Wall substrate member and wall panel

Abstract

To provide a wall substrate member capable of improving sound insulation performance.SOLUTION: A wall substrate member 2 is constituted of a long shaped steel that comprises a web part 20, and a first flange part 21 and a second flange part 22 that extend in a first direction 2B1 from both ends of the web part 20. The wall substrate member 2 has a face plate attached to the outer surface of at least one of the first flange part 21 and the second flange part 22. The web part 20 has: a first base face 23 one end of which is connected to the first flange part 21 and a second base face 24 one end of which is connected to the second flange part 22; and a protrusion part 25 that protrudes from the other ends of the first base face 23 and the second base face 24 towards a second direction 2B2 that is an opposite direction of the first direction 2B1.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a wall base member and a wall panel to which a facing material is joined. [Background technology]

[0002] For example, as shown in Patent Documents 1 to 3 below, shaped steel is used as a base material for walls.

[0003] Patent Document 1 discloses a "lightweight steel partition wall comprising upper and lower runners fixed to the upper and lower floors, studs with their upper and lower ends inserted into the upper and lower runners, gypsum boards fixed to the studs, and glass wool filled in the hollow space surrounded by them, the studs and the upper runners displacing relative to each other in the plane to absorb inter-story displacement of the building, wherein batten plates are interposed between both sides of the studs and the gypsum boards in a staggered arrangement, the upper runners have a width greater than that of the studs but less than the sum of the width of the studs and the thickness of the batten plates placed on both sides of the studs, and elastic buffer material attached to the studs is interposed between both sides of the upper ends of the studs and the inside surfaces of the upper runners at a position higher than the upper ends of the batten plates, forming a gap between the boards and the outside surfaces of the upper runners." The "studs" in Patent Document 1 correspond to the base material.

[0004] Patent Document 2 discloses a "sound-insulating holding member that is composed of a base that is formed perpendicular to a portion to be held, support portions that extend perpendicularly from both sides of the base, and a bulge that is formed in the center of the base in the same direction as the support portions, and that forms a sound-insulating portion by arranging a plurality of sound-insulating openings on both sides of the bulge." The "sound-insulating holding member" in Patent Document 2 corresponds to the base material.

[0005] Patent Document 3 discloses a partition wall structure in which "sound-absorbing material and vertically extending studs are alternately arranged along the length of the partition wall between a pair of wall panels that are spaced apart from each other by a set distance and form the wall surface of the partition wall, the studs having a roughly U-shaped cross section formed by integrally forming a base that is positioned perpendicular to both wall panels and extensions that extend from both ends of the base along both wall panels, and the base has a vertically continuous groove that is bent and formed." The "studs" in Patent Document 3 correspond to the base material. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-242298 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-26191 [Patent Document 3] Japanese Patent Application Publication No. 8-260597 Summary of the Invention [Problem to be solved by the invention]

[0007] When surface materials (battens and gypsum boards) are placed on both sides of the base material (studs) as in Patent Document 1, the base material transmits sound from one side to the other, which tends to reduce sound insulation.

[0008] As in Patent Documents 2 and 3, by forming recesses (the bulges in Patent Document 2 and the grooves in Patent Document 3) in the web portion of the underlayment (the base in Patent Document 2 and the base in Patent Document 3), it is possible to substantially lengthen the web portion, which serves as the sound transmission path, and thereby improve sound insulation. However, further improvement in sound insulation is desired.

[0009] The present invention has been made to solve the above-mentioned problems, and one of its objects is to provide a wall base member and a wall panel that can improve sound insulation. [Means for solving the problem]

[0010] For the purpose of explanation, the terms "C-shaped steel", "bow steel" and "convex steel" may be used below. "C-shaped steel" means a steel beam (channel steel) with a C-shaped cross section having a web portion and first and second flange portions extending in a first direction from both ends of the web portion (see the left side of Figure 17). A "bow steel" is a C-shaped steel with a recess provided in the web portion. That is, a "bow steel" refers to a shaped steel having a web portion, a first flange portion and a second flange portion extending in a first direction from both ends of the web portion, a first base surface having one end connected to the first flange portion, a second base surface having one end connected to the second flange portion, and recesses protruding in the first direction from the other ends of the first base surface and the second base surface (see the center of Figure 17). A "convex steel" is a C-shaped steel with a convex portion provided on the web portion. That is, a "convex steel" refers to a shaped steel having a web portion, a first flange portion and a second flange portion extending in a first direction from both ends of the web portion, a first base surface having one end connected to the first flange portion, a second base surface having one end connected to the second flange portion, and convex portions protruding from the other ends of the first base surface and the second base surface in a second direction opposite to the first direction (see the right side of Figure 17).

[0011] The present inventors have investigated the relationship between the shape of a wall base member and sound insulation, and have discovered that convex steel beams have better sound insulation properties than C-shaped steel beams and bow-shaped steel beams. The present invention is based on this new discovery.

[0012] In one embodiment, the wall base member of the present invention is a wall base member made of a longitudinal steel beam having a web portion and first and second flange portions extending in a first direction from both ends of the web portion, and a surface material is joined to the outer surface of at least one of the first and second flange portions, and the web portion is provided with a first base surface having one end connected to the first flange portion, a second base surface having one end connected to the second flange portion, and a convex portion protruding from the other ends of the first and second base surfaces in a second direction opposite to the first direction.

[0013] The wall panel of the present invention comprises a plurality of wall base members, each of which is made of the above-mentioned wall base member and which are arranged at intervals in the width direction perpendicular to the material axis direction, and at least one face member joined to the outer surface of at least one of the first flange portion and the second flange portion of the plurality of wall base members. [Effects of the Invention]

[0014] According to one embodiment of the wall base member and wall panel of the present invention, the web portion is provided with a first base surface having one end connected to the first flange portion, a second base surface having one end connected to the second flange portion, and a convex portion protruding from the other ends of the first base surface and the second base surface in a second direction opposite to the first direction, thereby improving sound insulation compared to C-shaped steel and bow-shaped steel. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a cross-sectional view of a wall panel according to an embodiment of the present invention; [Figure 2] FIG. 2 is a front view showing the wall base member of FIG. 1. [Figure 3] 3 is a right side view showing the wall base member of FIG. 2. FIG. [Figure 4] FIG. 10 is an explanatory diagram showing an example of measurement of sound insulation performance in the examples. [Figure 5] FIG. 2 is a front view showing a C-shaped steel (without holes) used in measuring sound insulation performance in the examples. [Figure 6] FIG. 2 is a front view showing the bow steel (without holes) used in the measurement of sound insulation performance in the examples. [Figure 7] FIG. 2 is a front view showing a convex steel (without holes) used in measuring sound insulation performance in the examples. [Figure 8] 8 is a graph showing the relationship between the center frequency (Hz) and the sound transmission loss (dB) when each of the structural steels in FIGS. 5 to 7 is used as the wall base member 2. FIG. [Figure 9] FIG. 1 is an external view showing a C-shaped steel (with a hole, height 100 mm) used in measuring sound insulation performance in the examples. [Figure 10]FIG. 1 is an external view showing a C-shaped steel (with a hole, height 200 mm) used in measuring sound insulation performance in the examples. [Figure 11] 11 is a graph showing the relationship between the center frequency (Hz) and the sound transmission loss (dB) when each of the structural steels of FIGS. 9 and 10 is used as a wall base member 2. FIG. [Figure 12] FIG. 2 is an external view showing a convex steel (with holes) used in measuring sound insulation performance in the examples. [Figure 13] 13 is a graph showing the relationship between the center frequency (Hz) and the sound transmission loss (dB) when each of the structural steels of FIGS. 5, 7 and 12 is used as the wall base member 2. FIG. [Figure 14] 6 is a graph showing the relationship between the center frequency (Hz) and the sound transmission loss (dB) when the plate thickness of the C-shaped steel (without holes) of FIG. 5 is changed. [Figure 15] 6 is a graph showing the relationship between plate thickness and overall heat transmission coefficient when the plate thickness is changed in the C-shaped steel (without holes) of FIG. 5. [Figure 16] 1 is a graph showing the relationship between flange length and bending rigidity of a C-shaped steel. [Figure 17] FIG. 2 is a front view showing a C-shaped steel, a bow-shaped steel, and a convex steel. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to each embodiment, and the components can be modified and embodied without departing from the spirit of the present invention. Furthermore, various inventions can be formed by appropriately combining multiple components disclosed in each embodiment. For example, some components may be omitted from all the components shown in the embodiments. Furthermore, components of different embodiments may be appropriately combined.

[0017] Fig. 1 is a cross-sectional view of a wall panel 1 according to an embodiment of the present invention, Fig. 2 is a front view showing the wall base member 2 of Fig. 1, and Fig. 3 is a right side view showing the wall base member 2 of Fig. 2. The wall panel 1 shown in Fig. 1 is for forming a wall of a building such as a house. The wall panel 1 may form the exterior wall of the building or may form the interior wall of the building.

[0018] As shown in FIG. 1 , the wall panel 1 includes multiple wall base members 2 spaced apart from one another in a width direction 2B perpendicular to the material axis direction 2A, and at least one facing member 3 joined to the outer surface of at least one of the first flange portions 21 and the second flange portions 22 of each of the multiple wall base members 2. FIG. 1 illustrates a configuration in which the facing member 3 is joined to the outer surfaces of both the first flange portion 21 and the second flange portion 22. However, the facing member 3 may be joined to the outer surface of only one of the first flange portion 21 and the second flange portion 22. The facing member 3 may be made of structural plywood or gypsum board. Other members, such as moisture-proof airtight sheets and ceramic or metal wall materials, may be attached to the outer surface of the facing member 3. A filler member 4, such as glass wool, may be disposed in the spaces between the facing members 3 or around the wall base members 2.

[0019] As particularly shown in Figure 2, the wall base member 2 according to an embodiment of the present invention consists of a longitudinal steel beam having a web portion 20 and a first flange portion 21 and a second flange portion 22 extending in a first direction 2B1 from both ends of the web portion 20, and as described above, a surface material 3 is joined to the outer surface of at least one of the first flange portion 21 and the second flange portion 22.

[0020] The structural steel may be formed by bending a predetermined steel material (steel plate), and the web portion 20, first flange portion 21, and second flange portion 22 may be formed integrally with one another. The height direction 2C may be understood as the direction in which the first flange portion 21 and the second flange portion 22 are spaced apart (or the direction in which the web portion 20 extends), and the first direction 2B1 may be understood as a direction (leftward in FIG. 2 ) included in the material axis direction 2A and the width direction 2B perpendicular to the height direction 2C. The material axis direction 2A is the direction in which the structural steel constituting the wall base member 2 extends.

[0021] The web portion 20 is provided with a first base surface 23 having one end connected to the first flange portion 21, a second base surface 24 having one end connected to the second flange portion 22, and protrusions 25 protruding from the other ends of the first base surface 23 and the second base surface 24 in a second direction 2B2 opposite to the first direction 2B1. The first base surface 23 and the second base surface 24 may extend in the height direction 2C. The second direction 2B2 may be understood to be a direction included in the width direction 2B (to the right in FIG. 2).

[0022] The wall base member 2 of this embodiment may be understood as a convex steel having a convex portion 25 provided on the web portion 20 of a C-shaped steel. As will be described in detail later, the inventors have carefully examined the relationship between the shape of the wall base member 2 and sound insulation, and have found that the sound insulation of a convex steel is superior to that of a C-shaped steel (see the left side of FIG. 17) and a bow steel (see the center of FIG. 17). In other words, by using the wall base member 2 of this embodiment, sound insulation can be improved compared to that of a C-shaped steel and a bow steel.

[0023] 2, the protrusion 25 may be provided with a first projecting surface 251 extending in the second direction 2B2 from the other end of the first base surface 23, a second projecting surface 252 extending in the second direction 2B2 from the other end of the second base surface 24, and a third projecting surface 253 connecting the tips of the first projecting surface 251 and the second projecting surface 252. The first projecting surface 251 and the second projecting surface 252 may extend parallel to each other, and the third projecting surface 253 may extend in the height direction 2C perpendicular to the first projecting surface 251 and the second projecting surface 252.

[0024] 3, the third projecting surface 253 may have a plurality of slots 26 arranged in a staggered pattern, extending in the material axis direction 2A. The plurality of slots 26 may extend longer in the material axis direction 2A than in the height direction 2C. By providing the plurality of slots 26 in a staggered pattern on the third projecting surface 253, the heat transfer path between the first flange portion 21 and the second flange portion 22 through the web portion 20 is lengthened, thereby improving the overall heat transfer resistance.

[0025] The wall base member 2 of this embodiment will be described in more detail below.

[0026] The yield point of the steel section is 400N / mm 2 Over 780N / mm 2 It may be made of the following steel materials: Yield point 400N / mm 2 By using the above steel material (high tensile steel), the yield point is 400N / mm 2 Compared to using steel material (ordinary steel) with a yield point of less than 780 N / mm, the strength can be ensured even when the wall is thinned. By thinning the wall, sound insulation and heat insulation can be improved. On the other hand, as the strength of the steel increases, the ease of driving fastening members (screws, bolts or nails) when joining the face plate 3 to the outer surfaces of the first flange portion 21 and the second flange portion 22 tends to decrease. 2 By using the following steel materials, it is possible to prevent a decrease in the casting ease of the fastening member.

[0027] The thickness of the steel material constituting the structural steel may be 1.2 mm. The steel material may be a plated material. The plating may be a ternary alloy plating containing zinc-aluminum-magnesium. Specific examples of such ternary alloy plating include ZAM (registered trademark), SD (registered trademark), and ZEXEED (registered trademark). The plating may also be other plating such as zinc-aluminum alloy plating (GL). The coating weight of the plating is 80 g / m 2 The upper limit of the coating weight of the plating is not particularly limited, but from the viewpoint of manufacturing, it is, for example, 350 g / m 2 etc.

[0028] The wall base member 2 may further include a first lip portion 21a extending from the tip of the first flange portion 21 and a second lip portion 22a extending from the tip of the second flange portion 22. The first lip portion 21a and the second lip portion 22a may be perpendicular to the first flange portion 21 and the second flange portion 22, and may extend parallel to the web portion 20 (particularly, the first base surface 23, the second base surface 24, and the third protruding surface 253). The extension widths of the first lip portion 21a and the second lip portion 22a in the height direction 2C of the wall base member 2 may be shorter than the extension width of the web portion 20 in the height direction 2C. The tips of the first lip portion 21a and the second lip portion 22a may be spaced apart from each other. When the height H0 of the wall base member 2 or the structural steel (the distance between the outer surfaces of the first flange portion 21 and the second flange portion 22 in the height direction 2C) is 100 mm, the extension widths of the first lip portion 21a and the second lip portion 22a in the height direction 2C may each be 10 mm, and the distance between the tips of the first lip portion 21a and the second lip portion 22a in the height direction 2C may be 80 mm.

[0029] The extension widths of the first base surface 23 and the second base surface 24 in the height direction 2C may be 10% to 30% of the height H0 of the shaped steel. When the height H0 of the shaped steel is 100 mm, the extension widths of the first base surface 23 and the second base surface 24 in the height direction 2C may each be 10 mm.

[0030] The extension width of the third projected surface 253 in the height direction 2C may be 40% or more and 80% or less of the height H0 of the shaped steel. When the height H0 of the shaped steel is 100 mm, the extension width of the third projected surface 253 in the height direction 2C may be 80 mm.

[0031] When the height H0 of the structural steel is 100 mm, the width of the structural steel (the distance between the outer surface of the third protrusion surface 253 in the width direction 1C and the outer surfaces of the first lip portion 21a and the second lip portion 22a) may be 80 mm.

[0032] The protruding width PW of the convex portion 25 in the second direction 2B2 from the other end of the first base surface 23 and the second base surface 24 may be 10 mm or more and less than the width FW of the first flange portion 21 and the second flange portion 22. By having the protruding width PW be 10 mm or more, sound insulation can be more reliably improved compared to C-shaped steel and bow-shaped steel. On the other hand, by having the protruding width PW be less than the width FW of the first flange portion 21 and the second flange portion 22, structural integrity can be maintained. The above-mentioned protruding width PW may be understood as the distance in the width direction 2B from the other end of the first base surface 23 and the second base surface 24 to the outer surface of the third protruding surface 253. When the width of the structural steel is 80 mm, the width of the first flange portion 21 and the second flange portion 22 may be 50 mm, and the protruding width PW may be 30 mm.

[0033] The ratio W1:W2 of the width W1 of the slot 26 in the material axis direction 2A to the width W2 between the slots 26 in the material axis direction 2A is preferably 10:1. The larger the width W1 of the slot 26 relative to the width W2 between the slots 26, the more improved the heat transfer performance. On the other hand, if the width W1 of the slot 26 is too large relative to the width W2 between the slots 26, there is a concern that the bending strength may decrease. A ratio W1:W2 of 10:1 makes it possible to achieve a balance between the heat transfer performance and the bending strength. The width W1 of the slot 26 may be 60 mm, and the width W2 between the slots 26 may be 6 mm. This makes it possible to more reliably achieve a balance between the heat transfer performance and the bending strength.

[0034] The multiple oblong holes 26 may be arranged to form multiple rows R1 to R3 spaced apart from one another in the height direction 2C perpendicular to the material axis direction 2A. In the illustrated embodiment, the multiple oblong holes 26 form three rows R1 to R3. When the row R1 of the multiple oblong holes 26 closest to the first flange portion 21 is designated as the first row R1, the ratio H0:D0 of the height H0 of the shaped steel to the distance D0 from the upper surface of the first projected surface 251 to the upper end of the first row R1 is preferably 100:23. The greater the distance D0 from the upper surface of the first projected surface 251 to the upper end of the first row R1 relative to the height H0 of the shaped steel, the more effectively the bending strength can be suppressed. On the other hand, if the distance D0 from the upper surface of the first projected surface 251 to the upper end of the first row R1 is too large relative to the height H0 of the shaped steel, the shorter the distance between the rows of the oblong holes 26, which may result in reduced thermal insulation and bending strength. A ratio H0:D0 of 100:23 makes it possible to achieve a balance between preventing a decrease in bending strength and maintaining thermal insulation properties. The height H0 of the structural steel may be 100 mm, and the distance D0 from the upper surface of the first projection surface 251 to the upper end of the first row R1 may be 23 mm. This makes it possible to more reliably achieve a balance between bending strength and thermal insulation properties.

[0035] The oblong holes 26 in rows R1 to R3 adjacent to each other in the height direction 2C are arranged offset from each other in the material axis direction 2A. The amount of offset in the arrangement of the oblong holes 26 in the material axis direction 2A may be half the extension width of the oblong holes 26 in the material axis direction 2A. The extension width of each oblong hole 26 in the height direction 2C of the wall base member 2 may be 4 mm, and the distance between the oblong holes 26 in the height direction 2C may be 11 mm.

[0036] Although the preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that a person skilled in the art to which the present invention pertains can conceive of various modifications and alterations within the scope of the technical ideas set forth in the claims, and it is understood that these also naturally fall within the technical scope of the present invention. [Example]

[0037] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0038] FIG. 4 is an explanatory diagram showing an example of sound insulation performance measurement in an example. The inventors prepared various steel sections as wall base members 2 and measured their sound insulation performance in accordance with JIS A 1416 (Method for measuring airborne sound insulation performance of building components in a laboratory). That is, as shown in FIG. 4, glass wool was placed around the steel sections, and moisture-proof airtight sheets and reinforced gypsum boards were joined to both sides of the steel sections to form wall panels, and the wall panels were fixed to a base with runner materials. One side of the wall panel faced the sound source room and the other side faced the sound receiving room, and test sounds from the sound source room were detected in the sound receiving room, and sound transmission loss (dB) was measured for each center frequency (Hz). The dimensions and layout of each component are as shown in FIG. 4.

[0039] FIG. 5 is a front view of a C-shaped steel (without holes) used in the measurement of sound insulation performance in the examples, FIG. 6 is a front view of a bow-shaped steel (without holes) used in the measurement of sound insulation performance in the examples, FIG. 7 is a front view of a convex steel (without holes) used in the measurement of sound insulation performance in the examples, and FIG. 8 is a graph showing the relationship between the center frequency (Hz) and the sound transmission loss (dB) when each of the steel shapes in FIGS. 5 to 7 is used as a wall base material 2.

[0040] The inventors measured the sound insulation performance when using the C-shaped steel (without holes) of FIG. 5, the bow-shaped steel (without holes) of FIG. 6, and the convex steel (without holes) of FIG. 7 as the wall base material 2. The thickness of each steel was 1.2 mm, and the dimensions of each part were as shown in FIGS. 5 to 7. The measurement results of the sound insulation performance are shown in FIG. 8. As shown in FIG. 8, at center frequencies of 100 to 2000 Hz, the convex steel showed an improvement in sound transmission loss of 2 to 4 dB at each frequency compared to the C-shaped steel. On the other hand, the bow-shaped steel showed an improvement in sound transmission loss at 630 Hz compared to the C-shaped steel, but no difference was observed between the C-shaped steel and the bow-shaped steel at most center frequencies. These results confirmed that using the convex steel as the wall base material 2 can improve sound insulation compared to the C-shaped steel and the bow-shaped steel.

[0041] Next, FIG. 9 is an external view showing a C-shaped steel (with a hole, height 100 mm) used in measuring sound insulation performance in the examples, FIG. 10 is an external view showing a C-shaped steel (with a hole, height 200 mm) used in measuring sound insulation performance in the examples, and FIG. 11 is a graph showing the relationship between the center frequency (Hz) and the sound transmission loss (dB) when each of the steel shapes shown in FIGS. 9 and 10 is used as a wall base material 2.

[0042] It seemed that the material constituting the web of a convex steel beam extends longer than that of a C-shaped steel beam, making the sound transmission path longer. For this reason, the inventors tested C-shaped steel beams with different web heights, as shown in Figures 9 and 10, to investigate the relationship between the length of the sound transmission path and sound insulation performance. As shown in Figure 11, no significant difference was observed in sound transmission loss between a 100 mm high C-shaped steel beam and a 200 mm high C-shaped steel beam. From these results, it is thought that the good sound insulation performance of the convex steel beam is due to the shape of the convex steel beam, not to the extension of the sound transmission path.

[0043] Next, FIG. 12 is an external view showing the convex steel (with holes) used in the sound insulation performance measurement in the examples, and FIG. 13 is a graph showing the relationship between the center frequency (Hz) and the sound transmission loss (dB) when each of the steel sections shown in FIGS. 5, 7, and 12 is used as the wall base material 2.

[0044] It seemed that sound insulation performance deteriorated when slots were made in the web. For this reason, convex steel beams with and without slots, as shown in Figures 7 and 12, were tested to investigate the relationship between the presence or absence of slots and sound insulation performance. As shown in Figure 13, there was not much difference in sound insulation performance between the convex steel beam in Figure 7 (without holes) and the convex steel beam in Figure 12 (with holes). Both convex steel beams exhibited better sound insulation performance than the C-shaped steel beam in Figure 5 (with holes).

[0045] On the other hand, the thermal transmittance (W / m) of the wall panel using the convex steel (without holes) in Figure 7 and the wall panel using the convex steel (with holes) in Figure 12 2When the thermal insulation coefficient (K) was calculated, the wall panel using the convex steel (with holes) in Figure 12 showed a lower thermal transmittance and was found to have better thermal insulation performance. From these results, it was confirmed that by providing multiple long holes in a staggered pattern on the third projecting surface of the convex part of the convex steel, it is possible to improve thermal insulation performance while maintaining sound insulation performance.

[0046] Next, Fig. 14 is a graph showing the relationship between the center frequency (Hz) and sound transmission loss (dB) when the plate thickness is changed in the C-shaped steel (without holes) of Fig. 5, and Fig. 15 is a graph showing the relationship between the plate thickness and the overall heat transmission coefficient when the plate thickness is changed in the C-shaped steel (without holes) of Fig. 5. The inventors investigated the effect of the plate thickness of the shaped steel on the sound insulation performance and the heat insulation performance.

[0047] The C-shaped steel in Figure 5 has a plate thickness of 1.2 mm, but we prepared a C-shaped steel with the same shape as the C-shaped steel in Figure 5, except that the plate thickness was 2.3 mm, and investigated its sound insulation performance. As shown in Figure 14, an improvement in sound transmission loss (dB) was observed when the plate thickness was thinner.

[0048] In addition, the thermal conductivity (W / m 2 When the thermal insulation coefficient (K) was calculated, it was found that the wall panel using thinner C-shaped steel showed a lower thermal conductivity and was superior in thermal insulation performance.

[0049] From these results, the yield point is 400N / mm 2 It was confirmed that sound insulation and heat insulation could be improved by using the above steel materials (high-tensile steel) to reduce the thickness.

[0050] Next, FIG. 16 is a graph showing the relationship between flange length and bending rigidity of a C-shaped steel. It is generally known that the longer the flange length of a C-shaped steel, the better its bending rigidity. The inventors measured the bending rigidity of a convex steel and a bow steel and that of a C-shaped steel to investigate the bending rigidity of the convex steel and the bow steel equivalent to the flange length of a C-shaped steel. The cross-sectional shape of FIG. 7 was used for the convex steel. The cross-sectional shape of FIG. 6 was used for the bow steel. The cross-sectional shape of FIG. 5 was used for the C-shaped steel. The bending rigidity was calculated as the product IE of the second moment of area I and Young's modulus E. The bending rigidity of the C-shaped steel was calculated for flange lengths of 75 mm and 80 mm in addition to the 50 mm flange length of FIG. 5, and extrapolated to obtain the straight line shown in FIG. 16.

[0051] If we consider the convex or bow-shaped protrusions from the web base of the convex steel and bow steel as an extension of the flange length, as shown in Figure 16, the bow steel has bending rigidity equivalent to that of a C-shaped steel with a flange length of 55 mm, and the convex steel has bending rigidity equivalent to that of a C-shaped steel with a flange length of 68 mm. These results show that using convex steel as a wall base material not only provides excellent sound insulation performance, but also excellent structural performance due to bending.

[0052] The invention described in this specification can also be described as follows. [1] A wall base member made of a longitudinal steel beam having a web portion and first and second flange portions extending in a first direction from both ends of the web portion, and a surface material is joined to an outer surface of at least one of the first and second flange portions, The web portion is provided with a first base surface having one end connected to the first flange portion, a second base surface having one end connected to the second flange portion, and a convex portion protruding from the other ends of the first base surface and the second base surface in a second direction opposite to the first direction. Wall base material. [2] the protrusion is provided with a first projecting surface extending in the second direction from the other end of the first base surface, a second projecting surface extending in the second direction from the other end of the second base surface, and a third projecting surface connecting tips of the first projecting surface and the second projecting surface, The third protruding surface has a plurality of elongated holes extending in the material axis direction and arranged in a staggered pattern. The wall base member according to claim 1. [3] a ratio W1:W2 of a width W1 of the slot in the material axis direction to a width W2 between the slots in the material axis direction is 10:1; the plurality of long holes are arranged in a plurality of rows spaced apart from one another in a height direction perpendicular to the material axis direction, and when the row of the plurality of long holes that is closest to the first flange portion is defined as a first row, a ratio H0:D0 of a height H0 of the structural steel to a distance D0 from an upper surface of the first protrusion surface to an upper end of the first row is 100:23; 3. The wall base member according to claim 2. [4] The ratio W1:W2 of the width W1 of the slot in the material axis direction to the width W2 between the slots in the material axis direction is 10:1. 3. The wall base member according to claim 2. [5] The width W1 of the slot is 60 mm, and the width W2 between the slots is 6 mm. 5. A wall base member according to claim 4. [6] the plurality of long holes are arranged in a plurality of rows spaced apart from one another in a height direction perpendicular to the material axis direction, and when the row of the plurality of long holes that is closest to the first flange portion is defined as a first row, a ratio H0:D0 of a height H0 of the structural steel to a distance D0 from an upper surface of the first protrusion surface to an upper end of the first row is 100:23; 3. The wall base member according to claim 2. [7] The height H0 of the steel section is 100 mm, and the distance D0 from the upper surface of the first protrusion surface to the upper end of the first row is 23 mm. 7. The wall base member according to claim 6. [8] Yield point is 400N / mm 2 Over 780N / mm 2 The structural steel is made of the following steel materials: A wall base member according to any one of claims 1 to 7. [9] a protruding width of the convex portion in the second direction from the other end of the first base surface and the second base surface is 10 mm or more and is equal to or less than a width of the first flange portion and the second flange portion; A wall base member according to any one of claims 1 to 8.

[10] A plurality of wall base members, each of which is the wall base member according to any one of claims 1 to 9, arranged at intervals in a width direction perpendicular to the material axis direction; at least one face material joined to an outer surface of at least one of the first flange portion and the second flange portion of the plurality of wall base members; A wall panel comprising: [Explanation of symbols]

[0053] 1: Wall panel 1C: Width direction 2: Wall base material 2A: Material axis direction 2B:Width direction 2B1: 1st direction 2B2 :Second direction 2C: Height direction 3: Surface material 20: Web Department 21: First flange 22: Second flange 23: 1st base surface 24: 2nd base 25: Convex part 26: Long hole 251: 1st protrusion 252:Second protrusion 253:Third protrusion

Claims

1. A wall base member comprising a longitudinal steel section having a web portion and first and second flange portions extending in a first direction from both ends of the web portion, wherein a face material is joined to an outer surface of at least one of the first and second flange portions, The web portion is provided with a first base surface having one end connected to the first flange portion, a second base surface having one end connected to the second flange portion, and a convex portion protruding from the other ends of the first base surface and the second base surface in a second direction opposite to the first direction. Wall base material.

2. the protrusion is provided with a first projecting surface extending in the second direction from the other end of the first base surface, a second projecting surface extending in the second direction from the other end of the second base surface, and a third projecting surface connecting tips of the first projecting surface and the second projecting surface, The third protruding surface has a plurality of elongated holes extending in the material axis direction and arranged in a staggered pattern. The wall base member according to claim 1 .

3. a ratio W1:W2 of a width W1 of the elongated hole in the material axis direction to a width W2 between the elongated holes in the material axis direction is 10:1; the plurality of long holes are arranged in a plurality of rows spaced apart from one another in a height direction perpendicular to the material axis direction, and when a row of the plurality of long holes that is closest to the first flange portion is defined as a first row, a ratio H0:D0 of a height H0 of the structural steel to a distance D0 from an upper surface of the first protrusion surface to an upper end of the first row is 100:23; The wall base member according to claim 2.

4. a ratio W1:W2 of a width W1 of the elongated hole in the material axis direction to a width W2 between the elongated holes in the material axis direction is 10:1; The wall base member according to claim 2.

5. The width W1 of the slot is 60 mm, and the width W2 between the slots is 6 mm. The wall base member according to claim 4.

6. the plurality of long holes are arranged in a plurality of rows spaced apart from one another in a height direction perpendicular to the material axis direction, and when a row of the plurality of long holes that is closest to the first flange portion is defined as a first row, a ratio H0:D0 of a height H0 of the structural steel to a distance D0 from an upper surface of the first protrusion surface to an upper end of the first row is 100:23; The wall base member according to claim 2.

7. The height H0 of the steel section is 100 mm, and the distance D0 from the upper surface of the first protrusion surface to the upper end of the first row is 23 mm. The wall base member according to claim 6.

8. Yield point is 400N / mm 2 or more and 780N / mm 2 The structural steel is made of the following steel materials: The wall base member according to claim 1 .

9. a protruding width of the convex portion in the second direction from the other end of the first base surface and the second base surface is 10 mm or more and is equal to or less than a width of the first flange portion and the second flange portion; The wall base member according to claim 1 .

10. A plurality of wall base members, each of which is the wall base member according to any one of claims 1 to 9, arranged at intervals in a width direction perpendicular to the material axis direction; at least one face material joined to an outer surface of at least one of the first flange portion and the second flange portion of the plurality of wall base members; A wall panel comprising:

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