Mounting bracket for extruded cement board flooring and flooring mounting structure using same

Abstract

To provide a piece of mounting hardware capable of fastening an extruded cement board flooring to a beam material from a top while easily placing the extruded cement board flooring onto a beam material.SOLUTION: Mounting hardware includes: a flooring mounting bracket that is attached to an extruded cement board flooring; and a beam material mounting bracket that is attached to the beam material. The flooring mounting bracket includes: a locking member for locking to a locked part provided to a back side of the flooring; a plate-shaped part that extends from the locking member up to an end of the flooring; a clamping part that clamps the flange part of the beam material from one side in a width direction. The beam material mounting bracket includes: a main body part placed above the beam material; a clamping part that is connected to the main body part and clamps the flange part of the beam material from one side in the width direction; and a hollow portion holding part provided above the main body part. The hollow portion holding part includes: a pressing member that rotates between a placement state where the flooring is pressed against the beam material and a retracted state from the hollow part of flooring; and an anti-rotation member that locks the pressing member in a retracted state where the pressing member is rotated to be parallel to an edge of the flooring.SELECTED DRAWING: Figure 26

Description

[Technical field]

[0001] The present invention relates to a mounting bracket for extruded cement board flooring used for residential floors and the like, and a flooring mounting structure using the same. [Background technology]

[0002] Conventionally, extruded cement board flooring has been used as flooring for steel-framed apartment buildings. Such flooring is placed on beams, which are structural members of the house, and fastened to the beams with metal fittings. One method of fastening the extruded cement board flooring to the beams is to fasten the extruded cement board flooring placed on the beams with fastening metal fittings from the floor below. However, in this case, the construction of the extruded cement board flooring and the installation of the metal fittings must be done from the floor below, which reduces workability. Moreover, when working from the floor below, the worker must look up, which is a heavy workload, and they must climb and climb ladders, which reduces work efficiency.

[0003] Therefore, there is a prior art that allows extruded cement board flooring to be installed on the construction floor. For example, there is a mounting fixture that uses a flexible member to attach a Z-shaped clip material to the back surface of an extruded cement board flooring, and clamps the extruded cement board flooring to a beam using this Z-shaped clip material (see, for example, Patent Document 1). With this fixture, after the extruded cement board flooring is placed on the beam, the tip of the Z-shaped clip material attached to the back surface of the extruded cement board flooring from above the extruded cement board flooring is rotated toward the back surface of the extruded cement board flooring, thereby clamping the beam between the extruded cement board flooring and the Z-shaped clip material.

[0004] Another prior art technique involves fixing metal fittings to the widthwise center of a beam, inserting fastening hardware into the hollow spaces of extruded cement board flooring placed on the left and right of the metal fittings, and pressing the extruded cement board flooring from above against the beam with the fastening hardware to fasten it there (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2005-264438 A [Patent Document 2] Japanese Patent Application Publication No. 8-53892 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned Patent Document 1, the Z-shaped clip material needs to be fixed to the back surface of the extruded cement board floor material, which may require a lot of time and effort to install the Z-shaped clip material in the correct position facing upwards from the floor below.

[0007] In addition, in the above-mentioned Patent Document 2, it can be difficult to maintain the position of the fastening hardware properly when placing the extruded cement board flooring on the beam, and the task of placing the extruded cement board flooring on the beam can take a lot of time and effort.

[0008] Therefore, the present invention aims to provide a mounting bracket that makes it easy to place an extruded cement board flooring material on a beam and fastens the extruded cement board flooring material to a beam from above, and a flooring mounting structure using the same. [Means for solving the problem]

[0009] In order to achieve the above object, the mounting bracket of the present invention is a mounting bracket for fastening an extruded cement board flooring material having a hollow portion to a beam material, and comprises a floor material mounting bracket attached to the extruded cement board flooring material, and a beam mounting bracket attached to the beam material, the floor material mounting bracket having a locking member that locks into a locked portion provided on the back side of the extruded cement board flooring material, a plate-shaped portion extending from the locking member to the end of the extruded cement board flooring material, and a clamping portion that clamps a flange portion of the beam material from one side in the width direction, and the beam mounting bracket is disposed above the beam material. The extruded cement board flooring system has a main body portion to be placed on the beam material, a clamping portion connected to the main body portion and clamping the flange portion of the beam material from one side in the width direction, and a hollow portion holding portion provided above the main body portion, and the hollow portion holding portion has a pressing member that rotates around a rotation axis in an arrangement state in which it is inserted into the hollow portion of the extruded cement board flooring material to press the extruded cement board flooring material against the beam material, and a retracted state in which it has come out of the hollow portion of the extruded cement board flooring material, and a rotation prevention member that engages in the retracted state in which the pressing member has rotated so that it is parallel to the edge of the extruded cement board flooring material.

[0010] With this configuration, the locking member of the flooring mounting bracket attached to the beam with its clamping portion is locked to the locked portion of the extruded cement board flooring, and the pressing member of the beam mounting bracket attached to the flange of the beam with its clamping portion presses the extruded cement board flooring against the beam to fasten it. Moreover, the flooring mounting bracket can be easily attached by simply clamping the clamping portion to the flange of the beam and locking the locking member to the locked portion provided on the back side of the extruded cement board flooring. Furthermore, with the beam mounting bracket already attached to the beam, the locked portion of the extruded cement board flooring can be locked to the locking member of the flooring mounting bracket, allowing the extruded cement board flooring to be positioned, improving workability.

[0011] The anti-rotation member may also be configured to be engaged even in the position in which the pressing member is rotated in the direction in which the hollow portion of the extruded cement board flooring material extends.

[0012] With this configuration, the rotation prevention member can lock the pressing member in the retracted state, and can also lock the pressing member in the rotated state where the flooring mounting bracket is pressed against the flooring mounting bracket, making the installation work of the extruded cement board flooring efficient.

[0013] The main body may further include a hook portion that hooks onto the other end in the width direction of the flange portion that is clamped by the clamping portion.

[0014] With this configuration, both widthwise ends of the flange portion of the beam are held horizontally by the clamping portion and the hook portion, thereby making it possible to increase the holding force that holds the beam mounting bracket to the beam.

[0015] The main body may also include a step portion that forms a gap between the main body and an upper surface of the beam.

[0016] With this construction, a gap is formed between the part that holds the extruded cement board flooring and the beams by the step of the main body, which provides a cushioning effect that prevents the vibrations of the extruded cement board flooring from being transmitted from the beam mounting bracket to the beams. This reduces the vibrations transmitted to the beams, improving sound insulation.

[0017] In addition, the hanging portion may have an inclined portion extending diagonally downward from the main body portion, a horizontal portion continuing from the inclined portion and contacting the flange portion horizontally, and an end holding portion continuing from the horizontal portion and holding an end of the flange portion.

[0018] With this configuration, the end of the flange can be held by the end holding portion which is continuous with the horizontal portion of the hanging portion, and the inclined portion creates a gap between it and the beam, thereby providing cushioning properties which prevent vibrations from the extruded cement board flooring material from being transmitted from the hanging portion to the beam.

[0019] The hook portion may further have a folded portion folded upward at the center of the end holding portion.

[0020] With this configuration, if a force is applied to the hook-retaining portion in a direction that causes it to come loose, the folded portion will deform upward and interfere with the flange portion and the floor material, making it difficult for the end retaining portion to come off the flange portion and thus preventing the beam mounting bracket from coming loose.

[0021] The clamping portion may further have an engaging portion that engages with an engaged portion provided on the beam. In this specification and claims, the "engaged portion" includes a recess, a protrusion, a through hole, etc. The "engaging portion" includes a protrusion, an uneven portion, a through hole, etc. that engages with the engaged portion.

[0022] With this configuration, if the beam material has an engaged portion such as a recess, protrusion, or through hole, the holding force that holds the mounting bracket to the beam material can be further strengthened by engaging the engaging portion provided on the clamping portion with the engaged portion of the beam material.

[0023] On the other hand, the mounting structure for extruded cement board flooring of the present invention is a mounting structure in which the extruded cement board flooring having the hollow portion is fastened to the beam material by the mounting bracket, and the floor mounting bracket is attached by clamping the flange portion of the beam material from one side in the width direction with the clamping portion and engaging the locking member with the locked portion of the extruded cement board flooring, and the beam mounting bracket is attached by clamping the flange portion of the beam material from one side in the width direction with the clamping portion, and the extruded cement board flooring is pressed against the beam material in the above-mentioned arrangement in which the pressing member is rotated to insert the pressing member into the hollow portion.

[0024] With this configuration, the locking member of the flooring mounting bracket attached to the beam with its clamping part is locked to the locked part of the extruded cement board flooring, and the pressing member of the beam mounting bracket attached to the flange part of the beam with its clamping part presses the extruded cement board flooring against the beam to fasten it in place. Moreover, with the beam mounting bracket already attached to the beam, the engaged part of the extruded cement board flooring can be engaged with the engaging part of the flooring mounting bracket, allowing the extruded cement board flooring to be aligned, improving ease of construction when placing the extruded cement board flooring. Effect of the Invention

[0025] According to the present invention, it is easy to place an extruded cement board flooring on a beam while keeping the beam mounting bracket properly attached to the beam. The work of fastening the extruded cement board flooring to the beam with the mounting bracket can be efficiently performed from above. This makes it possible to improve the workability of fastening the extruded cement board flooring.

[0026] Furthermore, since the extrusion molded cement board flooring can be firmly attached to the beams by the beam mounting brackets and the floor pressing brackets, it is possible to improve the fastening reliability of the extrusion molded cement board flooring. Also, the structure of the mounting brackets can be designed to improve sound insulation performance. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is a drawing showing a first mounting fitting of a reference example, where (A) is an exploded perspective view, and (B) is a perspective view showing the rear side of the floor material pressing fitting. [Diagram 2] FIG. 2 is a diagram showing the first mounting fitting shown in FIG. 1 in use when attached to a beam material, where (A) is a plan view and (B) is a cross-sectional side view. [Diagram 3] FIG. 3 is a perspective view showing a mounting structure in which an extruded cement board floor material is fastened to a beam material by the first mounting bracket shown in FIG. [Figure 4] FIG. 4 is a perspective view showing a modified example of the beam material mounting bracket in the first mounting bracket shown in FIG. [Diagram 5] FIG. 5 is a cross-sectional side view of the beam mounting bracket shown in FIG. 4 in use attached to a beam. [Figure 6] FIG. 6 is a drawing of a floor material pressing fitting showing a modified example of the floor material pressing fitting in the first mounting fitting shown in FIG. 1, where (A) is a perspective view of the front side and (B) is a perspective view of the back side. [Figure 7] FIG. 7 is a cross-sectional side view of the first mounting bracket using the flooring pressing bracket shown in FIG. 6 when attached to a beam. [Figure 8] FIG. 8 is a perspective view showing a beam material mounting bracket of a second mounting bracket of a reference example. [Figure 9] FIG. 9 is a cross-sectional side view of a second mounting bracket having the beam mounting bracket shown in FIG. 8 in use attached to a beam. [Figure 10] FIG. 10 is a perspective view showing a mounting structure in which an extruded cement board floor material is fastened to a beam material using the second mounting bracket shown in FIG. [Figure 11] FIG. 11 is a drawing showing a third mounting fitting of a reference example, where (A) is an exploded perspective view, and (B) is a perspective view showing the rear side of the floor material pressing fitting. [Figure 12] FIG. 12 is a diagram showing the third mounting bracket shown in FIG. 11 in use when attached to a beam, where (A) is a plan view and (B) is a cross-sectional side view. [Figure 13] FIG. 13 is a perspective view showing a mounting structure in which an extruded cement board floor material is fastened to a beam material using the third mounting bracket shown in FIG. [Figure 14] FIG. 14 is a drawing of a floor material pressing fitting showing a modified example of the floor material pressing fitting in the third mounting fitting shown in FIG. 11, where (A) is a perspective view of the front side and (B) is a perspective view of the back side. [Figure 15] FIG. 15 is a diagram showing a state in which the third mounting bracket using the floor pressing bracket shown in FIG. 14 is attached to a beam, where (A) is a plan view and (B) is a cross-sectional side view. [Figure 16] FIG. 16 is a perspective view showing a floor material pressing fitting of a fourth mounting fitting according to the reference example. [Figure 17]FIG. 17 is a cross-sectional side view of the fourth mounting bracket, which uses the flooring pressure bracket shown in FIG. 16, in use when attached to a beam. [Figure 18] FIG. 18 is an exploded perspective view showing the fifth mounting fitting of the reference example. [Figure 19] FIG. 19 is a diagram showing the fifth mounting bracket shown in FIG. 18 in use attached to a beam material, where (A) is a plan view and (B) is a cross-sectional side view. [Figure 20] FIG. 20 is a perspective view showing a mounting structure in which an extruded cement board floor material is fastened to a beam material using the fifth mounting bracket shown in FIG. [Figure 21] FIG. 21 shows a sixth mounting bracket of a reference example, where (A) is an exploded perspective view, and (B) is a perspective view showing a beam mounting bracket different from (A). [Figure 22] FIG. 22 is an exploded perspective view showing the seventh mounting fitting of the reference example. [Diagram 23] Figure 23 is a drawing showing the seventh mounting bracket shown in Figure 22 attached to a beam material in use, where (A) is a cross-sectional view taken along the arrows XXIII-XXIII shown in (B), and (B) is a cross-sectional view taken from the side. [Figure 24] FIG. 24 is an exploded perspective view showing the eighth mounting fitting of the reference example. [Diagram 25] FIG. 25 is a perspective view showing a mounting structure in which the eighth mounting fitting shown in FIG. 24 is mounted on a beam material. [Figure 26] FIG. 26 is an exploded perspective view showing the ninth mounting fitting according to the present invention. [Figure 27] FIG. 27 is a plan view of the state in which beam material mounting bracket 165 and hollow portion holding portion 168 of the ninth mounting bracket shown in FIG. 26 are assembled. [Figure 28] Figure 28 is a drawing showing the use of the ninth mounting bracket shown in Figure 26 attached to a beam material, where (A) is a cross-sectional view taken along the arrows XXVIII-XXVIII shown in (B), and (B) is a cross-sectional view taken from the side. [Figure 29] FIG. 29 is a perspective view showing a mounting structure in which the ninth mounting bracket shown in FIG. 26 is mounted on a beam material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] An embodiment of the present invention will be described below with reference to the drawings. In the following embodiment, a part of the extruded cement board flooring material 1 on a construction floor will be illustrated and described. In this specification and claims, as shown in FIG. 3, the extension direction of the beam material 5 is the front-rear direction, and the extension direction of the extruded cement board flooring material 1 is the left-right direction (width direction). The upper surface of the extruded cement board flooring material 1 is also called the "front surface" and the lower surface is also called the "rear surface". Furthermore, the partition wall that separates the hollow portion 2 between the upper surface side substrate 1b and the lower surface side substrate 1c of the extruded cement board flooring material 1 is called the "crosspiece portion 1a".

[0029] (First mounting bracket in reference example) 1 is a drawing showing a first mounting bracket 10 of a reference example, where (A) is an exploded perspective view and (B) is a perspective view showing the back side of a floor material pressing bracket 11. The first mounting bracket 10 comprises a floor material pressing bracket 11 that presses the underside base material 1c (FIG. 2) of the extruded cement board floor material 1 against a beam 5 (FIG. 2), and a beam mounting bracket 15 that is attached to the beam 5.

[0030] The flooring pressing fitting 11 is made of a rectangular plate material and has a through hole 12 in the center through which a bolt material 18 serving as a retaining member provided on the beam mounting fitting 15 is inserted. Additionally, upward protrusions 13 are provided on both sides of the through hole 12 in the longitudinal direction of the flooring pressing fitting 11. Providing the protrusions 13 on the plate-shaped flooring pressing fitting 11 improves bending strength. The underside of the flooring pressing fitting 11 in this example serves as a pressing part that presses the underside base material 1c (Fig. 2) of the extruded cement board flooring 1.

[0031] The beam mounting bracket 15 has a planar main body portion 16 arranged above the beam 5, a clamping portion 17 that clamps the flange portion 6 (FIG. 2) of the beam 5 from one side in the width direction between the main body portion 16 and the clamping portion 17, a bolt material 18 serving as a retaining portion provided above the main body portion 16, and a nut material 19 that is screwed into the bolt material 18. The clamping portion 17 is formed by bending downward a predetermined position extending on one side of the main body portion 16 made of a plate material, and bending the end portion to a predetermined position so as to extend downward on the main body portion 16. The clamping portion 17 is formed so as to clamp the flange portion 6 (FIG. 2) of the beam 5 from one side in the width direction.

[0032] The beam mounting bracket 15 is also provided with a hook portion 20 extending in the opposite direction to the clamping portion 17 extending in one of the left and right directions. The hook portion 20 is formed so that it can be hung on the other end of the flange portion 6 in the width direction while the clamping portion 17 clamps the flange portion 6 from one side in the width direction. The hook portion 20 has a support portion 20a connected to the upper surface of the main body portion 16, an inclined portion 20b extending obliquely downward from the support portion 20a, a horizontal portion 20c that is continuous with the inclined portion 20b and horizontally contacts the flange portion 6 (FIG. 2), and an end holding portion 20d that is continuous with the horizontal portion 20c and is hung on the end of the flange portion 6. The end holding portion 20d is formed by bending the end of the plate material downward. The end holding portion 20d is formed so as to be bent with respect to the horizontal portion 20c at an angle θ in the range of 30° to 90°. If the angle θ at which the end holder 20d is bent is greater than 90°, there is no effect of latching onto the flange 6, whereas if it is less than 30°, the end of the flange 6 is not sufficiently latched onto, reducing the latching effect.

[0033] In this example, the center of the end retaining portion 20d is provided with a folded portion 20e that is folded upward. By providing the folded portion 20e, when a force is applied in the direction in which the beam mounting bracket 15 comes off, the folded portion 20e deforms upward and interferes between the flange portion 6 and the extruded cement board floor material 1, making it difficult for the end retaining portion 20d to come off the flange portion and the beam mounting bracket 15 to come off. The support portion 20a of the latch portion 20 is connected (fixed) to the main body portion 16 by welding or the like.

[0034] The beam mounting bracket 15 can hold both ends of the flange portion 6 of the beam 5 horizontally with the clamping portion 17 and the hook portion 20, so that the beam mounting bracket 15 can be firmly held by the beam 5.

[0035] Furthermore, the first mounting bracket 10 is provided with a step 16a so that the central portion of the main body 16 is separated upward from the beam 5. The step 16a is formed by bending the main body 16 upward. By providing the step 16a, a gap V (FIG. 2(B)) is formed between the main body 16 and the beam 5, as described below. By forming the gap V, it is possible to exhibit a buffering characteristic that suppresses the vibration of the extruded cement board floor material 1 from the first mounting bracket 10 to the beam 5. In other words, the step 16a can provide a buffering characteristic against vibration propagation, so that the vibration transmitted from the first mounting bracket 10 to the beam 5 can be suppressed. The configuration of the step 16a is not limited, and it is sufficient if the configuration allows the gap V to be formed between the main body 16 and the beam 5.

[0036] (Example of using the first mounting bracket) FIG. 2 is a diagram showing the first mounting bracket 10 shown in FIG. 1 in use when attached to a beam 5, (A) being a plan view, and (B) being a cross-sectional view from the side. In this example, the extruded cement board flooring 1 has a notch 1d at the end of the upper substrate 1b at the position of the hollow portion 2 where the first mounting bracket 10 is fastened to the beam 5. The flooring pressing bracket 11 of the first mounting bracket 10 may be attached by fitting it between the joints of the adjacent extruded cement board flooring 1, but as in this embodiment, by providing a minimum notch 1d in advance in the upper substrate 1b of the extruded cement board flooring 1, it becomes easier to attach the flooring pressing bracket 11. In addition, when the extruded cement board flooring 1 is adjacent to each other, the notch 1d may be provided at the end of each of the extruded cement board flooring 1 facing each other, or may be provided only on one of them. The notch 1d may be of any size as long as the flooring pressing bracket 11 can be inserted.

[0037] When the extruded cement board flooring 1 is fastened to the beam 5 with the first mounting bracket 10, the beam mounting bracket 15 is inserted so that the clamping portion 17 clamps the flange portion 6 of the beam 5 from one side in the width direction, and the end holding portion 20d of the hook portion 20 is hooked onto the other end of the flange portion 6 in the width direction and attached to a predetermined position on the beam 5. In this state, the beam mounting bracket 15 holds the flange portion 6 horizontally by the clamping portion 17 and the end holding portion 20d, so it is held with a strong holding force.

[0038] The extruded cement board flooring 1 is then placed on the beam 5, sandwiched between the bolt material 18 provided on the main body 16 of the beam mounting bracket 15. The beam mounting bracket 15 is attached to the beam 5 with strong holding force, so the extruded cement board flooring 1 can be easily placed on the beam 5. The floor pressing bracket 11 is then inserted into the bolt material 18 through the through hole 12. The nut material 19 is then screwed into the bolt material 18 and tightened, so that the lower surface base material 1c of the extruded cement board flooring 1 is pressed against the beam 5 by the floor pressing bracket 11 and held in place. This allows adjacent extruded cement board floorings 1 to be fastened to the beam 5.

[0039] The number of parts in the first mounting bracket 10 can also be reduced. Furthermore, the extruded cement board flooring 1 can be fastened to the beam 5 from above on the construction floor by working downwards, improving workability. Moreover, the gap V provides a cushioning effect that suppresses the transmission of vibration from the extruded cement board flooring 1 to the beam 5. This suppresses the vibration transmitted to the beam 5, improving sound insulation.

[0040] Furthermore, the first mounting bracket 10 can simultaneously press and fasten adjacent extruded cement board floor materials 1 placed on the left and right sides of the beam 5 with one floor material pressing bracket 11. Therefore, the fastening work of adjacent extruded cement board floor materials 1 can be carried out in one place, and the fastening work of the extruded cement board floor materials 1 can be carried out efficiently.

[0041] (Example of mounting structure using the first mounting bracket) FIG. 3 is a perspective view showing a mounting structure in which the extruded cement board flooring 1 is fastened to the beam 5 by the first mounting bracket 10 shown in FIG. 1. The first mounting bracket 10 is mounted so that the beam mounting bracket 15 clamps the flange 6 of the beam 5 from one side in the width direction with the clamping portion 17, and the end holding portion 20d of the hook portion 20 is hung on the other end of the flange 6 in the width direction (FIG. 2). After the beam mounting bracket 15 is attached, the extruded cement board flooring 1 is placed on the beam 5 so that it is adjacent to the bolt material 18 of the beam mounting bracket 15 (only one of the extruded cement board flooring 1 is shown in the figure). The end of the upper surface side base material 1b of the extruded cement board flooring 1 is cut off and the cutout portion 1d (FIG. 2(A)) is placed at the position of the bolt material 18.

[0042] Then, the floor material pressing fitting 11 is inserted through the bolt material 18 from the through hole 12 and attached so as to hang on the underside base material 1c of the adjacent extruded cement board floor material 1 (Fig. 2). After that, the nut material 19 is screwed onto the bolt material 18 and tightened, so that the floor material pressing fitting 11 can press the extruded cement board floor material 1 against the beam material 5 and fasten it.

[0043] (Modification of the beam mounting bracket in the first mounting bracket) Fig. 4 is a perspective view showing a modified example of the beam mounting bracket 15 in the first mounting bracket 10 shown in Fig. 1. Fig. 5 is a cross-sectional side view of the beam mounting bracket 15 shown in Fig. 4 attached to a beam 5 in use. The beam mounting bracket 15 of this example is an example in which the configuration of the hook portion 21 is different from that of the beam mounting bracket 15 shown in Fig. 1. The main body portion 16 other than the hook portion 21, the clamping portion 17, the bolt material 18 serving as the retaining portion, and the nut material 19 screwed into the bolt material 18 are the same as those of the beam mounting bracket 15 shown in Fig. 1. The same components are given the same reference numerals and their explanation will be omitted.

[0044] 4, the hook portion 21 in this example has an inclined portion 21b extending obliquely downward from a support portion 21a located on the upper surface of the main body portion 16, and a horizontal portion 21c that is continuous with the inclined portion 21b and horizontally contacts the flange portion 6 (FIG. 5) and is provided so as to protrude from the end of the flange portion 6. An end holding portion 21d that is bent downward so as to engage with the flange portion 6 is provided at part of the center portion of the horizontal portion 21c.

[0045] As shown in Fig. 5, a beam mounting bracket 15 equipped with such a hook portion 21 is inserted so as to clamp the flange portion 6 of the beam 5 from one side in the width direction with the clamping portion 17, and the end holding portion 21d of the hook portion 21 is hooked onto the other end portion in the width direction of the flange portion 6 and attached to a predetermined position of the beam 5. Even in this example, the beam mounting bracket 15 can hold both ends of the flange portion 6 of the beam 5 in the horizontal direction with the clamping portion 17 and the hook portion 21, so that the beam mounting bracket 15 can be firmly held by the beam 5. Note that since the other configuration is the same as in Fig. 2, the same configuration is given the same reference numerals and detailed description will be omitted.

[0046] (Modification of the floor pressing metal fitting in the first mounting metal fitting) Fig. 6 is a drawing of a floor material pressing fitting 25 showing a modified example of the floor material pressing fitting 11 in the first mounting fitting 10 shown in Fig. 1, (A) being a perspective view of the front side and (B) being a perspective view of the back side. Fig. 7 is a cross-sectional view as seen from the side in a state in which the first mounting fitting 10 using the floor material pressing fitting 25 shown in Fig. 6 is attached to a beam 5. Note that the same components as those in the beam mounting fitting 15 shown in Fig. 1 are given the same reference numerals and their explanation will be omitted.

[0047] As shown in Figures 6(A) and (B), the floor material pressing fitting 25 is made of a rectangular plate material, and has a through hole 26 in the center, through which the bolt material 18 provided on the beam mounting fitting 15 is inserted. In addition, upward protrusions 27 are provided on both sides of the through hole 26 in the longitudinal direction of the floor material pressing fitting 25. Providing the protrusions 27 on the plate-shaped floor material pressing fitting 25 improves bending strength. Furthermore, protruding pressing parts 28 that protrude toward the back surface side are provided at the four corners of the rectangular shape. The protruding pressing parts 28 are formed by bending the corners of the floor material pressing fitting 25 toward the back surface.

[0048] As shown in FIG. 7, with this floor pressing metal fitting 25, the extruded cement board flooring 1 is placed on the beam 5 so that the lower side substrates 1c are adjacent to each other across the bolt material 18 of the beam mounting metal fitting 15 attached to the beam 5. Then, the floor pressing metal fitting 25 is inserted into the bolt material 18 through the through hole 26. The floor pressing metal fitting 25 is in a state where the protruding pressing portion 28 on the back side is in contact with the lower side substrate 1c of the adjacent extruded cement board flooring 1. Then, the nut material 19 is screwed into the bolt material 18 and tightened, so that the protruding pressing portion 28 is pressed in a state of being engaged with the lower side substrate 1c of the extruded cement board flooring 1. As a result, the protruding pressing portion 28 of the floor pressing metal fitting 25 is engaged with the lower side substrate 1c, and the adjacent extruded cement board flooring 1 can be more firmly fixed to the beam 5.

[0049] (Second mounting bracket in reference example) 8 is a perspective view showing a beam mounting bracket 35 of a second mounting bracket 30 of a reference example. Note that components identical to those of the first mounting bracket 10 are given reference numerals with the addition of "20" and their explanation will be omitted. Also, since the floor material pressing bracket in the second mounting bracket 30 can be the floor material pressing bracket 11 or floor material pressing bracket 25 of the first mounting bracket 10 or other floor material pressing brackets, only the beam mounting bracket 35 of the second mounting bracket 30 will be explained.

[0050] The second mounting bracket 30 is used when an engaged portion 7 (FIG. 10) such as a through hole is provided in the flange portion 6 of the beam 5. The engaged portion 7 includes a through hole as well as a concave portion, a convex portion, etc. The beam mounting bracket 35 of the second mounting bracket 30 has a planar main body portion 36 arranged above the beam 5, a clamping portion 37 that clamps the flange portion 6 (FIG. 9) of the beam 5 from one side between the main body portion 36 and the clamping portion 37, and a hook portion 40 that hooks onto the other end of the flange portion 6 in the width direction clamped by the clamping portion 37. A bolt material 38 that serves as a retaining portion extending upward is provided in the main body portion 36.

[0051] The main body 36 is provided at the clamping portion 37 with an engagement portion 41 for engaging with the engaged portion 7 provided on the flange portion 6 of the beam 5. The engagement portion 41 includes a convex portion, a concave-convex portion, a through hole, etc. for engaging with the engaged portion 7.

[0052] (Example of using the second mounting bracket) Fig. 9 is a cross-sectional side view of the second mounting bracket 30 having the beam mounting bracket 35 shown in Fig. 8 attached to a beam 5 in use. The beam mounting bracket 35 has the same configuration as the beam mounting bracket 15 of the first mounting bracket 10 according to the first embodiment, so identical configurations are given reference numerals with the addition of "20" and descriptions thereof will be omitted.

[0053] The beam mounting bracket 35 of the second mounting bracket 30 is inserted so that the clamping portion 37 clamps the flange portion 6 of the beam 5 from one side in the width direction, and the end holding portion 40d of the hook portion 40 is hooked onto the other end portion in the width direction of the flange portion 6 and attached to a predetermined position of the beam 5. With this beam mounting bracket 35, the flange portion 6 of the beam 5 is clamped by the clamping portion 37, so that the engaging portion 41 engages with the engaged portion 7 of the flange portion 6.

[0054] Then, the extruded cement board flooring 1 is placed so that the crosspieces 1a are adjacent to each other across the bolt material 38 provided on the main body 36 of the beam mounting bracket 35. The extruded cement board flooring 1 is placed on the buffer material 4 placed on the beam 5.

[0055] Then, the floor material pressing fitting 31 is inserted through the through hole 32 into the bolt material 38 provided on the main body 36, and is attached so as to hang on the underside base material 1c of the adjacent extruded cement board floor material 1. After that, the nut material 39 is screwed into the bolt material 38 and tightened, so that the floor material pressing fitting 31 presses the underside base material 1c of the extruded cement board floor material 1 towards the beam material 5. This allows the adjacent extruded cement board floor materials 1 to be fastened to the beam material 5.

[0056] Furthermore, with this beam mounting bracket 35, the engaging portion 41 provided on the clamping portion 37 can be engaged with the engaged portion 7 provided on the flange portion 6 of the beam 5, thereby further strengthening the holding force that holds the second mounting bracket 30 to the beam 5.

[0057] (Example of mounting structure using the second mounting bracket) Figure 10 is a perspective view showing a mounting structure in which an extruded cement board floor material 1 is fastened to a beam 5 with the second mounting bracket 30 shown in Figure 9. The beam 5 in this example has engaged portions 7 (through holes in this example) at predetermined intervals in the front-rear direction of the flange portion 6.

[0058] The beam mounting bracket 35 of the second mounting bracket 30 is inserted so as to clamp the flange portion 6 of the beam 5 from one side in the width direction with the clamping portion 37, so that the engaging portion 41 engages with the engaged portion 7, and the end holding portion 40d of the hook portion 40 is hung on the other end of the flange portion 6 in the width direction and attached to the beam 5 at a predetermined position (Fig. 9). After the beam mounting bracket 35 is installed, the extruded cement board flooring 1 is placed on the beam 5 so as to be adjacent to each other with the bolt material 38 of the beam mounting bracket 35 in between (only one of the extruded cement board flooring materials 1 is shown in the figure). The extruded cement board flooring 1 is placed so that the cutout portion 1d (Fig. 9) where the end of the upper surface side base material 1b has been cut out is located at the position of the bolt material 38.

[0059] Then, the floor material pressing fitting 31 is inserted into the bolt material 38 through the through hole 32. This brings the floor material pressing fitting 31 into contact with the underside base material 1c of the adjacent extruded cement board floor material 1. After that, the nut material 39 is screwed into the bolt material 38 and tightened, so that the floor material pressing fitting 31 can press the extruded cement board floor material 1 against the beam material 5 and fasten it.

[0060] (Reference example 3rd mounting bracket) Figure 11 shows a third mounting bracket 50 of a reference example, where (A) is an exploded perspective view and (B) is a perspective view showing the back side of a floor material pressing bracket 51. The third mounting bracket 50 is used when a through hole 8 serving as an interlocking portion is provided in the underside base material 1c of the extruded cement board floor material 1 (Figure 12). The third mounting bracket 50 can be used when fastening the extruded cement board floor material 1 to one side of a beam 5 at the end of a construction floor (Figure 12).

[0061] The third mounting bracket 50 comprises a floor pressing bracket 51 that presses the underside base material 1c (Fig. 12) of the extruded cement board flooring 1 towards the beam 5 (Fig. 12), and a beam mounting bracket 55 that is attached to the beam 5. The beam mounting bracket 55 has the same configuration as the beam mounting bracket 15 of the first mounting bracket 10 according to the first embodiment, so the same components are given reference numbers with the suffix "40" and their explanation will be omitted.

[0062] The floor pressing metal fitting 51 of the third mounting metal fitting 50 has a pin 52 as a locking member that is locked into a through hole 8 (FIG. 12) provided in the lower surface side base material 1c of the extruded cement board flooring 1, a plate-shaped part 53 that extends from the pin 52 toward the end of the extruded cement board flooring 1, and a support part 54 that is bent downward at the end of the plate-shaped part 53. The pin 52 is provided so as to protrude downward at a predetermined position of the plate-shaped part 53 (the position of the through hole 8 as the locked part provided in the extruded cement board flooring 1). The pin 52 is fixed to the plate-shaped part 53 by welding, screwing, or other methods. The method of fixing the pin 52 is not limited. A through hole 53a is provided at a position close to the support part 54 of the plate-shaped part 53, through which a bolt material 58 provided in the beam mounting metal fitting 55 is inserted. A recess 54a is provided in the center part of the support part 54 in the direction of the through hole 53a. Furthermore, upward protrusions 53b are provided on both sides of the through hole 53a in the longitudinal direction of the plate-shaped portion 53. By providing the plate-shaped portion 53 with the protrusions 53b, the bending strength of the flooring material pressing fitting 51 is improved.

[0063] (Example of using the third mounting bracket) 12 is a diagram showing the third mounting bracket 50 shown in FIG. 11 attached to a beam 5, (A) being a plan view and (B) being a cross-sectional view from the side. The extrusion-molded cement board floor material 1 of this embodiment also has a notch 1d at the end of the upper surface base material 1b of the portion fastened to the beam 5 by the third mounting bracket 50.

[0064] When the extruded cement board flooring 1 is attached to the beam 5 by the third mounting bracket 50, the beam mounting bracket 55 is inserted so as to clamp the flange 6 of the beam 5 from one side in the width direction with the clamping portion 57, and the end holding portion 60d of the hook portion 60 is hung on the other end of the flange 6 in the width direction and attached to the beam 5 at a predetermined position. Then, the extruded cement board flooring 1 is placed on the beam 5 so as to be close to the bolt material 58 provided on the main body portion 56 of the beam mounting bracket 55. Then, the floor material pressing bracket 51 is inserted into the hollow portion 2 of the extruded cement board flooring 1, the pin 52 is inserted into the through hole 8 and locked, and the through hole 53a is inserted into the bolt material 58. Then, the nut material 59 is screwed into the bolt material 58 and tightened, so that the lower surface side base material 1c of the extruded cement board flooring 1 is pressed toward the beam 5 by the floor material pressing bracket 51 with the support portion 54 aligned with the bolt material 58. This allows the extruded cement board floor material 1 to be fastened to the beam material 5.

[0065] In this way, by forming the floor material pressing fitting 51 in a shape having a flat plate-like portion 53 and a support portion 54 whose end is bent downward, even when the extruded cement board floor material 1 is placed on one side of the beam material 5 at the end of the construction floor, the recessed portion 54a comes into contact with the bolt material 58, so that the horizontal state of the floor material pressing fitting 51 can be maintained. Therefore, the extruded cement board floor material 1 can be pressed against the beam material 5 and fastened.

[0066] Furthermore, according to the third mounting bracket 50, the pin 52 of the floor material pressing bracket 51 is fastened in a locked state in the through hole 8 of the underside base material 1c, so that the extruded cement board floor material 1 can be firmly fastened while maintaining the position of the floor material pressing bracket 51.

[0067] Furthermore, the third mounting bracket 50 also reduces the number of parts. Moreover, the extruded cement board flooring material 1 can be fastened to the beam 5 by working downward from above on the construction floor, improving workability. Moreover, the gap V exhibits a buffering characteristic that suppresses the transmission of vibration from the extruded cement board flooring material 1 to the beam 5. Therefore, the vibration transmitted to the beam 5 can be suppressed, improving sound insulation.

[0068] (Example of mounting structure using the third mounting bracket) FIG. 13 is a perspective view showing a mounting structure in which the extruded cement board flooring 1 is fastened to the beam 5 by the third mounting bracket 50 shown in FIG. 11. The third mounting bracket 50 is attached to the beam 5 at a predetermined position by inserting the beam mounting bracket 55 so that the clamping portion 57 clamps the flange portion 6 of the beam 5 from one side in the width direction, and the end holding portion 60d of the hook portion 60 is hung on the other end of the flange portion 6 in the width direction (FIG. 12). After the beam mounting bracket 55 is attached, the extruded cement board flooring 1 is placed on the beam 5 so that it is close to the bolt material 58 of the beam mounting bracket 55. The extruded cement board flooring 1 is placed at the position of the bolt material 58 with the cutout portion 1d (FIG. 12(A)) where the end of the upper surface side base material 1b is cut out.

[0069] Then, the floor material pressing fitting 51 is inserted into the hollow portion 2 of the extruded cement board floor material 1, the pin 52 is inserted into the through hole 8, and the through hole 53a is inserted into the bolt material 58. After that, the nut material 59 is screwed into the bolt material 58 and tightened, so that the extruded cement board floor material 1 can be pressed against the beam material 5 by the floor material pressing fitting 51 and fastened.

[0070] (Modification of the flooring mounting bracket in the third mounting bracket) Fig. 14 is a drawing of a floor material pressing fitting 65 showing a modified example of the floor material pressing fitting 51 in the third mounting fitting 50 shown in Fig. 11, where (A) is a perspective view from the front side and (B) is a perspective view from the back side. Fig. 15 is a drawing of the third mounting fitting 50 using the floor material pressing fitting 65 shown in Fig. 14 attached to a beam 5 in use, where (A) is a plan view and (B) is a cross-sectional view from the side. Note that since the third mounting fitting 50 and the beam mounting fitting 55 described above are the same, the same components are given the same reference numerals and their explanations are omitted.

[0071] As shown in Figures 14(A) and (B), the floor pressing fitting 65 of this example uses a bolt 66 as a locking member. The floor pressing fitting 65 has a bolt 66 as a locking member that is locked to a through hole 8 (Figure 15) provided in the lower surface side base material 1c of the extruded cement board flooring 1, a plate-shaped part 67 extending from the bolt 66 toward the end of the extruded cement board flooring 1, and a support part 68 that is bent downward at the end of the plate-shaped part 67. The bolt 66 is provided so as to protrude downward at a predetermined position of the plate-shaped part 67 (the position of the through hole 8 as the locking part provided in the extruded cement board flooring 1). The method of fixing the bolt 66 is not limited, and a method of fixing the bolt 66 to the plate-shaped part 67 by welding, a method of protruding the bolt upward from the plate-shaped part 67 and fixing the bolt with a nut, etc. can be used.

[0072] Furthermore, a through hole 67a is provided in a position of the plate-shaped portion 67 adjacent to the support portion 68, through which the bolt material 58 provided in the beam mounting bracket 55 is inserted. A recess 68a is provided in the center of the support portion 68 in the direction of the through hole 67a. Upward protrusions 67b are provided on both sides of the through hole 67a in the longitudinal direction of the plate-shaped portion 67, improving the bending strength of the floor material pressing bracket 65.

[0073] As shown in Figures 15(A) and (B), according to the third mounting bracket 50 using the floor pressing bracket 65, the bolt 66 of the floor pressing bracket 65 is inserted into the through hole 8 of the extruded cement board flooring 1 in advance and fixed with a nut 66a from the bottom. Then, after the beam mounting bracket 55 is attached to the beam 5, the extruded cement board flooring 1 is placed close to the bolt material 58 of the beam mounting bracket 55. At this time, the bolt material 58 is placed so as to be inserted into the through hole 67a of the floor pressing bracket 65. After that, the nut material 59 is screwed into the bolt material 58 and tightened, so that the lower surface side base material 1c of the extruded cement board flooring 1 is pressed toward the beam 5 by the floor pressing bracket 65. This allows the extruded cement board flooring 1 to be fastened to the beam 5.

[0074] (Reference example No. 4 mounting bracket) Figure 16 is a perspective view showing a floor pressing fitting 71 of a fourth mounting fitting 70 (Figure 17) of a reference example. The beam mounting fitting 55 in the fourth mounting fitting 70 is the same as the beam mounting fitting 55 of the third mounting fitting 50 described above, so the same components are given the same reference numerals and their explanations are omitted. The fourth mounting fitting 70 can fasten the extruded cement board flooring 1 to the beam 5 even if the lower surface base material 1c of the extruded cement board flooring 1 does not have a through hole 8 as a retaining portion.

[0075] The floor pressing metal fitting 71 has a fixing part 72 having a through hole 72a through which the bolt material 58 (FIG. 17) of the beam mounting metal fitting 55 is inserted, an inclined part 73 that slopes diagonally downward from the fixing part 72 toward the lower side base material 1c of the extruded cement board flooring material 1, and a horizontal part 74 that runs along the upper surface of the lower side base material 1c from the inclined part 73. The inclined part 73 is formed so that the fixing part 72 is located a predetermined distance above the lower side base material 1c when the horizontal part 74 is in contact with the lower side base material 1c of the extruded cement board flooring material 1. In addition, a support part 75 that is bent downward is provided in the opposite direction to the inclined part 73 of the fixing part 72. A contact member 75a that contacts the bolt material 58 of the beam mounting metal fitting 55 is provided on the through hole 72a side of the lower end of the support part 75. Furthermore, a reinforcing member 72b is provided on the upper surface from the fixing part 72 to the inclined part 73 and the horizontal part 74. The reinforcing member 72b is formed into a rib shape by, for example, fixing a plate material by welding or pressing it with a press.

[0076] (Example of using the 4th mounting bracket) FIG. 17 is a side cross-sectional view of the fourth mounting bracket 70 using the floor pressing bracket 71 shown in FIG. 16 attached to the beam 5. With the fourth mounting bracket 70 using the floor pressing bracket 71, the beam mounting bracket 55 is attached to a predetermined position of the beam 5, and the extruded cement board flooring 1 is placed on the beam 5 so as to be close to the bolt material 58 provided in the main body 56. Then, the floor pressing bracket 71 is inserted into the hollow portion 2 of the extruded cement board flooring 1, and the bolt material 58 is inserted into the through hole 72a. In this state, the horizontal portion 74 of the floor pressing bracket 71 contacts the lower surface side base material 1c, and the fixing portion 72 is positioned a predetermined amount above the lower surface side base material 1c by the inclined portion 73. After that, the nut material 59 is screwed into the bolt material 58 and tightened, so that the floor pressing bracket 71 presses the lower surface side base material 1c of the extruded cement board flooring 1 toward the beam 5. This allows the extruded cement board floor material 1 to be fastened to the beam material 5.

[0077] By using the floor pressing fittings 71, even when the extruded cement board flooring 1 is placed on one side of the beam 5 at the end of the construction floor, the extruded cement board flooring 1 can be pressed against the beam 5 and fastened in place.

[0078] (Reference example No. 5 mounting bracket) Fig. 18 is an exploded perspective view showing a fifth mounting bracket 80 of a reference example. The extruded cement board flooring material 1 that is attached to a beam 5 with the fifth mounting bracket 80 has the end of the upper surface side base material 1b cut away and the upper part of the crosspiece 1a exposed (Fig. 19). The fifth mounting bracket 80 is equipped with a flooring material pressing bracket 81 that is attached so as to press against the crosspiece 1a in the portion where the end of the upper surface side base material 1b of the extruded cement board flooring material 1 has been cut away, and a beam mounting bracket 85 that is attached to the beam 5 (Fig. 19).

[0079] The floor material pressing fitting 81 has a cross section formed in a roughly inverted U-shape so as to straddle the crosspiece 1a of the extruded cement board floor material 1, and has a pressing portion 82 extending parallel to the crosspiece 1a, and end holders 83 bent upward at both ends of the pressing portion 82 to hold the ends of the upper base material 1b of the extruded cement board floor material 1. A through hole 82a is provided in the center of the pressing portion 82, through which a bolt material 88 provided on the beam mounting fitting 85 is inserted.

[0080] The beam mounting bracket 85 has a planar main body portion 86 arranged above the beam 5, a clamping portion 87 that clamps the flange portion 6 (FIG. 19) of the beam 5 from one side in the width direction between the main body portion 86 and the clamping portion 87, a bolt material 88 serving as a retaining portion provided above the main body portion 86, and a nut material 89 that is screwed into the bolt material 88. The clamping portion 87 is formed by bending downward a predetermined position extending on one side of the main body portion 86 made of a plate material, and bending the end portion to a predetermined position so as to extend downwardly of the main body portion 56. The clamping portion 87 is formed to clamp the flange portion 6 (FIG. 19) of the beam 5.

[0081] The main body 86 of the fifth mounting fitting 80 is also provided with a hook portion 90, which is arranged in the opposite direction to the clamping portion 87 extending in one of the left and right directions and which is hooked onto the other end in the width direction of the flange portion 6 clamped by the clamping portion 87. The hook portion 90 in this example has a support portion 90a located on the upper surface of the main body 86, an inclined portion 90b extending diagonally downward from the support portion 90a, a horizontal portion 90c continuing from the inclined portion 90b and horizontally contacting the flange portion 6 (FIG. 19), and an end holding portion 90d continuing from the horizontal portion 90c and hooked onto the end of the flange portion 6. The end holding portion 90d in this example is bent downward at an angle θ of approximately 90° with respect to the horizontal portion 90c. The beam mounting bracket 85 of the fifth mounting bracket 80 holds the flange portion 6 of the beam 5 horizontally from both ends by the clamping portion 87 and the end holding portion 90d of the hanging portion 90, so that the beam mounting bracket 85 can be firmly held to the beam 5.

[0082] Furthermore, the fifth mounting bracket 80 also has a step 86a so that the main body 86 is spaced upward from the clamping portion 87. The step 86a forms a gap V (FIG. 19(B)) between the main body 86 and the beam 5, providing a cushioning effect that prevents vibrations of the extruded cement board floor material 1 from being transmitted from the fifth mounting bracket 80 to the beam 5.

[0083] (Example of using the 5th mounting bracket) FIG. 19 is a diagram showing the fifth mounting bracket 80 shown in FIG. 18 attached to a beam 5 in use, (A) being a plan view, and (B) being a cross-sectional view from the side. When attaching an extruded cement board flooring 1 to a beam 5 using the fifth mounting bracket 80, the beam mounting bracket 85 is inserted so as to clamp the flange 6 of the beam 5 from one side in the width direction with the clamping portion 87, and the end holding portion 90d of the hook portion 90 is hung on the other end of the flange 6 in the width direction to attach it to a predetermined position on the beam 5. After that, the extruded cement board flooring 1 is placed so that the crosspieces 1a are adjacent to each other, sandwiching the bolt material 88 provided on the main body portion 86 of the beam mounting bracket 85. The extruded cement board flooring 1 is placed on the buffer material 4 placed on the beam 5.

[0084] Then, the flooring pressing fitting 81 is inserted through the through hole 82a into the bolt material 88 provided on the main body 86. The flooring pressing fitting 81 is attached in a state where the opening part of the U-shaped cross section is inserted downward and straddles the crosspieces 1a of adjacent extruded cement board flooring materials 1. After that, the nut material 89 is screwed onto the bolt material 88 and tightened, so that the pressing part 82 presses the crosspieces 1a of the extruded cement board flooring material 1 against the beam material 5. This allows the adjacent extruded cement board flooring materials 1 to be fastened to the beam material 5.

[0085] Moreover, according to the fifth mounting bracket 80, the floor material pressing bracket 81 holds the crosspiece 1a from above, so mounting can be performed firmly. Moreover, according to the fifth mounting bracket 80, the end of the upper surface side base material 1b of the extruded cement board flooring 1 is also held by the end holding portion 83 of the floor material pressing bracket 81, so mounting of the extruded cement board flooring 1 can be performed more firmly. Furthermore, the fifth mounting bracket 80 can reduce the number of parts. Moreover, since the extruded cement board flooring 1 can be attached to the beam 5 by working downward from above on the construction floor, workability can be improved.

[0086] Furthermore, the fifth mounting bracket 80 can simultaneously press adjacent extruded cement board flooring materials 1 placed on the left and right sides of the beam 5 with one floor pressing bracket 81. Therefore, the work of holding adjacent extruded cement board flooring materials 1 can be done in one place, making the installation work of the extruded cement board flooring materials 1 efficient.

[0087] Furthermore, when the fifth mounting bracket 80 is attached, a gap V is formed between the fifth mounting bracket 80 and the beam 5 by the step 86a of the main body 86 (FIG. 19(B)). This gap V provides a cushioning characteristic that suppresses the propagation of vibration from the fifth mounting bracket 80 to the beam 5. This suppresses the transmission of vibration to the beam 5, improving sound insulation.

[0088] (Example of mounting structure using the 5th mounting bracket) FIG. 20 is a perspective view showing a mounting structure in which the extruded cement board flooring 1 is fastened to the beam 5 by the fifth mounting bracket 80 shown in FIG. 18. The fifth mounting bracket 80 is attached to a predetermined position of the beam 5 by inserting the beam mounting bracket 85 so that the clamping portion 87 clamps the flange portion 6 of the beam 5 from one side in the width direction, and the end holding portion 90d of the hook portion 90 is hung on the other end of the flange portion 6 in the width direction (FIG. 19). After the beam mounting bracket 85 is attached, the extruded cement board flooring 1 is placed on the beam 5 so that they are adjacent to each other with the bolt material 88 of the beam mounting bracket 85 in between (only one of the extruded cement board flooring 1 is shown in the figure). The crosspiece 1a (FIG. 19(A)) with the end of the upper surface side base material 1b cut off is placed at the position of the bolt material 88.

[0089] Then, the floor material pressing fitting 81 is inserted through the bolt material 88 from the through hole 82a and attached in a state spanning the crosspiece 1a of the adjacent extruded cement board floor material 1. After that, the nut material 89 is screwed into the bolt material 88 and tightened, so that the extruded cement board floor material 1 can be pressed against the beam material 5 by the floor material pressing fitting 81 and fastened.

[0090] (Reference example No. 6 mounting bracket) 21 is a drawing showing a sixth mounting bracket 100 of a reference example, where (A) is an exploded perspective view and (B) is a perspective view showing a beam mounting bracket 110 different from (A). The sixth mounting bracket 100 has a floor material pressing bracket 101 that is different from that of the fifth mounting bracket 80. Note that since the fifth mounting bracket 80 and the beam mounting bracket 85 described above are the same, the same components are given the same reference numerals and their explanations are omitted.

[0091] The floor material pressing fitting 101 of the sixth mounting fitting 100 has a high U-shaped cross-section formed to straddle the crosspiece 1a of the extruded cement board floor material 1, and has a pressing part 102 extending parallel to the crosspiece 1a, and bent parts 103 that bend outward at both lower ends of the floor material pressing fitting 101. The height of the floor material pressing fitting 101 is equal to the height of the crosspiece 1a of the extruded cement board floor material 1. A through hole 102a is provided in the center of the pressing part 102, through which the bolt material 88 provided on the beam mounting fitting 85 is inserted.

[0092] With this sixth mounting bracket 100, the extruded cement board flooring 1 is placed on the bolt 88 provided on the main body 86 of the beam mounting bracket 85 attached to the beam 5 so that the crosspiece 1a with the end of the upper base material 1b cut off is adjacent to the bolt 88 provided on the main body 86 (similar to FIG. 19). Then, the floor pressing bracket 101 is inserted from the through hole 102a into the bolt 88 provided on the main body 86. The floor pressing bracket 101 is inserted with the opening part of the U-shaped cross section facing downward, so that it straddles the crosspiece 1a of the adjacent extruded cement board flooring 1 (similar to FIG. 19). After that, the nut 89 is screwed into the bolt 88 and tightened, so that the pressing part 102 presses the extruded cement board flooring 1 against the beam 5 to fasten it. In this sixth mounting bracket 100, the pressing portion 102 of the floor material pressing bracket 101 presses against the upper surface of the crosspiece portion 1a, and the bent portion 103 presses against the underside base material 1c of the extruded cement board floor material 1, thereby ensuring a firm attachment.

[0093] The example shown in Fig. 21(B) differs from the example shown in Fig. 21(A) in the hook portion 115 of the beam mounting bracket 110. Only the hook portion 115 will be described, and the same configuration as in Fig. 21(A) will be given a reference number with "25" added, and description thereof will be omitted. The hook portion 115 provided on the main body portion 111 of this example has, at the end extending from the main body portion 111, a first bent portion 115a bent downward toward the clamping portion, a second bent portion 115b bent from the lower end of the first bent portion 115a in the opposite direction to the clamping portion, and a third bent portion 115c bent upward from the lower end of the second bent portion 115b.

[0094] The main body 111 is inserted with one end of the flange 6 clamped by the clamping portion 112, and when the hook portion 115 reaches a position where it can be hung on the other end of the flange 6, it is temporarily locked by the second bent portion 115b, and when the upper surface of the hook portion 115 is hit with a hammer or the like, the first bent portion 115a fits in and is attached. The third bent portion 115c allows easy removal by hitting the corner of the bend with a hammer or the like. The configuration of the hook portions 90, 115 can be either one of those shown in FIG. 21(A) or (B). By providing the hook portion 90 (115), both ends of the flange 6 of the beam 5 are clamped horizontally by the clamping portion 87 (112) and the hook portion 90 (115), so that the holding force for holding the beam mounting bracket 110 to the beam 5 can be strengthened.

[0095] (Reference example No. 7 mounting bracket) Fig. 22 is an exploded perspective view showing a seventh mounting bracket 120 of a reference example. The seventh mounting bracket 120 comprises a floor material mounting bracket 121 that is attached to an extruded cement board floor material 1 (Fig. 23), and a beam material mounting bracket 125 that is attached to a beam material 5 (Fig. 23).

[0096] The flooring mounting bracket 121 has a pin 122 as a locking member that locks into a through hole 3 (Fig. 23) that serves as a locked portion provided on the back side of the extruded cement board flooring material 1, a plate-like portion 123 that extends from the pin 122 to the end of the extruded cement board flooring material 1, and a rising portion 124 that rises upward at the end of the plate-like portion 123. The rising portion 124 may be provided with a folded portion that is bent diagonally downward. If a folded portion is provided, when the rising portion 124 is pressed by the pressing portion 131c of the pressing member 131 described below, the spring pressure effect of the folded portion allows the rising portion 124 to be pressed more strongly.

[0097] The beam mounting bracket 125 has a planar main body 126 arranged above the beam 5, a clamping portion 127 that clamps the flange 6 (FIG. 23) of the beam 5 from one side in the width direction, and a hollow portion holding portion 128 provided above the main body 126. The main body 126 made of a plate material is bent downward at a predetermined position extending on one side, and the end portion is bent to a predetermined position so as to extend downward from the main body 126 to form the clamping portion 127. The clamping portion 127 is formed so as to clamp the flange 6 (FIG. 2) of the beam 5. In addition, the main body 126 of this example is provided with an engagement portion 126b at the clamping portion 127 for engaging with the engaged portion 7 provided on the flange 6 of the beam 5.

[0098] The hollow section holding section 128 has a pedestal 129 of a predetermined height provided on the upper surface of the main body section 126, a rotation prevention member 130 provided on the upper part of the pedestal 129, and a pressing member 131 provided above the rotation prevention member 130. The pedestal 129 is provided so as to rise at a predetermined height, leaning to one side in the front-rear direction from the main body section 126 (the front in this example (FIG. 25)). A bolt hole 129b into which a bolt 132 is screwed is provided on the upper surface 129a of the pedestal 129. The height of the pedestal 129 is set to a height that can press the rising section 124 of the floor material mounting bracket 121 (FIG. 23(B)). The pedestal 129 may be configured to rise at the center part of the main body section 126 in the front-rear direction. The anti-rotation member 130 has a claw portion 130a protruding upward, and a through hole 130b is provided at the portion of the bolt hole 129b of the base 129. The anti-rotation member 130 locks the pressing member 131 in a retracted state in which the pressing member 131 has rotated so that it is parallel to the edge of the extruded cement board floor material 1.

[0099] The pressing member 131 is rotatable around the bolt 132, which is a rotation axis, and the bolt 132 is inserted at a predetermined position. The bolt 132 can be, for example, a hexagonal socket bolt. The pressing member 131 is provided with pressing parts 131c bent downward at both ends of the support part 131b through which the bolt 132 is inserted, so as to press the rising part 124 of the floor material mounting bracket 121. The support part 131b of the pressing member 131 is provided with a recess 131a that abuts against the claw part 130a of the rotation prevention member 130. The pressing member 131 rotates around the bolt 132, which is a rotation axis, between a positioning state in which the pressing member 131 presses the rising part 124 of the floor material mounting bracket 121 to press the extruded cement board flooring 1 against the beam material 5, and a retracted state in which the pressing member 131 is removed from the hollow part 2 of the extruded cement board flooring 1.

[0100] The bolt 132 is provided with a spring member 133 that abuts against the underside of the pressing member 131. When the bolt 132 is screwed into the bolt hole 129b of the base 129, the pressing member 131 is urged by the spring member 133 toward the head 132a of the bolt 132. When the lower end of the bolt 132 is screwed into the bolt hole 129b of the base 129, the spring member 133 holds the pressing member 131 at a height that allows it to abut against the head 132a and rotate toward the hollow portion 2 of the extruded cement board floor material 1.

[0101] Furthermore, the seventh mounting bracket 120 is provided with a step 126a so that the main body 126 is separated upward from the clamping portion 127. The step 126a is formed by bending upward between the main body 126 and the clamping portion 127. By providing the step 126a, a gap V (FIG. 23(B)) is formed between the main body 126 and the beam 5, as described below. By forming the gap V, it is possible to exhibit a buffering characteristic that suppresses the vibration of the extruded cement board floor material 1 from the seventh mounting bracket 120 to the beam 5. In other words, since the step 126a can provide a buffering characteristic against vibration propagation, it is possible to suppress the vibration transmitted from the seventh mounting bracket 120 to the beam 5.

[0102] A pair of flooring mounting brackets 121 are provided at positions facing one beam mounting bracket 125. The rising portions 124 of the pair of flooring mounting brackets 121 are pressed simultaneously by the pressing members 131 of the beam mounting brackets 125 to fasten the extruded cement board flooring 1 to the beam 5.

[0103] By rotating the bolt 132 in the direction of tightening, the pressing member 131 becomes engaged with the claw portion 130a of the anti-rotation member 130 and stops (Figure 23(A)). This state is the positioning state of the pressing member 131, and the pressing member 131 can press the rising portion 124 of the flooring mounting bracket 121. Also, by rotating the bolt 132 in the direction of loosening, the pressing member 131 comes out of the hollow portion 2 of the extruded cement board flooring material 1 and becomes engaged with the claw portion 130a of the anti-rotation member 130 and stops. This state is the retracted state of the pressing member 131 (similar to Figure 27 described later).

[0104] With this seventh mounting fixture 120, the pressing member 131 is locked by the anti-rotation member 130 in a state parallel to the edge of the extruded cement board flooring material 1 in the retracted state, and locked in a state facing the extension direction of the hollow portion 2 of the extruded cement board flooring material 1 in the deployed state, so that it stops at an appropriate position for the retracted state and the deployed state. This makes it possible to efficiently install the extruded cement board flooring material 1.

[0105] When the bolt 132 of the pressing member 131 is tightened in the arranged state, the spring member 133 is compressed and presses the rising portion 124 of the floor material mounting bracket 121 towards the beam 5. This allows the floor material mounting bracket 121 to press and fasten the extruded cement board floor material 1 against the beam 5.

[0106] (Example of using the 7th mounting bracket) Figure 23 is a drawing showing the state in which the seventh mounting bracket 120 shown in Figure 22 is attached to a beam material 5, where (A) is a cross-sectional view taken along the arrows XXIII-XXIII shown in (B), and (B) is a cross-sectional view taken from the side.

[0107] According to the seventh mounting bracket 120, the buffer material 4 is placed on the beam 5, and the extruded cement board flooring 1 is placed on top of it. Then, the beam mounting bracket 125 is attached so that the clamping portion 127 clamps the flange portion 6 of the beam 5 from one side in the width direction. The beam mounting bracket 125 may be attached to the beam 5 either before placing the extruded cement board flooring 1 or after placing one of the extruded cement board floorings 1. Even after placing the extruded cement board flooring 1, a space S of the thickness of the buffer material 4 is formed at the joint of the buffer material 4 in the middle part of the front-rear direction of the extruded cement board flooring 1. Therefore, the main body 126 of the beam mounting bracket 125 can be inserted and attached by using this space S. In this case, after the beam mounting bracket 125 is attached, it is preferable to orient the pressing member 131 in a direction perpendicular to the extension direction of the hollow portion 2. Furthermore, a flooring mounting fixture 121 is inserted into the hollow portion 2 of the extruded cement board flooring 1 and a pin 122 is engaged with the through hole 3 .

[0108] According to this seventh mounting bracket 120, after placing the extruded cement board flooring 1 on the left and right of the beam mounting bracket 125 attached to the beam 5, the bolt 132 is rotated from the joint portion M of the adjacent extruded cement board flooring 1 (between the extruded cement board flooring 1 shown in FIG. 28(B)). The pressing member 131 rotated by the bolt 132 enters the hollow portion 2 of the extruded cement board flooring 1 and comes into contact with the claw portion 130a of the rotation prevention member 130 and stops when it is placed in position (FIG. 23(A)). After that, by further screwing in the bolt 132 in this state, the pressing member 131 presses the rising portion 124 of the floor mounting bracket 121, and the extruded cement board flooring 1 can be pressed against the beam 5 and secured in place.

[0109] Moreover, the seventh mounting bracket 120 simultaneously presses the rising portions 124 of the floor mounting brackets 121 attached to adjacent extruded cement board flooring materials 1 placed on the left and right sides of the beam 5 with the pressing members 131. This allows the work of holding adjacent extruded cement board flooring materials 1 to be done in one place, making the installation work of the extruded cement board flooring materials 1 efficient. The same applies to the eighth mounting bracket 140 described below.

[0110] Furthermore, with the seventh mounting bracket 120 in an attached state in which the flange portion 6 of the beam 5 is clamped by the clamping portion 127, a gap V is formed between the seventh mounting bracket 120 and the beam 5 by the step portion 126a of the main body portion 126 (FIG. 23(B)). This gap V provides a cushioning characteristic that suppresses the propagation of vibration from the seventh mounting bracket 120 toward the beam 5. This suppresses the vibration transmitted to the beam 5, improving sound insulation. The same applies to the eighth mounting bracket 140, which will be described later.

[0111] (Reference example No. 8 mounting bracket) 24 is an exploded perspective view showing an eighth mounting bracket 140 of the reference example. In the eighth mounting bracket 140, part of the beam mounting bracket 145, the floor material mounting bracket 141, and the pressing member 151 are configured differently from the seventh mounting bracket 120. In the following explanation, only the configurations that differ from the seventh mounting bracket 120 will be explained, and the same configurations will be given reference numbers with the number "20" added, and explanations of those configurations will be omitted.

[0112] The flooring mounting bracket 141 of the eighth mounting bracket 140 has a bolt 142 as a locking member that locks into the through hole 3 (Fig. 23) that is the locked portion of the extruded cement board flooring material 1. The plate-shaped portion 143 of the flooring mounting bracket 141 is provided with a threaded portion 143a into which the bolt 142 is screwed. Near the edge of the extruded cement board flooring material 1 of the flooring mounting bracket 141, a rising portion 144 is provided that bends upward and rises.

[0113] The eighth mounting bracket 140 has a bolt 142 as the engaging portion, which strengthens the connection between the floor mounting bracket 141 and the extruded cement board flooring 1, thereby making it possible to attach the extruded cement board flooring 1 more firmly.

[0114] Furthermore, the eighth mounting fitting 140 has a cutout 146c provided in the upper surface portion of the main body 146. Providing the cutout 146c makes it possible to reduce sound propagation even if the main body 146 comes into contact with the beam 5. The cutout 146c is not essential. The other configuration is the same as that of the seventh mounting fitting 120, so a detailed description will be omitted.

[0115] With this type of eighth mounting fixture 140, the pressing member 151 is locked by the anti-rotation member 150 in a state parallel to the edge of the extruded cement board flooring material 1 in the retracted state, and locked in a state facing the extension direction of the hollow portion 2 of the extruded cement board flooring material 1 in the deployed state, so that it stops at an appropriate position for the retracted state and the deployed state. This makes it possible to efficiently install the extruded cement board flooring material 1.

[0116] Then, with the pressing member 151 of the hollow portion holding portion 148 in the arranged state, the bolt 152 is tightened to compress the spring member 153, which presses the rising portion 144 of the floor material mounting bracket 141 towards the beam 5. This allows the floor material mounting bracket 141 to press and fasten the extruded cement board floor material 1 against the beam 5.

[0117] (Example of mounting structure using No. 8 mounting bracket) Fig. 25 is a perspective view showing a mounting structure in which the eighth mounting bracket 140 shown in Fig. 24 is mounted on a beam 5. The eighth mounting bracket 140 is mounted so that the beam mounting bracket 145 clamps the flange portion 6 of the beam 5 from one side in the width direction with the clamping portion 147. After the beam mounting bracket 145 is mounted, it is recommended that the pressing member 151 be oriented in a direction perpendicular to the extension direction of the hollow portion 2 so as not to be an obstacle when placing the extruded cement board flooring material 1. Meanwhile, the flooring mounting bracket 141 is inserted into the hollow portion 2 of the extruded cement board flooring material 1 in advance, and fixed to the through hole 3 of the extruded cement board flooring material 1 with a bolt 152.

[0118] According to the eighth mounting bracket 140, after placing the extruded cement board flooring 1 on the left and right of the beam mounting bracket 145 attached to the beam 5 (only one of the extruded cement board floorings 1 is shown in the figure), the bolt 152 is rotated from the joint portion M (between the extruded cement board floorings 1 shown in FIG. 23(B)) of the adjacent extruded cement board floorings 1. As a result, the pressing member 151 is rotated and enters the hollow portion 2 of the extruded cement board flooring 1 to be placed in position, where it comes into contact with the claw portion 150a of the rotation prevention member 150 and stops (similar to FIG. 23(a)). After that, by further screwing in the bolt 152, the rising portion 144 of the floor mounting bracket 141 is pressed by the pressing member 151 toward the extruded cement board flooring 1, and the extruded cement board flooring 1 can be pressed toward the beam 5 and fastened.

[0119] (Ninth mounting bracket according to the present invention) Figure 26 is an exploded perspective view showing a ninth mounting bracket 160 according to the present invention. Figure 27 is a plan view of the beam mounting bracket 165 and hollow section holding section 168 of the ninth mounting bracket 160 shown in Figure 26 when assembled. The ninth mounting bracket 160 comprises a flooring mounting bracket 161 that is attached to the extruded cement board flooring 1 (Figure 28), and a beam mounting bracket 165 that is attached to the beam 5 (Figure 28).

[0120] The flooring mounting bracket 161 has a clamping portion 164 that clamps the flange portion 6 of the beam material 5 provided at one end of the plate-shaped portion 163, and a pin 162 that serves as a locking member that locks into the through hole 3 (Figure 28) that serves as the locking portion provided on the back side of the extruded cement board flooring material 1.

[0121] The beam mounting bracket 165 has a main body 166 arranged above the beam 5, a clamping portion 167 that clamps the flange portion 6 of the beam 5 from one side in the width direction, and a hollow portion holding portion 168 provided above the main body 166. A latch portion 174 is provided on the side of the main body 166 opposite the clamping portion 167. A pedestal 169 of a predetermined height is provided on the upper surface of the main body 166, and a rotation prevention member 170 is provided on the upper portion of the pedestal 169. A pressing member 171 is provided above the rotation prevention member 170. The pedestal 169 is provided so as to rise from the main body 166 at a predetermined height (lower than the thickness of the lower side of the hollow portion 2 of the extruded cement board floor material 1 in order to obtain the holding force of the bolt 172), and a bolt hole 169b into which the bolt 172 is screwed is provided at the front-rear end of the upper surface. The height of the base 169 is lower than the thickness of the flooring material below the hollow portion 2 of the extruded cement board flooring material 1 in order to obtain the holding force of the bolt 172 (FIG. 28(B)). The anti-rotation member 170 has a claw portion 170a protruding upward, and a through hole 170b is provided on the outer side in the front-to-rear direction at the portion of the bolt hole 169b of the base 169.

[0122] The pressing member 171 has a bolt 172, which serves as a rotation axis, inserted at a predetermined position, and is rotatable around the bolt 172. The bolt 172 can be, for example, a hexagonal socket bolt. One end of the pressing member 171, which presses the extruded cement board flooring material 1, is slightly bent downward so as to receive a reaction force. The other end of the pressing member 171 has a recess 171a at a portion that abuts against the claw portion 170a of the rotation prevention member 170. The bolt 172 is provided with a spring member 173 that abuts against the lower surface of the pressing member 171. By screwing the bolt 172 into the bolt hole 169b of the base 169, the pressing member 171 is urged by the spring member 173 toward the head 172a of the bolt 172. When the tip of the bolt 172 is screwed into the bolt hole 99b of the base 99, the pressing member 171 is held at a height that allows it to abut against the head 172a and rotate toward the hollow portion 2 of the extruded cement board floor material 1 by the spring member 173.

[0123] As shown in Figure 27, by rotating the bolt 172 in the direction of tightening the pressing member 171, one end enters the hollow portion 2 of the extruded cement board flooring material 1 and is locked with the claw portion 170a of the rotation prevention member 170, resulting in a stationary arrangement state A. By rotating the bolt 172 in the direction of loosening the pressing member 171, one end comes out of the hollow portion 2 of the extruded cement board flooring material 1 and the recessed portion 171a is locked with the claw portion 170a of the rotation prevention member 170, resulting in a stationary retracted state B. The recessed portion 171a is intended to properly accommodate the pressing member 171 within the joint portion M (between the extruded cement board flooring materials 1 shown in Figure 28(B)) when the pressing member 171 is in the retracted state.

[0124] In this way, the pressing member 171 is locked by the anti-rotation member 170 in a state parallel to the edge of the extruded cement board flooring material 1 in the retracted state, and locked in a state in which it has entered the hollow portion 2 of the extruded cement board flooring material 1 and is facing in the direction of extension of the hollow portion 2 in the deployed state, so that it stops at an appropriate position for the retracted state at approximately 90 degrees and the deployed state. This allows the installation work of the extruded cement board flooring material 1 to be carried out efficiently, as described below.

[0125] (Examples of use of mounting brackets and mounting structures No. 9) Fig. 28 is a drawing showing the use state of the ninth mounting bracket 160 shown in Fig. 26 attached to a beam 5, (A) is a cross-sectional view taken along the line XXVIII-XXVIII shown in (B), and (B) is a cross-sectional view taken from a side. Fig. 29 is a perspective view showing a mounting structure in which the ninth mounting bracket 160 shown in Fig. 26 is attached to a beam 5.

[0126] According to the ninth mounting bracket 160, the floor mounting bracket 161 is attached to the beam 5 at a predetermined position by clamping the flange 6 with the clamping portion 167 from one side in the width direction. On the other hand, the beam mounting bracket 165 is attached by clamping the flange 6 of the beam 5 with the clamping portion 167 from one side in the width direction. After the beam mounting bracket 165 is attached, it is recommended that the pressing member 171 be oriented in a direction perpendicular to the extension direction of the hollow portion 2 so as not to be an obstacle when placing the extruded cement board flooring 1. When the beam mounting bracket 165 is attached after placing one of the extruded cement board flooring materials 1 arranged on the left and right, it can be attached by utilizing the space S (similar to FIG. 23(B)) that is created between the beam 5 and the extruded cement board flooring 1, which is the thickness of the buffer material 4.

[0127] Then, the extruded cement board flooring 1 is placed on the left and right of the beam mounting brackets 165 attached to the beam 5, and the pins 162 of the floor mounting brackets 161 are engaged with the through holes 3 of the extruded cement board flooring 1. The floor mounting brackets 161 can be attached simply by placing the extruded cement board flooring 1 on top of the beam 5 in advance and aligning the position of the through holes 3, so there is no need to accurately align the floor mounting brackets 161, allowing for easy installation.

[0128] Then, the bolt 172 is rotated from the joint portion M of the adjacent extruded cement board flooring materials 1 (between the extruded cement board flooring materials 1 shown in Figure 28 (B)). The pressing member 171 of the hollow portion holding portion 168, which is rotated by the rotation of the bolt 172, enters the hollow portion 2 of the extruded cement board flooring material 1 and abuts against the claw portion 170a, becoming arranged (the state of Figure 27). Then, by further screwing in the bolt 172, the pressing member 171 presses the extruded cement board flooring material 1 against the beam material 5 to fasten it in place. With the ninth mounting bracket 160, the work of holding adjacent extruded cement board flooring materials 1 with individual pressing members 171 can be performed in one place, making the installation work of the extruded cement board flooring materials 1 efficient.

[0129] Furthermore, according to the ninth mounting bracket 160, with the flooring mounting bracket 161 already attached to the beam 5, the extruded cement board flooring 1 can be aligned by engaging the through hole 3 in the extruded cement board flooring 1 with the pin 162 of the flooring mounting bracket 161, thereby improving workability.

[0130] Furthermore, with the ninth mounting bracket 160, when the beam mounting bracket 165 is in an attached state with the flange portion 6 of the beam 5 clamped by the clamping portion 167, the main body portion 166 is raised above the upper surface of the beam 5, forming a gap portion V (FIG. 28(B)). This gap portion V can exhibit a cushioning characteristic that suppresses the propagation of vibration from the extruded cement board floor material 1 to the beam 5. Therefore, the vibration transmitted to the beam 5 can be suppressed, improving sound insulation.

[0131] (Other variations) The main body 166 of the beam mounting bracket 165 may have a configuration that does not have the step 166a, and is not limited to the above embodiment. Also, the main body 166 can be configured to be usable in either a configuration in which the beam 5 has an engaged portion 7 such as a through hole, or a configuration in which the engaged portion 7 is not provided, and is not limited to the above embodiment.

[0132] Furthermore, the above-mentioned reference example is just one example, and the cutout portion 1d provided in the upper surface base material 1b of the extruded cement board flooring material 1 may be on both or either side of the extruded cement board flooring material 1 placed on the beam material 5 along the bolt materials 18, 38, 58, 88, and the size, number, etc. are not limited.

[0133] Furthermore, the above-described embodiment is merely an example, and various modifications are possible without departing from the spirit of the present invention, and the present invention is not limited to the above-described embodiment.

[0134] (Summary) With the above-described mounting bracket 160, the work of fastening the extruded cement board flooring 1 to the beam 5 can be easily performed by placing the extruded cement board flooring 1 on the construction floor with the beam mounting bracket 165 attached to the beam 5. Furthermore, since the extruded cement board flooring 1 can be fastened to the beam 5 by working downward from above, workability can be improved.

[0135] In the reference example, the extruded cement board flooring 1 is fastened to the beam 5 by the beam mounting fittings 15, 35, 55, 85, 110 and the floor pressing fittings 11, 31, 51, 65, 71, 81, 101, so that the extruded cement board flooring 1 can be held firmly. Moreover, the extruded cement board flooring 1 can be firmly attached by simply processing the back or front of the extruded cement board flooring 1.

[0136] Furthermore, even if the extruded cement board flooring 1 is fastened to the beam 5 by the beam mounting brackets 125, 145, 165, the floor mounting brackets 121, 141, 161 and the pressing members 131, 151, 171, it is possible to firmly hold the extruded cement board flooring 1. Also, since the mounting brackets 120, 140, 160 do not get in the way of the pressing members 131, 151, 171 that press the extruded cement board flooring 1 downward when the beam mounting brackets 125, 145, 165 are attached to the beam 5, it is possible to easily place the extruded cement board flooring 1 on the beam 5. [Explanation of symbols]

[0137] 1. Extruded cement board flooring 1a Crosspiece 1b Top side base material 1c Bottom side base material 1d Notch 2 Hollow part 3 Through hole (locked part) 5 Beam material 6 Flange 7 Engaged part 10 First mounting bracket 11 Flooring mounting brackets 15 Beam mounting bracket 16 Main body 17 Clamping part 18 Bolt material (retaining part) 19 Nut material (retaining part) 20 Hook stopper 20d End retainer 21 Hook stopper 21d End holder 25 Flooring pressure fittings 28 Protruding pressure part 30 Second mounting bracket 35 Beam mounting bracket 36 Main body 37 Clamping part 38 Bolt material (retaining part) 39 Nut material (retaining part) 40 Hook stopper 40d End retainer 41 Engagement part 50 Third mounting bracket 51 Flooring pressure fittings 52 Pin (locking member) 53 Plate-shaped part 55 Beam mounting bracket 56 Main body 57 Clamping part 58 Bolt material (retaining part) 59 Nut material (retaining part) 60 Hook stopper 60d End retainer 65 Flooring pressure fittings 66 Bolt (locking member) 67 Plate-shaped part 70 4th mounting bracket 71 Flooring pressure fittings 80 5th mounting bracket 81 Flooring pressure fittings 82 Pressing part 83 End holding part 85 Beam mounting bracket 86 Main body 87 Clamping part 88 Bolt material (retaining part) 89 Nut material (retaining part) 90 Hook stopper 90d End retainer 100 6th mounting bracket 101 Flooring pressure fittings 102 Pressing part 110 Beam mounting bracket 120 7th mounting bracket 121 Flooring mounting bracket 122 Pin (locking member) 125 Beam mounting bracket 126 Main body 127 Clamping part 128 Hollow part holding part 130 Anti-rotation member 131 Pressing member 140 8th mounting bracket 141 Flooring mounting bracket 142 Bolt (locking member) 144 Rising part 145 Beam mounting bracket 146 Main body 147 Clamping part 148 Hollow part holding part 150 Anti-rotation member 151 Pressing member 160 9th mounting bracket 161 Flooring mounting bracket 162 Pin (locking member) 164 Clamping part 165 Beam mounting bracket 166 Main body 167 Clamping part 168 Hollow part holding part 170 Anti-rotation member 171 Pressing member 174 Hook stopper V void area θ angle

Claims

1. A mounting bracket for fastening an extruded cement board floor material having a hollow portion to a beam material, A flooring mounting bracket that is attached to the extruded cement board flooring; A beam mounting bracket that is attached to the beam, The flooring mounting bracket has a locking member that locks into a locking portion provided on the back side of the extruded cement board flooring, a plate-shaped portion that extends from the locking member to the end of the extruded cement board flooring, and a clamping portion that clamps the flange portion of the beam from one side in the width direction, The beam mounting bracket has a main body portion arranged above the beam, a clamping portion connected to the main body portion and clamping the flange portion of the beam from one side in the width direction, and a hollow portion holding portion provided above the main body portion, The hollow portion holding portion has a pressing member which rotates around a rotation axis between an arrangement state in which the extruded cement board flooring material is inserted into the hollow portion of the extruded cement board flooring material to press the extruded cement board flooring material against the beam material, and a retracted state in which the extruded cement board flooring material is removed from the hollow portion of the extruded cement board flooring material, and a rotation prevention member which engages the pressing member in the retracted state in which the pressing member has rotated to a position parallel to the edge of the extruded cement board flooring material. A mounting bracket characterized by:

2. The anti-rotation member is configured to lock the pressing member even in the position where the pressing member is rotated in the direction of extension of the hollow portion of the extruded cement board floor material. The mounting bracket according to claim 1 .

3. The main body further includes a hook portion that is hooked onto the other end in the width direction of the flange portion that is clamped by the clamping portion. The mounting bracket according to claim 1 or 2.

4. The main body portion has a step portion that forms a gap between the main body portion and the upper surface of the beam material. The mounting bracket according to any one of claims 1 to 3.

5. The hook portion has an inclined portion extending obliquely downward from the main body portion, a horizontal portion continuing from the inclined portion and horizontally contacting the flange portion, and an end holding portion continuing from the horizontal portion and holding an end of the flange portion. The mounting bracket according to claim 3.

6. The hook portion further has a folded portion folded upward at the center of the end holding portion. The mounting bracket according to claim 3 or 5.

7. The clamping portion further has an engaging portion that engages with an engaged portion provided on the beam material. The mounting bracket according to any one of claims 1 to 6.

8. A mounting structure in which the extruded cement board floor material having the hollow portion is fastened to the beam material by the mounting bracket according to claim 1, The flooring mounting bracket is attached by clamping the flange portion of the beam from one side in the width direction with the clamping portion and engaging the locking member with the locked portion of the extruded cement board flooring; The beam mounting bracket is attached by clamping the flange portion of the beam from one side in the width direction with the clamping portion, and the extrusion molded cement board floor material is pressed against the beam in the position in which the pressing member is rotated and inserted into the hollow portion. A mounting structure for extruded cement board flooring.

Images