しかしながら、特許文献１に開示されたものでは、止めネジ（７）を螺入し、止めネジ（７）の先端を野縁受けの上面部に締め付けすることで、野縁受けの下面部と補強下地材の上面部とを密着させて固定する構造となっているため、地震等の揺れを受けると、止めネジ（７）の先端に集中負荷が加わって野縁受けの上面部に変形を生じ、野縁受けと補強下地材の締め付け強度が弱まり、両者間にガタツキや位置ズレが生じてしまい、甚だしくは補強下地材が切欠き部から抜け落ちてしまうという危惧がある。
また、特許文献２や３に開示されたものでは、地震等の揺れを受けると、板状固定片の板面が折曲して金具自体が変形してしまうため、野縁受けと補強下地材との密着面が離間しガタツキを生じるだけでなく、ねじれを含む振動負荷を繰り返し受けると、両者間の離間・圧接が繰り返され、甚だしくは金具自体の破損を招来するという耐震強度上の欠点を有している。
したがって、これら従来のもののように、直交対面する下地材の上面部と下面部とを直接面当させ、上部下地材と下部下地材の上面部や側面部に対してネジ押さえし、又はネジ止めする構造のものでは、何れのものも、一方の下地材が水平方向に揺れを受けると、他方の下地材がその厚さ幅方向に傾動する揺れやねじれを受けるというような振動負荷によって、直交面当てされた下地材同士の密着面が離間し、両者間にガタツキ生じるという連結強度上の問題があり、連結固定された耐震用の補強下地材に対する所望の耐震性能を得ることができない。
However, those disclosed in Patent Document 1, screwed into the set screw (7), by tightening the tip of the set screw (7) on the upper surface of the field edge receiving, and the lower surface portion of the field edge receiving reinforcement Because the structure is fixed in close contact with the upper surface of the base material, when it receives a shake such as an earthquake, a concentrated load is applied to the tip of the set screw (7), causing deformation of the upper surface of the field receiver. The tightening strength of the field edge receiver and the reinforcing base material is weakened, and there is a risk that rattling and positional deviation occur between the two, and the reinforcing base material may fall off from the notch.
Moreover, in what was disclosed by patent document 2 and 3, since the plate | board surface of a plate-shaped fixing piece will bend and metal fittings will deform | transform if it receives shaking of an earthquake etc., a field edge receptacle and a reinforcement base material In addition to causing looseness due to separation of the contact surface between the two, repeated vibration load including torsion causes repeated separation and press-contact between the two, resulting in severe damage to the bracket itself. Have.
Therefore, like these conventional ones, the upper surface portion and the lower surface portion of the base material that are orthogonally facing each other are directly brought into contact with each other and screwed or screwed to the upper surface portion and the side surface portion of the upper base material and the lower base material. In any structure, when one base material is swayed in the horizontal direction, the other base material is orthogonally affected by vibration loads such as swaying or twisting in the thickness width direction. There is a problem in connection strength that the contact surfaces of the surface-applied base materials are separated from each other, and there is a backlash between the two, and a desired seismic performance for the seismic reinforcing base material that is connected and fixed cannot be obtained.
振れ止め固定金具４１は、中央の吊りボルト２への吊りボルト固定部と、その両側に振れ止め４への被嵌固定部を有して側面視略コ字状に形成されている。
振れ止め４は、側方が開口する断面コ字状のチャンネル材からなり、吊りボルト２の間隔を維持するために複数の吊りボルト２間に水平状に架設される梁タイプとなっている。そして、振れ止め固定金具４１を、吊りボルト２と振れ止め４とを同時に被嵌することで両者が組付け固定される。
The steady-rest fixing bracket 41 has a suspension bolt fixing portion to the central suspension bolt 2 and a fitting fixing portion to the steady rest 4 on both sides thereof, and is formed in a substantially U shape in side view.
The steady rest 4 is made of a channel material having a U-shaped cross section that opens to the side, and is a beam type that is horizontally installed between a plurality of suspension bolts 2 in order to maintain the distance between the suspension bolts 2. Then, the steadying fixing bracket 41 is fitted and fixed to the suspension bolt 2 and the steadying stop 4 at the same time, and both are assembled and fixed.
下部下地材固定部６１と上部下地材固定部６２とは、その中央部位に配設されて、下部下地材となる野縁受け３や振れ止め４の上面部と、上部下地材となる補強下地材５の下面部とにそれぞれ係合される中面係合片６ａを有し、この中面係合片６ａからそれぞれ上下方向に９０度の対向角度をもって折曲形成され、下部下地材と上部下地材の側面部にそれぞれ係合される側面係合片６１１、６２１と、この側面係合片６１１、６２１からそれぞれ折曲形成され、下部下地材と上部下地材の下面部および上面部にそれぞれ係合される下面係合片６１２、上面係合片６２２とを有して、全体をプレス成型により一体に形成される。
The lower base material fixing portion 61 and the upper base material fixing portion 62 are disposed at the central portion thereof, and the upper surface portion of the field receiver 3 and the steady rest 4 serving as the lower base material and the reinforcing base serving as the upper base material. The inner surface engaging pieces 6a are respectively engaged with the lower surface portion of the material 5 and are bent from the inner surface engaging pieces 6a in the vertical direction at an opposing angle of 90 degrees, respectively. Side surface engaging pieces 611 and 621 that are respectively engaged with the side surface portions of the base material, and the side surface engaging pieces 611 and 621 are respectively bent and formed on the lower surface portion and the upper surface portion of the lower base material and the upper base material, respectively. lower surface engaging piece 612 is engaged, and a top engagement pieces 622 are formed entirely integrally with up less molding.
次に、本発明の実施態様に係る下地材固定金具６を、吊りボルト２に固定された野縁受け３や振れ止め４を下部下地材とし、耐震用の補強下地材５を上部下地材として直交配設させた場合の取付手順について、図４、図５に基づいて説明する。図４（Ａ）は、補強下地材を直交配置させて仮固定する状態を示す正面図、図４（Ｂ）は補強下地材を直交配置させて連結固定した状態を示す正面図、図５は下部下地材と上部下地材の取付け状態を示す斜視図である。これら図に示すように、先ず、下部下地材固定部６１を野縁受け３（振れ止め４）に対してその側面部側から外嵌セットする。このとき、野縁受け３の上面部と下面部に対して、それぞれ延出面部６３ｂを含む中面係合片６ａと延出面部６３ａの先端部間に係合させた状態から、内方に傾斜状に突出する抜止め係止片７４の弾発に抗して押し込む（又は叩き込む）と、図４（Ａ）に示すように下面係合片６１２を含む延出面部６３ａが抜止め係止片７４の傾斜に抗して弾発状に拡開されて押し込み圧入され、ワンタッチで仮組付け固定が行え、遊嵌状態で外嵌セットされる。この仮固定によるセット状態では、抜止め係止片７４が、野縁受け３を乗り越え、その先端部がチャンネル材板厚端部に係止され、遊嵌係合した状態で野縁受け３を抜止め保持する。
Next, the base material fixing bracket 6 according to the embodiment of the present invention is configured such that the field receiver 3 and the steady rest 4 fixed to the suspension bolt 2 are the lower base material, and the seismic reinforcement base material 5 is the upper base material. The attachment procedure when arranged orthogonally will be described with reference to FIGS. 4A is a front view showing a state in which reinforcing base materials are arranged orthogonally and temporarily fixed, FIG. 4B is a front view showing a state in which reinforcing base materials are arranged orthogonally and connected and fixed, and FIG. It is a perspective view which shows the attachment state of a lower base material and an upper base material. As shown in these figures, first, the lower base material fixing portion 61 is externally fitted and set from the side surface side to the field edge receiver 3 (rest stopper 4). At this time, the inner surface engaging piece 6a including the extending surface portion 63b and the distal end portion of the extending surface portion 63a are engaged inwardly with respect to the upper surface portion and the lower surface portion of the field edge receiver 3, respectively. When pushed in (or struck) against the impact of the retaining locking piece 74 projecting in an inclined manner, as shown in FIG. 4A, the extended surface portion 63a including the lower surface engaging piece 612 is retained. The piece 74 is expanded in a bullet shape against the inclination of the piece 74 and is pressed and press-fitted, can be temporarily assembled and fixed with one touch, and is externally fitted in a loosely fitted state. In the set state by temporary fixing, the retaining locking piece 74 gets over the field edge receiver 3, and its tip end is locked to the thick end of the channel material plate, and the field edge receiver 3 is engaged in the loosely engaged state. that holds the retainer.