mark 27 for the tongue piece is provided as an example, but the cutting position indicating line on the side having the smaller outer dimension is cut between the plurality of cutting position indicating lines 24-26. An incision (for example, an incision having a length for connecting the cutting position indicating lines adjacent in the radial direction) may be formed so that the tongue piece appears by operation.

(5) In the above-described embodiment, the cutting position instruction mark 23 for forming the insertion portion of the upper cover 20 is illustrated as an example of the case where the cutting position instruction mark 23 is configured by the first to third cut lines 24 to 26. Depending on the circumstances such as the case where the diameter of the collecting pipe 1 to be arranged is large, the fourth cut line 10 may be provided between the second cut line 25 and the third cut line 26 as shown in FIG. May be. In the figure, 10a represents the lower line portion of the fourth cut line, 10b represents the horizontal line portion of the fourth cut line 10, and 10c represents the upper line portion of the fourth cut line 10.

(6) In the above-described embodiment, the case where the adhesive surface portion is configured by the double-sided tapes 21, 31a, and 31b has been described as an example. However, the adhesive surface portion may be configured by an adhesive or the like.

(7) In the above-described embodiment, a part of the insertion portion 22 that appears on the upper cover 20 is allowed to allow the branch pipe connection port 1E and the branch pipe 4 to enter from the outer side. Although the insertion part 22 (an example of an insertion part that can be arranged in a substantially inserted state) connected to the outer side part is shown as an example, a hole-like insertion part 22 that is not partially connected to the outer side part (in the inserted state) It may be an example of an insertable insertion portion.

(8) The structure of the sound insulating sheet 6 for collecting pipes is not limited to the multilayer structure including the layer having the sound insulating property shown in the above-described embodiment, and may be a single layer structure made of a material having the sound insulating property.

(9) In the above-described embodiment, the case where the posture holding means of the branch pipe connecting portion cover 40 is configured by the posture holding frame body 41 including the belt-like plate portions 42 to 44 is described as an example. It may be composed of a belt-like posture holding member consisting only of the belt-shaped plate portion 42 or the belt-shaped plate portion 43, or may be composed of a wire net or a metal plate close to the outer shape of the cover.

(10) The branch pipe connection portion cover 40 is not limited to the collecting pipe 1 shown in the above-described embodiment, but can be applied to a sound insulation structure of various fluid pipes such as individual drain pipes, hot water pipes, gas pipes and the like.

S floor slab 1 collecting pipe 1D pipe peripheral wall 30 lower cover (sound insulation cover for collecting pipe)
30b Upper piece (upper outer side)
33 Notch 34 Cutting position instruction marks 31a and 31b for forming notches Adhesive surface portion 30d Lateral side portion (lateral outer side portion)

Claims (5)

Flexibility to be arranged in a state in which the pipe located on the bottom of the pipe slab is covered with the collecting pipe fixed to the floor slab with the upper and lower intermediate parts embedded in the floor slab The sound insulation cover for the collecting pipe of
The upper outer side portion disposed on the upper side in the arrangement state with respect to the collecting pipe is used to cover the reduced diameter portion or the enlarged diameter portion of the collecting pipe in an upwardly constricted posture or an upwardly expanded posture by a cutting operation. A sound insulation cover for a collecting pipe provided with a cutting position indicating mark for forming a notch that reveals the notch.   The sound insulation cover for a collecting pipe according to claim 1, wherein an adhesive surface part for fixing to the collecting pipe is provided on a back surface on the outer side part for the upper side.   The sound insulation cover for a collecting pipe according to claim 2, wherein the adhesive surface portion is provided on the back surface of the upper outer side portion. The adhesive surface portion is provided with a release paper that can be attached and detached, and is composed of a cut through which the cutting position instruction mark penetrates in the front and back direction,
The sound insulation cover for collecting pipes of Claim 3 with which the said adhesion surface part is provided in the area | region of the center side rather than the front-end | tip of the said notch which appears by the said cutting operation.   The sound insulation cover for collecting pipes of any one of Claims 2-4 with which the said adhesion surface part is provided also in the back surface of the outer side part for the side connected to the outer side piece part for the upper direction.

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