JP6508983B2 - Fire protection structure - Google Patents

Description

  The present invention relates to a fire protection structure provided in a clearance space between a through hole formed in a fireproof structure and a plurality of elongated members inserted through the through hole.

  Generally, the interior space of a building is divided into a plurality of room spaces by structures such as walls, floors and ceilings. When a fire occurs in a certain room space, a fire resistant structure (fire resistant structure) may be used to prevent the fire from expanding to another room space. When a long body such as a pipe or a cable is inserted into a through hole formed in a fireproof structure, a flame may pass through the gap between the through hole and the long body and burn out. It is necessary to apply fire protection to this through hole. Performing such fire prevention measures using a thermally expandable fireproof sheet material is known, for example, from FIG. 4 of JP-A-2002-119608 (Patent Document 1).

  In the fire protection structure of Patent Document 1, the thermally expandable fireproof sheet material is wound around the elongated body and is in close contact with the outer surface of the elongated body. In this case, when a plurality of elongated bodies are inserted through the through holes, in order to secure fire resistance performance, it is a fact that each elongated body is individually wound with a thermally expandable fireproof sheet material. It is. However, such a construction method requires an operation of winding the thermally expandable fireproof sheet material by the number of the long members to be collectively inserted into the through holes, and the construction method is inferior.

JP, 2002-119608, A

  In the fire protection structure in which a plurality of elongated bodies are collectively inserted through the through holes of the fireproof structure, it is desired to improve the workability while securing the fireproof performance.

The fire protection structure according to the present invention is
A fire protection structure provided in a clearance space between a through hole formed in a fireproof structure and a plurality of elongated members inserted into the through hole,
A plurality of the elongated bodies are co-wound using a flexible sheet-like thermally expandable fireproof sheet material having a uniform thickness as a whole;
Partial sheet material formed by separating a part of the thermally expandable fire resistant sheet material in a gap portion surrounded by the respective outer surfaces of the elongated bodies adjacent to each other and the thermally expandable fire resistant sheet material circumscribed to them Is arranged.

  According to this configuration, since the plurality of elongated bodies are co-wound using the thermally expandable fire resistant sheet material, the thermally expandable fire resistant sheet is obtained regardless of the number of elongated bodies collectively inserted into the through holes. The work of winding the material is only required once. Therefore, compared with the structure which winds each elongate body individually with a thermally expansible fireproof sheet material, construction property can be improved. Between the outer surfaces of the mutually adjacent elongated bodies and the thermally expandable fireproof sheet material, there is a gap portion surrounded by them, and this gap portion separates a part of the thermally expandable fireproof sheet material It is at least partially filled with the partial sheet material to be formed. Therefore, even in the case of co-winding a plurality of elongated bodies with a thermally expandable fire resistant sheet material, fire resistance performance not inferior to the structure of individually winding each elongated body with a thermally expandable fire resistant sheet material is secured can do. In addition, since the gap portion is filled with the material (partial sheet material) derived from the thermally expandable fireproof sheet material used for co-winding, there is no need to separately prepare a dedicated member for filling the gap portion, and the gap The work to fill in the parts is also relatively easy. Since the partial sheet material is easy to separate at any position of the thermally expandable fire resistant sheet material, a partial sheet material of a desired length can be easily obtained. Therefore, the workability can be improved also from these points. Therefore, in the fire protection structure in which a plurality of elongated bodies are collectively inserted into the through hole of the fireproof structure, the workability can be improved while securing the fireproof performance.

  Hereinafter, preferred embodiments of the present invention will be described. However, the scope of the present invention is not limited by the preferred embodiments described below.

  As one aspect, it is preferable that the thermally expandable fireproof sheet material has a plurality of recessed groove portions formed in parallel with each other and extending in the width direction on the surface on one side thereof.

  According to this configuration, the thermally expandable fireproof sheet material can be easily deformed along the outer surface of each elongated body, so co-winding work on a plurality of elongated bodies can be easily performed. Further, since the thickness of the thermally expandable fire resistant sheet material is reduced at the bottom of the recessed groove portion, the thermally expandable fire resistant sheet material can be easily separated along the thin recessed groove portion to obtain a partial sheet material . Therefore, the workability can be improved also from these points.

  In one aspect, the partial sheet material is separated from the thermally expandable fire resistant sheet material so as to include a plurality of ridges defined between adjacent ones of the recessed groove portions in the thermally expandable fire resistant sheet material. It is preferable that the plurality of protruding portions be disposed in the gap portion in a state of being folded back-to-back at the location of the recessed groove portion.

  According to this configuration, it is possible to easily give the partial sheet material a three-dimensional shape by folding the plurality of ridges back-to-back along the thin recessed groove. Therefore, more parts of the gap between the respective outer surfaces of the mutually adjacent elongated members and the thermally expandable fire resistant sheet material can be filled by a relatively simple operation, thereby further improving the workability. Can. Further, with this configuration, the rigidity of the entire partial sheet material having a three-dimensional shape can be easily enhanced, so the partial sheet material can be easily inserted along the longitudinal direction of the long body even when the gap portion is relatively small. be able to.

  As one aspect, a cut line is formed in the thermally expandable fireproof sheet material in a predetermined pattern shape, and the partial sheet material is a three-dimensional member according to the pattern shape by a deformation operation on the partial sheet material. It is preferable to arrange | position to the said clearance gap part in the state pre-formed to shape.

  According to this configuration, it is possible to easily separate the thermally expandable fire resistant sheet material to obtain a partial sheet material by utilizing the cut lines formed in the thermally expandable fire resistant sheet material. In addition, since the partial sheet material is used after being preformed into a three-dimensional shape corresponding to the pattern shape of the score line, the gap portion between the outer surface of each of the elongated members adjacent to each other and the thermally expandable fireproof sheet material More parts of can be filled with relatively simple operations. Therefore, the workability can be improved also from these points.

  In one aspect, the thermally expandable refractory sheet material is preferably non-adhesive.

  According to this configuration, when the partial sheet material is separated from the thermally expandable fire resistant sheet material, the adhesive force does not act, so the resistance at the time of cutting can be suppressed to be small. Moreover, also when inserting a partial sheet material in the gap part between each outer surface of the mutually adjacent elongated body and the thermally expandable fire resistant sheet material, the surface of the partial sheet material (including the exposed surface after cutting) Because there is no stickiness, the resistance at the time of insertion of the partial sheet material can also be reduced. Therefore, the workability can be improved also from these points.

A cutaway perspective view of the fire protection structure according to the first embodiment Cross section of fire protection structure Perspective view of thermally expandable fireproof sheet material Cross section of pre-formed part sheet material Figure showing construction procedure of fire protection structure The perspective view of the thermally expandable fireproof sheet material according to the second embodiment Perspective view of pre-formed part sheet material Sectional drawing which shows another aspect of thermally expandable fireproof sheet material Sectional drawing which shows another aspect of thermally expandable fireproof sheet material Sectional drawing which shows another aspect of thermally expandable fireproof sheet material Sectional drawing which shows another aspect of thermally expandable fireproof sheet material The figure which shows the other aspect of a preforming partial sheet material The figure which shows the other aspect of a preforming partial sheet material The figure which shows the other aspect of a preforming partial sheet material

First Embodiment
A first embodiment of a fire protection structure according to the present invention will be described with reference to the drawings. The fire prevention structure of the present embodiment is a through hole fire protection structure provided in the clearance space S between the through hole 4H formed in the fireproof structure 4 and the plurality of elongated members 6 inserted into the through hole 4H. It is. The fire protection structure of the present embodiment is characterized by the following points. That is, the plurality of elongated bodies 6 are co-rolled using the flexible sheet-like thermally expandable fireproof sheet material 10 having a uniform thickness as a whole. Then, a part of the thermally expandable fire resistant sheet material 10 is formed in the gap portion P surrounded by the respective outer surfaces of the elongated bodies 6 adjacent to each other and the thermally expandable fire resistant sheet material 10 circumscribing them. Partial sheet material 20 is arranged. Thus, in the fire protection structure in which the plurality of elongated bodies 6 are collectively inserted into the through holes 4H of the fireproof structure 4, the workability is improved while securing the fireproof performance. Hereinafter, the fire protection structure of the present embodiment will be described in detail.

  In addition, the term (for example, "parallel", "uniform", etc.) regarding the direction, the dimension, etc. used by the following description is the concept also including the state which has a difference by an error (error of a grade permissible in manufacture). Further, in the drawings referred to in the following description, the scale, upper and lower, right and left dimensional ratio, etc. may be different from the actual product from the viewpoint of easy illustration and easy understanding.

  The fireproof structure 4 to which the fire protection structure is applied is a fireproof and fireproof structure that divides a space in a building into a plurality of room spaces. For example, as shown in FIG. 1, the fireproof structure 4 may be a wall section that divides a plurality of room spaces in the horizontal direction, or a floor (or a ceiling that divides the plurality of room spaces in the vertical direction; ) May be. Moreover, as the fireproof structure 4, for example, reinforced concrete (RC), lightweight cellular concrete (ALC), hollow walls (including gypsum board etc.) and the like can be exemplified. In addition, when the fireproof structure 4 is comprised by the hollow wall, it is good for a sleeve member to be used together. Of course, one having a structure other than these may be used as the refractory structure 4.

  As shown in FIG.1 and FIG.2, the through-hole 4H which penetrates the said fireproof structure 4 in the thickness direction (the example of illustration horizontal direction) is formed in the fireproof structure 4. As shown in FIG. In the present embodiment, a circular through hole 4H is formed. However, without being limited to such a configuration, the specific shape of the through hole 4H may be various shapes such as an elliptical shape, a racetrack shape, and a polygonal shape.

  A plurality of elongated bodies 6 are inserted through the through holes 4H of the refractory structure 4. The elongated body 6 has an elongated structure extending in one direction, such as a linear body, a tubular body, and a strip. As such an elongate body 6, piping for air conditioners can be illustrated, for example. In the present embodiment, the elongated body 6 includes two piping members 61 for refrigerant circulation, one drain pipe 62 for drain water discharge, and one electric cable 63. The “two piping members 61” may be two physically different piping members 61 or may be two different places in a single piping member 61. The piping member 61 has a fluid pipe 61A in which the refrigerant flows and a covering material 61B covering the periphery of the fluid pipe 61A. The fluid pipe 61A is, for example, a tubular member made of metal, and the covering material 61B is a heat insulating material made of, for example, a synthetic resin and packaged in the fluid pipe 61A. The drain pipe 62 is, for example, a tubular member made of synthetic resin. A covering material for covering the drain pipe 62 may also be provided around the drain pipe 62. The electrical cable 63 is configured by providing an insulating coating around the conductor wire. The electrical cable 63 is formed smaller in diameter than the piping member 61 and the drain pipe 62. As shown in FIG. 2, the plurality of elongated bodies 6 are densely arranged in the through hole 4H in a state where the outer surfaces are in contact with each other.

  In the clearance space S between the through hole 4H and the plurality of elongated members 6, a fire protection structure is provided. The clearance space S is a space that spreads in the radial clearance between the inner surface of the through hole 4H and the outer surface of each of the plurality of elongated members 6. The fire protection structure of the present embodiment is mainly configured of a long sheet-like thermally expandable fire resistant sheet material 10, and is realized by using it together with a fire resistant filler 30.

  As shown in FIG. 3, the thermally expandable fire resistant sheet material 10 includes a base material sheet 11 and a thermally expandable refractory material layer 12 laminated on one side of the base material sheet 11. The base sheet 11 is made of, for example, a metal thin film sheet such as aluminum glass cloth, glass cloth, and aluminum warif. The thickness of the base sheet 11 may be, for example, 50 μm to 500 μm. The thermally expandable refractory material layer 12 is formed of a resin composition containing a thermally expandable substrate, an inorganic filler, and a resin component. Examples of the thermally expandable substrate include, for example, thermally expandable graphite, alkali metal silicates, and uncalcined vermiculite powder. As an inorganic filler, various inorganic fillers etc. are illustrated, for example.

  The thermally expandable refractory material layer 12 may have either self-adhesive or non-adhesive properties. As a resin component for forming the self-adhesive thermally expandable refractory material layer 12, for example, an adhesive elastomer containing butyl rubber or the like as a main component is exemplified. Examples of the resin component for forming the non-adhesive thermally expandable refractory material layer 12 include non-adhesive elastomers such as ethylene-propylene-diene rubber and ethylene vinyl acetate copolymer. From the viewpoint of facilitating partial cutting (described in detail later) of the thermally expandable refractory sheet material 10, the thermally expandable refractory material layer 12 (thermally expandable refractory sheet material 10) is preferably non-adhesive . The thickness of the thermally expandable refractory material layer 12 (thermally expandable refractory sheet material 10) may be, for example, 1.5 mm to 10 mm, preferably 2 mm to 6 mm.

  The thermally expandable fire resistant sheet material 10 is configured to have a uniform thickness as a whole. The phrase "having a uniform thickness as a whole" means that the thickness of the thermally expandable fire resistant sheet material 10 is uniform when viewed as a whole. As described later, when the thermally expandable fire resistant sheet material 10 has the recessed groove portion 15, the thickness of the substantial part (protrusions 16 described later) other than the formation portion of the recessed groove portion 15 in the thermally expandable fire resistant sheet material 10 It means that it is uniform regardless of the position in the length direction L and the position in the width direction W. The thermally expandable fireproof sheet material 10 is configured to have flexibility. By "flexible" is meant flexible to the extent that it can be flexed. The flexible heat-expandable fire-resistant sheet material 10 is stored in a rolled-up state, as shown in FIG. In the following, for convenience of explanation, the thermally expandable fireproof sheet material 10 in a state of being stored in a roll may be referred to as "rolled sheet material 10R".

  As shown in the enlarged view of FIG. 3, the thermally expandable fireproof sheet material 10 has a plurality of recessed groove portions 15 on the surface on one side thereof. The recessed groove portion 15 is formed on the surface of the thermally expandable refractory material layer 12 opposite to the base sheet 11. The recessed groove portion 15 is formed so as to be recessed from the surface of the thermally expandable refractory material layer 12 toward the base sheet 11 side. The recessed groove portion 15 is formed to extend along the width direction W of the thermally expandable fireproof sheet material 10. The recessed groove portion 15 is formed so that the cross-sectional shape in a plane orthogonal to the length direction L of the thermally expandable fireproof sheet material 10 exhibits a V shape (in this example, a curved V shape). The plurality of recessed groove portions 15 are formed in parallel to each other at a constant distance in the length direction L of the thermally expandable fireproof sheet material 10. The depth of the recessed groove portion 15 may be, for example, 1/3 to 1 times the thickness of the thermally expandable refractory material layer 12.

  In the thermally expandable fireproof sheet material 10 (thermally expandable refractory material layer 12), ridges 16 of a cross-sectional ridge shape extending along the width direction W between the recessed groove portions 15 adjacent to each other in the length direction L Is defined. When viewed in the width direction W, the “cross-sectional ridge shape” has a cross-sectional shape including a straight portion along the base sheet 11 and a curved portion opposed to the straight portion in the thickness direction T. Means

  The thermally expandable fire resistant sheet material 10 expands in its thickness direction T when heated to, for example, 200 ° C. or more. The expansion coefficient of the thermally expandable fire resistant sheet material 10 may be, for example, 5 times to 40 times.

  In the fire protection structure of the present embodiment, in the clearance space S between the through hole 4H and the plurality of elongated bodies 6, the plurality of elongated bodies 6 are co-wound using the thermally expandable fireproof sheet material 10 (See Figures 1 and 2). As shown in FIG. 5, in the present embodiment, a plurality of rolled expandable sheet materials 10R are drawn out, and the drawn thermally expandable fireproof sheet materials 10 collectively surround a plurality of elongated bodies 6. It is wound around the long body 6. The heat-expandable fire-resistant sheet material 10 is formed in a relatively thin, long sheet shape having flexibility, so that the attachment work to the long body 6 can be easily performed. In addition, since the work of winding the heat-expandable fire-resistant sheet material 10 is completed only once, regardless of the number of the elongated members 6 collectively inserted into the through holes 4H, the workability can be improved. . Such an advantage is particularly significant as the number of co-wound elongated members 6 increases. In addition, the thermally expansible fireproof sheet material 10 is cut | disconnected by predetermined | prescribed length, for example using cutting means, such as scissors and a cutter, either in the timing before winding or after winding.

  One end and the other end of the lengthwise direction L of the heat-expandable refractory sheet material 10 to be wound may be abutted against each other or may be overlapped. In any case, one end and the other end of the thermally expandable fireproof sheet material 10 to be wound are disposed in contact with each other without a gap. Thereafter, the thermally expandable fire resistant sheet material 10 is fixed around the plurality of elongated bodies 6 using a fixing means such as an adhesive means such as an adhesive tape or a restraint means such as an annular wire.

  When a plurality of elongated bodies 6 are co-wound with the thermally expandable fire resistant sheet material 10, a gap portion P is generated between the elongated bodies 6 adjacent to each other and the thermally expandable fire resistant sheet material 10 (FIG. 1 and FIG. 2). The gap portion P is a portion surrounded by the outer surfaces of the elongated members 6 adjacent to each other and the thermally expandable fireproof sheet material 10 circumscribing the outer surfaces. In the present embodiment, a plurality of (in this example, between the two pipe members 61 and one drain pipe 62 having a larger diameter than the electric cable 63 and the thermally expandable fireproof sheet material 10 which is in contact with them, 3) gap portion P occurs. A gap between one of the piping members 61 and the electric cable 63 and a gap between the drain pipe 62 and the electric cable 63 are a gap portion generated between one of the piping members 61 and the drain pipe 62. It is included in P. The plurality of elongated bodies 6 are covered with the thermally expandable fireproof sheet material 10 as a whole, but the respective gap portions P are exposed to the gap portions P. For this reason, the co-winding structure of the present embodiment is excellent in workability as compared with a structure in which each long body 6 is wound individually with the thermally expandable fireproof sheet material 10, but the fire resistance may be inferior. is there.

  In view of such a point, in the fire protection structure of the present embodiment, the partial sheet material 20 formed by separating a part of the roll-like sheet material 10R on which the thermally expandable fire resistant sheet material 10 for co-winding is based. Are arranged in the respective clearances P (see FIGS. 1 and 2). As shown in FIG. 5, the partial sheet material 20 is formed by separating a part of the roll-like sheet material 10R on the delivery end side from the other part of the roll-like sheet material 10R. The partial sheet material 20 is separated along any one of the plurality of recessed groove portions 15 provided in the vicinity of the delivery end of the rolled sheet material 10R using, for example, a cutting means. At that time, as shown in FIG. 5, the partial sheet material 20 includes a plurality of projecting ridges 16 from the roll-like sheet material 10R including a large number of projecting ridges 16 defined between the recessed groove portions 15 adjacent to each other. Separated to include. It is preferable that the partial sheet material 20 be separated from the roll-shaped sheet material 10R so as to include several (for example, about 2 to 5) ridges 16.

  The partial sheet material 20 cut out from the roll-shaped sheet material 10R is folded so that the base material sheet 11 may become inside, as shown in FIG. As a result, the partial sheet material 20 is in a state in which the plurality of protruding portions 16 are folded back to back at the location of the recessed groove portion 15. "Back-to-back" means that the plurality of protrusions 16 are at least partially facing each other. The back of each of the two ridges 16 may be completely opposed (see FIG. 4 (a)), or the back of each of the two or more ridges 16 is incomplete (in a crossing state) You may oppose (refer FIG.4 (b)). In this case, the plurality of ridges 16 are arranged in such a manner that the tops 16a face in different directions. The preformed partial sheet material 20F formed by folding the cut partial sheet material 20 is formed in a columnar shape as a whole (see FIG. 5). And, as a whole, a column-shaped preformed partial sheet material 20F is disposed in the gap portion P, respectively. Thereby, each gap portion P is at least partially filled with the preformed partial sheet material 20F.

  In such a structure, the co-winding of the plurality of elongated members 6 and the partial closing of the gap portion P can be performed only by the thermally expandable fireproof sheet material 10 and the partial sheet material 20 derived from the common roll-like sheet material 10R. It is possible to improve the workability of both operations. In addition, since the preformed partial sheet material 20F is formed in a columnar shape and has a relatively high overall rigidity, it can be easily inserted into the gap portion P along the longitudinal direction of the elongated body 6. Furthermore, since the preformed partial sheet material 20F is formed relatively bulky according to its three-dimensional shape, more part of the gap portion P can be filled. Therefore, the workability can be improved also from these points.

  Further, in the present embodiment, since the thermally expandable refractory material layer 12 (thermally expandable refractory sheet material 10) is non-adhesive, when cutting off the partial sheet material 20 from the roll-shaped sheet material 10R, the cutting means Adhesiveness does not work between. Therefore, the resistance at the time of cutting is advantageously reduced. Further, since the surface (including the exposed surface after cutting) of the partial sheet material 20 is not sticky, the partial sheet material 20 is folded to form a preformed partial sheet material 20F. Furthermore, even when the preformed partial sheet material 20F is inserted into the gap portion P, adhesion does not act between the elongated body 6 and the thermally expandable fireproof sheet material 10 for co-winding, so the resistance at the time of insertion Can be kept small. Therefore, the workability can be improved also from these points.

  After filling the gap portion P with the preformed partial sheet material 20F, fire resistance is provided in the space between the outer surface of the thermally expandable fire resistant sheet material 10 in which the plurality of elongated members 6 are co-wound and the inner surface of the through hole 4H. The filler 30 is filled. Examples of the filler 30 include inorganic fibers such as rock wool, ceramic wool, and glass wool, and cement-based fillers such as mortar and concrete. In the present example, mortar is used as the filler 30. In the structure of the present embodiment, since the outer surface becomes a substantially smooth surface by the thermally expandable fireproof sheet material 10 co-rolling the plurality of elongated bodies 6, the work of backfilling the through holes 4H with the filler 30 Is also easy. Therefore, the workability can be improved also from this point.

  Lastly, in a state of being in contact with both outer surfaces of the fireproof structure 4 so as to conceal the thermally expandable fireproof sheet material 10 and the partial sheet material 20 disposed inside the through hole 4H and the filler 30 as necessary. Install the lid (not shown).

  When a fire occurs in a building, the ambient temperature rises due to the heat of the flame, and the covering material 61B constituting the long body 6 melts and burns, and the clearance space S between the through hole 4H and the long body 6 There is a possibility of further expansion. Even in this case, the thermally expandable fire resistant sheet material 10 and the partial sheet material 20 thermally expand in response to the rise of the ambient temperature, and fill the space generated by the melting and combustion of the covering material 61B (in other words, the gap volume Can compensate for the increase). In the present embodiment, in particular, a plurality of elongated bodies 6 are co-wound and the individual elongated bodies 6 are covered with the thermally expandable fireproof sheet material 10 in an incomplete state in order to improve the workability. The partial sheet material 20 derived from the roll-like sheet material 10R is disposed also in the gap portion P generated by the above. Since this partial sheet material 20 also contributes to filling the space generated by the melting and combustion of the covering material 61B, sufficient fire protection performance is imparted while improving the workability.

Second Embodiment
A second embodiment of the fire protection structure according to the present invention will be described with reference to the drawings. In the present embodiment, the specific configurations of the thermally expandable fireproof sheet material 10 and the partial sheet material 20 (preformed partial sheet material 20F) are different from those of the first embodiment. Hereinafter, the difference between the fire protection structure of the present embodiment and the first embodiment will be mainly described. In addition, about the point which does not specify in particular, it is the same as that of 1st Embodiment, attaches | subjects the same code | symbol, and abbreviate | omits detailed description.

  Unlike the first embodiment, the thermally expandable fireproof sheet material 10 of the present embodiment does not have the recessed groove portion 15. For this reason, the thermally expandable fire resistant sheet material 10 is configured to have a uniform thickness over the entire length direction L. As shown in FIG. 6, in the thermally expandable fireproof sheet material 10, the score lines 18 are formed in a predetermined pattern shape. The score line 18 of this embodiment penetrates the thermally expandable fireproof sheet material 10 in the thickness direction T. In the present embodiment, the plurality of score lines 18 are formed in the thermally expandable fireproof sheet material 10 in an alternating pattern shape. Each score line 18 is formed to extend from the edge 10 e of the thermally expandable fireproof sheet material 10 along the width direction W toward the central portion in the width direction W, and at predetermined intervals along the length direction L The pair of score lines 18 adjacent to each other are formed in opposite directions to each other. That is, in the thermally expandable fire resistant sheet material 10, the score line 18 extending from the both ends 10e of the thermally expandable fire resistant sheet material 10 to the central portion in the width direction W along the width direction W extends along the length direction L They are formed in opposite directions alternately at predetermined intervals.

  In the present embodiment, after the plurality of elongated bodies 6 are co-wound with the thermally expandable fire resistant sheet material 10, the partial sheet material 20 formed by separating a part of the roll sheet material 10R is a pattern of the score line 18 Preform using shape. The formation of the preformed partial sheet material 20F can be performed by making the three-dimensional shape appear by the deformation operation on the partial sheet material 20 in accordance with the pattern shape of the score line 18. In the present embodiment, the partial sheet material 20 having the alternately formed score lines 18 has a plurality of projecting pieces 28 projecting radially as shown in FIG. 7 by the twisting operation to both end portions in the length direction L. The preformed partial sheet material 20F is formed into a three-dimensional shape having the following. The plurality of projecting pieces 28 may be equally distributed in the circumferential direction when viewed from the direction along the central axis, or may be unevenly disposed. In addition, each protrusion 28 may be formed in a flat plate shape, or may be formed so that the whole or a part is bent or curved. In the state in which the partial sheet material 20 (preformed partial sheet material 20F) has a plurality of projecting pieces 28 projecting radially, the thermally expandable fire resistant sheet material which is in contact with the outer surfaces of the adjacent elongated members 6 adjacent to one another And 10 are disposed in a gap portion P surrounded by 10.

  As described above, in the pattern shape of the present embodiment, the score line 18 extending from the both-ends edge 10 e of the thermally expandable fire resistant sheet material 10 to the central portion in the width direction along the width direction W is the length of the thermally expandable fire resistant sheet material 10 It is a staggered pattern shape formed alternately in opposite directions at predetermined intervals along the direction L. Then, in a state in which the partial sheet material 20 (preformed partial sheet material 20F) is preformed into a three-dimensional shape having a plurality of projecting pieces 28 radially projecting by the twisting operation to both end portions in the length direction L, the gap portion It is arranged in P.

  Since the preformed partial sheet material 20F of the present embodiment has the plurality of projecting pieces 28 projecting radially, it is easy to form the whole in a bulky manner. Therefore, even when the gap portion P is relatively large, more portions of the large gap portion P can be easily filled with a small amount of material. Also when forming the preformed partial sheet material 20F, a part of the thermally expandable fire resistant sheet material 10 (roll-like sheet material 10R) in which the cut lines 18 of the staggered pattern shape are formed is separated and both ends in the length direction L It is very simple as it only requires twisting the parts. Therefore, also in this embodiment, it is possible to realize a fire protection structure that is excellent in workability and has sufficient fire protection performance.

Other Embodiments
(1) In the first embodiment, the thermally expandable refractory material layer 12 of the thermally expandable refractory sheet material 10 includes the groove portion 15 having a V-shaped cross section and the ridge portion 16 having a wedge shape in a longitudinal direction. A configuration in which L is continuously provided has been described as an example. However, without being limited to such a configuration, for example, as shown in FIG. 8, the thermally expandable refractory material layer 12 of the thermally expandable refractory sheet material 10 has a cross-sectional trapezoidal shape and a recessed groove portion 15 having an inverted trapezoidal shape. And may be provided. Further, for example, as shown in FIG. 9, the recessed groove portion 15 may be formed to have a depth equivalent to the thickness of the thermally expandable refractory material layer 12, in this case, the projected streaks adjacent in the length direction L The portions 16 are laminated on the base sheet 11 in a discontinuous state separated from each other. For example, as shown in FIG. 10, the thermally expandable refractory material layer 12 of the thermally expandable refractory sheet material 10 may be formed to have a brush-like surface shape. Furthermore, for example, as shown in FIG. 11, the thermally expandable refractory material layer 12 of the thermally expandable refractory sheet material 10 extends in the width direction W without penetrating the thermally expandable refractory material layer 12 in the thickness direction T. It may be formed to have a half cut line 19 (a non-piercing cut line) extending in a vertical direction.

(2) In the first embodiment, the ridge portion 16 provided on the thermally expandable refractory material layer 12 of the thermally expandable refractory sheet material 10 extends over the entire width direction W of the thermally expandable refractory sheet material 10. The configuration formed to extend continuously has been described as an example. However, without being limited to such a configuration, in the width direction W of the thermally expandable fireproof sheet material 10, a plurality of projecting streaks 16 may be distributed with a gap therebetween.

(3) In the first embodiment, the partial sheet material 20 separated from the rolled sheet material 10R so as to include the plurality of protrusions 16 is folded by the protrusions 16 back-to-back and preformed The configuration for forming the partial sheet material 20F has been described as an example. However, the present invention is not limited to such a configuration, and for example, the pre-formed partial sheet material 20F may be formed by folding the ridges 16 in a face-to-face manner. In addition, the partial sheet material 20 may be separated from the roll-shaped sheet material 10R so as to include only one ridge portion 16. In this case, the partial sheet material 20 including the one protruding portion 16 is disposed in the gap portion P as it is.

(4) In the second embodiment, the thermally expandable fireproof sheet material 10 has been described as an example of the configuration having the score lines 18 formed in the alternate pattern shape. However, without being limited to such a configuration, for example, as shown in FIG. 12, the heat-expandable refractory sheet material 10 may have a score line 18 formed in a parallel pattern shape. A plurality of cut lines 18 having a parallel pattern shape are formed to extend along the width direction W at predetermined intervals along the length direction L at the central portion excluding both ends in the width direction W. In this case, for example, the end portions of the partial sheet material 20 in the width direction W are moved close to each other, and a plurality of V-shaped (or arc-shaped) protruding on both sides with respect to the extension surface of the partial sheet material 20 The three-dimensional preformed partial sheet material 20F having the projecting pieces 28A may be formed. For example, as shown in FIG. 13, the partial sheet material 20 derived from the thermally expandable fireproof sheet material 10 (see FIG. 11) having the half cut line 19 is subjected to rounding operation with the base sheet 11 side facing inside. Alternatively, a three-dimensional preformed partial sheet material 20F having a ridge portion 29 on the outer surface may be formed. Other than these, the combination of the pattern shape of the score line 18 (including the half cut line 19) and the three-dimensional shape of the preformed partial sheet material 20F according to it may be designed arbitrarily.

(5) In each of the above-described embodiments, the configuration in which the recessed groove portion 15 and the score line 18 are formed in the thermally expandable fireproof sheet material 10 has been described as an example. However, without being limited to such a configuration, the thermally expandable fire resistant sheet material 10 may be a flat sheet of a certain thickness which does not have the recessed groove portion 15 or the score line 18. In this case, for example, as shown in FIG. 14, the partial sheet material 20 separated from the roll sheet material 10R by a predetermined length is subjected to a rounding operation so as to be rolled into a roll, and a cylindrical preformed partial sheet material 20F You may form

(6) In each of the above embodiments, the configuration in which the thermally expandable refractory material layer 12 (thermally expandable refractory sheet material 10) is non-adhesive is described as an example. However, without being limited to such a configuration, the thermally expandable refractory material layer 12 (thermally expandable refractory sheet material 10) may be adhesive.

(7) In each of the above-described embodiments, the configuration in which the partial sheet material 20 is disposed in the generated gap portion P after co-winding the plurality of elongated bodies 6 with the thermally expandable fireproof sheet material 10 has been described as an example. However, without being limited to such a configuration, for example, after disposing the partial sheet material 20 in advance in a portion where the gap portion P is to be generated, the plurality of elongated bodies 6 are co-processed by the thermally expandable fireproof sheet material 10 You may wind it.

(8) In each of the above embodiments, the configuration in which the elongated body 6 is the piping for the air conditioner (specifically, the piping member 61, the drain pipe 62, and the electric cable 63) has been described as an example. However, without being limited to such a configuration, one or more of the piping member 61, the drain pipe 62, and the electric cable 63 may not be included as the plurality of elongated bodies 6. The long body 6 may be, for example, a protective pipe for the electric cable 63 or the like, or may be piping for water supply and drainage.

  The configurations disclosed in the above-described embodiments (including the above-described embodiments and the other embodiments; the same applies to the following) are applied in combination with the configurations disclosed in the other embodiments, as long as no contradiction arises. It is also possible.

  With regard to the other configurations, it is to be understood that the embodiments disclosed herein are illustrative in all respects, and the scope of the present invention is not limited by them. Those skilled in the art will easily understand that appropriate modifications can be made without departing from the spirit of the present invention. Therefore, other embodiments modified within the scope of the present invention are naturally included in the scope of the present invention.

  The present invention can be applied to, for example, a fire protection structure provided in a clearance space between a through hole formed in a fireproof structure and a plurality of elongated members inserted through the through hole.

Reference Signs List 4 fire resistant structure 4H through hole 6 elongated body 10 thermally expandable fire resistant sheet material 10R roll shaped sheet material 10 e end edge 15 recessed groove portion 16 ridge 18 cut line 19 half cut line 20 partial sheet material 20F preformed partial sheet material 28 projecting piece 28A projecting piece 29 ridge portion S gap space P gap portion L length direction W width direction

Claims (3)

A fire protection structure provided in a clearance space between a through hole formed in a fireproof structure and a plurality of elongated members inserted into the through hole,
A plurality of the elongated bodies are co-wound using a flexible sheet-like thermally expandable fireproof sheet material having a uniform thickness as a whole;
Partial sheet material formed by separating a part of the thermally expandable fire resistant sheet material in a gap portion surrounded by the respective outer surfaces of the elongated bodies adjacent to each other and the thermally expandable fire resistant sheet material circumscribed to them Is arranged ,
The thermally expandable fireproof sheet material has a plurality of recessed groove portions formed in parallel with each other and extending in the width direction on the surface on one side thereof,
The partial sheet material is separated from the thermally expandable fire resistant sheet material so as to include a plurality of projecting ridges defined between adjacent ones of the recessed groove portions in the thermally expandable fire resistant sheet material, The fire protection structure in which the protruding portion is disposed in the gap portion in a state of being folded back-to-back at the location of the recessed groove portion . A fire protection structure provided in a clearance space between a through hole formed in a fireproof structure and a plurality of elongated members inserted into the through hole,
A plurality of the elongated bodies are co-wound using a flexible sheet-like thermally expandable fireproof sheet material having a uniform thickness as a whole;
Partial sheet material formed by separating a part of the thermally expandable fire resistant sheet material in a gap portion surrounded by the respective outer surfaces of the elongated bodies adjacent to each other and the thermally expandable fire resistant sheet material circumscribed to them Is arranged ,
In the heat-expandable refractory sheet material, cut lines are formed in a predetermined pattern shape,
The fire protection structure in which the partial sheet material is disposed in the gap portion in a state of being preformed into a three-dimensional shape according to the pattern shape by a deformation operation on the partial sheet material . The thermally expandable fireproof sheet material, fire measures structure according to claim 1 or 2, which is non-tacky.

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