JP2016145474A - Collapse prevention method of ceiling side non-structural member in structure and structure thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collapse prevention method of a ceiling side non-structural member comprising a finishing material, equipment, etc., of a structure, and provide a collapse prevention structure thereof.SOLUTION: A collapse prevention method is characterized as follows: ceiling side non-structural members 2 installed in a predetermined partition area 3 of a ceiling side surrounded by a skeleton side structural material 1 such as a beam 1a or a column 1c are assumed as support target members; each of the ceiling side non-structural members 2 is supported, by supporting surfaces 12 of multiple high ductile materials 11, which are flat and comprise tape-shaped fabric where the rigidity other than the drawing is negligibly smaller than the rigidity of the support target member, to a skeleton side structural material 1 positioned in the vicinity through a fixing part obtained by fixing and forming each one end 13 side and the other end 14 side using high toughness adhesives 21 and/or fastening fittings 31 in the state where it is maintained substantially equally while keeping looseness in each of halfway parts 15 positioned in a ceiling breast 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ceiling-side finishing material such as a ceiling material and a ceiling-side equipment such as an air conditioner, a duct, and a pipe in a structure including a building and a civil engineering structure (in the present specification, these are referred to as “ceiling-side non-structural materials”. This is a technique related to a method of preventing collapse due to an earthquake or the like and a structure thereof.

  The earthquake, etc. on March 11, 2011 has caused a large number of casualties due to the collapse of the ceiling, etc. due to a major earthquake, and the facility cannot be used for a long time. Request. In response to this request, “Guidelines for Preventing Accidents of Non-Structural Materials such as Ceilings” (Non-Patent Document 1) and “Guidelines for Safety Measures for Falling Non-Structural Materials such as Ceilings” (non-patented) References 2) are published by the Architectural Institute of Japan.

Architectural Institute of Japan: Special Investigation Committee on Safety Evaluation of Nonstructural Materials and Prevention of Falling Accidents: “Guidelines for Preventing Falling Nonstructural Materials such as Ceilings” March 4, 2013 Architectural Institute of Japan: “Guidelines for Safety Measures for Falling Non-Structural Materials such as Ceilings / Same Commentary” January 20, 2015

  However, the conventional techniques proposed in Non-Patent Documents 1, 2 etc. all prevent the fall by replacing the clip of the ceiling material base with a screw-containing one, or insert an iron diagonal material between the suspension bolts. Since it is rigidly connected to suppress shaking, there is a problem that construction is difficult, and there is still a problem that there is a risk of falling and falling when encountering shaking exceeding the expected level. In addition, although it has been proposed to replace the ceiling material with a lightweight one that will not injure human lives even if it falls, such a light weight ceiling material should have been the reason for its own installation. There is a possibility that required performance such as heat insulation cannot be fully exhibited. In addition, the fall prevention net illustrated as fail-safe is low in design, and it is necessary to pay attention to the details of the fixing part, and the fall prevention wire is used to prevent the ceiling plate itself from falling. The unsuitability is as described in Non-Patent Document 2.

  The present invention has been made in view of the above-mentioned problems found in the prior art, and stably supports a ceiling-side non-structural material composed of a finishing material of a structure, equipment, etc., and prevents collapse due to an earthquake or the like. An object of the present invention is to provide a collapse prevention method and a collapse prevention structure for a ceiling-side non-structural material in a structure that can be used.

  The present invention has been made to achieve the above object, and a first invention (a method for preventing collapse) is provided in a predetermined partition area on the ceiling side surrounded by a frame-side structural material such as a beam or a column. The installed ceiling-side non-structural material is a support target member, and each of the ceiling-side non-structural material is flat and has a tape-like woven fabric whose rigidity other than tension is negligibly smaller than the rigidity of the support target member. Position the one end side and the other end side in the vicinity of each other while loosening each halfway part located in the ceiling pocket under the condition of being held almost evenly by a plurality of high ductility materials. The main feature is that the housing side structural member is supported through a fixing portion formed by fixing using a high-tough adhesive and / or a fastening metal.

  Further, in the first invention, when the ceiling-side non-structural material is a ceiling material in the compartment located in the predetermined partition region, the highly ductile material is separated from the ceiling material in the partition at intervals of about 2 m in length and width. Two or more of each of the holding surfaces facing the lower surface side of the ceiling material in the compartment are arranged substantially orthogonally so that they can be supported under a state in which the holding surfaces are joined to the lower surface side through a high-tough adhesive, The one end portion and the other end portion of the highly ductile material are respectively provided to the ceiling pocket through slits provided separately in the respective peripheral edge portions of the intra-compartment ceiling material in a corresponding positional relationship. It is desirable to support the ceiling material in the compartment by drawing it in and fixing it to the structural member on the frame side. In this case, the ceiling-side non-structural material may include a ceiling-side installation instrument such as an illuminating lamp or a ventilation fan attached to the ceiling material in the compartment.

  Furthermore, in the first invention, when the ceiling-side non-structural material is one or more ceiling-mounting equipment in the predetermined partition region, the high ductility material is at least two pieces per one ceiling-mounting equipment. It is arranged to be able to hold the ceiling pocket installation tool, and the one end side and the other end side of each of the high ductility materials are fixed separately to the casing side structural material in the ceiling pocket. It is desirable to support the ceiling installation device.

  On the other hand, 2nd invention (collapse prevention structure) uses the fall prevention method of the ceiling side non-structural material in any one of Claims 1 thru | or 4, and each of the said ceiling side non-structural material which is said support object member The most important feature is that the frame-side structural member is supported separately. In this case, the highly ductile material positioned between the fixing unit and the slit or between the fixing unit and the ceiling installation device is installed with a slack of up to about 100 mm. desirable.

  According to the first aspect of the present invention, the ceiling-side non-structural material as the support target member installed in the predetermined partition region on the ceiling side is substantially uniformly held by a plurality of high ductility materials. Originally, the respective one end side and the other end side are fixed separately to the above-mentioned structural body side member located in the vicinity while giving looseness to each midway part located in the ceiling pocket. Since it can be supported, there is a great contribution to reducing earthquake disasters by reliably preventing the collapse of an earthquake. In addition, since the high ductility material is fixed with moderate looseness, equipment such as piping and existing suspension fittings are not damaged even during the fixing work or when it is shaken by a large earthquake or the like.

  Moreover, since the high ductility material is flat and is formed of a tape-shaped woven fabric whose rigidity other than tension is negligibly smaller than the rigidity of the member to be supported, it can be bent or twisted so that the ceiling pocket Since existing facilities and existing suspension tools can be easily displaced, construction can be performed quickly without damaging these existing facilities and existing suspension hardware. In addition, the fixing place and construction method can be selected flexibly and appropriately in response to the local situation, so that construction is not impossible. In addition, fixing of the one end portion and the other end portion of the high ductility material to the housing side structural material side can be reliably performed by a fixing portion formed by using a high toughness adhesive and / or a fastening bracket. it can. Furthermore, the construction can be carried out by simple manual work by determining the arrangement and specifications of the high ductility material and the fixing portion based on the preliminary investigation.

  According to the second aspect of the present invention, since the non-structural material on the ceiling side is the ceiling material in the compartment, two or more high ductility materials are provided on the lower surface of the ceiling material in the compartment at intervals of about 2 m in length and width. After the respective holding surfaces are joined to the ceiling material in the compartment via a tough adhesive, the respective one end and the other end are drawn into the ceiling pocket through the slit. Thus, by fixing each to the frame side structural material, the entire ceiling can be stably supported as a unit.

  Moreover, the high ductility material is flat and is formed of a tape-shaped woven fabric whose rigidity other than tension is negligibly smaller than the rigidity of the support target member, so that it can be seen on the lower surface side of the ceiling material in the compartment. Even if it is not conspicuous, it can be made almost unnoticeable by further painting, so that the appearance on the lower surface side of the ceiling material in the compartment is not impaired even after construction. In addition, design problems such as a fall prevention net are unlikely to occur.

  According to the third aspect of the present invention, the ceiling-side non-structural material includes ceiling-side installation equipment such as an illumination lamp and a ventilation fan attached to the ceiling material in the compartment. By supporting with the high ductility material integrally with the intra-compartment ceiling material side, it is possible to reliably prevent the ceiling-side installation tool side from separating from the intra-compartment ceiling material side and collapsing.

  According to the fourth aspect of the present invention, the high ductility material is installed with a twist between the fixing portion and the slit, and the fixing portion is provided on the side surface of the housing-side structural material. It becomes a plane that is almost parallel to the tension (vertical force) generated in the high ductility material trying to collapse, and the resistance acts as a shearing force on the tough adhesive or bolt that forms the fixing part. Therefore, a stable effect can be exhibited in the fixing mechanism formed by the fixing unit.

  According to the invention described in claim 5, since the non-structural material on the ceiling side is one or more ceiling installation devices in a predetermined partition region, at least two high ductility materials are provided for one ceiling installation device. Ceiling pocket installation equipment in the ceiling pocket by fixing each one end side and the other end side separately to the housing side structural material in the ceiling pocket under the state of being held so as to be suspended. Can be supported individually and stably.

  According to the sixth aspect of the present invention, each of the ceiling-side non-structural materials that are the support target members using the method for preventing a collapse of the ceiling-side non-structural material according to any one of the first to fourth aspects is used. It is possible to stably support each of them and to prevent their collapse when an earthquake occurs. In addition, high ductility materials can be easily twisted and bent and drilled, so a simple mechanical fixing mechanism using screws etc. can be formed on the side of beams, slabs, etc. In addition, the problem that the effect is limited by the design and construction of the details of the fixing portion can be reduced. Furthermore, the weight of the high ductility material and the fixing portion is smaller than that of the hanging metal fittings and wires used in the conventional method, and the increase in the risk due to the increase in weight can be almost eliminated. Further, it is possible to almost eliminate the risk that the high ductility material and the fastening metal fitting used for the fixing portion may fall and cause harm to human life or damage the equipment.

  According to the seventh aspect of the present invention, each of the ceiling-side non-structural materials, which are the support target members, is used for the casing-side structure by using the method for preventing the collapse of the ceiling-side non-structural material according to any one of the first to fourth aspects. When the material is stably supported separately, the high ductility material located between the fixing part and the slit, or between the fixing part and the ceiling installation device should have a length of up to about 100 mm. Therefore, even when it is fixed or when it is shaken by a large earthquake, it will not damage the equipment such as pipes or existing hanging hardware.

The ceiling material and ceiling pockets are installed in the ceiling-side structural material when the ceiling-side non-structural material is supported by the high ductility material as the support target member in the specified compartment area in the ceiling material and ceiling pocket. The perspective view which abbreviate | omits one part and shows the example of the air conditioner indoor unit which is an instrument. It is explanatory drawing which shows the fixing state of the high ductility material which supports a ceiling side non-structural material based on correspondence with FIG. 1, (a) is an explanatory view in a front view direction, (b) is a plane An explanatory view in the viewing direction is shown respectively. In the present invention, details of a fixing portion when fixing a highly ductile material to a structural member such as an RC beam, a column, and a slab are shown, in which (a) is an explanatory diagram of the main part, and (b) The enlarged view of the part enclosed with the dashed-dotted line in (a) is each shown. In the present invention, when the structure is a steel structure, a detailed explanation of a fixing portion when fixing a highly ductile material to a rib portion such as a deck plate forming a lower surface of a slab is shown, of which (a) is Explanatory drawing of a principal part, (b) shows the enlarged view of the part enclosed with the dashed-dotted line in (a), respectively. The principal part detail figure which shows the arrangement | positioning relationship between the slit provided in the ceiling material in a division | segmentation in this invention, and a highly ductile material.

  The present invention is composed of a method for preventing the collapse of the ceiling-side non-structural material in the structure according to the first invention and the structure for preventing the collapse of the ceiling-side non-structural material in the structure according to the second invention. As shown in FIG. 1 and FIG. 2, in the predetermined partition region 3 on the ceiling side surrounded by the frame-side structural material 1 such as the RC beam (large beam, small beam) 1 a, slab 1 b, column 1 c, etc. The installed ceiling-side non-structural material 2 is a member to be supported, and each of the ceiling-side non-structural materials 2 is flat and has a tape-like woven fabric that has a flatness and a rigidity other than tension that is negligible than the rigidity of the support-target member. Each of the intermediate portions located in the ceiling pocket 6 with one end portion 13 side and the other end portion 14 side thereof being supported substantially uniformly by the support surfaces 12 of the plurality of high ductility materials 11 made of A casing located in the vicinity of each of the 15 with looseness It is carried out by causing the support to fixing through the fixing unit 41 to the structural member 1 with high toughness adhesive 2 and / or the fastening bracket 31 is formed separately. In addition, although the detail of the fixing metal fitting 31 is mentioned later, fundamental materials, such as a volt | bolt, a plate, and a post-construction anchor bolt, can be used suitably as needed fundamentally.

  In this case, the predetermined partition region 3 on the ceiling side is, for example, as shown in FIG. 2, the frame-side structural material 1 such as the RC beam (large beam, small beam) 1 a, slab 1 b, and column 1 c on the ceiling side. For example, a surface area of about 8 m × 8 m surrounded by a ceiling material (intra-compartment ceiling material 4 to be described later), and the ceiling-side non-structural material 2 located in the predetermined division area 3 is a member to be supported in the present invention. It becomes.

  Further, the ceiling-side non-structural material 2 in the present invention includes an intra-compartment ceiling member 4 such as a ceiling plate 4a and a sound absorbing plate 4b, and a lower surface side of the intra-compartment ceiling member 4 In addition to a ceiling-side installation device (not shown) such as a lighting device or a ventilation fan attached to the ceiling, the air conditioner indoor unit 8 or a duct or pipe (not shown) in the predetermined compartment 3 on the ceiling pocket 6 side An installed ceiling pocket device 7 is also included.

  The high ductility material 11 used in the present invention is an RC beam in which one end portion 13 side and the other end portion 14 side are concrete-fired in a state where the ceiling-side non-structural material 2 is supported through the support surface 12. (Large beam, small beam) It is arranged by being fixed to the frame-side structural member 1 made of 1a, slab 1b or the like.

The high ductility material 11 made of a tape-like woven fabric, which is flat and has a rigidity other than tension, which is negligibly smaller than the rigidity of the member to be supported, refers to a material in which polyester fibers are woven into a tape shape. Specific specifications are shown in Table 1 below. The types of high ductility material 11 include high ductility material A (product name “SRF100W90” of the applicant company) and high ductility material B (same product name “SRF200W100”) that have already been commercialized by the applicant. Depending on the specific situation of the construction site, it can be properly used.

Further, as the high toughness adhesive 21 used in the present invention, a urethane-based one-component, solventless, moisture-curing type adhesive having a large peeling limit displacement can be preferably used, and its specific specifications are as follows. As shown in Table 2 below. The types of high-toughness adhesive 21 are high-toughness adhesive A (product name “SRF20” of the applicant company) and high-toughness adhesive B (same product) that have already been commercialized by the applicant. Name "SRF30"), which is properly used according to the specific situation of the construction site.

  FIG. 3 is an explanatory view showing a detailed example of the fixing portion 41 when fixing the one end portion 13 and the other end portion 14 of the highly ductile material 11, taking as an example the case where the frame-side structural member 1 is an RC beam 1 a. The high toughness adhesive 21 used in each fixing portion 41 is the high toughness adhesive B in Table 2. Further, the fastening bracket 31 is composed of two SUS plates 32 having a width of about 90 mm and a thickness of about 1.0 mm and a single metal expansion anchor 33 having a standard number of M10, for example. It has been.

  Here, if the structural example of the fixing | fixed part 41 is demonstrated based on FIG. 3, the one end part 13 or the other end part 14 of the high ductility material 11 will be attached so that it may follow along the perpendicular | vertical surface of RC beam 1a.

  This will be described in detail by way of an example in which one end 13 of the high ductility material 11 is attached. As shown in FIG. 3A, it is directed upward in order to be fixed on the surface side of the RC beam 1a. The one end portion 13 of the high ductility material 11 arranged in this manner is folded over via the turn-back portion 16 with the tip portion 13a side facing downward to form a double stack of the forward path piece portion 17 and the return path piece portion 18. It is arranged on the surface side.

  And in two places between the forward path piece part 17 and the return path piece part 18 of the high ductility material 11 located on the surface of the RC beam 1a and on the return path piece part 18, it is shown in FIG. As shown, the SUS plates 32 each having one through-hole 32a are arranged in a positional relationship facing each other. At this time, the SUS plate 32 positioned between the forward path piece portion 17 and the return path piece portion 18 is respectively connected to the forward path piece portion 17 and the return path piece portion 18 via the high-toughness adhesive (high-toughness adhesive B) 21. It is joined to the inner side of the. Further, the outer surface side of the outward path piece 17 facing the surface of the RC beam 1a is also joined to the surface side of the RC beam 1a via a high-toughness adhesive (adhesive B) 21.

  Further, in this case, the fixing unit 41 is configured to connect one metal expansion anchor 33 to the through hole 32a of one SUS plate 32 → the return piece 18 of the high ductility material 11 → the through hole 32a of one SUS plate 32 → the forward piece. It is formed by being inserted in the order of the portion 17 and then driven into the surface side of the RC beam 1a. In the above example, the high-tough adhesive 21 is not necessarily used for the fixing portion 41.

  FIG. 4 shows an example in which the lower bottom portion of the slab 1b is a flat deck 35 when the beam 1a and the column 1c as the frame-side structural material 1 are fireproof coated and it is difficult to provide a fixing portion. It is explanatory drawing which shows the detailed example of the fixing | fixed part 41 at the time of fixing the one end part 13 or the other end part 14 of the ductility material 11, and as the tough adhesive 21 in each fixing part 41, the tough adhesive in Table 2 is shown. B is used. The fastening bracket 31 includes a set of two SUS plates 34 having a width of about 90 mm and a thickness of about 1.0 mm, a flat deck 35, two sets of bolts 38 and nuts 39, and one piece. The bolt 38 is composed of two washers 40 each prepared.

  Here, a structural example of the fixing portion 41 will be described with reference to FIG. 4A. The fixing portion 41 is bent so as to protrude downward in a substantially isosceles triangle shape to form a lower bottom portion of the slab 1b. One end 13 or the other end 14 of the high ductility material 11 is attached using one of the left slope 36a and the right slope 36b of the rib 36 provided in the flat deck 35 to be used, in the illustrated example, the right slope 36b. Note that two bolt holes 37 are formed in the row direction on the left inclined surface 36a and the right inclined surface 36b of the rib 36 in a row direction.

  Specifically, the case where the one end portion 13 of the highly ductile material 11 is attached will be described by way of example. As shown in FIG. 4B, the upper duct member 11 is arranged upward to be fixed on the flat deck 35 side. The one end portion 13 of the high ductility material 11 is folded to the lower side through the folded portion 16 so that the front end portion 13a side is overlapped so that the forward path piece portion 17 and the return path piece portion 18 are overlapped. It arrange | positions at the slope 36b side.

  In addition, two passages in the row direction are provided at two places between the forward piece 17 and the backward piece 18 of the highly ductile material 11 positioned on the right slope 36b of the rib 36, respectively. The SUS plates 34 provided with the holes 34a are arranged in a positional relationship facing each other. At this time, one SUS plate 34 positioned between the outward path piece 17 and the return path piece 18 is connected to the outward path piece 17 and the return path piece 18 via the high-toughness adhesive (high-toughness adhesive B) 21. It is joined to each inner surface side. Further, the outward path piece portion 17 at a position facing the right slope surface 36 a of the rib 36 is also joined to the right slope surface 36 b side of the support piece portion 36 via the high toughness adhesive agent (high toughness adhesive B) 21.

  In this case, the fixing unit 41 has a single washer 40 interposed between the bolts 38, the through hole 34 a of one SUS plate 34 → the return piece 18 of the high ductility material 11 → the other SUS. The through hole 34a of the plate 34 → the forward passage piece 17 → the bolt hole 37 of the right inclined surface 36b of the rib 36 → the bolt hole 37 of the left inclined surface 36a are passed through in this order, and a nut is provided with a single washer 40 interposed therebetween. It is formed by tightening 39.

  Next, a lightweight intra-compartment ceiling in which the ceiling-side non-structural material 2 as a support target member supported by fixing the high ductility material 11 through the fixing unit 41 described above is located in the predetermined compartment area 3. Taking the case of the material 4 as an example, the first invention will be described based on FIG.

  That is, as shown in FIG. 2 (b), two or more are prepared at intervals of about 2 m in length and breadth with respect to the ceiling material 4 in the compartment, and in the example shown in FIG. As shown in FIG. 2A, the high ductility material 11 is formed by joining each of the holding surfaces 12 facing the lower surface side of the intra-compartment ceiling material 4 to the lower surface via a high-toughness adhesive 21. In such a state, they are arranged substantially orthogonally so as to enable stable support in the vertical and horizontal directions.

  Further, the one end 13 and the other end 14 of each highly ductile material 11 are connected to each other through slits 5a provided in the respective peripheral edge portions 5 of the in-compartment ceiling material 4 in the corresponding positional relationship. Pull into 7. In addition, the code | symbol 56 in FIG.2 (b) shows the inspection port for a periodic inspection.

  FIG. 5 is an explanatory diagram showing in detail the positional relationship between the slits 5 a provided in the peripheral edge 5 of the intra-compartment ceiling material 4 and the highly ductile material 11. According to the figure, the in-compartment ceiling material 4 constituted by the ceiling plate 4a and the sound absorbing plate 4b arranged integrally on the lower surface thereof is supported via the field edge material 51. Further, the field edge material 51 is connected to a field edge material receiver 53 in the ceiling pocket 7 via a channel clip 52, and the field edge material receiver 53 is connected to, for example, the slab 1b side via a hanging metal fitting 54. It is supported.

  Further, the ceiling material 4 in the compartment is formed with slits 5a at appropriate positions on the peripheral edge portion 5 specified by the number of the high ductility materials used and the positions thereof, as shown in FIG. 1, FIG. 2, and FIG. As shown, the one end 13 and the other end 14 of each highly ductile material can be drawn into the ceiling pocket 6 through these slits 5a.

  The one end portion 13 and the other end portion 14 of the high ductility material 11 drawn into the ceiling pocket 6 are located in the vicinity under the condition that each midway portion 15 is loosened. By forming and fixing the fixing portion 41 already described separately in 1, the in-compartment ceiling material 4 is supported in a state of being supported separately from the lower surface side through the respective holding surfaces 12. Become. In this case, it is preferable that the degree of looseness in the midway portion 15 of the highly ductile material 11 is about 100 m between the fixing portion 41 and the slit 5a at one location. Moreover, each slit 5a after drawing the one end part 13 and the other end part 14 of the high ductility material 11 separately to the ceiling pocket 6 side is filled with an appropriate filler 55 such as a putty.

  Furthermore, the case where the ceiling-side non-structural material 2 supported by fixing the high ductility material 11 through the fixing unit 41 is an air conditioner indoor unit 8 that is one of the ceiling installation devices 7 in the predetermined partition region 3. The first invention will be described as an example.

  That is, the air conditioner indoor unit 8 as the ceiling pocket installation instrument 7 is of the ceiling cassette type as shown in FIGS. 1 and 2, and has four corners on the ceiling pocket 6 side, for example, on the slab 1b side. It is suspended via a suspension base 9. In this case, the two high ductility members 11 are formed by winding or connecting the corresponding parts separately to the gripping fittings 10 such as handles provided at at least two positions 9a of the side surface 9a of the suspension base 9. The air conditioner indoor unit 8 can be suspended by being interposed 19.

  The one end portion 13 side and the other end portion 14 side of the high ductility material 11 are fixed separately by forming the already-described fixing portion 41 to the housing-side structural material 1 in the ceiling pocket 7. Thus, the air conditioner indoor unit 8 as the ceiling pocket installation device 7 is suspended by the holding portions 19 that are formed on the opposite sides 9 a side of the suspension base portion 9 and facing each other. It will be held in this way. In this case, it is preferable that the degree of looseness in the midway portion 15 of the highly ductile material 11 is about 100 m between the fixing portion 41 and the air-conditioning indoor unit 9 from the hanging portion 9 to one place.

  On the other hand, according to the second invention (collapse prevention structure), each of the ceiling-side non-structural materials 2 that are the support target members using any one of the above-described first inventions (collapse prevention method) It is characterized in that it is supported by 1 separately. In this case, the high ductility material 11 located in the middle part 15 between the fixing unit 41 and the slit 5a or between the fixing unit 41 and the ceiling pocket installation instrument 7 is loosened to a length of about 100 mm. It is desirable to install.

Next, a method for checking the safety of the present invention will be described. Hereinafter, each numerical value is a typical value in a general building such as an office, and should be changed according to the weight, size, and quantity of the ceiling-side non-structural material 2 such as the ceiling material 4 in each facility. And First, in terms of load conditions, general ceiling materials and the like have a total weight of about 20 kgf / m ² (= 200 N / m ² ). If the intra-compartment ceiling member 4 is located in the reinforcement range of 8 m × 8 m, the total weight W can be obtained by the following “Equation 1”.

Further, if the breaking of the high ductility material 11 is examined, the breaking tension Qu of the high ductility material A shown in Table 1 can be obtained from the following “Equation 2” per one.

Moreover, as shown in FIG. 1, the high ductility material 11 (the high ductility material A in Table 1) suspends the in-compartment ceiling material 4 located in the reinforcement range of 8 m × 8 m with six pieces. Even if only half of this works, the tension Q per piece is much lower than the breaking tension, as shown in the following “Equation 3”. Even if tension is generated in the material 11, the highly ductile material 11 does not break.

Further, the weight (W) of the ceiling cassette type air conditioner indoor unit 8 is around W = 40 kgf = 400 N. This is supported by two high ductility materials 11 as shown in FIG. 1 and FIG. Even if only half of them are effective, the tension Q per one is much lower than the breaking tension Qu as shown in the following “Equation 4”. Even if tension is generated, the high ductility material 11 does not break.

Next, considering the destruction of the fixing unit 41, as shown in FIG. 2B, the fixing unit 41 has twelve fixing units 41 with respect to the intra-compartment ceiling member 4 located in the reinforcing range of 8 m × 8 m. Four fixing portions 41 are provided for the suspension base portion 9 of the indoor unit 8 respectively. The strength of the fixing portion 41 is determined by the smaller one of the peeling limit strength Fe of the high ductility material 11 with respect to the high toughness adhesive 21 and the shear fracture Fs of the bolt 38. Among these, the peeling limit strength Fe of the high ductility material 11 with respect to the high-toughness adhesive 21 can be obtained by the following equation (5). However, w is the width of the high ductility material 11, Ef is the effective Young's modulus, and t is the thickness, which are described in Table 1. Gf is the interfacial peel energy of the high tough adhesive 21 and is listed in Table 2.

Further, bolts (e.g., M6SUS, one location per two used) shear strength Fs 38, the following "number multiplying the effective area (20.1 mm ²⁾ and the allowable stress (135N / mm ²⁾ 6 It can obtain | require by the type | formula.

Accordingly, the strength Fu of the fixing unit 41 can be obtained from the following equation (7).

In the example shown in FIG. 2B, there are twelve fixing portions 41, and even if only half of them are effective, the force F acting on one place is expressed by the following equation (8). As shown in FIG. 4, since the strength Fu of the fixing unit 41 is lower, the fixing unit 41 is not destroyed.

  Therefore, it was confirmed that the structure shown in FIG. 2 (b) has a strength that prevents collapse of the ceiling material 4 in the compartment and the air conditioner indoor unit 8 located in the reinforcing range of 8 m × 8 m.

  As described above, according to the first invention (collapse prevention method), the ceiling-side non-structural material 2 as the support target member installed in the predetermined partition region 3 on the ceiling side has a plurality of high heights. Each end portion 13 side and the other end portion 14 side are loosened to the respective midway portions 15 located in the ceiling pocket 7 under the condition that they are supported substantially uniformly via the holding surface 12 of the ductile material 11. Since it can be separately fixed and stably supported on the structural member 1 located in the vicinity while holding the material, the collapse is surely prevented in the event of an earthquake, which greatly contributes to the reduction of earthquake disasters. Further, since the high ductility material 11 is fixed with moderate looseness, equipment such as piping and existing ceiling fittings such as existing hanging fittings can be used even during the fixing work or when it is shaken by a large earthquake or the like. 7 is not damaged.

  Further, according to the installation method of the present invention, the high ductility material 11 in the vicinity of the fixing portion 41 is substantially oriented in the vertical direction, and receives the load of the object to be collapsed as a tension. On the other hand, the fixing part of the conventional collapse prevention net often attempts to prevent the fall by the vertical component of the cable tension stretched almost horizontally, and the tension is much larger than the weight of the object to collapse. Non-patent document 2 also points out the danger of receiving this. In addition, the suspension bolts and the like are the same as the present invention in that they are installed in the vertical direction, but the suspension bolts themselves are bent and have shear rigidity, and when the ceiling material or the like is displaced from side to side due to shaking due to an earthquake, There is a possibility that various loads may directly act on the attachment site and the fixing portion to be broken. The present invention avoids these problems by using a structure in which a ceiling material or the like is hung with a high ductility material 11 that is loose and has almost no rigidity other than tension installed in a substantially vertical direction.

  Moreover, since the high ductility material 11 is flat and is formed of a tape-shaped woven fabric having rigidity other than tension that is negligibly smaller than the rigidity of the ceiling-side non-structural material 2 that is a support target member, the high ductility material 11 is bent or twisted. Can easily dodge existing facilities in the ceiling pocket 6 and existing suspension fittings 54, etc., so construction can be done quickly without damaging these existing facilities and existing suspension tools. can do. In addition, the fixing place and construction method can be selected flexibly and appropriately in response to the local situation, so that construction is not impossible. Further, the fixing of the one end portion 13 and the other end portion 14 of the high ductility material 11 to the housing-side structural material 1 side is ensured by the fixing portion 41 formed using the high-toughness adhesive 21 and the fastening bracket 31. Can be done. Furthermore, the construction can be carried out by simple manual work by determining the arrangement and specifications of the high ductility material 11 and the fixing portion 41 based on a preliminary investigation.

  Further, in the first invention, when the ceiling-side non-structural material 2 is a lightweight intra-compartment ceiling material 4, the high ductility material 11 is approximately orthogonal to the lower surface side of the intra-compartment ceiling material 4 in each of three vertical and horizontal parts. After each holding surface 12 is joined to the intra-compartment ceiling material 4 side through the high-toughness adhesive 21, the one end 13 and the other end 14 are connected to the ceiling 6 through the slit 5a. By pulling it in and fixing it individually to the frame-side structural material 1, the entire compartment ceiling material 4 can be supported stably as a unit.

  Moreover, since the high ductility material 11 is flat and is formed of a tape-like woven fabric whose rigidity other than tension is negligibly smaller than the rigidity of the ceiling-side non-structural material 2 that is the member to be supported, the ceiling material 4 in the compartment Even if it is installed so that it can be seen on the lower surface side, it is not noticeable, and it can be made almost unnoticeable by painting, so the lower surface side of the ceiling material 4 in the compartment even after construction There is no loss of aesthetics.

  Further, when the high ductility material 11 is installed with a twist between the fixing portion 41 and the slit 5a and the fixing portion 41 is provided on the side surface 1d of the housing-side structural material 1, a ceiling material or the like is used. The surface becomes substantially parallel to the tension (vertical force) generated in the high ductility material 11 in an attempt to collapse, and the resistance force becomes a shearing force against the high tough adhesive 21 or the bolt 38 constituting the fixing portion 41. Therefore, the fixing mechanism formed by the fixing unit 41 can exhibit a stable effect.

  In addition, when the ceiling-side non-structural material 2 includes a ceiling-side installation device (not shown) such as an illuminating lamp or a ventilation fan attached to the intra-compartment ceiling material 4 side in the first invention, the ceiling side By supporting the installation tool with the high ductility material 11 integrally with the intra-compartment ceiling material 4 side, it is possible to reliably prevent the ceiling-side installation equipment side from separating from the intra-compartment ceiling material 4 side and collapsing.

  Furthermore, when the ceiling-side non-structural material 2 is one or more ceiling pocket installation devices 7 in the predetermined partition region 3, the high ductility material 11 is suspended from at least two ceiling pocket installation devices 7. In this state, the one end 13 side and the other end 14 side are fixed separately to the housing-side structural member 1 in the ceiling pocket 6, so that the ceiling pocket in the ceiling pocket 6 is fixed. The installation tool 7 can be supported individually and stably.

  On the other hand, according to 2nd invention (collapse prevention structure), the ceiling side non-structural material which is a support object member using the collapse prevention method of the ceiling side non-structural material of the structure in any one of Claim 1 thru | or 4 Since each of 2 is supported by the frame-side structural material 1 separately, each of the ceiling-side non-structural materials 2 as the support target members is stably supported by the frame-side structural material 1 to generate an earthquake. Sometimes it can be reliably prevented from collapsing. Further, since the high ductility material 11 can be easily twisted and bent and drilled, a simple mechanical fixing mechanism using screws or the like can be formed on the side surfaces of the beams 1a and slabs 1b, etc. As described above, it is possible to reduce the problem that the effect is limited by the design and construction of the details of the fixing portion. Furthermore, the weights of the high ductility material 11 and the fixing portion 41 are smaller than those of the hanging metal fittings and wires used in the conventional method, and the increase in the risk due to the increase in weight can be almost eliminated. Further, it is possible to eliminate the danger that the fastening metal fitting 31 itself made of the bolts 38 and the plates used for the high ductility material 11 and the fixing portion 41 may fall and cause harm to human life or damage the equipment. In addition, at this time, a highly ductile material positioned between the fixing unit 41 and the slit 5a or between the fixing unit 41 and the ceiling installation device 7 is installed with a slack of up to about 100 mm. If there is, it will not damage the equipment such as piping and existing suspension fittings during the fixing work or when it is shaken by a large earthquake.

1 Frame side structural material 1a Beam (large beam, small beam)
DESCRIPTION OF SYMBOLS 1b Slab 1c Column 1d Side surface 2 Ceiling side non-structural material 3 Predetermined partition area 4 Ceiling material in the partition 4a Ceiling plate 4b Sound absorbing plate 5 Peripheral portion 5a Slit 6 Ceiling pocket 7 Ceiling pocket installation tool 8 Air conditioner indoor unit 9 Suspension base portion 9a Side surface DESCRIPTION OF SYMBOLS 10 Holding metal fitting 11 High ductility material 12 Holding surface 13 One end part 13a Tip part 14 Other end part 14a Tip part 15 Midway part 16 Folding part 17 Outward piece part 18 Return piece part 19 Holding part 21 High toughness adhesive 31 Fastening metal fitting 32 SUS plate 32a through hole 33 metal expansion anchor 34 SUS plate 34a through hole 36 flat deck 36 rib 36a left side slope 36b right side slope 37 bolt hole 38 bolt 39 nut 40 washer 41 fixing part 51 field edge material 52 channel clip 53 field edge material Receptor 54 Suspension bracket 55 Filler 56 Inspection port

Claims (7)

A ceiling-side non-structural material installed in a predetermined partition area on the ceiling side surrounded by a frame-side structural material such as a beam or a column is used as a support target member.
Each of the non-structural materials on the ceiling side is flat, and is substantially uniformly held by a plurality of highly ductile materials made of a tape-shaped woven fabric having rigidity other than tension that is negligibly smaller than the rigidity of the support target member. Originally, each of the one end side and the other end side is respectively provided with a high toughness adhesive and / or the above-mentioned structural body side member located in the vicinity while loosening each of the midway portions located in the ceiling pocket. Alternatively, a method for preventing a collapse of a ceiling-side non-structural material in a structure, which is supported by a fixing portion formed by fixing using a fastening metal fitting. The ceiling-side non-structural material is an in-compartment ceiling material located in the predetermined compartment area,
The high ductility material has two or more of each holding surface facing the lower surface side of the ceiling material in the compartment at intervals of about 2 m in length and breadth with respect to the ceiling material in the compartment through a high-tough adhesive. Arranged almost orthogonally so that it can be supported under the condition of being joined to the lower surface side.
The one end portion and the other end portion of the highly ductile material are respectively provided to the ceiling pocket through slits provided separately in the respective peripheral edge portions of the intra-compartment ceiling material in a corresponding positional relationship. The method for preventing a collapse of a ceiling-side non-structural material in a structure according to claim 1, wherein the ceiling-side ceiling material is supported by being pulled in and fixed separately to the housing-side structural material. The method according to claim 2, wherein the ceiling-side non-structural material includes a ceiling-side installation device such as an illuminating lamp or a ventilation fan attached to the ceiling material side in the compartment. The structure according to any one of claims 1 to 3, wherein the high ductility material is installed with a twist between the fixing portion and the slit, and the fixing portion is provided on a side surface of the housing-side structural material. For preventing collapse of non-structural material on the ceiling side. The ceiling-side non-structural material is one or more ceiling pocket installation instruments in the predetermined partition area,
The high ductility material is arranged such that at least two of the ceiling pocket installation devices can be held with respect to the ceiling pocket installation device,
The said one end part side and the said other end part side of each of the said high ductility material are each fixed to the said housing | casing side structural material within a ceiling pocket, and support the said ceiling pocket installation instrument. A method for preventing the collapse of non-structural materials on the ceiling side in structures. Each of the said ceiling side non-structural material which is the said support object member was made to support each separately in the said housing side structural material using the fall prevention method of the ceiling side non-structural material in any one of Claim 1 thru | or 5. A structure for preventing collapse of the non-structural material on the ceiling side in the structure characterized by the above. When each of the said ceiling side non-structural material which is the said support object member is made to support each separately by the said housing side structural material using the fall prevention method of the ceiling side non-structural material in any one of Claim 1 thru | or 5 The high ductility material positioned between the fixing unit and the slit or between the fixing unit and the ceiling pocket installation device is installed with a slack of up to about 100 mm. Structure for preventing collapse of non-structural material on the ceiling side in the described structure.

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