JP6654049B2 - Flameproof sheet and fire spread prevention method using flameproof sheet - Google Patents

Description

  The present invention relates to a flameproof sheet and a method for preventing spread of fire using the flameproof sheet.

  Conventionally, in the event of a fire around a facility that stores objects to be protected from spreading fire (also called fire spread) such as cultural properties, the objects to be protected are transported one by one from the facility to ensure safety. It was necessary to evacuate to a suitable place. When the number of objects to be protected is large, it takes time to evacuate the objects to be protected, so that the damage may be increased while the objects are being carried out.

  In this case, it is conceivable to spray water with a sprinkler facility or the like to prevent the spread of fire. The cultural property may be damaged or deteriorated, resulting in water damage.

  Therefore, a sheet having a water-absorbing polymer layer is placed on the object to be protected, and the water-absorbing polymer absorbs water to form a water-containing layer. 2. Description of the Related Art Flameproof sheets that prevent the spread of articles are known (see Patent Documents 1 and 2).

Japanese Patent Application No. 2000-70395 Japanese Patent Application No. 2000-317005

The conventional flameproof sheet has the following problems.
(1) It takes a certain amount of time for the water-absorbing polymer to absorb the amount of water necessary to sufficiently prevent the spread of fire on the object to be protected. Therefore, if the spread of fire is rapid, the spread of fire on the object to be protected cannot be prevented. there is a possibility.

  (2) As a practical problem, when there are many objects to be protected or when they are stored at a plurality of places, it is considered that a certain amount of water is sprayed to make the water absorbent polymer absorb water. However, at this time, water that has not been absorbed by the water-absorbing polymer layer may flow down to the floor of the facility, and water may enter the sheet from the gap between the floor and the sheet, causing damage to the object to be protected. There is.

  Therefore, an object of the present invention is to provide a flameproof sheet and a fire spread prevention method that can more reliably prevent fire damage to the protected object such as a cultural property while preventing water damage to the protected object.

The present invention is a flameproof sheet used by spraying a fire-resistant gel having thixotropic properties on the surface, wherein the projections are provided on the surface so that a gap is formed between a plurality of projections. The gap, when the fire-resistant gel is sprayed on the flame-proof sheet, the fire-resistant gel can be held in the gap , the projections fasten the fire-resistant gel to the surface, A flameproof sheet provided for forming a fireproof gel layer .

  Further, the present invention provides a step of covering the object to be protected with the flameproof sheet, a step of spraying a fireproof gel having thixotropic properties toward the surface of the flameproof sheet in a sol state, and Holding the gel in the gap of the flame sheet in a gel state and forming a fire gel layer on the surface of the flame sheet.

  In the flameproof sheet of the present invention, the protrusions may be arranged such that the protrusions and the gaps are alternated. Further, in the flameproof sheet of the present invention, a receiving portion may be formed at a tip portion of the projection.

  The method for preventing fire spread of the present invention can include a step of forming the fire-resistant gel containing sodium silicate and forming a fire-resistant layer on the surface of the flame-proof sheet. Further, the method for preventing fire spread according to the present invention can include a step of forming an air layer between the fire-resistant layer and the fire-resistant gel layer.

  In the present invention, the “projection” includes a projection-like protrusion that is a portion that remains as a result of being removed as a result of, for example, cutting, and the “gap” is formed with the protrusion. At this time, for example, a concave portion which is a portion removed by cutting is also included.

  According to the present invention, projections are provided on the surface of the flameproof sheet, and the fire-prevention gel can be held in the gap between the projections. Therefore, when a fire occurs around the object to be protected, the fire-prevention gel having thixotropic properties can be prevented. When sprayed toward the flame sheet, the fire-resistant gel is retained on the surface of the flame-proof sheet in a gel state having a high viscosity, and a fire-resistant gel layer can be formed on the surface.

  Therefore, after covering an object to be protected, such as a cultural property, with a fireproof sheet, the surface of the fireproof sheet is covered with a fireproof gel by spraying a fireproof gel in a sol state, and a gel fireproof gel layer is formed on the surface. It is possible to form. Therefore, it is possible to more quickly protect the object to be protected from the spread of fire.

  Also, even if the fire protection gel may flow down to the floor, the fire prevention gel is in a gel state having a high viscosity due to its thixotropy and has a low fluidity, so that the object to be protected, or The surrounding objects can be prevented from being damaged by water.

It is the schematic which shows the fire spread prevention method in 1st and 2nd embodiment of this invention, and is a figure which shows a mode that a fire protection gel is sprayed toward a flameproof sheet. FIG. 4 is a schematic view showing a method for preventing fire spread in the first and second embodiments of the present invention, showing a state in which a fire protection gel is sprayed toward a flameproof sheet, showing another aspect different from FIG. 2. . FIG. 3 is a front view showing the flameproof sheet according to the first and second embodiments of the present invention. FIG. 4 is a front view showing the flameproof sheet according to the first and second embodiments of the present invention, and is a view showing another aspect different from FIG. 3. It is an expanded sectional view showing a flameproof sheet in a 1st embodiment of the present invention. It is an expanded sectional view showing a flameproof sheet in a 2nd embodiment of the present invention.

  A first embodiment of the present invention will be described with reference to FIGS. First, a method for preventing fire spread according to the present embodiment will be described. The type of the object to be protected 1 to be protected from the spread of fire by the method for preventing spread of fire is not particularly limited. Cultural assets and electric / electronic devices.

  (1) The object to be protected 1 is covered with a flameproof sheet 2 in advance or when a fire occurs around a section where exhibition, installation, storage, or the like is performed. At this time, it is preferable to cover the entirety of the protection target 1 with the flameproof sheet 2 as much as possible.

  (2) And, it is connected to a supply source of the fire prevention gel 6 such as a sprinkler 4 (see FIG. 1) and a nozzle 5 (see FIG. 2) provided in the ceiling portion 3 of the section, for example, a tank 11 or the like. The fire prevention gel 6 is sprayed toward the flameproof sheet 2 by the spraying means.

  The fire protection gel 6 contains thixotropic agents such as water and colloidal hydrated silicates (smectite, minerals such as bentonite and montmorillonite, or inorganic polymer compounds similar thereto), and has thixotropic properties. For this reason, since the fire-proof gel 6 is in a low-viscosity sol-like state due to the stress at the time of spraying, the fire-proof gel 6 can be quickly sprayed toward the surface of the flameproof sheet 2. . In addition, it is possible for the fire prevention gel 6 to appropriately contain sodium silicate in addition to the thixotropic agent.

  (3) The sprayed fire-resistant gel 6 gradually becomes a highly viscous gel on the surface of the flame-proof sheet 2 due to its thixotropy, and forms a fire-resistant gel layer 7 so as to cover substantially the entire surface (see FIG. 5). reference). The fire prevention gel layer 7 prevents the heat of the fire from being conducted into the flame prevention sheet 2 due to evaporation of the water contained in the fire prevention gel 6, and protects the protection target 1 from spreading.

  In parallel with the step (3), even if part of the fire protection gel 7 falls on the floor 9 in the step (2), the fire protection gel 7 that has fallen on the floor 9 also has high viscosity. Since the gel is in the gel state, the fire prevention gel is prevented from entering the flame prevention sheet 2.

  (4) When the fire protection gel 6 contains sodium silicate, the water contained in the fire protection gel 6 evaporates due to the heat of the fire, and sodium silicate or the like foams. Layer 8 is formed (see FIG. 5). By forming the refractory layer 8, the object 1 to be protected can be protected from the spread of fire even after the moisture has evaporated.

  Next, a specific configuration of the flameproof sheet 2 will be described. The flameproof sheet 2 preferably includes a sheet body 2a formed of a fire-resistant, non-combustible or flame-retardant material, and a plurality of protrusions 2b formed over the entire surface of the sheet body 2a. .

  The protrusion 2b is disposed on the surface of the flameproof sheet 2 so that a gap 2c is formed between the protrusions 2b, 2b. The fireproof gel 6 is fixed to the surface of the fireproof sheet 2 in a gel state. 7 is provided. The spacing, density, and the like of the projections 2b are appropriately selected within a range in which the fire protection gel 6 can enter the gap 2c and the fire protection gel 6 can be held in the gap 2b.

  The arrangement of the projections 2b can be appropriately selected. However, it is preferable that the projections 2b are arranged on the surface of the flameproof sheet 2 so that the projections 2b and the gaps 2c are alternately arranged. By doing so, in the step (2), the protrusion 2b can prevent the fire-prevention gel 6 from flowing down (dropping) in the direction of gravity G (in the direction of the floor surface 9) and be orthogonal to the direction of gravity G. The horizontal movement can be restricted by the projection 2b, and the fire prevention gel 6 can be more reliably held in the gap 2c.

  In addition, since the shape of the protection target 1 is various, the protrusions 2b can be arranged on a lattice as shown in FIG. Further, for example, in a case where the flameproof sheet 2 can cover the object to be protected 1 such that the central portion 2f is located at the top, the protrusions 2b are arranged concentrically as shown in FIG. Can also.

  The shape and length of the projections 2b are appropriately determined as long as the fire-resistant gel 6 can be held on the surface of the flame-proof sheet 2 so that the fire-resistant gel layer 7 having a thickness necessary for preventing the spread of the object 1 to be protected can be secured. Although selectable, it is preferable that at least the facing surface 2d facing the gravitational direction G when the flameproof sheet 2 covers the protection target 1 is substantially flat.

  A second embodiment of the present invention will be described with reference to FIGS. The difference from the first embodiment is that the protrusion 2b of the flameproof sheet 2 is formed so as to be longer than the required thickness of the fire-proof gel layer 7 and is formed in a substantially hook shape. That is, the receiving portion 2e is formed. The rest is the same as in the first embodiment, and a description thereof will be omitted.

  In the present embodiment, the projection 2b is formed in a substantially hook shape, and a receiving portion 2e is formed at the tip thereof. By doing so, in the present embodiment, it is possible to prevent the fire-proof gel 6 from overflowing outside the protrusion 2b of the flame-proof sheet 2 in the step (2).

  In the present embodiment, the protrusion 2b is formed so that its length is longer than the required thickness of the fire-resistant gel layer 7. By doing so, in the method for preventing fire spread of the present embodiment, the fire prevention gel layer 7 having a necessary thickness is formed in the step (2) even if a margin is provided at the tip side of the projection 2b. It becomes possible.

  In the step (4), the refractory layer 8 forms the silicon contained in the fire protection gel 6 from the portion where the moisture of the fire protection gel layer 7 evaporates due to the heat of the fire, particularly from the surface portion of the fire protection gel layer 7. Sodium acid foaming starts and is gradually formed. At this time, in this embodiment, since the fire prevention gel layer 7 is formed with a margin at the tip side of the projection 2b, the fire prevention gel layer is formed. The refractory layer 8 formed on the surface portion of the projection 7 moves to the tip side of the projection 2b so as to float.

  As a result, an air layer 10 is formed between the fire-proof gel layer 7 and the fire-resistant layer 8. That is, the method for preventing fire spread of the present embodiment can further include a step of forming the air layer 10, and the air layer 10 serves as a heat insulating layer, and the heat of the fire is conducted into the flameproof sheet 2. This can be prevented.

  As described above, the present invention has been described based on the above embodiments. However, the present invention is not limited to the above embodiments, and can be appropriately changed without changing the gist of the invention. For example, the sheet body 2a of the flameproof sheet 2 is required to have flexibility, whereas the projection 2b is required to support the fire protection gel 6 and thus needs rigidity rather than flexibility. .

  In such a case, the sheet body 2a and the projection 2b of the flameproof sheet 2 are made of different materials, for example, the sheet body 2a is made of a flexible soft resin, and the projection 2b is made of a material having lower flexibility than the resin. By molding with a hard resin, a composite material, a metal, or the like, it is possible to appropriately adjust the flexibility of the sheet body 1 and the protrusions 2b.

  When the object 1 to be protected is covered with the flameproof sheet 2, each object 1 to be protected may be covered as in the above embodiment, but a plurality or all the objects 1 to be protected may be covered together. Alternatively, it is also possible to prevent the spread of fire on the protection target 1 by covering a certain section of the protection target 1 itself. Then, a protrusion 2b may be formed on the back surface of the flameproof sheet 2 so that the flameproof sheet 2 can be used reversibly. Further, the sheet main body 2a of the flameproof sheet 2 may have water absorbency.

DESCRIPTION OF SYMBOLS 1 Protective object 2 Flameproof sheet 2a Sheet main body 2b Projection 2c Gap 2d Opposing surface 2e Receiving part 2f Center part 3 Ceiling part 4 Sprinkler 5 Nozzle 6 Fireproof gel 7 Fireproof gel layer 8 Fireproof layer 9 Floor surface 10 Air layer 11 Tank G Gravity direction

Claims (4)

A fireproof sheet used by being sprayed with fireproof gel having thixotropic properties on the surface,
The projections are provided on the surface such that a gap is formed between the plurality of projections,
The gap is capable of holding the fire protection gel in the gap when the fire protection gel is sprayed on the flameproof sheet ,
The flameproof sheet, wherein the protrusion is provided to fix the fireproof gel to the surface and form a fireproof gel layer .   2. The flameproof sheet according to claim 1, wherein the protrusions are arranged such that the protrusions and the gap are alternately arranged. 3.   3. The flameproof sheet according to claim 1, wherein the protrusion has a receiving portion formed at a distal end thereof. 4. A step of covering an object to be protected with the flameproof sheet according to any one of claims 1 to 3,
Spraying a fire-resistant gel having thixotropic properties in a sol state toward the surface of the flameproof sheet,
Holding the fire-resistant gel in a gel state in the gap of the flame-proof sheet, and forming a fire-resistant gel layer on the surface of the flame-proof sheet.

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