JP3198416U - Fireproof coating structure - Google Patents

Abstract

Provided is a covering structure that obtains stable fire resistance at a joint portion between a first member selected from columns and beams and a second member selected from columns, beams and walls. The present invention relates to a fireproof covering structure at a joint portion between a first member 1 selected from columns and beams and a second member 2 selected from columns, beams and walls. The first member is a foamable fireproof sheet 3. The foamable refractory putty 4 is filled from the end of the foamable refractory sheet on the first member to the surface of the second member. Preferably, the foamable refractory sheet is a thermoplastic foamable refractory sheet and the foamable refractory putty is a solvent-type foamable refractory putty. [Selection] Figure 1

Description

The present invention relates to a novel fireproof covering structure.

  When a structure such as a building or a civil engineering structure is exposed to a high temperature due to a fire or the like, there is a problem that the physical strength of a steel frame constituting a column, a beam, or the like rapidly decreases. On the other hand, there is known a fireproof coating structure in which a steel frame is covered with a fireproof coating material, and the temperature rise of the steel frame during a fire is delayed to suppress a decrease in physical strength of the steel frame.

As such a fireproof coating structure, fireproof coating with a dry sheet such as a foamable fireproof sheet or an inorganic fiber sheet is performed. This is a method in which a dry sheet prepared in advance is coated on a steel frame, and in recent years, construction on a part that has aesthetics or design is desired. As such a dry-type sheet | seat, the foamable fireproof sheet like patent document 1 is employ | adopted, for example. The foamable refractory sheet is suitable because it can easily cover the entire steel frame and can exhibit excellent fire resistance.

JP-A-7-310379

  However, in the part where the pillar or beam covered with the foamable fireproof sheet joins with other members (for example, the joint between the pillar and beam, the pillar and wall, the beam and wall, etc.), the sheet completely covers the steel frame. There is a risk that a gap will occur without being covered, and there is also a risk that dripping, peeling, etc. will occur.

The present invention relates to a member such as a column or a beam covered with a foamable fireproof sheet, and an object thereof is to improve the covering structure at a joint portion between the member and another member and obtain stable fire resistance.

  As a result of intensive studies to achieve the above object, the inventor has conceived a specific fireproof covering structure using a foamable fireproof sheet and a foamable fireproof putty, and completed the present invention.

That is, the fireproof covering structure of the present invention has the following characteristics.
1. A fireproof covering structure at a joint portion between a first member selected from columns and beams and a second member selected from columns, beams and walls,
The first member is covered with a foamable fireproof sheet,
A fireproof covering structure filled with a foamable fireproof putty from the end of the foamable fireproof sheet on the first member to the surface of the second member.
2. When the first member is a column, the second member is a beam or a wall,
When the first member is a beam, the second member is a column or a wall. The fireproof coating structure described.
3. The foamable fireproof sheet is a thermoplastic foamable fireproof sheet,
The foamable fire-resistant putty is a solvent-type foamable fire-resistant putty. The fireproof coating structure described.

Above 1. ~ 3. In the device according to the above, it is possible to prevent the foamable fireproof sheet from being rolled or peeled off at the joint portion between the member such as a column or a beam and another member, and to obtain stable fire resistance.
In particular, the above 3. In the device according to the above, the end portion of the foamable refractory sheet and the foamable refractory putty are fused to obtain a more stable fire resistance.

It is a perspective view which shows an example of this invention fireproof covering structure. It is the front view which expanded FIG. 1-A part. It is a figure which shows another example of FIG. It is a figure which shows another example of this invention fireproof covering structure.

  Hereinafter, the form for implementing this invention is demonstrated.

The present invention relates to a fireproof covering structure at a joint. Specifically, it is a fireproof covering structure at the joint between a first member selected from pillars and beams and a second member selected from pillars, beams and walls, and in particular, the first member is covered with a foamable fireproof sheet. The foamable fireproof putty material is filled from the end of the foamable fireproof sheet to the surface of the second member.

The first member selected from the columns and beams of the present invention, and the second member selected from the columns, beams and walls are generally limited as long as they are members generally used as building columns, beams and walls. Not. Examples of the pillar and beam include a wooden member, a steel member, a concrete member, or a combination of these, and the shapes thereof include a square shape, a round shape, an H shape, an I shape, and the like. Can be used. Moreover, the steel frame member can also use what carried out the antirust process. Moreover, as a wall, a wooden member, a gypsum board, a calcium silicate board, concrete, a PC board, an ALC board, a metal etc. are mentioned, for example.

FIG. 1 is a view showing an example of the fireproof covering structure of the present invention. FIG. 1 shows a fireproof covering structure in a joint portion between a beam 1 of a first member and a column 2 of a second member. The foamable fireproof sheet 3 is coated on the beam 1. The foamable refractory putty 4 is filled from the end of the column to the surface of the column 2. FIG. 2 is an enlarged front view of the portion of FIG.

The foamable refractory sheet 3 of the present invention foams when the ambient temperature reaches a predetermined foaming temperature due to a fire or the like, and forms a carbonized heat insulating layer. As the foamable refractory sheet 3, one containing a resin component, a flame retardant, a foaming agent, a carbonizing agent and a filler as a constituent component is suitable. Among these, as the resin component, for example, a thermoplastic resin such as an acrylic resin, as a flame retardant, ammonium polyphosphate, as a foaming agent, melamine, dicyandiamide, azodicarbonamide, etc., as a carbonizing agent, pentaerythritol, dipentayl. Examples of fillers such as erythritol include titanium dioxide, calcium carbonate, and inorganic fibers.

The blending ratio of each component is usually 200 to 600 parts by weight of a flame retardant, 40 to 150 parts by weight of a foaming agent, 40 to 150 parts by weight of a carbonizing agent, and a filler with respect to 100 parts by weight of the resin component in terms of solid content. It is preferable that it is 50-160 weight part.
The thickness of the foamable refractory sheet 3 may be appropriately set depending on the application site and the like, but is preferably about 0.2 to 10 mm, more preferably about 0.5 to 6 mm.

Moreover, although the foamable fireproof sheet 3 of this invention may be comprised only from the sheet | seat containing the said component, it is preferable that the fibrous sheet is laminated | stacked on the back surface (member side). Thereby, foaming by the side of the fibrous sheet of the foamable fireproof sheet 3 can be suppressed, and foaming can be performed only in one direction to form a carbonized heat insulating layer. Moreover, it is excellent in the fall-off prevention effect of the formed carbonized heat insulation layer.

Examples of such a fibrous sheet include a sheet containing organic fibers, inorganic fibers, and the like.
Examples of the organic fiber include pulp fiber, polyester fiber, polypropylene fiber, aramid fiber, vinylon fiber, polyethylene fiber, polyarylate fiber, PBO fiber, nylon fiber, acrylic fiber, vinyl chloride fiber, cellulose fiber, and their woven fabric. A cloth, a nonwoven fabric, etc. are mentioned. The organic fiber may be melted in a temperature range of about 150 ° C. to be in a liquid state, but is preferably not melted in such a temperature range.

Examples of the inorganic fiber include rock wool, glass fiber, silica fiber, silica-alumina fiber, carbon fiber, silicon carbide fiber, or the like, or woven fabric, nonwoven fabric, and the like, and fine metal wires such as iron and copper. Such an inorganic fiber does not melt even when heat is applied, acts as a reinforcing material, and can hold the foamed carbonized heat insulating layer, and therefore has an excellent effect of preventing the member from falling off. In particular, if the inorganic fiber has a network structure, the foamable refractory sheet 3 and the carbonized heat insulating layer formed by applying heat to the fireproof sheet 3 can be reinforced more efficiently, and the falling off from the member can be prevented. Is preferable.

The fibrous sheet is a composite sheet composed of inorganic fibers and organic fibers, wherein the inorganic fibers are arranged in a mesh pattern, and a woven or non-woven fabric of organic fibers is laminated on at least one side (one side), It is preferable that part or all of the network of inorganic fibers is closed with organic fibers. By combining the inorganic fiber and the organic fiber, the molten component due to heat is adsorbed, and peeling of the joint portion can be prevented. Moreover, if the mesh is closed with organic fibers, the network structure of the inorganic fibers is not easily broken during the production of the foamable refractory sheet 3 and can be easily manufactured.

The foamable fireproof putty 4 of the present invention is filled from the end of the foamable fireproof sheet 3 over the surface of the second member. Thereby, it is possible to prevent the end portion of the foamable fireproof sheet 3 from curling or peeling. As a result, stable fire resistance can be obtained. Further, the foamable refractory putty 4 has a polishing property and can be finished with good aesthetics.

The foamable refractory putty 4 of the present invention foams when the ambient temperature reaches a predetermined foaming temperature due to a fire or the like, and forms a carbonized heat insulating layer. As the foamable refractory putty 4, those containing the same components as the above-mentioned foamable refractory sheet 3 are suitable.

  The blending ratio of each component is preferably 200 to 600 parts by weight of a flame retardant, 40 to 150 parts by weight of a foaming agent, 40 to 150 parts by weight of a carbonizing agent, and filled with respect to 100 parts by weight of a resin component in terms of solid content. 50 to 160 parts by weight of the agent. The foamable refractory putty 4 of the present invention is a composition containing the above-described constituents, and its solid content and viscosity may be set as appropriate, but the viscosity is preferably about 50 Pa · s or more. By setting it as such a range, it becomes easy to be filled with the foamable fireproof putty 4 from the edge part of the foamable fireproof sheet 3 over the surface of the 2nd member.

Further, in the present invention, it is preferable to use the thermoplastic foamable fireproof sheet 5 and the solvent-type foamable fireproof putty 6 in combination. The thermoplastic foamable fireproof sheet 5 is a foamable fireproof sheet using a thermoplastic resin as a resin component. The solvent-type foaming refractory putty 6 is a foaming refractory putty containing a solvent. FIG. 3 shows another example of FIG. 2. Instead of the foamable refractory sheet 3 of FIG. 2, a thermoplastic foam refractory sheet 5 is replaced with a foamable refractory putty 4. A fireproof putty 6 is used. In this case, the end portion of the thermoplastic foamable refractory sheet 5 is dissolved by the solvent contained in the solvent-type foamable refractory putty 6. Thereby, the thermoplastic foamable fireproof sheet 5 and the solvent-type foamable fireproof putty 6 form a fusion part 7. In such an aspect, the thermoplastic foamable fireproof sheet 5 and the solvent-type foamable fireproof putty 6 are made into a seamless state by the fusion part 7, and more stable fire resistance is obtained.

The total solvent content contained in the solvent-type foaming refractory putty 6 is preferably 1% by weight or more and 30% by weight or less. Such a solvent-type foamed refractory putty 6 can be prepared using, for example, a solvent-type liquid resin as a binder component, or can be prepared by diluting a solventless liquid resin with a solvent. Solvents include aromatic hydrocarbon solvents such as toluene, xylene, solvent naphtha, n-hexane, n-pentane, n-octane, n-nonane, n-decane, n-undecane, n-dodecane, terpin oil, Examples include aliphatic hydrocarbon solvents such as mineral spirits, ethyl acetate, butyl acetate, methyl ethyl ketone, and methyl isobutyl ketone.

Another example of the fireproof covering structure of the present invention is shown in FIG.
FIG. 4 is a view showing another example of the steel fireproof covering structure of the present invention, which is a fireproof covering structure at a joint portion between the column 14 of the first member and the beam 24 of the second member. The foamable fireproof sheet 3 is covered, and the foamable fireproof putty 4 is filled from the end of the foamable fireproof sheet 3 to the surface of the beam 24.

The foamable fireproof sheet in the present invention may be coated on the first member via an adhesive. Examples of the adhesive include water-dispersed, water-soluble, and solvent-type adhesives mainly composed of acrylic resin, silicon resin, epoxy resin, vinyl resin, phenol resin, polyester resin, urethane resin, paraffin, etc. A well-known thing can be used. A flame retardant, a foaming agent, a carbonizing agent, a filler, etc. which are mix | blended with the foamable fireproof sheet 3 mentioned above can also be added to an adhesive material as needed. In the present invention, the adhesive includes an adhesive.

When the foamable refractory sheet 3 is provided on the first member via the adhesive, the foamable refractory sheet 3 can be laminated on the first member without a gap. As a result, the occurrence of defects such as swelling, floating and peeling of the foamable fireproof sheet 3 can be suppressed.

The fireproof covering structure of the present invention can be formed, for example, by the following method.
(1) Step of coating the first member with the foamable refractory sheet (2) Next, the step of filling the foamable refractory putty over the surface of the second member from the end of the foamable refractory sheet. ) After that, the foamable refractory putty material may be polished if necessary.

Moreover, when providing a foamable fireproof sheet through an adhesive material, in the above (1), a method of using a foamed fireproof sheet 3 previously coated with an adhesive material, or the above (1) Before the step, it may be performed by a method of applying an adhesive to the first member and / or the back side of the foamable refractory sheet.

  Examples are given below to clarify the features of the present invention.

(Foaming fireproof putty)
Mix 100 parts by weight of acrylic resin, 90 parts by weight of melamine, 90 parts by weight of dipentaerythritol, 400 parts by weight of ammonium polyphosphate, 130 parts by weight of titanium oxide, add xylene and stir well so that each component becomes uniform, A foaming refractory putty was obtained. This foamable refractory putty contains 18% by weight of a solvent.

(Foaming fireproof sheet)
A pressure kneader in which a mixture of 100 parts by weight of a thermoplastic resin (acrylic resin), 90 parts by weight of melamine, 90 parts by weight of dipentaerythritol, 320 parts by weight of ammonium polyphosphate, and 100 parts by weight of titanium oxide is set at 120 ° C. After preparing a kneaded product for a foamable fireproof sheet by laminating, a laminate of the kneaded material is laminated on a glass nonwoven fabric and processed into a sheet by a rolling roller to produce a foamable fireproof sheet (450 mm × 1200 mm) having a thickness of 1.5 mm. did.

(Fireproof coating structure)
As the base material, a steel structure in which beams and columns made of square steel (300 mm × 300 mm) were joined as shown in FIG. 1 was used. In addition, the beam and the column which applied the antirust primer beforehand were used. In addition, a ceramic fireproof coating material was applied to the surface of the column (second member).
An acrylic adhesive was applied to the beam (first member) of the base material with a thickness of 50 μm, and a foamable fireproof sheet was laminated. Subsequently, the foamable fire-resistant putty was applied with a trowel from the end of the foamable fire-resistant sheet to the surface of the column (second member) and filled. Thereafter, it was dried at a temperature of 20 ° C. and a relative humidity of 65% for 1 week to obtain a test specimen.

The prepared test specimen was subjected to a heating test for 1 hour in accordance with a standard heating curve of ISO834. As a result, no curling or peeling at the end of the foamable refractory sheet was observed, and a substantially uniform carbonized heat insulating layer was also formed at the joint, indicating good fire resistance.

1. First member (beam)
2. Second member (pillar)
3. 3. Expandable fireproof sheet 4. Expandable fireproof putty 5. Thermoplastic foamable fireproof sheet 6. Solvent-type foaming fireproof putty Fusion unit 14. First member (pillar)
24. Second member (beam)

Claims (3)

A fireproof covering structure at a joint portion between a first member selected from columns and beams and a second member selected from columns, beams and walls,
The first member is covered with a foamable fireproof sheet,
A fireproof covering structure filled with a foamable fireproof putty from the end of the foamable fireproof sheet on the first member to the surface of the second member. When the first member is a column, the second member is a beam or a wall,
The fireproof covering structure according to claim 1, wherein, when the first member is a beam, the second member is a column or a wall. The foamable fireproof sheet is a thermoplastic foamable fireproof sheet,
The fireproof covering structure according to claim 1, wherein the foamable fireproof putty is a solvent-type foamable fireproof putty.

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