Substrate materials and construction methods

Abstract

This invention provides a base material and a method for constructing wall bases that can improve the constructability of building walls. [Solution] A base material 10 for a building wall, comprising: a first base frame 20; a second base frame 30 rotatably coupled to the first base frame 20; and a first hinge 100 rotatably coupling the second base frame 30 to the first base frame 20. The first base frame 20 includes a first side surface 20A and a second side surface 20B opposite to the first side surface. The second base frame 30 includes a third side surface 30A located on the side of the first base frame 20 when the base material 10 is unfolded, and a fourth side surface 30B opposite to the third side surface 30A. The first hinge 100 includes a first fixing portion fixed to the second side surface 20B of the first base frame 20 so as to be movable in the thickness direction of the first base frame 20, a second fixing portion fixed to the third side surface 30A of the second base frame 30 so as to be movable in the thickness direction of the second base frame 30, and a first rotation axis that rotatably connects the first fixing portion and the second fixing portion.

Description

Technical Field

[0001] The present disclosure relates to a base material for a building wall and a construction method for a base of a building wall.

Background Art

[0002] As a member for constructing a wall of a building, a panel connected body in which two panels are connected to each other by a hinge is known. Patent Document 1 discloses a wall panel connected body for constructing a wall surface of a unit room such as a unit bathroom. The wall panel connected body is arranged as a wall surface of a unit room by pushing open two wall panels with a hinge as a rotation center.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] When constructing a base of a building wall, assembling a base material having a configuration like the wall panel connected body of Patent Document 1 may take time and effort to maintain the panel connected body in an opened state.

Means for Solving the Problem

[0005] (1) A base material that solves the above problem is a base material for the wall of a building, comprising: a first base frame; a second base frame rotatably coupled to the first base frame; and a first hinge rotatably coupling the second base frame to the first base frame, wherein the first base frame includes a first side surface and a second side surface opposite to the first side surface, and the second base frame includes a third side surface located on the side of the first base frame when the base material is unfolded and a fourth side surface opposite to the third side surface, and the first hinge has a first fixing part fixed to the second side surface of the first base frame so as to be movable in the thickness direction of the first base frame, a second fixing part fixed to the third side surface of the second base frame so as to be movable in the thickness direction of the second base frame, and a first rotation axis rotatably coupling the first fixing part and the second fixing part.

[0006] With this configuration, by moving the first and second fixing parts in the thickness direction, the first rotation axis of the first hinge can be positioned between the first and second base frame. This allows the first hinge to be locked so that it is difficult to open and close, thereby suppressing the rotation of the second base frame relative to the first base frame. Consequently, the second base frame can maintain a rotated state relative to the first base frame, improving the workability of the wall base.

[0007] (2) In the base material of (1) above, the first fixing portion has a first fixing portion body fixed to the second side surface of the first base frame and a first protruding portion configured as an extension of the first fixing portion body.

[0008] With this configuration, when the first fixing part and the second fixing part are positioned between the first base frame and the second base frame in the unfolded state of the base material, the first protrusion interferes with the second base frame, thereby effectively suppressing the rotation of the second base frame relative to the first base frame.

[0009] (3) In the base material of (2) above, the second fixing portion has a second fixing portion body fixed to the third side surface of the second base frame and a second protruding portion configured as an extension of the second fixing portion body.

[0010] With this configuration, when the first fixing part and the second fixing part are positioned between the first base frame and the second base frame in the unfolded state of the base material, the second protrusion interferes with the first base frame, thereby effectively suppressing the rotation of the second base frame relative to the first base frame.

[0011] (4) In the base material of (1) above, the first fixing portion has a first fixing portion body fixed to the second side surface of the first base frame and a first projection integrally formed with the first fixing portion body, the first projection extending from the first end of the first fixing portion body in a direction intersecting the direction in which the first fixing portion body extends.

[0012] With this configuration, when the first fixing part body and the second fixing part body are positioned between the first base frame and the second base frame in the unfolded state of the base material, the first protrusion interferes with the second base frame, thereby effectively suppressing the rotation of the second base frame relative to the first base frame.

[0013] (5) In the base material of (4) above, the second fixing portion has a second fixing portion body fixed to the third side surface of the second base frame and a second projection integrally formed with the second fixing portion body, the second projection extending from the second end of the second fixing portion body in a direction intersecting the direction in which the second fixing portion body extends.

[0014] With this configuration, when the first fixing part body and the second fixing part body are positioned between the first base frame and the second base frame in the unfolded state of the base material, the second protrusion interferes with the first base frame, thereby effectively suppressing the rotation of the second base frame relative to the first base frame.

[0015] (6) Any one of the base materials described in (1) to (5) above, further comprising: a third base frame rotatably coupled to the second base frame; and a second hinge rotatably coupling the third base frame to the second base frame, wherein the third base frame includes a fifth side facing the second base frame and a sixth side opposite to the fifth side when the base material is unfolded, and the second hinge includes a third fixing portion fixed to the fourth side of the second base frame so as to be movable in the thickness direction of the second base frame, and The first hinge has a fourth fixing portion fixed to the fifth side surface of the third base frame so as to be movable in the thickness direction of the third base frame, and a second rotation axis that rotatably connects the third fixing portion and the fourth fixing portion, wherein the first rotation axis of the first hinge is located on one side of the first surface and the second surface opposite to the first surface of the first base frame and the second base frame, respectively, and the second rotation axis of the second hinge is located on the other side of the first surface and the second surface of the second base frame and the third base frame, respectively.

[0016] With this configuration, the first rotation axis of the first hinge is positioned on one side of the first and second surfaces of the first and second base frames, respectively, so that the base material can be folded by overlapping the first surfaces of the first and second base frames, or the second surfaces of the first and second base frames, respectively. Furthermore, since the second rotation axis of the second hinge is positioned on the other side of the first and second surfaces of the second and third base frames, respectively, the base material can be folded by overlapping the first surfaces of the second and third base frames, or the second surfaces of the second and third base frames, respectively.

[0017] (7) A construction method that solves the above problem is a construction method for the base of a building wall, comprising an unfolding step of unfolding one of the base materials from (1) to (6) above from a folded state.

[0018] With this configuration, the base material, which is transported in a folded state, can be unfolded on-site through an unfolding process.

[0019] (8) A construction method for solving the above problem is a construction method for a base of a wall of a building, comprising: an expanding step of expanding the base material according to the above (3) from a folded state; and an accommodating step of accommodating the first protruding portion and the second protruding portion between the first base frame body and the second base frame body by applying an external force to the first protruding portion and the second protruding portion.

[0020] According to this configuration, the base material transported in a folded state can be expanded on site in the expanding step, and the hinge can be locked in the accommodating step, so that rotation of the second base frame body relative to the first base frame body can be suppressed.

[0021] (9) A construction method for solving the above problem is a construction method for a base of a wall of a building, comprising: an expanding step of expanding the base material according to the above (5) from a folded state; and an accommodating step of accommodating the first protruding portion and the second protruding portion in stepped portions respectively provided on the first base frame body and the second base frame body by applying an external force to the first protruding portion and the second protruding portion.

[0022] According to this configuration, the base material transported in a folded state can be expanded on site in the expanding step, and the hinge can be locked in the accommodating step, so that rotation of the second base frame body relative to the first base frame body can be suppressed. Effects of the Invention

[0023] According to the base material and the construction method of the present disclosure, the constructability of a wall of a building can be improved. Brief Description of the Drawings

[0024] [Figure 1] It is a perspective view showing an example of a building provided with the base material of the first embodiment. [Figure 2] It is a perspective view showing a folded state of the base material of Fig. 1. [Figure 3] It is a perspective view showing a state in the middle of expansion of the base material of Fig. 2. [Figure 4]Figure 3 is a perspective view showing the unfolded state of the base material. [Figure 5] Figure 2 is a perspective view showing the first base frame, the second base frame, and the first hinge of the base material in its folded state. [Figure 6] Figure 3 is a perspective view showing the first base frame, the second base frame, and the first hinge of the base material in an intermediate state of development. [Figure 7] Figure 5 is a front view showing the first base frame, the second base frame, and the first hinge of the base material. [Figure 8] Figure 2 is a front view showing the second and third base frame and the second hinge of the base material in its folded state. [Figure 9] Figure 5 is a schematic diagram illustrating an example of applying an external force to the first hinge in order to house the first hinge between the first and second base frames. [Figure 10] Figure 9 is a schematic diagram showing the state in which the first hinge is housed between the first and second base frames. [Figure 11] This is a perspective view showing the first base frame, the second base frame, and the first hinge of the base material of the second embodiment. [Figure 12] Figure 11 is a perspective view showing the intermediate stages of development of the first base frame, the second base frame, and the first hinge of the base material. [Figure 13] Figure 11 is a front view showing the first base frame, the second base frame, and the first hinge of the base material. [Figure 14] Figure 11 is a schematic diagram illustrating an example of applying an external force to the first hinge in order to house the first hinge between the first and second base frames. [Figure 15] Figure 14 is a schematic diagram showing the state in which the first hinge is housed between the first and second base frames. [Modes for carrying out the invention]

[0025] (First Embodiment) The base material 10 and construction method of the first embodiment will be described with reference to Figures 1 to 10. Examples of building 1 include houses, community centers, offices, hospitals, public facilities, shops, etc. As shown in Figure 1, building 1 in this embodiment is a house.

[0026] As shown in Figure 1, building 1 has walls 2. Building 1 has an exterior wall 2A as wall 2. The exterior wall 2A separates the exterior space from the interior space. Building 1 may also have an interior wall as wall 2. The interior wall is a partition wall for dividing the interior space.

[0027] <Underlayment 10> Wall 2 is equipped with a base material 10. If wall 2 is an exterior wall 2A, the base material 10 functions as an exterior wall base for attaching components such as waterproof paper, exterior siding, and exterior components. If wall 2 is an interior wall, the base material 10 functions as a retainer for insulation or as an interior wall base for attaching wallpaper.

[0028] As shown in Figures 2 to 4, the base material 10 is unfolded from a folded state. The base material 10 is composed of multiple frames or multiple panels. In this embodiment, the base material 10 is described as being composed of four frames, but the number of frames is not particularly limited.

[0029] As shown in Figures 2 to 10, the base material 10 comprises a first base frame 20, a second base frame 30, and a first hinge 100. The shape of the first base frame 20 is substantially identical to the shape of the second base frame 30. The first base frame 20 and the second base frame 30 are made of wood. The first base frame 20 and the second base frame 30 may be made of metal.

[0030] As shown in Figure 2, the state in which the base material 10 is folded is defined as the folded state. As shown in Figure 3, the state between the folded state and the unfolded state is defined as the unfolded state. As shown in Figure 4, the state in which the base material 10 is unfolded is defined as the unfolded state.

[0031] The thickness direction of the first base frame 20 is defined as the first thickness direction X1. The thickness direction of the second base frame 30 is defined as the second thickness direction X2. The thickness direction of the third base frame 40 is defined as the third thickness direction X3.

[0032] As shown in Figures 2 to 8, the first base frame 20 includes a first side surface 20A and a second side surface 20B opposite to the first side surface 20A. The second side surface 20B is the surface located on the second base frame 30 side when the base material 10 is deployed. Multiple first hinges 100 are fixed to the second side surface 20B. Two first hinges 100 are fixed to the second side surface 20B. Multiple first recesses 21 are provided on the second side surface 20B to which the first hinges 100 are fixed. One first recess 21 is provided above and one below the second side surface 20B.

[0033] The second base frame 30 includes a third side 30A and a fourth side 30B opposite to the third side 30A. The third side 30A is the surface located on the first base frame 20 side when unfolded. The fourth side 30B is the surface located on the third base frame 40 side when the base material 10 is unfolded.

[0034] Multiple first hinges 100 are fixed to the third side surface 30A. Two first hinges 100 are fixed to the third side surface 30A. Multiple second recesses 31 are provided on the third side surface 30A to which the first hinges 100 are fixed. One second recess 31 is provided above and one below the third side surface 30A.

[0035] The second base frame 30 is rotatably connected to the first base frame 20. The second base frame 30 is rotatably connected to the first base frame 20 by a first hinge 100. The first hinge 100 has a first fixing part 110, a second fixing part 120, and a first rotation axis 60.

[0036] The first fixing part 110 is fixed to the second side surface 20B of the first base frame 20 so as to be movable in the first thickness direction X1. The first fixing part 110 has a first fixing part body 111 and a first protruding part 112.

[0037] The first fixing part body 111 is formed in a plate shape. When the first fixing part body 111 is fixed to the second side surface 20B of the first base frame 20, the first fixing part body 111 extends in the first thickness direction X1. The first fixing part body 111 is movable in the first thickness direction X1 on the first recess 21 of the second side surface 20B of the first base frame 20.

[0038] The first fixing part body 111 has a plurality of first fixing elongated holes 110A. The first fixing elongated holes 110A extend in the first thickness direction X1. The first fixing part 110 is fixed to the first base frame 20 by first fastening members 101 such as screws or bolts in the first fixing elongated holes 110A. The first fastening members 101 fix the first fixing part 110 with a force that allows the first fixing part 110 to move in the first thickness direction X1 due to an impact force as an external force.

[0039] The first protrusion 112 is configured as an extension of the first fixing body 111. The first protrusion 112 is formed in a plate shape. When the first fixing body 111 is fixed to the second side surface 20B of the first base frame 20, the first protrusion 112 extends in the first thickness direction X1.

[0040] The first fixing portion 110 has a first connecting portion 113. The first connecting portion 113 includes a through hole into which the first rotating shaft 60 is inserted. The first connecting portion 113 is formed integrally with the first fixing portion body 111 and the first protruding portion 112. In the folded state, the first connecting portion 113 is provided at the first end portion 111A of the first fixing portion body 111 on the second base frame 30 side. The first connecting portion 113 is provided between the first fixing portion body 111 and the first protruding portion 112.

[0041] The second fixing part 120 is fixed to the third side surface 30A of the second base frame 30 so as to be movable in the second thickness direction X2. The second fixing part 120 has a second fixing part body 121 and a second protruding part 122.

[0042] The second fixing part body 121 is formed in a plate shape. When the second fixing part body 121 is fixed to the third side surface 30A of the second base frame 30, the second fixing part body 121 extends in the second thickness direction X2. The second fixing part body 121 is movable in the second thickness direction X2 on the second recess 31 of the third side surface 30A of the second base frame 30.

[0043] The second fixing part body 121 has a plurality of second fixing elongated holes 120A. The second fixing elongated holes 120A extend in the second thickness direction X2. The second fixing part 120 is fixed to the second base frame 30 by a second fastening member 102 such as a screw or bolt in the second fixing elongated holes 120A. The second fastening member 102 fixes the second fixing part 120 with a force that allows the second fixing part 120 to move in the second thickness direction X2 due to an impact force as an external force.

[0044] The second protrusion 122 is configured as an extension of the second fixing body 121. The second protrusion 122 is formed in a plate shape. When the second fixing body 121 is fixed to the third side surface 30A of the second base frame 30, the second protrusion 122 extends in the second thickness direction X2.

[0045] The second fixing portion 120 has a second connecting portion 123. The second connecting portion 123 includes a through hole into which the first rotating shaft 60 is inserted. The second connecting portion 123 is formed integrally with the second fixing portion body 121 and the second protruding portion 122. In the folded state, the second connecting portion 123 is provided at the second end portion 121A of the second fixing portion body 121 on the first base frame 20 side. The second connecting portion 123 is provided between the second fixing portion body 121 and the second protruding portion 122.

[0046] The first rotating shaft 60 rotatably connects the first fixed part 110 and the second fixed part 120. The first connecting part 113 of the first fixed part 110 and the second connecting part 123 of the second fixed part 120 are arranged side by side in the vertical direction. The first rotating shaft 60 is inserted into the through hole of the first connecting part 113 of the first fixed part 110 and the through hole of the second connecting part 123 of the second fixed part 120, thereby rotatably connecting the first fixed part 110 and the second fixed part 120.

[0047] The first recess 21 on the second side surface 20B of the first base frame 20 has a first housing portion 22. The first housing portion 22 is the portion where the first rotation axis 60 is located after the first fixing portion 110 moves in the first thickness direction X1. In the folded state, the first housing portion 22 is provided on the portion of the second side surface 20B of the first base frame 20 that is on the side of the second base frame 30.

[0048] The second recess 31 on the third side surface 30A of the second base frame 30 has a second housing portion 32. The second housing portion 32 is the portion where the first rotation axis 60 is located after the second fixing portion 120 moves in the second thickness direction X2. In the folded state, the second housing portion 32 is provided on the portion of the third side surface 30A of the second base frame 30 that is on the side of the first base frame 20.

[0049] As shown in Figure 8, the base material 10 further comprises a third base frame 40 and a second hinge 130. The shape and material of the third base frame 40 are substantially the same as those of the first base frame 20 and the second base frame 30. The shape and material of the second hinge 130 are substantially the same as those of the first hinge 100.

[0050] The configuration of the second base frame 30, the third base frame 40, and the second hinge 130 is the same as the configuration of the first base frame 20, the second base frame 30, and the first hinge 100.

[0051] Multiple second hinges 130 are fixed to the fourth side surface 30B of the second base frame 30. Two second hinges 130 are fixed to the fourth side surface 30B. Multiple third recesses 33 are provided on the fourth side surface 30B to which the second hinges 130 are fixed. One third recess 33 is provided above and one below the fourth side surface 30B.

[0052] The third base frame 40 includes a fifth side 40A and a sixth side 40B opposite to the fifth side 40A. The fifth side 40A is the side located on the second base frame 30 side when deployed. The sixth side 40B is the side located on the fourth base frame 50 side when deployed.

[0053] Multiple second hinges 130 are fixed to the fifth side surface 40A. Two second hinges 130 are fixed to the fifth side surface 40A. Multiple fourth recesses 41 are provided on the fifth side surface 40A to which the second hinges 130 are fixed. One fourth recess 41 is provided above and one below the fifth side surface 40A.

[0054] The third base frame 40 is rotatably connected to the second base frame 30. The third base frame 40 is rotatably connected to the second base frame 30 by a second hinge 130. The second hinge 130 has a third fixing part 140, a fourth fixing part 150, and a second rotation axis 70.

[0055] The third fixing part 140 is fixed to the fourth side surface 30B of the second base frame 30 so as to be movable in the second thickness direction X2. The third fixing part 140 has a third fixing part body 141 and a third protruding part 142.

[0056] The third fixing part body 141 is formed in a plate shape. When the third fixing part body 141 is fixed to the fourth side surface 30B of the second base frame 30, the third fixing part body 141 extends in the second thickness direction X2. The third fixing part body 141 is movable in the second thickness direction X2 on the third recess 33 of the fourth side surface 30B of the second base frame 30.

[0057] The third fixing part body 141 has a plurality of third fixing elongated holes 140A. The third fixing elongated holes 140A extend in the second thickness direction X2. The third fixing part 140 is fixed to the second base frame 30 by third fastening members 131 such as screws or bolts in the third fixing elongated holes 140A. The third fastening members 131 fix the third fixing part 140 with a force that allows the third fixing part 140 to move in the second thickness direction X2 due to an impact force as an external force.

[0058] The third protrusion 142 is configured as an extension of the third fixing body 141. The third protrusion 142 is formed in a plate shape. When the third fixing body 141 is fixed to the fourth side surface 30B of the second base frame 30, the third protrusion 142 extends in the second thickness direction X2.

[0059] The third fixing portion 140 has a third connecting portion 143. The third connecting portion 143 includes a through hole into which the second rotating shaft 70 is inserted. The third connecting portion 143 is formed integrally with the third fixing portion body 141 and the third protruding portion 142. In the folded state, the third connecting portion 143 is provided at the third end portion 141A of the third fixing portion body 141 on the third base frame 40 side. The third connecting portion 143 is provided between the third fixing portion body 141 and the third protruding portion 142.

[0060] The fourth fixing part 150 is fixed to the fifth side surface 40A of the third base frame 40 so as to be movable in the third thickness direction X3. The fourth fixing part 150 has a fourth fixing part body 151 and a fourth protruding part 152.

[0061] The fourth fixing part body 151 is formed in a plate shape. When the fourth fixing part body 151 is fixed to the fifth side surface 40A of the third base frame 40, the fourth fixing part body 151 extends in the third thickness direction X3. The fourth fixing part body 151 is movable in the third thickness direction X3 on the fourth recess 41 of the fifth side surface 40A of the third base frame 40.

[0062] The fourth fixing part body 151 has a plurality of fourth fixing elongated holes 150A. The fourth fixing elongated holes 150A extend in the third thickness direction X3. The fourth fixing part 150 is fixed to the third base frame 40 by a fourth fastening member 132 such as a screw or bolt in the fourth fixing elongated holes 150A. The fourth fastening member 132 fixes the fourth fixing part 150 with a force that allows the fourth fixing part 150 to move in the third thickness direction X3 due to an impact force as an external force.

[0063] The fourth protrusion 152 is configured as an extension of the fourth fixing body 151. The fourth protrusion 152 is formed in a plate shape. When the fourth fixing body 151 is fixed to the fifth side surface 40A of the third base frame 40, the fourth protrusion 152 extends in the third thickness direction X3.

[0064] The fourth fixing portion 150 has a fourth connecting portion 153. The fourth connecting portion 153 includes a through hole into which the second rotating shaft 70 is inserted. The fourth connecting portion 153 is formed integrally with the fourth fixing portion body 151 and the fourth protruding portion 152. In the folded state, the fourth connecting portion 153 is provided at the fourth end portion 151A of the fourth fixing portion body 151 on the second base frame 30 side. The fourth connecting portion 153 is provided between the fourth fixing portion body 151 and the fourth protruding portion 152.

[0065] The second rotating shaft 70 rotatably connects the third fixed part 140 and the fourth fixed part 150. The third connecting part 143 of the third fixed part 140 and the fourth connecting part 153 of the fourth fixed part 150 are arranged side by side in the vertical direction. The second rotating shaft 70 is inserted into the through hole of the third connecting part 143 of the third fixed part 140 and the through hole of the fourth connecting part 153 of the fourth fixed part 150, thereby rotatably connecting the third fixed part 140 and the fourth fixed part 150.

[0066] The third recess 33 on the fourth side surface 30B of the second base frame 30 has a third housing portion 34. The third housing portion 34 is the portion where the second rotation axis 70 is located after the third fixing portion 140 moves in the second thickness direction X2. In the folded state, the third housing portion 34 is provided on the portion of the fourth side surface 30B of the second base frame 30 that is on the side of the third base frame 40.

[0067] The fourth recess 41 on the fifth side surface 40A of the third base frame 40 has a fourth housing portion 42. The fourth housing portion 42 is the portion where the second rotation axis 70 is located after the fourth fixing portion 150 moves in the third thickness direction X3. In the folded state, the fourth housing portion 42 is provided on the portion of the fifth side surface 40A of the third base frame 40 that is on the second base frame 30 side.

[0068] One side of each base frame in the thickness direction is defined as the first surface 11. The side of each base frame opposite to the first surface 11 in the thickness direction is defined as the second surface 12.

[0069] The first pivot axis 60 of the first hinge 100 is positioned on one side of the first surface 11 and the second surface 12 of the first base frame 20 and the second base frame 30, respectively. The second pivot axis 70 of the second hinge 130 is positioned on the other side of the first surface 11 and the second surface 12 of the second base frame 30 and the third base frame 40, respectively.

[0070] As shown in Figures 3, 7, and 8, the first rotation axis 60 of the first hinge 100 is positioned on the first surface 11 side of the first base frame 20 and the second base frame 30, respectively. The second rotation axis 70 of the second hinge 130 is positioned on the second surface 12 of the second base frame 30 and the third base frame 40, respectively.

[0071] As shown in Figures 3 to 8, the base material 10 further comprises a fourth base frame 50 and a third hinge 160. The shape and material of the fourth base frame 50 are substantially the same as those of the first base frame 20, the second base frame 30, and the third base frame 40. The shape and material of the third hinge 160 are substantially the same as those of the first hinge 100 and the second hinge 130.

[0072] The fourth base frame 50 is rotatably connected to the third base frame 40. The fourth base frame 50 is rotatably connected to the third base frame 40 by a third hinge 160. The third hinge 160 is fixed to the third base frame 40 and the fourth base frame 50 so as to be movable in the thickness direction of the third base frame 40 and the fourth base frame 50.

[0073] The third hinge 160 has two protrusions similar to the first protrusion 112 and the second protrusion 122 of the first hinge 100. The relationship between the third base frame 40, the fourth base frame 50, and the third hinge 160 is the same as the relationship between the first base frame 20, the second base frame 30, and the first hinge 100, so a detailed description is omitted.

[0074] The third pivot axis of the third hinge 160 is positioned on one side of the first surface 11 and the second surface 12 of the third base frame 40 and the fourth base frame 50, respectively. Since the pivot axes of each hinge are alternately positioned on one side of the first surface 11 and the second surface 12 and on the other side of the first surface 11 and the second surface 12, the base material 10 can be folded appropriately.

[0075] <Construction method> Referring to Figures 2 to 4, Figure 9, and Figure 10, the construction method for the base of the wall 2 of building 1 will be explained. The construction method includes an unfolding step in which the base material 10 is unfolded from a folded state. In the unfolding step, the base material 10 goes from a folded state, through an intermediate unfolding state, to an unfolded state.

[0076] The construction method includes a housing step. The housing step is the step of housing each hinge of the base material 10 between each base frame. The housing step includes a first housing step, a second housing step, and a third housing step.

[0077] The first housing step is to house the first protrusion 112 and the second protrusion 122 between the first base frame 20 and the second base frame 30 by applying an external force to the first protrusion 112 and the second protrusion 122. The external force is, for example, a striking force from a hammer or the like. The external force is not particularly limited to a striking force, as long as it is a force applied to the hinge in order to push the hinge in.

[0078] The second housing step is to house the third protrusion 142 and the fourth protrusion 152 of the second hinge 130 between the second base frame 30 and the third base frame 40, in the same manner as the first housing step. The third housing step is to house the two protrusions of the third hinge 160 between the third base frame 40 and the fourth base frame 50, in the same manner as the first housing step.

[0079] As an example of the storage process, the first storage process will be described. Figures 9 and 10 show a portion of the base material 10 in its unfolded state. In Figures 9 and 10, for convenience, in order to show the movement of the first hinge 100, the first base frame 20 and the second base frame 30 are shown in cross-section along the DX-DX line in Figure 4, and the first hinge 100 is shown in plan view from the first fixing part 110 side.

[0080] As shown in Figures 9 and 10, in the first housing step, a striking force is applied to the first projection 112 of the first hinge 100 and the second projection 122 of the second hinge 130 using a hammer or the like. Due to the striking force, the first fixing part 110 moves in the first thickness direction X1, and the first projection 112 is housed between the first base frame 20 and the second base frame 30. Due to the striking force, the second fixing part 120 moves in the second thickness direction X2, and the second projection 122 is housed between the first base frame 20 and the second base frame 30.

[0081] <Operation of the First Embodiment> The operation of the first embodiment will now be described. By moving the first fixing part 110 and the second fixing part 120 in the thickness direction, the first rotation axis 60 of the first hinge 100 can be positioned between the first base frame 20 and the second base frame 30. As a result, the first protrusion 112 and the second protrusion 122 obstruct the rotation of the second base frame 30 relative to the first base frame 20, and the first hinge 100 can be locked so that it is difficult to open and close. Therefore, the rotation of the second base frame 30 relative to the first base frame 20 can be suppressed.

[0082] <Effects of the First Embodiment> The effects of the first embodiment will be explained. (1-1) A base material 10 for a wall 2 of a building 1, comprising a first base frame 20, a second base frame 30 rotatably connected to the first base frame 20, and a first hinge 100 rotatably connecting the second base frame 30 to the first base frame 20. The first base frame 20 includes a first side surface 20A and a second side surface 20B opposite to the first side surface 20A. The second base frame 30 includes a third side surface 30A located on the side of the first base frame 20 and a fourth side surface 30B opposite to the third side surface 30A. The first hinge 100 includes a first fixing portion 110 fixed to the second side surface 20B of the first base frame 20 so as to be movable in the thickness direction of the first base frame 20, a second fixing portion 120 fixed to the third side surface 30A of the second base frame 30 so as to be movable in the thickness direction of the second base frame 30, and a first rotation axis 60 that rotatably connects the first fixing portion 110 and the second fixing portion 120.

[0083] With this configuration, by moving the first fixing part 110 and the second fixing part 120 in the thickness direction, the first rotation axis 60 of the first hinge 100 can be positioned between the first base frame 20 and the second base frame 30. This allows the first hinge 100 to be locked so that it is difficult to open and close, thereby suppressing the rotation of the second base frame 30 relative to the first base frame 20. Therefore, the second base frame 30 can maintain a rotated state relative to the first base frame 20, thereby improving the workability of the base for the wall 2.

[0084] (1-2) The first fixing part 110 has a first fixing part body 111 which is fixed to the second side surface 20B of the first base frame 20, and a first protruding part 112 which is configured as an extension of the first fixing part body 111.

[0085] With this configuration, when the base material 10 is deployed and the first fixing part 110 and the second fixing part 120 are positioned between the first base frame 20 and the second base frame 30, the first protrusion 112 interferes with the second base frame 30, thereby effectively suppressing the rotation of the second base frame 30 relative to the first base frame 20.

[0086] (1-3) The second fixing part 120 has a second fixing part body 121 that is fixed to the third side surface 30A of the second base frame 30, and a second protruding part 122 that is configured as an extension of the second fixing part body 121.

[0087] With this configuration, when the base material 10 is deployed and the first fixing part 110 and the second fixing part 120 are positioned between the first base frame 20 and the second base frame 30, the second protrusion 122 interferes with the first base frame 20, thereby effectively suppressing the rotation of the second base frame 30 relative to the first base frame 20.

[0088] (1-4) The third base frame 40 is rotatably coupled to the second base frame 30, and the third base frame 40 is rotatably coupled to the second base frame 30 by a second hinge 130. The third base frame 40 includes a fifth side surface 40A located on the side of the second base frame 30 and a sixth side surface 40B opposite to the fifth side surface 40A. The second hinge 130 has a third fixing part 140 fixed to the fourth side surface 30B of the second base frame 30 so as to be movable in the thickness direction of the second base frame 30, a fourth fixing part 150 fixed to the fifth side surface 40A of the third base frame 40 so as to be movable in the thickness direction of the third base frame 40, and a second rotation axis 70 rotatably coupling the third fixing part 140 and the fourth fixing part 150. The first pivot axis 60 of the first hinge 100 is positioned on one side of the first surface 11 and the second surface 12 opposite to the first surface 11 of the first base frame 20 and the second base frame 30, respectively. The second pivot axis 70 of the second hinge 130 is positioned on the other side of the first surface 11 and the second surface 12 of the second base frame 30 and the third base frame 40, respectively.

[0089] With this configuration, the first rotation axis 60 of the first hinge 100 is positioned on one side of the first surface 11 and the second surface 12 of the first base frame 20 and the second base frame 30, respectively, so that the base material 10 can be folded by overlapping the first surfaces 11 of the first base frame 20 and the second base frame 30, or the second surfaces 12 of the first base frame 20 and the second base frame 30. Furthermore, the second rotation axis 70 of the second hinge 130 is positioned on the other side of the first surface 11 and the second surface 12 of the second base frame 30 and the third base frame 40, respectively, so that the base material 10 can be folded by overlapping the first surfaces 11 of the second base frame 30 and the third base frame 40, or the second surfaces 12 of the second base frame 30 and the third base frame 40.

[0090] (1-5) The construction method for the base of the wall 2 of building 1 includes an unfolding step in which the base material 10 is unfolded from a folded state.

[0091] With this configuration, the base material 10, which is transported in a folded state, can be unfolded on-site through an unfolding process.

[0092] (1-6) The method for constructing the base of the wall 2 of building 1 comprises an unfolding step of unfolding the base material 10 from a folded state, and a housing step of housing the first protrusion 112 and the second protrusion 122 between the first base frame 20 and the second base frame 30 by applying external force to the first protrusion 112 and the second protrusion 122.

[0093] With this configuration, the base material 10, which is transported in a folded state, can be unfolded on-site during the unfolding process, and the hinges can be locked during the storage process, thereby suppressing the rotation of the second base frame 30 relative to the first base frame 20.

[0094] <Second Embodiment> The base material 10 and construction method of the second embodiment will be described with reference to Figures 2 to 4 and Figures 11 to 15. In this embodiment, components common to the first embodiment are denoted by the same reference numerals as in the first embodiment, and the description of redundant components is omitted.

[0095] As shown in Figures 11 to 13, the base material 10 comprises a first base frame 20, a second base frame 30, and a first hinge 100. The second side surface 20B of the first base frame 20 is provided with a plurality of first recesses 21 to which the first hinge 100 is fixed. The third side surface 30A of the second base frame 30 is provided with a plurality of second recesses 31 to which the first hinge 100 is fixed.

[0096] The second base frame 30 is rotatably connected to the first base frame 20 by the first hinge 100. The first hinge 100 has a first fixing part 110, a second fixing part 120, and a first rotation axis 60.

[0097] The first fixing part 110 is fixed to the second side surface 20B of the first base frame 20 so as to be movable in the first thickness direction X1. The first fixing part 110 has a first fixing part body 111 and a first protruding part 112.

[0098] The first fixing part body 111 has a plurality of first fixing elongated holes 110A. The first fixing part 110 is fixed to the first base frame 20 so as to be movable in the first thickness direction X1 by first fastening members 101 such as screws or bolts in the first fixing elongated holes 110A.

[0099] The first fixing portion 110 has a first connecting portion 113. The first connecting portion 113 includes a through hole into which the first rotating shaft 60 is inserted. The first connecting portion 113 is formed integrally with the first fixing portion body 111 and the first protruding portion 112. In the folded state, the first connecting portion 113 is provided at the first end portion 111A of the first fixing portion body 111 on the second base frame 30 side.

[0100] The direction intersecting the direction in which the first fixing part body 111 extends is defined as the first intersecting direction. The first intersecting direction intersects the direction in which the first rotating shaft 60 extends when the first rotating shaft 60 is inserted into the through hole of the first connecting part 113. The direction in which the first fixing part body 111 extends substantially coincides with the first thickness direction X1.

[0101] In the second embodiment, the first projection 112 extends from the first end 111A of the first fixing body 111 in a first intersecting direction. Specifically, the first projection 112 extends from the first connecting portion 113 in a first intersecting direction. The first projection 112 extends outward in the folded state so as not to be located between the first surface 11 of the first base frame 20 and the first surface 11 of the second base frame 30.

[0102] The second fixing part 120 is fixed to the third side surface 30A of the second base frame 30 so as to be movable in the second thickness direction X2. The second fixing part 120 has a second fixing part body 121 and a second protruding part 122.

[0103] The second fixing part body 121 has a plurality of second fixing elongated holes 120A. The second fixing part 120 is fixed to the second base frame 30 so as to be movable in the second thickness direction X2 by a second fastening member 102 such as a screw or bolt in the second fixing elongated holes 120A.

[0104] The second fixing portion 120 has a second connecting portion 123. The second connecting portion 123 includes a through hole into which the first rotating shaft 60 is inserted. The second connecting portion 123 is formed integrally with the second fixing portion body 121 and the second protruding portion 122. In the folded state, the second connecting portion 123 is provided at the second end portion 121A of the second fixing portion body 121 on the first base frame 20 side.

[0105] The direction intersecting the direction in which the second fixing part body 121 extends is defined as the second intersecting direction. The second intersecting direction intersects the direction in which the first rotation axis 60 extends when the second connecting part 123 is inserted into the through hole. The direction in which the second fixing part body 121 extends substantially coincides with the second thickness direction X2.

[0106] In the second embodiment, the second projection 122 extends from the second end 121A of the second fixing body 121 in a second intersecting direction. Specifically, the second projection 122 extends from the second connecting portion 123 in a second intersecting direction. The second projection 122 extends outward so that, in the folded state, it is not located between the first surface 11 of the first base frame 20 and the first surface 11 of the second base frame 30.

[0107] The first rotating shaft 60 rotatably connects the first fixed part 110 and the second fixed part 120. The first connecting part 113 of the first fixed part 110 and the second connecting part 123 of the second fixed part 120 are arranged side by side in the vertical direction. The first rotating shaft 60 is inserted into the through hole of the first connecting part 113 of the first fixed part 110 and the through hole of the second connecting part 123 of the second fixed part 120, thereby rotatably connecting the first fixed part 110 and the second fixed part 120.

[0108] The first recess 21 on the second side surface 20B of the first base frame 20 has a first housing portion 22. In this embodiment, after the first fixing portion 110 moves in the first thickness direction X1, at least a portion of the first rotation axis 60 is positioned in the first housing portion 22. In the folded state, the first housing portion 22 is provided on the portion of the second side surface 20B of the first base frame 20 that is on the side of the second base frame 30.

[0109] The first base frame 20 has a first stepped portion 13A as a stepped portion 13. The first stepped portion 13A is the portion where the second protruding portion 122 is positioned after the second fixing portion 120 moves in the second thickness direction X2. The first stepped portion 13A is provided on the first surface 11 of the first base frame 20.

[0110] The second recess 31 on the third side surface 30A of the second base frame 30 has a second housing portion 32. In this embodiment, after the second fixing portion 120 moves in the second thickness direction X2, at least a portion of the first rotation axis 60 is positioned in the second housing portion 32. In the folded state, the second housing portion 32 is provided on the portion of the third side surface 30A of the second base frame 30 that is on the side of the first base frame 20.

[0111] The first base frame 20 has a second stepped portion 13B as a stepped portion 13. The second stepped portion 13B is the portion where the first protruding portion 112 is positioned after the first fixing portion 110 moves in the first thickness direction X1. The second stepped portion 13B is provided on the first surface 11 of the second base frame 30.

[0112] <Construction method> Referring to Figures 2 to 4 and Figures 11 to 15, the construction method for the base of the wall 2 of building 1 will be explained. The construction method includes an unfolding step in which the base material 10 is unfolded from a folded state. In the unfolding step, the base material 10 goes from a folded state to an intermediate unfolding state and then to an unfolded state.

[0113] The construction method includes a storage step. As an example of the storage step in the second embodiment, the first storage step will be described. Figures 14 and 15 show a portion of the base material 10 in its unfolded state. In Figures 14 and 15, for convenience, in order to show the movement of the first hinge 100, the first base frame 20 and the second base frame 30 are shown in cross-section along the DX-DX line in Figure 4, and the first hinge 100 is shown in plan view from the first fixing part 110 side.

[0114] The first housing step is to house the first protrusion 112 and the second protrusion 122 in the stepped portion 13 provided on the first base frame 20 and the second base frame 30, respectively, by applying an impact force as an external force to the first protrusion 112 and the second protrusion 122.

[0115] In the first housing step, a striking force is applied to the first projection 112 of the first hinge 100 and the second projection 122 of the second hinge 130 using a hammer or the like. Due to the striking force, the first fixing part 110 moves in the first thickness direction X1, and the first projection 112 is housed in the second step part 13B. Due to the striking force, the second fixing part 120 moves in the second thickness direction X2, and the second projection 122 is housed in the first step part 13A.

[0116] <Effects of the second embodiment> The effects of the second embodiment will be explained. (2-1) The first fixing part 110 has a first fixing part body 111 fixed to the second side surface 20B of the first base frame 20, and a first projection 112 formed integrally with the first fixing part body 111. The first projection 112 extends from the first end 111A of the first fixing part body 111 in a direction intersecting the direction in which the first fixing part body 111 extends.

[0117] With this configuration, when the first fixing part body 111 and the second fixing part body 121 are positioned between the first base frame 20 and the second base frame 30 in the unfolded state of the base material 10, the first protrusion 112 interferes with the second base frame 30, thereby effectively suppressing the rotation of the second base frame 30 relative to the first base frame 20.

[0118] (2-2) The second fixing portion 120 has a second fixing portion body 121 fixed to the third side surface 30A of the second base frame 30, and a second projection 122 formed integrally with the second fixing portion body 121. The second projection 122 extends from the second end 121A of the second fixing portion body 121 in a direction intersecting the direction in which the second fixing portion body 121 extends.

[0119] With this configuration, when the first fixing part body 111 and the second fixing part body 121 are positioned between the first base frame 20 and the second base frame 30 in the unfolded state of the base material 10, the second protrusion 122 interferes with the first base frame 20, thereby effectively suppressing the rotation of the second base frame 30 relative to the first base frame 20.

[0120] (2-3) The method for constructing the base of the wall 2 of the building 1 comprises an unfolding step of unfolding the base material 10 from a folded state, and a housing step of housing the first protrusion 112 and the second protrusion 122 in the stepped portion 13 provided on the first base frame 20 and the second base frame 30, respectively, by applying external force to the first protrusion 112 and the second protrusion 122.

[0121] With this configuration, the base material 10, which is transported in a folded state, can be unfolded on-site during the unfolding process, and the hinges can be locked during the storage process, thereby suppressing the rotation of the second base frame 30 relative to the first base frame 20.

[0122] <Example of changes> Each embodiment is an example of possible configurations for the construction method of the substrate material 10 and the wall 2. Each embodiment is not intended to limit the possible configurations for the construction method of the substrate material 10 and the wall 2. The construction method of the substrate material 10 and the wall 2 may take a form different from the configurations illustrated in each embodiment. A form different from the configurations illustrated in each embodiment is, for example, a configuration in which a part of the configuration of each embodiment is replaced, modified, or omitted, or a configuration in which a new configuration is added to each embodiment. Examples of modifications to each embodiment are shown below.

[0123] The configuration of the second embodiment may be applied not only to the first hinge 100, but also to the second hinge 130 and the third hinge 160. In this case, the stepped portion 13 is provided on the two support frames to which the fixing portion of the hinge to which the configuration of the second embodiment is applied is fixed. In particular, when the configuration of the second embodiment is applied to a hinge to which the axis of rotation is located on the second surface 12 side of the base frame, the stepped portion 13 is provided on the second surface 12 of the base frame.

[0124] In the second embodiment, the first projection 112 may extend inward so as to be located between the first surface 11 of the first base frame 20 and the first surface 11 of the second base frame 30 when folded.

[0125] In the second embodiment, the second projection 122 may extend inward so as to be located between the first surface 11 of the first base frame 20 and the first surface 11 of the second base frame 30 when folded.

[0126] In each embodiment, at least one of the two protrusions provided on each hinge may be omitted.

[0127] This specification discloses the following technologies: [Note 1] The base material in Appendix 1 is a base material for the wall of a building, comprising: a first base frame; a second base frame rotatably coupled to the first base frame; and a first hinge rotatably coupling the second base frame to the first base frame, wherein the first base frame includes a first side surface and a second side surface opposite to the first side surface, and the second base frame includes a third side surface located on the first base frame side when the base material is unfolded, and a fourth side surface opposite to the third side surface, and the first hinge has a first fixing part fixed to the second side surface of the first base frame so as to be movable in the thickness direction of the first base frame; a second fixing part fixed to the third side surface of the second base frame so as to be movable in the thickness direction of the second base frame; and a first rotation axis rotatably coupling the first fixing part and the second fixing part.

[0128] [Note 2] In the base material described in Appendix 1, the first fixing portion has a first fixing portion body fixed to the second side surface of the first base frame and a first protruding portion configured as an extension of the first fixing portion body.

[0129] [Note 3] In the base material described in Appendix 2, the second fixing portion has a second fixing portion body fixed to the third side surface of the second base frame and a second protruding portion configured as an extension of the second fixing portion body.

[0130] [Note 4] In the base material described in Appendix 1, the first fixing portion has a first fixing portion body fixed to the second side surface of the first base frame and a first projection integrally formed with the first fixing portion body, the first projection extending from the first end of the first fixing portion body in a direction intersecting the direction in which the first fixing portion body extends.

[0131] [Note 5] In the base material described in Appendix 4, the second fixing portion has a second fixing portion body fixed to the third side surface of the second base frame and a second projection integrally formed with the second fixing portion body, the second projection extending from the second end of the second fixing portion body in a direction intersecting the direction in which the second fixing portion body extends.

[0132] [Note 6] The base material described in Appendix 1 further comprises a third base frame rotatably coupled to the second base frame, and a second hinge rotatably coupling the third base frame to the second base frame, wherein the third base frame includes a fifth side facing the second base frame and a sixth side opposite to the fifth side when the base material is unfolded, and the second hinge includes a third fixing portion fixed to the fourth side of the second base frame so as to be movable in the thickness direction of the second base frame, and the third base frame The first hinge has a fourth fixing portion fixed to the fifth side surface of the third base frame so as to be movable in the thickness direction, and a second rotation axis that rotatably connects the third fixing portion and the fourth fixing portion, wherein the first rotation axis of the first hinge is located on one side of the first surface and the second surface opposite to the first surface of the first base frame and the second base frame, respectively, and the second rotation axis of the second hinge is located on the other side of the first surface and the second surface of the second base frame and the third base frame, respectively.

[0133] [Note 7] The construction method described in Appendix 7 is a construction method for the base of a building wall, and includes an unfolding step of unfolding the base material described in any one of Appendix 1 to 6 from a folded state.

[0134] [Note 8] The construction method of Appendix 8 is a construction method for the base of a building wall, comprising: an unfolding step of unfolding the base material described in Appendix 3 from a folded state; and a housing step of housing the first protrusion and the second protrusion between the first base frame and the second base frame by applying external force to the first protrusion and the second protrusion.

[0135] [Note 9] The construction method of Appendix 9 is a construction method for the base of a building wall, comprising: an unfolding step of unfolding the base material described in Appendix 5 from a folded state; and a housing step of housing the first protrusion and the second protrusion in the stepped portions provided on the first base frame and the second base frame, respectively, by applying external force to the first protrusion and the second protrusion. [Explanation of Symbols]

[0136] 1...Building, 2...Wall, 10...Substrate material, 11...First surface, 12...Second surface, 13...Step section, 20...First substrate frame, 20A...First side, 20B...Second side, 30...Second substrate frame, 30A...Third side, 30B...Fourth side, 40...Third substrate frame, 40A...Fifth side, 40B...Sixth side, 60...First rotation axis, 70...Second rotation axis, 100...First hinge, 110...First fixing part, 111...First fixing part body, 111A...First end, 112...First protrusion, 120...Second fixing part, 121...Second fixing part body, 121A...Second end, 122...Second protrusion, 130...Second hinge, 140...Third fixing part, 150...Fourth fixing part.

Claims

1. It is a base material for the walls of a building, First base frame and, A second base frame is rotatably connected to the first base frame, The first base frame is rotatably connected to the second base frame by a first hinge, The first base frame includes a first side and a second side opposite to the first side, The second base frame includes a third side located on the side of the first base frame when the base material is unfolded, and a fourth side opposite to the third side. The aforementioned base material has a folded state in which the second base frame is folded into the first base frame, and an unfolded state in which the second base frame is unfolded relative to the first base frame. The first hinge is, A first fixing portion is fixed to the second side surface of the first base frame so as to be movable in the thickness direction of the first base frame, A second fixing portion is fixed to the third side surface of the second base frame so as to be movable in the thickness direction of the second base frame, The first fixing part and the second fixing part are rotatably connected, and the first rotating shaft is positioned between the first base frame and the second base frame in the thickness direction of the first base frame when the frame is folded, The first fixing portion has a first fixing portion body fixed to the second side surface of the first base frame, and a first projection that extends on the opposite side of the first fixing portion body with respect to the first rotation axis and is configured as an extension of the first fixing portion body. The second fixing portion comprises a second fixing portion body fixed to the third side surface of the second base frame, and a second projection extending on the opposite side of the second fixing portion body with respect to the first rotation axis and configured as an extension of the second fixing portion body. The first base frame has a first housing portion provided on the portion of the second side surface of the first base frame that is on the side of the second base frame when folded, The second base frame has a second housing portion provided on the portion of the third side surface of the second base frame that is on the side of the first base frame when folded, When the first hinge moves in the thickness direction of the first base frame in the unfolded state of the base material, the first rotation axis, the first projection, and the second projection are housed in the space formed by the first housing and the second housing. Substrate material.

2. It is a base material for the walls of a building, First base frame and, A second base frame is rotatably connected to the first base frame, The first base frame is rotatably connected to the second base frame by a first hinge, The first base frame includes a first side and a second side opposite to the first side, The second base frame includes a third side located on the side of the first base frame when the base material is unfolded, and a fourth side opposite to the third side. The aforementioned base material has a folded state in which the second base frame is folded into the first base frame, and an unfolded state in which the second base frame is unfolded relative to the first base frame. In the first base frame, the surface facing the second base frame in the folded state is defined as the first opposing surface. In the second base frame, the surface facing the first base frame in the folded state is defined as the second opposing surface. The first hinge is, A first fixing portion is fixed to the second side surface of the first base frame so as to be movable in the thickness direction of the first base frame, A second fixing portion is fixed to the third side surface of the second base frame so as to be movable in the thickness direction of the second base frame, The first fixing part and the second fixing part are rotatably connected, and the first rotating shaft is positioned between the first base frame and the second base frame in the thickness direction of the first base frame when the frame is folded, The first fixing portion has a first fixing portion body fixed to the second side surface of the first base frame and a first protruding portion formed integrally with the first fixing portion body. The first projection extends from the first end of the first fixing body where the first rotation axis is located, in a direction intersecting the direction in which the first fixing body extends along the thickness direction of the first base frame, toward the second base frame in the unfolded state, The second fixing portion has a second fixing portion body fixed to the third side surface of the second base frame and a second protruding portion formed integrally with the second fixing portion body. The second projection extends from the second end of the second fixing body where the first rotation axis is located, in a direction intersecting the direction in which the second fixing body extends along the thickness direction of the second base frame, toward the first base frame in the unfolded state, The first base frame has, in the folded state, a first housing portion provided on the portion of the second side surface of the first base frame that is on the side of the second base frame, and a first step portion provided on the first opposing surface. The second base frame has, in the folded state, a second housing portion provided on the portion of the third side surface of the second base frame that is on the side of the first base frame, and a second stepped portion provided on the second opposing surface. When the first hinge moves in the thickness direction of the first base frame in the unfolded state of the base material, at least a portion of the first rotation shaft is housed in the first housing portion, at least a portion of the first rotation shaft is housed in the second housing portion, the first projection is positioned in the second step portion, and the second projection is positioned in the first step portion. Substrate material.

3. A third base frame is rotatably connected to the second base frame, The second base frame further comprises a second hinge that rotatably connects the third base frame to the second base frame, The third base frame includes a fifth side located on the second base frame side and a sixth side opposite to the fifth side when the base material is unfolded. The aforementioned base material has a folded state in which the second base frame is folded into the first base frame and the third base frame is folded into the second base frame, The system has a deployed state in which the second base frame is deployed relative to the first base frame and the third base frame is deployed relative to the second base frame, In the unfolded state, the faces of the first base frame, the second base frame, and the third base frame that constitute one of the front and back surfaces of the base material are defined as the first surface. In the unfolded state, the surfaces of the first base frame, the second base frame, and the third base frame that constitute the other surface of the base material (the front and back surfaces) are defined as the second surface. The aforementioned second hinge is, A third fixing portion is fixed to the fourth side surface of the second base frame so as to be movable in the thickness direction of the second base frame, A fourth fixing portion is fixed to the fifth side surface of the third base frame so as to be movable in the thickness direction of the third base frame, It has a second rotating shaft that rotatably connects the third and fourth fixing parts, The first pivot axis of the first hinge is positioned on one side of the first surface and the second surface of the first and second base frame, respectively. The second pivot axis of the second hinge is positioned on the other side of the first and second surfaces of the second and third base frames, respectively. The base material according to claim 1.

4. A third base frame is rotatably connected to the second base frame, The second base frame further comprises a second hinge that rotatably connects the third base frame to the second base frame, The third base frame includes a fifth side located on the second base frame side and a sixth side opposite to the fifth side when the base material is unfolded. The aforementioned base material has a folded state in which the second base frame is folded into the first base frame and the third base frame is folded into the second base frame, The system has a deployed state in which the second base frame is deployed relative to the first base frame and the third base frame is deployed relative to the second base frame, In the unfolded state, the faces of the first base frame, the second base frame, and the third base frame that constitute one of the front and back surfaces of the base material are defined as the first surface. In the unfolded state, the surfaces of the first base frame, the second base frame, and the third base frame that constitute the other surface of the base material (the front and back surfaces) are defined as the second surface. The aforementioned second hinge is, A third fixing portion is fixed to the fourth side surface of the second base frame so as to be movable in the thickness direction of the second base frame, A fourth fixing portion is fixed to the fifth side surface of the third base frame so as to be movable in the thickness direction of the third base frame, It has a second rotating shaft that rotatably connects the third and fourth fixing parts, The first pivot axis of the first hinge is positioned on one side of the first surface and the second surface of the first and second base frame, respectively. The second pivot axis of the second hinge is positioned on the other side of the first and second surfaces of the second and third base frames, respectively. The base material according to claim 2.

5. A method for constructing the base of a building wall, The base material according to any one of claims 1 to 4 is provided with an unfolding step of unfolding it from a folded state. Construction method.

6. A method for constructing the base of a building wall, A step of unfolding the base material according to claim 1 or 3 from a folded state, The method includes a housing step of housing the first protrusion and the second protrusion in the space formed by the first housing portion of the first base frame and the second housing portion of the second base frame by applying an external force to the first protrusion and the second protrusion, Construction method.

7. A method for constructing the base of a building wall, A step of unfolding the base material according to claim 2 or 4 from a folded state, The device includes a housing step of applying external force to the first and second protrusions to position the second protrusion on the first step of the first base frame and the first protrusion on the second step of the second base frame, Construction method.

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