Structure for attaching lower brace and method for attaching lower brace

Abstract

To provide structure for attaching a lower brace that allows freedom in arrangement of brace materials and sufficient strength with a simple configuration, and a method for attaching a lower brace.SOLUTION: The structure for attaching a lower brace for connecting a lower end of a brace material 7 to a ceiling plate 8 of a suspension ceiling comprises: a bottom plate member 20 fixed on the ceiling plate 8; a receiving member 11 having a brace receiving plate 11a joined to the bottom plate member 20 and vertically erected from the bottom plate member 20; and a lid member 12 having a brace lid plate 12a substantially parallel to the brace receiving plate 11a. While holding the lower end of the brace material 7 between the brace receiving plate 11a and the brace lid plate 12a, the brace material 7 is fixed by screws from both sides and the bottom plate 20 is fixed to the ceiling plate 8 by screws.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a brace lower mounting structure and a brace lower mounting method, and more specifically, to a brace lower mounting structure and a brace lower mounting method for connecting the lower end of a brace material to a ceiling panel of 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 panel 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 panel 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 board support member and has a reinforcing surface portion that is attached along the ceiling board 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 is hooked onto both ceiling board support members that are arranged in a lattice pattern across the ceiling board support members and also serves as a brace mounting portion.

[0004] The technology described in Patent Document 2 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 with the web portion of a ceiling board support member in between.

[0005] The technology described in Patent Document 3 discloses a structure in which the brace lower mounting bracket has a ceiling connection portion at the lower end of the connection portion that connects the lower ends of the brace material, and the ceiling connection portion is formed larger than the distance in one direction between adjacent ceiling panel support members and has multiple recessed fitting portions into which the ceiling panel support members can be fitted. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 4806239 [Patent Document 2] JP 2023-83636 A [Patent Document 3] Patent No. 6914023 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 board support members which are arranged in a grid pattern across the ceiling board support members, and one side of the brace material is attached to the reinforcing surface. This means that the positioning of the brace material is limited, there are concerns that it is not strong enough and that installation is troublesome.

[0008] The structure described in Patent Document 2 has a structure in which the lower end of the brace material is fixed with screws between a pair of holding plates arranged opposite each other with the web part of the ceiling board support member in between, and the distance between the pair of holding plates needs to be designed according to the width in the thickness direction of the brace material, so there is a concern that it will be time-consuming to set, i.e., insert and attach the brace material between the pair of holding plates designed according to the width dimension. There is also a concern that the placement of the brace material will be restricted.

[0009] In the structure described in Patent Document 3, a brace lower mounting bracket larger than the distance between the ceiling panel support members is used in order to improve the joint strength between the brace material and the brace lower mounting bracket, the joint strength between the mounting bracket and the ceiling panel, and the strength of the mounting bracket itself. Therefore, in the structure described in Patent Document 3, there are concerns that the brace lower mounting bracket becomes large and has a complicated structure, the arrangement of the brace material is restricted, and installation is troublesome.

[0010] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a brace lower mounting structure and a brace lower mounting method that allow freedom in the arrangement of brace material and that have sufficient strength while being of a simple structure. [Means for solving the problem]

[0011] In order to solve the above problems, the present invention is based on a brace lower part mounting structure and a brace lower part mounting method for connecting a lower end of a brace material to a ceiling panel of a suspended ceiling.

[0012] The brace lower mounting structure of the present invention comprises a bottom plate material fixed onto the ceiling plate, a support material having a brace support plate portion joined to the bottom plate material and erected vertically from the bottom plate material, and a cover material having a brace cover plate portion approximately parallel to the brace support plate portion, and with the lower end portion of the brace material sandwiched between the brace support plate portion and the brace cover plate portion, the brace material is fixed from both sides by screws, and the bottom plate material is fixed to the ceiling plate by screws. This is characterized by the above (Claim 1).

[0013] By configuring it in this manner, the lower end of the brace material can be fixed to the support material to which the bottom plate material, which is fixed to the ceiling plate, is joined, and then the brace material can be fixed from both sides by screwing while sandwiched between the support material and the cover material, and the bottom plate material can be fixed to the ceiling plate by screwing.

[0014] In the present invention, it is preferable that the overall length of the bottom plate material, the support material and the cover material in a direction parallel to the brace material is smaller than the distance between the ceiling plate support members supporting both side ends of the ceiling plate (claim 2).

[0015] With this configuration, it is not necessary to provide the bottom plate material, the support material, and the cover material with a notch or the like to avoid the ceiling board support member that may reduce strength, so the bottom plate material, the support material, and the cover material can be made smaller and the strength of the brace attachment part can be improved. Also, the brace attachment part can be arranged in a direction parallel to the ceiling board support member or in a direction perpendicular to the ceiling board support member.

[0016] In the present invention, it is preferable that the cover material and the brace material can be fixed to each other after the support material and the brace material are fixed to each other (claim 3).

[0017] By configuring it in this manner, the support material and the brace material can be fixed together while visually inspecting the brace material, and the position of the brace material can be confirmed.

[0018] In addition, in this invention, it is preferable that the support member includes the brace support plate portion, a mounting bottom portion bent perpendicularly from the lower end of the brace support plate portion and joined to the bottom plate material, and an upright portion standing perpendicularly from the tip of the mounting bottom portion, and the cover member is fixed to the upright portion by screwing (claim 4). In this case, it is preferable that the mounting bottom portion is joined to the bottom plate material by welding, or the mounting bottom portion is joined to the bottom plate material by screwing (claims 5 and 6).

[0019] With this configuration, a single plate can be bent to form a support member with three parts: a brace support plate portion, a mounting bottom portion, and an upright portion. The cover material fixed to the upright portion can also be a plate. In this case, the mounting bottom portion and the bottom plate can be joined by welding or fixed by screws to firmly join the entire underside of the support member to the bottom plate.

[0020] In addition, in this invention, it is preferable that the support material and the bottom plate material are joined by welding, and that the fixing screws fixing the bottom plate material and the ceiling plate are screwed in a direction parallel to the brace material, with at least two rows per side at appropriate intervals (Claim 7).

[0021] By configuring it in this manner, when the entire underside of the support material and the bottom plate material are joined by welding, the bottom plate material and the ceiling panel can be fixed with screws at appropriate intervals in at least two rows on both sides in the direction parallel to the brace material.

[0022] In addition, in this invention, it is preferable that the support material and the bottom plate material are joined by screws and are screwed to the ceiling plate, and that the fixing screws fixing the bottom plate material and the ceiling plate are screwed in a direction parallel to the brace material, in one row per side at appropriate intervals (Claim 8).

[0023] By configuring it in this manner, the joint between the support material and the bottom plate material can be screwed to the ceiling plate, and the screws can be screwed in a direction parallel to the brace material, one row per side at appropriate intervals.

[0024] In addition, in this invention, it is preferable that a mounting plate material fixed to the ceiling plate is further provided, the receiving material and the bottom plate material are joined by screws, and the mounting plate material is screwed to the ceiling plate via the mounting plate material, and the fixing screws for fixing the mounting plate material are screwed in a row per side at appropriate intervals in a direction parallel to the brace material, and the exposed parts of the fixing screws are concealed by the bottom plate material (Claim 9). In the case where the heads of the fixing screws protrude above the mounting plate material, it is preferable that a bottom plate lower member is further provided which is joined to the bottom plate material leaving both sides of the bottom plate material, and the bottom plate lower member is formed to a thickness at least equal to or greater than the height of the heads of the fixing screws protruding from the upper surface of the mounting plate material, and is interposed between the bottom plate material and the mounting plate material and screwed to the ceiling plate (Claim 10).

[0025] With this configuration, the joint between the support material and the bottom plate can be screwed to the ceiling plate via the mounting plate fixed to the ceiling plate, and the fixing screws for fixing the mounting plate can be screwed in a row on each side at appropriate intervals in a direction parallel to the brace material. Also, the exposed part of the fixing screw for fixing the mounting plate can be concealed by the bottom plate, and the strength of the entire brace lower mounting part is improved by the mounting plate interposed between the joint between the support material and the bottom plate and the ceiling plate. If the head of the fixing screw protrudes above the mounting plate, the head of the fixing screw protruding above the mounting plate can be concealed by the bottom plate by joining a bottom plate lower member having a thickness equal to or greater than the height of the head of the fixing screw to the underside of the bottom plate, leaving both sides of the bottom plate (claim 10).

[0026] In addition, in this invention, it is preferable that bending portions bent perpendicularly are provided at both longitudinal ends of the mounting plate material, and that the bending portions are engaged with the end surfaces of the receiving material, the cover material and the bottom plate material (Claim 11).

[0027] With this configuration, the bent parts of the mounting plate fixed to the ceiling plate engage with the end faces of the support, cover and bottom plate, integrating the bottom plate with the support and cover, and providing strength to the entire brace lower mounting part. The bent parts also serve to position the support in a direction parallel to the brace.

[0028] In the present invention, it is preferable that a reinforcing material is embedded in the upper surface side of the ceiling board, and the bottom board material is fixed to the reinforcing material by screws (claim 12).

[0029] With this configuration, the bottom plate material can be screwed to the reinforcing material embedded in the upper surface side of the ceiling plate, thereby connecting the bottom plate material to the ceiling plate.

[0030] 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 13).

[0031] 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.

[0032] In addition, in this invention, it is preferable that the bottom plate material is fixed across the joints of the adjacent ceiling plates in a direction perpendicular to the joints, or across the direction parallel to the joints (claims 14 and 16).In this case, it is preferable that the fixing screws fixing the bottom plate material and the ceiling plates are screwed in a direction perpendicular to the joints, or at least two rows on each side of the joints at appropriate intervals (claims 15 and 17).

[0033] With this configuration, the bottom plate material can be fixed to the adjacent ceiling plate in a direction perpendicular to the joints of the ceiling plate or across the joints in a direction parallel to the joints. In this case, the bottom plate material can be firmly fixed to the ceiling plate by fastening the fixing screws that fasten the bottom plate material to the ceiling plate in a direction perpendicular to the joints or by fastening at least two rows of screws at appropriate intervals on each side of the joints (claims 15 and 17).

[0034] In addition, in this invention, it is preferable that the orthogonal straddling mounting plate is further provided, which is fixed across the multiple joints of the ceiling plate in a direction perpendicular to the joints, and the support material and the bottom plate material in a direction perpendicular to the joints are joined by screws, and are screwed to the ceiling plate via the orthogonal straddling mounting plate, and the fixing screws for fixing the orthogonal straddling mounting plate are screwed in a direction parallel to the joints of the ceiling plate and on both sides facing the joints, in a direction parallel to the joints, at appropriate intervals (claim 18). In this case, it is preferable that the fixing screws for fixing the orthogonal straddling mounting plate are screwed in at least two rows at appropriate intervals on both sides facing the joints on both ends of the orthogonal straddling mounting plate (claim 19).

[0035] By configuring it in this manner, the bottom plate material can be fixed to a plurality of adjacent ceiling plates via the orthogonal spanning mounting plate, spanning a plurality of joints in the ceiling plates.

[0036] In addition, in this invention, it is preferable that the parallel straddling mounting plate is further provided, which is fixed across the joint of the ceiling plate in a direction parallel to the joint, and the support material and the bottom plate material located in the center of the parallel straddling mounting plate are joined by screws, and are screwed to the ceiling plate via the parallel straddling mounting plate, and the fixing screws for fixing the parallel straddling mounting plate are screwed at appropriate intervals in a direction parallel to the joint on both sides of the parallel straddling mounting plate that face each other with respect to the joint on both ends of the parallel straddling mounting plate (claim 20). In this case, it is preferable that the fixing screws for fixing the parallel straddling mounting plate are screwed at appropriate intervals in at least two rows on both sides of the parallel straddling mounting plate that face each other with respect to the joint on both ends of the parallel straddling mounting plate (claim 21).

[0037] By configuring in this manner, the bottom plate material can be fixed to an adjacent ceiling plate in a parallel direction spanning the joints of the ceiling plates via the parallel spanning mounting plate.

[0038] In addition, in this invention, it is preferable that the straddling mounting plate is further provided, which is parallel to the brace material and is fixed across the direction perpendicular to the multiple joints of the ceiling plate, and the support material and the bottom plate material perpendicular to the joints are joined by screws, and are screwed to the ceiling plate via the straddling mounting plate, and the fixing screws for fixing the straddling mounting plate are screwed at appropriate intervals on both sides facing the joints in a direction parallel to the joints (claim 22). In this case, the fixing screws for fixing the straddling mounting plate are screwed at appropriate intervals on both sides facing the joints on both ends of the straddling mounting plate, and at this time, it is preferable that at least two rows of the end side of the straddling mounting plate are screwed at appropriate intervals (claim 23).

[0039] By configuring it in this manner, the bottom plate material can be fixed to multiple adjacent ceiling panels across multiple joints via the spanning mounting plate, and the brace material can be attached in a direction perpendicular to the joints.

[0040] The brace lower installation method of the present invention is characterized in that it comprises the steps of preparing a bottom plate material to be fixed onto the ceiling plate, a support material having a brace receiving plate portion joined to the bottom plate material and standing vertically from the bottom plate material, and a cover material having a brace cover plate portion approximately parallel to the brace receiving plate portion, and fixing the bottom plate material to the ceiling plate, and screwing the lower end of the brace material to the brace receiving plate portion of the support material, and then screwing the brace cover plate portion to the brace receiving plate portion and to the lower end of the brace material (Claim 24).

[0041] By configuring it in this manner, the lower end of the brace material can be fixed to the support material to which the bottom plate material, which is fixed to the ceiling plate, is joined, and then the brace material can be fixed from both sides by screwing while sandwiched between the support material and the cover material, and the bottom plate material can be fixed to the ceiling plate by screwing.

[0042] In this invention, before fixing the bottom plate material to the ceiling panel, it is preferable to join the support material to the bottom plate material by welding, and to screw the fixing screws fixing the bottom plate material to the ceiling panel in a direction parallel to the brace material, with at least two rows per side appropriately spaced apart (Claim 25).

[0043] By configuring it in this manner, when the entire underside of the support material and the bottom plate material are joined by welding, the bottom plate material and the ceiling panel can be fixed with screws at appropriate intervals in at least two rows on both sides in the direction parallel to the brace material.

[0044] In addition, in this invention, after the bottom plate material is fixed to the ceiling panel, the support material is joined to the bottom plate material by screwing and is also screwed to the ceiling panel, and at this time, it is preferable that the fixing screws fixing the bottom plate material and the ceiling panel are screwed in a direction parallel to the brace material, in one row per side at appropriate intervals (Claim 26).

[0045] By configuring it in this manner, the joint between the support material and the bottom plate material can be screwed to the ceiling plate, and the screws can be screwed in a direction parallel to the brace material, one row per side at appropriate intervals.

[0046] In addition, in this invention, it is preferable that the process of fixing the bottom plate material to the ceiling panel includes a process of fixing the bottom plate material across a direction perpendicular to the joint portion of the adjacent ceiling panel, or a process of fixing the bottom plate material across a direction parallel to the joint portion (Claims 27 and 28).

[0047] By configuring it in this manner, the bottom plate material can be fixed to an adjacent ceiling plate in a direction perpendicular to the joints of the ceiling plates or in a direction parallel to the joints.

[0048] In addition, in this invention, it is preferable to further prepare an orthogonal spanning mounting plate that is fixed across a direction perpendicular to the multiple joint portions of the ceiling panel, and join the bottom panel material and the orthogonal spanning mounting plate by screwing and fixing them to the ceiling panel via the orthogonal spanning mounting plate, fix the orthogonal spanning mounting plate to both sides opposing the ceiling panel and the joint portions, and screw the lower end portion of the brace material to the brace receiving plate portion of the receiving material, and then screw the brace cover plate portion to the brace receiving plate portion and to the lower end portion of the brace material (Claim 29).

[0049] By configuring it in this manner, the bottom plate material can be fixed to a plurality of adjacent ceiling plates via the orthogonal spanning mounting plate, spanning a plurality of joints in the ceiling plates.

[0050] In addition, in this invention, it is preferable to further prepare a parallel spanning mounting plate that is fixed across a direction parallel to the joint portion of the adjacent ceiling panel, and join the bottom plate material located in the center of the parallel spanning mounting plate to the parallel spanning mounting plate by screwing and fixing it to the ceiling panel via the parallel spanning mounting plate, fix the parallel spanning mounting plate to both sides opposing the joint portion on both end sides of the parallel spanning mounting plate, and screw the lower end portion of the brace material to the brace supporting plate portion of the supporting material, and then screw the brace cover plate portion to the brace supporting plate portion and to the lower end portion of the brace material (Claim 30).

[0051] By configuring in this manner, the bottom plate material can be fixed to an adjacent ceiling plate in a parallel direction spanning the joints of the ceiling plates via the parallel spanning mounting plate.

[0052] In addition, in this invention, it is preferable to further prepare a spanning mounting plate that is fixed across the brace material in a direction parallel to the brace material and perpendicular to the multiple joint portions of the ceiling panel, and include the steps of joining the bottom panel material and the spanning mounting plate by screwing and fixing it to the ceiling panel via the spanning mounting plate, fixing the spanning mounting plate to both sides opposing the ceiling panel and the joint portions, and screwing the lower end portion of the brace material to the brace receiving plate portion of the receiving material, and then screwing the brace cover plate portion to the brace receiving plate portion and to the lower end portion of the brace material (Claim 31).

[0053] By configuring it in this manner, the bottom plate material can be fixed to multiple adjacent ceiling panels across multiple joints via the spanning mounting plate, and the brace material can be attached in a direction perpendicular to the joints. Effect of the Invention

[0054] According to the present invention, as configured above, the following remarkable effects can be obtained.

[0055] (1) According to the invention described in claims 1 and 24, the lower end of the brace material is screwed to the support material to which the bottom plate material is attached to the ceiling plate, and then the cover material is screwed to the support material, and the bottom plate material is fixed to the ceiling plate. This allows for freedom in the placement of the brace material, and sufficient strength can be obtained despite the simple structure. In addition, since the support material and the cover material are separate, friction does not occur when the brace material is installed, and the length of the gap between the support material and the cover material can be increased. Therefore, the optimal axial force is transmitted to the brace material, improving its strength.

[0056] (2) According to the invention described in claim 2, since there is no need to provide the bottom plate material, support material, and cover material with notches or the like to avoid the ceiling board support member that may reduce strength, in addition to the above (1), the bottom plate material, support material, and cover material can be made smaller, and the strength of the brace mounting part can be improved. Also, since the brace mounting part can be arranged parallel to the ceiling board support member or perpendicular to the ceiling board support member, the freedom of arrangement of the brace material can be improved and the construction efficiency of workers can be improved.

[0057] (3) According to the invention described in claim 3, when attaching the brace material to the receiving material, the brace material can be visually inspected while working. In addition to the above (1), the brace material's swallowing length and position can be adjusted, making the installation work easier.

[0058] (4) According to the invention described in claim 4, a support member having three parts, the brace support plate part, the mounting bottom part, and the standing part, can be made by bending a single plate material, which reduces the manufacturing cost of the support member. In addition, the cover material fixed to the standing part can be made of a plate material, which reduces the manufacturing cost of the cover material.

[0059] (5) According to the invention described in claims 5 and 6, the mounting bottom and the bottom plate material can be joined by welding or fixed by screws, so that the entire underside of the support material and the bottom plate material can be firmly joined, thereby improving the strength of the lower mounting portion of the brace.

[0060] (6) According to the invention described in claims 7 and 25, when the entire underside of the support material and the bottom plate material are joined by welding, the fixation can be strong even in a situation where the contact area between the bottom plate material and the ceiling plate is small.

[0061] (7) According to the invention described in claims 8 and 26, the joint between the support material and the bottom plate material can be screwed to the ceiling plate, and one row per side can be screwed at appropriate intervals in a direction parallel to the brace material. Therefore, even in situations where the contact area between the bottom plate material and the ceiling plate is small, the fixation can be strengthened by screwing in a few places.

[0062] (8) According to the invention described in claims 9 and 10, the joint between the support material and the bottom plate can be screwed to the ceiling plate via the mounting plate fixed to the ceiling plate, and the fixing screws for fixing the mounting plate can be screwed in a row on each side at appropriate intervals in a direction parallel to the brace material, so that the fixing can be strengthened by screwing in a few places even in a situation where the contact area between the bottom plate and the ceiling plate is small. Furthermore, the exposed part of the fixing screw for fixing the mounting plate can be hidden by the bottom plate, and the strength of the entire brace lower mounting part is improved by the mounting plate interposed between the joint between the support material and the bottom plate and the ceiling plate.

[0063] (9) According to the invention described in claim 11, in addition to the above (1) and (8), the bent portion of the mounting plate material fixed to the ceiling board engages with the end faces of the support material, the cover material, and the bottom plate material, thereby integrating the bottom plate material with the support material and the cover material, thereby providing strength to the entire lower mounting portion of the brace.

[0064] (10) According to the invention described in claim 12, the bottom plate material can be screwed to the reinforcing material embedded in the upper surface side of the ceiling plate to connect the bottom plate material to the ceiling plate, thereby making it possible to strengthen the connection between the bottom plate material and the ceiling plate.

[0065] (11) According to the invention described in claim 13, any small hole can be selected from among a plurality of small holes and the lower end of the brace material can be attached to an appropriate position, so that 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.

[0066] (12) According to the inventions described in claims 14 to 17, 27 and 28, the bottom plate material can be fixed to the adjacent ceiling plate in a direction perpendicular to the joints of the ceiling plate or in a direction parallel to the joints, so that the freedom of the arrangement of the brace material can be improved and the construction efficiency of the workers can be improved. In addition, since the bottom plate material is fixed across the joints of the ceiling plate, the strength of the connection of the ceiling plate can be improved.

[0067] (13) According to the inventions described in claims 18, 19, and 29, the bottom plate material can be fixed to multiple adjacent ceiling plates across multiple joints of the ceiling plates via the orthogonal straddling mounting plate, which allows for greater freedom in the placement of the brace material and improves the construction efficiency of workers. In addition, since the bottom plate material is fixed across the joints of multiple ceiling plates, the strength of the connection parts of the ceiling plates can be improved over a wide range.

[0068] (14) According to the invention described in claims 20, 21, and 30, the bottom plate material can be fixed to adjacent ceiling plates in a parallel direction across the joints of the ceiling plates via a parallel straddling mounting plate, which allows for greater freedom in arranging the brace material and improves the construction efficiency of workers. In addition, since the bottom plate material is fixed to adjacent ceiling plates in a parallel direction across the joints of the ceiling plates, the strength of the connection parts of the ceiling plates can be improved.

[0069] (15) According to the invention described in claims 22, 23, and 31, the bottom plate material can be fixed to multiple adjacent ceiling panels across multiple joints via the straddling mounting plate, and the brace material can be attached in a direction perpendicular to the joints. Therefore, the freedom of the brace material arrangement can be further expanded, and the construction efficiency of workers can be improved. In addition, since the bottom plate material can be fixed across the joints of multiple ceiling panels and the brace material can be attached in a direction perpendicular to the joints, the strength of the connection part of the ceiling panels can be improved. [Brief description of the drawings]

[0070] [Figure 1] FIG. 2 is a plan view showing a state in which a lower part of a brace is attached according to the first embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic front view showing, in cross section, a state in which a lower part of a brace is attached according to the first embodiment. [Diagram 3] FIG. 2 is a side view showing, in partial cross section, the installation state of the lower part of the brace according to the first embodiment. [Figure 4] 4 is a cross-sectional view showing a state in which a receiving material and a bottom plate material are fixed to a ceiling plate in the first embodiment. FIG. [Diagram 5] A cross-sectional view showing the state in which the brace material is fixed to the receiving material. [Figure 6] A cross-sectional view showing the state before the cover material is fixed to the support material and the brace material. [Figure 7] 11 is a cross-sectional view showing a state in which the lower end portion of the brace material is fixed. FIG. [Figure 8] 1A is a front view, FIG. 1B is a plan view, and FIG. 1C is a side view of the receiving material. [Figure 9] 8(a) is an enlarged cross-sectional view taken along line II in FIG. 8(a), and FIG. 8(b) is an enlarged cross-sectional view taken along line II-II in FIG. 8(b). [Figure 10] FIG. 2 is an exploded perspective view showing a bottom plate material, a receiving material, and a cover material of the first embodiment. [Figure 11] FIG. 11 is a plan view showing a state in which a lower part of a brace is attached according to a second embodiment of the present invention. [Figure 12] 13A is a front view showing a brace mounting state of the second embodiment, and FIG. 13B is an enlarged cross-sectional view of a portion IV in FIG. [Figure 13] FIG. 12 is an enlarged cross-sectional view taken along line III-III in FIG. [Figure 14] FIG. 11 is a plan view showing, in partial section, a state in which a lower part of a brace is attached according to a third embodiment of the present invention. [Figure 14A] FIG. 13 is a plan view showing, in partial cross section, a state in which a lower part of a brace is attached in a modified example of the third embodiment. [Figure 15] 7A is a front view showing a state in which a lower part of a brace is attached according to a third embodiment, and FIG. 7B is an enlarged cross-sectional view of part VII in FIG. [Figure 15A] 13A is a front view showing a state in which a lower part of a brace is attached in a modified example of the third embodiment, and FIG. 13B is an enlarged cross-sectional view of part IX in FIG. [Figure 16] 15A is a cross-sectional view taken along line VV in FIG. 14, and FIG. 15B is a cross-sectional view taken along line VI-VI in FIG. [Figure 16A] FIG. 14B is an enlarged cross-sectional view taken along line XX in FIG. 14A. [Figure 16B] FIG. 14B is an enlarged cross-sectional view taken along line XI-XI in FIG. 14A. [Figure 17]FIG. 13 is a plan view showing a state in which a lower part of a brace is attached according to a fourth embodiment of the present invention. [Figure 18] 8A is a front view showing a state in which a lower part of a brace is attached according to a fourth embodiment, and FIG. 8B is an enlarged cross-sectional view of a part VIII in FIG. [Figure 19] FIG. 11 is an enlarged cross-sectional view showing a state in which a lower part of a brace is attached in the fourth embodiment. [Figure 20] FIG. 13 is a plan view showing a state in which a lower part of a brace is attached according to a fifth embodiment of the present invention. [Figure 21] FIG. 13 is a front view showing, in partial cross section, the installation state of the lower part of the brace according to the fifth embodiment. [Figure 22] FIG. 13 is an enlarged cross-sectional view showing a main part of a fifth embodiment. [Figure 23] FIG. 13 is a plan view showing a state in which a lower part of a brace is attached in a sixth embodiment according to the present invention. [Figure 24] FIG. 13 is a schematic front view showing, in partial cross section, a state in which a lower part of a brace is attached according to a sixth embodiment. [Diagram 25] FIG. 13 is a side view showing, in partial cross section, the lower part of the brace in an attached state according to the sixth embodiment. [Figure 26] FIG. 13 is a plan view showing a state in which a lower part of a brace is attached according to a seventh embodiment of the present invention. [Figure 27] FIG. 13 is a side view showing, in partial cross section, the lower part of the brace in an attached state according to the seventh embodiment. [Figure 28] FIG. 23 is a plan view showing a state in which a lower part of a brace is attached according to an eighth embodiment of the present invention. [Figure 29] FIG. 23 is a plan view showing a main part of the eighth embodiment. [Diagram 30] 30 is an enlarged cross-sectional view taken along line XII-XII in FIG. 29. [Diagram 31] 30 is an enlarged cross-sectional view taken along line XIII-XIII in FIG. 29. [Diagram 32] FIG. 13 is a plan view showing a brace lower part attached state in a ninth embodiment according to the present invention. [Figure 33A] FIG. 34 is an enlarged cross-sectional view taken along line XIV-XIV in FIG. 32. [Figure 33B] 33 is an enlarged cross-sectional view taken along line XV-XV in FIG. 32. [Diagram 34] FIG. 23 is a plan view showing a brace lower mounting body according to a tenth embodiment of the present invention. [Diagram 35] FIG. 36 is an enlarged cross-sectional view taken along line XVI-XVI in FIG. 34. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0071] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0072] First Embodiment As shown in Figures 1 and 2, a suspended ceiling having a brace mounting structure according to the present invention has ceiling plate support members 3 suspended by hanging bolts 2 suspended from the building frame 1 and connected in parallel via joint members (not shown). The lower end of a brace material 7, one end of which is rotatably connected to an upper brace mounting bracket 6 attached to the frame 1, is connected to a ceiling plate 8 via a lower brace mounting bracket 10 constituting the lower brace mounting structure. The brace material 7 is formed of a rectangular tubular member.

[0073] In this case, the ceiling board 8 is formed of a heat insulating panel consisting of a pair of rectangular surface boards 8a, frame material 8b1 interposed between each side of the surface boards 8a, 8a, and heat insulating core material 8c filled in the space formed by the surface board 8a and the frame material 8b1. The ceiling board 8 is supported by the ceiling board support members 3 at both ends perpendicular to the longitudinal direction and is disposed so as to close the space between the ceiling board support members 3.

[0074] The brace lower mounting structure comprises a bottom plate 20 fixed to the ceiling plate 8, a support member 11 having a brace support plate portion 11a joined to the bottom plate 20 by welding and standing vertically from the bottom plate 20, and a plate-shaped cover member 12 having a brace cover plate portion 12a connected to the support member 11 and extending approximately parallel to the brace support plate portion 11a. The support member 11 and the cover member 12 form a lower brace mounting bracket 10.

[0075] 8, 9 and 10, the support member 11 is formed with a generally J-shaped cross section, having a brace support plate portion 11a that is welded to the longitudinal center of a rectangular bottom plate material 20 with chamfered corners and stands upright in the vertical direction, a mounting bottom portion 11b that is bent perpendicularly from the lower end of the brace support plate portion 11a, and an upright portion 11c that stands up perpendicularly from the tip of the mounting bottom portion 11b. Both upper corners of the brace support plate portion 11a are chamfered. The entire lower surface of the mounting bottom portion 11b of the receiving member 11 thus formed is joined to the bottom plate material 20 by welding.

[0076] In the support member 11 formed as described above, a plurality of small screw holes 13a are provided at a predetermined interval 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 a predetermined interval in the longitudinal direction in the upright portion 11c. In addition, a plurality of small screw holes 21 are provided at two rows per side at appropriate intervals in the direction parallel to the brace material 7, i.e., in the longitudinal direction, on both sides of the support member 11 in the bottom plate material 20. In addition, the number of small screw holes 21 is at least two rows, and may be more than two rows. In addition, the small holes 21 may be provided in a so-called staggered pattern in which the intervals between each row are different.

[0077] 2 and 10, the cover material 12 has a brace cover plate portion 12a extending substantially parallel to the brace receiving plate portion 11a, and a plurality of small screw holes 13a are provided at predetermined intervals in the brace cover plate portion 12a in the longitudinal and width directions of the brace material 7. In addition, a plurality of small screw holes 13b are provided at predetermined intervals in the longitudinal direction at the lower end of the brace cover plate portion 12a. Note that both upper corners of the brace cover plate portion 11a are chamfered in the same manner as the brace receiving plate portion 11a.

[0078] 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 screwing small holes 13a provided in the brace receiving plate portion 11a of the receiving material 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 screwing small holes 13a provided in the brace cover plate portion 12a of the cover material 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 receiving material 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.

[0079] Next, a procedure for attaching the brace material 7 will be described with reference to FIGS. First, the bottom plate material 20 joined to the receiving member 11 is placed, for example, in the center of the ceiling board 8, and the bottom plate material 20 is screwed (fixed) to the ceiling board 8 with fixing screws 40 that penetrate a plurality of small screw holes 21 provided at appropriate intervals in two rows on each side of the receiving member 11 in the bottom plate material 20 (see FIG. 4). Note that the fixing position of the bottom plate material 20 to the ceiling board 8 does not have to be the center of the ceiling board 8, and may be any position as long as the total length of the bottom plate material 20 and the receiving member 11 in the direction parallel to the brace material 7 is smaller than the distance between the main frames 3, 3 that support both end portions of the ceiling board 8.

[0080] After the bottom plate material 20 is fixed to the ceiling plate 8, one side of the lower end of the brace material 7 is abutted against the brace receiving plate portion 11a of the support material 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 support material 11 is screwed into the brace material 7 to fix it (see Figure 5).

[0081] Next, the brace cover plate portion 12a of the cover material 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 receiving material 11 to clamp the brace material 7. In this state, the brace cover plate portion 12a of the cover material 12 is screwed in place by a fixing screw 30 that penetrates an arbitrary small hole 13a of the multiple screwing small holes 13a provided in the brace cover plate portion 12a, and the fixing screw 30 is screwed into the screwing 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 Figs. 6 and 7). As described above, when fixing the lower end portion of the brace material 7, an arbitrary small hole 13a can be selected from the multiple small holes 13a, and 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.

[0082] In addition, Figures 1 and 2 show a configuration in which the bottom plate material 20, support material 11 and cover material 12, which constitute the brace mounting portion, are arranged in a direction perpendicular to the ceiling plate support member 3, i.e., in the longitudinal direction of the ceiling plate 8, but they may also be arranged in a direction parallel to the ceiling plate support member 3, i.e., in a direction perpendicular to the longitudinal direction of the ceiling plate 8.

[0083] According to the brace lower part mounting structure of the first embodiment configured as described above, the lower end of the brace material 7 is screwed to the support material 11 to which the bottom plate material 20 fixed to the ceiling plate 8 is joined, and then the cover material 12 is screwed to the support material 11, and the bottom plate material 20 can be fixed to the ceiling plate 8. This allows for freedom in the arrangement of the brace material 7, and sufficient strength can be obtained despite the simple structure. In addition, the bottom plate material 20, the support material 11, and the cover material 12 constituting the brace mounting part can be arranged in a direction parallel to the ceiling plate support member 3 supporting both side ends perpendicular to the longitudinal direction of the ceiling plate 8, or in a direction perpendicular to the ceiling plate support member 3. This allows for freedom in the arrangement of the brace material 7, and improves the construction efficiency of the worker. In addition, since the support material 11 and the cover material 12 are separate, the length of the brace material 7 that can be swallowed between the support material 11 and the cover material 12 can be increased without generating friction when the brace material 7 is attached. Therefore, an optimal axial force is transmitted to the brace material 7, and strength is improved.

[0084] 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.

[0085] <Second embodiment> The brace lower mounting structure of the second embodiment, as shown in Figures 11 to 13, is a case in which the bottom plate material 20 and the receiving material 11 are screwed together and also screwed to the ceiling plate 8, thereby reducing the number of fixing screws 40 used to fix the bottom plate material 20 to the ceiling plate 8.

[0086] In the second embodiment, as shown in Fig. 12(b), small holes 13c for fastening screws are provided at appropriate intervals in the longitudinal direction in the mounting bottom 11b of the receiving material 11. Fixing screws 50 passing through these small holes 13c are screwed into the bottom plate material 20 to screw (fix) the receiving material 11 and the bottom plate material 20 to the ceiling plate 8. The bottom plate material 20 is also provided with a plurality of small holes 21 for screwing at appropriate intervals in a row on both sides of the receiving material 11 in the bottom plate material 20. Fixing screws 40 passing through these small holes 21 are screwed into the ceiling plate 8 to screw (fix) the bottom plate material 22.

[0087] In the second embodiment, a procedure for fixing the receiving member 11 and the bottom plate material 20 to the ceiling plate 8 will be described. First, the bottom plate material 20 is screwed to the ceiling plate 8 by using fixing screws 40 that penetrate small holes 21 provided at appropriate intervals in a row on both sides of the bottom plate material 20.

[0088] After the bottom plate material 20 is fixed to the ceiling plate 8, it is joined with fixing screws 50 formed by grooved tapping screws that pass through multiple small holes 13c for joining screws provided at appropriate intervals on the mounting bottom 11b of the support material 11, and the joint between the support material 11 and the bottom plate material 20 is screwed (fixed) to the ceiling plate 8 by the fixing screws 50. In the second embodiment, other parts are the same as those in the first embodiment, so the same parts are given the same reference numerals and the description thereof is omitted.

[0089] After the bottom plate material 20 has been fixed to the ceiling plate 8 as described above, the lower end of the brace material 7 is clamped between the brace receiving plate portion 11a and the brace cover plate portion 12a, and the cover material 12 is screwed to the receiving material 11 with fixing screws 30, while the other side of the lower end of the brace material 7 is fixed to the brace cover plate portion 12a with fixing screws 30, thereby attaching the lower end of the brace material 7.

[0090] According to the second embodiment of the brace lower mounting structure configured as described above, when the underside of the receiving material 11 and the bottom plate material 20 are joined by screwing, the joint between the receiving material 11 and the bottom plate material 20 can be screwed to the ceiling plate 8, so that even in situations where the contact area between the bottom plate material 20 and the ceiling plate 8 is small, strong fixation can be achieved by screwing in a few places.

[0091] <Third embodiment> The brace lower mounting structure of the third embodiment further includes a mounting plate 22 fixed to the ceiling plate 8, and the support material 11 and the bottom plate 20 are joined by screws, and are screwed to the ceiling plate 8 via the mounting plate 22. In addition, the third embodiment is a case in which fixing screws 41 that fix the mounting plate 22 are screwed in a row at appropriate intervals per side in a direction parallel to the brace material 7, and the exposed parts of the fixing screws 41 are hidden by the bottom plate 20.

[0092] In the third embodiment, as shown in Fig. 15(b) and Fig. 16(b), the mounting plate 22 fixed to the ceiling plate 8 is provided with a plurality of small screw holes 23 at appropriate intervals in a row on both sides of the receiving member 11 in the bottom plate 20. The mounting plate 22 is screwed (fixed) by screwing a fixing screw 41 penetrating the small screw holes 23 into the ceiling plate 8. The fixing screw 41 is formed by a flat head screw, and the head does not protrude from the upper surface of the mounting plate 22. The mounting bottom 11b of the receiving member 11 is provided with small holes 13c for joining screws at appropriate intervals in the longitudinal direction. The joining portion of the receiving member 11 and the bottom plate 20 is screwed by a fixing screw 50 penetrating the small holes 13c, and is screwed to the ceiling plate 8 via the mounting plate 22.

[0093] In the third embodiment, a procedure for fixing the receiving member 11 and the bottom plate 20 to the ceiling plate 8 will be described. First, the mounting plate 22 is screwed (fixed) to the ceiling plate 8 by the fixing screws 41 that penetrate the small holes 23 provided at appropriate intervals in a row on both sides of the mounting plate 22.

[0094] After the mounting plate 22 is fixed to the ceiling plate 8, the bottom plate 20 joined to the receiving member 11 is placed on the mounting plate 22 and joined with fixing screws 50 formed by grooved tapping screws that pass through a plurality of small holes 13c for connecting screws provided at appropriate intervals in the mounting bottom 11b of the receiving member 11, and the joint between the receiving member 11 and the bottom plate 20 is screwed to the ceiling plate 8 via the mounting plate 22. As a result, the exposed parts of the fixing screws 41 that pass through the small holes 23 and are screwed to the ceiling plate 8 are hidden by the bottom plate 20. In the third embodiment, other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and the description thereof will be omitted.

[0095] After the bottom plate material 20 has been fixed to the ceiling plate 8 as described above, the lower end of the brace material 7 is clamped between the brace receiving plate portion 11a and the brace cover plate portion 12a, and the cover material 12 is screwed to the receiving material 11 with fixing screws 30, while the other side of the lower end of the brace material 7 is fixed to the brace cover plate portion 12a with fixing screws 30, thereby attaching the lower end of the brace material 7.

[0096] According to the brace lower mounting structure of the third embodiment configured as described above, the joint between the support member 11 and the bottom plate 20 can be screwed to the ceiling plate 8 via the mounting plate 22 fixed to the ceiling plate 8, and the fixing screws 41 for fixing the mounting plate 22 can be screwed in a row on each side at appropriate intervals in a direction parallel to the brace member 7, so that the fixing can be strengthened by screwing in a few places even in a situation where the contact area between the bottom plate 20 and the ceiling plate 8 is small. Furthermore, the exposed part of the fixing screws 41 for fixing the mounting plate 22 can be hidden by the bottom plate 20, and the strength of the entire brace lower mounting part is improved by the mounting plate 22 interposed between the joint between the support member 11 and the bottom plate 20 and the ceiling plate 8.

[0097] In the above explanation, the fixing screws 41 are described as being flat head screws whose heads do not protrude above the upper surface of the mounting plate 22. However, when using fixing screws 41a whose heads protrude above the mounting plate 22, for example, as pan head screws or truss screws, a bottom plate lower member 20a is joined to the underside of the bottom plate 20, and the heads 41b of the fixing screws 41a are concealed by the bottom plate 20, as shown in Figures 14A, 15A, 16A and 16B.

[0098] In this case, the bottom plate lower member 20a is formed to a thickness at least equal to or greater than the height of the head 41b of the fixing screw 41a, and is joined, for example, by welding, to the underside of the bottom plate material 20 except for both side portions. The bottom plate lower member 20a is interposed between the bottom plate material 20 and the mounting plate material 22, and is screwed to the ceiling plate 8.

[0099] As described above, when the head 41b of the fixing screw 41a protrudes above the mounting plate material 22, the head 41b of the fixing screw 41a protruding above the mounting plate material 22 can be concealed by the bottom plate material 20 by joining a bottom plate lower member 20a having a thickness greater than or equal to the height of the head 41b of the fixing screw 41a to the underside of the bottom plate material 20, leaving both side portions of the bottom plate material 20 remaining.

[0100] <Fourth embodiment> The brace lower mounting structure of the fourth embodiment is a case in which the bottom plate material 20, the receiving material 11 and the cover material 12 are integrated together by the mounting plate material 22 in the third embodiment, thereby providing strength to the entire brace lower mounting portion.

[0101] 17 to 19, in the fourth embodiment, a mounting plate 22 fixed to a ceiling plate 8 by fixing screws 41 has bent portions 24 that are bent perpendicularly at both longitudinal ends thereof. The bent portions 24 are engaged with the end faces of the bottom plate 20, the receiving member 11, and the cover member 12, thereby integrating the bottom plate 20, the receiving member 11, and the cover member 12, thereby providing strength to the entire brace lower mounting portion.

[0102] In the fourth embodiment, similarly to the third embodiment, the mounting plate 22 has a plurality of small screw holes 23 at appropriate intervals in a row on both sides of the receiving member 11 in the bottom plate 20, and the mounting plate 22 is screwed (fixed) to the ceiling plate 8 by fixing screws 41 that pass through the small screw holes 23. Also, the mounting bottom 11b of the receiving member 11 has small holes 13c for joining screws that are appropriately spaced in the longitudinal direction, and the joint between the receiving member 11 and the bottom plate 20 is screwed by fixing screws 50 that pass through the small holes 13c, and the mounting plate 22 is screwed (fixed) to the ceiling plate 8. In the fourth embodiment, other parts are the same as those in the first embodiment, so the same parts are given the same reference numerals and the description thereof is omitted.

[0103] In the fourth embodiment, the receiving member 11 and the bottom plate member 20 can be fixed to the ceiling plate 8 in the same manner as in the third embodiment, and therefore a description thereof will be omitted here. After the bottom plate 20 is fixed to the ceiling plate 8, the cover 12 is screwed to the support 11 with the fixing screw 30 while the lower end of the brace material 7 is sandwiched between the brace receiving plate 11a and the brace cover plate 12a in the same procedure as in the first embodiment described above, and the other side of the lower end of the brace material 7 is fixed to the brace cover plate 12a with the fixing screw 30 to attach the lower end of the brace material 7. In this state, the bent portion 24 provided on the mounting plate 22 is engaged with the end faces of the bottom plate 20, the support 11, and the cover 12.

[0104] According to the brace lower mounting structure of the fourth embodiment configured as described above, the bent portion 24 provided on the mounting plate 22 fixed to the ceiling board 8 engages with the end faces of the receiving material 11, the cover material 12, and the bottom plate 20, thereby integrating the bottom plate 20 with the receiving material 11 and the cover material 12, thereby providing strength to the entire brace lower mounting portion. In addition, the bent portion 24 has the function of positioning the receiving material 11 in a direction parallel to the brace material 7.

[0105] According to the brace lower mounting structure of the fourth embodiment, as in the third embodiment, the joint between the support member 11 and the bottom plate 20 can be screwed to the ceiling plate 8 via the mounting plate 22 fixed to the ceiling plate 8, and the fixing screws 41 for fixing the mounting plate 22 can be screwed in a row on each side at appropriate intervals in a direction parallel to the brace member 7, so that the fixing can be strengthened by screwing in a few places even in a situation where the contact area between the bottom plate 20 and the ceiling plate 8 is small. Furthermore, the exposed part of the fixing screws 41 for fixing the mounting plate 22 can be hidden by the bottom plate 20, and the strength of the entire brace lower mounting part is improved by the mounting plate 22 interposed between the joint between the support member 11 and the bottom plate 20 and the ceiling plate 8.

[0106] <Fifth embodiment> The brace lower mounting structure of the fifth embodiment is a case in which a bottom plate material 20 is screwed to a reinforcing material 60 embedded in the upper surface side of a ceiling plate 8 formed of a heat-insulating panel, thereby strengthening the connection between the bottom plate material 20 and the ceiling plate 8. In this case, the reinforcing material 60 is formed of a reinforcing plate.

[0107] In the fifth embodiment, as shown in Figures 20 to 22, a reinforcing material 60 is embedded below the front panel 8a on the upper side of the ceiling board 8, and this reinforcing material 60 provides strength to the lower brace mounting portion. The mounting bottom 11b of the receiving material 11 and the bottom plate material 20 are joined by welding. The bottom plate material 20 is provided with a plurality of small screw holes 21 at appropriate intervals in a row on both sides of the receiving material 11 in the bottom plate material 20. The fixing screws 40 that pass through these small holes 21 are screwed into the reinforcing material 60 embedded in the ceiling board 8 to fix the bottom plate material 20. In the fifth embodiment, other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and the description thereof will be omitted.

[0108] In the fifth embodiment, a procedure for fixing the receiving material 11 and the bottom plate material 20 to the ceiling board 8 will be described. First, in a state where the bottom plate material 20 joined to the receiving material 11 is placed on, for example, the center of the ceiling board 8, fixing screws 40 that pass through small holes 21 provided at appropriate intervals in a row on both sides of the bottom plate material 20 are screwed into reinforcing members 60 embedded in the ceiling board 8 to screw (fix) the bottom plate material 20 to the ceiling board 8.

[0109] After the bottom plate material 20 has been fixed to the ceiling plate 8 as described above, the lower end of the brace material 7 is clamped between the brace receiving plate portion 11a and the brace cover plate portion 12a, and the cover material 12 is screwed to the receiving material 11 with fixing screws 30, while the other side of the lower end of the brace material 7 is fixed to the brace cover plate portion 12a with fixing screws 30, thereby attaching the lower end of the brace material 7.

[0110] According to the brace lower mounting structure of the fifth embodiment configured as described above, the bottom plate material 20 can be connected to the ceiling plate 8 by screwing the bottom plate material 20 to the reinforcing material 60 embedded in the upper surface side of the ceiling plate 8, thereby making it possible to strengthen the connection between the bottom plate material and the ceiling plate. Also, the mounting bottom 11b of the receiving material 11 and the bottom plate material 20 are joined by welding, and the bottom plate material 20 is fixed to the ceiling plate 8 by fixing screws 40 that penetrate small screw holes 21 provided at appropriate intervals in a row on both sides of the receiving material 11 in the bottom plate material 20, making it possible to make the fixation strong by screwing in a small number of places.

[0111] Sixth Embodiment 23 to 25, the brace lower mounting structure of the sixth embodiment is a case in which a bottom plate material 20 joined to a receiving material 11 is fixed to both adjacent ceiling plates 8 across a direction perpendicular to the joints 9 of the adjacent ceiling plates 8. The joints 9 are formed by the engagement between the concave frame material 8b1 and the convex frame material 8b2 of the adjacent ceiling plates 8.

[0112] In the sixth embodiment, the upper end of the brace material 7 is rotatably connected to the upper brace mounting bracket 6 attached to the skeleton 1 side, as in the first embodiment. In this case, the upper brace mounting bracket 6 is firmly attached to the skeleton 1 by the fixing bolt 4 via the washer 5 made of a thick square plate, as shown in FIG. 24. By providing the washer 5 made of a thick square plate, the rigidity of the mounting portion of the upper brace mounting bracket 6 is improved, so that the amount of deflection of the upper brace mounting bracket 6 can be reduced even if a load is applied from the brace material 7 during an earthquake. In other words, the plastic deformation of the upper brace mounting bracket 6 can be suppressed, and the support strength of the brace material 7 can be improved. In this case, the shape of the washer 5 is a square plate, but it may be a round plate, a polygonal plate, or other shape as long as it can provide rigidity. The hanging bolt 2 is attached to the connection side of the upper brace mounting bracket 6.

[0113] In the sixth embodiment, as shown in Figures 23 and 24, the bottom plate material 20 is positioned across a direction perpendicular to the joint portion 9 of an adjacent ceiling plate 8, and is fixed to the ceiling plate 8 by a plurality of fixing screws 40 at appropriate intervals in two rows on each side opposing each other in the direction perpendicular to the joint portion 9. In the sixth embodiment, other parts are the same as those in the first embodiment, so the same parts are given the same reference numerals and the description thereof will be omitted.

[0114] In the sixth embodiment, a procedure for fixing the support material 11 and the bottom plate material 20 to the ceiling board 8 will be described. First, in a state where the bottom plate material 20 joined to the support material 11 is arranged straddling the joint portion 9 of the adjacent ceiling board 8 in a direction perpendicular to the joint portion 9, fixing screws 40 that penetrate small holes 21 provided at appropriate intervals in two rows on each side facing each other in the direction perpendicular to the joint portion 9 are screwed (fixed) to both adjacent ceiling boards 8.

[0115] After the bottom plate material 20 has been fixed to the ceiling plate 8 across the joint portion 9 of the adjacent ceiling plate 8 as described above, the lower end portion of the brace material 7 is clamped between the brace receiving plate portion 11a and the brace cover plate portion 12a, and the cover material 12 is screwed to the receiving material 11 with fixing screw 30, while the other side of the lower end portion of the brace material 7 is fixed to the brace cover plate portion 12a with fixing screw 30, thereby attaching the lower end portion of the brace material 7.

[0116] According to the brace lower mounting structure of the sixth embodiment configured as described above, the bottom plate material 20 can be fixed to the adjacent ceiling plate 8 across the joints 9 of the ceiling plate 8 in a direction perpendicular to the joints 9, allowing greater freedom in arranging the brace material 7 and improving the construction efficiency of workers. In addition, since the bottom plate material 20 is fixed across the joints 9 of the ceiling plate 8, the strength of the connecting parts of the ceiling plates 8 is improved.

[0117] Seventh embodiment The seventh embodiment of the brace lower mounting structure is, as shown in Figures 26 and 27, a bottom plate material 20 joined to a receiving material 11 is fixed to both adjacent ceiling panels 8 across a direction parallel to the joint portions 9 of the adjacent ceiling panels 8.

[0118] In the seventh embodiment, as shown in Figures 26 and 27, the bottom plate material 20 is positioned across a direction parallel to the joint portion 9 of an adjacent ceiling plate 8, and is fixed to the ceiling plate 8 by a plurality of fixing screws 40 at appropriate intervals in two rows on each side opposing the joint portion 9. In the seventh embodiment, other parts are the same as those in the first embodiment, so the same parts are given the same reference numerals and the description thereof is omitted.

[0119] In the seventh embodiment, a procedure for fixing the receiving material 11 and the bottom plate material 20 to the ceiling board 8 will be described. First, in a state where the bottom plate material 20 joined to the receiving material 11 is arranged straddling in a direction parallel to the joint portion 9 of the adjacent ceiling board 8, fixing screws 40 that penetrate small holes 21 provided at appropriate intervals in two rows on each side of the opposing joint portion 9 are screwed (fixed) to both adjacent ceiling boards 8.

[0120] After the bottom plate material 20 has been fixed to the ceiling plate 8 across the joint portion 9 of the adjacent ceiling plate 8 as described above, the lower end portion of the brace material 7 is clamped between the brace receiving plate portion 11a and the brace cover plate portion 12a, and the cover material 12 is screwed to the receiving material 11 with fixing screw 30, while the other side of the lower end portion of the brace material 7 is fixed to the brace cover plate portion 12a with fixing screw 30, thereby attaching the lower end portion of the brace material 7.

[0121] According to the brace lower mounting structure of the seventh embodiment configured as described above, the bottom plate material 20 can be fixed to the adjacent ceiling plate 8 across the direction parallel to the joints 9 of the ceiling plates 8, allowing greater freedom in arranging the brace material 7 and improving the construction efficiency of workers. In addition, since the bottom plate material 20 is fixed across the joints 9 of the ceiling plates 8, the strength of the connecting parts of the ceiling plates 8 is improved.

[0122] Eighth embodiment The brace lower mounting structure of the eighth embodiment further includes an orthogonal spanning mounting plate 70 that is fixed across a direction perpendicular to multiple joints 9 of the ceiling panel 8, and the support material 11 and the bottom panel material 20 perpendicular to the joints 9 are joined by screwing, and are screwed to the ceiling panel 8 via the orthogonal spanning mounting plate 70, and the fixing screws 40 that secure the orthogonal spanning mounting plate 70 are screwed in a direction parallel to the joints 9 in the ceiling panel 8 and on both opposing sides of the joints 9, with appropriate spacing between them in a direction parallel to the joints 9.

[0123] In the eighth embodiment, as shown in Fig. 28 to Fig. 31, the orthogonal straddling mounting plate 70 has two rows of small screw fastening holes 71 at appropriate intervals at a portion where it abuts against the bottom plate material 20, the small screw fastening holes 71 corresponding to the small screw fastening holes 21 provided in the bottom plate material 20. Also, two rows of small screw fastening holes 71 are provided at appropriate intervals at portions on both sides of the orthogonal straddling mounting plate 70 that face each other with respect to the joint portion 9. Furthermore, a row of small screw fastening holes 71 is provided at appropriate intervals in a direction parallel to the joint portion 9 at an intermediate portion of the orthogonal straddling mounting plate 70 between the bottom plate material 20 and the end portion on the side of the joint portion 9. In the eighth embodiment, other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and the description thereof will be omitted.

[0124] In the eighth embodiment, a procedure for fixing the receiving material 11 and the bottom plate material 20 to the ceiling board 8 will be described. First, the orthogonal straddling mounting plate 70 is placed on the ceiling board 8 across the joints 9 on both sides, and then fixed to the ceiling board 8 with fixing screws 40 that penetrate two rows of small screw holes 71 provided on both sides facing each other with respect to the joints 9, and also fixed to the ceiling board 8 with fixing screws 40 that penetrate the small screw holes 71 provided in the middle between the bottom plate material 20 and the end of the joints 9.

[0125] After the orthogonal straddling mounting plate 70 is fixed to the ceiling plate 8 while spanning the joints 9 on both sides, the bottom plate material 20 joined to the support material 11 is placed on the orthogonal straddling mounting plate 70. In this state, the support material 11 is joined with fixing screws 50 formed by grooved tapping screws that pass through a plurality of small holes 13c for joining screws provided at appropriate intervals in the mounting bottom 11b of the support material 11, and the joint between the support material 11 and the bottom plate material 20 is screwed to the ceiling plate 8 via the orthogonal straddling mounting plate 70. In addition, fixing screws 40 that pass through two rows of small screw holes 21 provided on both sides of the bottom plate material 20 and small screw holes 71 provided in the orthogonal straddling mounting plate 70 are screwed to the ceiling plate 8.

[0126] As described above, the bottom plate material 20 is fixed to the ceiling plate 8 across the joint portions 9 of multiple ceiling plates 8 via the orthogonal straddling mounting plate 70, and then, following a procedure similar to that of the first embodiment described above, the lower end portion of the brace material 7 is clamped between the brace receiving plate portion 11a and the brace cover plate portion 12a, and the cover material 12 is screwed to the receiving material 11 with fixing screws 30, and the other side of the lower end portion of the brace material 7 is fixed to the brace cover plate portion 12a with fixing screws 30 to attach the lower end portion of the brace material 7.

[0127] According to the brace lower mounting structure of the eighth embodiment configured as described above, the bottom plate material 20 can be fixed to a plurality of adjacent ceiling plates 8 across a plurality of joints 9 of the ceiling plates 8 via the orthogonal straddling mounting plate 70, which allows for greater freedom in arranging the brace material 7 and improves the construction efficiency of workers. In addition, because the bottom plate material 20 is fixed across the joints 9 of a plurality of ceiling plates 8, the strength of the connections of the ceiling plates 8 can be improved over a wide range.

[0128] <Ninth embodiment> The brace lower mounting structure of the ninth embodiment further includes a parallel spanning mounting plate 80 that is fixed across and in a direction parallel to the joint portion 9 of the ceiling panel 8, and the support material 11 and the bottom panel material 20 located in the center of the parallel spanning mounting plate 80 are joined by screwing, and are screwed to the ceiling panel 8 via the parallel spanning mounting plate 80, and the fixing screws 40 that secure the parallel spanning mounting plate 80 are screwed in at an appropriate interval on both sides facing the joint portion 9 on both ends of the parallel spanning mounting plate 80 in a direction parallel to the joint portion 9.

[0129] In the ninth embodiment, as shown in Figures 32, 33A and 33B, the parallel spanning mounting plate 80 is formed in an approximately elongated rectangular shape having the same width as the bottom plate material 20, and the bottom plate material 20 is disposed in the center of the parallel spanning mounting plate 80.

[0130] The parallel straddling mounting plate 80 has two rows of small screw fastening holes 81 at appropriate intervals in a portion where it abuts against the bottom plate material 20, the small screw fastening holes 81 corresponding to the small screw fastening holes 21 provided in the bottom plate material 20. In addition, a plurality of small screw fastening holes 81 are provided in two rows at appropriate intervals in portions on both sides facing each other with respect to the joint portion 9 on both ends in the longitudinal direction of the parallel straddling mounting plate 80.

[0131] In this case, in order to firmly fix the parallel straddling mounting plate 80, six small screw holes 81 are provided on each end of the parallel straddling mounting plate 80, and two small screw holes 81 are provided on each side on the bottom plate material 20 side of the parallel straddling mounting plate 80. Note that the number of small screw holes 81 is not limited to this, and any number of small screw holes 81 on both ends may be set according to the longitudinal length of the parallel straddling mounting plate 80. In the ninth embodiment, other parts are the same as those in the first embodiment, so the same parts are given the same reference numerals and the description thereof will be omitted.

[0132] In the ninth embodiment, a procedure for fixing the receiving material 11 and the bottom plate material 20 to the ceiling board 8 will be described. First, the parallel straddling mounting plate 80 is placed on the ceiling board 8 across the joints 9 of the adjacent ceiling boards 8, and then fixed to the ceiling board 8 with fixing screws 40 that penetrate two rows of small screw holes 81 provided on both sides of the parallel straddling mounting plate 80 that face each other with respect to the joints 9 at both ends in the longitudinal direction.

[0133] After the parallel straddling mounting plate 80 is fixed to the ceiling plate 8 while spanning the joints 9 of the adjacent ceiling plates 8, the bottom plate material 20 joined to the support material 11 is placed on the parallel straddling mounting plate 80. In this state, fixing screws 40 that pass through two rows of small screw holes 21 on both sides of the bottom plate material 20 and small screw holes 81 in the parallel straddling mounting plate 80 are screwed into the ceiling plate 8.

[0134] As described above, the bottom plate material 20 is fixed to the ceiling plate 8 across the joint portions 9 of multiple ceiling plates 8 via the parallel spanning mounting plate 80, and then, following a procedure similar to that of the first embodiment described above, the lower end portion of the brace material 7 is clamped between the brace receiving plate portion 11a and the brace cover plate portion 12a, and the cover material 12 is screwed to the receiving material 11 with fixing screws 30, while the other side of the lower end portion of the brace material 7 is fixed to the brace cover plate portion 12a with fixing screws 30 to attach the lower end portion of the brace material 7.

[0135] According to the brace lower mounting structure of the ninth embodiment configured as described above, the bottom plate material 20 can be fixed to adjacent ceiling plates 8 in a parallel direction spanning the joints 9 of the ceiling plates 8 via the parallel spanning mounting plate 80. This allows for greater freedom in arranging the brace materials 7, and improves the construction efficiency of workers. In addition, since the bottom plate material 20 is fixed to adjacent ceiling plates 8 in a parallel direction spanning the joints 9 of the ceiling plates 8, the strength of the connecting parts of the ceiling plates 8 is improved.

[0136] Tenth embodiment The brace lower mounting structure of the tenth embodiment further includes a spanning mounting plate 90 that is fixed across a direction parallel to the brace material 7 and perpendicular to the multiple joints 9 of the ceiling panel 8, and the support material 11 and the bottom panel material 20 perpendicular to the joints 9 are joined by screwing, and are screwed to the ceiling panel 8 via the spanning mounting plate 90. Fixing screws 42 that secure the spanning mounting plate 90 are screwed in a direction parallel to the joints 9 in the ceiling panel 8 and on both opposing sides of the joints 9, with appropriate spacing between them.

[0137] In the tenth embodiment, as shown in Figures 34 and 35, the straddling mounting plate 90 is formed in an approximately elongated rectangular shape having the same width as the bottom plate material 20, and the bottom plate material 20 is disposed in the center of the straddling mounting plate 90.

[0138] The straddling mounting plate 90 has two rows of small screw fastening holes 91 at appropriate intervals in a portion where it abuts against the bottom plate material 20, the small screw fastening holes 91 corresponding to the small screw fastening holes 21 provided in the bottom plate material 20. In addition, a plurality of small screw fastening holes 91 are provided at appropriate intervals in portions on both sides facing each other with respect to the joint portion 9 on both ends in the longitudinal direction of the straddling mounting plate 90.

[0139] In this case, in order to firmly fix the straddling mounting plate 90, two rows of small screw fastening holes 91 are provided at appropriate intervals on both ends of the straddling mounting plate 90 that straddles the joint portion 9. Also, a row of small screw fastening holes 91 is provided at appropriate intervals on the inner side facing the end portion with respect to the joint portion 9. Note that a plurality of small screw fastening holes 91 are provided at appropriate intervals in a row in a direction parallel to the joint portion 9 in an intermediate portion of the straddling mounting plate 90 between the bottom plate material 20 and the end portion on the joint portion 9 side. In the tenth embodiment, other parts are the same as those in the first embodiment, so the same parts are given the same reference numerals and the description thereof is omitted.

[0140] In the tenth embodiment, a procedure for fixing the receiving material 11 and the bottom plate material 20 to the ceiling board 8 will be described. First, the straddling mounting plate 90 is placed on the ceiling board 8 across the joints 9 on both sides, and then fixed to the ceiling board 8 with the fixing screws 42 that pass through the small screw holes 91 provided in the opposite positions of the joints 9, and also fixed to the ceiling board 8 with the fixing screws 42 that pass through the small screw holes 91 provided in the middle between the bottom plate material 20 and the end of the joints 9.

[0141] After the straddling mounting plate 90 is fixed to the ceiling plate 8 while spanning the joints 9 on both sides, the bottom plate material 20 joined to the receiving material 11 is placed on the straddling mounting plate 90. In this state, fixing screws 40 that pass through two rows of small screw holes 21 on both sides of the bottom plate material 20 and small screw holes 91 on the straddling mounting plate 90 are screwed into the ceiling plate 8.

[0142] As described above, the bottom plate material 20 is fixed to the ceiling plate 8 via the straddling mounting plate 90, spanning the joints 9 of multiple ceiling plates 8, and then, following the same procedure as in the first embodiment described above, with the lower end of the brace material 7 sandwiched between the brace receiving plate portion 11a and the brace cover plate portion 12a, the cover material 12 is screwed to the receiving material 11 with fixing screws 30, and the other side of the lower end of the brace material 7 is fixed to the brace cover plate portion 12a with fixing screws 30 to attach the lower end of the brace material 7. In this state, the brace material 7 is attached in a direction perpendicular to the joints 9.

[0143] According to the brace lower attachment structure of the tenth embodiment configured as described above, the bottom plate material 20 can be fixed to a plurality of adjacent ceiling panels 8 across a plurality of joints 9 via the straddling attachment plate 90, and the brace material 7 can be attached in a direction perpendicular to the joints 9. This allows for greater freedom in arranging the brace material 7, and improves the construction efficiency of workers. In addition, since the bottom plate material 20 can be fixed across the joints 9 of a plurality of ceiling panels 8, and the brace material 7 can be attached in a direction perpendicular to the joints 9, the strength of the connection parts of the ceiling panels 8 can be improved.

[0144] In the above embodiment, the ceiling panel 8 is described as being formed from an insulating panel consisting of a pair of surface panels 8a, a frame material 8b1 interposed between each side of both surface panels 8a, 8a, and an insulating core material 8c filled into the space formed by the surface panels 8a and the frame material 8b1. However, the ceiling panel 8 is not limited to this, and the present invention can also be applied to ceiling panels of other structures.

[0145] In the above embodiment, the reinforcing material 60 is formed of a reinforcing plate, but the reinforcing material does not necessarily have to be a reinforcing plate. The reinforcing material may be any material that is embedded in the portion where the bottom plate material 20 is screwed, and may be, for example, a channel material or an angle material.

[0146] According to the embodiment of the brace lower attachment structure configured as described above, the brace material 7 can be freely positioned, and sufficient strength can be obtained despite the simple structure. In addition, since the brace attachment portion can be positioned parallel to the ceiling board support member 3 or perpendicular to the ceiling board support member 3, the brace material 7 can be freely positioned, and the construction efficiency of workers can be improved. In addition, since the support member 11 and the cover member 12 are separate, the brace material 7 can be attached without friction and the length of the brace material 7 that can be inserted between the support member 11 and the cover member 12 can be increased. Therefore, an optimal axial force is transmitted to the brace material 7, and strength is improved.

[0147] In addition, since there is no need to provide notches or the like in the bottom plate material 20, support material 11 and cover material 12 to avoid the ceiling board support members that could reduce strength, the bottom plate material 20, support material 11 and cover material 12 can be further reduced in size, thereby improving the strength of the brace mounting portion.

[0148] In addition, when attaching the brace material 7 to the receiving material 11, the brace material 7 can be attached while being visually checked, so that the swallowing length and position of the brace material 7 can be adjusted, making the attachment work easier. [Explanation of symbols]

[0149] 7 Brace material 8 Ceiling Panel 9 Joint 11 Support material 11a Brace support plate 11b Bottom mounting part 11c Standing part 12 Lid material 12a Brace cover plate 13a, 13b Small holes for screw fastening 13c small hole 20 Bottom plate material 20a Bottom plate lower part 21 Small screw hole 22 Mounting plate 23 Small screw hole 24 Bend section 30, 40, 41, 41a, 50 Fixing screws 41b Fixing screw head 42 Small screw hole 60 Reinforcement 70 Orthogonal straddling mounting plate 80 Parallel straddle mounting plate 90 Straddle mounting plate

Claims

1. A brace lower mounting structure for connecting a lower end of a brace material to a ceiling plate of a suspended ceiling, A bottom plate material fixed onto the ceiling plate; A support member having a brace support plate portion joined to the bottom plate material and erected vertically from the bottom plate material; and a cover material having a brace cover plate portion substantially parallel to the brace receiving plate portion, The brace material is fixed by screws from both sides in a state where the lower end portion of the brace material is sandwiched between the brace receiving plate portion and the brace cover plate portion, The bottom plate is fixed to the ceiling plate by screws. A brace lower mounting structure.

2. The brace lower mounting structure according to claim 1, A brace lower mounting structure, characterized in that the overall length of the bottom plate material, the support material and the cover material in a direction parallel to the brace material is smaller than the spacing between the ceiling plate support members supporting both side ends of the ceiling plate.

3. The brace lower mounting structure according to claim 1, A brace lower mounting structure, characterized in that the cover material and the brace material can be fixed together after the support material and the brace material are fixed together.

4. The brace lower mounting structure according to claim 1, a brace lower mounting structure, characterized in that the support material comprises the brace support plate portion, a mounting bottom portion bent perpendicularly from the lower end of the brace support plate portion and joined to the bottom plate material, and an upright portion that stands perpendicularly from the tip of the mounting bottom portion, and the cover material is fixed to the upright portion by screwing.

5. The brace lower mounting structure according to claim 4, A brace lower mounting structure, characterized in that the mounting bottom is joined to the bottom plate material by welding.

6. The brace lower mounting structure according to claim 4, A brace lower mounting structure, characterized in that the mounting bottom is joined to the bottom plate material by screwing.

7. The brace lower mounting structure according to claim 1 or 4, A brace lower mounting structure characterized in that the support material and the bottom plate material are joined by welding, and fixing screws for fixing the bottom plate material and the ceiling plate are screwed in at least two rows per side at appropriate intervals in a direction parallel to the brace material.

8. The brace lower mounting structure according to claim 1 or 4, A brace lower mounting structure characterized in that the support material and the bottom plate material are joined by screws and are screwed to the ceiling plate, and fixing screws fixing the bottom plate material and the ceiling plate are screwed in a row per side at appropriate intervals in a direction parallel to the brace material.

9. The brace lower mounting structure according to claim 1, A brace lower mounting structure further comprising a mounting plate that is fixed to the ceiling plate, the support material and the bottom plate being joined by screws and screwed to the ceiling plate via the mounting plate, and fixing screws that fix the mounting plate are screwed in a row per side at appropriate intervals in a direction parallel to the brace material, and the exposed portions of the fixing screws are concealed by the bottom plate.

10. The brace lower mounting structure according to claim 9, a bottom plate lower member which is joined to the bottom plate leaving both sides of the bottom plate unattached, the bottom plate lower member being formed to a thickness at least equal to the height of the head of the fixing screw protruding from the upper surface of the mounting plate, and being interposed between the bottom plate and the mounting plate and screwed to the ceiling plate.

11. The brace lower mounting structure according to claim 9, A brace lower mounting structure characterized in that a bent portion is provided at both longitudinal ends of the mounting plate material so as to be bent perpendicularly, and the bent portion is engaged with the end faces of the support material, the cover material and the bottom plate material.

12. The brace lower mounting structure according to claim 1, A brace lower mounting structure, comprising: a reinforcing material embedded in an upper surface side of the ceiling board; and the bottom board material being fixed to the reinforcing material with screws.

13. The brace lower mounting structure according to claim 1 or 4, A brace lower mounting structure 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.

14. The brace lower mounting structure according to claim 1, A brace lower mounting structure characterized in that the bottom plate material is fixed across and perpendicular to the joints of the adjacent ceiling plates.

15. The brace lower mounting structure according to claim 14, A brace lower mounting structure characterized in that the fixing screws for fixing the bottom plate material and the ceiling plate are screwed at appropriate intervals in at least two rows on each side opposing each other in a direction perpendicular to the joint portion.

16. The brace lower mounting structure according to claim 1, A brace lower mounting structure characterized in that the bottom plate material is fixed across and in a direction parallel to the joints of the adjacent ceiling plates.

17. 17. The brace lower mounting structure according to claim 16, A brace lower mounting structure characterized in that fixing screws for fixing the bottom plate material and the ceiling plate are screwed at appropriate intervals in at least two rows on each side of the opposing sides of the joint portion.

18. The brace lower mounting structure according to claim 1, A brace lower mounting structure further comprising an orthogonal spanning mounting plate that is fixed across a direction perpendicular to the multiple joints of the ceiling panel, the support material and the bottom panel material in a direction perpendicular to the joints are joined by screwing, and the support material is screwed to the ceiling panel via the orthogonal spanning mounting plate, and fixing screws for fixing the orthogonal spanning mounting plate are screwed in a direction parallel to the joints in the ceiling panel and on both opposing sides of the joints at an appropriate interval in a direction parallel to the joints.

19. 20. The brace lower mounting structure according to claim 18, The brace lower mounting structure is characterized in that the fixing screws for fixing the orthogonal straddling mounting plate are screwed at appropriate intervals in at least two rows on both sides facing the joint portion on both ends of the orthogonal straddling mounting plate.

20. The brace lower mounting structure according to claim 1, A brace lower mounting structure further comprising a parallel spanning mounting plate that is fixed across a direction parallel to the joint of the ceiling panel, the support material and the bottom plate material located in the center of the parallel spanning mounting plate are joined by screws and are screwed to the ceiling panel via the parallel spanning mounting plate, and fixing screws for fixing the parallel spanning mounting plate are screwed at an appropriate interval on both sides facing each other with respect to the joint on both end sides of the parallel spanning mounting plate in a direction parallel to the joint.

21. 21. The brace lower mounting structure according to claim 20, The brace lower mounting structure is characterized in that the fixing screws for fixing the parallel straddling mounting plate are screwed at appropriate intervals in at least two rows on both sides facing each other with respect to the joint portion on both ends of the parallel straddling mounting plate.

22. The brace lower mounting structure according to claim 1, A brace lower mounting structure further comprising a spanning mounting plate that is fixed across the brace material in a direction parallel to the brace material and perpendicular to the multiple joints of the ceiling panel, the support material and the bottom panel material in the direction perpendicular to the joints are joined by screwing, and the spanning mounting plate is screwed to the ceiling panel via the spanning mounting plate, and fixing screws for fixing the spanning mounting plate are screwed in at an appropriate interval on both opposing sides of the joints in a direction parallel to the joints.

23. 23. The brace lower mounting structure according to claim 22, The brace lower mounting structure is characterized in that fixing screws for fixing the straddling mounting plate are screwed at appropriate intervals on both sides opposing each other with respect to the joint portion at both ends of the straddling mounting plate, and at least two rows of the end sides of the straddling mounting plate are screwed at appropriate intervals.

24. A brace lower attachment method for connecting a lower end of a brace material to a ceiling plate of a suspended ceiling, comprising: A bottom plate material fixed onto the ceiling plate; A support member having a brace support plate portion joined to the bottom plate material and erected vertically from the bottom plate material; a cover material having a brace cover plate portion substantially parallel to the brace receiving plate portion; a step of fixing the bottom plate material to the ceiling plate; and a step of screwing the lower end of the brace material to the brace receiving plate portion of the receiving material, and then screwing the brace cover plate portion to the brace receiving plate portion and the lower end of the brace material. A brace lower mounting method comprising:

25. 25. The brace lower attachment method of claim 24, comprising: A brace lower installation method characterized in that, before fixing the bottom plate material to the ceiling panel, the support material is joined to the bottom plate material by welding, and fixing screws fixing the bottom plate material and the ceiling panel are screwed in a direction parallel to the brace material in at least two rows per side at appropriate intervals.

26. 25. The brace lower attachment method of claim 24, comprising: A brace lower installation method characterized in that after the bottom plate material is fixed to the ceiling panel, the support material is joined to the bottom plate material by screwing and is also screwed to the ceiling panel, and at this time, the fixing screws fixing the bottom plate material and the ceiling panel are screwed in a row per side at appropriate intervals in a direction parallel to the brace material.

27. 25. The brace lower attachment method of claim 24, comprising: A brace lower mounting method, characterized in that the step of fixing the bottom plate material to the ceiling plate includes a step of fixing the bottom plate material across a direction perpendicular to the joint portion of an adjacent ceiling plate.

28. 25. The brace lower attachment method of claim 24, comprising: A brace lower mounting method, characterized in that the step of fixing the bottom plate material to the ceiling plate includes a step of fixing the bottom plate material across a direction parallel to the joints of adjacent ceiling plates.

29. A brace lower attachment method for connecting a lower end of a brace material to a ceiling plate of a suspended ceiling, comprising: A bottom plate material fixed onto the ceiling plate; A support member having a brace support plate portion joined to the bottom plate material and erected vertically from the bottom plate material; A cover material having a brace cover plate portion substantially parallel to the brace receiving plate portion; An orthogonal straddling mounting plate is provided, which is fixed across the plurality of joints of the ceiling board in a direction perpendicular to the ceiling board. A step of joining the bottom plate material and the orthogonal straddling mounting plate by screwing and fixing the bottom plate material to the ceiling plate via the orthogonal straddling mounting plate; A step of fixing the orthogonal straddling mounting plate to both sides facing the ceiling plate with respect to the joint portion; and a step of screwing the lower end of the brace material to the brace receiving plate portion of the receiving material, and then screwing the brace cover plate portion to the brace receiving plate portion and the lower end of the brace material. A brace lower mounting method comprising:

30. A brace lower attachment method for connecting a lower end of a brace material to a ceiling plate of a suspended ceiling, comprising: A bottom plate material fixed onto the ceiling plate; A support member having a brace support plate portion joined to the bottom plate material and erected vertically from the bottom plate material; A cover material having a brace cover plate portion substantially parallel to the brace receiving plate portion; A parallel straddling mounting plate is provided, which is fixed across the joints of the adjacent ceiling panels in a direction parallel to the joints of the adjacent ceiling panels. A step of joining the bottom plate material located at the center of the parallel straddling mounting plate to the parallel straddling mounting plate by screwing and fixing the parallel straddling mounting plate to the ceiling plate via the parallel straddling mounting plate; A step of fixing the parallel straddling mounting plate to both sides facing each other with respect to the joint portion at both end sides of the parallel straddling mounting plate; and a step of screwing the lower end of the brace material to the brace receiving plate portion of the receiving material, and then screwing the brace cover plate portion to the brace receiving plate portion and the lower end of the brace material. A brace lower mounting method comprising:

31. A brace lower attachment method for connecting a lower end of a brace material to a ceiling plate of a suspended ceiling, comprising: A bottom plate material fixed onto the ceiling plate; A support member having a brace support plate portion joined to the bottom plate material and erected vertically from the bottom plate material; A cover material having a brace cover plate portion substantially parallel to the brace receiving plate portion; A straddling mounting plate is provided that is fixed across the brace material in a direction parallel to the brace material and perpendicular to the plurality of joints of the ceiling panel. a step of joining the bottom plate material and the straddling mounting plate by screws and fixing the bottom plate material to the ceiling plate via the straddling mounting plate; A step of fixing the straddling mounting plate to both sides facing the ceiling plate with respect to the joint portion; and a step of screwing the lower end of the brace material to the brace receiving plate portion of the receiving material, and then screwing the brace cover plate portion to the brace receiving plate portion and the lower end of the brace material. A brace lower mounting method comprising:

Images