JP2003129587A - Refractory plate, and decorative refractory cover structure for steel column using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refractory plate which is impervious to being chipped at its acute angle portion formed near a bottom of a kerf, when a rear surface thereof is V-grooved to form the kerf for folding or during transportation thereof to the construction field or short transportation in the field, and to provide a decorative refractory cover structure for a steel column, which can be constructed in a short time with high efficiency by using the refractory plate. SOLUTION: The refractory plate A is formed by sticking paper 3 to the entire front surface of a calcium silicate board 1 by means of a synthetic resin adhesive 2, and forming the V-shaped kerf 4 for folding in the rear surface thereof. An area along the kerf 4 is impregnated with a synthetic resin 5 such as an acrylic resin, from a front surface of the board 1 to the depth of the same before formation of the kerf 4. The refractory plate A thus formed is folded along the kerf 4, and inner surfaces of the kerf 4 are bonded to each other by an inorganic adhesive 8 to form a corner portion of a refractory cover layer 7, followed by applying a decorative finish layer 11 to the paper 3 forming a front surface of the refractory cover layer 7, by painting. In this manner, the decorative refractory cover structure for the steel column is obtained.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fireproof plate (calcium silicate plate) and a fireproof plate attached to the periphery of a steel column to form a rectangular tubular fireproof coating layer, and the surface of the fireproof coating layer is painted. The present invention relates to a decorative fireproof coating structure for a steel column having a decorative finish layer.

[0002]

2. Description of the Related Art A refractory plate having a V-shaped bending groove formed on a back surface and a vinylon mesh attached on the front surface so as to be located across the cutting groove is used. Is bent at the kerf and the inner surfaces of the kerf are adhered to each other with an adhesive to form a corner portion of a rectangular tubular fire-resistant coating layer. It is already known from Japanese Patent No. 228741.

This prior art is a technique relating to the invention of the present inventor, and is excellent in that the corners of the square tubular fireproof coating layer can be improved in their streets and the street correction work by sanding can be omitted. Although it has advantages, there are unsolved problems in the following points.

That is, the refractory plate is an inorganic plate material (calcium silicate plate) containing silicic acid and lime as main components, which is manufactured by a batch or continuous papermaking method, and has a temperature of 800 to 9 degrees Celsius.
It has excellent fire resistance that can withstand a temperature of 00 degrees for a long time.
It has many advantages such as light weight, almost no shrinkage due to drying, good workability due to effective nailing, etc.
Since it is a plate material having a cross-sectional structure with many voids of about 0.35, it has the characteristics of low strength and high water absorption,
The above-mentioned conventional example has the following problems.

Since the strength of the refractory plate (calcium silicate plate) is weak, when the vinylon mesh is adhered to the surface of the refractory plate, the back surface is V-cut to form a kerf for bending, and The sharp edges of the fire-resistant plate formed near the bottom are liable to be chipped, and even if the kerf can be formed with high precision, the strength is low, so it may come into contact with other objects during transportation to the construction site or during small transportation at the site. Therefore, there is a high possibility that the acute angle portion will be lost. Further, even after the construction, the corner portion of the fireproof coating layer formed in a rectangular tubular shape is easily broken due to contact with another object, and in order to prevent this, reinforcement of the corner portion by a corner bead is required. Needed. Since there are many voids and high water absorption, it is necessary to apply a sealer (primer treatment) to the entire surface when applying a makeup finish to the surface of the fireproof coating layer by applying paint, Moreover, since the surface strength of the fire-resistant plate is weak, the surface of the fire-resistant plate may peel off due to cracks in the paint unless it is reinforced by applying a gauze cloth. A lot of field work is essential. Since the coating is applied on the ginseng, it is necessary to prepare a thick groundwork to eliminate the unevenness due to the texture of the ginseng. As a result of the above, the construction efficiency is poor, the construction period is long, and the overall cost is high.

[0006]

DISCLOSURE OF THE INVENTION The present invention is an improvement and development of the above points, and its purpose is to form a kerf for bending by V-cutting the back surface. , A fire-resistant plate that does not easily lack sharp edges formed near the bottom of the kerf during transportation to the construction site or during small-scale transportation at the site, and decorative fire resistance of steel columns that can be efficiently used in a short time using it Providing a coating structure.

[0007]

The technical means taken by the present invention to solve the above problems are as follows. That is, in the fire-resistant plate according to the invention of claim 1, paper is attached to the entire surface of the calcium silicate plate with a synthetic resin adhesive,
A V-shaped bending groove is formed on the back surface, and a synthetic resin such as an acrylic resin is impregnated from the surface to the inside of the wall at a position along the groove, prior to the formation of the groove. It is characterized by that.

According to the above construction, since the paper is adhered to the entire surface of the calcium silicate board with the synthetic resin adhesive, the synthetic resin adhesive enters the voids of the cross sectional structure of the calcium silicate board, A water-blocking film that prevents the absorption of moisture is formed on the surface of the calcium silicate plate, and the water absorption inherent to the calcium silicate plate is reduced on the surface side. As a result, when applying a makeup finish by paint application, the work of applying a sealer (primer treatment) to prevent the absorption of moisture becomes unnecessary.

Moreover, since the calcium silicate plate in this portion is reinforced by impregnating the position where the kerf of the calcium silicate plate is to be formed with a synthetic resin such as acrylic resin in advance from the surface to the inside of the wall thickness, the calcium silicate plate in this portion is reinforced. When forming a kerf by V-cutting from the back surface side to the front surface of the calcium silicate plate, an accurate V-shaped cutting can be performed without cutting off the acute angle part of the calcium silicate plate formed near the bottom of the kerf. Grooves can be formed.

Further, during transportation to the construction site or during small transportation at the site, even if it comes into contact with other objects, the sharp corners are less likely to be damaged, and after the construction, the fireproof coating layer formed in a rectangular tube shape is formed. Even if the corner portion comes into contact with another object, the corner portion is unlikely to be broken, so that the corner portion does not need to be reinforced.

According to the second aspect of the present invention, there is provided a makeup refractory coating structure for a steel column, a fireproof plate is attached to the periphery of the steel column to form a rectangular tubular fireproof coating layer, and the surface of the fireproof coating layer is painted to make up the finish. A decorative fireproof coating structure of a steel column in which a layer is formed, and as the fireproof plate, paper is attached to the entire surface of a calcium silicate plate with a synthetic resin adhesive, and V
A kerf for bending in the shape of a letter is formed, and at the position along the kerf, a fire-resistant plate made of synthetic resin such as acrylic resin is impregnated from the surface to the inside of the wall thickness prior to the formation of the kerf. Paper used to form the corners of the fire-resistant coating layer by bending the fire-resistant plate with the kerf and adhering the inner surfaces of the kerf to each other with an inorganic adhesive to form the surface of the fire-resistant coating layer. The feature is that it is given a makeup finish by painting.

According to the above construction, since the acute-angled portion of the calcium silicate plate formed near the bottom of the kerf is reinforced by impregnation with a synthetic resin such as acrylic resin, the fireproof coating formed in a rectangular tube shape. Even if the corner portion of the layer comes into contact with another object, it is not easily broken, and it is not necessary to reinforce the corner portion with a corner bead.

Since the synthetic resin adhesive for sticking paper forms a water-blocking film on the surface of the calcium silicate plate to prevent the absorption of moisture, it has hitherto been performed before the makeup finish by painting. There is no need for the work of applying a sealer (primer treatment) on the entire surface to prevent moisture from being sucked in.

Since the surface of the calcium silicate plate is reinforced by the paper attached to the surface of the calcium silicate plate, the surface portion of the calcium silicate plate will not be peeled off due to the crack of the paint that has been finished with the makeup, and the reinforcement by the application of cold gauze Is unnecessary.

Since the paint applied to the paper adhered to the surface of the calcium silicate plate is applied, it is not necessary to adjust the thick base to eliminate the unevenness due to the texture of the gauze, which is the case when the paint is applied on the gauze. is there.

As described above, it is not necessary to reinforce the corners with the corner beads, apply a sealer to prevent suction, reinforce with a gauze paste, or adjust the thick base to eliminate the unevenness due to the texture of the gauze. Therefore, the work on site is small, and the decorative fireproof coating structure of steel columns can be efficiently constructed in a short period of time, and the overall cost can be reduced.

[0017]

1 and 2 show an example of a fireproof plate A according to the present invention. In the figure, reference numeral 1 is a calcium silicate plate, on the surface of which a paper 3 is attached over the entire surface by a synthetic resin adhesive 2 capable of forming a water-blocking film a for preventing the absorption of moisture. Has been done. Paper 3
As the material, kraft paper having a flat surface (for example, the same kraft paper used for general gypsum board) is used. On the back surface of the calcium silicate plate 1, an arbitrary number (two in the illustrated example) of V-shaped bending grooves 4 for bending are formed at predetermined bending positions. At positions along these kerfs 4, the kerfs 4
Prior to the formation of, the synthetic resin 5 is impregnated from the surface to the inside of the wall thickness. The synthetic resin 5 to be impregnated may be vinyl acetate or the like, but acrylic resin is used in this example.

In the figure, T is the thickness of the calcium silicate plate 1, L ₁ is the width with which the synthetic resin 5 is impregnated, and L ₂ is the depth with which the synthetic resin 5 is impregnated. 1a and 1b are acute-angled portions of the calcium silicate plate 1 formed near the bottom of the kerf 4.

The refractory plate A is manufactured by the following method. First, as shown in FIG. 3A, a specific gravity of 0.2 to 0.35, a thickness T of, for example, 40 mm, and a width of, for example, manufactured by a conventional method (batch type or continuous type papermaking method) are used. Calcium silicate plate with a length of 1000 mm and a length of 3000 mm (an inorganic plate material containing silicic acid and lime as main components) 1
Only on the surface of the surface where the kerf 4 is to be formed,
As shown in (b) of FIG. 3, an emulsion of the synthetic resin 5 or a solution of an organic solvent or the like is sprayed over a width L _{1 of} about 50 mm to impregnate the inside of the wall thickness to a depth L _{2 of} about 10 mm to form a kerf. 4 is reinforced with a synthetic resin 5 in a strip shape along a position where it is to be formed (in a strip shape parallel to the longitudinal direction of the calcium silicate plate 1).

It is also possible to reinforce the entire surface of the calcium silicate plate 1 by spraying and impregnating the entire surface of the calcium silicate plate 1 with an emulsion of the synthetic resin 5 or a solution of an organic solvent. Since it is sprayed and impregnated only on the position where the resin is to be formed, the amount of the synthetic resin 5 used and the drying treatment time are short, which is economical. It is desirable that the synthetic resin 5 to be impregnated is colored in a color different from that of the calcium silicate plate 1 so that the surface reinforced by the impregnation can be visually confirmed.

Thereafter, as shown in (c) and (d) of FIG. 3, the entire surface of the calcium silicate plate 1 is hardened to prevent moisture from being absorbed (voids in the cross-sectional structure of the calcium silicate plate 1). The paper 3 is attached by a synthetic resin adhesive 2 capable of forming a water-impervious film a that enters into and fills the void near the surface. In this case, in the example shown,
Since the surface of the calcium silicate plate 1 is colored in a band shape by the impregnated synthetic resin 5, it is easy to visually check the front surface and the back surface, and the paper 3 is stuck on the back surface by mistake. Can be prevented.

Next, as shown in FIG. 3 (e), a predetermined position on the back surface of the calcium silicate plate 1 is V-cut in a state where the paper 3 remains, and a kerf 4 for bending is formed, Figure 1,
The refractory plate A of FIG. 2 is manufactured. In this case, since the position where the kerf 4 of the calcium silicate plate 1 is to be formed is previously reinforced with the synthetic resin 5 impregnated from the surface to the inside of the wall thickness, V from the back surface side of the calcium silicate plate 1 to the surface. When cutting to form the kerf 4, the V-shaped kerf 5 is formed accurately without the sharp corners 1a and 1b of the calcium silicate plate 1 formed near the bottom of the kerf 4 being chipped. be able to. In addition, since the fire-resistant plate A manufactured in this way is unlikely to be damaged by the acute-angled portions 1a and 1b even if it comes into contact with another object during transportation to the construction site or during small transportation on the site, it will be described later. As described above, after the construction, even if the corner portion of the fireproof coating layer formed in the shape of a rectangular tube comes into contact with another object, it is not easily broken and the corner bead does not need to be reinforced.

Next, a decorative fireproof coating structure of a steel frame column using the above fireproof plate A will be described with reference to the drawings.

FIGS. 4 to 6 show a decorative fireproof coating structure for steel columns according to the present invention. In the figure, 6 is a steel column, 7 is
Two pieces formed in a U-shaped cross section by bending the steel column 6 around the kerf 4 and adhering the inner surfaces of the kerf 4 to each other with an inorganic adhesive 8 containing sodium silicate as a main component. It is a rectangular tube-shaped fireproof coating layer formed by attaching the fireproof plate A. 9 is a spacer (a small piece of calcium silicate plate) adhered to the steel column 7, and the fireproof plate A is fixed to the spacer 9 with nails 10.

As shown in FIG. 6, the corner portions of the refractory coating layer 7 have acute-angled portions 1a, 1 of the calcium silicate plate 1 reinforced by impregnation with a synthetic resin 5 such as acrylic resin or vinyl acetate.
b is bonded and configured. Therefore, the fireproof coating layer 7
Even if the corners of the corners come into contact with other objects, they are not easily broken, and reinforcement of the corners by the corner beads is unnecessary.

The opposite end faces of the fire-resistant plate A are also adhered by the inorganic adhesive 8 containing sodium silicate as a main component.
Specifically, the inorganic adhesive 8 is filled up in the spacers 9 corresponding to the gaps between the facing end faces, and the refractory plate A is pushed in to fill the gaps between the end faces with the inorganic adhesive 8.

The surface of the fireproof coating layer 7 is formed by the paper 3 attached to the surface of the fireproof plate A.
The makeup finishing layer 11 is formed by directly applying paint to the above. In this case, as shown in FIG. 6, on the surface of the calcium silicate plate 1, a synthetic resin adhesive 2 for adhering the paper 3 is formed with a water-blocking film a for preventing moisture from being absorbed. Conventionally, the work (primer treatment) of applying a sealer for preventing the absorption of moisture, which has been performed before the makeup finish by painting, is unnecessary. Moreover, the surface of the calcium silicate plate 1 is reinforced by the paper 3 attached to the surface of the calcium silicate plate 1, and the surface portion of the calcium silicate plate 1 is prevented from peeling off due to the cracks of the paint that has been finished with makeup. No need for reinforcement. Further, since the paint is applied on the paper 3, in other words, on a flat surface, it is not necessary to adjust the thick base to eliminate the unevenness due to the texture of the kansai such as when applying the paint on the kansai. .

Therefore, reinforcement of the corner portion by the corner bead, application of a sealer for preventing suction, reinforcement by sticking a gauze cloth, and adjustment of a thick base for eliminating unevenness due to the texture of the gauze cloth are omitted. Therefore, the work on site can be reduced, so that the decorative fireproof coating structure of the steel column can be efficiently constructed in a short period of time, and the total cost can be reduced.

FIG. 7 shows another embodiment of the present invention, in which two refractory plates A formed in a U-shaped cross section and two refractory plates A ₁ formed in two strips. , A ₂ form a rectangular tubular fireproof coating layer 7 surrounding the steel column 6. Since these strip-shaped fire-resistant plates A ₁ and A ₂ are fire-resistant plates that constitute the plane portion of the square-tube fire-resistant coating layer 7, they have the kerf 4 and the synthetic resin (acrylic resin, vinyl acetate, etc.). ) 5 is different from the refractory plate A only in that there is no reinforcement by impregnation, and a synthetic resin-based adhesive capable of forming a water-blocking film a for preventing moisture absorption by hardening on the surface. The paper 3 is attached by the agent 2. Fireproof plate A ₁ ,
As A ₂ , for example, one obtained by cutting a part of the fireproof plate A into a strip plate can be used. Other configurations and operations are shown in FIG.
The description is omitted because it is the same as the embodiment of FIG.

According to the above construction, since the fireproof plate A of a fixed length can be used for the large-diameter steel frame column 6, material loss is reduced and it is economical.

As is clear from the above examples, the decorative fireproof coating structure for a steel column according to the present invention uses the fireproof plate A according to claim 1 and uses the fireproof coating layer 7 in the shape of a rectangular tube to form the corner portions. It is sufficient if the structure is used, and the case where the rectangular tubular fireproof coating layer 7 is formed only by the fireproof plate A that is bent at the kerf 4, and the case where the fireproof plate A that is bent at the kerf 4 and the strip plate shape without the kerf 4 are formed There is also a case where the fireproof coating layer 7 having a rectangular tubular shape is formed by combining with a fireproof plate, and the invention is not limited to either one.

[0032]

Since the present invention has the above-mentioned structure,
When forming a kerf for bending by V-cutting the back surface, or during transportation to a construction site or small transportation at the site, a fire-resistant plate that is hard to chip off the acute-angled part formed near the bottom of the kerf can be obtained. Since there is no need to reinforce the corners with the corner beads, apply a sealer to prevent suction, reinforce with a gauze paste, and adjust the thick base to eliminate irregularities due to the weave of the gauze, there is less on-site work Thus, there is an effect that the decorative fireproof coating structure of the steel column can be efficiently constructed in a short period of time.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a fireproof plate according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part.

FIG. 3 is a cross-sectional view illustrating a method for manufacturing a fireproof plate.

FIG. 4 is a perspective view illustrating a decorative fireproof coating structure for a steel column according to the present invention.

FIG. 5 is a cross-sectional plan view of a decorative fireproof coating structure for a steel column according to the present invention.

FIG. 6 is an enlarged cross-sectional view of a main part.

FIG. 7 is a cross-sectional plan view of a decorative fireproof coating structure for a steel column showing another example.

[Explanation of symbols]

A ... Fireproof plate, 1 ... Calcium silicate plate, 2 ... Synthetic resin adhesive, 3 ... Paper, 4 ... Grooves, 5 ... Synthetic resin, 7 ... Fireproof coating layer, 11 ... Makeup layer by painting.

Claims (2)

[Claims] 1. A paper is adhered to the entire surface of a calcium silicate plate with a synthetic resin adhesive, a V-shaped bending kerf is formed on the back surface, and a kerf is formed at a position along the kerf. Prior to forming the groove, a fire-resistant plate characterized by being impregnated with a synthetic resin such as acrylic resin from the surface to the thick inside. 2. A decorative fireproof coating structure for a steel column in which a fireproof plate is attached around the steel column to form a rectangular tubular fireproof coating layer, and a decorative finish layer is formed on the surface of the fireproof coating layer by painting. As the refractory plate, paper is attached to the entire surface of a calcium silicate plate with a synthetic resin adhesive, and a V-shaped bending kerf is formed on the back surface, and a position along the kerf is formed. A refractory plate formed by impregnating a synthetic resin such as an acrylic resin from the surface to the inside of the wall thickness is used prior to forming the kerf, and the refractory plate is bent at the kerf, and The corners of the fire-resistant coating layer are formed by adhering the inner surfaces to each other with an inorganic adhesive, and the paper forming the surface of the fire-resistant coating layer is given a decorative finish by painting to make the steel column Decorative fireproof coating structure.