JP2021095794A - Fire-resistive covering material, beam reinforcement metal fitting, fire-resistive covering material holding structure, and construction method of fire-resistant structure - Google Patents

Abstract

To provide a fire-resistive covering material and a beam reinforcement metal fitting using the same capable of reliably holding the fire covered covering material when placing the fire covered covering material in an open hole of a beam for example while ensuring satisfactory workability.SOLUTION: An open hole 9 is formed in a web 3a. A fire resistive covering material 5 is placed on the inner peripheral surface almost all around the open hole 9. The fire-resistive covering material 5 has a refractory material 6c and an adhesive material 6d provided to the refractory material 6c. The adhesive material 6d is a double-faced tape, and the adhesive material 6d is placed along the longer direction of the refractory material 6c. The fire-resistive covering material 5 is rolled and placed inside the open hole 9 with the adhesive material 6d at the outer circumference side. By adhering the refractory material 6c to the inner peripheral surface of the open hole 9 using the adhesive material 6d, the refractory material 6c can adhere along the inner face of the open hole 9. With this, falling off or displacement of the fire-resistive covering material 5 from the open hole 9 is prevented in the subsequent spraying work of the refractory material and its preparation.SELECTED DRAWING: Figure 3

Description

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

The proof stress of a steel beam of a building structure decreases when the temperature rises due to a fire or the like. In order to avoid this, it is necessary to cover the beam with a refractory material such as rock wool having a predetermined thickness.

As a steel beam with such a fireproof coating, for example, a steel beam in which a heat-expandable fireproof material is arranged in a part of a flange portion and the other part is covered with a spray fireproof material has been proposed (Patent). Document 1).

On the other hand, a through hole may be generally formed in the beam for passing pipes, wiring, and the like. When spraying a refractory material on a beam having a through hole, it is necessary to cover the inner peripheral surface of the through hole with the refractory material. It is necessary to increase the size of the through hole by that amount.

FIG. 11 is a cross-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. In some cases, wiring is used instead of piping. The flange 103b and the web 103a of the beam 103 are covered with the spray refractory material 107. Since it is necessary to secure a predetermined thickness of the sprayed refractory material 107 in order to obtain fire resistance, 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 of a beam having a through hole, a method of arranging a heat-expandable sheet on the inner peripheral surface of the through hole has been proposed (Patent Document 2).

JP-A-2017-128844 Japanese Unexamined Patent Publication No. 2007-198029

In this way, when constructing a fireproof structure using the sprayed fireproof material, by arranging another fireproof coating material in advance in a part thereof, the fireproof structure is compared with the case where the sprayed fireproof material is provided in the relevant portion. The thickness of the can be reduced. Therefore, in places where the thickness of the refractory material is desired to be reduced, a method of using another refractory coating material instead of the spray refractory material is useful.

However, even if the refractory coating material is placed at a desired location, it may fall off or be misaligned when the sprayed refractory material is sprayed or during the preparation thereof. If the refractory coating material falls off or is misaligned, it is necessary to relocate the refractory coating material in a predetermined place. Further, when spraying the refractory material, the workability is poor because the worker needs to perform the work while holding down the refractory coating material.

The present invention has been made in view of such a problem, and it is possible to reliably hold the refractory coating material and obtain good workability when, for example, arranging the refractory coating material in a through hole of a beam or the like. It is an object of the present invention to provide a fireproof coating material and a beam reinforcing metal fitting using the same.

In order to achieve the above-mentioned object, the first invention includes a flexible refractory material and a dressing provided on the refractory material, and can be attached to the target portion by the refractory material. It is a refractory coating material characterized by being.

The target portion is a through hole formed in the beam, the adhesive material is arranged along the longitudinal direction of the refractory material, and the refractory material is placed along the inner surface of the through hole or the inner surface of the beam reinforcing metal fitting. It is desirable that it can be pasted.

The sticking material is a magnet, and the magnets may be arranged at predetermined intervals along the longitudinal direction of the refractory material.

The sticking material is a suction cup, and the suction cups may be arranged at predetermined intervals along the longitudinal direction of the refractory material.

The sticking material is a double-sided tape or an adhesive, and the double-sided tape or the adhesive may be arranged along the longitudinal direction of the refractory material.

The sticking material may be arranged at positions overhanging on both sides in the width direction perpendicular to the longitudinal direction of the refractory material.

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

According to the first invention, since the adhesive material is arranged on the flexible fireproof material, the fireproof coating material can be easily attached to the fireproof target portion. Therefore, it is possible to prevent the fireproof coating material from falling off or slipping from the target portion. Therefore, for example, even when the refractory material is sprayed on a portion other than the portion where the refractory coating material is arranged, the refractory coating material can be reliably held at a predetermined position.

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

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.

Further, if the adhesive is a double-sided tape or an adhesive, a fireproof coating material having a simple structure and low cost can be obtained.

At this time, the refractory coating material can be easily fixed to the side surface of the steel frame beam by arranging the double-sided tape adhesive magnet or the suction cup at the positions protruding on both sides in the width direction perpendicular to the longitudinal direction of the refractory material. Because it can be done, the work is easy.

Further, if the refractory material has a core material and a coating material covering the core material, it is possible to prevent the refractory material from being damaged during handling or the like. Further, the covering material can enhance the shape retention of a core material such as a refractory wool material or a heat-expandable member.

The second invention is a beam reinforcing metal fitting for reinforcing a beam having a refractory coating material according to the first invention and having a through hole formed in a web, and a main body portion arranged in the through hole. The beam reinforcing metal fitting is provided with the fireproof coating material arranged on the inner peripheral surface of the main body portion.

According to the second invention, since the fireproof coating material is attached to the inner peripheral surface of the beam reinforcing metal fitting in advance, the fireproof structure is simply obtained by welding the beam reinforcing metal fitting to the beam and spraying the sprayed fireproof material onto the beam. Can be obtained.

A third invention is a fireproof coating holding material structure using the fireproof coating material according to the first invention, wherein the through hole formed in the beam or the inner surface of the beam reinforcing metal fitting fixed to the through hole is covered with the above. It is a fireproof coating material holding structure characterized in that a fireproof coating material is arranged, and portions protruding on both sides of the fireproof coating material are bent and attached to the outer peripheral portion of the through hole or the beam reinforcing metal fitting.

A fourth invention is a method for constructing a refractory coating structure using a refractory coating material according to the first invention, wherein the inner surface of a through hole formed in a beam or the inner surface of a beam reinforcing metal fitting is covered. A method for constructing a refractory structure, which comprises a step of arranging a refractory coating material and a step of spraying the refractory material on the outer peripheral surface of the front beam.

The adhesive material is arranged at a position overhanging on both sides in the width direction perpendicular to the longitudinal direction of the fireproof material, and after arranging the fireproof coating material, the overhanging portions on both sides of the fireproof coating material are bent to obtain the above. An overhanging portion may be attached to the outer peripheral portion of the through hole or the beam reinforcing metal fitting.

According to the third and fourth inventions, a fireproof coating holding structure and a fireproof structure can be easily obtained.

According to the present invention, when a refractory coating material is placed in a through hole of a beam, for example, the refractory coating material can be reliably held and good workability can be obtained, and a beam using the refractory coating material. Reinforcing metal fittings can be provided.

The front view which shows the refractory coating material holding structure 10. It is a figure which shows the refractory covering material 5, (a) is a plan view, (b) is a sectional view taken along line BB of (a). (A) is a cross-sectional view of the refractory coating material holding structure 10, FIG. 1 is a cross-sectional view taken along the line AA, and (b) is a cross-sectional view of the refractory structure 1. The perspective view of the beam reinforcing metal fitting 11. FIG. 3 is a partial cross-sectional view of the beam reinforcing metal fitting 11. (A) is a cross-sectional view of the fireproof coating material holding structure 10a, and (b) is a cross-sectional view of the fireproof structure 1a. Sectional drawing of fireproof structure 1b. The plan view which shows the refractory coating material 5a. Sectional drawing of fireproof structure 1c. The plan view which shows the refractory coating material 5b. FIG. 5 is a cross-sectional view showing a fireproof structure 100.

(First Embodiment)
Hereinafter, embodiments of the present invention will be described. FIG. 1 is a front view showing the refractory coating material holding structure 10 according to the first embodiment. The fireproof coating material holding structure 10 is a structure in which the fireproof coating material 5 is held in a through hole 9 formed in the beam 3. In the following description, in the fireproof coating material holding structure 10, the target portion where the fireproof coating material 5 is arranged is a through hole 9 formed in the beam 3, but the fireproof coating material is attached to the other target portion. It is also possible to arrange and hold the 5.

The beam 3 is made of so-called H-section 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 coating material 5 is arranged on the inner peripheral surface of the through hole 9 so as to cover the inner surface of the through hole 9 over substantially the entire circumference.

FIG. 2A is a plan view of the refractory covering material 5, and FIG. 2B is a sectional view taken along line BB of FIG. 2A. The refractory coating material 5 has a refractory material 6c and a sticking material 6d provided on the refractory material 6c. The refractory material 6c is composed of a flexible flame-retardant material or non-combustible material. In the present embodiment, the sticking material 6d is a double-sided tape, and the sticking material 6d is arranged along the longitudinal direction of the refractory material 6c. The refractory material 6c can be attached to the target portion by the attachment material 6d. 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. 2B, the refractory material 6c has a core material 6a and a covering material 6b that covers the core material 6a. As the core material 6a, a refractory wool material such as glass wool, a heat-expandable member, or the like can be applied. The covering material 6b can be applied as long as it is a sheet-like member having a certain degree of strength and fire resistance. For example, by applying an aluminum-coated glass cloth sheet or the like, the shape retention of the fireproof covering material 5 to some extent can be achieved. Can be obtained. However, the present invention is not limited to this embodiment, and any mode may be used as long as it is a fireproof coating material that can be arranged 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 composed of only the core material 6a.

FIG. 3A is a cross-sectional view of the refractory coating material holding structure 10, and is a cross-sectional view taken along the line AA of FIG. The refractory 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 refractory material 6d is attached to the inner peripheral surface of the through hole 9 by the adhesive material 6d. Can be attached along the inner surface of the through hole 9. At this time, by making the length of the fireproof coating material 5 (fireproof material 6c) substantially the same as the inner peripheral length of the through hole 9, the fireproof coating material 5 covers substantially the entire circumference of the inner peripheral surface of the through hole 9. Can be placed.

In this state, the sticking material 6d of the fireproof coating material 5 is attached to the inner surface of the through hole 9, and the fireproof coating material 5 is held in the through hole 9, so that the subsequent spraying work of the fireproof material and the spraying work thereof At the time of preparation, it is possible to prevent the fireproof coating material 5 from falling off or slipping from the through hole 9.

Next, a method of constructing a fireproof coating structure using the fireproof coating material 5 will be described. First, the fireproof coating material 5 is arranged on the inner peripheral surface of the through hole 9 formed in the beam 3. At this time, the sticking material 6d of the fireproof coating material 5 is stuck on the inner surface of the through hole 9. Next, the fireproof material is sprayed on the outer peripheral surface of the beam 3.

FIG. 3B is a cross-sectional view showing a fireproof structure 1 in which a sprayed refractory 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 spray fireproof material 7 is not required on the inner peripheral surface of the through hole 9. Further, since the fire resistance performance of the fireproof coating material 5 (core material 6a) can be improved as compared with the spray fireproof material 7, when the spray fireproof material 7 is formed on the inner peripheral surface of the through hole 9 (dotted line). In comparison, the thickness of the refractory structure can be reduced. Therefore, the size of the through hole 9 can be reduced with respect to 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 refractory material 6c, it is easy to install the refractory coating material 5 such as the inner surface of the through hole 9 of the beam 3. It can be pasted and fixed. Therefore, the refractory coating material holding structure 10 can prevent the refractory coating material 5 from falling off or slipping during work. Therefore, the subsequent construction of the sprayed refractory material 7 is easy, and the refractory structure 1 can be easily obtained.

Further, since the core material 6a of the refractory material 6c is covered with the coating material 6b, for example, when the core material 6a is a refractory wool material, it is possible to suppress damage to the wool material and generation of dust during handling. It is possible to suppress itching caused to the operator due to fine fiber dust. Therefore, the handleability is good. Further, if the covering material 6b is a metal-coated glass cloth or the like, it has some shape-retaining property, so that the form is maintained when the refractory coating material 5 is deformed. Therefore, for example, even when the fireproof coating material 5 itself is rolled and arranged on the inner surface of the through hole 9, the fireproof coating material 5 itself can maintain the rounded shape, and the misalignment and falling off can be more reliably suppressed.

(Second embodiment)
Next, the 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 those of the refractory coating material holding structure 10 and the refractory structure 1 are designated by the same reference numerals as those in FIGS. 1 to 3, and duplicate description will be omitted.

In the present embodiment, the beam reinforcing metal fitting 11 for reinforcing the beam 3 in which the through hole 9 is formed in the web 3a is used. As described above, when the through hole 9 is formed in the beam 3, the through hole 9 reduces the bending strength of the beam 3. The beam reinforcing metal fitting 11 is a member for preventing a decrease in bending strength of the beam 3.

The beam reinforcing metal fitting 11 has a main body portion 12 fixed to the web 3a and a fireproof coating material 5 arranged on the inner peripheral surface of the main body portion 12. The main body 12 is a metal member such as a steel material or stainless steel. The main body 12 is a ring-shaped member as a whole, and has a piping hole through which a pipe or the like penetrates. A fireproof coating material 5 is arranged on the inner peripheral surface of the main body 12 so as to cover the inner surface of the main body 12 over substantially the entire circumference. At this time, the sticking material 6d is stuck on the inner peripheral surface of the main body 12.

FIG. 6A is a diagram showing a fireproof coating material holding structure 10a. The refractory covering material holding structure 10a is substantially the same as the refractory covering material holding structure 10, except that the beam reinforcing metal fitting 11 is fixed to the through hole 9 by welding.

When the beam reinforcing metal fitting 11 is used, first, the beam reinforcing metal fitting 11 is arranged and fixed inside or outside the through hole 9 formed in the beam 3. The fireproof coating material 5 may be attached to the beam reinforcing metal fitting 11 in advance, or the fireproof coating material 5 may be attached to the inner surface of the beam reinforcing metal fitting 11 after fixing the beam reinforcing metal fitting 11. Good. From this state, the fireproof structure 1a shown in FIG. 6B can be obtained by applying the spray fireproof material 7 to the outer peripheral surfaces of the beam 3 and the beam reinforcing metal fitting 11. When the beam reinforcing metal fitting 11 is used, the main body portion 12 of the beam reinforcing metal fitting 11 must also be fireproof coated, but in the present embodiment, the fireproof coating material 5 is provided on the inner peripheral surface of the main body portion 12. Have been placed. 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 fitting 11.

According to the second embodiment, the same effect as that of the first embodiment can be obtained. In this way, the beam 3 can be reinforced by using the beam reinforcing metal fitting 11. At this time, the fireproof structure 1a can be easily obtained by using the beam reinforcing metal fitting 11 provided with the fireproof coating material 5.

(Third Embodiment)
Next, a third embodiment will be described. FIG. 7 is a cross-sectional view showing the fireproof structure 1b. The refractory structure 1b has almost the same structure as the refractory structure 1a, except that the refractory coating material 5a is used. 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. .. Further, in any of the fireproof structures shown below, a spray fireproof material is applied to a fireproof coating material holding structure (not shown) in which the fireproof coating material is held on the inner surface side of the through hole 9.

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

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

According to the third embodiment, the same effect as that of the second embodiment can be obtained. As described above, the sticking means may be a suction cup or the like instead of the double-sided tape.

(Fourth Embodiment)
Next, a fourth embodiment will be described. FIG. 9 is a cross-sectional view showing the fireproof structure 1c. The refractory structure 1c has almost the same structure as the refractory structure 1a, except that the refractory coating material 5b is used.

FIG. 10 is a plan view showing the fireproof coating material 5b. The fireproof coating material 5b is different from the fireproof coating material 5, and 6 g of the adhesive material is used instead of the adhesive material 6d. In the refractory coating material 5b, a plurality of arm portions 6f are arranged at predetermined intervals with respect to the longitudinal direction so as to project on both sides in the width direction perpendicular to the longitudinal direction of the refractory material 6c. The arm portion 6f is made of a member such as a flexible glass cloth.

The sticking material 6g is arranged near the tip of each arm portion 6f, and is arranged at a position overhanging on both sides in the width direction perpendicular to the longitudinal direction of the refractory material. That is, the sticking material 6g is arranged at predetermined intervals along the longitudinal direction of the refractory material 6c. In the present embodiment, the sticking material 6 g is an example of a magnet, but it may be the suction cup, the double-sided tape, or the like described above.

As shown in FIG. 9, the fireproof coating material 5b is rolled up and arranged on the inner peripheral surface of the main body portion 12 of the beam reinforcing metal fitting 11, and the pair of arm portions 6f facing each other in the width direction are bent outward. Then, the web 3a or the main body portion 12 of the beam reinforcing metal fitting 11 is sandwiched between the arm portions 6f. At this time, since the sticking material 6g is arranged on the surface of the arm portion 6f facing the web 3a or the main body portion 12 of the beam reinforcing metal fitting 11, the protruding portions on both sides of the fireproof coating material 5b can be bent. , The overhanging portion can be attached to the outer peripheral portion of the through hole 9 or the beam reinforcing metal fitting 11 with the sticking material 6g, and the fireproof coating material 5a can be fixed.

According to the fourth embodiment, the same effect as that of the second embodiment can be obtained. In this way, the sticking means is arranged on the arm portion 6f protruding in the width direction of the refractory material 6c, and the arm portion 6f is bent toward the web 3a (main body portion 12) to form the through hole 9 and the main body portion 12. Even if there is not enough space on the inner surface, the fireproof coating material 5b can be reliably fixed to the inner surface side 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 does not depend on the above-described embodiments. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical ideas described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

For example, it goes without saying that the above-mentioned configurations 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 ………… Covering material 6c ………… Fireproof material 6d, 6e, 6g ………… Adhesive material 6f ………… Arm 7 ………… Sprayed fireproof material 9 ………… Through holes 10, 10a ………… Fireproof coating material holding structure 11 …… … Beam reinforcing metal fittings 12 ………… Main body 100 ………… Fireproof structure 103 ………… Beam 103a ………… Web 103b ………… Flange 105 ………… Piping 107 ………… Sprayed refractory material 109 ………… Through hole

Claims (11)

Flexible refractory material and
With a sticking material provided on the refractory material,
A fireproof coating material that can be attached to a target portion by the adhesive material. The target portion is a through hole formed in the beam.
The adhesive material is arranged along the longitudinal direction of the refractory material.
The fireproof coating material according to claim 1, 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 coating material according to claim 1 or 2, wherein the sticking material is a magnet, and the magnets are arranged at predetermined intervals along the longitudinal direction of the fireproof material. The fireproof coating material according to claim 1 or 2, wherein the sticking material is a suction cup, and the suction cups are arranged at predetermined intervals along the longitudinal direction of the fireproof material. The fireproof coating according to claim 1 or 2, wherein the adhesive is a double-sided tape or an adhesive, and the double-sided tape or the adhesive is arranged along the longitudinal direction of the fireproof material. Material. The fireproof coating material according to any one of claims 3 to 5, wherein the adhesive material is arranged at positions overhanging on both sides in the width direction perpendicular to the longitudinal direction of the fireproof material. The fireproof coating material according to any one of claims 1 to 6, wherein the fireproof material has a core material and a coating material covering the core material. A beam reinforcing metal fitting for reinforcing a beam having the fireproof coating material according to any one of claims 1 to 6 and having a through hole formed in the web.
The main body arranged in the through hole and
With the fireproof coating material arranged on the inner peripheral surface of the main body,
A beam reinforcing metal fitting characterized by being provided with. A fireproof coating holding material structure using the fireproof coating material according to claim 6.
The fireproof coating material is arranged on the inner surface of the through hole formed in the beam or the beam reinforcing metal fitting fixed to the through hole.
A refractory coating material holding structure, characterized in that portions overhanging on both sides of the fireproof coating material are bent and attached to the outer peripheral portion of the through hole or the beam reinforcing metal fitting. A method for constructing a fireproof coating structure using the fireproof coating material according to any one of claims 1 to 6.
A step of arranging and attaching the fireproof coating 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.
The process of spraying refractory material on the outer peripheral surface of the beam and
A method for constructing a fireproof structure, which comprises the above. The adhesive material is arranged at a position overhanging on both sides in the width direction perpendicular to the longitudinal direction of the refractory material.
The fire resistance according to claim 10, wherein after arranging the fireproof coating material, the overhanging portions on both sides of the fireproof coating material are bent, and the overhanging portion is attached to the outer peripheral portion of the through hole or the beam reinforcing metal fitting. How to build the structure.

Images