JP5072272B2 - Dry partition wall structure - Google Patents

Description

  The present invention belongs to the technical field of a structure for improving the fireproof performance of a dry partition wall, and more specifically, a dry partition wall that suppresses a temperature rise of a joint portion of a fireproof board attached to one or both sides of a steel stud. Concerning structure.

Conventionally, from the viewpoint of reducing the weight of a building, a dry-type fireproof structure in which a calcium silicate board mixed with fiber is installed on one or both sides of a steel stud made of lightweight steel and a gypsum board is attached to the outside. A dry fire-resistant partition wall structure having a two-board board structure is used as a fire-proof partition wall such as an area partition or a pit-hole partition.
The partition wall structure described above has the advantage of preventing the steel studs from being directly exposed to the heat of the fire and improving the fire resistance performance, but when heating proceeds and the temperature of the fireproof board on the heating surface side rises, Heat is transferred to the steel studs through the joints of the refractory board, which raises the temperature of the steel studs and causes deformation. End up. Moreover, the temperature rise of the space where the steel studs are arranged is promoted, and the heat flows into the room through the joint portion of the fireproof board on the non-heated surface side. Therefore, the fire resistance performance is determined by the temperature of the leaking heat even though the fire resistance board is alive, and there is a problem that the fire resistance performance inherent to the fire resistance board cannot be exhibited.

  In consideration of the above points, the following Patent Document 1 discloses a technique for inserting a fireproof joint member 40 into a vertical joint of a fireproof partition wall. Specifically, as shown in FIG. Reference numeral 40 denotes a rust-proof steel plate or decorative steel plate such as zinc having a hat-shaped cross section, and is positioned on the upper surface of the lower plate 41 and then pressed against the lower plate 41 by the edge of the upper plate 42 to be attached. ing.

In Patent Documents 2 and 3, a fire-resistant plate (non-combustible material) such as a glass fiber mixed gypsum plate is provided between a dry-type board made of an underlay plate and an upper plate and a steel stud, and the steel stud is made. The structure which prevents that heat is transmitted to a dry-type board (non-heating surface side) through is disclosed.
JP 2002-309691 A JP 2003-278298 A JP-A-60-19854

The technique of Patent Document 1 is a technique that prevents heat from entering through the joint portion of the upper plate 42 by the fireproof joint member 40. However, as shown in FIG. 4, the fireproof joint member 40 is configured to conceal only the joint portion of the upper plate 42 in a configuration in which the upper plate 42 is installed on the upper surface of the lower plate 41. The heat raised in the space in which 43 is disposed enters through the joint portion of the lower plate 41 and raises the temperature of the fireproof board. Then, there is a problem that the lower plate 41 and the upper plate 42 are deformed.
Moreover, since the refractory joint member 40 is an expensive metal plate such as zinc, the cost increases and it cannot be said that it is economical.

  Although it is recognized that the techniques of Patent Documents 2 and 3 have an effect of preventing the transfer of heat from the steel stud, as described above, the heat that has risen in the space where the steel stud is disposed, The problem that heat enters from the joint portion of the lower plate or the upper plate and deforms both plates to reduce the fire resistance performance has not been solved.

The object of the present invention is to minimize the heat from entering through the joint part of the fireproof board composed of the lower board and the upper board, to suppress the temperature rise due to the joint part over a long period of time, and the fireproof performance of the fireproof board An object of the present invention is to provide a dry partition wall structure that effectively and dramatically improves the above.
An object of the present invention is to provide a dry partition wall structure in which a steel stud is or is prevented from transferring heat.

As a means for solving the above-described problems of the prior art, in the dry partition wall structure according to the invention described in claim 1,
A fire-resistant partition wall having a dry structure, in which a fire-resistant board composed of a lower plate and an upper plate is attached to one side or both sides of a steel stud,
The joint portion of the lower plate that is continuously attached to one side or both side surfaces of the steel stud has a phased portion formed at the joint portion of the lower plate, and the adjacent lower plate has a phase-separated structure. In addition, a foamable refractory material is installed between the phase cracks ,
A non-combustible material is installed between the steel stud and the undercoating plate, and the non-combustible material is disposed at the position of the phased portion of the undercoating plate .

The invention according to claim 2 is the dry partition wall structure according to claim 1,
The joint portion of the upper plate that is continuously attached to the upper surface of the lower plate is different in position from the joint portion of the lower plate, and a staggered portion is formed at the joint portion of the upper plate. It is a phase chip joint structure, and further, a foamable refractory material is installed between the phase chip joints .

The dry partition wall structure according to the invention described in claim 1 or 2 has the following effects.
Since the joint portion of the lower plate forms a phase notch at the joint, and the adjacent lower plate has a phase-separated joint structure, the amount of heat that the temperature rises enters from the joint portion of the lower plate. Can be suppressed. In particular, the temperature rise of the refractory board composed of the lower plate and the upper plate is suppressed to the minimum by preventing the heat raised in the space where the steel stud is placed from entering the joint portion of the lower plate on the non-heated surface side. Deformation can be suppressed and fire resistance can be effectively and dramatically improved.
In addition, a foaming refractory material is installed between the phase breaks, and when heat leaks from the phase breaks, it fires and forms a heat insulation layer, which reliably prevents heat from passing through the joints. And the temperature rise of a joint part can be suppressed over a long time.
In addition, since a non-combustible material is installed between the steel stud and the underlaying plate, the steel stud can transfer heat from the heated surface side fireproof board and to the nonheated surface side fireproof board. It is possible to suppress the loosening of the restraint of the fireproof board due to the deformation of the steel stud and the reduction of the temperature rise of the fireproof board itself.
Not only that, but with a joint structure in which the joint part of the underlaying plate has a phase-separated joint structure and a non-combustible material is installed on the steel stud, heat can be reliably prevented from entering through the joint portion of the underlaying plate and The refractory board consisting of the bottom plate and the top plate inherently has a synergistic effect that prevents the steel stud from transferring heat from the refractory board on the heated surface side or from transferring heat to the refractory board on the non-heated surface side The fireproof performance can be demonstrated reliably.

In addition, the phase-break joint structure and foamed refractory material installed at the joints of the underlaying plate are also installed at the joints of the upper platen, so that the fireproof performance at important locations where heat enters and discharges is achieved. It can be fully utilized to increase the safety during a fire by providing sufficient fireproof time.

The present invention is a fireproof partition wall 1 having a dry structure, and is a partition wall structure in which a fireproof board 5 composed of a lower plate 3 and an upper plate 4 is attached to both side surfaces of a steel stud 2.
The joint portion 30 of the lower plate 3 that is continuously attached to the steel stud 2 has a phase missing portion 31 formed at the joint portion of the lower plate 3, and the adjacent lower plate 3 has a phase missing structure. In addition, a foamable refractory material 6 is installed between the phase cracks.

First below, the group Dzu rather Reference Example 1 in Figure 1 will be described in order to facilitate understanding of the embodiments of the dry partition wall structure according to the present invention.
The dry partition wall 1 of the present invention is suitably implemented as a fire-proof partition wall such as an area partition or a pit-hole partition.

  FIG. 1A shows a plan view of the dry partition wall 1 of the present invention. A steel stud 2 is used for the shaft of the partition wall 1. The steel stud 2 is made of lightweight steel or a steel channel-type member, and is erected vertically with respect to the floor slab so as to be aligned in the wall core direction with an interval of about 300 to 600 mm.

  A fireproof board 5 composed of a lower plate 3 and an upper plate 4 is attached to both side surfaces of the steel studs 2. Specifically, the underlay plates 3 and 3 are fiber-mixed calcium silicate plates, and are attached by screws and / or an adhesive in a horizontally continuous arrangement on the both side surfaces of the steel stud 2.

  The joint portions 30 of the underlay plates 3 and 3 that are continuously attached to the steel stud 2 are formed with a phase cutout portion 31 at the joint end portion of the undercoat plate 3. Moreover, the adjacent underlay plates 3 and 3 are constructed with a phase chip joint structure in which the phase cut portions 31 and 31 are fitted. The shape of the phase lacking portion 31 is a crank shape in plan view so as to exert an effect of suppressing the amount of heat entering from the joint portion 30.

Further, a foamable refractory material 6 is installed between the phased joints of the underlaying plates 3 and 3.
In the foamable refractory material 6, when heat enters from the gap between the joint portions 30, the seal is foamed to form a heat insulating layer to block the heat. As described above, when the phase missing portion 31 and the foamable refractory material 6 are used in combination, the temperature rise of each joint portion 30 of the underlay plate 3 can be prevented over a long period of time. Performance can be improved dramatically.
Although the said foamable refractory material 6 is provided only in the substantially center part of the underlay board 3 in FIG. 1A, of course, it is not this limitation. As shown in FIG. 1B, it is preferable to provide over the entire surface of the phase missing portion 31.

After the construction of the bottom plate 3 in which the joint portion 30 is formed as a phase-separated joint as described above in the horizontal direction, the top plate 4 is used as a plaster board whose surface has been previously finished by construction work on the upper surface thereof. The fireproof board 5 is completed by continuously attaching with screws or staples. The present invention is carried out on both of the underlying plates 3 arranged on both sides of the steel stud 2, that is, the heating surface side F and the non-heating surface side B, as shown in the figure.
Therefore, on the heating surface side F, high heat is prevented from entering from the joint portion 30 of the underlay plate 3 to the minimum. On the non-heated surface side B, the temperature of the narrow space S of the steel stud 2 rises due to the heat that has flowed in from the joint portion 30, and the increased heat is generated on the non-heated surface side B underlaying plate 3. It can prevent entering into the joint part 30 and the joint part 40 of the upper plate 4 and flowing into the room.
In this reference example 1, the example implemented on the joint portion 30 of the lower plate 3 attached to both side surfaces of the steel stud 2 is shown, but although not shown, it is attached only to one side of the steel stud 2. It can also be carried out on the joint portion 30 of the underlay plate 3. Of course, it is added that it can be carried out only on one side surface (heating surface side) of the underlay plates 3 and 3 attached to both side surfaces.

Next , Reference Example 2 that facilitates understanding of the dry partition wall structure according to the present invention will be described with reference to the drawings.
When a fire occurs, the heat of the refractory board 5 on the heating surface side F heated by the fire heat is transmitted to the refractory board 5 on the non-heating surface side B via the steel stud 2. In order to prevent the above points, it is preferable to install a non-combustible material 7 between the steel stud 2 and the underlay plate 3 as shown in FIG. The non-combustible material 7 is rock wool, ceramic fiber blanket, glass fiber mixed cement plate or the like, and is attached to the steel stud 2 with an adhesive or the like.

FIG. 3 shows a dry partition wall structure 1 according to the present invention constructed by combining Reference Examples 1 and 2 of FIGS. 1 and 2. That is, the joint portion 30 of the lower plate 3 has a phase chip joint structure, and the noncombustible material 7 is installed between the steel stud 2 and the lower plate 3.
With the above composite structure, heat is prevented from entering through the joint portion 30 of the lower plate 3 to the minimum, and the steel stud 2 is transmitted with heat from the lower plate 3 of the heating surface side F or is not heated. The synergistic effect of reliably suppressing the heat transfer to the side B underlaying plate 3 can be realized, and the fireproof performance inherent to the fireproof board 5 can be reliably exhibited. Therefore, it can contribute to a highly safe structure with sufficient evacuation time in case of fire.

Particularly preferable as the positional relationship between the phase chip joint of the underlaying plate 3 and the noncombustible material 7 is the nonflammable material 7 at the outlet portion position or the inlet portion position ( contact position with the joint portion 30) of the crank-shaped phase joint. It is preferable that a steel stud 2 provided with is arranged. This is because the incombustible material 7 functions as a lid or an absorbent material for the joint portion 30.

Although the illustration of the present invention is omitted, the jointing structure and the foamed refractory material 6 installed in the joint portion 30 of the lower plate 3 described above are also applied to the joint portion 40 of the upper plate 4. It is preferably carried out (the invention according to claim 2 ). In this case, the fireproof performance at the important positions of the heat input and discharge is sufficiently exhibited, so that it is possible to sufficiently secure the fireproof time and further improve the safety at the time of fire.

  Although the embodiments have been described with reference to the drawings, the present invention is not limited to the illustrated examples, and includes a range of design modifications and application variations that a person skilled in the art normally performs without departing from the technical idea thereof. I will add that just in case.

A is a plan view showing a reference example of a dry partition wall structure according to the present invention. B is an enlarged plan view of the joint portion of the joint. It is the top view which showed an example which attached the nonflammable material to the steel studs. It is the top view which showed one Embodiment of the dry partition wall structure which merged FIG. 1 and FIG. It is the reference figure which showed the prior art.

DESCRIPTION OF SYMBOLS 1 Dry type partition wall 2 Steel stud 3 Substrate 4 Upper plate 5 Fireproof board 6 Foaming fireproof material 7 Nonflammable material

Claims (2)

A fire-resistant partition wall having a dry structure, in which a fire-resistant board composed of a lower plate and an upper plate is attached to one side or both sides of a steel stud,
The joint portion of the lower plate that is continuously attached to one side or both side surfaces of the steel stud has a phased portion formed at the joint portion of the lower plate, and the adjacent lower plate has a phase-separated structure. In addition, a foamable refractory material is installed between the phase cracks ,
A dry partition wall structure characterized in that an incombustible material is installed between the steel stud and the underboard, and the incombustible material is arranged at a position of a phased portion of the underplate . The joint portion of the upper plate that is continuously attached to the upper surface of the lower plate is different in position from the joint portion of the lower plate, and a staggered portion is formed at the joint portion of the upper plate. 2. The dry partition wall structure according to claim 1, wherein the dry partition wall structure is a phase chip joint structure, and further a foamable refractory material is installed between the phase chip joints.

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