JP5476527B2 - Brace mounting device - Google Patents

Description

  The present invention relates to a brace mounting device for mounting a pair of braces inside a rectangular structural frame, such as a bearing wall of a building, in an X-shaped cross arrangement.

  Conventionally, as a load-bearing wall for improving the seismic strength of a building such as a house, for example, as shown in FIG. 10, a vertical frame 11 made of grooved steel or the like and a horizontal frame 12 are formed on the inner side of a structural frame 1 framed in a rectangular shape. A structure having a frame structure in which a pair of braces 13 and 13 made of round steel rods are attached in an X-shaped cross arrangement is widely used. In this frame structure, each brace 13 and the structural frame body 1 are connected to the gusset plate 14 welded and fixed to the corner portion of the structural frame body 1 by using the battledore plates 15 attached to both ends of the brace 13 mainly at the construction site. As shown in the figure, it is usually bolted at one or two locations, or mainly welded at the time of assembly at the factory. However, the gauge line G of the brace 13 is accurately attached to the corner portion c of the structural frame 1 in terms of seismic resistance. It is necessary to adjust to. Further, the tensioning operation of the brace 13 is generally performed by the rotation of the turnbuckle cylinder 16 interposed in the middle. Although the illustrated turnbuckle cylinder 16 is a split frame type, a pipe type is also used.

  As shown in the figure, the end of the brace 13 is usually welded to the end plate 15 (JIS A 5540 architectural turnbuckle) as shown in the figure, but at the entrance of the interrupt groove provided on the end plate. A nut is welded, and the end of the brace is screwed into the nut (Patent Document 1), and a screw cylinder is integrally formed on the front end side of the opening of the battledore, and the end of the brace is screwed into the screw cylinder. Form to be inserted (Patent Document 2), Forming an insertion hole on the front end side of the opening of the battledore, and Forming the nut to be screwed onto the end of the brace protruding through the insertion hole (Patent Documents 3 and 4) Etc. are also proposed.

  On the other hand, the load-bearing wall illustrated in FIG. 10 is for ordinary houses with a width of 1000 mm, but there are standard sizes for ordinary houses with widths of 500 mm, 1500 mm, and 2000 mm. Even in a load bearing wall having the same width, the height is different from, for example, 2750 mm for the first floor and 2700 mm for the second floor. Further, depending on the required characteristics such as the rigidity of the structural frame 1 and the tension of the brace 13, the width of the structural frame 1 as the vertical frame 11 is 30 mm, 40 mm, 45 mm, etc. A groove steel different from 50 mm is used, and a round steel rod having a diameter different from, for example, φ12 to 22 mm is used as the brace 13.

Utility Model Registration No. 3043439 JP 2001-12436 A JP-A-5-79094 JP 2004-244860 A

  As described above, in the bearing wall, it is necessary to accurately match the brace gauge line G with the corner of the structural frame. For example, as shown in FIG. The inclination angle of the gauge line G changes depending on the difference in height between the first floor and the second floor. Moreover, as shown in FIG.9 (b), when the side surface width of the vertical frame 11 of the structure frame 1 is different from w1-w3 also in the same gauge line G, the brace connection position on this gauge line G is p1-p3. Although the connection positions p1 to p3 vary, the height h from the horizontal frame 12 changes even if the distance d from the vertical frame 11 is equal (except when the inclination angle of the gauge line G is 45 °). become. For this reason, in the conventional structure in which the brace is connected to the structural frame via the battledore and the gusset plate, it corresponds to the difference in the inclination angle of the gauge line and the difference in the side width of the vertical frame of the structural frame. Each type of bearing wall requires a gusset plate with a different shape and drilling position, and for the form of screwing the brace plate to the brace end, a different one must be used for each brace diameter. There was a problem that the number of points increased and productivity decreased. In addition, high accuracy is required for the connection between the gusset plate and the wing plate, and the wing plate is operably connected to the gusset plate with the brace end mounted in advance. There was also the difficulty of getting worse.

  On the other hand, when a large shaking occurs due to an earthquake or the like after construction as a bearing wall, as the structural frame is repeatedly deformed into a parallelogram, one brace placed in an X-shaped cross is strained and the other brace Relax. At this time, in the structure in which the brace end is welded to the battledore as shown in FIG. 9 or the brace end is screwed to the nut or screw cylinder fixed to the battledore, both ends of the brace are fixed to the structural frame. For this reason, the bracing on the relaxation side due to deformation often flexes outward and damages the wall surface. In addition, since the inclination angle of both braces fluctuates with the deformation of the structural frame described above, a large bending stress is applied to each connecting portion between the brace end, the battledore and the gusset plate, and damage and distortion of the connecting portion are caused. There is a problem that the durability of the bearing wall itself is lowered, as well as a concern.

  In view of the above-mentioned circumstances, the present invention provides a structural frame as a brace mounting device such as a load bearing wall even if there is a difference in the inclination angle of the gauge line, the side width of the vertical frame of the structural frame, the rod diameter of the brace, etc. Common parts can be used for the connection part of the body and brace, and high productivity with high workability can be obtained with a small number of parts, and it also prevents damage and distortion of the wall surface and the connection part due to earthquakes, etc., and is highly durable It aims to provide what can give.

If the means for achieving the above object is shown with reference numerals in the drawings, the invention of claim 1 has a pair of braces 2A, 2B (hereinafter referred to as round steel rods) on the inner side of the rectangular structural frame 1. in brace attachment device for attaching a a brace 2) may be collectively with X-shaped cross arrangement, at least both end portions 2a of the brace 2, without the 2a screw shaft, each end of both braces 2,2 Corresponding to the portion 2a, mounting brackets 3A and 3B (hereinafter collectively referred to as mounting bracket 3), nuts 4 and washers 5 fixed to the vertical frame 11 of the structural frame 1 are provided. A brace insertion portion 3a through which the end 2a of the brace is inserted, and the insertion hole 30 of the brace insertion portion 3a has a diameter larger than the rod diameter of the brace and extends from the outlet 30a side to the inlet 30b side in the direction of the structural frame main surface. Expanding hole The brace 2 is tightened to the structural frame 1 by screwing and tightening the nut 4 to the end 2a of the brace 2 inserted through the brace insertion part 3a of the mounting bracket 3 through the washer 5. A brace mounting device configured to be fixed in a state where a concave curved surface forms a concave arc around the insertion hole outlet 30a in the brace insertion portion 3a of the mounting bracket 3 along the structural frame main surface direction. A (concave spherical surface 31) is formed, and the surface of the washer 5 facing the brace insertion portion 3a forms a convex curved surface (convex spherical surface 51) corresponding to the concave curved surface 31, and the concave curved surface 31 of the brace insertion portion 3a. A key groove 32 is formed along the main surface direction of the structural frame body, and engaging keys 52, 52 are slidably inserted into the convex curved surface 51 of the washer 5 in the key groove 32. Yes.

According to a second aspect of the present invention, in the brace mounting device according to the first aspect , the insertion hole 50 of the washer 5 is set to a hole position and a hole diameter corresponding to the crossing interval and the rod diameter of the pair of braces 2A and 2B. It is said.

According to a third aspect of the present invention, in the brace mounting apparatus according to the first or second aspect, the square shaft portion 21 is formed on a part of the round steel rod of the brace 2.

According to a fourth aspect of the present invention, in the brace mounting device according to any one of the first to third aspects, the mounting bracket 3 is integrally formed with a surrounding frame portion 3b on the inner back side of the brace insertion portion 3a, and the brace insertion portion 3a. The end 2a of the brace 2 into which the nut 4 and the washer 5 are inserted is inserted into the enclosure frame portion 3b.

According to a fifth aspect of the present invention, in the brace mounting device according to the fourth aspect , the surrounding frame portion 3b of the mounting bracket 3 constitutes a pair of vertical leg pieces 33, 33 facing each other in the structural frame thickness direction, and both vertical The leg pieces 33, 33 are formed with open windows 34 that are transparent in the thickness direction of the structural frame.

According to the sixth aspect of the present invention, in the brace mounting apparatus according to the fifth aspect , a welding groove 35 is formed at a side edge of the vertical leg piece portions 33, 33 facing the vertical frame 11 of the structural frame body 1. It is supposed to be.

The invention of claim 7 is the brace mounting device according to any one of claims 1 to 6 , wherein the vertical frame 11 of the structural frame 1 is made of grooved steel with the open side facing the inside of the frame. It is assumed that the mounting bracket 3 is welded to the top of both side walls 11a and 11a.

  Next, effects of the present invention will be described with reference numerals in the drawings. First, according to the brace mounting apparatus according to the first aspect of the present invention, when the bearing wall is constructed, the mounting bracket 3 corresponding to the end 2a of each brace 2 is fixed to the vertical frame 11 of the rectangular structural frame 1. The brace insertion portion 3a of the mounting bracket 3 is inserted with the end portion 2a forming the screw shaft of each brace 2, and the nut 4 is screwed and tightened to the inserted end portion 2a via the washer 5, whereby the brace 2 can be attached to the structural frame 1 in a tensioned state. At this time, the insertion hole 30 of the brace insertion part 3a in the mounting bracket 3 has a hole diameter larger than the rod diameter of the brace 2, and has a hole shape that extends from the outlet 30a side to the inlet 30b side in the structural frame main surface direction. Even if the gauge line G of the brace 2 is different to some extent, the same mounting bracket 3 can be shared by adjusting the fixing position up and down, and the same mounting can be performed on the brace 2 having a different rod diameter by simply replacing the nut with a suitable screw diameter. Since the metal fitting 3 can be shared, the material cost is greatly reduced by sharing the parts, and the brace 2 can be attached in a tension state by simply screwing and tightening the nut 4, so that it is extremely easy to operate. The characteristics are greatly improved.

  Further, even if a large shaking due to an earthquake or the like occurs after construction as a load bearing wall and the structural frame 1 is repeatedly deformed into a parallelogram shape, both ends 2a and 2a of the brace 2 on the relaxation side accompanying this deformation are attached to the mounting bracket. 3 can be moved in the insertion direction with respect to the brace insertion portion 3a, so that there is no fear that the brace 2 on the relaxation side bends outward and damages the wall surface, and both braces are accompanied by the deformation of the structural frame 1. Even if the inclination angle of 2 or 2 varies, the insertion hole 30 of the mounting bracket 3 has a hole shape that expands toward the inlet 30b, and the inclination angle variation is accommodated in the insertion hole 30, so that the end 2a of the brace 2 and There is no concern that a large bending stress is applied to the connecting portion with the mounting bracket 3 to cause damage or distortion, and thus excellent durability as a bearing wall can be obtained.

Furthermore , according to the present invention , since the washer 5 is in sliding contact with the concave curved surface (concave spherical surface 31) of the brace insertion portion 3a of the mounting bracket 3 by the corresponding convex curved surface (convex spherical surface) 51, each brace 2 is attached to the structural frame 1. Is attached to the end portion of the brace 2 inserted through the brace insertion portion 3a of the mounting bracket 3, and the nuts 4 are screwed and tightened so that the washers 5 and 5 at both ends of the brace 2 are mutually connected. Displacement is made to make the distance the shortest, and the gauge line G naturally matches the corner c of the structural frame 1, so that the mounting operation becomes easier. Further, the insertion hole 30 of the mounting bracket 3 has a hole shape that expands in the direction of the main surface of the structural frame from the outlet 30a side to the inlet 30b side, and the washer 5 is slid in contact with the mounting bracket 3 on the uneven curved surface. Since it can be displaced dynamically, the same mounting bracket 3 can be shared without any trouble even if there is a certain difference in the inclination angle of the gauge line G of the brace 2. Furthermore, when the inclination angle of both braces 2 and 2 is about to fluctuate with the repeated deformation of the structural frame 1 due to an earthquake or the like, the washer 5 slides along the direction of the main surface of the structural frame. Thus, since the change in the inclination angle is not hindered, it is possible to avoid the bending stress due to the change in the inclination angle from being applied to the mounting bracket 3, thereby further improving the durability of the mounting bracket 3 and the load bearing wall.

Furthermore , according to the present invention , the key groove 32 is formed on the concave curved surface 31 of the brace insertion portion 3a of the mounting bracket 3 along the main surface direction of the structural frame, and the key groove 32 projects from the convex curved surface 51 of the washer 5. Since the engaged keys 52 and 52 are fitted, the washer 5 does not rotate when the nut 4 is tightened. Further, since the sliding direction of the washer 5 with respect to the mounting bracket 3 is restricted to the main surface direction of the structural frame body by the key engagement, the inclination of the braces 2 and 2 with the repeated deformation of the structural frame body 1 due to an earthquake or the like. When the angle is about to fluctuate, the vibrations of both braces 2 and 2 are also regulated in the direction of the main surface of the structural frame body, so that the inclination angle fluctuation is made smoother and the load applied to the structural frame body 1 and the mounting bracket 3 is reduced. To do.

According to the invention of claim 2, the brace 2 is positioned with respect to the structural frame body 1 by the insertion hole 50 of the washer because the fitting 3 and the washer 5 are key-engaged. 50 is set to a hole position and a hole diameter corresponding to the crossing interval and rod diameter of the pair of braces 2A and 2B, so that the same mounting bracket 3 is shared by the braces 2A and 2B having different crossing intervals and rod diameters. Thus, both braces 2A and 2B can be attached to the structural frame 1 with an appropriate arrangement by replacing only the washer 5 with one that fits the insertion hole 50.

According to the invention of claim 3 , since the square shaft portion 22 is formed on a part of the round steel rod of the brace 2, the nut is obtained by holding the square shaft portion 22 and stopping the rotation on the brace 2 side. On the other hand, if both ends 2a, 2a of the brace 2 are reverse screws, the brace 2 side using the angular shaft portion 22 can be screwed with the nuts 4, 4 at both ends. Tightening can be performed at the same time. Further, since the turnbuckle body having a large turning diameter can be omitted, even the brace 2 having a large rod diameter can be disposed within the thickness of the structural frame.

According to the invention of claim 4 , the mounting bracket 3 is provided with the surrounding frame portion 3b on the inner back side of the brace insertion portion 3a, and the end portion 2a of the brace 2 to which the nut 4 and the washer 5 are fitted is the surrounding frame portion. Since the frame 3b is arranged in the space 3b, the enclosure frame 3b allows the movement of the end 2a of the brace 2 in the insertion direction and the vibration due to the fluctuation of the inclination angle of the brace 2 due to shaking such as an earthquake. Is secured.

According to the invention of claim 5 , the surrounding frame portion 3 b of the mounting bracket 3 constitutes a pair of vertical leg pieces 33, 33 facing each other in the thickness direction of the structural frame, and the structural frame is formed on both vertical leg pieces 33, 33. Since the open window 34 that penetrates in the body thickness direction is provided, the twisting operation of the nut 4 can be performed through the open window 34 with a ratchet wrench or the like, and the weight and material are reduced by the amount of the open window 34.

According to the sixth aspect of the present invention, since the groove 35 for welding is formed at the side edges of the vertical leg pieces 33, 33 in the surrounding frame portion 3 b of the mounting bracket 3, The mounting bracket 3 can be securely and securely welded to the frame 11 at the side edges of both the vertical leg pieces 33 and 33.

According to the invention of claim 7 , the vertical frame 11 of the structural frame body 1 is made of grooved steel with the open side facing the frame body inside, and the mounting bracket 3 is attached to the tops of both side walls 11a and 11a of the grooved steel. Since the welding is performed in such a manner that the mounting frame 3 is welded, the vertical frame 11 made of channel steel of the structural frame 1 is reinforced, and in particular, the bending strength of the vertical frame 11 is improved.

It is a front view of the brace attachment device concerning one embodiment of the present invention. It is a vertical side view which shows the attachment state of the brace lower end part in the brace attachment apparatus. It is a perspective view which shows the attachment metal fitting used for the brace attachment apparatus, an accessory, and a brace end part in a separated state. The mounting bracket is shown, wherein (a) is a plan view, (b) is a sectional view taken along line BB in (a), (c) is a bottom view, and (d) is a left side view. The washer of the accessory of the attachment metal fitting is shown, (a) is a top view, (b) is a front view, (c) is a longitudinal side view of a CC line of (a). It is a cross-sectional arrow view in the AA line of FIG. It is a top view which shows the change of the insertion hole of a washer by the difference in the rod diameter of a brace. The position change of the attachment metal fitting by the inclination angle of the gauge line in the brace attachment device is shown, (a) is a vertical side view showing the attachment state at the inclination angle θ1 and (b) at the inclination angle θ2. (A) is a schematic diagram showing the change in the inclination angle of the gauge line of the brace due to the difference in the height of the structural frame, and (b) is the change in the connection position of the brace end due to the difference in the side width of the vertical frame in the structural frame. It is a schematic diagram which shows. It is a front view of the conventional common brace attachment apparatus.

  Hereinafter, a brace mounting device according to an embodiment of the present invention will be specifically described with reference to the drawings. In the present embodiment, the same reference numerals are given to common portions with the conventional configuration illustrated in FIG.

  The bearing wall shown in FIG. 1 has a pair of braces 2A and 2B (generally called braces 2) made of round steel rods inside a structural frame 1 in which a vertical frame 11 and a horizontal frame 12 are rectangularly framed. Both ends 2a and 2a are attached to the structural frame body 1 via attachment fittings 3A or 3B (generally referred to as attachment fittings 3), thereby being attached in an X-shaped cross arrangement. The vertical frame 11 and the horizontal frame 12 of the structural frame 1 are made of grooved steel with the open side facing the inside of the frame, and are connected to each other by welding.

  As shown in FIGS. 2 and 3, each brace 2 has both ends 2 a and 2 a forming a screw shaft, and each end 2 a is inserted into the brace insertion portion 3 a of the mounting bracket 3, and the inserted end The nut 2 is screwed and tightened to the portion 2a via a washer 5, so that the portion 2a is attached to the mounting bracket 3 in a tensioned state. Further, as shown in FIGS. 1 and 2, a square shaft portion 21 having a hexagonal cross section is formed on the lower side of each brace.

  As shown in detail in FIGS. 2 to 4, the mounting bracket 3 extends from the rectangular frame portion 3c, a block-like brace insertion portion 3a integrated at one corner of the rectangular frame portion 3c, and the rectangular frame portion 3c. The frame frame 33b is composed of a pair of left and right vertical leg pieces 33 and 33, and is formed into a bifurcated shape with a substantially rectangular shape in plan view. The brace insertion portion 3a has an insertion hole 30 penetrating vertically. Yes. Thus, such a mounting bracket 3 is set such that the left and right width is substantially equal to the thickness of the structural frame 1, but the brace insertion portion 3a corresponds to each brace arranged in the cross direction in the left-right direction of the rectangular frame portion 3c. There are two forms that are arranged on one side and the other side (in the structural frame thickness direction). That is, the brace insertion part 3a of the mounting bracket 3A corresponding to one brace 2A arranged on the front side in the front view of FIG. 1 is on the front side (left side) and corresponds to the other brace 2B arranged on the back side. The brace insertion part 3a of the mounting bracket 3B is on the back side (right side). Since both the mounting brackets 3A and 3B have the same configuration except that the brace insertion portion 3a has a left-right reverse, the mounting bracket 3A is shown as a representative in FIGS.

  The insertion hole 30 of the brace insertion portion 3a is inclined with the center line corresponding to the gauge line G of the brace 2, and has a larger diameter than the rod diameter of the brace 2 as a whole, and from the outlet 30a side to the inlet 30b side. It is set to a hole shape that expands in the front-rear direction (structural frame main surface direction), so that the inlet 30b has a long hole shape, and the outlet 30a has a slightly long hole shape in the same direction. Further, the periphery of the outlet 30a of the insertion hole 30 in the brace insertion portion 3a forms a concave spherical surface 31 having the peripheral edge of the insertion hole 30 as the lowest position, and the concave spherical surface 31 has a diameter along the main direction of the structural frame body. A direction keyway 32 is formed.

  The pair of left and right vertical leg pieces 33, 33 constituting the enclosure frame portion 3b has a front edge inclined along the center direction of the insertion hole 30 of the brace insertion portion 3a and a rear edge at the corner of the rectangular frame portion 3c. An open window 34 that is vertically continuous from the portion and penetrates in the left-right direction (structure frame thickness direction) is formed in the center portion. Further, as shown in FIGS. 4C and 4D, welding grooves 35 are formed on the rear edge outer side and the lower edge outer side of both vertical leg pieces 33 and 33, respectively.

  The nut 4 used for mounting the brace 2 to the mounting bracket 3 is a normal hexagonal nut. However, the washer 5 interposed between the mounting bracket 3 and the nut 4 is not a simple annular flat plate, but is shown in FIGS. 5 is adopted. That is, the washer 5 has a convex spherical surface 51 corresponding to the concave spherical surface 31 around the insertion hole 30 on the upper surface side facing the insertion hole 30 of the mounting bracket 3, and corresponds to the key groove 32 of the mounting bracket 3. On the convex spherical surface 51, strip-like engagement keys 52, 52 are provided along the radial direction of the center hole 50. The insertion hole 50 of the washer 5 is a perfect circle on the side of the insertion hole 30 of the mounting bracket 3, but the inlet 50 b side facing the convex spherical surface 51 is slightly longer in the direction in which the engagement keys 52 and 52 are arranged. It becomes an ellipse, and has a shape that expands from the outlet 50a side to the inlet 50b side accordingly.

  In the brace mounting apparatus having the above configuration, when constructing a bearing wall or the like, first, the mounting bracket 3 corresponding to the end 2a of each brace 2 is fixed to the vertical position of each vertical frame 11 of the structural frame 1 by welding. deep. That is, as shown in FIG. 6, the mounting bracket 3 has both vertical ends of the surrounding frame portion 3 b at both top ends bent inside the side walls 11 b and 11 b of the vertical frame 11 made of channel steel of the structural frame body 1. By welding the rear edges of the leg pieces 33, 33 using the groove 35, the leg pieces 33, 33 are fixed so as to cross over the open side of the vertical frame 11. The fixing position of the mounting bracket 3 is set so that the gauge line G of the brace 2 to be connected passes through the center of the insertion hole 30 and matches the corner c of the structural frame 1. In addition, as shown by the phantom line in FIG. 6, the adjacent load-bearing wall frames abut each other's vertical frames 11, 11, and through bolts 6 at a plurality of upper and lower positions between the joined base wall portions 11 a, 11 a. And the nut 7 to be screwed and fixed.

  Thus, the end portion 2a of the brace 2 is inserted into the brace insertion portion 3a of the mounting bracket 3 fixed to the vertical frame 11 of the structural frame body 1, and the nut 4 is screwed into the inserted end portion 2a via the washer 5. By simply tightening, the brace 2 can be attached to the structural frame 1 in a tensioned state. At this time, the washer 5 has its convex spherical surface 51 joined to the concave spherical surface 31 of the mounting bracket 3, but the engagement keys 32, 32 are fitted into the key groove 32 on the mounting bracket 3 side, so Does not occur. As for the tightening operation of the nut 4, an appropriate twist such as a ratchet wrench is made from the open window 34 to the inside of the surrounding frame portion 3 b of the mounting bracket 3 while the brace 2 is gripped by the square shaft portion 22 and stopped. In addition to the method of inserting a tool and twisting the nut 4 with the twisting tool, both ends 2a, 2a of the brace 2 are formed as reverse screws, and the brace 2 side is rotated using the angular shaft 22 A method of simultaneously screwing and tightening with nuts 4 and 4 at both ends can also be adopted.

  In the tightening operation of the nut 4, the brace 2 to be connected is arranged because the washer 5 is slidably contacted with the convex spherical surface 51 of the brace insertion portion 3 a of the mounting bracket 3 by the corresponding convex spherical surface 51. Even if the angle is slightly deviated from the original gauge line G, in the process of tightening the nut 4, the washers 5 and 5 at both ends of the brace 2 are displaced by the tightening force so as to minimize the mutual distance. The line G naturally fits the corner c of the structural frame 1, and the mounting operation is facilitated accordingly.

  According to such a brace mounting device, even if a large shake due to an earthquake or the like occurs as a load bearing wall or the like after construction, and the structural frame 1 is repeatedly deformed into a parallelogram shape, the brace 2 on the relaxation side accompanying this deformation is Since both end portions 2a, 2a move in the insertion direction as shown by the arrow y in FIG. 2 with respect to the brace insertion portion 3a of the mounting bracket 3, the straight brace 2 is maintained without being bent. There is no concern of bending and damaging the wall. Moreover, even if the inclination angle of both braces 2, 2 fluctuates as shown by the arrow x in FIG. 2 with the deformation of the structural frame 1, the insertion hole 30 of the mounting bracket 3 has a hole shape that expands toward the inlet 30b. In addition, the inclination angle variation is accommodated in the insertion hole 30, and the washer 5 slides along the structural frame main surface direction by key engagement following the variation in the inclination angle of both braces 2, 2. Since the deflection of the end portions 2a of the braces 2, 2 is also regulated in the direction of the main surface of the structural frame body, the fluctuation of the inclination angle is not hindered and can be stably and smoothly performed. It is possible to avoid applying a large bending stress due to the inclination angle variation to the vertical frame 11 of the body 1 and to prevent damage and distortion due to the bending stress. Accordingly, excellent durability can be obtained as the mounting bracket 3 and the load bearing wall.

  Note that the end 2a of the brace 2 to which the nut 4 and the washer 5 are fitted moves when the brace 2 moves in the insertion direction due to the shaking of the earthquake or the like, or swings due to fluctuations in the inclination angle of the brace 2. Since the space is secured by the surrounding frame portion 3b of the mounting bracket 3, there is no concern that the movement is hindered by interference with others. Since the mounting bracket 3 itself has the enclosure frame portion 3, the strength and rigidity are improved, and the vertical leg piece portions 33, 33 constituting the enclosure frame portion 3 b have open windows 34. In addition to being able to perform the twisting operation of the nut 4 with a wrench or the like without any trouble, there is an advantage that weight and material are reduced by the amount of the open window 34.

  On the other hand, in such a brace mounting device, the insertion hole 30 of the brace insertion part 3a in the mounting bracket 3 has a larger hole diameter than the rod diameter of the brace 2, and from the outlet 30a side to the inlet 30b side in the structural frame main surface direction. Since it has an expanding hole shape, the gauge line G of the brace 2 differs to some extent due to the difference in height between the first floor and the second floor of the structural frame 1 described above, or the structural frame 1 with the same gauge line G Even when the side widths of the vertical frames 11 are different, the same mounting bracket 3 can be shared by vertically adjusting the fixing position. For example, as shown in FIG. 8A, when the mounting position of the mounting bracket 3 is matched with the height h1 from the horizontal frame 12 in the gauge line G1 having an inclination angle θ1 with respect to the vertical direction as shown in FIG. When the gauge line G2 has a slightly large inclination angle θ2, the mounting position is lowered to the height h2 from the horizontal frame 12 as shown by the solid line in FIG. Can be adapted. In addition, the vertical frame 11 of the structural frame 1 has a side width w1 indicated by a solid line in FIG. 8B, whereas the vertical frame 11 has the same side width w2 as the virtual line in the same gauge line G2. In the case of a change, it is possible to adapt to the gauge line G2 by using the same mounting bracket 3 and increasing the mounting position to the height h3 from the horizontal frame 12 as shown by the phantom line in FIG.

  In addition, according to this brace mounting device, the insertion hole 30 of the mounting bracket 3 has a hole shape that expands from the outlet 30 a side to the inlet 30 b side in the direction of the structural frame main surface, and the washer 5 is attached to the mounting bracket 3. On the other hand, since it can be slidably displaced in contact with the concave and convex curved surface, even if there is a certain difference in the inclination angle of the gauge line G of the brace 2, it should be within the expansion range on the inlet 30b side in the insertion hole 30 on the mounting bracket 3 side. In this case, the same mounting bracket 3 can be shared without hindrance. Furthermore, in this brace mounting device, the same mounting bracket 3 can be shared for the brace 2 having a different rod diameter simply by replacing the nut 4 with a suitable screw diameter. To do.

  On the other hand, since the position of the washer 5 in the structural frame thickness direction is determined by key engagement with the mounting bracket 3, the brace 2 is also positioned in the structural frame thickness direction by the position of the insertion hole 50. Therefore, as the washer 5, it is necessary to arrange both braces 2A and 2B to be arranged in a non-contact manner, but the crossing interval and rod diameter of both braces 2A and 2B differ depending on the specifications of the bearing wall. As illustrated, the insertion hole 50 is not limited to the one at the center, and the hole position and the hole diameter of the insertion hole 50 may correspond to the crossing interval and the rod diameter. That is, the washer 5 has the same outer shape and outer dimensions corresponding to the same mounting bracket 3, but the hole diameter of the insertion hole 50 differs depending on the rod diameter of the brace 2 to be applied. When the crossing interval between both braces 2 and 2 is made constant as shown in FIG. 7, the inner periphery is one side in the thickness direction of the structural frame (inside when in use) even in the insertion hole 50 having a different hole diameter as shown by the phantom line circle in FIG. It is sufficient to adopt an eccentric configuration so as to be in the same position.

  In the above embodiment, the mounting bracket 3 is welded to the vertical frame 11 of the structural frame 1. However, in the present invention, a method of screwing at a plurality of locations instead of welding can also be adopted. However, if the mounting bracket 3 is welded to the tops of the side walls 11a, 11a of the vertical frame 11 made of channel steel as in the embodiment, the vertical frame 11 is reinforced by the mounting bracket 3. In particular, the bending strength of the vertical frame 11 is improved. Further, when this welding method is adopted, as in the embodiment, the mounting bracket 3 is opened by providing a welding groove 35 at the side edge of both vertical leg pieces 33, 33 in the enclosure frame 3b. It can be securely welded using the tip.

  The mounting bracket 3 used in the present invention has a hole shape in which the insertion hole 30 of the brace insertion portion 3a is larger in diameter than the rod diameter of the brace 2, and extends from the outlet 30a side to the inlet 30b side in the structural frame main surface direction. As described above, even if the gauge line G of the brace 2 is different to some extent (generally up to about 7 ° as an inclination angle), the same one can be shared, but the width of the structural frame 1 is 0.5 times 1 When there is a large difference in the inclination angle of the gauge line G due to the difference between .5 times and 2 times, it is necessary to use the one with the inclination of the center line of the insertion hole 30 of the brace insertion portion 3a corresponding to the difference. Needless to say. However, even with the mounting bracket 3 corresponding to each width of the structural frame 1 to be applied, as described above, the difference in height between the first floor and the second floor, and the difference in side width of the vertical frame 11 of the structural frame 1 Since it can be shared by the difference in the rod diameter of the brace 2, the number of parts is significantly reduced compared to the conventional case.

  In addition, the mounting bracket 3 and the washer 5 can be variously set in size and form of each part other than the examples. In particular, regarding the opposing surfaces, in the embodiment, the mounting bracket 3 side is a concave spherical surface 31 with the peripheral edge of the insertion hole 30 being the lowest position, and the washer 5 side is a convex spherical surface 51 corresponding to the concave spherical surface 31. The washer 5 only needs to be slidable along the structure main surface direction, so that the mounting bracket 3 side has a concave curved surface forming a concave arc along the structure frame main surface direction, and the washer 5 side has the concave shape. Any convex curved surface corresponding to the curved surface 31 may be used. Therefore, for example, a simple concave arc surface may be employed instead of the concave spherical surface 31 on the mounting bracket 3 side, and a simple convex arc surface may be employed instead of the convex spherical surface 51 on the washer 5 side. Further, as the mounting bracket 3, for example, in a large size corresponding to the structural frame 1 having a large width, one or a plurality of reinforcing bars that connect the vertical leg pieces 33 and 33 of the surrounding frame portion 3 b may be provided. .

  On the other hand, as the brace 2, a turnbuckle cylinder may be interposed as in the conventional case, but if the square shaft portion 22 is formed on a part of the round steel rod as in the embodiment, the turnbuckle cylinder having a large turning diameter is omitted. Therefore, even the brace 2 having a large rod diameter can be disposed within the thickness of the structural frame 1, and the width of the design specification as a load bearing wall or the like is increased accordingly. The square shaft portion 22 is not limited to the hexagonal shape illustrated in the cross section, but may be a quadrilateral or other polygonal shape, and the length and the formation position on the brace 2 can be variously set other than illustrated. When both end portions 2a, 2a of the brace 2 are formed as reverse screws, and screwing and tightening with the nuts 4, 4 at both ends are simultaneously performed by rotating the brace 2 side using the angular shaft portion 22, It is necessary to prevent the nuts 4 and 4 from being rotated. As the rotation preventing means, each nut 4 is fixed or engaged with the washer 5 or the surrounding frame portion 3b of the mounting bracket 3 by using an appropriate interposition member. Various methods such as stopping, directly locking each nut 4 to the washer 5 by concave-convex fitting or the like, and further welding each nut 4 to the washer 5 in advance are adopted.

DESCRIPTION OF SYMBOLS 1 Structure frame 11 Vertical frame 11a Side wall part 2,2A, 2B Brace 2a End part 21 Square shaft part 3,3A, 3B Mounting bracket 3a Brace insertion part 3b Enclosure frame part 30 Insertion hole 30a Outlet 30b Inlet 31 Concave spherical surface (concave curved surface)
32 Key groove 33 Vertical leg piece 34 Open window 35 Groove 4 Nut 5 Washer 50 Insertion hole 51 Convex spherical surface (convex curved surface)
52 Engagement key G Gauge line

Claims (7)

Inside the rectangular structure frame, the brace attachment device for attaching a pair of braces made of round steel rod X-shaped cross arrangement,
At least both ends of each brace form a screw shaft, and include a mounting bracket, a nut and a washer that are fixed to the vertical frame of the structural frame corresponding to each end of both braces,
The mounting bracket has a brace insertion portion through which the end of the brace is inserted, and the insertion hole of the brace insertion portion has a hole diameter larger than the rod diameter of the brace and extends from the outlet side to the inlet side in the direction of the structural frame main surface. Has a hole shape,
The brace is configured to be fixed to the structural frame body in a tension state by screwing and tightening a nut to the end of the brace inserted through the brace insertion portion of the mounting bracket via the washer. A brace mounting device ,
A concave curved surface that forms a concave arc along the structure frame main surface direction is formed around the insertion hole outlet in the brace insertion part of the mounting bracket, and the surface of the washer facing the brace insertion part is the concave part. Convex surface corresponding to the curved surface,
A brace formed by forming a key groove along the main surface direction of the structural frame body on the concave curved surface of the brace insertion portion, and having an engagement key that slidably fits in the key groove on the convex curved surface of the washer Mounting device. The brace attachment device according to claim 1, wherein the insertion hole of the washer is set to a hole position and a hole diameter corresponding to a crossing interval and a rod diameter of the pair of braces . The brace attachment device according to claim 1 or 2, wherein a square shaft portion is formed on a part of the round steel rod of the brace. In the mounting bracket, an enclosure frame is integrally formed on the inner side of the brace insertion portion, and an end of the brace that is inserted into the brace insertion portion and fitted with the nut and washer is disposed in the enclosure frame. The brace attachment device according to any one of claims 1 to 3, which is configured as described above . The enclosure frame portion of the mounting bracket constitutes a pair of vertical leg pieces facing each other in the thickness direction of the structural frame, and an open window is formed in each vertical leg piece portion so as to be transparent in the thickness direction of the structural frame body. Item 5. The brace mounting device according to item 4 . The brace attachment device according to claim 5, wherein a groove for welding is formed on a side end edge of the vertical leg pieces facing the vertical frame of the structural frame . The vertical frame of the structural frame is made of channel steel with the open side facing the inside of the frame, and the mounting bracket is welded to the top of both side walls of the channel steel. A brace mounting apparatus according to any one of the above .

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