JP2016069846A - Fire-spread prevention mechanism for drain pipe, and method to configure drain pipe with fire-spread prevention mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire-spread prevention mechanism for a drain pipe that prevents a flowing water sound in the drain pipe from propagating to a floor slab.SOLUTION: A fire-spread prevention mechanism for a drain pipe is fitted on a drain pipe P that includes an aggregate drain pipe P1 installed to pierce through a floor slab s and formed of a nonflammable material, and a vertical pipe P2 formed of a flammable material. The fire-spread prevention mechanism includes: an expansive material 1 fitted on an outer peripheral surface of the vertical pipe P2 at a location below a bottom end of the aggregate drain pipe P1, the expansive material expanding inward in a radial direction due to a flame heat when the vertical pipe P2 is burnt at a time of fire, for covering at least a part of a drain flow passage; and a sound insulation cover 2 formed of a fire-resisting material that absorbs sound and covering the expansive material 1 from outside in a radial direction.SELECTED DRAWING: Figure 1

Description

  The present invention is configured to be attached to a drainage pipe of a building, and has a fire spread prevention mechanism for the drain pipe and a fire spread prevention mechanism for preventing the spread of fire from the lower floor to the upper floor via the drain pipe in the event of a fire. It relates to the construction method of drainage pipes.

  As a conventional example, a patent document 1 describes a spread prevention mechanism for a drain pipe that is attached to a drain pipe of a building and prevents the spread of fire from a lower floor to an upper floor via a drain pipe in a fire. There is something. This fire spread prevention mechanism is installed through a floor slab in a multi-story building and is formed of a combustible material connected to a collective drainage pipe made of a non-combustible material such as metal and below the collective drainage pipe. And an inflating material that is provided outside the standing tube and expands radially inward in the portion of the standing tube that has been burned down by the heat of a fire in the event of a fire and covers the drainage flow path.

  Among a plurality of examples described in Patent Document 1, those applied to a drain pipe in which a receiving port portion whose diameter is expanded so that the lower end portion of the collective drain pipe can be inserted into the upper end portion of the vertical pipe is formed. Yes (paragraph 0028 of Patent Document 1 and FIG. 5). In this example, since there is no portion that can support the expansion material in the non-combustible collective drainage pipe, a cylindrical fire spread prevention member is attached to the lower surface of the floor slab using a bolt or the like. Inflatable material is supported.

  However, in the structure in which the fire spread prevention member is attached to the lower surface of the floor slab in this way, the sound of running water of the drain pipe that is generated along with the passage of drainage is transmitted to the floor slab through the fire spread prevention member, There is a problem that noise is generated. Even if a sound insulating material is disposed around the drain pipe, this problem cannot be solved because the sound transmission is not blocked as long as the drain pipe and the floor slab are connected by the fire spread prevention member.

JP 2008-208653 A (0028 paragraph, FIG. 5)

  Therefore, the present invention does not allow the drainage pipe to transmit the flowing sound of the drainage pipe to the floor slab, even if the drainage pipe is a drainage pipe in which the lower end of the collective drainage pipe can be inserted at the upper end of the standing pipe. It is an object of the present invention to provide a construction method for constructing a drain pipe with a fire spread prevention mechanism and a drain pipe with a fire spread prevention mechanism.

  The present invention includes a collective drain pipe that is installed through a floor slab in a multi-story building and is formed of a non-combustible material, and a stand pipe that is connected to the lower side of the collective drain pipe and is formed of a combustible material. In the drainage spread prevention mechanism attached to the provided drainage pipe, it is attached to the outer peripheral surface of the vertical pipe at a position below the lower end of the collective drainage pipe. It is formed of an inflating material that expands inward in the radial direction by the heat of the heat and covers at least a part of the drainage flow path, and a fire-resistant material having sound absorption properties, the upper end is attached to the collective drainage pipe, and the lower end is attached to the vertical pipe A drainage prevention mechanism for a drainage pipe, comprising: a sound insulation cover that is attached and covers the expansion material from the outside in a radial direction and suppresses the sound of running water of the drainage pipe from being transmitted to the outside of the drainage pipe. is there.

  According to this configuration, the sound insulation cover is configured to cover the expansion material from the radially outward direction. For this reason, since a fire spread prevention mechanism can be comprised only by covering an expansion | swelling material with a sound-insulation cover, construction of both does not take the effort of positioning. In addition, the sound insulation cover having sound absorbing properties can provide sound insulation without transmitting the running sound of the drain pipe to the floor slab.

  In addition, the upper end portion of the standing pipe is formed with a receiving portion whose diameter is larger than that of the intermediate portion so that the lower end portion of the collective drainage pipe can be inserted, and the sound insulation cover is attached to the drainage pipe. It is also possible to provide a plurality of slits at one end in the vertical direction.

  According to this configuration, the plurality of slits provided at one end makes it easy to follow the step at the lower end of the mouth opening when the sound insulation cover is attached to the standing pipe, and the sound insulation cover is easy to attach.

  In addition, the upper end portion of the standing pipe is formed with a receiving portion whose diameter is larger than that of the intermediate portion so that the lower end portion of the collective drainage pipe can be inserted, and the sound insulation cover is attached to the drainage pipe. In this case, a plurality of slits which are vertically arranged can be provided in the middle portion of the sound insulation cover.

  According to this configuration, the plurality of slits provided in the intermediate portion makes it easy to follow the step at the upper end of the receiving portion when the sound insulating cover is attached to the standing tube, and the sound insulating cover can be easily attached.

  Moreover, the said sound-insulation cover can also be provided with the window part which can be turned up by formation of the notch penetrated in the thickness direction.

  According to this structure, the inside covered with the sound insulation cover can be visually recognized by rolling the window portion. For this reason, for example, a construction error such as forgetting to attach the expansion material can be confirmed even after the sound insulation cover is attached. In addition, when performing a water leak test on the drain pipe, the tester can visually recognize the drain pipe through the window.

  Further, the sound insulation cover may be cylindrical.

  According to this configuration, since the sound insulation cover can be attached simply by being inserted into the collecting drain pipe or the standing pipe, the construction is easy.

  In addition, the sound insulation cover may include a spacer portion having a thickness dimension larger than that of other portions on a surface facing the drain pipe when attached to the drain pipe.

  According to this configuration, even if there is a reduced diameter portion in the collective drainage pipe, the sound insulation cover can be attached while avoiding curving the outer surface, so that the appearance of the sound insulation cover after attachment can be improved.

  The sound insulating cover may include an upper cover and a lower cover that are formed separately from each other, and a connecting member that connects the upper cover and the lower cover.

  According to this configuration, until the upper cover and the lower cover are connected by the connecting member, the collecting drain pipe and the standing pipe can be exposed by rolling each cover. For this reason, when performing the water leak test of the drain pipe, the tester can directly see the drain pipe by exposing the drain pipe.

  Further, the present invention is a collective drainage pipe that is installed through a floor slab in a multi-story building and formed of a nonflammable material, and a standpipe that is connected to the lower side of the collective drainage pipe and formed of a flammable material, In the method of constructing a drain pipe with a fire spread prevention mechanism equipped with the above, if the vertical pipe is burned out in the event of a fire on the outer peripheral surface of the vertical pipe, it expands radially inward due to the heat of the fire, and at least the drain channel A drainage pipe with a fire spread prevention mechanism, characterized in that the collective drainage pipe is attached to the standing pipe with an expansion material covering a part thereof and a sound insulation cover made of a sound-absorbing fireproof material attached. This is a construction method.

  According to this method, a sound insulation cover is attached to the collective drainage pipe in advance. For this reason, a drainage pipe with a fire spread prevention mechanism can be easily constructed by attaching a collective drainage pipe with a sound insulation cover to a standing pipe in a state where the expansion material is attached to the receiving port.

  Further, the present invention is a collective drainage pipe that is installed through a floor slab in a multi-story building and formed of a nonflammable material, and a standpipe that is connected to the lower side of the collective drainage pipe and formed of a flammable material, In the method of constructing a drain pipe with a fire spread prevention mechanism equipped with the above, if the vertical pipe is burned out in the event of a fire on the outer peripheral surface of the vertical pipe, it expands radially inward due to the heat of the fire, and at least the drain channel An expansion material covering a part is attached, an upper cover formed of a sound-resistant fire-resistant material is attached to the collective drainage pipe, and a lower cover formed of a sound-absorbing fire-resistant material is attached to the vertical pipe. A method of constructing a drain pipe with a fire spread prevention mechanism, characterized in that the collective drain pipe is attached to the standing pipe, and then the upper cover and the lower cover are connected using a connecting member.

  According to this construction method, even if the sound insulation cover is composed of an upper cover and a lower cover that are separated from each other, a drain pipe with a fire spread prevention mechanism can be easily constructed.

  In the present invention, since the fire spread prevention mechanism can be configured simply by covering the expansion material with the sound insulation cover, it does not take time to position the both, and the construction is easy. Therefore, even if the drainage pipe is a drainage pipe in which the lower end part of the collecting drainage pipe is inserted at the upper end part of the standing pipe, the running sound of the drainage pipe is not transmitted to the floor slab. A construction method for constructing a fire spread prevention mechanism and a drain pipe with a fire spread prevention mechanism can be provided.

It is the figure which carried out longitudinal cross-section display of the fire spread prevention mechanism and floor slab which show 1st Embodiment of this invention. It is the figure which carried out the longitudinal cross-section display of the fire spread prevention mechanism and floor slab which show 2nd Embodiment of this invention. An example of a sound insulation cover is shown, (a) is a top view of the surface used as an inner surface at the time of attachment, (b) is a side view, (c) is a top view which shows the state made into the cylinder shape. It is the figure which carried out the longitudinal cross-section display of the fire spread prevention mechanism and floor slab which show 3rd Embodiment of this invention. It is the figure which carried out the longitudinal cross-section display of the fire spread prevention mechanism and floor slab which show 4th Embodiment of this invention.

  Next, the present invention will be described by taking up several embodiments. In addition, the direction display in the following description shows the direction in the state which attached the expansion | swelling material 1, the sound-insulation cover 2, etc. to the drain pipe P, and especially the cross section center of the drain flow path in the drain pipe P about the inside and outside of radial direction. The radial direction with reference to is shown.

(First embodiment)
First, the first embodiment will be described. As shown in FIG. 1, the fire spread prevention mechanism of the present embodiment includes an expansion material 1, a sound insulation cover 2, and a mounting member 3, and is installed through a floor slab S in a multi-story building. The drainage pipe P1 is formed and attached to the drainage pipe P provided with the vertical pipe P2 connected to the lower side of the drainage pipe P1 and formed of a combustible material. The collective drain pipe P1 is made of cast iron. The collective drainage pipe P1 is a pipe that can collect the drainage in the room on the floor slab S above the floor slab S and drop it to the lower floor, and extends in the horizontal direction as shown in the figure. The branch pipe P3 can be connected. The collective drain pipes P1 and the standing pipes P2 are alternately arranged in the vertical direction corresponding to each floor of the building, and a series of drainage channels are formed inside. The vertical pipe P2 is generally a straight pipe extending in the vertical direction, but in some cases, the drainage flow path may be bent in a horizontal direction or an oblique direction via an elbow or the like.

  The inflatable material 1 is attached to the outer peripheral surface of the receiving port portion P21 formed at the upper end portion of the standpipe P2 and having a diameter larger than that of the intermediate portion. As shown in FIG. 1, this attachment is made at a position below the lower end P12 of the collective drain pipe P1. The standpipe (including the receiving port portion P21) P1 in the present embodiment is formed of a vinyl chloride resin. The receiving port portion P21 of the present embodiment is a separate member with respect to the main body of the standpipe P2, and is integrated by bonding, but is not limited thereto, and the main body of the standpipe P2 is expanded in diameter to receive the port portion. P21 may be formed.

  The inflatable material 1 is formed into a sheet shape in advance, and the inflatable material 1 can be attached to the standpipe P2 by sticking the sheet-like body to the outer peripheral surface of the receiving port P21. Since the expansion material 1 has flexibility and can follow the outer peripheral surface of the curved receiving portion P21, it can be easily attached. In the present embodiment, the attachment to the receiving port P21 is performed by the adhesiveness of the expansion material 1 itself, but an adhesive can be used separately.

  In addition, the form before attachment to the receptacle part P21 of the expansion material 1 is not limited to a sheet form. For example, an irregular shape such as a putty shape can be wound around the outer peripheral surface of the mouth portion P21, or a tape-shaped thing can be wound around the outer peripheral surface of the mouth portion P21 with an appropriate number of turns. In the present embodiment, nothing is provided between the inflating material 1 and the sound insulating cover 2, but for example, a band-shaped metal fitting or wire can be disposed at a position outside the diameter of the inflating material 1.

  The expansion material 1 is made of a resin that expands when it receives heat. Therefore, the expansion material 1 is burned (including the case where it completely burns down and the case where a part of the expansion material 1 remains unburned). If there is a space on the inner side of the diameter, it expands in the radial direction due to the heat of the fire and the drainage channel of the drainage pipe P is closed (even if the drainage channel may not be completely closed, at least the drainage channel Some are covered). Since this closed (or covered) portion suppresses flames or high-temperature air or smoke, the spread of the upper floor from the lower floor via the collective drain pipe P1 is suppressed. The expansion of the expansion material 1 in the radially outward direction is suppressed by contact with the inner surface of the sound insulating cover 2.

  The sound insulation cover 2 is the same type as the “sound insulation cover for collecting pipes” described in Japanese Patent Application Laid-Open No. 2010-236330 by the present applicant. The sound insulation cover 2 is formed of a fireproof material having sound absorption properties. The sound insulation cover 2 of the present embodiment is formed into a felt-like sheet shape made of glass wool to form an inner layer 201, and asphalt is applied to the outer surface when the inner layer 201 is attached to form an outer layer 202. . In addition, a sheet for protecting the surface is attached to the outer side of the outer layer 202.

  The sound insulation cover 2 covers the expansion material 1 from the outside in the radial direction, and in the range where the drain pipe P is covered, the sound of running water generated by passing water through the drain pipe P is transmitted to the outside of the drain pipe. Suppress. Specifically, the inner layer 201 made of glass wool in the sound insulation cover 2 absorbs running water sound, and the outer layer 202 made of asphalt blocks transmission of running water sound. Note that the sound insulation cover 2 can also suppress transmission of vibrations in addition to sound. In the present embodiment, the sound insulation cover 2 is disposed on the entire circumference of the drain pipe P in the circumferential direction. However, the present invention is not limited to this, and the sound insulation cover 2 is configured to be disposed in a part of the circumferential direction of the drainage pipe P if the expansion of the expansion material 1 in the radial direction in a fire is suppressed. You can also.

  The sound insulation cover 2 is disposed with respect to the drain pipe P so that the upper end 2H overlaps the collective drain pipe P1 and the lower end 2L overlaps the standing pipe P2. In the present embodiment, the upper end 2H substantially coincides with the upper surface S1 of the floor slab S, and the lower end 2L is located further below the receiving port P21 in the standpipe P2. The sound insulation cover 2 of the present embodiment is attached so as to follow the outer surface of the reduced diameter portion P11 whose diameter dimension decreases as it goes downward in the collecting drain pipe P1. For this reason, the sound insulation cover 2 is attached to the drain pipe P in a constricted shape in the middle of the vertical direction as shown in FIG. The upper part of the sound insulation cover 2 is attached to the collective drainage pipe P1 and the floor slab S by a mortar M filled in a through hole S3 penetrating the floor slab S in the vertical direction in order to pass the collective drainage pipe P1.

  The attachment member 3 is used to attach the lower part of the sound insulation cover 2 to the standpipe P2. In the present embodiment, a resin band is used as the attachment member 3, and the sound insulation cover 2 can be brought into close contact with the outer surface of the standpipe P2 by tightening the lower part of the sound insulation cover 2 from outside the diameter. Since the attachment member 3 is made of resin, it melts and disappears during a fire, but the glass wool of the inner layer 201 in the sound insulation cover 2 is cured during the fire, so that the shape of the sound insulation cover 2 is maintained even during a fire.

  Here, in the event of a fire, the expansion material 1 expands also in the radially outward direction and comes into contact with the inner surface of the sound insulation cover 2, so that the expansion material 1 is held in this contacted state without falling. Further, since the glass wool of the inner layer 201 in the sound insulation cover 2 is cured in the event of a fire, the shape of the sound insulation cover 2 is maintained even in the event of a fire, so that the position of the expansion material 1 is reliably maintained. For this reason, the state in which the drainage channel of the drainage pipe P is closed (or covers a part of the drainage channel) by the expansion material 1 is maintained, and the spread of the upper floor via the collective drainage pipe P1 from the lower floor is suppressed. it can.

  In the present embodiment, as shown in the figure, the expansion material 1 and the sound insulation cover 2 are not physically connected, and the expansion material 1 is simply covered with the sound insulation cover 2. Since it is such a structure, since it can construct only by covering the expansion | swelling material 1 with the sound-insulation cover 2, it does not require the trouble of positioning of both, but it can construct easily.

(Second Embodiment)
Next, a second embodiment will be described. Here, portions different from those of the first embodiment will be mainly described, and the reference numerals are also given with the same reference numerals as those of the first embodiment. The sound insulation cover 2 of the present embodiment is attached to the drain pipe P so as to hang down as shown in FIG. In order to attach in this way, the spacer part 21 is formed in at least one part of the inner surface at the time of attachment of the sound insulation cover 2 in the part corresponding to the reduced diameter part P11 in the collective drainage pipe P1. The spacer portion 21 is formed as a part of the sound insulation cover 2 in the present embodiment, but may be formed separately from the sound insulation cover 2. As illustrated, the lower end of the spacer portion 21 is located above the receiving port portion P21. Since this spacer part 21 can fill the space between the floor slab S and the collective drainage pipe P1, it is possible to suppress the heat of the fire from being transmitted to the floor slab S during a fire on the lower floor. In addition, the vertical dimension of the spacer part 21 can also be made shorter than what is shown in FIG.

  Here, an example of the sound insulation cover 2 used in the present embodiment is shown in FIGS. As shown in FIG. 3A, the sound insulating cover 2 is formed with a plurality of slits 22 extending in the vertical direction at one end serving as a lower end when attached. In this manner, the plurality of slits 22 provided at one end can be deformed into a state where the portion where the slits 22 are formed is narrowed down. For this reason, when attaching the sound insulation cover 2 to the drain pipe P, it becomes easy to follow the level | step difference of the lower end of the receiving part P21, and the sound insulation cover 2 becomes easy to attach.

  Although not shown, a plurality of slits may be provided in the middle portion of the sound insulating cover 2 in the up-down direction when attached, as with the slits 22. Thus, the plurality of slits provided in the intermediate portion facilitates following the step at the upper end P211 of the receiving portion P21 when the sound insulating cover 2 is attached to the drain pipe P (see, for example, FIG. 1). It becomes easy to attach the sound insulation cover 2.

  Further, as shown in FIGS. 3A and 3B, a spacer portion 21 having a thickness dimension larger than that of other portions is formed slightly above the middle portion. This spacer portion 21 is a glass wool that constitutes the main body 20 of the sound insulating cover 2 with respect to the surface that becomes the inner surface when attached to the drain pipe P of the sound insulating cover 2 (the main body 20 of the sound insulating cover 2) in the first embodiment. It is formed by attaching glass wool with a lower density. In the present embodiment, the glass wool constituting the spacer portion 21 is attached to the glass wool constituting the main body 20 of the sound insulating cover 2 by the adhesive tape 21a, but may be attached by adhesion or a pin. By forming the spacer portion 21 in the sound insulation cover 2 in this manner, the sound insulation cover 2 can be attached without curving the outer surface as much as possible even when the diameter-reduced portion P11 is present in the collective drain pipe P1. The sound insulation cover 2 is less likely to be uneven, and the sound insulation cover 2 can be given a good appearance after installation. Further, the glass wool of the spacer portion 21 has a lower density than the glass wool constituting the main body 20 of the sound insulation cover 2 and is easily deformed. The vertical cross-sectional shape is changed from, for example, a rectangle shown in FIG. 3B to a wedge shape shown in FIG. It is possible to easily cope with a portion whose shape changes, such as the reduced diameter portion P11 in the collective drain pipe P1.

  As shown in FIG. 3A, a plurality of substantially U-shaped cuts 23a penetrating in the thickness direction are formed in the middle portion of the sound insulating cover 2 in the vertical direction. By this cut 23 a, a window portion 23 that can run over a portion surrounded by the cut 23 a is formed. In the state where the sound insulation cover 2 is attached to the drain pipe P, the inside covered with the sound insulation cover 2 can be visually recognized by turning the window portion 23 outward. For this reason, for example, a construction mistake such as forgetting to attach the expansion material 1 can be confirmed even after the sound insulation cover 2 is attached. Moreover, when performing the water leak test of the drain pipe P, the tester can visually recognize the drain pipe P through the window 23.

  Further, prior to attaching the sound insulating cover 2 to the drain pipe P, as shown in FIG. 3A, the adhesive tape 24 is attached to the left and right ends of the figure as shown in FIG. Can be formed. Thus, since the sound insulation cover 2 is made into a cylindrical shape in advance, the tubular sound insulation cover 2 can be attached simply by being inserted into the collecting drain pipe P1 or the standing pipe P2, so that the construction is easy.

(Third embodiment)
Next, a third embodiment will be described. Here, portions different from those in the first and second embodiments will be mainly described, and the reference numerals are also given with the same reference numerals as those in the first and second embodiments. As shown in FIG. 4, the sound insulating cover 2 of the present embodiment has an upper end 2H that is substantially coincident with the lower surface S2 of the floor slab S and does not overlap the floor slab S. In this embodiment, compared to the first and second embodiments, the sound insulation cover 2 does not need to be inserted into a narrow gap between the inner surface of the through hole S3 of the floor slab S and the outer surface of the collective drainage pipe P1, so that the construction is performed. Easy.

  The upper part of the sound insulation cover 2 is fixed by an upper fixing band 4. In the present embodiment, since the upper fixing band 4 is positioned in the vicinity of the lower surface S2 of the floor slab S, a resin binding band that is generally distributed is used in consideration of workability. However, since the upper fixing band 4 is made of resin, it melts and disappears in a fire. For this reason, in this embodiment, the hanging metal fitting 5 which prevents the sound insulation cover 2 from dropping at the time of a fire is attached to the collective drainage pipe P1. The hanging metal fitting 5 includes a band-shaped fastening portion 51 that is fixed to the outer peripheral surface of the collective drainage pipe P <b> 1, and a plurality of protruding portions 52 that protrude radially outward from the fastening portion 51. The projecting portion 52 penetrates the sound insulating cover 2, and even if the upper fixing band 4 disappears (burns out) in the event of a fire, the sound insulating cover 2 can be hung from the projecting portion 52. There is no. For this reason, since the position of the expanded expansion material 1 is maintained by the sound insulation cover 2 cured by the heat of the fire, the expansion channel 1 closes the drainage channel of the drain pipe P (or covers a part of the drainage channel). ) Is maintained, and the spread of fire on the upper floor through the collective drain pipe P1 from the lower floor can be suppressed.

(Fourth embodiment)
Next, a fourth embodiment will be described. Here, the parts different from the first to third embodiments will be mainly described, and the reference numerals are also given with the same reference numerals as those of the first to third embodiments. This embodiment is a modification of the second embodiment, and as shown in FIG. 5, the sound insulation cover 2 is divided into an upper cover 2a and a lower cover 2b. The upper cover 2a and the lower cover 2b are connected by a connecting member 6 having a U-shaped cross section penetrating the lower part of the upper cover 2a and the upper part of the lower cover 2b. Further, the spacer portion 21 of the present embodiment is provided from the upper end to the lower end of the upper cover 2a.

  In this embodiment, until the upper cover 2a and the lower cover 2b are connected by the connecting member 6, the collecting drainage pipe P1 and the standing pipe P2 can be exposed by rolling the covers 2a and 2b. For this reason, when performing the water leak test of the drain pipe P, since the tester exposes the drain pipe P and is directly visible, it is easy to perform the water leak test.

(Construction method)
Next, an example is explained about the construction method of constructing a drain pipe with a fire spread prevention mechanism. The simplest method is to attach the expansion material 1 to the receiving port P21 with respect to the collective drainage pipe P1 and the standpipe P2 already installed in the building, and attach the sheet-like sound insulation cover 2 to the collective drainage pipe P1 and the standpipe P2. The attachment member 3 is attached to the lower part of the winding and sound insulation cover 2. The upper part of the sound insulation cover 2 is fixed to the floor slab S by the mortar M filled in the through hole S3 of the floor slab S in the first and second embodiments. In the third embodiment, the upper fixed band 4 is fixed to the collective drain pipe P1.

  As another construction method, before the collective drain pipe P1 and the standpipe P2 are connected, the expansion material 1 is attached to the receiving port P21 of the standpipe P2, while the sound insulation cover 2 is bonded to the collective drain pipe P1. Attach it with And the collective drainage pipe P1 made into each said state is attached to the standing pipe P2. According to this construction method, when the collective drain pipe P1 is attached to the standing pipe P2, the expansion material 1 is covered with the sound insulation cover 2, so that a drain pipe with a fire spread prevention mechanism can be easily constructed.

  As another construction method, when the sound insulation cover 2 is divided into an upper cover 2a and a lower cover 2b, the upper cover 2a is attached to the collective drainage pipe P1 by adhesion or the like, and the lower cover 2b is attached to the vertical pipe P2 by the attachment member 3. Leave it attached. And the collective drainage pipe P1 made into each said state is attached to the standing pipe P2. Thereafter (specifically, after completion of the water leak test of the drain pipe P), the upper cover 2a and the lower cover 2b are connected using the connecting member 6. According to this construction method, even when the sound insulation cover 2 is divided into the upper cover 2a and the lower cover 2b, the expansion material 1 is attached to the sound insulation cover 2 ( Since the upper cover 2a and the lower cover 2b) are covered, a drain pipe with a fire spread prevention mechanism can be easily constructed.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to each said embodiment, A various change can be added in the range which does not deviate from the summary of this invention.

  For example, the fire spread prevention mechanism of the drain pipe can be applied to the drain pipe P in which the receiving port P21 is not formed in the standing pipe P2. That is, the lower end portion of the collective drainage pipe P1 has an enlarged diameter, and the drainage pipe P configured to insert the upper end portion of the standpipe P2 into the enlarged diameter portion, the collective drainage pipe P1 and the standpipe P2, It is applicable also to the drain pipe P comprised so that may be flange-connected.

DESCRIPTION OF SYMBOLS 1 Expansion material 2 Sound insulation cover 2H The upper end of a sound insulation cover 2L The lower end of a sound insulation cover 2a Upper cover 2b Lower cover 21 Spacer part 22 Slit 23 Window part 23a Notch 3 Mounting member 6 Connecting member P Drain pipe P1 Collective drain pipe P2 Standing pipe P21 Receptacle Part S Floor Slab

Claims (9)

A drainage pipe comprising a collective drainage pipe formed through a floor slab in a multi-story building and formed of a nonflammable material, and a standing pipe connected to the lower side of the collective drainage pipe and formed of a combustible material. In the drainage fire spread prevention mechanism attached to the
At the position below the lower end of the collective drainage pipe, it is attached to the outer peripheral surface of the standpipe, and when the standpipe burns out in the event of a fire, it expands in the radial direction due to the heat of the fire, and at least the drainage flow path An inflatable material covering a part,
It is formed of a sound-absorbing fireproof material, the upper end is attached to the collective drainage pipe, the lower end is attached to the standing pipe, and the running sound of the drainage pipe is outside the drainage pipe while covering the expansion material from the outside in the radial direction. A drainage prevention mechanism for a drain pipe, comprising a sound insulation cover that suppresses transmission to the drain. The upper end portion of the vertical pipe is formed with a receiving portion whose diameter is larger than that of the intermediate portion so that the lower end portion of the collective drainage pipe can be inserted.
2. The drainage spread prevention mechanism for a drain pipe according to claim 1, wherein the sound insulation cover includes a plurality of slits at one end when it is attached to the drain pipe. The upper end portion of the vertical pipe is formed with a receiving portion whose diameter is larger than that of the intermediate portion so that the lower end portion of the collective drainage pipe can be inserted.
The said sound insulation cover equips the intermediate part of the said sound insulation cover with the some slit which becomes an up-down direction when attached to the said drain pipe, The fire spread prevention mechanism of the drain pipe of Claim 1 or 2 characterized by the above-mentioned.   The said sound insulation cover is equipped with the window part which can be turned by formation of the notch penetrated in the thickness direction, The fire spread prevention mechanism of the drain pipe in any one of Claims 1-3 characterized by the above-mentioned.   The drainage prevention mechanism for a drain pipe according to any one of claims 1 to 4, wherein the sound insulation cover has a cylindrical shape.   The said sound insulation cover is provided with the spacer part with a thickness dimension larger than another part in the surface of the side facing the said drain pipe when attached to the said drain pipe, The any one of Claims 1-5 characterized by the above-mentioned. The fire spread prevention mechanism for drainage pipes as described in Crab.   The sound insulation cover includes an upper cover and a lower cover formed separately from each other, and a connecting member that connects the upper cover and the lower cover. The fire spread prevention mechanism of the drain pipe as described in 2. Fire spread prevention provided with a collective drain pipe that is installed through a floor slab in a multi-story building and formed of a non-flammable material, and a standing pipe that is connected to the lower side of the collective drain pipe and formed of a flammable material In the construction method of drainage pipe with mechanism,
When the vertical pipe is burned out in the event of a fire on the outer peripheral surface of the vertical pipe, an expansion material that expands radially inward due to the heat of the fire and covers at least a part of the drainage channel is attached,
A construction method for constructing a drain pipe with a fire spread prevention mechanism, characterized in that the collective drain pipe having a sound insulation cover made of a sound-absorbing fireproof material is attached to the vertical pipe. Fire spread prevention provided with a collective drain pipe that is installed through a floor slab in a multi-story building and formed of a non-flammable material, and a standing pipe that is connected to the lower side of the collective drain pipe and formed of a flammable material In the construction method of drainage pipe with mechanism,
When the vertical pipe is burned out in the event of a fire on the outer peripheral surface of the vertical pipe, an expansion material that expands radially inward due to the heat of the fire and covers at least a part of the drainage channel is attached,
An upper cover formed of a sound-resistant fireproof material is attached to the collective drainage pipe, and a lower cover formed of a sound-absorbing fireproof material is attached to the vertical pipe,
A method of constructing a drain pipe with a fire spread prevention mechanism, wherein the collective drain pipe is attached to the standing pipe, and then the upper cover and the lower cover are connected using a connecting member.

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