Fire resistant structure for section penetration part and penetration part fire resistant construction method

Abstract

To provide: a fire resistant structure for a section penetration part which facilitates construction, improves the degree of freedom for the thickness or the kind of an applicable section part and is capable oof maintaining a fire resistant sheet at an appropriate position; and a penetration part fire resistant construction method using the fire resistant structure for the section penetration part.SOLUTION: A fire resistant structure 1 for a section penetration part comprises: a penetration hole 4 which is formed in a section part 3; a sleeve 5 including a cylindrical part 51, which is inserted into the penetration hole 4, and claw parts 52 which are formed extending in a diameter expansion direction from one end of the cylindrical part 51 in an axial direction and abutted to one face of the section part 3; a long body 2 which is inserted into the cylindrical part 51; a filler 6 which fills a gap between the sleeve 5 and the long body 2; and a fire resistant sheet 7 which is wound around the long body 2. The fire resistant sheet 7 includes: a winding part 71, which is wound around the long body 2; and lock parts 72 which are locked to the claw parts 52, respectively.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fireproof structure for a compartment penetration part that penetrates a fire compartment, and a fireproof construction method for constructing the fireproof structure for the compartment penetration part. [Background technology]

[0002] Conventionally, a compartment penetration part is provided when it is necessary to pass a flammable long object such as a cable through a fire compartment. The compartment penetration part is required to have a fireproof structure with fire prevention measures to prevent the fire from spreading to other compartments in the event of a fire breaking out in one compartment.

[0003] As a method for making such a partition penetration part fireproof, for example, a method is known in which the gap between the elongated body and the penetration hole is filled with an irregular filler such as fireproof putty or a fireproof pack with fireproof putty packed inside a bag. When filling such an irregular filler, a steel sleeve, for example, is disposed between the inside of the penetration hole of the partition part and the elongated body, so that the filled filler is reliably fixed in the penetration hole and the filler is prevented from leaking into the hollow part provided in the partition part of the wall material or the like (for example, see Patent Document 1).

[0004] Also proposed is a fireproof structure in which a fireproof sheet having a thermally expandable material is wrapped around a long body to prevent the spread of fire along the covering of the long body that penetrates the center of the amorphous filler (see, for example, Patent Documents 2 and 3). These fireproof sheets are fastened to the walls that constitute the partition with fastening members such as staples and screws so that they do not come off the partition. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-070199 A [Patent Document 2] JP 2006-149079 A [Patent Document 3] JP 2023-006147 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, when fixing a fireproof sheet to a partition with the above-mentioned fastening members, the fastening members are hammered into the wall material forming the partition with a tool, which is time-consuming to install. In addition, the fastening members also require fireproof certification, which requires strict management of the fastening members during installation, and depending on the type and thickness of the wall material forming the partition, it may be difficult to make the fastening members comply with the certification.

[0007] On the other hand, if the fire-resistant sheet is not fixed to the partition, when fixing equipment such as an intercom, lighting, or external outlet to which a long object such as a cable is wired through the through hole to the partition, the long object may be pushed in by external force applied to the long object, causing the fire-resistant sheet to separate from the partition, which may reduce the fire-resistant performance.

[0008] Therefore, the present invention aims to provide a fire-resistant structure for a compartment penetration part that is easy to install, has a high degree of freedom in the thickness and type of the applicable compartment part, and can maintain the fire-resistant sheet in an appropriate position, and a fire-resistant installation method for a penetration part using the fire-resistant structure for a compartment penetration part. [Means for solving the problem]

[0009] The fireproof structure of a first compartment penetration part of the present invention comprises a sleeve having a through hole formed in the compartment, a cylindrical part inserted into the through hole, and a claw part extending from one axial end of the cylindrical part in a radially expanding direction and abutting one side of the compartment, an elongated body inserted into the cylindrical part, a filler filled between the sleeve and the elongated body, and a fireproof sheet wrapped around the elongated body, wherein the fireproof sheet has a wrapping part wrapped around the elongated body and a locking part that locks onto the claw part.

[0010] The fireproof structure of the second compartment penetration part of the present invention has, in addition to the features of the fireproof structure of the first compartment penetration part, two or more of the claw portions are formed, the fireproof sheet is provided with two or more locking portions, the two or more locking portions are formed by bending in directions away from each other from one end of the winding part when the winding part is wound around the elongated body, each of the locking portions has a slit into which the claw portion can be inserted, the fireproof sheet is formed by making cuts in a rectangular flat sheet, the cuts have one or more first cuts separating the two or more locking portions, and a second cut formed in a straight line in a direction perpendicular to the first cut and provided at the boundary between the winding part and the locking portion, and a part of the second cut is interrupted to connect the winding part and the locking portion.

[0011] The fire-resistant structure of the third compartment penetration part of the present invention is characterized in that, in addition to the features of the fire-resistant structure of the second compartment penetration part, the axial length of the wrapping part of the fire-resistant sheet is longer than the axial length that needs to be wrapped around the elongated body to ensure the fire resistance of the compartment penetration part.

[0012] The first fire-resistant construction method of the present invention is a fire-resistant construction method of a penetration part for constructing a fire-resistant structure for any one of the first to third compartment penetration parts, and is characterized in that it includes the following steps: a drilling step for forming the through hole in the compartment part; a sleeve insertion step for inserting the cylindrical portion of the sleeve into the through hole; a long body insertion step for inserting the elongated body into the cylindrical portion of the sleeve; a filler filling step for filling the space between the sleeve and the long body with the filler; a locking step for locking the locking portion of the fire-resistant sheet with the claw portion of the sleeve; a wrapping step for wrapping and fixing the wrapping portion of the fire-resistant sheet around the long body; and an equipment installation step for wiring the long body to a specified device on the side opposite to the side where the locking portion is locked to the claw portion, across the compartment, and fixing the specified device to the compartment part.

[0013] The second fireproof construction method for a penetration part of the present invention has, in addition to the features of the first fireproof construction method for a penetration part, the cylindrical part is elastic, has a slit along its entire axial length and overlaps in part to form a diameter larger than the through hole, and the sleeve insertion process is characterized in that the cylindrical part is reduced in diameter and inserted into the through hole and pushed in until the claw part abuts against one side of the partition part. Effect of the Invention

[0014] According to the fireproof structure of the first compartment penetration part of the present invention, since the sleeve has a claw part, when the sleeve is inserted into the through hole, the claw part abuts against one side of the compartment part, so that the sleeve can be installed in an appropriate position, and the claw part can prevent the sleeve from falling off. Since the fireproof sheet has a winding part that wraps around the elongated body inserted into the cylindrical part of the sleeve and a locking part that locks onto the claw part, the fireproof sheet can be locked to one side of the compartment part without using a fixing member such as a screw or a staple. This prevents the fireproof sheet from shifting position along the elongated body, so that the fireproof sheet can be prevented from decreasing in fire resistance of the compartment penetration part. Since the fireproof sheet is fixed using the claw part provided for positioning the sleeve and preventing it from falling off, the number of parts is not increased. Since the prevention of the fireproof sheet from shifting position is realized without using a fixing member such as a screw or a staple, no tools are required for the work of installing the fireproof sheet, and the workability can be improved. Furthermore, since no screws or the like are used, it can be adapted regardless of the thickness or material of the compartment part, and the freedom of the location to which the fireproof structure of the compartment penetration part of the present invention can be applied can be increased.

[0015] According to the second fireproof structure of the compartment penetration part of the present invention, in addition to the effect of the first fireproof structure of the compartment penetration part described above, since two or more claws are formed, the sleeve can be reliably installed at an appropriate position. The fireproof sheet is provided with two or more locking parts, and each locking part is fixed by forming a slit into which the claw can be inserted, so that the fireproof sheet can be reliably locked. The fireproof sheet has a cut, and the cut has one or more first cuts that separate the two or more locking parts, and a second cut that is formed linearly in a direction perpendicular to the first cut and is provided at the boundary between the winding part and the locking part, and a part of the second cut is interrupted to connect the winding part and the locking part, so that when the winding part is rolled into a cylindrical shape, the locking parts can be easily folded in a direction away from each other. Since the fireproof sheet can be formed by simply providing cuts in a rectangular flat sheet, the fireproof sheet itself has a simple shape and can be manufactured relatively easily.

[0016] According to the fire-resistant structure of the third compartment penetration part of the present invention, in addition to the effect of the fire-resistant structure of the second compartment penetration part described above, the axial length of the wrapped portion of the fire-resistant sheet is longer than the length necessary to ensure fire resistance. Therefore, even if the length between the two claw portions becomes longer, for example, when the diameter of the through hole is formed slightly longer, two or more engagement portions can be engaged with the respective claw portions by widening one end of the wrapped portion of the fire-resistant sheet. In such a case, even if one end of the wrapped portion widens slightly, the length necessary to ensure fire resistance in the axial direction of the wrapped portion can be maintained.

[0017] According to the first penetration fireproofing construction method of the present invention, the fireproof sheet is held on one side of the partition by the locking portion of the fireproof sheet being locked with the claw portion at one end of the sleeve inserted in the sleeve insertion process, making construction easier than when screws or staples are driven into the partition. Furthermore, even if an external force is applied to the elongated body when fixing a specific device to the partition in the equipment installation process, the fireproof sheet is prevented from moving away from the appropriate position, so the equipment installation process can be easily performed without worrying about the position of the fireproof sheet.

[0018] According to the second fireproof construction method for a penetration part of the present invention, in addition to the effects of the first fireproof construction method for a penetration part, the cylindrical part is elastic, has a slit along the entire axial length with some parts overlapping to form a diameter larger than the through hole, and the sleeve insertion process reduces the diameter of the cylindrical part to insert it into the through hole, so that the elastic stress allows the cylindrical part to be securely attached to the through hole, and by pushing the sleeve until the claw part abuts one side of the partition part, the sleeve can be securely installed in the appropriate position, and the sleeve can be prevented from shifting or falling off, and the fireproof sheet that engages with the claw part of the sleeve can be held in the appropriate position. [Brief description of the drawings]

[0019] [Figure 1] FIG. 4 is a cross-sectional view illustrating the overall configuration of the fire-resistant structure of the compartment penetration portion. [Diagram 2] FIG. 4 is a perspective view illustrating the external configuration of a sleeve. [Diagram 3] FIG. 2 is a front view illustrating the configuration of the fireproof sheet before installation. [Figure 4] FIG. 4 is a perspective view illustrating a state in which a fireproof sheet is fixed to a long body. [Diagram 5] A cross-sectional view explaining the overall configuration of the fire-resistant structure of a compartment penetration part when the diameter of the penetration hole is slightly wider. [Figure 6] FIG. 4 is a cross-sectional view illustrating a sleeve insertion step in the fireproofing construction method for a penetration part. [Figure 7] 4 is a cross-sectional view illustrating a long body inserting step and a filler filling step in the fireproofing construction method for a penetration part. FIG. [Figure 8]FIG. 4 is a cross-sectional view illustrating a locking step in the fireproofing method for a penetration portion. [Figure 9] FIG. 4 is a perspective view illustrating a winding process in the fireproofing method for a penetration part. [Figure 10] FIG. 13 is a perspective view illustrating the external configuration of a modified sleeve having three claw portions. [Figure 11] FIG. 13 is a front view illustrating the configuration of a fireproof sheet before installation in a modified example in which three locking portions are formed. [Figure 12] FIG. 13 is a perspective view illustrating a state in which a fireproof sheet having three locking portions formed thereon is fixed to a long body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of a fireproof structure 1 for a compartment penetration part and a fireproof construction method for a penetration part of the present invention will be described with reference to the drawings. The fireproof structure 1 for a compartment penetration part is a structure formed in a fireproof compartment part through which a long body 2 needs to pass. As shown in Fig. 1, the fireproof structure 1 for a compartment penetration part includes a penetration hole 4 formed in a compartment part 3 which is a partition separating two spaces, a sleeve 5 inserted into the penetration hole 4, a long body 2 inserted into the sleeve 5, a filler 6 filled between the sleeve 5 and the long body 2, and a fireproof sheet 7 wrapped around the long body 2.

[0021] The compartment 3 is a partition that separates two spaces, and in this embodiment, it is formed of a fire-resistant exterior wall material made of concrete. The compartment 3 is not limited to an exterior wall material as long as it has a predetermined fire resistance that can prevent the spread of fire between the two separated spaces, and may be, for example, a calcium silicate board, a gypsum board, an ALC board, or a RC wall. The compartment 3 is not limited to an exterior wall, and the fire-resistant structure 1 of the compartment penetration part of the present invention may be a wall or floor that serves as a fire compartment, or may be a partition that separates, for example, the eaves, the attic, the ceiling pocket, etc. The compartment 3 may be provided with a hollow part. When the filling material 6 is filled, the sleeve 5 serves as a base, so that the filling material 6 can be prevented from falling into the hollow part, and reliable fire resistance can be maintained. The through hole 4 is a circular hole drilled in the compartment 3.

[0022] As shown in Figs. 1 and 2, the sleeve 5 has a cylindrical portion 51 inserted into the through hole 4 and a claw portion 52 formed at one axial end of the cylindrical portion 51. The sleeve 5 is formed by processing a thin steel plate, and the cylindrical portion 51 and the claw portion 52 are integrally formed. The cylindrical portion 51 is formed by rolling a thin steel plate into a cylindrical shape, and a slit 53 is provided over the entire axial length of the cylindrical portion 51. The cylindrical portion 51 has elasticity, and the slit 53 of the cylindrical portion 51 is formed so that the thin plate overlaps twice. When the outer circumferential surface of the cylindrical portion 51 is pressed in the diameter reducing direction, the overlap width of the slit 53 expands due to elastic deformation, and the cylindrical portion 51 is reduced in diameter. The diameter of the cylindrical portion 51 in a state where no external force is applied is slightly larger than the diameter of the through hole 4 drilled in the partition portion 3, and when inserting the cylindrical portion 51 into the through hole 4, a force is applied to reduce the diameter of the cylindrical portion 51 while inserting it into the through hole 4, and the cylindrical portion 51 is held in close contact with the inner circumference of the through hole 4 by the elastic stress of the cylindrical portion 51. The axial length of the cylindrical portion 51 is equal to the thickness of the partition portion 3, and the cylindrical portion 51 is fixed in contact with the entire inner circumference of the through hole 4. The cylindrical portion 51 may be formed in a cylindrical shape without a break 53, and the diameter of the cylindrical portion 51 may be formed to be approximately equal to the inner circumference diameter of the through hole 4.

[0023] The claw portion 52 is formed to extend from one end of the cylindrical portion 51 in the axial direction toward the radial expansion direction of the cylindrical portion 51. Two claw portions 52 are formed, and are formed to protrude from one end of the cylindrical portion 51 in directions away from each other with the cylindrical portion 51 in between. Although two claw portions 52 are provided in this embodiment, three or more claw portions 52 may be provided at one end of the cylindrical portion 51. The claw portions 52 are formed so that the width of the base end side connected to one end of the cylindrical portion 51 is narrow and the width of the tip end side is wide, making it easy to bend and unbend the claw portions 52 relative to the cylindrical portion 51.

[0024] In this embodiment, the long body 2 is one or more cables, such as a power cable or a communication cable that transmits power or signals through the partition 3 to a predetermined device 8 provided on the opposite side. Examples of the predetermined device 8 include, but are not limited to, an intercom, an external light, an outdoor outlet, a security camera, etc., which are fixed to the exterior wall material that forms the partition 3, and the type of device 8 is not limited as long as it is a device that needs to transmit power or signals through the long body 2. Furthermore, the fireproof structure 1 for a partition penetration part of the present invention is not limited to one having a predetermined device 8 on one side of the partition 3, so long as it is necessary to pass the long body 2 through the partition 3.

[0025] The filler 6 is a lightweight fireproof putty that can be filled into the through hole 4. The filler 6 is formed by mixing, for example, a resin such as liquid rubber or oil with an inorganic filler, a flame retardant, a lightweight material, etc., and prevents the spread of fire through the through hole 4. The filler 6 is not limited to the above, and may be, for example, mortar as long as it can be filled into the through hole 4.

[0026] As shown in Figs. 3 and 4, the fireproof sheet 7 has a winding portion 71 that is wound around the elongated body 2 and two locking portions 72 that are locked to the claw portions 52 of the sleeve 5. The fireproof sheet 7 is formed by making cuts in a rectangular flat sheet and folding it into a predetermined three-dimensional shape. As shown in Fig. 3, when the fireproof sheet 7 is arranged with the winding portion 71 on the upper side and the two locking portions 72 on the lower side, a first cut 73 is formed from the center of the lower side upward to near the center of the fireproof sheet 7, forming two locking portions 72 that are separated from each other. Then, a second cut 74 perpendicular to the first cut 73 is formed in the left-right direction from the upper end of the first cut 73, separating the winding portion 71 from the two locking portions 72. The second cut 74 is interrupted at a connecting portion 75 in the center of each of the two locking portions 72 in the left-right direction, connecting the winding portion 71 to each of the locking portions 72. A slit 76 is formed in the center of each of the two locking portions 72 in the left-right direction.

[0027] 1 and 4, the fireproof sheet 7 formed in this manner can be made into a state in which it can be engaged with the claw portions 52 of the sleeve 5 by rolling the winding portion 71 into a roll, bending the connection portions 75 formed at the bases of the two locking portions 72 toward the winding portion 71, and bending the two locking portions 72 in directions away from each other. The winding portion 71 is wound around the elongated body 2, and in order to maintain the wound state, for example, a cable tie 9 is wound around the outer periphery of the winding portion 71.

[0028] Although not shown, the fireproof sheet 7 is formed, for example, by laminating a thermal expansion material on a base material. The base material is, for example, a metal sheet such as aluminum or a metal glass cloth composite sheet that is bendable and has a moderate shape retention. The thermal expansion material is formed of a thermally expandable material, a shape retention material, an inorganic filler, a base resin, etc. The thermally expandable material is, for example, thermally expandable graphite, vermiculite, and thermally expandable microcapsules. The material constituting the thermal expansion material is not particularly limited. The fireproof sheet 7 expands when heated, and increases in volume to seal the areas burned by the flames and heat of a fire. In addition, the fireproof sheet 7 may be provided with an adhesive layer on the surface of the fireproof sheet 7 that contacts the long body 2 to stably fix the fireproof sheet 7 to the long body 2 and to improve the ease of wrapping the fireproof sheet 7 around the long body 2, thereby providing adhesiveness.

[0029] The fireproof sheet 7 has a width that is greater than or equal to the length that can cover the elongated body 2 one or more times when wrapped around the elongated body 2, and the axial length of the wrapping portion 71, which is the longitudinal direction of the elongated body 2 when wrapped around the elongated body 2, is formed to be longer than the length required to prevent the spread of fire through the covering of the elongated body 2. For example, when 30 mm is required in the longitudinal direction of the elongated body 2 to ensure sufficient fire resistance, the axial length of the wrapping portion 71 is formed to be, for example, 35 mm. In addition, the distance between each of the slits 76 of the two locking portions 72 is formed to be approximately equal to or slightly shorter than the diameter of the cylindrical portion 51 of the sleeve 5, and when the claw portion 52 is inserted into each of the slits 76, the two locking portions 72 abut against one surface of the partition portion 3 without slack, so that the wrapping portion 71 can be wrapped around the elongated body 2 at an appropriate position. In the case where the length between the two claw portions 52 of the sleeve 5 becomes slightly longer, such as when the diameter of the through hole 4 is formed slightly longer, when the locking portion 72 is locked to the claw portion 52, as shown in Figure 5, the two locking portions 72 of the fire-resistant sheet 7 spread apart from each other, and the end of the winding portion 71 to which the locking portion 72 is connected spreads slightly. However, since the axial length of the winding portion 71 is longer than the length necessary to ensure fire resistance, the winding portion 71 can be wrapped around the elongated body 2 with a length α sufficient to ensure fire resistance.

[0030] In this embodiment, the sleeve 5 has two claws 52, but as shown in FIG. 10, three or more claws 52 may be provided at one end of the cylindrical portion 51. Also, as shown in FIG. 11 and FIG. 12, three or more locking portions 72 may be formed on the fireproof sheet 7. In this case, when the fireproof sheet 7 has the winding portion 71 on the upper side and three or more locking portions 72 on the lower side as shown in FIG. 11, first cuts 73 are formed upward from a position that divides the lower side into three or more equal parts to the vicinity of the center of the fireproof sheet 7, and three or more locking portions 72 separated from each other are formed. Then, second cuts 74 perpendicular to the first cuts 73 are formed in the left-right direction from the upper end of the first cuts 73, separating the winding portion 71 from the three or more locking portions 72. The second cut 74 has a connection portion 75 formed at the center in the left-right direction of each of the three or more engagement portions 72, where the cut is interrupted, connecting the winding portion 71 to each of the engagement portions 72, and a slit 76 is formed in the center in the left-right direction of each of the three engagement portions 72.

[0031] 12, the fireproof sheet 7 having three or more locking portions 72 can be made lockable to three or more claw portions 52 of the sleeve 5 by rolling the winding portion 71 into a roll, bending the connection portions 75 formed at the bases of the three or more locking portions 72 toward the winding portion 71, and bending the three or more locking portions 72 in directions away from each other. By locking three or more locking portions 72 to three or more claw portions 52, respectively, the fireproof sheet 7 and the sleeve 5 are more strongly fixed together, and the fireproof sheet 7 can be more reliably prevented from shifting position along the elongated body 2.

[0032] In the fireproof construction method for constructing the fireproof structure 1 of the compartment penetration part of this embodiment, first, a drilling step is performed in which a circular through hole 4 is drilled in the fireproof exterior wall material, which is the compartment 3, with a core drill tool (not shown). After the drilling step is completed, a sleeve insertion step is performed in which a cylindrical portion 51 of a sleeve 5 is inserted into the through hole 4 formed in the drilling step, as shown in Fig. 6. In the sleeve insertion step, an external force is applied to the cylindrical portion 51 so as to expand the width of the overlapping portion of the slit 53 of the cylindrical portion 51, thereby reducing the diameter of the cylindrical portion 51 to a size that can be inserted into the through hole 4, and the cylindrical portion 51 is inserted into the through hole 4 until the claw portion 52 abuts against the compartment 3. In this manner, the cylindrical portion 51 can be securely fitted into the through hole 4 due to elastic stress, and by pushing the sleeve 5 until the claw portion 52 abuts one side of the partition portion 3, the sleeve 5 can be securely installed in the appropriate position while preventing the sleeve 5 from shifting or falling off, and the fire-resistant sheet 7 engaged with the claw portion 52 of the sleeve 5 can be held in the appropriate position.

[0033] 7, a long body inserting step is performed in which the long body 2 is inserted into the cylindrical portion 51 of the sleeve 5. Then, a filler filling step is performed in which the filler 6 is filled between the sleeve 5 and the long body 2 while the long body 2 is held in the center of the sleeve 5.

[0034] Next, as shown in Figs. 8 and 9, a locking step is performed in which the locking portion 72 of the fireproof sheet 7 is locked to the claw portion 52 of the sleeve 5. In the locking step, the claw portion 52 of the sleeve 5 is first raised slightly to be positioned so that the claw portion 52 can be easily inserted into the slit 76 of the locking portion 72. Then, while deforming the wrapped portion 71 of the rectangular flat heat-resistant sheet into a cylindrical shape, the two locking portions 72 are pulled in a direction away from each other, and the claw portions 52 are inserted into the slit 76 of each locking portion 72. In the locking step, the locking portion 72 is simply locked to the claw portion 52 without using screws or staples, so that the work can be easily performed without the need to prepare screws or tools. After that, a winding step is performed in which the wrapped portion 71 is wound around the elongated body 2 and fixed. In the winding step, the winding portion 71 is wound around the elongated body 2 , and the cable tie 9 is further wound around the outer periphery of the winding portion 71 to fix the winding portion 71 to the elongated body 2 .

[0035] 1, a specific device 8, such as an intercom, is connected to the long body 2 on the side opposite to the side where the locking portion 72 is locked to the claw portion 52 across the partition portion 3, and an equipment installation process is performed to fix the specific device 8 to the partition portion 3, completing the fireproofing of the penetration portion. In the equipment installation process, the specific device 8 connected to the long body 2 is pressed against the partition portion 3, and a force is applied to the long body 2 in a direction from the device 8 side toward the side where the locking portion 72 is locked to the claw portion 52, but because the locking portion 72 of the fireproof sheet 7 is locked to the claw portion 52, it does not come off the partition portion 3, and the fireproof structure 1 of the partition penetration portion can maintain appropriate fire resistance.

[0036] It goes without saying that the embodiment of the present invention is not limited to the above-mentioned embodiment, and can be modified as appropriate without departing from the scope of the concept of the present invention.

[0037] <First feature> A first feature of the fireproof structure of the partition penetration part is that it comprises a sleeve having a through hole formed in the partition part, a cylindrical part inserted into the through hole, and a claw part extending from one axial end of the cylindrical part in a radially expanding direction and abutting one side of the partition part, an elongated body inserted into the cylindrical part, a filler filled between the sleeve and the elongated body, and a fireproof sheet wrapped around the elongated body, the fireproof sheet having a wrapping part wrapped around the elongated body and a locking part that locks onto the claw part.

[0038] According to this, since the sleeve has a claw portion, when the sleeve is inserted into the through hole, the claw portion abuts against one side of the partition portion, so that the sleeve can be installed in an appropriate position, and the claw portion can prevent the sleeve from falling off. Since the fireproof sheet has a winding portion that wraps around the elongated body inserted into the cylindrical portion of the sleeve and a locking portion that locks to the claw portion, the fireproof sheet can be locked to one side of the partition portion without using a fixing member such as a screw or staple. This prevents the fireproof sheet from shifting position along the elongated body, so that the fireproof sheet can be prevented from decreasing in fire resistance of the partition penetration portion. Since the fireproof sheet is fixed using the claw portion provided for positioning the sleeve and preventing it from falling off, the number of parts does not increase. Since the prevention of the fireproof sheet from shifting position is realized without using a fixing member such as a screw or staple, no tools are required for the work of installing the fireproof sheet, and the workability can be improved. Furthermore, since no screws or the like are used, it can be adapted regardless of the thickness or material of the partition portion, and the degree of freedom of the location to which the fireproof structure of the partition penetration portion of the present invention can be applied can be increased.

[0039] <Second feature> A second feature of the fireproof structure of the compartment penetration part is, in addition to the first feature, that two or more of the claw portions are formed, the fireproof sheet is provided with two or more locking portions, the two or more locking portions are formed by bending in directions away from each other from one end of the winding part when the winding part is wound around the elongated body, and each of the locking portions has a slit into which the claw portion can be inserted, the fireproof sheet is formed by making cuts in a rectangular flat sheet, the cuts have one or more first cuts separating the two or more locking portions, and a second cut formed in a straight line in a direction perpendicular to the first cut and provided at the boundary between the winding part and the locking portion, and a part of the second cut is interrupted to connect the winding part and the locking portion.

[0040] According to this, in addition to the effect of the first feature described above, since two or more claws are formed, the sleeve can be reliably installed at an appropriate position. The fireproof sheet is provided with two or more locking parts, and each locking part is fixed by forming a slit into which the claw can be inserted, so that the fireproof sheet can be reliably locked. The fireproof sheet has a cut, and the cut has one or more first cuts that separate the two or more locking parts, and a second cut that is formed linearly in a direction perpendicular to the first cut and is provided at the boundary between the winding part and the locking part, and a part of the second cut is interrupted to connect the winding part and the locking part, so that when the winding part is rolled into a cylindrical shape, the locking parts can be easily folded in a direction away from each other. Since the fireproof sheet can be formed by simply providing cuts in a rectangular flat sheet, the fireproof sheet itself has a simple shape and can be manufactured relatively easily.

[0041] <Third feature> A third feature of the fire-resistant structure of the compartment penetration part is that, in addition to the first or second feature of the fire-resistant structure of the compartment penetration part, the axial length of the wrapping part of the fire-resistant sheet is longer than the axial length that needs to be wrapped around the elongated body to ensure the fire resistance of the compartment penetration part.

[0042] According to this, in addition to the first or second feature described above, the axial length of the wrapped portion of the fire-resistant sheet is longer than the length necessary to ensure fire resistance. Therefore, even if the length between the two claw portions becomes longer, for example when the diameter of the through hole is formed slightly longer, the two engaging portions can be engaged with the respective claw portions by widening one end of the wrapped portion of the fire-resistant sheet. In such a case, even if one end of the wrapped portion widens slightly, the length necessary to ensure fire resistance in the axial direction of the wrapped portion can be maintained.

[0043] <Fourth feature> The fireproof construction method for a penetration is a fireproof construction method for constructing a fireproof structure for a compartment penetration having any of the first to third characteristics described above, and includes a drilling step of forming the through hole in the compartment, a sleeve insertion step of inserting the cylindrical portion of the sleeve into the through hole, a long body insertion step of inserting the elongated body into the cylindrical portion of the sleeve, a filler filling step of filling the space between the sleeve and the long body with the filler, a locking step of locking the locking portion of the fireproof sheet to the claw portion of the sleeve, a wrapping step of wrapping and fixing the wrapping portion of the fireproof sheet to the long body, and an equipment installation step of wiring the long body to a specified device on the side opposite to the side where the locking portion is locked to the claw portion, across the compartment, and fixing the specified device to the compartment.

[0044] According to this, the locking portion of the fireproof sheet is locked to the claw portion at one end of the sleeve inserted in the sleeve insertion process, so that the fireproof sheet is held on one side of the partition, making the installation easier than if screws or staples were driven into the partition. Furthermore, even if an external force is applied to the elongated body when fixing a specific device to the partition in the equipment installation process, the fireproof sheet can be prevented from moving away from the appropriate position, so the equipment installation process can be easily performed without worrying about the position of the fireproof sheet.

[0045] <Fifth feature> In addition to the fourth feature described above, the fireproofing construction method for a penetration section has the following feature: the cylindrical section is elastic, has a slit along its entire axial length and overlaps in part to form a diameter larger than the through hole; and the sleeve insertion process involves reducing the diameter of the cylindrical section and inserting it into the through hole, and pushing it in until the claw portion abuts against one side of the partition section.

[0046] With this, in addition to the effect of the fourth feature described above, the cylindrical portion is elastic, has a slit along the entire axial length with some parts overlapping to form a diameter larger than the through hole, and the sleeve insertion process reduces the diameter of the cylindrical portion to insert it into the through hole, so that the elastic stress allows the cylindrical portion to be securely attached to the through hole, and by pushing the sleeve until the claw portion abuts one side of the partition portion, the sleeve can be securely installed in the appropriate position, and the sleeve can be prevented from shifting or falling off, and the fireproof sheet that engages with the claw portion of the sleeve can be held in the appropriate position. [Industrial Applicability]

[0047] The fireproof structure for a compartment penetration part and the fireproof construction method for a penetration part according to the present invention are suitable as a fire compartment penetration treatment and construction method. [Explanation of symbols]

[0048] 1. Fireproofing of compartment penetrations 2 Long body 3. Compartment 4 Through holes 5 Sleeve 6 Filling material 7. Fireproof Sheet 8. Prescribed Equipment 9 Cable ties 51 Cylindrical part 52 Claw part 53 Break 71 Winding section 72 Locking part 73 First cut 74 Second cut 76 Slit

Claims

1. A through hole formed in the partition portion; a sleeve including a cylindrical portion inserted into the through hole and a claw portion extending in a radially expanding direction from one end of the cylindrical portion in an axial direction and abutting against one surface of the partition portion; An elongated body to be inserted into the cylindrical portion; A filler material is filled between the sleeve and the elongated body; A fireproof sheet that is wrapped around the elongated body; Equipped with A fireproof structure for a compartment penetration portion, characterized in that the fireproof sheet has a wrapping portion that wraps around the elongated body and a locking portion that locks onto the claw portion.

2. The claw portion is formed in two or more pieces, The fireproof sheet is provided with two or more of the locking portions, and the two or more locking portions are formed by bending from one end of the winding portion in directions away from each other when the winding portion is wound around the elongated body, and each of the locking portions is formed with a slit into which the claw portion can be inserted, The fireproof sheet is formed by providing cuts in a rectangular flat sheet, The cut includes one or more first cuts that separate the two or more locking portions, and a second cut that is formed linearly in a direction perpendicular to the first cuts and is provided at a boundary between the winding portion and the locking portion, 2. The fireproof structure for a compartment penetration portion according to claim 1, characterized in that a portion of the second cut is interrupted to connect the wrapping portion and the locking portion.

3. A fireproof structure for a compartment penetration portion as described in claim 2, characterized in that the axial length of the wrapping portion of the fireproof sheet is longer than the axial length that needs to be wrapped around the elongated body to ensure fire resistance of the compartment penetration portion.

4. A method for constructing a fireproof structure for a compartment penetration part according to any one of claims 1 to 3, a drilling step of forming the through-hole in the partition portion; a sleeve insertion step of inserting the cylindrical portion of the sleeve into the through hole; an elongated body inserting step of inserting the elongated body into the cylindrical portion of the sleeve; a filler filling step of filling the gap between the sleeve and the elongated body with the filler; a locking step of locking the locking portion of the fireproof sheet to the claw portion of the sleeve; a winding step of winding and fixing the wound portion of the fireproof sheet to the elongated body; an equipment installation process of wiring the elongated body to a predetermined equipment on the side opposite to the side where the locking portion is locked to the claw portion across the partition portion, and fixing the predetermined equipment to the partition portion; A method for fireproofing a penetration part, comprising:

5. The cylindrical portion has elasticity, is provided with a slit extending over the entire length in the axial direction, and is formed so as to have a diameter larger than that of the through hole by overlapping a part of the slit, The method for fireproofing a penetration portion according to claim 4, characterized in that the sleeve insertion step comprises reducing the diameter of the cylindrical portion and inserting it into the penetration hole until the claw portion abuts against one surface of the partition portion.

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