JP2007075515A - Tool and method for fireproofing opening portion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To permit the implementation of a simple, quick and reliable fireproofing measure for an opening portion between the through portion of a divider and an insert put through the through portion. <P>SOLUTION: In the opening portion fireproofing tool 1 which is arranged between the through portion of the divider and the insert to be put through the through portion, a thermally expandable fire-resistant material 2 which can be elastically compressed into a volumetrically contracted condition in the diametrical direction of the insert at the time of arrangement to the opening portion is housed in a flexible airtight bag 3 in a state of bound in the volumetrically contracted condition by deaeration of the bag in a sealed condition, and a fire-resistant material restoration means 3B to elastically restore the volumetric capacity of the thermally expandable fire-resistant material 2 within the maximum capacity range of the flexible airtight bag 3 by releasing the sealing of the flexible airtight bag 3 is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an opening fire protection device disposed in an opening between a penetrating portion of a partitioning body and a penetrating body inserted through the partitioning body, and a penetrating body inserted through the penetrating portion of the partitioning body. It is related with the opening part fire prevention method construction which obstruct | occludes or substantially obstruct | occludes an opening part by arrange | positioning to the opening part between.

  This kind of opening fire prevention device is deployed in the opening for the purpose of suppressing the intrusion of flames and smoke into the partition through the through part of the partition and the opening inserted therethrough, The flexible, heat-expandable fire-resistant block mainly composed of flame-retardant foamed polyurethane molded in an appropriate size that is easy to handle was covered with a non-combustible sheet such as a glass fiber fabric.

  Such an opening fire-protection device can be handled without touching the heat-expandable fireproof block by covering the heat-expandable fireproof block with a non-combustible sheet, and the heat-expandable fireproof block of the heat-expandable fireproof block during construction can be handled. With the flexibility of the thermally expandable refractory block, it is possible to suppress the chipping, and the opening between the penetrating part of the partition body such as a wall or floor and the penetrating body such as the cable inserted through this By opening the openings with high accuracy by pressing a plurality of opening fire prevention devices against one side of the opening (for example, the inner peripheral surface side of the penetrating portion) and sequentially deforming the openings so that there is no gap between them. This allows the gap formed by the thermal melting or burning of the penetrating body in the event of a fire to be quickly closed by the thermal expansion of the thermally expandable refractory block, and through the opening. Flame or smoke was it possible to effectively prevent the entering the partition-side.

  However, in the conventional opening fire prevention device as described above, in order to close the opening with high accuracy, a plurality of opening closing devices are pressed against one side of the opening so that no gap is formed in the opening. Since they have to be packed sequentially, there is a problem that it takes a considerable amount of time to deploy a plurality of opening fire protection devices in the opening.

  In addition, since the accuracy of closing of the opening is completely left to the work accuracy of the installer, it is not possible to suppress the occurrence of variations in the accuracy of closing by the installer. The actual situation is that the reliability of the fire prevention performance at the time of fire is not sufficient, for example, there is a time delay in closing the gap caused by burning.

  The present invention has been made in view of the above-described problems, and it is simple and reliable for an opening between a penetrating portion of a partition body and a penetrating body inserted through the partitioning portion. It is in the point which provides the opening part fire prevention tool which can perform a highly reliable fire prevention measure, and the opening part fire prevention method.

The first characteristic configuration of the present invention relates to an opening fire protection device,
An opening fire prevention device provided at an opening between a penetrating portion of a partition body and a penetrating body inserted through the partitioning portion,
The heat-expandable refractory material that can be elastically compressed to the volume-reduced state in the radial direction of the penetrating body at the time of deployment to the opening is possible in a state where it is constrained to the volume-reduced state by deaeration of air in the bag in a sealed state. A refractory material restoring means for elastically restoring the volume of the heat-expandable refractory material within the maximum capacity range of the flexible air-tight bag by disclosing the sealing of the flexible air-tight bag while being housed in the flexible air-tight bag Is in the point provided.

  According to the first characteristic configuration, after the flexible airtight bag in which the thermally expandable refractory material is housed in a volume-reduced state is disposed in the opening, the volume of the thermally expandable refractory material is reduced by the refractory material restoring means. Since it can be elastically restored in the radial direction of the penetrating body (that is, the side where the opening is closed), it should be constructed in such a way as to allow some gaps in the opening in anticipation of elastic restoration of the thermally expandable refractory material. As a result, construction work can be simplified and construction time can be shortened, and variation in the closing accuracy of the opening by the installer can be suppressed. The reliability for the fire prevention performance at the time can also be improved. Moreover, since the heat-expandable refractory material is in a volume-reduced state before construction, it can be advantageous in terms of storage and transportation.

The second feature configuration of the present invention specifies a preferred embodiment in the implementation of the first feature configuration.
The refractory material restoring means is a switching means for switching the flexible airtight bag between a sealed state and a sealed release state.

  According to the second characteristic configuration, even if the thermally expansible refractory material is elastically restored by releasing the sealing, the switching means can restore the sealed state again. Therefore, the thermally expansible refractory material is elastically restored and opened. It is possible to prevent the heat-expandable refractory material from getting wet with water by placing it in a sealed state after it has been deployed in the area. A decrease can be prevented.

The third feature configuration of the present invention specifies a preferred embodiment in the implementation of the first and second feature configurations.
At least a part of the outer surface of the flexible airtight bag is formed by a through surface of the partition and a rough surface capable of suppressing sliding or sliding with respect to the through body.

  According to the above third feature configuration, a state in which a certain amount of clearance is allowed to be generated in the opening, in other words, even when the opening is in contact with only one of the penetration and the penetration, the penetration of the partition Alternatively, since sliding or sliding with respect to the penetrating body can be suppressed, it is possible to prevent the flexible bag body in which the thermally expandable refractory material is housed from being displaced before elastic recovery of the thermally expandable refractory material. Therefore, it is possible to further simplify the construction work and shorten the construction time.

The fourth feature configuration of the present invention specifies a preferred embodiment in the implementation of the first to third feature configurations.
The thermally expandable refractory material is configured by laminating flexible thermally expandable fireproof sheets in the radial direction of the through body, and the length of the flexible airtight bag in the circumferential direction of the flexible body is the thermal expansion. It exists in the point formed in the length larger than the penetration body circumferential direction length of a refractory fireproof material.

  That is, for example, although it is conceivable to integrally mold the heat-expandable refractory material, in that case, when bent and deformed along the outer peripheral surface of the penetrating body, the inner portion and the outer portion of the heat-expandable refractory material, The circumferential direction compressive force acts on the inner part and the inner part is contracted and deformed in the circumferential direction due to the difference in the curvature diameter (or curvature) of the outer part, and the outer part is surrounded by the circumferential tensile force acting on the outer part. Since it is stretched and deformed in the direction, it is impossible to sufficiently exert the elasticity in the radial direction of the opening fire protection device, thereby reducing the closing accuracy of the opening.

  On the other hand, in the case of the fourth characteristic configuration, when the flexible thermally expandable refractory sheet laminated in the radial direction of the penetrating body is bent and deformed and installed in the opening, each sheet is placed between adjacent sheets. Since the circumferential relative movement can be performed, the thermal expansion refractory material is not subjected to the circumferential compression force of the penetrating body and the circumferential tensile force of the penetrating body to the outer portion, and between the penetrating portion and the penetrating body. Can be deformed in accordance with the shape of the inner peripheral surface of the penetrating part or the outer peripheral surface of the penetrating body by sufficiently exerting the elasticity in the radial direction. Can be.

The fifth characteristic configuration of the present invention relates to the opening fire prevention method,
After disposing the opening fire protection device according to claim 1 to the opening, the volume of the thermally expandable refractory material in the opening fire protection device of the partition is elastically restored to close the opening. Or almost at the point of blockage.

  According to the fifth characteristic configuration described above, a highly reliable fire prevention measure is applied to the front end portion of the partition body through portion and the through body inserted through the partition body in a short work time with a simple work content. be able to.

The sixth characteristic configuration of the present invention relates to the opening fire prevention method, and the characteristic is
A fire-resistant measure for an opening portion, in which a thermally expandable refractory material that is elastically compressible in a volume-reduced state is housed in a flexible air-tight bag in a state of being restrained in the volume-reduced state by deaeration of air in the bag in a sealed state The maximum capacity range of the flexible airtight bag is released by releasing the sealing of the flexible airtight bag after the tool is disposed in the opening between the penetrating portion of the partitioning body and the through body inserted therethrough The volume of the heat-expandable refractory material is elastically restored in the radial direction of the penetrating body, thereby closing or substantially closing the opening.

  According to the sixth characteristic configuration, after the opening fire protection device in which the thermally expandable refractory material is in a volume-reduced state is disposed in the opening of the partition body, the flexible airtight bag is released to be flexible. Simple work content that only elastically restores the volume of the heat-expandable refractory material in the radial direction of the penetrating body within the maximum capacity range of the airtight bag, and is inserted into the through part of the partition body in a short working time. A highly reliable fire-protection measure can be applied to the front end of the penetrating body.

  1 to 5 are, for example, a through-hole opened in a fire protection compartment such as a wall W or a floor S as shown in FIGS. 6 to 11, or a metal sleeve that is not shown in the drawing and fixed to the compartment. In order to close the opening Ha between the penetrating part H of the partition body and the penetrating body such as the cable K inserted therethrough, such as a penetrating part formed with the opening part, fire prevention measures provided at the opening part Ha 1 shows a tool 1, and 2 is a thermally expandable refractory material having flexibility capable of bending deformation and elastically compressible elasticity, and a lock having heat insulation, which is an example of a refractory material and a soundproof material. A plurality of thermally expanded refractory sheets 2A composed mainly of wool and containing unfired vermiculite powder, which is an example of a thermally expandable material, are laminated in the thickness direction (the through body radial direction when deployed in the opening Ha). It is configured.

  Reference numeral 3 denotes a bag body made of a translucent polyethylene film having flexibility and airtightness, which is made into a bag shape in which the heat-expandable refractory material 2 can be installed, and is inserted for inserting the heat-expandable refractory material 2 The overlapping portions 3c, 3d, and 3e around the storage space excluding the opening 3A are heat-welded, and the insertion port 3A is provided with a fastener 3B that can close the insertion port 3A by closing. .

  The fastener 3B has a pair of fitting grooves 3a each having a length extending over the entire lateral width of the bag body 3 at opposing portions on the inner side surface around the insertion port 3A, and a bag that can be elastically fitted to the bag 3 in an airtight state. A pair of fitting protrusions 3b having a length over the entire lateral width of the body 3 is provided, and both ends of the fitting groove 3a and both ends of the fitting protrusion 3b are elastically fitted. Thus, these portions are heat-welded and adhered together with the bag body 3, and the inside of the bag body 3 can be switched between a sealed state and a sealed release state by an opening / closing operation.

  In the state where the fastener 3B is opened (FIGS. 2 and 4), the set thickness (length in the through-body radial direction) 3D of the bag body 3 is slightly larger than the sheet lamination thickness 2D of the thermally expandable refractory material 2. The length of the bag 3 (the length in the penetrating body length direction) 3w is slightly larger than the width 2w of the heat-expandable refractory material 2, and the interior of the heat-expandable refractory material 2 is formed. In such a state, the bag is formed so that excess spaces S1 and S2 are formed between both end portions in the length direction of the bag body 3 and both end portions 2d in the length direction (penetrating body circumferential direction) of the thermally expandable refractory material 2, respectively. The length 3l in the length direction of the body 3 is formed to be longer than the length 2l in the length direction of the heat-expandable refractory material 2, and a plurality of heat-expandable fire-resistant sheets using the surplus spaces S1 and S2. While allowing relative movement in the length direction between adjacent sheets in 2A, it corresponds to the surplus spaces S1 and S2. The both side portions of the body 3, are also used configuration grip portion for handling opening fire action device 1.

  The outer peripheral surface of the bag 3 is embossed and formed into a rough surface having a large number of convex portions 3f, and slides in contact with the inner peripheral surface of the through-hole H and the outer peripheral surface of the cable K. Alternatively, resistance can be applied to relative movement such as sliding.

  In addition, although the insertion port 3A is provided in the longitudinal direction edge part of the thermal expansion refractory material 2, what is necessary is just to change suitably according to the usage type mentioned later.

  And the opening part fire-protection tool 1 reduces the capacity | capacitance in a bag by pressure reduction by deaeration of the air in the bag of the bag body 3 in the sealing state which closed the fastener 3B in the state which includes the thermally expansible fireproof material 2. The heat-expandable refractory material 2 is constrained in the volume-reduced state (in this embodiment, the volume is about 1/3) that is elastically compressed by the state (the state shown in FIGS. 1, 2, and 4), and the fastener 3B is opened. By operating to release the sealed state of the bag body 3, the volume of the thermally expandable refractory material 2 is elastically restored within the maximum capacity range of the bag body 3 (states of FIGS. 3 and 5).

  In the present embodiment, the fastener 3B corresponds to the refractory material restoring means referred to in the first characteristic configuration of the present invention, and also corresponds to the switching means referred to in the second characteristic configuration of the present invention.

In manufacturing the opening fire prevention device 1 of the present embodiment, a deaeration device including a suction hose is used to deaerate the air in the bag of the bag body 3.
Specifically, after opening the fastener 3B of the bag 3 and inserting the thermally expandable refractory material 2 through the insertion port 3A, the suction hose of the deaerator is inserted into the bag from the insertion port 3A. By closing the fastener 3B, the insertion port 3A excluding the portion into which the suction hose is inserted is substantially sealed, and the air in the bag is deaerated by operating the deaerator in that state.

  When the deaeration of the air in the bag is completed to a desired state, the suction hose is quickly removed from the insertion port 3A, the fastener 3B is closed, and the insertion port 3A is sealed to deaerate the inside of the bag body 3. Thus, the thermally expandable refractory material 2 is maintained in a volume reduced state.

  Next, the opening part fire-protection method 1 which arrange | positions the opening part fire-protection tool 1 of this invention to the opening part Ha is given and demonstrated using an example. For convenience, out of the plurality of thermally expandable fireproof sheets 2A constituting the opening fire protection device 1, the outermost sheet is the outer sheet 2a, and the innermost sheet when in use is the inner sheet 2c. The sheet located in the middle will be described as the intermediate sheet 2b.

(A) Usage example 1
6 and 7 show an example of the use of a relatively small number of cables K for the inner peripheral surface of a small circular through-hole H formed on the wall W and a plurality of cables K (three in this use example). The opening portion fire prevention device 1 is closed or substantially closed by disposing the opening portion fire prevention device 1 in the annular opening Ha between the outer peripheral surface and the opening portion fire prevention device 1 is a thermally expandable fireproof device. The length 2l in the length direction of the material 2 is formed to be the same or substantially the same length as the outer peripheral length of the cable K in a state where no compressive force is applied, and is bent into a cylindrical shape along the outer peripheral surface of the cable K. In this case, the end surfaces of both end portions 2d in the length direction of the inner sheet 2c come into contact (contact) from the circumferential direction so that the outer peripheral surface of the cable K can be covered.

  Further, the insertion port 3A is provided at the end in the length direction, which is the short side of the bag body 3, and the fastener length of the fastener 3B is shortened as much as possible so that the inside of the bag can be sealed efficiently.

  First, the opening fire protection device 1 is inserted into the opening Ha from the outside in a state of being bent and deformed into a cylindrical shape along the outer peripheral surface of the cable K in the stacking direction of the thermally expandable fireproof sheet 2A. (In the state of FIG. 6). At this time, the opening fire protection device 1 is not sandwiched between the inner peripheral surface of the through-hole H and the outer peripheral surface of the cable K, but the position of the opening fire-protective device 1 is reduced by the frictional resistance between the outer surface and the inner peripheral surface of the through-hole H. Is kept as much as possible.

  Next, the fastener 3B of the bag body 3 of the opening fire prevention tool 1 is opened and operated. By this opening operation, the sealing of the bag body 3 is released, and as described above, the thermally expandable refractory material 2 is automatically elastically restored in the radial direction of the penetrating body as the capacity of the bag body 3 increases, and the opening is opened. The portion Ha is closed or almost closed (the state shown in FIG. 7).

  After the volume of the thermally expandable refractory material 2 is elastically restored, the fastener 3B is closed again, and the inside of the bag body 3 is hermetically sealed, so that the opening portion fire-proofing in the state where the opening portion Ha is provided. It is possible to suppress the heat-expandable refractory material 2 in the measure tool 1 from getting wet with water, and to suppress a decrease in expected performance such as fire-resistance performance and heat insulation performance due to the water-expandability of the heat-expandable refractory material 2. .

  Incidentally, the thermally expandable refractory material 2 in the opening fire prevention device 1 provided in the opening Ha has a larger diameter than the intermediate sheet 2b (in other words, the curvature is larger). Since both end portions 2d in the length direction are relatively moved toward the center in the circumferential direction as compared with the intermediate sheet 2b, and the inner sheet 2c has a smaller radius of curvature than the intermediate sheet 2b. In other words (because the curvature increases), both end portions in the length direction are relatively moved outward in the circumferential direction as compared to the intermediate sheet 2b. There is almost no circumferential compressive force or circumferential tensile force acting as a restraining force against the elastic deformation of the fire protection device 1.

  Therefore, the part (clamping part 2e) which contact | connects both the internal peripheral surface of the penetration part Ha of the opening part fire prevention tool 1 and the outer peripheral surface of the cable K is compressed and deformed by radial elastic restoring force to radial direction. On the other hand, a portion that is not in contact with either the inner peripheral surface of the penetration portion H or the outer peripheral surface of the cable K, or a portion that is in contact with one of the inner peripheral surface of the penetration portion H or the outer peripheral surface of the cable K (non-clamping portion) 2f) is not subjected to compressive force, and the non-clamping part 2f is not compressed and deformed at all. Therefore, the clamping part 2e is in contact with the inner peripheral surface of the through-hole H and the outer peripheral surface of the cable K, and the non-clamping part 2f is kept as close as possible to the inner peripheral surface of the penetration part H and the outer peripheral surface of the cable K, and it is suppressed that a gap is formed in the opening Ha.

(I) Use example 2
The example of use shown in FIG. 8 and FIG. 9 opens to the opening Ha between the inner peripheral surface of the rectangular through-hole H formed on the wall W for a large number of cables K and the outer peripheral surface of the large number of cables K. A plurality of fire protection devices 1 are provided to close or substantially close the opening Ha, and the fire protection device 1 is formed in a single size that is easy to handle corresponding to the vertical and horizontal dimensions of the opening Ha. The insertion port 3A is provided at the end in the width direction.

  First, the opening portion fire prevention device 1 is sequentially inserted into the opening portion Ha from the outside with the insertion port 3A facing outward, and is disposed in the opening portion Ha (state of FIG. 8). At this time, the opening fire protection device 1 is not sandwiched between the inner peripheral surface of the through portion H and the outer peripheral surface of the cable K, but the outer surface and the inner peripheral surface of the through portion H or the outer peripheral surface of the cable K. The position is kept as much as possible by the frictional resistance.

Next, the fasteners 3B of the bag bodies 3 of all the opening fire prevention devices 1 are opened and operated. Since the insertion port 3A is arranged in a state in which the outside is desired, the opening operation of the fastener 3B of the insertion port 3A can be easily performed.
By this opening operation, the sealing of the bag body 3 is released, and the heat-expandable refractory material 2 is automatically elastically restored in the radial direction of the penetrating body as the capacity of the bag body 3 increases as in the first use example. The opening Ha is closed or substantially closed (the state shown in FIG. 9).

  In addition, after restoring the volume of the heat-expandable refractory material 2 elastically similarly to the usage example 1, the fastener 3B is closed again, and the inside of the bag body 3 is sealed, thereby being deployed in the opening Ha. The thermal expansion refractory material 2 in the opened fire protection device 1 in a state where the thermal expansion refractory material 1 is prevented from getting wet, and the expected performance such as fire resistance performance and heat insulation performance due to the wetness of the thermal expansion refractory material 2 The decrease can be suppressed.

(C) Other usage examples In each of the above usage examples, the case where the penetration portion H is formed on the wall W has been described as an example. However, the present invention is applicable to the case where the penetration portion H is formed on the floor S. May be applied. In that case, before placing the opening fire protection device 1 in the opening Ha, as shown in FIG. 10, the U-shaped receiving metal 5 is provided in the opening Ha so that the gravity of the opening fire protection device 1 can be reduced. You may make it suppress the position shift by.

  In the above-described use example 2, the opening fire protection device 1 is formed in an appropriate size that is easy to handle with respect to the opening Ha between the rectangular through portions H for the numerous cables K and the numerous cables K. However, as shown in FIG. 11, the opening portion fire prevention measure is formed by forming the opening portion Ha in two sizes corresponding to the short piece length and the long side length. The number of tools 1 used may be reduced to shorten the opening fire prevention process.

[Another embodiment]
(1) In the above-described embodiment, the refractory material restoring means in the first characteristic configuration of the present invention and the switching means in the second characteristic configuration have been described by taking the fastener 3B that can open and close the insertion portion 3A as an example. As the refractory material restoring means, if the sealing of the bag body 3 can be released and the thermally expandable refractory material 2 can be elastically restored, such as a notch for easily breaking the sealed bag body 3 Any configuration may be used, and as the switching means, the bag body 3 is in a sealed state and a sealable state, such as a fitting hole formed in the bag body 3 and a fitting protrusion capable of sealing the fitting hole. Any configuration may be used as long as it can be switched.

(2) In the above-described embodiment, the case where the refractory material restoring means and the fastener 3B as the switching means are provided has been described as an example. However, in the implementation of the sixth characteristic configuration of the present invention, the fastener 3B. Is not particularly necessary, as long as the bag body 3 can be easily unsealed by punching or tearing.

(3) In the above-described embodiment, the thermally expandable refractory material 2 is configured by laminating a plurality of thermally expandable refractory sheets 2A made of the same material, but a plurality of types of sheets composed of different types of materials. May be laminated.

(4) In the above-described embodiment, the outer surface of the bag 3 is embossed to form a rough surface, but it is not necessary to make the entire outer surface rough, and the inner peripheral surface of the penetrating body during use, Or the part of the part which touches the outer peripheral surface of the cable K should just be a rough surface.

(5) In the above-described embodiment, the sealing of the bag body 3 is released by configuring the maximum capacity of the bag body 3 containing the thermally expandable refractory material 2 to be larger than the volume of the thermally expandable refractory material 2. The case where the volume of the thermally expandable refractory material 2 in a volume reduced state is sometimes completely restored has been described as an example, but the maximum capacity of the bag 3 is the thermal expandability in the volume reduced state. As long as it is larger than the volume of the heat-expandable refractory material 2 in the volume-reduced state, it may be configured in any capacity so that the refractory material 2 can be elastically restored.

(6) In the above-described embodiment, the case where the heat-expandable refractory material 2 is configured so as to have flexibility capable of bending deformation and elasticity that can be elastically compressed has been described as an example. In the implementation of the first, second, third, fifth, and sixth feature configurations, it is not always necessary to have flexibility that allows bending deformation.

Top view of the opening fire protection device of the present invention Length direction (penetrating body circumferential direction) side cross-sectional view (cross-sectional view taken along the line II in FIG. 1) of the opening fire prevention device of the present invention Longitudinal side cross-sectional view showing a state where the volume of the thermally expandable refractory material is elastically restored Width direction (through body length direction) side cross-sectional view (cross-sectional view taken along the line II-II in FIG. 1) of the opening fire prevention device of the present invention Cross-sectional side view in the width direction showing the state in which the volume of the thermally expandable refractory material is elastically restored The front view which shows the state which has arrange | positioned the opening part fire-protection tool in the opening part in the usage example 1 The front view which shows the state which elastically restored the thermally expansible fireproof material of the opening part fire prevention tool in the usage example 1 The front view which shows the state which has arrange | positioned the opening part fire prevention tool in the opening part in the usage example 2 The front view which shows the state which elastically restored the thermally expansible refractory material of the opening part fire prevention measure tool in the usage example 2 Illustration of another use example The front view which shows the state which elastically restored the thermally expansible refractory material of the opening part fire prevention tool in another use example

Explanation of symbols

W wall (compartment)
S floor (compartment)
H Through part Ha Opening part K Cable (penetrating body)
1 Opening Fire Protective Tool 2 Thermally Expandable Refractory Material 2l Length in Length (Peripheral Circumferential Length)
2D sheet lamination thickness (penetrating body radial length)
2A Thermal expansion fireproof sheet 3 Bag body (flexible airtight bag)
3l Length in the length direction (Penetration body circumferential length)
3B fastener (refractory material restoration means, switching means)
3f Convex part (rough surface)

Claims (6)

An opening fire prevention device provided at an opening between a penetrating portion of a partition body and a penetrating body inserted through the partitioning portion,
The heat-expandable refractory material that can be elastically compressed to the volume-reduced state in the radial direction of the penetrating body at the time of deployment to the opening is possible in a state where it is constrained to the volume-reduced state by deaeration of air in the bag in a sealed state. A refractory material restoring means for elastically restoring the volume of the heat-expandable refractory material within the maximum capacity range of the flexible air-tight bag by disclosing the sealing of the flexible air-tight bag while being housed in the flexible air-tight bag Opening fire protection device provided with.   The opening fire prevention device according to claim 1, wherein the refractory material restoring means is a switching means for switching the flexible airtight bag between a sealed state and a sealed release state.   The opening according to claim 1 or 2, wherein at least a part of the outer surface of the flexible airtight bag is formed with a through portion of the partition body and a rough surface capable of suppressing sliding or sliding with respect to the through body. Department fire protection equipment.   The thermally expandable refractory material is configured by laminating flexible thermally expandable fireproof sheets in the radial direction of the through body, and the length of the flexible airtight bag in the circumferential direction of the flexible body is the thermal expansion. The opening part fire prevention tool of any one of Claims 1-3 currently formed in the length larger than the penetration body circumferential direction length of a refractory fireproof material.   After arranging the opening part fire prevention device of the division body of Claims 1-4 in the said opening part, the volume of the heat-expandable refractory material in the opening part fire prevention device of the said division body is elastically restored, and the said opening Opening fire prevention method that closes or closes the part. A fire-resistant measure for an opening portion, in which a thermally expandable refractory material that is elastically compressible in a volume-reduced state is housed in a flexible air-tight bag in a state of being restrained in the volume-reduced state by deaeration of air in the bag in a sealed state The maximum capacity range of the flexible airtight bag is released by releasing the sealing of the flexible airtight bag after the tool is disposed in the opening between the penetrating portion of the partitioning body and the through body inserted therethrough An opening fire prevention method that closes or substantially closes the opening by elastically restoring the volume of the thermally expandable refractory material in the radial direction of the through body.

Images