Fireproof measure tool, and fireproof structure using fireproof measure tool

Abstract

To improve workability, to flexibly respond to changes in a diameter and shape of through holes, etc., and to obtain desired fireproof performance.SOLUTION: A fireproof device 1 for inserting a penetrating body 4 into a through hole 3 formed in a divided body 2 of a building comprises a support 5 that can be attached to the divided body 2 in an enclosing posture that surrounds the through hole 3, and a non-flammable blocking body 6 that is supported by the support 5 and blocks a space between the penetrating body 4 and the divided body. The support 5 is configured so that its position can be freely changed to a plurality of enclosing positions with different enclosing areas. The blocking body 6 is provided with a thermal expansion member 9 at an inner side where the penetrating body 4 is located.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a fire prevention device for inserting an inserting body into a through-hole formed in a partition of a building, and a fire prevention structure using the fire prevention device. [Background technology]

[0002] When inserting a pipe, cable, or other such object through a through hole formed in a partition such as a wall or floor, a fire prevention device is known that blocks the gap between the through hole and the insert to prevent a fire that breaks out in one space across the partition from spreading to the other space (see, for example, Patent Document 1).

[0003] The fire prevention device described in Patent Document 1 is provided with a fireproof member having a shape-retaining base material and a thermal expansion member laminated on the inner surface of the base material, and the fireproof member is attached to the partition body with fixing members such as screws in a state in which the inserter passes through a plurality of cutouts formed in the fireproof member. This allows the gap between the through hole and the inserter to be blocked by the fireproof member.

[0004] Furthermore, in the fire prevention device described in Patent Document 1, after the fireproof member is attached, the inside of the through hole surrounded by the partition body, the insert body, and the fireproof member is filled with a non-combustible material such as mortar. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2023-6147 Summary of the Invention [Problem to be solved by the invention]

[0006] The fire prevention device described in Patent Document 1 requires the work of filling the through-hole with non-combustible material in addition to the work of attaching the fire-resistant member, which is disadvantageous in terms of workability. Moreover, the work of filling the through-hole with non-combustible material is prone to variation depending on the worker, and there are cases where the desired fire prevention performance cannot be obtained.

[0007] Furthermore, in the fire prevention device described in Patent Document 1, when the fire-resistant member is attached to the partition body, the portion of the fire-resistant member that is closer to the outer periphery than the multiple cut portions is attached to the partition body, so the fire-resistant member needs to be larger than the diameter of the through hole.

[0008] For example, when various devices are replaced during renovations or other such work, the existing devices are removed and replaced with new devices. In order to remove the existing devices, chipping work is performed to remove the fire prevention devices and other equipment. Depending on the chipping conditions, such as when the chipping work must be performed from an oblique angle, the diameter or shape of the through-hole may change. Furthermore, even when new devices are inserted into the through-holes, if the number or type of devices to be inserted varies, the diameter or shape of the through-hole must be changed accordingly.

[0009] Because the diameter and shape of the through hole are not constant, the fire prevention device described in Patent Document 1 requires that the size of the fireproof member be changed to accommodate the changing diameter and shape of the through hole. For example, if the size of the fireproof member is too small relative to the diameter of the through hole, the fireproof member cannot be attached to the partition, or the gap between the through hole and the inserting member cannot be blocked with the fireproof member. Conversely, if the size of the fireproof member is too large relative to the diameter of the through hole, the area occupied by the fireproof member in the partition becomes large, which can become a nuisance and increase the cost of manufacturing the fireproof member.

[0010] For this reason, in the fire prevention device described in Patent Document 1, it is necessary to prepare fire-resistant materials of multiple sizes to accommodate changes in the diameter and shape of the through-hole, which not only increases the number of types of fire-resistant materials and makes them difficult to handle, but also increases manufacturing costs.

[0011] In view of this situation, the main object of the present invention is to provide a fire prevention device that can flexibly respond to changes in the diameter and shape of the through hole while improving workability, and that can obtain the desired fire prevention performance, and a fire prevention structure that uses the fire prevention device. [Means for solving the problem]

[0012] A first characteristic configuration of the present invention is a fire prevention device for inserting a penetrating body into a through hole formed in a partition of a building, a support body that can be attached to the partition body in a surrounding position that surrounds the through hole; a non-flammable blocking body that is supported by the support body and blocks a gap between the support body and the inserting body, the support body is configured to be able to freely change its posture to a plurality of surrounding postures having different surrounding areas, The closing body is provided with a thermal expansion member on the inner surface side where the inserting body is located.

[0013] According to this configuration, a blocking body is provided that is supported by a support attached to the partition body and blocks the gap between the partition body and the inserting body, so that the blocking body can block the gap between the partition body and the inserting body. Moreover, since a thermal expansion member is provided on the inner surface of the blocking body, if a fire attempts to spread through the through hole, the non-flammable blocking body can prevent the fire from spreading, and the thermal expansion of the thermal expansion member also closes the gap between the inserting body and the blocking body, thereby appropriately preventing the spread of the fire, thereby achieving the desired fire resistance. In this way, the desired fire resistance can be achieved by the blocking body and the thermal expansion member, eliminating the need to fill the through hole with non-flammable material, for example, and improving workability.

[0014] Furthermore, according to this configuration, the support body is configured to be able to freely change its position into a plurality of surrounding positions with different surrounding areas for the through hole, so that even if the diameter or shape of the through hole changes, for example, it can change its position into a surrounding position that corresponds to the changed diameter or shape of the through hole. This makes it possible to flexibly respond to changes in the diameter or shape of the through hole while still achieving the desired fire protection performance.

[0015] A second characteristic feature of the present invention is that the surrounding posture of the support body is set to a posture surrounding an outer periphery side of the through hole.

[0016] According to this configuration, the surrounding posture of the support is a posture that surrounds the outer peripheral side of the through-hole, so that the support can surround the outer peripheral side of the through-hole without leaving a gap between the through-hole and the support, and thus the blocking body supported by the support can block the through-hole without leaving a gap between the blocking body and the through-hole, and the desired fire prevention performance can be appropriately obtained.

[0017] A third characteristic feature of the present invention is that the support body is formed by connecting a number of component parts, and the component parts are connected to each other so as to be rotatable relative to one another.

[0018] According to this configuration, the support body is formed of a large number of parts that are rotatably connected to one another, so that by changing the number of connected parts or by changing the rotational state, such as the rotation angle between the parts, it is possible to change the position to a large number of surrounding positions in response to changes in the diameter, shape, etc. of the through-hole. This makes it possible to respond to subtle changes in the diameter, shape, etc. of the through-hole, thereby improving flexibility in response to changes in the diameter, shape, etc. of the through-hole.

[0019] A fourth characteristic feature of the present invention is that the support body is curved inward in the radial direction of the through hole by connecting a large number of the parts.

[0020] For example, if a support body formed by connecting multiple parts is in a straight line, when changing the position to the desired surrounding position, it is difficult to determine which side of the support body is the inside, and the direction in which the parts are rotated may be incorrect, which may result in time-consuming changes to the desired surrounding position and complicated work.

[0021] Therefore, with this configuration, the support body is curved inward of the through-hole by connecting multiple parts, so that in the curved position it is easy to determine which side of the support body is the inside, and the position can be easily changed from the curved position to the desired surrounding position without making an error in the direction of rotation of the parts, thereby improving workability.

[0022] A fifth characteristic configuration of the present invention is that the support body includes a partition body side mounting portion that is attached to the partition body and a block body side support portion that supports the block body, The partition-side mounting portion is disposed radially inward of the block-side support portion in the through-hole.

[0023] In the event that a fire attempts to spread through the through hole, the non-combustible blocking body can prevent the fire from spreading, and the thermal expansion of the thermal expansion member also blocks the gap between the insert and the blocking body, thereby appropriately preventing the spread of the fire. However, if heat is transferred to the thermal expansion member relatively quickly, thermal expansion occurs relatively quickly, making it difficult to expect further thermal expansion, and it may become difficult to maintain the function of blocking the gap between the insert and the blocking body.

[0024] Therefore, according to this configuration, by disposing the partition-side mounting portion of the support body radially inward of the obturator-side support portion, the obturator supported by the obturator-side support portion can be disposed as close to the outer periphery of the through hole as possible, which prevents heat from being transferred relatively early to the thermal expansion member provided in the obturator, makes it easier to maintain the function of sealing between the insert and the obturator, and makes it easier to obtain the desired fire protection performance.

[0025] A sixth characteristic feature of the present invention is that the thermal expansion member is disposed in a partial region of the blocking body in the longitudinal direction of the inserting body and on the side closer to the supporting body.

[0026] For example, if the thermal expansion member is provided over the entire closure, the cost of providing the thermal expansion member increases. When the thermal expansion member is provided in a partial region of the closure, if it is provided on the side of the insert away from the support in the longitudinal direction of the insert, in the event of a fire, etc., the location of the support and the location blocked by the thermal expansion member are separated, and the location of the support is located closer to the flames, so the support may melt relatively quickly, making it difficult for the support to continue supporting the closure.

[0027] Therefore, according to this configuration, the thermal expansion member is disposed in the longitudinal direction of the insert, on a part of the blocking body that is closer to the support body, thereby suppressing an increase in the cost of disposing the thermal expansion member, and enabling the location of the support body to be close to the location of the blocking body in the event of a fire, etc., preventing disadvantages such as the support body melting relatively early, allowing the support body to continue to support the blocking body, and making it easier to achieve the desired fire protection performance.

[0028] The seventh characteristic configuration of the present invention is that the partition body is provided with an opposite side blocking body on the side opposite to the side on which the support body and the blocking body are installed, which is non-flammable and blocks the gap between the through hole and the inserting body.

[0029] According to this configuration, the gap between the through hole and the insert can be blocked by the non-flammable opposite blocking body on the side opposite to the side where the support and blocking body of the partition are installed, which not only prevents a fire from spreading through the through hole to the side where the support and blocking body are installed, but also delays the transfer of heat to the support and blocking body, thereby improving fire resistance. Therefore, for example, on the side where the support and blocking body of the partition are installed, the desired fire resistance can be obtained even if the amount of thermal expansion member provided in the blocking body is reduced, thereby reducing costs and simplifying the configuration.

[0030] Furthermore, by closing the gap between the through-hole and the insert with the opposite-side blocker on the side opposite to where the support and blocker of the partition are installed, it is possible to prevent the thermal expansion member provided in the blocker from moving through the through-hole to the side opposite to where the support and blocker are installed, in the event of thermal expansion, etc., and it becomes easier to maintain the state in which the thermal expansion member closes the gap between the insert and blocker. Therefore, in this respect as well, it is possible to improve fire prevention performance.

[0031] An eighth characteristic configuration of the present invention is a fire prevention structure using a fire prevention device for inserting a penetrating body into a through hole formed in a partition of a building, The fire prevention device includes a support body that can be attached to the partition body in a surrounding position surrounding the through-hole; a non-flammable blocking body that is supported by the support body and blocks a gap between the support body and the inserting body, the support body is configured to be able to freely change its posture to a plurality of surrounding postures having different surrounding areas, The closing body is provided with a thermal expansion member on the inner surface side where the inserting body is located.

[0032] According to this configuration, the fire prevention device is supported by a support attached to the partition and includes a blocking body that blocks the gap between the partition and the inserting body, so that the blocking body can block the gap between the partition and the inserting body. Moreover, since the thermal expansion member is provided on the inner surface of the blocking body, if a fire attempts to spread through the through hole, the non-flammable blocking body can prevent the fire from spreading, while the thermal expansion of the thermal expansion member also blocks the gap between the inserting body and the blocking body, thereby appropriately preventing the spread of the fire, thereby achieving the desired fire prevention performance. In this way, the blocking body and the thermal expansion member can achieve the desired fire prevention performance, eliminating the need to fill the through hole with non-flammable material, for example, and improving workability.

[0033] Furthermore, according to this configuration, the support body of the fire prevention device is configured to be able to freely change its position to a plurality of surrounding positions with different surrounding areas, so that even if the diameter or shape of the through-hole changes, for example, it can change its position to a surrounding position that corresponds to the changed diameter or shape of the through-hole, etc. This makes it possible to flexibly respond to changes in the diameter or shape of the through-hole while still achieving the desired fire prevention performance. [Brief explanation of the drawings]

[0034] [Figure 1] (A) is a perspective view of the support, and (B) is a perspective view of the occlusion body. [Figure 2] FIG. 1A is a perspective view showing the connection state of the parts on the support body, and FIG. 1B is a cross-sectional view showing the connection state of the parts on the support body. [Figure 3] (A) is a perspective view of the part body as seen from the radially inner side, and (B) is a perspective view of the part body as seen from the radially outer side. [Figure 4] (A) is an explanatory diagram showing that the support can be freely changed to a plurality of surrounding positions by changing the diameter of the circular shape, and (B) is an explanatory diagram showing that the support can be freely changed to a plurality of surrounding positions by changing from a circular shape to an elliptical shape. [Figure 5] FIG. 1A is a diagram showing a through-hole formed in a partition body, and FIG. 1B is a diagram showing a state in which a support body is attached in a surrounding position surrounding the through-hole formed in the partition body. [Figure 6] (A) is a diagram showing the process of attaching and supporting the blocking body to the support body in the surrounding position, and (B) is a diagram showing the state in which the blocking body is attached and supported by the support body in the surrounding position. [Figure 7] (A) is a diagram showing the process of winding the wound portion of the closure body onto the penetrating body, and (B) is a diagram showing the state in which the wound portion of the closure body has been wound onto the penetrating body and fixed. [Figure 8] (A) is a cross-sectional view of the fire prevention device and the partition body, and (B) is a perspective view of the opposite blocking body etc. as seen from the other side of the partition body. [Figure 9] FIG. 10 is a perspective view of a support according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0035] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fire prevention device and a fire prevention structure using the fire prevention device according to the present invention will be described with reference to the drawings. As shown in Figures 5(A) and 7(B), this fire prevention device 1 is intended to provide fire prevention measures when an inserting body 4 is inserted into a through-hole 3 formed in a compartment 2 of a building. Incidentally, Figure 5(A) shows a through-hole 3 formed in an inclined shape with the radial center recessed downward more than the outer side (X2 side).

[0036] Walls and floors that divide a building into multiple spaces can be used as the partitions 2. Pipes (e.g., iron pipes, resin pipes) and cables that are laid across multiple spaces can be used as the penetrating bodies 4.

[0037] Hereinafter, with regard to the radial direction of the through hole 3, the radially inner side of the through hole 3 will be simply referred to as the "radially inner side," and the radially outer side of the through hole 3 will be simply referred to as the "radially outer side." As shown in Figures 1(A), 5(A), 5(B), etc., the radially inner side of the through hole 3 will be referred to as the X1 side, and the radially outer side of the through hole 3 will be referred to as the X2 side.

[0038] As shown in Fig. 5(B), the fire prevention device 1 is provided with a support body 5 that can be attached to the partition body 2 in a surrounding position surrounding the through-hole 3, and as shown in Figs. 6(B) and 7(B), a non-flammable blocking body 6 that is supported by the support body 5 and blocks the space between the through-hole 3 and the support body 5. Incidentally, in Fig. 5(B), the penetrating body 4 is omitted in order to show the positional relationship between the through-hole 3 and the support body 5.

[0039] (Support) As shown in Figures 1(A) and 2(A), the support body 5 is formed by connecting a large number of sub-units 7. As shown in Figure 3, each of the large number of sub-units 7 is formed in an L-shape having a first plate-like portion 71 extending in the vertical direction in the center of the left-right direction and a second plate-like portion 72 extending horizontally from the lower end of the first plate-like portion 71.

[0040] The support body 5 formed by connecting multiple parts 7 is attached to the partition body 2 in a surrounding posture surrounding the through-hole 3, with the second plate-shaped portion 72 positioned on the radially inner side (X1 side) and the first plate-shaped portion 71 positioned on the radially outer side (X2 side), as shown in FIG. 5(B). The lower surface of the second plate-shaped portion 72 faces the partition body 2, and as shown in FIG. 3, the lower surface of the second plate-shaped portion 72 is provided as a partition-side mounting portion 73 attached to the partition body 2. In contrast, as shown in FIGS. 3 and 6(A), the radially outer surface of the first plate-shaped portion 71 is provided as a block-body-side support portion 74 supporting the block body 6. Therefore, as shown in FIG. 5(B), when the support body 5 is attached to the partition body 2 in a surrounding posture, the partition-side mounting portion 73 is disposed radially inner (X1 side) than the block-body-side support portion 74.

[0041] In order to connect the multiple parts 7 to each other, as shown in Fig. 3, a rotation shaft portion 75 is arranged at one left-right end of the first plate-shaped portion 71 of each of the multiple parts 7, and a fitting portion 76 that fits onto the rotation shaft portion 75 is arranged at the other left-right end of the first plate-shaped portion 71. As shown in Fig. 2(A), by fitting the fitting portion 76 onto the rotation shaft portion 75, the parts 7 are connected to each other so as to be rotatable around the rotation axis P of the rotation shaft portion 75 (the axis along the longitudinal direction of the inserting body 4). First fitting portions 76a arranged at both ends in the vertical direction are provided so as to be able to fit onto the rotation shaft portion 75 from the radially outer side, and second fitting portion 76b arranged in the vertical center is provided so as to be able to fit onto the rotation shaft portion 75 from the radially inner side. The rotary shaft portion 75 is fitted to the three fitting portions 76 so as to be sandwiched between the outer and inner sides in the radial direction.

[0042] The parts 7 are connected to each other so as to be rotatable around the rotation axis P of the rotation shaft portion 75, but as shown in Figure 2(B), the range of rotation is restricted by a restricting portion 8. The restricting portion 8 is provided with a first restricting portion 81 on the rotation shaft portion 75 side and a second restricting portion 82 on the fitting portion 76 side, and the first restricting portion 81 and the second restricting portion 82 come into contact with each other, restricting the range of rotation of the parts 7 to each other.

[0043] As shown in FIG. 2B, the first restricting portion 81 is configured as a radially inwardly facing abutment surface on a protruding portion 83 disposed in the vertical center of the rotating shaft portion 75 and protruding laterally from the rotating shaft portion 75. The second restricting portion 82 is configured as a radially outwardly facing abutment surface disposed adjacent to the second fitting portion 76b disposed in the vertical center. The first restricting portion 81 and the second restricting portion 82 form abutment surfaces that face radially opposite each other with the first restricting portion 81 positioned radially outward of the second restricting portion 82. The abutment between the first restricting portion 81 and the second restricting portion 82 restricts the outward rotation of the parts 7 relative to each other. Thus, by connecting multiple parts 7 to form the support body 5, the outward rotation of the parts 7 relative to each other is restricted, and the support body 5 assumes a curved position curved radially inward (toward X1) as shown in FIG. 1A.

[0044] In each of the multiple sub-units 7, the first plate-like portion 71 is not formed in a straight line, but is formed in a curved shape that curves radially inward, as shown in Fig. 3. As a result, by connecting the multiple sub-units 7 so that the first plate-like portions 71 are continuously connected, the support body 5 formed by connecting the multiple sub-units 7 takes a curved position that curves radially inward with the first plate-like portions 71 continuously connected, as shown in Fig. 1(A).

[0045] 5(B), in the surrounding posture surrounding the through hole 3, the support body 5 has the second plate-shaped portion 72 positioned on the radially inner side (X1 side) and the first plate-shaped portion 71 positioned on the radially outer side (X2 side). Therefore, in the surrounding posture surrounding the through hole 3, it is determined which of the first plate-shaped portion 71 and the second plate-shaped portion 72 of the support body 5 is positioned on the radially inner side. Therefore, simply by connecting a large number of sub-members 7 to form the support body 5, when the support body 5 assumes a curved posture curved radially inward (X1 side) as shown in FIG. 1(A), the posture can be easily changed from the curved posture to the desired surrounding posture (see FIG. 5(B)) without making an error in the direction in which the sub-members 7 are rotated relative to each other.

[0046] Because the support body 5 is formed by connecting a large number of parts 7, it is possible to change the number of connected parts 7 and the rotational state, such as the rotation angle between the parts 7. Therefore, as shown in Fig. 4, by changing the number of parts 7 and the rotational state, such as the rotation angle between the parts 7, the support body 5 is configured to be able to freely change its position into a plurality of surrounding positions with different areas surrounding the through-hole 3.

[0047] 4(A) shows a surrounding posture in which the diameter of the circle surrounded by the support body 5 is changed by changing the number of parts 7. The dotted line shows a surrounding posture in which the diameter of the circle surrounded by the support body 5 is changed to be smaller by reducing the number of parts 7, and the dashed dotted line shows a surrounding posture in which the diameter of the circle surrounded by the support body 5 is changed to be larger by increasing the number of parts 7. FIG. 4(B) shows a surrounding posture in which the shape surrounded by the support body 5 is changed from a circular shape to an elliptical shape by increasing the number of parts 7 and changing the rotational state, such as the rotation angle between the parts 7.

[0048] (obstruction body) The blocking body 6 is made of a flexible and non-flammable material such as aluminum glass cloth, and is formed in a horizontally elongated rectangular shape with a width sufficient to surround the support body 5 (see FIG. 6(A)) in a surrounding position surrounding the through-hole 3 at least once, as shown in FIG. 1(B). The blocking body 6 has a lower end portion serving as an attachment support portion 61 that is attached to and supported by the blocking body side support portion 74 (see FIG. 6(A)) of the support body 5, and both left and right ends thereof serve as connecting portions 62 that connect both left and right ends of the blocking body 6. The blocking body 6 is provided in a state where the attachment support portion 61 is attached to and supported by the blocking body side support portion 74 of the support body 5, blocking the space between the partition body 2 (support body 5) and the penetrating body 4, as shown in FIG. 7(B).

[0049] As shown in FIG. 1(B), the blocking body 6 is provided with a thermal expansion member 9 on the inner surface side where the insert 4 is located. The thermal expansion member 9 is, for example, a member having thermal expansion properties (the property of increasing in volume when heated) and fire resistance (the property of being heat-resistant and having a high melting point and being difficult to burn). The thermal expansion member 9 is not provided on the entire blocking body 6, but is provided only on a partial region of the blocking body 6, and is formed in a horizontally elongated rectangular shape with a width sufficient to surround the support body 5 (see FIG. 6(A)) in a surrounding position surrounding the through-hole 3 at least once. The thermal expansion member 9 is disposed on a part of the blocking body 6 and on the side closer to the support body 5 (the lower side in FIG. 1(B)) in the longitudinal direction of the insert 4 (the vertical direction in FIG. 1(B)). The thermal expansion member 9 is arranged at a position adjacent to the mounting support portion 61 on the obstruction body 6, so that when the mounting support portion 61 of the obstruction body 6 is attached and supported to the obstruction body side support portion 74 of the support body 5, the thermal expansion member 9 is arranged at a position spaced apart from the support body 5 (at a position that does not overlap with the support body 5), as shown in Figure 6(A).

[0050] When connecting the connecting portions 62 in the left-right direction of the blocking body 6, as shown in Fig. 1(B), a connecting thermal expansion member 91 is disposed between the connecting portions 62. In this way, in the event of a fire or the like, the connecting thermal expansion member 91 thermally expands, thereby sealing the gap between the connecting portions 62 in the left-right direction of the blocking body 6 with the connecting thermal expansion member 91, thereby preventing the spread of flames from between the connecting portions 62.

[0051] A method for installing the fire prevention device 1 will be described below. First, as shown in Fig. 5(A), adhesive S is applied around the through-hole 3 formed in the partition 2, and then, as shown in Fig. 5(B), a support attachment process is performed in which the support 5 is attached to the partition 2 in a surrounding position so as to surround the through-hole 3 formed in the partition 2. At this time, as shown in Fig. 3(A), the lower surface of the second plate-like portion 72 of the support 5 forms a flat partition-side attachment portion 73, and the support 5 is attached to the partition 2 by abutting the partition-side attachment portion 73 against the portion of the partition 2 where the adhesive S is applied.

[0052] When attaching the support 5 to the partition 2, the diameter, shape, etc. of the through hole 3 are not constant, and the diameter, shape, etc. of the through hole 3 change depending on various conditions. For example, when replacing various devices due to renovations or the like, the penetrating bodies 4 corresponding to the existing devices are removed and replaced with penetrating bodies 4 corresponding to the new devices. At this time, in order to remove the penetrating bodies 4 inserted through the through holes 3 of the partition 2, a chipping operation is performed to remove the existing fire prevention devices 1, etc. Therefore, depending on the work conditions of the chipping operation, such as when the chipping operation needs to be performed from an oblique angle, the diameter or shape of the through hole 3 may change. Furthermore, even when a new penetrating body 4 is inserted through the through hole 3, if the number or type of penetrating bodies 4 to be inserted through the through hole 3 is different, it becomes necessary to change the diameter, etc. of the through hole 3 depending on the number and type of penetrating bodies 4. FIG. 5(A) shows a through hole 3 formed by chipping so that the central portion in the radial direction is recessed downward relative to the outer side (X2 side) in an inclined shape.

[0053] As described above, the diameter, shape, etc. of the through hole 3 change depending on various conditions, and therefore the support body 5 is required to assume a surrounding posture that surrounds the through hole 3 in accordance with the changing diameter, shape, etc. of the through hole 3. Therefore, as shown in FIG. 4 , the support body 5 is configured to be able to freely change its posture to a plurality of surrounding postures that differ in the area surrounding the through hole 3 by changing the number of parts 7 or by changing the rotational state, such as the rotation angle between the parts 7 about the rotation axis P (see FIG. 2(A)) at the rotation shaft portion 75. As a result, even if the diameter, shape, etc. of the through hole 3 changes, the posture can be changed to a surrounding posture that corresponds to the change in the diameter, shape, etc. of the through hole 3 by changing the number of parts 7 or by changing the rotational state, such as the rotation angle between the parts 7.

[0054] For example, if the diameter of the through-hole 3 is reduced, the diameter of the circular shape surrounded by the support body 5 in the surrounding position can be reduced by reducing the number of parts 7, as shown by the dotted line in Fig. 4(A). Even if the shape of the through-hole 3 changes from a circular shape to an elliptical shape, the shape surrounded by the support body 5 in the surrounding position can be changed from a circular shape to an elliptical shape by increasing the number of parts 7 and changing the rotational state, such as the rotation angle between the parts 7, as shown by the dotted line in Fig. 4(B).

[0055] In this way, even if the diameter or shape of the through-hole 3 changes, the surrounding posture of the support body 5 can be changed to a surrounding posture with a different circular diameter or surrounding shape so as to correspond to the changed through-hole 3. As shown in FIG. 5(B), the surrounding posture of the support body 5 is set to a posture surrounding the outer periphery of the through-hole 3. This allows the support body 5 to be attached to the partition body 2 without leaving a gap between the through-hole 3 and the support body 5.

[0056] After the support body attaching step, a closure body attaching step is performed in which the closure body 6 is attached to the support body 5 while being supported thereon, as shown in Figures 6(A) and (B). In this closure body attaching step, as shown in Figure 6(A), the outer surface of the first plate-like portion 71 of the support body 5 forms a flat closure body side support portion 74, and therefore, the attachment support portion 61 of the closure body 6 is attached and supported to the closure body side support portion 74 of the support body 5 using a fixture such as double-sided tape. At this time, by attaching the closure body 6 with the edge portion of the attachment support portion 61 of the closure body 6 in contact with the partition body 2, the closure body 6 can be attached without creating a gap between the closure body 6 and the partition body 2. When the attachment support portion 61 of the closure body 6 is attached and supported to the closure body side support portion 74 of the support body 5, the connecting portions 62 at both left and right ends of the closure body 6 (see Figure 1(B)) are connected to each other using a fixture such as double-sided tape.

[0057] Incidentally, in addition to double-sided tape, well-known restraining devices can be used to attach the blocking body 6 to the support body 5, such as wire, vinyl ties, tape, insulation ties, tape containing non-flammable materials such as aluminum or glass cloth and aluminum glass cloth laminated with these, and two or more of these can be used in combination as appropriate, such as by attaching it with double-sided tape and then tying it from the outside with wire.

[0058] By performing the obturator attachment step, the obturator 6 assumes a position in which it is spaced apart from the penetrating body 4 and extends in the longitudinal direction of the penetrating body 4 (the up-and-down direction in FIG. 6(B)), as shown in FIG. 6(B). Then, the wound portion 63 of the obturator 6, which is spaced apart from the penetrating body 4, is wound around the penetrating body 4 and moved toward the partitioning body 2, as shown in FIG. 7(A). Then, the wound portion 63 of the obturator 6 wound around the penetrating body 4 is fixed to the penetrating body 4 using a tie K, as shown in FIG. 7(B). In this way, the obturator 6 blocks the space between the partitioning body 2 and the penetrating body 4.

[0059] The wrapping portion 63 of the blocking body 6 may be fixed using well-known restraining devices such as wire, vinyl ties, tape, insulation locks, tape containing non-flammable materials such as aluminum or glass cloth, and aluminum glass cloth laminated with these. If necessary, two or more of these may be used in combination, such as by tying with wire and then attaching aluminum glass cloth tape to the outside.

[0060] As a fire prevention structure using the fire prevention device 1, as described above, the fire prevention device 1 is provided with the support body 5 that can be attached to the partition body 2 in a surrounding position that surrounds the through-hole 3, and the non-flammable blocking body 6 that is supported by the support body 5 and blocks the space between it and the inserting body 4. The support body 5 is configured so that its position can be freely changed to a plurality of surrounding positions with different surrounding areas, and the blocking body 6 is provided with a thermal expansion member 9 on the inner side where the inserting body 4 is located.

[0061] As described above, as shown in FIG. 8, fire prevention measures are taken on one side 2a of the partition 2 (upper side in FIG. 8(A)) by installing the support body 5 and the blocking body 6. However, fire prevention measures can also be taken on the other side 2b of the partition 2 (lower side in FIG. 8(A)) by providing an opposite side blocking body 101 that is non-combustible and blocks the gap between the through hole 3 and the inserting body 4. In this way, by providing the opposite side blocking body 101 in addition to the support body 5 and the blocking body 6 as the fire prevention device 1, fire prevention measures can be taken on both the one side 2a and the other side 2b of the partition 2, thereby improving fire prevention performance. Incidentally, if the partition 2 is a floor part, the one side 2a of the partition 2 will be the floor side, and the other side 2b of the partition 2 will be the ceiling side.

[0062] The opposite side closing body 101 is formed in a sheet shape by bonding, for example, polyethylene foam and glass fiber reinforced aluminum foil with an adhesive, and by bonding an adhesive layer of the adhesive provided on the outside of the polyethylene foam to the surface of the other side 2b of the partition 2, the opposite side closing body 101 can be attached and fixed freely to the surface of the other side 2b of the partition 2. When the opposite side closing body 101 is attached to the surface of the other side 2b of the partition 2, the glass fiber reinforced aluminum foil is exposed (positioned on the opposite side to the surface of the other side 2b).

[0063] Although not shown, multiple slits are formed in the central portion of the opposite-side closure body 101, and as shown in Fig. 8(B), the penetrating body 4 is inserted through the multiple slits into the opposite-side closure body 101. At least one of the multiple slits extends to the outer end of the opposite-side closure body 101, so that even if the penetrating body 4 has already been fixed, the penetrating body 4 can be inserted through the slit extended to the outer end.

[0064] As shown in Fig. 8, when the penetrating body 4 is inserted through the opposite side blocking body 101, the central portion of the opposite side blocking body 101 is bent to form a bent portion 102, and the bent portion 102 abuts against the outer periphery of the penetrating body 4. With the bent portion 102 abutting against the outer periphery of the penetrating body 4, a presser tape 103 is wrapped around the outer periphery of the penetrating body 4 from above the bent portion 102, thereby preventing gaps from being generated between the opposite side blocking body 101 and the penetrating body 4 at the bent portion 102 or the like. This allows the opposite side blocking body 101 to properly block the gap between the through hole 3 and the penetrating body 4.

[0065] There is no set construction priority between the process of installing the support body 5 and the blocking body 6 by performing the support body mounting process and the blocking body mounting process on one side 2a of the partition body 2, and the process of installing the opposite side blocking body 101 on the other side 2b of the partition body 2, and which process is performed first can be changed as appropriate depending on the construction situation, etc.

[0066] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

[0067] (1) In the above embodiment, the support body 5 is formed by connecting a large number of part bodies 7, but for example, as shown in FIG. 9, by providing a large number of unit part portions 12 in a continuous series, the support body 11 can be formed as a long body that is continuous in a continuous series in its longitudinal direction. The unit part portions 12 are formed in an L-shape, like the part body 7 in the above embodiment, and although explanation will be omitted, they have the same function and configuration as the part body 7 in the above embodiment. Incidentally, the unit part portions 12 basically have the same configuration, but openings 15 are formed only in a set number of unit part portions 12 from one end of the support body 11 in the longitudinal direction (the set number of unit part portions 12 located on the left side in FIG. 9).

[0068] As shown in Fig. 9, the support body 11 is formed to assume a curved posture that curves radially inward, similar to the support body 5 of the above embodiment. In order to connect the unit part portion 12 at one end side (left side in Fig. 9) of the support body 11 in the longitudinal direction to the unit part portion 12 at the other end side (right side in Fig. 9) of the support body 11 in the longitudinal direction, a connecting portion 13 is provided so as to be continuous with the unit part portion 12 at the other end side (right side in Fig. 9) of the support body 11 in the longitudinal direction.

[0069] Although detailed illustration is omitted, the connecting portion 13 has a double-wall structure with a gap between its radially inner and outer sides, and the connecting portion 13 is fitted from above into the unit part portion 12 at one end in the longitudinal direction (the left side in FIG. 9 ), thereby disposing the unit part portion 12 between the double walls. The unit part portions 12 located at both ends are connected and fixed by fitting the claw portions 16 formed on the connecting portion 13 into the openings 15 of the unit part portions 12. In this way, by connecting the unit part portions 12 located at both ends by the connecting portion 13, the support body 11 is configured to be able to freely change its position to a surrounding position that surrounds the through-hole 3.

[0070] Thin cut-out regions 14 are provided between the unit part regions 12, and the unit part regions 12 can be cut freely at these cut-out regions 14. This makes it possible to change the length of the support body 11 by cutting out one or more unit part regions 12 using the length of the unit part region 12 as a reference. It is also possible to change the curved state (bent state), such as the curve angle between the unit part regions 12, at the cut-out regions 14.

[0071] Therefore, by changing the length of the support body 11 or changing the curvature state (bent state) such as the curvature angle between the unit part portions 12 at the cut-out portion 14, the support body 11 is configured to be able to freely change its position into multiple surrounding positions with different areas surrounding the through hole 3, similar to the support body 5 in the above embodiment.

[0072] (2) In the above embodiment, when attaching the support body 5 to the partition body 2, the support body 5 is attached to the partition body 2 using adhesive S. However, the support body 5 can also be attached to the partition body 2 using a fixing device such as a screw, and the type of fixing member used can be changed as appropriate.

[0073] (3) In the above embodiment, the support body 5 is formed by connecting a large number of sub-units 7, but the number of sub-units 7 connected can be changed as appropriate. For example, the number can be three or more, six or more, or the support body can be formed by connecting two sub-units by increasing the length of the sub-units, for example.

[0074] (4) In the above embodiment, when supporting the obturator 6 on the support body 5, for example, a protrusion may be provided on the outside of the support body 5 and the protrusion of the support body 5 may be inserted into an insertion hole previously provided in the obturator 6, thereby supporting the obturator 6 on the support body 5; alternatively, a slit may be provided in the support body 5 and the obturator 6 may be inserted or hooked into the slit, thereby supporting the obturator 6 on the support body 5. [Explanation of symbols]

[0075] 1 Fire prevention equipment 2 compartments 3 Through holes 4 Penetrator 5 Support 6 Obstruction body 7 Parts 9 Thermal expansion members 11 Support 73 Partition side mounting part 74 Obturator side support part 101 Opposite side obstruction body X1 Radial inner side of through hole X2 Radial outer side of through hole

Claims

1. A fire prevention device for inserting an inserting body into a through hole formed in a partition body of a building, a support body that can be attached to the partition body in a surrounding position that surrounds the through hole; a non-flammable blocking body that is supported by the support body and blocks a gap between the support body and the inserting body, the support body is configured to be able to freely change its posture to a plurality of surrounding postures having different surrounding areas, The fire prevention device has a thermal expansion member on the inner surface of the blocking body where the inserting body is located.

2. The fire prevention device according to claim 1, wherein the surrounding posture of the support body is set to a posture surrounding an outer periphery side of the through hole.

3. 3. The fire-preventing device according to claim 1, wherein the support body is formed by connecting a number of parts, and the parts are connected to each other so as to be rotatable.

4. The fire prevention device according to claim 3, wherein the support body is curved inward in the radial direction of the through hole by connecting a large number of the parts.

5. The support body includes a partition body side mounting portion that is attached to the partition body, and a block body side support portion that supports the block body, 3. The fire prevention device according to claim 1, wherein the partition-side mounting portion is disposed radially inward of the blocking-side support portion in the through-hole.

6. 3. The fire prevention device according to claim 1, wherein the thermal expansion member is disposed in a partial region of the blocking body in the longitudinal direction of the inserting body and on a side closer to the support body.

7. A fire prevention device as described in claim 1 or 2, wherein an opposite-side blocking body that is non-flammable and blocks the gap between the through hole and the inserting body is provided on the opposite side of the partition body from the side on which the support body and the blocking body are installed.

8. In a fire prevention structure using a fire prevention device for inserting an inserting body into a through hole formed in a partition body of a building, The fire prevention device includes a support body that can be attached to the partition body in a surrounding position surrounding the through-hole; a non-flammable blocking body that is supported by the support body and blocks a gap between the support body and the inserting body, the support body is configured to be able to freely change its posture to a plurality of surrounding postures having different surrounding areas, A fireproof structure in which the blocking body is provided with a thermal expansion member on the inner surface side where the inserting body is located.

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