JP7496135B2 - Ceiling frame hanging structure - Google Patents

Description

The present invention relates to a ceiling frame suspension structure that suspends a ceiling frame from the structural body of a building, and more specifically, to a ceiling frame suspension structure that suspends a ceiling frame via a ceiling frame suspension member from a horizontal member for mounting the ceiling frame on a specified ceiling base that is suspended from the structural body of a building.

A ceiling frame suspension structure is well known in which a conventional ceiling frame is suspended via a ceiling frame suspension member (vertical member) from a horizontal member (horizontal reinforcement member) for mounting the ceiling frame in a specified ceiling substructure (such as a steel grape trellis) suspended from the building structure (such as H-shaped steel).

A conventional ceiling frame is made up of, for example, multiple rafters made of channel steel and multiple rafter supports, also made of channel steel, to which the rafters are attached. The rafters and rafter supports are arranged in a lattice pattern, and the upper and lower intersecting parts of the rafters and rafter supports are interconnected with specified metal fittings to form an integrated structure.

On the other hand, the multiple horizontal members on the ceiling base from which such a ceiling frame is suspended are formed from shaped steel such as channel steel, and are suspended and supported at a predetermined height by multiple hanging members corresponding to the height (depth) of the ceiling from H-shaped steel, which is the structural member of the building.

The ceiling frame is suspended from the horizontal members via multiple suspension bolts, which serve as the suspension members.

Each of the multiple hanging bolts is made of a rod member of a specified length, with a hook member at its upper end that engages with the horizontal member, and a U-shaped hanger member at its lower end that engages with the lower part of the soffit support. These are then used to hang the hanging bolt by engaging its lower end with the soffit support and its upper end with the horizontal member (see, for example, the configuration of Patent Document 1).

However, in the case of a hanging structure in which the ceiling frame is hung from a horizontal member using such hanging bolts with a rod shaft structure and mounting brackets with a hook structure and hanger structure, the strength of the hanging bolts themselves, the connection strength between the horizontal member and the hanging bolts, and the connection strength between the hanging bolts and the siding supports are low, resulting in a lack of earthquake resistance when the ceiling frame is hung.

The excitation forces during an earthquake include vertical vibrations caused by vertical shaking, and horizontal vibrations caused by lateral shaking, and in reality, these vibrations are combined in a more complex way. Therefore, the suspension bolts and upper and lower mounting brackets are subjected to horizontal loads in addition to vertical loads, and are required to have sufficient seismic resistance to loads in both directions.

However, such demands cannot be met with the suspension bolt of the rod shaft structure alone or with the mounting hardware of the hook and hanger structures, and there is a risk that the suspension bolt portion will bend and the hook and hanger portions will come loose.

Therefore, in conventional configurations, it was necessary to install brace materials to deal with the above-mentioned lateral shaking, and to take measures to secure the hook and hanger parts.

In order to solve these problems, the inventors of the present application have developed a ceiling frame suspension structure that significantly improves the strength and earthquake resistance of the ceiling frame suspension section by constructing the ceiling frame suspension member from shaped steel or square steel pipes of a specified cross-sectional shape and specified outer diameter, thereby effectively expanding the cross-sectional area and improving the strength against vertical compressive and tensile loads, the rigidity in the direction perpendicular to the axis, and the strength in the horizontal direction. The upper end of the ceiling frame suspension member made of shaped steel or square steel pipes of the specified cross-sectional shape and specified outer diameter is connected to a horizontal member (horizontal reinforcement member) for mounting the ceiling frame on the building side via a specified mounting bracket, and the lower end is connected to the ceiling frame via a specified connecting bracket. (See, for example, the configuration of Patent Document 2.)

Next, we will provide an overview of the configuration of one of these embodiments.

Figures 38 to 42 show the ceiling frame suspension structure (attachment structure to the horizontal reinforcement material on the ceiling substrate side) relating to embodiment 12 of the invention of the same application.

(Basic ceiling structure)
In this embodiment, as shown in Figures 38 to 42, for example, H-shaped steel 10, 10... having a pair of horizontal left and right mounting edges 10a, 10a are used as the structural body on the underside of the upper floor of the building from which a lattice-shaped ceiling frame made of rafters and rafter supports is suspended. A plurality of vertical members (reinforcement member suspension members) 20, 20... made of square steel pipes with a predetermined outer diameter are attached to the mounting edges 10a, 10a of the H-shaped steel 10, 10... in the XY direction and the Y direction in the XY direction, made of lip channel steel with a predetermined outer diameter, are attached to the mounting edges 10a, 10a of the H-shaped steel 10, 10... via a plurality of vertical members (reinforcement member suspension members) 20, 20... made of square steel pipes with a predetermined outer diameter. By suspending and supporting the horizontal reinforcement members (horizontal reinforcement members) 3, 3..., 3, 3..., a ceiling base with a grape trellis structure is constructed, which serves as the basis for attaching the ceiling frame.A lattice-shaped ceiling frame (not shown) consisting of rafters and rafter supports is suspended in a stable manner with good earthquake resistance from the multiple horizontal reinforcement members 3, 3..., 3, 3... in the XY directions of this basic ceiling base, via multiple ceiling frame suspension members 4, 4... made of square steel pipes with a specified outer diameter, as shown in Figure 41, for example.

The length of the vertical members (reinforcement hanging members) 20, 20... of the ceiling base, which are the basic members that suspend and support the horizontal reinforcements 3, 3..., 3, 3... for mounting the ceiling frame, is formed to a dimension that corresponds to the height (depth) of the ceiling of the building, for example, and brace members 29, 29... made of square steel pipes with specified external dimensions are inserted and connected diagonally between them, providing high earthquake resistance against lateral shaking of the horizontal reinforcements 3, 3..., 3, 3... in the XY directions.

Various structures can be considered for the square steel pipes for the vertical members 20, 20... intended to improve seismic strength, but in the case of this embodiment, for example, as shown in Figure 39, a metal plate of a specified thickness is bent into a square or rectangular cross section, and both side edges 20a, 20b are joined together in an S-shape at one side of the corner, and a bent rib 20c is provided on the inside of the adjacent part of one side edge to fix the joining part (connecting part) A, forming a crimped structure that is integrated into a square tube shape. A similar structure is also used for the square steel pipes for the brace material 29.

(Regarding the mounting structure of the vertical members 20, 20... to the mounting edge portions 10a, 10a... of the H-shaped steels 10, 10... at the upper ends)
The upper ends of the vertical members 20, 20... are firmly attached to the mounting edges 10a, 10a... of the H-shaped steel 10, 10... by using vertical member mounting brackets 21 and auxiliary brackets 22 as shown in Figure 40.

This vertical member mounting bracket 21 is composed of a mounting bracket body in the shape of a square box (a rectangular parallelepiped shape with the entire front side opening in a U-shape horizontally forward) with a bottom wall surface (abutment surface) that abuts in a stable seating state corresponding to the cross-sectional area and cross-sectional shape of the upper end of the vertical member 20 made of the square cross-section steel pipe described above, fitting openings 21a, 21a with a U-shaped cross section of a predetermined depth in the front-to-rear direction that open on the front side of the mounting bracket body (the mounting edge portion 10a side of the H-shaped steel 10 described above), and a fastening bolt 24 located on the upper wall side of the front-to-rear center of the fitting openings 21a, 21a, which is provided from above to below and is inserted and screwed from above to below during mounting, and which fixes the mounting bracket body from above to the mounting edge portion 10a of the H-shaped steel 10 described above.

The fitting openings 21a, 21a are formed by cutting a predetermined depth rearward on both side walls of the front opening of the mounting bracket body. In this embodiment, the fitting openings 21a, 21a are provided in approximately the front half of the mounting bracket body in the front-to-rear direction when viewed from the side.

On the other hand, the bottom wall portion is almost entirely in contact with the upper end of the vertical member 20, and in this contact state, the upper end of the vertical member 20 is firmly connected and integrated with the bolts 27 via the connecting bracket 21b, which has arc-shaped connecting pieces on both the left and right sides of the bottom.

In this configuration, the vertical members 20 are made of rectangular steel pipes with a square cross section, and the vertical member mounting brackets 21 are also configured in a rectangular box shape, and they are connected together at the top and bottom to form a single rectangular member structure. The upper end vertical member mounting brackets 21 are then firmly attached to the mounting edge 10a of the H-shaped steel 10.

That is, when suspending the vertical member 20, the above-mentioned U-shaped fitting openings 21a, 21a of the above-mentioned rectangular box-shaped vertical member mounting bracket body are fitted into the mounting edge 10a on the front side of the H-shaped steel 10, the above-mentioned fastening bolt 24 is inserted and screwed downward in the perpendicular direction, the tip of the fastening bolt 24 presses down the upper side of the mounting edge 10a of the H-shaped steel 10, and the upper surface of the lower side of the above-mentioned fitting openings 21a, 21a and the lower surface of the mounting edge 10a of the H-shaped steel 10 are joined and fastened together with each other via the tip of the fastening bolt 24, thereby reliably fixing over a wide rectangular area.

In this way, when the main body of the vertical member mounting bracket 21 is configured as a box with a predetermined width in the front-to-back and left-to-right directions, and has U-shaped fitting openings 21a, 21a with a predetermined depth on both sides, and is fitted (joined) to the mounting edge 10a of the H-shaped steel 10, the joint surface of the mounting part is much wider than in the case of the conventional hook structure, engagement with a hanger structure, or a hanging structure on a rod axis, and the deformation rigidity of the vertical member 20 in the direction perpendicular to the axis is increased, and the supporting force against vertical loads is also much greater.

In addition to the above configuration, in this embodiment, an auxiliary bracket 22 of approximately the same structure is also provided on the other mounting edge portion 10a of the corresponding H-shaped steel 10.

As shown in FIG. 40, this auxiliary metal fitting 22 is also composed of a rectangular box-shaped (rectangular parallelepiped shape with the entire front side open) auxiliary metal fitting body, a U-shaped cross-section fitting opening of a predetermined depth in the front-rear direction that opens on the front side of the rectangular box-shaped auxiliary metal fitting body (the side of the mounting edge 10a of the H-shaped steel 10), and a fastening bolt located on the upper wall surface of the center of the front-rear direction of the U-shaped cross-section fitting opening, which is inserted from the top to the bottom during installation and is screwed from the top to the bottom to fix the rectangular box-shaped auxiliary metal fitting body to the mounting edge 10a on the other side of the H-shaped steel 10. The U-shaped cross-section fitting opening is formed by cutting a predetermined depth rearward on both side walls on the left and right sides of the front side opening of the auxiliary metal fitting body.

The vertical member mounting bracket 21 and the auxiliary bracket 22 are connected in a tensioned state by two connecting rods 23, 23 on the left and right, each equipped with a bolt head 25, 25 and a nut portion 25a, 25a, with their respective fitting openings facing each other in the same horizontal plane.

Therefore, in the connected and fixed state of FIG. 40, the vertical member mounting brackets 21, 21... at the top ends of the vertical members 20, 20... that suspend the horizontal reinforcement members 3, 3..., 3, 3... (and the ceiling frame) of FIG. 38 are securely pulled and fixed in the fitting direction by the auxiliary brackets 22, 22, so that even if an external force acts on the vertical member mounting brackets 21 in the non-fitting direction, they will not come off, and since they are fitted and fixed in the opposite direction at two points on both ends of the H-shaped steel mounting edges 10a, 10a, the fitting state itself becomes even stronger. As a result, the vertical members 20, 20... themselves are less likely to sway sideways, and the earthquake resistance of the ceiling substrate side (the hanging side of the horizontal reinforcement members 3, 3...) from which the ceiling frame is suspended is greatly improved.

(Regarding the mounting structure of the lower ends of the vertical members 20, 20... to the horizontal reinforcing members 3, 3..., 3, 3...)
In this embodiment, as described above, the upper ends of the multiple vertical members 20, 20... are attached to the mounting edges 10a, 10a of the H-shaped steel 10 using the vertical member mounting brackets 21 and auxiliary brackets 22. However, on the other hand, on the lower ends, different mounting structures 18a, 18b, 18c are used at predetermined intervals between the horizontal reinforcement members 3, 3... in the X direction (for example, every two vertical members 20, 20...) (for details, see the description in Patent Document 2).

The horizontal reinforcements 3, 3..., 3, 3... in the XY directions that intersect with each other are also connected and fixed to each other using fasteners 17, 17... as necessary at intersections other than the attachment points to the vertical members 20, 20... (for details, see the description in Patent Document 2).

As a result, each horizontal reinforcement member 3, 3..., 3, 3... in the XY direction to which the ceiling frame is attached is supported by the H-shaped steel 10, 10... on the building side with sufficient seismic resistance.

(Regarding the mounting structure of the ceiling frame to the horizontal reinforcement members 3, 3..., 3, 3... in the XY direction)
In the case of Patent Document 2, of the horizontal reinforcement members 3, 3..., 3, 3... in the X and Y directions that are supported with high seismic resistance as described above, as an example, as shown in Figure 41, the horizontal reinforcement member 3, 3... in the X direction is selected, and the above-mentioned ceiling frame is attached by using square steel pipes having the structure shown in Figure 39 as the ceiling frame hanging members 4, 4....

Figure 41 shows the structure for suspending the ceiling frame from a horizontal reinforcement 3 made of lip channel steel, i.e., the attachment structure of the upper end of the ceiling frame suspension member 4 to the horizontal reinforcement 3. When attaching the upper end of the ceiling frame suspension member 4 to this horizontal reinforcement 3, a ceiling frame suspension member attachment fitting (hereinafter simply referred to as the attachment fitting) 11 shown in Figure 42 is used (the configuration of embodiment 12 shown in Figures 44 to 46 of Patent Document 2).

As shown in FIG. 42, this mounting bracket 11 is made up of a first fitting portion 111 of a cylindrical structure that fits into the upper part of the upper end of the ceiling frame hanging member 4 that extends vertically, a second fitting portion 112 of a cylindrical structure that fits into the lower part of the upper end of the ceiling frame hanging member 4 that extends vertically, and a third fitting portion 113 of a semi-cylindrical structure (hat-shaped) that is located between the first and second fitting portions 111 and 112 and fits into the horizontal reinforcement member 3 in the X direction. Each of these fitting portions 111, 112, and 113 is formed into a cylindrical structure with a square cross section and a semi-cylindrical structure with a hat cross section by bending a high-strength metal plate of a specified thickness, width, and length, and these are welded together as shown in FIG. 42 to form a mounting bracket of a single structure.

The first and second fitting parts 111, 112 are short cylinders with a rectangular C-shaped cross section that corresponds to the cross-sectional shape and outer diameter dimensions of the ceiling frame hanging material 4, and rib walls (folded walls) 111b, 111b, 112b, 112b for butting are provided on both the left and right sides of the opening (butting part).

In addition, in the center of the three wall portions excluding the opening side (butt side), insertion holes 111c, 111c, 111c are provided for inserting drill screws (or tapping screws) 16, 16.... The upper end side of the ceiling frame hanging material 4 is inserted in a slidable state into the first and second fitting portions 111, 112, and after adjusting the height in the vertical direction (leveling), the drill screws (or tapping screws) 16, 16... are inserted and screwed in, and fastened and fixed as shown in FIG. 41.

The third fitting portion 113 is a semi-cylindrical body with a hat-shaped cross section corresponding to the cross-sectional shape and outer diameter dimensions of the horizontal reinforcement member 3 to be attached, and has first and second flange portions 113d, 113e located above and below the opening side and bent vertically in both the up and down directions, and the first and second flange portions 113d, 113e are welded to the left and right rib walls 111b, 111b, 112b, 112b on the butt surface side of the first and second fitting portions 111, 112 to hold them together. And, in the center of the upper and lower horizontal walls 113a, 113b on the main body side excluding the first and second flange portions 113d, 113e, insertion holes 113c, 113c for inserting drill screws (or tapping screws) 16, 16 are provided in the up and down direction. In addition, the rear body wall portion (upper and lower vertical wall portions) has insertion holes 113c, 113c at a predetermined distance above and below, through which two drill screws (or tapping screws) 16, 16 are inserted.

The horizontal reinforcement member 3 to be attached is inserted into the third fitting portion 113 in a state in which it can slide horizontally (in the X direction), and after alignment in the horizontal direction (X direction), the drill screws (or tapping screws) 16, 16 are inserted and screwed together to fasten and fix the member.

As a result, in this configuration, the upper end of the ceiling frame hanging member 4 made of square steel pipes is securely and firmly attached to the entire circumference of the horizontal reinforcement member 3 in the X direction made of lip channel steel via the mounting bracket 11 of the above configuration, as shown in Figure 41, realizing a highly earthquake-resistant connection structure that is less likely to move horizontally or vertically.

On the other hand, the ceiling frame is suspended by attaching the ceiling frame side soffit to the lower end of the ceiling frame hanging material 4, which is firmly attached to the X-direction reinforcement 3 in this way. The ceiling frame side soffit is attached to the lower end of the ceiling frame hanging material 4 using a specified connecting metal fitting, as shown in Figures 17 to 22 of the drawings in the publication of Patent Document 2. The connecting metal fittings that connect the lower ends of the ceiling frame hanging materials 4, 4... to the soffit are provided with a ceiling frame mounting position adjustment mechanism that adjusts the height of the ceiling frame to which they are attached. After the upper ends of the ceiling frame hanging materials 4, 4... are attached to the horizontal reinforcement 3 using the mounting metal fittings 11 as described above, the ceiling frame mounting position adjustment mechanism is used to accurately fine-tune the mounting position (height) of the ceiling frame, which is prone to bending, before connecting and fixing.

In other words, the connecting fittings that connect the lower ends of the ceiling frame hanging members 4, 4... to the ceiling frame include a first fitting that is positioned and fixed to the lower ends of the ceiling frame hanging members 4, 4..., and a second fitting that is fitted to the lower ends of the ceiling frame hanging members 4, 4... so as to be slidable in the vertical direction via the first fitting, and the second fitting is connected to any height position of the first fitting via a connecting bolt that is held slidable in the vertical direction through a long hole for adjusting the height position provided in the first fitting, so as to connect and support the ceiling frame at any height position of the first fitting.

With this configuration, the first metal fitting is first positioned and fixed to the lower end of the ceiling frame hanging material, and the second metal fitting for mounting to the ceiling frame is fitted to the ceiling frame hanging material 4, 4... via the first metal fitting. The second metal fitting for mounting to the ceiling frame can then be connected to the first metal fitting in a vertically slidable state via a connecting bolt supported vertically slidably via a long hole having a predetermined length in the vertical direction. Then, in this state, the height of the second metal fitting for mounting to the ceiling frame is adjusted to set the exact mounting position.

Then, by fitting the ceiling frame (and its sill receiving portion) into the ceiling frame fitting portion of the second metal fitting for mounting the ceiling frame, the ceiling frame can finally be attached in the correct position.

In this case, the height adjustment span of the ceiling frame attachment position relative to the ceiling frame hanging material is determined by the vertical length of the long hole in the first metal fitting that supports the connecting bolt. The connecting bolt serves to temporarily fasten the second metal fitting for ceiling frame attachment to the first metal fitting during height adjustment, but when height adjustment is complete, it serves to fix the second metal fitting for ceiling frame attachment to the ceiling frame hanging material via the first metal fitting.

The reference numerals in the above Figures 38 to 42 have been partially modified so as not to overlap with the reference numerals in the embodiments of the present invention described below, and do not necessarily match the reference numerals in the drawings of the previous application. For the same reason, reference numerals were not used in the explanation of the configuration of the connecting fittings (first and second fittings, etc.) shown in Figures 17 to 22 of the drawings in the publication of Patent Document 2.

As described above, in the ceiling frame suspension structure of Patent Document 2, the ceiling frame suspension material mounting bracket 11, which connects the upper ends of the vertically extending ceiling frame suspension materials 4, 4... in a cross-sectional manner to the horizontal reinforcement material 3 extending horizontally, comprises two sets of first and second fitting portions 111, 112 made of cylindrical bodies with a square cross section that slidably fit around the entire circumference of the ceiling frame suspension materials 4, 4... at a predetermined interval in the vertical direction, and a third fitting portion 113 with a hat-shaped cross section that connects the first and second fitting portions 111, 112 together at a predetermined interval in the vertical direction and fits slidably from the side of the horizontal reinforcement material 3, 3..., and these first to third fitting portions 111-113 are constructed as a single metal member. The first and second fitting parts 111, 112 are firmly fastened to the ceiling frame hanging member 4, and the third fitting part 113 is firmly fastened to the horizontal reinforcement member 3 using drill screws (or tapping screws) 16, 16, 16, 16, ... respectively.

Therefore, in the configuration of Patent Document 2, the strength of the ceiling frame suspension material mounting bracket 11 itself is greatly improved, and coupled with the fact that the ceiling frame suspension materials 4, 4... are made of square steel pipes with a specified cross-sectional shape and specified outer diameter, the earthquake resistance after mounting to the ceiling frame is much improved compared to the previous mounting structure for the rod shaft using mounting brackets with a hook structure and hanger structure.

In the case of the configuration of Patent Document 2, the first and second fitting portions 111, 112 are fitted to the ceiling frame hanging members 4, 4... so that they can slide vertically, and the third fitting portion 113 is fitted to the horizontal reinforcement member 3 so that they can slide vertically and horizontally. Therefore, alignment is easy both vertically and horizontally, and each can be easily installed.

Furthermore, in the case of the configuration of Patent Document 2, the connecting fittings that connect the lower ends of the ceiling frame hanging materials 4, 4... to the ceiling frame side joist support as described above are provided with a ceiling frame mounting position adjustment mechanism that adjusts the position (vertical height) at which the ceiling frame is attached, and after the ceiling frame hanging material mounting fittings 11 are used to attach the upper end of the ceiling frame hanging materials 4, 4... to the horizontal reinforcement material 3 at a predetermined position, the height of the ceiling frame, which is prone to bending, is finally adjusted accurately before being connected and fixed. Therefore, in combination with the fact that the ceiling frame hanging materials 4, 4... are slidably fitted in the first and second fitting portions 111, 112 of the ceiling frame hanging material mounting fittings 11, it becomes easy to attach the ceiling frame and adjust the vertical height position.

JP 2008-50784 A JP 2020-007882 A

In the case of the ceiling frame suspension structure of Patent Document 2, the third fitting portion 113 with a hat-shaped cross section of the ceiling frame suspension material mounting bracket 11 is firmly fastened to the horizontal reinforcement material 3 on three sides of the U-shape, and the first and second fitting portions 111, 112, which are rectangular tubular and spaced a specified distance apart in the vertical direction, are firmly connected and integrated in a cross-shaped manner to the horizontal reinforcement material 3 side while fitting the entire circumference of the ceiling frame suspension material 4 made of a rectangular steel pipe with a square cross section, greatly improving the strength of the ceiling frame suspension material 4 in the vertical direction against compression and tensile loads, the rigidity in the direction perpendicular to the axis, and the strength in the horizontal direction.

As a result, it is possible to configure a suspended ceiling with a wind pressure resistant structure that can withstand cases where upward wind pressure acts on the ceiling frame hanging section and a significant compressive load is placed on the ceiling frame hanging material 4. In addition, earthquake resistance against vertical and horizontal shaking during an earthquake is improved, and brace materials as in the case of conventional hanging bolt structures are no longer necessary.

However, in the case of the ceiling frame suspension structure of Patent Document 2, the following problems arise when connecting the horizontal reinforcement member 3 and the ceiling frame suspension member 4.

In other words, in the ceiling frame suspension material mounting bracket 11 of the same configuration, the third fitting portion 113 with a hat-shaped cross section is fitted from the side to the horizontal reinforcement material 3, and although the ceiling frame suspension material mounting bracket 11 can be temporarily engaged and held in a predetermined position relative to the horizontal reinforcement material 3, it cannot be stably locked unless the drill screws (or tapping screws) 16, 16... are screwed in. Therefore, misalignment is likely to occur after positioning, and the installation work of the third fitting portion 113 to the horizontal reinforcement material 3 is not necessarily easy. In addition, the work of fitting and inserting the ceiling frame suspension material 4 into the first and second fitting portions 111, 112, which have a small dimensional difference, is not necessarily easy.

In addition, a ceiling frame attachment position adjustment mechanism with a fixed span is provided on the connecting metal fittings between the lower end of the ceiling frame hanging material 4 and the sill support, but this is a final fine adjustment mechanism, and there is a limit to the span (height dimension) that can be adjusted. Therefore, if there is more bending (height fluctuation) on the ceiling frame side than expected, the ceiling frame attachment position adjustment mechanism alone cannot handle it, and readjustment is required at the upper end attachment part of the ceiling frame hanging material 4.

For this reason, in the configuration of Patent Document 2, the positioning of the ceiling frame hanging member 4 at the upper end mounting portion must be performed accurately, taking into account the final amount of deflection of the ceiling frame, and the installation work of the ceiling frame hanging member 4 to the horizontal reinforcement member 3 was not necessarily easy.

The present invention has been made to solve these problems, and aims to provide a ceiling frame hanging structure in which the fitting portion of the ceiling frame hanging material mounting bracket for the horizontal reinforcement material on the ceiling substructure is formed into a hook structure that fits into the horizontal reinforcement material on the ceiling substructure from above, while the fitting portion for the ceiling frame hanging material is a vertical fitting portion that is formed integral with the vertical wall portion of the fitting portion of the hook structure by utilizing the vertical wall portion of the fitting portion of the hook structure, and the vertical fitting portion is provided with a mounting position adjustment function for the ceiling frame hanging material, making it possible to adjust the mounting position of the ceiling frame hanging material, and the open end of the vertical fitting portion is provided with a locking portion that prevents the ceiling frame hanging material fitted into the fitting portion from moving out of the fitting portion .

The ceiling frame suspension structure of the present invention is configured with the following problem-solving measures to solve the above problems.

(1) First Solution to the Problem of the Present Invention First, the ceiling frame suspension structure in the first solution to the problem of the present invention is a ceiling frame suspension structure in which a horizontal reinforcement member on the ceiling base side that suspends a ceiling frame via a ceiling frame suspension member is made of structural steel or square steel pipes, and the ceiling frame suspension member is made of structural steel or square steel pipes, and an upper portion of the ceiling frame suspension member is attached vertically to the horizontal reinforcement member via a ceiling frame suspension member mounting bracket, while a lower portion of the ceiling frame suspension member is attached to the ceiling frame via a ceiling frame mounting means having a ceiling frame mounting position adjustment function,
The ceiling frame hanging material mounting bracket is configured by a first fitting portion having a hook structure that fits into the horizontal reinforcement from above to lock the ceiling frame hanging material mounting bracket to the horizontal reinforcement, and a pair of opposing walls that sandwich the ceiling frame hanging material on both sides of a vertical wall portion that abuts against the side of the horizontal reinforcement of the first fitting portion, and is equipped with a second fitting portion with a U-shaped cross section that slidably fits the upper part of the ceiling frame hanging material, and the second fitting portion has a gap between the ceiling frame hanging material to be fitted and the second fitting portion. a ceiling frame hanging material connecting means having a ceiling frame hanging material installation position adjustment function for adjusting the installation position of the ceiling frame hanging material is provided , while a locking portion is provided at the open ends of the pair of opposing walls of the second fitting portion to prevent the ceiling frame hanging material fitted into the fitting portion from moving out of the fitting portion, avoiding the screwing position at which the vertical wall portion abutting against the side of the horizontal reinforcement of the first fitting portion is screwed into the side of the horizontal reinforcement .

In this first problem-solving method, first, a ceiling frame suspension material mounting bracket, which attaches the upper part of the ceiling frame suspension material to the horizontal reinforcement material on the ceiling substructure, is configured with a first fitting portion of a hook structure that slidably fits into the horizontal reinforcement material from above to lock the ceiling frame suspension material mounting bracket to the horizontal reinforcement material , and a pair of opposing walls that sandwich the ceiling frame suspension material on both sides of a vertical wall portion that abuts the side of the horizontal reinforcement material of the first fitting portion, and a second fitting portion with a U-shaped cross section that slidably fits into the upper part of the ceiling frame suspension material.

Therefore, when connecting the upper part of the ceiling frame suspension material to the horizontal reinforcement material on the ceiling substrate side via the ceiling frame suspension material mounting bracket, all that is required is to first fit the first fitting portion of the hook structure of the ceiling frame suspension material mounting bracket into the horizontal reinforcement material from above, and the ceiling frame suspension material mounting bracket can be easily engaged in a slidable manner with the upper part of the horizontal reinforcement material, and the positioning can be easily adjusted in this engaged state. After that, it can be reliably maintained in a stable engagement state, and it will not easily shift position as in the case of the configuration in Patent Document 2.

As a result, it becomes easier to attach the horizontal reinforcement member to the side of the horizontal reinforcement member with which the vertical wall portion of the first fitting portion of the hook structure abuts, using a drill screw (or tapping screw). In addition, the mounting strength of the ceiling frame hanging member mounting bracket to the horizontal reinforcement member is improved.

On the other hand, the second fitting portion to which the upper part of the ceiling frame hanging material is attached is configured by integrally providing a pair of opposing walls that sandwich the ceiling frame hanging material on both sides of the vertical wall portion that abuts against the side surface of the horizontal reinforcement of the first fitting portion of the hook structure, and is formed into a fitting portion with a U-shaped cross section that fits the upper part of the ceiling frame hanging material so that it can slide up and down. And, as described later, this second fitting portion is provided with a locking portion that prevents the ceiling frame hanging material fitted into the fitting portion from moving out of the fitting portion, so that the ceiling frame hanging material can be fitted as desired from either the up or down direction.

In this case, the vertical wall of the first fitting portion of the hook structure is provided in a shape that corresponds to the entire side surface of the horizontal reinforcement (the entire area between the upper and lower ends). Therefore, the second fitting portion that is integrated with the vertical wall is also formed in a shape that corresponds to the entire side surface of the horizontal reinforcement, and is sufficiently strong.

This second fitting portion is further provided with a ceiling frame hanging material connecting means having an installation position adjustment function for adjusting the installation position of the upper part of the ceiling frame hanging material to a predetermined height position between the second fitting portion and the ceiling frame hanging material.

Therefore, as already mentioned, even if there is a bending (height fluctuation) on the ceiling frame side that exceeds expectations and the ceiling frame mounting position adjustment function of the lower ceiling frame mounting means portion of the ceiling frame hanging material cannot cope with it, it is possible to easily adjust it with the ceiling frame hanging material connecting means portion of the upper second fitting portion of the ceiling frame hanging material. In this case, the ceiling frame hanging material mounting position adjustment function at the upper part of the ceiling frame hanging material is set to be sufficiently larger than the ceiling frame mounting position adjustment function at the lower part of the ceiling frame hanging material.

As a result, the positioning of the upper connecting part of the ceiling frame hanging material does not have to be done precisely taking into account the final amount of deflection of the ceiling frame; it is sufficient to position it at a certain level and then finally adjust the level using both the upper and lower installation position adjustment functions, making the installation work of the ceiling frame hanging material to the horizontal reinforcement much easier.

In the case of this configuration, the second fitting portion is integrally provided on both sides of the vertical wall portion of the first fitting portion that abuts against the side surface of the horizontal reinforcement member, and is a fitting portion having a U-shaped cross section with a pair of opposing walls on the left and right that slidably fit the upper part of the ceiling frame hanging material. Therefore, the ceiling frame hanging material fitted into the second fitting portion can be easily slid up and down.

In the case of the same configuration, the vertical wall of the first fitting part of the hook structure is provided in a shape that corresponds to the entire side surface of the horizontal reinforcement (the entire area between the upper and lower ends), and the second fitting part, which is a three-sided structure with a U-shaped cross section formed by the vertical wall part and a pair of opposing walls, is also formed in a shape that corresponds to the entire side surface of the horizontal reinforcement. Therefore, the vertical wall of the first fitting part of the hook structure abuts against the entire side surface of the horizontal reinforcement to effectively reinforce the side surface of the horizontal reinforcement, and is further reinforced with high rigidity by the second fitting part with a U-shaped cross section having a pair of opposing walls, resulting in an extremely high rigidity.

As a result, the strength of each of the first and second mating portions, as well as their mutual connection strength (integral strength) and rigidity, are all increased, and the mounting strength of the ceiling frame suspension material mounting bracket to the horizontal reinforcement material and the connection strength of the upper part of the ceiling frame suspension material to the ceiling frame suspension material mounting bracket are also improved.

In addition, as described above, the second fitting portion having a U-shaped cross section is provided with a connecting means for the ceiling frame hanging material, which is equipped with an installation position adjustment function that adjusts the installation position of the upper part of the ceiling frame hanging material to a predetermined height position between the ceiling frame hanging material and the ceiling frame hanging material, making installation of the connecting means easy.

Furthermore, in the same configuration, a locking portion is provided at the open ends of a pair of opposing walls of the second fitting portion to prevent the ceiling frame hanging material fitted into the fitting portion from moving outside the fitting portion, avoiding the screwing position where the vertical wall portion abutting against the side of the horizontal reinforcement of the first fitting portion is screwed into the side of the horizontal reinforcement .

When the second fitting portion into which the ceiling frame hanging material is fitted has a pair of opposing walls and is formed with an opening in a U-shape in cross section, it is easy to fit the ceiling frame hanging material, but on the other hand, it is difficult to position and fix it after fitting, and it is difficult to connect the upper part of the ceiling frame hanging material to the horizontal reinforcement material in an accurately positioned state.

Therefore, in the configuration of the problem-solving means of this invention, a locking portion is provided at the opening of the second fitting portion, which has a U-shaped cross-section and into which the ceiling frame hanging material is fitted, i.e., at the outer ends of a pair of opposing walls that sandwich the ceiling frame hanging material, to prevent the ceiling frame hanging material fitted into the second fitting portion from moving out of the fitting portion, making positioning easier and enabling connection in an accurately positioned state.

In this case, the ceiling frame hanging material mounting bracket is fixed to the horizontal reinforcement by screwing and fastening the vertical wall portion of the first fitting portion to the horizontal reinforcement, so when installing the locking portion on the outer ends of the pair of opposing walls, the locking portion is installed to avoid the screwing position where the vertical wall portion of the first fitting portion is screwed to the horizontal reinforcement.

This makes it possible to easily screw and fasten the vertical wall portion of the first fitting portion to the horizontal reinforcement material, while ensuring reliable positioning of the ceiling frame hanging material fitted into the second fitting portion.

(2) Second Means for Solving the Problem of the Present Invention Next, the ceiling frame hanging structure in the second means for solving the problem of the present invention is characterized in that, in the configuration of the first means for solving the problem of the present invention , the ceiling frame hanging material connecting means equipped with a ceiling frame hanging material mounting position adjustment function is composed of a pair of left and right loose holes of a predetermined length extending in the vertical direction provided in a pair of opposing walls that sandwich the ceiling frame hanging material of the second fitting portion of the ceiling frame hanging material mounting bracket, a pair of left and right bolt insertion holes provided in the ceiling frame hanging material, and connecting bolts that connect and fix the second fitting portion and the ceiling frame hanging material via the pair of left and right loose holes and the pair of left and right bolt insertion holes .

In such a configuration, the upper part of the ceiling frame hanging material is fitted into the second fitting portion of the ceiling frame hanging material mounting bracket, which is fitted and fixed to the horizontal reinforcement material via the first fitting portion of the hook structure, and positioned by sliding it up and down.In this state, by passing a connecting bolt through the loose holes in a pair of opposing walls that sandwich the ceiling frame hanging material at the second fitting portion and through the bolt insertion hole of the ceiling frame hanging material and connecting it with a nut, the material can be securely fixed in the positioned position, and the upper part of the ceiling frame hanging material is securely connected and fixed to the horizontal reinforcement material via the ceiling frame hanging material mounting bracket.

After the connection and fixing, the lower part of the ceiling frame hanging material is attached to the ceiling frame after the attachment position is adjusted via a ceiling frame attachment means having a ceiling frame attachment position adjustment function.

In this case, if there is a greater deflection (height fluctuation) on the ceiling frame side than expected and it cannot be handled by the ceiling frame mounting position adjustment function on the lower side of the ceiling frame hanging material alone, the connection state of the above-mentioned connecting bolt at the second fitting part on the upper side of the ceiling frame hanging material is released, and the necessary height position adjustment is made at the upper mounting part of the same ceiling frame hanging material, which, together with the adjustment made by the ceiling frame mounting position adjustment function on the lower side of the ceiling frame hanging material, makes it possible to install the ceiling frame at as uniform a level as possible.

Therefore, according to this configuration, the entire ceiling frame can be installed at as uniform a level as possible, which significantly facilitates installation and level adjustment work.

In this case, the configuration of the ceiling frame mounting means equipped with a ceiling frame mounting position adjustment function on the lower side of the above-mentioned ceiling frame hanging material is the ceiling frame mounting means equipped with the same mounting position adjustment function in the configuration of Patent Document 2 already mentioned.

(3) Third solution to the problem of the present invention Next, the ceiling frame hanging structure in the third solution to the problem of the present invention is characterized in that, in the configuration of the first or second solution to the problem of the present invention , the main body portion of the hook structure of the ceiling frame hanging material mounting bracket, which forms the first and second fitting portions, is provided with a reinforcing rib located midway in the width direction and extending in a band-like shape over the entire first and second fitting portions .

With this configuration, the rigidity of the main body of the hook structure of the ceiling frame suspension member mounting bracket, which has the first and second fitting portions, is greatly improved, and the mounting strength to the horizontal reinforcement member and the ceiling frame suspension member, as well as the connecting strength between the horizontal reinforcement member and the ceiling frame suspension member, are greatly improved. As a result, the earthquake resistance is improved.

In this case, the height of the reinforcing rib is made higher than the height of the head of the drill screw (or tapping screw) for fastening the ceiling frame hanging material mounting bracket to the horizontal reinforcement, which is located on both the left and right sides of the reinforcing rib and screwed in. In this way, the ceiling frame hanging material fitted into the second fitting part of the ceiling frame hanging material mounting bracket slides smoothly without contacting the head of the drill screw (or tapping screw) for fastening the ceiling frame hanging material mounting bracket to the horizontal reinforcement. Therefore, the positioning operation after fitting is easy.

As a result of the above, according to the present invention, in addition to increasing the strength and rigidity of the ceiling frame hanging material and the ceiling base horizontal reinforcement material, the bonding strength between the ceiling frame hanging material mounting part and the ceiling base horizontal reinforcement material is greatly improved, and the strength of the entire ceiling frame hanging part is also greatly improved. As a result, the earthquake resistance of the entire ceiling base is improved, making it possible to provide a ceiling frame hanging structure with higher earthquake resistance.

The ceiling frame suspension mounting bracket, which attaches the ceiling frame suspension material to the horizontal reinforcement material on the ceiling substrate, is structurally a single metal member, but has first and second fitting parts that slidably fit the horizontal reinforcement material and the ceiling frame suspension material, and by slidably fitting each of them into the corresponding parts, they are supported in a reliably stable engagement state, and after properly positioning each, they can be easily attached using screw members. In particular, the first fitting part that fits into the horizontal reinforcement material on the ceiling substrate has a hook structure, which is extremely easy to engage with the upper part of the horizontal reinforcement material. Moreover, the subsequent engagement state is also stable, and does not lead to positional misalignment. This makes the installation work of attaching the ceiling frame suspension material to the horizontal reinforcement material significantly easier.

The ceiling frame hanging material also has an adjustment function for the mounting position at each mounting part on the upper and lower sides. Therefore, both large overall height position adjustments and precise fine height position adjustments can be easily achieved.

This is an oblique view showing the configuration of the main parts of the ceiling frame hanging structure for embodiment 1 of the present invention, in which the horizontal reinforcement on the ceiling substructure side is a lip channel steel and the ceiling frame hanging material is a square steel pipe (the connection structure between the horizontal reinforcement and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the joist support via the ceiling frame connecting bracket). This is an oblique view showing the configuration of the main parts of the ceiling frame hanging structure (the connection structure between the horizontal reinforcement material and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the joist support via the ceiling frame connecting bracket). This is a front view showing the configuration of the main parts of the ceiling frame hanging structure (the connection structure between the horizontal reinforcement material and the ceiling frame hanging material via the ceiling frame hanging material mounting brackets, and the connection structure between the ceiling frame hanging material and the joist support via the ceiling frame connecting brackets). This is a plan view showing the configuration of the main parts of the ceiling frame hanging structure (the connection structure between the horizontal reinforcement material and the ceiling frame hanging material via ceiling frame hanging material mounting brackets, and the connection structure between the ceiling frame hanging material and the joist support via ceiling frame connecting brackets). This is a right side view showing the configuration of the main parts of the same ceiling frame hanging structure (the connection structure between the horizontal reinforcement material and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the joist support via the ceiling frame connecting bracket). This is a cross-sectional view of the A-A line in Figure 2, showing the configuration of the main parts of the ceiling frame hanging structure (the connection structure between the horizontal reinforcement material and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the siding support via the ceiling frame connecting bracket). This is a cross-sectional view of the B-B line cut in Figure 3, showing the configuration of the main parts of the ceiling frame hanging structure (the connection structure between the horizontal reinforcement material and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the soffit support via the ceiling frame connecting bracket). This is a cross-sectional view of the C-C line cut in Figure 3, showing the configuration of the main parts of the ceiling frame hanging structure (the connection structure between the horizontal reinforcement material and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the soffit support via the ceiling frame connecting bracket). This is an exploded oblique view showing the configuration of the main parts of the ceiling frame hanging structure (the connection structure between the horizontal reinforcement material and the ceiling frame hanging material via the ceiling frame hanging material mounting brackets, and the connection structure between the ceiling frame hanging material and the joist support via the ceiling frame connecting brackets). This is an enlarged oblique view showing the structure of a single ceiling frame hanging material mounting bracket in the same ceiling frame hanging structure (Figures 1 to 9). This is a partially exploded oblique view showing the installation state (engaged state) of the ceiling frame hanging material mounting bracket (first fitting portion) to the horizontal reinforcement material in the same ceiling frame hanging structure (Figures 1 to 9). This is an exploded oblique view showing the connection structure (connection structure with a ceiling frame hanging material mounting position adjustment function) between the ceiling frame hanging material mounting bracket (second fitting portion) and the upper end of the ceiling frame hanging material in the same ceiling frame hanging structure. This is an enlarged front view showing the ceiling frame mounting structure (mounting structure with a ceiling frame mounting position adjustment function) relative to the lower end of the ceiling frame hanging material of the same ceiling frame hanging structure. 1 is an exploded oblique view showing the configuration of a ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the same ceiling frame hanging structure. FIG. 13 is an enlarged oblique view showing the configuration of the positioning fitting portion of the ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the ceiling frame hanging structure. FIG. 13 is an enlarged front view showing the configuration of the positioning fitting portion of the ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the ceiling frame hanging structure. FIG. 13 is an enlarged plan view showing the configuration of the positioning fitting portion of the ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the ceiling frame hanging structure. FIG. An enlarged side view showing the positioning state of the positioning fitting portion of the ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the same ceiling frame hanging structure. This is an oblique view showing the state in which the ceiling frame hanging material is attached to the highest adjusted position using the ceiling frame hanging material mounting position adjustment mechanism in the ceiling frame hanging material mounting bracket (second fitting portion) of the same ceiling frame hanging structure. This is an oblique view showing the state in which the ceiling frame hanging material is attached to the lowest adjusted position using the ceiling frame hanging material mounting position adjustment mechanism in the ceiling frame hanging material mounting bracket (second fitting portion) of the same ceiling frame hanging structure. This is an oblique view showing the configuration of the main parts of the ceiling frame suspension structure of embodiment 2 of the present invention, in which the horizontal reinforcement on the ceiling substructure side is a lip channel steel and the ceiling frame suspension material is a lip channel steel (the connection structure between the horizontal reinforcement material and the ceiling frame suspension material via a ceiling frame suspension material mounting bracket, and the connection structure between the ceiling frame suspension material and the joist support via a ceiling frame connecting bracket). 2 is an exploded perspective view showing the configuration of the main part of the ceiling frame hanging structure. FIG. This is an exploded oblique view showing the connection structure (connection structure with mounting position adjustment function) between the ceiling frame hanging material fitting portion (second fitting portion) of the ceiling frame hanging material mounting bracket and the upper end portion of the ceiling frame hanging material in the same ceiling frame hanging structure. This is an oblique view showing the configuration of the main parts of the ceiling frame hanging structure of embodiment 3 of the present invention, in which the horizontal reinforcement on the ceiling substructure side is a square steel pipe and the ceiling frame hanging material is a square steel pipe (the connection structure between the horizontal reinforcement and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the joist support via the ceiling frame connecting bracket). This is an oblique view showing the configuration of the main parts of the ceiling frame hanging structure of embodiment 4 of the present invention, in which the horizontal reinforcement on the ceiling substructure side is a square steel pipe and the ceiling frame hanging material is a lip channel steel (the connection structure between the horizontal reinforcement and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the joist support via the ceiling frame connecting bracket). This is an oblique view showing the configuration of the main parts of the ceiling frame hanging structure of embodiment 5 of the present invention, in which the horizontal reinforcement on the ceiling substructure side is a lip channel steel and the ceiling frame hanging material is a square steel pipe (the connection structure between the horizontal reinforcement and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the joist support via the ceiling frame connecting bracket). This is an oblique view showing the configuration of the main parts of the ceiling frame hanging structure (the connection structure between the horizontal reinforcement material and the ceiling frame hanging material via the ceiling frame hanging material mounting bracket, and the connection structure between the ceiling frame hanging material and the joist support via the ceiling frame connecting bracket). 28 is an enlarged perspective view showing the mounting structure of the ceiling frame hanging material mounting bracket to the horizontal reinforcement material in the same ceiling frame hanging structure (FIGS. 26 and 27). FIG. 27A and 27B are enlarged perspective views showing the structure of a single ceiling frame hanging material mounting bracket in the same ceiling frame hanging structure (FIGS. 26 and 27). 27A and 27B are enlarged perspective views showing another structural example of the ceiling frame hanging material mounting bracket alone in the same ceiling frame hanging structure (FIGS. 26 and 27). This is an exploded oblique view showing the connection structure (connection structure with a ceiling frame hanging material mounting position adjustment function) of the ceiling frame hanging material mounting bracket (second fitting portion) and the upper end portion of the ceiling frame hanging material in the same ceiling frame hanging structure (Figures 26 and 27). This is an enlarged cross-sectional view cut front to back on one side in the left-right direction, showing the positioning state of the positioning fittings of the ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the same ceiling frame hanging structure (Figures 26 and 27). This is an enlarged cross-sectional view cut left and right at the center in the front-to-back direction, showing the positioning state of the positioning fittings of the ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the same ceiling frame hanging structure (Figures 26 and 27). An enlarged oblique view showing the configuration of the positioning fitting portion of the ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the same ceiling frame hanging structure (Figures 26 and 27). An enlarged side view showing the configuration of the positioning fitting portion of the ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the same ceiling frame hanging structure (Figures 26 and 27). This is an enlarged plan view showing the configuration of the positioning fitting portion of the ceiling frame mounting position adjustment mechanism at the lower end of the ceiling frame hanging material of the same ceiling frame hanging structure (Figures 26 and 27). This is an enlarged oblique view showing the configuration of a single ceiling frame suspension material mounting bracket in a ceiling frame suspension structure of embodiment 6 of the present invention, in which the horizontal reinforcement material on the ceiling substructure side is a lip channel steel and the ceiling frame suspension material is a square steel pipe, as in embodiment 5. This is an oblique view showing the configuration of the ceiling base (building structure - horizontal reinforcement hanging member - horizontal reinforcement member) part of the ceiling frame suspension structure related to the applicant's previous application (Patent Document 2). This is an enlarged perspective view (partially cut away perspective view) of a key portion showing the structure of a horizontal reinforcement hanging member (square steel pipe) in the ceiling frame hanging structure of the same prior application (Patent Document 2). This is an oblique view showing the connection state of the horizontal reinforcement hanging material to the building structure in the ceiling base part (Figure 26 part) of the ceiling frame hanging structure of the same prior application (Patent Document 2). This is an enlarged oblique view (partially cut away oblique view) of a key portion showing the connection structure between the upper end of the ceiling frame hanging material and the horizontal reinforcement material in the ceiling frame hanging structure of the same prior application (Patent Document 2). This is an enlarged oblique view showing the configuration of the ceiling frame suspension material mounting bracket used to connect the ceiling frame suspension material shown in Figure 29 to the horizontal reinforcement material in the ceiling frame suspension structure of the same prior application.

Below, we will explain in detail some specific embodiments for implementing the ceiling frame suspension structure of the present invention with reference to the attached Figures 1 to 37.

<Regarding the ceiling frame suspension structure according to the first embodiment of the present invention: Figs. 1 to 20>
(Basic configuration of the entire ceiling frame suspension structure)
First, Figure 1 shows the configuration of the XY direction horizontal reinforcements 3, 3... suspended from a building structure (H-shaped steel 10, 10...) using a ceiling base structure (Figures 38 to 40) in the ceiling frame suspension structure relating to the invention of the previous application already mentioned (invention of Patent Document 2), and the ceiling frame 8 portion suspended from the horizontal reinforcements 3, 3... via horizontal reinforcement suspension members (vertical members) 4, 4....

In the embodiment of the invention of this application, the H-shaped steel 10 with a pair of horizontal left and right mounting edges 10a, 10a as shown in Figures 38 and 40 is used as the structure on the underside of the upper floor of the building from which the lattice-shaped ceiling frame 8 consisting of multiple rafters (channel steel) 2, 2... and rafter supports (channel steel) 1, 1... is suspended. A ceiling base with a "grape trellis structure" that is the basis for mounting the ceiling frame 8 is constructed by suspending multiple horizontal reinforcement members (horizontal reinforcement members) 3, 3..., 3, 3... in the XY direction with a specified external dimension (vertical length) from the above-mentioned mounting edges 10a, 10a of the H-shaped steel 10 via multiple hanging members (vertical members) 20, 20... made of square steel pipes (square steel) with a specified external diameter and cross-sectional structure as shown in Figure 39.

Then, as shown in Figure 1, the lattice-shaped ceiling frame 8 consisting of the rafters 2 and rafter supports 1 is suspended stably and with good earthquake resistance from the multiple horizontal reinforcement members 3, 3..., 3, 3... in the XY directions of this basic ceiling substrate via multiple ceiling frame suspension members (vertical members) 4, 4... made of square steel pipes with a specified outer diameter (similar in structure to the square steel pipes in Figure 39 are used).

In the case of the configuration in Figure 1, the configuration of the ceiling substructure portion above the horizontal reinforcement hanging members (vertical members) 20, 20... of the ceiling substructure structure in Figure 38 is omitted, and the horizontal reinforcements 3, 3..., 3, 3... in the XY directions are also omitted, and only the horizontal reinforcements 3, 3... in the Y direction are shown.

(Regarding the mutual attachment structure of the ceiling frame 8 and the ceiling frame supports 1, 1)
In the embodiment of the present invention, of the horizontal reinforcements 3, 3..., 3, 3... in the XY directions that are supported with high earthquake resistance as described above, the horizontal reinforcements 3, 3... in the X direction are selected and shown as an example, and lip channel steel is used as the horizontal reinforcements 3, 3.... Also, as the ceiling frame suspension members 4, 4..., square steel pipes (square steel) similar to the reinforcement suspension members 20, 20... shown in Figure 39 are used to attach the ceiling frame 8 (see Figure 2).

On the other hand, the ceiling frame 8, like the conventional one, is made up of a number of siding supports 1, 1... located at the upper side and a number of sidings 2, 2... attached to the lower side of the multiple siding supports 1, 1..., and these siding supports 1, 1... and sidings 2, 2... are mutually framed in a lattice shape.

In this embodiment, the sill supports 1, 1... and the sills 2, 2... are both formed from channel steel with a web portion and flange portions at both ends of the web portion, but the flange portions of the sills 2, 2... are each provided with hook-structured ribs (hook-shaped curved pieces) 2a, 2a, as shown in Figures 2 and 3.

The two are arranged perpendicularly, for example with the soffit support 1 standing with its web part vertically and the soffit 2 laying with its web part horizontally, and are connected to each other by a connecting metal fitting (earthquake-resistant clip) 7 provided at the intersection. This connecting metal fitting 7 is, for example, two identically shaped boards overlapping each other in a cross-like state, with the overlapping upper ends 7a, 7a as the fastening part, the middle parts 7b, 7b that sandwich the soffit support 1 from both sides as the soffit support fixing part, and the lower ends 7c, 7c that slidably engage with the inside of the hook-shaped ribs 2a, 2a of the soffit 2 and connect the soffit 2 to the soffit support 1 as the engagement part. In addition, a fixing member 7d for engaging (anti-slip) the connecting metal fitting 7 is screwed to the outer periphery of the ribs 2a, 2a at the lower ends 7c, 7c, which are the engagement parts (see Figures 2, 3, and 5).

The upper ends 7a, 7a and middle parts 7b, 7b are then fastened together with, for example, drill screws (or tapping screws) 9a, 9b, so that they are connected to each other in a crossed state as shown in Figures 1 to 5. This forms the ceiling frame 8 with a lattice structure as shown in Figure 1. A ceiling panel 80 is then provided on the underside of this ceiling frame 8.

(Regarding the mounting structure of the ceiling frame 8 using the ceiling frame hanging members 4, 4... to the horizontal reinforcement members 3, 3... on the ceiling base)
The ceiling frame 8 with the joist 2 connected to the joist support 1 in the above-mentioned manner is suspended from the above-mentioned horizontal reinforcement 3 suspended from the H-shaped steel (H-shaped steel 10 in Figs. 38 and 40) via the ceiling frame suspension member 4 made of a square steel pipe with a square cross section, as shown in Figs. 2 to 8. The square steel pipe with a square cross section that constitutes this ceiling frame suspension member 4 is a square steel pipe with the configuration shown in Fig. 39, similar to the horizontal reinforcement suspension member 20 on the ceiling substrate side (see Figs. 38 and 40).

When suspending the ceiling frame 8 from the horizontal reinforcement 3, i.e., when attaching (connecting) the upper end portion of the ceiling frame suspension member 4 to the horizontal reinforcement 3, as shown in Figures 2 to 8, for example, a ceiling frame suspension member mounting bracket 5 having the configuration shown in Figures 9 and 10 is used.

This ceiling frame hanging material mounting bracket 5 consists of a first fitting portion 5A that fits vertically from above into the horizontal reinforcement material 3 made of the lip channel steel in a U-shape, and a second fitting portion 5B that is located on the side of the first fitting portion 5A and fits horizontally from the side into the ceiling frame hanging material 4 made of the vertically extending square steel pipe in a U-shape.The first and second fitting portions 5A and 5B are integrated together into a single hook-shaped structure, for example as shown in Figure 10.

That is, the first fitting portion 5A is composed of a vertical wall portion 51 of vertical length that abuts against the entire side surface of the upper and lower lip portions 3b, 3b of the horizontal reinforcement member 3, a top wall portion 52 that is perpendicular to the top surface side of the horizontal reinforcement member 3 from the upper end of the vertical wall portion 51 and extends beyond the top surface side to the web portion 3a side on the other side, and an engagement wall portion 53 that is perpendicular to the end of the web portion 3a of the top wall portion 52 and extends downward along the surface of the web portion 3a for a predetermined length, and as a whole is configured to have a hook structure with a figure-7 shape in vertical cross section (side view). 10, a reinforcing rib 54 having a predetermined raised height is provided in the left-right widthwise intermediate portion of the hook-structured main body wall (main body plate portion of the mounting bracket 5 main body) extending from the vertical wall portion 51 to the top wall portion 52 and from the top wall portion 52 to the engagement wall portion 53, and the reinforcing rib 54 reinforces the sufficient rigidity and strength of the main body wall (main body plate) extending from the vertical wall portion 51 to the top wall portion 52 and from the top wall portion 52 to the engagement wall portion 53 as a hook structure. The raised height of the reinforcing rib 54 from the main body wall surface is set to a height such that when the hook structure is fastened to the upper and lower lip portions 3b, 3b of the horizontal reinforcing member 3 with drill screws (or tapping screws) 57, 57, 57, 57, the heads of the drill screws (or tapping screws) 57, 57, 57, 57 do not interfere with the side wall surface of the ceiling frame hanging member 4 sliding in the second fitting portion 5B. In addition, the reference numerals 51a, 51a, 51a, 51a are screw holes for screwing in drill screws (or tapping screws) 57, 57, 57, 57 in the vertical wall portion 51 portion corresponding to the upper and lower lip portions 3b, 3b of the horizontal reinforcement member 3.

The second fitting portion 5B is formed by utilizing the vertical wall portion 51 of the first fitting portion 5A, and the vertical wall portion 51 having the reinforcing rib 54 of the first fitting portion 5A and a pair of opposing walls (opposing walls for forming the fitting portion) 55, 55 provided on both sides of it form a ceiling frame hanging material fitting portion having a three-sided structure with a U-shaped horizontal cross section (when viewed from above).

That is, in this configuration, a pair of opposing walls (fitting walls) 55, 55 that fit horizontally from the side to the ceiling frame hanging material 4 made of vertically extending square steel are provided on the left and right sides of the vertical wall portion 51 of the first fitting portion 5A, forming a fitting portion with a U-shaped cross section that can slide up and down with the ceiling frame hanging material 4, 4... made of vertically extending square steel pipes by three wall surfaces, the vertical wall portion 51 surface having the reinforcing rib 54 of the first fitting portion 5A and the pair of opposing walls (fitting walls) 55, 55 on both sides. The width of the pair of opposing walls (fitting walls) 55, 55 corresponds to the width of the side wall portion of the ceiling frame hanging material 4, 4... made of square steel pipes.

Then, in the left-right center of the pair of opposing walls (fitting walls) 55, 55, there are provided loose holes (long holes) 55a, 55a for adjusting the mounting position (height) of the ceiling frame hanging material 4, which extends a predetermined length in the vertical direction. In addition, in the lower left part of the pair of opposing walls (fitting walls) 55, 55, there are provided screw holes 55b, 55b, 55b, 55b, which are provided at a predetermined interval in the vertical direction to fix the second fitting portion 5B to the ceiling frame hanging material 4 made of a square steel pipe with drill screws (or tapping screws) 58, 58, 58, 58. On the other hand, in the left and right side wall parts of the ceiling frame hanging material 4 made of a square steel pipe, for example, at the upper 2/3 height part in the vertical direction, a pair of left and right bolt insertion holes 4a, 4a that penetrate both inward and outward are provided (see FIG. 9). Then, the ceiling frame hanging material 4 made of a square steel pipe is fitted into the second fitting portion 5B into the loose holes (long holes) 55a, 55a for adjusting the ceiling frame hanging material attachment position (height) of the pair of left and right opposing walls (fitting walls) 55, 55 and the pair of left and right bolt insertion holes 4a, 4a of the ceiling frame hanging material 4, and when a certain height adjustment (level adjustment) has been made, a connecting bolt 56 is inserted, and the pair of left and right opposing walls (fitting walls) 55, 55 and the ceiling frame hanging material 4 are connected and fixed to each other via flat washers 56a, spring washers 56b, and fixing nuts 56c (see Figure 12) (see Figures 2, 6, 7, and 8). After the connecting bolt 56, flat washer 56a, spring washer 56b, and fixing nut 56c are connected and fixed, the pair of opposing walls (engagement walls) 55, 55 on the left and right are screwed and fastened to the side wall portion of the ceiling frame hanging material 4 by drill screws (or tapping screws) 58, 58, 58, 58, and are securely locked and fixed.

In this embodiment, the pair of loose holes 55a, 55a for adjusting the ceiling frame hanging material mounting position between the pair of opposing walls (fitting walls) 55, 55, the pair of bolt insertion holes 4a, 4a of the ceiling frame hanging material 4, the connecting bolt 56, the flat washer 56a, the spring washer 56b, and the fixing nut 56c constitute a ceiling frame hanging material connecting means having a ceiling frame hanging material mounting position adjustment function in the second fitting portion 5B. The outer shape of each of the connecting bolt 56, the flat washer 56a, the spring washer 56b, and the fixing nut 56c is formed to be larger than the width of the loose holes 55a, 55a.

The adjustment span (height adjustment range) of the ceiling frame hanging material attachment position in this ceiling frame hanging material connecting means portion is set by the vertical length of the pair of left and right loose holes 55a, 55a, and can be adjusted steplessly to the desired height, for example, between the highest position shown in Figure 19 and the lowest position shown in Figure 20. Moreover, this adjustment span is set sufficiently large so that the adjustment operation can be easily achieved by simply changing (loosening) the tightening state of the connecting bolt 56.

In this state, the ceiling frame hanging material mounting bracket 5 is firmly attached to the horizontal reinforcement 3 by screwing and fastening the high-rigidity vertical wall portion 51 common to the first fitting portion 5A and the second fitting portion 5B to the lip portions 3b, 3b of the horizontal reinforcement 3 with drill screws (or tapping screws) 57, 57, 57, 57 on the top and bottom of both the left and right sides of the reinforcement rib 54.

However, the lip channel steel that constitutes the horizontal reinforcement 3 is open on the lip portion 3b, 3b side, so when a large hanging force is applied to the lip portion 3b, 3b side, it tends to be easily deformed inward, making it difficult to maintain a stable hook surface (top surface) and a stable mounting surface (lip portion 3b, 3b surface).

However, as described above, when the vertical wall portion 51, which is the vertical wall portion of the first fitting portion 5A that contacts the lip portion 3b, 3b surface of the horizontal reinforcement member 3 during installation and is also the vertical wall portion of the second fitting portion 5B that fits the ceiling frame hanging member 4, 4, etc., is formed as a sufficiently rigid vertical wall portion 51 having a reinforcing rib 54 with a U-shaped cross section in the center, and when both the upper and lower ends, left and right sides are screwed and fastened to the lip portion 3b, 3b via drill screws (or tapping screws) 57, 57, 57, 57, respectively, the lip portion 3b, 3b of the horizontal reinforcement member 3 is firmly supported by the sufficiently rigid vertical wall portion 51 having the reinforcing rib 54 with a U-shaped cross section, and inward deformation does not occur even when a large hanging load is applied. As a result, it is possible to maintain a stable hook surface (top surface) on the horizontal reinforcement member 3 side and a stable mounting surface (lip portion 3b, 3b surface).

In addition, in this embodiment, a reinforcing rib 54 is provided that is located at the middle of the vertical width direction of the vertical wall portion 51, protrudes to a certain height, and has a U-shaped cross section that extends in a band shape in the vertical direction. The reinforcing rib 54 is provided in a state where it is integrally continuous with the top wall portion 52 of the first fitting portion 5A and the engaging wall portion 53 at its tip (see Figures 3, 6, 9 to 11). Therefore, the rigidity of not only the vertical wall portion 51 but also the top wall portion 52 and the engaging wall portion 53 is improved, and the hook function of the first fitting portion 5A side with respect to the stable hook surface (top surface) of the horizontal reinforcement member 3 side and the engagement function with the web surface 3a side are also more reliable. As a result, the mounting function of the ceiling frame hanging member 4 to the horizontal reinforcement member 3 by the ceiling frame hanging member mounting bracket 5 is more reliable, and the earthquake resistance strength is further improved.

The height of the reinforcement rib 54 protruding from the wall surface of the main body is set so that when the hook structure is fastened to the upper and lower lip portions 3b, 3b of the horizontal reinforcement member 3 by means of drill screws (or tapping screws) 57, 57, 57, 57, the heads of the drill screws (or tapping screws) 57, 57, 57, 57 do not interfere with the surface of the ceiling frame hanging members 4, 4... within the second fitting portion 5B (see Figures 3 and 6).

(Attachment structure of ceiling frame 8 to the lower end of ceiling frame hanging member 4: Figures 13 to 18)
On the other hand, the ceiling frame 8 (the joist support 1 portion of the ceiling frame 8) is further attached to the lower end of the ceiling frame hanging material 4, the upper end of which is firmly attached to the horizontal reinforcement material 3 as described above. The ceiling frame 8 is attached to the lower end of the ceiling frame hanging material 4 using a connecting fitting 6 with a function for adjusting the mounting position of the ceiling frame 8 (fine adjustment function), for example, as shown in Figures 13 to 18.

That is, the connecting fitting 6 with the function of adjusting the mounting position of the ceiling frame 8 is composed of a positioning fitting 6B attached to the front of the lower end of the ceiling frame hanging material 4 (the surface opposite to the surface attached to the soffit support 1), a fixing fitting 6A attached to the lower end of the ceiling frame hanging material 4 and the soffit support 1 via the positioning fitting 6B, a connecting bolt 12 that connects the fixing fitting 6A to the positioning fitting 6B in a height adjustment state in which it can be moved up and down and a fixed state in which it cannot be moved up and down, drill screws 13, 13 that screw and fix the positioning fitting 6B to the lower end of the ceiling frame hanging material 4, drill screws 14, 14 that screw and fix the fixing fitting 6A to the lower end of the ceiling frame hanging material, and drill screws 15, 15 that screw and fix the fixing fitting 6A to the ceiling frame side soffit support 1. The drill screws 14, 14 that screw and fix the fixing fitting 6A to the lower end of the ceiling frame hanging material may be one in the center instead of two at the top and bottom.

The positioning fitting 6B is made of a metal plate with an overall hat-shaped cross section, which includes a vertically long groove-shaped bolt attachment portion 61a, a vertically extending long hole (slot) 61b formed in the center of the bolt attachment portion 61a, flange-shaped fixing portions 61c, 61c formed integrally on both sides of the bolt attachment portion 61a, and drill screw insertion holes 61d, 61d provided in the center of the flange-shaped fixing portions 61c, 61c.

Then, the positioning bracket 6B first supports the connecting bolt 12 with the bolt shaft protruding forward from the long hole 61b and the head fitting within the groove with respect to the groove-shaped bolt mounting portion (C-shaped groove in cross section) 61a. Next, with the connecting bolt 12 supported, the flange-shaped fixing portions 61c, 61c are aligned (both vertically and horizontally) with the front surface (mounting surface) of the lower end of the ceiling frame hanging material 4, and then the drill screws 13, 13 are screwed into the lower end of the ceiling frame hanging material 4 through the drill screw insertion holes 61d, 61d, so that the connecting bolt 12 is securely fixed and attached to the front surface of the lower end of the ceiling frame hanging material 4.

In this case, the flange-shaped fixing parts 61c, 61c are aligned with the front (mounting surface) of the lower end of the ceiling frame hanging material 4 by butting the upper surfaces of the second engagement claws 61f, 61f provided on the left and right sides of the lower end surface of the positioning metal fitting 6B against the lower end surface of the ceiling frame hanging material 4, and by matching both side surfaces of the flange-shaped fixing parts 61c, 61c with both side surfaces of the ceiling frame hanging material 4. In other words, the left and right width dimensions of the positioning metal fitting 6B are formed to be equal to the left and right width dimensions of the ceiling frame hanging material 4.

The groove of the bolt mounting portion 61a is formed slightly deeper than the thickness of the bolt head of the connecting bolt 12, so that the bolt 12 itself can slide up and down via the bolt shaft even when the positioning bracket 6B is fixed to the lower end of the ceiling frame hanging material 4. The same applies to the relationship between the width of the long hole 61b and the diameter of the bolt shaft.

On the other hand, the fixing bracket 6A is made of a metal plate body 60 formed into an overall hat-shaped cross section as shown in FIG. 14, and includes a first fitting portion 60a for the ceiling frame hanging material 4 that is U-shaped in plan view, an elongated hole (slot) 60b formed in the base end wall (rear end wall) of the U-shaped portion of the first fitting portion 60a, drill screw insertion holes 60c, 60c, 60c, 60c formed in two places above and below the center of both left and right side walls of the first fitting portion 60a, and drill screw insertion holes 60c, 60c, 60c, 60c that are inserted into the drill screw insertion holes 60c, 60c, 60c, 60c. It is made up of drill screws 14, 14, 14, 14, second fitting parts 60d, 60d that are positioned outside (left and right sides) of the left and right side wall tips of the first fitting part 60a and are integrally provided (and crossed) with the ceiling frame (crossing direction soffit support 1) that is U-shaped when viewed from the side, drill screw insertion holes 60c, 60c formed in the center of the U-shaped base end wall (rear end wall) of the second fitting parts 60d, 60d, and drill screws 15, 15 that are inserted into the drill screw insertion holes 60c, 60c. The first fitting part 60a, which is U-shaped when viewed from the top, is adapted to be fitted from the front side to the lower end of the ceiling frame hanging material 4 made of the square steel pipe, and the second fitting parts 60d, 60d, which are U-shaped when viewed from the side in the cross direction, are adapted to be fitted to the side of the soffit support 1 of the ceiling frame made of the channel steel.

When the first fitting portion 60a of the fixing bracket 6A is fitted to the lower end of the ceiling frame hanging material 4 made of the square steel pipe, it is fitted via the positioning bracket 6B and the connecting bolt 12 attached to the bolt attachment portion 61a of the positioning bracket 6B. After fitting, it is connected by the connecting bolt 12, and until it is finally fastened and fixed via the washer 12a and nut 12b, it can slide freely up and down through the long hole 61b of the positioning bracket 6B and the long hole 60b of the fixing bracket 6A, and can be adjusted to a specified height position.

As already mentioned, the depth of the groove in the bolt attachment portion 61a of the positioning fitting 6B is slightly deeper than the thickness of the bolt head of the connecting bolt 12, so that even when the positioning fitting 6B is fixed to the lower end of the ceiling frame hanging material 10, the connecting bolt 12 itself can slide up and down using the bolt shaft according to the vertical length of the long hole 61b. The same applies to the relationship between the width of the long hole 61b and the diameter of the bolt shaft, and the bolt shaft of the connecting bolt 12 is loosely fitted with a gap that allows it to slide left and right, which allows the connecting bolt 12 to slide up and down.

The first fitting portion 60a of the fixing bracket 6A, which attaches the lower end of the ceiling frame hanging material 4 to the siding support 1, is first supported by the positioning bracket 6B fixed to the lower end of the ceiling frame hanging material 4 when it is fitted to the lower end of the ceiling frame hanging material 4. The tip bolt shaft (bolt shaft portion protruding from the long hole 61b) of the connecting bolt 12, which is held in a state in which it can slide up and down as described above, penetrates the long hole 60b of the base end wall of the U-shaped part on the fixing bracket 6A side, and is fastened and fixed by screwing the nut 12c through the washer 12b, which has a diameter larger than the diameter of the long hole 60b, at the protruding end side of the long hole 60b. In this case, the length of the left and right side wall portions of the first fitting portion 60a of the fixing bracket 6A is formed to a length that allows the second fitting portions 60d, 60d to be accurately fitted into the siding support 1, of course, taking into account the height dimension of the bolt mounting portion 61a of the positioning bracket 6B. In addition, the length relationship between the long hole 61b on the positioning bracket 6B side and the long hole 60b on the fixing bracket 6A side is such that the long hole 61b is much longer, while the long hole 60b is shorter, approximately twice the diameter of the bolt shaft of the connecting bolt 12. This is because, while the long hole 61b is used to adjust the height when the ceiling frame is attached to the ceiling frame hanging material 4 (when the sill support 1 is attached), the long hole 60b is used to make up for the adjustment dimension when the adjustment dimension is insufficient with only the long hole 61b, or to make fine level adjustments by operating only the fixing bracket 6A when finally fixing it.

With this configuration, for example, when finally attaching the ceiling frame 8 to the lower end of the vertical ceiling frame hanging material (square steel pipe) 4, which is firmly attached to the horizontal reinforcement 3, which is the ceiling frame mounting member, via the ceiling frame hanging material mounting bracket 5, the fixing bracket 6A can be moved up and down relative to the positioning bracket 6B (i.e., the ceiling frame hanging material 4) via the connecting bolt 12 as follows, and the mounting height can be adjusted using the length of the long hole 61b (and the long hole 60b). Then, the fixing bracket 6A, which is finally fixed to the lower end of the ceiling frame hanging material 4 and fits and fixes the soffit support 1 part of the ceiling frame 8, can be accurately attached at the appropriate mounting height. As a result, even if the soffit support 1 part of the ceiling frame 8 is deflected due to load, it can be corrected at that part and installed as horizontally as possible.

Moreover, in this embodiment, the fitting claws that are fitted to the ceiling frame hanging material 4 provided on the fitting body portion of the positioning fitting 6B are the first fitting claws 61e, 61e on both sides of the upper end of the positioning fitting 6B that are fitted to both the left and right sides of the ceiling frame hanging material 4, and the hook-shaped second fitting claws 61f, 61f on the left and right sides of the lower end of the positioning fitting 6B that are bent at a right angle horizontally from the front side to the back side and engage horizontally from the lower side to the left and right of the lower end of the positioning fitting 6B mounting portion of the ceiling frame hanging material 4. In this case, the first fitting claws 61e, 61e on both the left and right sides of the upper end are formed by bending a part of the left and right fitting body of the positioning fitting 6B 90 degrees toward the ceiling frame hanging material 4. On the other hand, the second engagement claws 61f, 61f on the left and right sides of the lower end are formed by bending part of the bottom of the main body of the positioning bracket 6B (part of both the left and right sides) at a right angle from the front side to the back side so that the lower end of the ceiling frame hanging material 4 can engage (forming a horizontal engagement edge).

With this configuration, when the positioning bracket 6B is fixed to the lower end of the ceiling frame hanging material 4, the hook-shaped second engaging claws 61f, 61f (see Figures 14, 15 and 17) bent at a right angle to the horizontal direction at the lower end of the positioning bracket 6B engage at a right angle with the lower end of the mounting surface of the positioning bracket 6B of the ceiling frame hanging material 4 to determine the mounting position in the vertical direction, and the first engaging claws 61e, 61e on both sides of the upper end of the positioning bracket 6B engage (embrace) with both sides of the ceiling frame hanging material 4 to determine the mounting position in the horizontal direction, and the entire structure can be securely temporarily fixed (see the state in Figure 18).

In other words, with this configuration, each of the top, bottom, left and right mounting positions can be accurately positioned, and then the mounting positions can be securely temporarily fixed, and then fixed with the drill screws 13, 13. As a result, the mounting position can be reliably maintained even if the worker does not support it with his or her hands, and even when the drill screws 13, 13 are screwed in, the mounting position can be accurately fixed without any misalignment.

As a result, not only is the workability when fixing the positioning bracket 6B to the ceiling frame hanging material 4 greatly improved, but it also becomes easier to adjust the attachment position of the fixing bracket 6A, which fits and fixes the ceiling frame 8, relative to the ceiling frame hanging material 4 via the positioning bracket 6B, improving the attachment accuracy of the ceiling frame 8 to the ceiling frame hanging material 4.

In this case, the second engagement claws 61f, 61f at the lower end of the positioning metal fitting 6B are bent at right angles to the horizontal direction, so that even if the ceiling frame hanging material 4, 4... has the above-mentioned interlocking portion (connecting portion) A (see Figure 27), it can be engaged in the state shown in Figure 18 without any problems.

As described above, in the configuration of the embodiment of this invention, the horizontal reinforcement members 3, 3... on the ceiling substrate side of the building and the ceiling frame suspension members 4, 4... that suspend the ceiling frame 8 from the horizontal reinforcement members 3, 3... on the ceiling substrate side are each composed of high-strength lip channel steel with a roughly rectangular cross section and square steel pipes with a square cross section (see Figures 1 to 9, 11, 12, etc.).

As a result, not only does the rigidity and strength of the horizontal reinforcement members 3, 3... on the ceiling base to which the ceiling frame suspension members 4, 4... are attached increase, but the strength of the ceiling frame suspension members 4, 4... themselves against vertical compressive and tensile loads, their rigidity in the direction perpendicular to the axis, and their horizontal strength are also greatly improved compared to the conventional bolt shaft alone (the configuration of Patent Document 1).

As a result, it is possible to construct a suspended ceiling with a wind pressure-resistant structure that can withstand cases where upward wind pressure acts on the ceiling frame hanging parts and a large compressive load is placed on the ceiling frame hanging materials 4, 4...

Moreover, in this configuration, the upper ends of the ceiling frame hanging members 4, 4... are connected vertically to the ceiling base horizontal reinforcement members 3, 3... via ceiling frame hanging member mounting brackets 5, while the lower ends of the ceiling frame hanging members 4, 4... are connected to the ceiling frame 8 via connecting brackets 6 equipped with a ceiling frame mounting position adjustment function (see Figures 2, 3, 6, 9, 11, and 13 to 18).

The ceiling frame suspension material mounting bracket 5, which connects the upper end of the ceiling frame suspension material 4, 4... to the ceiling base horizontal reinforcement material 3, 3... in a vertical state, is composed of a first fitting portion 5A with a hook structure that slidably fits into the horizontal reinforcement material 3, 3... from above and engages the ceiling frame suspension material mounting bracket 5 to the horizontal reinforcement material 3, 3..., and a second fitting portion 5B with a U-shaped cross section that is located in the vertical wall portion 51 portion that abuts against the side surface (lip portion 3b, 3b surface) of the horizontal reinforcement material 3, 3... of the first fitting portion 5A and slides into the upper end of the ceiling frame suspension material 4, 4... from the side. The second fitting portion 5B is provided with a connecting means having a ceiling frame suspension material mounting position adjustment function that adjusts the mounting position of the upper end of the ceiling frame suspension material 4, 4... to a predetermined height position between the ceiling frame suspension material 4, 4... and the ceiling frame suspension material 4, 4....

Therefore, when connecting the upper end of the ceiling frame suspension material 4, 4... to the horizontal reinforcement material 3, 3... on the ceiling substrate side via the ceiling frame suspension material mounting bracket 5, first, the first fitting portion 5A of the hook structure of the ceiling frame suspension material mounting bracket 5 is simply fitted from above into the horizontal reinforcement material 3, 3..., and the ceiling frame suspension material mounting bracket 5 can be easily engaged in a slidable manner with the upper part of the horizontal reinforcement material 3, 3..., and the positioning can be easily adjusted in this engaged state. After that, it can be reliably maintained in a stable engagement state, and it does not easily shift position as in the case of the configuration of Patent Document 2.

As a result, the installation work using two drill screws (or tapping screws) 57, 57, 57, 57 on each side of the lip portion 3b, 3b of the horizontal reinforcement material 3, 3... with which the first fitting portion 5A abuts is also easier. In addition, the mounting strength of the ceiling frame hanging material mounting bracket 5 to the horizontal reinforcement material 3, 3... is also improved.

On the other hand, the second fitting portion 5B to which the upper end of the ceiling frame hanging member 4, 4... is attached is integrated with the vertical wall portion 51 that abuts against the lip portion 3b, 3b surface of the horizontal reinforcement member 3, 3... of the first fitting portion 5A, and is formed into a fitting portion with a U-shaped cross section that slidably fits the upper end of the ceiling frame hanging member 4, 4... from the side.

Therefore, unlike the case of the cylindrical structure such as Patent Document 2, the fitting of the ceiling frame hanging members 4, 4... is extremely easy, and the sliding operation (positioning operation) in the vertical direction after fitting is also easy. In addition, the vertical wall portion 51 of the first fitting portion 5A is provided in a shape corresponding to the entire lip portion 3b, 3b surface of the horizontal reinforcement member 3, 3..., and the second fitting portion 5B with a U-shaped cross section is also formed in a shape corresponding to the entire lip portion 3b, 3b surface of the horizontal reinforcement member 3, 3.... Therefore, the vertical wall portion 51 of the first fitting portion 5A abuts against the entire lip portion 3b, 3b surface of the horizontal reinforcement member 3, 3..., effectively reinforcing the lip portion 3b, 3b surface of the horizontal reinforcement member 3, 3..., and is further effectively reinforced by the second fitting portion 5B with a U-shaped cross section having a pair of opposing walls 55, 55, resulting in a very high rigidity. As a result, the strength and rigidity of both the first fitting portion 5A and the second fitting portion 5B are high, and the connection strength of the upper end of the ceiling frame hanging member 4, 4... to the horizontal reinforcement member 3, 3... is also improved.

Moreover, the second fitting portion 5B, which has a U-shaped cross section, is provided with a connecting means having a ceiling frame hanging material mounting position adjustment function that adjusts the mounting position of the upper end of the ceiling frame hanging material 4, 4... to a predetermined height position between the ceiling frame hanging material 4, 4... as described above.

Therefore, as already mentioned, even if there is an unexpected deflection (height fluctuation) on the ceiling frame 8 side and the final fine adjustment cannot be handled by the ceiling frame attachment means at the lower end of the ceiling frame hanging material 4, 4..., i.e., the ceiling frame attachment position adjustment function of the connecting metal fitting 6 part, it is possible to easily adjust it at the upper end attachment part of the ceiling frame hanging material 4, 4.... Moreover, as shown in Figures 19 and 20 above, the ceiling frame hanging material attachment position adjustment function of the connecting metal fitting 6 part is set to a considerably larger adjustable span amount than the adjustment span of the ceiling frame attachment position adjustment function of the connecting metal fitting 6 part.

For this reason, in the case of this embodiment, the positioning of the connecting parts at the upper ends of the ceiling frame hanging members 4, 4... does not need to be performed precisely in consideration of the final amount of deflection of the ceiling frame 8. Instead, it is sufficient to position them at a certain level and then finally adjust them to an accurate mounting position in relation to the ceiling frame mounting position adjustment function of the connecting metal fittings 6, which makes the installation of the ceiling frame hanging members 4, 4... to the horizontal reinforcements 3, 3... much easier.

As described above, the connecting means with the ceiling frame hanging material mounting position adjustment function on the upper end side of the ceiling frame hanging material 4, 4... is composed of loose holes 55a, 55a of a predetermined length extending in the vertical direction provided in the opposing walls 55, 55 that sandwich the ceiling frame hanging material 4, 4... of the second fitting portion 5B, bolt insertion holes 4a, 4a provided in the ceiling frame hanging material 4, 4..., a connecting bolt 56 that connects and fixes the second fitting portion 5B and the ceiling frame hanging material 4, 4... via the loose holes 55a, 55a and the bolt insertion holes 4a, 4a, a flat washer 56a on the head side of the connecting bolt 56, a spring washer 56b on the end side of the connecting bolt 56, and a fastening and fixing nut 56c on the end side of the connecting bolt 56 (see Figures 7 to 9 and 12).

In this configuration, the upper end of the ceiling frame hanging material 4, 4... is fitted into the second fitting portion 5B and positioned by sliding it up and down. In this state, the connecting bolt 56 is passed through the loose holes 55a, 55a of the opposing walls 55, 55 of the second fitting portion 5B and the bolt insertion holes 4a, 4a of the ceiling frame hanging material 4, 4..., and connected via the flat washer 56a, spring washer 56b, and fastening nut 56c (see Figures 12, 7, and 8), allowing it to be securely fixed in the positioned position, and the upper end of the ceiling frame hanging material 4, 4... is securely connected and fixed to the ceiling base horizontal reinforcement material 3, 3... via the ceiling frame hanging material mounting bracket 5 (see Figures 1 to 8).

After this connection and fixing, the lower ends of the ceiling frame hanging members 4, 4... are attached to the ceiling frame 8 after finely adjusting the mounting position (level) as described above via the connecting fittings 6 equipped with the ceiling frame mounting position adjustment function.

In this case, if there is a greater-than-expected deflection (height fluctuation) on the ceiling frame 8 side and the ceiling frame mounting position adjustment span of the lower end connecting fitting 6 of the ceiling frame hanging material 4, 4... is not sufficient, the connection state of the connecting bolt 56, which is the ceiling frame hanging material connecting means of the upper end side second fitting portion 5B of the ceiling frame hanging material 4, 4... is released, and the necessary height position adjustment is made again at the upper end side connecting portion of the ceiling frame hanging material 4, 4... (raising and lowering the connecting bolt 56 along the loose holes 55a, 55a), and in combination with the ceiling frame mounting position adjustment function of the lower end connecting fitting 6 of the ceiling frame hanging material 4, 4..., the ceiling frame 8 can be installed at as uniform a level as possible.

Therefore, according to this configuration, the entire ceiling frame 8 can be attached at as uniform a level as possible, which significantly facilitates the installation work and the installation position adjustment work.
In addition, in the above configuration, the main body portion (vertical wall portion 51 to top wall portion 52 to engaging wall portion 53) of the hook-structured ceiling frame hanging material mounting bracket 5 having the first and second engaging portions 5A and 5B is provided with a reinforcing rib 54 located in the middle of the left and right width direction and extending in a band-like shape over the entire first and second engaging portions 5A and 5B (see Figures 2, 3, and 9 to 12).

This configuration greatly improves the rigidity of the main body of the ceiling frame suspension material mounting bracket 5, which has a hook structure with first and second fitting portions 5A, 5B, and greatly improves the mounting strength to each of the horizontal reinforcements 3, 3... and the ceiling frame suspension materials 4, 4..., as well as the mutual connection strength between the horizontal reinforcements 3, 3... and the ceiling frame suspension materials 4, 4.... As a result, earthquake resistance is improved.

In this case, the height of the reinforcing rib 54 is higher than the height of the heads of the drill screws (or tapping screws) 57, 57, 57, 57 that fasten the ceiling frame hanging material mounting bracket 5 itself to the lip portions 3b, 3b of the horizontal reinforcing members 3, 3, . . . that are screwed into both the left and right sides of the reinforcing rib 54 (see Figures 6 and 8). Therefore, the ceiling frame hanging materials 4, 4, . . . that are fitted into the second fitting portion 5B of the ceiling frame hanging material mounting bracket 5 slide smoothly without coming into contact with the heads of the drill screws (or tapping screws) 57, 57, 57, 57, 57. As a result, the above-mentioned mounting position can be easily adjusted.

<Regarding the ceiling frame suspension structure according to the second embodiment of the present invention: Figs. 21 to 23>
In the configuration of embodiment 1 shown in Figures 1 to 20 above, a case has been described in which the horizontal reinforcement members 3, 3... on the ceiling substrate side are lip channel steel, and the ceiling frame suspension members 4, 4... are square steel pipes as shown in Figure 27. However, the configuration of the ceiling frame suspension member mounting bracket 5 described above can also be applied in exactly the same way to a case in which the horizontal reinforcement members 3 on the ceiling substrate side are lip channel steel with a roughly rectangular cross-section that is long in the vertical direction, and the ceiling frame suspension members 4, 4... are lip channel steel with a roughly square cross-section, as shown in Figures 21 to 23.

When the ceiling frame suspension materials 4, 4... are lip channel steel, the opposite side of the web is an open surface with lip portions 4b, 4b, and although it is not a closed cross-section structure like a square steel pipe, it has sufficient compressive load resistance and tensile load strength similar to that of a square steel pipe, and also has high rigidity in the direction perpendicular to the axis. Therefore, it can achieve a ceiling frame suspension strength improvement effect similar to that of a square steel pipe, and an effective vibration resistance improvement effect against horizontal excitation forces during an earthquake.

However, in the case of lip channel steel, since the opposite side of the web portion is an open surface having lip portions 4b, 4b, a sleeve-structured spacer 50 is interposed between the bolt insertion holes 4a, 4a, and the connecting bolt 56 is inserted through the spacer 50. In this way, the support rigidity (compressive load strength) of the connecting portion during connection is increased, and a connecting strength superior to that of a square steel pipe can be obtained.

<Regarding the ceiling frame suspension structure according to the third embodiment of the present invention: FIG. 24>
In the configuration of embodiment 1 shown in Figures 1 to 20 above, a case has been described in which the horizontal reinforcement members 3, 3... on the ceiling substrate side are lip channel steel, and the ceiling frame suspension members 4, 4... are square steel pipes as shown in Figure 27. However, the configuration of the ceiling frame suspension member mounting bracket 5 described above can also be applied in exactly the same way to a case in which the horizontal reinforcement members 3 on the ceiling substrate side are square steel pipes with a rectangular cross section that are long in the vertical direction, and the ceiling frame suspension members 4, 4... are square steel pipes with a square cross section, as shown in Figure 24, for example.

Square steel pipes are closed cross-section structures that have sufficient compressive load resistance and tensile load strength, and also have high rigidity in the direction perpendicular to the axis. Therefore, by using square steel pipes for each of the horizontal reinforcement members 3, 3... and the ceiling frame suspension members 4, 4..., it is possible to achieve a more sufficient improvement in the ceiling frame suspension strength and a more effective improvement in vibration resistance against horizontal excitation forces during earthquakes.

<Regarding the ceiling frame suspension structure according to the fourth embodiment of the present invention: FIG. 25>
In the configuration of embodiment 1 shown in Figures 1 to 20 above, a case has been described in which the horizontal reinforcement members 3, 3... on the ceiling substrate side are lip channel steel, and the ceiling frame suspension members 4, 4... are square steel pipes as shown in Figure 27. However, the configuration of the ceiling frame suspension member mounting bracket 5 described above can also be applied in exactly the same way to a case in which the horizontal reinforcement members 3 on the ceiling substrate side are square steel pipes with a rectangular cross section that are long in the vertical direction, as in embodiment 3, and the ceiling frame suspension members 4, 4... are lip channel steel with an approximately square cross section, as in embodiment 2, as shown in Figure 25, for example.

Square steel pipes are closed cross-section structures that have sufficient compressive load resistance and tensile load strength, and also have high rigidity in the direction perpendicular to the axis. Therefore, by using square steel pipes for the horizontal reinforcement members 3, 3..., the same parts can achieve a more sufficient improvement in the ceiling frame suspension strength and a more effective improvement in vibration resistance against horizontal excitation forces during earthquakes.

On the other hand, in the case of lip channel steel, the opposite side of the web portion is an open surface with lip portions 4b, 4b, and although it is not a closed cross-section structure like a square steel pipe, it has sufficient compressive load resistance strength and tensile load strength similar to that of a square steel pipe, and also has high rigidity in the direction perpendicular to the axis. Therefore, it can achieve a ceiling frame suspension strength improvement effect similar to that of a square steel pipe, and an effective vibration resistance improvement effect against horizontal excitation forces during an earthquake.

However, in the case of lip channel steel, since the opposite side of the web portion is an open surface having lip portions 4b, 4b, a sleeve-structured spacer 50 is interposed between the bolt insertion holes 4a, 4a as in the second embodiment, and the connecting bolt 56 is inserted through the spacer 50. In this way, the support rigidity (compressive load strength) of the connecting portion during connection is increased, and a connecting strength superior to that of a square steel pipe can be obtained.

<Regarding the ceiling frame suspension structure according to the fifth embodiment of the present invention: Figs. 26 to 36>
26 to 36 show a ceiling frame hanging structure according to embodiment 5 of the present invention. In the ceiling frame hanging structures according to embodiments 1 to 4 described above, the second fitting portion 5B is configured by utilizing the vertical wall portion 51 of the first fitting portion 5A, and the vertical wall portion 51 having the reinforcing rib 54 of the first fitting portion 5A and a pair of opposing walls (opposing walls for forming the fitting portion) 55, 55 provided on both sides of the vertical wall portion 51 form a ceiling frame hanging material fitting portion having a three-sided structure with a U-shaped horizontal cross section (when viewed from above).

That is, in this configuration, a pair of opposing walls (fitting walls) 55, 55 that fit horizontally from the side to the ceiling frame hanging material 4 made of vertically extending square steel pipes (or lip channel steel) are provided on the left and right sides of the vertical wall portion 51 of the first fitting portion 5A, forming a fitting portion with a U-shaped cross section that can slide up and down with the ceiling frame hanging material 4, 4... made of vertically extending square steel pipes (or lip channel steel) by three wall surfaces, the vertical wall portion 51 surface having the reinforcing rib 54 of the first fitting portion 5A and the pair of opposing walls (fitting walls) 55, 55 surfaces on both sides. The width of the pair of opposing walls (fitting walls) 55, 55 corresponds to the width of the side wall portion of the ceiling frame hanging material 4, 4... made of square steel pipes (or lip channel steel).

Then, in the left-right center of the pair of left and right opposing walls (fitting walls) 55, 55, there are provided loose holes (long holes) 55a, 55a for adjusting the mounting position (height) of the ceiling frame hanging material 4, which extends a predetermined length in the up-down vertical direction. In addition, in the lower left corner of the pair of left and right opposing walls (fitting walls) 55, 55, there are provided screw holes 55b, 55b, 55b, 55b, which are spaced apart in the up-down direction and use drill screws (or tapping screws) 58, 58, 58, 58 to fix the second fitting portion 5B to the ceiling frame hanging material 4 made of a square steel pipe (or lip channel steel).

On the other hand, on both the left and right side wall portions of the ceiling frame hanging material 4 made of a square steel pipe (or lip channel steel), for example at the upper 2/3 height portion in the vertical direction, bolt insertion holes 4a, 4a that penetrate both inward and outward are provided (see Figures 9, 22, etc.). Then, a ceiling frame hanging material 4 made of a square steel pipe (or lip channel steel) is fitted into the second fitting portion 5B into the loose holes (long holes) 55a, 55a for adjusting the ceiling frame hanging material attachment position (height) of the pair of left and right opposing walls (fitting walls) 55, 55 and the bolt insertion holes 4a, 4a of the ceiling frame hanging material 4, and when a certain height adjustment (level adjustment) has been made, a connecting bolt 56 is inserted, and the pair of left and right opposing walls (fitting walls) 55, 55 and the ceiling frame hanging material 4 are connected and fixed to each other via flat washers 56a, spring washers 56b, and fixing nuts 56c (see Figures 12, 23, etc.) (see Figures 2 to 8, 20, 21, 24, 25, etc.). After the connecting bolt 56, flat washer 56a, spring washer 56b, and fixing nut 56c are connected and fixed, the pair of opposing walls (engagement walls) 55, 55 on the left and right are screwed and fastened to the side wall portion of the ceiling frame hanging material 4 by drill screws (or tapping screws) 58, 58, 58, 58, and are securely locked and fixed.

The loose holes 55a, 55a for adjusting the ceiling frame hanging material mounting position between the pair of opposing left and right walls (engagement walls) 55, 55, the bolt insertion holes 4a, 4a of the ceiling frame hanging material 4, the connecting bolt 56, the flat washer 56a, the spring washer 56b, and the fixing nut 56c constitute the ceiling frame hanging material connecting means with the function of adjusting the ceiling frame hanging material mounting position in the second engagement portion 5A.

The adjustment span (height adjustment range) of the ceiling frame hanging material attachment position in this ceiling frame hanging material connecting means portion is set by the vertical length of the loose holes 55a, 55a, and can be adjusted to the desired height, for example, between the highest position shown in Figure 19 and the lowest position shown in Figure 20 (Figures 21, 24, and 25 are approximately intermediate positions). Moreover, the adjustment span is set sufficiently large, and the adjustment operation can be easily achieved by changing (loosening) the tightening state of the connecting bolt.

The ceiling frame hanging material mounting bracket 5 is firmly attached to the horizontal reinforcement member 3 by screwing and fastening the upper and lower parts of both the left and right sides of the reinforcing rib 54 of the highly rigid vertical wall portion 51 of the second fitting portion 5B, which forms part of the first fitting portion 5A, to the side wall of the horizontal reinforcement member 3 made of the square steel pipe (or the lip portion 3b, 3b of the horizontal reinforcement member 3 made of lip channel steel) with drill screws (or tapping screws) 57, 57, 57, 57.

In this configuration, the pair of opposing left and right walls 55, 55 of the second fitting portion 5B of the ceiling frame hanging material mounting bracket 5 are sandwiched plates with a flat structure that opens to the side in accordance with the sidewall width of the ceiling frame hanging material 4, 4..., so that the ceiling frame hanging material 4, 4... can be fitted to the second fitting portion 5B portion simply by fitting them horizontally from the side, making the fitting operation easy. In addition, since the fitting portion is completely open to the horizontal side, it is also easy to screw and fasten the left and right sides of the reinforcing rib 54 of the vertical wall portion 51 to the horizontal reinforcing material 3 with drill screws (or tapping screws) 57, 57, 57, 57.

However, with this configuration, although the fitting operation itself is easy, the problem remains of the difficulty of maintaining the fitted ceiling frame hanging material 4 in an accurate positioning state after fitting into the second fitting portion 5B.

That is, in the case of this configuration, the ceiling frame hanging material 4 fitted into the second fitting portion 5B is prone to moving (not locked) to the open side, so it is difficult to reliably fit into the second fitting portion 5B and maintain it in a stable vertical state. Therefore, it is not necessarily easy to insert the connecting bolt 56 into the bolt insertion holes 4a, 4a of the ceiling frame hanging material 4 through the one-side loose hole (long hole) 55a for adjusting the ceiling frame hanging material mounting position (height) provided in the pair of left and right opposing walls 55, 55, and to protrude the bolt tip toward the other side loose hole (long hole) 55a. Then, after adjusting the height position, the pair of opposing walls (engagement walls) 55, 55 on the left and right sides are screwed into the side walls of the ceiling frame hanging material 4 with drill screws (or tapping screws) 58, 58, 58, 58. However, even in this case, the loose holes (long holes) 55a, 55a may be loose, making it difficult to securely fit the ceiling frame hanging material 4 into the second engagement portion 5B while it is abutting against the reinforcing rib 54 of the vertical wall portion 51, and to maintain a reliable vertical state before screwing and fastening it.

In this embodiment, as shown in Figures 26 to 31, for example, a pair of opposing left and right walls 55, 55 of the second fitting portion 5B of the ceiling frame hanging material mounting bracket 5 are provided with locking pieces 59, 59 that prevent the fitted ceiling frame hanging material 4 from moving toward the open opening, and the ceiling frame hanging material 4 is fitted into the second fitting portion 5B by inserting it from above to below or from below to above, so that the ceiling frame hanging material 4 fitted into the second fitting portion 5B is reliably maintained in a vertical state while abutting against the reinforcing rib 54 of the vertical wall portion 51.

With this configuration, all that is required is to adjust the height position, and it becomes easy to insert the connecting bolt 56 into the bolt insertion holes 4a, 4a of the ceiling frame hanging material 4 through the loose hole (long hole) 55a on one side for adjusting the ceiling frame hanging material mounting position (height) provided on the pair of opposing left and right walls 55, 55, and to protrude the bolt tip toward the loose hole (long hole) 55a on the other side. In addition, as a result, the bolt axis position of the connecting bolt 56 is naturally positioned at the widthwise center position of the loose hole (long hole) 55a, making it possible to tighten at an accurate position.

In addition, in this state, the ceiling frame hanging material 4 fitted into the second fitting portion 5B is maintained in an accurate vertical state while being securely abutted against the reinforcing rib 54 of the vertical wall portion 51, so that the subsequent screw fastening of the pair of left and right opposing walls (fitting walls) 55, 55 to the side wall portion of the ceiling frame hanging material 4 using the drill screws (or tapping screws) 58, 58, 58, 58 can be performed in an accurate position without being affected by the hole diameter of the loose holes (long holes) 55a, 55a.

Furthermore, providing the locking pieces 59, 59 as described above also improves the strength of the second fitting portion 5B. Note that with this configuration, it is no longer possible to fit the ceiling frame hanging material 4 from the side as in embodiments 1 to 4, but unlike the conventional one shown in Figure 42, there is only one fitting portion, and it can be freely inserted and fitted from the top or bottom, so the fitting operation itself is easy.

In this case, the locking pieces 59, 59 on the open end side of the pair of left and right opposing walls 55, 55 can be formed by bending the entire pair of left and right opposing walls 55, 55 at a right angle inward by a predetermined width so that they face each other, as shown in Figure 30, for example. However, in this case, it is necessary to change the screwing positions of the drill screws (or tapping screws) 57, 57, 57, 57 on both the left and right sides of the reinforcing rib 54 of the vertical wall portion 51 relative to the horizontal reinforcement member 3 to inner positions (positions adjacent to the reinforcing rib 54) that are not restricted by the locking pieces 59, 59 (if not changed, it will be difficult to knead the drill screws (or tapping screws) 57, 57, 57, 57 due to the presence of the locking pieces 59, 59). On the other hand, if the screwing positions of the drill screws (or tapping screws) 57, 57, 57, 57 are changed to an inner position (adjacent to the reinforcing rib 54) that is not restricted by the locking pieces 59, 59, the left-right width between the screwing positions becomes narrower, so the fastening strength of the vertical wall portion 51 to the horizontal reinforcing member 3 decreases relatively.

In this embodiment, the locking pieces 59, 59 on the open end side of the pair of left and right opposing walls 55, 55 are provided only in the middle between them, excluding the part corresponding to the screwing position of the drill screw (or tapping screw) 57, 57, 57, 57 (parts a, a, b, b in FIG. 29), rather than on the entire pair of left and right opposing walls 55, 55, as shown in, for example, FIG. 28 and FIG. 29. With this configuration, the drill screw (or tapping screw) 57, 57, 57, 57 can be freely screwed without being affected by the locking pieces 59, 59. In addition, sufficient fastening strength of the vertical wall portion 51 to the horizontal reinforcement material 3 can be achieved without narrowing the left and right width between the screwing positions. In this case, the locking pieces 59, 59 are also formed by the same bending process.

In this embodiment, as in the above-mentioned embodiments 1 to 4, the ceiling frame 8 is suspended from the lower end of the ceiling frame hanging member 4, as shown in FIG. 26, for example. The ceiling frame 8 is attached to the lower end of the ceiling frame hanging member 4 using a connecting fitting 6, as shown in FIG. 27, for example, which has a function for adjusting the mounting position of the ceiling frame 8 (fine adjustment function).

That is, the connecting fitting 6 with the function of adjusting the mounting position of the ceiling frame 8 is composed of a positioning fitting 6B attached to the front of the lower end of the ceiling frame hanging material 4 (the surface opposite to the surface attached to the soffit support 1), a fixing fitting 6A attached to the lower end of the ceiling frame hanging material 4 and the soffit support 1 via the positioning fitting 6B, a connecting bolt 12 that connects the fixing fitting 6A to the positioning fitting 6B in a height adjustment state in which it can be moved up and down and in a fixed state in which it cannot be moved up and down, drill screws 13, 13 that screw and fix the positioning fitting 6B to the lower end of the ceiling frame hanging material 4, drill screws 14, 14 that screw and fix the fixing fitting 6A to the lower end of the ceiling frame hanging material, and drill screws 15, 15 that screw and fix the fixing fitting 6A to the ceiling frame side soffit support 1.

As shown in Figures 27 and 34 to 36, the positioning fitting 6B is made of a metal plate with a hat-shaped cross section as a whole, which includes a vertically long groove-shaped bolt attachment portion 61a, a vertically extending long hole (slot) 61b formed in the center of the bolt attachment portion 61a, flange-shaped fixing portions 61c, 61c formed integrally on both sides of the bolt attachment portion 61a, and drill screw insertion holes 61d, 61d provided in the center of the flange-shaped fixing portions 61c, 61c (not visible in Figure 27 because the drill screws 13, 13 are screwed in).

Then, the positioning bracket 6B first supports the connecting bolt 12 in the groove-shaped bolt mounting portion (C-shaped groove in cross section) 61a with the bolt shaft protruding forward from the long hole 61b and the head fitting within the groove. Next, with the connecting bolt 12 supported, the flange-shaped fixing portions 61c, 61c are aligned (both vertically and horizontally) with the front surface (mounting surface) of the lower end of the ceiling frame hanging material 4, and then the drill screws 13, 13 are screwed into the lower end of the ceiling frame hanging material 4 through the drill screw insertion holes 61d, 61d, so that the connecting bolt 12 is securely fixed and attached to the front surface of the lower end of the ceiling frame hanging material 4.

In this case, the flange-shaped fixing parts 61c, 61c are aligned with the front (mounting surface) of the lower end of the ceiling frame hanging material 4 by butting the upper surfaces of the second engagement claws 61f, 61f provided on the left and right sides of the lower end surface of the positioning metal fitting 6B against the lower end surface of the ceiling frame hanging material 4, and by matching both side surfaces of the flange-shaped fixing parts 61c, 61c with both side surfaces of the ceiling frame hanging material 4. In other words, the left and right width dimensions of the positioning metal fitting 6B are formed to be equal to the left and right width dimensions of the ceiling frame hanging material 4 (see Figures 32 and 33).

The groove of the bolt mounting portion 61a is formed slightly deeper than the thickness of the bolt head of the connecting bolt 12, so that the bolt 12 itself can slide up and down via the bolt shaft even when the positioning bracket 6B is fixed to the lower end of the ceiling frame hanging material 4. The same applies to the relationship between the width of the long hole 61b and the diameter of the bolt shaft.

On the other hand, the fixing bracket 6A, like that shown in FIG. 14 of the first embodiment, is made of a metal plate body 60 formed into a hat-shaped cross section as a whole, and includes a first fitting portion 60a for the ceiling frame hanging material 4 which is U-shaped in plan view, an elongated hole (slot) 60b formed in the base end wall (rear end wall) of the U-shaped portion of the first fitting portion 60a, drill screw insertion holes 60c, 60c, 60c, 60c formed in two places, one above the other, in the center of the left and right side walls of the first fitting portion 60a, and a drill screw insertion hole 60c, 60c, 60c, 60c formed in the drill screw insertion holes 60c, 60c, 60c, 60c. It consists of drill screws 14, 14, 14, 14 that are inserted, second fitting portions 60d, 60d that fit into a C-shaped ceiling frame (a sill support 1 in the cross direction) that is located outside (on both left and right sides) of the tips of both left and right side walls of the first fitting portion 60a and is integrally formed (and crosses) with the first fitting portion 60a, drill screw insertion holes 60c, 60c formed in the center of the base end wall (rear end wall) of the C-shaped portion of the second fitting portions 60d, 60d, and drill screws 15, 15 that are inserted into the drill screw insertion holes 60c, 60c. The first fitting portion 60a, which is U-shaped when viewed from above, is adapted to fit from the front side into the lower end of the ceiling frame hanging material 4, which is made of the above-mentioned square steel pipe (or lip channel steel), and the second fitting portions 60d, 60d, which are U-shaped when viewed from the side in the cross direction, are adapted to fit into the side of the ceiling frame sill support 1, which is made of the above-mentioned channel steel.

When the first fitting portion 60a of the fixing bracket 6A is fitted to the lower end of the ceiling frame hanging material 4 made of the square steel pipe, it is fitted via the positioning bracket 6B and the connecting bolt 12 attached to the bolt attachment portion 61a of the positioning bracket 6B. After fitting, it is connected by the connecting bolt 12, and until it is finally fastened and fixed via the washer 12a and nut 12b, it can slide freely up and down through the long hole 61b of the positioning bracket 6B and the long hole 60b of the fixing bracket 6A, and can be adjusted to a specified height position.

As already mentioned, the depth of the groove in the bolt attachment portion 61a of the positioning fitting 6B is slightly deeper than the thickness of the bolt head of the connecting bolt 12, so that even when the positioning fitting 6B is fixed to the lower end of the ceiling frame hanging material 10, the connecting bolt 12 itself can slide up and down using the bolt shaft according to the vertical length of the long hole 61b. The same applies to the relationship between the width of the long hole 61b and the diameter of the bolt shaft, and the bolt shaft of the connecting bolt 12 is loosely fitted with a gap that allows it to slide left and right, which allows the connecting bolt 12 to slide up and down.

The first fitting portion 60a of the fixing bracket 6A, which attaches the lower end of the ceiling frame hanging material 4 to the siding support 1, is first supported by the positioning bracket 6B fixed to the lower end of the ceiling frame hanging material 4 when it is fitted to the lower end of the ceiling frame hanging material 4. The tip bolt shaft of the connecting bolt 12 (the bolt shaft portion protruding from the long hole 61b) which is held in a state in which it can slide up and down as described above penetrates the long hole 60b in the base end wall of the U-shaped part on the fixing bracket 6A side, and is fastened and fixed by screwing the nut 12c through the washer 12b whose diameter is larger than the diameter of the long hole 60b at the protruding end side of the long hole 60b. In this case, the length of the left and right side wall portions of the first fitting portion 60a of the fixing bracket 6A is formed to a length that allows the second fitting portions 60d, 60d to be accurately fitted into the siding support 1, taking into account the height dimension of the bolt mounting portion 61a of the positioning bracket 6B. In addition, the length relationship between the long hole 61b on the positioning bracket 6B side and the long hole 60b on the fixing bracket 6A side is such that the long hole 61b is much longer, while the long hole 60b is shorter, approximately twice the diameter of the bolt shaft of the connecting bolt 12. This is because, while the long hole 61b is used to adjust the height when the ceiling frame is attached to the ceiling frame hanging material 4 (when the sill support 1 is attached), the long hole 60b is used to make up for the adjustment dimension when the adjustment dimension is insufficient with only the long hole 61b, or to make fine level adjustments by operating only the fixing bracket 6A when finally fixing it.

With this configuration, for example, when finally attaching the ceiling frame 8 to the lower end of the vertical ceiling frame hanging material (square steel pipe) 4, which is firmly attached to the horizontal reinforcement 3, which is the ceiling frame mounting member, via the ceiling frame hanging material mounting bracket 5, the fixing bracket 6A can be moved up and down relative to the positioning bracket 6B (i.e., the ceiling frame hanging material 4) via the connecting bolt 12 as follows, and the mounting height can be adjusted using the length of the long hole 61b (and the long hole 60b). Then, the fixing bracket 6A, which is finally fixed to the lower end of the ceiling frame hanging material 4 and fits and fixes the soffit support 1 part of the ceiling frame 8, can be accurately attached at the appropriate mounting height. As a result, even if the soffit support 1 part of the ceiling frame 8 is deflected due to load, it can be corrected at that part and installed as horizontally as possible.

In addition, in this embodiment, the fitting claws that are fitted to the ceiling frame hanging material 4 provided on the fitting body portion of the positioning fitting 6B are made up of first fitting claws 61e, 61e on both sides of the upper end of the positioning fitting 6B that are fitted to the left and right sides of the ceiling frame hanging material 4, and second hook-shaped fitting claws 61f, 61f that are bent in a U-shape from the front side to the back side and are horizontally engaged from below to the left and right sides of the lower end of the positioning fitting 6B mounting portion of the ceiling frame hanging material 4 on the left and right sides of the lower end of the positioning fitting 6B (see Figures 32 and 33).

In this case, the first engagement claws 61e, 61e on both the left and right sides of the upper end are formed by bending a portion of the left and right sides of the main body of the positioning bracket 6B 90 degrees toward the ceiling frame hanging material 4. On the other hand, the second engagement claws 61f, 61f on the left and right sides of the lower end are formed by first bending a portion of the bottom of the main body of the positioning bracket 6B (a portion of both the left and right sides) at a right angle horizontally from the front side to the back side so that it can engage the lower end of the ceiling frame hanging material 4, and then bending the tip 61g, 61g of the bent portion bent at a right angle in the horizontal direction at a right angle upwards to a specified height, leaving a specified horizontal engagement surface, to form a U-shape (see Figures 34 to 36).

With this configuration, when the positioning bracket 6B is fixed to the lower end of the ceiling frame hanging material 4, the hook-shaped second engaging claws 61f, 61f (Figs. 32 and 33) bent at a right angle to the horizontal direction at the lower end of the positioning bracket 6B engage at a right angle with the lower end of the mounting surface of the positioning bracket 6B of the ceiling frame hanging material 4 to determine the mounting position in the vertical direction, and the first engaging claws 61e, 61e on both sides of the upper end of the positioning bracket 6B engage (embrace) with both sides of the ceiling frame hanging material 4 to determine the mounting position in the horizontal direction, and the entire structure can be securely temporarily fixed (see the state in Figs. 32 and 33).

In other words, with this configuration, each of the top, bottom, left and right mounting positions can be accurately positioned, and then the mounting positions can be securely temporarily fixed, and then fixed with the drill screws 13, 13. As a result, the mounting position can be reliably maintained even if the worker does not support it with his or her hands, and even when the drill screws 13, 13 are screwed in, the mounting position can be accurately fixed without any misalignment.

As a result, not only is the workability when fixing the positioning bracket 6B to the ceiling frame hanging material 4 greatly improved, but it also becomes easier to adjust the attachment position of the fixing bracket 6A, which fits and fixes the ceiling frame 8, relative to the ceiling frame hanging material 4 via the positioning bracket 6B, improving the attachment accuracy of the ceiling frame 8 to the ceiling frame hanging material 4.

In this case, the second engagement claws 61f, 61f at the lower end of the positioning metal fitting 6B are bent into a U-shape, leaving a horizontal engagement surface of a predetermined width that takes into account the thickness of the joining part (connecting part) A (see Figure 39) of the ceiling frame hanging material 4, 4... made of square steel pipes with a crimped structure, so that even if the ceiling frame hanging material 4, 4... has a joining part (connecting part) A (see Figure 39) with the same crimped structure at one corner, it can be engaged in the state shown in Figure 32 without any problems. Also, because it is bent into a U-shape and the tips 61g, 61g function as engagement pieces, the engagement state is more reliable.

<Regarding the ceiling frame suspension structure according to the sixth embodiment of the present invention: FIG. 37>
37 shows a ceiling frame suspension structure according to embodiment 6 of the present invention. The ceiling frame suspension structure according to this embodiment is characterized in that the locking pieces 59, 59 portions provided on the open end side of the pair of opposing left and right walls 55, 55 of the second fitting portion 5B of the ceiling frame suspension structure according to embodiment 5 above, which prevent the ceiling frame suspension material 4 from moving toward the open opening side, are locking walls 59A of a cylindrical structure corresponding to a square steel pipe (or lip channel steel).

In this case, the locking wall 59A of the same cylindrical structure is cut off by dimensions a, a at the upper end and by dimensions b, b at the lower end (dimensions a, a and b, b are the same as in FIG. 29 of embodiment 5), and is configured so as not to interfere with the screwing of the drill screws (or tapping screws) 57, 57, 57, 57, just like in embodiment 5 described above.

Therefore, this configuration can achieve exactly the same effect as the fifth embodiment described above. In addition, it has the added benefit of further improving the strength of the second fitting portion 5B.

1 is a siding support, 2 is a siding, 3 is a horizontal reinforcement member on the ceiling base side, 4 is a ceiling frame suspension member, 5 is a ceiling frame suspension member mounting bracket, 5A is a first fitting portion, 5B is a second fitting portion, 6 is a connecting bracket, 7 is a joining bracket, 8 is a ceiling frame, 10 is an H-shaped steel, 20 is a horizontal reinforcement member suspension member, 51 is a vertical wall portion, 52 is a top wall portion, 53 is an engagement wall portion, 59 is a locking piece, 59A is a locking wall

Claims (3)

A ceiling frame suspension structure in which a horizontal reinforcement member on the ceiling base side that suspends a ceiling frame via a ceiling frame suspension member is made of structural steel or square steel pipes, and the ceiling frame suspension member is made of structural steel or square steel pipes, and an upper portion of the ceiling frame suspension member is attached vertically to the horizontal reinforcement member via a ceiling frame suspension member mounting bracket, while a lower portion of the ceiling frame suspension member is attached to the ceiling frame via a ceiling frame mounting means having a ceiling frame mounting position adjustment function,
The ceiling frame hanging material mounting bracket includes a first fitting portion having a hook structure that fits into the horizontal reinforcement from above to lock the ceiling frame hanging material mounting bracket to the horizontal reinforcement, and a pair of opposing walls that sandwich the ceiling frame hanging material are provided on both sides of a vertical wall portion that abuts against the side surface of the horizontal reinforcement of the first fitting portion, and a second fitting portion having a U-shaped cross section that slidably fits into the upper portion of the ceiling frame hanging material,
The second fitting portion is provided with a ceiling frame hanging material connecting means having a ceiling frame hanging material mounting position adjustment function for adjusting the mounting position of the ceiling frame hanging material between the second fitting portion and the ceiling frame hanging material to be fitted thereto;
A ceiling frame hanging structure characterized in that a locking portion is provided at the open ends of the pair of opposing walls of the second fitting portion to prevent the ceiling frame hanging material fitted into the fitting portion from moving outside the fitting portion, avoiding the screwing position where the vertical wall portion abutting against the side of the horizontal reinforcement of the first fitting portion is screwed into the side of the horizontal reinforcement. The ceiling frame hanging structure described in claim 1, characterized in that the ceiling frame hanging material connecting means equipped with a ceiling frame hanging material mounting position adjustment function comprises a loose hole of a predetermined length extending in the vertical direction provided in a pair of opposing walls that sandwich the ceiling frame hanging material of the second fitting portion of the ceiling frame hanging material mounting bracket, a bolt insertion hole provided in the ceiling frame hanging material, and a connecting bolt that connects and fixes the second fitting portion and the ceiling frame hanging material via the loose hole and the bolt insertion hole . A ceiling frame hanging structure as described in claim 1 or 2, characterized in that the hook-structured mounting bracket main body portion of the ceiling frame hanging material mounting bracket, which forms the first and second fitting portions, is provided with a reinforcing rib located in the middle of the width direction and extending in a band-like shape over the entire first and second fitting portions.

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