JP2019011585A - Partition wall and construction method thereof - Google Patents

Abstract

To delay the time when a steel stud abuts or collides an upper runner in the event of a fire, or reduce or alleviate the stress acting on the steel stud in the case of fire.SOLUTION: In a fire-resistant partition wall (1) of a dry construction method in which a steel or metal stud (4) is erected between upper and lower runners (2, 3), a gap adjustment member (10) for adjusting a gap (9) at an upper end (4a) of the stud is integrally attached to the end of the stud so as to substantially extend the entire length of the stud. The end of the stud including the gap adjustment member is inserted into the groove of the runner. The gap adjustment member melts and softens up due to temperature rise during fire, or breaks or collapses due to temperature rise in the event of a fire, and substantially loses strength and rigidity.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a partition wall and a method for constructing the partition wall. More specifically, the present invention relates to thermal expansion deformation at the time of fire without increasing the size of the gap between the stud upper end and the upper runner (vertical size). It is related with the lightweight partition wall of the dry construction method which can substantially expand the dimension which a steel stud can extend | expand, and its construction method.

  The wall of the building is based on various conditions such as strength, fire and fire resistance, and earthquake resistance based on conditions specific to the building or the building, and collective or city planning conditions such as the site and layout of the building. Receives various regulations under the Building Standards Act. In general, the fireproof partition walls constituting the fire prevention compartment, the pit hole compartment, the smoke exhaust compartment, etc. are a reinforced concrete structure wall body, a block structure wall body such as a concrete block, a panel body wall such as a PCa plate or an ALC plate, or It is constructed by a lightweight fireproof partition wall or the like of a dry construction method in which a wall surface is formed by installing a face material or board material (gypsum board, calcium silicate board, etc.) having a predetermined plate thickness, material and number.

  The lightweight fire-resistant partition wall of the dry construction method is advantageous from the viewpoint of ease of construction and building weight reduction, and is widely used as a wall body such as a door wall, a boundary wall, or a fire-protection partition wall in a medium- and high-rise building. . As a partition wall of this kind, a face material or board material (hereinafter simply referred to as “face material”) for interior (for interior work) such as gypsum board and calcium silicate board is fixed to a steel stud (intermediate column). There are known a partition wall having a shaft structure and a partition wall (generally referred to as a non-stud structure or a studless structure) in which a stud is omitted. In general, the partition wall of the shaft structure is a steel wall base composed of a steel base material for construction (JIS A 6517) such as a steel stud, a steel runner, a swing stopper, a spacer, etc. (Non-Patent Documents 1 and 2) ) As a shaft assembly, and the face material is fixed to the stud using fixing means such as screws, staples, and adhesives. In addition, since the lightweight fireproof partition wall of a dry construction method is generally a non-bearing wall, the fireproof time which is an index of fireproof performance is usually set to 1 hour. Moreover, the basic structure of such a lightweight fireproof partition wall is substantially the same also in the lightweight partition wall of the dry construction method whose fireproof performance (fireproof time) does not reach in one hour.

  In general, steel wall foundations for interior use have a lower runner (floor runner) fixed to a lower structure such as a floor slab, and an upper runner (ceiling runner) fixed to an upper structure such as a beam or an upper floor slab. The upper and lower ends of the steel stud are inserted into the grooves of the upper and lower runners so that the steel stud is vertically built (Patent Documents 1 and 2 (JP-A-9-32161, JP 2007-262823))). The basic structure of such a steel wall base is a light-weight partition wall (light-weight fire-resistant partition wall) having a fire-resistant structure as described in Patent Documents 3 and 4 (Japanese Patent Laid-Open Nos. 8-270114 and 2002-369891). The same applies to the wall).

  Generally, a required clearance (clearance) is formed between the web portion of the upper runner and the upper end of the steel stud for reasons such as workability (Patent Document 5 (Japanese Patent Laid-Open No. 2012-251394)). This gap (hereinafter referred to as the "stud top gap") is considered to be a relatively small gap, and is a lightweight fireproof partition wall that should take into account the thermal expansion of steel studs during a fire. In this case, the size of the gap is usually set to a size of about 10 mm.

  Patent Document 5 proposes that in such a partition wall, the height dimension of the flange portion of the upper runner is enlarged and a special reinforcing / positioning member is fixed to the upper runner. According to such a configuration, the web portion of the upper runner and the steel stud are provided with a relatively large gap in consideration of changes in the load load such as snow load and deformation or behavior of the building due to the action of short-term load. It may be formed between the upper end of

  Moreover, the partition wall structure which inserted the supporting member or the supporting member between the upper end part and lower end part of steel studs, and each upper and lower runner is described in patent document 6 (Unexamined-Japanese-Patent No. 2012-177258). Yes. This partition wall structure has a configuration in which a stud is erected by fixing a special pedestal to upper and lower runners and locking or engaging the upper end and lower end of the square stud with the pedestal.

JP-A-9-32161 JP 2007-262823 A JP-A-8-270114 JP 2002-369891 A JP 2012-251394 A JP 2012-177258 A

Interior finishing construction guidebook (13th edition) Architectural Institute of Japan, standard construction work specifications, explanation JASS26 interior work

  In a lightweight fireproof partition wall with a frame structure with a steel wall base, when the steel stud expands due to thermal expansion in the event of a fire and the stud upper end abuts or abuts against the web portion of the upper runner, the steel stud is Further thermal expansion (extension) is prevented by the upper and lower runners. Further thermal expansion (elongation) of the steel stud constrained by the upper and lower runners causes stress, such as a relatively large thermal stress, in the steel stud. In such a state, the steel stud is generally curved toward the fire chamber side or the non-fire chamber side and tends to bend and deform relatively greatly in association with the pressure change of the fire chamber. Bending deformation of this type of steel stud is undesirable in order to prevent damage or collapse of the wall, thus expanding the gap at the top of the stud and delaying the time when the steel stud contacts the upper runner in the event of a fire. Thus, it is desirable to delay or increase the stress on the steel stud or reduce or alleviate the stress acting on the steel stud.

  On the other hand, when the gap at the upper end of the stud is enlarged in the partition wall of the conventional steel wall base, the allowance (overlapping dimension) between the upper end of the steel stud and the flange portion of the upper runner is shortened. For this reason, in Patent Document 5, by using a special upper runner and reinforcement / positioning member, the gap at the upper end of the stud is enlarged, and a partition wall structure that can follow or adapt to the behavior / deformation of the building is designed. It has been proposed. However, when using a general-purpose architectural steel base material (JIS A 6517) or metal studs and runners in accordance with this, the construction package related to the cross-sectional shape and cross-sectional dimensions of each metal member ( For reasons of architectural detail) and structural reasons of each part of the building, the size of the gap at the upper end of the stud must generally be set to about 10 mm, and this size is difficult to easily expand.

  Patent Document 6 describes a partition wall structure in which a special pedestal is fixed to upper and lower runners and the upper end and lower end of a stud are locked or engaged with the pedestal. However, in such a configuration, a special pedestal must be prepared or manufactured in advance, and in addition, a relatively complicated operation for fixing the pedestal to the upper and lower runners is additionally required. When such a pedestal is used, there also arises a problem that it is difficult to use a general-purpose architectural steel base material (JIS A 6517) or a metal stud or runner according to this.

  The present invention has been made in view of such circumstances, and the object of the present invention is to increase the heat during a fire without increasing the size of the gap at the top end of the stud (the size in the vertical direction) during a non-fire. Due to expansion deformation, the size of the gap in which the steel stud can extend is substantially enlarged, the time when the steel stud abuts or abuts the upper runner in the event of a fire is delayed, or the temperature rises in the event of a fire An object of the present invention is to provide a lightweight partition wall of a dry construction method that can reduce or alleviate stress such as thermal stress acting on a steel stud, and a construction method thereof.

In order to achieve the above object, the present invention has an upper runner and a lower runner fixed to an upper structure and a lower structure, respectively, and steel or metal studs built between upper and lower runners. In the partition wall of the dry construction method, the upper end and the lower end of the stud are inserted into the groove of the runner, and the wall is formed by fixing the face material for building interior to the stud.
A clearance adjustment member that melts and softens due to a temperature rise during a fire, or breaks or collapses due to a temperature rise during a fire and substantially loses strength and rigidity so as to substantially extend the overall length of the stud. The end of the stud attached to the upper end and / or the lower end of the stud and including the gap adjusting member is inserted into the groove of the runner.
In this specification, the terms “melting”, “melting”, “melting”, “melting”, and “melting” are understood to be substantially synonymous, and the term “melting” is used as a concept including melting, melting, melting, and melting. And

In order to achieve the above object, the present invention also fixes the upper runner and the lower runner to the upper structure and the lower structure, respectively, and inserts the upper end and lower end of a steel or metal stud into the groove of the runner. In the construction method of the partition wall in which the stud is built and the wall surface is formed by fixing the face material for building interior to the stud standing between the upper and lower runners,
A clearance adjustment member that melts and softens due to a temperature rise during a fire, or breaks or collapses due to a temperature rise during a fire and substantially loses strength and rigidity, is attached to the upper end and / or lower end of the stud. A method for constructing a partition wall, characterized by substantially extending the entire length of the stud, and inserting the end of the stud including the gap adjusting member into the groove of the runner to build the stud. provide.

  According to the above configuration of the present invention, the gap adjusting member for adjusting the size (height) of the gap at the upper end of the stud is attached to both or one of the upper end and the lower end of the stud, and the total length of the stud is the gap adjusting member. Is substantially extended by The gap adjusting member melts and softens due to a temperature rise during a fire, or breaks or collapses due to a temperature rise during a fire and loses strength. For this reason, according to the present invention, the clearance formed between the stud upper end including the clearance adjustment member and the web portion of the upper runner, the architectural accommodation related to the cross-sectional shape and cross-sectional dimensions of each metal member ( It is possible to set the size in consideration of the construction details) and the structure of each part of the building, that is, a size of 10 mm or less (for example, 5 mm), while the vertical separation distance between the upper end of the stud and the web portion of the upper runner, that is, the gap adjusting member The difference between the overall length of the stud main body excluding the distance between the web portions of the upper and lower runners (that is, the dimension in which the stud can be extended) can be set to a dimension exceeding 10 mm, for example, 15 mm.

For example, since the ambient temperature of the fire environment rises to about 1000 ° C. during a fire, it is assumed that the stud is heated to 400 ° C. during the fire. Under such temperature conditions, assuming that the linear expansion coefficient of the stud is 1 × 10 ⁻⁵ / ° C. and the total length of the stud is 3000 mm, the extension amount of the stud due to thermal expansion reaches about 12 mm. For example, the 12 mm thermal expansion (extension) will be described as an example. In a conventional partition wall that does not include a gap adjusting member, the dimension of the gap at the upper end of the stud at the time of non-fire is 10 mm or less (for example, 5 mm). In some cases, the thermal expansion of the stud is hindered by the upper and lower runners, and therefore a relatively large stress will act on the stud in the event of a fire. However, according to the above configuration of the present invention, when the fire is not fired, the entire length of the stud is substantially extended by the gap adjusting member. The overall length of the stud body is set to 12 mm or more (for example, 15 mm) smaller than the distance between the upper and lower web portions, and the vertical separation distance between the upper end of the stud and the web portion of the upper runner is set to 12 mm or more (for example, 15 mm). Can be set. The clearance adjustment member melts and softens due to a temperature rise during a fire, or breaks or collapses due to a temperature rise during a fire and loses strength and rigidity. Substantial shortening. Therefore, since the size (height) of the gap at the upper end of the stud is substantially increased to 12 mm or more (for example, 15 mm) at the time of a fire, the stud is not easily prevented from thermal expansion (extension) at the time of a fire and is relatively easy. About 12 mm. That is, according to the present invention, the generation of stress such as thermal stress acting on the stud in the event of a fire is delayed even though the gap at the upper end of the stud is set to a dimension of 10 mm or less (for example, 5 mm), or This type of stress can be reduced or alleviated. In the present specification, “fire” means a general fire defined or condition-set in a performance evaluation test of a fireproof structure.

From another viewpoint, the present invention has an upper runner and a lower runner fixed to the upper structure and the lower structure, respectively, and a steel or metal stud built between the upper and lower runners, It is used in a partition wall of a dry construction method having a structure in which an upper end portion and a lower end portion of a stud are inserted into a groove of the runner, and a wall surface is formed by fixing a face material for building interior to the stud, A gap adjusting member attached to the upper end and / or lower end of the stud so as to substantially extend the entire length of the stud and inserted into the groove of the runner together with the end of the stud,
There is provided a partition wall gap adjusting member characterized by being made of a material that melts and softens due to a temperature rise at the time of fire, or is broken or collapsed by a temperature rise at the time of a fire to lose strength.

From still another aspect, the present invention has an upper runner and a lower runner fixed to the upper structure and the lower structure, respectively, and a steel or metal stud built between the upper and lower runners, The stud is used in a partition wall of a dry construction method having a structure in which an upper end and a lower end of the stud are inserted into a groove of the runner to stand and a wall surface is formed by fixing a face material for building interior to the stud. In the stud support method,
A gap adjustment member made of a material that melts and softens due to a temperature rise at the time of a fire or breaks or collapses due to a temperature rise at the time of a fire and loses strength is integrated with the upper end and / or lower end of the stud. To substantially extend the overall length of the stud,
The end of the stud including the clearance adjustment member is inserted into the groove of the runner, and the end of the stud is engaged or fitted with the end of the stud including the clearance adjustment member and the upper runner. Provided is a stud supporting method characterized by supporting.

  According to the gap adjusting member and the stud support method of the present invention, the gap adjusting member melts and softens due to a temperature rise during a fire, or breaks or collapses due to a temperature rise during a fire and loses strength and rigidity. . The gap adjusting member substantially extends the entire length of the stud during non-fire, and substantially shortens the entire length of the stud (before thermal expansion) during a fire. For example, even when the gap size at the top of the stud at the time of non-fire is set to 5 mm, if the total length of the stud including the gap adjustment member is extended by 10 mm with the gap adjustment member, the total length of the stud (before thermal expansion) is Since it is shortened by 10 mm in the event of a fire, the stud can thermally expand (extend) by 15 mm in the event of a fire. That is, according to the gap adjusting member and the stud supporting method of the present invention, the gap dimension in which the stud can extend due to thermal expansion deformation at the time of fire can be substantially enlarged, so that the steel stud is attached to the upper runner at the time of fire. The abutting or abutting time is delayed, or stress such as thermal stress acting on the stud in the event of a fire is relatively greatly reduced or alleviated.

  According to the partition wall and its construction method of the present invention, it relates to a partition wall having a structure in which a face material for building interior is fixed on one side or both sides of a steel wall base, and is made of steel by thermal expansion deformation at the time of fire. The gap dimension that the stud can extend is substantially enlarged, the time when the steel stud contacts or abuts the upper runner in the event of a fire is delayed, or the stress such as thermal stress that acts on the steel stud in the event of a fire is delayed. Can be reduced or alleviated.

  Further, according to the gap adjusting member and the stud support method of the present invention, the partition wall of the dry construction method having a structure in which the face material for building interior is fixed on one side or both sides of the steel wall base, thermal expansion deformation at the time of fire This substantially expands the gap dimension in which the steel stud can be extended by this, thereby delaying the time when stress such as thermal stress is generated in the steel stud during a fire, or stress acting on the steel stud during a fire Can be reduced or alleviated.

FIG. 1 is a perspective view showing a shaft structure of a lightweight fireproof partition wall according to a preferred embodiment of the present invention. FIG. 2 is a perspective view showing the overall structure of the lightweight fireproof partition wall shown in FIG. FIG. 3 is a longitudinal sectional view of the lightweight fireproof partition wall shown in FIGS. 1 and 2. FIG. 4 is a perspective view showing a positional relationship and a structural relationship between the gap adjusting member and the steel stud. 5A is a cross-sectional view showing the positional relationship and the structural relationship between the gap adjusting member and the steel stud, and FIG. 5B is a cross-sectional view taken along the line II of FIG. 5A. 5C is a cross-sectional view taken along the line II-II in FIG. 5B, and FIG. 5D is a cross-sectional view taken along the line III-III in FIG. 5B. 6A is a longitudinal sectional view showing the positional relationship between the upper runner and the stud upper end in a non-fire environment (atmosphere environment), and FIG. 6B is the upper runner and stud upper end in a fire environment (high temperature environment). It is a longitudinal cross-sectional view which shows these positional relationships. FIG. 7 is a perspective view showing a frame structure of a lightweight fireproof partition wall having a single-sided stretch specification according to another preferred embodiment of the present invention. FIG. 8 is a longitudinal sectional view of the lightweight fireproof partition wall shown in FIG. FIG. 9 is a longitudinal sectional view of a partition wall showing a modification of the method for attaching the gap adjusting member. FIG. 10 is a longitudinal sectional view showing the structure of a conventional lightweight fireproof partition wall. FIG. 11A is a longitudinal sectional view showing the positional relationship between the upper runner and the upper end of the stud in a non-fire environment (atmosphere environment), and FIG. 11B shows a conventional lightweight fireproof partition. It is a longitudinal cross-sectional view which shows the positional relationship of the upper runner and stud upper end in a fire environment (high temperature environment) regarding a partition wall.

  According to a preferred embodiment of the present invention, the partition wall is a steel wall base material in which an architectural steel base material (JIS A 6517) or a steel base material equivalent thereto is built as a framework or a shaft. Have The partition wall is a double-sided hollow double wall structure with gypsum board and other face materials attached to both sides of the steel wall base, or one side with gypsum board and other face materials only on one side of the steel wall base It has a single-sided wall structure with tension specifications. In the partition wall of the single-sided wall structure, when the ambient temperature of the fire environment rises to about 1000 ° C, the stud exposed directly to the fire atmosphere rises to the same temperature as the fire atmosphere. Therefore, the action / effect of the present invention is more apparent than the partition wall of the hollow double wall structure.

  In a preferred embodiment of the present invention, the gap adjusting member is attached only to the upper end portion of the stud. Preferably, the size of the gap formed between the gap adjusting member and the web portion of the upper runner is set to a size of 10 mm or less (5 mm or more), and the vertical separation distance between the upper end of the stud and the web portion of the upper runner. Is set to a dimension exceeding 10 mm. If desired, the gap adjusting member may be attached only to the lower end portion of the stud, or the gap adjusting member may be attached to both the upper end portion and the lower end portion of the stud.

  Preferably, JIS 50, 65, 75, 90, and 100 steel base materials are used as the steel wall base, but the configuration of the present invention is limited to such a general-purpose steel wall base. In addition, the present invention can be similarly applied to partition walls using steel studs having a square cross section, staggered steel studs, or metal studs made of a metal material other than steel. Moreover, although the structure of this invention is applied preferably to the partition wall of a fireproof structure, you may employ | adopt the structure of this invention in the partition wall which does not require fireproof performance depending on necessity.

  In a preferred embodiment of the present invention, the gap adjusting member is a resin that melts and softens at a predetermined temperature (for example, about 250 ° C.) in the range of 200 to 400 ° C., or breaks or collapses to lose strength. Consists of molded products. Preferably, the gap adjusting member has a groove in which the upper end portion of the stud can be inserted or fitted. Preferably, the width dimension (dimension in the wall thickness direction) of the gap adjusting member is equal to the width dimension of the stud, and is 50 for steel wall bases of JIS 50, 65, 75, 90 and 100, respectively. , 65, 75, 90, 100 mm. On the other hand, the depth dimension (dimension in the wall length direction) of the gap adjustment member is larger than the depth dimension of the stud, but the gap adjustment member can be inserted into the runner groove relatively easily when the stud is installed. The dimension is set smaller than the width dimension of the stud. Preferably, the gap adjusting member has a curved surface, a tapered surface, a cross-sectional defect portion or the like at a corner so as to enable rotation of the stud end portion (rotation around the vertical axis) in the groove of the runner, or The end surface (the surface extending in the width direction of the stud when the stud is erected) has a curved outline.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  1 and 2 are perspective views showing the structure of a lightweight fireproof partition wall having a hollow double wall structure according to a preferred embodiment of the present invention. FIG. 3 is a longitudinal sectional view of the lightweight fireproof partition wall shown in FIGS. 1 and 2. With reference to FIGS. 1-3, the structure of the lightweight fireproof partition wall which comprises the inner wall of a building, a door wall, a boundary wall, or a fire prevention partition wall etc. is demonstrated.

As shown in FIG. 1, a lightweight fireproof partition wall 1 (hereinafter referred to as “partition wall 1”) has a steel wall base constituting a framework or a shaft assembly of a wall body. This steel wall substrate is a steel wall substrate (Non-Patent Documents 1 and 2) constructed by various members known as a steel substrate for construction (JIS A 6517). The steel wall base is composed of a steel runner 2 (hereinafter referred to as “lower runner 2”) disposed on a floor structure F1 such as a floor slab and an upper floor such as an upper floor slab as its main components. A steel runner 3 (hereinafter referred to as “upper runner 3”) fixed to the lower surface of the structure F2 and a number of steel studs 4 (hereinafter referred to as “upper runner 3”) vertically built between the upper and lower runners 2 and 3. (Referred to as “stud 4”). The studs 4 are aligned and arranged at equal intervals along the wall core. The distance between the studs 4 is set to 455 mm or 606 mm, for example. Further, the wall thickness T ₁ (FIG. 3) of the partition wall 1 is set to about 110 mm, for example. In addition, other steel wall foundation components (JIS A 6517) such as a brace and a spacer are not shown in each drawing.

  As shown in FIG. 2, an interior board material such as a gypsum board constituting the underlaying surface material 5 is fixed to the side surface of the stud 4 by a fixing tool such as a screw or a mooring tool. An interior board material such as a gypsum board constituting the upper surface material 6 is fixed to the outer surface (inner side surface) of the lower surface material 5 by fixing means or anchoring means such as staples and / or adhesives. In this example, the underlaying surface material 5 is constructed in a horizontal form, and the joints or joints of the underlaying surface material 5 extend vertically and horizontally (vertically and horizontally). The upper surface material 6 is constructed in a vertically-arranged form, and the joints or joints of the upper surface material 5 extend vertically and horizontally (vertical / horizontal) so as to be orthogonal to the joints or seams of the lower surface material 5.

  Gypsum board (trade name “Tiger Board” (registered trademark, product of Yoshino Gypsum Co., Ltd.)), ordinary hard gypsum board (trade name “Tiger Super Hard” (registered trademark), etc. , Yoshino Gypsum Co., Ltd.), trade name "Tiger Hyper Hard C" (registered trademark, (Yoshino Gypsum Co., Ltd.) etc.), reinforced gypsum board, structural gypsum board, sizing gypsum board, cosmetic gypsum board, etc. Products, plasterboard with glass fiber nonwoven fabric (trade name “Tiger Glass Rock” (registered trademark, product of Yoshino Gypsum Co., Ltd.)), slag gypsum board (trade name “Asnon” (registered trademark, product of NB Corporation), etc.), cement Board ("Delacrete" (registered trademark, product of United States Gypsum Co., Ltd.)), fiber-mixed gypsum board (trade name "FG Board") (LTD A & Materials Products) and the like), extruded plate (trade name "Kourion studless Panel" (Kourion Ltd. product), etc.), can be suitably used calcium silicate plate.

  The lower surface material 5 and the upper surface material 6 are constructed on both sides of the stud 4, are substantially continuous over the entire height of the partition wall 1, and extend from the upper surface of the floor structure F1 to the lower surface of the upper floor structure F2. Forming a vertical wall surface. As shown in FIG. 3, a hollow portion (air layer) 8 is formed as a substantially sealed concealing space between the underlaying face members 5 on both sides. The heat insulating / sound absorbing material 7 is inserted into the hollow portion 8 as desired.

The partition wall 1 of this example employs a JIS65 type architectural steel base material described below as, for example, the runners 2 and 3 and the studs 4, and as the face materials 5 and 6 and the heat insulating and sound absorbing material 7, Interior board material and heat insulation / sound absorbing material.
・ Lower runner 2: WR-65mm × 40mm × 0.8mm
・ Upper runner 3: WR-65mm × 40mm × 0.8mm
・ Stud 4: WS-65mm × 45mm × 0.8mm
・ Interior board material 5: Reinforced gypsum board ・ Thickness 12.5mm (Yoshino Gypsum Co., Ltd. product “Tiger Board Type Z”)
・ Interior board material 6: Normal hard plaster board ・ Thickness 9.5mm (Yoshino Gypsum Co., Ltd. product “Tiger Hyper Hard C”)
・ Insulation and sound absorbing material 7: Glass wool 24k ・ Thickness 50mm

  The reinforced gypsum board is a gypsum board formed by coating a gypsum core (core part) containing glass fibers with a gypsum board base paper, and is a gypsum board with enhanced fire resistance. The hard gypsum board is a hard, high specific gravity and high strength gypsum board with increased specific gravity, bending fracture load and surface hardness. As these gypsum boards, those having various edge forms such as a bevel edge, a taper edge, or a square edge can be appropriately employed.

  As shown in FIG. 3, a ceiling structure 20 is constructed on the ceiling portion. The ceiling foundation of the ceiling structure 20 includes, for example, a large number of ceiling suspension bolts 21 that hang down from the upper floor structure F2, a field edge receiving material 23 that is locked to the ceiling suspension bolt 21 by hangers 22 and the like, and a field edge receiver. It is composed of a field material 24 supported by a material 23. A ceiling interior board material 25 such as a gypsum board or rock wool sound absorbing board is fixed to the lower surface of the field material 24 by a fixing tool such as a screw or a mooring tool.

  For example, a double floor structure 30 is applied to the floor portion. The double floor structure 30 has a structure in which a large number of support legs 31 are erected on the floor structure F <b> 1 and a floor base plate 32 is supported by the support legs 31. A floor finish 33 is further laminated on the floor base plate 32.

  A gap adjusting member 10 is integrally attached to the upper end portion of the stud 4. The gap adjusting member 10 exhibits the same strength, proof stress, and rigidity as the stud 4 in a non-fire environment, but at a predetermined temperature range (for example, a temperature within a range of 200 to 400 ° C.) when the temperature rises during a fire. It is made of a resin molded product that melts and softens by heating, or that weakens or collapses by burning or oxidation.

  The gap adjusting member 10 constitutes an upper extension portion of the stud 4 in a non-fire environment (atmosphere environment) to substantially extend the entire length of the stud 4, and is softened or weak in a fire (high temperature environment). Or collapses to shorten the overall length of the stud 4. Before explaining the gap adjusting member 10 in order to facilitate understanding of the purpose of use, action or function of the gap adjusting member 10, the configuration (comparative example) of a conventional lightweight fireproof partition wall that does not include the gap adjusting member 10. This will be described with reference to FIGS.

  FIG. 10 is a longitudinal sectional view showing the structure of a conventional lightweight fireproof partition wall. 11 is a longitudinal sectional view showing the structure of the upper end portion of the fireproof partition wall shown in FIG. FIG. 11A shows the positional relationship between the upper runner 3 and the stud upper end 4a in a non-fire environment (atmospheric environment), and FIG. 11B shows the upper runner 3 and the stud in a fire environment (high temperature environment). The positional relationship of the upper end 4a is shown. 10 and 11, the same reference numerals are assigned to components or components substantially the same as or equivalent to the components or components of the partition wall shown in FIGS. 1 to 3.

  The upper end portion and the lower end portion of the stud 4 are inserted into the groove portions of the upper and lower runners 2 and 3, and are erected vertically while being engaged with or locked to the runners 2 and 3. The lower end portion of the stud 4 is sandwiched between the left and right flange portions 2 b of the lower runner 2. The stud lower end 4 b is seated on the web portion 2 a of the lower runner 2, and the vertical load of the stud 4 is supported by the lower runner 2. On the other hand, the upper end portion of the stud 4 is sandwiched between the left and right flange portions 3b of the upper runner 3, but the stud upper end 4a is spaced from the web portion 3a of the upper runner 3, and the stud upper end 4a and the web portion 3a. A gap (clearance) 9 having a dimension T2 is formed between them. The dimension T2 is set to a value within a range of 5 to 10 mm, for example. An engagement allowance (overlapping dimension) T3 between the flange portion 3b and the stud 4 is [the height h1−gap size T2 of the flange portion 3b]. When the 65-type steel wall base is adopted as described above, h1 = 40 mm, T3 = 30 to 35 mm.

The gap 9 is formed mainly for the following reason.
(1) Since the stud 4 is built after the upper and lower runners 2 and 3 are fixed to the upper and lower structures F1 and F2, the entire length of the stud 4 is set to the upper and lower web portions 2a, It is necessary to set the dimension smaller than the separation distance H of 3a.
(2) Immediately compressive stress when distance (height) H is transiently shortened due to changes in the load (goods load, snow load, etc.) and the behavior of the building due to short-term load (earthquake force, etc.) Is prevented from acting on the stud 4.
(3) When the stud 4 is thermally expanded due to a temperature change, a stress such as a thermal stress (compressive stress) is immediately prevented from acting on the stud 4.

  In addition, the dimension T2 of the gap 9 is the cross-sectional shape and cross-sectional dimension of each metal member when a general-purpose architectural steel base material (JIS A 6517) or a metal stud or runner conforming to this is used. Generally, it is set to a dimension of about 10 mm for reasons such as construction details (architectural details) related to the above and other reasons for construction of each part of the building.

  However, since the room temperature at the time of a fire reaches about 1000 degreeC, the temperature of the stud 4 may rise to the temperature exceeding 400 degreeC, for example. In such a high temperature environment, the dimensional change of the stud 4 due to thermal expansion exceeds 10 mm. Therefore, the stud upper end 4a is displaced upward as shown in FIG. 11 (B) and abuts or collides with the web portion 3a. A relatively large stress (compressive stress) acts on the stud 4. As a result, a situation occurs in which the stud 4 is deformed or buckled relatively by stress. The thermal deformation of this type of stud 4 causes damage and breakage of the face materials 5 and 6 and enlargement of joints or joints of the face materials 5 and 6. It is not desirable to ensure the fire resistance of the wall as desired.

  On the other hand, in the partition wall 1 according to the present invention, as shown in FIG. 3, a gap adjusting member 10 is integrally attached to the upper end portion of the stud 4 as a means for preventing the generation or increase of this kind of stress. . The gap adjusting member 10 maintains the dimension T2 of the gap 9 of “10 mm or less” at the time of non-fire, and enables the stud 4 to thermally expand (extend) beyond 10 mm at the time of fire. . Hereinafter, the configuration of the gap adjusting member 10 will be described with reference to FIGS.

  4 and 5A are a perspective view and a cross-sectional view showing a positional relationship and a structural relationship between the gap adjusting member 10 and the stud 4. 5B is a cross-sectional view taken along a line II in FIG. 5A, and FIG. 5C is a cross-sectional view taken along a line II-II in FIG. 5B. ) Is a cross-sectional view taken along line III-III in FIG. 6A is a longitudinal sectional view showing the positional relationship between the upper runner 3 and the stud upper end 4a in a non-fire environment (atmosphere environment), and FIG. 6B is an upper view in a fire environment (high temperature environment). It is a longitudinal cross-sectional view which shows the positional relationship of the runner 3 and the stud upper end 4a.

  The gap adjusting member 10 is a resin molded product that melts and softens at a predetermined temperature within a range of 200 to 400 ° C. (for example, 250 ° C.), or a resin molded product that breaks or collapses and substantially loses strength and rigidity. 4 and 5, the flat horizontal upper surface 11 and the horizontal lower surface 12, the vertical side surface 13 and the end surface 14, and the lower surface opening-shaped groove 15 into which the stud upper end 4a is fitted. The groove 15 has substantially the same planar contour as the stud upper end 4a. The height h2 of the gap adjusting member 10 is set to 20 mm, for example, and the height (depth) h3 of the groove 15 is set to 10 mm, for example. The width W of the gap adjusting member 10 is the same as the width dimension (dimension in the wall thickness direction) of the stud 4 and is set to 65 mm in this example. Accordingly, the side portion 16 of the groove 15 opens to the side. Further, the depth D of the gap adjusting member 10 is set to a dimension that is not less than the depth dimension (dimension in the wall length direction) of the stud 4 and smaller than the width dimension of the stud 4. In this example, the depth D is set to 45 to 60 mm (for example, 55 mm). Both end portions 13 a of the side surface 13 are curved and connected to the end surface 14 so as to facilitate the rotation (rotation around the vertical axis) of the gap adjusting member 10 in the groove portion of the upper runner 3.

  As shown in FIG. 4B, the gap adjusting member 10 is fitted into the upper end portion of the stud 4 by inserting the upper end portion of the stud 4 into the groove 15, whereby the gap adjusting member 10 is inserted into the stud 4. It is attached integrally to the upper end of the. If desired, the stud 4 and the gap adjusting member 10 may be joined with an adhesive, or the gap adjusting member 10 may be fixed to the stud 4 using a fixing tool such as a screw or a screw.

  3 and 5 show a state where the gap adjusting member 10 is integrally attached to the upper end portion of the stud 4 and then the upper end portion of the stud 4 including the gap adjusting member 10 is inserted into the groove of the upper runner 3. Has been.

  6A shows the positional relationship between the upper runner 3 and the stud upper end 4a in a non-fire environment (atmospheric environment), and FIG. 6B shows the upper runner 3 in the fire environment (high temperature environment) and The positional relationship of the stud upper end 4a is shown.

  Since the room temperature at the time of a fire reaches about 1000 degreeC, the temperature of the stud 4 rises to the temperature exceeding 400 degreeC, for example. For this reason, the gap adjusting member 10 melts and softens, or breaks or collapses and substantially loses strength and rigidity. As shown in FIG. 6B, the stud 4 expands due to thermal expansion. When the dimension T2 of the clearance 9 is set to 5 mm, the allowance (overlap dimension) T3 is set to 35 mm, h2 = 20 mm, and h3 = 10 mm, h2−h3 + T2 = 15 mm, so the stud 4 is extended by about 15 mm. can do. The thermal expansion (elongation) of the stud 4 is not hindered by the gap adjusting member 10 or the web portion 3a. Therefore, a large stress (compression stress) hardly acts on the stud 4, and the stud 4 caused by the thermal expansion Stress deformation or buckling is unlikely to occur.

  As described above, the fireproof partition wall 1 is provided with the gap adjusting member 10 that melts and softens due to a temperature rise during a fire, or breaks or collapses due to a temperature rise during a fire and substantially loses strength and rigidity. The stud 4 is integrally attached to the upper end portion of the stud 4. The overall length of the stud is substantially extended by the gap adjusting member. The upper end portion of the stud 4 including the gap adjusting member 10 is inserted into the groove of the upper runner 3. The gap 9 formed between the upper surface 11 of the gap adjusting member 10 and the web portion 3a of the upper runner 3 is a construction fit (architectural detail) related to the cross-sectional shape and cross-sectional dimensions of each metal member, and various parts of the building While it can be set to a dimension (10 mm or less) considering the structure etc., the vertical separation distance between the stud upper end 4a and the web portion 3a of the upper runner 3 takes into account the thermal expansion (extension) of the stud 4 during a fire. Can be set to a dimension (for example, 15 mm). Thus, according to the fireproof partition wall 1 configured as described above, a large stress (compressive stress) does not act on the stud 4 during a fire, and a large stress deformation or buckling occurs in the stud 4 due to thermal expansion during a fire. Can be prevented.

  7 and 8 are a perspective view and a longitudinal sectional view showing a shaft structure of a lightweight fireproof partition wall with a single-sided stretch specification according to another preferred embodiment of the present invention. 7 and 8, the same reference numerals are assigned to the components or components substantially the same as or equivalent to the components or components of the partition wall shown in FIGS. 1 to 3.

  The partition wall 1 shown in FIGS. 1 to 6 relates to a double-sided hollow double wall structure in which face materials 5 and 6 such as gypsum board are fixed on both sides of a steel wall base. As shown in FIGS. 7 and 8, it can be similarly applied to a single-sided wall structure of a single-sided construction in which face materials 5 and 6 such as gypsum board are fixed only on one side of a steel wall base.

  As shown in FIGS. 7 and 8, the single-sided partition wall 1 is provided with a lower surface member 5 and an upper surface member 6 attached to a building space on one side of the partition wall 1 (the space on the right side shown in FIG. 8). In the building space on the opposite side of the partition wall 1 (the space on the left side shown in FIG. 8), the face materials 5 and 6 are not attached, neither the ceiling structure board 20 nor the double floor structure 30 is constructed, and the stud 4 is exposed. It has the structure made. This type of partition wall is, for example, a wall body that is used as a fire prevention partition wall of a pothole partition. The architectural space where the studs 4 are exposed is a space that does not require interior finishing, for example, piping / wiring space, air conditioning duct space, air conditioning machine room, elevator shaft, elevator machine room, etc. Alternatively, it is a future floor area expansion space such as an unfinished architectural space that will be finished in the future.

  Thus, in the partition wall 1 where the stud 4 is exposed, when a fire occurs in the building facility space or the like where the stud 4 is exposed, or the fire spreads from the building facility space or the like to the living space or the like, the stud 4 fires. Directly exposed to When the ambient temperature of the fire environment rises to about 1000 ° C., the stud 4 rises to a temperature equivalent to that of the fire atmosphere, and the gap adjusting member 10 melts and softens, or breaks or collapses, resulting in strength and rigidity. Is substantially lost. As described above, the stud 4 expands due to thermal expansion, but the thermal expansion (elongation) of the stud 4 is not hindered by melting, softening, or breaking or collapsing of the gap adjusting member 10, and accordingly, a large thermal stress. Such stress (compressive stress) hardly acts on the stud 4, and stress deformation or buckling of the stud 4 due to thermal expansion hardly occurs. In the partition wall 1 where the stud 4 is exposed, the amount of expansion of the stud 4 due to thermal expansion is very large. Therefore, the effectiveness of the gap adjusting member 10 or its action / effect is the partition wall 1 of the hollow double wall structure described above. Compared with

  FIG. 9 is a longitudinal sectional view of a partition wall showing a modified example of the method for attaching the gap adjusting member 10. FIG. 9A shows a configuration in which the gap adjusting member 10 is integrally attached to the lower end portion of the stud 4. FIG. 9B shows a configuration in which the gap adjusting member 10 is integrally attached to both the upper end portion and the lower end portion of the stud 4.

  When attaching the gap adjusting member 10 only to the lower end portion of the stud 4 as shown in FIG. 9A, the lower end portion of the stud 4 including the gap adjusting member 10 is sandwiched between the left and right flange portions 2b of the lower runner 2, The lower surface of the gap adjusting member 10 is seated on the web portion 2a of the lower runner 2 and supported by the web portion 2a. As in the previous embodiments, the height h2 of the gap adjusting member 10 is set to 20 mm, for example, and the height (depth) h3 of the groove 15 (FIG. 4) is set to 10 mm, for example. A gap (clearance) 9 having a dimension T2 is formed between the stud upper end 4a and the web portion 3a, and the dimension T2 is set to a value within a range of 5 to 10 mm, for example. Further, the allowance (overlap dimension) T3 between the flange portion 3b and the stud 4 is set to 30 to 35 mm, for example.

  In the partition wall structure in which the gap adjusting member 10 is attached to the lower end portion of the stud 4 as described above, the gap adjusting member 10 is melted and softened due to an increase in the room temperature at the time of a fire, or is broken or collapsed to have strength and rigidity. When substantially lost, the stud 4 is displaced downward, and the dimension T2 of the gap 9 is enlarged. For this reason, as in the previous embodiments, even if the stud 4 expands due to thermal expansion during a fire, stress (compressive stress) such as a large thermal stress hardly acts on the stud 4 and the stud 4 caused by thermal expansion. The stress deformation or buckling hardly occurs.

  9B, when the gap adjusting member 10 is attached to both the upper end and the lower end of the stud 4, the upper end and the lower end of the stud 4 including the gap adjusting member 10 And 3 flange portions 2b and 3b. The lower surface of the gap adjusting member 10 at the lower end of the stud is seated on the web portion 2a of the lower runner 2 and supported by the web portion 2a. A gap (clearance) 9 having a dimension T <b> 2 is formed between the gap adjusting member 10 at the upper end portion of the stud and the web portion 3 a of the upper runner 3.

  The dimension in the height direction of each gap adjusting member 10 shown in FIG. 9B is set to a value halved from the dimension of each of the above-described embodiments. For example, the height h2 of the gap adjusting member 10 is set to 10 mm. The height (depth) h3 of the groove 15 (FIG. 4) is set to 5 mm, for example. Similarly to the above-described embodiments, the dimension T2 of the gap 9 formed between the stud upper end 4a and the web portion 3a is set to a value in the range of 5 to 10 mm, for example, and the flange portion 3b and the stud 4 are set. The overlap margin (overlapping dimension) T3 is set to 30 to 35 mm, for example.

  Thus, in the partition wall structure in which the gap adjusting member 10 is attached to both the upper end and the lower end of the stud 4, the upper and lower gap adjusting members 10 are melted and softened at the same time due to a rise in room temperature during a fire, or The stud 4 is displaced downward and the gap 9 is enlarged because the strength and rigidity are substantially lost due to destruction or collapse. As a result, the stud 4 is thermally expanded in the event of a fire as in the above-described embodiments. Even if extended, stress (compressive stress) such as large thermal stress hardly acts on the stud 4 at the time of fire, and stress deformation or buckling of the stud 4 due to thermal expansion hardly occurs.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications or changes can be made within the scope of the present invention described in the claims. Is possible.

  For example, in the above embodiment, a lightweight fireproof partition wall made of a light iron partition wall having a steel wall base of JIS 65 type has been described. However, the present invention is made of steel of JIS 50 type, 75 type, 90 type, 100 type, etc. Metal base made of wall base or metal wall base conforming to JIS A 6517 architectural steel base (for example, steel studs with square cross section, staggered steel studs, metal made of metal materials other than steel) This is also applicable to a partition wall wall base using a stud made of steel or the like.

  Further, the shape, size, material, etc. of the gap adjusting member in the above embodiment can be arbitrarily changed in accordance with the spirit of the present invention. , The end face or the lower surface may be entirely curved, and the gap adjusting member may be partially molded into a hollow structure, or the gap adjusting member may be manufactured as an assembly of a plurality of parts.

  The present invention is applied to a partition wall of a building and its construction method, and in particular, can be preferably applied to a lightweight fireproof partition wall of a dry construction method and its construction method. According to the present invention, without expanding the size of the gap between the upper end of the stud and the upper runner at the time of non-fire, the size at which the stud can be extended by thermal expansion deformation at the time of fire is substantially expanded. Since the thermal deformation of the stud at the time of a fire can be suppressed, the practical effect is remarkable.

1 Lightweight fireproof partition wall 2 Steel runner (upper runner)
3 Steel runner (lower runner)
4 Steel stud 4a Stud upper end 4b Stud lower end 5 Substrate surface material 6 Upper surface material 9 Clearance
10 Clearance adjusting member 15 Groove

Claims (9)

An upper runner and a lower runner fixed to the upper structure and the lower structure, respectively, and a steel or metal stud built between the upper and lower runners, the upper end and lower end of the stud being In the partition wall of the dry construction method having a structure in which a wall surface is formed by inserting and standing in a groove of the runner, fixing a face material for building interior to the stud,
A clearance adjustment member that melts and softens due to a temperature rise during a fire, or breaks or collapses due to a temperature rise during a fire and substantially loses strength and rigidity so as to substantially extend the overall length of the stud. A partition wall attached to an upper end portion and / or a lower end portion of the stud, and an end portion of the stud including the gap adjusting member inserted into a groove of the runner. The upper runner and the lower runner are fixed to the upper structure and the lower structure, respectively, and the upper end and the lower end of a steel or metal stud are inserted into the groove of the runner, and the stud is installed. In the construction method of the partition wall which forms the wall surface by fixing the face material for building interior to the stud erected between,
A clearance adjustment member that melts and softens due to a temperature rise during a fire, or breaks or collapses due to a temperature rise during a fire and substantially loses strength and rigidity, is attached to the upper end and / or lower end of the stud. A method for constructing a partition wall, wherein the stud is extended by substantially extending the entire length of the stud, and inserting the end portion of the stud including the gap adjusting member into the groove of the runner. An upper runner and a lower runner fixed to the upper structure and the lower structure, respectively, and a steel or metal stud built between the upper and lower runners, the upper end and lower end of the stud being Used in the partition wall of the dry construction method, which has a structure in which it is inserted into the runner's groove and stands upright, and a wall material is formed by fixing the face material for building interior to the stud, and substantially extends the total length of the stud A gap adjusting member attached to the upper end and / or lower end of the stud and inserted into the groove of the runner together with the end of the stud,
A gap adjusting member for a partition wall, which is made of a material that melts and softens due to a temperature rise at the time of a fire, or breaks or collapses due to a temperature rise at the time of a fire and loses strength. An upper runner and a lower runner fixed to the upper structure and the lower structure, respectively, and a steel or metal stud built between the upper and lower runners, the upper end and lower end of the stud being In the stud support method used in the partition wall of the dry construction method having a structure in which a wall surface is formed by inserting and standing in the groove of the runner and fixing a wall material for building interior to the stud,
A gap adjustment member made of a material that melts and softens due to a temperature rise at the time of a fire or breaks or collapses due to a temperature rise at the time of a fire and loses strength is integrated with the upper end and / or lower end of the stud. To substantially extend the overall length of the stud,
The end of the stud including the clearance adjustment member is inserted into the groove of the runner, and the end of the stud is engaged or fitted with the end of the stud including the clearance adjustment member and the upper runner. A stud support method characterized by supporting.   2. The partition wall according to claim 1, wherein the partition wall has a single-sided wall structure of a single-sided tension specification in which the face material is attached only to one side of the stud.   The gap adjusting member is attached to an upper end portion of the stud, and a dimension of a gap formed between the gap adjusting member and a web portion of the upper runner is set to a dimension of 10 mm or less, and an upper end of the stud The partition wall according to claim 1 or 5, wherein a vertical separation distance between the web portion and the web portion is set to a dimension exceeding 10 mm.   The gap adjusting member has a curved surface, a tapered surface, or a cross-sectional defect portion at its corner so as to enable rotation around the vertical central axis of the gap adjusting member in the groove of the runner, or The partition wall according to claim 1, 5 or 6, wherein the partition wall has a contour in which the end face is entirely curved.   The construction method according to claim 2, wherein a partition wall having a single-side wall structure in which the face material is fixed only on one side of the stud is constructed.   The gap adjusting member is attached to the upper end portion of the stud, and a gap having a size of 10 mm or less is formed between the gap adjusting member and the web portion of the upper runner, and the vertical end of the stud and the web portion is vertical. The construction method according to claim 2, wherein the separation distance is set to a dimension exceeding 10 mm.

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