JP2019143444A - Connection hardware of brace for wooden building - Google Patents

Abstract

To provide a connection hardware of braces for a wooden building which can improve strength of a plate body without increasing its plate thickness, which can secure high strength of a plate body and smoothly transmit stress at a connection position of braces with each other, and which can improve construction workability by saving weight and reducing formation number of fixing holes in braces.SOLUTION: A connection hardware of braces for a wooden building comprises: a metal plate body 6 which is formed at a length dimension straddling first brace 3 and reaching a pair of second braces 4,4, in which a position straddling the first brace becomes first joint region X, and in which positions reaching each of the second braces become a pair of second joint regions Y; protrusions 7a, 7b formed so as to extend across the first joint region and the second joint regions on the plate body along the length direction; and fixing holes 8,9 in which fixtures for fixing the plate body to the braces are provided.SELECTED DRAWING: Figure 6

Description

  The present invention can increase the strength of the plate body without increasing its thickness, and can ensure a high stress at the connection position between the braces to achieve smooth stress transmission. It is possible to improve the workability by reducing the number of fixing holes and to fix the plate body securely and firmly even if there is a construction error in the installation of braces on the frame of an existing wooden building. The present invention relates to a bracing connection hardware for a wooden building that can prevent deformation of the plate body and can surely exert reinforcement performance by bracing.

  When retrofitting, such as seismic reinforcement, to the walls of existing wooden buildings, it may be possible to construct only from the indoor side to maintain the outer walls. For renovation, two braces that form an X-shape are used, but when construction is possible only from one side of a wall or the like, one brace is cut and this cut brace is placed in the same plane as the other brace. In order to intersect in an X shape, at the intersection, the cut braces and the other braces are integrated with each other by, for example, screwing with a flat plate to ensure strength. This type of technology is known as Patent Document 1.

  Patent Literature 1 “Square joints used for high-strength wall strength-giving panels” includes a long brace along one of the diagonals connecting the positions of the four corners of the rectangle, and along the other diagonal and near the diagonal intersection It is used to make an X-shaped brace structure whose side faces are the same with two short struts that hit the long brace material, and is installed across the three brace materials in contact with the flush side face. A metal plate joint for connecting and fixing the X-shaped brace by being fixed to each of the brace by nailing, and this joint is the full width of the side of the short brace on both sides A rectangular main body plate portion extending so as to be in close contact with the main body plate portion, and a bent flange portion that is bent at a right angle from the width edge of the main body plate portion and is in close contact with the thickness direction surface of the short brace. It has a configuration.

Japanese Patent Laid-Open No. 11-6208

  The joint of Patent Document 1 extends over three brace members that form an X-shape, and is in close contact with the entire side width of the short brace on both sides, and the main body plate portion that is fixed to these brace members by nailing is simply flat. Flat plate shape. For this reason, in order to ensure the reliable and firm attachment of the main body plate portion to the brace material, a large number of nail holes must be formed in advance. In addition, a large number of nails must be placed in these nail holes. Therefore, there is a problem that the assembly work efficiency for attaching two short brace members to the long brace member is not good.

  When an external force is applied to the brace material, the short brace material and the long brace material are discontinuous only by contact. For this reason, in the transmission of force, the main body plate portion must bear a large stress. In order to ensure this stress load, the body plate is firmly fixed to the brace by placing a large number of nails at the place where the short brace and the long brace meet. There must be.

  A nail hole for placing a nail for fixing the main body plate portion to the brace is formed in the metal main body plate portion in advance. In addition, before the three brace members are made into an X-shape, both ends of the long brace member and the end of the short brace member on the opposite side to the end part of the long brace member are in contact with each other. These are joined to the four corners of the rectangular corner of the wooden building, that is, the four corners of the pillar / beam frame of the wooden building, and then connected and fixed by joints near the diagonal intersection.

  For this reason, if there is a gap or the angle changes at the location where the short brace and the long brace meet, due to construction errors in the installation of the three braces to the frame, etc. There is a possibility that a predetermined number of nails cannot be driven from the nail holes of the main body plate portion toward the brace material.

  If a predetermined number of nails cannot be driven, the body plate part that bears stress when the external force is applied to the brace is a simple flat plate, so deformation such as buckling is likely to occur. As a result, there is a problem that the predetermined reinforcing performance may not be exhibited. Although it is conceivable to increase the plate thickness of the main body plate portion, there is a problem that the overall weight increases and the workability deteriorates.

  The present invention was devised in view of the above-described conventional problems, and it is possible to increase the strength of the plate body without increasing the thickness thereof, and to ensure a high level at the connecting position between the braces and to ensure smoothness. It is possible to transmit stress, and it is possible to improve the workability by reducing the number of fixing holes for weight reduction and bracing, and there is a construction error in the installation of bracing on the frame of an existing wooden building. However, it is possible to securely and firmly fix the plate body to the brace to prevent deformation of the plate body, and to provide a bracing connection hardware for wooden buildings that can surely exert the reinforcement performance by bracing. Objective.

  The bracing connection hardware for wooden buildings according to the present invention is a pair in which the frame and one end in the length direction are joined to each side edge in the width direction of the first bracing where both ends in the length direction are joined to the frame of the wooden building. This is a bracing fitting for wooden buildings for connecting the other ends of the second braces in the length direction so that the pair of the second braces and the first braces cross in an X shape within the same plane. The first straddle straddle is formed in a length dimension that reaches the pair of second struts, the portion straddling the first strut is the first joint region, and the portions reaching each of the second braces are a pair of first struts. A metal plate body that becomes two joint regions, and a ridge formed on the plate body so as to extend across the first joint region and the second joint region along the length direction thereof. And the first joining region of the plate body A plurality of first holes for avoiding the protrusions and provided with a fixing tool for fixing the first joint region to the first brace, and a pair of the second joint regions of the plate body, respectively. And a second fixing hole provided with a plurality of fasteners for avoiding the protrusions and for fixing the second joining regions to the second braces. And

  The protrusion is formed by protruding from the surface of the plate body in a convex shape in cross section.

  The protrusion is formed at the center in the width direction of the plate body along the length direction of the plate body.

  A pair of the protrusions are formed along the length direction of the plate body at an equal distance from the center line in the width direction of the plate body.

  In the bracing metal fittings for wooden buildings according to the present invention, it is possible to increase the strength of the plate body without increasing the plate thickness, and to ensure a high stress at the connecting position between the braces, and to transmit the stress smoothly. It is possible to improve the workability by reducing the number of fixing holes for weight reduction and bracing, and improve the workability of the work, and even if there is a construction error in the installation of braces on the frame of an existing wooden building, The body can be securely and firmly fixed to the braces to prevent deformation of the plate body, and the reinforcement performance by bracing can be surely exhibited.

It is a front view of a frame which shows an example of the state of repair construction of the existing wooden building where the bracing connection hardware for wooden buildings concerning the present invention is used. It is a top view which shows suitable one Embodiment of the bracing connection hardware for wooden buildings which concerns on this invention. FIG. 3 is a side view of the brace fitting shown in FIG. 2. FIG. 3 is a front view of the bracing connection hardware shown in FIG. 2. FIG. 3 is a cross-sectional view taken along line AA in FIG. It is a front view which shows a mode that the bracing connection hardware shown in FIG. 2 was set to the bracing structure. It is a top view corresponding to FIG. 2 which shows the 1st modification of the bracing connection hardware for wooden buildings which concerns on this invention. It is a top view corresponding to FIG. 2 which shows the 2nd modification of the bracing connection hardware for wooden buildings which concerns on this invention. It is explanatory drawing explaining the 3rd modification of the bracing connection hardware for wooden buildings which concerns on this invention, Comprising: (A) is a top view, (b) is a side view, (c) is a front view.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a bracing connection hardware for wooden buildings according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an example of a state of repair work on an existing wooden building using the bracing connection hardware for a wooden building according to the present embodiment.

  When renovating an existing wooden building for seismic reinforcement or the like, an X-shaped bracing structure 2 is installed inside the frame 1 of the wooden building. A frame 1 of an existing wooden building is constructed in a vertically long rectangular shape by a lower wooden base 1a or wooden beam material, an upper wooden beam material 1b, and left and right wooden pillar materials 1c and 1d. In this case, a wall (not shown) is provided inside the frame 1.

  In the case of renovation, if the construction can only be performed from the indoor side to maintain the outer wall, or conversely, if the construction is performed only from the outer wall side of the wooden building so as to maintain the inner wall, the depth of the wall where the bracing structure 2 is installed and constructed The construction space in the direction (wall thickness direction) has a shallow depth and is a thin space.

  As described in the background art, the X-shaped bracing structure 2 installed in the construction space having a shallow depth needs to prevent the depth of the wall from becoming thick. Regarding one diagonal direction of the X-shape of the bracing structure 2, a long wooden strip-like bracing (hereinafter referred to as a first bracing) 3 is arranged so that its thickness direction is in the wall thickness direction. Install and use.

  Regarding the other X-shaped diagonal direction of the bracing structure 2, the first bracing is not positioned outside the first bracing 3 by being overlapped with the first bracing 3 in the wall thickness direction. 3 on both sides of the first brace 3 so as to be flush with each other in the same plane as 3, arrange a pair of short wooden strip-like braces (hereinafter referred to as second braces) 4, 4, Similar to the first bracing 3, these second bracings 4 and 4 are installed and used so that their plate thickness directions are in the wall thickness direction.

  The X-shaped bracing structure 2 connects the pair of second braces 4, 4 to the first brace 3 from both sides, and the pair of second braces 4, 4 is the first brace. 3 is configured so as to be straight in series. The bracing connection hardware 5 for a wooden building according to the present embodiment described below is used to connect the first bracing 3 and a pair of second bracings 4 and 4 located on both sides thereof.

  When the bracing structure 2 is installed and constructed on the rectangular frame 1 described above, a set of corner portions (a joint portion: upper right and lower left corners in FIG. 1) of one diagonal direction of the frame 1 Both ends 3a of the first bracing 3 in the length direction are joined to the metal fittings 1e and 1f. In addition, a pair of second bracings 4 are provided on each of the metal fittings 1g and 1h at a pair of corners in the other diagonal direction of the frame 1 (joint part: upper left and lower right corners in FIG. 1). 4 One end 4a of each length direction is joined.

  Specifically, for example, as shown in the drawing, the upper end 4a of the upper left upper bracing 4 is joined to the upper left corner, and the lower end 4a of the lower second lower bracing 4 is joined to the lower right corner.

  Thus, the first bracing 3 along one diagonal direction and the pair of second bracings 4 and 4 along the other diagonal direction are both side edges 3b of the first bracing 3 in the width direction orthogonal to the length direction. , 3b, the other ends 4b, 4b in the length direction of the pair of second braces 4, 4 are arranged in abutting direction (see FIG. 6).

  After that, the other ends 4b and 4b in the length direction of the pair of second braces 4 and 4 are respectively in the same plane of the second braces 4 and 4 and the first brace 3, that is, the first and second braces. The brace connecting hardware 5 is connected so as to intersect with the side edges 3b and 3b in the width direction of the first brace 3 in an X shape so that 3, 4, and 4 are continuously flat without any step.

  The bracing connection hardware 5 for a wooden building according to the present embodiment is applied to connect the first bracing 3 and the pair of second bracings 4 and 4 so as to intersect in an X shape within the same plane.

  As shown in FIGS. 2 to 6, the bracing connection hardware 5 for a wooden building according to the first embodiment is mainly a pair of first bracings arranged outside the first bracing 3 and both side edges 3 b and 3 b in the width direction. A metal plate 6 made of steel or the like provided so as to extend over a series of two bars 4 and 4, and formed on the plate 6 in order to enhance its compressive strength and improve stress transmission performance. Ridges 7a and 7b, and fixing holes 8 and 9 formed on the plate body 6 and provided with fixing members for fixing the plate body 6 to the first and second braces 3, 4 and 4, respectively. Is done.

  The plate body 6 is formed from a thin flat plate-like metal plate as a thin member having an approximately rectangular shape having a length and a width. The plate body 6 has a first brace 3 and a pair of second braces 4 and 4 constituting the X-shaped bracing structure 2 at a location where the first brace 4 intersects in an X shape from the upper second brace 4 on the one side. It is provided in a range extending from one brace 3 to the other lower second brace 4. In other words, the plate body 6 is formed to have a length dimension that reaches the pair of second braces 4 and 4 across the first brace 3.

  As a result, the plate body 6 has a central portion in the length direction at the position of the first bracing 3 and both end portions in the length direction at the sides of the first bracing 3, respectively. Located in.

  Of the front and back surfaces in the plate thickness direction, the plate body 6 has the back surface 6a placed on the plate surfaces 3c, 4c, 4c of the strip-like first and second bracings 3, 4 and 4 so as to overlap each other. Installed at 3, 4 and 4. The back surface 6a of the plate body 6 is formed flat without protrusions or the like so as to be able to be aligned in the longitudinal direction with respect to the second braces 4, 4, and the plate surfaces 4c, 4c of the second braces 4, 4 It is configured to be slidable along the length direction.

  About the width dimension of the plate body 6, what is necessary is just to put the both end side part of the said plate body 6 on the plate | board surface 4c, 4c of each 2nd bracing 4,4, and to be piled up. It may be narrower or wider than the width dimension, and the width is not limited. In the example of illustration, the width dimension of the plate body 6 is made equal to the width dimension of the 2nd bracing 4,4.

  The plate body 6 has a back surface 6a superimposed on the plate surface 3c of the first brace 3, and a central portion in the length direction, which is a portion straddling the first brace 3, is a first joint region (in FIG. 6, a satin portion). X). Further, the plate body 6 is a portion in which the back surface 6a is overlapped on the plate surfaces 4c and 4c of the pair of second bracings 4 and 4 to reach the second bracings 4 and 4, respectively. Is a pair of second joining regions (indicated by a plain portion in FIG. 6) Y and Y.

  And, in the other diagonal direction of the frame 1, the lower end 4b of the upper second brace 4 and the upper end 4b of the lower second brace 4 are respectively opposite to the widthwise side edges 3b, 3b of the first brace 3, respectively. This is a boundary B between the first junction region X and the second junction regions Y and Y.

  The plate body 6 has a compressive force acting in the other diagonal direction of the frame 1 (the series direction of the second braces 4 and 4) sandwiched between the pair of second braces 4 and 4 and the second braces 4 and 4. The compressive stress generated in the second braces 4 and 4 is transmitted toward the first brace 3 so that the one brace 3 bears as a unit, and the compressive stress generated in the first brace 3 by this stress transmission is second. It is formed with a plate thickness that can mutually ensure the action of transmitting toward the braces 4 and 4.

  The plate body 6 may be in the form of a plate, but in this embodiment, the plate body 6 protrudes outward on both sides in the width direction of the plate body 6 and has a second bracing on the back surface 6a side. 4 and 4 are bent in the plate thickness direction (the wall thickness direction of the frame 1), locked to the second braces 4 and 4 from both sides in the width direction, and the plate body 6 is fitted to the second braces 4 and 4 A claw portion 10 is formed for fitting and regulating rattling and useless movement. The nail | claw part 10 does not need to be formed.

  In the case where the claw portions 10 are formed, each claw portion 10 is further provided with the second braces 4 and 4 in order to hold the plate body 6 to the second braces 4 and 4 and to maintain the attachment state stably. It is preferable to provide a grip 11 that is elastically contacted from the width direction. The grip 11 bends the front end side of the pair of claw portions 10 spaced from the bent portion of the claw portion 10 in a “<” shape toward the inner side in the width direction of the plate body 6 where the distance is narrowed. Consists of.

  When the plate 11 is attached to the second braces 4, 4, the grip 11 is a second point based on the bent portion of the claw 10 by the reaction force of the claw 10 being pushed outward in the width direction of the plate 6. It is designed to be elastically contacted by braces 4 and 4.

  The plate body 6 formed in this way protrudes so as to extend across the first junction region X and the second junction regions Y, Y through the boundaries B, B along the length direction thereof. Strips 7a and 7b are formed. Therefore, the protrusions 7a and 7b are formed to have a considerable length dimension. In other words, “extends over the first and second junction regions X, Y, Y” means that “from the first region X to the second regions Y, Y” "Consecutively and integrally provided" state.

  As can be understood by referring to FIG. 6, the protrusions 7 a and 7 b are extended from the position of the first brace 3 toward the respective positions of the pair of second braces 4 and 4, and have one end portion. It is formed so that the side is located at the first bracing 3 and the other end side is always located at the second bracing 4, 4. In the present embodiment, the ridges 7 a and 7 b are formed by the first ridge 7 a formed between the first brace 3 and the upper second brace 4, and the first brace 3 and the lower second brace 4. It is comprised from the 2nd protrusion part 7b formed in between.

  As shown in FIG. 2, the first protrusions 7 a and the second protrusions 7 b are formed in parallel with the center line C in the width direction of the plate body 6 along the length direction of the plate body 6. Further, in the illustrated example, both the first protrusion 7 a and the second protrusion 7 b are formed in a pair in the width direction of the plate body 6 at an equal distance from the center line C in the width direction of the plate body 6. . Therefore, four protrusions 7a and 7b are formed.

  As shown in FIG. 6, between the pair of first protrusions 7 a, a lower side end extending from the boundary B of one first protrusion (left side in the figure) 7 a to the first brace 3, and The upper side end extending from the boundary B of the other first protrusion (right side in the figure) 7a to the second brace 4 has a short length of the same length. Similarly, the upper side end extending from the boundary B of one first ridge 7a to the second brace 4 and the boundary B of the other first ridge 7a extends to the first brace 3. The lower side end is a long dimension having the same length.

  Accordingly, the pair of first protrusions 7a have the same area occupied by the first protrusions 7a with respect to the first and upper second bracings 3 and 4 in the width direction of the plate body 6, and both pass through the boundary B. Located in. The same relationship is established between the pair of second protrusions 7b.

  Furthermore, when viewed in the series direction of the second braces 4, 4, the first ridge 7a and the second ridge 7b are mutually in the left side in FIG. 6 from the boundary B of the first ridge 7a. The lower side end extending to the first bracing 3 and the lower side end extending from the boundary B of the second protrusion 7b to the lower second bracing 4 have short lengths of equal length. Similarly, an upper side end extending from the boundary B of the first ridge 7a to the upper second bracing 4 and an upper side end extending from the boundary B of the second ridge 7b to the first bracing 3 are also shown. A part is a long dimension of equal length.

  Therefore, in the first and second ridges 7a and 7b, the first and second ridges 7a and 7b with respect to the first and second bracings 3, 4 and 4 in the length direction of the plate body 6. Occupy the same area, and both are located so as to pass through the boundaries B and B. In the figure, the first and second protrusions 7a and 7b on the right side have the same relationship.

  In the first embodiment, as shown in FIGS. 4 and 5, the cross-sectional shape of the protrusions 7a and 7b is raised from the surface 6b of the plate body 6 on the side opposite to the back surface 6a in a convex shape. It is formed by molding. The convex ridges 7a and 7b are preferably formed with a rounded surface so as not to damage the heat insulating material or the like filled in the wall of the frame 1 to be repaired.

  The plate portion 6 is further provided with a plurality of first fixing holes 8 through the first joining region X in the center in the length direction so as to avoid the protrusions 7a and 7b and in the plate thickness direction. In addition, a plurality of second fixing holes 9 are formed in the second joining regions Y, Y on both ends in the length direction, similarly, avoiding the protrusions 7a, 7b and penetrating in the plate thickness direction. Arranged.

  The first fixing hole 8 is provided with a fixing tool (not shown) such as a screw or a nail for fixing the first joining region X of the plate body 6 to the first brace 3. The central part in the length direction of the plate body 6 is joined and fixed to the first brace 3 by these fixing tools provided on the first bracing.

  In the second fixing hole 9, a fixing tool (not shown) such as a screw or a nail for fixing the pair of second joining regions Y, Y of the plate body 6 to the pair of second bracings 4, 4, respectively. These two fixtures provided in the second fixing holes 9 are joined and fixed to the pair of second braces 4 and 4, respectively, at both ends in the longitudinal direction of the plate body 6.

  Since the fixing holes 8 and 9 are provided so as to avoid the protrusions 7 a and 7 b formed in the plate body 6, the fixing holes 8 and 9 are provided in a smaller number than that in the case where the fixing holes 8 and 9 are provided uniformly on the entire surface of the plate body 6. In other words, since the compressive strength of the plate body 6 is enhanced by the protrusions 7a and 7b, buckling can be prevented, and stress transmission is performed smoothly in the length direction of the plate body 6, so that The number of fixtures for joining the plate body 6 to the braces 3, 4, 4 and hence the number of fixing holes 8, 9 are reduced.

  In the illustrated example, the first fixing holes 8 are disposed between the protrusions 7 a and 7 b and the protrusions in the width direction of the plate body 6 so as to be scattered in the width direction and the length direction of the first brace 3. It is provided at a position on the outside of the strips 7a and 7b. The second fixing holes 9 are also provided between the protrusions 7a and 7b so as to be scattered in the width direction and the length direction of the second braces 4 and 4.

  Since some of the fixing holes 8 and 9 are arranged between the protrusions 7a and 7b that improve the cross-sectional performance of the plate body 6, the length direction of the plate body 6 (the second bracings 4 and 4 Even if compressive force is applied in the series direction (diagonal direction of the frame 1), the fixing members provided in the fixing holes 8 and 9 are such that the protrusions 7a and 7b located on both sides thereof resist the compressive force. Thus, a high bonding strength between the plate body 6 and the braces 3, 4, and 4 can be maintained.

  Next, the effect | action of the bracing connection hardware 5 for wooden buildings which concerns on this embodiment is demonstrated. The brace connection metal fitting 5 of the present embodiment includes a first brace 3 in a state in which both ends 3a in the length direction are joined to the corners of the frame 1, an upper end 4a in the length direction at the other corners of the frame 1, and When the pair of upper and lower second braces 4 and 4 in a state where the lower ends 4a are joined, the brace structure 2 is provided.

  When attaching the bracing connection hardware 5, the bracing structure 2 is attached from one of the indoor side or the outer wall side, and both end portions in the longitudinal direction of the plate body 6 are overlapped with the pair of second bracings 4 and 4, respectively. At the same time, the center in the length direction of the plate body 6 is overlapped with the first bracing 3, the first joint region X is aligned with the first brace 3, and the pair of second joint regions Y and Y are respectively connected to the second brace 4, Align to 4.

  At this time, the plate body 6 can be easily attached and set at an appropriate position by sliding the plate body 6 in the length direction of the second braces 4 and 4. In addition, the claws 10 of the plate body 6 are attached so as to be fitted to the second braces 4, 4, and rattling and useless movements can be regulated when the brace connection hardware 5 is attached, and the attachment is completed smoothly. can do.

  Further, when the grip 11 is provided, the bracing connection hardware 5 can be held by the second bracing 4 and 4 with the grip 11 so that the attachment state can be stably maintained, and the bracing of the subsequent bracing connection hardware 5 can be maintained. In joining and fixing to the structure 2, the operator can perform the work conveniently and skillfully with both hands separated from the plate body 6.

  At the stage where the brace connecting hardware 5 is set to overlap the braces 3, 4, 4 of the brace structure 2, the pair of first protrusions 7 a in the width direction of the plate body 6 is connected to the lower end 4 b of the upper second brace 4. The upper second bracing 4 and the first bracing 3 are crossed over the portion where the side edge 3b located on the upper side of the first bracing 3 in the width direction faces (the boundary B between the first and second joining regions X and Y). And positioned.

  Similarly, in the pair of second protrusions 7b in the width direction of the plate body 6, the upper end 4b of the lower second brace 4 and the side edge 3b located on the lower side of the other in the width direction of the first brace 3 (the first 1 and the second joint area X and Y, and the lower second brace 4 and the first brace 3 are positioned across the boundary B).

  When viewed in the series direction of the pair of second braces 4, 4, the first ridge 7 a and the second ridge 7 b are positioned in the first joining region X so as to be aligned along the series direction.

  In such an arrangement state of the ridges 7a and 7b, the first joining region X of the bracing connection hardware 5 is joined to the first bracing 3 by a fixing tool such as a screw or a nail provided in the first fixing hole 8. The pair of second joining regions Y and Y are joined and fixed to the second bracing 4 and 4 on both sides of the first bracing 3 by the same fixture provided in the second fixing hole 9.

  By the joining and fixing with the fixing tool, the work of attaching the brace connecting hardware 5 to the brace structure 2, that is, the connecting work of the first brace 3 and the pair of second braces 4 and 4 is completed.

  When a compressive force acts in one diagonal direction of the frame 1, the first brace 3 can resist this. When a compression force is applied in the other diagonal direction in which the pair of second braces 4, 4 are arranged in series on the frame 1, the pair of second braces 4, 4 are connected together with the first brace 3 by the brace connection hardware 5. In addition, the brace connection hardware 5 transmits the compressive stress between the braces 3, 4, and 4 while resisting the compressive force. Thereby, the frame 1 of a wooden building can be appropriately reinforced.

  In the bracing connection hardware 5 for a wooden building according to the present embodiment, the boundary B of the first and second joining regions X, Y, and Y where the braces 3, 4 and 4 are not continuous with the plate body 6 which is the main body. The ridges 7a and 7b are formed so as to extend over the first and second joining regions X, Y and Y at the same time as crossing over B.

  Thereby, the ridge which improves the cross-sectional performance of the plate body 6 and strengthens compressive strength in all the 1st and 2nd joining area | regions X, Y, and Y which join the bracing connection metal fitting 5 to the bracings 3, 4, and 4. The portions 7a and 7b are present, and smooth stress transmission between the braces 3, 4 and 4 can be ensured, and the brace composed of the braces 3, 4, 4 and the brace connecting hardware 5 without deformation of the plate body 6. The reinforcement performance by the structure 2 can be exhibited reliably.

  Since the compressive strength of the plate body 6 and by extension, the bracing connection metal fitting 5 is increased without increasing the plate thickness by the protrusions 7a and 7b, buckling can be prevented. Therefore, it is possible to reduce the number of fixtures for joining and fixing the plate body 6 to the braces 3, 4 and 4, thereby reducing the number of the fixing holes 8 and 9 formed. Can be improved.

  In addition, due to the installation construction error of the brace structure 2 to the frame 1 of the wooden building, even if a gap occurs or the angle changes between the first brace 3 and the pair of second brace 4, 4 respectively, Since the protrusions 7a and 7b of the plate body 6 are positioned in the vicinity of the boundaries B and B, the plate body 6 can be securely and firmly fixed to the braces 3, 4 and 4, It is possible to prevent deformation such as buckling in the vicinity of B, ensuring smooth stress transmission between the braces 3, 4, and 4, and also from this aspect, the reinforcement performance by the brace structure 2 is reliably exhibited. Can be made.

  Since the protrusions 7a and 7b are integrally formed by press-molding the plate body 6 or the like, it is possible to ensure weight reduction and also improve workability.

  Since the arrangement of the first protrusions 7a and the second protrusions 7b is uniform with respect to the first and second bracings 3, 4, and 4, the bracings 3, 4, and 4 have a uniform connection strength. It can be firmly connected.

  FIG. 7 shows a first modification of the bracing connection hardware 5 for a wooden building in the embodiment. This 1st modification is provided with the protrusion part 7 which formed the said 1st protrusion part 7a and the 2nd protrusion part 7b integrally in series continuously. Since the number of protrusions 7 formed is two, which is halved compared to the above embodiment, it can be manufactured more easily. Even in such a modification, it is a matter of course that the same operational effects as those of the above-described embodiment can be obtained.

  FIG. 8 shows a second modification. In the second modified example, the protrusion portion 7 of the first modified example is positioned at the center in the width direction of the plate body 6 and is formed along the length direction of the plate body 6. In this case, the fixing holes 8 and 9 are provided so as to be scattered around the protruding portion 7 so as to surround the protruding portion 6.

  In the second modified example, the number of protrusions 7 formed is one, which is halved compared to the first modified example, so that it can be manufactured more easily. Even in such a modification, it is a matter of course that the same operational effects as those of the above-described embodiment can be obtained.

  FIG. 9 shows a third modification. In the third modified example, the ridge 7 protrudes outward in the width direction of the plate body 6 and in the plate thickness direction of the plate body 6 (the plate thickness direction of the second braces 4, 4) is the back surface 6a. It is formed of a pair of ribs bent so as to rise to the opposite surface 6b side (the opposite side to the second bracing 4, 4).

  Even with such rib-shaped protrusions 7, the cross-sectional performance of the plate body 6 is improved, and the compressive strength of the brace connection hardware 5 is enhanced, so that buckling can be prevented, and Of course, the same effect can be secured. In the illustrated example, a notch 11 a is partially cut in the length direction of the plate body 6 at a lower portion of the claw portion 10 of the plate body 6, and a lower part than the notch 11 a is slightly inward in the width direction of the plate body 6. And a grip 11 for holding the second braces 4 and 4 is formed.

DESCRIPTION OF SYMBOLS 1 Frame of wooden building 2 Bracing structure 3 1st bracing 3a Both ends in the length direction of the 1st bracing 3b Both lateral edges of the 1st bracing 4 A pair of 2nd bracing 4a One end of the 2nd bracing 4b 1st 2 The other end in the longitudinal direction of the bracing 5 The bracing connection hardware for wooden buildings 6 Plate body 6a The back surface of the plate body 6b The surface of the plate body 7, 7a, 7b Projection section 8 First fixing hole 9 Second fixing hole C Center line in the width direction of the plate body X first joint region Y second joint region

Claims (4)

The other ends in the length direction of the pair of second braces where one end in the length direction is joined to each side edge in the width direction of the first braces where both ends in the length direction are joined to the frame of the wooden building Is a bracing connection hardware for a wooden building for connecting the pair of second braces and the first braces so that they intersect in an X shape within the same plane,
The first straddle is formed with a length that reaches the pair of second braces, and the portion straddling the first braces is a first joint region, and the portions that reach the second braces are a pair of second joints. A metal plate body to be an area;
A protrusion formed on the plate body so as to extend along the length direction between the first joint region and the second joint region;
A plurality of first fixing holes provided in the first joint region of the plate body, avoiding the protrusions, and provided with a fixing tool for fixing the first joint region to the first bracing;
Each of the pair of second joining regions of the plate body is provided with a plurality of fasteners for avoiding the protrusions and for fixing the second joining regions to the second braces. A bracing fitting for a wooden building comprising a second fixing hole.   2. The bracing connection fitting for a wooden building according to claim 1, wherein the protruding portion is formed to protrude from the surface of the plate body in a convex shape in cross section.   3. The bracing metal fitting for a wooden building according to claim 1, wherein the protruding portion is formed at the center in the width direction of the plate body along the length direction of the plate body.   3. The wooden building according to claim 1, wherein a pair of the protruding portions are formed along the length direction of the plate body at an equal distance from the center line in the width direction of the plate body. Bracing connection hardware.

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