JP5660613B2 - Joint structure and construction method of lightweight fireproof partition wall - Google Patents

Description

  The present invention relates to a joint structure of a lightweight fireproof partition wall and a construction method thereof, and more particularly to a joint structure of a through joint in a lightweight fireproof partition wall of a dry construction method and a construction method thereof.

  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 fireproof partition wall of a dry construction method in which a wall surface is formed by installing a face material (gypsum board, calcium silicate board, etc.) having a predetermined thickness, material and number.

  In general, in a panel structure wall of a dry construction method formed from a heavy panel such as a PCa plate or an ALC plate, it is necessary to perform an airtight treatment or a watertight treatment on a seam generated at a joint portion between adjacent panels. The seam treatment of the panel structure wall is a joint having a configuration in which a string-like or tube-like elastic joint material or foam material is inserted or filled in the joint portion between the panels, and the surface layer portion of the joint portion is finished with a sealing material or the like as desired. Structure is adopted. This type of joint usually requires performance that does not impair the fire resistance of the entire panel structure wall, but the panel itself has a relatively thick plate thickness (for example, about 50 to 200 mm). Install or fill joints on joints, or adopt measures such as structurally devising the cross section of joints, thereby constructing fireproof joints that exhibit the desired fire resistance performance on the panel structure wall (Japanese Unexamined Patent Publication No. 63-32039, Japanese Unexamined Patent Publication No. 2007-70834, etc.).

  On the other hand, in a fire-resistant partition wall (hereinafter referred to as a “light-weight fire-resistant partition wall”) of a dry construction method in which a wall surface is formed by installing a face material (gypsum board, calcium silicate board, etc.) having a predetermined thickness, material, and number. Since the thickness of one face material is only about 5 to 30 mm, it is difficult to adopt a complicated joint structure such as a joint of a panel structure wall. The types of joints that are generally used on the walls of lightweight fireproof partition walls include: a joint joint that pushes the edges of the face materials against each other, a through joint that separates the edges of the face material at a predetermined interval, and a resin joiner Joiner joints that connect face materials with joint materials such as joint joints, sealing joints that are finished by filling a sealant such as an acrylic sealant in the joints of the see-through joints, etc. are mentioned, but with such a general joint structure In the joint portion, the fire resistance tends to be locally lowered or deteriorated.

  According to experiments by the present inventors, when a fireproof test is performed on a lightweight fireproof partition wall having a butt joint, the surface opposite to the surface to be heated (heating surface or heat receiving surface inside the furnace) (non-surface) On the heating surface or heat radiating surface), a phenomenon that hot air or hot gas blows out, leaks, or jets into the room from the minute gap generated at the joint (butt joint) of the surface material of the surface layer often occurs. In such a state, since the temperature of the joint portion and the vicinity thereof exceeds the allowable temperature (about 200 ° C.), desired fire resistance performance required for the fireproof partition wall cannot be obtained. This is because local fire resistance deterioration or loss occurs in the joints, and hot air leaks from the joints to the indoor side in the event of a fire, resulting in a local high temperature region occurring in or near the joints. to cause. Needless to say, this phenomenon occurs more remarkably in the see-through joint, but such a phenomenon also occurs in the joiner joint using a general-purpose joiner material.

  For this reason, when constructing this type of joint on a lightweight fireproof partition wall, the wall body in a state excluding the face material of the wall surface layer provided with joints ensures the desired fire resistance performance or has fire resistance performance. It is necessary to adopt measures to construct special joint materials on joints. In the former case, it is necessary to further construct an additional face material on the surface layer of the wall body to increase the number of face materials, so that the wall thickness and the construction cost increase. In the latter case, there is an advantage in that the wall thickness does not increase, but on the other hand, a special joint material or the like is required. As an example of the latter, the applicant of the present invention has applied a joint material formed by molding a metal plate into a predetermined shape, or a joint material formed by integrating a long and square incombustible material into a strip-shaped metal plate. Japanese Patent No. 4021156 proposes a joint structure having a structure inserted into the joint part. Further, it is possible to prevent a fire-resistant defect such as a joint part by using a sealing material or a joiner member having a fire-resistant performance, a heat-expandable fire-resistant material, or the like, as disclosed in JP-A-2005-290243, JP-A-2001-105517, 2006-97466 and JP-A-2006-9428.

  The present applicant has also proposed a fireproof partition wall having a configuration in which a face material such as a gypsum board or a calcium silicate plate is attached to only one side surface of a steel stud with respect to a lightweight fireproof partition wall in Japanese Patent Laid-Open No. 2002-369891. ing. As a result of repeatedly conducting a fire resistance test on the fireproof partition wall structure of this type, the applicant of the present invention has a structure or form of joints or joints between adjacent board materials as described above. Recognized a phenomenon that has an extremely large impact For this reason, when constructing this kind of lightweight fireproof partition wall, after applying a glass fiber reinforcing tape etc. to the indoor side surface of the joint, the surface of the joint is finished smoothly with a joint compound, etc. Measures have been taken to substantially completely close the joints to ensure the desired fire resistance. The present applicant also forms a gap behind the face material and a concealing groove between the upper face material and the lower face material as an improved technique of such a lightweight fireproof partition wall structure, and uses the sealing material as a gap behind the face material and Japanese Patent Application Laid-Open No. 2010-59634 proposes a fireproof partition wall structure formed by press-fitting or filling a concealing groove.

JP 63-32039 A JP 2007-70834 A Japanese Patent No. 4021156 JP 2005-290243 A JP 2001-105517 A JP 2006-97466 A JP 2006-9428 A JP 2002-369891 A JP 2010-59634 A

  Lightweight fireproof partitions with painted or cross-finished walls have been constructed in many buildings. In such a partition wall, when an external force such as an earthquake acts on the partition wall, there is a concern that a crack may be generated in the coating film or a defect such as a twist of a cross may occur. For this reason, in order to avoid the occurrence of cracks in the coating film, twisting of the cloth, etc. in advance for partition walls exceeding 10 m in length, such as corridors, etc. There is a potential demand for architects or construction workers who want to form a see-through joint.

  In order to form a see-through joint on the lightweight fireproof partition wall, it is also possible to construct an additional face material on the surface of the wall body and ensure the desired fire resistance performance with the wall body without this face material. Although it is conceivable, as described above, with such a partition wall, as the number of face materials on the wall surface increases, the wall thickness increases, and there is a problem that the material cost of the partition wall, the work man-hour, the work period, etc. increase. .

  On the other hand, as mentioned above, it is also possible to construct a joint with a special structure or material joint material, etc., but this also increases the material cost, work man-hours, construction period, etc. of the partition wall It becomes.

  Therefore, it is possible to easily form a joint on the wall surface of the lightweight fire-resistant partition wall without additional construction of face materials and without using special fire-resistant joint materials, fire-resistant joiners, etc. It is desirable to develop.

  The present invention has been made in view of such problems, and the object of the present invention is not to additionally construct a face material, and it is also possible to use a special fireproof joint material, fireproof joiner, etc. The present invention is to provide a joint structure for a lightweight fireproof partition wall and a construction method thereof, which can easily form a joint through the wall surface of the lightweight fireproof partition wall.

In order to achieve the above object, the present invention provides a joint structure for a lightweight fireproof partition wall of a dry construction method in which a wall surface is formed by installing a lower surface material and an upper surface material,
The sides of adjacent contact the upholstery surface material to form a mutual spaced eyes watermarks joints, the eye watermarks joint grout a pointed joint of the underlayer surface material positioned in the eye watermarks joint eyes Underground hermetically treated with a sealing material across the width, and laying the strip material incombustible fibrous material having air permeability in the eye underground, concealed from the indoor space said purpose underground by the strip material, the strip of the sealing material The joint structure of the lightweight fireproof partition wall characterized by being inserted between the material and the underlaying surface material .

From another point of view, the present invention relates to a method for constructing joints in a lightweight fireproof partition wall of a dry construction method in which a wall surface is formed by installing a lower surface material and an upper surface material,
After by mutually spaced side surfaces of adjacent said upholstery surface material to form an eye watermarks joint, said purpose watermarks joints of the eye watermarks joint a pointed joint of the underlayer surface material positioned in the joint eyes Underground Airtight with a sealing material across the width, and then
There is provided a joint construction method for a lightweight fireproof partition wall, characterized in that a belt-like material of a non-combustible fiber material having air permeability is laid on the joint base, and the joint base is concealed from the indoor space by the strip material.

  According to the above-described configuration of the present invention, the see-through joint can divide the wall surface and divide the continuous surface of the interior finish material, resulting in the behavior and deformation of the wall during an earthquake, etc. It is possible to prevent the occurrence of cracks or twists on the continuous coating surface or the continuous cloth surface. In addition, the edge of the interior finish material such as paint or cloth applied on the surface of the upholstery can be extended through the joint joint, so that the edge of the interior finish material can be damaged or twisted. Etc. can be avoided.

  In addition, the hot gas flow in the fire space that attempts to blow through the joints at the time of a fire is regulated by the strip material. The belt-shaped material having air permeability prevents the hot gas from flowing into the joint at once, and gradually causes the hot gas to flow into the joint. For this reason, the temperature of the joint space gradually increases, but is considerably delayed as compared with the case where the strip-shaped material is not used. Therefore, according to the joint structure having the above-described configuration, the fire resistance performance of the lightweight fireproof partition wall is not greatly lowered or deteriorated. Therefore, the lightweight fireproof partition wall exhibits the fire resistance performance of the required fireproof time (1 hour fire resistance). Can do.

  Furthermore, according to the joint construction method of the present invention for constructing the joint structure described above, it is only necessary to airtightly treat only the joint joint width through the joint joint of the lower face material after the construction of the upper face material. This is extremely advantageous in terms of work and process control.

And according to the said structure of this invention, a sealing material prevents effectively that an excessive gap | interval generate | occur | produces in the joint part of an underlay surface material resulting from the gas pressure rise of a hot gas. Thus, according to the joint structure of the present invention provided with both the sealing material and the belt-like material, it is possible to considerably suppress the temperature rise in the joint space located in the non-fire space by the synergistic effect of the sealing material and the belt-like material. Therefore, the lightweight fireproof partition wall reliably exhibits the fireproof performance for the required fireproof time (1 hour fireproof). Further, according to the joint construction method of the present invention for constructing such joint structure, after the construction of the upper surface material, the abutting joint of the lower surface material is seen through and the airtight treatment is performed only over the joint width of the joint material. This is extremely advantageous in terms of work or process control.

  According to the joint structure and its construction method of the present invention, the face material is not additionally constructed, and a special fire-resistant joint material, a fire-resistant joiner, etc. are not used, and the wall of the lightweight fire-resistant partition wall is transparent. A joint can be easily formed.

FIG. 1 is a partial perspective view and a partial enlarged cross-sectional view of a partition wall having a joint structure according to a preferred embodiment of the present invention. 2 is a longitudinal sectional view and a partially enlarged longitudinal sectional view of the partition wall shown in FIG. 3A is a cross-sectional view taken along the line II of FIG. 1C, and FIG. 3B is a front view of the joint portion shown in FIG. FIG. 4 is a longitudinal sectional view, a front view, and a transverse sectional view showing the construction process of the underlaying face material. FIG. 5 is a longitudinal sectional view, a front view, and a transverse sectional view showing the construction process of the upper facing material. FIG. 6 is a longitudinal cross-sectional view, a front view, and a cross-sectional view showing a joint treatment process for a horizontal joint of an underlaying face material. FIG. 7 is a longitudinal cross-sectional view, a front view, and a horizontal cross-sectional view showing a joint treatment process for inserting the non-combustible belt-like material into the vertical joint of the joint. FIG. 8 is a longitudinal sectional view, a front view, and a transverse sectional view showing a finishing process in which an interior finishing material such as paint or cloth is applied to the top face material. FIG. 9 is a longitudinal sectional view and a transverse sectional view showing an outline of the fire resistance test of the partition wall shown in FIGS. FIG. 10 is a longitudinal sectional view and a transverse sectional view showing an outline of a fire resistance test on a partition wall in which construction of an underlay sealing material is omitted. FIG. 11 is a longitudinal sectional view and a transverse sectional view showing an outline of a fire resistance test related to a partition wall in which construction of the incombustible belt-like material is omitted. FIG. 12 is a longitudinal sectional view and a transverse sectional view showing an outline of a fire resistance test on a partition wall (Comparative Example 1) in which the construction of both the underlay sealing material and the noncombustible belt-like material is omitted. FIG. 13 is a longitudinal sectional view and a transverse sectional view showing an outline of a fire resistance test on a partition wall (Comparative Example 2) in which a putty material is filled in a horizontal joint of an underlaying face material in the partition wall shown in FIG. FIG. 14 is a cross-sectional view, a partially enlarged cross-sectional view, and a vertical cross-sectional view for explaining the principle of the joint structure of the present invention, and the partition wall structure is conceptually and roughly composed of an underlaying surface material and an upholstery surface material. Has been shown.

  According to a preferred embodiment of the present invention, the underlaying material and the upholstery surface material include gypsum board, reinforced gypsum board, structural gypsum board, sizing gypsum board, decorative gypsum board, ordinary hard gypsum board, gypsum board, A calcium silicate board, a cement board, etc. other than plaster-type face materials, such as a gypsum board containing glass fiber nonwoven fabric (glass tissue), can be used conveniently. Preferably, the incombustible belt-like material is made of felt or a plate of incombustible fiber material such as rock wool, glass wool or ceramic wool, and the sealing material is made of a urethane resin sealing material or a modified silicon sealing material.

  In a preferred embodiment of the present invention, the thickness of the gypsum board constituting the upper facing material is set to 9.5 mm or more, for example, 12.5 mm, and the thickness of the rock wool felt or the plate body is 2 mm. It is set in the range of ˜6 mm, preferably in the range of 3-5 mm, for example 4 mm. Preferably, the joint width of the see-through joint is set to a dimension equal to or smaller than the plate thickness of the upper face material. For example, when a gypsum board having a thickness of 12.5 mm is used as the upper face material, the see-through joint is used. The joint width is set to 12.5 mm or less.

  Preferably, the underlaying surface material is constructed in a horizontally stretched form, and the overlying face material is constructed in a vertically stretched form. When a gypsum board having a bevel edge is used as a face material, the V-shaped groove is formed on the joint bottom of the joint, so that the sealing material is filled in the V-shaped groove after the construction of the upper face material. The incombustible belt-like material is laid in a see-through joint after the sealing material is applied, and is held on the joint bottom of the see-through joint by the adhesiveness or adhesiveness of the seal material.

  Hereinafter, a partition wall structure according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a partial perspective view and a partial enlarged cross-sectional view showing a configuration of a partition wall having a joint structure according to a preferred embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of the partition wall shown in FIG. And FIG.

  As shown in FIG. 1 and FIG. 2, the partition wall 1 is a dry construction method fire-resistant partition wall constructed in a reinforced concrete structure building, that is, a lightweight fire-resistant partition wall, and on both sides of the partition wall 1, The indoor space R is partitioned or defined. Reinforced concrete floor structures F1 and F2 and beams B are shown in FIGS. 1 and 2 as a structural frame of a building. An end of the partition wall 1 in the wall core direction, that is, a terminal end (not shown) is connected to a column or a wall (not shown).

  As shown in FIG. 2, the lower end surface Ba of the beam B and the side surface Bd of the beam B are plastered by a plastering material Bc such as cement mortar to form an interior base surface such as a painted base or a cloth base made of a plaster finish. Is done. In this example, the lower end part of the partition wall 1 is supported by the floor structure F1 of the floor which constructs the partition wall 1, and the upper end part of the partition wall 1 is fixed to the beam B of the upper floor. You may fix the upper end part of the partition wall 1 to lower surfaces, such as a concrete floor slab which comprises the floor structure F2 of an upper floor. Moreover, you may fix the lower end part of the partition wall 1 to the floor surface of the double floor constructed | assembled on the floor structure F1.

  The partition wall 1 includes a lower runner 2 fixed on a floor structure F1 such as a floor slab by a fixture (not shown) such as an anchor, and a lower surface Ba of the beam B by a similar fixture (not shown). The upper runner 3 is fixed, and a plurality of studs 4 are vertically built between the upper and lower runners 2 and 3. The studs 4 are made of lightweight steel studs (light steel studs), and are aligned along the wall core. The lower surface material 5 and the upper surface material 6 are built on both sides of the stud 4. The upper end portion and the lower end portion of the lower face member 5 and the upper face member 6 are abutted against the lower surface Ba of the beam B and the upper surface of the floor structure F1. A substantially sealed concealing space is formed as a hollow layer (hollow part) 9 between the undersurface members 5 on both sides of the wall. If desired, a heat insulating and sound absorbing material 9 ′ (shown by a broken line in FIG. 2) is disposed in the hollow layer 9.

  As shown in FIG. 1, the underlaying surface material 5 is fixed to the stud 4 by a screw screw (tapping screw) 8 for fixing the board. The screws 8 are arranged at intervals of 200 mm or less, and are arranged along the studs 4. The underlaying surface material 5 is arranged in the horizontal direction, and the joints 20 of the underlaying surface material 5 extend vertically and horizontally (vertically and horizontally). The joint 20 includes a vertical joint 21 and a horizontal joint 22. As shown in FIG. 1B, the vertical joint 21 is a butt joint, and the end faces 51 of the underlaying surface materials 5 adjacent to the left and right are butted against each other. As shown in FIG. 2 (B), the horizontal joint 22 is also a butt joint similar to the vertical joint 21, and the side surfaces 52 of the underlaying surface members 5 adjacent to each other are abutted against each other. The underlaying material 5 is a reinforced gypsum board having side edges in the form of a standard bevel edge, and a V-shaped groove 23 is formed on the indoor side portion of the horizontal joint 22 by the bevel surface 53.

  The upper surface material 6 is fixed to the indoor side surface of the lower surface material 5 by staples and an adhesive (not shown). The upper face material 6 is a reinforced gypsum board having side edges in the form of a standard bevel edge, like the lower face material 5. As shown in FIG. 1, the upholstery surface material 6 is arranged in the longitudinal direction, and the joints 30 of the upholstery surface material 6 extend vertically and horizontally (vertically and horizontally). The joint 30 includes a vertical joint 31 and a horizontal joint 32. As shown in FIG. 1C, the vertical joint 31 is a see-through joint, and the side surfaces 62 of the upper facing material 6 adjacent to the left and right are separated from each other by a joint width W. An incombustible belt-like material 10 having a thickness of about 4 mm is laid on the joint bottom 33 of the vertical joint 31. On the other hand, the horizontal joint 32 is a butt joint, and the end surfaces 61 of the upper facing members 6 adjacent to each other in the vertical direction are butted against each other.

As members constituting the partition wall 1, for example, the following building materials are used.
・ Lower runner 2: Lightweight shape steel (steel runner) C-65mm × 40mm × 0.8mm
-Upper runner 3: Lightweight section steel (steel runner) C-65mm x 40mm x 0.8mm
・ Spacer 4: Lightweight steel (steel stud) C-65mm × 45mm × 0.8mm
・ Under surface material 5: Reinforced gypsum board ・ Thickness 12.5 mm (Yoshino Gypsum Co., Ltd. product “Tiger Board (registered trademark) type Z”), 910 mm × 1820 mm
・ Surface material 6: Reinforced gypsum board ・ Thickness 12.5 mm (Yoshino Gypsum Co., Ltd. product “Tiger Board (registered trademark) type Z”), 910 mm × 1820 mm
・ Insulation and sound absorbing material 9 ': Glass wool density 24kg / m ³・ Thickness 50mm
-Joint width W: 12.5mm

  As shown in FIG. 2, an interior finishing material 7 such as a coating film or cloth that constitutes the interior wall surface of the indoor space R is applied or adhered to the surface of the upholstery surface material 6. The interior finishing material 7 is continuous with the lower surface Ba and the side surface Bd of the beam B through a connecting portion (entrance corner portion) between the upper surface material 6 and the lower surface Ba of the beam B. Therefore, the interior finishing material 7 extends over the entire surface of the upper facing member 6 and the beam B.

  FIG. 3A is a cross-sectional view taken along a line II in FIG. FIG. 3B is a front view of the joint shown in FIG.

  FIG. 3A shows a horizontal joint 22 of the lower covering material 5 located behind the vertical joint 31 of the upper covering material 6. The V-shaped groove 23 formed by the bevel surface 53 is filled with the underlay sealing material 15 within the joint width W. As the underlay sealing material 15, a urethane resin sealant (for example, “Tiger U Tight” (registered trademark) manufactured by Yoshino Gypsum Co., Ltd.), a modified silicone sealant (for example, “Tiger Fireproof Sealant” manufactured by Yoshino Gypsum Co., Ltd.), etc. Can be suitably used. The indoor side surface of the lower seal material 15 is located in the same plane as the indoor side surface of the lower surface material 5, and the indoor side surface of the lower seal material 15 and the indoor side surface of the lower surface material 5 are substantially flush with each other. is there. If desired, the underlay sealing material 15 may be applied so that the indoor surface protrudes or rises toward the indoor side. Preferably, the specific gravity of the underlay sealing material 15 is 0.8 to 2.0, preferably 1.0 to 1.7, and more preferably 1.3 to 1.5.

The incombustible belt-like material 10 is laid in the vertical joint 31 and is held on the joint bottom 33 by the adhesiveness or adhesiveness of the underlay sealing material 15. The incombustible belt-like material 10 is made of an aggregate of incombustible fiber materials and has air permeability. Examples of non-combustible fiber materials include rock wool, glass wool, and ceramic wool. The non-combustible belt-like material 10 is made of such a non-combustible fiber material felt or plate, and its specific gravity is 80 to 250 kg / m ³ , preferably 150 to 220 kg / m ³ , more preferably 200 in consideration of the amount of passing hot gas. ˜220 kg / m ³ . As the incombustible belt-like material 10, “Tiger Rock Felt” (registered trademark) or “Tiger Joint Felt” (trademark pending) manufactured by Yoshino Gypsum Co., Ltd. can be suitably used. As shown in FIG. 1C, a face material rear gap 11 is formed between the lower face material 5 and the upper face material 6. The gap behind the face material 11 is determined by the thickness of an adhesive layer (not shown) between the face materials 5 and 6, but is generally 3 mm or less, and usually 2 mm or less. In the event of a fire, the hot gas in the fire space flows into the gap behind the face material 11 from the hollow portion 9 and tries to blow through the joints of the vertical joints 31 as shown in FIG. The material 10 functions to prevent the hot gas from flowing into the joints of the vertical joints 31 at a stretch, and to gradually allow the hot gas to flow into the joints of the vertical joints 31. That is, the incombustible belt-like material 10 restricts the hot gas from flowing into the joints of the vertical joints 31, and therefore the temperature rise in the joint space of the vertical joints 31 is delayed. Further, the underlay sealing material 15 prevents an excessive gap from being generated at or near the horizontal joint 22 due to an increase in the gas pressure of the hot gas in the fire side space.

  4-8 is the longitudinal cross-sectional view which shows the construction method of the vertical joint 31, the front view, and a cross-sectional view.

  FIG. 4 is a longitudinal sectional view, a front view, and a transverse sectional view showing the construction process of the underlaying face material. FIG. 4 shows a state in which the underlaying surface material 5 is fixed to the stud 4 with screw screws 8. A V-shaped groove 23 is formed by a bevel surface 53 in the horizontal joint 22 of the underlaying surface material 5.

  FIG. 5 is a longitudinal sectional view, a front view, and a transverse sectional view showing the construction process of the upper facing material. As shown in FIG. 5, the upper surface material 6 is fixed to the indoor side surface of the lower surface material 5 by staples and an adhesive (not shown). The upper facing member 6 is disposed such that the side surfaces 62 are separated by a joint width W, and a vertical joint 31 is formed between the left and right side surfaces 62. The horizontal joint 22 of the underlaying face material 5 is exposed at the joint bottom 33 of the vertical joint 31.

  FIG. 6 is a longitudinal sectional view, a front view, and a transverse sectional view showing a hermetic treatment process for a horizontal joint of an underlaying surface material, and FIG. 7 is a strip-shaped material for inserting a non-combustible strip-like material into a vertical joint of the joint. It is the longitudinal cross-sectional view which shows a laying process, a front view, and a cross-sectional view. As shown in FIG. 6, the horizontal sealing material 15 of the lower surface material 5 is filled with the lower sealing material 15 over the joint width W. Further, the incombustible belt-like material 10 is laid in the vertical joint 31 as shown in FIG. The incombustible belt-like material 10 is pushed into the vertical joint 31 using a jig such as a plate material, and is held on the joint base 33 by the adhesiveness or adhesiveness of the underlay sealing material 15.

  FIG. 8 is a longitudinal sectional view, a front view, and a transverse sectional view showing a finishing process in which an interior finishing material such as paint or cloth is applied to the top face material. An interior finishing material 7 (indicated by oblique lines) such as a coating film or cloth is applied to the surface of the upholstery surface material 6, and the edge of the interior finishing material 7 extends into the vertical joint 31, and the upholstery surface material 6 terminates at side 62. Since the edge of the interior finishing material 7 terminates in the joint, damage to the edge of the interior finishing material 7, sag, and the like can be avoided.

  Thus, the undersea seal material 15 is filled in the V-shaped groove 23 of the horizontal joint 22 intersecting the vertical joint 31 and the non-combustible belt-like material 10 is laid on the joint bottom 33 of the vertical joint 31. Formed. Moreover, since the interior finishing material 7 can be divided by the vertical joint 31 and the continuous surface of the interior finishing material 7 can be reliably divided, cracks or twists caused by the behavior / deformation of the wall during an earthquake or the like can occur. Occurrence on the continuous coating surface or continuous cloth surface can be reliably prevented. As a result of the fire resistance test of the present inventors, it has been found that the vertical joint 31 having the above structure does not impair the fire resistance performance required for the partition wall 1. Hereinafter, the fire resistance performance of the partition wall 1 will be described.

  FIG. 9 is a longitudinal sectional view and a transverse sectional view showing an outline of the fire resistance test of the partition wall 1. FIG. 10 is a longitudinal sectional view and a transverse sectional view showing an outline of a fire resistance test on the partition wall 1 ′ in which the construction of the underlay sealing material 15 is omitted. FIG. 11 is a longitudinal sectional view and a transverse sectional view showing an outline of a fire resistance test on the partition wall 1 ″ in which the construction of the incombustible strip material 10 is omitted. FIG. 12 is a plan view of the underlay seal material 15 and the incombustible strip material 10. It is the longitudinal cross-sectional view and horizontal cross-sectional view which show the outline of the fireproof test regarding the partition wall 100 (Comparative example 1) which abbreviate | omitted both constructions. It is the longitudinal cross-sectional view which shows the outline | summary of the fireproof test regarding the partition wall 101 (Comparative example 2) with which it filled in the V-shaped groove | channel 23, and a cross-sectional view.

  In each figure, α and β indicate temperature measurement points on the non-heated surface, and the rising temperatures of the measurement points α and β measured in the fire resistance test are also shown. The measurement is performed using a thermocouple, and the measurement points α and β specifically indicate the installation position of each thermocouple.

  The positions of the temperature measurement points α and β in each figure are as follows.

(1) The temperature measurement point α shown in FIGS. 9 and 10 is the indoor side surface of the incombustible belt-like material 10 spaced upward from the horizontal joint 22, and the temperature measurement point β is the incombustible belt-like shape located in the immediate vicinity of the horizontal joint 22. It is an indoor side surface of the material 10.

(2) The temperature measurement point α shown in FIG. 11 is the indoor side surface of the joint bottom 33 spaced upward from the horizontal joint 22, and the temperature measurement point β is the indoor side surface of the underlay sealing material 15 filled in the horizontal joint 22. It is.
(3) The temperature measurement point α shown in FIG. 12 is the indoor side surface of the joint bottom 33 spaced upward from the horizontal joint 22, and the temperature measurement point β is the indoor side surface of the horizontal joint 22.

(4) The temperature measurement point α shown in FIG. 13 is the indoor side surface of the joint bottom 33 spaced upward from the horizontal joint 22, and the temperature measurement point β is the indoor side surface of the putty material 102 filled in the horizontal joint 22. is there.

   Since the lightweight fireproof partition wall is a non-bearing wall, the fireproof time required for the fireproof structure is one hour. Generally, in a fire resistance test, a wall specimen is installed in a fire resistance furnace (heating furnace), and the furnace temperature is raised according to a standard heating curve by the combustion operation of the furnace burner. The wall surface temperature on the non-heating side that does not face the burner, wall collapse, cracks, damage, etc. are measured or observed by a fire resistance test. In the 1 hour fire resistance test, the heating time is 1 hour, but the safety of the wall is confirmed by observation after 3 hours from the end of heating, and the initial temperature (room temperature) at the start of the fire resistance test. It is determined whether or not the rising temperature of the wall surface temperature on the non-heating side with respect to (1) meets the following conditions.

B) The average rising temperature does not exceed 140 ° C. (the surface temperature does not reach 160 ° C. (room temperature + 140 ° C.)).
B) The maximum rising temperature does not exceed 180 ° C (the surface temperature does not exceed 200 ° C (room temperature + 180 ° C)).

  When a joint is formed through the upper surface member 6 in the two-sided hollow partition wall 1 composed of the lower surface material 5 and the upper surface material 6, the joint bottom portion is a single sheet of the lower surface material 5. Since it becomes a structure, it becomes a fireproof weak point, ie, a fireproof defect. For this reason, the fire resistance performance of each partition wall 1, 1 ', 1 ", 100, 101 shown in FIGS. 9-13 is substantially based on the measured value of the rising temperature at the temperature measurement points α, β located in the joint bottom portion. Can be evaluated.

  As shown in FIG. 9, in the fire resistance test on the partition wall 1 of this example, the rising temperatures of the temperature measurement points α and β were 72 ° C. and 76 ° C. Moreover, the average rise temperature of the non-heating side surface of the partition wall 1 was 73 degreeC. Therefore, the partition wall 1 was adapted to the above-described determination condition regarding the rising temperature. In addition, the partition wall 1 was not observed to be collapsed, cracked, damaged, etc. Therefore, it was recognized that the partition wall 1 exhibited the fire resistance performance of 1 hour fire resistance required for a lightweight fireproof partition wall.

  As shown in FIGS. 10 and 11, in the partition walls 1 ′ and 1 ″ in which one of the incombustible belt-like material 10 or the underlay sealing material 15 is omitted, the temperature rises at the temperature measurement points α and β are 72 to 171 ° C. Yes, the average rise temperature of the non-heated side surface was 77 to 78 ° C. Therefore, the partition walls 1 ′ and 1 ″ met the above-described determination condition regarding the rise temperature. Moreover, the partition walls 1 ′, 1 ″ were not observed to collapse, cracked, damaged, etc. Therefore, it was recognized that the partition walls 1 exhibited the fire resistance performance of 1 hour fire resistance required for a lightweight fireproof partition wall. .

  On the other hand, in the partition wall 100 of Comparative Example 1 (FIG. 12) in which the construction of both the underlay sealing material 15 and the incombustible belt-like material 10 is omitted, the rising temperature of the temperature measurement point α is 141 ° C. The rising temperature was 245 ° C. Moreover, the average rise temperature of the non-heating side surface of the partition wall 100 was 99 degreeC. Therefore, it was recognized that the partition wall 100 does not meet the above-described determination condition regarding the rising temperature (maximum rising temperature <180 ° C.), and does not exhibit the fire resistance performance of 1 hour fire resistance required for the lightweight fireproof partition wall.

  Further, in the partition wall 101 in which the putty material 102 such as joint cement is filled in the V-shaped groove 23 of the horizontal joint 22 in the partition wall 100, the temperature measurement point α rises at 141 ° C., and the temperature measurement point β The rise temperature of was 202 ° C. Moreover, the average rising temperature of the non-heating side surface of the partition wall 101 was 91 degreeC. Therefore, it was recognized that the partition wall 101 does not meet the above-described determination condition regarding the rising temperature (maximum rising temperature <180 ° C.) and does not exhibit the fire resistance performance of 1 hour fire resistance required for the lightweight fireproof partition wall.

  FIG. 14 is a cross-sectional view, a partially enlarged cross-sectional view, and a vertical cross-sectional view for explaining the principle of the joint structure of the present invention.

  FIG. 14 shows a situation where a fire has occurred in one room. The hot gas G generated by the fire flows into the hollow portion 9 of the partition wall 1. The hot gas G in the hollow portion 9 flows into the gap behind the face material 11 through the vertical joints 21 and the horizontal joints 22 of the underlaying face material 5 as indicated by broken arrows. The hot gas G that has flowed into the gap behind the face material 11 tries to blow into the joint space of the vertical joint 31 as indicated by the broken arrow. The hot gas G also tends to blow through the horizontal joint 22 into the joint space of the vertical joint 31. For this reason, in the partition wall 100 of the comparative example 1 shown in FIG. 12, it is thought that the rise temperature of the joint space of the vertical joint 21 exceeded 200 degreeC. Further, in the partition wall 101 of the comparative example 2 shown in FIG. 13, the hot gas G is initially prevented from flowing out into the joint space of the vertical joint 31 by the putty material 102. It is considered that the hot gas G flows into the joint space at a stretch due to damage or the like, and as a result, the temperature of the joint space of the vertical joint 21 rapidly increases, and the temperature of the joint space exceeds 200 ° C.

  On the other hand, the incombustible belt-like material 10 not only prevents the hot gas G from flowing out into the joints of the vertical joints 31 at a stretch, but also causes the hot gas G to gradually flow out into the joint spaces of the vertical joints 31 due to its air permeability. . Although the temperature of the joint space in the vertical joint 31 gradually increases, the temperature rise in the joint space of the vertical joint 31 is considerably delayed as compared with Comparative Examples 1 and 2. It is considered that the temperature rise of the joint space of the vertical joint 31 is suppressed in the partition walls 1 and 1 ′ shown in FIGS. The underlay sealing material 15 prevents the hot gas G from being blown from the horizontal joint 32 into the room at a stretch, and does not form large cracks or the like in the horizontal joint 32 unlike the putty material 102 even during thermal deterioration. That is, in the partition wall 1 ″ shown in FIG. 11, the underlay sealing material 15 prevents the occurrence of an excessive gap at or near the horizontal joint 22 due to the increase in the gas pressure of the hot gas. It is considered that the temperature rise in the 31 joint space could be suppressed.

  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. It goes without saying that it is possible.

  For example, the partition wall in the above embodiment is formed with the vertical joint of the upholstery face material formed through the joint, but it is also possible to form the horizontal joint of the upholstery face material through the joint joint. .

  Further, in the above-described embodiment, the lower surface material and the upper surface material are gypsum-based surface materials having bevel edges, but gypsum-based surface materials having a taper edge or a square edge are used as the lower surface material and the upper surface material. May be.

  Furthermore, gypsum board (trade name “Tiger Board” (registered trademark, product of Yoshino Gypsum Co., Ltd.)) and hard / high-strength gypsum board (trade name “Tiger Super Hard” (registered) Trademark, product of Yoshino Gypsum Co., Ltd.), super-hard and high-strength gypsum board (trade name “Tiger Hyper Hard C” (registered trademark, (Product of Yoshino Gypsum Co., Ltd.)), structural gypsum board, sizing gypsum board, makeup Gypsum board products such as gypsum board, gypsum board with glass fiber non-woven fabric (trade name “Tiger Glass Rock” (registered trademark, product of Yoshino Gypsum Co., Ltd.)), slag gypsum board (trade name “Asunon” (registered trademark, NB Corporation) Products), etc.), cement boards ("Delacrete" (registered trademark, product of United States Gypsum Co., Ltd.), etc.), gypsum boards with fibers (products) "Efujibodo" (CO., LTD A & Materials products), etc.), extrusion molding plate (trade name "Kourion studless panel" (Kourion, Inc. products), etc.), may be used calcium silicate plate or the like.

  The structure of the joint structure of the present invention is not only a shaft structure having a steel stud (spacer) and a hollow lightweight fireproof partition wall, but also a hollow lightweight fireproof partition wall using a wooden stud, a non-stud structure or The present invention can be applied to a hollow lightweight fireproof partition wall having a studless structure or a lightweight fireproof partition wall having a structure in which a face material is attached only to one side surface of a steel stud.

  Furthermore, as the noncombustible belt-like material, felt or plate such as glass wool or ceramic wool may be used in addition to rock wool felt or plate.

  INDUSTRIAL APPLICABILITY The present invention is applied to a joint structure provided in a fireproof partition wall of a dry construction method in which a lower surface material and an upper surface material are built to form wall surfaces on both sides, and a construction method thereof. According to the joint structure and its construction method of the present invention, the face material is not additionally constructed, and a special fire-resistant joint material, a fire-resistant joiner, etc. are not used, and the wall of the lightweight fire-resistant partition wall is transparent. Since the joints can be easily formed, it is extremely advantageous practically.

1, 1 ', 1 "Lightweight fireproof partition wall 2 Lower runner 3 Upper runner 4 Column 5 Lower surface material 6 Upper surface material 7 Interior finishing material 8 Screw screw 9 Hollow portion 10 Noncombustible belt material (band material of noncombustible fiber material)
15 Under seal material 20, 30 Joint 21, 31 Vertical joint 22, 32 Horizontal joint 23 V-shaped groove 33 Joint bottom R Indoor space G Hot gas

Claims (12)

In the joint structure of the lightweight fireproof partition wall of the dry construction method that forms the wall surface by installing the underlaying surface material and the upper surface material,
The sides of adjacent contact the upholstery surface material to form a mutual spaced eyes watermarks joints, the eye watermarks joint grout a pointed joint of the underlayer surface material positioned in the eye watermarks joint eyes Underground hermetically treated with a sealing material across the width, and laying the strip material incombustible fibrous material having air permeability in the eye underground, concealed from the indoor space said purpose underground by the strip material, the strip of the sealing material A joint structure of a lightweight fireproof partition wall, which is interposed between a material and the underlaying surface material . The joint structure according to claim 1 , wherein the under-surface material and the upper-surface material have the same plate thickness. The joint structure according to claim 1 or 2 , wherein the underlaying material is a gypsum board having a thickness of 12.5 mm. The joint structure according to claim 1 or 2 , wherein the lower surface material and the upper surface material are gypsum boards having a thickness of 12.5 mm. The joint structure according to any one of claims 1 to 4, wherein the belt-shaped member is made of rock wool felt or a plate having a thickness in a range of 2 to 6 mm. The joint structure according to any one of claims 1 to 5, wherein the sealing material is made of a urethane resin-based sealing material or a modified silicon-based sealing material. In the construction method of joints in the lightweight fireproof partition wall of the dry construction method of building the wall surface by building the lower surface material and the upper surface material,
After by mutually spaced side surfaces of adjacent said upholstery surface material to form an eye watermarks joint, said purpose watermarks joints of the eye watermarks joint a pointed joint of the underlayer surface material positioned in the joint eyes Underground Airtight with a sealing material across the width, and then
A joint construction method for a lightweight fireproof partition wall, characterized in that a belt-like material made of a non-combustible fiber material having air permeability is laid on the joint base, and the joint base is concealed from the indoor space by the strip material. The joint construction method according to claim 7 , wherein the lower surface material and the upper surface material have the same plate thickness. The joint construction method according to claim 7 or 8 , wherein the underlaying material is a gypsum board having a thickness of 12.5 mm. The joint construction method according to claim 7 or 8 , wherein the lower surface material and the upper surface material are gypsum boards having a thickness of 12.5 mm. 11. The joint construction method according to claim 7 , wherein the belt-shaped member is formed of rock wool felt or a plate having a thickness in a range of 2 to 6 mm. The joint construction method according to any one of claims 7 to 11, wherein the sealing material is made of a urethane resin-based sealing material or a modified silicon-based sealing material.

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