Step floor support legs and step floor support structure

Abstract

To provide a step floor support leg and a step floor support structure using the leg with excellent workability and freedom in setting a direction of a sleeper material freely in curved areas, etc. when constructing a stair-like step floor installed indoors, outdoors, etc. of a building.SOLUTION: There is provided a step floor support leg 2 for supporting an upper and lower subfloor materials of a step floor, respectively, which comprises: a pillar member 6 erected against a foundation surface 1; an upper support 10 disposed on an upper portion of the pillar member and on which a sleeper 20 for the upper subfloor material can be placed; an intermediate support 12 attached to an intermediate portion of the pillar member and on which a sleeper 20 for the lower subfloor material can be placed. The intermediate support 12 is formed in a cylindrical shape arranged horizontally, a through-hole 56 is provided at one end of the intermediate support 12, a loading space portion 60 is formed at the other end on which the sleeper material 20 can be placed, the support member 6 is inserted through the through-hole 56 of the intermediate support 12, and the intermediate support 12 is attached in the intermediate portion of the support member.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a step floor support leg for constructing a stepped step floor to be installed indoors, outdoors, etc. of a building, and to a step floor support structure using the same. [Background technology]

[0002] Regarding stepped floors, the applicant of the present application previously filed an application for a step floor support leg as described in Patent Document 1. This is a step floor support leg that supports each of the base materials for the upper and lower tread surfaces of a step floor, and is positioned on the top of a support member that is erected on the foundation surface.It has a first beam support member on which the beam material for the upper tread surface is placed, and a second beam support member that is attached to the support member and on which the beam material for the lower tread surface is placed, and the second beam support member has a position adjustment device that is attached to the support member and a receiving device that is provided as an attachment to this position adjustment device, and the beam material is placed on the receiving device.

[0003] In addition, the edge joist support member described in Patent Document 2 comprises a support member that supports each end of the two edge joists by placing it on its upper surface, support legs that support the support member, and a movement restricting member that protrudes upward from the support member and restricts the movement of each of the two edge joists in the width direction, and the movement restricting member is configured to be able to switch the axial direction of the edge joists supported by the support member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-84135 A [Patent Document 2] JP 2015-203217 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the step floor support leg described in Patent Document 1, the joists supported by the second joist support member are fixed in one direction, and therefore the orientation of the joists is determined and limited by the orientation of the support member attached to the position adjustment tool. On the other hand, the support member described in Patent Document 2 is a type that allows the orientation of the joists to be changed, but this support member is shaped to be placed at the top of the support leg, and there is a problem that its use is limited due to its structure.

[0006] The present invention has been made to solve the above-mentioned problems, and its object is to provide a step floor support leg and a step floor support structure using the same, which increase the degree of freedom in the placement form of the beams, allow the direction of the beams to be freely set at curved points, etc., and are highly convenient and easy to install. [Means for solving the problem]

[0007] In order to solve the above technical problems, the step floor support leg of the present invention, as shown in Figures 1 and 2, is a step floor support leg 2 that supports the upper and lower floor sub-floor materials of a step floor, and comprises a support member 6 that is erected against a foundation surface 1, an upper support 10 that is arranged on the upper part of the support member 6 and on which the beams 20 related to the upper floor sub-floor material can be placed, and an intermediate support 12 that is attached to the middle part of the support member 6 and on which the beams 20 related to the lower floor sub-floor material can be placed, the intermediate support 12 is formed in a cylindrical shape that is arranged horizontally, one end 51 of the intermediate support 12 is provided with a through hole portion 56 that passes through vertically, and the other end 53 side forms a flat mounting space portion 60 on which the beams 20 can be placed, the support member 6 is inserted into the through hole portion 56 of the intermediate support 12, and the intermediate support 12 is attached to the middle part of the support member 6.

[0008] The step floor support leg according to the present invention is configured such that the support column member 6 is provided with a screw groove, and the intermediate support member 12 is attached to the support column member 6 in such a way that the height of the intermediate support member 12 can be adjusted.

[0009] The step floor support leg of the present invention uses a square tubular material with a rectangular cross-section as the intermediate support 12, consisting of an upper plate portion 50, side plate portions 52 bent downwardly from the left and right portions of the upper plate portion 50, and a lower plate portion 54, and is configured so that the horizontal width of the upper plate portion 50 is larger than the vertical width of the side plate portion 52.

[0010] The step floor support leg of the present invention is configured such that the upper plate portion 50 and the lower plate portion 54 of one end portion 51 of the intermediate support 12 each have a through hole portion 56, the support member 6 is inserted into these through hole portions 56, and the upper and lower portions of the intermediate support 12 are fastened and fixed with nut members 38, respectively.

[0011] The step floor support leg of the present invention is configured such that a support member 62 is disposed between the upper plate portion 50 and the lower plate portion 54 near one end 51 of the intermediate support 12, and has its upper end and lower end fixed to the upper plate portion 50 and the lower plate portion 54, respectively.

[0012] The step floor support leg of the present invention is configured such that the support member 62 is formed with an L-shaped cross section and a portion of the vicinity of the through hole portion 56 is surrounded by the L-shaped opening 63 of the support member 62.

[0013] The step floor support structure of the present invention is configured such that step floor support legs 2 as described above are arranged on the foundation surface 1 at three or more points on a curved line in a plan view, and ends of two of the large beams 20 are butted together in the storage space 60 of the intermediate support 12 of the step floor support leg 2, and the angle between these large beams 20 is arranged to follow the curved shape, thereby forming the base of the step floor. Effect of the Invention

[0014] According to the step floor support leg of the present invention, the intermediate support attached to the middle part of the support member is formed in a cylindrical shape arranged horizontally, one end side of the intermediate support is provided with a through hole portion that passes through from above and below, and the other end side is provided with a flat mounting space portion on which the beam can be placed, and since a configuration is adopted in which the intermediate support is attached to the middle part of the support member, the freedom of the mounting shape of the beam is increased, and the direction of the beam can be freely set in floor substructures such as curved parts, resulting in excellent convenience and ease of construction.

[0015] According to the step floor support leg of the present invention, a screw groove is formed in the support member and an intermediate support is attached to this support member so that the height of the intermediate support can be adjusted, which has the effect of allowing the height of the intermediate support to be freely set, making it very convenient.

[0016] According to the step floor support leg of the present invention, a square tubular material with a rectangular cross section consisting of an upper plate, side plate portions bent downward from the left and right sides of the upper plate, and a lower plate portion is used as the intermediate support, and the horizontal width of the upper plate portion is made larger than the vertical width of the side plate portions, which has the effect of forming a wide loading space portion on which the beams can be placed.

[0017] According to the step floor support leg of the present invention, a through hole is provided in each of the upper and lower plate portions of one end of the intermediate support, a support member is inserted through these through hole portions, the upper and lower parts of the intermediate support are fastened and fixed with nut members, and the main beam is placed on the mounting space provided in the upper plate portion of the intermediate support, which has the effect of making it easy to install the intermediate support and adjust its height.

[0018] According to the step floor support leg of the present invention, a support member is arranged between the upper and lower plate portions near one end of the intermediate support, and its upper and lower ends are fixed to the upper and lower plate portions, respectively.This has the effect of increasing the strength of the upper and lower plate portions of the intermediate support and also increasing the rigidity of the intermediate support itself.

[0019] According to the step floor support leg of the present invention, the support member is formed with an L-shaped cross section and is positioned so that the opening of the support member surrounds the vicinity of the through hole portion, thereby effectively reinforcing the strength of the upper and lower plate portions near the through hole portion of the intermediate support, thereby achieving a stronger fastening and fixing of the intermediate support.

[0020] According to the step floor support structure of the present invention, the step floor support legs are arranged at three or more points on the foundation surface, which are on a curved line in a plan view, and the ends of two large beams are butted together in the loading space of the intermediate support, and the angle between these large beams follows the curved shape to form the base of the step floor.This configuration allows the direction of the large beams to be freely set, even in curved areas, making construction easy, convenient, and easy to install. [Brief description of the drawings]

[0021] [Figure 1] 3A to 3C are diagrams showing a step floor support leg and a step floor support structure (part) according to an embodiment. [Diagram 2] 4 is an exploded view (part) of a step floor support leg according to an embodiment. [Diagram 3] 1A is a diagram showing an intermediate support of a step floor support leg, and a support member, FIG. [Figure 4] 1A and 1B are diagrams showing an intermediate receiving tool (with a built-in support member) according to an embodiment, in which (a) and (b) are side views, (c) is a cross-sectional view, and (d) is a cross-sectional view taken along line A-A'. [Diagram 5] 1 is a diagram showing a step floor support structure (part) according to an embodiment. [Figure 6] 1A and 1B are diagrams showing the manner in which the intermediate support of the step floor support leg supports the beams according to the embodiment, where (a) is a perspective view and (b) is a plan view. [Figure 7] 11A and 11B are diagrams showing a state in which step floor support legs are installed and fixed in the embodiment. [Figure 8] FIG. 2 is a diagram showing a plan view of a step floor support structure using step floor support legs according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows a step floor support leg 2 and a step floor support structure 4 according to an embodiment. The step floor support structure 4 using this step floor support leg 2 can be used as a base structure for stepped step floors built on a foundation surface 1, both indoors and outdoors in buildings such as lecture rooms, theaters, halls, event venues, and other public facilities. This step floor support structure 4 is particularly effective in places where the step floor is installed in a curved or arc-shaped configuration.

[0023] The step floor support leg 2 includes a support member 6, a base 8, an upper support 10, and an intermediate support 12, and is made entirely of steel. The step floor support structure 4 includes the step floor support leg 2, beams 20, joists 22, and floor materials (treads) such as scrap boards.

[0024] The step floor support legs 2 support the upper and lower floor underlayment materials of the step floor. These floor underlayment materials include slats 20, joists 22, and scrap boards. The upper support 10 of the step floor support legs 2 is placed on the upper part of the support member 6 and supports the slats 20 and other materials related to the upper floor underlayment material, while the middle support 12 is attached to the middle part of the support member 6 and supports the slats 20 and other materials related to the lower floor underlayment material.

[0025] In this way, the upper support 10 and intermediate support 12 of the step floor support leg 2 support the respective base materials that form the upper floor surface 24 (or tread surface) and the lower floor surface 26 (or tread surface) of the riser portion of the step floor.

[0026] The step floor support leg 2 has a support member 6 erected on the top of a base 8, an upper support device 10 disposed on the top (top) of this support member 6, and an intermediate support device 12 attached to the middle portion of the support member 6. The joists 20 and joists 22 are placed and attached to the upper support 10 and the intermediate support 12, respectively, to form the base for the floor surface (tread) of the upper step and the floor surface (tread) of the lower step of the riser of the step floor. The riser of the step floor is formed between the upper support 10 and the intermediate support 12, and the gap between the top and bottom is the riser height.

[0027] The base 8 is composed of a flat support portion 30, legs 32 which are formed by expanding obliquely downward from the left and right portions of the flat support portion 30, and fixing portions 34 which are formed horizontally outward from the lower ends of the legs 32. A retaining hole 36 through which the support member 6 is inserted is provided in the center of the support portion 30. The fixing portions 34 of the base 8 are fixed to the foundation surface 1 using fasteners such as anchors or adhesives.

[0028] The support member 6 is made of a cylindrical rod material and has a shape with a screw groove formed all over it. The support member 6 is erected on the support part 30 of the base 8 using a nut member 38, a washer 40, etc. so that the height of the support member 6 can be adjusted. A spring washer is used as the washer 40 here. In this case, a nut member 38 is screwed in advance to a portion of the support member 6 near the bottom, a washer 40 is fitted to the lower side of the nut member 38, and the support member 6 is inserted in this state into the retaining hole 36 of the base 8, and the nut member 38 is screwed from below. Then, the support portion 30 is sandwiched between the two nut members 38, and the support member 6 is fixed upright on the base 8.

[0029] Alternatively, the support member 6 can be erected by fixing a nut member to the upper part of the support portion 30 of the base 8 by welding or the like and screwing the support member 6 into the nut member so that the height can be adjusted. Also, instead of the base 8, a form in which the support member 6 is erected and fixed to a plate-shaped seating material can be adopted. Incidentally, it is also possible to bury the lower portion of the support member 6 directly into the foundation surface 1 without using the pedestal 8, and to erect the support member 6 thereon.

[0030] The upper receiver 10 has a flat disk shape overall with the periphery bent downward, for example in the shape of an upside-down dish. This upper receiver 10 has vibration-proof material 78 placed on its upper surface, and the pullers 20 are placed and held on top of this vibration-proof material 78. The vibration-proof material 78 may be attached to the upper receiver 10, and the presence of this vibration-proof material 78 can prevent creaking noises and the like between the upper receiver 10 and the pullers 20. A similar effect can be obtained for the intermediate receiver 12 by placing the vibration-proof material 78 therebetween.

[0031] A hole 44 is formed in the center of the upper receiver 10, and the upper part of the support member 6 can be inserted into this hole 44. A fixing nut 46 is welded to the lower part of the upper receiver 10 at the same central position as the hole 44. The upper receiver 10 is attached by attaching the nut member 38 and the washer 40 to the support member 6, screwing the fixing nut 46 of the upper receiver 10 from the top of the support member 6, and fastening the nut member 38 from below.

[0032] In this way, the upper support 10 is screwed to the upper part of the support member 6 via a fixing nut 46, so that the height can be adjusted and the height of the upper tread surface can be increased or decreased. The surface of the upper support 10 is flat and circular in shape, with a diameter of 85 mm in this example. In this way, the surface of the upper support 10 is large enough to allow the beams 20 to be placed thereon with ease. For example, two beams 20 can be placed on the upper support 10 at an angle (obtuse angle, etc.) and then fixed thereon.

[0033] The intermediate support 12 for the step floor support leg 2 is made of a rectangular tubular material having a rectangular cross section, which is made up of an upper plate 50, side plate portions 52 formed by bending downwards from the left and right portions of the upper plate 50, and a lower plate portion 54. Thus, the intermediate support 12 is formed in a cylindrical shape, with its axial direction oriented horizontally. Furthermore, a through hole portion 56 penetrating vertically is provided in each of the upper plate portion 50 and the lower plate portion 54 near one axial end portion 51 of the cylindrical intermediate support 12.

[0034] The intermediate receiver 12 has the support members 6 inserted through the upper and lower through-holes 56, the upper part of the upper plate portion 50 fastened with a nut member 38 and a washer 40, and the lower part of the lower plate portion 54 fastened and fixed with a washer 58 and a nut member 38. The washer 58 is made of a hollow, disc-shaped steel material. The height of the intermediate receiving device 12 can be adjusted by vertically moving the upper and lower nut members 38 screwed into the support member 6, thereby adjusting the height of the lower tread surface.

[0035] 2, the upper receiver 10 is held and fixed by a fixing nut 46, a washer 40, and a nut member 38. The intermediate receiver 12 is held and fixed by a nut member 38, a washer 40, a washer 58, and a nut member 38.

[0036] The intermediate support 12 is a tubular material with a rectangular cross-section, and when the through hole portion 56 on one axial end portion 51 is inserted into the support member 6 and attached, the other end portion 53 extends laterally, and a loading space portion 60 is formed in this portion on which the beam material 20 can be placed.

[0037] As shown in Fig. 3(a), the cylindrical intermediate support 12 is a square steel pipe with a plate thickness of 2.2 mm, with the side plate portion 52 having a vertical width (h) of 40 mm, the upper plate portion 50 having a horizontal width (w) of 80 mm, and an axial length (L) of 145 mm. The through hole portion 56 provided in the intermediate support 12 is a circular hole with a diameter of 17 mm. In this way, the intermediate support 12 is formed so that the axial length (L) is longer than the horizontal width (w) and vertical width (h), etc.

[0038] In the upper plate 50 of the intermediate receiver 12, the axial length (L1) of the mounting space 60 on the right side from the through hole 56 where the rail 20 can be placed is approximately 110 mm. Therefore, the mounting space 60 has a space in which the rail 20 (e.g., 74 cm wide) can be placed, which is 8,800 square millimeters (88 square centimeters) obtained by multiplying the length (L1) by the width of 80 mm.

[0039] In this way, the mounting space 60 of the intermediate support 12 allows the large beams 20 to be placed thereon with ample space. For example, two large beams 20 can be placed and fixed in the mounting space 60 at an angle (obtuse angle, etc.). Further, the intermediate receiving tool 12 is reinforced by interposing a support member 62 shown in FIG. 3(b) between the upper plate portion 50 and the lower plate portion 54.

[0040] FIG. 4 shows a state in which the support member 62 is disposed within the intermediate receiver 12 near one end 51 in the axial direction. The support member 62 is disposed between the upper plate portion 50 and the lower plate portion 54 near one end portion 51 of the intermediate receiving device 12, and the upper and lower ends of the support member 62 are fixed to the upper plate portion 50 and the lower plate portion 54, respectively.

[0041] The support member 62 is particularly disposed near the through hole portion 56 of the intermediate receiver 12. Specifically, the L-shaped apex 61 of the support member 62 faces one end portion 51 of the intermediate receiver 12, and the L-shaped opening 63 faces the mounting space portion 60 on the other end portion 53 side of the intermediate receiver 12. In this manner, the support member 62 is disposed in a state in which the opening 63 surrounds a part of the through hole portion 56.

[0042] The lower surface of the upper plate portion 50 of the intermediate support 12 and the upper end portion of the support member 62, and the upper surface of the lower plate portion 54 and the lower end portion of the support member 62 are fixed by welding (weld portions 64). As a result, the support member 62 provides pressure resistance reinforcement against inward (vertical) pressure applied to the upper plate portion 50 and the lower plate portion 54 of the intermediate support 12.

[0043] When the intermediate receiver 12 is fixed to the support member 6 with the nut member 38, the upper plate portion 50 and the lower plate portion 54 of the intermediate receiver 12 are tightly fastened by the nut member 38, and there is a risk that a part of one or both of the upper plate portion 50 and the lower plate portion 54 may be crushed due to the pressure. In this case, since the upper plate portion 50 and the lower plate portion 54 are connected and supported by the support member 62, there is no risk of the above-mentioned crushing. In this embodiment, a steel material having an L-shaped cross section is used as the support member 62, but it is also possible to use a steel material having a rod shape, a plate shape, a U-shaped cross section, a tube shape, an H-shape, or the like.

[0044] The intermediate support 12 here is a square tube material with a rectangular cross section, with a vertical width (h) of 40 mm and a horizontal width (w) of 80 mm, making the horizontal width (w) wider than the vertical width (h) (w>h). This is to ensure a wide mounting space 60 on the upper plate 50 of the intermediate support 12, allowing the beams 20 to be mounted with ample space. In this case, since the width (w) of the intermediate support 12 is increased, the strength of the upper plate portion 50 and the lower plate portion 54, particularly the strength (in the vertical direction) near the center, is weakened. In order to reinforce this, a support member 62 is interposed to increase the strength of the upper plate portion 50 and the lower plate portion 54.

[0045] As shown in FIG. 5, a joist 20 is placed on top of the intermediate support 12, and a floor joist 22 is placed on top of the joist 20 in a direction intersecting therewith, and these floor base materials form a floor base. The rail 20 is a steel material with a hat-shaped cross section having an upper surface 66, left and right side surfaces 67, and a flange portion 68. The rail 20 used here has a vertical width of 40 mm, a horizontal width of 40 mm, a horizontal width including the flange portion 68 of 74 mm, and a plate thickness of 1.6 mm. On the other hand, the upper plate portion 50 of the intermediate support 12 has a width of 80 mm and a length of 110 mm as the mounting space portion 60. Therefore, when a joist 20 having a width of 74 mm is placed on the mounting space portion 60 of the intermediate support 12 having a length of 110 mm, there is a margin of 36 mm (=110-74).

[0046] Therefore, the placement space 60 for fixing the large beams 20 of the intermediate support 12 is fully capable of placing, for example, two large beams 20 with their respective tip ends butted against each other. Here, the length (L1 = 110 mm) of the placement space 60 of the intermediate receiver 12 is set to approximately 1.5 times (ratio = length / width) the width (74 mm) of the spur 20. A range of approximately 1.2 to 1.8 times this ratio is considered to be appropriate for placement of the spur 20. The upper receiver 10 is also circular in shape and has a diameter of 85 mm, so that, for example, it is quite possible to place the respective ends of two beams 20 on the upper portion of it.

[0047] The joists 22 also have a hat-shaped cross section, having an upper surface 70, left and right side surfaces 72, and flanges 74. The thickness of the joists 22 is 1.2 mm, which is 0.4 mm thinner than the thickness of the beams 20 (1.6 mm), making them lighter. In addition, vibration-proofing materials 78 are placed on the bottom of both the siding members 20 and the joists 22 to prevent vibration and creaking. The vibration-proofing materials 78 are made of an elastic material such as rubber and are generally rectangular plates, with a flat plate-like portion 80 and hook-shaped retaining portions 82 formed on the left and right sides. The retaining portions 82 retain the flange portions 68 of the siding members 20 and the flange portions 74 of the joists 22, respectively.

[0048] Next, a method of assembling and installing the step floor support leg 2 will be described. Although the assembly procedure is not particularly limited, here, first, the intermediate receiver 12 is attached to the intermediate portion of the support member 6 (between the upper receiver 10 and the upper support portion 30 of the base 8). A support member 62 is attached to this intermediate receiver 12 in advance.

[0049] Then, the support member 6 is inserted from the through hole 56 of the upper plate portion 50 of the intermediate receiver 12 to the through hole 56 of the lower plate portion 54 , and the intermediate receiver 12 is fitted to the middle portion of the support member 6 . The nut member 38 is screwed onto the upper side of the upper plate portion 50 of the intermediate receiving tool 12 with a washer 40 interposed therebetween, and the nut member 38 is fastened from the underside of the lower plate portion 54 with a washer 58 interposed therebetween. In this manner, the intermediate receiving fixture 12 is fastened and attached to the support member 6 in a state in which the intermediate receiving fixture 12 is sandwiched between the nut members 38 from above and below.

[0050] In this case, the washer 58 has a larger surface area than the washer 40, and therefore effectively and firmly supports the intermediate receiving device 12 over a large area. The intermediate support 12 can be positioned in the middle of the support member 6 so as to be height-adjustable by adjusting the upper and lower nut members 38, and can be attached to a predetermined position of the support member 6. For example, the intermediate support 12 is attached to the corresponding position of the support member 6, which is located approximately the height of the riser below the upper support 10.

[0051] Next, the lower portion of the support member 6 is fixed to the support portion 30 of the base 8. In this case, the nut member 38 and the washer 40 are attached to the support member 6 first, the support member 6 is inserted from the bottom into the retaining hole 36 of the support portion 30, and the nut member 38 is attached from below and fastened, thereby fixing the support member 6 upright on the base 8.

[0052] Finally, the upper receiver 10 is attached to the top of the support member 6. A fixing nut 46 is previously fixed to the back surface of the upper receiver 10 by welding or the like. Then, the nut member 38 is screwed in advance near the top of the support member 6, a washer 40 is placed on the top of the nut member 38, the fixing nut 46 of the upper receiver 10 is screwed from the top of the support member 6, and the nut member 38 is fastened from below to fix the upper receiver 10 to the support member 6.

[0053] In this case, the upper end of the support member 6 can pass through the hole 44 of the upper receiver 10 and protrude above the upper receiver 10, and the height of the upper receiver 10 relative to the support member 6 can be adjusted. This allows the height of the support member 6 relative to the base 8 of the step floor support leg 2 to be adjusted, the height position of the intermediate support member 12 relative to the support member 6 can also be freely adjusted, and the height of the upper support member 10 relative to the support member 6 can also be adjusted. The step floor support leg 2 can have the joists 20 and floor joists 22, etc., placed and fixed on the upper support 10 and intermediate support 12, respectively.

[0054] 6(a) and (b) show the state in which the rail 20 is placed on the loading space 60 of the intermediate support 12. As shown in the figures, the loading space 60 of the intermediate support 12 has a flat upper surface and is large enough to allow the rail 20 to be placed thereon with ease. As a result, the mounting space 60 of the intermediate support 12 allows the two pullers 20 to be mounted at a specified angle (such as an obtuse angle) with the pullers 20 butted against each other. Each puller 20 placed on the intermediate support 12 has vibration-proof materials 78 interposed between it and the intermediate support 12, and each flange portion 68 of the puller 20 is fixed to the intermediate support 12 using a screw (such as a sill tap).

[0055] As a result, for example, when forming a step floor at a location with a curved corner, the step floor support legs 2 can be placed at multiple locations on the curved line and the beams 20 can be installed continuously and at an angle between adjacent step floor support legs 2, allowing the beams 20 to be arranged in a configuration close to a curved shape. Furthermore, by using the step floor support legs 2, it is possible to build a step floor structure consisting of curved and stepped upper and lower floor surfaces, and construction of such a step floor structure can be carried out easily and effectively.

[0056] It is also possible to place one beam 20 through the entire structure when placing the beams 20 between multiple step floor support legs 2. This eliminates the need to cut the beams 20 to a length that corresponds to the pitch between the step floor support legs 2, which also contributes to improved workability. The upper support 10 can also accommodate two beams 20 placed at a specified angle on its upper surface. Therefore, by using the step floor support legs 2, the upper support 10 can be used to form the base for the upper floor surface of the step floor, and the intermediate support 12 can be used to form the base for the lower floor surface, even in curved areas.

[0057] 7, when installing and fixing the step floor support leg 2 to the foundation surface 1, for example, anchor members 84 (concrete screws, nails, etc.) are used. Holes are provided in the fixing parts 34 of the base 8 of the step floor support leg 2 beforehand, and the anchor members 84 are inserted through these holes and driven into the foundation surface 1 to fix the fixing parts 34 in two places to the foundation surface 1, and the step floor support leg 2 is installed.

[0058] Next, a construction example of the step floor support structure 4 using the step floor support legs 2 will be described. Figure 8 shows the plan of the step floor support structure 4 where the boundary of the step floor is curved into an L shape. As shown in the figure, here, an upper floor surface (e.g., L-shaped) and a lower floor surface (also L-shaped) are formed on the foundation surface 1 of a building. The corners of these L shapes are curved, and here the step floor of the step floor support structure 4 consisting of floor surfaces with a step is constructed. In the figure, the location where the floor joists 22a (22) shown by solid lines are arranged is the upper floor surface 24, and the location where the floor joists 22b (22) shown by dotted lines are arranged is the lower floor surface 26.

[0059] The boundary between the upper floor surface 24 and the lower floor surface 26 is curved (arc-shaped). For this reason, the step floor support legs 2 are placed at several points (four points in this case) on the curved line that describes the curved shape. In this case, if the base surface 1 is uneven, the height adjustment function of the step floor support legs 2 is used to adjust it to a constant height.

[0060] For the step floor support legs 2, rails 20a (20) are placed on the upper receivers 10 as base materials for the upper floor surface 24. Here, three rails 20a (20) are bridged between the upper receivers 10 of each step floor support leg 2. For each of the two step floor support legs 2 in the middle of the curved shape, the two rails 20a are placed on the upper receivers 10 at a specified angle (angle that follows the curved shape) with the two rails 20a butted against each other.

[0061] Similarly, the large pullers 20b (20) serving as base material for the lower floor surface 26 are placed on the intermediate receivers 12 of the step floor support legs 2. The three large pullers 20b (20) are then spanned between the intermediate receivers 12 of each step floor support leg 2. For each of the two step floor support legs 2 in the middle, the two large pullers 20b are placed in the mounting space 60 of the intermediate receiver 12 with the two pullers 20b butted against each other at a specified angle (approximately the same angle as the upper receiver 10).

[0062] Each of the pullers 20a placed on the upper receiver 10 has vibration-proofing material 78 interposed between them and the upper receiver 10, and each flange portion 68 of the pullers 20a is fixed to the upper receiver 10 with a screw (such as a silt tap). When two pullers 20 are butted together on the upper receiver 10, each puller 20 is fixed with a screw. Similarly, the pullers 20b placed on the intermediate receiver 12 have vibration-proofing material 78 interposed between them and are fixed to the mounting space portion 60 of the intermediate receiver 12 with a screw.

[0063] Although not shown in the figure, support legs (with heights matching the height of the upper tier) with only upper supports 10 attached are placed as the base material for the upper floor surface 24, and similar support legs (with heights matching the height of the lower tier) are used for the base material for the lower floor surface 26, and joists 20 are placed on each. Then, joists 22 (22a, 22b) are placed between the joists 20 in a direction intersecting the joists 20. Each joist 22 is fixed to the upper part of the joists 20 using a screw (such as a sill tap).

[0064] Furthermore, a scrap board (such as a plywood board) is attached to the top of the joists 22. The scrap board is fixed to the top surface 70 of the joists 22 (22a, 22b) using screws (such as tapping screws). A finishing material is placed on top of the scrap board.

[0065] Therefore, according to the above embodiment, in places where the boundary of the step floor of a room or the like is curved, the joists related to the floor base can be arranged in any direction, so that the base of the step floor can be effectively constructed, which is convenient and has the effect of being excellent in workability. Also, when constructing a step floor support structure using the step floor support legs, the step floor can be completed by assembling each component on site mainly using screws, so the work can be done quickly and easily, and it is also excellent in productivity and workability. [Explanation of symbols]

[0066] 1 Foundation surface 2-tier floor support legs 4-tier floor support structure 6 Support members 10 Upper receiver 12 Intermediate support 20 Beam 22 Joist material 51 One end 53 Other end 56 Through hole section 60 Placement space 62 Support material

Claims

1. A step floor support leg that supports the upper and lower floor sub-materials of the step floor, A support member erected on a foundation surface; an upper support device that is arranged on an upper portion of the support member and on which a joist material for the upper floor base material can be placed; and an intermediate support attached to an intermediate portion of the support member and capable of supporting a beam member related to the lower floor base material, The intermediate support is formed in a tubular shape arranged horizontally, and a through hole portion that passes vertically through one end of the intermediate support is provided, and a flat loading space portion on which the beam material can be placed is formed on the other end. The support member is inserted through a through-hole portion of the intermediate support member, and the intermediate support member is attached to an intermediate portion of the support member, The intermediate support has an upper plate portion and a lower plate portion, A step floor support leg characterized in that a support member is disposed between the upper plate portion and the lower plate portion near one end of the intermediate support, the upper end and the lower end of which are fixed to the upper plate portion and the lower plate portion, respectively.

2. The step floor support leg of claim 1, characterized in that the intermediate support device is a square tubular material with a rectangular cross-section consisting of an upper plate portion, side plate portions bent downward from the left and right sides of the upper plate portion, and a lower plate portion, and the horizontal width of the upper plate portion is made larger than the vertical width of the side plate portions.

3. A step floor support leg as described in claim 1 or 2, characterized in that the upper and lower portions of the intermediate support are each fastened and fixed with a nut member.

4. 3. The step floor support leg according to claim 1, wherein the support member is formed to have an L-shaped cross section, and is disposed so that a portion of the vicinity of the through hole is surrounded by the L-shaped opening of the support member.

5. The step floor support legs according to any one of claims 1 to 4 are disposed at three or more points on a curved line on the base surface, A step floor support structure characterized in that the ends of two of the beams are butted together in the storage space of the intermediate support of the step floor support leg, and the angle between these beams is arranged to follow the curved shape, thereby forming a base for the step floor.

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