JP4806239B2 - Reinforcement bracket for suspended ceiling - Google Patents

Description

  The present invention relates to a reinforcing metal fitting for a suspended ceiling. For example, a ceiling structural frame that is framed by a ceiling base material composed of a main bar and a cross bar is suspended from an upper floor slab or the like and arranged at an important point. The present invention relates to a reinforcing metal fitting used for a suspended ceiling constructed by hanging and supporting a bolt at a lower end side via a hanging metal fitting.

  Conventionally, a ceiling structural frame that is framed by a ceiling base material composed of a main bar and a cross bar is suspended from the lower end side of a suspension bolt that is suspended from an upper floor slab, for example, and suspended at a key point. Suspended ceilings constructed by hanging and supporting via metal fittings are known (see, for example, Patent Document 1 and Patent Document 2).

By the way, the suspension fitting attached to the lower end side of the suspension bolt and supporting the ceiling structure frame is generally formed in the structure disclosed in Patent Document 1, Patent Document 2, and the like. is there. An example is shown in FIG.
As shown in FIG. 7, the hanging metal fitting 6 is composed of a metal fitting body 6a formed by bending using a belt-like plate material, and a clamping member 6b also formed of a plate material.
Then, as shown in FIG. 8, the metal fitting body 6a has an upper edge 1a of the main bar 1 of the main bar 1 or the cross bar 2 that frames the ceiling structural frame, and the other frame sandwiching portion 12 described later. One frame sandwiching portion 11 sandwiched and suspended is provided on the lower end side, and a horizontal attachment portion 10 having a bolt insertion hole 9 is provided on the upper end side.
The metal fitting body 6a is attached by upper and lower nuts 8 to the lower end side of the suspension bolt 5 which is provided at a main point with the attachment portion 10 suspended from an upper floor slab (not shown), for example. Here, one of the upper and lower nuts 8 attached to the suspension bolt 5 so as to sandwich the attachment portion 10 from above and below is a lock nut for preventing loosening after the attachment.

  The clamping member 6b includes the other frame clamping portion 12, and as shown in FIG. 7A, the latching head 14 is latched to the latching window 13 provided on the lower end side of the metal fitting body 6a. And, it is formed so that it can be attached to the lower end side of the metal fitting body 6a by screwing with a screw 16 to the screw hole 15 provided on the lower end side (see FIGS. 7B and 8).

  The suspended ceiling constructed so as to suspend and support the ceiling structure frame via the suspension fitting 6 on the lower end side of the suspension bolt 5 is placed on the ceiling structure frame when an earthquake occurs. For example, it is required to have earthquake resistance to prevent dropping of, for example, lighting equipment, air conditioning equipment, and ceiling panels attached to the ceiling structure frame.

  Therefore, as shown in FIG. 8, a suspension bolt 5 that is suspended from an upper floor slab or the like located directly above the connecting intersection of the main bar 1 and the crossbar 2, and the suspension bolt 5 On the other hand, by reinforcing the brace material 7 diagonally between other adjacent suspension bolts 5 (see FIG. 2 below), the vertical and horizontal shaking, especially the rolling, when an earthquake occurs We are trying to strengthen the earthquake resistance against.

  In other words, since the installation work for constructing the suspended ceiling and the construction work for constructing the building including the surrounding walls, etc. are performed separately, the area around the ceiling structural frame of the suspended ceiling and the building It is not in contact with the wall (not shown). For this reason, since the ceiling structural frame suspended and supported only by the suspension bolts 5 swings like a pendulum when an earthquake or the like occurs, the brace material 7 is arranged diagonally between the adjacent suspension bolts 5 like a brace. It was necessary to provide the suspended ceiling with seismic resistance to suppress shaking.

Further, when the ceiling structural frame is framed by the main bar 1 and the cross bar 2, the cross bar 2 has a pair of connecting pieces formed at the end portions as shown in FIGS. 9 (a) and 9 (b). 17 are opposed to each other across the main bar 1 (state (a)), and the connecting pieces 17 are inserted and connected (engaged) with each other via the connecting window 18 opened in the main bar 1 (( b)). As a result, the main body 1 is suspended and supported by the suspension bolts 5 via the suspension brackets 6 and arranged in parallel at regular intervals. (See FIG. 8 and FIG. 2 described later).
Japanese Patent Laid-Open No. 9-13571 (see paragraph numbers 0011 to 0013, FIGS. 3 and 4) Japanese Unexamined Patent Publication No. 2003-13540 (see paragraph numbers 0015 to 0018, FIG. 2, FIG. 6 and FIG. 9)

  By the way, since the metal fitting body 6a constituting the hanging metal fitting 6 is formed by bending using a strip-like plate material having a narrow width as described above, the inclined lower end side of the brace material 7 is attached to the metal fitting body 6a itself. It cannot be installed directly. In particular, it cannot be attached in the out-of-plane (plate thickness) direction of the metal fitting body 6a indicated by the arrow X in FIG. Therefore, the current situation is that the inclined lower end side of the brace material 7 is attached to the lower end side portion of the suspension bolt 5 to which the attaching portion 10 of the metal fitting body 6a is attached.

Accordingly, an earthquake occurs in the out-of-plane (plate thickness) direction of the metal fitting body 6a, which is inferior in earthquake resistance as compared to the in-plane (plate width) direction (arrangement direction of the main bar 1) of the metal fitting body 6a indicated by the arrow Y in FIG. When the above occurs, the metal fitting body 6a shakes greatly starting from the bent continuous connection portion with the attachment portion 10 with respect to the suspension bolt 5.
And this shaking will generate | occur | produce over the whole region of the ceiling structure frame in the arrangement | positioning direction of the cross bar 2 connected and assembled | attached linearly via the connection window 18 of the main bar 1. As shown in FIG. That is, the hanging metal fitting 6 holds the main bar 1 in a state in which the in-plane (plate width) direction of the metal fitting body 6a is directed to the arrangement direction (length direction) of the main bar 1 indicated by the arrow Y in FIG. 6b, the above-described shaking phenomenon occurs.

From such a situation, from the attachment site P1 of the suspension fitting 6 to the suspension bolt 5 shown in FIG. 7B and FIG. 8 to the clamping portion P2 of the ceiling structural frame (main bar 1) sandwiched and supported by the suspension fitting 6. The current situation is that the concern about seismic resistance has not been resolved in the range L.
Therefore, when an earthquake or the like occurs, a large swaying occurs in the range L from the attachment site P1 to the clamping site P2 starting from the above-described bent connecting portion, and the upper side of the main bar 1 sandwiched and suspended by the hanging bracket 6 The edge portion 1a, the frame sandwiching portion 11 of the metal fitting body 6a that sandwiches and holds the upper edge portion 1a, and the frame sandwiching portion 12 of the sandwiching member 6b repeat torsional moments and bending moments caused to the entire suspended ceiling due to shaking. In the worst case, the upper edge 1a of the main bar 1 may come off the hanging bracket 6 and the ceiling structure frame may collapse.

  By the way, when the suspended ceiling is shaken by an earthquake or the like, the shake is applied to the main bar and the crossbar as a horizontal torsional moment or bending moment, and the suspended ceiling (ceiling structure frame) is wavy. In particular, it is presumed that the torsional moment and the bending moment are concentrated at the connecting intersection between the main bar and the crossbar that are held by the hanging bracket. Therefore, there is a possibility that the upper edge portion of the main bar sandwiched and held by the hanging bracket is damaged, or the hanging bracket itself is damaged.

  Further, as described above, when the swaying is large in the range L from the attachment part P1 of the suspension metal fitting 6 to the suspension bolt 5 to the sandwiching part P2 of the ceiling structure frame, it is connected and incorporated linearly via the main bar 1. The connection state of the connection pieces 17 of the crossbar 2 is lost, which causes the above-described collapse of the ceiling structural frame.

  Therefore, the present invention was devised to solve the above-described problems, and can improve the vibration resistance in the out-of-plane (plate thickness) direction of the metal fitting body made of the plate material of the hanging metal fitting. In the (plate width) direction, the earthquake resistance can be further strengthened, the connection between the crossbars can be strengthened, and it can be easily attached to the existing suspended ceiling by retrofitting. The purpose of this study is to provide an effective reinforcing bracket for the seismic strengthening of suspended ceilings.

In order to solve the above-mentioned problems, in claim 1, a suspension structure constructed by supporting a ceiling structure frame framed by a ceiling base material by hanging a suspension bolt on a suspension point via a hanging bracket. Reinforcing metal fittings used for a ceiling, comprising a reinforcing surface portion that is formed in a range from the suspension bolt to the ceiling base material, and is attached to be attached along the ceiling base material, the reinforcing surface portion Is provided with a recessed portion that opens downward in the center in the edge direction on the lower end edge side, and at the intersection of the main bar and the cross bar that frame the ceiling structure frame, via the main bar The two crossbars connected in a straight line are formed so as to be addressed in a state of straddling the main bar.
Moreover, in Claim 2, the reinforcement metal fitting used for the suspended ceiling constructed | assembled by suspending and supporting the ceiling structure frame framed by the ceiling base material to the suspension bolt arrange | positioned through the suspension metal fitting in the important place. And a reinforcing surface portion that is attached to and attached so as to be along the ceiling base material, and the reinforcing surface portion is provided at a lower edge portion at a central portion in an edge direction, and is provided below. It includes a concave portion which is opened toward, in the connecting intersection of the main bar and the cross bar framework the ceiling structural frame, across one of the two cross bars are linearly connected through the main bar In this state, it is formed so as to be addressed to the main bar .
Here, as the attachment of the reinforcing surface portion to the ceiling base material, if the material of the ceiling base material and the material of the reinforcing surface portion are the same, the attachment by welding is possible, but the attachment by screwing is preferable. Become. Moreover, it becomes suitable that the said reinforcement surface part is formed in a wide shape in the range which reaches the lower end edge side attached to the said ceiling base material (Claim 3).

According to the configuration described in claims 1 and 2, the connection strength between the suspension bolt and the ceiling structure frame is reinforced by the suspension bracket by the reinforcement bracket including the reinforcing surface portion attached to the ceiling base material that frames the ceiling structure frame. be able to. In other words, the earthquake resistance of the ceiling structural frame can be enhanced.
And, when the ceiling base material that frames the ceiling structural frame is composed of a main bar and a cross bar, in the connecting intersection of the main bar and the cross bar, for example, in the in-plane (plate width) direction of a hanging bracket made of a plate material On the other hand, the reinforcing surface portion is made of a plate material in addition to the strengthening of the connection strength described above, by attaching the reinforcing surface portion to the crossbar or the main bar with screws so that the in-plane (plate width) direction of the reinforcing surface portion is orthogonal. Therefore, the reinforcement surface portion can enhance the earthquake resistance against the rolling in the out-of-plane (plate thickness) direction of the hanging metal fitting, which is inferior in earthquake resistance compared to the in-plane (plate width) direction.
Moreover, according to the structure of Claim 1, in the connection crossing part of a main bar and a cross bar, it is a wide reinforcement surface part between both cross bars connected and assembled | attached linearly via a main bar by a notch part. Can be addressed with certainty. Thereby, a reinforcement surface part is attached to both crossbars by screwing etc., and the connection state of crossbars can be strengthened.
Moreover, by configuring as in claim 3, the reinforcing surface portion so that the in-plane (plate width) direction of the wide reinforcing surface portion is orthogonal to the in-plane (plate width) direction of the hanging bracket. By attaching to the cross bar or the main bar with screws, it is possible to further effectively enhance the earthquake resistance against rolling in the out-of-plane (plate thickness) direction of the hanging bracket.

In addition, it is preferable to further provide the attachment part attached to the said suspension bolt at the upper end of the said reinforcement surface part (Claim 6). Moreover, it is preferable that the said attachment part is equipped with the bolt insertion part formed in planar view substantially U shape which open | released one end .

According to the structure of Claim 6 , the reinforcement metal fitting can be additionally attached by loosening the nut which attached the hanging metal fitting to the hanging bolt, and interposing between this nut and the attaching part of the said metal fitting. . That is, it is possible to easily impart earthquake resistance to the existing suspended ceiling hanging bracket by the retrofitting method and effectively enhance the earthquake resistance strength of the hanging bracket.

According to a fourth aspect of the present invention, the reinforcing surface portion includes a holding portion that holds the upper side edge portion of the cross bar.

According to the configuration of the fourth aspect , the reinforcing surface portion can be attached to the cross bar or the main bar in a state where the holding portion is sandwiched and held at the upper edge portion of the cross bar.
That is, the reinforcing surface portion is crossbar or crossbar by a synergistic effect of the screwing action of screwing the reinforcing surface portion according to claim 1 to the crossbar or the main bar and the holding action of the crossbar or the main bar by the sandwiching portion. Can be firmly attached to the main bar. In other words, the cross bar or the main bar can be firmly attached to and supported by the reinforcing bracket.

According to a fifth aspect of the present invention, the reinforcing surface portion also serves as a brace attaching portion for attaching an inclined lower end side of a brace material attached obliquely between the suspension bolts.
Here, the attachment of the brace material to the reinforcing surface portion is not particularly limited, and examples thereof include welding or screwing.

According to the fifth aspect of the present invention, by attaching the inclined lower end side of the brace material to the reinforcing surface portion of the reinforcing metal fitting attached to the hanging bolt together with the hanging metal fitting, the reinforcement position by the brace material is set to the ceiling structural frame of the hanging metal fitting. It can be brought closer (lowered) to the clamping part side. Thereby, the earthquake resistance of the hanging bracket is imparted, and the earthquake resistance against the swing of the hanging bracket is enhanced.

Since the reinforcing bracket for the suspended ceiling according to the present invention is configured as described above, the reinforcing bracket attached to the hanging bolt in the same manner as the hanging bracket allows the connection strength between the hanging bolt and the ceiling structure frame to be increased by the hanging bracket. Can be strengthened. In other words, the earthquake resistance of the ceiling structural frame can be enhanced.
And, at the connecting intersection of the main bar and the cross bar, the in-plane (plate width) direction of the reinforcing surface portion of the reinforcing bracket is orthogonal to the in-plane (plate width) direction of the hanging bracket formed of, for example, a plate material. In addition to strengthening the connection strength as described above by attaching the reinforcing surface part so as to reach the cross bar or main bar, it is made of plate material, so it is more earthquake resistant than the in-plane (plate width) direction. The reinforced surface portion can enhance the earthquake resistance against rolling in the out-of-plane (plate thickness) direction of the hanging metal fitting which is inferior. Therefore, it is possible to reliably impart enhanced seismic resistance against torsional moments and bending moments caused by shaking to the suspension fittings attached to the suspension bolts and sandwiching and suspending the ceiling structure frame.

  In addition, at the connecting intersection between the main bar and the cross bar, the wide reinforcing surface portion may be surely addressed between the two cross bars connected and assembled linearly via the main bar by the recessed portion. it can. Thereby, a reinforcement surface part can be attached to both crossbars by screwing etc., and the connection state of crossbars can be strengthened. This is effective in preventing measures such as the disconnection state of the crossbars coming off due to rolling or the like when an earthquake occurs.

In addition, by attaching the slanted lower end side of the brace material to the reinforcing surface part of the reinforcing bracket that is attached to the suspension bolt together with the hanging bracket, the reinforcement position by the brace material is brought closer (lowered) to the clamping part side of the ceiling structure frame by the hanging bracket. Can do. Thereby, the earthquake-proof strength with respect to a suspension metal fitting can be strengthened with the reinforcement metal fitting to which the brace material was connected.
Therefore, it is possible to suppress the shaking of the ceiling structure frame supported by being suspended by the suspension bolt via the suspension fitting. That is, the eccentric distance from the clamping part of the ceiling structure frame by the hanging metal fitting that suspends the crossbar or the main bar is shortened. As a result, the torsional moment and the bending moment acting on the ceiling structure frame via the hanging metal fitting at the time of the occurrence of the earthquake are reduced, thereby suppressing the shaking of the ceiling structure frame.

  As described above, according to the present invention, the retrofitting method or the like imparts earthquake resistance in the out-of-plane (plate thickness) direction of the hanging bracket made of a plate material, and more in the in-plane (plate width) direction of the hanging bracket. It can be further strengthened. In addition, there is a completely new suspension ceiling reinforcement bracket that can effectively improve the high earthquake resistance and reliability, such as the ability to strengthen the connection state of crossbars that are connected and integrated linearly via the main bar. Can be provided.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a reinforcing bracket for a suspended ceiling according to the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is a perspective view showing an embodiment of a suspended ceiling reinforcing bracket according to the present invention, FIG. 2 is a perspective view showing a reinforcing state of the suspended ceiling using the reinforcing bracket, and FIG. FIG. 4 is a longitudinal sectional view in FIG. 3.
Here, an example of a system ceiling will be described as a suspended ceiling.

≪Description of system ceiling≫
System ceilings include grid, cross, and line types. As an example, a grid type system ceiling is shown in FIG.
As shown in FIG. 2, the grid type system ceiling has a ceiling structure frame 4 that is framed in a substantially lattice pattern with the main bar 1 and the crossbar 2 being equally spaced, for example, an upper floor slab (not shown). It is a suspended ceiling constructed by hanging and supporting the suspension bolt 5 via a hanging bracket 6 on the lower end side of each suspension bolt 5 that is suspended from a location and suspended.
In the system ceiling constructed in such a manner, a ceiling panel (ceiling board) 29 is attached to each section of the ceiling structural frame 4, and lighting fixtures and air conditioners (not shown) are installed behind the ceiling. It has come to be.

  Of the suspension bolts 5 that suspend and support the ceiling structural frame 4, the suspension bolts 5 that are suspended from the upper floor slab located directly above the intersection of the main bar 1 and the crossbar 2 The brace material 7 is reinforced diagonally between the suspension bolt 5 and the other adjacent suspension bolt 5.

  By attaching the brace material 7 in this way, the seismic resistance against torsional moment and bending moment caused to the entire system ceiling by the shaking, especially when the earthquake occurs, is enhanced. At this time, as shown in FIGS. 2 and 3, the reinforcing metal fitting 3 is attached to the lower end side of the suspension bolt 5 together with the hanging metal fitting 6, and the inclined lower end side of the brace material 7 is attached to the reinforcing surface portion 3 b described later of the reinforcing metal fitting 3. It is attached and connected by welding or screwing.

≪Explanation of hanging bracket≫
The suspension metal fitting 6 will be briefly described by giving the same reference numerals since it is basically the same as the configuration described in detail in the conventional example (FIG. 7).
That is, the hanging metal fitting 6 is composed of two members, a metal fitting body 6a and a clamping member 6b.

≪Description of bracket body≫
The metal fitting body 6a is integrally formed of a metal plate having a desired thickness that is excellent in rigidity and corrosion resistance. As shown in FIG. 7, the fitting portion has a bolt insertion hole 9 on the upper end side. 10 is formed so that it can be attached to the suspension bolt 5 with a nut 8 (see FIG. 7B). Then, as shown in FIG. 7, at the lower end side of the metal fitting body 6 a, one frame sandwiching portion 11 formed in a concave shape along the cross-sectional shape of the upper edge portions 1 a and 2 a of the main bar 1 and the crossbar 2 is provided. I have.

≪Description of clamping members≫
The sandwiching member 6b is integrally formed of a plate material or the like like the metal fitting body 6a. As shown in FIG. 7, the holding member 6b is formed to have the same plate width as the plate width of the metal fitting body 6a in the strip shape, and has one frame. The other frame sandwiching portion 12 formed in a concave shape along the sandwiching portion 11 is provided on the lower half side.

≪Explanation of reinforcement bracket≫
The reinforcing metal fitting 3 is integrally formed by punching using a metal plate material having a desired plate thickness excellent in rigidity and corrosion resistance, and performing processing such as bending, as shown in FIG. Further, a horizontal mounting portion 3a is provided on the upper end side, and a reinforcing surface portion 3b is provided that is bent from the mounting portion 3a in a substantially vertical manner.

≪Description of mounting part≫
As shown in FIG. 1, the mounting portion 3 a has an appropriate inclination angle and a plate width (for example, about the same width as the plate width of the bracket body 6 a of the hanging bracket 6) from the central portion in the plate width direction of the reinforcing surface portion 3 b. It is formed by bending the upper end side of the connecting portion 3c provided in a neck shape horizontally. And this attachment part 3a is equipped with the bolt insertion part 19 formed so that planar view might open in a substantially U shape from one edge part side, and as shown in FIG. It is formed so that it can be attached to the suspension bolt 5 together with the suspension fitting 6 while being sandwiched between the nut 10 and the nut 8.

≪Explanation of reinforcement surface part≫
The reinforcing surface portion 3b is attached so that the lower edge side thereof is aligned with the cross bar 2 or the main bar 1, so that the ceiling structural frame 4 and the suspension bolt 5 are joined together like the suspension fitting 6 (connection). On the other hand, as shown in FIG. 3, the brace material 7 is formed so as to serve also as a brace attachment portion 20 to which the inclined lower end side is attached.
That is, as shown in FIGS. 1 and 2, the reinforcing surface portion 3 b is formed in a wide shape having a plate width that extends along the upper edge portion 2 a of both crossbars 2 across the main bar 1. . And the recessed part 21 opened toward the downward direction is provided in the lower end edge side of this reinforcement surface part 3b.

  Although not shown in the drawing, reinforcing ribs are provided on the reinforcing surface portion 3b by drawing or other processing so as to give bending strength (surface strength) in the height direction and width direction of the reinforcing surface portion 3b. Of course, it is optional.

≪Description of recessed part≫
The recessed portion 21 is an appropriate opening that avoids interference with the main bar 1 when the reinforcing surface portion 3b is attached to the upper side edge portions 2a, 2a of the cross bars 2, 2 that are linearly connected via the main bar 1. It is formed in the edge direction center part of the lower end edge of the reinforcement surface part 3b by width and opening height shape.
In this way, by providing the recessed portion 21, as shown in FIG. 3, at the connecting intersection of the main bar 1 and the crossbar 2 suspended by the hanging bracket 6, a straight line is formed via the main bar 1. The crossbars 2 and 2 connected to each other can be routed along the lower edge of the reinforcing surface portion 3b in a state of straddling the main bar 1.

  As shown in FIG. 1, screw insertion holes 22, 22 are opened at the lower end edge of the reinforcing surface portion 3 b, and the reinforcing surface portion 3 b is attached to the upper side edge portion 2 a of the crossbar 2 by a tapping screw 23. It can be attached and connected to the upper edge 2a (see FIG. 4). Thereby, the reinforcement metal fitting 3 can connect the suspension bolt 5 and the ceiling structure frame 4 together with the suspension fitting 6, and the connection strength between the suspension bolt 5 and the ceiling structure frame 4 can be strengthened by the suspension fitting 6. In other words, the earthquake resistance of the ceiling structural frame 4 can be enhanced.

  The screw insertion holes 22 and 22 are not limited to one each as shown in the figure, and may be provided at two to three locations, and are arbitrary. That is, although not shown, the number is arbitrarily set according to the plate width of the reinforcing surface portion 3b, and the lower end edge sides of the reinforcing surface portion 3b sandwiching the recessed portion 21 are respectively attached by several tapping screws 23. It can be optional.

Further, on both lower edge sides of the reinforcing surface portion 3b sandwiching the recessed portion 21, there is provided a clamping portion that holds the upper edge portion 1a of the main bar 1 or the upper edge portion 2a of the cross bar 2 so as to be sandwiched from above and below. .
As shown in FIG. 1, in order to strengthen the bending strength in the height direction of the reinforcing surface portion 3b, the sandwiching portion is provided on both side edges by bending both side edges of the reinforcing surface portion 3b over almost the entire height of the reinforcing surface portion 3b. Along the lower end 26 of the reinforcing edge 25, a projecting piece 27 that is bent from both side edges of the opening of the recessed portion 21 at the same horizontal level as the lower end 26, and a lower edge of the reinforcing surface 3b. And the upper edge of both crossbars 2 and 2 formed by a hook 28 provided at the lower edge and connected linearly via the main bar 1 as shown in FIGS. The parts 2a and 2a are sandwiched and held from above and below, respectively.

Next, reinforcement of the system ceiling using the reinforcing metal fitting 3 of the present embodiment configured as described above will be briefly described with reference to the drawings as appropriate.
First, as shown in FIG. 2 and FIG. 3, an upper floor slab (not shown) or the like located immediately above the intersection at the connecting intersection of the main bar 1 and the crossbar 2 that frame the ceiling structural frame 4. The attachment part 10 of the metal fitting body 6a of the hanging metal fitting 6 is attached by the nut 8 to the lower end side of the hanging bolt 5 that is suspended from the suspension and arranged toward the connecting intersection. Prepare for. At this time, the level of the height of the ceiling structural frame 4 is adjusted by the lower nut 8 and the mounting height position of the hanging bracket 6 with respect to the suspension bolt 5 is adjusted, but the upper nut 8 is fully tightened. Be prepared in a temporarily fixed state.

  After the mounting level of the hanging bracket 6 with respect to the hanging bolt 5 is completed, the in-plane (plate width) direction of the bracket body 6a is directed to the arrangement direction (length direction) of the main bar 1 indicated by the arrow Y in FIG. In such a state, set one frame sandwiching portion 11 of the metal fitting body 6a and the other frame sandwiching portion 12 of the sandwiching member 6b so as to sandwich the upper edge portion 1a of the main bar 1, and tighten the screws 16 to the upper side. The edge 1a is sandwiched and suspended (see FIG. 4).

In this way, after the ceiling structural frame 4 is suspended and supported by the suspension bolt 5 via the suspension bracket 6, the reinforcement bracket 3 is reinforced in the in-plane (plate width) direction of the bracket body 6 a of the suspension bracket 6. The reinforcing metal fitting 3 is attached in a direction in which the in-plane (plate width) direction of the surface portion 3b is orthogonal.
That is, the mounting portion 3a of the reinforcing bracket 3 is temporarily fixed so that the in-plane (plate width) direction of the reinforcing surface portion 3b faces the arrangement direction (straight line connecting direction) of the crossbar 2 indicated by the arrow X in FIG. Between the nut 8 and the mounting portion 10 of the hanging metal fitting 6 and the reinforcing surface portion 3b across the main bar 1 by the recess 21 to the upper edge portions 2a, 2a of the cross bars 2, 2. Address them so that they are along.
Thereby, the clamping part which consists of the lower end part 26 of the both-sides reinforcement edge part 25 provided in the both lower edge edge side of the reinforcement surface part 3b which pinches | interposes the recessed part 21, the protrusion piece part 27, and the latching | locking part 28 is interposed via the main bar 1. The upper edge portions 2a and 2a are set on the upper edge portions 2a and 2a so as to sandwich and hold the upper edge portions 2a and 2a of the crossbars 2 and 2 that are linearly connected from above and below (see FIGS. 3 and 4).

Thereafter, the reinforcing surface portion 3b is attached to the upper edge portions 2a and 2a of the crossbars 2 and 2 by the tapping screws 23, and the nut 8 in the temporarily fixed state is finally tightened to attach the attaching portion 3a of the reinforcing bracket 3 Then, fixing between the nut 8 and the attachment portion 6 b of the hanging bracket 6, the reinforcing bracket 3 is attached to the suspension bolt 5 together with the hanging bracket 6.
Thus, after attaching the reinforcing bracket 3 to the suspension bolt 5 together with the hanging bracket 6, as shown in FIG. 2, the inclined lower end side of the brace material 7 disposed obliquely is connected to the reinforcing surface portion 3b ( It is attached to the brace attaching part 20) by welding or screwing (see FIG. 3).
The construction procedure described above is merely an example, and the present invention is not limited to this.

  Thus, according to the reinforcing metal fitting 3 of the present embodiment, in the plane (plate width) of the metal fitting body 6a of the hanging metal fitting 6 indicated by the arrow Y in FIG. By attaching the reinforcing surface portion 3b to the main bar 1 with the tapping screw 23 so that the in-plane (plate width) direction of the reinforcing surface portion 3b is orthogonal to the direction, it is made of a plate material and thus in the in-plane (plate width) direction. The reinforcement surface portion 3b can enhance the earthquake resistance against rolling in the out-of-plane (plate thickness) direction (direction indicated by the arrow X in FIG. 3) of the metal fitting body 6a of the hanging metal fitting 6 that is inferior in earthquake resistance.

  Moreover, the connection state of crossbars 2 and 2 can be strengthened by attaching the reinforcement surface part 3b to both crossbars 2 and 2 in the connection crossing part of the main bar 1 and the crossbar 2. FIG. This is effective as a preventive measure for preventing the connection state between the crossbars 2 and 2 from coming off due to rolling or the like when an earthquake occurs.

  Further, by attaching the inclined lower end side of the brace material 7 to the reinforcing surface portion 3b of the reinforcing metal fitting 3, the connection reinforcing position by the brace material 7 is brought closer (lowered) to the holding part P2 side of the ceiling structural frame 4 by the hanging metal fitting 6. (See FIG. 6B). That is, the eccentric distance from the clamping part P2 of the ceiling structure frame 4 by the hanging metal fitting 6 that suspends the main bar 1 to the connection reinforcing position by the brace material 7 is shortened. Thereby, the torsional moment and bending moment which act on the ceiling structure frame 4 via the hanging metal fitting 6 at the time of the occurrence of an earthquake can be reduced.

[Description of other usages of reinforcing brackets]
FIG. 5 is an enlarged perspective view showing another usage form (attachment form) of the reinforcing metal fitting.
In such a use form, as shown in FIG. 5, the reinforcing metal fitting 3 is suspended together with the hanging metal fitting 6 so that the reinforcing surface portion 3 b of the reinforcing metal fitting 3 is applied to the metal fitting body 6 a of the hanging metal fitting 6 that holds the main bar. It is attached to the bolt 5 so that the main bar 1 can be supported by being suspended from the suspension bolt 5 together with the suspension bracket 6, and the inclined lower end side of the brace material 7 is placed on the holding part P2 side of the ceiling structure frame 4 by the suspension bracket 6. It can be installed close to.

That is, the mounting of the reinforcing metal fitting 3 so that the in-plane (plate width) direction of the reinforcing surface portion 3b of the reinforcing metal fitting 3 faces the in-plane (plate width) direction of the metal fitting body 6a of the hanging metal fitting 6 that suspends the main bar. The part 3a is interposed between the nut 8 in the temporarily fixed state and the mounting part 10 of the hanging bracket 6, and the reinforcing surface part 3b is connected to the upper side of the main bar 1 with the recessed part 21 straddling the cross bar 2. Address along the edge 1a.
Thereby, the clamping part which consists of the lower end part 26 of the both-sides reinforcement edge part 25 provided in the lower end edge side of the reinforcement surface part 3b, the protrusion piece part 27, and the latching | locking part 28 pinches the upper edge part 1a of the main bar 1 from the upper and lower sides In this way, it is set to the upper edge 1a.

  In this way, by attaching the reinforcing metal fitting 3 together with the hanging metal fitting 6 to the hanging bolt 5 so as to support the ceiling structural frame 4 in a suspended manner, the brace material 7 is utilized using the reinforcing surface portion 3b as shown in FIG. Can be attached close to the ceiling structure frame 4, and the plate thickness is increased by the metal fitting body 6 a and the reinforcing surface portion 3 b of the hanging metal fitting 6, so that the ceiling structure frame 4 is supported by being suspended. An increase in strength can be expected.

[Description of other embodiments of reinforcing bracket]
FIG. 6 is a perspective view showing another embodiment of the reinforcing bracket for a suspended ceiling according to the present invention.
As shown in FIG. 6, the reinforcing metal fitting 3 of such an embodiment is provided with holding members 24 on both lower end sides of the reinforcing surface portion 3 b that holds the above-described recessed portion 21.
In such an embodiment, in the configuration other than the sandwiching member 24 provided on the reinforcing surface portion 3b, the same reference numerals are given to the same components because the configuration is basically the same as the configuration of the reinforcing metal fitting 3 in the above-described embodiment. Therefore, redundant explanation is omitted.

≪Description of clamping members≫
The clamping member 24 supports the upper side edge portions 2a and 1a of the cross bar 2 or the main bar 1 by the lower end portion 26 and the latching portion 28 of the reinforcing surface portion 3b, as shown in FIG. In addition, it is formed so as to be provided with screws 31 at both lower ends of the reinforcing surface part 3b sandwiching the recessed part 21, and a latching part 30 is provided.

As shown in FIG. 6, the clamping member 24 has a height (width) corresponding to the bending height of the reinforcing edge portion 25 of the reinforcing surface portion 3 b by bending using a plate material, and the reinforcing edge portion 25. Are formed in a substantially box shape with an opening on the lower surface having a size enough to be set between the protrusion 27 and the protrusion 27. Then, the latching portion 30 is bent and provided at the lower surface of the lower surface, so that the upper side edge portions 2a and 1a of the cross bar 2 or the main bar 1 are sandwiched and held by the latching portion 28 of the reinforcing surface portion 3b. .
That is, the clamping member 24 is similar to the above-described sandwiching and suspending of the upper edge portions 2a and 1a of the cross bar 2 or the main bar 1 by the frame sandwiching portions 11 and 12 between the metal fitting body 6a and the clamping member 6b of the hanging metal fitting 6. It is formed to be provided on the reinforcing surface portion 3b so as to sandwich and hold the upper edge portions 2a and 1a.

  Further, as shown in FIG. 6, the clamping member 24 is provided with a bolt insertion hole 22 opposed to the bolt insertion hole 22 provided on the reinforcing surface portion 3b on the same axis as the cross bar. 2 and the upper edge portions 2a and 1a of the main bar 1 are attached and connected together with the reinforcing surface portion 3b by the tapping screw 23 described above.

  Thus, according to the reinforcing metal fitting 3 of this embodiment provided with the clamping member 24, the lower end edge side of the reinforcing surface portion 3b can be attached more firmly by the upper side edge portions 2a and 1a of the cross bar 2 and the main bar 1. . That is, the reinforcing metal fitting 3 can be attached to and supported by the cross bar 2 or the main bar 1 by the same holding action as the holding of the cross bar 2 or the upper edge 2a, 1a of the main bar 1 by the hanging metal fitting 6.

The specific configuration of the embodiment of the present invention is not limited to the above-described embodiment, and there is a change in the design within the scope of the present invention described in claims 1 to 6 without departing from the gist of the present invention. However, it is included in the present invention.
For example, the plate width of the horizontal mounting portion 3a of the reinforcing bracket 3 is formed to be the same width as the plate width of the vertical reinforcing surface portion 3b, and the overall shape of the reinforcing bracket 3 including the mounting portion 3a and the reinforcing surface portion 3b is rectangular. (Rectangular shape) is arbitrary.
Further, the reinforcing surface portion 3b is formed in a substantially cross shape in plan view, and the main bar 1 and the cross bar 2 are both connected to and supported by the suspension bolt 5 at the connecting intersection of the main bar 1 and the cross bar 2. The reinforcing metal fitting may be configured as described above, and is optional.

  Moreover, you may form the metal fitting main body 6a which comprises the hanging metal fitting 6 using pipe materials and bar materials, such as a square shape including a round shape and a polygon.

  Further, the ceiling base material for framing the ceiling structural frame 4 is not limited to the main bar 1 and the cross bar 2 and can include a field edge or a field edge receiver made of a channel material or the like. In this case, it is preferable to form the reinforcing surface portion 3b so that the reinforcing surface portion 3b of the reinforcing metal fitting 3 can be attached along the field edge receiver or the field edge. Moreover, as a hanging metal fitting used in this case, a metal fitting body formed by bending a band-shaped plate material and an attachment portion having a bolt insertion hole on the upper end side upward from an intermediate portion on the lower end side of the metal fitting main body. The sandwiching piece portion is integrally formed by folding it so as to be folded back in a substantially U shape.

  Further, when the reinforcing metal fitting 3 is attached by retrofitting, as shown in FIG. 8, the metal fitting body 6a of the hanging metal fitting 6 is attached to the existing system ceiling in which the inclined lower end side of the brace material 7 is already attached to the hanging bolt 5. The reinforcing metal fitting 3 may be attached so that the reinforcing surface portions 3b are orthogonal to each other. Thereby, the rigidity of the out-of-plane (plate thickness) direction of the hanging bracket 6 can be strengthened, and shaking due to an earthquake or the like can be suppressed.

It is a perspective view which shows embodiment of the reinforcement metal fitting of the system ceiling which concerns on this invention. It is a perspective view which shows the reinforcement state of the system ceiling using a reinforcement metal fitting. FIG. 3 is an enlarged perspective view showing a part (main part) of FIG. 2. It is a longitudinal cross-sectional view in FIG. It is an expansion perspective view which shows the other usage pattern of the reinforcement metal fitting of the system ceiling which concerns on this invention. It is an expansion perspective view which shows other embodiment of the reinforcement metal fittings of the system ceiling which concerns on this invention. A general embodiment of a hanging metal fitting is shown, (a) is a perspective view of a state in which the metal fitting main body and the clamping member are separated, and (b) is a front view showing a state in which the hanging metal fitting is attached to a hanging bolt. It is. It is an expansion perspective view which shows the reinforcement state by the brace material in a system ceiling conventionally. It is a perspective view which shows the assembly | attachment state of the main bar and cross bar which comprise the ceiling structural frame of a system ceiling, (a) shows the state before attaching a cross bar, (b) is crossed via a main bar. The bar is connected and assembled in a straight line.

Explanation of symbols

1 Main bar (ceiling base material)
2 Crossbar (ceiling base material)
DESCRIPTION OF SYMBOLS 1a, 2a Upper edge part 3 Reinforcement metal fitting 3a Attachment part 3b Reinforcement surface part 4 Ceiling structure frame 5 Suspension bolt 6 Suspension metal fitting 6a Metal fitting body 6b Holding member 7 Brace material 8 Nut 11, 12 Frame clamping part 19 Bolt insertion part 20 Brace attachment part 21 recessed part 26 lower end part (clamping part)
27 Projection piece (clamping part)
28 Latching part (clamping part)
30 latching part (clamping part)

Claims (6)

A reinforcing bracket used for a suspended ceiling constructed by hanging and supporting a ceiling structural frame that is framed by a ceiling base material on a hanging bolt arranged at a key point via a hanging bracket,
Is formed in a range extending to the hanging bolt or al the ceiling base member includes a reinforcing surface portion destined is attached to crack as along the ceiling base member,
The reinforcing surface portion includes a recessed portion opened downward at a central portion in the edge direction on the lower end edge side, and the main bar is connected to the main bar and the cross bar that frame the ceiling structure frame. The suspended ceiling reinforcing bracket is formed so as to be addressed in a state of straddling the main bar to both crossbars connected in a straight line via the cable . A reinforcing bracket used for a suspended ceiling constructed by hanging and supporting a ceiling structural frame that is framed by a ceiling base material on a hanging bolt arranged at a key point via a hanging bracket,
Along with the hanging bracket and a reinforcing surface portion attached and attached so as to be along the ceiling base material,
The reinforcing surface portion includes a recessed portion opened downward at a central portion in the edge direction on the lower end edge side, and the main bar is connected to the main bar and the cross bar that frame the ceiling structure frame. A suspended bracket reinforcing bracket, wherein the bracket is formed so as to be addressed to the main bar in a state of straddling one of the crossbars that are linearly connected via each other . The reinforcement bracket for a suspended ceiling according to claim 1 or 2, wherein the reinforcing surface portion is formed in a wide shape in a range reaching a lower end edge side attached to the ceiling base material. The said reinforcement surface part is provided with the clamping part hold | maintained so that the upper edge part of the said cross bar may be inserted | pinched, The reinforcement metal fitting of the suspended ceiling of any one of Claim 1 to 3 characterized by the above-mentioned. The suspended ceiling according to any one of claims 1 to 4, wherein the reinforcing surface portion also serves as a brace attachment portion for attaching an inclined lower end side of a brace material attached obliquely between the suspension bolts. Reinforcing metal fittings. The suspension bracket reinforcement bracket according to any one of claims 1 to 5 , further comprising an attachment portion attached to the suspension bolt at an upper end of the reinforcement surface portion.

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