JP2016023510A - Corner structure of dry wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fire resistance and sound insulating properties by a simple configuration.SOLUTION: A corner structure of a dry wall includes: a first stud (21a) for supporting a first board member (41a); a second stud (21b) for supporting a second board member (41b) orthogonal to the first board member (41a); and an L-shaped incombustible substrate member (6). The substrate member (6), which is fixed to the first and second studs (21a) and (21b), has a first surface (61) to which the first board member (41a) is attached, and a second surface (62) to which the second board member (41b) is attached.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a corner structure of a dry wall, and more particularly to a structure of a corner portion of a dry wall having a column at a central position.

  Conventionally, techniques for improving the sound insulation and fire resistance of the drywall have been proposed.

  For example, Japanese Patent No. 4241322 (Patent Document 1) discloses a wall structure in which a plurality of studs are arranged in a staggered manner in order to reduce the influence of a sound bridge.

  Japanese Patent Application Laid-Open No. 2007-32433 (Patent Document 2) discloses a long angle made of a metal or the like at the entrance and exit corners of the corner portion in order to reduce the influence of the sound bridge at the corner portion of the sound insulation wall. It is disclosed that each member is provided and a piece-like vibration insulating material is provided between the angle members.

  Japanese Patent No. 5338734 (Patent Document 3) discloses the use of a light iron thin plate in order to improve the fire resistance of a steel column.

Japanese Patent No. 4241322 JP 2007-32433 A Japanese Patent No. 5338734

  As described above, in Patent Document 2, the board member (face material) on one side and the other side orthogonal to each other in the corner portion is fixed to the nonflammable angle member. Therefore, the fire resistance in the corner portion can be improved. However, it may be difficult to provide a piece-like vibration insulating material between the angle members at the entrance corner and the exit corner, such as when a column is installed at the center of the corner portion. There has also been a desire to improve the sound insulation at the corner with a simple configuration.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a dry wall corner structure that can improve fire resistance and sound insulation with a simple configuration. That is.

  A corner structure of a drywall according to an aspect of the present invention is a structure of a corner portion of a drywall in which a first board member and a second board member are arranged orthogonal to each other, and the first board member A first stud for supporting the second board member, a second stud for supporting the second board member, and an L-shaped incombustible base member. The base member has a first surface to which the first board member is attached and a second surface to which the second board member is attached, and is fixed to the first stud and the second stud.

  Preferably, the base member is an iron plate.

  Preferably, the corner structure of the drywall has a third stud for supporting the third board member that faces the first board member with a space therebetween, and a second stud that faces the second board member. And a fourth stud for supporting the fourth board member. In this case, the first stud and the second stud are disposed away from the third board member and the fourth board member, respectively, and the third stud and the fourth stud are respectively disposed on the first board. Desirably, they are spaced apart from the member and the second board member.

  The base member may be disposed on the corner side of the corner portion, and the third board member and the fourth board member may be orthogonal to each other on the corner side. In this case, the corner structure of the drywall has a first surface to which the third board member is attached and a second surface to which the fourth board member is attached. A corner base member may be further provided.

  Preferably, the first surface and the second surface of the base member are provided with locking pieces that contact the side surfaces of the first stud and the second stud for positioning the base member.

  Each locking piece is cut and raised from the first surface or the second surface of the base member, and it is desirable that the side surface abuts on the first stud or the second stud.

  Preferably, a double-sided tape is affixed in advance to the first surface and the second surface of the base member, and the base member is fixed to the first stud and the second stud by the double-sided tape.

  According to the present invention, it is possible to improve the fire resistance and sound insulation of the corner portion of the drywall with a simple configuration.

It is a longitudinal cross-sectional view which shows the example of a basic structure of the dry type wall in embodiment of this invention. It is a fragmentary sectional view of the dry type wall at the time of cut | disconnecting by the II-II line | wire of FIG. It is a cross-sectional view which shows the example of arrangement | positioning of the stud of the dry type wall in embodiment of this invention. It is a conceptual diagram which shows the propagation image of the sound in a ceiling part in the dry type wall of embodiment of this invention. It is a cross-sectional view which shows the structural example of the corner part of the dry type wall which concerns on embodiment of this invention. In embodiment of this invention, it is the perspective view which looked at the corner part of the state before a surface member is attached from the entrance corner side. It is a perspective view which shows the base | substrate member by the side of a corner in embodiment of this invention. In embodiment of this invention, it is the perspective view which looked at the corner part of the state before a surface member is attached from the protrusion corner side. It is a perspective view which shows the base | substrate member by the side of a protrusion corner in embodiment of this invention. It is a cross-sectional view which shows the structural example of the corner part of the dry type wall which concerns on the modification 1 of embodiment of this invention. It is a cross-sectional view which shows the structural example of the corner part of the drywall which concerns on the modification 2 of embodiment of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  Prior to the description of the corner structure of the drywall according to the present embodiment, first, an example of the basic structure of the drywall 1 will be described with reference to FIGS.

  The dry wall 1 is arranged to extend from the ceiling to the floor in order to partition adjacent spaces (rooms). The dry-type wall 1 is assumed to be a boundary wall (door wall) in a building in which dwelling units such as apartment houses, tenement houses, and dormitories are continuous, or a partition wall that requires high sound insulation such as a music room. In the present embodiment, a virtual line that partitions adjacent spaces in the cross section is referred to as a “partition line”. In the present embodiment, the direction orthogonal to the partition line is referred to as “front and back direction”.

  As an example, the dry wall 1 of the present embodiment adopts the dry wall structure proposed in Japanese Patent Application No. 2012-276165. In FIG. 1 and FIG. 2, the right side of the drawing will be described as a first space and the left side of the drawing will be described as a second space. Moreover, the imaginary line A1 in FIG. 2 shows a partition line, and arrow A2 has shown the front and back direction.

  As shown in FIG. 1 and FIG. 2, the drywall 1 includes a base member 2 arranged so as to extend from the ceiling to the floor along the partition line, and one side and the other side of the base member 2, respectively. And a surface member 4 to be fixed.

  The base member 2 includes a plurality of studs 21 arranged at intervals on the first space side and a plurality of studs 22 arranged at intervals on the second space side. These studs 21 and 22 are linearly aligned on the first space side and the second space side, respectively. Each of the studs 21 and 22 is made of steel, and the shape of the cross section is, for example, a substantially rectangular shape having a short side of 45 mm and a long side of 65 mm. In the present embodiment, the surface of the stud 21 on the first space side and the surface of the stud 22 on the second space side, that is, the side surface in contact with the surface member 4 are referred to as “surface”. The surface on the second space side of the stud 21 and the surface on the first space side of the stud 22, that is, the side surface opposite to the surface is referred to as “back surface”.

  The base member 2 is also a pair of runners 31 and 33 arranged so as to hold both axial ends of the plurality of studs 21 and a pair of runners arranged so as to hold both axial ends of the plurality of studs 22. 32, 34. The runners 32 and 34 on the second space side are arranged with a predetermined gap from the runners 31 and 33 on the first space side in the front and back direction.

  Each of the upper runner 31 and the runner 32 has a downward ridge at both ends in the front and back direction. The inner side surface of the runner 31 is in contact with the front and back surfaces of the stud 21, and the inner side surface of the runner 32 is in contact with the front and back surfaces of the stud 22. Thereby, the end parts on the ceiling side of the studs 21 and 22 are completely held by the runners 31 and 32, respectively. Each of the lower runner 33 and the runner 34 has an upward hook at both front and back direction ends. The inner side surface of the runner 32 is in contact with the front surface and the back surface of the stud 21, and the inner side surface of the runner 34 is in contact with the front surface and the back surface of the stud 22. As a result, the floor-side ends of the studs 21 and 22 are completely held by the runners 32 and 34, respectively.

  The upper runners 31 and 32 and the lower runners 33 and 34 are respectively fixed to ceilings and floor beams 91 and 92 of the building made of, for example, H-shaped steel. Alternatively, the lower runners 33 and 34 are fixed to the foundation as the foundation of the building.

  Thus, in this Embodiment, two runners are provided independently in the front and back direction for every attachment place. Therefore, as shown in FIG. 4, the sound S generated in the space on one side is cut off in the gap 3 between the runners 31 and 32, for example, also on the ceiling side to avoid propagation to the space on the other side. Can do. As a result, according to the dry type wall 1 in the present embodiment, a general sound insulating wall, that is, a plurality of studs arranged in a staggered manner is higher in sound insulation than a dry type wall that is held by one runner at each installation location. Can meet sex demand.

  As shown in FIGS. 2 and 3, the studs 21 and 22 are arranged on the weak axis. That is, the studs 21 and 22 are arranged so that the short sides thereof are parallel to the direction orthogonal to the surface member 4 (front and back direction). Thereby, even if it provides a runner independently for every front-and-back direction for every attachment place, it can avoid that the thickness of the dry-type wall 1 increases.

  In the present embodiment, the adjacent stud 21 and stud 22 are arranged with their back surfaces facing each other so as to overlap in the front and back direction. Such an arrangement form is expressed as “back to back” in the present embodiment. Further, “adjacent” means that they are closest to each other, and is not limited to the meaning of contacting each other. Each of the studs 21 and 22 is preferably an open cross section having an opening on the back side rather than a closed cross section in consideration of sound insulation.

  For example, glass wool is provided as the sound absorbing material 53 on one side and the other side of the column 51. A sound absorbing material 53 is also provided between two pairs of studs 21 and 22 adjacent in the alignment direction.

  Referring to FIGS. 1 and 3, each surface member 4 includes, for example, a gypsum board 41 disposed on the base member 2 side and a reinforced gypsum board 42 disposed exposed on the space side. . The reinforced gypsum board 42 is a gypsum board (netted reinforced gypsum board) in which glass fibers and the like are mixed in order to enhance fire resistance. The reinforced gypsum board 42 is desirably larger than the thickness of the gypsum board 41. Specifically, the thickness of the gypsum board 41 is, for example, 9.5 mm, and the thickness of the reinforced gypsum board 42 is, for example, 15 mm.

(About the corner structure)
Next, an example of the structure of the corner portion of the dry wall 1 will be described.

  With reference to FIG. 5, the corner portion 10 of the drywall 1 is, for example, an L-shaped corner having an entrance corner 11 and an exit corner 12, and a column 52 is disposed at the center position thereof. The column 52 is a cylindrical member having a rectangular cross section, and one side thereof is smaller than the thickness dimension L <b> 1 of the base member 2. The column 52 is fixed on the building foundation 92A or the beam 92 (FIG. 1) by a rectangular plate member 520 connected to the lower end thereof.

  In the present embodiment, it is assumed that the first space is located on the entrance corner 11 side and the second space is located on the exit corner 12 side. Therefore, the surface member 4 orthogonal to the entry corner 11 is supported by the stud 21, and the surface member 4 orthogonal to the exit corner 12 is supported by the stud 22.

  Thus, when the column 52 is installed in the center of the corner portion 10, the stud on one side and the stud on the other side cannot be arranged in contact with each other at either the entrance corner 11 or the exit corner 12. Therefore, in such a case, the surface member 4 is generally attached to a wooden base fixed to the column 52. However, if it does so, the fire resistance and sound insulation of a corner part will fall.

  On the other hand, in the present embodiment, the base members 6 and 7 for attaching the surface member 4 are iron plates in both the entrance corner 11 and the exit corner 12 of the corner portion 10. The base member 6 on the corner 11 side is not fixed to the column 52 but to the pair of studs 21 located on one side and the other side. Thereby, the fire resistance and sound insulation of the corner part 10 of the dry type wall 1 are improved.

  Hereinafter, the base member 6 on the entrance corner 11 side and the base member 7 on the exit corner 12 side will be described in detail. In FIG. 5, in order to make it easy to understand each position of the surface member 4, the reference numeral of the one-side surface member 4 located in the entrance corner 11 is “4a”, and the reference numeral of the other-side surface member 4 is “ 4b ". Similarly, the reference numeral of the one-side surface member 4 located at the protruding corner 12 is “4c”, and the reference numeral of the other-side surface member 4 is “4d”. In addition, for the board members (gypsum boards 41 and 42) included in each surface member 4, corresponding to the reference numerals of the surface members 4, the reference numerals of the one side board member and the other side board member located in the corner 11 respectively. “A” and “b” are added, and “c” and “d” are added to the codes of the board members on one side and the other side located at the protruding corner 12, respectively.

  First, with reference to FIGS. 5 to 7, a configuration and an arrangement example of the base member 6 on the entrance corner 11 side will be described. FIG. 6 is a perspective view of the corner portion 10 in a state before the surface member 4 is attached as viewed from the entrance corner 11 side. FIG. 7 is a perspective view of the base member 6 as seen from the back side (outside corner 12 side) at the entrance corner 11.

  The base member 6 disposed in the corner 11 is fixed to a pair of studs 21a and 21b that support the surface members 4a and 4b orthogonal to each other. The stud 21a represents the stud disposed on the most column 52 side among the studs 21 constituting the wall on one side, and the stud 21b is disposed on the most column 52 side among the studs 21 constituting the wall on the other side. Represents the studs made.

  The base member 6 is L-shaped and has a first surface 61 and a second surface 62. The surface member 4a (more specifically, gypsum board 41a) is attached to the first surface 61, and the surface member 4b (more specifically, gypsum board 41b) is attached to the second surface 62. The base member 6 is formed, for example, by bending a single iron thin plate.

  The base member 6 extends in the vertical direction, and is disposed so as not to overlap the flanges of the upper and lower runners 31 and 33. In order to facilitate handling, the base member 6 may be divided in the vertical direction. In such a case, there may be a gap between the base members 6 adjacent in the vertical direction.

  In the base member 6, a part of the back side of the first surface 61 (end in the lateral width direction) abuts on the surface of the stud 21 a, and a part of the back side of the second surface 62 (end in the lateral width direction) It contacts the surface of 21b. In the present embodiment, approximately half of the surfaces of the studs 21a and 21b are in contact with the first and second surfaces 61 and 62 in the lateral width direction. The entire lateral width of the surface of the studs 21a and 21b may be in contact with the first and second surfaces 61 and 62.

  As shown in FIG. 7, a double-sided tape 64 is pasted in advance on the back side of the first surface 61 and the second surface 62 of the base member 6. Therefore, the base member 6 can be easily fixed (temporarily fixed) to the studs 21a and 21b by the double-sided tape 64.

  The main fixing of the base member 6 to the studs 21a and 21b is performed by using a nail member (not shown) such as a screw for fixing the gypsum boards 41a and 41b to the studs 21a and 21b together with the gypsum boards 41a and 41b. It is realized by penetrating through. Further, for example, when the first and second surfaces 61, 62 of the base member 6 and the surfaces of the studs 21a, 21b overlap in a wide range in the width direction, the reinforced gypsum boards 42a, 42b are placed on the studs 21a, 21b. A nail member (not shown) for fixing may also penetrate the base member 6 together with the inner gypsum boards 41a and 41b.

  Here, the first surface 61 and the second surface 62 of the base member 6 are provided with locking pieces 63 that come into contact with the side surfaces of the studs 21 a and 21 b in order to position the base member 6. Specifically, each of the surfaces 61 and 62 is provided with a plurality of locking pieces 63 projecting to the back side with an interval in the vertical direction. Each locking piece 63 is cut and raised from the first surface 61 or the second surface 62 of the base member 6, and the side surface 63a abuts against the stud 21a or the stud 21b. The locking piece 63 is desirably cut upward or downward so as to be orthogonal to the side surface of the stud 21a, 21b on the column 52 side.

  As shown in FIG. 7, at the time of shipment of the base member 6, either the locking piece 63 of the first surface 61 or the locking piece 63 of the second surface 62 was laid down. The state is desirable. For example, when the locking piece 63 of the first surface 61 is laid down, the locking piece 63 of the second surface 62 that has been cut and raised is first applied to the side surface of the stud 21b. Make contact. In this state, the base member 6 can be easily fitted by hitting the cut portion of the first surface 61 with a hammer or the like and starting up.

  Next, with reference to FIG. 5, FIG. 8, and FIG. 9, a configuration and an arrangement example of the base member 7 on the protruding corner 12 side will be described. FIG. 8 is a perspective view of the corner portion 10 in a state before the surface member 4 is attached as viewed from the protruding corner 12 side. FIG. 9 is a perspective view of the base member 7 as viewed from the front side (protruding corner 12 side) at the protruding corner 12.

  The base member 7 disposed at the protruding corner 12 is fixed to the column 52. As shown in FIGS. 5 and 9, the base member 7 has first to sixth surfaces 71 to 76. A surface member 4c (more specifically, gypsum board 41c) is attached to the first surface 71, and a surface member 4d (more specifically, gypsum board 41d) is attached to the second surface 72. The third and fourth surfaces 73 and 74 are in contact with adjacent side surfaces of the column 52, respectively. The fifth surface 75 is orthogonal to the first surface 71 and the third surface 73, and the sixth surface 76 is orthogonal to the second surface 72 and the fourth surface 74. The base member 7 having such a shape may also be formed by bending a single iron thin plate.

  The base member 7 extends in the vertical direction, and is disposed so as not to overlap the flanges of the upper and lower runners 32 and 34. The base member 7 may also be divided in the vertical direction for easy handling.

  As shown in FIG. 9, a plurality of through holes 77 are provided in advance on the third and fourth surfaces 73 and 74 of the base member 7 at intervals in the vertical direction. The base member 7 is permanently fixed to the column 52 by a nail member (not shown) that passes through these through holes 77.

  The gypsum boards 41c and 41d are fixed to the first surface 71 and the second surface 72 of the base member 7 by nail members (not shown), respectively. The reinforced gypsum boards 42c and 42d are fixed to the first surface 71 and the second surface 72 of the base member 7 together with the gypsum boards 41c and 41d by nail members (not shown).

  As described above, in the present embodiment, the base member 6 for attaching the surface member 4 is fixed to the pair of studs 21a and 21b located on the corner 11 side. In this case, since a gap can be provided between the base member 6 on the entering corner 11 side and the column 52, the first space (entering corner 11 side) and the second space (exit corner 12 side) via the column 52 are provided. Sound transmission to and from can be blocked. That is, the sound insulation of the corner portion 10 can be enhanced with a simple configuration. Moreover, since the base member 6 is an iron plate, fire resistance is also improved.

  Moreover, since the locking piece 63 and the double-sided tape 64 are provided in the 1st surface 61 and the 2nd surface 62 of the base member 6, workability | operativity can also be improved.

  Furthermore, in the present embodiment, the stud 21 on the entrance corner 11 side and the stud 22 on the exit corner 12 side are held by individual runners for each mounting location. Therefore, since sound propagation through the runner is also blocked, the sound insulation of the entire corner portion 10 can be improved.

(Modification 1)
In the above embodiment, the base member 7 on the exit corner 12 side is fixed to the column 52, but the base member on the exit corner 12 side may be fixed to the pair of studs 22 as well as the entrance corner 11 side. Good. A structural example of the corner portion 10 of the drywall according to the first modification of the present embodiment is shown in FIG.

  As shown in FIG. 10, in this modification, the base member 8 is provided on the protruding corner 12 side. The base member 8 is fixed to a pair of studs 22a and 22b that support the surface members 4c and 4d orthogonal to each other on the protruding corner 12 side. The stud 22a represents the stud arranged on the most column 52 side among the studs 22 constituting one side wall, and the stud 22b is arranged on the most column 52 side among the studs 21 constituting the other side wall. Represents the studs made.

  The base member 8 may have the same configuration as the base member 6 on the entrance corner 11 side described above. That is, the base member 8 is L-shaped, and the first surface 81 to which the surface member 4c (more specifically, the gypsum board 41c) is attached and the surface member 4d (more specifically, the gypsum board 41d) are provided. And a second surface 82 to be attached. A part of the back side of the first surface 81 abuts on the surface of the stud 22a, and a part of the back side of the second surface 82 abuts on the surface of the stud 22b. The base member 8 is arranged in a state of being separated from the column 52.

  In addition, the first surface 81 and the second surface 82 of the base member 8 are provided with locking pieces 83 that contact the side surfaces of the studs 22a and 22b for positioning the base member 8. In addition, the base member 8 is fixed (temporarily fixed) to the studs 22a and 22b by a double-sided tape (not shown) attached in advance to the back side of the first surface 81 and the second surface 82.

  In this case, if the distance between the column 52 and the studs 22a and 22b is too wide, there is a concern that the strength of the base member 8 is insufficient. Therefore, the studs 22a and 22b on the exit corner 12 side are closer to the entrance corner 11 side. You may arrange | position in the position near the pillar 52 rather than the studs 21a and 21b. That is, the studs 21 and 22 may be arranged in a staggered manner instead of back to back.

(Modification 2)
In the above embodiment, the two rows of studs 21 and 22 are arranged on the weak axis. However, a plurality of studs may be arranged on the strong axis in a staggered manner like a general dry wall. An example of the structure of the corner 10 of the drywall according to the second modification of the present embodiment is shown in FIG.

  As shown in FIG. 11, in the present modification, a plurality of studs 121 and 122 are arranged in a staggered manner. Specifically, the stud 121 on the entrance corner 11 side is disposed away from the surface members 4c and 4d on the exit corner 12 side, and the stud 122 on the exit corner 12 side is disposed on the surface member 4a on the entrance corner 11 side. It is arranged away from 4b. In this case, the L-shaped base member 6 is fixed to the stud 121.

  The studs 121 and 122 are arranged in a strong axis and are held by a common runner for each mounting location. For example, the lower ends of the studs 121 and 122 are held by one runner 133 fixed on the foundation 92A. In this case, the spacer 135 is inserted into the gap between the studs 121 and 122 and the runner 133. Therefore, in this modified example, although a sound bridge is formed in the runner 133 portion, the sound insulation at locations other than the runner 133 can be maintained.

  In the above embodiment and each modification, the L-shaped base member 6 is disposed on the entrance corner 11 side. However, as in Modification 1, the L-shaped base member 6 is disposed on the exit corner 12 side. When the base member 8 is arranged, the base member on the corner 11 side may be configured and fixed to the column 52.

  Moreover, in the said embodiment and each modification, although the corner part 10 was L-shaped corner, the above-mentioned L-shaped base member 6 or 8 is applied also to a T-shaped corner or a cross corner. be able to.

  Moreover, in the said embodiment and each modification, although the structural example in which the pillar 52 is arrange | positioned in the center of the corner part 10 was shown, the base member 6 and the exit corner 12 by the side of the entrance corner 11 like the modification 1 were shown. When any of the base members 8 on the side is fixed to the studs 21 and 22, a structure without the column 52 may be used.

  The base members 6 to 8 are all iron plates, but other materials may be used as long as they are nonflammable plates.

  Moreover, you may combine the said modification 1, 2 suitably.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Dry wall, 2 foundation member, 3 clearance, 4, 4a, 4b, 4c, 4d surface member, 4 surface member, 6-8 ground member, 10 corner part, 11 entry corner, 12 exit corner, 21, 22, 21a , 21b, 22, 22a, 22b, 121, 122 Stud, 31, 32, 33, 34, 133 Runner, 41, 41a, 41b, 41c, 41d, Gypsum board, 42, 42a, 42b, 42c, 42d Reinforced gypsum board 51, 52 Pillar, 53 Sound absorbing material, 63, 83 Locking piece, 64 Double-sided tape, 77 Through hole, 91, 92, Beam, 92A foundation, 135 Spacer, 520 Plate material.

Claims (7)

The structure of the corner portion of the drywall in which the first board member and the second board member are arranged orthogonal to each other,
A first stud for supporting the first board member;
A second stud for supporting the second board member;
An L-shape that has a first surface to which the first board member is attached and a second surface to which the second board member is attached, and is fixed to the first stud and the second stud. The corner part structure of a dry-type wall provided with a non-combustible base member.   The corner structure of the drywall according to claim 1, wherein the base member is an iron plate. A third stud for supporting a third board member facing the first board member at an interval;
A fourth stud for supporting a fourth board member facing the second board member with a space therebetween;
The first stud and the second stud are disposed away from the third board member and the fourth board member, respectively;
The corner structure of a drywall according to claim 1 or 2, wherein the third stud and the fourth stud are disposed away from the first board member and the second board member, respectively. . The base member is disposed on the corner side of the corner portion,
The third board member and the fourth board member are orthogonal to each other on the protruding corner side,
A nonflammable out-corner base member that has a first surface to which the third board member is attached and a second surface to which the fourth board member is attached, and is fixed to a column. Item 4. The dry wall corner structure according to Item 3.   The first surface and the second surface of the base member are provided with locking pieces that contact the side surfaces of the first stud and the second stud for positioning the base member. The corner part structure of the drywall according to any one of claims 1 to 4.   Each said locking piece is cut and raised from the 1st surface or the 2nd surface of the said base member, The side surface contact | abuts to the said 1st stud or the said 2nd stud. The corner structure of the drywall as described in 1. Double-sided tape is attached in advance to the first surface and the second surface of the base member,
The corner structure of the drywall according to any one of claims 1 to 6, wherein the base member is fixed to the first stud and the second stud by the double-sided tape.

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