以下、本発明の実施の形態を好適な実施の形態として例示する野縁取付金具を図面に基づいて詳細に説明する。
図１は、本発明の実施形態に係る野縁受け用下地材に野縁を取付けした状態を示す説明図である。この図に示す野縁受け用下地材１には、吊りボルトを介さずに直接的に躯体天井部を構成する垂木用や母屋用のＣ型鋼（Ｃ字状のリップ溝型材）、或いは、吊りボルトの下端部に取り付けられたコ字状の野縁受けを含むものであり、かかる野縁受け用下地材１に野縁取付金具３を介して取り付けられる野縁２に、天井パネルがネジ固定されて天井下地を構成している。
Hereinafter, a field edge mounting bracket that illustrates the embodiment of the present invention as a preferred embodiment will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view showing a state in which a field edge is attached to a field edge receiving base material according to an embodiment of the present invention. The base material 1 for receiving the field edge shown in this figure is a C-shaped steel (C-shaped lip groove type material) for rafters or purlins that directly constitutes the ceiling of the frame without using hanging bolts, or is suspended. The ceiling panel is screwed to the field edge 2 which includes the U-shaped field edge holder attached to the lower end of the bolt and is attached to the field edge receiving base material 1 via the field edge mounting bracket 3. It constitutes the ceiling base.
野縁支持受け部３３は、上面片３３１を介して下向きコ字状に折曲された垂下折曲片３３２、３３２を有し、その中央部位となる上面片３３１に締結ボルト３４の挿通孔３３ａが穿設され、両垂下折曲片３３２、３３２に、締結ボルト３４のボルト３４ａの頭またはナット３４ｂを廻り止めセット可能な溝状のボルト保持部３３ｂとを有して、下側部材３ｂ全体が板厚が１．６ｍｍの上側部材３ａよりも薄板材にてプレス一体成型され、締結ボルト３４を介して上面被嵌片３２１の下面域（野縁被嵌部３２のコ字状内面域）に回転及び上下移動可能に連結された状態で仮組付けされている。
ボルト保持部３３ｂはコ字状に切欠きされた溝状に形成され、その溝幅は、締結ボルト３４のボルト３４ａの頭またはナット３４ｂの一辺の寸法幅よりも広幅でかつ回り止め保持できる溝幅を有しており、その切欠き溝の開口側から締結ボルト３４を配設セットできるようになっている。
The field edge support receiving portion 33 has hanging bent pieces 332 and 332 that are bent downward in a U shape via the upper surface piece 331, and the insertion hole 33a of the fastening bolt 34 is inserted into the upper surface piece 331 that is the central portion thereof. Is bored, and both hanging bent pieces 332 and 332 are provided with a groove-shaped bolt holding portion 33b at which the head of the bolt 34a of the fastening bolt 34 or the nut 34b can be stopped and set, and the entire lower member 3b is provided. Is integrally molded by pressing with a thinner plate material than the upper member 3a having a plate thickness of 1.6 mm, and the lower surface area of the upper surface fitting piece 321 via the fastening bolt 34 (U-shaped inner surface area of the field edge fitting portion 32). It is temporarily assembled in a state where it is rotatably and vertically movable.
The bolt holding portion 33b is formed in a groove shape notched in a U shape, and the groove width is wider than the dimensional width of the head of the bolt 34a of the fastening bolt 34 or one side of the nut 34b and can hold the bolt in a non-rotating manner. It has a width, and the fastening bolt 34 can be arranged and set from the opening side of the notch groove.
次いで、締結ボルト３４のナット３４ｂを締め付け操作することで、野縁支持受け部３３と共に野縁２を上動させて野縁折曲片２１を、上面被嵌片３２１と野縁支持受け部３３の両端部（野縁支持受け溝３３ｃと廻り止め当接片３３３の上端面）との間で強固に圧接した状態で挟み込み挟持する（図（Ｄ）参照）。この操作時において、野縁支持受け部３３は、縦姿勢から横姿勢への回転を許容するため、廻り止め当接片３３３と両野縁側面２２、２２との間に所定の隙間を有して、回転操作範囲が図（Ｅ）に示す９０度＋１、２度程度の許容範囲をもって設定されて組み付けられており、ナット３４ｂの締め付け操作に追随して、廻り止め当接片３３３の先端が傾斜した状態で野縁側面２２の内面に当接され、その当接状態が維持されたまま、野縁被嵌部３２の上面被嵌片３２１と野縁支持受け部３３の上面片３３１との間に隙間を保持した、所謂スナップを効かせた状態で、野縁折曲片２１を強固に圧接させて挟持固定することができ、締め付け過ぎや振動により野縁支持受け部３３に挫屈等の変形を生じることが無く、この挟持状態を維持したまま側面被嵌片３２２と廻り止め当接片３３３との間で、両野縁側面２２、２２がビス止めにより確りと挟み込み固定され、野縁２自体の外周が補強された状態で組付け剛性強度を強固なものとするることができる。
Next, by tightening the nut 34b of the fastening bolt 34, the field edge 2 is moved upward together with the field edge support receiving portion 33 to move the field edge bent piece 21 to the upper surface fitting piece 321 and the field edge support receiving portion 33. It is sandwiched and sandwiched between both ends (the field edge support receiving groove 33c and the upper end surface of the anti-rotation contact piece 333) in a state of being firmly pressed against each other (see FIG. (D)). At the time of this operation, the field edge support receiving portion 33 has a predetermined gap between the anti-rotation contact piece 333 and the side surfaces 22 and 22 of both field edges in order to allow the rotation from the vertical posture to the horizontal posture. Therefore, the rotation operation range is set and assembled with an allowable range of about 90 degrees + 1 or 2 degrees shown in FIG. (E), and the tip of the anti-rotation contact piece 333 follows the tightening operation of the nut 34b. The upper surface fitting piece 321 of the field edge fitting portion 32 and the upper surface piece 331 of the field edge support receiving portion 33 are brought into contact with the inner surface of the field edge side surface 22 in an inclined state, and the contact state is maintained. The field edge bent piece 21 can be firmly pressed and fixed by firmly pressing the field edge bending piece 21 in a state where a gap is held between them, and the field edge support receiving portion 33 is buckled due to overtightening or vibration. The side surfaces 22 and 22 of both fields are firmly sandwiched and fixed between the side fitting piece 322 and the anti-rotation contact piece 333 while maintaining this pinched state without causing deformation of the field. The assembly rigidity can be strengthened in a state where the outer periphery of the edge 2 itself is reinforced.
また、側面被嵌片３２２、３２２と廻り止め当接片３３３、３３３とは、野縁側面２２、２２を挟んでビス固定されているので、両野縁折曲片２１、２１を含む４面が野縁被嵌部３２と野縁支持受け部３３とによって、確りと圧接挟持された状態で組付け固定することができ、野縁２自体の外周面が補強された組付け剛性強度をもって両者が一体化され、上下方向やねじれ方向等の振動負荷を受けても、野縁２とのガタツキや位置ズレが防止されて、その挟持状態を好適に維持することができ、野縁被嵌部３２と野縁支持受け部３３の変形が生じることもなく、耐震組付け強度の向上を図ることができる。
Further, since the side fitting pieces 322 and 322 and the anti-rotation contact pieces 333 and 333 are fixed with screws sandwiching the field edge side surfaces 22 and 22, the four surfaces including the two field edge bent pieces 21 and 21 are fixed. The field edge fitting portion 32 and the field edge support receiving portion 33 can be assembled and fixed in a state of being firmly pressed and sandwiched, and both have the assembly rigidity strength in which the outer peripheral surface of the field edge 2 itself is reinforced. Is integrated, and even if it receives a vibration load in the vertical direction or the twisting direction, rattling and misalignment with the field edge 2 can be prevented, and the pinched state can be appropriately maintained, and the field edge fitted portion can be maintained. 32 and ceiling joists that no deformation occurs in the support receiving portion 33, it is possible to improve the seismic assembly strength.
また、廻り止め当接片３３３、３３３は、その上端部が野縁折曲片２１を支持受けする支持受け片に兼用されているので、野縁支持受け部３３の上動操作に伴って、野縁折曲片２１、２１の逆Ｕ字状溝内に野縁支持受け溝３３ｃと共に入り込み野縁２を支持受けすることができ、締結ボルト３４の締め付け操作により広幅な面域をもって支持受けした状態で挟持固定することができ、野縁２の長手方向に対する振動を受けても、野縁被嵌部３２とその縦幅と同幅域をもって共同に支持受け挟持することができ、締結ボルト３４を中心としてその振動負荷を分散支持することができる。その結果、長手方向への振動負荷に対しても耐震性に対する組付け剛性強度を高める補強ができ、野縁２の長手方向や傾斜方向に対する耐震機能が高められ、野縁２への挟持機能が損なわれることなく両者間にガタツキや、位置ズレの発生の防止を図ることができる。
Further, since the upper end portion of the anti-rotation contact piece 333, 333 is also used as the support receiving piece for supporting and receiving the field edge bending piece 21, the movement of the field edge support receiving portion 33 is accompanied by the upward operation of the field edge support receiving portion 33. The field edge 2 can be supported and received together with the field edge support receiving groove 33c in the inverted U-shaped groove of the field edge bent pieces 21 and 21, and is supported and received with a wide surface area by the tightening operation of the fastening bolt 34. It can be sandwiched and fixed in a state, and even if it receives vibration in the longitudinal direction of the field edge 2, it can be jointly supported and sandwiched with the field edge fitting portion 32 and its vertical width and the same width range, and the fastening bolt 34. The vibration load can be distributed and supported around the center. As a result, it is possible to reinforce the assembly rigidity strength against seismic resistance even against a vibration load in the longitudinal direction, enhance the seismic function of the field edge 2 in the longitudinal direction and the inclined direction, and perform the holding function to the field edge 2. It is possible to prevent rattling and misalignment between the two without being damaged.