JPH06158749A - Fire-resistant construction of building - Google Patents

Abstract

PURPOSE:To provide sufficient strength against impact etc., and improve construction efficiency. CONSTITUTION:Plural number of mounting members 2 that have U-shaped sections and are to be fixed on a top beam 14, a continuous member 6 which is placed in the lengthwise direction of the beam 14 and holds a fire resistant material 3 which is inserted between the members 2 and the member 6, and stepped bolts 8 which keep a clearance between the members 2 and the member 6 are provided, and a fire resistant construction 1 of a building of which top beam 14 are covered with the fire resistive material is constituted. The continuous member 6 is provided with beams 18 via ribs 7. The beams 18, the fire resistive material 3 and the mounting members 2 are integrally installed on the continuous member 6 and, therefore, resulting in a large strength and easy handling at the time of assembling etc., and its construction efficiency is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof structure of a building,
In particular, it can be used when a structural material such as a beam is coated with a refractory material.

[0002]

[Background Art] When building a steel structure in Japan, in order to prevent the temperature of structural members from rising and the mechanical properties of the building from deteriorating in the event of a fire, use fire-resistant materials such as calcium silicate (calcium board). It is obligatory to coat the surface of structural members such as columns and beams. By the way, a unit-type building constructed by combining a plurality of building units produced in a factory in advance at a construction site is also a kind of the steel structure building, and generally, the building unit is composed of four pillars arranged at four corners. And upper and lower girders that connect the upper and lower ends of these columns, and a beam girder spanned between the facing girders. In this case, strict fireproof coating must be applied to columns and girders under heavy load. In addition, in many cases, the beams and the like are indirectly covered with a fireproof material such as a ceiling material or a floor material.

As an example of a technique for attaching a refractory material to the side where the beam is attached to the large beam, Japanese Patent Laid-Open No. 2-176
044 publication is mentioned. According to the publication, a long refractory material along the longitudinal direction of the girder is sandwiched by gussets arranged facing each other at equal intervals, and both gussets are fixed by a sleeve and a fixture. And a beam is connected to each of the gussets on one side,
By attaching the gusset on the opposite side to the girder,
A large beam and a small beam are connected and fixed with a refractory material in between.

[0004]

However, in the fireproof structure of a building as described above, one frame is made up of a long fireproof material and a plurality of joists through gussets that are arranged facing each other and are equally spaced. The body is formed. In other words, the refractory material supports a plurality of beams. And, as a refractory material, a calcareous plate or the like is used.
It has the drawback of being hard and vulnerable to shock, and easily cracked when shock is applied. Therefore, there has been a problem that the frame body formed of a fire-resistant material such as a calcareous plate is weak in strength against impact or the like.

Further, when the frame is first made of a fire-resistant calcareous plate or the like, since the calcareous plate is weak in strength against impact or the like, it is particularly necessary to prevent the calical plate from being broken during handling during assembly. It requires careful work, requires a lot of time for installation work, and is inefficient in construction.

[0006] It is an object of the present invention to provide a fireproof structure for a building, which is strong in strength against impacts and the like and can be improved in construction efficiency.

[0007]

Therefore, the present invention is directed to the first aspect of the present invention.
Structure material, a second structure material that is attached so as to intersect with the first structure material, and between the first structure material and the second structure material in the longitudinal direction of the first structure material. In a fireproof structure of a building including a refractory material mounted along the same, a mounting member fixed to the first structural material and a side opposite to the mounting member sandwiching the refractory material, and a first A through member arranged along the longitudinal direction of the structural material and supporting an end portion of the second structural material, and a gap holding tool for holding a gap between the through member and the mounting member at a predetermined gap. It is a fireproof structure of the building.

[0008]

According to the present invention as described above, the refractory material is sandwiched between the mounting member and the through member supporting the end portion of the second structural member, and the space between the mounting member and the through member is set to a predetermined gap by the space holder. And the mounting member is fixed to the first structural member. Since the second structural material, the refractory material, and the mounting member are frame-structured in a state of being mounted to the through member, they are strong against impacts and the like, and also strong in strength, and therefore are easy to handle. It is easy, and as a result, the construction efficiency can be improved, and the above-mentioned objects can be achieved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a skeleton of a building unit 10 to which a building fireproof structure according to this embodiment is applied. This skeleton is composed of four columns 11 at four corners, a pair of long-side beams 12 and a pair of short-side beams 13 that connect the upper ends of the columns 11 to each other.
The upper beam 14 which is a structural member of the above, and the lower beam 17 composed of the long-side beam 15 and the short-side beam 16 connecting the lower ends of the columns 11 to each other.
The pillar 11 is made of a hollow prismatic material, and has an upper beam 14 and a lower beam 17.
Consists of so-called channel material. Further, between the pair of long side beams 12 of the upper beam 14, a small beam 18 which is a second structural material is hung. Such a skeleton is preassembled in a factory, and the floor and ceiling materials, equipment such as outer walls, and construction materials are also attached to the skeleton.

In the fire resistant structure 1 of the building of this embodiment, the upper beam 14 is made of a refractory material at a portion where the upper beam 14 which is the first structural material and the beam 18 which is the second structural material are connected and fixed. 2 and 3 are longitudinal sectional views and lateral sectional views, respectively. In these figures, the upper beam 14 is
A plurality of mounting members 2 each having a U-shaped cross section and having a predetermined width are mounted on the inside of the room 10 at equal intervals in the longitudinal direction of the upper beam 12. The upper and lower flange portions 2A and 2B of the mounting member 2 are the upper and lower flange portions 14A and 14B of the upper beam 14, respectively.
Is fitted and fixed by welding or the like so that the web 2C of the mounting member 2 is located on the indoor side of the building unit 10.

On the rear surface of the web 2C of the mounting member 2, there is an upper beam.
A refractory material 3 having flexibility is attached along the longitudinal direction of 14. One end of this refractory material 3 is attached to the attachment member 2
The web 2C has a bent portion 3A which is horizontally bent from the upper end on the rear side to the indoor side of the building unit 10. It is in contact with the back side. Further, the other end 3B of the refractory material 3 is provided with an upper beam from the back surface of the web 2C.
It extends to a length that covers the lower surface of the lower flange portion 14B of 14 and further covers approximately half of the rear surface of the web 14C of the upper beam 14. The other end 3B is fixed from the outside by a pin 5 with a washer 4 that is driven into the flange portion 14B of the upper beam 14 and the web 14C of the upper beam 14.

The bent portion 3A is in contact with the back surface of the floor 21 of the upper floor building unit 20 as described above.
As shown in FIG. 4, is attached to a fixture 22, and the fixture 22 is attached to a pad member 23 fixed to a lower beam 17 of the upper floor building unit 20. On the upper part of the floor 21, through the wood joists 24, floor finishing materials such as particle boards.
25 are laid. In addition, as a fireproof structure of the lower beam 17, a calcareous plate 26 is fitted between the tree joist 24 and the pad member 23, and when the building units 20, 20 and the like are combined, they are adjacent to the adjacent building units 20, 20. In the space between the mating calcareous plates 26, 26, a caulcal plate 27 for connection at the construction site is fitted.

Here, the flexible refractory material 3 is, for example, Flexguard (trade name, manufactured by Nichias Corporation).
It is composed of a composite material in which rock wool, ceramic fiber, non-woven fabric, and hexagonal wire mesh are sequentially laminated.

As shown in FIG. 2, a through member 6 is provided along the longitudinal direction of the upper beam 14 on the opposite side of the mounting member 2 with the refractory material 3 interposed therebetween. The through member 6 is formed into a channel material having a U-shaped cross section, but the upper flange portion 6A is formed longer than the lower flange portion 6B in order to support the bent portion 3A of the refractory material 3. Ribs 7 are attached to the inside of the through member 6 at equal intervals along the longitudinal direction of the upper beam 14, and a plurality of beam members 8 that are second structural members are welded to the ribs 7, respectively. It is fixed by etc. A ceiling material 19 is previously attached to the lower flange portion 6B of the through member 6 and the lower surface of the beam 18 at the factory. Further, a ceiling material 19A for connection is attached at the construction site on the lower surface of the refractory material 3 between the through members 6 and 6 adjacent to each other in the adjacent building units 10 and 10.

The through member 6 and the mounting member 2 are provided with stepped bolts 8 which are space holders for holding the space therebetween. This stepped bolt 8 is
The diameter of the shaft portion 8A is formed larger than the diameter of the threaded portion 8B at the tip, and when the mounting member 2 is mounted on the threaded portion 8B side, the interval between the through member 6 and the mounting member 2 is stepped bolt 8 It is designed to be held at the length of the shaft portion 8A. Therefore, even if the refractory material 3 sandwiched between the through member 6 and the mounting member 2 is the flexible refractory material 3, it is possible to secure and hold a certain thickness.

FIG. 4 shows a unit-type building 30 in which a plurality of building units 10 having the above-mentioned fireproof structure are combined. In order to build such a unit-type building 30, first, the through member 6 of the building unit 10A on the lower floor is to be constructed.
A predetermined number of beam 18 is fixed to ribs 7 via ribs 7, flexible refractory material 3 is sandwiched between this through member 6 and mounting member 2, and through member 8 and mounting member 2 are provided with stepped bolts 8.
And are fixed to form a frame. Next, the mounting member 6 is inserted into the upper beam 14 of the frame body and welded, so that the upper beam 14 and the beam 18 are connected and fixed. After that, the other end 3B of the refractory material 3 is sequentially bent, the lower flange 14B lower surface of the upper beam 14 and the web 14C surface of the upper beam 14 are covered, and fixed to these surfaces 14B, 14C by the pin 5 with the washer 4. .

Next, the lower floor building unit as described above
Combine 10A, and combine building unit 20 on the upper floor with building unit 10A on the lower floor. After that, the ceiling material 19A for connection is attached to the gap between the adjacent ceiling materials 19 of the building units 10A and 10A on the lower floors adjacent to each other. Next, the adjacent floor finishing materials 25,25 between the adjacent upper floor building units 20,20
A caulking plate 27 for connection is attached to the gap between the two, and the lower beams 17 of the adjacent upper floor building units 20, 20 are fireproof coated.

According to this embodiment as described above, the following effects can be obtained. That is, since the beam 18 is supported by the rib 7 and the refractory material 3 is supported by the through member 6 through the mounting member 2, the frame body constituted by these is strong in strength. Therefore, since it is not necessary to use unnecessary nerves for handling such as assembling, there is an effect that workability is good and construction efficiency can be improved.

Further, since the mounting member 2 and the through member 6 are held in a constant gap by the stepped bolt 8,
Even if the refractory material 3 is flexible, a certain thickness can be secured, and the refractory material 3 is not crushed or uneven in thickness.

Further, since the refractory material 3 having flexibility is used, the refractory material 3 does not crack due to impact, etc., and can be easily bent, so that the efficiency of construction can be improved. it can.

To install the refractory material 3, after the refractory material 3 is sandwiched between the mounting member 2 and the through member 6, the stepped bolt 8 is inserted and the nut is screwed, and the mounting operation is easy. is there.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, the stepped bolt 8 as the spacing member of the first embodiment is a combination of a bolt 50 and a long nut 51. That is, the long nut 51 formed to be equal to the gap between the mounting member 2 and the through member 6.
Is fixed to the attachment member 2 or the through member 6 in advance,
After the refractory material 3 is sandwiched, the bolt 50 is screwed and attached to the long nut 51. The same members as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted. Also in this embodiment,
The same effects as those of the first embodiment can be obtained.

The present invention is not limited to the above-mentioned embodiments, but includes the following modifications. That is, in each of the above-described embodiments, the mounting member 2 is assumed to have a predetermined width, but the present invention is not limited to this, and as with the through member 6, it may be a single through member along the longitudinal direction of the upper beam 14. Good.

Further, in each of the above-mentioned embodiments, a material having flexibility is used as the refractory material 3. However, the material is not limited to this, and the essential point is that the upper beam 14 and the like can be covered. May be used.

Further, in each of the above-mentioned embodiments, the building having the fireproof structure is the building unit 10 or the like, but the present invention is not limited to this, and any structure having the upper beam 14 and the girder 18 can be used. It can also be applied to buildings that have construction methods.

In addition, the specific structure, shape and the like for carrying out the present invention may be other structures and the like as long as the object of the present invention can be achieved.

[0027]

As described above, according to the fireproof structure for a building of the present invention, there is an effect that it is strong in strength against impacts and the like, and that construction efficiency can be improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a framework of a building unit.

FIG. 2 is a vertical sectional view showing a fireproof structure of the building unit according to the first embodiment of the present invention.

FIG. 3 shows a fireproof structure of the frame of the building unit, and FIG.
FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is a vertical sectional view showing a fireproof structure of a unit-type building.

FIG. 5 is a vertical sectional view showing a fireproof structure of a building unit according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Fireproof structure of building unit 2 Mounting member 3 Fireproof material 6 Through member 8 Stepped bolt (spacer) 10 Building unit 14 Upper beam (first structural material) 18 Beam (second structural material) 30 Unit type building

Claims (1)

[Claims] 1. A first structural material, a second structural material attached to intersect with the first structural material, and the first structural material.
In a fireproof structure of a building, comprising: a structural material of 1) and a second structural material, the refractory material being attached along the longitudinal direction of the first structural material, and a mounting member fixed to the first structural material. And a through member arranged on the opposite side of the mounting member with the refractory material interposed therebetween and along the longitudinal direction of the first structural material, and supporting the end portion of the second structural material, and the through member. A fireproof structure for a building, comprising: a space holder that holds a space between a member and the mounting member at a predetermined space.