JP6722997B2 - Ceiling frame suspension structure - Google Patents

Description

The present invention relates to a ceiling frame suspension structure for suspending a ceiling frame from a structure of a building using a lightweight steel material, and more particularly to a structure of a mounting bracket for a lightweight steel material building structure in the ceiling frame suspension structure. It is a thing.

Generally, a ceiling frame that forms a part of a ceiling base structure is composed of, for example, a plurality of field rims and a plurality of field rims to which the field rims are attached, and these field rims and field rims are combined in a grid pattern. , The upper and lower parts of the same frame and the field frame receiver are joined and fixed to each other by a predetermined metal fitting to be integrally formed.

Then, using a hanging bolt of a predetermined length according to the height of the ceiling (the height of the foot), for example, the lower end of the hanging bolt at a predetermined portion of the field rim receiver, and the structure of the building such as the upper floor slab. The upper end of the suspension bolt is attached to a predetermined mounting portion of the structure via predetermined mounting metal fittings (sustaining metal fittings) so as to be hung on the ceiling installation portion of the structure of the building.

Further, the receiving ceiling joists and ceiling joists constituting the roof frame is a cross-sectional U-shaped groove section steel (channel member) and square shape tube is used, also the shaft-like rod member to the hanger bolts Further, the hanging bolt mounting bracket used is a locking bracket having a U-shaped cross section (lower side) and a box-shaped coupling bracket (upper side) (for example, the ceilings of Patent Documents 1 and 2). See the structure of the base structure).

JP, 2008-50784, A JP, 2013-68066, A

However, as shown in the above Patent Documents 1 and 2, the lower end portion of the suspension bolt having a rod structure is simply locked to the ceiling frame by using a locking bracket having a U-shaped cross section, while the suspension bolt having the rod structure is locked. In the case of a ceiling frame hanging structure in which the upper end is simply hung on a building structure such as a horizontal edge of H-shaped steel through a box-shaped coupling fitting, the bending rigidity and hanging strength of the hanging bolt itself, The connection strength between the structure and the suspension bolts, the connection strength between the suspension bolts and the field rim receiver (or field edge), etc. are low, and there is a drawback that the earthquake resistance when suspending the ceiling frame is lacking.

For example, the exciting force when an earthquake occurs includes vertical and vertical vibrations due to pitching, and horizontal vibrations due to rolling. In reality, these vibrations are a more complex combination. Therefore, in addition to the vertical load, a horizontal load is also applied to the hanging bolt and the hanging bolt mounting bracket, and it is required that the hanging bolt and the fitting for attaching the hanging bolt have sufficient seismic resistance against loads in both directions.

However, such requirements cannot be met only with the hanging bolt having the rod structure, the locking metal fitting having a U-shaped cross section, and the simple box-shaped coupling metal fitting.

The present invention has been made to solve such a problem, and by using a lightweight square steel material in place of the suspension bolt, effectively expands the cross-sectional area of the ceiling frame suspension member portion and also in the vertical direction. And the rigidity in the horizontal direction are improved, and a mounting member for attaching the hanging member made of the square steel to the horizontal edge of the H-shaped steel, which is a building structure, is provided with a fitting opening to the horizontal edge. The square frame-shaped mounting bracket is provided and is firmly connected to the rectangular box-shaped mounting bracket in a coaxial integral structure, so that the above-mentioned rectangular steel alone does not cause horizontal shaking, and thus the ceiling frame has a building structure. By suspending the ceiling frame, the basic suspension strength and seismic resistance of the ceiling frame can be improved, while the mounting strength of the square steel mounting bracket to the building structure can be further improved to further suspend the ceiling frame. It is an object of the present invention to provide a ceiling frame suspension structure with improved suspension strength and earthquake resistance.

The ceiling frame suspension structure of the present invention is configured to include the following problem solving means in order to solve the above problems.

(1) First Problem Solving Means First, in the ceiling frame suspension structure according to the first problem solving means of the present invention, a ceiling frame suspension member for suspending a ceiling frame from a structure of a building is made of a lightweight rectangular steel material. A structure for suspending a ceiling frame, which is formed by suspending a ceiling frame by attaching the upper end of the square steel material to the structure of the building through a square steel fitting. Has a rectangular steel mounting edge in the horizontal direction, and the square steel mounting bracket has a rectangular box-shaped mounting bracket main body in which the rectangular steel mounting bracket is connected and integrated with the upper end of the square steel, and the left and right sides of the mounting bracket main body. A fitting opening having a U-shaped cross-section that is opened toward both sides of the building structure in the horizontal direction for mounting a rectangular steel material, and the fitting opening is provided on the upper side or the lower side of the fitting opening. After fitting to the square steel material mounting edge of the building structure, it is screwed from the upper side to the lower side or from the lower side to the upper side, and the fitting main body is attached to the square steel material mounting edge of the building structure. The fastening bolts for fixing the mounting bracket and the bracket for connecting the square steel material integrally provided on the bottom of the mounting bracket body.The above-mentioned connection is made in a state where the bottom surface of the mounting bracket body is in contact with the upper end surface of the rectangular steel member. It is characterized in that the rectangular steel materials are connected and integrated in a coaxial structure by connecting them through a bracket.

In the case of such a structure, first, the ceiling frame suspending member portion that extends from the ceiling frame portion to the building structure portion and suspends the ceiling frame is connected to the coaxial integral structure with a square steel material and a rectangular box-shaped structure. It is formed by the square steel mounting bracket body. That is, the ceiling frame suspension member portion extending from the ceiling frame portion to the building structure portion becomes a structure having a square cross section (a single square member having a substantially predetermined cross-sectional area) as a whole, and the structure having this square cross section. Through the body the ceiling frame will be suspended from the horizontal edges of the building structure.

Moreover, the square steel material mounting bracket that is attached to the horizontal edge of the building structure is connected via the connecting bracket in the state where the upper end surface of the square steel material is in contact with the bottom surface of the mounting bracket body of the rectangular box structure. By connecting, the square steel materials are connected and integrated in a coaxial structure.

As a result, the ceiling frame suspension member part consisting of a structure with an equiangular cross section as a whole has significantly improved axial tensile and compressive strength as a vertical member compared to the case of a suspension bolt, and the cross-sectional area Is effectively expanded in both horizontal planes of XY, and as a result, bending strength and rigidity in the direction orthogonal to the axis are greatly increased.

Therefore, the seismic resistance of the ceiling frame suspension member portion against vertical pitching and rolling when an earthquake occurs is effectively improved.

Also, in the case of the same configuration, the square steel material connecting bracket for connecting the square steel materials is provided at the bottom of the mounting hardware body, so the mounting edge of the building structure on the opposite side of the square steel material mounting bracket is installed. Even when connecting with the auxiliary metal fitting attached to the portion via the connecting rod, the connecting portion does not interfere with the connecting rod.

(2) Second Problem Solving Means Next, in the ceiling frame suspension structure according to the second problem solving means of the present invention, in the structure of the first problem solving means of the present invention, the square steel material has a tubular section. It is characterized by being a square steel material with a structure.

Thus, rectangular steel hanging the ceiling frame, if made of rectangular steel section cylindrical structure, the cross-sectional area of the closed cross section of the cylindrical wall to thus suspending members extending in the XY directions is effectively enlarged in the XY directions , The rectangular end faces of the closed cross-section structure are aligned with the bottom surface of the rectangular steel mounting bracket body, and are connected and integrated with the coaxial structure by the connecting bracket. stiffness Jikujika exchange direction after attaching the attaching edge portion of the horizontal building structure through the body is greatly improved.

(3) Third Problem Solving Means Next, in the ceiling frame suspension structure according to the third problem solving means of the present invention, in the configuration of the first problem solving means of the present invention, the square steel material has a C-shaped cross section. It is characterized by being a lip channel steel with a channel structure.

As described above, when the rectangular steel material for suspending the ceiling frame is made of a lip channel steel material having a channel structure with a C-shaped cross section, the suspension member has a cross-sectional area of XY due to the three pieces extending in both XY directions and the opening-side lip portion. It is effectively expanded in both directions, and the three pieces and the edges are joined together on the bottom surface of the rectangular steel mounting bracket main body, so that they are integrally connected to the coaxial structure by the connecting bracket, so that the rectangular steel mounting bracket main body is integrated, The rigidity in the direction perpendicular to the axis after being attached to the horizontal mounting edge of the building structure through the rectangular steel fitting main body is effectively improved.

(4) Fourth Problem Solving Means Next, in the ceiling frame suspension structure according to the fourth problem solving means of the invention of the present application, in the configuration of the first problem solving means of the invention of the present application, the square steel material has a U-shaped cross section. It is characterized by being a channel steel with a channel structure.

As described above, when the square steel material for suspending the ceiling frame is made of the channel steel having a channel structure with a U-shaped cross section, the cross-sectional area of the suspension member is effectively expanded in both XY directions by the three pieces extending in both XY directions. Since the three pieces are attached to the bottom surface of the rectangular steel mounting bracket body and are connected and integrated in a coaxial structure by the connecting bracket, the rectangular steel mounting bracket body is integrated, and the building structure through the same rectangular steel mounting bracket body. The rigidity in the direction orthogonal to the axis after being mounted on the horizontal mounting edge of is effectively improved.

(5) Fifth Problem Solving Means Next, the ceiling frame suspension structure in the fifth problem solving means of the present invention has the same structure as the first problem solving means of the present invention, in which the square steel material has a cross-sectional angle structure. It is characterized by being equilateral angle steel.

In this way, when the square steel material for suspending the ceiling frame is made of equilateral angle steel material having an angled cross-section structure, the cross-sectional area of the suspension member is effectively expanded in both XY directions by the two pieces extending in both XY directions, and these two pieces are Since the bottom surface of the rectangular steel mounting bracket body is joined and integrated into a coaxial structure by the connecting bracket, the rectangular steel mounting bracket body is integrated, and the horizontal direction of the building structure is integrated through the same rectangular steel mounting bracket body. The rigidity in the direction orthogonal to the axis after being attached to the attachment edge of is effectively improved.

(6) Sixth Problem Solving Means Next, in the ceiling frame suspension structure according to the sixth problem solving means of the present invention, in the structure of the first problem solving means of the above invention of the present application, the connecting bracket has a bolt insertion hole. It is characterized by comprising a connecting bracket having a hinge structure.

In this way, when the connecting bracket is formed of a hinge-structured connecting bracket having a bolt insertion port, the number, shape, and mounting position of the hinge brackets can be appropriately arranged according to the above-described rectangular steel materials of various shapes. As a result, the square steel materials can be connected, and the connection strength and supporting rigidity can be more effectively increased.

As a result, according to the present invention, the ceiling frame suspension strength of the entire ceiling frame suspension member portion, the connection strength between the suspension member and the suspension member mounting bracket, and the mounting strength of the suspension member mounting bracket to the building structure. Both of them are greatly improved.

As a result, the seismic resistance of the entire ceiling base material is greatly improved, and it is possible to provide a ceiling frame suspension structure having higher seismic resistance.

FIG. 1 is a perspective view of a building structure (H-shaped steel) showing a ceiling frame suspension structure according to a first embodiment of the present invention, a mounting bracket, a suspension member (square cylinder made of lightweight steel), and an auxiliary bracket part. .. It is a side view of a building structure (H-shaped steel) showing the same ceiling frame suspension structure, a mounting fixture, a suspending member (square cylinder made of lightweight steel), and an auxiliary fixture part.

FIG. 3 is a front view of a building structure (H-shaped steel), a mounting bracket, and a suspension member (square cylinder made of lightweight steel) showing the same ceiling frame suspension structure . It is the perspective view seen from the diagonally right upper side which shows the structure of the suspending member (square cylinder which consists of lightweight steel materials) attachment metal fittings in the same ceiling frame suspension structure. It is the perspective view seen from the lower right of the right which shows the structure of the suspending member (square tube which consists of lightweight steel materials) attachment metal fittings in the same ceiling frame suspension structure. FIG. 6 is a central cross-sectional view showing the structure of a hanging member (square tube made of lightweight steel) attachment fitting in the same ceiling frame hanging structure. FIG. 6 is a partially cutaway perspective view showing a structure of a suspension member (a rectangular cylinder made of a light-weight steel material) in the ceiling frame suspension structure as seen from diagonally above and right. It is the perspective view seen from the diagonally right upper direction which shows the structure of the modification of the suspension member (square cylinder which consists of lightweight steel materials) attachment metal fittings in the ceiling frame suspension structure of the 1st Embodiment. It is a side view which shows the structure of the modified example which changed a part of hanging member (square tube which consists of lightweight steel materials) attachment metal fittings in the ceiling frame hanging structure of the 1st Embodiment. FIG. 7 is a central cross-sectional view showing a structure of a modified example of a hanging member (square cylinder made of lightweight steel) mounting fitting in the ceiling frame hanging structure of the first embodiment. Structure of a holding plate portion of a horizontal edge of a building structure (H-shaped steel) in a structure of a modified example of a hanging member (square tube made of lightweight steel) mounting metal fitting in the ceiling frame hanging structure of the first embodiment It is an enlarged side view showing. FIG. 3 is a perspective view showing a configuration of the ceiling frame suspension structure according to the first embodiment of the present invention in which a suspension member mounting bracket is used for mounting an oblique reinforcing member (brace material). In case of employing the configuration of FIG. 12, connecting fitting when using oblique reinforcing member (brace) to be suspended square shape tube made of the same lightweight steel and members, for coupling by providing a connecting fitting to the upper end It is a perspective view which shows the structure of a part seen from diagonally right above. FIG. 13 is a perspective view showing a configuration in which a part of the connecting metal fitting is modified when the hanging member mounting metal fitting is used for mounting the diagonal reinforcing member (brace material) as in FIG. 12. FIG. 15 is a perspective view showing a configuration of a connecting fitting portion when the configuration of FIG. 14 is adopted, as viewed from diagonally right above. A perspective view of a building structure (H-shaped steel) showing a ceiling frame suspension structure according to a second embodiment of the present invention, a mounting fixture, a suspension member (lip channel steel made of lightweight steel), and an auxiliary fixture part. Is. It is a side view of a building structure (H-section steel) showing the same ceiling frame suspension structure, a mounting fixture, a suspension member (lip channel steel made of lightweight steel), and an auxiliary fixture part. It is the perspective view seen from the lower right of the right which shows the composition of the hanging member attachment metal fitting part used in the ceiling frame hanging structure. A building structure (H-section steel) showing a ceiling frame suspension structure according to a third embodiment of the present invention, a mounting fixture, a suspension member (channel steel made of lightweight steel), and an obliquely lower right portion of an auxiliary fixture part. It is the perspective view seen from. It is a side view of a building structure (H-section steel) showing the same ceiling frame suspension structure, a mounting fixture, a suspension member (channel steel made of lightweight steel), and an auxiliary fixture part. A building structure (H-section steel) showing a ceiling frame suspension structure according to a fourth embodiment of the present invention, a mounting fixture, a suspension member (equal angle steel made of lightweight steel), and an obliquely lower right portion of an auxiliary fixture part. It is the perspective view seen from. It is a side view of a building structure (H-shaped steel) showing the same ceiling frame suspension structure, a mounting fixture, a suspension member (equal angle steel made of lightweight steel), and an auxiliary fixture part.

Hereinafter, some specific embodiments for implementing the ceiling frame suspension structure according to the present invention will be described in detail with reference to the accompanying drawings. In any of the configurations according to the embodiments of the invention of the present application, in any case, for example, an H-shaped steel having a horizontal mounting edge is adopted as a structure of a building in which the ceiling frame is suspended. It is constructed as suitable for mounting against horizontal mounting edges of H-section steel.

<First Embodiment>
First, attached FIGS. 1 to 15 show a ceiling frame suspension structure according to a first embodiment of the present invention, in which the structure of an H-section steel as a building structure, the H-section steel Of a ceiling frame suspending member for suspending a ceiling frame on a horizontal mounting edge of the above, a configuration of a suspending member mounting bracket for attaching an upper end of the ceiling frame suspending member to the mounting edge of the H-section steel, the ceiling frame And the configuration of the bracing material and the coupling metal fitting which are diagonally reinforcing materials for diagonally coupling the H-shaped steel portion and the hanging member mounting metal fitting, and the configurations of their modifications.

Hereinafter, the configuration and operation of each of these parts will be described in detail with reference to the corresponding drawings.

(1) Constitution of Ceiling Base Material Although the ceiling base material in the embodiment of the present invention is not particularly shown, for example, a plurality of field rims and a field rim receiver that attaches the plurality of field rims in a grid pattern are used. And a plurality of suspension members for suspending the ceiling frame on the horizontal mounting edge of the H-shaped steel, which is a building structure provided on the lower floor of the upper floor of the building, for example. It is composed of a plurality of diagonal reinforcing materials such as braces that connect the suspension members in an oblique direction.

The configuration of such a ceiling frame portion is the same as the configuration of FIGS. 1 and 2 of Japanese Patent Application No. 2015-120940, which is an application of the applicant of the present application, for example.

Also in the case of this embodiment, the field edge and the field edge receiver are each made of a metal rectangular tube member having a vertically long cross-section rectangle, and a field edge made of the metal rectangular tube members having a rectangular cross section. A field rim receiver is, for example, a washer having a U-shaped cross section (upper side and lower side) provided at intersections (overlapping portions) other than a connecting portion with a lower end of a hanging member described later, and between them. By connecting and pulling up and down with connecting bolts, it is firmly fixed.

It is of course possible to adopt conventional channel-type steel materials for these field edges and field edge receivers, depending on the required application and strength.

On the other hand, the lower end side of the suspension member for suspending the ceiling frame is attached to the intersection portion at a predetermined position among the intersections of the field edge and the field edge receiver via a ceiling frame attachment fitting. It is designed to be used.

The ceiling frame is hung by the plurality of suspending members and the plurality of diagonal reinforcing members (braces) on the horizontal mounting edge of the H-shaped steel that is the structure of the building.

In this way, after the suspension construction for the horizontal mounting edge of the H-section steel of the ceiling frame is completed, for example, a ceiling finishing board or the like necessary for the lower surface side of the field edge is provided. It is mounted (for the mounting structure of a board for ceiling finishing, see, for example, JP-A-2013-68066).

(2) Regarding the structure of the H-section steel (see FIGS. 1 to 3)
The building structure in this embodiment is made of H-shaped steel as described above. As shown in FIGS. 1 to 3, the H-section steel 10 is arranged in a structure in which H is laid sideways, and the central portions of the horizontal edges 10a and 10b at the upper and lower ends are connected in an I-shape. It has a high-strength structure connected by parts.

The horizontal edges 10a and 10b extending uniformly in both the left and right directions on the upper and lower end sides respectively function as attachment edges for suspending the ceiling frame, but in the case of this embodiment, the lower horizontal edges 10a is chosen as the mounting edge. Therefore, hereinafter, the horizontal edge portion 10a on the lower side will be referred to as a mounting edge portion 10a.

(3) Constitution of the ceiling frame suspension member portion (see FIGS. 1 to 3 and 7)
Next, the plurality of ceiling frame suspension members are indicated by reference numerals 2, 2... In FIGS. 1 to 3 and 7. The ceiling frame suspension members 2, 2,... Are vertical members for suspending the ceiling frame that extend in the vertical direction, as shown in FIGS. 1 to 3, for example. Although the same as the suspension bolt having the shaft diameter of, the suspension members 2, 2,... In this embodiment are light-weight square steel materials, more specifically, a rectangular cross section (such as shown in FIG. 7). It is formed by a rectangular tubular body (lightweight rectangular steel tube) made of lightweight steel material (rectangular or square), and the tubular wall portion of the tubular body is formed to have necessary and sufficient strength and thickness as a whole.

Various structures can be considered as the rectangular tubular body having a rectangular cross section, but in the case of this embodiment, for example, as shown in detail in FIG. 7, a metal plate is bent into a rectangular cross section (for example, Roll forming), and the side edges 2a and 2b are connected to each other at the side A of the corner so as to tie each other in an S-shape, and the bending ribs 2c are provided inside the adjacent side edges on one side. The part is crimped and integrated into a rectangular cylinder having a closed cross-section with high compression strength.

The ceiling frame suspension member 2 is provided below the ceiling frame suspension member mounting bracket 61 whose upper end side is fitted and fixed to the mounting edge portion 10a of the H- shaped steel 10, as described below. Since the pair of left and right connecting brackets 50a and 50b are connected via the bolt 51, bolt holes 2d and 2d for inserting the bolt 51 are provided at the upper end portion.

(4) Regarding the structure of the ceiling frame suspension member mounting bracket (see FIGS. 1 to 6, especially FIGS. 4 to 6)
As described above, in this embodiment, the structure on the side of the building to which the ceiling frame is attached is made of H-shaped steels 10, 10..., And the horizontal mounting edges of the H-shaped steels 10, 10. The ceiling frame suspension member 2 for suspending the ceiling frame with respect to 10a, 10a,... Is composed of a metal rectangular cylinder having a closed cross section structure, has a larger cross-sectional area than the conventional suspension bolt, and The feature is that the vertical member has high compressive load strength and high bending rigidity.

Therefore, in response to this, the ceiling frame suspension member mounting bracket 61 for mounting the upper end side of the suspension member 2 to the horizontal mounting edge portion 10a of the H-shaped steel 10 on the building side is also made of the metal square. The ceiling frame suspension member 2 made of a tubular body is connected and integrated in a tubular shape having a rectangular cross section to have high compressive strength and bending rigidity, for example, as follows.

That is, the ceiling frame suspension member mounting bracket 61 is configured by a metal rectangular tube body having a rectangular cross section and having the predetermined outer diameter, as shown in FIGS. 1 to 3 and 4 to 6, for example. A bottom wall surface (fastening seat portion) 610 which is butted in a stable contact state corresponding to the cross-sectional area and cross-sectional shape of the upper end of the ceiling frame suspension member 2 and is integrally connected to the rectangular structure in the vertical direction (axial direction). The mounting box body 61a having a rectangular box shape (a rectangular parallelepiped shape with only the front side opened) and the front side of the mounting box body 61a having the rectangular box shape (the mounting edge portion 10a side of the H-shaped steel 10 side) are opened. The fitting openings 61b, 61b having a U-shaped cross section with a predetermined depth in the front-rear direction, and the fitting openings 61b, 61b having the U-shaped cross-section are located on the upper wall surface 611 side of the central portion in the front-rear direction and penetrate downward from above. When the H-shaped steel 10 is attached to the attachment edge portion 10a of the fastening bolt screwing hole 61i provided by the above, the fastening bolt screwing hole 61i is inserted and screwed from the upper side to the lower side, It is composed of a fastening box 61c for fixing the rectangular box-shaped mounting metal body 61a to the mounting edge portion 10a of the H-shaped steel 10. Further, an insertion hole 61e for the connecting rod 70 described later is provided on the back side.

The fastening bolt 61c is adapted to be screwed into the fastening bolt screwing hole 61i via, for example, a spring washer 61j and a locking nut 61h, so that the fastening bolt 61c is not loosened when the bolt is fastened. Has been done.

Further, the fitting openings 61b, 61b having a U-shaped cross section are formed by cutting out both side walls 612, 612 on the left and right of the front side opening of the fitting main body 61a to the rear side by a predetermined depth (temporarily). In the figure, two sets of left and right reference numerals 61b and 61b are shown as corresponding to the left and right side walls 612 and 612 which are cut out in a U-shaped cross section).

In the case of this embodiment, the fitting ports 61b, 61b to the H-shaped steel mounting edge portion 10a are provided at least in the front half portion in the front-rear direction when viewed from the side surface of the mounting fitting body 61a, The substantially entire portion of the bottom surface 610 is in contact with the upper end surface of the ceiling frame suspension member 2 formed of the above-mentioned rectangular cylinder, and in the contact state, the ceiling frame is suspended by the bolts 51 via the connecting brackets 50a and 50b. The member mounting bracket 61 and the ceiling frame suspension member 2 are firmly connected and integrated.

As a result, the ceiling frame suspension member mounting bracket 61 and the ceiling frame suspension member 2 become a rigid body of substantially one rectangular tube structure, and the ceiling frame suspension member mounting bracket 61 is attached to the H- shaped steel mounting edge portion 10a. Combined with the firmly attached state of, the ceiling frame can be hung very strongly and in a state where it is strong against the horizontal vibration force.

The connecting brackets 50a and 50b to which the ceiling frame suspending member 2 is coupled as described above are located on both left and right sides of the bottom surface portion of the box-shaped ceiling frame suspending member mounting bracket 61, and extend downward by a predetermined length. The distal end portion is formed of a hinge bracket structure having a substantially semi-circular shape (or may be a rectangular shape), and the bolt insertion holes 52, 52 are located at the distal end side semi-circular central axis portion. Has been formed.

(5) Configuration of Partially Modified Example of Ceiling Frame Hanging Member Mounting Bracket In the ceiling frame suspending member mounting bracket 61 having the above-described configuration, the fastening bolts 61c with the upper surface of the H-shaped steel mounting edge portion 10a in the fitting portion are used. The fastening is pressed only by the tip portion 61d of the bolt shaft 61k of the fastening bolt 61c so that the fastening force is applied.

Therefore, although the H- shaped steel mounting edge portion 10a is supported on the lower surface side by a wide area between the opening side walls 612 and 612 of the mounting metal body 61a, the upper surface side is pressed only in a state close to point contact. This means that the fixing force on the upper surface side is lacking when a horizontal exciting force is applied, and the fastening fixing force as a whole is also low.

Therefore, as one modification (improvement) for solving such a problem, for example, as shown in FIGS. 8 to 10, a pressing plate 61f having a predetermined area is provided at the lower end of the bolt shaft 61k of the fastening bolt 61c. A configuration is also adopted in which the pressing area on the upper surface side is enlarged.

The pressing plate 61d at the lower end of the bolt shaft 61k of the fastening bolt 61c is formed, for example, in the shape of a disc (although it may be a square plate, of course), and its diameter is set to the left and right side walls 612 of the fitting main body 61a. By forming the size across the width between 612, a sufficiently large pressing area corresponding to the left and right side walls 612 and 612 of the fitting openings 61b and 61b is formed.

Further, in addition to this, as shown in detail in FIGS. 10 and 11, the thickness a of the pressing plate 61d is set to a sufficiently large plate thickness (for example, 12 mm), and a sufficient depth b is provided for it. A bolt screwing groove 61m (for example, 11 mm) is formed, and the tip 61d of the bolt shaft 61k of the fastening bolt 61c is screwed into the bolt screwing groove 61m by a sufficient length b so as to be perpendicular to the shaft. The two are securely engaged with each other so as not to tilt.

In addition, the hole diameter of the predetermined length c portion 61n (for example, 1 mm) downward from the tip (lower end) of the bolt screw groove 61m is smaller than the hole diameter of the bolt screw groove 61m by a predetermined dimension. The bolt shaft 61k of the screwed fastening bolt 61c is securely and firmly locked and fixed to the pressing plate 61f at an appropriate screwing depth position.

Then, by the combination of these configurations, a strong clamping force for clamping the mounting edge portion 10a of the H-section steel 10 on the upper and lower surface sides with the pressing plate 61f on the lower end side of the bolt shaft 61k of the fastening bolt 61c is sure. It will be secured and realized.

In that case, if necessary, a reinforcing plate for connecting the left and right side walls 612 and 612 cut out in the U-shaped cross section is provided to deform the left and right side walls 612 and 612 cut out in the U-shaped cross section. ) Is prevented, thereby increasing the fastening force to the upper and lower surfaces of the H-shaped steel mounting edge portion 10a at the time of fastening, and a more reliable and firm fastening state is realized.

(6) Constitution of Auxiliary Metal Fitting Corresponding to Ceiling Frame Hanging Member Mounting Metal Fitting In the present embodiment, the ceiling frame hanging member mounting metal fitting 61 is further sandwiched with the I- shaped portion of the H- shaped steel 10. An auxiliary metal fitting 64 having a structure similar to that of the ceiling frame suspension member mounting metal fitting 61 is provided on the mounting edge portion 10a on the opposite side.

That is, as shown in FIGS. 1 to 3, the auxiliary metal fitting 64 also includes a rectangular box-shaped (rectangular parallelepiped-shaped auxiliary metal body 64a having an opening on the front side) and a rectangular box-shaped auxiliary metal body 64a. Fitting ports 64b, 64b having a U-shaped cross section and having a predetermined depth in the front-rear direction, which are opened on the front surface side (the mounting edge 10a side of the H-shaped steel 10), and front and rear of the fitting ports 64b, 64b having the U-shaped cross section. It is provided on the upper wall surface of the central portion in the direction from the upper side to the lower side, and is inserted and screwed from the upper side to the lower side at the time of mounting, and the rectangular box-shaped auxiliary metal fitting body 64a is attached to the H-shaped steel 10 are composed of a fastening bolt 64c fixed relative to the opposite side of the attaching edge portion 10a, the cross-sectional U-shaped fitting opening 64b, 64b is a front-side opening left and right side walls of the auxiliary metal fitting body 64a It is formed by notching a predetermined depth on the rear side.

Then, the ceiling frame suspension member attachment fitting 61 and the auxiliary fitting 64 have their fitting ports 61b, 61b and 64b, 64b opposed to each other in the same horizontal plane direction, as shown in FIGS. 1 to 3, for example. In this state, the left and right connecting rods 70, 70 (heads 70a, 70a, tips 70b, 70b, nuts 70c, 70c) are strongly pulled and connected to each other.

As a result, the ceiling frame suspension member mounting bracket 61 is more securely and firmly fixed to the mounting edge portion 10a of the H-shaped steel 10.

That is, according to such a configuration, in the connected and fixed state shown in FIGS. 1 to 13, the attachment fitting 61 of the ceiling frame suspension member 2 for suspending the ceiling frame is reliably moved in the fitting direction by the auxiliary fitting 64. Even if an external force in the non-fitting direction acts on the mounting bracket 61 of the ceiling frame suspension member 2, it will not come off, and the H-shaped steel mounting edge portions 10a, 10a will be removed. Since the two parts on both ends are fitted and fixed in opposite directions, the fitted state itself becomes stronger.

For example, in the case of the same configuration, as is apparent from the configuration shown in FIG. 2, if a force in the horizontal arrow A1 direction acts on the ceiling frame suspension member 2, the ceiling frame suspension member mounting bracket 61 Through the fitting portion, a pressing force in the direction of arrow A2 acts on the mounting edge portion 10a of the H-shaped steel 10 and a tensile force in the direction of arrow A3 acts on the connecting rods 70 and 70.

However, the mounting edge 10a of the H-section steel 10 does not move because of its high supporting rigidity, and a large tensile force A3 acts on the connecting rods 70, 70. Therefore, if the auxiliary metal fitting 64 is not provided and the connecting rods 70 and 70 are not provided, the fitting condition of the fitting portion of the ceiling frame suspension member mounting fitting 61 is deteriorated, and the fitting condition is removed depending on the case. Can also be considered.

However, as described above, the two sets of the ceiling frame suspension member mounting bracket 61 and the auxiliary bracket 64 are used to fit and fix in two opposite directions, and the left and right sides are placed with a predetermined width to secure them. When the two connecting rods 70, 70 are connected in the opposite direction, the auxiliary metal fitting 64 and the connecting rods 70, 70 reliably prevent the fitting portion from being deformed by the large tensile force A3, so that a more reliable fitting is achieved. You will be able to maintain your condition. As a result, the movement of the ceiling frame suspension member 2 in the A1 direction is also suppressed.

On the other hand, on the contrary, if a horizontal force in the direction of the arrow B1 is applied to the ceiling frame suspending member 2, the H-shape is transferred via the fitting portion of the ceiling frame suspending member mounting bracket 61. A tensile force in the direction of arrow B2 acts on the mounting edge portion 10a of the steel 10, and a pressing force in the direction of arrow B3 acts on the connecting rods 70 and 70.

However, the mounting edge 10a of the H-shaped steel 10 does not move because of its high supporting rigidity, and a large pressing force B3 acts on the connecting rods 70, 70. Therefore, if the auxiliary metal fitting 64 and the connecting rods 70, 70 are not provided, the fitting condition of the fitting portion of the ceiling frame suspension member mounting metal fitting 61 is deteriorated, and the fitting condition is removed depending on the case. Can also be considered.

However, as described above, two sets of fittings, namely, the ceiling frame suspension member mounting bracket 61 and the auxiliary bracket 64 are used to fit and fix at two places, and moreover, a predetermined width is placed on the left and right to connect them. When connected by the connecting rods 70, 70, the large pressing force B3 is blocked by the connecting rods 70, 70 and the auxiliary metal fitting 64, so that the fitting portion is prevented from being deformed by the pressing force B3, and the connecting force is surely secured. The fitted state can be maintained.

As a result, the movement of the ceiling frame suspension member 2 in the B1 direction is also suppressed. As a result, the plurality of ceiling frame suspension members 2, 2... Are less likely to roll, and the earthquake resistance is improved.

As described above, two sets of fittings of the ceiling frame suspension member mounting bracket 61 and the auxiliary bracket 64 are used to fit and fix in two opposite directions at a predetermined width on both sides. When the two are connected in the opposite direction using the two connecting rods 70, 70, the auxiliary metal fitting 64 and the connecting rods 70, 70 reliably prevent the fitting portion from being deformed by a large tensile force, so that a more reliable fitting state can be obtained. In this case, two connecting rods 70, 70 do not always need to be provided, and a structure in which one connecting rod 70 is provided at the center of each other is sufficient. The effect can be realized.

(7) Concerning connection structure of diagonal reinforcing members using ceiling frame suspension member mounting bracket The ceiling frame suspension member mounting bracket 61 configured as described above has a pair of left and right connecting brackets on the lower side of the mounting bracket main body 61a. 50a, by using 50b, for example, as shown in FIG. 12, it is also possible to connect the diagonal reinforcement (brace) 4 between the lower side roof frame (square shape tube to form a field edge receiving) is there.

In the case of this embodiment, the diagonal reinforcing member 4 also employs a metal rectangular tube (having the configuration shown in FIG. 7) made of a lightweight steel material having a rectangular cross section similar to the ceiling frame suspension member 2. At the upper end, for example, attached connecting fitting 73 of the shaped-shaped cross-section U shown in FIG. 13, the connecting bracket 50a of the lower member 61 suspended above the ceiling frame through the connecting fitting 73, 50b on both sides of the (outer ), and is connected via a bolt 51.

As is apparent from FIG. 13, for example, this connecting fitting 73 is screwed to the left and right side wall portions of the connecting fitting main body 73b having a U-shaped cross section, to the left and right side wall surfaces of the diagonal reinforcing member 4 made of the rectangular tube. , Which are provided with the drill screw insertion holes 74a, 74a,..., And the concave groove portion inside thereof is fitted to the upper wall surface and the left and right side wall surface portions of the diagonal reinforcing member 4 and fastened and fixed as shown in FIG. And integrate.

Then, the hinge brackets (connecting pieces) 73a, 73a having the bolt insertion holes 73e, 73e, which are elongatedly provided on the distal ends of the left and right side wall portions in which the drill screw insertion holes 74a, 74a... It is fitted on the outer side of the pair of left and right connecting brackets 50a, 50b at the bottom of the ceiling frame suspension member mounting bracket 61 having the bolt insertion holes 52, 52, and the mutual bolt insertion holes 73e, 73e and 52, 52 are coaxially positioned. The bolts 51 are inserted together, and the other end is tightened with a nut 52 to connect them as shown in FIG. As a result, the diagonal reinforcing member 4 can be easily and surely connected and installed.

As a matter of course, the mounting bracket 61 for mounting the diagonal reinforcing member is prepared separately from the mounting brackets 61, 61,... In the ceiling frame suspending section, and interferes with the mounting brackets 61, 61,. It is installed using the position that does not.

Thus, between the roof frame side field edge receiving the (not shown) and the building structure side H-beams 10, via the mounting bracket 61 for diagonal reinforcement mounting, high angular form cylinder of a compression load in the vertical diagonal direction When disposing become more oblique stiffener (brace) 4,4 ..., O receives roof frame hanging members 2 ... and field edge likewise made of square shape tube also made of high angular form cylinder compressive load A stronger stiffening structure forming a right triangle between will be realized.

Therefore, the strength of the ceiling frame as the grape rack and the hanging strength of the ceiling frame are further improved, and the seismic resistance against the horizontal vibration force at the time of an earthquake is greatly improved.

Even when it is used as the diagonal reinforcing material mounting bracket 61 as described above, a structure in which the auxiliary bracket 64 described above is combined and fixed to both the left and right mounting edge portions 10a and 10a of the H- shaped steel 10 is adopted if necessary. To be done.

(8) Constituent Materials of Ceiling Frame Hanging Member Mounting Bracket and Oblique Reinforcing Material Mounting Bracket In the case of this embodiment, the ceiling frame hanging member mounting bracket 61 and the diagonal reinforcing member mounting bracket 61 having the above-described configurations are respectively As an example, it is configured by integrally molding, for example, cast steel or ductile cast iron.

As in the former case, if the ceiling frame suspension member mounting bracket 61 and the diagonal reinforcing member mounting bracket 61 have an integrally molded structure made of cast steel, the mounting brackets 61, 61 can be manufactured easily and at low cost. become able to. Further, since the cast steel itself has a high strength, when the respective mounting fittings 61, 61 are integrally molded using the same casting steel, the respective mounting fittings 61, 61 have a rectangular box-shaped mounting fitting body 61a as described above. Even if there is a hollow inside and there are fitting holes 61b and 61b for fitting into the mounting edge portion 10a of the H-shaped steel 10, insertion holes of fastening bolts 61c, connection brackets 50a and 50b, etc. Insufficient strength as in the case of forming by sheet metal processing and welding, and reinforcement by a reinforcing member for solving it is not necessary (as the application of the applicant, See the configuration of FIG. 9 of Japanese Patent Application No. 2014-71636). In addition, variations in welding strength and increase in manufacturing cost unlike in the case of iron plate welding do not occur.

In this case, since the corresponding auxiliary metal fitting 64 has the same structure, the one integrally molded of cast steel is also used.

As the cast steel material in this case, SC450 is suitable among the carbon steel cast steel products SC360, SC410, SC450, and SC480 of JIS-G5101, for example. In the case of this cast steel material SC450, the tensile strength is 450 N/mm ² , the elongation is 19%, and it has both strength and toughness. Therefore, it is not brittle like general cast iron and can sufficiently withstand impact loads such as seismic loads, and is provided with the fitting ports 61b and 61b and the connecting brackets 50a and 50b as described above. In the case of the above, it is possible to maintain a sufficiently effective strength.

In addition to the cast steel, for example, ductile cast iron (FCD450) can be adopted. Even in that case, the same performance as that of the cast steel can be obtained.

(9) Modification of Partial Configuration of Oblique Reinforcement Coupling Metal Fitting In the above configuration of the diagonal reinforcement material connecting metal fitting 73, as is clear from the configuration of FIG. 12, for example, the drill screw insertion hole 74a of the connecting metal fitting main body 73b. , 74a... There are no bearings for fastening bolts between the hinge brackets (connecting pieces) 73a, 73a having bolt insertion holes 73e, 73e that are provided on the front end sides of the left and right side wall portions, and the ceiling frame. The connecting brackets 50a and 50b on the hanging member mounting bracket 61 side support the fastening force at the time of bolt fastening. Therefore, there is a problem that the bearing capacity is not always sufficient.

Therefore, as a configuration for solving such a problem, for example, as shown in FIG. 14 and FIG. 15, there are bolt insertion holes 73e, 73e which are elongatedly provided at the distal ends of the left and right side wall portions of the coupling fitting body 73b. A reinforcing pipe part 75 for supporting the fastening force at the time of bolting is provided between the hinge brackets (connecting pieces) 73a, 73a, and the hinge brackets 73a, 73a integrally provided by connecting the pipe parts 75 are provided on the ceiling. It is also possible to adopt a configuration in which it is fitted inside the connecting brackets 50a and 50b on the frame suspension member attachment fitting 61 side to support the fastening force when fastening the bolt 51.

In this way, if the bolts 51 and the nuts 52 are used to fasten the connection brackets 50a and 50b on the ceiling frame suspension member mounting bracket 61 side, it is possible to fasten them with a sufficiently large fastening force, and the diagonal reinforcing member 4 is provided. And the diagonal reinforcing material mounting bracket (ceiling frame suspension member mounting bracket) 61, and thus the diagonal reinforcing material 4 and the H- shaped steel 10 are strengthened. In addition, it is possible to prevent the ceiling frame suspension member mounting bracket 61 from being deformed inwardly of the connecting brackets 50a and 50b.

<About the second embodiment>
In the ceiling frame suspension structure according to the first embodiment described above, as the ceiling frame suspension member 2 made of a square steel material, a square tube having a rectangular cross section made of lightweight steel material (FIG. 7) is adopted, and its upper end portion is The pair of left and right connecting brackets 50a and 50b under the ceiling frame suspension member mounting bracket 61 are fitted inside and connected by bolts 51.

However, the rectangular steel material forming the ceiling frame suspension member 2 is not limited to such a rectangular tube having a rectangular cross section, but is made of a lip channel steel material having a C-shaped cross section as shown in FIGS. 16 and 17, for example. It can also be made of square steel.

Also in the case of such a lip channel steel material having a C-shaped cross section, since a pair of lip portions (flange portions) 2f, 2f having a predetermined width are provided on the opposite side surface of the main body wall side web portion 2e via the side wall portion, Although it does not have a closed cross-section like the above rectangular cylinder, it has a sufficient compressive load close to it, an effective ceiling frame strength improving effect, an effective ceiling frame hanging strength improving effect, and horizontal vibration in the event of an earthquake. It is possible to realize an effective seismic resistance improving action against a force (see arrows A1 to A3 and B1 to B3 similar to FIG. 2 shown in FIG. 17).

In this case, a bolt insertion hole may be formed at the upper end of the wide web portion 2e, which is the single wall, and the bolt 51 may be inserted therethrough. Therefore, the connecting bracket 50 on the ceiling frame suspension member mounting bracket 61 side may be inserted. For example, as shown in FIG. 18, it suffices to provide one piece at the center of the bottom portion of the fitting main body 61a and form the bolt insertion hole 52, so that the configuration and the attachment are simplified.

However, since the bottom surface of the fitting main body 61a and the upper end surface of the ceiling frame suspension member 2 are butted against each other with a wide contact area having a C-shaped cross section, the degree of integration after connection is high. It is high, and bending deformation in the direction orthogonal to the axis of the connecting portion is less likely to occur.

<About the third embodiment>
In the ceiling frame suspension structure according to the first embodiment described above, as the ceiling frame suspension member 2 made of a square steel material, a square tube having a rectangular cross section made of lightweight steel material (FIG. 7) is adopted, and its upper end portion is The pair of left and right connecting brackets 50a and 50b below the mounting bracket 61 are fitted inside and connected by the bolts 51.

However, the rectangular steel material forming the ceiling frame suspension member 2 is not limited to such a rectangular tube having a rectangular cross section, and is, for example, a channel-shaped channel member having a U-shaped cross section as shown in FIGS. 19 and 20. It can also be made of steel.

Even in the case of the channel-shaped steel material which is the channel member having the U-shaped cross section as described above, since it has the main body wall side web portion 2e and the side wall portions on both sides thereof which are orthogonal to each other in an angle shape (in the XY direction), However, it has a sufficient anti-compression load and realizes an effective ceiling frame strength improvement effect, an effective ceiling frame suspension strength improvement effect, and an effective seismic resistance improvement effect against horizontal excitation force in the event of an earthquake. (See arrows A1 to A3 and B1 to B3 similar to FIG. 2 shown in FIG. 20).

Also in this case, as in the case of the configuration of the second embodiment, it is sufficient to form a bolt insertion hole at the upper end of the wide web portion 2e that is the single wall and insert the bolt 51 therein. The connecting bracket 50 on the ceiling frame suspension member mounting bracket 61 side is sufficient if one bolt is provided at the center of the bottom of the mounting bracket main body 61a and the bolt insertion hole 52 is formed, so that the configuration and mounting are simplified.

However, since the bottom surface of the mounting bracket main body 61a and the upper end surface of the ceiling frame suspension member 2 are butted against each other with a wide contact area having a U-shaped cross section, the degree of integration after connection is high. It is high, and bending deformation in the direction orthogonal to the axis of the connecting portion is less likely to occur.

<Regarding Fourth Embodiment>
In the ceiling frame suspension structure according to the first embodiment described above, as the ceiling frame suspension member 2 made of a square steel material, a square tube having a rectangular cross section made of lightweight steel material (FIG. 7) is adopted, and its upper end portion is The pair of left and right connecting brackets 50a and 50b below the mounting bracket 61 are fitted inside and connected by the bolts 51.

However, the square steel material forming the ceiling frame suspension member 2 is not limited to such a rectangular tube having a rectangular cross section, and is an equilateral mountain shape made of a hook-shaped angle member as shown in FIGS. 21 and 22, for example. It can also be made of steel.

Even in the case of such an angle member made of equilateral mountain-shaped steel material, since it has one of the main body walls 2h and the other side wall portion 2h orthogonal to it in the angle shape (in the XY directions) (the mutual orthogonal portions are 2g)), although it does not have a closed cross-section like the above-mentioned rectangular cylinder, it has a sufficient anti-compression load, an effective ceiling frame strength improving action, an effective ceiling frame hanging strength improving action, and a horizontal vibration force. It is possible to realize an effective seismic resistance improving action against (see arrows A1 to A3 and B1 to B3 similar to FIG. 2 shown in FIG. 22).

Also in this case, as in the case of the configurations of the above-described second and third embodiments, a bolt insertion hole (2d: not shown) is provided at the upper end of the side wall portion 2h on one side which is the single wall. ) Is formed and the bolts 51 are inserted therethrough, the connecting bracket 50 on the ceiling frame suspension member mounting bracket 61 side is provided with only one bolt at the center of the bottom of the mounting bracket main body 61a and has a corresponding bolt insertion hole 52. Since it suffices if it is formed (see FIG. 18 ), the configuration and attachment are simplified.

However, since the bottom surface of the fitting main body 61a and the upper end surface of the ceiling frame suspension member 2 are butted against each other with a wide contact area in the XY direction of the hook shape in the cross-section, they are integrated after connection. The degree of conversion is high, and bending deformation in the direction orthogonal to the axis of the connecting portion is less likely to occur.

2 is a ceiling frame suspension member 4 is a diagonal reinforcing material (brace material)
10, H-section steel 10a, horizontal mounting edge 50 of H-section steel 50, connection bracket 50a, connection bracket 50b, connection bracket 51, bolt 52, nut 61, ceiling frame suspension member The mounting bracket 61a, the mounting bracket main body 61b, the fitting port 61c, the fastening bolt 61f, the pressing plate

Claims (6)

By forming the ceiling frame suspension member for suspending the ceiling frame with respect to the structure of the building from a lightweight square steel material, and attaching the upper end of the square steel material to the structure of the building through a square steel material fitting. A ceiling frame suspension structure configured to suspend a ceiling frame, wherein the structure of the building has a horizontal rectangular steel mounting edge, and the rectangular steel mounting bracket is attached to the upper end of the rectangular steel. A mounting body of a rectangular box structure that is connected and integrated with each other, and a U-shaped cross-section that is opened in the left and right side wall portions of the mounting body toward the horizontal rectangular steel mounting edges of the building structure. And the upper side or the lower side of the fitting port, and the upper side to the lower side or the lower side to the upper side after the fitting port is fitted to the rectangular steel material mounting edge of the building structure. And a fastening bolt for fixing the mounting bracket body to the rectangular steel mounting edge of the building structure, and a rectangular steel connecting bracket integrally provided on the bottom of the mounting bracket body. A ceiling characterized in that the rectangular steel material is connected and integrated into a coaxial structure by connecting via the connecting bracket in a state where the upper end surface of the rectangular steel material is in contact with the bottom surface of the mounting bracket body. Frame hanging structure. The ceiling frame suspension structure according to claim 1, wherein the square steel material is a square steel material having a tubular structure in cross section. The ceiling frame suspension structure according to claim 1, wherein the rectangular steel material is a lip channel steel material having a channel structure with a C-shaped cross section. The ceiling frame suspension structure according to claim 1, wherein the square steel material is a channel steel material having a channel structure with a U-shaped cross section. The ceiling frame suspension structure according to claim 1, wherein the square steel material is an equilateral angle steel material having an angled sectional structure. The ceiling frame suspension structure according to claim 1, 2, 3, 4, or 5, wherein the connection bracket is a hinge-structured connection bracket having a bolt insertion hole.

Images