JP7399703B2 - Fireproof sheathing material, beam reinforcement metal fittings, fireproof sheathing retaining structure, and construction method of fireproof structure - Google Patents

Description

The present invention relates to, for example, a fireproof coating placed on a beam having a through hole, a beam reinforcing metal fitting using the same, a fireproof coating holding structure, and a method for constructing a fireproof structure.

Steel beams of building structures lose their strength when exposed to high temperatures due to fire, etc. To avoid this, it is necessary to spray the beams with a fire-resistant material such as rock wool to a predetermined thickness to cover them.

As a steel beam coated with such a fireproof coating, for example, a steel beam has been proposed in which a part of the flange part is coated with a thermally expandable fireproofing material, and other parts are covered with a sprayed fireproofing material (patented). Reference 1).

On the other hand, a through hole is generally formed in the beam to allow piping, wiring, etc. to pass therethrough. When spraying refractory material onto a beam with a through-hole, it is necessary to cover the inner circumferential surface of the through-hole with refractory material, so the thickness of the refractory material coating should be determined based on the outside diameter of the pipes, etc. to be installed. It is necessary to increase the size of the through hole accordingly.

FIG. 11 is a sectional view showing a conventional fireproof structure 100. A through hole 109 through which the pipe 105 is inserted is formed in the web 103a of the beam 103. Note that wiring may be used instead of piping. The flange 103b and web 103a of the beam 103 are covered with sprayed refractory material 107. Since the sprayed refractory material 107 needs to have a predetermined thickness in order to obtain fireproof performance, the through hole 109 is set to be larger than the outer diameter of the pipe 105 by the thickness of the sprayed refractory material 107. Therefore, there is a risk that the strength of the beam will decrease.

On the other hand, as a fireproof structure for a beam having a through hole, a method has been proposed in which a thermally expandable sheet is arranged on the inner peripheral surface of the through hole (Patent Document 2).

Japanese Patent Application Publication No. 2017-128844 Japanese Patent Application Publication No. 2007-198029

In this way, when constructing a fire-resistant structure using spray-on fireproofing materials, by placing other fire-resistant covering materials in advance in some areas, the fire-resistant structure becomes more can be made thinner. Therefore, in places where it is desired to reduce the thickness of the refractory material, it is advantageous to use other fire-resistant coating materials instead of spray-on refractory materials.

However, even if the fireproofing material is placed in the desired location, there is a risk that it may fall off or become misaligned during the spraying or preparation of the sprayed fireproofing material. If the fireproof coating material falls off or becomes misaligned, it becomes necessary to reposition the fireproof coating material at a predetermined location. Furthermore, when spraying the fireproofing material, the work efficiency is poor, as the operator must hold down the fireproofing material while performing the work.

The present invention was made in view of these problems, and it is possible to securely hold the fireproof coating and obtain good workability when placing the fireproof coating in, for example, a through hole of a beam. The purpose of this invention is to provide a fireproof covering material and beam reinforcing metal fittings using the same.

In order to achieve the above-mentioned object, a first invention includes a flexible fireproof material and an adhesive material provided on the fireproof material, and the adhesive material is attached to a target part by the adhesive material. The adhesive material may be a magnet, and the magnets may be arranged at predetermined intervals along the longitudinal direction of the refractory material .
A second invention includes a flexible refractory material and an adhesive provided on the refractory material, and can be attached to a target part with the adhesive, and the adhesive material is The fireproof covering material is a suction cup, and the suction cups are arranged at predetermined intervals along the longitudinal direction of the fireproof material.
A third invention includes a flexible fireproof material and an adhesive provided on the fireproof material, the adhesive can be attached to a target part, and the adhesive is It is a double-sided tape or adhesive, and the double-sided tape or adhesive is arranged along the longitudinal direction of the refractory material, and the adhesive material extends on both sides in the width direction perpendicular to the longitudinal direction of the refractory material. A fire-resistant covering material characterized in that it is placed at a location.

The target part is a through hole formed in a beam, and the adhesive material is arranged along the longitudinal direction of the refractory material, and the adhesive material is arranged along the longitudinal direction of the refractory material, and the adhesive material is attached to the refractory material along the inner surface of the through hole or the inner surface of the beam reinforcing metal fitting. It is desirable that it be possible to paste the

It is desirable that the fireproof material has a core material and a coating material that covers the core material.

According to the 1-3 aspect of the invention, since the fireproof coating material has the adhesive material disposed on the flexible fireproof material, the fireproof coating material can be easily attached to the fireproof target part. Therefore, it is possible to suppress the fireproof covering material from falling off or shifting from the target area. For this reason, for example, even when spraying the fireproof material to a region other than the area where the fireproof covering material is placed, the fireproof covering material can be reliably held in a predetermined position.

In particular, a greater effect can be obtained when the fireproof coating is placed on the inner circumferential surface of the through hole formed in the beam.

Further, if the adhesive material is a magnet or a suction cup, the fireproof coating material can be easily attached to a steel beam or the like.

Moreover, if the adhesive material is double-sided tape or adhesive, the structure is simple and a low-cost fireproof covering material can be obtained.

At this time, by placing double-sided tape adhesive magnets or suction cups on both sides of the fireproof material in the width direction perpendicular to the longitudinal direction, the fireproof covering material can be easily fixed to the side surfaces of the steel beams, etc. This makes the work easier.

Moreover, if the refractory material has a core material and a coating material that covers the core material, it is possible to suppress damage to the refractory material during handling. Furthermore, the covering material can improve the shape retention of the core material, such as a fire-resistant wool material or a thermally expandable material.

A fourth invention is a beam reinforcing metal fitting for reinforcing a beam having a web having a through hole formed therein, which has the fireproof covering material according to the first to third inventions, wherein the main body is disposed in the through hole. The beam reinforcing metal fitting is characterized in that the beam reinforcing metal fitting includes a section and the fireproof covering material disposed on the inner circumferential surface of the main body section.

According to the fourth invention, since the fireproof covering material is pasted on the inner peripheral surface of the beam reinforcing metal fittings in advance, the fireproof structure can be achieved by simply welding the beam reinforcing metal fittings to the beams and spraying the sprayed fireproofing material onto the beams. can be obtained.

A fifth invention is a fireproof coating retaining material structure using the fireproof coating material according to the first to third inventions, wherein the fireproof coating retainer structure uses the fireproof coating material according to the first to third inventions, and the structure is such that a through hole formed in a beam or an inner surface of a beam reinforcing metal fitting fixed to the through hole , the fireproof covering material holding structure is characterized in that the fireproof covering material is arranged, the parts projecting on both sides of the fireproof covering material are bent and attached to the outer periphery of the through hole or the beam reinforcing metal fittings.

A sixth invention is a method for constructing a fire-resistant covering structure using the fire-resistant covering material according to the first to third inventions, the method comprising: covering the inner surface of a through hole formed in a beam or the inner surface of a beam reinforcing metal fitting; A method for constructing a fire-resistant structure , comprising the steps of: arranging the fire-resistant coating on the beam; and spraying a spray-on fire-resistant material onto the outer peripheral surface of the beam.

According to the fifth and sixth inventions, it is possible to easily obtain a fireproof coating holding structure and a fireproof structure.

According to the present invention, a fire-resistant coating material that can reliably hold the fire-resistant coating material and obtain good workability when placing the fire-resistant coating material in, for example, a through hole of a beam, and a beam using the same are provided. Reinforcement fittings can be provided.

FIG. 2 is a front view showing the fireproof covering material holding structure 10. FIG. 5 is a diagram showing a fireproof covering material 5, in which (a) is a plan view and (b) is a cross-sectional view taken along the line BB in (a). (a) is a cross-sectional view of the fireproof covering material holding structure 10, which is a cross-sectional view taken along the line AA in FIG. 1, and (b) is a cross-sectional view of the fireproof structure 1. FIG. 3 is a perspective view of a beam reinforcing metal fitting 11. FIG. 3 is a partial cross-sectional view of the beam reinforcing metal fitting 11. (a) is a sectional view of the fireproof covering material holding structure 10a, and (b) is a sectional view of the fireproof structure 1a. A cross-sectional view of the fireproof structure 1b. A plan view showing a fireproof covering material 5a. A cross-sectional view of the fireproof structure 1c. A plan view showing a fireproof covering material 5b. FIG. 1 is a cross-sectional view showing a fireproof structure 100.

(First embodiment)
Embodiments of the present invention will be described below. FIG. 1 is a front view showing a fireproof covering material holding structure 10 according to a first embodiment. The fireproof covering material holding structure 10 has a fireproof covering material 5 held in a through hole 9 formed in a beam 3. In addition, in the following description, an example will be shown in which the target part in the fireproof sheathing material holding structure 10 where the fireproof sheathing material 5 is arranged is the through hole 9 formed in the beam 3. It is also possible to arrange and hold 5.

The beam 3 is composed of a so-called H-beam steel in which a pair of flanges 3b are connected by a web 3a. A through hole 9 through which a pipe or the like is inserted is formed in the web 3a. A fireproof covering material 5 is disposed on the inner peripheral surface of the through hole 9 over substantially the entire circumference so as to cover the inner surface of the through hole 9.

FIG. 2(a) is a plan view of the fireproof covering material 5, and FIG. 2(b) is a sectional view taken along the line BB in FIG. 2(a). The fireproof covering material 5 includes a fireproof material 6c and an adhesive material 6d provided on the fireproof material 6c. The fireproof material 6c is made of a flexible flame retardant or noncombustible material. In this embodiment, the adhesive material 6d is a double-sided tape, and the adhesive material 6d is arranged along the longitudinal direction of the fireproof material 6c. The refractory material 6c can be attached to the target part using the adhesive material 6d. Note that an adhesive may be applied instead of the double-sided tape, but in the following description, an example using the double-sided tape will be described.

As shown in FIG. 2(b), the refractory material 6c includes a core material 6a and a covering material 6b that covers the core material 6a. The core material 6a can be made of a fire-resistant wool material such as glass wool, a thermally expandable material, or the like. The covering material 6b can be applied as long as it is a sheet-like member that has a certain degree of strength and fire resistance, but for example, by applying an aluminum-coated glass cloth sheet, etc., the fire-resistant covering material 5 can have a certain degree of shape retention. can be obtained. However, the invention is not limited to this embodiment, and any embodiment may be used as long as the fireproof covering material can be disposed over substantially the entire circumference so as to cover the inner surface of the through hole or the like. For example, the refractory material 6c may be comprised only of the core material 6a.

FIG. 3(a) is a cross-sectional view of the fireproof covering material holding structure 10, and is a cross-sectional view taken along the line AA in FIG. The fireproof coating material 5 is rolled up and placed inside the through hole 9 so that the adhesive material 6d is on the outer peripheral side, and the fireproof material 6c is pasted on the inner peripheral surface of the through hole 9 using the adhesive material 6d. can be pasted along the inner surface of the through hole 9. At this time, by making the length of the fireproof sheathing material 5 (fireproof material 6c) substantially the same as the inner peripheral length of the through hole 9, the fireproof sheathing material 5 is made to be approximately the same as the inner peripheral length of the through hole 9. can be placed.

In this state, the adhesive material 6d of the fireproof covering material 5 is pasted on the inner surface of the through hole 9, and the fireproof covering material 5 is held in the through hole 9, so that subsequent spraying work of the fireproof material and its During preparation, it is possible to prevent the fireproof covering material 5 from falling off or shifting from the through hole 9.

Next, a method of constructing a fireproof covering structure using the fireproof covering material 5 will be explained. First, the fireproof covering material 5 is placed on the inner peripheral surface of the through hole 9 formed in the beam 3. At this time, the adhesive material 6d of the fireproof covering material 5 is pasted on the inner surface of the through hole 9. Next, a fireproof material is sprayed onto the outer peripheral surface of the beam 3.

FIG. 3(b) is a sectional view showing a fireproof structure 1 in which sprayed fireproofing material 7 is sprayed on the outer periphery of the beam 3. In the fireproof structure 1, since the fireproof coating material 5 is arranged, the sprayed fireproof material 7 is not necessary on the inner peripheral surface of the through hole 9. In addition, since the fireproof performance of the fireproof sheathing material 5 (core material 6a) can be improved compared to the sprayed fireproofing material 7, when the sprayed fireproofing material 7 is formed on the inner peripheral surface of the through hole 9 (dotted line). In comparison, the thickness of the fireproof structure can be reduced. Therefore, the size of the through hole 9 can be made smaller than the outer diameter of the pipe or the like inserted through the through hole 9.

As described above, according to the first embodiment, since the adhesive material 6d is attached to the fireproof material 6c, the fireproof covering material 5 can be easily installed, for example, on the inner surface of the through hole 9 of the beam 3. It can be pasted and fixed. Therefore, the fireproof covering material holding structure 10 can suppress the falling off or displacement of the fireproof covering material 5 during work. Therefore, subsequent construction of the sprayed refractory material 7 is easy, and the fireproof structure 1 can be easily obtained.

In addition, since the core material 6a of the fireproof material 6c is covered with the covering material 6b, for example, when the core material 6a is made of fireproof wool material, damage to the wool material and generation of dust during handling can be suppressed. In addition, it is possible to suppress itching caused to the worker by fine fiber debris. Therefore, it is easy to handle. Further, if the covering material 6b is metal-coated glass cloth or the like, it has some shape retention property, so that when the fireproof covering material 5 is deformed, its shape is maintained. Therefore, even when the fireproof covering material 5 is arranged in a rounded manner on the inner surface of the through hole 9, for example, the fireproof covering material 5 itself maintains its rounded shape, and displacement and falling off can be more reliably suppressed.

(Second embodiment)
Next, a second embodiment will be described. FIG. 4 is a perspective view showing the beam reinforcing metal fitting 11, and FIG. 5 is a partial cross-sectional view of the beam reinforcing metal fitting 11. In the following description, the same components as the fireproof covering material holding structure 10 and the fireproof structure 1 are given the same reference numerals as those in FIGS. 1 to 3, and redundant description will be omitted.

In this embodiment, a beam reinforcing metal fitting 11 is used for reinforcing the beam 3 in which the through hole 9 is formed in the web 3a. As described above, when the through hole 9 is formed in the beam 3, the bending strength of the beam 3 is reduced due to the through hole 9. The beam reinforcing metal fitting 11 is a member for preventing the bending strength of the beam 3 from decreasing.

The beam reinforcing metal fitting 11 has a main body 12 fixed to the web 3a and a fireproof coating 5 disposed on the inner circumferential surface of the main body 12. The main body portion 12 is, for example, a member made of metal such as steel or stainless steel. The main body portion 12 is a ring-shaped member as a whole, and has a piping hole through which piping and the like pass. A fireproof covering material 5 is disposed on the inner circumferential surface of the main body part 12 over substantially the entire circumference so as to cover the inner surface of the main body part 12 . At this time, the adhesive material 6d is attached to the inner circumferential surface of the main body portion 12.

FIG. 6(a) is a diagram showing the fireproof covering material holding structure 10a. The fireproof covering material holding structure 10a is substantially the same as the fireproof covering material holding structure 10, but differs in that a beam reinforcing metal fitting 11 is fixed to the through hole 9 by welding.

When using the beam reinforcing metal fittings 11, the beam reinforcing metal fittings 11 are first placed and fixed inside or outside of the through holes 9 formed in the beams 3. Note that the fireproof covering material 5 may be attached to the beam reinforcing fittings 11 in advance, or the fireproof coating material 5 may be attached to the inner surface of the beam reinforcing fittings 11 after the beam reinforcing fittings 11 are fixed. good. From this state, the sprayed fireproofing material 7 is applied to the outer peripheral surfaces of the beam 3 and the beam reinforcing metal fittings 11, thereby obtaining the fireproof structure 1a shown in FIG. 6(b). Note that when using the beam reinforcing metal fitting 11, the main body 12 of the beam reinforcing metal fitting 11 itself also needs to be coated with fireproof coating, but in this embodiment, the inner peripheral surface of the main body 12 is coated with a fireproof coating material 5. It is located. Therefore, similarly to the fireproof structure 1, the fireproof structure 1a does not require the sprayed fireproof material 7 on the inner peripheral surface of the beam reinforcing metal fittings 11.

According to the second embodiment, effects similar to those of the first embodiment can be obtained. In this way, by using the beam reinforcing metal fittings 11, the beam 3 can be reinforced. At this time, by using the beam reinforcing metal fittings 11 provided with the fireproof coating 5, the fireproof structure 1a can be easily obtained.

(Third embodiment)
Next, a third embodiment will be described. FIG. 7 is a sectional view showing the fireproof structure 1b. The fireproof structure 1b has almost the same configuration as the fireproof structure 1a, but differs in that a fireproof coating 5a is used. In addition, in the following embodiment, an example in which the beam reinforcing metal fitting 11 is used will be described, but the fireproof coating material may be directly fixed to the inner surface (web 3a) of the through hole 9 without using the beam reinforcing metal fitting 11. . In addition, all of the fireproof structures shown below are constructed by applying a sprayed fireproof material to a fireproof covering material holding structure (not shown) that holds a fireproof covering material on the inner surface side of the through hole 9.

FIG. 8 is a plan view showing the fireproof covering material 5a. The fireproof coating material 5a differs from the fireproof coating material 5 in that an adhesive material 6e is used instead of the adhesive material 6d. The adhesive material 6e is a suction cup, and the suction cups are arranged at predetermined intervals along the longitudinal direction of the fireproof material 6c.

As shown in FIG. 7, the fireproof coating material 5a is rolled up with the adhesive material 6e facing outward, and placed on the inner peripheral surface of the main body part 12 of the beam reinforcing metal fitting 11, and the fireproof coating material is coated on the inner surface of the main body part 12 with a suction cup. By fixing the material 5a, the fireproof covering material 5a can be fixed to the beam 3.

According to the third embodiment, the same effects as the second embodiment can be obtained. In this way, the attachment means may be a suction cup or the like instead of double-sided tape.

(Fourth embodiment)
Next, a fourth embodiment will be described. FIG. 9 is a sectional view showing the fireproof structure 1c. The fireproof structure 1c has substantially the same configuration as the fireproof structure 1a, but differs in that a fireproof coating 5b is used.

FIG. 10 is a plan view showing the fireproof covering material 5b. The fireproof coating material 5b differs from the fireproof coating material 5 in that an adhesive material 6g is used instead of the adhesive material 6d. The fireproof covering material 5b has a plurality of arm portions 6f arranged at predetermined intervals in the longitudinal direction so as to protrude from both sides in the width direction perpendicular to the longitudinal direction of the fireproof material 6c. The arm portion 6f is made of, for example, a flexible member such as glass cloth.

The adhesive material 6g is disposed near the tip of each arm 6f, and is disposed at a position projecting on both sides in the width direction perpendicular to the longitudinal direction of the refractory material. That is, the adhesive materials 6g are arranged at predetermined intervals along the longitudinal direction of the fireproof material 6c. In this embodiment, an example is shown in which the adhesive material 6g is a magnet, but it may also be the aforementioned suction cup, double-sided tape, or the like.

As shown in FIG. 9, the fireproof covering material 5b is rolled up and placed on the inner circumferential surface of the main body part 12 of the beam reinforcing metal fitting 11, and a pair of arms 6f facing each other in the width direction are bent outward. Then, the web 3a or the main body part 12 of the beam reinforcing metal fitting 11 is sandwiched between the arm parts 6f. At this time, since the adhesive material 6g is placed on the web 3a of the arm portion 6f or the surface facing the main body portion 12 of the beam reinforcing metal fitting 11, it is possible to The fireproof covering material 5a can be fixed by pasting the overhanging portion to the outer periphery of the through hole 9 or the beam reinforcing metal fitting 11 with adhesive 6g.

According to the fourth embodiment, effects similar to those of the second embodiment and the like can be obtained. In this way, by disposing the sticking means on the arm portion 6f that protrudes in the width direction of the refractory material 6c, and bending the arm portion 6f toward the web 3a (main body portion 12), the through hole 9 and the main body portion 12 can be fixed. Even if there is not enough space on the inner surface, the fireproof covering material 5b can be reliably fixed to the inner surface of the through hole 9.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention is not limited to the embodiments described above. It is clear that those skilled in the art can come up with various changes and modifications within the scope of the technical idea stated in the claims, and these naturally fall within the technical scope of the present invention. It is understood that it belongs.

For example, it goes without saying that the configurations described above can be combined with each other.

1, 1a, 1b, 1c... Fireproof structure 3... Beam 3a... Web 3b... Flange 5, 5a, 5b... Fireproof coating material 6a... Core material 6b...... Coating material 6c... Fireproof materials 6d, 6e, 6g... Adhesive material 6f... Arm portion 7... Sprayed fireproof material 9... Through holes 10, 10a... Fireproof covering material holding structure 11... ...Beam reinforcing metal fittings 12...Body portion 100...Fireproof structure 103...Beam 103a...Web 103b...Flange 105...Piping 107...Sprayed fireproofing material 109...Through hole

Claims (8)

A flexible fireproof material;
An adhesive provided on the fireproof material,
The adhesive material can be applied to the target area ,
The fireproof covering material is characterized in that the adhesive material is a magnet, and the magnets are arranged at predetermined intervals along the longitudinal direction of the fireproof material . A flexible fireproof material;
An adhesive provided on the fireproof material,
The adhesive material can be applied to the target area ,
The fireproof covering material is characterized in that the adhesive material is a suction cup, and the suction cups are arranged at predetermined intervals along the longitudinal direction of the fireproof material . A flexible fireproof material;
An adhesive provided on the fireproof material,
The adhesive material can be applied to the target area ,
The adhesive material is a double-sided tape or adhesive, and the double-sided tape or adhesive is arranged along the longitudinal direction of the fireproof material,
The fireproof covering material is characterized in that the adhesive material is disposed at a position extending from both sides in a width direction perpendicular to the longitudinal direction of the fireproof material . The target portion is a through hole formed in a beam,
The adhesive material is arranged along the longitudinal direction of the fireproof material,
The fireproof coating material according to any one of claims 1 to 3, wherein the fireproof material can be attached along the inner surface of the through hole or the inner surface of the beam reinforcing metal fitting. The fireproof covering material according to any one of claims 1 to 4 , wherein the fireproofing material has a core material and a covering material that covers the core material. A beam reinforcing metal fitting for reinforcing a beam having a fireproof covering material according to any one of claims 1 to 5 and having a through hole formed in the web,
a main body disposed in the through hole;
the fireproof covering material disposed on the inner circumferential surface of the main body;
A beam reinforcing metal fitting characterized by comprising: A fireproof coating holding material structure using the fireproof coating material according to claim 3 ,
The fireproof covering material is arranged on the inner surface of a through hole formed in a beam or a beam reinforcing metal fitting fixed to the through hole,
A fireproof covering material holding structure characterized in that portions of the fireproof covering material that protrude on both sides are bent and attached to the outer periphery of the through hole or the beam reinforcing metal fittings. A method for constructing a fireproof coating structure using the fireproof coating material according to any one of claims 1 to 5 , comprising:
arranging and pasting the fireproof covering material so as to cover the inner surface of the through hole formed in the beam or the inner surface of the beam reinforcing metal fitting;
Spraying a sprayed fireproofing material onto the outer peripheral surface of the beam;
Equipped with
The adhesive material is disposed at a position protruding from both sides in a width direction perpendicular to the longitudinal direction of the refractory material,
After arranging the fireproof covering material, the projecting parts on both sides of the fireproof covering material are bent, and the projecting parts are attached to the outer periphery of the through hole or the beam reinforcing metal fittings.

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