JP6468809B2 - Membrane ceiling structure and its construction method - Google Patents

Description

  The present invention relates to a membrane ceiling structure and a construction method thereof.

  As the membrane ceiling structure, there is one that locks the sheet material to the housing side using the stretchability of the sheet material (see, for example, Patent Documents 1 to 3). In addition, there is one in which a plurality of ceiling membrane material units formed by stretching a sheet material on a frame body are arranged (see, for example, Patent Document 4). Further, the sheet material is sandwiched and supported by the first and second sandwiching plates as one member (see, for example, Patent Document 5), and the sheet material is supported and fixed by the first member and the second member. There is a member that pushes up a sheet material with a member to bring the sheet material into close contact with the ceiling material (see, for example, Patent Document 6).

Japanese Patent Laid-Open No. 11-159051 JP 2014-101715 A JP-A-2-49838 Japanese Patent No. 4698060 JP 2007-224605 A JP 2006-89949 A

  If the stretchability of the sheet material is used as in Patent Documents 1 to 3, the sheet material may not be attached to the housing side favorably depending on the stretchability of the sheet material. Moreover, the thing using a ceiling membrane material unit like patent document 4 will manufacture a ceiling membrane material unit in a factory previously, and is not suitable for the construction on the spot. Further, in the case where the sheet material is sandwiched and supported by the first sandwiching plate and the second sandwiching plate as one member as in Patent Document 5, it is difficult to perform the construction satisfactorily while suppressing the occurrence of slack and wrinkles. In addition, there is a possibility that sufficient support rigidity cannot be obtained when the sheet material is supported simply by being sandwiched between two members as in Patent Document 6.

  An object of the present invention is to provide a membrane ceiling structure capable of satisfactorily constructing a sheet material on site without depending on its stretchability and obtaining a high support rigidity, and a construction method thereof.

In order to achieve the above object, the membrane ceiling structure of the present invention is a membrane ceiling structure that forms a ceiling surface by supporting a sheet material having low stretchability in a stretched state at a plurality of support portions, and the support portion However, the sheet material is sandwiched between a long base material in which a downward groove opening downward extends in the length direction and an upper surface inserted into the downward groove and a bottom surface of the downward groove. A long locking member, a fastening member that fastens the locking member to the downward groove, and a cover member that covers the downward groove, the locking member, and the fastening member and is attached to the base material If, have a, the locking member is a square tube shape, the underlying material, the a downward groove parallel side plate part and from each other to form a lower extension plate portion, of said lower extension plate portion A first engagement portion that is provided on the opposite side of the side plate portion, and the cover member includes the downward groove A cover plate portion that covers the locking member and the fastening member, characterized in that it comprises a second engagement portion which is retained in engagement with the first engagement portion.

  Thus, the support portion includes a bottom surface of the downward groove formed to extend in the length direction of the long base material, and an upper surface of the long locking member inserted into the downward groove. Thus, the sheet material is sandwiched, and the locking member is fastened to the downward groove with a fastening member to support the sheet material. Since the sheet material is sandwiched between the base material and the locking member, the sheet material can be supported without depending on its stretchability, and is suitable for construction on site. In addition, since the sheet material is sandwiched between the base material and the locking member, it is possible to perform the construction satisfactorily while suppressing the occurrence of slack and wrinkles. Further, the bottom surface of the downward groove of the base material and the upper surface of the locking member sandwich the sheet material from both sides, and in this state, the locking member is fastened to the downward groove by the fastening member, so that high support rigidity is achieved. can get.

  An upward groove that opens upward extends in the length direction of the locking member, and the upward groove is formed with a lower edge of a wall portion that forms the downward groove of the base material. The sheet material may be sandwiched.

  With this configuration, the sheet material is sandwiched between the upward groove of the locking member and the lower edge of the wall portion that forms the downward groove of the base material. Construction can be performed while further suppressing generation.

  The base material has a surrounding edge member that is fixed to the housing wall with one downward groove and an intermediate base member that is connected to the housing ceiling with two downward grooves. It is also good.

  If comprised in this way, the surrounding edge member which supports the housing | casing wall side of a sheet | seat material will have one downward groove, and an unnecessary downward groove will be lost. In addition, since the intermediate base member that supports the sheet material other than the housing wall side has two downward grooves, the two adjacent sheets can be supported by one intermediate base member. Therefore, both can reduce the cost.

  The intermediate base member is connected to the casing ceiling via suspension bolts, and the intermediate base member has diagonal connecting portions that extend obliquely upward and are connected to the casing ceiling on both sides in the width direction. It is good also as a structure currently provided.

  The intermediate base member can be easily shaken (vibrated) in the event of an earthquake or the like if it is connected to the cabinet ceiling via the suspension bolts. Since the slanted connecting portions are attached to both sides in the width direction, shake can be suppressed.

  The construction method of the membrane ceiling structure of the present invention is the construction method of the membrane ceiling structure, wherein one locking member is inserted into the downward groove of one base material so as to sandwich the sheet material therebetween. An insertion step, and the one locking member is fastened to the downward groove of the one base material by one fastening member, and the sheet material is formed by the bottom surface of the downward groove and the upper surface of the one locking member. One fastening step for clamping, a tension step for stretching the sheet material so as to exceed the lower side of the other base material, and pulling an end of the expansion side, and another locking member facing downward of the other base material Another insertion step of inserting into the groove, and fastening the other locking member to the downward groove of the other base material with another fastening member, and the bottom surface of the downward groove and the other locking member The other fastening step of sandwiching the sheet material with the upper surface, the downward groove of the one base material, the one locking member, and the one fastening member so as to cover the one fastening material One cover mounting step for attaching one cover member to the base material, and another cover material on the other base material so as to cover the downward groove of the other base material, the other locking member, and the other fastening member And another cover attaching step for attaching the cover member.

  Accordingly, the one locking member is inserted into the downward groove of the one base material so that the sheet material is sandwiched therebetween, and the one locking member is placed under the one base material by the one fastening member. The sheet material is clamped between the bottom surface of the downward groove and the top surface of the one locking member. Next, this sheet material is stretched so as to extend over the lower side of the other base material, the end of the stretch side is pulled, and another locking member is inserted into the downward groove of the other base material, The other locking member is fastened to the downward groove of the other base material by another fastening member, and the sheet material is sandwiched between the bottom surface of the downward groove and the upper surface of the other locking member. Then, one cover member is attached to the one base material, and another cover member is attached to the other base material. Except for the construction where the sheet material is stretched and attached to the base material attached to the frame wall, this construction allows the sheet material to stretch well between one base material and the other base material. be able to.

  The construction method of the membrane ceiling structure of the present invention is the construction method of the membrane ceiling structure, wherein one locking member is inserted into the downward groove of one base material so as to sandwich the sheet material therebetween. An insertion step, and the one locking member is fastened to the downward groove of the one base material by one fastening member, and the sheet material is formed by the bottom surface of the downward groove and the upper surface of the one locking member. One fastening step for clamping, a tension step for extending the sheet material toward the housing wall surface and pulling an end on the expansion side, and pressing the sheet material against the wall surface of the housing while holding the other locking member to another base material Another insertion step of inserting into the downward groove, and fastening the other locking member to the downward groove of the other base material with another fastening member to fix the bottom surface of the downward groove and the other locking Another fastening step of sandwiching the sheet material with the upper surface of the member, the downward groove of the one base material, the one locking member, and the one fastening portion A cover attaching step of attaching one cover member to the one base material so as to cover the lower base material, and a downward groove of the other base material, the other locking member, and the other fastening member so as to cover And another cover attaching step of attaching another cover member to another base material.

  Accordingly, the one locking member is inserted into the downward groove of the one base material so that the sheet material is sandwiched therebetween, and the one locking member is placed under the one base material by the one fastening member. The sheet material is clamped between the bottom surface of the downward groove and the top surface of the one locking member. Next, this sheet material is spread toward the wall surface of the casing and the end on the expansion side is pulled, and in this state, the other locking member is turned downwardly on the other base material while pressing the sheet material against the wall surface of the casing. The other locking member is inserted into the groove, the other fastening member is fastened to the downward groove of the other base material, and the bottom surface of the downward groove and the upper surface of the other locking member Hold the sheet material. Then, one cover member is attached to the one base material, and another cover member is attached to the other base material. For the construction in which the sheet material is stretched and attached to the base material attached to the frame wall, the sheet material should be stretched between one base material and the other base material in this way. Can do.

  According to the present invention, it is possible to satisfactorily construct the sheet material on site without depending on the stretchability, and high support rigidity can be obtained.

It is a top view of the membrane ceiling structure concerning one embodiment of the present invention. It is an enlarged view of the X section of FIG. It is an enlarged view of the Y section of FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a three-view figure of the frame wall fixture of the membrane ceiling structure which concerns on one Embodiment of this invention. It is CC sectional drawing of FIG. It is a three-view figure of the hanger of the membrane ceiling structure which concerns on one Embodiment of this invention. It is a side view which shows the connection state of the intermediate | middle base member by the extended connection metal fitting of the membrane ceiling structure which concerns on one Embodiment of this invention. It is a front view for demonstrating the construction method of the membrane ceiling structure which concerns on one Embodiment of this invention. It is a front view for demonstrating the construction method of the membrane ceiling structure which concerns on one Embodiment of this invention. It is a front view for demonstrating the construction method of the membrane ceiling structure which concerns on one Embodiment of this invention. It is a bottom view for demonstrating the construction method of the membrane ceiling structure which concerns on one Embodiment of this invention. It is sectional drawing which shows the modification of the membrane ceiling structure which concerns on one Embodiment of this invention. It is AA corresponding sectional drawing of FIG. 2 which shows another modification of the membrane ceiling structure which concerns on one Embodiment of this invention. It is CC sectional drawing corresponding to CC of FIG. 3 which shows another modification of the membrane ceiling structure which concerns on one Embodiment of this invention.

  A membrane ceiling structure and its construction method according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view of the membrane ceiling structure according to the present embodiment as viewed from the housing ceiling side. The membrane ceiling structure according to the present embodiment includes a base structure portion 1 and a plurality of sheet materials 2 supported by the base structure portion 1 in a stretched state. The sheet material 2 is a ceiling surface forming member that forms a ceiling surface in a room of a building. Here, a case where the membrane ceiling structure according to the present embodiment is applied to a rectangular parallelepiped room of a building will be described as an example.

  The ground structure portion 1 is attached to the housing wall W in the vicinity of the housing wall W as a whole and is arranged in a horizontal manner in parallel with the housing wall W to which it is attached. 1 to 4 in a straight line in which the wall side support portion 3 (support portion) shown and the end portion in the length direction are attached to the housing wall W and the intermediate portion is spaced apart from any housing wall W It has the intermediate support part 4 (support part) to show.

  As shown in FIG. 1, the wall side support portions 3 are provided on all the housing walls W. Here, since the chamber has a rectangular parallelepiped shape and has four housing walls W, the base structure portion 1 has four wall-side support portions 3, and these form a rectangular frame shape as a whole. It is connected continuously. In addition, the base structure portion 1 has a plurality of intermediate support portions 4 which are arranged in a parallel state or an orthogonal state to form a lattice shape as a whole. The foundation structure unit 1 includes a block target space 5 formed inside each of the four wall-side support units 3 and the plurality of intermediate support units 4 in an appropriate continuous combination. 5 is closed by one sheet material 2 at one place.

  As shown in FIG. 2, the base structure portion 1 includes a surrounding edge member 21 as a base material fixed to the casing wall W, a casing wall fixing bracket 22 fixed to the casing wall W, and a casing ceiling shown in FIG. 5. A suspension bolt 23 that is fixed to C and extends vertically downward, and a hanger 24 that is attached to the lower portion of the suspension bolt 23 are provided. Further, as shown in FIG. 2, the base structure portion 1 has an end portion in the length direction attached to the case wall fixing bracket 22 and fixed to the case wall W, and an intermediate portion in the length direction as shown in FIG. And an intermediate base member 25 as a base material that is attached to the hanger 24 and connected to the casing ceiling C shown in FIG. Further, as shown in FIG. 3, the base structure portion 1 includes a cross connection fitting 26 that connects a plurality of intermediate base members 25 in a cross shape, and an extended connection that connects the intermediate base members 25 so as to form the same straight line. A metal fitting 27 and an anti-vibration part 28 for anti-vibration of the intermediate base member 25 are provided. The surrounding edge member 21 shown in FIG. 2 constitutes the wall-side support portion 3, and the frame wall fixing bracket 22 and the intermediate base member 25 constitute the intermediate support portion 4.

  The peripheral edge member 21 is a long member, and is fixed in contact with a vertically extending housing wall W in a state of being horizontally disposed so as to be parallel thereto. As shown in FIG. 1, the surrounding edge member 21 is attached to each of the four side walls W and is continuously provided so as to form a rectangular frame shape as a whole. The peripheral edge member 21 is an extruded product made of, for example, an aluminum alloy.

  As shown in FIG. 4, the peripheral edge member 21 is a flat fixed plate portion that is arranged vertically and abuts against the housing wall W and is fixed to the housing wall W with bolts 42 inserted into the through holes 41 in this state. 43, a flat plate-like contact plate portion 44 that extends downward from the lower edge of the fixed plate portion 43 and contacts the housing wall W, and is thinner than the fixed plate portion 43, and the fixed plate portion 43 and the contact plate portion The plate-like laterally extending plate portion 45 that extends perpendicularly to the opposite side of the housing wall W from the boundary position between the fixed plate portion 43 and the fixed plate portion 43 from the upper edge of the fixed plate portion 43. And a flat upper end plate portion 46 extending in the opposite direction to the housing wall W. The side extension plate part 45 and the upper end plate part 46 are horizontally arranged. Here, after the bolt 42 is inserted into the through hole 41 of the fixing plate portion 43, the bolt 42 is screwed into an anchor (not shown) of the casing wall W to fix the fixing plate portion 43 to the casing wall W.

  Further, the peripheral edge member 21 is a flat side plate portion 51 that extends downward from an end edge portion of the side extending plate portion 45 opposite to the fixed plate portion 43 in parallel with the contact plate portion 44. A plate-like downwardly extending plate portion 52 that extends downward from a position between the abutting plate portion 44 and the side plate portion 51 of the laterally extending plate portion 45 in parallel with these, and a laterally extending portion. A plate-like connecting plate portion 53 that is parallel to the plate portion 45 and connects the abutting plate portion 44 and the downward extending plate portion 52 at an intermediate position in the vertical direction, and the abutting plate portion 44 and the downward extending portion of the connecting plate portion 53. And an engaging plate portion 54 extending downward from the position between the outlet plate portions 52 in parallel with them. The contact plate portion 44, the engagement plate portion 54, and the downward extending plate portion 52 have the same bottom end height, and the side plate portion 51 has the bottom end higher than this. . The lower end edge of the side plate portion 51 has a semicircular cross section in a plane orthogonal to the length direction. A plurality of engaging protrusions 55 are arranged in parallel on both surfaces of the engaging plate portion 54. The engaging ridges 55 are inclined so that the respective horizontal outer surfaces are positioned on the horizontal outer side as the upper side extends, and the upper surfaces thereof extend horizontally.

  The side plate portion 51, the downwardly extending plate portion 52, and the portion between the side extending plate portion 45 form a downward groove 56 that opens downward on the inside thereof. In other words, the side plate portion 51 and the downward extension plate portion 52 are wall portions that form the downward groove 56, and the side extension plate portion 45 is a bottom portion that forms the downward groove 56. The downward groove 56 extends in the length direction of the peripheral edge member 21 and is formed over the entire length of the peripheral edge member 21.

  The frame wall fixing bracket 22 is made of steel, contacts the frame wall W, is fixed to the frame wall W with bolts 62 inserted into the through holes 61, and the fixed plate portion 63 includes A flat side extending plate 64 extending perpendicularly to the fixed plate 63 from the lower edge and extending to the side opposite to the housing wall W, and the fixed plate 63 in the side extended plate 64. And a pair of connecting plate portions 65 shown in FIG. 6 that extend downward from the edges on the opposite sides in the width direction perpendicular to the laterally extending plate portion 64. The pair of connecting plate portions 65 are parallel to each other, and are arranged in parallel to a plane orthogonal to the fixed plate portion 63. One through hole 66 is formed in each of the pair of connecting plate portions 65.

  The housing wall fixing bracket 22 has a plurality of, specifically two, through holes 61 in which the fixing plate portion 63 is arranged in the width direction. The housing wall W shown in FIG. Are fixed to the housing wall W by two bolts 62 screwed to an anchor (not shown). The housing wall fixing bracket 22 is attached to the housing wall W in a state where the lower surface of the laterally extending plate portion 64 is in contact with the upper surface of the upper end plate portion 46 of the peripheral edge member 21. The direction extending plate portion 64 is disposed horizontally, and the pair of connecting plate portions 65 extend vertically downward.

  The suspension bolt 23 shown in FIG. 5 is made of steel, and its upper end is fixed to the casing ceiling C and extends vertically downward from the casing ceiling C. The hanger 24 is attached to the lower part of the suspension bolt 23 by a metal nut 71, a spring washer 72, a washer 73 and a nut 74.

  The hanger 24 is made of steel, has a through hole 81 through which the suspension bolt 23 is inserted, and has a flat plate-like substrate portion 82 sandwiched between a nut 71, a spring washer 72 and a washer 73, and a nut 74, and a substrate portion This is a U-shaped component having a pair of flat plate-like mounting plate portions 83 extending downward from both end edges of 82. As shown in FIG. 8, each of the pair of mounting plate portions 83 is formed with one through hole 84. As shown in FIG. 5, the board | substrate part 82 is arrange | positioned horizontally and a pair of attachment board part 83 is mutually parallel, and extends vertically.

  As shown in FIG. 1, the intermediate base member 25 is a long member, and in a state of being horizontally disposed, the intermediate base member 25 is perpendicular to the fixing body wall W via the body wall fixing bracket 22. Or is attached to the frame ceiling C shown in FIG. The intermediate base member 25 is an extruded product made of, for example, an aluminum alloy.

  The intermediate base member 25 is provided with a plurality of drill screws 91 shown in FIG. 4 inserted into the plurality of through holes 66 in a state of being sandwiched between the pair of connecting plate portions 65 of the case wall fixing metal fixture 22 shown in FIG. 7 or attached to the hanger 24 with a plurality of drill screws 92 shown in FIG. 3 sandwiched between a pair of attachment plate portions 83 of the hanger 24 shown in FIG. As shown in FIG. 3, the horizontal intermediate member 25 is disposed horizontally by being attached to another intermediate base member 25.

  The intermediate base member 25 includes a flat plate-like upper plate portion 101 that is horizontally disposed, and flat plate-like shapes that extend downward from both end edges in the width direction of the upper plate portion 101 in a direction perpendicular to the upper plate portion 101. A pair of parallel mounting plate portions 102 and a flat intermediate plate extending horizontally to the outside in the width direction than the pair of mounting plate portions 102 by connecting lower end edges of the pair of mounting plate portions 102 to each other. Part 103.

  Further, the intermediate base member 25 includes a pair of flat side plate portions 111 that extend downward from both end edges in the width direction of the intermediate plate portion 103 in parallel with the pair of mounting plate portions 102, and the intermediate plate portion 103. A pair of flat plate-like lower extending plate portions 112 extending downward in parallel with the pair of side plate portions 111 from an intermediate position in the width direction, and a pair of lower extending plates in parallel with the intermediate plate portion 103 The plate-like connecting plate portion 113 that connects the portions 112 at an intermediate position in the vertical direction, and the engaging plate that extends downward from the position between the pair of downwardly extending plate portions 112 in the connecting plate portion 113 in parallel therewith. Part 114.

  The pair of downward extending plate portions 112 and the engaging plate portion 114 are aligned at the lower end portion, and the pair of side plate portions 111 have the lower end portion positioned at the upper side. Each of the lower edge portions of the pair of side plate portions 111 has a semicircular cross section in a plane orthogonal to the length direction. A plurality of engaging protrusions 115 are arranged in parallel on both surfaces of the engaging plate portion 114. The plurality of engaging protrusions 115 are inclined so that the respective horizontal outer surfaces are positioned on the horizontal outer side as the upper side extends, and the upper surfaces extend horizontally.

  One side plate portion 111 and one lower extension plate portion 112 on the side closer thereto and an intermediate portion of the intermediate plate portion 103 form one downward groove 116 that opens downward inside. ing. In other words, one side plate portion 111 and one downward extending plate portion 112 are wall portions that form one downward groove 116, and the intermediate plate portion 103 is a bottom portion that forms one downward groove 116.

  Further, the other side plate portion 111 and the other lower extension plate portion 112 on the side close thereto and the intermediate portion of the intermediate plate portion 103 have the other downward groove 116 opened downwardly inside thereof. Forming. In other words, the other side plate portion 111 and the other downward extending plate portion 112 are wall portions forming the other downward groove 116, and the intermediate plate portion 103 is a bottom portion forming the other downward groove 116. These downward grooves 116 are parallel to each other and aligned at the same height, and both extend horizontally along the length direction of the intermediate base member 25 and are formed over the entire length of the intermediate base member 25. Has been.

  When the intermediate base member 25 is attached to the housing wall fixing bracket 22 shown in FIG. 6, the pair of mounting plate portions 102 of the intermediate base member 25 shown in FIG. However, as shown in FIG. 4, the pair of connecting plate portions 65 are brought into contact with the upper surface of the intermediate plate portion 103, and the lower surface of the laterally extending plate portion 64 is brought into contact with the upper surface of the upper plate portion 101, thereby The member 25 is positioned up and down. In this state, one drill screw 91 is inserted into the through hole 66 of one connecting plate portion 65 shown in FIG. 6, and then screwed into one mounting plate portion 102 shown in FIG. 4, and the other drill screw 91 is connected to the other connecting plate portion. The intermediate base member 25 is fixed to the housing wall fixing bracket 22 by being screwed into the other mounting plate portion 102 after being inserted into the through hole 66 of 65.

  Further, when the intermediate base member 25 is attached to the hanger 24 shown in FIG. 8, a pair of mounting plate portions 102 of the intermediate base member 25 shown in FIG. The intermediate plate member 25 is vertically positioned by bringing the mounting plate portion 83 into contact with the upper surface of the intermediate plate portion 103. In this state, one drill screw 92 shown in FIG. 3 is inserted into the through hole 84 of one mounting plate portion 83 shown in FIG. 8, and then screwed into one mounting plate portion 102 shown in FIG. The intermediate base member 25 is fixed to the hanger 24 by being screwed into the other mounting plate portion 102 after being inserted into the through hole 84 of the mounting plate portion 83. In this way, the intermediate base member 25 is connected to the frame ceiling C via the suspension bolts 23 and the hangers 24 shown in FIG.

  3 and 7 is made of steel and is an L-shaped component having a pair of flat plate-like connecting plate portions 121 that are perpendicular to each other. Each of the pair of connecting plate portions 121 is formed with a plurality of, specifically, two through holes 122 arranged in the length direction.

  As shown in FIG. 7, when one intermediate base member 25 is connected so as to be orthogonal to the other intermediate base member 25, one connecting plate portion 121 of one cross-shaped connecting bracket 26 is connected to one intermediate base member. 25 is brought into contact with the outer surface of one mounting plate portion 102 and the upper surface of the intermediate plate portion 103. In this state, the two drill screws 123 are respectively inserted into the through holes 122 of the one connecting plate portion 121 and then screwed into the one mounting plate portion 102. As a result, as shown in FIG. 7, one cross connection fitting 26 is fixed to one intermediate base member 25.

  In addition, the other connecting plate portion 121 of the one cross portion connecting fitting 26 is brought into contact with the outer surface of one mounting plate portion 102 of the other intermediate base member 25 and the upper surface of the intermediate plate portion 103. In this state, the two drill screws 123 are respectively inserted into the through holes 122 of the other connecting plate portion 121 and then screwed into the one mounting plate portion 102. As a result, the one cross-section connecting bracket 26 is fixed to the other intermediate base member 25. By repeating such a connection with the cross-connecting brackets 26 for the four cross-connecting brackets 26, two intermediate base members 25 are provided on both sides of one intermediate base member 25 as shown in FIG. As a whole, they are connected so as to form a cross shape, thereby forming a cross-shaped connecting portion 125.

  A plurality of such cross-shaped connecting portions 125 are formed, and the plurality of intermediate base members 25, that is, the plurality of intermediate support portions 4 are connected to form a lattice shape as a whole. The plurality of intermediate support portions 4 are suspended from the suspension bolts 23 via the hangers 24 at the positions of all the cross-shaped connection portions 125. At this time, the hanger 24 is fixed to the pair of mounting plate portions 102 of the one intermediate base member 25 penetrating the cross-shaped connecting portion 125 in a state of being disposed between the four cross-shaped connecting fittings 26.

  Here, depending on the length of the intermediate support portion 4, it is necessary to connect one intermediate base member 25 to the other intermediate base member 25 on its extension. In this case, as shown in FIG. They are connected using the extended connection fitting 27.

  As shown in FIG. 1, the surrounding edge member 21 constituting the wall-side support portion 3 is installed so as to form a rectangular frame as a whole, and the intermediate base member 25 constituting the intermediate support portion 4 includes the frame wall fixing bracket 22 and the hanger. 24, the suspension bolt 23, the cross connection fitting 26 and the extension connection fitting 27 are appropriately used, so that the base structure portion 1 is constructed by being installed in a lattice shape as a whole. In the base structure portion 1, a lattice-like portion constituted by a plurality of intermediate base members 25 is fixed to all four casing walls W via the casing wall fixing bracket 22.

  As shown in FIG. 5, the bracing part 28 has four L-shaped fixtures 141 attached to the intermediate base member 25 or attached to the casing ceiling C, and two wires 142.

  The L-shaped fixture 141 is made of steel and is an L-shaped component having a flat plate portion 143 and a flat plate portion 144 longer than the plate portion 143 that are perpendicular to each other. A plurality of specifically through holes 145 are formed in the short side plate portion 143, and a plurality of specifically through holes 146 are formed in the plate portion 144. The three through holes 145 are arranged on the same straight line parallel to the plate portion 144. The five through-holes 146 are formed on two straight lines parallel to the plate portion 143, with the positions in the linear direction being aligned with each other, and one place is formed at an equal distance from these. ing.

  Each of the wires 142 includes a linear wire main body 147 and two caulking members 148 that fold the ends of the wire main body 147 and fix them in a loop shape.

  One L-shaped metal fitting 141 is attached to the outside of one mounting plate 102 on one side in the width direction of the intermediate base member 25 to be reinforced. The L-shaped fixture 141 has a plurality of drill screws 151 in the through holes 145 in a state where the plate portion 143 is in contact with one mounting plate portion 102 and the plate portion 144 is in contact with the upper surface of the intermediate plate portion 103. It is inserted and screwed into one mounting plate portion 102. As a result, one L-shaped fixture 141 is attached to one mounting plate portion 102 of the intermediate base member 25. Another L-shaped metal fitting 141 is attached symmetrically to the other mounting plate 102 on the other side in the width direction of the intermediate base member 25 to be reinforced in the same manner as the one L-shaped metal fitting 141. In this way, the pair of L-shaped fixtures 141 are attached to both sides of the intermediate base member 25, that is, the intermediate support portion 4 in the width direction.

  Further, another L-shaped fixture 141 is attached to a position away from the intermediate base member 25 of the casing ceiling C on one side in the width direction of the intermediate base member 25 to be reinforced. At this time, the plate portion 143 is arranged on the side farther in the horizontal direction from the intermediate base member 25 than the plate portion 144. In this state, after the plurality of bolts 152 are respectively inserted into the through holes 146, the L-shaped fixtures 141 are attached to the casing ceiling C by being screwed into anchors (not shown) of the casing ceiling C. Further, another L-shaped fixture 141 is attached symmetrically in the same manner as described above at a position away from the intermediate base member 25 of the frame ceiling C on the other side in the width direction of the intermediate base member 25 to be reinforced. Yes.

  Then, the through hole 146 of the L-shaped fixing bracket 141 attached to the intermediate base member 25 on one side in the width direction of the intermediate base member 25 and the casing ceiling C are similarly attached on one side in the width direction of the intermediate base member 25. Further, the wire 142 is inserted into the through hole 145 of the L-shaped fixing metal 141 and is laid in a tension state in which one wire 142 generates tension. At this time, the wire 142 is inserted through the central through hole 146 of the plurality of through holes 146 and the central through hole 145 of the plurality of through holes 145. The two L-shaped fixtures 141, the wires 142, the plurality of drill screws 151, and the plurality of bolts 152, which are all on one side in the width direction of the intermediate base member 25, are diagonally inclined from the intermediate base member 25 to be reinforced to one side in the width direction. One oblique connection portion 155 that extends upward and is connected to the frame ceiling C is formed.

  In addition, the other oblique connection portion 155 that extends obliquely upward from the intermediate base member 25 to the other side in the width direction and is connected to the frame ceiling C is provided symmetrically in the same manner as the one oblique connection portion 155. Yes. The oblique connection portion 155 includes two L-shaped fixing fittings 141, wires 142, a plurality of drill screws 151, and a plurality of bolts 152, all on the other side in the width direction of the intermediate base member 25.

  As a result, the pair of oblique coupling portions 155 and 155 constituting the bracing portion 28 are attached to both sides in the width direction of the intermediate base member 25, that is, the intermediate support portion 4, and the intermediate base member 25, that is, the intermediate support portion 4 It extends obliquely upward so as to be located on the upper side on both sides in the width direction and is directly connected to the frame ceiling C without the suspension bolts 23. Each of the pair of oblique connecting portions 155 and 155 raises the intermediate base member 25, that is, the intermediate support portion 4 to both sides in the width direction while generating tension.

  The bracing portion 28 composed of a pair of diagonally connected portions 155 suppresses the deflection in the width direction of the intermediate base member 25, that is, the intermediate support portion 4 to which the bracing portion is attached. It is attached point by point (for example, two points). Therefore, the bracing portion 28 including the pair of oblique connection portions 155 is provided for both the plurality of orthogonal intermediate base members 25, that is, the intermediate support portions 4. Therefore, the plurality of bracing portions 28 suppress two-way wobbling (swaying) whose directions are different by 90 degrees in the horizontal direction of the base structure portion 1.

  As shown in FIG. 4, the base structure portion 1 holds the sheet material 2 with the surrounding edge member 21, or holds the sheet material 2 with the intermediate base member 25 as shown in FIG. 7. A member 160 and a drill screw 161 which is a fastening member for fastening the locking member 160 to the peripheral member 21 or the intermediate base member 25 are provided.

  The locking member 160 is an extruded product made of, for example, an aluminum alloy, and is inserted into the downward groove 56 of the peripheral edge member 21 or the downward groove 116 of the intermediate base member 25 with a rectangular cylinder having a rectangular cross section. It has a main body part 162 and an extension part 163 that extends from one corner edge of the lower part of the main body part 162.

  A through hole 164 that penetrates from the upper surface 162 a to the lower surface 162 b is formed in the main body 162. A plurality of through holes 164 are formed at a predetermined equal pitch in the length direction of the main body 162. The extending portion 163 includes a flat plate-like lower extending plate portion 165 that extends downward from one corner edge portion of the lower portion of the main portion 162, and a lower surface of the main portion 162 from the lower end edge portion of the lower extending plate portion 165. A flat plate-like laterally extending plate portion 166 extending in a direction away from the main portion 162 along the direction 162b, and an upper edge from an edge portion on the opposite side of the downwardly extending plate portion 165 of the laterally extending plate portion 166. And an upward extending plate portion 167 having a curved plate shape that extends away from the main portion 162 toward the upper side. The downward extending plate portion 165, the lateral extending plate portion 166, and the upward extending plate portion 167 constituting the extending portion 163 form an upward groove 168 that opens upward inside thereof. The upward groove 168 extends in the length direction of the locking member 160 at one side in the width direction of the locking member 160, and is formed over the entire length of the locking member 160.

  As shown in FIG. 4, the locking member 160 is inserted into the downward groove 56 of the peripheral edge member 21, and the upper surface 162 a of the main body 162 that is also the upper surface of the locking member 160 is the bottom surface 56 a of the downward groove 56. The sheet material 2 is clamped over the entire length of the locking member 160. Further, in this state, the locking member 160 holds the sheet material 2 over the entire length of the locking member 160 by the upward groove 168 of the extending portion 163 and the lower edge of the side plate portion 51 of the edge member 21. In this state, the plurality of drill screws 161 are respectively inserted into the washers 169 and the through holes 164 of the main body 162, and then screwed into the side extending plate portions 45 constituting the bottom of the downward groove 56 of the peripheral edge member 21. The locking member 160 is fixed to the peripheral edge member 21. The peripheral edge member 21 has only one downward groove 56 that sandwiches the sheet material 2 with the locking member 160 inserted in this way. When the plurality of drill screws 161 are screwed into the peripheral edge member 21, the plurality of drill screws 161 penetrate the sheet material 2 and lock the sheet material 2.

  Further, as shown in FIG. 7, the locking member 160 is inserted into one of the two downward grooves 116 of the intermediate base member 25, and the upper surface 162 a of the main portion 162 is formed in the downward groove 116. The sheet material 2 is clamped over the entire length of the locking member 160 with the bottom surface 116a. In this state, the locking member 160 clamps the sheet material 2 over the entire length of the locking member 160 between the downward groove 116 of the intermediate base member 25 and the lower edge of the side plate portion 111 on the same side in the width direction. To do. In this state, the plurality of drill screws 161 are respectively inserted into the washers 169 and the through holes 164 of the main body 162, and then screwed into the intermediate plate portion 103 that forms the bottom of the downward groove 116 of the locking member 160. Is fixed to the intermediate base member 25. Further, the other locking member 160 is fixed symmetrically in one of the two downward grooves 116 of the intermediate base member 25 in the same manner as one side. The intermediate base member 25 has two downward grooves 116 that sandwich the sheet material 2 with the inserted locking member 160. When the plurality of drill screws 161 are screwed into the intermediate base member 25, the plurality of drill screws 161 penetrate the sheet material 2 and lock the sheet material 2.

  The membrane ceiling structure according to the present embodiment includes a cover member 181 attached to the peripheral edge member 21 as shown in FIG. The cover member 181 includes a downward groove 56 of the peripheral edge member 21, a locking member 160 inserted in the downward groove 56, a plurality of drill screws 161 and a plurality of drill screws 161 fixing the locking member 160 to the peripheral edge member 21. The washer 169 is covered and attached to the peripheral member 21.

  The cover member 181 is, for example, an extruded product made of synthetic resin, and has a long shape in the extrusion direction. The cover member 181 is inserted into a gap between the contact plate portion 44 and the engagement plate portion 54 of the peripheral edge member 21 and between the downward extension plate portion 52 and the engagement plate portion 54. And a cover plate portion 192 arranged horizontally by connecting the lower end edges of the pair of insertion plate portions 191. The cover plate portion 192 covers the entire surrounding edge member 21 on the lower side, and one end side in the width direction covers the contact plate portion 44 of the turning edge member 21, and the other end side from the intermediate portion in the width direction. The downward groove 56, the locking member 160 inserted into the downward groove 56, and the plurality of drill screws 161 and washers 169 that fix the locking member 160 to the peripheral member 21 are covered.

  The cover member 181 has an upper extension plate portion 193 that extends upward from the other end edge in the width direction of the cover plate portion 192. A plurality of engaging protrusions 194 are arranged in parallel on the pair of insertion plate portions 191 on the mutually opposing sides. The engaging ridges 194 are inclined so that the surfaces on the adjacent sides are closer to each other on the lower side, and the lower surfaces extend horizontally.

  In such a cover member 181, the pair of insertion plate portions 191 are arranged around the contact plate portion 44 and the engagement plate portion 54 of the edge member 21 and between the downward extension plate portion 52 and the engagement plate portion 54. When inserted into the gap, the plurality of engagement protrusions 194 of the two insertion plate portions 191 are engaged with the plurality of engagement protrusions 55 on both surfaces of the engagement plate portion 54 to be prevented from coming off. Here, as shown in FIG. 4, when the lower surface of the uppermost engaging ridge 194 contacts the upper surface of the uppermost engaging ridge 55, the cover member 181 is located at the uppermost position with respect to the surrounding edge member 21. It is in a state where it is locked so as not to descend. In this state, the upper end position of the upper extension plate portion 193 of the cover member 181 is higher than the upper end position of the upper extension plate portion 167 of the locking member 160 that sandwiches the sheet material 2 with the edge member 21. And lift the sheet material 2.

  The cover member 181 is attached to all the surrounding edge members 21 so as to cover each of them at the lower side. At that time, the cover plate portions 192 of all the cover members 181 are arranged on the same plane with the height positions aligned, and the upper extending plate portions 193 of all the cover members 181 align the height positions of the upper edge portions. Moreover, the cover members 181 that intersect each other are cut and abutted at 45 degrees so that the cover plate portions 192 abut against each other without a gap and the upper extension plate portions 193 abut against each other without a gap.

  The sheet material 2 is supported by the peripheral edge member 21, the locking member 160 inserted into the downward groove 56, and a plurality of drill screws 161 and washers 169 that fix the locking member 160 to the peripheral edge member 21. At the same time, a linear wall-side support portion 3 is formed which is attached to the housing wall W in the entire length direction and is arranged horizontally in parallel with the housing wall W of the attachment destination. A cover member 181 is attached. Here, according to the horizontal direction length of the housing wall W to which the wall-side support portion 3 is attached, the peripheral edge member 21, the cover member 181 and the locking member 160 are cut or a plurality of them are connected. Then the length is adjusted.

  Further, the membrane ceiling structure according to the present embodiment has a cover member 182 attached to the intermediate base member 25 as shown in FIG. The cover member 182 fixes the two downward grooves 116 of the intermediate base member 25, the locking members 160 inserted into the downward grooves 116, and the locking members 160 to the intermediate base member 25. The drill screw 161 and the washer 169 are covered and attached to the intermediate base member 25.

  The cover member 182 is, for example, an extruded product made of synthetic resin, and has a long shape in the extrusion direction. The cover member 182 includes a pair of insertion plate portions 201 that are inserted into both gaps between the pair of downward extending plate portions 112 and the engagement plate portion 114 of the intermediate base member 25, and a lower edge of the pair of insertion plate portions 201. And a cover plate part 202 arranged horizontally. The cover plate portion 202 covers the entire intermediate base member 25 below.

  The cover member 182 has a pair of upwardly extending plate portions 203 that extend upward from edge portions on both sides in the width direction of the cover plate portion 202. A plurality of engaging protrusions 204 are arranged in parallel in the pair of insertion plate portions 201 on the mutually opposing sides. The engaging ridges 204 are inclined so that the surfaces on the adjacent sides are closer to each other on the lower side, and the lower surfaces extend horizontally.

  Such a cover member 182 is inserted in two places when the pair of insertion plate portions 201 are inserted into both gaps between the pair of downward extending plate portions 112 and the engagement plate portion 114 of the intermediate base member 25. The plurality of engaging ridges 204 of the plate portion 201 are engaged with the plurality of engaging ridges 115 on both surfaces of the engaging plate portion 114 to be prevented from coming off. Here, as shown in FIG. 7, when the lower surface of the uppermost engaging ridge 204 abuts the upper surface of the uppermost engaging ridge 115, the cover member 182 is located at the uppermost position with respect to the intermediate base member 25. It is in a state where it is locked so as not to descend. In this state, the upper end position of the upper extension plate portion 203 on both sides of the cover member 182 is the upper end position of the upper extension plate portion 167 of the locking member 160 on both sides holding the sheet material 2 with the intermediate base member 25. The sheet material 2 is lifted by being positioned above the position.

  The cover member 182 is attached to all the intermediate base members 25 so as to cover each of the cover members 182 on the lower side. At that time, the cover plate portions 202 of all the cover members 182 and the cover plate portions 192 of all the cover members 181 are arranged in the same plane with the height positions aligned, and the upward extending plates of all the cover members 182 The portion 203 and the upper extending plate portion 193 of all the cover members 181 align the height positions of the upper edge portions. In addition, when the cover member 182 intersects with the cover member 181, the cover plate portion 202 contacts the cover plate portion 192 without any gap, and the upper extension plate portion 203 contacts the upper extension plate portion 193 without any gap. Are matched. Further, when the cover members 182 cross each other, the cover plate portions 202 abut against each other without a gap, and the upper extension plate portions 203 abut against each other without a gap.

  The cover members 181 and 182 together with the sheet material 2 constitute a finished ceiling surface 210 in the chamber R. The sheet material 2 is made of a flame retardant material. Specifically, the sheet material 2 is a glass cloth with low stretchability in which glass fibers are woven. The sheet material 2 may be made of a synthetic resin or other various materials such as cloth.

  The intermediate base member 25, the locking members 160 inserted into the pair of downward grooves 116, and a plurality of drill screws 161 and washers 169 that fix the locking members 160 to the intermediate base member 25, provide a sheet material. 2 is formed, and a linear intermediate support portion 4 is formed in which an end in the length direction is fixed to the housing wall W and an intermediate portion is connected to the housing ceiling C via a suspension bolt 23. A cover member 182 is attached to 4. The intermediate support portions 4 are arranged horizontally and perpendicular to the fixing body wall W, and a plurality of intermediate support portions 4 are connected in a parallel or orthogonal state to form a lattice shape. The intermediate base member 25, the cover member 181 and the locking member 160 are cut or a plurality of the intermediate base member 25, the cover member 181 and the locking member 160 are cut in accordance with the interval between the opposing casing walls W and the crossing state of the intermediate support portion 4 with the other intermediate support portion 4. The length is adjusted by being connected.

  Here, all the wall side support parts 3 and all the intermediate | middle support parts 4 match | combined the height position, and in other words, these are arrange | positioned on the same planar shape as a whole.

  The same number of sheet materials 2 as the number of the closure target spaces 5 are spread while the four peripheral portions are supported by the foundation structure portion 1 to close the corresponding closure target space 5, thereby providing the foundation structure portion 1. A plurality of sheet materials 2 are spread so as to cover the entire surface, and thereafter, cover members 181 and 182 are appropriately attached. Thereby, the lower surface of the cover plate portions 192 and 202 exposed to the chamber R of the cover members 181 and 182 and the outer surface of the upper extension plate portions 193 and 203, and the lower surface of the intermediate portion exposed to the chamber R of the sheet material 2 Thus, the ceiling surface 210 is formed. Note that all the sheet materials 2 are supported by the base structure portion 1 in a tension state that generates tension, and an intermediate portion that is exposed to the chamber R and forms the ceiling surface 210 is horizontally disposed.

  Next, a construction method when the sheet material 2 is spread on the base structure portion 1 will be described.

  The sheet material 2 has a long band shape with a constant width, and is wound in the length direction and collected as a roll. And the sheet | seat material 2 is pulled out from this roll, and is cut | disconnected and used for appropriate length. The two wall-side support portions 3 and the plurality of intermediate support portions 4 that are arranged in parallel in one horizontal direction in parallel with each other have an interval between adjacent ones corresponding to the width of the sheet material 2. The sheet material 2 is basically set at an interval that can be supported without being cut in the width direction. The arrangement direction of the two wall side support portions 3 and the plurality of intermediate support portions 4 is the sheet width direction, and the horizontal direction orthogonal to the sheet width direction, that is, the length direction of the sheet material 2 to be stretched is the sheet length. This will be described as a direction.

  Below, a pair of wall side support parts 3 extended in the sheet width direction, a plurality of intermediate support parts 4 extending in the sheet width direction therebetween, and the sheet width direction extending in the sheet length direction. An example in which the sheet material 2 is extended in a plurality of occlusion target spaces 5 disposed between two intermediate support portions 4 adjacent to each other will be described. These occlusion target spaces 5 are arranged in a line in the sheet length direction with the positions in the sheet width direction aligned. In this way, the construction on the blockage target space 5 arranged in a line in the sheet length direction is sequentially repeated in the sheet width direction. In the following description, the alphabets in parentheses indicate the same parts and the same parts, and are attached to distinguish them from other parts and different parts.

  A peripheral edge member 21 (A) (one base material) constituting the wall-side support portion 3 (A) that starts to be stretched in the sheet length direction and an intermediate support portion 4 (B) adjacent in parallel with the surrounding edge member 21 (A). The sheet material 2 (A) is cut out from the roll by a predetermined length longer than the interval with the intermediate base member 25 (B) (other base material). And the adhesion process which adhere | attaches the one end side of the length direction of the sheet | seat material 2 (A) on the upper surface 162a of the main part 162 of the locking member 160 (A) (one locking member) with a double-sided tape or an adhesive agent. Do. At that time, the locking member 160 (A) is arranged in parallel to the width direction of the sheet material 2 (A), and the extending portion 163 is positioned on the long side of the sheet material 2 (A). Deploy.

  Next, as shown in FIG. 10, the locking member 160 (A) is placed in the downward groove 56 of the surrounding edge member 21 (A) that starts to be stretched with the upper surface 162 a facing upward, and the sheet material 2 (A). A length direction one end insertion process (one insertion process) is performed in which the position in the sheet width direction is aligned and inserted into the closed space 5 (A) to be closed. At this time, the longer one side of the sheet material 2 (A) bonded to the locking member 160 (A) is positioned on the closing target space 5 (A) side, and the locking member 160 (A) The sheet material 2 (A) is inserted into the downward groove 56 of the turning edge member 21 (A) so as to sandwich the sheet material 2 (A) therebetween.

  Next, the locking member 160 (A) is fastened to the downward groove 56 of the peripheral edge member 21 (A) with a plurality of drill screws 161 (A) (one fastening member) and a washer 169 (A). A length direction one end fastening step (one fastening step) is performed in which the sheet material 2 (A) is sandwiched between the bottom surface 56 a of the groove 56 and the top surface 162 a of the main body 162 of the locking member 160 (A).

  As a result, as shown in FIG. 11, the peripheral edge member 21 (A) and the locking member 160 (A) are made to squeeze the sheet material 2 (A) with the bottom surface 56 a of the downward groove 56 and the top surface 162 a of the main portion 162. The sheet material 2 (A) is sandwiched between the lower edge of the side plate portion 51 and the upward groove 168. In addition, the plurality of drill screws 161 (A) penetrates and locks the sheet material 2 (A). As a result, the one end edge side in the length direction of the sheet material 2 (A) is the peripheral edge member 21 (A), the locking member 160 (A), the plurality of drill screws 161 (A) and the washer 169 (A ) Including the wall-side support portion 3 (A). Thereafter, if there is a surplus length portion to be removed on the one end edge side of the sheet material 2 (A), the surplus length is cut and removed.

  After the length direction one end fastening step, a holder attaching step for attaching the holder 220 to the other end edge of the sheet material 2 (A) is performed. The holder 220 has a pair of long steel angle members 221 that sandwich the other edge of the sheet material 2 (A), and a plurality of drill screws 222 that connect the angle members 221 to each other. . The angle member 221 is an L-shaped component having a pair of flat plate portions 223 that are perpendicular to each other. The respective plate portions 223 of the pair of angle members 221 are overlapped with each other so that the other end edge portion of the sheet material 2 (A) is sandwiched therebetween, and these are connected by a plurality of drill screws 222. At that time, the plurality of drill screws 222 also penetrate the other end edge of the sheet material 2 (A) and lock the other end edge to the pair of angle members 221. At this time, the other plate portions 223 of the pair of angle members 221 are also overlapped. Through holes 224 are formed in the other plate portions 223 so as to be aligned with each other.

  Also, before and after this, on the side opposite to the peripheral edge member 21 (A) of the intermediate base member 25 (B) constituting the intermediate support portion 4 (B) adjacent in parallel to the wall side support portion 3 (A). The temporary fixing metal fitting attaching process for attaching the steel temporary fixing metal fitting 231 to the frame ceiling C is performed. The temporary fixing bracket 231 is an L-shaped component having a pair of flat plate portions 232 that are perpendicular to each other. A through hole 233 is formed in each of the pair of plate portions 232. The other plate portion 232 is brought into contact with the casing ceiling C in a posture in which the one plate portion 232 is positioned on the intermediate base member 25 (B) side in the sheet length direction, and the screw 234 is passed through the through hole 233 of the plate portion 232. Then, the temporary fixing bracket 231 is fixed to the casing ceiling C by being screwed into the casing ceiling C.

  Next, as shown in FIG. 11, the sheet material 2 (A) is extended to the opposite side to the peripheral edge member 21 (A) so as to pass over the lower side of the intermediate base member 25 (B), and the other end edge on the extension side. A temporary fixing process (tensile process) is performed in which the part is pulled and temporarily fixed to the casing ceiling C. At that time, the wire 236 is inserted into the through hole 224 of the pair of angle members 221 of the holder 220 and the through hole 233 of one plate portion 232 of the temporary fixing bracket 231, and the holding tool 220 and the temporary fixing bracket 231 are inserted. Hang over. In addition, the length of the wire 236 is adjusted so that the sheet material 2 (A) comes into contact with the intermediate base member 25 (B) and the wire 236 and the sheet material 2 (A) are in tension.

  Next, a locking member 160 (B) (other locking member) different from the above, with the upper surface 162a facing upward, the downward groove on the closed target space 5 (A) side of the intermediate base member 25 (B). A lengthwise intermediate insertion step (another insertion step) for insertion into 116 (B) is performed. At this time, the locking member 160 (B) is inserted in such a posture that the upper surface 162 a faces upward and the extending portion 163 faces the obstruction target space 5 (A) side with respect to the main body portion 162. This insertion further increases the tension of the sheet material 2 (A).

  Next, the locking member 160 (B) is fastened to the downward groove 116 (B) of the intermediate base member 25 (B) with a plurality of drill screws 161 (B) (other fastening members) and washers 169 (B). A lengthwise intermediate fastening step (other fastenings) in which the intermediate portion of the sheet material 2 (A) is sandwiched between the bottom surface 116a of the downward groove 116 (B) and the top surface 162a of the main portion 162 of the locking member 160 (B). Step).

  Thereby, the intermediate base member 25 (B) and the locking member 160 (B) sandwich the sheet material 2 (A) between the bottom surface 116 a of the downward groove 116 (B) and the top surface 162 a of the main body 162, Further, the sheet material 2 (A) is sandwiched between the lower end edge portion of the side plate portion 111 on the closed target space 5 (A) side and the upward groove 168. In addition, the plurality of drill screws 161 (B) are in a state of penetrating and locking the sheet material 2 (A). As a result, the intermediate portion in the length direction of the sheet material 2 (A) is an intermediate base member 25 (B), a locking member 160 (B), a plurality of drill screws 161 (B) and washers 169 (B ), And the sheet material 2 (A) is installed between the wall side support 3 (A) and the intermediate support 4 (B) in a tensioned state. Is done.

  Next, an intermediate portion cutting step is performed in which the other end edge side, that is, the holding tool 220 side is cut from the sandwiched portion between the intermediate base member 25 (B) and the locking member 160 (B). For example, a cutter is inserted into the gap between the lower extending plate 112 on the locking member 160 (B) side of the intermediate base member 25 (B) and the locking member 160 (B), and the cutter is moved along this gap. Sheet material 2 (A) is cut.

  Next, intermediate support portions 4 (C) and 4 (D) on both sides in the sheet width direction surrounding the closed space 5 (A) are configured by the wall side support portion 3 (A) and the intermediate support portion 4 (B). The extended portion 163 is placed in the closing target space 5 (A) side in the downward grooves 116 (C) and 116 (D) on the closing target space 5 (A) side of the intermediate base members 25 (C) and 25 (D). Both ends in the width direction for inserting the locking members 160 (C) and 160 (D) in a posture toward the front, the intermediate base members 25 (C) and 25 (D), and the locking members 160 (C) and 160 A width direction both-end fastening process of fastening (D) with a plurality of drill screws 161 (C), 161 (D) and washers 169 (C), 169 (D) is performed.

  As a result, both end edges in the width direction of the sheet material 2 (A) are connected to the bottom surfaces 116 a of the downward grooves 116 (C) and 116 (D) of the intermediate base members 25 (C) and 25 (D) and the locking members. 160 (C), 160 (D) is sandwiched between the upper surface 162a of the main portion 162, and further, the lower edge of the side plate portion 111 of the intermediate base members 25 (C), 25 (D) on the side to be closed 5 (A) side. And a plurality of drill screws 161 (C), 161 (D) are penetrated and locked. As a result, both end edges in the width direction of the sheet material 2 (A) are intermediate base members 25 (C) and 25 (D), locking members 160 (C) and 160 (D), and a plurality of fastening members. It will be in the state supported by intermediate support part 4 (C) and 4 (D) containing drill screw 161 (C), 161 (D) and washer 169 (C), 169 (D).

  In this way, the four edge portions of the sheet material 2 (A) are supported by the one wall side support portion 3 (A) and the three intermediate support portions 4 (B) to 4 (D). Thus, it is stretched in a tensioned state so as to close the closing target space 5 (A) between them. Here, when the part which divides any one of the obstruction | occlusion object space 5 in the sheet | seat width direction is not the intermediate | middle support part 4 but the wall side support part 3, below the surrounding edge member 21 of this wall side support part 3 The locking member 160 is inserted in the orientation groove 56 in a posture in which the extending portion 163 faces the closed target space 5 side, and fastened with a drill screw 161, thereby supporting one edge in the width direction of the sheet material 2.

  The tension end (between the wall-side support parts 3 and 3), in which the sheet material 2 (I) is extended in the closed space 5 (I) between the intermediate support part 4 (H) and the wall-side support part 3 (J) The same applies to the case where the sheet material 2 is stretched in one of the closed spaces 5), and one end edge side in the length direction of the sheet material 2 (I) is the main body of the locking member 160 (I) (one locking member). An adhesion process similar to the above is performed to adhere to the upper surface 162a of the part 162, and the intermediate base member 25 (H) (one base material) constituting the intermediate support part 4 (H) on the closing target space 5 (I) side. A length direction one end insertion step (one insertion step) similar to the above for inserting the locking member 160 (I) after the bonding step into the downward groove 116 (I), and a locking member 160 (I) A plurality of drill screws 161 (I) (one fastening member) and a washer 169 (I) with the downward groove 116 ( Performing the above and similar length direction end fastening step of fastening (one fastening step) in).

  Thereby, the one end edge side of the sheet material 2 (I) in the length direction is arranged on the bottom surface 116a of the downward groove 116 (I) of the intermediate base member 25 (H) and the upper surface of the main portion 162 of the locking member 160 (I). 162a, and further sandwiched between the lower edge of the side plate portion 111 on the closing target space 5 (I) side of the intermediate base member 25 (H) and the upward groove 168 of the locking member 160 (I). The drill screw 161 (I) penetrates and is locked. As a result, as shown in FIG. 12, one end edge in the length direction of the sheet material 2 (I) is the intermediate base member 25 (H), the locking member 160 (I), and a plurality of drill screws 161 ( I) and the intermediate support portion 4 (H) including the washer 169 (I).

  Here, before this, the downward groove 116 (H) on the opposite side of the closing target space 5 (I) of the intermediate base member 25 (H), the locking member 160 (H) inserted into this, The seat 2 (H) on the opposite side to the closed space 5 (I) is supported by the drill screw 161 (H) and the washer 169 (H) for fastening them.

  Before and after the above, as shown in FIG. 12 and FIG. 13, as shown in FIG. 12 and FIG. Temporary jigs 241 (K), adjacent to the peripheral edge member 21 (J) (other base material) constituting the wall-side support portion 3 (J), on the laterally extending plate portion 45 at the position of the groove 56. 241 (L) is fixed with drill screws 242 (K) and 242 (L), respectively, and a support fixture attaching process for attaching a support fixture 243 made of a round pipe to these is performed. The temporary jigs 241 (K) and 241 (L) are opened downward, and when the support tool 243 is fitted from the lower side, the support tool 243 is spread and elastically deformed, and the support tool 243 is brought into a predetermined position. When positioned, the support 243 is held by return of elastic deformation. The support 243 is supported by the temporary jigs 241 (K) and 241 (L) at both ends in the sheet width direction, and the position to be closed 5 (I) and the position in the sheet length direction are aligned with each other. It arrange | positions so that the other closure object space 5 located in a line may be crossed in the sheet width direction.

  As described above, the sheet material 2 (I) with one end edge in the length direction supported by the intermediate support 4 (H) is used as the wall surface of the frame wall W to which the surrounding edge member 21 (J) is attached. The sheet material 2 (I) is extended toward the support member 243 so that the intermediate part on the expansion side of the sheet material 2 (I) is supported by the support tool 243, and the other end portion on the expansion side of the sheet material 2 (I) is supported. A tensioning step is performed in which the weight 245 is pulled downward. At this time, the holder 220 described above is attached to the other end of the sheet material 2 (I) in the same manner as described above. At this time, the holder 220 is attached in such a direction that the plate portion 223 in which the through-hole 224 is formed extends from the lower end of the plate portion 223 sandwiching the sheet material 2 (I) toward the closing target space 5 (I). And the other end part by the side of the expansion | deployment side of the sheet | seat material 2 (I) is pulled below by penetrating the through-hole 224 and suspending the weight 245. As a result, the sheet material 2 (I) enters a tension state in which tension is generated.

  Next, while pressing the sheet material 2 (I) against the wall surface of the housing wall W to which the surrounding edge member 21 (J) is attached with the pressing jig 246, the locking member 160 (J) (other locking member) A tension end insertion step (another insertion step) in which the extension portion 163 is inserted into the downward groove 56 of the peripheral edge member 21 (J) in a posture in which the extension portion 163 faces the closed target space 5 (I). Tightening end fastening process of fastening the stop member 160 (J) to the downward groove 56 of the peripheral edge member 21 (J) with a plurality of drill screws 161 (J) (other fastening members) and washers 169 (J) Fastening process). Here, the pressing jig 246 has a prismatic pressing portion 247 and a handle portion 248, and the operator holds the handle portion 248 with his hand and holds the sheet material 2 (I) with the casing wall W. While pressing against the wall surface, the insertion process at the end of tension and the fastening process at the end of tension are performed.

  By the tightening and fastening process, the intermediate portion in the length direction of the sheet material 2 (I) is formed between the bottom surface 56a of the downward groove 56 of the peripheral edge member 21 (J) and the main portion 162 of the locking member 160 (J). It is clamped by the upper surface 162a, and is further clamped by the lower edge of the side plate portion 51 of the turning edge member 21 (J) and the upward groove 168 of the locking member 160 (J), and the drill screw 161 (J) passes therethrough. To be locked. As a result, the intermediate portion in the length direction of the sheet material 2 (I) turns around the edge member 21 (J), the locking member 160 (J), a plurality of drill screws 161 (J) and washers 169 (J) for fastening them. It will be in the state supported by the wall side support part 3 (J) containing this. As described above, the sheet material 2 (I) is installed between the intermediate support portion 4 (H) and the wall-side support portion 3 (J) in a tension state that generates tension.

  An end-of-tension cutting step of cutting the other end edge side of the sheet material 2 (I) between the surrounding edge member 21 (J) and the locking member 160 (J), that is, the holding member 220 side, is performed. For example, the cutter is inserted into the gap between the lower extension plate portion 52 of the surrounding edge member 21 (J) and the locking member 160 (J), and the cutter is moved along the gap to cut the sheet material 2 (I). To do.

  Thereafter, the support 243, the drill screws 242 (K), 242 (L) and the temporary jigs 241 (K), 241 (L) are removed, and the intermediate support portion 4 (H) and the wall side support portion 3 (J) are used. The intermediate support portions 4 (M) and 4 (N) on both sides in the sheet width direction surrounding the closed space 5 (I) are constructed by the width direction both ends inserting step and the width direction both ends fastening step similar to the above.

  By repeating the above appropriately, all the blocking target spaces 5 of the base structure portion 1 are closed with the sheet material 2.

  Then, a cover attaching step is performed in which the cover members 181 are attached to all the surrounding edge members 21 and the cover members 182 are attached to all the intermediate base members 25.

  In this state, the upper end edges of the upper extension plate portions 193 of all the cover members 181 and the upper end edge portions of the upper extension plate portions 203 of all the cover members 182 are aligned with each other in height. All the sheet materials 2 are lifted slightly to eliminate the gap with the sheet material 2 and the inner portion of the sheet material 2 is held in a horizontal flat shape. In this way, the lower surface of all the sheet members 2, the lower surfaces of all the cover members 181, and the lower surfaces of all the cover members 182 form the ceiling surface 210.

  According to the present embodiment described above, the wall-side support portion 3 includes the bottom surface 56a of the downward groove 56 formed to extend in the length direction of the long peripheral edge member 21, and the downward groove 56. The sheet material 2 is sandwiched between the upper surface 162a of the elongated locking member 160 inserted therein, and the sheet material 2 is supported by fastening the locking member 160 to the downward groove 56 with a drill screw 161. . Further, the intermediate support portion 4 includes a bottom surface 116 a of a downward groove 116 that extends in the length direction of the long intermediate base member 25, and a long engagement member that is inserted into the downward groove 116. The sheet material 2 is sandwiched between the upper surface 162 a of the stopper member 160 and the sheet member 2 is supported by fastening the locking member 160 to the downward groove 116 with a drill screw 161. In this way, the sheet material 2 is sandwiched between the peripheral edge member 21 and the locking member 160, or is sandwiched between the intermediate base member 25 and the locking member 160, so that the sheet material 2 is not dependent on its stretchability. It can be supported and is suitable for construction on site. Therefore, it is suitable for construction when the sheet material 2 is a glass cloth or the like having a low stretchability.

  Further, since the sheet material 2 is sandwiched between the two parts of the peripheral edge member 21 and the locking member 160 or the two parts of the intermediate base member 25 and the locking member 160, the occurrence of loosening and wrinkles can be suppressed and improved. Can be constructed. Further, the bottom surface 56a of the downward groove 56 of the peripheral edge member 21 and the upper surface 162a of the locking member 160 sandwich the sheet material 2 from both sides, and in this state, the locking member 160 is inserted into the downward groove 56 with a drill screw 161. Since it is fastened, high support rigidity is obtained for the wall-side support portion 3. Similarly, the bottom surface 116a of the downward groove 116 of the intermediate base member 25 and the upper surface 162a of the locking member 160 sandwich the sheet material 2 from both sides, and in this state, the locking member 160 is inserted into the downward groove 116 with the drill screw 161. Therefore, high support rigidity is obtained for the intermediate support portion 4.

  Further, the sheet material 2 is sandwiched between the upward groove 168 of the locking member 160 and the lower edge of the side plate portion 51 which is a wall portion forming the downward groove 56 of the peripheral edge member 21, or the locking member Since the sheet material 2 is sandwiched between the upward groove 168 of 160 and the lower edge of the side plate portion 111 that is the wall portion forming the downward groove 116 of the intermediate base member 25, the sheet material 2 is loosened or wrinkled. It is possible to construct with further suppression.

  Further, the peripheral edge member 21 that supports the casing wall W side of the sheet material 2 has only one downward groove 56, and there is no unnecessary downward groove. In addition, since the intermediate base member 25 that supports the portion other than the housing wall W side of the sheet material 2 has two downward grooves 116, the two base members 2 are located close to each other as one intermediate base member. 25 can be supported. Therefore, both can reduce the cost.

  Further, since the intermediate base member 25 is easily connected to the frame ceiling C via the suspension bolt 23, the intermediate base member 25 is likely to shake (sway) when an earthquake occurs, but the intermediate base member 25 extends obliquely upward. Since the diagonal connecting portions 155 that are connected to the frame ceiling C are attached to both sides in the width direction, the shake can be suppressed.

  Further, the sheet material 2 can be temporarily fixed to the casing ceiling C, except for the construction in which the sheet material 2 is stretched and mounted toward the surrounding edge member 21 attached to the casing wall W. The locking member 160 is inserted into the downward groove 116 of the intermediate base member 25, and the locking member 160 is fastened to the downward groove 116 with a drill screw 161. For this reason, the sheet material 2 can be satisfactorily spread between the surrounding edge member 21 and the intermediate base member 25 at the beginning of the tension, and between the intermediate base member 25 and the intermediate base member 25.

  Further, for the construction in which the sheet material 2 is stretched and mounted toward the peripheral edge member 21 attached to the frame wall W, which cannot be temporarily fixed to the frame ceiling C, the sheet material 2 is attached to the frame wall W. The end portion on the expansion side is pulled downward by the weight 245 while the intermediate portion on the expansion side is supported by the support 243 and the sheet material 2 is pressed against the wall surface of the casing wall W in this state. Then, the locking member 160 is inserted into the downward groove 56 of the peripheral edge member 21 attached to the housing wall W, and the locking member 160 is fastened to the downward groove 56 of the peripheral edge member 21 with the drill screw 161. For this reason, the sheet material 2 can be satisfactorily stretched between the intermediate base member 25 and the surrounding edge member 21 at the end of tension.

  In the above embodiment, the case where the intermediate base member 25 is connected to the casing ceiling C via the suspension bolt 23 has been described as an example. However, the intermediate base member 25 may be directly attached to the casing ceiling C. In this case, as shown in FIG. 14, the above-mentioned L-shaped fixture 141 can be used. That is, in a state where the edge portion of the plate portion 143 of the L-shaped fixing fitting 141 opposite to the plate portion 144 is in contact with the upper surface of the intermediate plate portion 103 of the intermediate base member 25, the plurality of drill screws 251 are After being inserted into the through hole 145 of the plate portion 143, the plate portion 143 is fixed to the mounting plate portion 102 by being screwed into the mounting plate portion 102. In this way, the L-shaped fixing fitting 141 is fixed symmetrically on the outside of each of the pair of mounting plate portions 102. A plurality of such a pair of L-shaped fixtures 141 are attached at intervals in the length direction of the intermediate base member 25.

  Then, with the plate portion 144 of the L-shaped fixture 141 being in contact with the housing ceiling C, a plurality of bolts 252 are inserted into the through holes 146 of the plate portion 144 and then attached to an anchor (not shown) of the housing ceiling C. The plate portion 144 is fixed to the housing ceiling C by screwing. Then, the upper base plate portion 101 of the intermediate base member 25 also comes into contact with the casing ceiling C. In this case, although not shown, the peripheral edge member 21 is also attached to the frame wall W with the upper end plate portion 46 in contact with the frame ceiling C. As a result, the above-described suspension bolt 23, hanger 24, nut 71, spring washer 72, washer 73, nut 74, and base structure portion 1 without the brace 28 are directly attached to the casing ceiling C.

  Moreover, it is also possible to change the said embodiment like the modification shown in FIG. 15 and FIG. In this modification, the locking member 160 is composed only of the main body portion 162 and is not provided with the extending portion 163 shown in FIGS. Further, as shown in FIG. 15, the peripheral edge member 21 has a protruding portion 300 that protrudes from the lower end edge portion of the side plate portion 51 in the direction opposite to the downwardly extending plate portion 52. The lower extension plate part 52 and the height position of the lower end are matched. Further, the cover member 181 is not provided with the upwardly extending plate portion 193 shown in FIG. 4, and the cover plate portion 192 is aligned with the protruding portion 300 at the tip position. The sheet material 2 extends from between the protruding portion 300 and the cover plate portion 192.

  Also, as shown in FIG. 16, the intermediate base member 25 similarly has a pair of projecting portions 301 that project in the opposite direction from the lower extending plate portion 112 from the lower end edge portions of the pair of side plate portions 111. These projecting portions 301 are aligned with the lower extension plate portion 112 at the lower end height position. Further, the cover member 182 is not provided with the pair of upper extending plate portions 203 shown in FIG. 7, and the cover plate portion 202 is aligned with the pair of protruding portions 301 at both ends. The sheet material 2 extends from between the protruding portion 301 and the cover plate portion 202. If comprised in this way, the manufacturing cost of the locking member 160, the surrounding edge member 21, the intermediate | middle base member 25, and the cover members 181 and 182 can be reduced.

2 Sheet material 3 Wall side support part (support part)
4 Intermediate support part (support part)
23 Suspension bolt 51 Side plate (wall)
56 Downward groove 56a Bottom surface 111 Side plate (wall)
116 Downward groove 116a Bottom surface 155 Diagonal connecting portion 161 Drill screw (fastening member)
162a upper surface 168 upward groove 181 cover member 182 cover member 210 ceiling surface W housing wall C housing ceiling

Claims (6)

A membrane ceiling structure that forms a ceiling surface by supporting a sheet material having low elasticity at a plurality of support portions in a stretched state,
The support portion is
A long base material in which downward grooves opened downward extend in the length direction; and
A long locking member inserted into the downward groove and having an upper surface sandwiching the sheet material with the bottom surface of the downward groove;
A fastening member for fastening the locking member to the downward groove;
A cover member that covers the downward groove, the locking member, and the fastening member and is attached to the base material;
I have a,
The locking member is a rectangular tube shape,
The base material includes a side plate portion and a downward extending plate portion that are parallel to each other to form the downward groove, and a first engagement portion that is provided on the opposite side of the downward extending plate portion from the side plate portion. With
The cover member includes a cover plate portion that covers the downward groove, the locking member, and the fastening member, and a second engagement portion that is engaged with the first engagement portion and is prevented from coming off. A membrane ceiling structure characterized by In the locking member, an upward groove opening upward is formed extending in the length direction,
The membrane ceiling structure according to claim 1, wherein the upward groove sandwiches the sheet material with a lower edge of a wall portion forming the downward groove of the base material. The base material is
A surrounding edge member fixed to the housing wall with one downward groove;
An intermediate base member connected to the cabinet ceiling with two downward grooves,
The membrane ceiling structure according to claim 1 or 2, characterized by comprising: The intermediate base member is connected to the casing ceiling via a suspension bolt,
The membrane ceiling structure according to claim 3, wherein the intermediate base member is provided with oblique connection portions extending obliquely upward and connected to the frame ceiling on both sides in the width direction. It is a construction method of the membrane ceiling structure according to any one of claims 1 to 4,
One insertion step of inserting one locking member into one base material downward groove so as to sandwich the sheet material therebetween;
The one locking member is fastened to the downward groove of the one base material with one fastening member, and the sheet material is sandwiched between the bottom surface of the downward groove and the upper surface of the one locking member. Fastening process;
A tensioning process in which the sheet material is stretched over the lower side of the other base material and the end of the stretching side is pulled;
Another insertion step of inserting another locking member into the downward groove of the other base material,
The other locking member is fastened to the downward groove of the other base material with another fastening member, and the sheet material is sandwiched between the bottom surface of the downward groove and the upper surface of the other locking member. Fastening process;
A cover attaching step of attaching one cover member to the one base material so as to cover the downward groove of the one base material, the one locking member, and the one fastening member;
Another cover attaching step of attaching another cover member to the other base material so as to cover the downward groove of the other base material, the other locking member, and the other fastening member;
A method for constructing a membrane ceiling structure, comprising: It is a construction method of the membrane ceiling structure according to any one of claims 1 to 4,
One insertion step of inserting one locking member into one base material downward groove so as to sandwich the sheet material therebetween;
The one locking member is fastened to the downward groove of the one base material with one fastening member, and the sheet material is sandwiched between the bottom surface of the downward groove and the upper surface of the one locking member. Fastening process;
A tensioning process in which the sheet material is stretched toward the housing wall surface and the end on the stretching side is pulled,
Another insertion step of inserting the other locking member into the downward groove of the other base material while pressing the sheet material against the wall surface of the housing,
The other locking member is fastened to the downward groove of the other base material with another fastening member, and the sheet material is sandwiched between the bottom surface of the downward groove and the upper surface of the other locking member. Fastening process;
A cover attaching step of attaching one cover member to the one base material so as to cover the downward groove of the one base material, the one locking member, and the one fastening member;
Another cover attaching step of attaching another cover member to the other base material so as to cover the downward groove of the other base material, the other locking member, and the other fastening member;
A method for constructing a membrane ceiling structure, comprising:

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