JP2017086769A - Fire protection structure and construction method for fire protection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire protection structure and the like that are capable of securing fire protection performance of piping protruding obliquely from a section part, using a simple method.SOLUTION: A fire protection member 5 is provided at piping 7's part exposing from a partition part 3. The fire protection member 5 is pasted on the outer periphery of the piping 7, where the fire protection member 5 is arranged so that the fire protection member 5's one end in the width direction is positioned at a surface position of the partition part 3. The fire protection member 5 is arranged so that the fire protection member 5's longer direction is approximately in parallel with the surface of the partition part 3 and along the piping 7's longer direction. Or, the fire protection member 5 is arranged so that the fire protection member 5's longer direction is arranged along the surface of the partition part 3 and is arranged not perpendicular to but obliquely against the piping 7's axial direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to, for example, a fire prevention structure for ensuring fire prevention performance of a through portion of a pipe to a partition portion.

  Cables may be laid in each room such as a building. In this case, for example, a pipe may be buried in the ceiling and a cable may be laid in the pipe. However, if a fire breaks out in one room, it can travel along the pipe and spread to the other room, possibly causing serious damage.

  As a fire prevention structure for piping that penetrates such a partition portion, for example, there is a method in which a recess is formed in the partition portion and a holding member that holds a thermal expansion member is disposed in the portion (for example, Patent Document 1).

JP 10-137353 A

  FIG. 8 is a view showing a conventional fire prevention structure 100. The partition part 103 is a ceiling, for example, and the piping 107 is embed | buried under it. The pipe 107 is a flexible pipe, is gently bent inside the partition 103, and penetrates between adjacent rooms. Accordingly, the pipe 107 protrudes obliquely with respect to the surface of the partition part 103.

  A concave portion 109 is provided on a lower surface of the partition portion 103 and a portion from which the pipe 107 protrudes. That is, the pipe 107 is exposed from the recess 109 to each room. The concave portion 109 is formed obliquely with respect to the lower surface of the partition portion 103 in the direction of the pipe 107. Therefore, a part of the inner surface of the recess 109 has a surface substantially perpendicular to the axial direction of the pipe 107.

  A metallic cylinder member 105 is disposed on the outer periphery of the pipe 107 exposed in the recess 109. A thermal expansion member is disposed on the inner surface of the cylindrical member 105. That is, a thermal expansion member is disposed between the tubular member 105 and the pipe 107. Therefore, in the event of a fire or the like, the thermal expansion member expands inside the cylindrical member 105, crushes the softened pipe 107 to close the space, and the flame propagates through the inside of the partition 103 and spreads to other rooms. Is prevented.

  Here, the cylinder member 105 is a member for holding a thermal expansion member. Further, in order to hold the thermal expansion member over the entire outer periphery of the pipe 107, the cylindrical member 105 needs to be a member coaxial with the pipe 107. That is, for the pipe 107 protruding obliquely from the partition part 103, it is necessary to dispose the cylindrical member 105 obliquely with respect to the partition part 103. For this reason, it is necessary to form the recessed part 109 according to the cylinder member 105 in the partition part 103 as a space which arrange | positions the cylinder member 105. FIG.

  However, such a structure has a large number of parts and a complicated structure. In particular, since the concave portion 109 is formed on the lower surface of the partition portion 103 and the cylindrical member 105 needs to be disposed on the outer periphery of the pipe 107, the construction is not easy.

  On the other hand, when the partition 103 and the pipe 107 are oblique, a special member is required to obtain a fire prevention structure without forming the oblique recess 109 for arranging the cylindrical member 105 and the like. is there. For example, in order to hold the thermal expansion member in a direction (circumferential direction) substantially perpendicular to the axial direction of the pipe 107, the fixing part that can be fixed to the partition part 103 and the pipe 107 that is oblique to the fixing part are covered. A member having a holding portion is required. However, in this case, since it is a special member, the cost increases, and different members are required depending on the protruding angle of the pipe 107.

  Further, if the outer periphery of the pipe 107 is simply filled with putty without using such a member, the workability is poor and the putty may fall off. In addition, the direction in which the putty is inflated cannot be regulated, and it is difficult to efficiently inflate the putty in the direction in which the pipe 107 is crushed. Furthermore, since it is necessary to reliably fill the entire circumference of the pipe 107 with putty, the amount of putty used increases and the cost increases.

  This invention is made in view of such a problem, and it aims at providing the fire prevention structure etc. which can ensure the fire prevention performance of piping which protrudes diagonally from a division part by a simple method. .

  In order to achieve the above-described object, the first invention includes a pipe embedded in the partition part, and a fire prevention member provided in the pipe exposed from the partition part, and the pipe includes the partition part. Projecting obliquely with respect to the surface, the fire protection member has a multi-layer structure of a support layer and a thermal expansion layer, the end in the width direction of the fire protection member is located at the surface position of the partition part, The fireproof member is arranged so that the longitudinal direction is substantially parallel to the surface of the partition part, and the fireproof member faces the support layer outward and extends over the entire circumference of the pipe. It is a fireproof structure characterized by being attached obliquely.

  The thermal expansion layer is preferably made of a non-curing self-bonding putty member.

  It is desirable that a cut is formed at the end of the fireproof member, and the end in the width direction of the fireproof member is in close contact with the partition.

  Both ends of the pipe may protrude into each partitioned room, and the fire prevention member may be disposed only on one end side of the pipe protruding into one room.

  According to the first invention, the fire-proof member is disposed such that the end portion in the width direction of the fire-proof member is positioned at the surface position of the partition part, and the longitudinal direction of the fire-proof member is substantially parallel to the surface of the partition part. Thus, fire prevention performance can be reliably ensured even with respect to the pipe projecting obliquely with respect to the partition portion. At this time, it is not necessary to form a recess or the like in the partition part, and it is not necessary to use a metal member or the like that holds the thermal expansion member.

  In addition, since the support layer is provided on the outer surface of the fire prevention member, the thermal expansion layer can be reliably expanded in the inner surface direction.

  Further, if the thermal expansion layer is a non-curing self-bonding type made of butyl rubber or the like, an adhesive or the like is unnecessary, and the falling off can be prevented by its own adhesive force. For this reason, members, such as a band for hold | maintaining a fire prevention member, are unnecessary. Moreover, since it is a self-fusing type, once it is fused, the thermal expansion layers are substantially integrated on the fused surface, and there is no risk of the fire-proof member falling off due to a decrease in adhesive force.

  Moreover, a part of fireproof member can also be stuck to the surface of a partition part by making a notch in a part of fireproof member and opening the edge part of a fireproof member by notch. For this reason, it is possible to reliably close the gap between the fireproof member and the partition part and to prevent the fireproof member from falling off.

  Moreover, such a fireproof member should just be formed in at least one exposed from a division part, and is excellent also in workability | operativity.

  2nd invention is the construction method of the fire prevention structure to piping embed | buried in a division part, Comprising: The said piping protrudes diagonally with respect to the surface of the said division part, and is a multilayer structure of a support layer and a thermal expansion layer With respect to the pipe exposed from the partition portion, the end portion in the width direction of the fire protection member is set as the surface position of the partition portion, and the longitudinal direction of the fire protection member is substantially parallel to the surface of the partition portion. The fire protection member is disposed on the pipe, and the fire protection member is attached to the pipe obliquely over the entire circumference of the pipe with the support layer facing outward. It is a construction method.

  According to 2nd invention, a fire prevention structure can be constructed | assembled with respect to piping which protrudes diagonally from a partition part by a simple method.

  ADVANTAGE OF THE INVENTION According to this invention, the fire prevention structure etc. which can ensure the fire prevention performance of piping which protrudes diagonally from a division part by a simple method can be provided.

The figure which shows the fire prevention structure 1. FIG. The perspective view which shows the fire prevention member 5. FIG. The figure which shows the fire prevention member 5. FIG. (A) is the sectional view on the AA line of FIG. 1, (b) is the B section enlarged view of (a). The figure which shows the procedure which constructs the fire prevention structure. (A) is sectional drawing of the state before thermal expansion, (b) is sectional drawing of the state after thermal expansion. The figure which shows other embodiment. The figure which shows the conventional fire prevention structure 100. FIG.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a view showing a fire prevention structure 1 according to the present invention. The fire prevention structure 1 mainly includes a pipe 7 and a fire prevention member 5.

  The partition unit 3 is, for example, a ceiling or a wall. In the following description, it is assumed that the partition unit 3 is a ceiling. A piping 7 is embedded in the partition part 3. The pipe 7 is gently bent in the partition part 3. An electric wire is inserted through the pipe 7.

  From the lower surface of the partition part 3, the pipe 7 is exposed on each side with another partition part (for example, a wall) in between. That is, the pipe 7 protrudes obliquely with respect to the surface of the partition part 3. In addition, the recessed part etc. are not provided in the partition part 3 of the site | part from which the piping 7 protrudes, but it is substantially flat with respect to another site | part.

  A fire prevention member 5 is provided in a portion of the pipe 7 exposed from the partition portion 3. In addition, although the both ends of the piping 7 protrude in each compartment which was divided, in the example shown, the fire prevention member 5 is arrange | positioned only at the one piping 7 side which protrudes in one chamber. That is, in the present invention, the fire prevention member 5 may be formed only on one exposed portion of the pipe 7. Note that the fire prevention member 5 may be disposed on both exposed portions of the pipe 7.

  FIG. 2 is a perspective view showing the fire prevention member 5, and is a perspective view of the pipe 7. The fire prevention member 5 is attached to the outer periphery of the pipe 7. At this time, one end of the fire prevention member 5 in the width direction (vertical direction in FIG. 1) is positioned at the surface position of the partition 3 (positioned so that at least a part thereof is in contact with the partition 3). The fire prevention member 5 is arranged.

  Moreover, the fire prevention member 5 is arrange | positioned so that the longitudinal direction of the fire prevention member 5 may be substantially parallel to the surface of the partition part 3, and may follow the longitudinal direction of the piping 7 (left-right direction of FIG. 1). Here, disposing substantially parallel to the surface of the partition portion 3 along the longitudinal direction of the pipe 7 is within the bent surface of the pipe 7 and is the innermost position where the pipe 7 projects from the partition portion 3. It means that the fire prevention member 5 is arranged so as to pass through (point X in FIG. 1) and the outermost position (point Y in FIG. 1). That is, the fire prevention member 5 is arranged so that the longitudinal direction of the fire prevention member 5 is arranged along the surface of the partition part 3 and is not inclined in the direction perpendicular to the axial direction of the pipe 7.

  FIG. 3 is a perspective view showing a state in which the fire prevention member 5 is developed. The fire prevention member 5 is a tape-shaped member. The fire prevention member 5 has a multilayer structure of a thermal expansion layer 5a and a support layer 5b.

  The support layer 5b is a fire-resistant member such as a glass cloth, and is composed of a member having small stretchability. The thermal expansion layer 5a is configured by a thermal expansion member that expands due to heat. For example, the volume of the thermal expansion layer 5a expands from several times to several tens of times that of a normal time due to heat during a fire. At this time, the support layer 5b hardly expands or contracts due to heat. Note that a release sheet is provided on the surface of the thermal expansion layer 5a, and the release sheet is peeled off during use.

  4A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 4B is an enlarged view of a portion B in FIG. 4A. In the illustrated example, an example in which one electric wire 9 is accommodated in the pipe 7 is shown, but the form and number of the electric wires 9 are not limited to the illustrated example.

  As described above, the fire prevention member 5 is attached to the outer periphery of the pipe 7. At this time, the fire prevention member 5 is attached to the pipe 7 obliquely over the entire outer periphery of the pipe 7 with the support layer 5 b facing outward. That is, the fire prevention member 5 is attached to the outer periphery of the pipe 7 so that the thermal expansion layer 5a and the pipe 7 are in contact with each other.

  Moreover, the fireproof member 5 is stuck on the outer periphery of the pipe 7 so as to be sandwiched from both sides of the pipe 7, and the opposing thermal expansion layers 5a are bonded to each other on both sides. That is, the fire-proof member 5 needs to have a length that covers the entire pipe 7 even when the pipe 7 is disposed obliquely and that the fire-proof members 5 can contact each other.

  Here, the thermal expansion layer 5a contains at least a specific binder resin, a resin balloon, and expandable graphite. The thermal expansion layer 5a of the present invention does not contain a curable component, its physical properties are non-curable, and it is made of a self-bonding putty member.

[Binder resin]
The binder resin used for the thermal expansion layer 5a is not particularly limited as long as it is a resin capable of putting the composition into a putty shape, and a commonly used resin can be adopted. For example, the binder resin is one or more selected from the group consisting of polybutene, polybutadiene, styrene butadiene rubber, butyl rubber, ethylene propylene (EP) rubber, ethylene propylene diene (EPDM) rubber, chloroprene rubber, and isoprene rubber. It can be set as the structure containing resin.
The binder resin more preferably contains one or more selected from the group consisting of polybutene, polybutadiene, butyl rubber, and isoprene rubber, more preferably one or two selected from the group consisting of polybutene, polybutadiene, and butyl rubber. It consists of more than seed resin.

  In the thermal expansion layer 5a, the content of the binder resin is preferably 15.0 to 50.0% by mass from the viewpoint of putting the composition into a putty shape and a putty having good hardness, and 18.0 to 45%. 0.0 mass% is more preferable, and 20.0-40.0 mass% is further more preferable. The binder resin can be obtained by synthesis by a conventional method. Moreover, you may use a commercial item.

[Resin micro-balloon]
The resin balloon used for the thermal expansion layer 5a is a hollow, lightweight particle having a spherical resin shell. In general, a resin is molded in a state in which a liquid gas is encapsulated, and this is heat-treated, so that it is expanded several tens of times in volume to obtain hollow spherical particles having a desired particle size. Resin balloons have moderate elasticity and are not easily destroyed by pressure or mechanical stress.
The resin balloon plays a role like a cushion against the shear stress during the kneading process at the time of manufacturing the putty composition, and exhibits an action of effectively suppressing the breakage (collapse) of the expandable graphite described later. Thereby, it can mix in the state which maintained the thermal expansion performance which expansible graphite inherently has favorable, and can prepare a putty composition.
In addition, by blending a resin balloon, it is possible to take a long time until the expandable graphite is crushed and the thermal expansion performance is deteriorated in the kneading step. Variations in the quality of the composition can be suppressed.
Moreover, when the shell of the resin balloon is torn during a fire, the liquid gas (hydrocarbon etc.) in the balloon burns, and the thermal expansion of the expandable graphite existing in the vicinity can be effectively promoted.

The resin constituting the shell of the resin balloon is not particularly limited as long as the resin balloon can be formed. For example, the resin constituting the shell of the resin balloon can be configured to include a resin selected from the group consisting of acrylonitrile resin, phenol resin, and vinylidene chloride resin. Especially, it is preferable that resin which comprises the shell of a resin balloon consists of resin chosen from the group which consists of acrylonitrile resin, a phenol resin, and vinylidene chloride resin. In the present specification, the resin selected from the group consisting of acrylonitrile resin, phenol resin, and vinylidene chloride resin is selected from the group consisting of acrylonitrile resin, phenol resin, and vinylidene chloride resin as long as the effects of the present invention are not impaired. It is meant to include a modified resin, for example, a copolymer.
When the shell of the resin balloon contains a resin selected from the group consisting of acrylonitrile resin, phenol resin, and vinylidene chloride resin, it is possible to effectively suppress the collapse of expandable graphite during pressure kneading. Further, it is considered that the shell tends to cause incomplete combustion at the time of combustion, and the generated soot acts as a binder and acts to suppress the putty of the putty after thermal expansion.

The average particle diameter of the resin balloon used for the thermal expansion layer 5a is usually 10 to 150 μm, and more preferably 50 to 80 μm. The average particle diameter was determined by measuring the particle size distribution by a laser diffraction method (measuring instrument: SALD-2000 / Shimadzu Corporation), and was the particle diameter when the cumulative volume was 50%.
The true specific gravity of the resin balloon used for the thermal expansion layer 5a is preferably 0.02 to 0.07. Therefore, by using a resin balloon, the putty composition can be reduced in weight, and transportability or workability can be improved.
The resin balloon may be used as it is, or a product having a true specific gravity of about 0.1 to 0.3 may be used by combining with an inorganic powder for easy handling.

  In order to effectively express the above action, the content of the resin balloon in the thermal expansion layer 5a is preferably 0.4 to 15.0 mass%, more preferably 2.0 to 14.0 mass%, 2.5-13.0 mass% is further more preferable.

  The resin balloon used for the thermal expansion layer 5a can be manufactured by a conventional method, and a commercially available product can also be used. Commercially available resin balloons include, for example, EMC40 (trade name, manufactured by Nippon Philite), Fenoset Microsphere BJO-930 (trade name, manufactured by Malayan Adhesive & Chemicals), Matsumoto Microsphere (trade name, Matsumoto Yushi Seiyaku Co., Ltd.) Manufactured).

[Expandable graphite]
The expansive graphite used for the thermal expansion layer 5a inserts a thermally decomposable substance between each layer of hexagonal crystals in which two-dimensionally spreading six-membered network plane layers are laminated in the C-axis direction. Interlayer compound. For example, after immersing graphite in an oxidizing solution containing fuming sulfuric acid, sulfuric acid and concentrated nitric acid, various nitrates, perchloric acid, various perchlorates, chromic acid, various chromates, dichromic acid, etc., then rinse with water Manufactured by drying.
When expansive graphite is heated rapidly, the compound inserted between the layers and the compound inserted into the crystal grain boundary are thermally decomposed, and the pressure of the decomposition gas generated at that time pushes the space between the layers. Swell.

  It is preferable to use expansive graphite in powder form. From the viewpoint of effectively expressing the thermal expansibility of the thermally expansible graphite, the expandable graphite content in the thermally expandable layer 5a is preferably 5.0 to 40.0 mass%, and 6.0 to 35.0. % By mass is more preferable, and 7.0 to 30.0% by mass is more preferable.

In the thermal expansion layer 5a, the ratio of the resin balloon content to the expandable graphite content (resin balloon content / expandable graphite content (volume ratio)) is preferably 0.2 to 14.0, 2.0-13.0 are more preferable, 2.1-12.0 are more preferable, and 2.3-10.0 are further more preferable.
By making the ratio of the contents of expandable graphite and resin balloon within the above preferred range, the destruction of expandable graphite during production can be more effectively suppressed, and the thermal expansion performance of the putty composition can be further enhanced.

  Expandable graphite is commercially available. For example, SS-3 (trade name, manufactured by Air Water), 955025L (trade name, manufactured by Ito Graphite Industries, Ltd.) and the like can be used.

[Inorganic filler]
The thermal expansion layer 5a contains, as an inorganic filler, one or more selected from the group consisting of aluminum hydroxide, magnesium hydroxide, talc, clay, calcium carbonate, inorganic balloon, aluminum oxide, magnesium oxide, and silica. In this case, it is more preferable to include one or more selected from the group consisting of aluminum hydroxide, magnesium hydroxide, talc, and calcium carbonate.
In order for the thermal expansion layer 5a to maintain a good shape during a fire without increasing the specific gravity of the thermal expansion layer 5a so much, the content of the inorganic filler in the thermal expansion layer 5a is 50.0. The mass% or less is preferable, and 40.0 mass% or less is more preferable. Further, the thermal expansion layer 5a may not contain an inorganic filler, but the thermal expansion layer 5a preferably contains 5% by mass or more of an inorganic filler, more preferably 10% by mass or more, More preferably, the content is 15% by mass or more.

[Flame retardant (deformation inhibitor)]
The thermal expansion layer 5a preferably contains a flame retardant. The flame retardant has the effect of suppressing the deformation of the putty composition during a fire. The flame retardant is preferably one or more selected from the group consisting of polyphenylene ether, phosphate ester, red phosphorus, and ammonium polyphosphate, and one or two selected from ammonium polyphosphate and polyphenylene ether Is preferred.
In the thermal expansion layer 5a, the content of the flame retardant is preferably 40.0% by mass or less, more preferably 5.0 to 35.0% by mass, and still more preferably 10.0 to 35.0% by mass. Note that, as the content of the flame retardant increases, the effect of suppressing the deformation of the shape increases.

[Plasticizer]
A plasticizer can be used for the thermal expansion layer 5a in order to improve the softness, adhesiveness, and touch of the composition. Further, when a plasticizer is used, when the object to be contacted by the thermal expansion layer 5a is a PVC sheath containing a plasticizer, it is possible to prevent the migration of the plasticizer between them and to suppress the influence of the migration of the plasticizer. As the plasticizer, benzoic acid ester compounds, epoxy compounds, phosphoric acid ester compounds, chlorinated paraffin compounds, adipic acid compounds, phthalic acid ester compounds, and the like are suitable.
When the thermal expansion layer 5a contains a plasticizer, the content of the plasticizer in the thermal expansion layer 5a is preferably 5.0 to 20.0 mass%, and more preferably 7.0 to 16.0 mass%.

  In the thermal expansion layer 5a, in addition to the components described above, a surfactant, a lubricant or the like may be added as a processing aid for facilitating the production. Moreover, you may mix | blend an appropriate quantity with the anti-aging agent for a storage property and a weather resistance improvement, the fiber chip for the shape retention property improvement at the time of construction, etc.

[Method for Producing Thermal Expansion Layer 5a]
The thermal expansion layer 5a according to the present embodiment can be obtained by kneading each raw material by a conventional method using a known kneader mixer, Banbury mixer or the like to obtain a homogeneous putty-like composition.
The temperature during kneading is preferably 60 to 70 ° C. The kneading time is preferably 5 to 20 minutes.

  Thus, by making the thermal expansion layer 5a a non-curing self-bonding type made of butyl rubber or the like, the thermal expansion layer 5a can be easily bonded to the outer periphery of the pipe 7, and the thermal expansion layer 5a. They can be easily bonded together. Further, the thermal expansion layer 5a has an extremely strong adhesive force, and there is no decrease in the adhesive force due to deterioration. In the case where the thermal expansion layer 5a is not a self-bonding type, a separate adhesive layer may be provided on the surface of the thermal expansion layer 5a.

  Next, the construction method of the fire prevention structure 1 will be described. As shown in FIG. 5, the above-described fire prevention member 5 is disposed on the outer periphery of the pipe 7 protruding from the partition portion 3 so that the thermal expansion layer 5 a is on the pipe 7 side. Under the present circumstances, it arrange | positions so that the longitudinal direction of the fire prevention member 5 may become substantially parallel to the surface of the division part 3. FIG.

  Desirably, it arrange | positions so that the long side of the fire prevention member 5 may contact the surface of the division part 3 over the full length. At this time, it is not always necessary that the entire length of the irregularities of the partition part 3 (for example, when there is a partial chip in the vicinity of the portion where the pipe 7 protrudes) be in contact with the partition part 3. That is, the end portion of the fire prevention member 5 in the width direction is positioned at the surface position (on the extension line) of the partition portion 3.

  Next, the fireproof member 5 is bent (arrow C in the figure), and the fireproof member 5 is attached to the outer periphery of the pipe 7. Moreover, the opposing surfaces of the thermal expansion layers 5a of the fireproof member 5 bring the thermal expansion layers 5a into close contact with each other. At this time, the ends of the fire prevention member 5 are closely attached to each other in the width direction of the fire prevention member 5. That is, the fire prevention member 5 is arranged so that the pipe 7 is not exposed at a portion corresponding to the width of the fire prevention member 5. Further, by setting the width of the fire prevention member 5 to a predetermined value or more, at least a part of the circumferential direction in the direction perpendicular to the longitudinal direction of the pipe 7 is covered with the fire prevention member 5 over the entire circumference. Thus, the fire prevention structure 1 is formed.

  Next, the function of the fire prevention structure 1 will be described. Fig.6 (a) is sectional drawing of the fire prevention structure 1 in normal time, and respond | corresponds to Fig.4 (a). When a fire occurs, the pipe 7 is softened. Further, the thermal expansion layer 5a of the fireproof member 5 starts to expand. At this time, the support layer 5 b is provided on the outer surface side of the fire prevention member 5. Since the support layer 5b has almost no elasticity, the thermal expansion layer 5a expands inward (arrow D in the figure).

  When the thermal expansion layer 5a expands, the pipe 7 softened by the expansion force is crushed. For this reason, the clearance gap between the piping 7 and the electric wire 9 is filled, and it can suppress that a flame and heat | fever transmit along the piping 7. FIG. In addition, when the coating part of the piping 7 and the electric wire 9 burns, since the gap is further closed by the expansion of the thermal expansion layer 5a, it is possible to prevent the fire from spreading.

  As shown in FIG. 1, if the fire prevention member 5 is disposed only on one side of the pipe 7, for example, when a fire occurs in the space on the right side in the figure, the fire If there is a fire in the space on the left side of the figure, there is a risk that the fire may propagate through the inside of the partition part 3, but on the exit side of the partition part 3 to the right side space Can be prevented.

  As described above, according to the present embodiment, no special fixture or recess processing on the partition portion 3 is required for the pipe 7 projecting obliquely from the partition portion 3. For this reason, the fire prevention structure 1 can be easily constructed even after the partition part 3 is constructed of concrete or the like. Moreover, since it only winds the fire prevention member 5 around the piping 7, construction time is also short. For this reason, the fire prevention structure 1 can be easily formed with a simple structure.

  Moreover, the fire prevention structure 1 can be reliably formed by the same member and method irrespective of the projection angle of the pipe 7. For this reason, it is not necessary to use a different member for every installation place, and it is cost-saving.

  Moreover, since the thermal expansion layer 5a of the fireproof member 5 is a self-fusion type, the fireproof member 5 can be fixed only by sticking the fireproof member 5 to the outer periphery of the pipe 7. For this reason, members, such as a band, are unnecessary and fixation is also easy. Further, since no adhesive or the like is used, there is no decrease in adhesive force due to deterioration, and the fire-proof member 5 can be prevented from falling off.

  Moreover, since the fireproof member 5 is a tape-shaped member, the handleability is good. Moreover, compared with the case where putty is used, fire prevention performance can be ensured with the minimum amount of use of the thermal expansion member.

  Moreover, since the fireproof member 5 has a laminated structure of the thermal expansion layer 5a and the support layer 5b, the expansion direction of the thermal expansion layer 5a can be regulated inward. For this reason, the clearance gap produced by the piping 7 by the expansion | swelling of the thermal expansion layer 5a can be closed efficiently.

  Thus, conventionally, when forming a fire prevention structure using a fire prevention member, since it was thought that it was necessary to wind a fire prevention member in the direction perpendicular to the axial direction of the piping 7, there is a gap with the partition part 3. In order not to occur, a concave portion is formed in the partition portion 3 or a separate holding member is used. However, in the present invention, the winding method of the fire prevention member 5 is changed from the conventional one by changing the way of thinking. The fireproof performance can be easily secured with a simple structure.

  Next, a second embodiment will be described. FIG. 7 is a diagram illustrating a winding method of the fire protection member 5 according to the second embodiment. In the following description, components having the same functions as those of the first embodiment are denoted by the same reference numerals as those in FIGS. 1 to 6, and redundant descriptions are omitted.

  The second embodiment is substantially the same as the first embodiment, but differs in that a cut 11 is formed in a part of the fire protection member 5. The notch 11 is a substantially central portion in the longitudinal direction of the fire prevention member 5 and is formed in a part in the width direction. The fire prevention member 5 is folded back at the position of the notch 11 and attached to the outer periphery of the pipe 7.

  As for the fire prevention member 5, the range in which the cut 11 in the width direction is formed is opened to the outside. That is, the expanded part of the fire prevention member 5 becomes a surface substantially parallel to the surface of the partition part 3. Accordingly, the fire prevention member 5 covers the outer periphery of the pipe 7 so that the pipe 7 is sandwiched between the faces facing each other, and a part of the end of the fire prevention member 5 in the width direction is covered with the surface of the partition part 3. Can be adhered to.

  According to the second embodiment, an effect similar to that of the first embodiment can be obtained. Moreover, since the notch 11 is formed in the edge part of the fire prevention member 5, and the edge part of the width direction of the fire prevention member 5 closely_contact | adheres to the division part 3, adhering a part of fire prevention member 5 to the surface of the division part 3 Can do. For this reason, it is possible to more reliably prevent the fireproof member 5 from falling off and to fill the gap between the partition portion 3 and the fireproof member 5.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1 ......... Fire prevention structure 3 ......... Division part 5 ......... Fire prevention member 5a ......... The thermal expansion layer 5b ......... Support layer 7 ......... Pipe 9 ......... Electric wire 11 ......... Incision 100 ......... Fire prevention structure 103 ......... Division part 105 ......... Cylinder member 107 ......... Piping 109 ......... Concavity

Claims (5)

Piping buried in the compartment,
A fireproof member provided on the pipe exposed from the partition;
Comprising
The pipe projects obliquely with respect to the surface of the partition part,
The fireproof member has a multilayer structure of a support layer and a thermal expansion layer,
The fireproof member is disposed such that an end in the width direction of the fireproof member is located at a surface position of the partition part, and a longitudinal direction of the fireproof member is substantially parallel to the surface of the partition part,
The fireproof structure is characterized in that the fireproof member is obliquely attached to the pipe over the entire circumference of the outer periphery of the pipe with the support layer facing outward.   The fireproof structure according to claim 1, wherein the thermal expansion layer is made of a non-curable self-bonding putty member.   The fireproof structure according to claim 1 or 2, wherein a notch is formed in an end portion of the fireproof member, and an end portion in the width direction of the fireproof member is in close contact with the partition portion. Both ends of the pipe protrude into the compartments separated from each other,
The fireproof structure according to any one of claims 1 to 3, wherein the fireproof member is disposed only on one end side of the pipe projecting into one room. It is a construction method of a fire prevention structure to a pipe buried in a partition part,
The pipe projects obliquely with respect to the surface of the partition part,
Using a fire prevention member with a multilayer structure of a support layer and a thermal expansion layer,
With respect to the pipe exposed from the partition part, an end part in the width direction of the fire protection member is set as a surface position of the partition part, and the fire prevention member is arranged so that the longitudinal direction of the fire protection member is substantially parallel to the surface of the partition part. And the construction method of the fireproof structure characterized by sticking the said fireproof member diagonally with respect to the said piping over the perimeter of the said piping with the said support layer facing outward.

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