JP6441107B2 - Ceiling structure - Google Patents

Description

  The present invention relates to a ceiling structure in which braces are provided in a ceiling space.

  Conventionally, because of the behavior of buildings during earthquakes, a large seismic force acts on the ceiling base and ceiling material, which may damage or drop the ceiling base and ceiling material. It has been proposed to provide seismic reinforcement. (See Patent Document 1).

The ceiling foundation includes a suspension bolt extending substantially vertically downward from the upper floor of the ceiling space, a field receiver provided at the lower end of the suspension bolt and extending horizontally, and supported by the field receiver. A field edge extending substantially perpendicular to the edge receiver and extending in the horizontal direction.
The brace is, for example, a lightweight steel frame member that is inclined with respect to a horizontal plane and extends linearly. The upper end of the brace is locked to the upper part of the suspension bolt via a brace fitting, and the lower end is a ceiling base. Locked to the field edge and the field edge.

  According to such a ceiling structure, when a horizontal seismic force acts on the ceiling material or ceiling base due to an earthquake, a tensile or compressive force acts on the brace to resist this seismic force. Can prevent shaking.

Japanese Patent No. 4464996

  The brace fitting described above is actually attached several centimeters below the casing of the ceiling space. Therefore, a bending moment is generated at the base of the suspension bolt (that is, the joint portion between the suspension bolt and the casing) due to the tensile force or the compression force acting on the brace. As a result, this bending moment may exceed the bending strength allowed for the suspension bolt, and there is a problem that the suspension bolt breaks due to plastic deformation or repeated bending.

  An object of the present invention is to provide a ceiling structure that can reliably prevent the suspension member from being bent and broken even when a tensile force or a compressive force is applied to the brace.

  The ceiling structure according to claim 1 (for example, a ceiling structure 1 described later) has a plate shape attached to a ceiling base (for example, a lightweight steel base 10 described below) provided in a ceiling space and a lower part of the ceiling base. A ceiling structure (for example, a ceiling material 20 described later) and a brace (for example, a reinforcing brace 30 described later) for connecting the upper and lower portions of the ceiling base, wherein the ceiling base is A plurality of suspension members (for example, a suspension bolt 11 described later) extending downward from an upper-level housing (for example, a later-described housing 2), and a rod-shaped base member (for example, a field edge receiver described later) supported by the suspension member 12 and a field edge 13), and an attachment jig (for example, attachment jigs 14 and 14A described later) to which the upper end of the brace is joined is fixed to the upper-level frame using the suspension member. It is characterized by being .

  According to the present invention, the mounting jig to which the upper end portion of the brace is joined is fixed to the upper-floor housing using the suspension member, so that the central axis of the upper end portion of the brace is the joint portion between the suspension member and the housing. It passes through the vicinity, that is, almost the base of the suspension member. Therefore, even if a tensile force or a compressive force is applied to the brace, almost no moment is generated in the suspension member, so that it is possible to reliably prevent the suspension member from being bent and broken.

The ceiling structure according to claim 1 , wherein the mounting jig is provided on a lower surface of the housing and is provided upright on a flat plate-like base portion (for example, a base portion 40 to be described later) through which the suspension member penetrates. Plate-like wall portions (for example, wall portions 50 and 50A described later) to which the braces are connected, and nuts (for example, nuts 60 and 60A described later) are screwed into the suspension members. The base is pressed against the lower surface of the housing.

According to this invention, the attachment jig is attached to the suspension member, and the brace is connected to the attachment jig. Therefore, the brace can be easily attached to the suspension member via the attachment jig.
Further, when a tensile force or a compressive force is applied to the brace, a shearing force is applied between the base portion and the housing. According to the present invention, the nut is screwed into the suspension member and the base is pressed against the lower surface of the housing, so that not only the shear stress of the suspension member but also the friction between the base and the housing against this shearing force. Can resist with force.

  Here, it is preferable that the wall portion is provided with a plurality of through holes (for example, through holes 51A to 51F described later) at different positions, and the braces are selectively fixed to the through holes.

  If it does in this way, it chooses suitably from a plurality of through-holes, and by fixing a brace to this selected through-hole, according to the angle with respect to the horizontal surface of a brace, the central axis of this brace will be a suspension member and a housing. It can be easily set to pass through the vicinity of the joint portion. Therefore, the versatility of the mounting jig is improved.

In the ceiling structure according to claim 1 , the base portion includes two members (for example, a first base portion 41 and a first base portion described later) in which slits (for example, slits 411 and 421 described below) formed from the central portion to one edge are formed. The two base portions 42) are overlapped, and the portion where the slits overlap each other is a through hole (for example, a through hole 43 described later) through which the suspension member passes.

According to this invention, the two members are overlapped, and the portion where the slits of these members overlap is defined as a through hole through which the suspension member passes. Therefore, the attachment jig can be easily attached to the existing ceiling base.
Since the brace is arranged avoiding the equipment and beam type in the ceiling, it is difficult to accurately place it in the design position, but according to this invention, the mounting jig can be retrofitted to the hanging member, The mounting position of the mounting jig can be adjusted at the construction stage.

The ceiling structure according to claim 2 , wherein the nut has two half nuts (for example, described later) in which a slit (for example, a slit 611 described later) is formed and overlapped with a slit extending from the center to one edge. A half nut 61) and a lock member (for example, a lock member 62 described later) covering the two half nuts are provided.

According to this invention, the mounting jig can be reliably fixed to the suspension member and the housing by tightening the nut.
Here, the half nuts were overlapped, and the portion where the slits of these half nuts overlapped was defined as a screw hole into which the suspension member was screwed. And the relative position of these half nuts was hold | maintained with the lock member. Therefore, the nut can be easily attached to the existing ceiling base.

  According to the present invention, since the attachment jig to which the upper end of the brace is joined is fixed to the upper-floor housing using the suspension member, the central axis of the upper end of the brace is the joint portion between the suspension member and the housing. It passes through the vicinity, that is, almost the base of the suspension member. Therefore, even if a tensile force or a compressive force is applied to the brace, almost no moment is generated in the suspension member, so that it is possible to reliably prevent the suspension member from being bent and broken.

It is sectional drawing of the ceiling structure which concerns on 1st Embodiment of this invention. It is sectional drawing of the attachment jig | tool of the ceiling structure which concerns on the said embodiment. It is AA sectional drawing of FIG. It is a figure for demonstrating the structure of the base of the attachment jig which concerns on the said embodiment. It is a figure for demonstrating the structure of the nut used for the attachment jig concerning the embodiment. It is a figure for demonstrating the force which acts on the attachment jig which concerns on the said embodiment. It is the top view which looked up at the attachment jig concerning a 2nd embodiment of the present invention from the lower part. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a figure for demonstrating the structure of the base of the attachment jig which concerns on the said embodiment. Explains the structure of the joint portion between the wall portion and the brace of the mounting jig according to the embodiment. It is sectional drawing of the nut which concerns on 2nd Embodiment of this invention, and the top view looked up from the downward direction. It is a figure for demonstrating the structure of the nut which concerns on the said embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
FIG. 1 is a cross-sectional view of a ceiling structure 1 according to the first embodiment of the present invention.

  The ceiling structure 1 includes a lightweight steel base 10 as a ceiling base provided in a ceiling space, a plate-like ceiling material 20 attached to the lower part of the lightweight steel base 10, and an upper part and a lower part of the lightweight steel base 10. And a reinforcing brace 30 to be connected.

The lightweight steel base 10 includes a plurality of suspension bolts 11 as a plurality of suspension members that extend downward from the upper frame 2 of the upper floor of the ceiling, and a plurality of foundations that are supported by the suspension bolts 11 and extend in a bar shape substantially horizontally and substantially parallel to each other. A field edge receiver 12 as a member and a field edge 13 as a plurality of base members supported by these field edge receivers 12 and extending in a bar shape substantially orthogonal to the field edge receiver 12 and substantially parallel to each other. .
The reinforcing brace 30 is joined to the mounting jig 14, and the mounting jig 14 is fixed to the upper floor housing 2 using the suspension bolts 11.

FIG. 2 is a cross-sectional view of the mounting jig 14. FIG. 3 is a cross-sectional view taken along the line AA of FIG.
The mounting jig 14 includes a flat base 40 provided on the lower surface of the housing 2 and through which the suspension bolt 11 passes, and a plate-like wall 50 that is erected on the base 40 and to which the reinforcing brace 30 is connected. Have.
The suspension bolt 11 is engraved with screws over the entire circumference and is screwed into the insert 3 driven into the housing 2. A nut 60 that presses the base 40 against the lower surface of the housing 2 is screwed onto the suspension bolt 11.

The base 40 is configured by overlapping a first base 41 and a second base 42 as two plate-like members formed with slits extending from the central part to one edge (see FIG. 4).
The first base 41 is formed with a slit 411 extending from the center to one edge.
In addition, a locking portion 412 is erected on the outside of the wall portion 50 of the first base portion 41.

The second base portion 42 is formed with a slit 421 extending from the central portion to one edge, and the wall portion 50 is formed on the second base portion 42.
The second base portion 42 and the wall portion 50 are integrally formed of angle steel, and a pair of stiffeners 52 is provided between the second base portion 42 and the wall portion 50.

  A through hole 70 is formed in the first base portion 41 and the second base portion 42, and a concrete screw 71 reaching the housing 2 is driven into the through hole 70. With this concrete screw 71, when a tensile force or a compressive force is applied to the reinforcing brace 30, it is possible to prevent the mounting jig 14 from rotating by this tensile force or compressive force.

As shown in FIG. 4, the first base 41 and the second base 42 are overlapped with each other by sandwiching the suspension bolt 11 between the slit 411 of the first base 41 and the slit 421 of the second base 42. A portion overlapping with 421 becomes a through hole 43 through which the suspension bolt 11 is inserted.
At this time, the second base 42 is locked to the locking portion 412 of the first base 41 to prevent the first base 41 and the second base 42 from relatively moving in the in-plane direction.

The reinforcing brace 30 is a square steel pipe, and a through hole 31 is provided on the upper end side.
The wall 50 is provided with a plurality of through holes 51A, 51B, 51C, 51D, and the reinforcing brace 30 is selectively bolted to the through holes 51A to 51D. In the present embodiment, the reinforcement brace 30 is bolted to the through hole 51B.

  That is, the bolt 44 is inserted into the through hole 51 </ b> B of the wall 50 and the through hole 31 of the reinforcing brace 30, and the nut 45 is screwed into the bolt 44, so that the reinforcing brace 30 can rotate to the wall 50. Supported by

Further, by attaching the reinforcing brace 30 to the through hole 51A and setting the angle of the reinforcing brace 30 with respect to the horizontal plane to 45 °, the central axis of the reinforcing brace 30 is the root of the suspension bolt 11 (that is, the suspension bolt 11 and the casing). 2).
Similarly, the reinforcing brace 30 is attached to the through holes 51B to 51D, and the angles of the reinforcing brace 30 with respect to the horizontal plane are set to 50 °, 55 °, and 60 °, respectively. 11 (that is, a joint portion between the suspension bolt 11 and the housing 2).

As shown in FIG. 5, the nut 60 includes two half nuts 61 in which slits 611 extending from the central portion to one edge are formed and arranged in a stacked manner, and a lock member 62 that covers the two half nuts 61. And comprising.
The half nut 61 is formed with a slit 611 extending from the center to one edge. A screw is engraved on the inner end side of the slit 611.
By sandwiching the suspension bolt 11 from both sides with the slits 611 of the half nuts 61 and overlapping the half nuts 61, the overlapping portion of the slits 611 becomes a screw hole 63 into which the suspension bolt 11 is screwed.

  The lock member 62 has a box shape with open side surfaces, and is formed with a slit 621 extending from the center to one edge. By storing the half nut 61 in the lock member 62 in a stacked state, the lock member 62 maintains the relative position between the half nuts 61.

Next, a procedure for attaching the reinforcing brace 30 to the existing ceiling base 10 will be described.
First, the suspension bolt 11 is inserted into the mounting jig 14. That is, the through hole 43 is formed by arranging the first base 41 and the second base 42 so as to sandwich the suspension bolt 11, and the suspension bolt 11 is inserted into the through hole 43.

  Next, the attachment jig 14 is fixed to the housing 2 by attaching and tightening the nut 60 to the suspension bolt 11. That is, the suspension bolt 11 is sandwiched between the half nuts 61. In this state, the half nut 61 is housed in the lock member 62, and the nut 60 is tightened.

  Next, the reinforcing brace 30 is attached to the attachment jig 14. That is, the bolt 44 and the nut 45 are appropriately selected from the through holes 51A to 51D of the wall 50 according to the angle of the reinforcing brace 30 with respect to the horizontal plane so that the central axis of the reinforcing brace 30 passes through the base of the suspension bolt 11. Is used to fix the reinforcing brace 30 to the selected through-hole.

  According to the mounting jig 14, as shown in FIG. 6, since the central axis of the reinforcing brace 30 passes through the base of the suspension bolt 11, even if a tensile force P acts on the reinforcement brace 30, a moment is applied to the suspension bolt 11. M does not occur, and only the shearing force Q acts between the housing 2 and the base 40 or the suspension bolt 11. The same result is obtained not only when the tensile force P is applied but also when a compressive force is applied to the reinforcing brace 30.

According to this embodiment, there are the following effects.
(1) Since the attachment jig 14 to which the upper end portion of the reinforcing brace 30 is joined is fixed to the housing 2 using the suspension bolt 11, the central axis of the upper end portion of the reinforcing brace 30 is between the suspension bolt 11 and the housing 2. It passes through the vicinity of the joint portion, that is, almost the base of the suspension bolt 11. Therefore, even if the tensile force P or the compressive force is applied to the reinforcing brace 30, almost no moment is generated in the suspension bolt 11, so that it is possible to reliably prevent the suspension bolt 11 from being bent and broken.

(2) The attachment jig 14 was attached to the suspension bolt 11, and the reinforcing brace 30 was connected to the attachment jig 14. Therefore, the reinforcing brace 30 can be easily attached to the suspension bolt 11 via the attachment jig 14.
Further, when a tensile force P or a compressive force is applied to the reinforcing brace 30, a shearing force is applied between the base portion 40 and the housing 2, but a nut 60 is screwed onto the suspension bolt 11 so that the base portion 40 is attached to the housing 2. Since it pressed to the lower surface, it can resist not only the shearing stress of the suspension bolt 11 but also the frictional force between the base 40 and the housing 2 against this shearing force.

  (3) The central axis of the reinforcing brace 30 is selected appropriately from the plurality of through holes 51A to 51F, and the reinforcing brace 30 is fixed to the selected through hole, so that the central axis of the reinforcing brace 30 depends on the angle of the reinforcing brace 30 with respect to the horizontal plane. Can be easily set so as to pass through the vicinity of the joint between the suspension bolt 11 and the housing 2. Therefore, the versatility of the mounting jig 14 is improved.

(4) The first base portion 41 and the second base portion 42 are overlapped, and a portion where the slits 411 and 421 overlap is defined as a through hole 43 through which the suspension bolt 11 passes. Therefore, the attachment jig 14 can be easily attached also to the existing ceiling base.
Moreover, since the attachment jig 14 can be retrofitted to the suspension bolt 11, the position with the attachment jig 14 can be adjusted at the construction stage.

(5) By tightening the nut 60, the attachment jig 14 can be reliably fixed to the suspension bolt 11 and the housing 2.
Here, the half nuts 61 are overlapped, and the portion where the slits 611 of the half nuts 61 overlap is defined as a screw hole 63 into which the suspension bolt 11 is screwed. And the relative position of these half nuts 61 was hold | maintained with the locking member 62. FIG. Therefore, the nut 60 can be easily attached to the existing ceiling base.

[Second Embodiment]
FIG. 7 is a plan view of the mounting jig 14A according to the second embodiment of the present invention as viewed from below. 8 is a cross-sectional view taken along the line BB of FIG. 7, and FIG. 9 is a cross-sectional view taken along the line CC of FIG.
In this embodiment, the point which supported the reinforcement brace 30 with a pair of wall part 50A differs from 1st Embodiment, and the other structure is the same as that of 1st Embodiment.

That is, the mounting jig 14A is provided on the lower surface of the housing 2 and has a flat plate-like base portion 40 through which the suspension bolt 11 passes, and a pair of plate-like wall portions that are erected on the base portion 40 and to which the reinforcing brace 30 is connected. 50A.
The pair of wall portions 50 </ b> A are formed on the first base portion 41 so as to face each other. The locking portion 412 is erected on the edge between the pair of wall portions 50 </ b> A of the first base portion 41.

  As shown in FIG. 10, the slits 411 and slits are formed by overlapping the first base 41 and the second base 42 with the suspension bolt 11 sandwiched between the slit 411 of the first base 41 and the slit 421 of the second base 42. A portion overlapping with 421 becomes a through hole 43 through which the suspension bolt 11 is inserted.

The upper end portion of the reinforcing brace 30 is disposed between the pair of wall portions 50A.
The pair of wall portions 50A are provided with a plurality of through holes 51A, 51B, 51C, 51D, 51E, and 51F, and the reinforcing brace 30 is selectively bolted to the through holes 51A to 51F. In the present embodiment, the reinforcing brace 30 is bolted to the through hole 51C.

  As shown in FIG. 11, the bolt 44 is inserted into the through hole 51 </ b> C of the wall portion 50 </ b> A and the through hole 31 of the reinforcement brace 30, and nuts 45 and 46 are screwed into the bolt 44, whereby the reinforcement brace 30 is , And is rotatably joined to the pair of wall portions 50A. Specifically, the bolt 44 and the nut 45 sandwich the reinforcing brace 30 and the one wall portion 50A, and the pair of nuts 46 sandwich the other wall portion 50A.

  In the present embodiment, the reinforcing brace 30 is attached to the through holes 51A to 51F, and the angles of the reinforcing brace 30 with respect to the horizontal plane are set to 45 °, 48 °, 51 °, 54 °, 57 °, and 60 °, respectively. The central axis of the reinforcing brace 30 passes through the base of the suspension bolt 11 (that is, the joint portion between the suspension bolt 11 and the housing 2).

  According to the present embodiment, the same effects as the above (1) to (5) are obtained.

[Third Embodiment]
FIG. 12 is a cross-sectional view and a plan view seen from below of a nut 60A according to the third embodiment of the present invention.
In the present embodiment, the point that a nut 60A is used instead of the nut 60 is different from the first and second embodiments, and other configurations are the same as those of the first and second embodiments.

That is, the nut 60 </ b> A includes a female plate 81 in which a slit 811 is formed, a male plate 82 that fits into the slit 811 of the female plate 81, and a lock member 83 that covers these plates 81 and 82.
The slit 811 of the female plate 81 extends from the center of the female plate 81 to one edge, and a screw is engraved on the inner end side of the slit 811.

  The male plate 82 has a recess 821, and a screw is engraved in the recess 821. The male plate 82 is fitted into the slit 811 of the female plate 81 from the out-of-plane direction and is not pulled away in the in-plane direction.

  As shown in FIG. 13, the suspension bolt 11 is sandwiched from both sides by the slit 811 of the female plate 81 and the recess 821 of the male plate 82, and the male plate 82 is fitted into the slit 811 of the female plate 81, thereby A portion formed by the recess 821 becomes a screw hole 84 into which the suspension bolt 11 is screwed.

  The lock member 83 has a box shape with open side surfaces, and is formed with a slit 831 extending from the center to one edge. By storing the male plate 82 in the lock member 83 in a state where the male plate 82 is fitted to the female plate 81, the lock member 83 maintains the relative position between the female plate 81 and the male plate 82.

  According to the present embodiment, the same effects as the above (1) to (5) are obtained.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in each of the above-described embodiments, the nuts 60 and 60A can be retrofitted to the suspension bolt 11 by combining a plurality of members. However, the present invention is not limited to this, and a normal nut is previously fitted to the suspension bolt. Also good.

  Further, in each of the above-described embodiments, by adjusting the tightening torque of the nuts 60 and 60A, the shearing force generated when the tensile force P acts on the reinforcing brace 30 is borne by the shearing strength of the suspension bolt 11. Alternatively, it may be borne by the frictional force between the housing 2 and the base 40. Note that when the shearing force is borne by the frictional force between the housing 2 and the base 40, the concrete screw 71 is not necessary.

  In each of the above-described embodiments, the present invention is applied to a ceiling whose ceiling surface is substantially horizontal. However, the present invention is not limited to this, and the present invention can also be applied to an oblique ceiling in which the ceiling surface is inclined with respect to a horizontal plane.

DESCRIPTION OF SYMBOLS 1 ... Ceiling structure 2 ... Housing 3 ... Insert 10 ... Light-weight steel foundation (ceiling foundation)
11 ... Suspension bolt (suspending member)
12 ... Field edge (base material)
13 ... Field edge (underlying member)
DESCRIPTION OF SYMBOLS 14, 14A ... Mounting jig 20 ... Ceiling material 30 ... Reinforcement brace 31 ... Through-hole 40 ... Base 41 ... 1st base (member)
42 ... Second base (member)
43 ... Through hole 44 ... Bolt 45, 46 ... Nut 50, 50A ... Wall 51A, 51B, 51C, 51D, 51E, 51F ... Through hole 52 ... Stiffener 60, 60A ... Nut 61 ... Half nut 62 ... Lock member 63 ... Screw hole 70 ... Through hole 71 ... Concrete screw 81 ... Female plate 82 ... Male plate 83 ... Lock member 84 ... Screw hole 411 ... Slit 412 ... Locking part 421 ... Slit 611 ... Slit 621 ... Slit 811 ... Slit 821 ... Recess 831 ... Slit

Claims (2)

A ceiling structure comprising a ceiling foundation provided in a ceiling space, a plate-like ceiling material attached to a lower end of the ceiling foundation, and a brace that connects an upper portion and a lower portion of the ceiling foundation,
The ceiling foundation includes a plurality of suspension members extending downward from the upper floor housing, and a rod-shaped foundation member supported by the suspension members,
A mounting jig to which the upper end of the brace is joined is fixed to the upper-floor housing using the suspension member ,
The mounting jig includes a flat plate-like base portion through which the suspension member passes, and a plate-like wall portion that is erected on the base portion and to which the brace is connected.
The base portion is configured by overlapping two members formed with slits extending from the center portion to one edge, and the portion where the slits overlap is a through hole through which the suspension member passes,
A ceiling structure , wherein a nut is screwed onto the suspension member, and the base is pressed against the lower surface of the housing by the nut . The said nut is provided with the slit which extends from the center part to one edge, and is arrange | positioned in piles, and the lock member which covers the said two half nuts, It is characterized by the above-mentioned. The ceiling structure according to 1 .

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