Wall substrate components and exterior wall structures

Abstract

The present invention provides a wall base material that allows for the joining of exterior wall components by operation from the inside, while ensuring load-bearing capacity and thermal insulation performance. [Solution] The wall base member 1 is made of a longitudinal lip channel steel having a web portion 10, a first flange portion 11 and a second flange portion 12 extending from both ends of the web portion 10, and a first lip portion 13 and a second lip portion 14 extending from the tips of the first flange portion 11 and the second flange portion 12 in a direction toward each other, and the wall base member 1 is joined to the outer surface of the web portion 10, wherein the first flange portion 11 and the second flange portion 12 are provided with a plurality of elongated holes 15 extending in the material axis direction 1A in a staggered pattern, and the ratio W1:W2 of the width W1 of the elongated holes 15 in the material axis direction 1A to the width W2 between the elongated holes 15 in the material axis direction 1A is 10:1.

Description

[Technical Field]

[0001] The present invention relates to a wall base member and an exterior wall structure to which exterior wall members are joined. [Background technology]

[0002] Patent Document 1 below describes a lip channel steel having a web, a pair of flanges, and a pair of lips, with holes provided in the web to improve the thermal insulation performance of the channel steel, and a plate thickness of 2.3 mm or less, and a face material joined to the plate surface of at least one of the flanges, wherein the length of the lip continuous with the flange to which the face material is joined is the F value of the lip channel steel [N / mm 2 A panel material is disclosed in which the effective lip length [mm] is defined by the formula (240 / √F) × t, where F is the value of the flange and t is the thickness [mm] of the lip channel steel. This configuration involves joining the face material to the plate surface of the flange, and can be described as using the lip channel steel in a so-called strong-axis manner. Furthermore, Patent Document 1 lists exterior wall material as a type of face material. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-103859 [Overview of the project] [Problems that the invention aims to solve]

[0004] When using a lip channel steel in a strong-axis configuration as in Patent Document 1, the other flange gets in the way when attempting to join the exterior wall material to the plate surface of one flange, making it difficult to join the exterior wall material by operating from the inside of the lip channel steel. If the lip channel steel is used in a so-called weak-axis configuration (i.e., the lip channel steel of Patent Document 1 is rotated 90° and the exterior wall material is joined to the plate surface of the web), it becomes possible to enter the interior of the lip channel steel through the gap in the lip, and to join the exterior wall material by operating from the inside of the lip channel steel. However, in the lip channel steel of Patent Document 1, holes are provided in the web to improve the thermal insulation performance of the channel steel, so using it in a weak-axis configuration raises concerns about the load-bearing capacity of the lip channel steel. Furthermore, using it in a weak-axis configuration causes the function of the holes that improve thermal insulation performance to be lost.

[0005] The present invention was made to solve the above-mentioned problems, and one of its objectives is to provide a wall base member and an exterior wall structure that can ensure load-bearing capacity and heat insulation performance while enabling the joining of exterior wall members by operation from the inside. [Means for solving the problem]

[0006] In one embodiment, the wall base member according to the present invention is made of a longitudinal lip channel steel having a web portion, a first flange portion and a second flange portion extending from both ends of the web portion, and a first lip portion and a second lip portion extending in a direction toward each other from the tips of the first flange portion and the second flange portion, and is a wall base member to which an outer wall member is joined to the outer surface of the web portion, wherein the first flange portion and the second flange portion are provided with a plurality of elongated holes extending in the material axis direction in a staggered pattern, and the ratio W1:W2 of the width W1 of the elongated holes in the material axis direction to the width W2 between the elongated holes in the material axis direction is 10:1.

[0007] In one embodiment, the exterior wall structure according to the present invention comprises the above-mentioned wall base member and an exterior wall member joined to the outer surface of the web portion. [Effects of the Invention]

[0008] According to one embodiment of the wall base member and exterior wall structure of the present invention, the first flange portion and the second flange portion are provided with a plurality of elongated holes extending in the material axis direction in a staggered pattern, and the ratio W1:W2 of the width W1 of the elongated holes in the material axis direction to the width W2 between the elongated holes in the material axis direction is 10:1, so that the exterior wall members can be joined by operation from the inside, while ensuring load-bearing capacity and heat insulation performance. [Brief explanation of the drawing]

[0009] [Figure 1] This is a cross-sectional view of a wall base member according to an embodiment of the present invention. [Figure 2] This is a right side view showing the wall base material in Figure 1. [Figure 3] This is a cross-sectional view showing an exterior wall structure equipped with wall base members as shown in Figure 1. [Figure 4] Figure 3 is a bottom view showing the exterior wall structure. [Figure 5] This is an explanatory diagram showing the state of the umbrella-shaped part of Figure 3 before it is deformed. [Figure 6] This is an explanatory diagram showing the exterior wall structure modeled in the embodiment. [Figure 7] Figure 6 is an explanatory diagram showing the wooden battens for the interior wall. [Figure 8] Figure 6 is an explanatory diagram showing the lip channel steel and wooden pieces. [Figure 9] Figure 6 is a side view showing a lip channel steel. [Modes for carrying out the invention]

[0010] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to each embodiment, and can be materialized by modifying the components without departing from the spirit of the invention. Furthermore, various inventions can be formed by appropriately combining the multiple components disclosed in each embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, components from different embodiments may be appropriately combined.

[0011] FIG. 1 is a cross-sectional view of the wall base member 1 according to an embodiment of the present invention, and FIG. 2 is a right side view showing the wall base member 1 of FIG. 1. As shown in FIG. 1, the wall base member 1 according to an embodiment of the present invention includes a web portion 10, a first flange portion 11 and a second flange portion 12 extending from both ends of the web portion 10, and a first lip portion 13 and a second lip portion 14 extending in a direction approaching each other from the tips of the first flange portion 11 and the second flange portion 12. It is composed of a longitudinal lip channel steel. The lip channel steel may be formed by bending a predetermined steel material (steel plate), and the web portion 10, the first flange portion 11, the second flange portion 12, the first lip portion 13 and the second lip portion 14 may be integrally formed of the same steel material.

[0012] The web portion 10, the first lip portion 13 and the second lip portion 14 may extend in the material axis direction 1A and the width direction 1B of the wall base member 1. The first flange portion 11 and the second flange portion 12 may extend in the material axis direction 1A and the height direction 1C of the wall base member 1. The first flange portion 11 and the second flange portion 12 may extend parallel to each other and apart from each other in the width direction 1B. The material axis direction 1A, the width direction 1B and the height direction 1C may be directions orthogonal to each other.

[0013] The wall base member 1 can be used as a base for the outer wall member 20 in the outer wall structure 2 (see FIG. 3 etc.) described later. The wall base member 1 is intended to be used such that the outer wall member 20 is joined to the outer surface (upper surface) of the web portion 10. That is, the wall base member 1 is intended to be used in a so-called weak axis manner. Note that using the weak axis means arranging the member in a direction in which bending occurs around the axis with the smallest cross-sectional performance (here, the second moment of area). There is a term called using the strong axis as a term contrasted with using the weak axis. Using the strong axis means arranging the member in a direction in which bending occurs around the axis with the largest cross-sectional performance. When the outer wall member 20 is joined to at least one of the first flange portion 11 and the second flange portion 12 instead of the web portion 10, it can be understood that the wall base member 1 is used in the strong axis manner.

[0014] As is particularly evident in Figure 2, the first flange portion 11 has multiple elongated holes 15 arranged in a staggered pattern, extending in the material axis direction 1A. The second flange portion 12 also has similarly arranged elongated holes 15. The multiple elongated holes 15 may extend longer in the material axis direction 1A than in the height direction 1C. By providing multiple elongated holes 15 in a staggered pattern in the first flange portion 11 and the second flange portion 12, load-bearing capacity and heat insulation performance can be ensured. That is, when the wall base member 1 is used in a weak axis configuration as in this embodiment, the first flange portion 11 and the second flange portion 12 become pathways for heat transfer between the inside and outside of the exterior wall structure 2. Because the multiple elongated holes 15 are provided in a staggered pattern in the first flange portion 11 and the second flange portion 12, the heat transfer path between the web portion 10 and the first lip portion 13 and the second lip portion 14 through the first flange portion 11 and the second flange portion 12 is lengthened, and the heat transfer resistance can be improved. In other words, the lip channel steel constituting the wall base member 1 of this embodiment has lower heat transfer properties compared to lip channel steel without the elongated holes 15. The lip channel steel constituting the wall base member 1 is sometimes called "low heat transfer lip channel steel." Furthermore, if the elongated holes 15 are provided in the web portion 10 when the wall base member 1 is used in a weak-axis configuration, concerns arise regarding the load-bearing capacity of the wall base member 1. By providing multiple elongated holes 15 in a staggered pattern in the first flange portion 11 and the second flange portion 12, the risk of reduced load-bearing capacity of the wall base member 1 due to the elongated holes 15 can be reduced. In other words, in this embodiment, the web portion 10 does not have elongated holes 15.

[0015] In the wall substrate member 1 of this embodiment, the ratio W1:W2 of the width W1 of the elongated holes 15 along the material axis direction 1A to the width W2 between the elongated holes 15 along the material axis direction 1A is 10:1. The larger the width W1 of the elongated holes 15 is relative to the width W2 between the elongated holes 15, the better the heat transfer performance can be. On the other hand, if the width W1 of the elongated holes 15 is too large relative to the width W2 between the elongated holes 15, there is a concern that the in-plane shear strength will decrease. By having a ratio W1:W2 of 10:1, a balance can be achieved between heat transfer performance and in-plane shear strength. The width W1 of the elongated holes 15 may be 60 mm, and the width W2 between the elongated holes 15 may be 6 mm. A balance between heat transfer performance and in-plane shear strength can be achieved more reliably.

[0016] Hereinafter, the base member 1 for a wall according to the present embodiment will be described in more detail.

[0017] The thickness of the steel material constituting the lip groove-shaped steel may be 0.8 mm or more and 2.3 mm or less. The steel type constituting the steel material may be high-tensile steel. Examples of high-tensile steel include 490 N class or higher. 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). Further, the plating may be other plating such as zinc-aluminum alloy plating (GL) or the like. The adhesion amount of the plating may be 80 g / m 2 or more. The upper limit value of the adhesion amount of the plating is not particularly limited, but for example, from a manufacturing perspective, 350 g / m[[ID=�]] 2 etc. may be mentioned.

[0018] The first lip portion 13 and the second lip portion 14 may extend parallel to the web portion 10. The extension width of each of the first lip portion 13 and the second lip portion 14 in the width direction 1B of the base member 1 for a wall may be shorter than the extension width of the web portion 10 in the width direction 1B. The tips of the first lip portion 13 and the second lip portion 14 may be separated from each other.

[0019] When the width of the base member 1 for a wall (the distance between the outer surfaces of the first flange portion 11 and the second flange portion 12 in the width direction 1B) is 90 mm, the extension width of each of the first lip portion 13 and the second lip portion 14 in the width direction 1B may be 20 mm, and the distance between the tips of the first lip portion 13 and the second lip portion 14 in the width direction 1B may be 50 mm. At this time, the height of the base member 1 for a wall (the distance between the upper surface of the web portion 10 in the height direction 1C and the lower surfaces (outer surfaces) of the first lip portion 13 and the second lip portion 14) may be 50 mm.

[0020] The multiple elongated holes 15 may be arranged in multiple rows R1 to R3 spaced apart from each other in the height direction 1C. In the illustrated embodiment, the multiple elongated holes 15 form three rows R1 to R3. Of the rows R1 to R3 of the multiple elongated holes 15, the row R1 closest to the web portion 10 is designated as the first row R1. In this case, if the distance from the top surface of the web portion 10 to the top end of the first row R1 is D0 (mm), then the required lip length C is as specified in the "Guidelines for the Design of Lightweight Steel Structures (2nd Edition)" (National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism; Building Research Institute; Japan Iron and Steel Federation; Gihodo Publishing). min (mm) can be the minimum value of D0. Required lip length C min It is calculated based on the following formula.

[0021]

number

[0022] Here, b (mm) is the width of the plate element (flat plate portion excluding corners) of the web portion 10 in the width direction 1B, t (mm) is the design plate thickness of the lip channel steel (wall base member 1), and F is the standard material strength (N / mm) determined by the Minister of Land, Infrastructure, Transport and Tourism according to the type and quality of the steel material. 2 (See Article 90 of the Building Standards Act Enforcement Order, etc.) This F value is the smaller of the yield point and 70% of the tensile strength.

[0023] The design plate thickness t of the lip channel steel shall be 0.9 times the nominal plate thickness ts of the lip channel steel if it is less than 2.3 mm. If the nominal plate thickness ts is 1.2 mm, the design plate thickness t = 1.08 mm. The width b of the plate element of the web portion 10 can be determined based on the following formula. b = bs - R × 2 - ts Here, bs(mm) is the nominal web length (distance between flanges including the actual plate thickness), and R is the radius of curvature (mm) at the center of the corner plate thickness.

[0024] If bs = 90 mm, R = 1.5 × ts, and ts = 1.2 mm, then b = 85.2 mm. If b = 85.2 mm, t = 1.08, and F = 500, then C minThis is approximately 12.95mm, and the minimum value of D0 is 12.95mm.

[0025] D0 is C min The above is preferable. The larger the distance D0, the more the reduction in in-plane shear strength can be suppressed. On the other hand, if the distance D0 is too large, the distance between rows of elongated holes 15 becomes small, raising concerns about a decrease in thermal insulation. A D0 of 20.5 mm allows for a balance between suppressing the reduction in in-plane shear strength and maintaining thermal insulation. The width b of the plate element of the web portion 10 of the lip channel steel may be 85.2 mm, and the distance D0 may be 20.5 mm. A balance between in-plane shear strength and thermal insulation can be more reliably achieved.

[0026] The elongated holes 15 in adjacent rows R1 to R3 in the height direction 1C are offset from each other in the material axis direction 1A. The amount of offset in the arrangement of the elongated holes 15 in the material axis direction 1A may be half the extended width of the elongated holes 15 in the material axis direction 1A. The extended width of each elongated hole 15 in the height direction 1C may be 4 mm, and the spacing between the elongated holes 15 in the height direction 1C may be 11 mm.

[0027] Next, Figure 3 is a cross-sectional view showing the exterior wall structure 2 equipped with the wall base member 1 of Figure 1, Figure 4 is a bottom view showing the exterior wall structure 2 of Figure 3, and Figure 5 is an explanatory diagram showing the state of the umbrella portion 212 of Figure 3 before deformation.

[0028] As shown in Figures 3 and 4, the exterior wall structure 2 of this embodiment includes a wall base member 1, an exterior wall member 20, and a one-side bolt 21.

[0029] As described above, the wall base member 1 is made up of longitudinal lip channel steel.

[0030] The exterior wall member 20 is joined to the outer surface of the web portion 10 of the wall base member 1. In this embodiment, the exterior wall member 20 has a plate-shaped exterior wall body 200 and a square pipe 201 attached to the back surface of the exterior wall body 200. The exterior wall body 200 constitutes the exterior wall of, for example, a house, and is composed of, for example, an exterior wall. The square pipe 201 is fixed to the back surface of the exterior wall body 200. The dimensions of the wall base member 1 are, for example, 60 mm (wall width direction) x 24 mm (wall thickness direction), and the dimensions of the exterior wall body 200 are, for example, 16 mm (wall thickness direction).

[0031] The one-side bolt 21 has an operating part located inside the wall base member 1 (the space enclosed by the web portion 10, the first flange portion 11, and the second flange portion 12), and is configured so that the exterior wall member 20 (more specifically, the square pipe 201) can be fastened to the wall base member 1 by operating the operating part.

[0032] The one-sided bolt 21 may have various configurations, but the one-sided bolt 21 in this embodiment has a shaft body 210 with male threads on its outer circumference, a nut body 211 with female threads on its inner circumference that are screwed into the male threads of the shaft body 210, and a umbrella portion 212 fixed to one end of the shaft body 210. The umbrella portion 212 is made up of a plate-shaped member fixed to one end of the shaft body 210. As shown in Figure 5, the umbrella portion 212 is formed to widen towards the other end of the shaft body 210.

[0033] The one-side bolt 21 is inserted into the interior of the wall base member 1 through the gap between the first lip portion 13 and the second lip portion 14, and the umbrella portion 212 is inserted into the interior of the square pipe 201 through the through hole provided in the web portion 10 and the square pipe 201. The umbrella portion 212 deforms as it passes through the through hole and then expands inside the square pipe 201 (see Figure 5). The nut body 211 has a larger diameter than the through hole and remains inside the wall base member 1 pressed against the inner surface of the web portion 10 (see Figure 5). In this state, the shaft body 210 or the nut body 211 is rotated to pull the shaft body 210 back (see Figure 3). That is, in the illustrated configuration, the shaft body 210 or the nut body 211 constitutes the operating part. At this time, the umbrella portion 212 cannot pass through the through hole and restricts the pulling back of the shaft body 210 (see Figure 3). The nut body 211 and the deformed umbrella portion 212 allow the web portion 10 and the square pipe 201 to be fastened together. In other words, by using the wall base member 1 of this embodiment with a weak axis, it becomes possible to join the outer wall member 20 to the wall base member 1 by operation from the inside.

[0034] Although preferred embodiments of the present invention have been described in detail above with reference to the attached drawings, the present invention is not limited to these examples. It is clear to any person with ordinary skill in the art to which the present invention belongs that various modifications or alterations can be conceived within the scope of the technical idea described in the claims, and these are also understood to fall within the technical scope of the present invention. [Examples]

[0035] The present invention will be described more specifically below with reference to examples. The present invention is not limited to these examples.

[0036] The outer wall structure was modeled to investigate the heat insulation performance of the outer wall structure. The modeled outer wall structure is as shown in FIGS. 6 - 8. That is, a plurality of lip channel steels are arranged at intervals in the width direction of the outer wall structure, and wooden pieces are arranged inside the lip channel steels at intervals in the material axis direction of the lip channel steels. An inner wall wooden beam is arranged on the outer surface of the web part of the lip channel steel, and a gypsum board is arranged on the outer surface of the inner wall wooden beam. Heat insulating materials (glass wool and foamed resin) are arranged around the lip channel steel and inside the inner wall wooden beam. The units of the numerical values in FIGS. 6 - 8 and subsequent FIG. 9 are mm. The thermal conductivity of each part in the model was set as follows.

[0037]

Table 1

[0038] For numerical analysis, under the environment of OS: Windows (registered trademark) 11, Version: Marc2023, the general-purpose finite element analysis program MSC One (Marc_Mentat / 2022 .4) was used. The type of analysis was unsteady heat conduction analysis. Solid elements were used, and the number of elements was about 3.5 million in each case. The heat boundary conditions were 0°C on the outdoor side, 20°C on the indoor side, and the remaining boundaries were adiabatic boundaries. Also, the heat transfer coefficient was 9.1 W / m 2 ·K on the outdoor side and the indoor side.

[0039] In this model, the heat transfer rate was calculated while changing the presence or absence of the long holes in the flange part of the lip channel steel and the plate thickness of the lip channel steel. The results are shown in Table 2 below.

[0040]

Table 2

[0041] In Table 2, "with holes" indicates that elongated holes are provided in the first and second flange portions of the lip channel steel, as shown in Figure 9, while "without holes" indicates that elongated holes are not provided in the first and second flange portions. In Table 2, "ratio" shows the ratio of each heat transfer coefficient to the heat transfer coefficient when using a lip channel steel without holes with a plate thickness of 2.3 mm.

[0042] A lower thermal transmittance indicates higher thermal insulation performance for the exterior wall structure. As can be seen from comparing the thermal transmittance of a 2.3mm thick lip channel steel without holes with that of a 1.2mm thick lip channel steel without holes, it is clear that the thinner the plate, the lower the thermal transmittance and the better the thermal insulation performance of the exterior wall structure tends to be.

[0043] As can be seen from the comparison between the thermal transmittance when using 2.3 mm thick lip channel steel without holes and when using 2.3 mm thick lip channel steel with holes, it was confirmed that providing elongated holes in the first and second flange portions lowers the thermal transmittance and improves the insulation performance of the exterior wall structure. Furthermore, the thermal transmittance when using 2.3 mm thick lip channel steel with holes was lower than that when using 1.2 mm thick lip channel steel without holes.

[0044] As can be seen from the comparison of thermal transmittance for "perforated" materials, it was confirmed that even with "perforated" materials, the thinner the plate thickness, the lower the thermal transmittance tends to be, and the better the insulation performance of the exterior wall structure. [Explanation of Symbols]

[0045] 1: Wall base material 1A: Material axis direction 2: Exterior wall structure 10: Web Department 11: First flange section 12: Second flange section 13: First lip section 14: Second lip section 15: Long hole 20: Exterior wall components 21: One-sided bolt 200: Exterior wall 201: Square pipe

Claims

1. A wall base member comprising a longitudinal lip channel steel having a web portion, a first flange portion and a second flange portion extending from both ends of the web portion, and a first lip portion and a second lip portion extending in a direction toward each other from the tips of the first flange portion and the second flange portion, wherein an outer wall member is joined to the outer surface of the web portion, The first flange portion and the second flange portion are provided with a plurality of elongated holes extending in the material axis direction in a staggered pattern, and the ratio W1:W2 of the width W1 of the elongated holes in the material axis direction to the width W2 between the elongated holes in the material axis direction is 10:

1. Wall base material.

2. The thickness of the aforementioned lip channel steel is 0.8 mm or more and 2.3 mm or less. The wall base member according to claim 1.

3. A wall base member according to claim 1 or 2, The outer wall member joined to the outer surface of the web portion and It is equipped with External wall structure.

4. The wall base member has an operating part located inside the wall base member, and further includes a one-side bolt that fastens the outer wall member to the wall base member by operating the operating part. The exterior wall structure according to claim 3.

5. The exterior wall member comprises a plate-shaped exterior wall body and a square pipe attached to the back surface of the exterior wall body, and the one-sided bolt fastens the square pipe to the wall base member. The exterior wall structure according to claim 4.

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