Substrate reinforcing member, substrate, ceiling structure, and method for attaching surface member

Abstract

To provide a substrate reinforcing member, a substrate material, a ceiling structure, and a surface material mounting method capable of easily mounting a surface material to the substrate material.SOLUTION: The substrate reinforcing member 30 is assembled inside the substrate material 2 to which the face material 3 is attached. The substrate reinforcing member 30 has a body part 31 extending long, and a first extension part 32 and a second extension part 33 extending in a direction orthogonal to an extension direction from both ends in the extension direction of the body part 31, respectively. The body part 31 extends in the mounting direction of the face material 3, and the first extension part 32 and the second extension part 33 can support the inner surface of the substrate material 2 in the mounting direction of the face material 3.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a base reinforcement member, a base material, a ceiling structure, and a surface material mounting method, and more particularly to a base reinforcement member, a base material, a ceiling structure, and a surface material mounting method that are assembled inside a base material to which a surface material is to be mounted. [Background technology]

[0002] The ceiling structure attached to the building frame is constructed by attaching a ceiling surface material such as gypsum board to a ceiling base material made of, for example, a lightweight steel frame. The ceiling surface material is attached to the ceiling base material with fasteners such as screws.

[0003] For example, Patent Document 1 discloses a ceiling panel frame (base material) consisting of a pair of main members (runner members) that are attached to the building's structural frame, such as beams, and multiple connecting members (connecting members) that connect the pair of main members. Furthermore, Patent Document 2 discloses a ceiling underlayment structure (underlayment material) consisting of a pair of rafter supports (runner members) attached to the building frame and multiple rafters (connecting members) that connect the pair of rafter supports. The ceiling finishing surface material is attached to the bottom surface of the rafters with fixings such as screws. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2023-183475 [Patent Document 2] Patent Publication No. 2021-134487 Summary of the Invention [Problem to be solved by the invention]

[0005] When attaching a ceiling panel to the bottom surface of a ceiling underlayment such as those described in Patent Documents 1 and 2, it is necessary to drive fasteners such as screws in the direction of installation of the panel. Typically, ceiling underlayments are made of steel studs with, for example, a C-shaped or rectangular cross section, and therefore have internal spaces. Therefore, when driving fasteners such as screws in the direction of installation of the panel, there is a risk that the ceiling underlayment will be crushed, making it difficult to penetrate the screws. In particular, because the rigidity of the overlapping thin steel plates in the runner member is relatively low, there is a risk that the steel plates will slip away when the screws are driven, making it difficult to drive the screws properly.

[0006] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a base reinforcement member, a base material, a ceiling structure, and a surface material attachment method that allow a surface material to be easily attached to a base material. [Means for solving the problem]

[0007] The above problem is solved by the base reinforcement member of the present invention, which is a base reinforcement member that is assembled inside a base material to which a face material is attached, and has a main body portion that extends longitudinally, and a first extension portion and a second extension portion that extend from both ends of the main body portion in the extension direction in a direction perpendicular to the extension direction, wherein the main body portion extends in the attachment direction of the face material, and the first extension portion and the second extension portion are capable of supporting the inner surface of the base material in the attachment direction of the face material.

[0008] With the above configuration, by assembling the base reinforcement member inside the base material, when attaching the face material to the base material, the base reinforcement member can abut against the inner surface of the base material to support the base material, thereby preventing the base material from being crushed by the fixing device and making it easy to attach the face material to the base material.

[0009] In this case, the first extension portion and the second extension portion may extend in the same direction from both end portions of the main body portion in the extension direction. With the above configuration, the base reinforcement member can be easily assembled inside the base material by pushing the base reinforcement member against the inner surface of the base material in a direction opposite to the extension direction of the first extension portion and the second extension portion.

[0010] In this case, the main body portion can be switched between a support state in which the first extension portion and the second extension portion abut against the inner surface of the base material to support the base material, and an assembly state in which at least one of the first extension portion and the second extension portion is brought closer to the main body portion side so that it can be assembled inside the base material. With the above configuration, the length of the main body in the extension direction is small in the assembled state, so that the main body can be easily assembled to the base material.

[0011] In this case, the main body portion has a first main body portion having the first extension portion and extending in the extension direction of the main body portion, a second main body portion having the second extension portion and being rotatably connected to the first main body portion and extending in the extension direction, a biasing portion that biases the main body portion from the assembled state to the supported state, a first regulating portion that is formed at the end of the first main body portion on the second main body portion side and extends on the opposite side from the first extension portion, and a second regulating portion that is formed at the end of the second main body portion on the first main body portion side and extends on the opposite side from the second extension portion, and the second regulating portion is maintained in the supported state by the biasing force of the biasing portion abutting the second regulating portion to the first regulating portion. With the above-described configuration, the second body portion can be rotated relative to the first body portion, which makes it easier to assemble the body portion to the base material. In addition, the body portion is maintained in a supported state by the biasing force, which improves the support force for the base material.

[0012] In this case, the first extension portion and the second extension portion may extend in opposite directions from both ends of the main body portion in the extension direction. With the above configuration, the base reinforcement member can be easily assembled inside the base material by pressing the main body portion against the inner surface of the base material while rotating it in the extension direction.

[0013] The above problem is solved by the base material of the present invention, which is a base material having a base reinforcement member, comprising a pair of runner members arranged at a predetermined distance and extending longitudinally, and a connecting member connecting the pair of runner members, the runner members comprising a first runner attached to the building's main body, and a second runner connected to the connecting end of the connecting member and attached inside the first runner, and the first extension portion and the second extension portion of the base reinforcement member extend along the length of the runner member and abut against the inner surface of the first runner or the second runner in the extension direction. With the above-described configuration, by assembling the base reinforcement member inside the base material, when attaching the face material to the base material, the base reinforcement member abuts against the inner surface of the base material to support the base material. In particular, the face material can be easily attached to the area where the first runner and second runner overlap, which has a relatively low rigidity.

[0014] In this case, the second runner has a connecting surface that is connected to the connecting end of the connecting member and a recess that is recessed from the connecting surface toward the connecting member, and the base reinforcement member has a convex portion that protrudes from the main body portion in the width direction of the main body portion and engages with the recess. With the above configuration, the contact area between the base reinforcing member and the base material increases, thereby improving the support force of the base reinforcing member against the base material.

[0015] The above problem is solved by the ceiling structure of the present invention, which comprises a base material and a face material attached to the underside of the base material, and the face material is attached to the underside of the base material with fasteners, with the upper and lower ends of the base reinforcement member abutting the inner surface of the second runner of the base material. With the above configuration, a ceiling structure can be obtained in which the ceiling surface material is suitably attached to the ceiling base material.

[0016] According to the surface material mounting method of the present invention, the above problem is solved by a surface material mounting method in which a surface material is mounted to a base material using a base reinforcement member that is assembled inside the base material, the method including an assembly process in which the base reinforcement member is assembled to the base material, and an attachment process in which the surface material is attached to the base material to which the base reinforcement member is assembled using a fastener, and in the attachment process, the surface material is attached to the base material with both ends of the base reinforcement member abutting the inner surface of the base material in the mounting direction of the surface material. With the above configuration, by assembling the base reinforcement member inside the base material, when attaching the face material to the base material, the base reinforcement member can abut against the inner surface of the base material to support the base material, thereby preventing the base material from being crushed by the fixing device and making it easy to attach the face material to the base material. [Effects of the Invention]

[0017] According to the base reinforcement member, base material, ceiling structure, and surface material mounting method of the present invention, the surface material can be easily mounted to the base material. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of a ceiling structure provided with a base reinforcement member according to a first embodiment; [Figure 2] FIG. 10 is a diagram illustrating how a face material is attached to a base material. [Figure 3] FIG. 10 is a diagram showing the state in which the base reinforcing member is assembled to the base material. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 4 is a side view of the base reinforcing member, showing a supported state. [Figure 7] FIG. 4 is a side view of the base reinforcing member, showing an assembled state. [Figure 8] 10A and 10B are diagrams illustrating how a base reinforcing member is attached to a base material. [Figure 9] FIG. 1 is a process diagram of a surface material mounting method. [Figure 10] 10 is a diagram showing the state in which a base reinforcing member of the second embodiment is assembled to a base material. FIG. [Figure 11] FIG. 10 is a front view of a base reinforcing member according to a second embodiment. [Figure 12] FIG. 10 is a side view of a base reinforcing member according to a second embodiment. [Figure 13] 10A and 10B are diagrams illustrating how a base reinforcing member according to a second embodiment is assembled to a base material. DETAILED DESCRIPTION OF THE INVENTION

[0019] A ceiling structure 1 according to one embodiment of the present invention (hereinafter referred to as the present embodiment) will be described below with reference to FIGS. In the following description, as shown by the arrows in Figure 1, the "up-down direction" refers to the vertical direction of the building, and coincides with the "mounting direction of the surface material" in which the surface material 3 is attached to the base material 2 and the "extension direction of the main body" of the base reinforcement member 30. In addition, the "front-rear direction" coincides with the "length direction of the runner member" of the base material 2, the "longitudinal direction" of the surface material 3, and the "thickness direction of the main body" of the base reinforcement member 30. The "width direction" also coincides with the "width direction of the runner member" of the base material 2, the "short side direction" of the face material 3, and the "width direction of the main body" of the base reinforcement member 30. The "width direction" is perpendicular to the "up-down direction" and the "front-rear direction."

[0020] <Ceiling structure> As shown in Figure 1, the ceiling structure 1 is a structure that is attached to the skeleton of a building and forms the ceiling. The ceiling structure 1 comprises a base material 2 that serves as the base for the ceiling, and a surface material 3 that serves as the finishing material for the ceiling. The ceiling structure 1 is constructed by attaching the surface material 3 from below to the bottom surface of the base material 2 that has been installed on the skeleton of the building. As shown in Figure 2, the surface material 3 is attached to the base material 2 by driving fixing devices 4 such as screws into it from below. It is not limited to the case where the face material 3 is attached from below to the bottom surface of the base material 2 installed on the building frame, but the face material 3 may be attached from above to the base material 2 and then the ceiling structure 1 may be installed on the building frame. Also, the base material 2 is not limited to the case where it is directly attached to the building frame, but may be installed using hanging bolts.

[0021] <Base material> 1, the base material 2 is a frame material made of, for example, a lightweight steel frame, and has a pair of runner members 10 extending longitudinally, a plurality of connecting members 20 connecting the pair of runner members 10, and a base reinforcing member 30 assembled inside the runner members 10. A face material 3 is attached to the bottom surface of the base material 2 from below. A plurality of base reinforcing members 30 are assembled inside the base material 2. The base reinforcing members 30 are assembled at the connecting positions between the runner member 10 and the connecting member 20, but the assembly positions and number are not limited to this.

[0022] <<Runner parts>> As shown in Fig. 1, the runner members 10 extend longitudinally along the longitudinal direction (front-to-back direction) of the face material 3 and are arranged at a predetermined interval. In other words, a pair of runner members 10 are arranged at a predetermined interval in the short direction of the face material 3. The runner members 10 are elongated members having an internal space. A plurality of base reinforcing members 30 are attached inside the runner members 10.

[0023] 2, each of the pair of runner members 10 has a first runner 11 attached to the building frame, and a second runner 12 connected to the connecting end 20a of the connecting member 20 and attached to the inside of the first runner 11. A base reinforcing member 30 is assembled inside the second runner 12. The runner member 10 is formed by combining the first runner 11 and the second runner 12, but is not limited to this. For example, the runner member 10 may be a hollow rectangular tubular member having a rectangular cross section.

[0024] 2, the first runner 11 has, for example, a generally C-shaped cross section and is a runner material formed by bending a steel plate. The first runner 11 has a mounting surface 11a that is attached to the building frame, a first upper wall 11b that extends from the upper end of the mounting surface 11a toward the connecting member 20, and a first lower wall 11c that extends from the lower end of the mounting surface 11a toward the connecting member 20. The first lower wall 11c extends longer in the width direction of the runner member 10 than the first upper wall 11b.

[0025] As shown in Fig. 2, the second runner 12 is a cross-section member formed by bending a steel plate, for example, having a generally inverted C-shaped cross section. The second runner 12 has a connecting surface 12a connected to the connecting end 20a of the connecting member 20, a recess 12b recessed from the connecting surface 12a toward the connecting member 20, a second upper wall 12c extending from the upper end of the recess 12b toward the opposite side from the connecting member 20, and a second lower wall 12d extending from the lower end of the connecting surface 12a toward the opposite side from the connecting member 20. The extending end of the second upper wall 12c is bent and extends downward. The extending end of the second lower wall 12d is bent and extends upward.

[0026] The second runner 12 is disposed in an internal space surrounded by the mounting surface 11a, the first upper wall 11b, and the first lower wall 11c of the first runner 11. At this time, the first upper wall 11b and the second upper wall 12c face each other in the vertical direction, and the first lower wall 11c and the second lower wall 12d face each other. Furthermore, a base reinforcing member 30 is disposed in the internal space surrounded by the connecting surface 12a of the second runner 12, the recess 12b, the second upper wall 12c, and the second lower wall 12d.

[0027] <<Connecting parts>> As shown in Fig. 1, the connecting member 20 is, for example, a stud material having a generally U-shaped cross section and formed by bending a steel plate. A plurality of connecting members 20 are provided to connect a pair of runner members 10. A connecting end 20a of each connecting member 20 is fixed to the connecting surface 12a of the second runner 12 by welding or screws. Note that the connecting members 20 may also be connected to each other in the front-rear direction.

[0028] <<Base reinforcement material>> 1, the base reinforcing member 30 is, for example, a steel plate-like member, and is assembled inside the base material 2 to which the face material 3 is attached. Specifically, the base reinforcing member 30 is assembled inside the second runner 12 of the runner member 10. 2, when the face material 3 is attached to the base material 2 with the fasteners 4, the base reinforcement member 30 abuts against the inner surface of the base material 2 in the vertical direction, and supports the base material 2 by bracing it in the vertical direction. Therefore, when an operator drives the fasteners 4 into the base material 2 and the face material 3 from below with a tool M, the base reinforcement member 30 braces and supports the base material 2, thereby preventing the base material 2 from being crushed in the attachment direction of the face material 3. In other words, the base reinforcement member 30 is formed separately from the base material 2 and is configured as a reinforcing rib that is attached to the base material 2 and reinforces the base material 2.

[0029] As shown in Figures 2 to 8, the base reinforcement member 30 has a main body portion 31 that extends longitudinally, a first extension portion 32 and a second extension portion 33 that extend from both ends of the main body portion 31 in the extension direction in a direction perpendicular to the extension direction (front-to-back direction), and a protrusion 34 that protrudes from the main body portion 31 in the width direction of the main body portion 31 and engages with the recess 12b.

[0030] As shown in FIG. 2, when the base reinforcing member 30 is attached to the base material 2, the main body 31 extends in the mounting direction of the face material 3 and supports the base material 2 by bracing it in the vertical direction. The main body 31 is switchable between a support state (FIGS. 3 and 6) in which the first extension portion 32 and the second extension portion 33 abut against the inner surface of the base material 2 to support the base material 2, and an assembly state (FIGS. 7 and 8) in which at least one of the first extension portion 32 and the second extension portion 33 is moved closer to the main body 31 so that the main body 31 can be assembled inside the base material 2. In other words, the main body 31 is configured to be bendable in the vertical direction from the support state so that the vertical separation distance between the first extension portion 32 and the second extension portion 33 becomes smaller. Therefore, by bending the main body 31, the worker can easily assemble it inside the second runner 12.

[0031] 3, the first extension portion 32 and the second extension portion 33 are, for example, plate-like members, and extend in the same direction from both ends of the body portion 31 in the extension direction. Specifically, the first extension portion 32 bends from the upper end portion 31a of the body portion 31 and extends forward. The second extension portion 33 bends from the lower end portion 31b of the body portion 31 and extends forward. 2 and 3, the first extension portion 32 and the second extension portion 33 can support the inner surface of the base material 2 in the extension direction (vertical direction). Specifically, when the base reinforcement member 30 is assembled to the base material 2, the first extension portion 32 abuts against the second upper wall 12c of the second runner 12, and the second extension portion 33 abuts against the second lower wall 12d.

[0032] 3, the protrusion 34 is, for example, a plate-shaped member that extends from the main body 31 so as to protrude in the width direction of the main body 31. When the base reinforcement member 30 is assembled to the base material 2, the protrusion 34 engages with the recess 12b of the second runner 12. In this way, the convex portions 34 and the concave portions 12b engage with each other, increasing the contact area between the base reinforcing member 30 and the base material 2. Therefore, the support force of the base reinforcing member 30 on the base material 2 can be improved.

[0033] As shown in Figures 3 to 7, the main body portion 31 has a first main body portion 35 and a second main body portion 36 extending in the extension direction, a biasing portion 37 that biases the main body portion 31 from the assembled state to the supported state, a first regulating portion 38 formed at the lower end portion 35a (end portion on the second main body portion side) of the first main body portion 35 on the second main body portion 36 side, and a second regulating portion 39 formed at the upper end portion 36a (end portion on the first main body portion side) of the second main body portion 36 on the first main body portion 35 side. The second restricting portion 39 abuts against the first restricting portion 38 due to the biasing force of the biasing portion 37, so that the main body portion 31 is maintained in a supported state.

[0034] The first main body portion 35 is, for example, a plate-like member having a rectangular shape when viewed from the front, and extends in the vertical direction. A first extension portion 32 is provided at the upper end of the first main body portion 35. A first restriction portion 38 is provided at the lower end 35a of the first main body portion 35. A biasing portion 37 is welded to the front surface of the first main body portion 35. A protrusion 34 is formed at the upper portion of the first main body portion 35. The first extension portion 32 is bent from the upper end of the first main body portion 35 and the upper end of the protrusion 34 and extends forward.

[0035] The second main body portion 36 is, for example, a plate-like member having a rectangular shape when viewed from the front and extending in the vertical direction. A second extension portion 33 is provided at the lower end of the second main body portion 36. A second restriction portion 39 is provided at the upper end 36a of the second main body portion 36. A biasing portion 37 is welded to the front surface of the second main body portion 36. The second main body portion 36 is rotatably connected to the first main body portion 35. At this time, the front surface of the first main body portion 35 and the front surface of the second main body portion 36 are connected so as to be substantially flush with each other.

[0036] The biasing portion 37 is a coil spring that connects the first body portion 35 and the second body portion 36. The biasing portion 37 may be a biasing member other than a coil spring, such as a leaf spring. The upper end of the biasing portion 37 is welded to the first body portion 35 by an upper weld 37a. The lower end of the biasing portion 37 is welded to the second body portion 36 by a lower weld 37b. More specifically, both ends of the biasing portion 37 in the vertical direction are covered by rectangular plate members that are elongated in the width direction, and the biasing portion 37 is welded and attached to the first body portion 35 and the second body portion 36 together with the plate members. Covering both ends of the biasing portion 37 with plate members can further increase the rigidity of the first body portion 35 and the second body portion 36. As shown in FIGS. 7 and 8 , the worker can switch the main body 31 from the support state to the assembly state by bringing the first extension 32 and the second extension 33 closer together against the biasing force of the biasing portion 37. Then, in the assembly state, the worker assembles the base reinforcement member 30 into the second runner 12 of the runner member 10. When the base reinforcement member 30 is assembled to the base material 2, the main body 31 is switched from the assembly state to the support state by the biasing force of the biasing portion 37 and abuts against the second runner 12 in the vertical direction. In the support state, the main body 31 may abut against the second runner 12 in the width direction to increase the contact area. Specifically, one end of the main body 31 in the width direction may abut against the connecting surface 12a, and the other end may abut against the bent extending end of the second lower wall 12d.

[0037] The first restricting portion 38 is a portion that protrudes rearward from the lower end portion 35a of the first main body portion 35, and extends on the opposite side to the first extending portion 32. The protruding end portion 38a of the first restricting portion 38 extends in a curved manner so as to fold back.

[0038] The second restricting portion 39 is a portion that protrudes rearward from the upper end portion 36a of the second main body portion 36, and extends on the opposite side from the second extending portion 33. The rear end portion 39a of the second restricting portion 39 is covered from behind by the protruding end portion 38a of the first restricting portion 38. In this way, the protruding end portion 38a of the first restricting portion 38 is arranged to cover the rear end portion 39a of the second restricting portion 39, so that it is possible to prevent the first main body portion 35 and the second main body portion 36 from becoming misaligned when the main body portion 31 is in the supported state.

[0039] As shown in FIG. 6, when the main body portion 31 is in the supported state, the first main body portion 35 and the second main body portion 36 are maintained in the supported state by the first restricting portion 38 and the second restricting portion 39 abutting against each other. Also, as shown in Figures 7 and 8, when assembling the base reinforcement member 30 to the base material 2, the first main body portion 35 and the second main body portion 36 are bent so that the first extension portion 32 and the second extension portion 33 approach each other. When the base reinforcement member 30 is assembled to the base material 2, the biasing force of the biasing portion 37 causes the first main body portion 35 and the second main body portion 36 to assume an upright supporting state as shown in FIG.

[0040] In this way, the length of the main body portion 31 in the extension direction is small in the assembled state, so that the main body portion 31 can be easily assembled to the base material 2. Furthermore, after the base reinforcement member 30 is assembled to the base material 2, the first main body portion 35 and the second main body portion 36 stand upright and the first restricting portion 38 and the second restricting portion 39 abut against each other, so that the support force of the base reinforcement member 30 to the base material 2 is improved. Therefore, as shown in FIG. 2, when the face plate 3 is attached to the base plate 2, the base reinforcing member 30 can abut against the inner surface of the base plate 2 and support the base plate 2.

[0041] In addition, the assembled state of the main body portion 31 is not limited to the state in which the main body portion 31 is bent in the vertical direction (the state in which the second main body portion 36 rotates relative to the first main body portion 35 and the first extension portion 32 and the second extension portion 33 approach each other). For example, the vertical length of the main body 31 may be changed by sliding the second main body 36 relative to the first main body 35. Alternatively, the vertical length of the main body 31 may be changed by threading the second main body 36 to the first main body 35 and rotating the second main body 36 about an axis in the vertical direction.

[0042] <How to attach the surface material> Here, we will explain a surface material attachment method for attaching a surface material 3 to a base material 2 using a base reinforcement member 30 that is assembled inside the base material 2. As shown in Figure 9, the surface material attachment method includes an "assembly process (S1)" for assembling the base reinforcement member 30 to the base material 2, and an attachment process "attachment process (S2)" for attaching the surface material 3 to the base material 2 to which the base reinforcement member 30 has been assembled using fasteners 4. Note that explanations of processes other than those mentioned above when constructing a ceiling structure 1 will be omitted.

[0043] In the "assembly step (S1)," as shown in Fig. 8, the worker assembles the base reinforcement member 30 in an assembled state to the base material 2. Specifically, the worker rotates the second main body portion 36 relative to the first main body portion 35 against the biasing force of the biasing portion 37, so that the first extension portion 32 and the second extension portion 33 approach each other, creating an assembled state. Then, the worker assembles the base reinforcement member 30 inside the second runner 12, with the main body portion 31 left in the assembled state. In this way, since the length of the main body portion 31 in the extension direction is small in the assembled state, the main body portion 31 of the base reinforcing member 30 can be easily assembled to the base material 2.

[0044] In the "attaching step (S2)", as shown in FIG. 2, the worker attaches the face material 3 to the base material 2 in the attachment direction of the face material 3, with both ends of the base reinforcement member 30 abutting against the inner surface of the base material 2. Specifically, the worker abuts the face material 3 against the first lower wall 11c of the first runner 11, and drives the fastener 4 into the face material 3 from below using a tool M. At this time, the fastener 4 is driven so as to penetrate the face material 3, the first lower wall 11c of the first runner 11, and the second lower wall 12d of the second runner 12. At this time, the base reinforcement member 30 supports the runner member 10 by pushing it from the inside, thereby suppressing deformation of the first lower wall 11c of the first runner 11 and the second lower wall 12d of the second runner 12, and allowing the surface material 3 to be suitably attached to the base material 2.

[0045] In this way, by assembling the base reinforcement member 30 inside the base material 2, when attaching the face material 3 to the base material 2, the base reinforcement member 30 can abut against the inner surface of the base material 2 and support the base material 2. This prevents the base material 2 from being crushed by the fixing device 4, and makes it easy to attach the face material 3 to the base material 2.

[0046] <Base reinforcing member of second embodiment> Next, a base reinforcing member 40 according to a second embodiment will be described with reference to FIGS. The description of the same contents as those of the base reinforcing member 30 described above will be omitted.

[0047] As shown in Figure 10, the base reinforcement member 40 has a main body portion 41 that extends longitudinally, a first extension portion 42 and a second extension portion 43 that extend from both ends of the main body portion 41 in the extension direction in a direction perpendicular to the extension direction (front-to-back direction), and a protrusion 44 that protrudes from the main body portion 41 in the width direction of the main body portion 41 and engages with the recess 12b. 10 to 12, the main body 41 is a single plate-like member that extends in the mounting direction of the face material 3 when the base reinforcement member 40 is assembled to the base material 2, and supports the base material 2 by being stretched in the vertical direction. The base reinforcement member 40 supports the base material 2 by having the first extension portion 42 and the second extension portion 43 abut against the inner surface of the base material 2.

[0048] 12, the first extension portion 42 and the second extension portion 43 are, for example, plate-like members, and extend in opposite directions from both ends of the body portion 41 in the extension direction. Specifically, the first extension portion 42 bends from the upper end portion 41a of the body portion 41 and extends forward. The second extension portion 43 bends from the lower end portion 41b of the body portion 41 and extends rearward. The first extending portion 42 is bent from the upper end portion 41a of the main body portion 41 and the upper end portion of the protruding portion 44 and extends forward.

[0049] 13, the base reinforcement member 40 is assembled inside the base material 2 by pushing the main body 41 in so as to rotate it in the vertical direction. If necessary, a worker can assemble it inside the base material 2 by hitting the upper part of the main body 41 from the front (or hitting the lower part of the main body 41 from the rear) with a tool such as a hammer. 10, when the base reinforcement member 40 is assembled to the base material 2, the first extension portion 42 abuts against the second upper wall 12c of the second runner 12, and the second extension portion 43 abuts against the second lower wall 12d. In this way, by making the base reinforcement member 40 a single plate-like member, the support force of the base material 2 can be improved with a simple configuration.

[0050] <Other embodiments> In this embodiment, the base material 2 and base reinforcing member 30 are described as constituting the ceiling structure 1. However, the base material 2 may be a base other than a ceiling, for example, a base for a partition wall or the like.

[0051] In the above embodiment, the base reinforcement member, base material, ceiling structure, and surface material mounting method according to the present invention have been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention naturally includes equivalents thereof. In particular, the above-described embodiments are merely examples and do not limit the present invention. [Explanation of symbols]

[0052] 1 Ceiling structure 2 Undercoat 3-sided material 4 Fixtures 10 Runner member 11 First Runner 11a Mounting surface 11b First upper wall 11c First lower wall 12 Second Runner 12a Connecting surface 12b Recess 12c Second upper wall 12d Second lower wall 20 Connecting member 20a Connecting end 30 Base reinforcement member 31 Main body 31a Upper end 31b Lower end 32 First extension part 33 Second extension part 34 Convex part 35 First body part 35a Lower end (end on the second main body side) 36 Second body part 36a Upper end (end on the first body side) 37. Subordinate Department 37a upper welding part 37b lower welding part 38 First Regulatory Department 38a Protruding end 39 Second Regulatory Department 39a Rear end 40 Underground reinforcement components 41 Body part 41a Upper end 41b Lower end 42 The first extension in the department 43 The second extension in the department 44 convex part M tools

Claims

1. A base reinforcing member that is assembled inside a base material to which a face material is attached, A main body portion extending in an elongated direction; a first extension portion and a second extension portion extending from both end portions in an extension direction of the main body portion in a direction perpendicular to the extension direction, The main body portion extends in the mounting direction of the face material, A base reinforcement member characterized in that the first extension portion and the second extension portion are capable of supporting the inner surface of the base material in the installation direction of the face material.

2. The base reinforcing member according to claim 1 , wherein the first extension portion and the second extension portion extend in the same direction from both end portions of the main body portion in the extension direction.

3. The base reinforcement member described in claim 2, characterized in that the main body portion can be switched between a support state in which the first extension portion and the second extension portion abut against the inner surface of the base material to support the base material, and an assembly state in which at least one of the first extension portion and the second extension portion is brought closer to the main body portion side so that it can be assembled inside the base material.

4. The main body portion is a first main body portion provided with the first extension portion and extending in the extension direction of the main body portion; a second main body portion provided with the second extension portion, rotatably connected to the first main body portion, and extending in the extension direction; a biasing portion that biases the main body portion from the assembled state to the supported state; a first restricting portion formed at an end of the first main body portion on the second main body portion side and extending in a direction opposite to the first extending portion; a second restricting portion formed at an end of the second main body portion on the first main body portion side and extending in a direction opposite to the second extending portion, The base reinforcing member according to claim 3, wherein the second restricting portion is brought into contact with the first restricting portion by the biasing force of the biasing portion, thereby maintaining the supporting state.

5. The base reinforcing member according to claim 1 , wherein the first extension portion and the second extension portion extend in opposite directions from both ends of the main body portion in the extension direction.

6. A base material having the base reinforcing member according to any one of claims 1 to 5, a pair of runner members arranged at a predetermined interval and extending longitudinally; a connecting member that connects the pair of runner members, The runner member is The first runner is attached to the building's frame, a second runner connected to the connecting end of the connecting member and attached to the inside of the first runner, A base material characterized in that the first extension portion and the second extension portion of the base reinforcement member extend along the longitudinal direction of the runner member and abut against the inner surface of the first runner or the second runner in the extension direction.

7. the second runner has a connecting surface connected to the connecting end portion of the connecting member and a recess recessed from the connecting surface toward the connecting member, 7. The base material according to claim 6, wherein the base reinforcing member has a protrusion that protrudes from the main body in a width direction of the main body and engages with the recess.

8. A ceiling structure comprising the base material according to claim 6 and the face material attached to the underside of the base material, A ceiling structure characterized in that the surface material is attached to the underside of the base material with fasteners, with the upper and lower ends of the base reinforcement member abutting the inner surface of the second runner of the base material.

9. A method for attaching a surface material to a base material using a base reinforcing member assembled inside the base material, comprising: an assembling step of assembling the base reinforcing member to the base material; and an attachment step of attaching the face material to the base material to which the base reinforcing member is attached using a fastener, A surface material mounting method characterized in that, in the mounting process, the surface material is mounted to the base material with both ends of the base reinforcement member abutting the inner surface of the base material in the mounting direction of the surface material.

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