Frame, method for erecting building material, method for manufacturing reinforced concrete column, and method for manufacturing structure

Abstract

To improve the safety of a worker when building materials are erected.SOLUTION: A frame is used for erecting a building material, and includes a support part and a connection part. The support portion has a surface facing the one side in the first direction. A central portion of the surface in a second direction intersecting the first direction protrudes further toward the one side in the first direction than end portions of the surface in the second direction. The surface is inclined with respect to the first direction such that an inclination with respect to the second direction gradually decreases from the end portion toward the central portion. The connection part is located on the other side in the first direction with respect to the support part and is connected to an end of the building material.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a frame, a method for erecting building materials, a method for manufacturing a reinforced concrete column, and a method for manufacturing a structure. [Background technology]

[0002] BACKGROUND ART Conventionally, a method for erecting steel columns (building materials) using a lifting device such as a crane has been disclosed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-156060 Summary of the Invention [Problem to be solved by the invention]

[0004] When erecting building materials, the safety of workers may be compromised if the building materials shake when they are lifted off the surface on which they are placed, such as the ground surface.

[0005] This specification discloses a technique that can solve the above-mentioned problems. [Means for solving the problem]

[0006] The technology disclosed in this specification can be realized, for example, in the following forms.

[0007] (1) The rack disclosed in this specification is a rack used for erecting building materials, and includes a support portion and a connection portion. The support portion has a surface facing one side in a first direction. A central portion of the surface in a second direction intersecting the first direction protrudes further toward the one side in the first direction than an end portion of the surface in the second direction. The surface is inclined with respect to the first direction such that the inclination with respect to the second direction gradually decreases from the end portion toward the central portion. The connection portion is located on the other side of the support portion in the first direction and is connected to an end portion of the building material. This rack suppresses shaking of the building material when the building material is lifted off the surface on which it is placed, such as the ground surface, thereby improving the safety of workers when erecting the building material.

[0008] (2) In the above-described rack, the surface may be arc-shaped when viewed in a third direction that intersects with both the first direction and the second direction. This configuration more effectively improves the safety of workers when erecting building materials.

[0009] (3) In the above-described rack, the construction material may be a column reinforcing bar that is assembled on the ground. According to this configuration, the safety of workers when erecting the column reinforcing bar is improved.

[0010] (4) In the above-mentioned frame, the connection part may be formed of a pipe material, and the connection part may be connected to the column reinforcing bar by accommodating the column reinforcing bar inside the pipe material. According to this configuration, the column reinforcing bar and the frame can be connected by accommodating the column reinforcing bar inside the pipe material, so that the column reinforcing bar can be erected in a simple manner.

[0011] (5) In the above-described gantry, the connection portion may be connected to the column reinforcing bar so as to be slidable relative to the column reinforcing bar. According to this configuration, when the column reinforcing bar is erected, the gantry separates from the column reinforcing bar due to its own weight, so that subsequent work after erecting the column reinforcing bar can proceed smoothly.

[0012] (6) A method for erecting a building material disclosed in this specification includes connecting a rack to an end of the building material on one side in a first horizontal direction and lifting the end of the building material on the other side in the first horizontal direction. The rack includes a support part and a connection part. The support part has a surface facing the one side in the first horizontal direction in a connected state in which the rack is connected to the building material. In the connected state, the vertical center of the surface protrudes to the one side in the first horizontal direction more than the lower end of the surface in the vertical direction. In the connected state, the surface is inclined with respect to the first horizontal direction so that the inclination with respect to the vertical direction gradually decreases from the end toward the center. In the connected state, the connection part is located on the other side in the first horizontal direction with respect to the support part and is connected to the one end of the building material. According to this method for erecting building materials, when erecting the building materials, shaking of the building materials is suppressed when the building materials are separated from the surface on which they are placed, such as the ground surface, thereby improving the safety of workers when erecting the building materials.

[0013] (7) In the method for erecting a building material, in the connected state, the surface may be arc-shaped when viewed in a second horizontal direction that intersects with both the first horizontal direction and the up-down direction. This configuration more effectively improves the safety of workers when erecting the building material.

[0014] (8) In the method for erecting building materials, the building materials may be column reinforcing bars that have been assembled on the ground. This configuration improves the safety of workers when erecting the column reinforcing bars.

[0015] (9) In the method for erecting building materials, the connection part may be formed of a pipe material, and the connection part may be connected to the column reinforcing bar by accommodating the column reinforcing bar inside the pipe material. According to this configuration, the column reinforcing bar and the frame can be connected by accommodating the column reinforcing bar inside the pipe material, so that the column reinforcing bar can be erected in a simple manner.

[0016] (10) In the method for erecting building materials, the connecting portion may be connected to the column reinforcing bar so as to be slidable relative to the column reinforcing bar. According to this configuration, when the column reinforcing bar is erected, the weight of the frame separates the frame from the column reinforcing bar, so that subsequent work after erecting the column reinforcing bar can proceed smoothly.

[0017] (11) The method for manufacturing a reinforced concrete column disclosed in this specification involves erecting the column reinforcing bars using the method for erecting building materials described in (8) above, and pouring concrete to cover the column reinforcing bars. This method for manufacturing a reinforced concrete column improves the safety of workers when erecting the column reinforcing bars.

[0018] (12) A method for manufacturing a structure disclosed in this specification includes manufacturing a reinforced concrete column by the method for manufacturing a reinforced concrete column described in (11) above, and placing a steel beam above the concrete in the reinforced concrete column. This method for manufacturing a structure improves the safety of workers when erecting column reinforcing bars in the manufacturing of a reinforced concrete column.

[0019] The technology disclosed in this specification can be realized in various forms, such as a mounting frame, a method for erecting building materials, a method for manufacturing reinforced concrete columns, a method for manufacturing structures, etc. [Brief explanation of the drawings]

[0020] [Figure 1] An explanatory diagram showing the structure of the structure [Figure 2] Flowchart showing a method for manufacturing a structure [Figure 3] FIG. 1 is an explanatory diagram illustrating a configuration of a stand according to an embodiment. [Figure 4] FIG. 1 is an explanatory diagram illustrating a configuration of a stand according to an embodiment. [Figure 5] FIG. 1 is an explanatory diagram illustrating a configuration of a stand according to an embodiment. [Figure 6] An explanatory diagram showing how to erect column reinforcing bars [Figure 7] An explanatory diagram showing how to erect column reinforcing bars [Figure 8] An explanatory diagram showing how to erect column reinforcing bars [Figure 9] FIG. 10 is an explanatory diagram showing the configuration of a mount according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0021] A. Implementation: (Configuration of structure 10) FIG. 1 is an explanatory diagram showing the configuration of a structure 10. FIG. 1 shows a cross section of the structure 10. FIG. 1 also shows an enlarged view of a joint 10C between a column 20 and a beam 30 in the structure 10. FIG. 1 illustrates mutually orthogonal X, Y, and Z axes for specifying directions. In FIG. 1, the Z-axis direction is the up-down direction (vertical direction), the X-axis direction is the horizontal direction, and the Y-axis direction is the horizontal direction and perpendicular to the X-axis direction. The positive Z-axis direction is the upward direction, and the negative Z-axis direction is the downward direction. FIG. 1 also illustrates the ground surface GL. In this specification, members extending in the Z-axis direction do not need to extend strictly in the vertical direction and may have a certain inclination relative to the vertical direction. Similarly, members extending in the X-axis direction and the Y-axis direction do not need to extend strictly horizontally and may have a certain inclination relative to the horizontal direction. The X-axis direction is an example of a first horizontal direction. The Y-axis direction is an example of a second horizontal direction. The Z-axis direction is an example of an up-down direction.

[0022] The structure 10 is, for example, a house, a building, a factory, etc. The structure 10 is a structure having a joint between a reinforced concrete column and a steel beam. The structure 10 includes a column 20, a beam 30, a base mortar 40, a joint concrete 50, and a concrete slab 60.

[0023] The pillar 20 includes pillar reinforcing bars 21 and concrete 25. In other words, the pillar 20 is a reinforced concrete pillar. The outer shape of a cross section of the pillar 20 perpendicular to the Z-axis direction is, for example, rectangular. The pillar 20 is an example of a reinforced concrete pillar.

[0024] The column reinforcing bars 21 are steel bars. The column reinforcing bars 21 have main reinforcements 22 and ties 24. The main reinforcements 22 extend in the vertical direction. The main reinforcements 22 are reinforcing bars that mainly bear tensile forces generated by bending stress. In this embodiment, the column reinforcing bars 21 include multiple (four) main reinforcements 22. Each of the multiple main reinforcements 22 is located near one of the four corners of the column 20 when viewed in the vertical direction. The ties 24 extend horizontally. The ties 24 are rectangular when viewed in the vertical direction and surround the multiple main reinforcements 22. The ties 24 prevent buckling of the main reinforcements 22 and reinforce the strength of the column 20 against shear forces. In this embodiment, the column reinforcing bars 21 include multiple ties 24. The column reinforcing bars 21 may be deformed steel bars with protrusions on their surfaces or round steel bars with a circular cross section. The column reinforcing bars 21 are an example of building materials.

[0025] Concrete 25 is a building material formed by, for example, hardening a mixture of gravel, sand, water, and cement. Concrete 25 extends in the Z-axis direction. Concrete 25 covers column reinforcing bars 21. FIG. 1 shows an upper surface 25S of concrete 25. In other words, upper surface 25S is the top edge of concrete 25. The outer shape of a cross section of concrete 25 perpendicular to the Z-axis direction is, for example, rectangular.

[0026] The beam 30 is a steel beam extending in the X-axis direction. In other words, the beam 30 is a steel beam. The beam 30 is, for example, an H-shaped steel. The beam 30 is placed above the upper surface 25S of the concrete 25 in the column 20. The end of the beam 30 in the X-axis direction overlaps with the column 20 in the vertical direction. The beam 30 is an example of a steel beam.

[0027] The base mortar 40 is a building material formed by, for example, hardening a mixture of sand, water, and cement. The base mortar 40 is part of the joint 10C between the column 20 and the beam 30. The base mortar 40 is disposed between the upper part of the column 20 and the lower part of the beam 30 in the vertical direction. More specifically, the base mortar 40 is disposed between the upper surface 25S of the concrete 25 and the lower surface 30S of the beam 30 in the vertical direction. The base mortar 40 connects the column 20 and the beam 30. In this embodiment, the base mortar 40 is circular when viewed in the vertical direction. The base mortar 40 is a cylindrical member extending in the vertical direction. The height (vertical length) of the base mortar 40 is, for example, approximately 100 mm, and the diameter (horizontal outer diameter) of the base mortar 40 is, for example, approximately 200 mm. The base mortar 40 is provided in the structure 10 mainly to improve the accuracy of the construction of the beam 30.

[0028] The joint concrete 50 is a building material formed, for example, by hardening a mixture of gravel, sand, water, and cement. The joint concrete 50 is part of the joint 10C between the column 20 and the beam 30. The joint concrete 50 is located above the concrete 25 in the column 20. The joint concrete 50 covers part of the upper side of the column reinforcing bar 21. The joint concrete 50 covers the end of the beam 30. The joint concrete 50 covers the base mortar 40. The hardness of the joint concrete 50 is, for example, equivalent to the hardness of the base mortar 40.

[0029] The concrete slab 60 is a floor material made of concrete. The concrete slab 60 supports the weight of, for example, people or objects.

[0030] (Method for manufacturing structure 10) 2 is a flowchart showing a method for manufacturing the structure 10. The structure 10 of this embodiment can be manufactured by the following manufacturing method.

[0031] First, the column reinforcing bars 21 are assembled (S110). A worker assembles the column reinforcing bars 21, for example, in a base assembly yard within the manufacturing site of the structure 10. The worker assembles the column reinforcing bars 21 by arranging the multiple main reinforcements 22 so that they extend horizontally and arranging the hoops 24 so that they cover the outside of the multiple main reinforcements 22. When assembling the column reinforcing bars 21, the worker may use a platform for assembling the column reinforcing bars 21. The worker may transport the column reinforcing bars 21 from the base assembly yard to near the position in the structure 10 where the column reinforcing bars 21 will be arranged, for example, by using a crane truck.

[0032] Next, the column reinforcing bars 21 are erected (S120). The worker erects the column reinforcing bars 21 that have been assembled in the step of S110. The worker erects the column reinforcing bars 21 using the platform 100, which will be described below.

[0033] 3 to 5 are explanatory diagrams showing the configuration of the mount 100 of the embodiment. FIG. 3 is a plan view of the mount 100. FIG. 4 is a cross-sectional view of the mount 100 taken along line IV-IV in FIG. 3. FIG. 5 is a side view of the mount 100. FIGS. 3 to 5 show mutually orthogonal x, y, and z axes for specifying directions. The mount 100 is a mount used to erect building materials. The mount 100 is a mount used to erect, for example, long building materials. In this embodiment, the mount 100 is used to erect column reinforcing bars 21. The mount 100 includes a frame portion 110, a first inner member 120, a second inner member 130, a support portion 140, and a connection portion 150. The x-axis direction is an example of a first direction. The z-axis direction is an example of a second direction. The y-axis direction is an example of a third direction.

[0034] The frame portion 110 is a frame member having a rectangular outer shape when viewed in the x-axis direction, and is formed of, for example, angle steel.

[0035] The first inner member 120 is a member extending in the y-axis direction. The first inner member 120 is disposed inside the frame portion 110 when viewed in the X-axis direction. As will be described later, the gantry 100 of this embodiment includes two support portions 140 that face each other in the y-axis direction, and the first inner member 120 is connected to each of the two support portions 140. The first inner member 120 is formed, for example, from angle steel. The first inner member 120 is used, for example, as a reinforcing member that maintains the structure of the gantry 100.

[0036] The second inner member 130 is a member that extends in a direction perpendicular to the x-axis direction and in a direction oblique to each of the y-axis direction and the z-axis direction. The second inner member 130 is disposed inside the frame portion 110. In this embodiment, the gantry 100 includes four second inner members 130. Each second inner member 130 is connected to each of two mutually perpendicular sides of the frame portion 110. The second inner members 130 are formed, for example, from flat bars (flat steel). The second inner members 130 are used, for example, as reinforcing members that maintain the structure of the gantry 100.

[0037] The support portion 140 is a plate-shaped member perpendicular to the y-axis direction. The support portion 140 is located on the positive x-axis side of the frame portion 110 in the x-axis direction. In this embodiment, the gantry 100 includes two support portions 140. Each support portion 140 is connected to two sides of the frame portion 110 that face each other in the y-axis direction.

[0038] The support portion 140 has a surface 140S facing the positive x-axis direction. As shown in FIG. 5 , a central portion 140SC in the z-axis direction of the surface 140S, which intersects with the x-axis direction, protrudes toward the positive x-axis direction further than an end portion 140SE of the surface 140S in the z-axis direction. The surface 140S is inclined with respect to the x-axis direction such that the inclination with respect to the z-axis direction gradually decreases from the end portion 140SE toward the central portion 140SC. In this embodiment, the central portion 140SC protrudes toward the positive x-axis direction of the x-axis direction further than both end portions of the surface 140S in the z-axis direction, and is inclined with respect to the x-axis direction such that the inclination with respect to the z-axis direction gradually decreases from each of the both end portions in the z-axis direction toward the central portion 140SC. In this embodiment, the surface 140S is arc-shaped when viewed in the y-axis direction.

[0039] The connection portion 150 is located on the negative x-axis side in the x-axis direction relative to the support portion 140. The connection portion 150 is located on the negative x-axis side in the x-axis direction relative to the frame portion 110. In this embodiment, the mounting base 100 has four connection portions 150. Each connection portion 150 is located near a position where each side of the rectangular frame portion 110 intersects. The connection portion 150 is connected to the end of the column reinforcing bar 21. In this embodiment, the connection portion 150 is formed from a pipe material. The connection portion 150 is, for example, a square pipe. The connection portion 150 is connected to the column reinforcing bar 21 by accommodating the column reinforcing bar 21 inside the pipe material. The connection portion 150 is connected to the column reinforcing bar 21 so as to be slidable relative to the column reinforcing bar 21.

[0040] 6 to 8 are explanatory diagrams showing a method for erecting the column reinforcing bars 21. Fig. 6 shows a connected state in which the frame 100 is connected to the column reinforcing bars 21. In this specification, the "connected state" specifically refers to a state in which the frame 100 is connected to the column reinforcing bars 21, and in particular, a state before erection begins. The state before erection begins refers to a state before the end E2 of the column reinforcing bars 21 is lifted by a lifting device, which will be described later.

[0041] As shown in FIG. 6 , the worker arranges the column reinforcing bars 21 so that the entire column reinforcing bars 21 extend in the X-axis direction. The worker connects the gantry 100 to end E1, which is the end of the column reinforcing bars 21 on the X-axis positive side. Specifically, the worker connects end E1 of the column reinforcing bars 21 to the connection part 150 of the gantry 100. In the connected state, the surface 140S of the support part 140 faces the X-axis positive side in the X-axis direction. In the connected state, the central part 140SC of the surface 140S in the Z-axis direction protrudes further toward the X-axis positive side than the end part 140SE of the surface 140S on the lower side in the Z-axis direction. In the connected state, the surface 140S is inclined with respect to the X-axis direction such that the inclination with respect to the Z-axis direction gradually decreases from the end part 140SE toward the central part 140SC. In the connected state, connection part 150 is located on the negative X-axis side of support part 140 in the X-axis direction, and is connected to end part E1 on the positive X-axis side of the building material. A worker connects wire rope 200 connected to a lifting device (not shown), such as a crane, to end part E2, which is the end part of column reinforcing bar 21 on the negative X-axis side in the X-axis direction.

[0042] As shown in FIG. 7, a worker lifts up end E2 of the column reinforcing bar 21. The worker operates a lifting weight device to lift up end E2 of the column reinforcing bar 21. When the worker lifts end E2 of the column reinforcing bar 21 with the lifting weight device, the column reinforcing bar 21 approaches a state parallel to the Z-axis direction from a state perpendicular to the Z-axis direction. In other words, when the worker lifts end E2 of the column reinforcing bar 21 with the lifting weight device, the column reinforcing bar 21 begins to tilt with respect to the X-axis direction so that its inclination with respect to the Z-axis direction becomes smaller. Furthermore, while the worker lifts end E2 of the column reinforcing bar 21 with the lifting weight device, the support part 140 supports the load of the column reinforcing bar 21. A surface 140S of the support part 140 contacts the ground surface GL. While the worker lifts up the end E2 of the column reinforcing bar 21 with the lifting weight device, the surface 140S comes into contact with the ground surface GL while changing the position where the surface 140S comes into contact with the ground surface GL. More specifically, as the column reinforcing bar 21 approaches a state from perpendicular to the Z-axis direction to a state parallel to the Z-axis direction, the position where the surface 140S comes into contact with the ground surface GL moves from the end 140SE side of the surface 140S toward the center 140SC side of the surface 140S.

[0043] When the worker further lifts the end E2 of the column reinforcing bar 21 using the lifting weight, the column reinforcing bar 21 approaches a state parallel to the Z-axis direction. Then, as shown in FIG. 8, the column reinforcing bar 21 moves away from the ground surface GL, and the entire column reinforcing bar 21 is lifted upward. That is, when the column reinforcing bar 21 moves away from the ground surface GL, the column reinforcing bar 21 becomes relatively close to being parallel to the Z-axis direction. For example, when the column reinforcing bar 21 is erected using a mounting base in which the center portion in the Z-axis direction on the surface of the mounting base does not protrude further toward the positive X-axis direction in the X-axis direction than the lower end portion of the surface in the Z-axis direction in the connected state, the position of the point of contact with the ground surface GL on the surface does not change even if the column reinforcing bar 21 moves from a state perpendicular to the Z-axis direction to a state parallel to the Z-axis direction. Then, when the column reinforcing bar 21 moves away from the ground surface GL without becoming close to being parallel to the Z-axis direction, the end E1 of the column reinforcing bar 21 sways in the X-axis direction. On the other hand, when erecting the column reinforcing bar 21 using the mounting frame 100 of this embodiment, when the column reinforcing bar 21 moves away from the ground surface GL, the column reinforcing bar 21 becomes relatively close to parallel in the Z-axis direction, thereby suppressing the end E1 of the column reinforcing bar 21 from shaking in the X-axis direction.

[0044] Furthermore, because the connection part 150 is connected to the column reinforcing bar 21 so as to be slidable relative to the column reinforcing bar 21, when the column reinforcing bar 21 moves away from the ground surface GL, the frame 100 will detach from the column reinforcing bar 21 due to its own weight, as shown in Fig. 8. The worker lifts up the column reinforcing bar 21 as is, and connects the end E1 of the column reinforcing bar 21 to a column reinforcing bar that is located below the column reinforcing bar 21 in the structure 10, for example, with a joint, and places the column reinforcing bar 21.

[0045] Next, concrete 25 is produced (S130). Workers place formwork, for example, made of aluminum or wood, around the outside of the column reinforcing bars 21. Workers pour concrete, prepared by mixing, for example, gravel, sand, water, and cement, into the formwork. Workers perform finishing touches, such as securing the top edge of the concrete, and then harden the concrete. Thereafter, the workers dismantle the formwork to produce concrete 25.

[0046] Next, the base mortar 40 is produced (S140). The worker places the base mortar 40, which is prepared by mixing, for example, sand, water, and cement, on the upper surface 25S of the concrete 25 in the pillar 20. The worker places the base mortar 40 near the center of the concrete 25 when viewed from above and below. After placing the base mortar 40 on the upper surface 25S of the concrete 25, the worker hardens the base mortar 40 to develop its strength, thereby producing the base mortar 40.

[0047] Next, the beam 30 is placed on the upper surface 40S of the base mortar 40 (S150). The worker places the end of the beam 30 on the upper surface 40S of the base mortar 40.

[0048] Next, the concrete joint 50 is produced (S160). The worker sets up a formwork, for example made of aluminum or wood, above the concrete 25. The worker pours concrete prepared by mixing, for example, gravel, sand, water, and cement, into the formwork. The worker performs finishing work, for example, by securing the top edge of the concrete, and then hardens the concrete. Thereafter, the worker dismantles the formwork, thereby producing the concrete joint 50.

[0049] Next, the concrete slab 60 is manufactured (S170). Workers lay a deck plate (not shown) above the beams 30. Workers then pour concrete, prepared by mixing, for example, gravel, sand, water, and cement, onto the deck plate. After performing finishing touches such as securing the top edge of the concrete, the workers allow the concrete to harden, thereby manufacturing the concrete slab 60.

[0050] (Effects of this embodiment) As described above, the mount 100 of this embodiment is used to erect a building material and includes a support portion 140 and a connection portion 150. The support portion 140 has a surface 140S facing the positive x-axis direction. A central portion 140SC of the surface 140S in the z-axis direction, which intersects with the x-axis direction, protrudes further toward the positive x-axis direction than an end portion 140SE of the surface 140S in the z-axis direction. The surface 140S is inclined with respect to the x-axis such that the inclination with respect to the z-axis direction gradually decreases from the end portion 140SE toward the central portion 140SC. The connection portion 150 is located on the negative x-axis side of the support portion 140 and is connected to the end portion of the building material. The mount 100 of this embodiment prevents the building material from shaking when it separates from the ground surface GL during erection, improving the safety of workers erecting the building material.

[0051] In the mount 100 of this embodiment, the surface 140S has an arc shape when viewed in the y-axis direction that intersects with both the x-axis direction and the z-axis direction. According to the mount 100 of this embodiment, the safety of workers when erecting building materials is more effectively improved.

[0052] In the gantry 100 of this embodiment, the building materials are column reinforcing bars 21 that are assembled on the ground. The gantry 100 of this embodiment improves the safety of workers when erecting the column reinforcing bars 21. Furthermore, for example, when the length of the column reinforcing bars 21 is relatively long, the column reinforcing bars 21 may not be assembled on the ground, but may be assembled at the position of the column reinforcing bars 21 in the structure 10, taking into consideration the safety of workers. In this case, for example, it becomes necessary to assemble scaffolding and to pour concrete 25, which increases the cost of the work. However, with the gantry 100 of this embodiment, the column reinforcing bars 21 can be assembled on the ground even when the length of the column reinforcing bars 21 is relatively long, thereby reducing the cost of the work.

[0053] In the gantry 100 of this embodiment, the connection part 150 is formed of a pipe material, and the connection part 150 is connected to the column reinforcing bar 21 by accommodating the column reinforcing bar 21 inside the pipe material. According to the gantry 100 of this embodiment, the column reinforcing bar 21 and the gantry 100 can be connected by accommodating the column reinforcing bar 21 inside the pipe material, so that the column reinforcing bar 21 can be erected in a simple manner.

[0054] In the gantry 100 of this embodiment, the connection portion 150 is connected to the column reinforcing bar 21 so as to be slidable relative to the column reinforcing bar 21. According to the gantry 100 of this embodiment, when the column reinforcing bar 21 is erected, the gantry 100 moves away from the column reinforcing bar 21 due to its own weight, so that, for example, work that follows after erecting the column reinforcing bar 21 can be carried out smoothly.

[0055] In the method for erecting a building material of this embodiment, a frame 100 is connected to an end E1 of the building material on the positive side in the X-axis direction, and an end E2 of the building material on the negative side in the X-axis direction is lifted. The frame 100 includes a support portion 140 and a connection portion 150. In a connected state in which the frame 100 is connected to the building material, the support portion 140 has a surface 140S facing the positive side in the X-axis direction. In the connected state, a central portion 140SC of the surface 140S in the Z-axis direction protrudes further toward the positive X-axis direction than an end portion 140SE of the surface 140S on the lower side in the Z-axis direction. In the connected state, the surface 140S is inclined with respect to the X-axis direction such that the inclination with respect to the Z-axis direction gradually decreases from the end portion 140SE toward the central portion 140SC. In the connected state, the connection part 150 is located on the negative X-axis side of the support part 140 in the X-axis direction, and is connected to the end part E1 of the building material on the positive X-axis side. According to the method for erecting a building material of this embodiment, when erecting the building material, shaking of the building material when it separates from the ground surface GL is suppressed, improving the safety of workers when erecting the building material.

[0056] In the method for erecting building materials of this embodiment, in the connected state, the surface 140S has an arc shape when viewed in the Y-axis direction that intersects both the X-axis direction and the Z-axis direction. According to the method for erecting building materials of this embodiment, the safety of workers when erecting building materials is more effectively improved.

[0057] In the method for erecting building materials of this embodiment, the building materials are column reinforcing bars 21 that are assembled on the ground. According to the method for erecting building materials of this embodiment, the safety of workers when erecting the column reinforcing bars 21 is improved. Furthermore, for example, when the length of the column reinforcing bars 21 is relatively long, the column reinforcing bars 21 may not be assembled on the ground, but may be assembled at the position where the column reinforcing bars 21 are to be arranged in the structure 10, taking into consideration the safety of workers. In this case, for example, it becomes necessary to assemble scaffolding and to pour concrete 25, which increases the cost of the work. According to the method for erecting building materials of this embodiment, the column reinforcing bars 21 can be assembled on the ground even when the length of the column reinforcing bars 21 is relatively long, thereby reducing the cost of the work.

[0058] In the method for erecting building materials of this embodiment, the connection part 150 is formed of a pipe material, and the connection part 150 is connected to the column reinforcing bar 21 by accommodating the column reinforcing bar 21 inside the pipe material. According to the method for erecting building materials of this embodiment, the column reinforcing bar 21 and the frame 100 can be connected by accommodating the column reinforcing bar 21 inside the pipe material, so the column reinforcing bar 21 can be erected in a simple manner.

[0059] In the method for erecting building materials of this embodiment, the connection part 150 is connected to the column reinforcing bar 21 so as to be slidable relative to the column reinforcing bar 21. According to the method for erecting building materials of this embodiment, when the column reinforcing bar 21 is erected, the frame 100 moves away from the column reinforcing bar 21 due to its own weight, so that, for example, work that follows after erecting the column reinforcing bar 21 can be carried out smoothly.

[0060] In the manufacturing method of the pillar 20 of this embodiment, the pillar reinforcing bars 21 are erected by the above-mentioned method for erecting building materials, and concrete 25 is poured to cover the pillar reinforcing bars 21. According to the manufacturing method of the pillar 20 of this embodiment, the safety of workers when erecting the pillar reinforcing bars 21 is improved.

[0061] The manufacturing method for the structure 10 of this embodiment is a manufacturing method for the structure 10 having a joint 10C between a column 20 and a beam 30, in which the column 20 is manufactured by the manufacturing method for the column 20 described above, and the beam 30 is placed above the concrete 25 in the column 20. According to the manufacturing method for the structure 10 of this embodiment, in manufacturing the column 20, the safety of workers when erecting the column reinforcing bars 21 is improved.

[0062] B. Variations: The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified into various forms without departing from the spirit thereof, for example, the following modifications are also possible.

[0063] The mount 100 of the above embodiment is merely an example and can be modified in various ways. Furthermore, the structure 10 and the manufacturing method of the structure 10 of the above embodiment are merely an example and can be modified in various ways.

[0064] 9 is an explanatory diagram showing the configuration of a gantry 100a of a modified example. In the following, among the components of the gantry 100a of this modified example, components common to the gantry 100 of the embodiment are denoted by the same reference numerals, and their description will be omitted as appropriate. The gantry 100a of this modified example differs from the embodiment in the aspect of the support portion 140a. More specifically, the shape of the surface 140Sa of the support portion 140a as viewed in the y-axis direction differs from the shape of the surface 140S of the support portion 140 of the embodiment as viewed in the y-axis direction.

[0065] The support portion 140a has a surface 140Sa facing the positive x-axis direction. As shown in FIG. 9 , a central portion 140SCa of the surface 140Sa in the z-axis direction, which intersects with the x-axis direction, protrudes further toward the positive x-axis direction than an end portion 140SEa of the surface 140Sa in the z-axis direction. The surface 140Sa is inclined with respect to the x-axis direction such that the inclination with respect to the z-axis direction gradually decreases from the end portion 140SEa toward the central portion 140SCa. In this modification, the surface 140Sa has a shape in which, as viewed in the y-axis direction, multiple straight lines are continuous from the end portion 140SEa toward the central portion 140SCa. That is, as viewed in the y-axis direction, the surface 140Sa has multiple straight lines continuous from the end portion 140SEa toward the central portion 140SCa, each of which has a different inclination with respect to the z-axis. The multiple straight lines are arranged in descending order from the end portion 140SEa toward the central portion 140SCa, starting with the line with the greatest inclination with respect to the z-axis. The method for erecting the column reinforcing bars 21 using the support parts 140a is the same as the method for erecting the column reinforcing bars 21 using the support parts 140 of the embodiment. In this way, the surface of the support parts of the frame does not necessarily have to be arc-shaped when viewed in the third direction that intersects with both the first direction and the second direction.

[0066] In the above embodiment, central portion 140SC protrudes toward the positive x-axis direction in the x-axis direction further than both end portions of surface 140S in the z-axis direction, and is inclined with respect to the x-axis direction so that the inclination with respect to the z-axis direction gradually decreases from each of both end portions in the z-axis direction toward central portion 140SC, but this is not necessarily limited to this. That is, it is sufficient that the central portion of the surface protrudes to one side in the first direction further than the end portions on one side in the second direction of the surface, and is inclined with respect to the first direction so that the inclination with respect to the second direction gradually decreases from the end portions on one side in the second direction toward the central portion.

[0067] In the above embodiment, the connection portion 150 is formed of a pipe material, but the connection portion does not necessarily have to be formed of a pipe material.

[0068] In the above embodiment, the connection portion 150 is connected to the column reinforcing bar 21 so that it can slide relative to the column reinforcing bar 21, but this is not necessarily limited to this, and for example, the connection portion and the column reinforcing bar may be temporarily fixed so that the connection portion does not slide relative to the column reinforcing bar.

[0069] In the above embodiment, column reinforcing bars 21 are shown as an example of building materials, but the technology disclosed in this specification can be applied to building materials other than column reinforcing bars. That is, the rack disclosed in this specification can be used to erect building materials other than column reinforcing bars, for example, by changing the shape of the connection part 150 in the rack 100 of the embodiment.

[0070] In the above embodiment, the structure has a joint 10C between the column 20 and the beam 30, but the present invention is not necessarily limited to this. [Explanation of symbols]

[0071] 10: Structure 10C: Joint 20: Column 21: Column reinforcing bar E1: End E2: End 22: Main bar 24: Hoop 25: Concrete 25S: Top surface 30: Beam 30S: Bottom surface 40: Base mortar 40S: Top surface 50: Joint concrete 60: Concrete slab 100, 100a: Frame 110: Frame section 120: First inner member 130: Second inner member 140, 140a: Support section 140S, 140Sa: Surface 140SC, 140SCa: Center 140SE, 140SEa: End 150: Connection section 200: Wire rope GL: Ground surface

Claims

1. A stand used to erect building materials, A support portion, a surface facing one side in a first direction; a central portion of the surface in a second direction intersecting the first direction protrudes toward the one side in the first direction more than an end portion of the surface in the second direction; a support portion, the surface of which is inclined with respect to the first direction such that the inclination with respect to the second direction gradually decreases from the end portion toward the central portion; a connecting portion located on the other side of the support portion in the first direction and connected to an end of the building material; A stand comprising:

2. 2. The cradle according to claim 1, The surface of the mount has an arc shape when viewed in a third direction that intersects both the first direction and the second direction.

3. The stand according to claim 1 or claim 2, The building material is a ground-assembled column reinforcing bar, and the frame.

4. 4. The cradle according to claim 3, The connection portion is formed of a pipe material, The connection portion is connected to the column reinforcing bar by accommodating the column reinforcing bar inside the pipe material.

5. 5. The mount according to claim 4, The connection portion is connected to the column reinforcing bar so as to be slidable relative to the column reinforcing bar.

6. A method for erecting building materials, comprising: a mounting base is connected to one end of the building material in the first horizontal direction; The frame is A support portion, In a connected state in which the rack is connected to the building material, the building material has a surface facing the one side in the first horizontal direction, In the connected state, a central portion of the surface in the up-down direction protrudes toward the one side in the first horizontal direction more than an end portion of the surface on a lower side in the up-down direction, a support portion, the surface of which is inclined with respect to the first horizontal direction such that the inclination with respect to the up-down direction gradually decreases from the end portion toward the central portion in the connected state; a connecting portion that is located on the other side of the support portion in the first horizontal direction in the connected state and is connected to an end portion of the one side of the building material, A method for erecting a building material, comprising lifting the end portion of the building material on the other side in the first horizontal direction.

7. The method for erecting building materials according to claim 6, A method for erecting building materials, wherein, in the connected state, the surface is arc-shaped when viewed in a second horizontal direction that intersects both the first horizontal direction and the up-down direction.

8. The method for erecting a building material according to claim 6 or claim 7, The method for erecting building materials, wherein the building materials are column reinforcing bars assembled on the ground.

9. The method for erecting building materials according to claim 8, The connection portion is formed of a pipe material, A method for erecting building materials, wherein the connection portion is connected to the column reinforcing bar by accommodating the column reinforcing bar inside the pipe material.

10. The method for erecting building materials according to claim 9, A method for erecting building materials, wherein the connection portion is connected to the column reinforcing bar so as to be slidable relative to the column reinforcing bar.

11. A method for manufacturing a reinforced concrete column, comprising: The column reinforcing bars are erected by the method for erecting building materials according to claim 8, A method for manufacturing a reinforced concrete column, which comprises pouring concrete to cover the column reinforcing bars.

12. A method for manufacturing a structure having a joint between a reinforced concrete column and a steel beam, The reinforced concrete column is manufactured by the method for manufacturing a reinforced concrete column according to claim 11, A method for manufacturing a structure, comprising placing the steel beam above the concrete in the reinforced concrete column.

Images