JP6290167B2 - Seismic reinforcement brackets, suspension ceiling seismic reinforcement structure and suspension ceiling drop-off prevention structure - Google Patents

Description

  The present invention relates to a seismic reinforcement bracket for reinforcing a suspended ceiling structure having a field edge receiving part and a field edge suspended from a building structure at the intersection between the field edge receiving part and the field edge, and The present invention relates to a seismic reinforcement structure for an attached suspended ceiling and a structure for preventing the suspended ceiling from falling off.

  As disclosed in Patent Documents 1 and 2, a field edge receiver suspended from a building structure such as a floor slab or a beam and a suspended ceiling structure having a field edge, the intersection of the field edge receiver and the field edge Seismic reinforcement brackets have been developed to reinforce parts.

  On the other hand, on August 5, 2013, a part of the Building Standard Law Enforcement Ordinance was amended to define “specific ceiling”, which is obliged to deal with the “prevention of falling off of ceilings in buildings”. In addition, “Technical Standards for Preventing Dropping” was established, and the performance target required for the ceiling was “Don't be damaged during a mid-earthquake” with respect to legal compliance by “making the ceiling earthquake resistant”.

  In short, before the law was revised, the goal was to “do not fall in the event of a major earthquake”, but the standard required for the earthquake resistance of the ceiling due to the revision of the law changed from “does not fall” to “does not damage”. As a result, seismic reinforcement metal fittings with higher performance were required. Note that the obligation to respond to legal revisions is imposed only on those defined as specific ceilings, but high-performance seismic reinforcement brackets are also desired for suspended ceiling structures other than specific ceilings.

Japanese Patent No. 4963484 Japanese Patent No. 4845212

  Therefore, an object of the present invention is to provide a seismic reinforcing metal fitting capable of imparting high rigidity and seismic performance to a suspended ceiling structure, and a seismic reinforcing structure for a suspended ceiling to which the metal frame is attached. Alternatively, it is an object of the present invention to provide a structure for preventing a suspended ceiling from falling off to prevent the suspended ceiling from falling off.

  In order to achieve the above object, a seismic reinforcing metal fitting of the present invention has a suspended ceiling structure having a field edge receiving part and a field edge suspended from a building structure, and has the field edge receiving part and a lip part. A seismic reinforcing metal fitting for reinforcing at an intersection with the field edge, the first metal part being fixed to the field edge receiving part disposed above, and the field edge part straddling the first metal part A second metal fitting fixed to the first metal fitting, and an integrated means for joining the first metal fitting and the second metal fitting, wherein the first metal fitting is folded over the edge receiving portion, and A notch portion formed in a lower portion so that the field edge portion can be fitted, and a joining means for fixing the first metal fitting to the field edge receiving portion; and the second metal fitting includes the field edge A pair of plate portions opposed to each other across the lip portion of the portion, and a hook provided at the lower portion of the plate portion on the lip portion side A bolt portion that introduces a fastening force between the plate portions in a state where the hook portion is hooked on the lip portion, a washer portion of the bolt portion, and one of the bolt portions to restrict rotation of the washer portion And a limiting rib portion protruding from the plate portion.

  Here, the pair of plate portions is constituted by a lip portion side plate portion and a stop plate portion arranged on the lip portion side, and the lip portion side plate portion and the stop plate portion straddle the first metal fitting. It is possible to adopt a configuration in which the restricting rib portion projects from the side edge of the lip portion side plate portion.

  Moreover, the said joining means can be set as the structure which is a bis | screw material which penetrates the said 1st metal fitting and the said edge receiving part. Furthermore, the said integration means can be set as the structure which is a several screw material.

  The invention of the seismic reinforcing structure for a suspended ceiling is a seismic reinforcing structure for a suspended ceiling in which a suspended ceiling structure having a field edge receiving part and a field edge part suspended from a structure of a building is reinforced. The seismic reinforcing metal fitting according to any one of the above, attached to an intersection between the edge receiving portion and the field edge having a lip portion, and along the axial direction of at least one of the field edge receiving portion and the field edge And an oblique member arranged in a substantially V shape in a side view, and a lower end of the oblique member is attached to at least one of the first metal fitting and the second metal fitting.

  Further, it is a seismic reinforcement structure for a suspended ceiling in which a suspended ceiling structure having a field edge receiving portion and a field edge portion suspended from a building structure, wherein the field having the field edge receiving portion and the lip portion is provided. The seismic reinforcing metal fitting according to any one of the above, attached to an intersection with an edge, and a pair of oblique members in a field receiving direction disposed in a substantially V shape in a side view along the axial direction of the field receiving part And a pair of sloped members in the field edge direction arranged in a substantially V shape in a side view along the axial direction of the field edge portion, and the lower end of the pair of field edge receiving direction oblique members is the first metal fitting And the bottom end of the pair of field-direction oblique members is attached to the second metal fitting.

  Further, with respect to the field edge receiving part to which the seismic reinforcement metal fitting is attached, the field edge receiving part is joined to the field edge receiving part at the intersection of the field edge receiving part and the field edge part on both sides of the earthquake resistant reinforcement metal fitting. In addition, a reinforcing clip whose lower part is fixed to the field edge portion may be attached.

  Further, the invention of the suspended ceiling drop-off preventing structure is a suspended ceiling drop-off preventing structure that reinforces a suspended ceiling structure having a field edge receiving part and a field edge part suspended from a structure of a building. Any one of the above-mentioned seismic reinforcing metal fittings is attached as a joining metal fitting at an intersection between the edge receiving portion and the field edge portion having a lip portion.

  The seismic strengthening metal fitting of the present invention configured as described above reinforces the suspended ceiling structure at the intersection of the field edge receiving part and the field edge part having the lip part. In this seismic reinforcing metal fitting, the first metal fitting fixed to the field edge receiving portion is straddled with the second metal fitting fixed to the field edge portion, and the two metal fittings are joined by the integration means.

  The second metal fitting has a restriction rib portion protruding from a pair of plate portions opposed to each other with the lip portion of the field edge interposed therebetween, and the rotation of the washer portion of the bolt portion is restricted by the restriction rib portion. .

  For this reason, the washer part is arranged in the correct orientation, and the fastening force by the bolt part is introduced in a desired size so that the lip part can be crushed. Therefore, high rigidity and seismic performance are added to the suspended ceiling structure. It becomes possible to grant.

  By causing the restriction rib portion that restricts the rotation of the washer portion to protrude from the side edge of the lip portion side plate portion, the rigidity of the lip portion side plate portion itself against bending can be increased.

  Furthermore, it can be set as the firm joining by the shear resistance of screw material by making the joining means for fixing a 1st metal fitting to a field edge receiving part into the screw material which penetrates both. Further, by using a plurality of screw members as the means for integrating the first metal fitting and the second metal fitting, the bonding strength can be increased and the integrity of both can be further enhanced.

  And if it is the earthquake-proof reinforcement structure which attaches the lower end of the diagonal member arrange | positioned in the side view substantially V shape to an earthquake-proof reinforcement metal fitting, it can be set as the structure where axial force is transmitted effectively. In particular, if the seismic reinforcement structure is attached in such a manner that the lower ends of the oblique members arranged in a substantially V shape in the two directions in a side view are attached to the seismic reinforcement brackets, the work can be concentrated and efficiently constructed.

  Furthermore, if a reinforcing clip is attached to the intersection between the field edge receiving part and the field edge part on both sides of the seismic reinforcement bracket, the axial force transmitted from the diagonal member in the field edge receiving direction can be extended over a wide range of the ceiling. Can be dispersed. Furthermore, it is possible to construct a seismic reinforcement structure for a suspended ceiling that is excellent in isotropy.

  In addition, a suspended ceiling with a seismic reinforcement structure can be said to be a suspended ceiling structure that prevents seismic reinforcement from being attached as a joint fitting at the intersection between the field edge receiving portion and the field edge having a lip portion. Even if there is no drop, it can be sufficiently prevented if it falls off due to wind sway or the continuous action of a vertical load.

It is a perspective view for demonstrating the structure of the earthquake-proof reinforcement structure of the suspended ceiling of embodiment of this invention. It is sectional drawing for demonstrating the structure of the earthquake-proof reinforcement structure of the suspended ceiling of embodiment of this invention. It is a perspective view for demonstrating the structure of the earthquake-resistant reinforcement metal fitting of embodiment of this invention. It is a top view for demonstrating the structure of the earthquake-proof reinforcement metal fitting of embodiment of this invention. It is sectional drawing seen in the AA arrow direction of FIG. It is sectional drawing seen in the BB arrow direction of FIG. It is sectional drawing seen in the CC arrow direction of FIG. It is sectional drawing seen in the DD arrow direction of FIG. It is an expansion perspective view for demonstrating the transmission path | route of the brace axial force of a field edge receiving direction. It is a perspective view for demonstrating the transmission path | route of the brace axial force of a field edge receiving direction when a reinforcement clip is arrange | positioned.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are diagrams for explaining a configuration of a suspended ceiling structure 1 that is a seismic reinforcement structure for a suspended ceiling according to the present embodiment.

  The suspended ceiling structure 1 is provided, for example, in various buildings such as a gymnasium, a meeting place, a public facility serving as a base for disaster emergency measures, and a building. The seismic reinforcement structure of the present embodiment can be applied to both existing suspended ceilings and newly installed suspended ceilings. In addition, it can be applied to suspended ceilings other than those defined as “specific ceilings” in order to improve seismic performance.

  As shown in FIG. 2, a plurality of suspension bolts 13 are suspended at intervals on the lower surface of the beam or floor slab 11 serving as a building structure, and a hanger at the lower end of the suspension bolt 13. The field edge receiving portion 14 is suspended from 131.

  As shown in FIG. 1, the field edge portions 15,... Are attached in a direction substantially orthogonal to each other with an interval in the axial direction of the field edge receiving portion 14. Further, a ceiling plate material 16 such as a gypsum board is attached to the lower surface of the field edge portions 15.

  When the suspended ceiling corresponds to a “specific ceiling”, as shown in FIG. 2, the end 16a of the ceiling plate 16 is separated from the wall surface 12 of the building by 6 cm or more, and the end 16a is shaken during an earthquake. Can be prevented from being pressed against the wall surface 12 and being damaged.

  The suspended ceiling structure 1 of the present embodiment includes a pair of braces 21 and 21 as diagonal members in the field receiving direction, arranged in a substantially V shape in a side view along the axial direction of the field receiving part 14, and a field edge A pair of braces 22 and 22 as oblique members in the field direction are provided along the axial direction of the portion 15 in a substantially V shape in a side view.

  The upper end of the brace 21 is fixed to the upper part of the suspension bolt 13 via the attachment metal 212. Further, the upper end of the brace 22 is also fixed to the upper part of the suspension bolt 13 via the mounting hardware 222.

  On the other hand, the seismic reinforcement bracket 3 of the present embodiment is attached to the intersection between the field edge receiving portion 14 and the field edge portion 15. Then, the lower ends of the braces 21, 22, 22, 22 are attached to the seismic reinforcement bracket 3.

  Specifically, as shown in FIG. 3, braces 21 and 21 are attached to the first metal fitting 4 of the seismic reinforcement bracket 3 via arm members 211 and 211, and the braces 22 and 21 are attached to the second metal fitting 5 of the earthquake resistance reinforcement fitting 3. 22 is attached via arm members 221 and 221.

  Here, the edge receiving portion 14 to which the hanger 131 of the suspension bolt 13 is hooked is, for example, an upper flange 141 that forms a substantially horizontal plane, a lower flange 142 that is substantially parallel thereto, and a side edge between the upper flange 141 and the lower flange. Are formed in a substantially U shape in a sectional view.

  On the other hand, the field edge 15 fixed to the field edge receiver 14 is bent inward twice from the bottom 153, the side walls 152, 152 rising from both sides thereof, and the respective upper edges of the side walls 152, 152. The lip portions 151 and 151 are formed. That is, a steel material having a substantially U-shaped cross section having lip portions 151 and 151 can be used for the field edge portion 15. The lip 151 is formed in a substantially L-shaped cross section by the upper surface and the hanging surface.

  As shown in FIG. 3 to FIG. 8, the seismic reinforcement bracket 3 includes a first bracket 4 fixed to a field edge receiving portion 14 disposed above, and a field edge 15 straddling the first bracket 4. It is mainly comprised by the 2nd metal fitting 5 to be fixed, and the integrated means which joins the 1st metal fitting 4 and the 2nd metal fitting 5. FIG.

  The first metal fitting 4 includes a bent part 41 provided in the center and straddling the field edge receiving part 14, a notch part 42 formed in the lower part so that the field edge part 15 can be fitted, It is mainly comprised by the screw material 43 as a joining means which fixes 1 metal fitting 4 to the field edge receiving part 14. FIG.

  As shown in FIGS. 3, 7, and 8, the bent portion 41 is formed in a substantially portal shape in cross section so as to cover the field edge receiving portion 14 from above. In short, the bent portion 41 is formed in a shape that covers the upper side and both sides of the field edge receiving portion 14.

  And the lower part of the bending part 41 is provided with the notch part 42 notched in the shape where the upper part of the field edge part 15 can be fitted, as shown in FIG.3, FIG.5, FIG.6. In short, the upper and both sides of the field edge 15 are surrounded by the notch 42.

  The bent part 41 formed in this way is placed on the upper flange 141 of the field edge receiving part 14 and the notch part 42 is fitted into the field edge part 15 below, so that 1 metal fitting 4 is mounted.

  Further, on both sides sandwiching the bent portion 41, as shown in FIGS. 5 and 6, the screw members 43 and 43 are continuously passed through the web 143 of the field edge receiving portion 14 and the first metal fitting 4, Join them together.

  As a result, the first metal fitting 4 is fixed to the field edge receiving portion 14. And in this state, even if the field edge receiving part 14 and the field edge part 15 are not joined, the movement of the 1st metal fitting 4 to directions other than the axial direction of the field edge part 15 will be restrict | limited. .

  Further, as shown in FIG. 4, ribs 44, 44 are stretched on both side edges in the axial direction of the field receiving portion 14 of the first metal fitting 4 in a direction substantially parallel to the axial direction of the field edge 15. Is issued. The ribs 44 can increase the rigidity of the first metal fitting 4 manufactured by bending a plate material such as a steel plate.

  Further, as shown in FIGS. 4, 7, and 8, a cutout portion 451 in which three sides of a rectangle are cut is provided on a part of the upper surface of the bent portion 41, and the rising piece 45 is Is caused.

  In this way, the second metal fitting 5 is straddled from above the first metal fitting 4 attached to the field edge receiving portion 14. The second metal fitting 5 has a pair of plate portions (51, 52) opposed to each other with one lip portion 151 of the field edge portion 15 interposed therebetween.

  The pair of plate portions (51, 52) are each formed of a substantially gate-shaped steel plate or the like so as to be able to straddle the field edge receiving portion. Here, the plate portion disposed on the lip portion 151 side (inside the field edge portion 15) is referred to as a lip portion side plate portion 51, and the plate portion disposed outside the field edge portion 15 is referred to as a stop plate portion 52.

  As shown in FIGS. 5 and 6, a hook portion 53 having a substantially letter shape in side view is provided below the lip portion side plate portion 51. The hook 53 is provided at a position where the hook 53 is hooked from below.

  As shown in FIGS. 3 and 7, the hook 53 is cut into the upper side and both sides of the rectangle with respect to a part of the lower part of the lip side plate part 51, and is brought down to the lip 151 side. It is formed.

  On the other hand, the bolt part 54 is penetrated above the hook part 53 with the lip part 151 interposed therebetween. As shown in FIG. 8, a nut 541 is attached to the front end of the bolt portion 54 that penetrates from the lip portion side plate portion 51 toward the stop plate portion 52 and protrudes toward the stop plate portion 52 side.

  On the other hand, a washer portion 55 formed of a rectangular (substantially square) steel plate or the like is disposed on the head side of the bolt portion 54 as shown in FIG. That is, the fastening force introduced between the lip portion side plate portion 51 and the stop plate portion 52 by tightening the bolt portion 54 is transmitted through the surface where the washer portion 55 and the lip portion side plate portion 51 are in contact.

  And in order to restrict | limit rotation of this washer part 55, from the side edge of the lip | rip part side board part 51, as shown in FIG. In detail, as shown in FIGS. 4 and 7, both side edges in the axial direction of the field edge 15 of the lip part side plate part 51 are restricted toward a direction substantially parallel to the axial direction of the field receiving part 14. The rib portions 56, 56 are projected.

  And the rigidity of the lip | rip part side board part 51 manufactured by bend | folding board | plate materials, such as a steel plate, by the limitation rib parts 56 and 56 can be improved. Furthermore, as shown in FIGS. 5, 6, and 8, both side edges in the axial direction of the field edge 15 of the stopper plate 52 are directed in a direction substantially parallel to the axial direction of the field edge receiver 14. The ribs 521 and 521 are extended to increase the rigidity.

  Further, as shown in FIGS. 5 and 6, a flange portion 511 is projected on the upper edge of the lip portion side plate portion 51 so as to cover the upper portion of the stopper plate portion 52. Further, as shown in FIGS. 3 and 4, the joining piece 57 projects from the vicinity of the center of the lip portion side plate portion 51 in the height direction.

  When a fastening force is introduced between the plate portions (51, 52) by the bolt portion 54, the lip portion 151 is crushed and the second metal fitting 5 is fixed to the field edge portion 15. That is, when the tightening force of the bolt part 54 is transmitted to the lip part side plate part 51 via the washer part 55, the lip part 151 in contact therewith is deformed and crushed.

  And the 2nd metal fitting 5 crimped | bonded by the introduce | transduced fastening force and the deformed lip | rip part 151 will restrict | limit the movement to the axial direction of the field edge part 15. FIG. Further, the movement in the axial direction of the field part 15 of the second metal part 5 is also limited by the lip part side plate part 51 and the stop plate part 52 which are formed in a gate shape and straddle the first metal part 4 and the field edge receiving part 14. Is done.

  Further, the joining piece 57 that protrudes from the lip part side plate part 51 so as to be substantially orthogonal and is disposed along the outer surface of the bent part 41 is an integral part that joins the first metal fitting 4 and the second metal fitting 5 together. A plurality of screw members 31, 31 as means are screwed.

  As shown in FIGS. 3, 5, and 7, two screws 31 and 31 are screwed up and down. Screw members 31, 31 penetrate through the joining piece 57 and the bent portion 41, and their tips protrude into the inner space of the field edge receiving portion 14 as shown in FIG. 7.

  As shown in FIG. 3 and FIG. 4, the lower ends of the braces 21 and 22 are provided in the high-strength seismic reinforcement bracket 3 that is firmly fixed to the intersection of the field edge receiving portion 14 and the field edge portion 15 in this manner. The arm members 211 and 221 having a substantially L-shaped cross-sectional view are attached.

  Specifically, as shown in FIGS. 5 and 6, the arm members 211 and 211 are connected to the corners on both sides of the upper portion of the first metal fitting 4 by bolts 23 and 23. Further, the angle of the arm material 211 is fixed by the anti-rotation screw 24. The anti-rotation screw 24 is inserted from the hole of the arm member 211 and driven into the corner portion of the first metal fitting 4. Further, the arm material 211 and the brace 21 are connected by the joining screws 25 and 25, so that a stress can be transmitted.

  On the other hand, as shown in FIGS. 7 and 8, the arm members 221 and 221 are connected to the corners on both sides of the upper portion of the second metal fitting 5 by bolts 23 and 23. Further, the angle of the arm material 221 is fixed by the rotation prevention screw 24. The anti-rotation screw 24 is inserted from the hole of the arm member 221 and driven into the corner portion of the lip portion side plate portion 51 of the second metal fitting 5.

  Here, as shown in FIG. 8, the stopper plate 52 of the second metal fitting 5 that is opposed to the lip portion side plate 51 is cut off at the upper corners as cut portions 522 and 522, The arm member 221 can be fixed without passing the rotation stop screw 24 through the stop plate portion 52. Further, the arm member 221 and the brace 22 are connected by the joining screws 25 and 25, and a structure capable of transmitting stress is obtained.

  On the other hand, as shown in FIG. 9, reinforcing clips 6, 17 B and 17 B adjacent to the intersecting portion 17 A to which the seismic reinforcing metal fitting 3 to which the four braces 21, 22, 22 and 22 are gathered are attached. 6 is attached.

  More specifically, at the intersections 17B and 17B of the field edge receiving portions 14 and the field edge portions 15 and 15 on both sides of the earthquake resistant reinforcement metal fitting 3 with respect to the field edge receiving portion 14 to which the earthquake resistant reinforcement metal fitting 3 is attached. The reinforcing clips 6 and 6 are respectively attached.

  In the following, a case where one reinforcing clip 6 is arranged on each side of the seismic reinforcing bracket 3 will be described, but the present invention is not limited to this, and a plurality of reinforcing clips 6,.・ ・ Can also be placed.

  As shown in FIG. 10, the reinforcing clip 6 is stronger than the ordinary clip 7 attached to the intersection of the field edge receiving part 14 and the field edge part 15 to which the seismic reinforcing metal fitting 3 is not attached. The part 14 and the field edge 15 are connected.

  As shown in FIG. 9, the reinforcing clip 6 is a clip 61 with a screw fixed across the field edge receiving portion 14, and a reinforcement for fixing the lower portion of the clip 61 with a screw to the field edge receiving portion 14 and the field edge portion 15. It is mainly composed of hardware 62.

  The clip 61 with a screw is formed in a substantially inverted U shape in a sectional view, and the head is fastened by a screw material 611. Further, the reinforcing hardware 62 is joined to the field edge receiving portion 14 by a screw material 622. And the lower part of the clip 61 with a screw | thread is firmly joined also to the field edge part 15 by the reinforcement metal fitting 62, the screw material 621, etc. which were joined to the field edge receiving part 14 as mentioned above.

  Next, the effect | action of the earthquake-proof reinforcement metal fitting 3 and the suspended ceiling structure 1 of this Embodiment is demonstrated.

  The seismic reinforcing metal fitting 3 of the present embodiment configured as described above reinforces the suspended ceiling structure at the intersection 17A between the field edge receiving part 14 and the field edge part 15 having the lip parts 151 and 151.

  In this seismic reinforcement bracket 3, the first bracket 4 fixed to the field edge receiving portion 14 spans the second metal bracket 5 fixed to the field edge portion 15, and the two brackets are integrated as two means. The screws 31 and 31 are joined.

  The second metal fitting 5 has a limiting rib portion 56 protruding from the lip portion side plate portion 51 of the pair of plate portions (51, 52) opposed to each other with the lip portion 151 of the field edge portion 15 interposed therebetween. The rotation of the washer portion 55 is restricted by the restriction rib portion 56.

  In other words, if the restriction rib portion 56 is not provided, the washer portion 55 rotates together when the bolt portion 54 is tightened, and the entire surface of the washer portion 55 may not be brought into contact with the lip portion side plate portion 51. . When the contact area between the two is reduced, the fastening force introduced from the bolt part 54 is reduced accordingly, so that the force for crushing the lip part 151, in other words, the force for fixing the second metal fitting 5 to the field edge part 15 ( (Fixedness) may decrease.

  On the other hand, if the washer part 55 is arranged in the correct orientation and the entire surface of the washer part 55 is in contact with the lip part side plate part 51, the fastening force by the bolt part 54 is introduced in a desired size as designed. Thus, the lip 151 can be crushed within the designed range.

  Here, in the hole for passing the bolt part 54 through the lip part side plate part 51, an internal thread groove may be provided to increase the bonding strength between the bolt part 54 and the lip part side plate part 51. Moreover, even if it is only a penetration hole, if the washer part 55 is arrange | positioned in the exact direction, the design force desired can be introduce | transduced.

  Furthermore, if the limiting rib portions 56 and 56 that limit the rotation of the washer portions 55 and 55 are projected from both side edges of the lip portion side plate portion 51, the rigidity of the lip portion side plate portion 51 itself against bending is also increased. be able to. As a result, the suspended ceiling structure 1 having high rigidity and earthquake resistance can be obtained.

  Furthermore, by using the screw member 43 that penetrates both of the bonding means for fixing the first metal fitting 4 to the field edge receiving portion 14, the screw member 43 can be firmly bonded by the shear resistance.

  In short, if the screw 43 having the first metal fitting 4 penetrated directly into the web 143 of the field edge receiving portion 14 is directly screwed, the gap between the field edge receiving portion 14 and the first metal fitting 4 is not strong. Can be joined.

  Further, by using a plurality of screw members 31, 31 as the means for integrating the first metal fitting 4 and the second metal fitting 5, the bonding strength is increased as compared with the case of integrating with a single screw material. The integrity of both can be further increased.

  And, if the seismic reinforcement structure that attaches the lower ends of the braces 21, 21, 22, and 22 arranged in a substantially V shape in two directions to the seismic reinforcement bracket 3, the workability is good and efficient. Can be built.

  When the braces 21, 22, 22, 22 are thus connected to the intersection 17 </ b> A via the seismic reinforcement bracket 3, the force from the braces 21, 22 is transmitted to the ceiling plate material 16.

  In short, if the lower ends of the braces 21, 22, 22, 22 arranged in a substantially V shape in side view are attached to the seismic reinforcement bracket 3, the axial force can be effectively fixed.

  For example, as shown in FIG. 9, when the seismic force Q acts in the axial direction of the field edge receiving portion 14, the brace axial forces P <b> 1 and P <b> 2 of the braces 21 and 21 are input to the seismic reinforcement bracket 3.

  The transmission force R0 transmitted from the seismic reinforcement bracket 3 to the field edge 15 just below is transmitted as the transmission force R1 through the earthquake resistance reinforcement bracket 3 in the axial direction (material axis direction) of the field edge 15 and 15 and the ceiling plate material 16 are transmitted to the ceiling plate material 16 as transmission forces R2,.

  Here, the connection between the field edge receiving portion 14 to which the seismic reinforcement bracket 3 is attached and the intersection portions 17B and 17B of the field edge portion 15 other than the intersection portion 17A to which the earthquake resistance reinforcement metal fitting 3 is attached is the connection strength. When the process is performed with a weak normal clip 7, no further stress distribution can be expected.

  On the other hand, as shown in FIG. 10, by arranging the reinforcing clips 6 and 6 having high connection strength at the intersecting portions 17B and 17B adjacent to both sides of the intersecting portion 17A to which the seismic reinforcing metal fitting 3 is attached, Force can be distributed over a wide area of the ceiling.

  That is, the brace axial forces P1 and P2 are transmitted as the transmission force T along the field edge receiving portion 14, and then efficiently transmitted to the field edge portions 15 and 15 via the reinforcing clips 6 and 6. And is distributed to the ceiling plate material 16 as transmission forces S2,... At the positions of the fastening screws 161 from the respective field edge portions 15, 15. Since the flow of explanation is emphasized, the transmission forces T, S1, and S2 at the positions of the reinforcing clips 6 and 6 are not shown in FIG.

  If the reinforcing clips 6,... Are attached to the intersecting portions 17B of the field edge portions 15 where the field edge receiving portions 14 to which the seismic reinforcing metal fittings 3 are attached intersect in this way, The brace axial forces P1 and P2 transmitted from the braces 21 and 21 can be dispersed in a wide range of the ceiling plate material 16.

  On the other hand, for the seismic force acting in the axial direction of the field edge 15, the axial force of the braces 22, 22 is transmitted as it is from the seismic reinforcement bracket 3 to the field edge 15 directly below, and via the field edge 15. And efficiently distributed to the ceiling board material 16.

  In particular, in the case of the seismic reinforcement metal fitting 3 according to the present embodiment, the washer portion 55 is arranged in the correct orientation by the restriction rib portion 56, and the lip portion 151 in a desired range is crushed so that the field edge portion of the second metal fitting 5 is obtained. Since 15 axial displacements can be prevented, stress can be efficiently transmitted in the field edge direction with stable performance.

  And the suspended ceiling structure 1 in which the reinforcing clips 6,... Are arranged can distribute the force efficiently not only in the field edge direction but also in the field edge receiving direction. The suspended ceiling structure 1 having excellent properties can be obtained.

  In short, since it can be used freely except for the intersection 17A to which the seismic reinforcement brackets 3 ... are attached, it can be combined with other reinforcement brackets and has excellent expandability and versatility. ing.

  For example, the performance improvement in the field receiving direction due to the dispersion can be controlled by the number of the reinforcing clips 6 attached to the field receiving part 14, so that the reinforcing clip 6 can be aligned with the structural performance in the field edge direction. By setting the number to be arranged, it is possible to make the suspended ceiling structure 1 excellent in isotropy as the entire ceiling.

  And if it is the suspended ceiling structure 1 excellent in the isotropy with respect to a horizontal force, since the number of sets of braces 21, 21 (22, 22) becomes the same in any direction, the direction in which a large number of sets should be arranged There is no mistake and construction mistakes can be prevented.

  In addition, by using the seismic reinforcement bracket 3 according to the present embodiment, the existing suspended ceiling structure can be easily modified to a structure that has high rigidity and seismic performance that does not damage during a mid-earthquake that conforms to the law revision. it can.

  That is, since the existing suspended ceiling structure is provided with the suspension bolts 13,..., The field edge receiving part 14,. Simply attach the seismic reinforcement bracket 3 to the intersection 17A with the section 15 and connect the seismic reinforcement bracket 3 and the upper part of the suspension bolts 13 with four braces 21, 21, 22, 22 respectively. Can perform stiffening and earthquake resistance.

  At this time, the weight added to the existing suspended ceiling structure is only the weight of the seismic reinforcement brackets 3... And the weight added by the reinforcement clips 6. An increase in the weight of the ceiling structure 1 is suppressed, and a structure that is advantageous in design can be obtained.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, in the above-described embodiment, the suspended ceiling structure 1 in which the seismic reinforcing metal fitting 3 and the reinforcing clips 6,... Are arranged is not limited to this, and desired rigidity and earthquake resistance are provided. If satisfied, the reinforcing clips 6,... Can be omitted.

  Moreover, in the said embodiment, about the suspended ceiling structure 1 provided with a pair of braces 21 and 21 and braces 22 and 22 in the side view substantially V shape along the axial direction of the field edge receiving part 14 and the field edge part 15, respectively. Although described, the present invention is not limited to this, and a suspended ceiling in which a pair of diagonal members are arranged in a substantially V shape in a side view along the axial direction of either the field edge receiving part 14 or the field edge part 15. It can also be a seismic reinforcement structure.

  Furthermore, the seismic reinforcing metal fitting 3 can be used not only for attaching the braces 21 and 22 but only for firmly joining the intersection of the field edge receiving portion 14 and the field edge portion 15. For example, by using the earthquake-resistant reinforcing metal fitting 3 in place of the reinforcing clip 6 described above, a suspended ceiling structure that does not easily fall off even if the shake greatly increases due to a large earthquake can be obtained.

  Moreover, the joint strength of the crossing part of the field edge receiving part 14 and the field edge part 15 can be raised, and the fall prevention effect of a ceiling can also be heightened. For example, even if it is a suspended ceiling where diagonal members such as braces 21 and 22 are not disposed, by attaching the seismic reinforcement bracket 3 to the intersection as a joint bracket, falling off due to wind sway or continuous action of vertical load, etc. Can be prevented.

1 Suspended ceiling structure (seismic reinforcement structure for suspended ceiling)
11 Floor slabs (building structures)
14 Field edge receiving part 15 Field edge part 151 Lip part 17A Crossing part 21 Brace (oblique member in the field edge receiving direction)
22 Brace (Slanting member in the edge direction)
3 Seismic reinforcement bracket 31 Screw material (integration means)
4 1st metal fitting 41 Bending part 42 Notch part 43 Screw material (joining means)
5 Second metal part 51 Lip part side plate part (plate part)
52 Stop plate (plate)
53 Hooking part 54 Bolt part 55 Washer part 56 Restriction rib part 6 Reinforcement clip

Claims (6)

This is a seismic reinforcement bracket that reinforces a suspended ceiling structure having a field edge receiving portion and a field edge suspended from a building structure at the intersection of the field edge receiving portion and the field edge having a lip portion. And
A first fitting fixed to the field receiving portion disposed above;
A second fitting fixed to the edge portion across the first fitting;
A plurality of screws for joining the first metal fitting and the second metal fitting;
The first metal fitting includes a bent portion straddling the field edge receiving portion, a notch formed at a lower portion so that the field edge portion can be fitted, the first metal fitting and the field edge. A screw material that is continuously penetrated to the web of the receiving part and joined so as not to cause a shift between the two due to shear resistance ;
The second metal fitting includes a pair of plate portions opposed to each other with the lip portion of the field edge portion interposed therebetween, a hook portion provided at a lower portion of the plate portion on the lip portion side, and the hook portion being the lip A bolt part for introducing a fastening force between the plate parts in a state of being hooked on the part, a washer part of the bolt part, one plate part for restricting rotation of the washer part and increasing rigidity against bending An anti-seismic reinforcing metal fitting, characterized by having a restriction rib portion protruding from the base.   The pair of plate portions is constituted by a lip portion side plate portion and a stop plate portion arranged on the lip portion side, and the lip portion side plate portion and the stop plate portion are substantially gated so as to straddle the first metal fitting. The seismic reinforcement bracket according to claim 1, wherein the seismic reinforcing metal fitting is formed in a shape and the restriction rib portion projects from a side edge of the lip portion side plate portion. A seismic reinforcement structure for a suspended ceiling obtained by reinforcing a suspended ceiling structure having a field edge receiving portion and a field edge suspended from a building structure,
The seismic reinforcing metal fitting according to claim 1 or 2, attached to an intersection of the field edge receiving part and the field edge part having a lip part,
An oblique member arranged in a substantially V shape in a side view along the axial direction of at least one of the field receiving portion and the field edge,
A suspended ceiling earthquake-proof reinforcement structure, wherein a lower end of the oblique member is attached to at least one of the first metal fitting and the second metal fitting. A seismic reinforcement structure for a suspended ceiling obtained by reinforcing a suspended ceiling structure having a field edge receiving portion and a field edge suspended from a building structure,
The seismic reinforcing metal fitting according to claim 1 or 2, attached to an intersection of the field edge receiving part and the field edge part having a lip part,
A pair of slanted members in the field receiving direction disposed in a substantially V shape in a side view along the axial direction of the field receiving part,
A pair of field edge oblique members disposed in a substantially V shape in a side view along the axial direction of the field edge,
A lower end of the pair of field edge receiving direction oblique members is attached to the first metal fitting, and a pair of field edge direction oblique member lower ends are attached to the second metal fitting. Seismic reinforcement structure for suspended ceilings.   The field edge receiving portion to which the seismic reinforcement bracket is attached is joined to the field edge receiving portion at the intersection of the field edge receiving portion and the field edge portion on both sides of the earthquake resistant reinforcement bracket. The suspension ceiling seismic reinforcement structure according to claim 3 or 4, further comprising a reinforcing clip having a lower part fixed to the field edge. A structure for preventing a suspended ceiling from being dropped by reinforcing a suspended ceiling structure having a field edge receiving portion and a field edge suspended from a structure of a building,
A structure for preventing a suspended ceiling from falling off, wherein the seismic reinforcing metal fitting according to claim 1 or 2 is attached as a joint metal at an intersection between the field edge receiving portion and the field edge portion having a lip portion. .