JP6510324B2 - Existing equipment reinforcement structure of building structure - Google Patents

Description

  The present invention relates to an existing facility reinforcing structure of a building structure.

  On the back of the ceiling of the building structure, various installation objects inside the building structure, such as piping, ducts, lighting fixtures, air conditioners of the ceiling cassette type, etc. are supported by suspension bolts and the like suspended from the ceiling slab There is.

  Since the ceiling becomes an obstacle to the reinforcement work in reinforcing the support of the installation in the building structure, the procedure of temporarily dismantling the ceiling, reinforcing the support structure of the installation in the building structure, and rebuilding the ceiling But it was generally necessary.

  However, dismantling and construction of the ceiling takes man-hours and increases construction costs. For this reason, the existing equipment reinforcement structure of a building structure which can reinforce a support of the installation in a building structure is proposed, without disassembling a ceiling.

  Patent Document 1 discloses a fixing fitting 31 as shown in FIG. 3, which is fixed by clamping to an outer peripheral side surface of an existing suspension bolt 32. The fixing bracket 31 has the expanded portions 33, and reinforces the existing suspension bolts 32 by connecting the braces 34 to each of the expanded portions 33. The existing structure is supported by the suspension bolt 32.

  Patent Document 2 discloses a metal fitting main body 41 having a long hole 42 at the upper end and a metal fitting 40 having a support bolt 43 as shown in FIG. 4. The support bolt 43 is inserted into the long hole 42 of the metal fitting main body 41, and the metal fitting main body 41 is rotatably supported by the rotation support portion 44 formed at the lower end of the support bolt 43. The support bolt 43 is screwed and fixed to the nut for suspension support installed on the ceiling slab, the suspension bolt is screwed on the nut 45 installed at the lower end of the metal fitting main body 41, and the tip of this suspension bolt is already installed. By fixing it to the existing structure suspended from the suspension bolt, the structure is supported by the anti-vibration.

  Further, Patent Document 3 discloses a metal fitting 51 in which two U-shaped members 52 as shown in FIG. 5 are connected such that the openings thereof face each other. Both side surfaces of the reinforcing portion 53 of the I-shaped cross section of the floor plate exposed to the lower surface of the ceiling slab are clamped and fixed by the members 52. The structure is supported by a suspension bolt 54 connected to the fitting 51.

JP, 2014-125812, A JP, 2009-287615, A Japanese Utility Model Publication No. 06-012616

  In general, a suspension bolt is strong against tensile force but weak against compressive force, and may buckle when an external force such as seismic force acts. In the structure using the fixing bracket 31 described in Patent Document 1, when a compressive force acts on the existing suspension bolt 32, the suspension bolt 32 does not have a configuration that can sufficiently resist the compressive force, and thus the suspension bolt 32 is suspended. There is a risk that the bolt 32 will buckle.

  Also in the structure using the fixing bracket 40 described in Patent Document 2, there is a risk that the suspension bolt screwed to the nut 45 may buckle, as in the case of Patent Document 1. In addition, when installing the fixing bracket 40, it is necessary to form a hanging support nut for fixing the support bolt 43 in the ceiling slab, which takes time and effort.

  Also in the structure using the metal fitting described in Patent Document 3, there is a risk that the suspension bolt 54 may buckle, as in Patent Document 1. In addition, the installation of the metal fitting is premised on the presence of the reinforcing portion 53 of the floorboard plate exposed on the lower surface of the ceiling slab, which lacks versatility.

  An object of the present invention is to provide an existing facility reinforcing structure for a building structure, which prevents buckling of existing suspension bolts and has a small number of construction steps.

The present invention adopts the following means in order to solve the above problems. That is, the present invention is the existing facility of the existing structure which reinforces the above-mentioned suspension bolt for the existing facilities which support the installation in a building structure by a plurality of suspension bolts suspended below the frame of a building structure. A reinforced structure, comprising: a reinforcing steel material arranged along the suspension bolt, and fixing the upper end portion and the lower end portion of the suspension bolt and the reinforcing steel material by fixing members sandwiching and fixing them from the outside; Provide the existing equipment reinforcement structure of the structure.
According to the configuration as described above, since the reinforcing steel material is disposed along the lifting bolt, it is possible to prevent the lifting bolt from being buckled.
In addition, the suspension bolt can be reinforced simply by putting the reinforcing steel material along the existing suspension bolt and fixing it with the fixing tool, so that the installation is easy and easy, and from a narrow space such as an inspection opening But construction is possible.
In addition, since there is no need for special existing objects such as reinforcement parts for floorboards exposed on the lower surface of the ceiling slab, suspension bolts can be reinforced in any structure, and the construction is versatile. .

The reinforcing steel material may be an L-shaped steel, and the L-shaped steel may be disposed such that the suspension bolt is in contact with the inner side surfaces thereof.
According to such a configuration, since a general steel material is used as the reinforcing steel material, it is possible to reduce the cost for reinforcement.
In addition, if the suspension bolts are disposed in contact with the inner side surfaces of the L-shaped steel, it is possible to prevent relative movement between the suspension bolts and the L-shaped steel before fixing the suspension bolts and the L-shaped steel. It becomes easy.

The fixture comprises first and second members connected openably and closably by a hinge, and the suspension bolt and the reinforcing steel material are disposed between the opened first and second members, The suspension bolt and the reinforcing steel material may be fixed by closing the first and second members.
According to such a configuration, since the suspension bolt and the reinforcing steel material can be fixed by the operation of opening and closing the first and second members, installation becomes easy.

One end of an oblique member is connected to the fixture fixed to the upper end of one of the plurality of suspension bolts, and the fixture fixed to the lower end of the second suspension bolt among the plurality of suspension bolts One end of another oblique member may be connected to each other, and the other end of each of the oblique members may be connected by a turnbuckle.
According to such a configuration, since it becomes possible to fasten the existing suspension bolts with a diagonal member, for example, a steel material such as a steel rod, it becomes possible to prevent swinging of the suspension bolts, and existing facilities of the building structure The reinforcing structure can be further strengthened.

 ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the existing equipment reinforcement structure of a building structure which can prevent the buckling of a suspension bolt.

  In a preferable mode, it becomes possible to make construction easy.

It is a side view of the existing equipment reinforcement structure of the building structure shown as an embodiment of the present invention. They are the (a) top view and (b) perspective view which showed the installation condition of the fixing tool used in the existing equipment reinforcement structure of the building structure shown as embodiment of this invention. It is a perspective view of the conventional fixing bracket. It is a perspective view of the conventional metal fitting. It is the side view seen from the partial cross section of the existing equipment suspension structure which used the conventional metal fitting.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view of an existing facility reinforcing structure 1 of a building structure shown as an embodiment of the present invention.

  A ceiling 4 is suspended by a lifting bolt 3 or the like on the lower surface of the ceiling slab 2 of the building structure. The existing equipment is installed in the space between the ceiling slab 2 and the ceiling 4.

  The existing equipment is a structure in which various in-building installation objects 8 such as piping, ducts, lighting fixtures, and ceiling cassette type air conditioners are supported by suspension bolts 5. Specifically, the installation object 8 in the building structure is installed on the support steel material 6 installed between the lower end portions of the plurality of suspension bolts 5 suspended from the ceiling slab 2. The supporting steel material 6 is, for example, an L-shaped steel, and the lower end portion of the suspension bolt 5 is inserted into a hole (not shown) opened on the side surface of the L-shaped steel, and the nut 7 is screwed into the lower end portion of the suspension bolt 5 It is fixed to five.

  The reinforcing structure 1 shown as an embodiment of the present invention includes a reinforcing steel material 9 and a fixture 10, and the suspension bolt 5 of the existing equipment is reinforced by these.

  The reinforcing steel material 9 is disposed along the lifting bolt 5 of the existing equipment. For example, an L-shaped steel is used as the reinforcing steel material 9. That is, as shown in FIG. 2, the reinforcing steel material 9 includes the first plate portion 9 a and the second plate portion 9 b having the same length, and the first and second plate portions 9 a and 9 b are on the side It is formed by joining vertically. The L-shaped steel is disposed along substantially the entire length of the suspension bolt 5 from the vicinity of the upper end of the suspension bolt 5 to the vicinity of the lower end so that the suspension bolt 5 contacts the inner side surfaces thereof.

  As shown in FIG. 1, the fixture 10 is disposed in the vicinity of the upper ends of the suspension bolt 5 and the reinforcing steel material 9, and the upper ends of the suspension bolt 5 and the reinforcement steel 9 are pinched from the outside by the fixture 10. It is fixed. The fixture 10 is also disposed in the vicinity of the lower ends of the suspension bolt 5 and the reinforcement steel 9, and the lower ends of the suspension bolt 5 and the reinforcement steel 9 are sandwiched and fixed from outside by the fixture 10. .

  FIG. 2 is a view showing an installation state of the fixture 10 disposed in the vicinity of the upper end portion of the suspension bolt 5 and the reinforcing steel material 9. When arranged in the vicinity of the lower ends of the suspension bolt 5 and the reinforcing steel material 9, the fixture 10 is installed upside down. The fixture 10 comprises a first member 15 and a second member 16.

  The first member 15 is provided with a first plate portion 15a and a second plate portion 15b having the same length, and a cross-sectional shape in which the first and second plate portions 15a, 15b are vertically joined at each side Is a substantially L-shaped member. When the reinforcing steel material 9 is disposed such that the outer side surfaces of the first and second plate parts 9a and 9b of the reinforcing steel material 9 are in contact with the inner side surfaces of the first plate portion 15a and the second plate portion 15b, The first member 15 is formed such that the end 15 c in the width direction of the first member 15 is located outside the end 9 c in the width direction of the reinforcing steel material 9.

  The hinge 17 which connects the 2nd member 16 mentioned later so that opening and closing is possible is provided in the width direction edge part of the upper side in FIG.2 (b) of the 1st board part 15a. At the upper end of the second plate portion 15b, a hole 19 illustrated in FIG. 2A is opened. The hole 19 penetrates with the hole 21 of the second member 16 described later when the first and second members 15 and 16 are closed, as shown in FIG. positioned. Holes 20 are formed at lower ends of the first and second plate portions 15a and 15b.

  The second member 16 is provided with a first plate portion 16a and a second plate portion 16b having substantially the same length as the hinge 17, and the first and second plate portions 16a, 16b are curved portions 16d at their respective side edges. And a member having a substantially L-shaped cross section. When the reinforcing steel material 9 is disposed such that the respective inner side surfaces of the first and second plate portions 9a and 9b of the reinforcing steel material 9 contact the outer side surfaces of the first plate portion 16a and the second plate portion 16b, The second member 16 is formed such that the end side 16 c in the width direction of the second member 16 is located outside the end side 9 c in the width direction of the reinforcing steel material 9.

  The widthwise end of the first plate portion 16 a is connected to the hinge 17. A hole 21 is opened at the end of the second plate portion 16b. The holes 21 are positioned to penetrate the holes 19 of the first member 15 when the first and second members 15, 16 are closed.

  The curved portion 16 d of the second member 16 is formed such that the connection between the first plate portion 16 a and the second plate portion 16 b is recessed inward. The curved portion 16 d has a cross-sectional dimension that allows the suspension bolt 5 to be stored inside the recess. In addition, the first and second members 15 and 16 may be provided between the inner side surface of the first member 15 and the outer side surface of the second member 16 when these members are closed. The positions of each other are adjusted so that there is a space corresponding to the thickness, and the hinges 17 are connected to be openable and closable.

  With the curved portion 16 d and the distance between the first and second members 15 and 16, with the reinforcing steel material 9 and the suspension bolt 5 installed between the first and second members 15 and 16, the first And the second member 15, 16 can be closed by a hinge 17. Each figure of FIG. 2 is fixed to the reinforcing steel material 9 so that the reinforcing steel material 9 closely contacts the inner side surfaces of the first member 15 and the suspension bolt 5 closely contacts the inner side surfaces of the reinforcing steel material 9 A hinge 17 shows the second member 16 closed after the tool 10 is placed. In the drawing, the suspension bolt 5 is located in the curved portion 16 d of the second member 16.

  After the first and second members 15, 16 are closed by the hinge 17, as shown in FIG. 2 (a), the holes 19 of the first member 15 and the holes 21 of the second member 16 are removed. It is fixed by bolts and nuts 18 so as to be inserted. Thereby, the first and second members 15 and 16, the reinforcing steel material 9 and the suspension bolt 5 are press-fixed to each other.

  In the reinforcing structure 1 shown in FIG. 1, the fixtures 10 are installed above and below the left and right suspension bolts 5 respectively. One end of a diagonal member (steel rod) 11 is connected to one hole 20 of the first member 15 of each fixture 10. The other end of the diagonal member 11 connected to the fixture 10 on the left suspension bolt 5 and the other end of the diagonal member 11 connected to the fixture 10 below the right suspension bolt 5 have male threads. These two other ends are positioned to face each other and are screwed and fixed by the turnbuckle 12 having an internal thread. Similarly, the other end of the diagonal member 11 connected to the fixture 10 under the left suspension bolt 5 and the other end of the diagonal member 11 connected to the fixture 10 on the right suspension bolt 5 turn It is fixed by a buckle 12.

  The fixture 10 is preferably made of a member obtained by plating chromium or the like on iron, but is not limited thereto.

  Next, a method of reinforcing the suspension bolt 5 of the existing equipment with the reinforcing steel material 9 and the fixture 10 will be described.

  First, the suspension length of the suspension bolt 5 supporting the existing equipment is measured. Next, based on the weight of the existing equipment, the compression load and the bending load with respect to the assumed seismic force are calculated, and the cross section of the steel material that can withstand the compression load and the bending load is calculated. Furthermore, the steel material which satisfies the calculated cross-sectional specification is cut and processed into the measured suspension length to produce the reinforced steel material 9.

  Next, the reinforcing steel material 9 is placed along the suspension bolt 5. Then, after arranging fixing tool 10 in the state where the 1st and 2nd members 15 and 16 to which diagonal member 11 was connected opened, sandwiching reinforcement steel material 9 and suspension bolt 5, 1st and 2nd The members 15 and 16 are closed and fixed by bolts and nuts 18 so that the holes 19 of the first member 15 and the holes 21 of the second member 16 are inserted.

  Finally, the other end of the diagonal member 11 connected to the fixture 10 on the left suspension bolt 5 and the other end of the diagonal member 11 connected to the fixture 10 below the right suspension bolt 5 In addition, the other end of the diagonal member 11 connected to the fixture 10 under the left suspension bolt 5 and the other end of the diagonal member 11 connected to the fixture 10 on the right suspension bolt 5 are turned Connect with buckle 12 and secure.

  Next, the operation of the reinforcing structure 1 as described above will be described.

  In the reinforcing structure 1 described above, even if a compressive force acts on the suspension bolt 5 due to an earthquake or the like, the reinforcing steel material 9 fixed along the suspension bolt 5 bears the compressive force.

  As described above, in the reinforcing structure 1, the buckling of the suspension bolt 5 can be effectively prevented.

  Further, the reinforcement bolt 9 can be reinforced simply by aligning the reinforcing steel material 9 with the existing suspension bolt 5 and fixing it with the fixing tool 10. In addition, the same fixing tool 10 is used above and below the lifting bolt 5 so that erroneous installation in the field is eliminated. Thus, the construction is easy and time-consuming. Moreover, construction is possible even from a narrow space such as a ceiling inspection port.

  Moreover, since the special existing thing such as the reinforcement part of the plate for floorboards exposed to the ceiling slab 2 lower surface is not required, reinforcement of the suspension bolt 5 is possible in any structure, and versatility in construction is possible. There is.

  Moreover, since a general steel material is used as the reinforcement steel material 9, it is possible to reduce the cost for reinforcement.

  In addition, if the suspension bolts 5 are disposed in contact with the inner side surfaces of the L-shaped steel which is the reinforcing steel material 9, relative movement between the suspension bolt 5 and the L-shaped steel is prevented before fixing the suspension bolts and the L-shaped steel Installation is easy.

  Moreover, since it is possible to perform fixation of the suspension bolt 5 and the reinforcement steel material 9 by the operation | movement which opens and closes the 1st and 2nd members 15 and 16, flexible installation becomes easy.

  Moreover, since it becomes possible to fasten between the existing suspension bolts 5 with the diagonal member 11, it becomes possible to prevent the swing of the suspension bolts 5, and the reinforcement structure 1 can be further strengthened.

  In addition, rubber or the like is interposed between the first member 15 and the reinforcing steel material 9, the reinforcing steel material 9 and the suspension bolt 5, and the suspension bolt 5 and the second member 16, or the like to form the fixture 10. The adhesion between the two may be enhanced after fixation by the

  Depending on the size and shape of the installation 8 in the building structure, the connection by the oblique member 11 between the fixtures 10 may be difficult because the installation 8 in the building structure interferes. In such a case, when performing a treatment in which a force is transmitted between the fixtures 10 (between the suspension bolts 5), a horizontal member or the like may be used as an alternative treatment for the oblique member 11.

  In addition to the reinforcing structure 1 shown in FIG. 1, the diagonal bolt 11 and the turnbuckle 12 also between the suspension bolt 5 shown in FIG. 1 and the suspension bolt (not shown) located in front of or in the depth direction of the page. You may make a connection.

  In the above embodiment, the existing facility has a structure in which the installation object 8 in the building structure is installed on the support steel material 6 installed between the lower ends of the suspension bolts 5; In the case where the installation 8 is a ceiling cassette type air conditioner, etc., the installation 8 inside the building structure is supported by the suspension bolt 5 being directly connected without the support steel 6 being interposed. May be

  While the preferred embodiments of the present invention have been described above in detail, it will be appreciated by those skilled in the art that various modifications and equivalent embodiments are possible. .

  Accordingly, the scope of the present invention is not limited to this, and various modifications and improvements of those skilled in the art using the basic concept of the present invention described in the claims are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Existing facility reinforcement structure of building structure 2 Ceiling slab 3, 5 Suspension bolt 4 Ceiling 6 Support steel 7 Nut 8 Installation in building structure 9 Reinforcement steel 10 Fixture 11 Diagonal member 12 Turnbuckle 15 First member 16 Second member Members 17 hinges 18 bolts and nuts

Claims (4)

An existing facility reinforcing structure for a building structure, which reinforces the suspension bolts for existing facilities that support an installation in a building structure by a plurality of suspension bolts suspended below a frame of the building structure,
Reinforced steel is placed along the suspension bolt,
The upper end portion and the lower end portion of the suspension bolt and the reinforcing steel material are respectively fixed by clamps which sandwich and fix from the outer side ,
One L-shaped steel is provided as the reinforcing steel material for one of the suspension bolts, and the L-shaped steel is disposed such that the suspension bolts are in contact with both inner side surfaces thereof.
The fixture comprises first and second members openably connected by hinges,
The suspension bolt and the reinforcing steel material are fixed by arranging the suspension bolt and the reinforcing steel material between the opened first and second members, and closing the first and second members . Existing equipment reinforcement structure of a building structure. The first member comprises two plate portions provided to the L-shaped steel so as to contact each of the outer side surfaces of the L-shaped steel,
The second member includes two plate portions provided to the L-shaped steel so as to contact each of the inner side surfaces of the L-shaped steel,
The second member is provided with a curved portion provided between and connecting the two plate portions of the second member, and the second member is provided in contact with both inner side surfaces of the L-shaped steel. The building structure according to claim 1 , wherein the curved portion is formed to be curved to the opposite side to the L-shaped steel when being stored, and the suspension bolt is stored between the L-shaped steel and the curved portion. Equipment reinforcement structure of the object. The existing facility reinforcement structure of the building structure according to claim 1 or 2, wherein the fixtures fixed to each of two suspension bolts among the plurality of suspension bolts are connected by a horizontal member . One end of a diagonal member is connected to the fixture fixed to the upper end of one of the plurality of suspension bolts,
One end of another oblique member is connected to the fixture fixed to the lower end of the second one of the plurality of suspension bolts,
The existing equipment reinforcement structure of the building structure according to any one of claims 1 to 3, wherein the other ends of the respective diagonal members are connected by a turnbuckle.

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