JP2005290937A - Earthquake-resisting metal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earthquake-resisting metal fitting given an aseismicity in the same extent as or higher than a fundamental metallic frame rigid structure in a structural frame in a conventional method of the construction of a wooden framework in the conventional method of the construction. <P>SOLUTION: The earthquake-resisting metal fitting is pushed against the structural frame from the horizontal direction and the vertical direction by a propping material propping the opposed sites of the structural frame. The pushed sites may also be composed of a plate or the like receiving the propping material but may also be composed of a material being constituted of bolts and nuts and capable of being forward moved and retracted in parallel with the propping material. Since the structural frame of the earthquake-resisting metal fitting is fixed by not only the bolts or the like which have been used but also the propping force of the propping material in this manner, the slipping-off of a metal fitting installing a brace by an earthquake or the like and the being useless of the brace can be prevented because the earthquake-resisting metal fitting is difficult to be slipped off from the structural frame. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an earthquake-resistant metal fitting that improves the earthquake resistance of a wooden building.

  Conventionally, in order to give a house earthquake resistance, a method of straddling diagonal lines of a wooden structure frame composed of columns and beams is generally used. L-shaped metal fittings are fixed to the corners of the structural frame so that braces can be attached. The L-shaped metal fitting is fixed by fixing the two sides forming the L shape to the column and the beam with bolts or the like.

  However, if a large force is applied to the structural frame due to an earthquake or the like, the force pulling the brace will exceed the force to fix the bracket such as a bolt to the structural frame, and the brace will be detached from the structural frame by the pulling force. It may end up.

  In addition, if the structural frame cannot withstand shaking such as an earthquake and tries to deform into a parallelogram, the corner angle of the structural frame formed by the column and the beam tends to be smaller or larger than 90 degrees. The L-shaped bracket fixed by both the beam and the beam receives a force in a direction to reduce or increase the angle of the two sides forming the L shape from the structural frame. When such a force is received many times, the metal fitting is divided at the base portions of the two sides forming the L-shape, and the effect of attaching the braces may be lost.

  Therefore, an object of the present invention is to provide an earthquake-resistant metal fitting that can fix a brace to a structural frame even when a large shaking occurs in a wooden building due to an earthquake or the like.

  The earthquake-resistant metal fitting according to the present invention includes a pressing portion that is pressed against the structural frame by a tension member that stretches the facing portion inside the structural frame of the wooden building. The pressing portion includes a horizontal pressing portion that is pressed by a stretching material that stretches the structural frame in the horizontal direction, and a vertical pressing portion that is pressed by a stretching material that stretches the structural frame in the vertical direction. Since the earthquake-resistant metal fitting is pressed against the structural frame by the force in the horizontal direction and the vertical direction, even if the bracing tries to pull the earthquake-resistant metal fitting, it is difficult to come off the structural frame.

  In addition, in order to prevent the earthquake-resistant metal fittings from receiving a force from the structural frame to reduce or increase the corner angle of the two sides forming the L-shape due to an earthquake or the like, only one of the columns and beams You may make it fix an earthquake-resistant metal fitting.

  In addition, when the corner angle changes due to an earthquake or the like, the direction of the tension member that stretches the facing portion of the structural frame also changes. If an attempt is made to keep the direction of the struts constant without following any change in the corner angle, internal stress may be generated in the struts and the struts may be destroyed. In order to prevent the breakage of the brace due to a change in the corner angle, fix the multiple parts of the brace to the seismic bracket with a coach screw or bolt so that the direction of the brace can be changed following the change in the corner angle. Instead of this, the tension member may be fixed only by being sandwiched between the pressing portions of the seismic fittings on both sides fixed to the opposite positions of the structural frame.

  Since the earthquake-resistant metal fitting of the present invention can be pressed against the structural frame by a tension member that stretches the inner facing portions of the structural frame, it is difficult to come off the structural frame even when pulled by bracing.

  In addition, since the seismic bracket can be fixed only to one of the pillar and beam constituting the structural frame, even if the structural frame is deformed and the corner angle is changed, it is not cut.

  Furthermore, since the seismic bracket can be supported by sandwiching the bracing material, the bracing material can change its direction following the change in the corner angle. It will not be destroyed.

  FIG. 1 shows a perspective view of the seismic fitting 100 of the present embodiment fixed to the corner of the structural frame. As shown in FIG. 1, the earthquake-resistant metal fitting 100 includes a corner fitting 1 composed of a bottom portion 101 and side walls 102 a and 102 b erected on both sides of the bottom portion 101, and a contact member 104 fixed to the corner fitting 1. The corner stopper 105 is provided.

  As shown in FIG. 1, at the bottom 101 of the corner fitting 1, at least two fixing holes 110, 111 are formed in the long side direction of the bottom 101, and temporary fixing holes 112 are drilled between the fixing holes 110, 111. ing. The earthquake-resistant metal fitting 100 can be fixed to a pillar or a beam by inserting a coach screw, a through bolt or the like through the fixing holes 110 and 111.

  On the other hand, the side walls 102a and 102b of the corner fitting 1 are stepped, with the high side wall portions 106a and 106b having a high height and the low side wall portions 107a and 107b having a low height adjacent to each other.

  The abutting member 104 is welded and erected on the inner side by a fixed length from the end portions of the corner metal fittings 1 of the low side wall portions 107 a and 107 b and the bottom portion 101.

  On the other hand, corner stoppers 105 are welded to the high side wall portions 106 a and 106 b and the bottom portion 101 at the end portions on the side of the high side wall portions 106 a and 106 b of the corner fitting 1. Furthermore, elliptical connection holes 108a and 108b are drilled on the corner stopper 105 side of the high side wall portions 106a and 106b, and circular connection holes 109a and 109b are drilled on the low side wall portions 107a and 107b side.

  A procedure for securing the brace by fixing the earthquake-resistant metal fitting 100 configured as described above to each corner of the structural frame will be described.

  First, the earthquake-resistant metal fitting 100 is fixed to each corner of the structural frame as shown in FIG. In this fixing, the bottom portion 101 is applied to the corner portion of the column 401, the corner stopper 105 is applied to the corner portion of the beam 402, the earthquake-resistant metal fitting 100 is temporarily fixed to the column 401 through screws in the temporary fixing holes 112, and then the above-described fixing. This is done by inserting a coach screw or the like into the column 401 from the holes 110 and 111.

  When each seismic bracket 100 is fixed to each corner of the structural frame in this way, in order to further secure the seismic bracket 100 to the column 401, a tension member 403 is fitted between the seismic brackets 100, and each The earthquake-resistant metal fitting 100 is pressed against the corner with the bracing material 403.

  The seismic bracket 100 fixed to the upper left and upper right of the structural frame shown in FIG. 2 and the seismic bracket 100 fixed to the lower left and lower right have respective bottom portions 101 facing each other, and the seismic bracket fixed to the upper left and lower left. 100 and the earthquake-resistant metal fittings 100 fixed to the upper right and lower right have respective contact members 104 facing each other. The struts 403 having the same length as the distance between the bottoms 101 facing each other or the distance between the paddings 104 are fitted between the bottoms 101 facing each other and between the paddings 104.

  As a result, as shown in FIG. 2, the bracing members 403 oriented in the horizontal direction and the vertical direction are fitted between the seismic fittings 100 fixed to the respective corners. It is pressed against the corner of the structural frame by the force in the direction perpendicular to the direction. Therefore, in this Embodiment, the contact material 104 and the bottom part 101 will function as a horizontal press part and a vertical press part.

  As described above, since the earthquake-resistant metal fitting 100 is pressed by the struts 403, it is fixed to the structural frame remarkably stronger than the conventional case where it is fixed to the structural frame with only bolts or the like. In addition, by striking each earthquake-resistant metal fitting 100 fixed to each corner with the struts 403, a new structural frame is formed by the four struts 403 inside the pillar 401 and the beam 402. The strength of the structural frame itself is also improved.

  It should be noted that the fitting order of the four bracing members 403 fitted between the respective earthquake-resistant metal fittings 100 is not limited, and the fitting materials 403 may be fitted in the order in which they are easily fitted. Further, as described above, the length of the struts 403 facing parallel to the beam 402 fitted between the upper left and upper right and the lower left and lower right earthquake resistant metal fittings 100 is the same as the distance between the bottoms 101 of the earthquake resistant metal fittings 100. For this reason, the contact member 104 or the side wall portions 102a and 102b of the earthquake-resistant metal fitting 100 fixed to the column 401 may be in the way so that it cannot be fitted between the bottom portions 101 of the earthquake-resistant metal fitting 100 or is difficult to fit. Is assumed. In such a case, the struts 403 may be cut into two and fitted between the left and right earthquake-resistant metal fittings 100 one by one.

  When the above-mentioned struts 403 are fitted between the earthquake-resistant metal fittings 100 as described above, coach screws, bolts, or the like are driven into a plurality of locations of the four struts 403 in order to ensure the fixing of the struts 403. Each strut 403 may be fixed to the column 401 or the beam 402.

  If there is a risk that the tip of the high side wall 106a, 106b opposite to the bottom 101 will open, insert the projecting member 403, pass the bolt through the connecting holes 108a, 108b, and tighten the nut from the tip of the bolt. It is possible to prevent the tip from opening by screwing and sandwiching the high side wall portions 106a and 106b with bolts and nuts.

  When the struts 403 are fitted as described above, the braces are attached between the earthquake-resistant metal fittings 100 fixed to the diagonal of the structural frame.

  As shown in FIG. 3 and FIG. 4, first, the tip of the bolt 120 was inserted into the inside of the earthquake-resistant metal fitting 100 from the connection hole 109 a of the earthquake-resistant metal fitting 100 to which one of the braces 132 is attached, and a long nut 133 was welded to the tip. An attachment hole 131 provided at the proximal end of the brace attachment portion 130 is inserted into the bolt 120. Further, the nut 121 and the nut 122 are screwed into the bolt 120, the tip of the bolt 120 is inserted into the connecting hole 109b, and the nut 123 is screwed into the tip of the bolt 120. Also, if the wall is thin and the nut 123 may be exposed on the wall surface, instead of screwing the nut 123, the nut 122 is welded and fixed to the peripheral portion of the connection hole 109b of the high side wall portion 106b in advance. Alternatively, the tip of the bolt 120 may be screwed into the nut 122.

  Next, the brace attaching portion 140 is similarly attached to the other earthquake-resistant metal fitting 100 to which the brace 132 is attached. A long nut 136 having a larger inner diameter than that of the long nut 133 welded to the bracing attachment portion 130 is welded to the tip of the bracing attachment portion 140 as a support portion.

  When the brace attaching portion 140 is attached, the distal end of the long bolt that becomes the brace 132 having a diameter screwed with the long nut 133 is loosely fitted into the long nut 136 and inserted, and the base end of the long bolt 132 is inserted into the long nut 133. Screw together. In order to prevent the long nut 136 from moving to the distal end side of the long bolt 132 when the base end is screwed into the long nut 133, the diagonal to which the brace 132 is attached is increased due to an earthquake or the like. The nuts 134 and 135 are screwed to the distal end side of the long bolt 133.

  When the nuts 134 and 135 are screwed together, the bracing attachment portions 130 and 140 are fixed by the nut 121 so that the bracing attachment portions 130 and 140 do not rotate.

  Thereby, the attachment of the brace 132 to the earthquake-resistant metal fitting 100 is completed.

  In the present embodiment, since the nuts 134 and 135 are screwed onto one of the long nuts 136 through which the ends of the brace 132 are inserted, the long nut 136 moves in the direction of the nuts 134 and 135. However, since the nut or the like is not screwed to the other side, that is, the base end side of the long bolt 133, it can be moved to the other side. Therefore, when the structural frame is deformed into a parallelogram shape due to an earthquake or the like and the diagonal of the structural frame to which the bracing is attached is shortened, the long nut 136 is moved to the proximal end side of the bracing 132 by the shortened diagonal. Since it can move, it is possible to prevent the brace 132 from being deformed due to the compressive force applied to the brace 132 due to the deformation of the structural frame.

  When the two braces 132 are attached in an X shape by the above method, the attachment of the braces 132 is completed.

(Embodiment 2)
In a wooden house, since the interval between beams is larger than the interval between normal columns, the structural frame is often vertically long as shown in FIG. When the brace is attached to the vertically long structural frame, the bracing direction is close to the vertical direction. When the bracing is in a direction close to the vertical direction, the effect of preventing deformation of the structural frame obtained by stretching the bracing is diminished.

  For example, in the case of a vertically long structural frame in which the interval between the columns 401 is 1 m and the interval between the beams is 2.4 m, the earthquake-resistant metal fitting 200 as shown in FIGS. To do. As shown in FIG. 6, the earthquake-resistant metal fitting 200 is symmetric with the center of the earthquake-resistant metal fitting 200 as the axis of line symmetry. The earthquake-resistant metal fitting 200 includes an intermediate metal fitting 2 composed of a bottom portion 201 and side walls 202 a and 202 b erected on both sides of the bottom portion 201 and two contact members 204.

  At least four fixing holes 211 to 214 and two temporary fixing holes 215 and 216 are drilled in the bottom 201 of the intermediate fitting 2 in the long side direction of the bottom 201. The earthquake-resistant metal fitting 200 can be fixed to the column 401 by inserting a coach screw, a through bolt or the like through the fixing holes 211 to 214.

  As shown in FIG. 6, the both side walls 202a and 202b of the intermediate metal fitting 2 are raised at the center, and the left and right low side walls of the high side walls 206a and 206b and the high side walls 206a and 206b are raised. 207a and 207b.

  The high side wall portions 206a and 206b are provided with elliptical connecting holes 209a and 209b drilled in the center and circular connecting holes 208a, 208b, 210a and 210b drilled on both sides of the connecting hole 209. .

  The two abutting members 204 are welded to the bottom portion 201 and the low side wall portions 207a and 207b on both sides at a certain length inside from both ends of the intermediate metal fitting 2, and are erected on the bottom portion 201.

  A construction procedure for improving the earthquake resistance of the structural frame using the earthquake resistant metal fitting 200 and the earthquake resistant metal fitting 100 will be described below.

  First, as shown in FIG. 5, the earthquake-resistant metal fitting 100 is fixed to each corner of the structural frame, and the earthquake-resistant metal fitting 200 is fixed at the same height position of the columns 401 on both sides. Each earthquake-resistant metal fitting 100 is fixed by the same method as in the first embodiment. On the other hand, the seismic bracket 200 is fixed by placing the seismic bracket on the middle portion of the column 401 with the bottom 201 facing the column 401 side, and temporarily fixing the temporary holes 215 and 216 with screws. This is done by inserting a coach screw or the like into 214.

  When the earthquake-resistant metal fitting 100 and the earthquake-resistant metal fitting 200 are fixed, the projecting member 403 is fitted between the earthquake-resistant metal fittings 100 and 200 next. First, as described in the first embodiment, the tension member 403 is fitted between the bottom portions 101 of the earthquake-resistant metal fittings 100 fixed to the upper and lower corners shown in FIG.

  Next, between the two earthquake-resistant metal fittings 100 fixed to the left upper and lower corners, between the earthquake-resistant metal fittings 200 fixed to the left pillar 401, the two earthquake-resistant metal fittings 100 fixed to the right upper and lower corners, A tension member 403 is inserted between the earthquake-resistant metal fittings 200 fixed to the pillar 401.

  As described above, since the earthquake-resistant metal fitting 100 is fixed to the column 401, the contact material 104 of the earthquake-resistant metal fitting 100 fixed to the upper left and upper right corners, and the upper contact of the earthquake resistant metal fitting 200 fixed to the left and right pillars. The material 204 faces, and the contact material 104 of the earthquake-resistant metal fitting 100 fixed to the lower left and lower right corners, and the lower metal contact material 204 fixed to the left and right pillars face each other. A strut material 403 having the same length as the distance between the pad material 104 and the pad material 204 is fitted between the facing pad materials 104 and 204 facing each other.

  Finally, in order to prevent the struts 403 from slipping off, the struts 403 having the same length as that between the bottoms 201 of the seismic bracket 200 fixed to the columns 401 on both sides are fitted between the bottoms 201 of the seismic bracket 200. The bolts are passed through the connecting holes 209a and 209b, and the projecting member 403 is sandwiched between the bolts and nuts via the high side wall portions 206a and 206b. In this way, it is possible to prevent the ends of the high side wall portions 206a and 206b from being opened by sandwiching the projecting member 403 with bolts and nuts through the high side wall portions 206a and 206b.

  Also in the present embodiment, when it is not possible to fit the strut material 403 between the bottom portions 101 of the earthquake-resistant metal fitting 100 or when it is difficult to fit, the strut material 403 is cut into two pieces and the strut material 403 is cut. May be inserted. In addition, as for fixing the seismic bracket 200, the tension member 403 is previously pin-joined at the connection holes 209a and 209b of the two seismic brackets 200, and the two seismic brackets 200 are fixed to the column 401 at the same time. Also good. At the time of fixing, it is preferable to place the two earthquake-resistant metal fittings 200 obliquely with respect to the pillars 401 and put them in the structural frame, and then move the two earthquake-resistant metal fittings 200 into the predetermined positions of the pillars 401 and move them. .

  As in the case of the earthquake-resistant metal fitting 100, the bolt 120 may be fixed by welding and fixing the nut 122 instead of screwing the nut 123 in the earthquake-resistant metal fitting 200.

  As described above, by inserting the struts 403 between the earthquake-resistant metal fittings 100 and 200, two structural frames close to a square are formed inside the vertically long structural frame as shown in FIG. By fixing the earthquake-resistant metal fitting 200 to the middle part of the column, a structural frame close to a square is formed, so that even a vertically long structural frame can be attached to a brace having a rising angle of about 45 °.

  When the struts 403 are fitted between the earthquake-resistant metal fittings 100 and 200, the braces 132 are attached in an X shape to two structural frames formed by fitting the struts 403.

  First, the brace attachment portions are connected to the connection holes 109a, 109b of the earthquake-resistant metal fitting 100 and the connection holes 208a, 208b, 210a, 210b of the earthquake-resistant metal fitting 200 in the same manner as the attachment methods of the brace attachment portions 130, 140 described in the first embodiment. 130 and 140 are attached. Then, both ends of the brace 132 are attached to the brace attaching portions 130 and 140 attached to the earthquake-resistant metal fittings 100 and 200.

(Embodiment 3)
In the above description, the case where the abutting members 104 and 204 and the bottom portions 101 and 201 are pressed by the struts 403 has been described. Instead of 104 and 204, the two nuts 702a and 702b and the head as shown in FIGS. 7A and 7B are screwed into the nuts 702a and 702b in the direction in which the head is pressed by the tension member 403. A bolt 701 may be provided. The nut 702a is welded and fixed to the center of the bottom portions 101 and 201 of the earthquake-resistant metal fittings 100 and 200 so that the bolt 701 can advance and retreat in a direction parallel to the projecting member 403. In addition, as shown in FIG.7 (b), the packing 703 may be formed in the lower part of the nut 702a, and you may make it prevent the nut 702a shifting | deviating.

  If the nuts 702a and 702b and the bolts 701 are attached to a position where they are pressed by the horizontal member of the earthquake-resistant metal fitting 100 (the tensile member 403 extending in the horizontal direction), all the tensile members 403 are attached. Work can be done without difficulty.

  Since the bolt 701 can advance and retreat in the direction parallel to the strut member 403 in this way, the interval at which the strut member 403 is fitted can be changed by moving the bolt 701 back and forth. As described, the earthquake-resistant metal fittings 100 and 200 can be pressed even if the struts 403 are not the same length as that between the contact members 104 and 204 or between the bottom portions 101 and 201. Therefore, if bolts 701 and nuts 702 are used in place of the abutting members 104 and 204, it is possible to save the trouble of processing the struts 403 to the same length as the interval at which the struts 403 are fitted. In addition, by inserting and retracting the bolt 701 after fitting the tension member 403, the tension member 403 can be easily fitted tightly.

(Embodiment 4)
In order to fix the seismic metal fitting 100 to the column 401 more firmly and to make the structural frame more difficult to deform, as shown in FIG. 8, as shown in FIG. The connecting means 150 for connecting the other pillars 401 may be attached. The connecting means 150 includes a connecting bolt 151 and a connecting nut 152, and the connecting bolt 151 is attached to the bottom 101 in a direction parallel to the beam 402.

  The connecting bolt 151 passes through the pillar 401 to which the earthquake-resistant metal fitting 100 is attached and the other pillar 401 and is fixed to each pillar 401 with a nut 152. In this way, by connecting a large number of pillars 401 with the connecting bolts 151, the horizontal displacement of the pillars 401 can be prevented.

(Embodiment 5)
Moreover, although the case where the earthquake-proof metal fittings 100 and 200 were fixed to the structural frame comprised by the column 401 and the beam 402 was demonstrated, the lower part of a structure frame is a material which is hard to fix the earthquake-resistant metal fittings 100, such as concrete and a stone. In some cases, wood may be placed on concrete, stone, or the like, and the earthquake-resistant metal fitting 100 may be fixed horizontally if possible.

(Embodiment 6)
When a split S is provided on the surface of the column 401 to which the seismic bracket is fixed, a coach screw, It is better to devise the insertion position of through bolts.

  For example, as shown in FIGS. 9 (a) and 9 (b), when the seismic brackets 100 and 200 are attached to the pillar 401 having the spine S provided in the center, the center is not the center of the bottom of the seismic brackets 100 and 200 but the center. The fixing holes 901 to 904 may be drilled in a staggered manner at positions shifted by a predetermined distance.

  Further, as described above, the abutting members 104 and 204 are erected on the inner side by a predetermined length from the end portion of the earthquake-resistant metal fitting 100, so that the side surfaces of the end portions of the abutting members 104 and 204 of the strut member 403 are Since it is held by the ribs formed from the three surfaces of the low side wall portions 107a and 107b, the bottom portion 101 or the low side wall portions 207a and 207b, and the bottom portion 201, the earthquake resistant metal fittings 100 and 200 according to the present embodiment are used. The torsion caused by the load can be suppressed together with the tension member.

  In the above description, the case where the earthquake-resistant metal fitting 100 is fixed to the corner 401 of the structural frame has been described. However, the earthquake-resistant metal fitting 100 may be fixed to the corner beam 402.

The perspective view of an earthquake-resistant metal fitting. Overall view of the structural frame with seismic brackets fixed. The partial expanded front view of an earthquake-resistant metal fitting. Partial enlarged side view of seismic bracket. Overall view of the structural frame with seismic brackets fixed. The perspective view of an earthquake-resistant metal fitting. The external view of the earthquake-resistant metal fitting in which the volt | bolt and the nut were used as a press part. A seismic bracket connected to multiple columns. The figure which shows an example which fixes a seismic-proof metal fitting to the pillar divided by the back.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 200 Earthquake-resistant metal fittings 101 201 Bottom part 104,204 Batting material 132 Bracing 400 Fixture 401 Beam 402 Column 403 Strut material

Claims (8)

In earthquake-resistant metal fittings that are attached to structural frames of wooden buildings and braces are attached,
A horizontal pressing portion that is pressed against the structural frame by a tension member that stretches a portion facing the horizontal direction of the structural frame;
An earthquake-resistant metal fitting, comprising: a vertical pressing portion that is pressed against the structure frame by a tension member that stretches a portion facing the vertical direction of the structure frame.   The earthquake-resistant metal fitting according to claim 1, wherein the horizontal pressing portion or the vertical pressing portion includes a rib that supports a surface of the strut member orthogonal to a strut direction.   The earthquake-resistant metal fitting according to claim 1, further comprising connecting means for connecting the structural frame to at least one pillar.   The earthquake-resistant metal fitting according to claim 1, which is attached to a corner of the structural frame.   The earthquake-resistant metal fitting according to claim 1, which is fixed to either one of a beam and a column constituting the structural frame corner. It is attached in the middle of the pillars that make up the structural frame,
The earthquake-resistant metal fitting according to claim 1, wherein the vertical pressing portion is pressed from above and below by the tension member.   The seismic bracket according to claim 1, further comprising a stopper attached to the brace and a brace attaching part including a support part that loosely fits and supports the stopper from the position where the stopper of the brace is attached.   The earthquake-resistant metal fitting according to claim 1, wherein the horizontal pressing portion can advance and retreat in the horizontal direction, and the vertical pressing portion can advance and retreat in the vertical direction.

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