JP2014185507A - Ceiling fall preventing tool and ceiling fall preventing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a ceiling fall preventing tool for preventing a ceiling plane from falling, easy to install on the ceiling plane regardless of whether the ceiling plane is newly constructed or existing, and having an excellent external appearance; and a ceiling fall preventing method.SOLUTION: The ceiling fall preventing tool includes: a net part 12 installed below a ceiling plane 4 constituted of a plurality of ceiling finishing materials 3; a frame part 13 for holding the net part 12; and a connection part 15 inserted in a penetration part formed in the ceiling finishing materials 3, with one side fixed to an attic C and with the other side fixed to the frame part 13. Thereby, a ceiling fall preventing tool 11 can be provided, which holds the ceiling plane 4 from below by the net part 12 to prevent the ceiling plane 4 from falling, is easy to install on the ceiling plane regardless of whether the ceiling plane is newly constructed or existing without assembling a footing for an existing ceiling plane, and has an excellent external appearance.

Description

  The present invention relates to a ceiling fall prevention tool and a ceiling fall prevention method for preventing a ceiling surface from falling.

  Conventionally, as a means for preventing the ceiling surface from dropping, a net is installed on the entire lower surface of the ceiling surface, and the falling ceiling surface is held by the net (Patent Document 1).

JP 7-259348 A

  However, in the conventional structure that prevents the ceiling surface from falling, there is a problem that it is difficult to install the net and the appearance of the ceiling surface is impaired.

  Therefore, the present invention aims to provide a ceiling fall prevention device and a ceiling fall prevention method that prevent the ceiling surface from falling and can be easily installed on the ceiling surface regardless of whether it is newly installed or existing, and have an excellent appearance. To do.

  According to a first aspect of the present invention, a mesh part installed below a ceiling surface composed of a plurality of ceiling finishing materials, a frame part for holding the mesh part, and a through part formed in the ceiling finishing material are inserted. And a connecting part fixed to the frame part and the other fixed to the back of the ceiling.

  The invention according to claim 2 is characterized in that a plurality of the net portions have a shape that can be installed on the ceiling finishing material.

  According to a third aspect of the present invention, a male screw portion is provided on the other of the connecting portions, a receiving portion for holding the frame body is provided, and the other of the connecting portions is inserted into an attachment hole provided in the receiving portion. In this state, the frame portion and the connecting portion are fixed by screwing a nut into the male screw portion.

The invention of claim 4 is characterized in that a positioning portion corresponding to the orientation of the frame portion is provided on the one of the connecting portions.
According to a fifth aspect of the present invention, there is provided a string passage portion through which the string member can be inserted into the one of the connecting portions, and the string member inserted into the string passage portion is inserted into the ceiling from below the ceiling surface through a penetration portion. The ceiling fall prevention device is provided so that it can be pulled up to the back.

  According to a sixth aspect of the present invention, the one side of the connecting portion is provided with a male screw portion, a ceiling side connecting member provided with a female screw portion is attached to the male screw portion, and an annular portion provided in the ceiling side connecting member. Is fixed to the back of the ceiling via a connecting means.

  The invention of claim 7 is characterized in that the surface of the frame is covered with a sound absorbing material.

  The invention of claim 8 is characterized in that the surface of the sound absorbing material is covered with a cover member.

  The invention according to claim 9 is characterized in that a sound absorbing material is built in the receiving portion, and the receiving portion is provided with a plurality of through portions that communicate the sound absorbing material with the outside.

  The invention according to claim 10 is characterized in that the mesh portion is formed by stretching a mesh member on a mesh portion side frame member that can be placed on the frame portion.

  According to an eleventh aspect of the present invention, the net portion is composed of a plurality of wire members that are laid in a net shape on the frame portion.

  The invention of claim 12 is characterized in that the mesh portion is composed of a mesh member stretched on the frame portion.

  According to a thirteenth aspect of the present invention, a mesh part installed below a ceiling surface composed of a plurality of ceiling finishing materials, a frame part that holds the mesh part, and a penetration part formed in the ceiling finishing material are inserted. And a ceiling fall prevention method for preventing the ceiling surface from falling using a ceiling fall prevention device provided with a connection part fixed to the back of the ceiling and one side fixed to the frame part, The one of the connecting portions is provided with a string passing portion through which a string member can be inserted, and the string member inserted through the string passing portion is pulled up to the back of the ceiling from below the ceiling surface through the through portion. Then, after lifting the ceiling fall prevention device installed on the floor, one of the connecting portions is fixed to the back of the ceiling.

  According to a fourteenth aspect of the present invention, a mesh part installed below a ceiling surface composed of a plurality of ceiling finishing materials, a frame part for holding the mesh part, and a penetration part formed in the ceiling finishing material are inserted. And a ceiling fall prevention method for preventing the ceiling surface from falling using a ceiling fall prevention device provided with a connection part fixed to the back of the ceiling and one side fixed to the frame part, One of the connecting portions is fixed to the back of the ceiling, and the frame portion is fixed together with the mesh portion from the lower portion of the ceiling surface to the other of the connecting portions exposed from the through portion to the lower portion of the ceiling surface. It is characterized by.

  According to the first aspect of the present invention, the ceiling surface is held from below by the net portion to prevent the ceiling surface from falling, and the ceiling surface can be installed regardless of whether it is newly installed or existing without forming a scaffold with respect to the existing ceiling surface. It is possible to provide a ceiling fall prevention device that is easy to install and has an excellent appearance.

  According to the invention of claim 2, various kinds of ceiling finishing materials, ceiling base materials that constitute the ceiling together with the ceiling base materials, heat insulating materials used as desired, sound absorbing materials, shielding materials such as lead plates for shielding radiation, etc. An appropriate fall prevention structure according to the weight of the ceiling can be constructed by changing the number of ceiling fall prevention tools installed on the ceiling surface according to the weight of the ceiling made of a functional material or the like.

  According to the invention of claim 3, the frame portion and the connecting portion are fixed by the male screw portion and the nut so that the frame portion and the connecting portion can be attached and detached, and the ceiling drop of the present invention is applied to the existing ceiling surface. When the preventer is retrofitted, it is possible to install the connecting portion on the ceiling finishing material in advance, and then fix the connecting portion and the frame portion below the ceiling surface, thereby improving workability.

  According to the invention of claim 4, the work of aligning the orientation of each frame portion when installing a plurality of ceiling fall prevention devices by grasping the orientation of the frame portion below the ceiling surface from the ceiling back side by the positioning portion. This makes it easy to prevent the appearance of the ceiling surface from being damaged.

  According to the invention of claim 5, the lifting work of the ceiling fall prevention tool with respect to the high ceiling surface separated from the floor surface is facilitated, and the workability is improved.

  According to the invention of claim 6, it is possible to easily fix the ceiling fall prevention tool to the back of the ceiling.

  According to the invention of claim 7, the sound near the ceiling surface is prevented from being reflected by the frame portion, and the ceiling surface is prevented from falling without impairing the acoustic performance in a facility having excellent acoustic performance. be able to.

  According to the eighth aspect of the present invention, it is possible to prevent the sound absorbing material on the surface of the frame portion from falling off.

  According to the invention of claim 9, the sound near the ceiling surface is prevented from being reflected by the receiving portion, and the ceiling surface can be prevented from falling without impairing the acoustic performance even in a facility having excellent acoustic performance. can do.

  According to the tenth aspect of the present invention, since the mesh portion and the frame portion are separate, the mesh portion can be easily replaced.

  According to the eleventh aspect of the present invention, since the net portion and the frame portion are integrated, it is easy to attach the ceiling fall prevention tool.

  According to the twelfth aspect of the present invention, since the net portion and the frame portion are integrated, it is easy to attach the ceiling fall prevention tool.

  According to the invention of claim 13, the ceiling surface is held from below by the net portion to prevent the ceiling surface from falling, and the existing ceiling surface can be installed by working from the back of the ceiling without forming a scaffold with respect to the existing ceiling surface. Can be easily installed on the ceiling surface, and a ceiling fall prevention device having an excellent appearance can be provided.

  According to the fourteenth aspect of the present invention, the ceiling surface is held from below by the net portion to prevent the ceiling surface from falling, and the ceiling can be easily installed on the ceiling surface of a newly built building, and the ceiling has an excellent appearance. Tools can be provided.

It is a perspective view which shows the ceiling fall prevention tool in 1st Example of this invention. It is sectional drawing which shows the use condition of a ceiling fall prevention tool same as the above. It is an exploded perspective view of a ceiling fall prevention tool same as the above. It is a perspective view which shows the state which mounted | wore with one side of the connection part of the ceiling fall prevention tool same as the above. It is a perspective view which shows the use condition of a ceiling fall prevention tool same as the above. It is the perspective view which looked at the use condition of the ceiling fall prevention tool from the downward direction of the ceiling surface same as the above. It is a bottom view of the ceiling surface which shows the state which installed the some ceiling fall prevention tool in the ceiling finishing material same as the above. It is sectional drawing which shows the state which has pulled up the ceiling fall prevention tool with respect to the existing ceiling surface same as the above. It is an exploded sectional view showing the state where a ceiling fall prevention tool is assembled with a newly installed ceiling surface. It is a perspective view which shows a ceiling structure same as the above. It is a perspective view of a field edge mounting bracket same as the above. It is sectional drawing which shows the state which attached the field edge attachment metal fitting to the wide field edge member same as the above. It is sectional drawing which shows the state which attached the field edge attachment metal fitting to the narrow field edge member same as the above. It is a perspective view of a narrow connection metal fitting same as the above. It is a perspective view which shows the use condition of a narrow connection metal fitting same as the above. It is sectional drawing which shows the use condition of a narrow connection metal fitting same as the above. It is a perspective view of a wide connection metal fitting same as the above. It is a perspective view which shows the use condition of a wide connection metal fitting same as the above. It is sectional drawing which shows the use condition of a wide connection metal fitting same as the above. It is sectional drawing which shows the use condition of another embodiment of a narrow connection metal fitting same as the above. It is a perspective view which shows another embodiment of a narrow connection metal fitting same as the above. It is a perspective view which shows another embodiment of a wide type | mold coupling metal fitting same as the above. It is sectional drawing which shows another use condition of a narrow connection metal fitting same as the above. It is sectional drawing which shows another use condition of a narrow connection metal fitting same as the above. It is sectional drawing which shows another use condition of a wide connection metal fitting same as the above. It is a perspective view which shows another embodiment of a narrow connection metal fitting same as the above. It is a perspective view which shows another embodiment of a wide type connection metal fitting same as the above. It is a perspective view which shows the usage condition of the narrow connection metal fitting shown in FIG. It is a perspective view which shows the usage condition of the wide type | mold coupling metal fitting shown in FIG. It is sectional drawing which shows the use condition of the ceiling fall prevention tool in 2nd Example of this invention. It is a perspective view of the ceiling fall prevention tool in the 3rd example of the present invention. It is a perspective view of the ceiling fall prevention tool in 4th Example of this invention. It is principal part sectional drawing of the frame part in the ceiling fall prevention tool in 5th Example of this invention. It is sectional drawing of a receiving part same as the above. It is sectional drawing which shows the state which installed the ceiling fall prevention tool coat | covered with the cover member in 6th Example of this invention. It is sectional drawing which shows the part to which the cover member adjoined same as the above. It is a bottom view of the ceiling surface which shows the state which installed the several ceiling fall prevention tool coat | covered with the cover member on the ceiling finishing material same as the above. It is a perspective view of the ceiling fall prevention tool coat | covered with the cover member same as the above. It is sectional drawing which shows the state which has pulled up the ceiling fall prevention tool coat | covered with the cover member with respect to the ceiling surface same as the above. It is sectional drawing which shows the use condition of the ceiling fall prevention tool in 7th Example of this invention. It is sectional drawing which shows another use condition same as the above. It is a perspective view of a rail member same as the above. It is sectional drawing which shows the use condition of the ceiling fall prevention tool in 8th Example of this invention. It is sectional drawing which shows another use condition same as the above. It is a perspective view of a rail member same as the above. It is sectional drawing which shows the use condition of the ceiling fall prevention tool in 9th Example of this invention. It is a perspective view of a rail member and a mounting bracket same as the above. It is sectional drawing of the ceiling structure in 10th Example of this invention. It is sectional drawing which shows another embodiment of a ceiling structure same as the above. It is sectional drawing which shows another embodiment of a ceiling structure same as the above. It is sectional drawing which shows another embodiment of a ceiling structure same as the above. It is sectional drawing which shows the use condition of the ceiling fall prevention tool in 11th Example of this invention. It is a bottom view of a ceiling structure same as the above. It is an expanded sectional view of a ceiling structure same as the above. It is the expanded sectional view which looked at the ceiling structure from another angle same as the above. It is the perspective view which looked at the connection metal fitting from diagonally forward same as the above. It is the perspective view which looked at the connection metal fitting from diagonally back same as the above. It is a partially cutaway cross-sectional perspective view of a connection metal fitting same as the above.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  1 to 29 show a first embodiment of the present invention. A ceiling 1 according to the present embodiment has a plurality of ceiling finishes on a plurality of field members 2 arranged parallel to each other at intervals. When the material 3 is attached and integrated, it has a suspended ceiling structure that constitutes the ceiling surface 4 as a whole.

  Here, a detailed description will be given of an example of the suspended ceiling structure of the present embodiment. A groove having a substantially C-shaped cross section in which a field-side groove portion 5 as a groove portion is formed along the longitudinal direction (X direction in the drawing). A plurality of field members 2 made of shape steel and a suspension bolt 7 as a suspended member suspended from a ceiling slab 6 (not shown) as an upper structure such as a concrete base, is known in the form of a substantially S-shaped shape steel or the like. And a field receiving member 9 made of a steel having a substantially C-shaped cross section connected via a hanging means 8 such as a hanger of the present invention are integrated perpendicularly to each other to form a lattice body 10 as a ceiling base material, A ceiling finishing material 3 made of a plaster board, a panel, or the like is attached to the lower surface of the field edge member 2 by a fixing means (not shown) such as a screw.

  The ceiling drop prevention tool 11 used in the small area net multiple mounting ceiling method of the present embodiment will be described. The ceiling fall prevention tool 11 is inserted through a mesh part 12 installed below the ceiling surface 4, a frame part 13 holding the mesh part 12, and a first through part 14 formed in the ceiling finishing material 3, One side is fixed to the ceiling back C, and the other has a connecting part 15 fixed to the frame part 13.

  The mesh part 12 includes a mesh part side frame member 16 in which a metal wire is formed in an annular shape having substantially the same shape as the frame part 13, and a mesh member 17 stretched around the mesh part side frame member 16.

  The net member 17 is not limited to a net made of a synthetic resin such as a polyethylene net, a nylon net or a polyester net, a net made of a natural material such as a wire net or a cotton net, or a combination thereof, and is appropriately changed. Is possible.

  In addition, as a net made of synthetic resin, as a so-called flameproof net such as a polyethylene net or a polypropylene net that has flame retardancy and conforms to the performance specified by various laws and regulations such as the Building Standard Law and the Fire Service Law Shall.

  In addition, an opening 18 through which the connecting portion 15 can be inserted is formed in the central portion of the net portion 12.

  The frame part 13 is a frame part side frame member 19 in which a metal wire is formed in an annular shape, and a frame part side connecting member 20 made of a hollow cylindrical member installed at the center part of the frame part side frame member 19, A support member 21 made of a plurality of linear wires that are installed radially from the central portion of the frame portion side frame member 19 and connect the frame portion side frame member 19 and the frame portion side connection member 20; and a frame portion side frame An intermediate frame member 22 is provided between the member 19 and the frame side connecting member 20 and is fixed to the support member 21.

  The intermediate frame member 22 is a metal wire formed in an annular shape that is similar to the frame side frame member 19 and smaller than the frame side frame member 19, and is installed concentrically with the frame side frame member 19. is there.

  The connecting portion 15 is a full screw member made of a metal rod-like member that can be inserted through the first through portion 14. Therefore, one of the connecting portions 15 has a first male screw portion 23 and the other end has a second male screw portion 24, and a screw portion is also formed at an intermediate portion thereof.

  Further, a prismatic positioning portion 25 having a rectangular planar shape when viewed from the axial direction of the connecting portion 15 is provided at one end portion of the connecting portion 15. A side portion of the positioning portion 25 is provided with a string passage portion 26 that is formed so as to penetrate the connecting portion 15 in the radial direction and into which a wire member or the like can be inserted.

  As a structure for connecting and fixing the frame portion 13 and the connecting portion 15, the frame portion 13 is installed below the frame portion 13, the other of the connecting portions 15 is fixed, and the frame portion 13 can be suspended and held on the other of the connecting portions 15. A receiving part 27 is provided.

  The receiving portion 27 has a bottomed cylindrical shape that opens upward. The planar shape of the receiving portion 27 is formed in a circular shape which is a shape with little catch when working.

  An attachment hole 28 through which the connecting portion 15 can be inserted is formed in the central portion of the bottom surface portion of the receiving portion 27.

  A plurality of concave portions 29 are formed in the opening edge portion of the upper portion of the receiving portion 27, and when the frame portion 13 and the receiving portion 27 are installed in a concentric position above the receiving portion 27, the support member 21 of the frame portion 13 is It is provided in the recess 29 of the receiving portion 27 so as to be fitted.

  Then, the mesh portion 12 is installed on the upper portion of the frame portion 13 at a position concentric with the frame portion 13, and the frame portion 13 is installed on the upper portion of the receiving portion 27 at a position concentric with the receiving portion 27 to support the frame portion 13. 21 with the second male screw portion 24 of the connecting portion 15 fitted into the concave portion 29 of the receiving portion 27, the opening portion 18 of the mesh portion 12, the frame portion side connecting member 20 of the frame portion 13, and the receiving portion 27. The first nut 30 and the second nut are inserted into the second male screw portion 24 from the vertical direction on the bottom surface portion side of the receiving portion 27 and the frame portion side connecting member 20 side of the frame portion 13. 31 is screwed and clamped to the second male screw portion 24 by the first nut 30 and the second nut 31, and the frame portion 13 and the receiving portion 27 are fixed to the other of the connecting portions 15. .

  Here, the longitudinal direction in the planar direction of the positioning portion 25 of the connecting portion 15 corresponds to the orientation of the support member 21 of the frame portion 13, and coincides with one of the plurality of support members 21. .

  Next, the structure which fixes the connection part 15 to the ceiling finishing material 3 is demonstrated. On the upper surface of the place where the ceiling fall prevention tool 11 of the ceiling finishing material 3 is installed, a recumbent member 32 made of a section steel having a substantially C-shaped cross section is installed.

  A second penetrating portion 33 communicating with the first penetrating portion 14 of the ceiling finishing material 3 is formed on the bottom surface portion of the recumbent member 32.

  Then, the first male screw portion 23 of the connecting portion 15 is inserted through the first through portion 14 and the second through portion 33, and the bottom surface of the horizontal member 32 is inserted into the first male screw portion 23 of the connecting portion 15. A third nut 34 is screwed from above the part so that one of the connecting parts 15 is fixed to the ceiling finishing material 3 and the reed member 32.

  In addition, one of the connecting portions 15 is connected via a connecting means (not shown) that connects the ceiling side connecting member 35 detachably provided to the first male screw portion 23 and the ceiling slab 6 of the ceiling back C or the like. It has a structure.

  The ceiling-side connecting member 35 includes a female screw portion 37 that can be screwed into the first male screw portion 23 inside a metal cylindrical member, and an annular portion 38 at the upper portion of the cylindrical member.

  The connecting means (not shown) is made of a wire member. Then, one of the connecting means is connected to a mounting bracket (not shown) attached to the ceiling slab 6, other structures such as a ceiling base material or a ceiling reinforcing material of the ceiling back C (not shown), and the other of the connecting means. Are connected to the annular portion 38 of the ceiling side connecting member 35.

  In addition, a configuration for forming the ceiling fall prevention structure together with the ceiling fall prevention tool 11 of the present embodiment will be described.

  The field edge member 2 includes two types of field edge members 39 having different widths H1 and H2 in the short direction (Y direction in the figure) which is a direction orthogonal to the longitudinal direction (X direction in the figure) and the horizontal direction. There are a wide first field member 39 having a large width and a narrow second field member 40 having a small width. Here, the width H1 of the first field edge member 39 is set to be approximately twice as large as the width H2 of the second field edge member 40.

  The field edge mounting bracket 41 has a cross section of the first field edge side groove 43 of the first field edge member 39 at the lower part of a metal body 42 made of a thin metal plate such as stainless steel or aluminum formed in a square shape. A cross-sectional view of a first field edge mounting portion 45 that can be engaged with a first field edge side edge 44 formed by being folded back into a substantially J-shape, and a second field edge side groove portion 46 of the second field edge member 40. A second field edge mounting part 48 that can be engaged with a second field edge side edge 47 formed by folding back into a J shape, and a female screw part 49 made of a nut provided in the central part of the metal fitting body 42 are provided. ing. Here, the female screw portion 49 may be one in which a screw groove is screwed into a through portion 50 formed in the metal fitting main body 42 in addition to a nut.

  The first field edge mounting portion 45 is raised downward substantially parallel to a pair of opposite end portions 51, 51 of the metal fitting body 42, and is inserted into the first field edge side groove portion 43 of the first field edge member 39. A pair of possible first raised portions 52, 52 and the tips of the first raised portions 52, 52 are bent outwardly so as to be separated from each other to have a substantially J-shaped cross section. A first edge member 39 is provided on the inner surface of the edge side edge portion 44 so as to be engageable along the longitudinal direction (X direction in the drawing), and holds the first field edge member 39 slidably along the first field edge side groove portion 43. One locking portion 53 is provided.

  The second field mounting portion 48 is raised between the first raised portions 52, 52 of the metal fitting body 42 in a downward direction substantially parallel to the first raised portion 52, and the first raised portion A pair of second rising portions 54, 54 that can be inserted into the second field-side groove 46, and are formed at an interval M2 that is narrower than the interval M1 between 52, 52, and each second rising portion 54, The tip of 54 is bent outward so as to be separated from each other, and is provided on the inner surface of the second field edge 47 so that it can be engaged along the longitudinal direction (X direction in the figure). A second locking portion 55 that holds the member 40 slidably along the second field-side groove 46 is provided.

  Here, each of the first rising portions 52, 52 is formed so as to be inclined so as to approach each other from the proximal end on the metal fitting body 42 side to the distal end on the first locking portion 53 side. Similarly, the two raised portions 54 and 54 are also formed to be inclined so that the distance from each other approaches from the proximal end on the metal fitting body 42 side to the distal end on the second locking portions 55 and 55 side.

  The field edge connection member 56 connects the fall prevention metal fitting for the suspension bolt 7 or the field edge receiving member 9 and the field edge attachment metal 41, a connection member main body 57 made of a wire rope, and a connection member main body. A male screw part 58 made of a bolt that is provided at one end of 57 and can be screwed to the female screw part 49, and an annular part 59 provided at the other end of the connecting member main body 57 are provided.

  Reference numeral 60 denotes a connecting rod member that is fixed on the field edge fitting 41 and connects the plurality of field edge members 2, 39, and 40.

  The connecting rod member 60 is formed by bending a metal plate material into an L shape, and is provided with a plurality of elongated through holes 61 on each of the orthogonal sides.

  The connecting rod member 60 straddles the installation position of the ceiling fall prevention device 11 of the recumbent member 32 installed substantially parallel to the field edge members 2, 39, 40 between the plurality of field edge members 2, 39, 40. It is erected.

  The connecting rod member 60 is fixed to the field edge members 2, 39 and 40 by being attached to the field edge mounting bracket 41 via the through hole 61 by the male screw part 58.

  In addition, the connecting portion 15 of the ceiling fall prevention tool 11 is screwed into the connecting portion 15 from the first male screw portion 23 side while being inserted into the through hole 61 of the connecting rod member 60. The connecting portion 15 is fixed to the connecting rod member 60. A ceiling side connecting member 35 is attached to the first male screw portion 23 of the connecting portion 15.

  Reference numeral 62 denotes a clip fitting for connecting the field edge members 2, 39 and 40 and the field edge receiving member 9. The clip metal fitting 62 is formed in a bowl shape, a field edge receiving side locking portion 63 that comes into contact with the upper surface portion and the side surface portion of the field edge receiving member 9 and can be locked to the field edge receiving member 9, and a field edge receiving side engagement The lower edge of the stopper 63 is formed in a hook shape, and can be locked to the edge edge grooves 5, 43, 46 of the edge members 2, 39, 40 by hook-like portions on both sides of the hook portion. And 64.

  Reference numeral 65 denotes a connection fitting that prevents the connection between the field edge members 2, 39, and 40 and the field edge receiving member 9 by the clip metal fitting 62.

  The connecting metal fitting 65 is formed by bending a metal plate member, and includes an upper surface portion 66, and a lower surface provided with a front surface portion 67 and a rear surface portion 68 that extend downward from a pair of opposed pieces of the upper surface portion 66. A U-shaped covering portion 69 with the opening opened, a first connecting bracket side locking portion 71 provided on one extending portion 70 with the lower end of the front surface portion 67 extending forward, and a lower end of the rear surface portion 68 rearward And a second connecting-fitting-side locking portion 73 provided in the other extending portion 72 that extends to the other side.

  On the upper surface portion of the covering portion 69, a connecting metal side female screw portion 74 is provided, and the front surface portion 67 and the rear surface portion 68 are each provided with a through portion 75 for screwing.

  The connecting metal side female screw portion 74 is formed by forming a cylindrical flange portion 74A by burring and providing a screw groove on the inner surface of the flange portion 74A. The flange portion 74A is upward as shown in FIG. Even if it is projecting, it may be projecting downward as shown in FIG.

  The first connection fitting side locking portion 71 is provided with respect to the pair of first connection fitting side rising portions 76 that can be inserted into the field edge side groove portions 5, 43, 46 of the field edge members 2, 39, 40. The tip of the first connecting bracket side rising portion 76 is bent outward so as to be separated from each other, and formed into a substantially J-shaped cross section, and longitudinally (in the figure, the X direction) on the inner surfaces of the field side edge portions 44 and 47 The field edge members 2, 39, 40 are provided so as to be slidable along the field edge side grooves 5, 43, 46.

  The second connecting bracket side latching portion 73 is different from the pair of second connecting bracket side rising portions 79 that can be inserted into the field edge side groove portions 5, 43, 46 of the field edge members 2, 39, 40. The leading end of the second connecting bracket side rising portion 79 is bent outward so that the distance from each other is increased, and is formed into a substantially J-shaped cross section, and the longitudinal direction (X direction in the figure) on the inner surfaces of the field side edge portions 44 and 47 The field edge members 2, 39, 40 are provided so as to be slidable along the field edge side grooves 5, 43, 46.

  It should be noted that both the first connecting bracket side locking portion 71 and the second connecting bracket side locking portion 73 are spaced from the covering portion 69 by a predetermined distance L to one extending portion 70 and the other extending portion 72. It is provided.

  Note that the first connecting bracket side locking portion 71 and the second connecting bracket side locking portion 73 are directly connected to one extending portion 70 and the other extension from the covering portion 69 as shown in FIGS. It may be provided with the installation portion 72.

  Further, as the connecting metal fitting 65, the first and second field edge members 39 and 40 can be engaged with the first field edge side groove part 43 and the second field edge side groove part 46, respectively. 14 to 16, a narrow type in which the width of the covering portion 69, one extending portion 70, and the other extending portion 72 is formed to be narrow corresponding to the first field side groove portion 43, As shown in FIG. 17 to FIG. 19, each of the wide portion formed so that the width of the covering portion 69, one extending portion 70, and the other extending portion 72 corresponds to the second field side groove portion 46 is formed. I have prepared it.

  Next, the effect of the above configuration will be described. First, a method of installing the ceiling fall prevention tool 11 on the existing ceiling surface 4 will be described. A first through portion 14 is formed in advance at a predetermined location on the ceiling finishing material 3. The number of first through portions 14 formed in the ceiling finishing material 3 is the ceiling base material such as the ceiling finishing material 3 and the field edge member 2 and the field edge receiving member 9 that form the ceiling together with the ceiling finishing material 3. The ceiling surface can be changed according to the weight of the ceiling with various functional materials such as heat insulating materials, sound absorbing materials, shielding materials such as lead plates that shield radiation, etc. if desired. In order to increase the number of ceiling fall prevention tools 11 holding 4, a plurality of ceiling fall prevention tools 11 are installed on the ceiling finishing material 3 as shown in FIG.

  Next, as shown in FIG. 8, the frame portion 13 and the receiving portion 27 are fixed to the connecting portion 15 in advance on the floor surface of the room R from the ceiling back C through the first penetration portion 14 of the ceiling finishing material 3. The wire member W is lowered to the ceiling fall prevention tool 11 prepared in the state, and the wire member W is connected to one string passage part 26 of the connecting part 15 of the ceiling fall prevention tool 11.

  The wire member W connected to the ceiling fall prevention tool 11 is pulled up, and the ceiling fall prevention tool 11 is raised to the ceiling surface 4.

  Further, the wire member W is pulled up until the mesh portion 12 contacts the lower surface of the ceiling finishing material 3, and one of the connecting portions 15 is connected to the first penetration portion 14 of the ceiling finishing material 3 and the second penetration of the recumbent member 32. The third nut 34 is screwed into the first male screw portion 23 of the connecting portion 15 through the portion 33, and one of the connecting portions 15 is fixed to the ceiling finishing material 3.

  Here, when one of the connecting portions 15 is fixed to the ceiling finishing material 3, the direction of the frame portion 13 is set to the joint of the ceiling finishing material 3 or the frame of the other ceiling fall prevention tool 11 via the positioning portion 25. It is installed in line with the direction of part 13.

  Subsequently, the wire member W is removed from the stringing portion 26, and the connecting rod member 60 is installed between the field members 2 in a state where one of the connecting portions 15 is inserted into the through hole 61 of the connecting rod member 60.

  A fourth nut 60A is screwed into the first male screw portion 23 of the connecting portion 15 inserted through the through hole 61 of the connecting rod member 60, and the connecting portion 15 is fixed to the connecting rod member 60. At the same time, the ceiling side connecting member 35 is screwed into the first male screw portion 23 of the connecting portion 15.

  Further, the annular portion 38 of the ceiling side connecting member 35 is provided with a mounting bracket (not shown) attached to the ceiling slab 6 via other connecting means (not shown) such as a wire member, or other ceiling base material of the ceiling back C (not shown) Connected to structures such as ceiling reinforcement.

  Further, the connecting collar member 60 on the field edge member 2 is placed on the field edge mounting bracket 41 attached to the field edge member 2, and is connected to the male edge of the field edge connection member 56 through the through hole 61. It is fixed to the field mounting bracket 41 by the screw part 58. Further, the annular portion 59 of the field edge connecting member 56 is connected to the field edge receiving member 9.

  Next, a method of installing the ceiling fall prevention tool 11 on the newly installed ceiling surface 4 will be described.

  First, as shown in FIG. 9, the ceiling fall prevention device 11 is previously disassembled into a net part 12, a frame part 13, a connecting part 15, and a receiving part 27, and the connecting part 15 is a first part of the ceiling finishing material 3. And is fixed to the ceiling finishing material 3 with the second male screw portion 24 protruding below the ceiling finishing material 3. Here, a ceiling-side connecting member 35 is attached to the first male screw portion 23 of the connecting portion 15, and the annular portion 38 of the ceiling-side connecting member 35 is attached to the ceiling slab 6 through connecting means (not shown). It is connected to a mounting bracket (not shown) or a structure such as a ceiling base material or a ceiling reinforcing material of the ceiling back C (not shown).

  Subsequently, the first nut 30 is screwed into the second male screw portion 24 of the connecting portion 15, and the net portion 12, the frame portion 13, and the receiving portion 27 are installed in this order on the second male screw portion 24. After the direction of the frame portion 13 is aligned with the joint of the ceiling finishing material 3 and the direction of the frame portion 13 of the other ceiling fall prevention device 11, the second nut 31 is screwed into the second male screw portion 24. To do.

  As described above, by installing the ceiling fall prevention device 11 below the ceiling surface 4, the ceiling finishing material 3 dropped from the field edge member 2 is the net portion of the ceiling fall prevention device 11 fixed to the ceiling back C side. Since it is held in contact with 12, the ceiling finishing material 3 dropped from the field edge member 2 is prevented from falling to the floor surface. The structure of the ceiling back C such as the field edge member 2 and the field edge receiving member 9 falling together with the ceiling finishing material 3 is also prevented from falling to the floor surface by the ceiling finishing material 3 held by the ceiling fall prevention tool 11. .

  As a method of using the connection fitting 65, the clip fitting 62 connecting the field edge member 2 and the field edge receiving member 9 is covered with the connection metal 65 from above, and the covering portion 69 receives the field edge reception. The side engaging portion 63 is covered, and the first connecting bracket side engaging portion 71 and the second connecting bracket side engaging portion 73 are engaged with the field edge portions 44 and 47.

  Subsequently, the bolt B is screwed into the connecting metal side female screw portion 74 of the connecting metal 65, and from the state where the tip of the shaft portion of the bolt B is in contact with the upper part of the field edge receiving side locking portion 63, the bolt B When the connecting bracket 65 is raised relative to the clip bracket 62 by rotating in the mounting direction, the first connecting bracket side locking portion 71 and the second connecting bracket side locking portion 73 and the edge side edge The engaged state with the parts 44 and 47 becomes strong. Thereafter, a pierce screw (not shown) is driven into the connecting fitting 65 through the screw-through penetrating portion 75, and the connecting fitting 65 is fixed to the clip fitting 62 and the field edge receiving member 9. By using the connecting member 65 in this way, even in the connection portion between the field edge member and the field edge receiving member using a conventionally known clip, the connection between the field edge member and the field edge receiving member is made strong. It is possible to prevent the field edge member from being detached from the field edge receiving member.

  Here, both the first connection fitting side locking portion 71 and the second connection fitting side locking portion 73 are spaced from the covering portion 69 by a predetermined distance L, and one extension portion 70 and the other extension portion 72. Since the field edge side locking portion 64 of the clip metal fitting 62 and the field edge side edges 44 and 47 are engaged with each other, the field edge side groove 5 is located around the covering portion 69 where it is difficult to elastically expand. In order to engage the first connection fitting side locking portion 71 and the second connection fitting side locking portion 73 with the field edge portions 44 and 47, the connection fitting 65 is easily attached to the field member 2. Making it possible.

  A connecting member 65A for a connecting metal fitting shown in FIG. 23 connects the drop preventing metal fitting for the suspension bolt 7, the edge receiving member 9 and the like to the connecting metal fitting 65, and a connecting member main body 65B made of a wire rope. A male screw portion 65C made of a bolt that is provided at one end of the connecting member main body 65B and can be screwed to the connecting metal fitting-side female screw portion 74, and an annular portion 65D provided at the other end of the connecting member main body 65B.

  The male screw part 65C of the connecting member 65A for the connecting metal fitting, in which the annular part 65D is fastened to the connecting metal side female screw part 74 and fastened to the wire engaging hole, the edge receiving member 9 or the like, is screwed. The respective field edge members 2, 39, 40 are connected to the drop prevention metal fittings for the suspension bolt 7, the field edge receiving member 9 and the like via the connection metal fitting 65. As a result, the hanger 11 and the mounting bracket are damaged by the shaking of the earthquake and the like, and the ceiling finishing material 3 is detached from the ceiling together with the lattice body 10, or the field edge members 2, 39, 40 are detached from the field edge receiving member 9. However, it is possible to prevent the ceiling finishing material 3 from falling.

  24 and 25, an elastic member 65E such as sponge or rubber is disposed between the upper surface portion 66 of the connecting metal fitting 65 and the upper surface portion of the clip metal fitting 62, whereby the elasticity of the elastic member 65E. When the connection fitting 65 is raised relative to the clip fitting 62 by the restoring force, the first connection fitting side locking portion 71, the second connection fitting side locking portion 73, and the field edge side edges 44, 47 Thus, the engagement state of the edge mounting bracket 12 can be prevented from rattling. Here, the vertical dimension of the elastic member 65E is preferably larger than the distance between the upper surface portion 66 of the connecting metal fitting 65 and the upper surface portion of the clip metal fitting 62. Further, when the elastic member 65E is used, the elastic member 65E alone can be used without using the bolt B.

  The connecting bracket 65 of this embodiment can also connect the field edge members 2, 39, 40 and the field edge receiving member 9 with the connection bracket 65 alone without using the clip metal fitting 62. Construction costs can be reduced in terms of structure.

  Further, as shown in FIGS. 26 and 27, as another embodiment of the connection fitting 65, one extending portion 70 and the other extension portion 72 of the connection fitting 65 are respectively provided with protrusions extending outward in the X direction. An installation portion 65F is provided. A fixing portion 65G formed by bending both ends of the protruding portion 65F downward is provided. An attachment hole 65L into which the screw member 65H can be inserted may be formed in the fixing portion 65G. Then, as shown in FIGS. 28 and 29, the fixing portion 65G and the side surface portions of the field edge members 2, 39, 40 are fixed via the screw member 65H, so that the connection fitting 65 and the field edge members 2, 39 are fixed. , 40 is firmly fixed. In this way, each field edge member 2, 39, 40 and the connection fitting 65 are firmly fixed, so that each field edge member 2, 39, 40 is connected at an inclined ceiling or the like installed with an inclination. The metal fitting 65 is prevented from sliding along the marginal side groove. Further, even when the ceiling is heavy due to the weight of the ceiling finishing material 3 or other equipment, the connecting brackets are used when the field edge members 2, 39, 40 are suspended and held via the connecting member 65A. Corresponding to the load applied to 65, the connection fitting 65 can be prevented from being detached from the respective field edge members 2, 39, 40, and the field edge members 2, 39, 40 can be prevented from dropping. Furthermore, when there are various facilities between the ceiling slab and the ceiling finishing material 3 and these facilities and the suspension bolts 7 are obstructed, the number of connecting brackets 65 to be attached to the respective edge members 2, 39, 40 is reduced. In this case, the connection fitting 65 corresponds to the load applied to the connection fitting 65 when the field edge members 2, 39, 40 are suspended and held via the connection member 65A for the connection fitting. It is possible to prevent the field members 2, 39, 40 from falling by preventing them from being detached from 40.

  When attaching the field edge mounting bracket 41 to the first field edge member 39, the first rising portion 52 is inserted into the first field edge side groove 43 of the first field edge member 39, so The stop portion 53 is engaged with the inner surface of the first field edge side edge portion 44 along the longitudinal direction (X direction in the drawing) of the first field edge member 39, so that the first field edge member 39 is the first. It is slidably held along the edge-side groove 43 of the.

  When the field edge mounting bracket 41 is attached to the second field edge member 40, the second raised portion 54 is inserted into the second field edge side groove 46 of the second field edge member 40, and the second Is engaged with the inner surface of the second field edge side edge 47 along the longitudinal direction (X direction in the figure) of the second field edge member 40, so that the second field edge member 40 is engaged. The second rim side groove 46 is slidably held.

  Then, the annular portion 38 is constrained to the wire engaging hole, the field edge receiving member 9 or the like on the female thread portion 49 of the field edge mounting bracket 41 attached to the first field edge member 39 or the second field edge member 40. The male screw portion 58 of the field edge connecting member 56 that is attached and locked is screwed, and the field edge members 2, 39, and 40 and the fall prevention metal fittings for the suspension bolts 7 are connected via the field edge fitting 41. And the field edge receiving member 9 and the like. As a result, the hanger 8 and the mounting bracket are damaged due to shaking such as an earthquake, and the ceiling finishing material 3 is detached from the ceiling together with the lattice body 10, or the field edge members 2, 39, 40 are detached from the field edge receiving member 9. However, it is possible to prevent the ceiling finishing material 3 from falling.

  As described above, in this embodiment, the net part 12 installed below the ceiling surface 4 composed of a plurality of ceiling finishing materials 3, the frame part 13 holding the net part 12, and the ceiling finishing material 3 And a connecting portion 15 that is inserted into the first through portion 14 as the through portion formed in the upper portion and fixed to the ceiling back C and the other is fixed to the frame portion 13. The ceiling surface 4 is held from below by the portion 12 to prevent the ceiling surface 4 from falling, and it is easy to install on the ceiling surface 4 regardless of whether it is a new installation or an existing installation without forming a scaffold with respect to the existing ceiling surface. In addition, the ceiling fall prevention tool 11 having an excellent appearance can be provided.

  Further, the mesh portion 12 has a shape that can be installed in the ceiling finishing material 3, so that the ceiling finishing material 3, the field edge member 2 that forms the ceiling together with the ceiling finishing material 3, and the field edge receiver. Ceilings installed on the ceiling surface 4 according to the weight of the ceiling such as ceiling materials such as members 9 and various functional materials such as heat insulating materials used as desired, sound absorbing materials, shielding materials such as lead plates for shielding radiation, etc. It is possible to construct an appropriate fall prevention structure corresponding to the weight of the ceiling by changing the number of fall prevention tools 11.

  Further, a second male screw portion 24 is provided as a male screw portion on the other side of the connecting portion 15, and a receiving portion 27 for holding the frame portion 13 is provided, and the other of the connecting portions 15 is connected to the receiving portion 27. The frame 13 and the connecting portion 15 are fixed by screwing the first nut 30 as a nut into the second male screw portion 24 in a state of being inserted into the mounting hole 28 provided in As a result, the frame portion 13 and the connecting portion 15 are fixed by the second male screw portion 24 and the first nut 30, so that the frame portion 13 and the connecting portion 15 can be attached and detached. On the other hand, when retrofitting the ceiling fall prevention tool 11 of the present invention, the connecting portion 15 is installed in the ceiling finishing material 3 in advance, and then the connecting portion 15 and the frame portion 13 are fixed below the ceiling surface 4. Workability is improved.

  In addition, since the positioning portion 25 corresponding to the orientation of the frame portion 13 is provided on the one of the connecting portions 15, the positioning portion 25 grasps the orientation of the frame portion 13 below the ceiling surface 4 from the ceiling back C side. By doing so, it is possible to facilitate the work of aligning the directions of the frame portions 13 when installing a plurality of ceiling fall prevention devices 11, and to prevent the appearance of the ceiling surface 4 from being damaged.

  Further, the one of the connecting portions 15 is provided with a string passing portion 26 into which a wire member W as a string member can be inserted, and the wire member W inserted into the string passing portion 26 is passed through the ceiling surface 4 from below. The ceiling drop prevention device 11 is lifted to the ceiling back C through the first through portion 14 as the above, and the ceiling fall prevention device 11 is provided so that it can be lifted. The lifting work is facilitated and workability is improved.

  In addition, a first male screw portion 23 as a male screw portion is provided on the one side of the connecting portion 15, and a ceiling side connecting member 35 having a female screw portion 37 is attached to the first male screw portion 23. Since the annular portion 38 provided in the ceiling side connection member 35 is fixed to the ceiling back C through connection means (not shown), the ceiling fall prevention device 11 can be easily fixed to the ceiling back C. .

  Furthermore, the net part 12 has a net part 17 stretched on a net part side frame member 16 that can be placed on the frame part 13, so that the net part 12 and the frame part 13 are separate, Exchange of the net part 12 is facilitated.

  Further, as a mesh part 12 installed below a ceiling surface 4 composed of a plurality of ceiling finishing materials 3, a frame part 13 for holding the mesh part 12, and a penetration part formed in the ceiling finishing material 3 The ceiling surface using the ceiling fall prevention tool 11 provided with a connecting portion 15 that is inserted into the first through portion 14 and fixed to the ceiling back C and the other to the frame portion 13. 4 is a ceiling fall prevention method for preventing the fall of 4, the one of the connecting parts 15 is provided with a string passing part 26 into which a wire member W as a string member can be inserted, and is inserted into the string passing part 26. The wire member W is pulled up from the lower side of the ceiling surface 4 to the ceiling back C via the first penetrating portion 14, and the ceiling fall prevention device 11 installed on the floor surface is pulled up, and then the connection By fixing one of the parts 15 to the ceiling back C, the ceiling surface 4 is retained from below by the mesh part 12. It prevents the ceiling surface 4 from falling, and it can be easily installed on the existing ceiling surface 4 by working from the ceiling back C without forming a scaffold with respect to the existing ceiling surface 4 and has an excellent appearance. The ceiling fall prevention tool 11 can be provided.

  Furthermore, as a net part 12 installed below the ceiling surface 4 composed of a plurality of ceiling finishing materials 3, a frame part 13 for holding the net part 12, and a penetration part formed in the ceiling finishing material 3 The ceiling surface using the ceiling fall prevention tool 11 provided with a connecting portion 15 that is inserted into the first through portion 14 and fixed to the ceiling back C and the other to the frame portion 13. 4 is a ceiling fall prevention method for preventing the fall of 4, wherein one of the connecting portions 15 is fixed to the ceiling back C, and is exposed to the other of the connecting portions 15 exposed below the ceiling surface 4 from the penetrating portion. By fixing the frame portion 13 together with the mesh portion 12 from below the ceiling surface 4, the ceiling surface 4 is held from below by the mesh portion 12 to prevent the ceiling surface 4 from falling, and a newly built building It is possible to provide a ceiling fall prevention device 11 that is easy to install on the ceiling surface 4 and has an excellent appearance. That.

  Next, FIG. 30 shows the second embodiment, and the same parts as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the present embodiment, the split pin 81 is inserted into a penetrating portion that is formed through the other tip of the connecting portion 15 in the radial direction of the connecting portion 15, and the first nut 30 is dropped from the connecting portion 15. And a cup-shaped cover member 82 is attached to a portion exposed below the bottom surface of the other receiving portion 27 of the connecting portion 15 to prevent the first nut 30 from falling off, and the connecting portion The appearance of the ceiling fall prevention tool 11 is improved by concealing 15 from the outside.

  Next, FIG. 31 shows a third embodiment of the present invention. In this figure, the same parts as those in FIGS. 1 to 30 are denoted by the same reference numerals, and detailed description of the common parts is omitted. In the present embodiment, the support member 21 described in the first embodiment is used as a first support member, and the mesh portion 12 of the present embodiment is a frame between the first support member 21 and the plurality of first support members 21. A second part comprising a plurality of linear wire rods made of metal and arranged radially from the central portion of the part side frame member 19 to connect the frame part side frame member 19, the frame part side connecting member 20 and the intermediate frame member 22; Support member 83.

  As described above, in the present embodiment, the mesh portion 12 is composed of the first support member 21 and the second support member 83 made of a plurality of wire rods laid on the frame portion 13 in a mesh shape, Since the frame portion 13 is integrated, it is easy to attach the ceiling fall prevention tool 11.

  Next, FIG. 32 shows a fourth embodiment of the present invention. In this figure, the same parts as those in FIGS. 1 to 31 are denoted by the same reference numerals, and detailed description of the common parts is omitted. The mesh portion 12 of this embodiment is a mesh member 84 directly stretched on the frame portion side frame member 19, the support member 21, the intermediate frame member 22, and the frame portion 13 made of wire.

  As described above, the mesh portion 12 is composed of the mesh member 84 stretched on the frame portion 13, so that the mesh portion 12 and the frame portion 13 are integrated, so that the installation work of the ceiling fall prevention tool 11 is performed. Becomes easy.

  Next, FIGS. 33 and 34 show a fifth embodiment of the present invention. In this figure, the same parts as those in FIGS. 1 to 32 are denoted by the same reference numerals, and detailed description of the common parts is omitted. In this embodiment, the surface of the frame side frame member 19, the support member 21, the intermediate frame member 22, the second support member 83, the net side frame member 16 and other wires is covered with a wire sound absorbing material 85. In addition, the surface of the sound absorbing material for wire 85 is covered with a cover member 86. In addition, a plurality of through portions 87 are formed on the bottom surface of the receiving portion 27, and a sound absorbing material 88 for receiving portion is built in the receiving portion 27.

  Examples of the sound absorbing materials 85 and 88 of the present embodiment include polyurethane foam, rubber / rubber sponge, polyethylene foam, foam cushioning material, felt, cork, and the like. It can be changed.

  Examples of the cover member 86 include a net material, a non-woven fabric, and a mesh material. However, the cover member 86 can be appropriately changed as long as it has flexibility and allows sound from the outside to pass through the sound absorbing material.

  As described above, by covering the surface of the frame portion 13 with the wire sound absorbing material 85, the frame portion 13 prevents the sound near the ceiling surface 4 from being reflected. The fall of the ceiling surface 4 can be prevented without impairing the acoustic performance.

  Further, by covering the surface of the wire sound absorbing material 85 with the cover member 86, the wire sound absorbing material 85 on the surface of the frame portion 13 can be prevented from falling off.

  Further, the receiving portion 27 has a built-in sound absorbing material for receiving portion 88, and the receiving portion 27 is provided with a plurality of through portions 87 for communicating the sound absorbing material for receiving portion 88 and the outside. Thus, the sound near the ceiling surface 4 can be prevented from being reflected, and even in a facility having excellent acoustic performance, the ceiling surface 4 can be prevented from falling without impairing the acoustic performance.

  Next, FIGS. 35 to 39 show a sixth embodiment of the present invention. In this figure, the same parts as those in FIGS. 1 to 34 are denoted by the same reference numerals, and detailed description of the common parts is omitted.

  In the present embodiment, the cover member 90 that covers the ceiling fall prevention device 11 of each of the above embodiments will be described by taking the ceiling fall prevention device 11 described in the first embodiment as an example.

  The cover member 90 of the present embodiment is formed by forming a substantially U-shaped frame member having a top surface portion 91A, a vertical piece portion 91B, and a bottom surface portion 91C into an annular shape having a substantially rectangular shape in plan view. A cover side frame member 91 that can accommodate the mesh part 12, the frame part 13, and the receiving part 27, and a cover side erection member 92 made of a metal plate material laid on a pair of opposing top surface parts 91A of the cover side frame member 91. And a cover-side finishing member 93 that is placed on the bottom surface portion 91C of the cover-side frame member 91 and can be accommodated inside the cover-side frame member 91. The cover-side finishing member 93 has the same shape slightly smaller than the planar shape of the cover-side frame member 91, and is formed larger than the opening formed by the bottom surface portion 91C below the cover-side frame member 91. Therefore, the cover-side finishing member 93 housed in the cover-side frame member 91 is provided so as to be exposed from the opening portion below the cover-side frame member 91.

  The cover-side frame member 91 and the cover-side erection member 92 are made of non-ferrous metal such as aluminum, and the cover-side finishing member 93 is a thin plate member made of a lightweight material such as plastic, glass cloth material, non-ferrous metal such as aluminum, The overall weight of the cover member 90 is reduced.

  Further, the cover-side installation member 92 is provided with a cover-side mounting hole 94 as a through portion through which the connecting portion 15 of the ceiling fall prevention tool 11 can be inserted.

  The cover member 90 in this embodiment is provided with a plurality of ceiling fall prevention devices 11 that can be covered simultaneously (in this embodiment, two ceiling fall prevention devices 11 can be covered at the same time). The ceiling fall prevention device 11 is formed in a planar shape that can be accommodated at the same time, and the plurality of cover side erection members 92 are arranged at positions corresponding to the plurality of ceiling fall prevention devices 11 accommodated in the cover side frame member 91. Each is built. The cover member 90 may cover only one ceiling fall prevention tool 11.

  Further, as a structure for concealing the gap between the adjacent cover members 90, 90, the two adjacent top surface portions 91A or bottom surface portions 91C (the top surface portion 91A in the figure) of the cover side frame member 91 project horizontally outward. A cover portion 95 made of a protruding piece is provided, and this cover portion 95 is vertically overlapped with the top surface portion 91A or the bottom surface portion 91C of the adjacent cover member 90 to cover the gap between the adjacent cover members 90, 90. ing.

  Here, a method of installing the ceiling fall prevention tool 11 covered with the cover member 90 of the present embodiment on the ceiling surface 4 will be described. As shown in FIG. 29, the frame 13 and the receiving portion 27 are prepared in a state where the frame portion 13 and the receiving portion 27 are fixed to the floor surface of the room R in advance from the ceiling back C through the first through portion 14 of the ceiling finishing material 3. The wire member W is lowered to the ceiling fall prevention tool 11 and the wire member W is connected to one string passage part 26 of the connecting part 15 of the ceiling fall prevention tool 11 covered with the cover member 90.

  In the ceiling fall prevention tool 11 covered with the cover member 90, the net part 12, the frame part 13 and the receiving part 27 of the ceiling fall prevention tool 11 are accommodated inside the cover side frame member 91 of the cover member 90. . Further, the cover side finishing member 93 of the cover member 90 is placed on the bottom surface portion 91 </ b> C of the cover side frame member 90. Further, the connecting portion 15 is inserted into the cover side mounting hole 94 of the cover member 90.

  Then, the wire member W connected to the ceiling fall prevention tool 11 is pulled up, and the ceiling fall prevention tool 11 covered with the cover member 90 is raised to the ceiling surface 4.

  Further, the wire member W is pulled up until the top surface portion 91 </ b> A of the cover side frame member 91 and the cover side erection member 92 abut against the lower surface of the ceiling finishing material 3, and one end of the connecting portion 15 is passed through the first of the ceiling finishing material 3. The first nut 30 is screwed into the first male screw portion 23 of the connecting portion 15 so that one of the connecting portions 15 is finished in the ceiling. Fix to material 3.

  Here, when one of the connecting portions 15 is fixed to the ceiling finishing material 3, the direction of the frame portion 13 is set to the joint of the ceiling finishing material 3 or the frame of the other ceiling fall prevention tool 11 via the positioning portion 25. It is installed in line with the direction of part 13.

  Subsequently, the wire member W is removed from the stringing portion 26, and the connecting rod member 60 is installed between the field members 2 in a state where one of the connecting portions 15 is inserted into the through hole 61 of the connecting rod member 60.

  A fourth nut 60A is screwed into the first male screw portion 23 of the connecting portion 15 inserted through the through hole 61 of the connecting rod member 60, and the connecting portion 15 is fixed to the connecting rod member 60. At the same time, the ceiling side connecting member 35 is screwed into the first male screw portion 23 of the connecting portion 15.

  Further, the annular portion 38 of the ceiling side connecting member 35 is provided with a mounting bracket (not shown) attached to the ceiling slab 6 via other connecting means (not shown) such as a wire member, or other ceiling base material of the ceiling back C (not shown) Connected to structures such as ceiling reinforcement.

  As described above, since the ceiling fall prevention device 11 is concealed from the ceiling surface 4 by covering the ceiling fall prevention device 11 with the cover member 90, the ceiling surface can be obtained without impairing the appearance of the ceiling surface 4. 4 fall prevention structures can be constructed.

  Further, by covering the gap between the adjacent cover members 90 and 90 with the cover portion 95, it is possible to prevent the appearance of the ceiling surface 4 from being impaired by the joint between the adjacent cover members 90 and 90. Furthermore, the ceiling fall prevention device 11 covered with the cover member 90 can be easily installed on the ceiling surface 4 regardless of whether it is newly installed or existing, without forming a scaffold with respect to the existing ceiling surface.

  In addition, the cover member 90 accommodates the net part 12, the frame part 13, and the receiving part 27 of the ceiling fall prevention device 11 inside the cover side frame part 91, and the ceiling side drop into the cover side mounting hole 94 of the cover side erection member 92. Since the connecting part 15 of the prevention tool 11 is inserted into the ceiling fall prevention tool 11, it is easy to attach the cover member 90 to the ceiling fall prevention tool 11 without the need for screws or screw members.

  Further, since the cover-side finishing member 93 is placed on the bottom surface portion 91C of the cover-side frame member 91 and accommodated inside the cover-side frame member 91, the cover-side frame member does not require screws or screw members. Installation to 91 is easy and the possibility of falling off the cover side frame member 91 is reduced.

  Next, FIGS. 40 to 42 show a seventh embodiment of the present invention. In this figure, the same parts as those in FIGS. 1 to 39 are denoted by the same reference numerals, and detailed description of the common parts is omitted.

  The net member 100 of this embodiment is stretched between a plurality of rail members 101 arranged in parallel to each other at the lower part of the ceiling finishing material 3.

  The rail member 101 includes a concave groove portion 102 formed along the longitudinal direction of the rail member 101 on the upper surface portion, and the lower surface portion is formed flat.

  The interval P1 of the opening edge portion 103 of the recessed groove portion 102 is formed to have a size that is greater than the diameter of the shaft portion 105 of the bolt 104 and less than the diameter of the head portion 106 of the bolt 104. Further, the interval P1 is formed smaller than the width Q on the opening side of the mounting bracket 147 made of steel having a substantially U-shaped cross section. A screw hole 148 formed by burring is provided on the surface of the mounting bracket 147 on the closing side.

  In addition, a part of the opening edge portion 103 of the concave groove portion 102 is formed with a bolt mounting opening 107 having a space larger than the diameter of the head portion 106 of the bolt 104.

  Further, it is assumed that the inner width of the concave groove 102 is larger than the diameter of the head 106 of the bolt 104 or larger than the width Q of the mounting bracket 147.

  The operational effects of the above configuration will be described. As shown in FIG. 40, the mounting bracket 147 is engaged with the recessed groove portion 102 of the rail member 101, and the male screw member 146 is screwed into the screw hole 148 of the mounting bracket 147. Then, the male screw member 146 is attached to the rail member 101. The mesh member 140 is inserted into the male screw member 146 attached to the rail member 101, and the mesh member 100 is attached to the male screw member 146.

  Thus, in the rail member 101 in which the net member 100 is attached to the upper part and the ceiling finishing material 3 is attached to the lower part, the male screw member 146 is inserted through the first through part 14 and the second through part 33, A nut 108 is screwed onto the male screw member 146 from above the bottom surface of the horizontal member 32 to fix the male screw member 146 to the ceiling finishing material 3 and the horizontal member 32.

  Also, as shown in FIG. 41, the head portion 106 of the bolt 104 is inserted into the concave groove portion 102 from the bolt mounting opening 107, and the head portion 106 of the bolt 104 is locked to the opening edge portion 103 of the concave groove portion 102. Then, the bolt 104 is attached to the rail member 101.

  The mesh member 100 is inserted into the shaft portion 105 of the bolt 104 attached to the rail member 101, and the mesh member 100 is attached to the bolt 104. Further, the ceiling finishing material 3 is attached to the lower surface of the rail member 101 with screws 108A or the like. Note that lower portions of the plurality of ceiling fall prevention devices are connected by a rail member 101.

  In this way, the rail member 101 having the mesh member 100 attached to the upper portion and the ceiling finishing material 3 attached to the lower portion is inserted into the first penetrating portion 14 and the second penetrating portion 33 through the shaft portion 105 of the bolt 104. The nut 104 is screwed onto the shaft portion 105 of the bolt 104 from above the bottom surface of the horizontal member 32, and the bolt 104 is fixed to the ceiling finishing material 3 and the horizontal member 32.

  A net member 100 as a net part installed below the ceiling surface 4 composed of a plurality of ceiling finish materials 3, a rail member 101 for holding the net part 12, and a penetration formed in the ceiling finish material 3 And a bolt 104 that is fixed to the ceiling back C and fixed to the rail member 101 on the other side. To prevent the ceiling surface 4 from falling, and it is easy to install on the ceiling surface 4 regardless of whether it is a new installation or an existing ceiling surface, and has an excellent appearance. The fall prevention tool 11 can be provided.

  Further, since the ceiling finishing material 3 is arranged below the mesh member 100 to form a new ceiling surface 4, the mesh member 100 and the rail member 101 are covered with the ceiling finishing material 3 and concealed when viewed from the room R side. Therefore, the fall prevention structure for the ceiling surface 4 can be constructed without impairing the beauty of the ceiling surface 4.

  Next, FIGS. 43 to 45 show an eighth embodiment of the present invention. In the figure, the same parts as those in FIGS. 1 to 42 are denoted by the same reference numerals, and detailed description of the common parts is omitted.

  The net member 110 according to the present embodiment is stretched between a plurality of rail members 111 arranged in parallel to each other below the ceiling finishing material 3.

  The rail member 111 includes an upper concave groove portion 112 formed along the longitudinal direction of the rail member 111 on the upper surface portion, and a first lower side provided side by side along the longitudinal direction of the rail member 111 on the lower surface portion. A concave groove 113 and a second lower concave groove 114 are provided.

  The intervals P2, P3, P4 of the opening edge portions 115, 116, 117 of the upper concave groove portion 112, the first lower concave groove portion 113, and the second lower concave groove portion 114 are the shaft portions 121 of the bolts 118, 119, 120. , 122, 123 and larger than the diameter of the heads 124, 125, 126 of the bolts 118, 119, 120. The intervals P2, P3, and P4 are formed smaller than the width Q on the opening side of the mounting bracket 147.

  A part of the opening edge portion 115 of the upper concave groove portion 112 is formed with a bolt mounting opening (not shown) having a space larger than the diameter of the head portion 124 of the bolt 118. Preferably it is.

  Further, the width inside the upper concave groove portion 112, the first lower concave groove portion 113 and the second lower concave groove portion 114 is larger than the diameter of the heads 124, 125, 126 of the bolts 118, 119, 120, Alternatively, it is assumed that it is formed larger than the width Q of the mounting bracket 147.

  The operational effects of the above configuration will be described. As shown in FIG. 43, the mounting bracket 147 is engaged with the upper concave groove 112 of the rail member 111, and the male screw member 146 is screwed into the screw hole 148 of the mounting bracket 147. Then, the male screw member 146 is attached to the rail member 111.

  The mesh member 110 is inserted into the male screw member 146 attached to the rail member 111, and the mesh member 110 is attached to the male screw member 146. Further, on the lower surface portion of the rail member 111, the mounting bracket 147 is engaged with the first lower groove portion 113 and the second lower groove portion 114, respectively, and the male screw member 146 is inserted into the screw hole 148 of the mounting bracket 147. Then, the male screw member 146 is also attached to the lower surface portion of the rail member 111. A ceiling finishing material 129 is attached to the first lower groove portion 113 and the second lower groove portion 114 via the male screw member 146 and nuts 127 and 128. Note that lower portions of the plurality of ceiling fall prevention devices are connected by a rail member 141.

  Thus, the male screw member 146 is inserted into the first through portion 14 and the second through portion 33 through the rail member 111 having the net member 110 attached to the upper portion and the ceiling finishing material 129 attached to the lower portion. A nut 130 is screwed onto the screw member 146 from above the bottom surface portion of the horizontal member 32 to fix the male screw member 146 to the ceiling finishing material 3 and the horizontal member 32.

  As shown in FIG. 44, the head portion 124 of the bolt 118 is inserted into the upper concave groove portion 112 from the bolt mounting opening (not shown), and the head portion 124 of the bolt 118 is inserted into the opening edge of the upper concave groove portion 112. The bolt 118 is attached to the rail member 111 while being locked to the portion 115.

  The mesh member 110 is inserted into the shaft portion 121 of the bolt 118 attached to the rail member 111, and the mesh member 110 is attached to the bolt 118. Further, on the lower surface portion of the rail member 111, a ceiling finishing material 129 is attached to the first lower groove portion 114 and the second lower groove portion 114 via bolts 119, 120 and nuts 127, 128. Note that lower portions of the plurality of ceiling fall prevention devices are connected by a rail member 141.

  Thus, the rail member 111 having the mesh member 110 attached to the upper portion and the ceiling finishing material 129 attached to the lower portion is inserted into the first penetrating portion 14 and the second penetrating portion 33 through the shaft portion 121 of the bolt 118. The nut 118 is screwed onto the shaft portion 121 of the bolt 118 from above the bottom surface of the horizontal member 32 to fix the bolt 118 to the ceiling finishing material 3 and the horizontal member 32.

  A mesh member 110 as a mesh portion installed below the ceiling surface 4 composed of a plurality of ceiling finish materials 3, a rail member 111 that holds the mesh portion 12, and a penetration formed in the ceiling finish material 3 And a bolt 118 that is fixed to the ceiling back C and fixed to the rail member 111 on the other side. To prevent the ceiling surface 4 from falling, and it is easy to install on the ceiling surface 4 regardless of whether it is a new installation or an existing ceiling surface, and has an excellent appearance. The fall prevention tool 11 can be provided.

  In addition, since the ceiling finishing material 129 is arranged below the mesh member 110 to constitute the ceiling surface 4, the mesh member 110 and the rail member 111 are covered with the ceiling finishing material 129 and concealed when viewed from the room R side. Therefore, the fall prevention structure of the ceiling surface 4 can be constructed without impairing the beauty of the ceiling surface 4.

  46 and 47 show a ninth embodiment of the present invention. In the figure, the same parts as those shown in FIGS.

  The mesh member 140 of this embodiment is stretched between a plurality of rail members 141 arranged in parallel to each other at the lower part of the ceiling finishing material 3.

  The rail member 141 includes an upper concave groove portion 142 formed along the longitudinal direction of the rail member 141 on the upper surface portion, and a lower concave groove portion 143 formed along the longitudinal direction of the rail member 141 on the lower surface portion. I have.

  The intervals P4 and P5 between the opening edge portions 144 and 145 of the upper concave groove portion 142 and the lower concave groove portion 143 are larger than the diameter of the male screw member 146, and the mounting bracket 147 made of a steel plate having a substantially U-shaped cross section. It is formed smaller than the width Q on the opening side. A screw hole 148 formed by burring is provided on the surface of the mounting bracket 147 on the closing side.

  Flange portions 149 and 150 extending in the horizontal direction are formed on both sides of the lower surface portion of the rail member 141.

  The operational effects of the above configuration will be described. The mounting bracket 147 is engaged with the upper concave groove portion 142 of the rail member 141, the male screw member 146 is screwed into the screw hole 148 of the mounting bracket 147, and the rail member 141 is engaged. A male screw member 146 is attached. The mesh member 140 is inserted into the male screw member 146 attached to the rail member 141, and the mesh member 140 is attached to the male screw member 146.

  In addition, the ceiling finishing material 151 is attached to the flange portions 149 and 150 of the rail member 141 with screws 152 or the like. Note that lower portions of the plurality of ceiling fall prevention devices are connected by a rail member 111.

  Thus, in the rail member 141 in which the mesh member 140 is attached to the upper part and the ceiling finishing material 151 is attached to the lower part, the male screw member 146 is inserted through the first through part 14 and the second through part 33, A nut 153 is screwed onto the male screw member 146 from above the bottom surface of the horizontal member 32 so that the male screw member 146 is fixed to the ceiling finishing material 3 and the horizontal member 32.

  A mesh member 140 as a mesh portion installed below the ceiling surface 4 composed of a plurality of ceiling finish materials 3, a rail member 141 that holds the mesh portion 12, and a penetration formed in the ceiling finish material 3 And a male screw member 146 that is fixed to the ceiling back C and fixed to the rail member 141 on the other side. The surface 4 is held from below to prevent the ceiling surface 4 from falling, and it is easy to install on the ceiling surface 4 regardless of whether it is new or existing, without having to build a scaffolding on the existing ceiling surface, and has an excellent appearance. A ceiling fall prevention device can be provided.

  Further, since the ceiling finishing material 151 is disposed below the mesh member 140 to form the new ceiling surface 4, the mesh member 140 and the rail member 141 are covered with the ceiling finishing material 151 and concealed when viewed from the room R side. Therefore, the fall prevention structure for the ceiling surface 4 can be constructed without impairing the beauty of the ceiling surface 4.

  Next, FIGS. 48 to 51 show a tenth embodiment of the present invention. In this figure, the same parts as those shown in FIGS.

  In the present embodiment, the above-described rail member 141 is used to form a ceiling base material such as a T-bar having a substantially inverted T-shaped cross section obtained by bending a well-known steel plate material or an aluminum extruded profile. A new ceiling structure is constructed in place of the ceiling structure (see FIG. 1 of Japanese Utility Model Publication No. 62-194814) arranged in a lattice.

  The ceiling finishing material 3 is placed between the plurality of rail members 141 by placing the ceiling finishing material 3 on the flange portions 149, 150 of the plurality of rail members 141 suspended from the ceiling slab 6 via the wire members 160. It is built in.

  One of the wire members 160 is provided with a first bolt 161 that can be screwed into the screw hole 148 of the mounting bracket 147, and the other screw of the wire member 160 is installed in the ceiling slab 6 by insert molding or the like. A second bolt 163 that can be screwed onto the member 162 is provided.

  Then, the mounting bracket 147 is engaged with the lower concave groove 143, the male screw member 146 is screwed into the screw hole 148 of the mounting bracket 147, and the male screw member 146 is mounted on the lower surface portion of the rail member 141. . The sheet member 165 is inserted into the male screw member 146 attached to the lower surface portion of the rail member 141, and the sheet member 165 is attached to the rail member 141 via the male screw member 146 and the nut 166. In this way, the membrane ceiling 167 by the sheet member 165 is laid on the lower surface portion of the rail member 141. Here, the sheet member 165 is made of a material such as resin or cloth and is a sheet material.

  Further, as shown in FIG. 49, the ceiling finishing material 3 may be installed below the flange portions 149 and 150, and the flange portions 149 and 150 and the ceiling finishing material 3 may be fixed by screws or the like.

  Further, as shown in FIG. 50, also in the ceiling structure shown in FIG. 49, the ceiling finishing material 3 is fixed to the lower portions of the flange portions 149 and 150 with screws or the like so that the lower concave groove portion 143 is exposed. The membrane ceiling 167 made of the sheet member 165 may be laid on the lower surface portion of the rail member 141 in the same manner as in FIG.

  Further, as shown in FIG. 51, the film ceiling 167 made of the sheet member 165 may be laid on the lower surface portion of the rail member 141 via the lower groove portion 143 without installing the ceiling finishing material 3 on the rail member 141. Shall.

  Since the rail member 141 itself is excellent in strength by using the rail member 141 for the ceiling base material as described above, the ceiling is compared with a ceiling structure in which a conventional T-bar is assembled in a lattice shape as a ceiling base material. The deformation of the lattice portion in the state in which the base material is assembled is also suppressed, and the ceiling finishing material 3 can be prevented from falling off the ceiling base material.

  Further, as shown in FIGS. 48, 50, and 51, the mounting bracket 147 is engaged with the lower concave groove 143 of the rail member 141, and the male screw member 146 and the nut 166 attached to the mounting bracket 147 are used. The membrane ceiling can be easily constructed by attaching the sheet member 165 to the lower surface portion of the rail member and laying the membrane ceiling.

  Next, FIGS. 52 to 58 show an eleventh embodiment of the present invention. In this figure, the same parts as those shown in FIGS.

  In the present embodiment, an example is shown in which a ceiling fall prevention device is applied to a ceiling structure (see FIG. 1 of Japanese Utility Model Publication No. 62-194814) in which ceiling base materials 170 such as known T bars are arranged in a grid pattern.

  Here, in the ceiling structure of this embodiment, a ceiling base material 170 such as a T-bar suspended from the ceiling slab 6 via a wire member 171 is assembled in a lattice shape, and the ceiling finish material is attached to the lattice-like ceiling base material. Is built.

  A ceiling base material 170 such as a T-bar according to the present embodiment is formed by bending a steel plate material, an aluminum extruded shape, or the like into a substantially inverted T-shaped cross section, and is extended vertically. A vertical piece 172 and a flange-shaped horizontal piece 173 extending in the horizontal direction from the lower portion of the vertical piece 172 are provided.

  The upper end of the vertical piece 172 is provided with a head 175 formed by connecting a pair of upper ridges 174, 174 extending upward and parallel to each other in the forked direction. A ceiling finishing material 3 is placed on the upper surface of the horizontal piece 173.

  Reference numeral 176 denotes a mounting bracket that connects the wire member 171 and the ceiling base material. The mounting bracket 176 includes an upper surface portion 178 having screw holes 177, a hanging portion 179 extending downward from a rear end portion of the upper surface portion 178, and left and right sides of the hanging portion 179 having upper portions connected to the left and right sides. A grip portion 182 including a pair of locking pieces 180 and 181 and a pressing portion 185 including a pair of left and right pressing pieces 183 and 184 connected to the front end portion of the upper surface portion 178 are provided.

  The locking pieces 180 and 181 are provided with hook-shaped locking portions 186 and 187 formed by folding the lower portions upward.

  The holding pieces 183 and 184 are arranged inside the locking pieces 180 and 181, and the locking pieces 180 and 181 and the holding pieces 183 and 184 are further provided with the locking pieces 180 and 181 and the holding pieces 183 and 184, respectively. Communicating through portions 188, 189, 190, and 191 are formed, respectively. The interval between the pressing pieces 183 and 184 is provided to be equal to or larger than the width of the head 175 of the ceiling base material 170.

  As described above, since the upper portions of the locking pieces 180 and 181 and the pressing pieces 183 and 184 are connected to the hanging portion 179 and the upper surface portion 178, the lower portions thereof are pivoted about the hanging portion 179 and the upper surface portion 178, respectively. As shown in FIG. Accordingly, the locking pieces 180 and 181 and the holding pieces 183 and 184 have a structure in which the respective lower portions are easily opened outwardly. The head 175 of the ceiling base material 170 can be easily accommodated in 176.

  Then, in a state where the head 175 of the ceiling base material 170 is accommodated in the mounting bracket 176, when the nut 193 is screwed and fastened to the bolt 192 inserted through each of the through portions 188, 189, 190, 191, Since the interval between the locking pieces 180 and 181 is narrowed and the locking portions 186 and 187 are locked to the lower portion of the upper protrusion 174, the head 175 of the ceiling base material 170 is securely held by the mounting bracket 176.

  Further, substantially rectangular cutout portions 195 and 196 into which the horizontal member 194 made of a hollow steel pipe having a rectangular cross section can be inserted are formed on the upper portions of the locking pieces 180 and 181. In addition, equipment equipment (not shown) of the ceiling back C such as a sprinkler head is attached to the recumbent member 194 via a metal fitting (not shown).

  One of the wire members 171 is provided with a first bolt 197 that can be screwed into the screw hole 177 of the mounting bracket 176, and the other screw of the wire member 171 is installed on the ceiling slab 6 by insert molding or the like. A second bolt 199 that can be screwed onto the member 198 is provided.

  The hanging portion 179 is provided with a large-diameter hole 200 and a small-diameter hole 201. The upper surface portion 178 and the hanging portion 179 are formed with a groove 202 that communicates the large-diameter hole 200 and the small-diameter hole 201. ing.

  And, as a connecting means different from the wire member 171 described above, a wire member 203 provided with a disc-shaped retaining portion 203 formed on one side smaller in diameter than the large diameter hole 200 and larger in diameter than the small diameter hole 201, The other end of the wire member 203 is fixed to a predetermined portion of the ceiling C, the retaining portion 203 is passed through the large-diameter hole 200, the wire member 203 is passed from the groove to the small-diameter hole 201, and the retaining portion 203 is The ceiling base material 170 can be suspended and held on a predetermined portion via the wire member 203 by being engaged with the hole 201.

  Explaining the operational effects of the above configuration, the head of the bolt 205 is inserted into the concave groove 102 from the bolt mounting opening, the head of the bolt 205 is locked to the opening edge portion 103 of the concave groove 102, The bolt 205 is attached to the rail member 101. Then, the net portion 12 and the frame portion 13 are attached to the shaft portion of the bolt 205, and the shaft portion of the bolt 205 is attached to the first penetration portion 14 of the ceiling finishing material 3 and the second penetration portion 33 of the recumbent member 32. When the nut 205 is screwed into the bolt 205 and the bolt 205 is fixed to the ceiling finishing material 3, the ceiling fall prevention tool 11 is installed below the ceiling surface 4.

  Thus, since the ceiling finishing material 3 dropped from the field edge member 2 is held in contact with the net 12 of the ceiling fall prevention tool 11 fixed to the ceiling back C side, the ceiling dropped from the field edge member 2 is retained. The finishing material 3 is prevented from falling to the floor surface. The structure of the ceiling back C such as the field edge member 2 and the field edge receiving member 9 falling together with the ceiling finishing material 3 is also prevented from falling to the floor surface by the ceiling finishing material 3 held by the ceiling fall prevention tool 11. .

  In addition, when the first bolt 197 is screwed into the screw hole 177 with the horizontal member 194 inserted through the notches 195 and 196, the upper surface portion of the horizontal member 194 is caused by the shaft portion of the first bolt 197. Is pressed. Thus, when the head 175 of the ceiling base material 170 is pressed downward by the lower surface portion of the recumbent member 194, the head 175 of the ceiling base material 170 is pressed against the locking portions 186 and 187, and the ceiling base material 170 The engagement between the head 175 and the locking portions 186 and 187 of the mounting bracket 176 becomes strong.

  The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the shape of the frame part side frame member 19 and the mesh part side frame member 16 is not limited to a circular shape, and can be appropriately changed to a polygonal shape such as a triangle or a quadrangle, a star shape, or a combination of these shapes. is there. Further, the frame side frame member 19, the support member 21, the intermediate frame member 22, the second support member 83, the net side frame member 16 and other wire rods of each embodiment are formed from a metal wire such as iron. However, stainless steel wires may be used for buildings such as food factories where hygienic performance is also required.

3 Ceiling finishing material 4 Ceiling surface
11 Ceiling drop prevention device
12 Net
13 Frame
14 First penetration
15 Connecting part
24 Second male screw
25 Positioning part
26 Stringing section
30 First nut
35 Ceiling side connecting members
37 Female thread
38 Annulus
85 Sound absorbing material
86 Cover material
87 penetration
88 Sound absorbing material

Claims (14)

A net installed below a ceiling surface composed of a plurality of ceiling finishing materials;
A frame portion for holding the mesh portion;
A ceiling fall prevention device comprising: a penetrating portion formed in the ceiling finishing material; and one connecting portion fixed to the back of the ceiling and the other fixed to the frame portion. The ceiling drop prevention device according to claim 1, wherein a plurality of the net portions have a shape that can be installed on the ceiling finishing material. While providing a male screw part on the other side of the connecting part,
A receiving portion for holding the frame,
The frame portion and the connecting portion are fixed by screwing a nut into the male screw portion in a state where the other of the connecting portions is inserted into an attachment hole provided in the receiving portion. The ceiling fall prevention tool according to claim 1 or 2, characterized by the above-mentioned. The ceiling fall prevention tool according to any one of claims 1 to 3, wherein a positioning portion corresponding to the direction of the frame portion is provided on the one of the connecting portions. A string passage part capable of inserting a string member into the one of the connecting parts;
The said string member inserted in the said string passage part was pulled up to the said ceiling back via the penetration part from the lower part of the ceiling surface, The said fall prevention tool was equipped with it so that pulling up was possible. The ceiling fall prevention tool of any one of these. While having a male screw portion on the one of the connecting portions,
A ceiling side connecting member having a female screw part is attached to the male screw part,
The ceiling fall prevention tool according to any one of claims 1 to 5, wherein an annular portion provided in the ceiling side connecting member is fixed to the back of the ceiling through a connecting means. The ceiling fall prevention tool according to any one of claims 1 to 6, wherein a surface of the frame portion is covered with a sound absorbing material. The ceiling fall prevention tool according to claim 7, wherein a surface of the sound absorbing material is covered with a cover member. The ceiling fall prevention tool according to claim 3, wherein a sound absorbing material is incorporated in the receiving portion, and the receiving portion is provided with a plurality of through portions that allow the sound absorbing material to communicate with the outside. 10. The ceiling fall prevention device according to claim 1, wherein the mesh part is a net part member stretched on a mesh part side frame member that can be placed on the frame part. . The ceiling drop prevention tool according to any one of claims 1 to 9, wherein the mesh part is composed of a plurality of wire members laid in a net shape on the frame part. The ceiling drop prevention device according to any one of claims 1 to 9, wherein the mesh portion is made of a mesh member stretched on the frame portion. A net installed below a ceiling surface composed of a plurality of ceiling finishing materials;
A frame portion for holding the mesh portion;
Using the ceiling fall prevention device provided with a connecting part that is inserted into a through-hole formed in the ceiling finishing material and one side is fixed to the ceiling and the other side is fixed to the frame part. It is a ceiling fall prevention method to prevent falling,
The one of the connecting portions is provided with a string passage portion through which a string member can be inserted,
After the string member inserted into the string passage part is pulled up from the lower part of the ceiling surface to the ceiling through the penetration part, the ceiling fall prevention device installed on the floor surface is pulled up, and then the connection One of the parts is fixed to the back of the ceiling. A net installed below a ceiling surface composed of a plurality of ceiling finishing materials;
A frame portion for holding the mesh portion;
Using the ceiling fall prevention device provided with a connecting part that is inserted into a through-hole formed in the ceiling finishing material and one side is fixed to the ceiling and the other side is fixed to the frame part. It is a ceiling fall prevention method to prevent falling,
One of the connecting portions is fixed to the back of the ceiling, and the frame portion is fixed together with the mesh portion from the lower portion of the ceiling surface to the other of the connecting portions exposed from the through portion to the lower portion of the ceiling surface. A ceiling fall prevention method characterized by

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