Runner and partition wall

Abstract

To suppress a scraping sound which can be generated in a structure manufactured using a runner without increasing a workload in manufacturing a structure such as a partition wall using the runner as a base material of a building and a cost of a member around the runner and without causing a concern of maintenance after construction.SOLUTION: In a runner 1 which is a base material for a building including a base plate 1B and a side plate 1S bent from at least one of both ends of the base plate 1B, the static friction coefficient of at least one of two surfaces of the side plate 1S facing each other in the thickness direction of the side plate 1S is set to a predetermined value or less.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to runners and partition walls.

Background Art

[0002] A partition wall having an upper runner supported by a ceiling structure (ceiling slab) of a building, a lower runner supported by a floor structure (floor slab) of the building, a plurality of studs supported between the upper runner and the lower runner and arranged at intervals in the horizontal direction, and a wall member supported in a state straddling the plurality of studs has been conventionally known.

[0003] There are various types of partition walls that support wall members on studs. Specific examples include, for example, a single-sided double-sheet type and a double-sided double-sheet type. Among these, in the single-sided double-sheet type, a wall member is fixed to one side of the stud, and the wall member has a bottom sheet fixed to the stud and a top sheet fixed to the bottom sheet. On the other hand, in the double-sided double-sheet type, wall members are fixed to both sides of the stud, and each wall member has a bottom sheet and a top sheet.

[0004] In such a wall member having a top sheet and a bottom sheet, usually, each of the top sheet and the bottom sheet is formed by a plurality of facing materials arranged to form a wall shape.

[0005] In some cases, fire resistance performance is required for partition walls. In this case, as the facing material constituting the wall member, a non-combustible facing material such as a gypsum board or a calcium silicate board may be used. In such a conventional single-sided double-sheet type and double-sided double-sheet type partition wall using a gypsum board or the like, usually, the facing material constituting the bottom sheet is fixed to the stud by screws or the like, and the facing material constituting the top sheet is fastened to the facing material constituting the bottom sheet with an adhesive and fixed by staples, screws, or the like.

[0006] By the way, it has been conventionally known that such partition walls can generate abnormal sounds called frictional sounds. The frictional sounds are considered to be caused by the inter-story displacement of the building, but the fundamental mechanism of their generation has not yet been clearly elucidated.

[0007] As technologies for suppressing frictional sounds, various ones have been proposed so far. For example, Patent Document 1 and Patent Document 2 disclose a partition wall that forms a relief in the portion of the facing material facing the upper runner so as not to bring the upper runner into contact with the facing material, a partition wall that provides a spacer between the facing material and the stud, and the like.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0009] However, when forming a relief in the facing material as described above, it takes time and effort for the processing of the facing material, and the processing cost increases. Also, when providing a spacer between the facing material and the stud, it takes time and effort for the attachment work of the spacer. In addition, the spacer may fall off due to long-term use. It is extremely difficult to repair the spacer in a completed building. Also, a method of attaching a tape to the surface of the runner facing the facing material is also known. However, this method is also time-consuming. Also, the thickness of the tape may affect the finish.

[0010] In view of the above, the problem to be solved by the present invention is to suppress the rubbing noise that may occur in a structure made using a runner, without increasing the work burden when manufacturing a structure such as a partition wall using the runner, which is a base material for a building, and without increasing the cost of members around the runner, and also without causing concerns about post-construction maintenance.

Means for Solving the Problem

[0011] The present invention relates to the following [1] to

[13] .

[0012] [1] A runner, which is a base material for a building, comprising a base plate and side plates that bend from at least one of both ends of the base plate, wherein at least one of the two surfaces of the side plates that face each other in the thickness direction of the side plates has a coefficient of static friction of 0.20 or less when derived based on the following procedures (A1) to (A4). (A1) Install the side plate, which is the object for deriving the coefficient of static friction, along the installation surface of the pedestal and fix it to the pedestal. (A2) Bring the contact surface of a friction material, which has a contact surface with a width of 10 mm and a shape in a cross section orthogonal to the width direction that is an arc surface with a radius of curvature of 5 mm, into contact with the surface of the side plate through a base paper for gypsum board having a smoothness of 10 seconds or more and 20 seconds or less as measured in accordance with JIS P 8155:2010, and apply a load of 0.2 kgf from the contact surface to the side plate. (A3) While applying the load from the contact surface through the base paper for gypsum board, relatively move the friction material in one direction parallel to the installation surface at a speed of 0.17 mm / s, and specify the static frictional force Fs between the friction material and the side plate. [[ID=?]] (A4) Derive the coefficient of static friction by dividing the static frictional force Fs by a normal force of 0.2 kgf.

[0013] [2] When, in the procedure (A3), the dynamic frictional force Fd between the friction material and the side plate is specified within a predetermined movement range after the friction material has been moved 2 mm or more, and the coefficient of dynamic friction is derived by dividing the dynamic frictional force Fd by a normal force of 0.2 kgf, It should be noted that there seems to be an unclear tag in the original text which is maintained as is in the translation. If this is an error in the original, it may need to be corrected for a more accurate translation.The runner according to [1], wherein the coefficient of kinetic friction of the surface of the side plate, where the coefficient of static friction is 0.20 or less, is 0.13 or less.

[0014] [3] A runner which is a building subfloor material including a base plate and side plates bent from at least one of both ends of the base plate, A runner, wherein at least one of the two surfaces of the side plate facing each other in the thickness direction of the side plate has a coefficient of static friction of 0.19 or less when derived based on the following procedures (B1) to (B4). (B1) Install the side plate as an object for deriving the coefficient of static friction along the installation surface of the pedestal and fix it to the pedestal. (B2) Contact the contact surface of a friction material having a contact surface with a width of 10 mm and a shape in a cross section orthogonal to the width direction being an arc surface with a radius of curvature of 5 mm, through a base paper for gypsum board having a smoothness of 10 seconds or more and 20 seconds or less as measured according to JIS P 8155:2010, with the surface of the side plate, and apply a load of 1.2 kgf to the side plate from the contact surface. (B3) While applying the load from the contact surface through the base paper for gypsum board, relatively move the friction material in one direction parallel to the installation surface at a speed of 3.3 mm / s, and specify the coefficient of static friction Fs between the friction material and the side plate. (B4) Divide the coefficient of static friction Fs by a normal force of 1.2 kgf to derive the coefficient of static friction.

[0015] [4] When, in the procedure (B3), after moving the friction material by 2 mm or more, the coefficient of kinetic friction Fd between the friction material and the side plate is specified within a predetermined movement range, and the coefficient of kinetic friction is derived by dividing the coefficient of kinetic friction Fd by a normal force of 1.2 kgf, The runner according to [3], wherein the coefficient of kinetic friction of the surface of the side plate, where the coefficient of static friction is 0.19 or less, is 0.16 or less.

[0016] [5] A runner which is a building subfloor material including a base plate and side plates bent from at least one of both ends of the base plate, A runner in which at least one of the two surfaces of the side plates facing each other in the thickness direction of the side plates has a static friction coefficient of 0.11 or less when derived based on the following procedures (C1) to (C4). (C1) Install the side plate as an object for deriving the static friction coefficient along the installation surface of the pedestal and fix it to the pedestal. (C2) Bring the sphere of the friction material having a stainless steel sphere with a radius of 3 mm into contact with the surface of the side plate, and apply a load of 0.2 kgf from the sphere to the side plate. (C3) While applying the load from the sphere, move the friction material relative to the installation surface in one direction parallel to the installation surface at a speed of 3.3 mm / s, and specify the static friction force Fs between the friction material and the side plate. (C4) Derive the static friction coefficient by dividing the static friction force Fs by a normal force of 0.2 kgf.

[0017] [6] When, in the procedure (C3), the dynamic friction force Fd between the friction material and the side plate is specified within a predetermined movement range after the friction material has been moved 2 mm or more, and the dynamic friction coefficient is derived by dividing the dynamic friction force Fd by a normal force of 0.2 kgf, the dynamic friction coefficient of the surface of the side plate where the static friction coefficient is 0.11 or less is 0.07 or less, the runner according to [5].

[0018] [7] The surface of the side plate is formed by a lubricating surface layer, the runner according to any one of [1] to [6].

[0019] [8] The lubricating surface layer contains one or more of polyolefin, fluororesin, polyacetal, PEEK, PPS, polyamide, molybdenum disulfide, tungsten disulfide, graphite, and graphite fluoride, the runner according to [7].

[0020] [9] The lubricating surface layer is made of a lubricating resin, the runner according to [7] or [8].

[0021]

[10] The lubricating surface layer forms the entire surface of the runner, the runner according to any one of [7] to [9].

[0022]

[11] The static friction coefficient (and the dynamic friction coefficient) is a value derived based on the frictional force measured by the multi-functional static and dynamic friction measuring machine TL201Tt manufactured by Trinity Lab Co., Ltd. as a device including the pedestal and the friction material, the runner according to any one of [1] to

[10] .

[0023]

[12] A runner which is a base material for a building including a base plate and side plates bent from at least one of both ends of the base plate, The entire surface of the runner is formed by a lubricating surface layer, the runner.

[0024]

[13] An upper runner supported by a ceiling structure of a building, A lower runner supported by a floor structure of the building and disposed below the upper runner, A stud supported between the upper runner and the lower runner and extending in the vertical direction, A wall member supported by the stud so as to face the upper runner, the lower runner and the stud, At least as the upper runner, the runner according to any one of [1] to

[12] is used, the partition wall.

Advantages of the Invention

[0025] According to the present invention, without increasing the work burden when manufacturing a structure such as a partition wall using a runner which is a base material for a building and the cost of members around the runner, and without causing concerns about maintenance after construction, it is possible to suppress the rubbing noise that may occur in the structure manufactured using the runner.

Brief Description of the Drawings

[0026]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0027] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0028] <Runner> FIG. 1 is a perspective view of a runner 1 according to an embodiment. The runner 1 is a base material for a building. The runner 1 is installed, for example, on a ceiling structure or a floor structure of a building. The runner 1 is a long member extending in the longitudinal direction with a predetermined cross-sectional shape such as a U-shape or an L-shape.

[0029] As shown in FIGS. 1 and 2, the runner 1 includes a base plate 1B and side plates 1S that bend from at least one of both ends of the base plate 1B. In the present embodiment, the runner 1 includes a base plate 1B and a pair of side plates 1S that bend from both ends of the base plate 1B. The runner 1 forms a U-shaped cross-sectional shape with the base plate 1B and the pair of side plates 1S, and the U-shaped cross-sectional shape is continuous in the longitudinal direction.

[0030] Note that the runner 1 may be composed of a base plate 1B and one side plate 1S. In this case, the runner 1 forms an L-shaped cross-sectional shape with the base plate 1B and the side plate 1S.

[0031] FIG. 2 shows a cross-sectional view of the runner 1 in a direction orthogonal to the longitudinal direction of the runner 1. Specifically, the runner 1 includes a main body plate portion 1M formed of a steel plate, a first layer 1L1 covering the entire surface of the main body plate portion 1M, and a second layer 1L2 covering the entire first layer 1L1. The cross-sectional shape of the main body plate portion 1M in a direction orthogonal to the longitudinal direction is U-shaped. The thickness of the main body plate portion 1M may be, for example, 0.8 mm. The first layer 1L1 may be a layer for obtaining corrosion resistance, weather resistance, durability, etc. The second layer 1L2 forms the entire surface of the runner 1.

[0032] In the present embodiment, the first layer 1L1 is formed of a hot-dip galvanized layer. That is, the first layer 1L1 is formed by immersing the main body plate portion 1M in molten zinc in a high-temperature molten state. However, the first layer 1L1 may be other functional layers. The first layer 1L1 may be formed, for example, by chromium plating, nickel plating, aluminum plating, tin plating, or the like.

[0033] The second layer 1L2 is formed of a layer that realizes low friction. In the present embodiment, the second layer 1L2 is formed of a lubricating surface layer.

[0034] The lubricating surface layer may include one or more of polyolefin, fluororesin, polyacetal, PEEK (polyetheretherketone), PPS (polyphenylene sulfide), polyamide, molybdenum disulfide, tungsten disulfide, graphite, and graphite fluoride.

[0035] In the present embodiment, as an example, the second layer 1L2 is made of a lubricating resin. The lubricating resin may be polytetrafluoroethylene (Teflon (R)), PEEK, PPS, MC nylon (monomer cast nylon), ultra-high molecular weight polyethylene, or the like.

[0036] In the present embodiment, the second layer 1L2 ensures low friction and / or lubricity of the surface of the runner 1, thereby suppressing the rubbing noise that may occur when the runner 1 comes into contact with other members and relative displacement occurs between the runner 1 and other members. Specifically, for example, when a partition wall is manufactured using the runner 1, the runner 1 suppresses the generation of rubbing noise that may occur between the surface material and the studs by ensuring low friction and / or lubricity. To achieve this, in the runner 1, the static friction coefficient of at least one of the two surfaces of the side plate 1S facing each other in the thickness direction of the side plate 1S is 0.20 or less when derived based on the following procedures (A1) to (A4).

[0037] (A1) Install the side plate 1S as an object for deriving the static friction coefficient along the installation surface of the pedestal and fix it to the pedestal. (A2) Bring the contact surface of a friction material having a contact surface with a width of 10 mm and a shape in a cross-section orthogonal to the width direction being an arc surface with a radius of curvature of 5 mm into contact with the surface of the side plate 1S via a base paper for gypsum board having a smoothness of 10 seconds or more and 20 seconds or less as measured according to JIS P 8155:2010, and apply a load of 0.2 kgf to the side plate 1S from the contact surface. (A3) Apply the load from the contact surface through the base paper for gypsum board, and move the friction material relatively at a speed of 0.17 mm / s in one direction parallel to the installation surface while applying the load, and specify the static friction force Fs between the friction material and the side plate 1S. (A4) Divide the static friction force Fs by the normal force of 0.2 kgf to derive the coefficient of static friction.

[0038] Furthermore, when the coefficient of static friction derived based on the above procedures (A1) to (A4) is 0.20 or less, the coefficient of kinetic friction of the surface of the side plate 1S is within a predetermined movement range (range from a movement distance of 2 mm to 4 mm) after moving the friction material 2 mm or more in the above procedure (A3). When the coefficient of kinetic friction is derived by specifying the kinetic friction force Fd between the friction material and the side plate 1S and dividing the kinetic friction force Fd by the normal force of 0.2 kgf, it is 0.13 or less. Here, the static friction force referred to in this specification has the same meaning as the term called static frictional force.

[0039] In addition, in procedure (A1), the pedestal is a flat plate. Here, the side plate 1S does not necessarily have to be fixed to the pedestal as it is. For example, in procedure (A1), the side plate 1S cut from the runner 1 may be fixed to the pedestal so as to fit the pedestal, or a part of the side plate cut out from the side plate 1S may be fixed to the pedestal, or the developed member obtained by bending the runner 1 into a flat plate shape may be fixed to the pedestal. This also applies to other procedures described below. Also, the pattern for specifying the coefficient of friction based on procedures (A1) to (A4) may be hereinafter referred to as the first specification pattern.

[0040] In procedure (A2), as described above, a friction material having a contact surface with a width of 10 mm and an arc surface with a curvature radius of 5 mm in a cross-section orthogonal to the width direction is used. The friction material is hard and made of metal, for example, made of stainless steel (SUS304). When using such a friction material, based on the Hertz contact formula, the contact area of the contact surface of the friction material is, for example, 0.214 mm × 10 mm, and the contact surface is regarded as linear or rectangular. This also applies to the procedure (B2) described later. In the calculation based on the Hertz contact formula here, the Young's modulus of the friction material is set to 193 GPa, and the Young's modulus of the side plate 1S (runner 1) is set to 205 GPa. Also, the base paper for gypsum board used in procedure (A2) is BB 150 g / m 2 manufactured by Oji Materia Co., Ltd., with a thickness of 0.19 to 0.20 mm. The smoothness of BB 150 g / m 2 measured according to JIS P 8155:2010 is 10 seconds or more and 20 seconds or less even considering manufacturing errors and seasonal factors. Also, the static friction force and dynamic friction force that can be specified by the operation of procedure (A3) will result in the same results as long as the smoothness of the base paper for gypsum board is in the range of 10 seconds or more and 20 seconds or less. Therefore, the smoothness of the base paper for gypsum board used in procedure (A2) is set to 10 seconds or more and 20 seconds or less. This also applies to the procedure (B2) described later. Also, in procedure (A3), the friction material is moved in a direction orthogonal to its width direction. This also applies to the procedure (B3) described later.

[0041] When obtaining the static friction coefficient and dynamic friction coefficient of the side plate 1S in the above-described first specific pattern, the static friction coefficient and dynamic friction coefficient of the side plate 1S become the above-described values (static friction coefficient ≤ 0.20, dynamic friction coefficient ≤ 0.13), while the static friction coefficient of the side plate 1S becomes 0.19 or less when derived based on the following procedures (B1) to (B4).

[0042] (B1) Install the side plate 1S as an object for deriving the static friction coefficient along the installation surface of the pedestal and fix it to the pedestal. (B2) The contact surface of the friction material having a contact surface with a width of 10 mm and an arc surface with a radius of curvature of 5 mm in a cross-section orthogonal to the width direction is brought into contact with the surface of the side plate 1S through the base paper for gypsum board whose smoothness measured according to JIS P 8155:2010 is 10 seconds or more and 20 seconds or less, and a load of 1.2 kgf is applied to the side plate 1S from the contact surface. (B3) While applying the above load from the contact surface through the base paper for gypsum board, the friction material is relatively moved in one direction parallel to the installation surface at a speed of 3.3 mm / s, and the static friction force Fs between the friction material and the side plate 1S is specified. (B4) The static friction coefficient is derived by dividing the static friction force Fs by the normal force of 1.2 kgf.

[0043] In addition, the dynamic friction coefficient of the surface of the side plate 1S for which the static friction coefficient derived based on the above procedures (B1) to (B4) is 0.19 or less is such that, in a predetermined movement range (range from a movement distance of 2 mm to 4 mm) after moving the friction material 2 mm or more in the above procedure (B3), the dynamic friction force Fd between the friction material and the side plate 1S is specified, and when the dynamic friction coefficient is derived by dividing the dynamic friction force Fd by the normal force of 1.2 kgf, it is 0.16 or less.

[0044] Note that the specific pattern of the friction coefficient based on the procedures (B1) to (B4) may sometimes be hereinafter referred to as the second specific pattern. The base paper for gypsum board used in the procedure (B2) is the same as above, BB 150 g / m 2 manufactured by Oji Materia Co., Ltd., with a thickness of 0.19 to 0.20 mm. The smoothness of BB 150 g / m 2 measured according to JIS P 8155:2010 is 10 seconds or more and 20 seconds or less even considering manufacturing errors and seasonal factors.

[0045] In addition, the static friction coefficient of the side plate 1S becomes 0.11 or less when derived based on the following procedures (C1) to (C4).

[0046] (C1) The side plate 1S as an object for deriving the static friction coefficient is installed along the installation surface of the pedestal and fixed to the pedestal. (C2) Contact the sphere of the friction material having a stainless-steel sphere with a radius of 3 mm to the surface of the side plate 1S, and apply a load of 0.2 kgf from the sphere to the side plate 1S. (C3) While applying the above load from the sphere, move the friction material relatively in one direction parallel to the installation surface at a speed of 3.3 mm / s, and specify the static frictional force Fs between the friction material and the side plate. (C4) Divide the static frictional force Fs by the normal force of 0.2 kgf to derive the coefficient of static friction.

[0047] And when the coefficient of static friction derived based on the above procedures (C1) to (C4) is 0.11 or less, the coefficient of kinetic friction of the surface of the side plate 1S is within a predetermined movement range (range from a movement distance of 2 mm to 4 mm) after moving the friction material 2 mm or more in the above procedure (C3). When specifying the kinetic frictional force Fd between the friction material and the side plate 1S and dividing the kinetic frictional force Fd by the normal force of 0.2 kgf to derive the coefficient of kinetic friction, it becomes 0.07 or less.

[0048] Note that the pattern for specifying the coefficient of friction based on the procedures (C1) to (C4) may be hereinafter referred to as the third specifying pattern.

[0049] In the present embodiment, as described above, the second layer 1L2 forms the entire surface of the runner 1. Therefore, although errors may occur, the coefficients of static and kinetic friction of the surface (flat surface) of the runner 1 are basically the same value as a whole. On the other hand, the runner 1 may be formed such that the coefficient of friction at only the position where contact with other members is planned is lower than that of other parts. For example, a solid lubricant may be applied to only the side plate 1S of the runner 1 by spraying to form the second layer 1L2, and a runner 1 may be produced in which the coefficient of friction of the side plate 1S is smaller than that of other parts. The coefficient of friction of the second layer 1L2 formed by applying the solid lubricant may be the same as the conditions of the coefficients of static and kinetic friction of the surface of the side plate 1S described above.

[0050] Also, in the first layer 1L1 mainly for obtaining corrosion resistance, weather resistance, durability, etc., if at least any one of the conditions of a static friction coefficient of 0.20 or less and / or a dynamic friction coefficient of 0.13 or less based on the above-described first specific pattern, a static friction coefficient of 0.19 or less and / or a dynamic friction coefficient of 0.16 or less based on the above-described second specific pattern, and a static friction coefficient of 0.11 or less and / or a dynamic friction coefficient of 0.07 or less based on the third specific pattern can be ensured, the second layer 1L2 may not be formed.

[0051] <Method for specifying friction coefficient> FIG. 3 is a diagram schematically showing a measuring device 50 used for measuring the frictional force and friction coefficient of the runner 1.

[0052] The measuring device 50 shown in FIG. 3(A) includes a base portion 51 installed on a floor surface, a table, etc., a pedestal 52 supported on the base portion 51, fixing portions 53 provided on both end sides of the pedestal 52, a friction jig unit 55 holding a friction material 54, and a weight 56 installed on the friction jig unit 55. The base portion 51 is installed on a horizontal floor surface, a table, etc. The pedestal 52 is movable in one direction (horizontal direction in the illustrated example) on the base portion 51 by a driving portion such as a motor. In FIG. 3, a state where a side plate 1S is fixed to the pedestal 52 is shown.

[0053] In the above-described procedures (A1), (B1), and (C1), the side plate 1S is installed along the installation surface of the pedestal 52 whose plate surface is along the horizontal direction and is fixed by the fixing portion 53. The fixing portion 53 is configured to be tightened (approached) to the pedestal 52 side in response to tightening with a bolt or the like, and sandwiches and fixes the side plate 1S between it and the pedestal 52.

[0054] The friction material 54 is detachably attached to the friction jig unit 55. The first friction material 54-1 used in the first specific pattern and the second specific pattern is shown in FIGS. 3(B1) and (B2). The friction material 54-1 has a width of 10 mm and has a contact surface 54-1C whose shape in a cross section orthogonal to the width direction is an arc surface with a radius of curvature of 5 mm. The friction material 54-1 is triangular prism-shaped, and one of the corners forms the contact surface 54-1C. In FIG. 3(B1), the contact surface 54-1C is shown surrounded by a two-dot chain line. FIG. 3(B2) shows a cross section in a direction orthogonal to the width direction of the contact surface 54-1C. Further, the first friction material 54-1 has a clamp portion 58 that can detachably fix paper or a film. In FIG. 3(B1), the base paper P for gypsum board on the contact surface 54-1C is shown by a two-dot chain line. The base paper P for gypsum board is fixed by the clamp portion 58 in a state of covering the contact surface 54-1C of the friction material 54-1. By fixing the base paper P for gypsum board by the clamp portion 58, the base paper P for gypsum board can be slid on the surface of the side plate 1S in the procedures (A3) and (B3) described above.

[0055] FIGS. 3(C1) and (C2) show the friction material 54-2 used in the third specific pattern. The friction material 54-2 has a stainless steel (SUS304) sphere 59, and the tip of the friction material 54-2 is formed by a part of the spherical surface of the sphere 59. FIG. 3(C2) shows an image of the contact range of the sphere 59 with respect to the side plate 1S. The contact by the sphere 59 is assumed to be point contact. When the friction material 54-2 having the stainless steel sphere 59 is used, based on the Hertz contact formula, the contact area of the contact surface of the sphere 59 is, for example, 0.09π mm 2 and the contact can be regarded as point contact.

[0056] In the friction jig unit 55, the weight 56 can be detachably installed. By adjusting the number and weight of the weights 56 to be installed, the friction jig unit 55 can apply a desired load to the side plate 1S, which is the object for deriving the friction coefficient. For example, when performing the specification according to the first specific pattern and the third specific pattern, a 0.2 kg weight 56 is installed in the friction jig unit 55. Thereby, a load of 0.2 kgf can be applied from the friction material 54 to the side plate 1S. When performing the specification according to the second specific pattern, a 1.2 kg weight 56 is installed in the friction jig unit 55.

[0057] While applying a load from the friction material 54 to the side plate 1S, which is the object for deriving the friction coefficient, the friction jig unit 55 can move the friction material 54 in a direction parallel to the installation surface of the pedestal 52 by a driving unit such as a motor. By moving the friction material 54 while applying a load to the object for deriving the friction coefficient from the friction material 54, the static friction force Fs and the dynamic friction force Fd between the friction material 54 and the side plate 1S are detected by a sensor. At this time, the pedestal 52 is not moved. The sensor in the friction jig unit 55 detects the static friction force Fs and the dynamic friction force Fd by detecting the force applied in the horizontal direction from the friction material 54. Then, the friction jig unit 55 can provide the detected static friction force Fs and dynamic friction force Fd to the computer 60. The calculation of the friction coefficient based on the static friction force Fs and the dynamic friction force Fd in the above-mentioned procedures (A4), (B4), and (C4) may be performed by the computer 60. Note that the static friction force Fs and the dynamic friction force Fd may be detected by moving the pedestal 52 without moving the friction material 54.

[0058] Specifically, the above measurement device 50 is a multifunctional static and dynamic friction measurement machine TL201Tt manufactured by Trinity Lab Co., Ltd. That is, in the present embodiment, the static friction coefficient and the dynamic friction coefficient derived from the above-described first specific pattern, second specific pattern, and third specific pattern are values derived based on the frictional force measured by the multifunctional static and dynamic friction measurement machine TL201Tt manufactured by Trinity Lab Co., Ltd. Note that the static friction coefficient and the dynamic friction coefficient of the runner 1 may be derived based on the frictional force measured by a device capable of performing measurements equivalent to those of the multifunctional static and dynamic friction measurement machine TL201Tt.

[0059] FIG. 4 shows a graph of the frictional force of the runner 1 (side plate 1S) derived by the first specific pattern using the measurement device 50 (upper side of FIG. 4) and a graph of the frictional force of a comparative example (lower side of FIG. 4). The comparative example is a general runner whose surface is formed by a hot-dip galvanized layer, and the graph of the comparative example shows the frictional force of the surface of the portion corresponding to the side plate measured by the measurement device 50. In the graphs of the embodiment and the comparative example shown in FIG. 4, the measurement results of the frictional force for five samples (N1 to N5) are shown. The horizontal axis of the graph indicates the displacement of the friction material 54-1, and the vertical axis indicates the frictional force (N).

[0060] As is clear from comparing the graph of the embodiment and the graph of the comparative example in FIG. 4, the frictional force measured for the runner 1 according to the embodiment is smaller than the frictional force measured in the comparative example.

[0061] FIG. 5 shows a graph of the frictional force of the runner 1 (side plate 1S) derived by the second specific pattern using the measurement device 50 (upper side of FIG. 5) and a graph of the frictional force of a comparative example (lower side of FIG. 5). FIG. 6 shows a graph of the frictional force of the runner 1 (side plate 1S) derived by the third specific pattern using the measurement device 50 (upper side of FIG. 6) and a graph of the frictional force of a comparative example (lower side of FIG. 6). The runner according to the comparative example shown in FIGS. 5 and 6 is the same as that in FIG. 4. Also in the graphs of the embodiment and the comparative example shown in FIGS. 5 and 6, the frictional force is measured for five samples (N1 to N5).

[0062] Also in the results of FIGS. 5 and 6, the frictional force measured by the runner 1 according to the embodiment is smaller than the frictional force measured in the comparative example.

[0063] FIG. 7 shows a table regarding the measurement results of FIGS. 4 to 6. The static frictional force (Fs) in the table in FIG. 7 is specified from the average of the maximum static frictional forces of the five samples measured in FIGS. 4 to 6. The maximum static frictional force is the extreme value of the force applied to the friction material 54 immediately before the friction material 54 starts to move (for example, the position indicated by reference numeral P1 in FIG. 4). The dynamic frictional force (Fd) in the table in FIG. 7 is specified from the average of the dynamic frictional forces within a predetermined movement range of the five samples measured in FIGS. 4 to 6. The predetermined movement range is the range from the position where the friction material 54 is moved 2 mm with respect to the initial stationary position of the friction material 54 to the position where the friction material 54 is moved 4 mm with respect to the initial stationary position until the friction material 54 is moved.

[0064] When checking the static frictional force (Fs) and the dynamic frictional force (Fd) shown in the table of FIG. 7, the static frictional force (Fs) and the dynamic frictional force (Fd) in the embodiment are smaller than those in the comparative example in all specific patterns. And in FIG. 7, the static friction coefficient (μs) and the dynamic friction coefficient (μk) derived based on the static frictional force (Fs) and the dynamic frictional force (Fd) in the embodiment and the comparative example are shown. The static friction coefficient (μs) and the dynamic friction coefficient (μk) are calculated by dividing the static frictional force (Fs) and the dynamic frictional force (Fd) by the load (normal force) applied from the friction material 54 to the side plate 1S, respectively. In the calculation of the static friction coefficient (μs) and the dynamic friction coefficient (μk), the static friction coefficient (μs) and the dynamic friction coefficient (μk) are represented by numerical values up to two decimal places with the third decimal place rounded off.

[0065] When checking the static friction coefficient (μs) and the dynamic friction coefficient (μk) shown in the table of FIG. 7, the static friction coefficient (μs) and the dynamic friction coefficient (μk) in the embodiment are smaller than those in the comparative example.

[0066] As described above, the static friction coefficient (μs) and the kinetic friction coefficient (μk) of the runner 1 according to the present embodiment are smaller than the static friction coefficient (μs) and the kinetic friction coefficient (μk) of a runner having a conventional hot-dip galvanized layer. Thereby, the runner 1 according to the present embodiment can suppress the generation of rubbing noise that may occur when it comes into contact with other members and relative displacement occurs between the runner 1 and other members.

[0067] <Partition wall> FIG. 8 is a partially broken perspective view of the partition wall W including the above-described runner 1. The partition wall W described below partitions the internal space of a building in the horizontal direction. However, the partition wall W to which the runner 1 is applied is not limited to a wall body that partitions the internal space of a building in the horizontal direction, but is a concept including a wall body that partitions the internal space and the external space of a building, a wall body that constitutes a ceiling that partitions the internal space of a building in the vertical direction, and the like.

[0068] The partition wall W includes a runner 1 (hereinafter referred to as the upper runner 1) supported by a ceiling structure (ceiling slab) U of a building, a runner 2 (hereinafter referred to as the lower runner 2) supported by a floor structure (floor slab) D of the building, a plurality of columnar studs 6 supported between the upper runner 1 and the lower runner 2 and arranged at intervals, in this example, at equal intervals in the horizontal direction, and a wall surface member 10 supported by the studs 6 so as to straddle the plurality of studs 6. In the partition wall W, as the upper runner supported by the ceiling structure of the building, the runner 1 according to the above-described embodiment is used. The lower runner 2 is a general runner formed by a hot-dip galvanized layer on the surface of a steel plate, but the runner 1 according to the above-described embodiment may be used for the lower runner 2.

[0069] Figure 9 is a cross-sectional view taken along line IX-IX of Figure 8. As shown in Figure 2, the upper runner 1 is installed so that the U-shaped cross-sectional part composed of the base plate 1B and a pair of side plates 1S opens downward. The upper runner 1 is fixed to the surface of the ceiling housing U using a locking tool such as a runner fixing pin. The lower runner 2 is fixed to the surface of the floor housing D using a locking tool such as a runner fixing pin.

[0070] The stud 6 is a member formed by processing a metal plate material (for example, a hot-dip galvanized steel plate with a thickness of 0.4 mm) into a substantially U-shape or C-shape. The stud 6 has a pair of side plates 6S facing each other in the thickness direction of the partition wall W and at least one web connecting the pair of side plates 6S. The stud 6 is columnar and is provided such that its longitudinal direction is along the vertical direction (up and down direction).

[0071] The upper end of each stud 6 is inserted between the pair of side plates 1S of the upper runner 1, and the lower end of each stud 6 is inserted between the pair of side plates of the lower runner 2. And each stud 6 is fixed to each of the upper runner 1 and the lower runner 2. Thereby, the plurality of studs 6 are arranged horizontally between the ceiling housing U (upper runner - 1) and the floor housing D (lower runner - 2).

[0072] As shown in Figure 9, the stud 6 in this example is inserted between the side plates 1S of the upper runner 1 and is fixed in a state of contacting the inner surface of one (left side) of the pair of side plates 1S. The stud 6 is also fixed in a state of contacting the inner surface of one of the pair of side plates on the side plates of the lower runner 2. And in this example, the plurality of studs 6 arranged horizontally are in a so-called stagger stud. That is, the plurality of studs 6 arranged horizontally are alternately fixed to the inner surface of one of the pair of side plates of each of the upper runner 1 and the lower runner 2 and the inner surface of the other. Reference numeral 40 in Figure 9 indicates a stagger spacer provided in the space between the stud 6 and the other of the pair of side plates 1S of the upper runner 1.

[0073] Note that the fixing state of the upper runner 1 and the lower runner 2 with respect to the stud 6 is not particularly limited, and the stud 6 may be fixed in a state of being in contact with the inner surfaces of both of a pair of side plates of the upper runner 1 and the lower runner 2.

[0074] The partition wall W shown in FIGS. 8 and 9 is of a so-called double-sided two-layer type, and a pair of wall members 10 are supported by the stud 6 with the stud 6 sandwiched therebetween. Since each of the pair of wall members 10 is a two-layer structure, it includes a wall-shaped underlay 21 supported by the stud 6 and a wall-shaped overlay 31 arranged so as to overlap the underlay 21 and supported by the underlay 21.

[0075] The underlay 21 has a plurality of underlay sheets 22, and the overlay 31 has a plurality of overlay sheets 32. In the following description, in the wall member 10, the side facing the stud 6 is referred to as the back side (rear surface side), the opposite side is referred to as the front side (front surface side), and the front and back surfaces of the underlay 21 and the underlay sheets 22, as well as the front and back surfaces of the overlay 31 and the overlay sheets 32, are defined based on the positional relationship with the stud 6.

[0076] The underlay 21 in the wall member 10 has a plurality of underlay sheets 22 arranged in a planar manner so as to form a wall shape as shown in FIG. 8, and each underlay sheet 22 is supported by the stud 6 with its back surface facing the stud 6 side. The underlay sheet 22 is a rectangular plate-like member made of a gypsum board. Specifically, the gypsum board used as the underlay sheet 22 in the present embodiment contains at least one of inorganic fibers such as glass fibers and inorganic aggregates in addition to gypsum, thereby improving the fire resistance. However, the material of the underlay sheet 22 may be any material that can be supported by the stud 6 and can improve, for example, the fire resistance. It may be a gypsum board that does not contain inorganic fibers or inorganic aggregates as described above, or a gypsum board containing other additives. Further, the underlay sheet 22 may be a calcium silicate board.

[0077] As shown in Fig. 8, each bottom lining material 22 is fixed by having a fixing member 23 such as a tapping screw or a screw penetrate from the surface and being inserted into the stud 6 through the fixing member 23. A plurality of fixing members 23 are inserted into one stud 6 so as to be arranged in the vertical direction along the stud 6.

[0078] As shown in Figs. 8 and 9, the bottom lining material 22 adjacent to the upper runner 1 among the plurality of bottom lining materials 22 is arranged in a state of facing the outer surface of the side plate 1S of the upper runner 1 and the outer surface of the side plate 6S of the stud 6, and is fixed to the stud 6 by the fixing member 23. The outer surface of the side plate 1S of the upper runner 1 and the outer surface of the side plate 6S of the stud 6 mean the surfaces facing the out-of-plane direction among the surfaces of the side plates 6S of the upper runner 1 and the stud 6, and are the surfaces planned to face the bottom lining material 22.

[0079] Specifically, the bottom lining material 22 is a gypsum board. The bottom lining material 22 made of a gypsum board has a plate-shaped gypsum board core material and a base paper for gypsum board fixed so as to cover at least the front and back surfaces of the gypsum board core material. In the bottom lining material 22, the back surface of the gypsum board formed of the base paper for gypsum board faces both the outer surface of the side plate 1S of the upper runner 1 and the outer surface of the side plate 6S of the stud 6. Thus, the bottom lining material 22 made of a gypsum board is fixed to the stud 6 in a state where the back surface of the gypsum board formed of the base paper for gypsum board faces both the outer surface of the side plate 1S of the upper runner 1 and the outer surface of the side plate 6S of the stud 6.

[0080] On the one hand, as shown in Fig. 8, the upper sheathing 31 is formed by a plurality of upper sheathing panels 32 arranged in a planar shape so as to form a wall shape. Each upper sheathing panel 32 is supported by the lower sheathing 21 (on the corresponding lower sheathing panel 22) with its back surface facing the surface side of the lower sheathing panel 22. In this example, each upper sheathing panel 32 is fixedly supported by the lower sheathing panel 22 by fastening its back surface to the surface of the lower sheathing panel 22 with an organic adhesive. Further, the back surface of the upper sheathing panel 32 is fixed to the surface of the lower sheathing panel 22 by using fixing members 33 such as staples and tapping screws in addition to the organic adhesive. The fixing members 33 are inserted from the surface side of the upper sheathing panel 32 toward the lower sheathing panel 22. Note that the fixing members 33 are set to a length that does not penetrate the lower sheathing panel 22.

[0081] When the present inventors fabricated the partition wall W using the runner 1 according to the above-described embodiment and conducted a vibration test, they confirmed that no rubbing noise occurred in the partition wall W. Here, in the runner 1 according to the present embodiment, the friction coefficient of the surface of the runner 1 is formed in a desired state, but the appearance is no different from that of the conventional one. Further, no special shape such as a notch is required for the panel material. And, for example, it is not a type that adjusts the friction coefficient of the surface with a tape or a wet lubricant, so there is no concern about dropping off or running out of oil. Therefore, when the runner 1 is incorporated into a structure such as a partition wall, it can suppress the rubbing noise that may occur in the structure such as a partition wall without increasing the work burden when fabricating the structure and the cost of the members around the runner, and without causing any concern about post-construction maintenance.

[0082] <Rubbing noise of partition wall> Hereinafter, a vibration test conducted on the partition wall W shown in Fig. 10 having the same structure as the partition wall W shown in Fig. 8 and the partition walls according to Comparative Examples 1 and 2 will be described. The partition wall W shown in Fig. 10 uses the runner 1 according to the embodiment, but strictly speaking, the details of how the panels are attached are different from those of the partition wall W shown in Fig. 8. However, for the sake of convenience of explanation, the partition wall W shown in Fig. 10 is also referred to with the same reference numeral "W" as the partition wall W shown in Fig. 8.

[0083] During the vibration excitation test, the partition wall W was a double-sided two-layer partition wall using a 21 mm thick gypsum board as the bottom-facing material 22 and a 9.5 mm thick gypsum board as the top-facing material 32. In the partition wall W, a plurality of bottom-facing materials 22 were combined and supported by the studs 6 so that the horizontal dimension was 2980 mm and the vertical dimension was 2680 mm, and a plurality of top-facing materials 32 were combined and supported by the bottom-facing materials 22. More specifically, as the bottom-facing material 22, a plurality of gypsum boards of multiple types of sizes were used to form a wall portion (bottom-facing 21) with a horizontal dimension of 2980 mm and a vertical dimension of 2680 mm. The specific dimensions of the gypsum boards of multiple types of sizes are shown in numbers (mm) in Fig. 10. The upper runner 1 used one with a distance of 40 mm from the base plate 1B to the tip of the side plate 1S, and the fixing member 23 closest to the upper runner 1 was provided at a position 50 mm away from the base plate 1B of the upper runner 1. Also, the distance from the base plate to the tip of the side plate of the lower runner 2 was also 40 mm, and the fixing member 23 closest to the lower runner 2 was provided at a position 50 mm away from the base plate of the lower runner 2. The other fixing members 23 were provided to satisfy general conditions.

[0084] On the other hand, the partition wall according to Comparative Example 1 differed from the partition wall W in that a runner with a general hot-dip galvanized layer formed thereon was used for the upper runner, but the other manufacturing conditions were the same as those of the partition wall W. On the other hand, the partition wall according to Comparative Example 2 used a runner with a general hot-dip galvanized layer formed thereon for the upper runner, and an adhesive tape (Dampron Tape NO375 manufactured by Nitto Denko Corporation) was attached to the surface of the runner side plate to suppress the rubbing noise between the runner and the facing material.

[0085] In addition, in the runner 1 according to the embodiment used for the partition wall W, the static friction coefficient specified by the first specific pattern is 0.20 and the dynamic friction coefficient is 0.13, the static friction coefficient specified by the second specific pattern is 0.19 and the dynamic friction coefficient is 0.16, and the static friction coefficient specified by the third specific pattern is 0.11 and the dynamic friction coefficient is 0.07.

[0086] In the runner used for the partition wall of Comparative Example 1, the static friction coefficient specified by the first specific pattern is 0.26 and the dynamic friction coefficient is 0.23, the static friction coefficient specified by the second specific pattern is 0.23 and the dynamic friction coefficient is 0.21, and the static friction coefficient specified by the third specific pattern is 0.19 and the dynamic friction coefficient is 0.14. In the adhesive tape on the side plate of the runner used for the partition wall of Comparative Example 2, the static friction coefficient specified by the first specific pattern is 0.38 and the dynamic friction coefficient is 0.35, the static friction coefficient specified by the second specific pattern is 0.40 and the dynamic friction coefficient is 0.38, and the static friction coefficient specified by the third specific pattern is 0.50 and the dynamic friction coefficient is 0.32.

[0087] FIG. 10 shows a vibration device that imparts vibration to the partition wall W. In the vibration device shown in FIG. 10, a rectangular frame member 102 for fixing the upper runner 1 and the lower runner 2 is provided. By fixing the upper runner 1 to the upper part of the frame member 102 and the lower runner 2 to the lower part of the frame member 102, the partition wall W is held in an upright state. Further, the vibration device is provided with a hydraulic jack 101 that contacts the upper part of the frame member 102 and applies a horizontal force to the upper runner 1 via the frame member 102. In the vibration test, a force is applied to the upper runner 1 via the frame member 102 by the hydraulic jack 101 to generate a reciprocating motion of about 2 mm, specifically, a displacement at an interlayer displacement angle of (1 / 1200) rad, thereby forming a behavior simulating the actual interlayer displacement. Then, the generation of rubbing noise during the test was verified by sensory evaluation. Further, the load of the hydraulic jack 101 when displacing the upper runner 1 was detected, and the load-displacement curve shown in FIG. 11 was specified. In the same procedure, vibration tests of the partition walls according to Comparative Examples 1 and 2 were also performed.

[0088] In the sensory evaluation regarding the generation of a frictional sound, the generation of a frictional sound was not confirmed in the partition wall W. Specifically, in the partition wall W, the generation of a frictional sound was not confirmed during the period in which the partition wall W was reciprocally displaced 1000 times by the hydraulic jack 101. On the other hand, in the partition wall according to Comparative Example 1, the generation of a frictional sound was confirmed immediately after the start of the vibration test. In Comparative Example 2, the generation of a frictional sound was not confirmed at the start of the vibration test, but the frictional sound was confirmed when the hydraulic jack 101 reciprocated about 200 times. The frictional sound in Comparative Example 2 is presumed to have occurred due to the adhesive tape being scraped off by friction.

[0089] In the results of the load-displacement curve shown in FIG. 11, Le shows the results in the partition wall W to which the runner 1 according to one embodiment is applied. Lc1 shows the results of Comparative Example 1, and Lc2 shows the results of Comparative Example 2. The maximum load detected in the test of the partition wall W was significantly smaller than that of Comparative Example 1 and Comparative Example 2. In particular, the maximum load detected in the test of the partition wall according to Comparative Example 1 was 3.4 KN, while the maximum load detected in the test of the partition wall W was 1.5 KN, which was significantly smaller. From this result, it is presumed that in the partition wall according to Comparative Example 1, a large resistance is generated when the runner and the facing material or the stud and the facing material rub against each other, and due to this, a frictional sound is generated in the partition wall of the comparative example.

[0090] As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and various changes may be made in the above-described embodiments. For example, studs 6 having a surface with the same coefficient of friction as the side plate 1S of the runner 1 may be formed. In this case, the entire surface of the stud 6 may be formed by a lubricating surface layer.

Description of Reference Numerals

[0091] 1... Runner (upper runner) 1B... Base plate 1S... Side plate 1M... Main body plate portion 1L1... First layer 1L2... Second layer 2… Runner (lower runner) 6… Stud 10… Wall member 21… Underlay 22… Underlay sheet material 23… Fixing member 31… Overlay 32… Overlay sheet material 33… Fixing member 50… Measuring device 51… Base part 52… Pedestal 53… Fixing part 54… Friction material 54-1… First friction material 54-1C… Contact surface 54-2… Second friction material 55… Friction jig unit 56… Hammer 58… Clamp part 59… Sphere 101… Hydraulic jack 102… Frame material U… Ceiling structure D… Floor structure W… Partition wall

Claims

Claim 1 A runner which is a building subfloor material comprising a base plate and side plates that bend from at least one of both ends of the base plate, wherein the static friction coefficient of at least one of two surfaces of the side plates facing each other in the thickness direction of the side plates is 0.20 or less when derived based on the following procedures (A1) to (A4). (A1) Install the side plate as an object for deriving the static friction coefficient along the installation surface of the pedestal and fix it to the pedestal. (A2) The contact surface of a friction material having a contact surface with a width of 10 mm and a shape in a cross section orthogonal to the width direction being an arc surface with a radius of curvature of 5 mm is brought into contact with the surface of the side plate through a base paper for gypsum board having a smoothness of 10 seconds or more and 20 seconds or less as measured according to JIS P 8155:2010, and a load of 0.2 kgf is applied to the side plate from the contact surface. (A3) While applying the load from the contact surface through the base paper for gypsum board, the friction material is relatively moved in one direction parallel to the installation surface at a speed of 0.17 mm / s, and the static frictional force Fs between the friction material and the side plate is specified. (A4) The static friction coefficient is derived by dividing the static frictional force Fs by a normal force of 0.2 kgf. Claim 2 When, in the procedure (A3), the dynamic frictional force Fd between the friction material and the side plate is specified within a predetermined movement range after the friction material has been moved 2 mm or more, and the dynamic friction coefficient is derived by dividing the dynamic frictional force Fd by a normal force of 0.2 kgf, the runner according to claim 1, wherein the dynamic friction coefficient of the surface of the side plate having a static friction coefficient of 0.20 or less is 0.13 or less. Claim 3 A runner which is a building subfloor material comprising a base plate and side plates that bend from at least one of both ends of the base plate, wherein the static friction coefficient of at least one of two surfaces of the side plates facing each other in the thickness direction of the side plates is 0.19 or less when derived based on the following procedures (B1) to (B4). (B1) Install the side plate as an object for deriving the static friction coefficient along the installation surface of the pedestal and fix it to the pedestal. The contact surface of the friction material having a contact surface with a width of 10 mm and an arc surface with a radius of curvature of 5 mm in a cross-section orthogonal to the width direction is brought into contact with the surface of the side plate through a base paper for gypsum board having a smoothness measured in accordance with JIS P 8155:2010 of 10 seconds or more and 20 seconds or less, and a load of 1.2 kgf is applied to the side plate from the contact surface. (B3)While applying the load from the contact surface through the base paper for gypsum board, the friction material is relatively moved in one direction parallel to the installation surface at a speed of 3.3 mm / s, and the static frictional force Fs between the friction material and the side plate is specified. (B4)The static friction coefficient is derived by dividing the static frictional force Fs by a normal force of 1.2 kgf.

4. When, in the procedure (B3), after moving the friction material by 2 mm or more, the dynamic frictional force Fd between the friction material and the side plate is specified within a predetermined movement range, and the dynamic friction coefficient is derived by dividing the dynamic frictional force Fd by a normal force of 1.2 kgf, the dynamic friction coefficient of the surface of the side plate where the static friction coefficient is 0.19 or less is 0.16 or less, the runner according to claim 3.

5. A runner which is a base material for a building comprising a base plate and side plates bent from at least one of both ends of the base plate, wherein the static friction coefficient of at least one of the two surfaces of the side plate facing each other in the thickness direction of the side plate is 0.11 or less when derived based on the following procedures (C1) to (C4). (C1)The side plate as an object for deriving the static friction coefficient is installed along the installation surface of the pedestal and fixed to the pedestal. (C2)The sphere of a friction material having a stainless steel sphere with a radius of 3 mm is brought into contact with the surface of the side plate, and a load of 0.2 kgf is applied to the side plate from the sphere. (C3)While applying the load from the sphere, the friction material is relatively moved in one direction parallel to the installation surface at a speed of 3.3 mm / s, and the static frictional force Fs between the friction material and the side plate is specified. (C4)The static friction coefficient is derived by dividing the static frictional force Fs by a normal force of 0.2 kgf.

6. When, in the procedure (C3), after moving the friction material by 2 mm or more, the dynamic frictional force Fd between the friction material and the side plate is specified within a predetermined movement range, and the dynamic friction coefficient is derived by dividing the dynamic frictional force Fd by a normal force of 0.2 kgf, The runner according to claim 5, wherein the coefficient of kinetic friction of the surface of the side plate, where the coefficient of static friction is 0.11 or less, is 0.07 or less.

7. The runner according to any one of claims 1 to 6, wherein the surface of the side plate is formed by a lubricating surface layer.

8. The runner according to claim 7, wherein the lubricating surface layer contains one or more of polyolefin, fluororesin, polyacetal, PEEK, PPS, polyamide, molybdenum disulfide, tungsten disulfide, graphite, and graphite fluoride.

9. The runner according to claim 7, wherein the lubricating surface layer is made of a lubricating resin.

10. The runner according to claim 7, wherein the lubricating surface layer forms the entire surface of the runner.

11. The coefficient of static friction is a value derived based on the frictional force measured by the multi-functional static and kinetic friction measuring machine TL201Tt manufactured by Trinity Lab Co., Ltd. as a device including the pedestal and the friction material, and the runner according to any one of claims 1 to 6.

12. A runner which is a building subgrade material including a base plate and a side plate bent from at least one of both ends of the base plate, A runner in which the entire surface of the runner is formed by a lubricating surface layer.

13. An upper runner supported by a ceiling structure of a building, A lower runner supported by a floor structure of the building and disposed below the upper runner, A stud supported between the upper runner and the lower runner and extending in the vertical direction, A wall member supported by the stud so as to face the upper runner, the lower runner, and the stud, A partition wall in which at least the upper runner uses the runner according to claim 1 or 12.

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