JP2014125812A - Brace connecting fitting and brace construction method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brace connecting fitting that facilitates construction when a brace with recently required seismic control strength is connected to a hanging bolt and that is excellent in working efficiency, and a brace construction method using the brace connecting fitting.SOLUTION: A brace connecting fitting 1 includes a pair of expansion parts 23 that have a pair of opened tip parts extended in an expansion direction at a predetermined angle in an approximately U-shaped fixing bracket 2 attached in a sandwiched state and fixed on an outer peripheral side surface of a hanging bolt 10. A support bolt 16 is attached to each of the pair of expansion parts 23. A pair of angle members 3, to which a brace 11 can be attached, is held in an angle-adjustable manner by the support bolt 16.

Description

  The present invention relates to a brace coupling fitting for attaching a brace serving as a seismic reinforcement to a suspension bolt that supports a ceiling structure or the like, and a brace construction method using the same.

  The suspension bolts provided so as to hang down from the ceiling slab suspend and support various ceiling structures such as air conditioners, lighting fixtures, and various pipes. Conventionally, a technology is known in which a brace serving as an oblique reinforcement is attached to this type of suspension bolt to suppress vibration of the suspension bolt and prevent a ceiling structure from dropping in the event of an earthquake ( Patent Documents 1 and 2).

  For example, Patent Document 1 discloses a planar U-shaped sandwiched body that is sandwiched between side surfaces of a suspension bolt, a connection bolt that penetrates and fixes an open end of the sandwiched body, and a vertical swing on the connection bolt. A suspension bolt steadying metal fitting is disclosed which comprises a slanted support body coupled to a brace that is movably coupled and is disposed obliquely with respect to the suspension bolt. Further, Patent Document 2 includes a fixing portion for fixing a suspension bolt so as to hold it, and an attachment portion for attaching a brace, and a pair of extending portions extending from the fixing portion are bolts and nuts. When a fastener is fastened and fixed, a fitting is disclosed in which the attachment portion is connected to the fixed portion by sandwiching and fastening the perforated portion formed in the attachment portion between the pair of extending portions. Yes.

JP 2002-339918 A JP 2012-87860 A

  By the way, in recent years, it has been pointed out that it is not possible to obtain sufficient seismic control strength when an unexpected large-scale earthquake occurs only by attaching one brace to a suspension bolt. Therefore, for example, when braces are attached to four suspension bolts that suspend and support four points around a ceiling structure such as an air conditioner, two braces are cross-arranged between the two adjacent suspension bolts. However, it is required to dramatically increase the vibration suppression effect of the suspension bolt by connecting at least two braces to the upper and lower portions of each suspension bolt.

  However, since the prior arts such as Patent Documents 1 and 2 attach only one brace to one bracket, two brackets are used when two braces are connected to one place of a suspension bolt. It is necessary to install braces. Therefore, for example, when attaching braces by retrofitting to a large number of suspension bolts hanging from a ceiling slab such as an existing building, there is a problem that work efficiency is poor.

  In addition, each of the above-mentioned conventional metal fittings has an arm-like attachment portion (an oblique support) for attaching a brace between a pair of extending portions that are extended from a fixing portion that is attached so as to hold a suspension bolt. Since the stretched part is fastened with bolts and nuts in the sandwiched state, it is necessary to prepare the brackets and mounting parts separately before construction, and to assemble them during construction . At this time, the operator first sets the metal fitting temporarily to the suspension bolt, holds the mounting portion in one hand and positions it between the pair of extending portions, and attaches the bolt held in the other hand to the pair of extending portions. By inserting the mounting portion into the bracket, the attaching portion is temporarily attached to the metal fitting, and then the nut is further attached to the bolt. However, various ceiling structures are suspended and supported in the ceiling space, and it may be difficult to secure a sufficient working space, and it is difficult to assemble disjoint members in the ceiling space. Therefore, it takes a lot of construction time to install braces having seismic control strength required in recent years, and there is a problem that the construction cost increases.

  Therefore, in order to solve the above-described conventional problems, the present invention is a metal fitting for connecting a brace having a seismic control strength required in recent years to a suspension bolt, is easy to construct, and has excellent work efficiency, and An object of the present invention is to provide a brace construction method using the brace coupling fitting.

  In order to achieve the above object, the invention according to claim 1 is a brace coupling fitting that is mounted on the outer peripheral surface of the suspension bolt and connects the suspension bolt and the brace, and is mounted along the outer peripheral surface of the suspension bolt. A mounting portion having a substantially C-shape in plan view, and a connecting hole into which the connecting bolt can be inserted by extending the open tip of the mounting portion, and the connecting bolt is fastened to the mounting hole. A pair of fixing parts that clamp the parts to the suspension bolts, and a pair of expansion parts that form a through hole into which the support bolts can be inserted by further extending the tip parts of the pair of fixing parts at a predetermined angle in the expanding direction. The brace is held at an angle adjustable around the axis of the support bolt by a fixing metal fitting having an opening, and the support bolt inserted into the through-hole formed in the pair of expansion portions. A pair that can be mounted at an angle of And angle members, a structure which is characterized in that it comprises.

  According to such a configuration, when the brace connecting bracket is applied to the suspension bolt, it is not necessary to sandwich the member for connecting the brace between the pair of fixing portions, so that it is possible to efficiently perform the operation and one brace connection. If the bracket is attached to the suspension bolt, two braces can be connected to the suspension bolt.

  According to a second aspect of the present invention, in the brace coupling bracket according to the first aspect, each of the pair of expanded portions in the fixing bracket is expanded at an angle of approximately 45 degrees with respect to an extension line of the fixing portion. It is the structure characterized by these. According to such a configuration, there is an advantage that two braces can be easily applied to the suspension bolt at about 90 degrees in plan view.

  According to a third aspect of the present invention, in the brace coupling fitting according to the first or second aspect, the pair of fixing portions includes spacers at positions corresponding to each other on the inner surface side, and the spacer is tightened with a coupling bolt in the coupling hole. When worn, the pair of fixing portions are held substantially in parallel. According to such a structure, since a pair of fixing | fixed part is hold | maintained substantially parallel by a spacer, the expansion angle of a pair of expansion part can be stabilized at a predetermined angle after construction.

  The invention according to claim 4 is the brace coupling bracket according to any one of claims 1 to 3, wherein the fixing bracket includes a flexible portion at an open end portion of the mounting portion, and the flexible portion is interposed therebetween. The mounting portion and the fixing portion are connected to each other. According to such a configuration, when the fixing bracket is attached to the suspension bolt, the workability is further improved.

  The invention according to claim 5 is the brace fitting according to claim 4, wherein the flexible part is a hole or a groove formed in a direction parallel to the axial direction of the suspension bolt. It is.

  The invention according to claim 6 is a brace construction method for connecting the brace by attaching the brace connecting metal fitting according to any one of claims 1 to 5 to a suspension bolt, wherein the pair of fixing portions of the brace connecting metal In the expanded state, the mounting portion is brought into contact with the peripheral side surface of the suspension bolt, and the distance between the pair of fixed portions is reduced by pressing the tip portions of the pair of expanded portions toward each other. Reducing the diameter of the mounting portion and temporarily fixing the mounting bolt to the suspension bolt; fixing the brace coupling bracket to the suspension bolt by fastening the connection bolt to the connection hole in the temporarily fixed state; and Adjusting the angle of the pair of angle members held by the support bolts inserted through the through holes of the pair of expanded portions according to the mounting angle of the brace, A construction which is characterized in that and a step of attaching the braces to each pair of angle members. Such a brace construction method is excellent in workability as compared with the conventional method, and the construction can be completed in a short time.

  According to the present invention, it is possible to easily attach a brace having seismic control strength required in recent years to a suspension bolt, and work efficiency is improved as compared with the conventional art.

It is a perspective view which shows one construction example of a brace coupling metal fitting. It is a disassembled perspective view of a brace coupling metal fitting. It is a top view which expands and shows the fixing bracket before attaching a brace coupling bracket to a suspension bolt. It is process drawing at the time of attaching a fixing metal fitting to a suspension bolt. It is a figure which shows the additional structural example with respect to a fixing metal fitting. It is a figure which shows the state before connecting a brace between two suspension bolts. It is a figure which shows the state which connected the brace between two suspension bolts. It is a top view which shows the state which the brace connection metal fitting connected two braces to one suspension bolt.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each drawing referred to below, the same code | symbol is attached | subjected to the mutually common member, and the overlapping description about them is abbreviate | omitted.

  FIG. 1 is a perspective view showing an example of construction of a brace fitting 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the brace coupling fitting 1. The brace connecting bracket 1 is a bracket that is attached to the outer peripheral surface of the suspension bolt 10 and connects the suspension bolt 10 and the brace 11, the fixing bracket 2 that is clamped and fixed to the outer peripheral surface of the suspension bolt 10, And a pair of angle members 3 that hold a pair of braces 11 that are held at the distal end of the fixture 2 and arranged in different directions. Each of the fixing bracket 2 and the angle member 3 is formed of a metal such as steel or stainless steel. FIG. 2 shows a form before the brace coupling 1 is attached to the suspension bolt 10. FIG. 3 is an enlarged plan view showing the fixing bracket 2 before the brace coupling bracket 1 is attached to the suspension bolt 10.

  The fixing bracket 2 has a substantially C-shaped mounting portion 21 in plan view that is mounted along the outer peripheral surface of the suspension bolt 10, and a connection through which the connection bolt 14 can be inserted by extending a pair of open tip portions of the mounting portion 21. It has a pair of fixing | fixed part 22 in which the hole 28 was formed, and a pair of expansion part 23 provided by extending the front-end | tip part of the pair of fixing | fixed part 22 further in the expansion direction at a predetermined angle. The mounting portion 21 has a predetermined length in the axial direction of the suspension bolt 10 and is mounted on the suspension bolt 10 so as to be in close contact with a predetermined range in the circumferential direction of the suspension bolt 10. Engagement portions 27 are formed on the upper and lower portions of the mounting portion 21 so as to protrude inward so as to engage with male screws formed on the suspension bolt 10. As shown in FIGS. 2 and 3, the two open ends of the C-shaped portion of the mounting portion 21 are extended so as to expand in a substantially V shape before mounting to the suspension bolt 10. It is connected to the fixed part 22. And the front-end | tip part of this pair of fixing | fixed part 22 is connected with a pair of expansion part 23 extended so that it might expand further in a substantially V shape in the state bent by predetermined angle. The angle θ at which the pair of expanded portions 23 bend from the distal end portion of the fixed portion 22 is arbitrary, but in the present embodiment, for example, as shown in FIG. A pair of expanding portions 23 that are bent outward and further expand with respect to the tip portion of the fixing portion 22 are configured. The fixing bracket 2 of the present embodiment is mounted by, for example, using a long metal plate having a predetermined width as a base material and performing uniform bending processing on both sides in the long direction with reference to the center of the metal plate. The part 21, the pair of fixing parts 22, and the pair of spread parts 23 are integrally formed.

  The pair of fixing portions 22 are formed with connecting holes 28 through which the connecting bolts 14 can be inserted at positions opposite to each other at the center. By fastening with the connecting nut 15 in a state where the connecting bolt 14 is inserted into the connecting hole 28, the pair of fixing portions 22 have their expanding angles reduced, thereby reducing the substantially C-shaped mounting portion 21. It can be tightened in the radial direction. That is, the open end portion of the substantially C-shaped mounting portion 21 and the portion connected to the pair of fixing portions 22 is configured as a flexible portion 26 that can reduce and deform the expansion angle of the fixing portion 22. The mounting portion 21 and the fixing portion 22 are connected to each other through the flexible portion 26. In addition, spacers 24 are provided inside the metal plates constituting the pair of fixing portions 22 at positions facing each other. The spacer 24 may be formed by bending a metal plate serving as a base material, or may be formed by welding another spacer member to the metal plate. In such a spacer 24, when the pair of fixing portions 22 are fastened by the connecting bolt 14 and the connecting nut 15, the pair of fixing portions 22 whose expansion angles are reduced are substantially parallel to each other with a predetermined interval. It is held so as to be in a state.

  The pair of expanded portions 23 are extended from the distal end portion of the fixed portion 22 by a predetermined length in the expanding direction, and a through hole 29 into which the support bolt 16 can be inserted is formed at a position near the distal end portion. The support bolt 16 inserted through the through hole 29 holds the angle member 3 obtained by bending the metal plate in a substantially L shape so that the angle of the angle member 3 can be adjusted around the axis. Further, the distal end portion 23 a of the expanding portion 23 is configured to be bent approximately 90 degrees in the direction in which the support bolt 16 is inserted and to be engaged with the bolt head portion 16 a of the support bolt 16.

  For example, the angle member 3 is formed by using a long metal plate having circular through holes 33 and 34 at both ends as a base material, and bending the metal plate at a predetermined position at approximately 90 degrees to thereby form a long arm. A portion 31 and an attachment portion 32 having a predetermined length for attaching the brace 11 are formed. The support bolt 16 is inserted into the through hole 33 provided at the end of the arm portion 31, and the nut 17 is loosely attached to the support bolt 16, so that the angle member 3 can rotate around the axis of the support bolt 16. Retained. Then, the angle member 3 is fixed to the expanded portion 23 by the nut 17 being fastened and fixed to the support bolt 16. The brace 11 is inserted into the through hole 34 of the attachment portion 32, and the fixing nuts 18 and 19 are fastened to both sides of the attachment portion 32, so that the brace 11 is attached to the angle member 3. When adjusting the arrangement angle of the brace 11, the angle member 3 is arbitrarily displaced according to the arrangement angle of the brace 11 by loosening the nut 17 of the support bolt 16 that holds the angle member 3. Become. When the fixing nuts 18 and 19 are loosened, the mounting position of the brace 11 with respect to the mounting portion 32 can be adjusted.

  When the brace 11 is connected to the suspension bolt 10 using such a brace connection bracket 1, the fixing bracket 2 is first attached to the suspension bolt 10. FIG. 4 is a process diagram when attaching the fixing bracket 2 to the suspension bolt 10. In addition, illustration of the angle member 3 is abbreviate | omitted in FIG.

  First, as shown in FIG. 4A, with the pair of fixing portions 22 of the fixing bracket 2 being expanded, the inside of the mounting portion 21 is directed toward the suspension bolt 10 and the mounting portion 21 is hung as indicated by an arrow F1. Attached to the outer peripheral side surface of the bolt 10. When the mounting portion 21 is mounted on the outer peripheral side surface of the suspension bolt 10, the state shown in FIG. At this time, since the engaging portion 27 engages with the male screw of the suspension bolt 10, it is possible to prevent the displacement of the mounting portion 21 in the axial direction. Then, as shown by the arrow F2, by pressing and pressing both ends of the pair of expanded portions 23 with both hands, for example, the expansion angle of the pair of fixed portions 22 is reduced and deformed, and the mounting portion 21 is reduced in the diameter reducing direction. Tighten and temporarily fasten to the suspension bolt 10. That is, since the fixing bracket 2 of the present embodiment further extends the distal end portion of the fixing portion 22 to form a pair of expanded portions 23, the both ends of the pair of expanded portions 23 are pressed using force points. Thus, even when the force is relatively small, the flexible portion 26 at the point of action can be flexibly deformed to reduce the distance (expansion angle) between the pair of fixing portions 22.

  However, in order to make the flexible portion 26 more flexible and deformable, for example, a configuration as shown in FIG. 5 may be adopted. 5A has a configuration in which holes 26a are formed in the flexible portion 26 in a direction parallel to the axial direction of the suspension bolt 10. 5A illustrates the case where the hole 26a is a slit-like long hole, the present invention is not limited to this, and a plurality of small holes are formed along the axial direction of the suspension bolt 10. It does not matter. 5B has a configuration in which a groove 26b is formed in the flexible portion 26 in a direction parallel to the axial direction of the suspension bolt 10. As shown in FIG. 5B illustrates the case where one groove 26b is formed, the present invention is not limited to this, and a plurality of grooves 26b may be formed. By forming the hole 26a or the groove 26b as described above in the flexible portion 26, the flexible portion 26 is relatively flexibly deformed even if the force pressing both ends of the pair of expanded portions 23 is reduced. Will be able to.

  In addition, the fixing bracket 2 of FIG. 5B has a circumferential direction of the mounting portion 21 that is curved in a substantially C-shape so that the mounting portion 21 can be easily reduced in diameter as the flexible portion 26 is flexibly deformed. The long hole 21a is formed along the line. By forming the long hole 21 a in the mounting portion 21, the mounting portion 21 is easily deformed to reduce its diameter as the flexible portion 26 is deformed. Therefore, when both ends of the pair of expanded portions 23 are pressed and the mounting portion 21 is temporarily fixed to the suspension bolt 10, even if a small pressing force can be easily fixed, work efficiency is further improved. To do. FIG. 5B illustrates the case where the long holes 21 a are formed along the circumferential direction of the mounting portion 21. However, the present invention is not limited to this. For example, a plurality of small holes are provided in the circumferential direction of the mounting portion 21. It may be formed along.

  Further, the fixing bracket 2 of FIG. 5B has a protruding portion 24 a in which an end portion on the mounting portion 21 side of the spacer 24 protruding inward from the pair of fixing portions 22 protrudes toward the mounting portion 21. Yes. The protrusions 24 a are engaged with the outer peripheral side surface of the suspension bolt 10 as the pair of fixing portions 22 are deformed to reduce the expansion angle. Therefore, when the mounting portion 21 is temporarily fastened to the suspension bolt 10, it is possible to satisfactorily prevent the fixture 2 from being lowered along the suspension bolt 10.

  In addition, you may provide the long hole 21a and projection part 24a which are shown in FIG.5 (b) in the fixing metal fitting 2 of Fig.5 (a). Moreover, you may provide in the fixing metal fitting 2 shown in FIG.1 and FIG.2.

  Returning to FIG. 4, when the mounting portion 21 is temporarily fastened to the suspension bolt 10, the state shown in FIG. Then, the connecting bolt 14 is inserted into the connecting hole 28 formed in the fixing portion 22 of the fixing bracket 2 temporarily fixed to the suspension bolt 10, and the connecting nut 15 is fastened and fixed to the connecting bolt 14. As a result, the fixture 2 is fixed in a state where the suspension bolt 10 is sandwiched as shown in FIG. At this time, since the spacer 24 holds the pair of fixing portions 22 in a substantially parallel state, the opening angle of the pair of expanding portions 23 extending from the tip of the fixing portion 22 is approximately 90 degrees. This expansion angle is a connection angle for connecting the brace 11 to the suspension bolt 10 in a plane orthogonal to the suspension bolt 10. Therefore, in the present embodiment, the two braces 11 can be connected at a substantially right angle in a plane orthogonal to the suspension bolt 10.

  When the fixing bracket 2 is attached to the suspension bolt 10 as described above, the brace 11 is then fixed to the fixing bracket 2. 6 and 7 are process diagrams when the brace 11 is fixed. FIG. 6 shows a state before the brace 11 is fixed, and FIG. 7 shows a state where the brace 11 is fixed. As shown in FIGS. 6 and 7, for example, the shelf board 8 is supported substantially horizontally at the lower ends of a plurality of suspension bolts 10 depending from the ceiling slab 7, and the ceiling structure 9 is attached to the shelf board 8. . The fixing bracket 2 according to the present embodiment is attached to two upper and lower portions of the suspension bolt 10. As shown in FIG. 6, an angle member 3 is swingably attached to the fixture 2 attached to the upper part of the suspension bolt 10, and a brace 11 is connected to the angle member 3 in advance. Therefore, when the fixing bracket 2 is attached to the upper portion of the suspension bolt 10, the brace 11 is suspended from the tip of the fixing bracket 2. On the other hand, as shown in FIG. 6, the angle member 3 is not attached in advance to the fixing bracket 2 attached to the lower portion of the suspension bolt 10, and the lower end of the brace 11 that hangs down from the fixing bracket 2 attached to the upper portion of the suspension bolt 10. The angle member 3 is attached to the portion. Then, the brace 11 is disposed in an oblique direction, and the angle member 3 attached to the lower end is fixed to the fixture 2 attached to the lower part of the suspension bolt 10. As a result, as shown in FIG. 7, one brace 11 is hung in an oblique direction between the brace coupling brackets 1a and 1d and between the brace coupling brackets 1b and 1c. Then, by fastening and fixing the nut 17, the angle member 3 is fixed to the fixing bracket 2 at an angle corresponding to the hanging direction of the brace 11. At this time, as shown in FIG. 1, the bolt head 16 a of the support bolt 16 engages with the bent tip portion 23 a of the expanded portion 23, so that the support bolt 16 can be rotated when the nut 17 is fastened. Therefore, the nut 17 can be fastened and fixed efficiently.

  FIG. 8 is a plan view showing a state in which the brace connection fitting 1 connects two braces 11 to one suspension bolt 10. The through hole 34 provided in the attachment portion 32 of the angle member 3 is provided at a position of a predetermined length from the bent position from the arm portion 31, and the fixing nut is inserted in the state where the brace 11 is inserted into the through hole 34. By fastening 18 and 19, the brace coupling fitting 1 can couple the braces 11 to each other so as to be substantially perpendicular to the suspension bolt 10 in a plan view as shown in FIG. 8. That is, the brace 11 connected to the suspension bolt 10 by the brace connection fitting 1 is arranged between the two suspension bolts 10 and is connected in a substantially same plane with the two suspension bolts 10. The damping strength of the suspension bolt 10 can be further increased.

  Thus, according to the construction method using the brace coupling fitting 1 of the present embodiment, it can be constructed in a state where the angle member 3 is attached in advance to the pair of expanded portions 23 provided on the distal end side of the fixing fitting 2. When the fixing bracket 2 is attached to the suspension bolt 10, the angle member 3 does not need to be sandwiched between the pair of fixing portions 22, and the workability is excellent, so that the construction can be performed efficiently. In addition, if one brace connecting bracket 1 is attached to the suspension bolt 10, two braces 11 can be connected to the brace connecting bracket 1, so that in this respect, the workability is excellent and the construction efficiency is improved. Will improve.

  When the two braces 11 are connected to the suspension bolt 10, as shown in FIG. 1, the fixing bracket 2 is suspended with the mounting portion 21 and the pair of fixing portions 22 in a substantially U-shaped state. A pair of widened portions 23 that are widened at approximately 90 degrees from the tips of the pair of fixed portions 22 that are clamped and fixed to the outer peripheral surface of the bolt 10 and that are parallel to each other brace the pair of angle members 3. 11 is held at the same angle as the mounting angle.

  As described above, the brace coupling bracket 1 according to the present embodiment has a pair of open tips extending in the expanding direction at a predetermined angle in the generally U-shaped fixing bracket 2 that is clamped and fixed to the outer peripheral side surface of the suspension bolt 10. A pair of widened portions 23 are provided, and a support bolt 16 is attached to each of the pair of widened portions 23, and the pair of angle members 3 to which the brace 11 can be attached are held by the support bolt 16 so that the angle can be adjusted. It is a configuration. Therefore, if one brace connecting bracket 1 is attached to the suspension bolt 10, two braces 11 can be connected to the brace connecting bracket 1, so that the work efficiency is improved as compared with the case where construction is performed using conventional brackets. To do.

  In addition, the fixing bracket 2 in the brace coupling bracket 1 includes a mounting portion 21 having a substantially C-shape in plan view that is mounted along the outer peripheral surface of the suspension bolt 10, and an open tip portion of the mounting portion 21 that extends the connection bolt 14. A connecting hole 28 that can be inserted is formed, and the connecting bolt 14 is fastened to the connecting hole 28, whereby the mounting portion 21 is clamped and fixed to the suspension bolt 10, and the pair of fixing portions 22. And a pair of expanding portions 23 each having a through hole 29 into which the support bolt 16 can be inserted by further extending the front end portion thereof in the expanding direction at a predetermined angle. Therefore, when the connecting bolt 14 is fastened to the connecting hole 28 provided in the pair of fixing portions 22, there is no need to sandwich a member for attaching the brace 11 between the pair of fixing portions 22. In contrast, the connecting bolt 14 can be fastened efficiently in a short time.

  In the present embodiment, the pair of expanded portions 23 in the fixing bracket 2 are expanded at an angle of approximately 45 degrees with respect to the extension line of the pair of fixed portions 22. Therefore, when the pair of fixing portions 22 are fastened by the connecting bolt 16 so as to be in a substantially parallel state, the pair of expanding portions 23 are in a state of being expanded approximately 90 degrees. Therefore, in this brace connecting bracket 1, for example, four suspension bolts 10 are provided at each vertex of a substantially rectangular shape in plan view in order to suspend and support four points around the ceiling structure 9 such as an air conditioner. This is particularly suitable when the brace 11 is attached to the four suspension bolts 10. However, the expansion angle of the pair of expansion portions 23 is not necessarily limited to that which is approximately 45 degrees with respect to the extension line of the pair of fixing portions 22.

  Further, in the present embodiment, a flexible portion 26 is provided at the open end of the mounting portion 21 in the fixing bracket 2, and the mounting portion 21 and the fixing portion 22 are connected via the flexible portion 26. . Therefore, when temporarily attaching the mounting portion 21 to the suspension bolt 10, the flexible portion 26 can be easily flexibly deformed and temporarily fixed by pressing the tip portions of the pair of expanded portions 23. In this case, it is not necessary to use a special tool, so that workability is excellent.

  In addition, in the above, although one Embodiment of this invention was described, it cannot be overemphasized that this invention is not limited to the thing of the content mentioned above, A various modification is applicable.

DESCRIPTION OF SYMBOLS 1 Brace connection metal fitting 2 Fixing metal fitting 3 Angle member 10 Hanging bolt 11 Brace 21 Mounting part 22 Fixing part 23 Expansion part 24 Spacer 26 Flexible part 28 Connection hole 29 Through-hole

Claims (6)

A brace coupling fitting that is attached to the outer peripheral surface of the suspension bolt and connects the suspension bolt and the brace,
A mounting portion having a substantially C-shape in plan view that is mounted along the outer peripheral surface of the suspension bolt, and a connecting hole through which the connecting bolt can be inserted by extending the open tip of the mounting portion are connected to the connecting hole. When a bolt is fastened, a pair of fixing parts that clamp the fixing part to the suspension bolt and a tip of the pair of fixing parts are further extended in a widening direction at a predetermined angle, and a support bolt is inserted. A fixing bracket having a pair of widened portions formed with possible through holes;
A pair of angle members that can be adjusted at an angle around the axis of the support bolt and can be attached to the brace at an arbitrary angle by the support bolt inserted through the through holes formed in the pair of expanded portions. When,
A brace coupling fitting comprising:   2. The brace coupling bracket according to claim 1, wherein each of the pair of expanded portions in the fixing bracket expands at an angle of about 45 degrees with respect to an extension line of the fixing portion.   The pair of fixing parts includes spacers at positions corresponding to each other on the inner surface side, and the spacers hold the pair of fixing parts substantially parallel when a connecting bolt is fastened to the connecting hole. Item 3. A brace coupling bracket according to item 1 or 2.   4. The fixing bracket includes a flexible portion at an open end of the mounting portion, and the mounting portion and the fixing portion are connected via the flexible portion. The brace coupling metal fitting in any one of.   The brace fitting according to claim 4, wherein the flexible part is a hole or a groove formed in a direction parallel to the axial direction of the suspension bolt. A brace construction method for connecting the brace by attaching the brace coupling metal fitting according to any one of claims 1 to 5 to a suspension bolt,
By bringing the mounting portion into contact with the peripheral side surface of the suspension bolt in a state where the pair of fixing portions of the brace coupling metal are expanded, and pressing the tip portions of the pair of expansion portions in a direction approaching each other. Reducing the distance between the pair of fixed portions, and reducing the diameter of the mounting portion to temporarily fix the suspension bolt;
Fixing the brace coupling bracket to the suspension bolt by fastening a coupling bolt to the coupling hole in the temporarily fixed state;
Adjusting the angle of the pair of angle members held by the support bolts inserted through the through holes of the pair of expanding portions according to the mounting angle of the brace, and for each of the pair of angle members Attaching the brace;
A brace construction method characterized by comprising:

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