Structure for attaching lower brace of suspension ceiling and method for attaching lower brace

Abstract

To provide a structure for attaching a lower brace of a suspension ceiling that can be easily attached while also improving strength at its attachment portion, and a method for attaching a lower brace.SOLUTION: A structure for attaching a lower part of a suspension ceiling brace comprises a lower brace fixing member 20 fixed to an upper part of a main frame 3 (sub frame 3A), a brace receiving member 11 fixed to the lower brace fixing member 20 and having a brace receiving plate 11a extending in a parallel direction and a vertical direction to the main frame 3 (sub frame 3A), and a brace lid member 12 connected to the brace receiving member 11 and having a brace lid plate 12a extending in a direction substantially parallel to the brace receiving plate 11a. It fastens the brace receiving member 11 and the brace lid member 12 together with screws while holding a lower end of a brace material 7 between the brace receiving plate 11a and the brace lid plate 12a, and fixes the brace material 7 by screws.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a brace lower mounting structure and brace lower mounting method for a suspended ceiling. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a suspended ceiling is known in which a ceiling panel is installed via ceiling material support members arranged in a lattice pattern and connected to the lower ends of suspension bolts suspended from the building frame. In this type of suspended ceiling, in order to increase strength against lateral shaking that occurs during an earthquake, a structure is known in which a brace material, the upper end of which is attached to the suspension base side of the suspension bolt, is connected to the ceiling material support member (see, for example, Patent Documents 1, 2 and 3).

[0003] The reinforcing bracket for a suspended ceiling described in Patent Document 1 is formed in the area from the hanging bolt to the ceiling material support member and has a reinforcing surface portion that is attached along the ceiling material support member, and a recess is provided in the center of the edge direction on the lower end side of the reinforcing surface portion, and a structure is disclosed in which the reinforcing surface portion that is hooked onto both ceiling material support members that are arranged in a lattice pattern across the ceiling material support members also serves as a brace mounting portion.

[0004] The technology described in Patent Document 2 discloses a structure in which the lower end of the brace is sandwiched and fixed between a siding support supported by a hanging bolt via a hanger and a siding support reinforcement material arranged parallel to the siding support. In other words, a structure is disclosed in which the lower end of the brace is sandwiched and fixed between a siding support fixed onto the siding and a siding support reinforcement material arranged on the side of the siding support where the hanger is located.

[0005] The technology described in Patent Document 3 discloses a structure in which the lower end of a brace material is fixed with screws between a pair of retaining plate portions arranged opposite each other across the web portion of a ceiling material support member. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 4806239 [Patent Document 2] Patent No. 6133184 [Patent Document 3] JP 2023-83636 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, the structure described in Patent Document 1 has a structure in which the reinforcing surface of the reinforcing bracket is hung on both ceiling material support members which are arranged in a lattice pattern across the ceiling material support members, and one side of the brace material is attached to the reinforcing surface, which raises concerns that the strength is insufficient and installation is troublesome.

[0008] The structure described in Patent Document 2 involves fixing the lower end of the brace by sandwiching it between a sill support supported by a hanging bolt via a hanger and a sill support reinforcement material arranged parallel to the sill support.As the sill support is fixed on top of the sill, there are concerns that installation may be troublesome.

[0009] The structure described in Patent Document 3 involves fixing the lower end of the brace material with screws between a pair of retaining plates arranged opposite each other across the web portion of the ceiling material support member, and the spacing between the pair of retaining plates needs to be designed to match the width of the brace material in the thickness direction, and there is a concern that it will be time-consuming to set, i.e., insert and attach the brace material between the pair of retaining plates designed to match the width dimension.

[0010] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a brace lower mounting structure and brace lower mounting method for a suspended ceiling that improves the strength of the brace mounting portion and makes mounting easier. [Means for solving the problem]

[0011] In order to solve the above problems, the present invention is based on a brace lower mounting structure and brace lower mounting method for a suspended ceiling, in which the lower end of a brace material is connected to a ceiling material support member that is connected to the lower end of a hanging bolt.

[0012] The lower brace mounting structure for a suspended ceiling of the present invention comprises a lower brace fixing member fixed to the upper part of the ceiling material support member, a brace support member fixed on the lower brace fixing member and having a brace support plate portion extending parallel to and vertically to the ceiling material support member, and a brace cover member connected to the brace support member and having a brace cover plate portion extending approximately parallel to the brace support plate portion, and is characterized in that with the lower end of the brace material clamped between the brace support plate portion and the brace cover plate portion, the brace support member and the brace cover member are screwed together, and the brace material is fixed by screwing (Claim 1).

[0013] With this configuration, the lower end of the brace material can be fixed from both sides by screws while the lower brace fixing member and the brace support member are fixed and the lower brace fixing member is fixed to the ceiling material support member. Also, with the lower brace fixing member and the brace support member fixed and the lower brace fixing member fixed to the ceiling material support member, the lower end of the brace material can be screwed to the brace support member, and the brace cover plate can be screwed to the brace support member and the lower end of the brace material.

[0014] In this invention, it is preferable that the lower brace fixing member is placed across the upper part of the ceiling material support member and fixed at both sides, and that the lower brace fixing member and the brace support member are fixed by a first fixing member and fixed to the ceiling material support member by a second fixing member (Claim 2).

[0015] By configuring in this manner, the lower brace fixing member and the ceiling material support member can be firmly fixed, and the brace support member can be firmly fixed.

[0016] In addition, in the present invention, it is preferable that the centers of the brace receiving member and the brace cover member are configured to approximately coincide with the intersection of the ceiling material support members which are connected to each other in a cross-shaped manner (claim 3). In this case, it is preferable that a notch is provided in the lower central portion of the brace support member and the brace cover member, and that a hanging bolt is formed so that it can be connected to the intersection of the ceiling material support member through the notch (Claim 4).

[0017] By configuring it in this manner, the centers of the brace support member and the brace cover member approximately coincide with the intersection of the ceiling material support members which are connected to each other in a cross-shaped manner, allowing the brace support member and the brace cover member to be installed in a stable state. In this case, a notch is provided in the lower central portion of the brace support member and the brace cover member, and a hanging bolt is formed so that it can be connected to the intersection of the ceiling material support member through the notch, making it possible to attach the brace material with the hanging bolt in place.

[0018] In addition, in the present invention, it is preferable that a plurality of small holes for screw fastening are provided at predetermined intervals in the longitudinal and widthwise areas of the brace material in the brace support plate portion and the brace cover plate portion (Claim 5).

[0019] By configuring it in this manner, any small hole can be selected from the plurality of small holes and the lower end of the brace material can be attached at an appropriate position.

[0020] The method of installing the lower part of a brace to a suspended ceiling of the present invention is characterized in that it comprises the steps of preparing a lower brace fixing member fixed to the upper part of the ceiling material support member, a brace support member having a brace receiving plate portion extending parallel to and vertically from the ceiling material support member, and a brace cover member having a brace cover plate portion extending approximately parallel to the brace receiving plate portion, and fixing the lower brace fixing member and the brace support member, fixing the lower brace fixing member to the ceiling material support member, and screwing the lower end of the brace material to the brace support member, and then screwing the brace cover plate portion to the brace support member and to the lower end of the brace material (Claim 6).

[0021] By configuring in this manner, after fixing the lower brace fixing member and the brace support member, the lower brace fixing member can be fixed to the ceiling material support member, and the lower end of the brace material can be screwed to the brace support member.The brace cover plate portion can then be screwed to the brace support member and also screwed to the lower end of the brace material, thereby fixing the lower end of the brace material.

[0022] In this invention, when fixing the lower brace fixing member to the ceiling material support member, it is preferable that the lower brace fixing member is placed across the ceiling material support member and fixed at both sides, and is fixed onto the ceiling material support member together with the brace support member (Claim 7).

[0023] By configuring in this manner, the lower brace fixing member and the ceiling material support member can be firmly fixed, and the brace support member can be firmly fixed. Effect of the Invention

[0024] According to the present invention, as configured above, the following remarkable effects can be obtained.

[0025] (1) According to the invention described in claims 1 and 6, after the lower brace fixing member and the brace support member are fixed, the lower end of the brace material can be screwed to the brace support member while the lower brace fixing member is fixed to the ceiling support member, and then the brace cover plate portion can be screwed to the brace support member and the lower end of the brace material, so that the strength of the mounting portion of the brace can be improved and the mounting can be made easier. In addition, since the brace support member and the brace cover member are separate, the brace material can be mounted without friction and the length of the brace support member and the brace cover member can be increased. Therefore, the optimal axial force is transmitted to the brace material, and the strength can be improved. Furthermore, when the brace material is mounted to the brace support member, the brace material can be visually inspected while the brace material is being mounted, so the brace material can be adjusted in length and position, making the mounting work easier.

[0026] (2) According to the invention described in claims 2 and 7, the fixation between the lower brace fixing member and the ceiling material support member can be strengthened, and the fixation of the brace support member can be strengthened. Therefore, in addition to the above (1), the strength of the brace mounting part can be further improved.

[0027] (3) According to the invention described in claim 3, by approximately coinciding the centers of the brace support member and the brace cover member with the intersection of the ceiling material support members which are connected to each other in a cross-shaped manner, in addition to the above (1), the brace support member and the brace cover member can be further installed in a stable state. In this case, by providing a notch in the lower center of the brace receiving member and the brace cover member, and forming the suspension bolt to be connectable to the intersection of the ceiling material support member through the notch, it is possible to attach the brace material with the suspension bolt in place. Therefore, the brace material can be easily attached to an existing suspended ceiling afterwards (Claim 4).

[0028] (4) According to the invention described in claim 5, any small hole can be selected from among the multiple small holes, and the lower end of the brace material can be attached to an appropriate position. Therefore, the lower end of the brace material can be attached to an appropriate position while allowing for errors in the position of the brace material. [Brief description of the drawings]

[0029] [Figure 1] FIG. 2 is a schematic diagram showing the brace installation state of the suspended ceiling according to the present invention. [Figure 1A] 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a side view showing a state in which a ceiling material support member according to the present invention is connected in the intersecting XY directions. [Figure 1B] 1 is a perspective view showing an example of a ceiling material support member in the present invention. [Diagram 2] FIG. 4 is a front view along the Y direction showing the mounting state of the lower part of the brace in this invention. [Figure 2A] 1A is a cross-sectional view of a main part of the lower part of the brace in an installed state, and FIG. 1B is an enlarged cross-sectional view of part B of (a). [Diagram 3] FIG. 3 is a side view showing a part of FIG. 2 in cross section. [Figure 4] FIG. 4 is a front view taken along the X direction, showing a state in which a lower part of a brace is attached in this invention. [Diagram 5] FIG. 5 is a side view of FIG. [Figure 6] 1A is a front view, FIG. 1B is a plan view, and FIG. 1C is a side view of a brace receiving member according to the present invention. [Figure 6A] 7A is an enlarged cross-sectional view taken along line II in FIG. 6, FIG. 7B is an enlarged cross-sectional view taken along line II-II, FIG. 7C is an enlarged cross-sectional view taken along line III-III, and FIG. 7D is an enlarged cross-sectional view taken along line IV-IV in FIG. [Figure 7] 1A is a front view, FIG. 1B is a plan view, and FIG. 1C is a side view of a brace cover member according to the present invention. [Figure 7A] 8A is an enlarged cross-sectional view taken along line VV in FIG. 7, and FIG. 8B is an enlarged cross-sectional view taken along line VI-VI in FIG. [Figure 8]1A is a front view, FIG. 1B is a plan view, and FIG. 1C is a side view of a lower brace fixing member according to the present invention. [Figure 8A] 9A is an enlarged cross-sectional view taken along line VII-VII in FIG. 8, FIG. 9B is an enlarged cross-sectional view taken along line VIII-VIII, FIG. 9C is an enlarged cross-sectional view taken along line IX-IX, and FIG. 9D is an enlarged cross-sectional view taken along line XX in FIG. [Figure 9A] 4 is a cross-sectional view showing a state in which the brace lower fixing member and the brace support member in the present invention are fixed to each other. FIG. [Figure 9B] 4 is a cross-sectional view showing the brace fixing member before being fixed to the ceiling material support member. FIG. [Figure 9C] 4 is a cross-sectional view showing the brace lower fixing member being fixed to a ceiling material support member. FIG. [Figure 9D] 1 is a cross-sectional view showing a state in which a lower end portion of a brace is fixed by a brace receiving member and a brace cover member in the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0031] As shown in Fig. 1, the suspended ceiling having the brace mounting structure according to the present invention is configured such that the main frame 3 and the subframe 3A, which are ceiling material support members suspended by the suspension bolts 2 suspended from the building frame 1, are arranged in a lattice pattern intersecting in the XY direction, i.e., the X direction along the main frame 3 and the Y direction along the subframe 3A, and the upper and lower parts of the main frame 3 and the subframe 3A are connected via an upper joint member 4 and a lower joint member 5. The lower end of the brace material 7, one end of which is rotatably connected to an upper brace mounting bracket 6 attached to the suspension base side of the suspension bolt 2, is connected to the main frame 3 and the subframe 3A via a lower brace mounting bracket 10 constituting the brace lower mounting structure. In this case, the brace material 7 is formed of a rectangular tubular member. In addition, a ceiling plate (not shown) is arranged in the rectangular lattice space formed by the main frame 3 and the sub-frame 3A to cover the upper sides of the main frame 3 and the sub-frame 3A.

[0032] 1B, the main frame 3 comprises a hollow vertical base 3d having an upper hollow portion 3b and a lower hollow portion 3c, each of which has a substantially rectangular vertical cross section and is divided into upper and lower portions by a partition wall 3a, a pair of hollow flange portions 3e extending from both sides of the lower end of the vertical base 3d and on which a ceiling plate can be placed, an upper narrow opening groove portion 3f extending to the upper part of the vertical base 3d, and a lower narrow opening groove portion 3h provided between a lower piece 3g of the vertical base 3d and both hollow flange portions 3e. Note that a concave-convex strip 3i is provided along the longitudinal direction of the main frame 3 on the opposing opening side surfaces of the upper narrow opening groove portion 3f.

[0033] In this case, a first fitting groove 3j that opens upward is formed along the main frame 3 at a base end side portion of the upper surface of the hollow flange portion 3e. Also, a second fitting groove 3k that opens upward is formed along the main frame 3 at the vertical base portion 3d of the main frame 3 above the first fitting groove 3j.

[0034] The main frame 3 formed as described above is made of an aluminum extruded member.

[0035] The subframe 3A is formed of an aluminum extruded material having a shape similar to that of the mainframe 3, and therefore a description thereof will be omitted.

[0036] The main frame 3 and subframe 3A formed as described above are fixed to both sides of the upper portion of the main frame 3, and the upper portion of the main frame 3 and the upper portion of the subframe 3A are connected via an upper joint member 4 fixed to the upper and both sides of the subframe 3A. In addition, the lower portion of the main frame 3 and the subframe 3A are connected via a lower joint member 5 engaged in the first fitting groove 3j and the second fitting groove 3k.

[0037] The brace lower mounting structure includes a lower brace fixing member 20 fixed to the upper part of either the main frame 3 and the subframe 3A or the main frame 3 and the subframe 3A, a brace receiving member 11 fixed on the lower brace fixing member 20 and having a brace receiving plate portion 11a extending parallel to and vertically to the main frame 3 or the subframe 3A {hereinafter referred to as the main frame 3 (subframe 3A)}, and a brace lid member 12 connected to the brace receiving member 11 and having a brace lid plate portion 12a extending approximately parallel to the brace receiving plate portion 11a. The brace receiving member 11 and the brace lid member 12 constitute a lower brace mounting bracket 10.

[0038] The lower end of the brace material 7 is attached by fixing the brace receiving member 11 and the brace lid member 12 with the fixing screw 30 while being sandwiched between the brace receiving plate portion 11a and the brace lid plate portion 12a, and fixing the brace material 7 by screwing. In other words, one side surface of the lower end of the brace material 7 is fixed to the brace receiving plate portion 11a with the fixing screw 30, and while the lower end of the brace material 7 is sandwiched between the brace receiving plate portion 11a and the brace lid plate portion 12a, the brace lid member 12 is screwed to the brace receiving member 11 with the fixing screw 30, and the other side surface of the lower end of the brace material 7 is fixed to the brace lid plate portion 12a with the fixing screw 30, thereby attaching the lower end of the brace material 7.

[0039] As shown in Fig. 6 and Fig. 6A, the brace support member 11 has a brace support plate portion 11a extending parallel to the main frame 3 (subframe 3A) and vertically, a mounting bottom portion 11b bent perpendicularly from the lower end of the brace support plate portion 11a, and a rising portion 11c standing perpendicularly from the tip of the mounting bottom portion 11b, and is formed to have a substantially J-shaped cross section. In addition, a notch 11d is provided in the lower center portion of the brace support member 11, and a hanging bolt 2 can be connected to the intersection of the main frame 3 and the subframe 3A through the notch 11d. In addition, a rib 11e bent at a right angle inward is provided at the lower end of the brace support plate portion 11a where the notch 11d is provided (see Fig. 6A(a)). By providing the rib 11e in this manner, it is possible to prevent the lower end of the brace material 7 from shifting downward when the brace material 7 is attached. In addition, the upper end of the standing portion 11c comes into contact with the lower end of the brace material 7, thereby preventing the lower end of the brace material 7 from shifting downward.

[0040] In the brace support member 11 formed as described above, a plurality of small screw holes 13a are provided at predetermined intervals in the longitudinal and widthwise regions of the brace material 7 in the brace support plate portion 11a. In addition, a plurality of small screw holes 13b are provided at predetermined intervals in the longitudinal direction in the upright portion 11c. A pair of small holes 13c for fixing screws and a pair of fixing bolt holes 13d having a larger diameter than the small holes 13c are provided at both longitudinal ends of the mounting bottom portion 11b and on the side of the notch 11d (see Figs. 6A(c) and (d)).

[0041] As shown in FIG. 7 and FIG. 7A, the brace cover member 12 has a brace cover plate portion 12a extending substantially parallel to the brace receiving plate portion 11a, and a notch 12d is provided in the lower center portion of the brace cover plate portion 12a, and the notch 12d is formed so that the suspension bolt 2 can be connected to the intersection of the main frame 3 and the subframe 3A. In addition, a rib 12e that is bent at a right angle inward is provided at the lower end portion of the brace cover plate portion 12a where the notch 12d is provided (see FIG. 7A(a)). By providing the rib 12e in this manner, it is possible to prevent the lower end portion of the brace material 7 from shifting downward when the brace material 7 is attached. In addition, the upper end of the rising portion 11c comes into contact with the lower end portion of the brace material 7, thereby preventing the lower end portion of the brace material 7 from shifting downward.

[0042] In the brace cover plate 12a formed as described above, a plurality of small screw holes 13a are provided at predetermined intervals in the longitudinal and widthwise regions of the brace material 7 in the brace cover plate 12a. In addition, a plurality of small screw holes 13b are provided at predetermined intervals in the longitudinal direction in the lower end of the brace cover plate 12a.

[0043] As shown in Fig. 8 and Fig. 8A, the lower brace fixing member 20 is formed in a substantially U-shaped cross section with a pair of side pieces 20b in which both side edges of the upper piece 20a are bent at right angles. A pair of screw holes 21 and a pair of fixing bolt holes 22 with a larger diameter than the screw holes 21 are provided at both longitudinal ends of the upper piece 20a at positions closer to the end than the screw holes 21. In addition, through holes 23 for fixing screws are provided on both sides of the both longitudinal pieces 20b on the inner side of the positions of the screw holes 21. The positions of the through holes 23 provided in the both side pieces 20b are offset to avoid interference between the fixing screws 31 that penetrate the two through holes 23 and are screwed into the main frame 3 (subframe 3A).

[0044] The lower brace fixing member 20 formed as described above is fixed to the brace support member 11 by screwing a fixing screw 40 that passes through a small hole 13c provided in the mounting bottom 11b of the brace support member 11 into a screw hole 21 provided in the upper piece 20a.

[0045] The lower brace fixing member 20 is attached to the upper part of the main frame 3 (subframe 3A), and both sides are fixed by fixing screws 31, and the lower brace fixing member 20 is fixed to the main frame 3 (subframe 3A) by a fixing bolt 50, which is a second fixing member that fixes the lower brace fixing member 20 and the brace support member 11, in a state where the lower brace fixing member 20 is fitted to the upper part of the main frame 3 (subframe 3A). In other words, the lower brace fixing member 20 is fixed by screwing the fixing screw 31, which is formed by a grooved tapping screw that penetrates the through hole 23, into the main frame 3 (subframe 3A), and by screwing the fixing bolt 50, which penetrates the fixing bolt hole 13d provided in the mounting bottom 11b of the brace support member 11 and the fixing bolt hole 22 provided in the upper piece 20a of the lower brace fixing member 20, into a plate nut 51 arranged in the upper narrow opening groove 3f of the main frame 3 (subframe 3A) (see FIG. 2A).

[0046] The lower end of the brace material 7 is fixed by a fixing screw 30 that penetrates an arbitrary small hole 13a of a plurality of screw fastening small holes 13a provided in the brace receiving plate portion 11a of the brace receiving member 11 while the lower end of the brace material 7 is sandwiched between the brace receiving plate portion 11a and the brace cover plate portion 12a, and is fixed by a fixing screw 30 that penetrates an arbitrary small hole 13a of a plurality of screw fastening small holes 13a provided in the brace cover plate portion 12a of the brace cover member 12. At this time, the brace cover plate portion 12a is fixed by a fixing screw 30 that is screwed into the small hole 13b for screwing provided in the brace cover plate portion 12a and the small hole 13b for screwing provided in the upright portion 11c of the brace receiving member 11 while the brace cover plate portion 12a is in contact with the upright portion 11c. In this case, the fixing screw 30 is formed as a grooved tapping screw having a groove at the tip. By forming the fixing screw 30 as a grooved tapping screw, the installation work of the fixing screw 30 can be made easier.

[0047] Next, a procedure for attaching the brace material 7 will be described with reference to FIGS. 9A to 9D. First, with the mounting bottom 11b of the brace support member 11 abutted against the upper piece 20a of the lower brace fixing member 20, the fixing screw 40 passing through the small hole 13c provided in the mounting bottom 11b is screwed into the screw hole 21 provided in the upper piece 20a to fix the lower brace fixing member 20 and the brace support member 11 together (see Figure 9A).

[0048] Next, the lower brace fixing member 20 to which the brace support member 11 is fixed is fitted to the upper part of the main frame 3 (subframe 3A). When fitting the lower brace fixing member 20 to the upper part of the main frame 3 (subframe 3A), the brace support member 11 is positioned along the longitudinal direction of the main frame 3 (subframe 3A) so that the notch 11d provided in the center of the brace support member 11 is positioned to accommodate the hanging bolt 2 connected to the intersection of the main frame 3 and the subframe 3A. In this state, the fixing screw 31 formed by a grooved tapping screw passing through the through hole 23 provided in the side piece 20b is screwed into the main frame 3 (subframe 3A) to fix the lower brace fixing member 20. In this case, since the through holes 23 provided in the both side pieces 20b are offset, the fixing screws 31 screwed in from both sides do not interfere with each other. Furthermore, a fixing bolt 50 that passes through a fixing bolt hole 13d provided in the mounting bottom 11b of the brace support member 11 and a fixing bolt hole 22 provided in the upper piece 20a of the lower brace fixing member 20 is screwed, i.e., fastened, to a plate nut 51 arranged in the upper narrow opening groove portion 3f of the main frame 3 (subframe 3A) to fix it to the main frame 3 (subframe 3A) (see Figures 9B and 9C).

[0049] After the lower brace fixing member 20 is fixed to the main frame 3 (subframe 3A), one side of the lower end of the brace material 7 is abutted against the brace receiving plate portion 11a of the brace receiving member 11, and a fixing screw 30 that passes through any of the multiple screw fastening small holes 13a provided in the brace receiving plate portion 11a of the brace receiving member 11 is screwed into the brace material 7 to fix it. At this time, the brace cover plate portion 12a of the brace cover member 12 is abutted against the other side surface of the lower end portion of the brace material 7, and is abutted against the upright portion 11c of the brace receiving member 11 to clamp the brace material 7. In this state, the brace cover plate portion 12a of the brace cover member 12 is screwed in place by a fixing screw 30 passing through any of the multiple screw-fastening small holes 13a provided in the brace cover plate portion 12a of the brace cover member 12, and the fixing screw 30 is screwed into the screw-fastening small holes 13b provided in the brace cover plate portion 12a and the upright portion 11c to fix the lower end portion of the brace material 7 (see FIG. 9D and FIG. 3). As described above, when fixing the lower end portion of the brace material 7, any of the multiple small holes 13a can be selected to attach the lower end portion of the brace material 7 to an appropriate position, so that the lower end portion of the brace material 7 can be attached to an appropriate position while allowing for an error in the position of the brace material 7.

[0050] According to the embodiment of the brace lower attachment structure (method) for a suspended ceiling configured as described above, after the lower brace fixing member 20 and the brace support member 11 are fixed, the lower end of the brace material 7 can be screwed to the brace support member 11 while the lower brace fixing member 20 is fixed to the main frame 3 (subframe 3A), and then the brace cover plate portion 12 can be screwed to the brace support member 11 and the lower end of the brace material 7, so that the strength of the attachment portion of the brace can be improved and attachment can be made easier. In addition, since the brace support member 11 and the brace cover member 12 are separate, the length of the brace material 7 can be increased without friction during attachment. Therefore, an optimal axial force is transmitted to the brace material 7, and the strength can be improved. Furthermore, when attaching the brace material 7 to the brace support member 11, the brace material 7 can be attached while being visually observed, so that the brace material 7 can be attached while being attached, and the length of the brace material 7 can be adjusted and the position can be adjusted, making the attachment work easier.

[0051] In addition, the lower brace fixing member 20 and the main frame 3 (subframe 3A) can be firmly fixed, and the brace receiving member 11 can be firmly fixed, thereby further improving the strength of the brace mounting portion.

[0052] Furthermore, by aligning the centers of the brace support member 11 and the brace cover member 12 approximately with the intersection of the main frame 3 and the sub-frame 3A, which are connected to each other in a cross-shaped manner, the brace support member 11 and the brace cover member 12 can be attached in an even more stable state. In this case, by providing notches 11d, 12d in the lower central portion of the brace receiving member 11 and the brace cover member 12 and forming the suspension bolt 2 to be connectable to the intersection of the main frame 3 and the sub-frame 3A via the notches 11d, 12d, it becomes possible to attach the brace material 7 with the suspension bolt 2 already installed. Therefore, the brace material 7 can be easily attached to an existing suspended ceiling afterwards.

[0053] In addition, the lower end of the brace material 7 can be attached to an appropriate position by selecting any small hole 13a from the multiple small holes 13a provided in the brace support plate portion 11a and the brace cover plate portion 12a.Therefore, the lower end of the brace material 7 can be attached to an appropriate position while allowing for errors in the position of the brace material 7. [Explanation of symbols]

[0054] 2 Hanging bolt 3 Main frame (ceiling support member) 3A Subframe (ceiling support member) 7 Brace material 11 Brace support member 11a Brace support plate 11b Bottom mounting part 11c Standing part 11d Notch 12 Brace cover member 12a Brace cover plate 12d notch 13a, 13b Small holes for screw fastening 13c small hole 13d Fixing bolt hole 20 Lower brace fixing member 21 Screw hole 22 Fixing bolt hole 30 Fixing screw 31 Fixing screw 40 Fixing screw (first fixing member) 50 Fixing bolt (second fixing member) 51 Plate Nut

Claims

1. A brace lower mounting structure for a suspended ceiling in which a lower end of a brace material is connected to a ceiling material support member connected to a lower end of a suspension bolt, A lower brace fixing member fixed to an upper portion of the ceiling material support member; a brace support member fixed on the lower brace fixing member and having a brace support plate portion extending parallel to and vertically to the ceiling material support member; a brace cover member connected to the brace receiving member and having a brace cover plate portion extending substantially parallel to the brace receiving plate portion; The brace support member and the brace cover member are screwed together with the brace material fixed by screws while the lower end of the brace material is sandwiched between the brace support plate portion and the brace cover plate portion. A brace lower mounting structure for a suspended ceiling.

2. The brace lower mounting structure for a suspended ceiling according to claim 1, a lower brace fixing member that is fixed to the upper part of the ceiling material support member and has both sides fixed thereto, and the lower brace fixing member and the brace support member are fixed to the ceiling material support member by a first fixing member and a second fixing member.

3. The brace lower mounting structure for a suspended ceiling according to claim 1, A brace lower mounting structure for a suspended ceiling, characterized in that the centers of the brace support member and the brace cover member are configured to approximately coincide with the intersection points of the ceiling material support members that are connected to each other in a cross-shaped manner.

4. The brace lower mounting structure for a suspended ceiling according to claim 3, A lower brace mounting structure for a suspended ceiling, characterized in that a notch is provided in the lower central portion of the brace support member and the brace cover member, and a hanging bolt is formed so as to be connectable to the intersection of the ceiling material support member through the notch.

5. The brace lower mounting structure for a suspended ceiling according to claim 1, A brace lower mounting structure for a suspended ceiling, characterized in that a plurality of small holes for screw fastening are provided at predetermined intervals in the longitudinal and widthwise areas of the brace material in the brace support plate portion and the brace cover plate portion.

6. A method for attaching a brace lower part of a suspended ceiling, comprising connecting a lower end of a brace material to a ceiling material support member connected to a lower end of a suspension bolt, A lower brace fixing member fixed to an upper portion of the ceiling material support member; A brace support member having a brace support plate portion extending parallel to and vertically from the ceiling material support member; a brace cover member having a brace cover plate portion extending substantially parallel to the brace receiving plate portion; a step of fixing the lower brace fixing member and the brace receiving member; fixing the lower brace fixing member to the ceiling material support member; and a step of screwing the lower end of the brace material to the brace support member, and then screwing the brace cover plate to the brace support member and the lower end of the brace material. A method for installing the brace lower part of a suspended ceiling, comprising the steps of:

7. 7. The method for mounting a brace lower part of a suspended ceiling according to claim 6, A method for installing a lower brace on a suspended ceiling, characterized in that, in the process of fixing the lower brace fixing member to the ceiling material support member, the lower brace fixing member is placed across the ceiling material support member and fixed at both sides, and is fixed onto the ceiling material support member together with the brace support member.

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