Construction method for support base and main beam

Abstract

To reduce the workload when installing long materials. [Solution] The construction support stand 1 comprises a main body 2 formed by connecting a flat first member 3 and a flat second member 4, which is positioned intersecting the first member 3, in an X-shape in plan view. A concave receiving portion 22 is provided on the upper part of the main body 2. The receiving portion 22 is provided to include first notches 32 and 42 formed in the first member 3 and the second member 4, respectively, and the intersection portion 21 of the first member 3 and the second member 4.

Description

Technical Field

[0001] The present disclosure relates to a construction auxiliary stand and a large beam construction method using the same.

Background Art

[0002] As a floor structure for the first floor of a building such as a house, a floor assembly composed of large beams and floor ties may be applied. For example, in the floor structure of Patent Document 1, a ground concrete is provided between opposing foundations that form the outer periphery of the building, a plurality of steel large beams are installed between the foundations, and the steel large beams are supported by steel ties erected on the ground concrete. A floor slab is laid on these steel large beams via joists and heat insulating materials.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When erecting floor ties on the ground concrete, the work is carried out with the floor ties pre-attached to the large beams. In the conventional construction method, with the attachment surface of the floor ties on the large beams facing upward, the attachment work of a plurality of floor ties is performed with the large beams placed on the ground concrete. In order to attach the floor ties to the large beams placed on the ground concrete, the operator has to bend down, which is not a comfortable working posture and places a burden on the waist and knees.

[0005] In addition, the large beams are arranged with their longitudinal ends close to the foundations, and the total length can reach up to 4 m at most. After attaching the floor ties, such large beams with such a length have to be lifted and turned upside down with a plurality of floor ties attached, and then the floor ties have to be installed on the ground concrete. This makes it difficult to handle the large beams and there is also a risk of the operator getting injured.

[0006] Furthermore, at construction sites, underfloor piping is often laid on the concrete slab before the main beams are installed, which can make it difficult to secure sufficient workspace. As a result, the main beams must be temporarily placed away from the installation location, and the installation of multiple floor supports must be carried out in that location. After the installation is complete, the main beams, which now have multiple floor supports attached and are quite heavy, must be transported to their designated location on the concrete slab, which is time-consuming and places a heavy burden on the workers.

[0007] This disclosure has been made in view of the above-mentioned problems, and its purpose is to provide a construction support stand and a method for constructing main beams using the same that can improve at least one of the following: reducing the burden on workers, improving the work efficiency of floor joist installation work, and improving the workability of main beam installation. [Means for solving the problem]

[0008] A solution of the present disclosure for achieving the above objective is a construction support stand for supporting a long material having a rectangular cross-section, comprising a main body in which a flat plate-shaped first member and a flat plate-shaped second member arranged intersecting the first member are joined in an X-shape in plan view, wherein a concave receiving portion is provided on the upper part of the main body, and the receiving portion is provided so as to include a first notch formed in the first member and the second member, and the intersection of the first member and the second member.

[0009] Furthermore, in the construction support stand, it is preferable that the receiving portion is provided in a side view taken from a direction that equally divides the intersection angle, which is the angle between the first member and the second member, so as to have a semicircular shape that is recessed downwards.

[0010] Furthermore, in the construction support stand, it is preferable that the long material has a rectangular cross-section with diagonal length L, while the receiving portion is provided to have a semicircular shape with a diameter R corresponding to the length L in a side view.

[0011] Furthermore, in the aforementioned construction support stand, the intersection angle may be a right angle.

[0012] Furthermore, in the construction support stand, it is preferable that the first notch is provided in a rounded shape.

[0013] Furthermore, in the construction support stand, a recess that opens downward is provided at the lower part of the main body, and it is preferable that the recess includes a second notch that is curved or rectangular and provided in the first member and the second member, respectively, and the intersection of the first member and the second member.

[0014] Furthermore, in the construction support stand, it is preferable that the first member has a first slit that is continuous with the first notch and extends vertically, the second member has a second slit that is open downward and extends vertically, and the main body can be manufactured by fitting the first slit and the second slit together.

[0015] Furthermore, a method for constructing a main beam using the construction support stands described above also falls within the scope of the technical concept of this disclosure. Specifically, the method for constructing a main beam is characterized by including the steps of: setting up a plurality of the construction support stands; placing the main beam across the receiving portions of the construction support stands; attaching floor joists to the main beam; rotating the main beam around its axis on the receiving portions so that the mounting surfaces of the floor joists face downwards; and removing the construction support stands and fixing the floor joists to the floor surface. [Effects of the Invention]

[0016] According to this disclosure, it is possible to reduce the workload, at least when installing long materials. [Brief explanation of the drawing]

[0017] [Figure 1] This is a perspective view showing a construction support stand according to Embodiment 1 of this disclosure. [Figure 2] These are side views showing the first and second components that make up the main body of the construction support stand. [Figure 3] It is a plan view showing a construction auxiliary stand. [Figure 4] It is a side view showing the construction auxiliary stand shown in FIG. 1 as viewed in the direction of arrow A. [Figure 5] It is a side view showing the construction auxiliary stand shown in FIG. 1 as viewed in the direction of arrow B. [Figure 6] It is a perspective view showing one step of a construction method of a large steel draw using a construction auxiliary stand. [Figure 7] It is a perspective view showing one step of a construction method of a large steel draw using a construction auxiliary stand. [Figure 8] It is an explanatory view schematically showing one step of the construction method of the large steel draw shown in FIG. 7 as viewed from the material axis direction. [Figure 9] It is an explanatory view schematically showing one step of the construction method of the large steel draw using a construction auxiliary stand as viewed from the material axis direction. [Figure 10] It is a side view showing the construction auxiliary stand according to Embodiment 2. [Figure 11] It is a side view showing another example of the construction auxiliary stand according to Embodiment 2.

Mode for Carrying Out the Invention

[0018] The construction auxiliary stand and the construction method of the large draw according to the embodiment of the present disclosure will be described with reference to the drawings. In addition, the common components throughout Embodiments 1 and 2 are denoted by common reference numerals, and duplicate explanations are omitted.

[0019] (Embodiment 1) FIG. 1 is a perspective view showing the construction auxiliary stand 1 according to Embodiment 1, and FIG. 2 is a side view showing the first member 3 and the second member 4 constituting the construction auxiliary stand 1, respectively.

[0020] The construction support stand 1 is used in conjunction with other construction support stands 1 when working on long materials that make up a building, and multiple stands are arranged side by side. As shown in Figure 1, the construction support stand 1 according to Embodiment 1 has a main body 2 in which a flat plate-shaped first member 3 and a flat plate-shaped second member 4 arranged in a direction intersecting the first member 3 are connected in an X shape in plan view.

[0021] The first member 3 and the second member 4 constituting the main body 2 are flat plate-shaped members having a predetermined thickness, formed from wood-based board material such as plywood, resin board material, etc. As shown in Figure 2, the first member 3 is provided with a first slit 31 and notches (first notch 32, second notch 33) provided at the top and bottom. The second member 4 is provided with a second slit 41 and notches (first notch 42, second notch 43) provided at the top and bottom.

[0022] The length H1 from the upper end 34 to the lower end 35 of the first member 3 is equal to the length H2 from the upper end 44 to the lower end 45 of the second member 4. In the first member 3 and the second member 4, the lower ends 35 and 45 are the parts that are installed on the concrete floor. Lengths H1 and H2 correspond to the height of the construction support stand 1. Assuming work is performed in a standing position, the height of the construction support stand 1 is preferably, for example, 450 mm to 600 mm. The first member 3 and the second member 4 are of similar size, and when superimposed, their upper and lower notches overlap.

[0023] The first slit 31 of the first member 3 extends vertically from the center in the width direction. The first slit 31 is also provided in the upper half of the first member 3, within a range of 1 / 2H1 from the upper end 34.

[0024] The second slit 41 of the second member 4 also extends vertically from the center in the width direction. The second slit 41 is provided in the lower half of the second member 4, within a range of 1 / 2H2 from the lower end 45. The main body 2 can be manufactured by fitting these first slits 31 and second slits 41 together and combining the first member 3 and the second member 4.

[0025] In the first member 3, the first notch 32 is provided in a rounded shape on the upper part of the first member 3. A first slit 31 extending vertically is continuously formed in the first notch 32. The first notch 42 of the second member 4 is also provided in a rounded shape, similar to the first notch 32 of the first member 3.

[0026] Furthermore, the first member 3 and the second member 4 are provided with second notches 33 and 43 at their lower ends 35 and 45, respectively. The second notch 33 is provided in a rounded shape at the lower part of the first member 3. The second notch 43 of the second member 4 is also provided in a rounded shape, similar to the second notch 33 of the first member 3. A second slit 41 is continuously formed in the second notch 43, opening downwards and extending vertically.

[0027] As shown in Figure 1, the first member 3 and the second member 4 are joined in an X-shape in plan view, so that a receiving portion 22 is provided on the upper part of the main body 2. The receiving portion 22 is an open, curved recess that is recessed downwards as a whole, formed by the first notch 32 of the first member 3 and the first notch 42 of the second member 4. The intersection 21 of the first member 3 and the second member 4 is positioned in the center of the receiving portion 22.

[0028] Figure 3 is a plan view showing the construction support stand 1. Figures 4 and 5 are side views of the construction support stand 1; Figure 4 shows the construction support stand 1 shown in Figure 1 viewed in the direction of arrow A, and Figure 5 shows it viewed in the direction of arrow B shown in Figures 1 and 3.

[0029] As shown in Figure 3, in the construction support base 1, the first member 3 and the second member 4 are joined in an X-shape (cross shape) in plan view at an intersection angle θ. In the construction support base 1 according to the example form, the intersection angle θ, which is the angle between the first member 3 and the second member 4, is a right angle or approximately a right angle. That is, in plan view, the first member 3 and the second member 4 are combined so as to be perpendicular. The receiving portion 22 is provided to include the first notches 32 and 42 provided in the first member 3 and the second member 4, respectively, and the intersection portion 21 of the first member 3 and the second member 4.

[0030] As shown in Figure 4, the receiving portion 22 is provided in a rounded shape that opens upwards to the main body portion 2 when viewed from the direction directly facing the first member 3 or the second member 4 (direction A). Also, as shown in Figure 5, the receiving portion 22 is provided in a semicircular shape that is recessed downwards when viewed from the direction that equally divides the intersection angle θ between the first member 3 and the second member 4 (direction B). In this case, when viewed from the side in direction B, the receiving portion 22 is provided to form a semicircular shape with a diameter R.

[0031] The lower part of the main body 2 is provided with a recess 23 that opens downwards. The recess 23 is formed by the curved second notches 33 and 43 provided in the first member 3 and the second member 4, respectively, and includes the intersection (lower intersection) where the first member 3 and the second member 4 intersect. The second notches 33 and 43 are provided with a curved shape with a smaller curvature than the first notches 32 and 42. The recess 23 of the main body 2 is preferably provided with a maximum height of 130 mm to 160 mm from the lower ends 35 and 45, taking into consideration the size of pipes and the like on the concrete floor.

[0032] Figures 6 to 9 show one step in the construction method of a steel beam 5 using the construction support stand 1. Figures 6 and 7 are perspective views, and Figures 8 and 9 are schematic explanatory diagrams showing the steel beam 5 and steel support 6 as viewed from the direction of the material axis of the steel beam 5. Note that the steel beam 5 is an example of a beam, and the steel support 6 is an example of a floor support.

[0033] As described above, the construction support stand 1 can be used, for example, to fix multiple steel posts 6 to a long steel beam 5. For example, as shown in Figure 6, multiple construction support stands 1 are used by arranging them at intervals on a flat surface such as a concrete slab. The steel beam 5 is positioned by placing it across the receiving portion 22 of the construction support stand 1 with the surface to which the steel posts 6 are attached (mounting surface) facing upwards.

[0034] At the construction site of the steel beams 5 and steel supports 6, if there are pipes 7 already laid on the concrete slab, the construction support stand 1 can be installed so as to straddle the pipes 7 in the recess 23, and the steel beams 5 can be positioned above the pipes 7 via the support portion 22. The construction support stand 1 is installed so that the first member 3 and the second member 4 that constitute the main body 2 intersect with the direction of extension of the pipes 7 (in this case, the X direction in the figure).

[0035] In conventional construction methods, the steel beam 5 was placed directly on the concrete slab with the mounting surface of the steel support 6 facing upwards, and the installation of multiple steel support 6 was carried out with the beam 5 in this position. In contrast, in the construction method according to the example, as shown in Figure 7, the steel beam 5 is placed on the receiving parts 22 of multiple construction support bases 1, and the installation of multiple steel support 6 can be carried out with the beam 5 in this position.

[0036] As described above, the height of the construction support stand 1 is set to a height that accommodates working in a standing position, so that work can be carried out in a comfortable posture without bending over when working on the steel beam 5 placed on the support section 22. Furthermore, even if the pipes 7 have been laid on the concrete floor prior to the construction work on the steel beam 5, the construction support stand 1 can be set up straddling the pipes 7, and the steel beam 5 can be positioned in the desired location to proceed with the work.

[0037] As shown in Figure 7, the steel support 6 is composed of, for example, a fixing plate 61, a receiving plate 62, and a shaft portion 63 that is provided between the fixing plate 61 and the receiving plate 62 so as to be adjustable in length. The receiving plate 62 is fixed to the steel beam 5 by screws or the like. The fixing plate 61 is fixed to the floor concrete and becomes a member that supports the steel beam 5 on the floor concrete.

[0038] The steel beam 5 is a long, hollow member with a rectangular cross-section, such as a square or rectangular shape. As shown in Figure 8, the steel beam 5 has a rectangular cross-section with a diagonal length L, while the receiving portion 22 of the construction support base 1 is a recess formed to have a semicircular shape with a diameter R corresponding to the length L when viewed from the side in direction B. Here, it is preferable that the diameter R of the receiving portion 22 is equal to the length L of the diagonal of the rectangular cross-section of the steel beam 5, or is the length L plus a margin for rotation. For example, if the steel beam 5 has a square cross-section and the length L of the diagonal is 104 mm, it is preferable that the diameter R of the receiving portion 22 be 105 mm to 117 mm.

[0039] After attaching multiple steel supports 6 to the steel beam 5, the steel beam 5 on the support portion 22 is rotated around the material axis, as shown in Figure 9. The support portion 22 is provided in a semicircular shape with a diameter R when viewed from the side from direction B parallel to the material axis direction X, so that the steel beam 5 can be rotated smoothly.

[0040] By rotating the steel beam 5, the steel support 6 can also be rotated so that the fixing plate 61 is positioned below and the support plate 62 is positioned above. Although the steel beam 5 has considerable weight due to the multiple steel support 6 fixed to it, it is supported by the construction support stand 1, so the rotation of the steel beam 5 can be easily performed by a single worker.

[0041] Next, by removing the multiple construction support bases 1 from below the steel beam 5, the fixing plate 61 can be placed on the concrete slab, resulting in a state where the steel beam 5 is positioned on multiple steel supports 6. Furthermore, the fixing plate 61 of each steel support 6 is pinned to the concrete slab. This creates a structure in which the steel beam 5 is supported by steel supports 6 erected on the concrete slab.

[0042] Once the construction of the steel beam 5 using the construction support stand 1 is complete, the connection between the first member 3 and the second member 4 of the construction support stand 1 can be detached, allowing the first member 3 and the second member 4 to be disassembled individually, making them compact for transport and storage.

[0043] (Embodiment 2) The construction support stand of this disclosure is not limited to the embodiment shown in Embodiment 1, but can be configured in various other ways. The receiving portion 22 and the recess 23 are also not limited to the configuration shown in Embodiment 1, but can be provided in various configurations.

[0044] Figure 10 is a side view showing the construction support stand 1a according to Embodiment 2, and is equivalent to Figure 4 when viewed from direction A. For example, as shown in Figure 10, the first member 3a and the second member 4a constituting the main body 2a may be formed from a substantially trapezoidal flat plate-like member in which the length of the lower base is longer than the length of the upper base.

[0045] In this case, the recess 25 provided at the bottom of the construction support base 1a may be formed by a rectangular notch rather than a rounded shape. The receiving portion 24 at the top of the construction support base 1a is preferably provided in the same manner as in Embodiment 1, so as to form a semicircular shape that is recessed downward when viewed from the side in direction B (see Figure 3) which divides the intersection angle equally.

[0046] Figure 11 is a side view showing a construction support stand 1b according to yet another example of Embodiment 2, and is equivalent to Figure 4 when viewed from direction A. As shown in the figure, the construction support stand 1b may be formed using substantially trapezoidal flat plate members, where the length of the lower base is shorter than the length of the upper base, as the first member 3b and second member 4b constituting the main body 2b. The main body 2b may be provided with a receiving portion 26 and a recess 27, similar to Embodiment 1.

[0047] With the construction support stands 1, 1a, and 1b configured as described above, and the construction method for joists using them, the burden on workers when installing long materials can be greatly reduced, the work efficiency when installing floor joists can be improved, and the workability of installing joists can be improved.

[0048] Furthermore, the long members used for construction with the construction support stands 1, 1a, and 1b are not limited to the steel beams 5 exemplified, but can be applied to various long members that make up a building. Also, the first notches of the first members 3, 3a, and 3b and the second members 4, 4a, and 4b that make up the construction support stands 1, 1a, and 1b are not limited to being provided in a rounded shape, but may be provided in other shapes depending on the cross-sectional shape of the long member.

[0049] This disclosure is not limited to the embodiments described above, and various modifications are possible without departing from the technical essence thereof. All technical matters included in the technical idea described in the claims are subject to this disclosure. The embodiments described above are preferred examples, but various modifications can be realized from the disclosed content, and such modifications are also included in the technical scope described in the claims.

[0050] The following additional information is disclosed regarding the technical details described in the embodiments described above.

[0051] (Note 1) A construction support stand for supporting long members with a rectangular cross-section, The device comprises a main body formed by joining a flat first member and a flat second member, which is positioned intersecting the first member, in an X-shape in plan view. A concave receiving portion is provided at the upper part of the main body. The construction support stand is characterized in that the receiving portion is provided so as to include a first notch formed in the first member and the second member, and an intersection of the first member and the second member.

[0052] (Note 2) The construction support stand described in Appendix 1, The construction support stand is characterized in that the receiving portion is provided in a side view taken from a direction that equally divides the intersection angle, which is the angle between the first member and the second member, and has a semicircular shape that is recessed downwards.

[0053] (Note 3) The construction support stand described in Appendix 2, In the construction support stand according to claim 2, The aforementioned long material has a rectangular cross-section where the diagonal is of length L, The construction support stand is characterized in that the receiving portion is provided to form a semicircular shape with a diameter R corresponding to the length L in a side view.

[0054] (Note 4) A construction support stand as described in Appendix 2 or 3, A construction support stand characterized in that the aforementioned intersection angle is a right angle.

[0055] (Note 5) In the construction support stand described in any of the appendices 1 to 4, The construction support stand is characterized in that the first notch portion is provided in a rounded shape.

[0056] (Note 6) A construction support stand as described in any of Appendix 1 to 5, The lower part of the main body is provided with a recess that is open downwards. The construction support stand is characterized in that the recess includes a second notch that is curved or rectangular and provided in the first member and the second member, respectively, and the intersection of the first member and the second member.

[0057] (Note 7) In the construction support stand described in any of the appendices 1 to 6, The first member is provided with a first slit that is continuous with the first notch and extends vertically, The second member is provided with a second slit that is open downwards and extends vertically, The main body is characterized in that it can be manufactured by fitting the first slit and the second slit together.

[0058] (Note 8) A method for constructing a main beam using a construction support stand described in any of the appendices 1 to 7, The process of installing multiple construction support stands, The process of placing the main beam across the support portion of the construction support stand, The process of attaching floor joists to the aforementioned main beams, A step of rotating the main beam around the material axis on the receiving portion so that the mounting surface of the floor joist faces downward, A method for constructing a main beam, characterized by including the steps of removing the aforementioned construction support stand and fixing the floor joist to the floor surface. [Explanation of symbols]

[0059] 1, 1a, 1b Construction support stand 2, 2a, 2b Main body 21 Intersection 22 Receiving part 23 Recess 3, 3a, 3b 1st member 31. First Slit 32 1st notch 33 Second notch 4, 4a, 4b Second member 41. Second Slit 42 1st notch 43 Second notch 5 Steel Ohiki (long material) 6 Steel bundle 61 Fixing plate 62 Receiving plate 63 Shaft 7 Piping θ intersection angle

Claims

1. A construction support stand for supporting long members with a rectangular cross-section, The device comprises a main body formed by connecting a flat first member and a flat second member, which is positioned intersecting the first member, in an X-shape when viewed from above. A concave receiving portion is provided at the upper part of the main body. The construction support stand is characterized in that the receiving portion is provided so as to include a first notch formed in the first member and the second member, and an intersection of the first member and the second member.

2. In the construction support stand according to claim 1, The construction support stand is characterized in that the receiving portion is provided in a side view taken from a direction that equally divides the intersection angle, which is the angle between the first member and the second member, and has a semicircular shape that is recessed downwards.

3. In the construction support stand according to claim 2, The aforementioned long material has a rectangular cross-section where the diagonal is of length L, The construction support stand is characterized in that the receiving portion is provided in a semicircular shape with a diameter R that is the same size as the length L in a side view, or the length L plus a margin for rotation.

4. In the construction support stand according to claim 2, A construction support stand characterized in that the aforementioned intersection angle is a right angle.

5. In the construction support stand according to claim 1, The construction support stand is characterized in that the first notch portion is provided in a rounded shape.

6. In the construction support stand according to claim 1, The lower part of the main body is provided with a recess that is open downwards. The construction support stand is characterized in that the recess includes a second notch that is curved or rectangular and provided in the first member and the second member, respectively, and the intersection of the first member and the second member.

7. In the construction support stand according to claim 1, The first member is provided with a first slit that is continuous with the first notch and extends vertically, The second member is provided with a second slit that is open downwards and extends vertically, The main body is characterized in that it can be manufactured by fitting the first slit and the second slit together.

8. A method for constructing a main beam using a construction support stand according to any one of claims 1 to 7, The process of installing multiple construction support stands, The process of placing the main beam across the support portion of the construction support stand, The process of attaching floor joists to the aforementioned main beams, A step of rotating the main beam around the material axis on the receiving portion so that the mounting surface of the floor joist faces downward, A method for constructing a main beam, characterized by including the steps of removing the aforementioned construction support stand and fixing the floor joist to the floor surface.

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