【発明の詳細な説明】
本発明はウエルドナツトに係わり、その目的と
する処はナツト孔内を閉塞すべく設けたシール部
材をボルト締付時、脱落せずしかもボルトの締付
に支障を与えないようになしたものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weld nut, and an object of the present invention is to prevent a sealing member provided to close the inside of a nut hole from falling off when tightening a bolt, and to prevent the sealing member from falling off while tightening the bolt. It was made so that there was no such thing.
自動車のボデーやその他機器の組立を簡易迅速
に行うようボルト締付部には予めウエルドナツト
を溶着形成している。そしてこのウエルドナツト
を設けた状態の部材に塗料防錆ワツクス等を塗布
するが、この塗布時、ナツトのねじ孔内に上記塗
料などが侵入すると後のボルト締工程に於てボル
トを締め過ぎて破損してしまつたり、締め付け後
ゆるみが発生するための支障を起こすことが考え
られる。このため塗布装時塗料などがねじ孔内に
侵入しないようウエルドナツトに栓を附したもの
が提案されている。（例えば実公昭57−45449）ま
たこの栓は塗装時ナツトに装着されボルト締時簡
易に脱抜しなければならず、この目的を達成する
ため各種の方法が提案され、実用化されている。
しかし自動車ボデーのメンバの如く密閉された位
置にウエルドナツトを設ける場合にはボルト締に
よつて栓が脱落すると、密閉された空間内に栓が
落ちこみ、これが騒音となつたり、又他の機器に
支障を与えたりすることが考えられる。 Weld nuts are welded in advance to the bolt tightening portions to facilitate and speed up the assembly of automobile bodies and other equipment. Then, a paint, anti-corrosion wax, etc. is applied to the member with this weld nut installed, but if the paint, etc. gets into the threaded hole of the nut during this application, the bolt may be over-tightened in the subsequent bolt tightening process. It is conceivable that problems may occur due to breakage or loosening after tightening. For this reason, it has been proposed that the weld nut is provided with a plug to prevent paint from entering the screw hole during application. (For example, Utility Model Publication No. 57-45449) Furthermore, this plug is attached to the nut during painting and must be easily removed when tightening the bolt, and various methods have been proposed and put into practical use to achieve this purpose.
However, when a weld nut is installed in a sealed position such as a member of an automobile body, if the stopper falls off due to bolt tightening, the stopper may fall into the closed space, causing noise or damaging other equipment. It is possible that it may cause trouble.
本発明はこれに鑑みてなされたもので、ボルト
螺合時に於ても脱落しないシール部材でウエルド
ナツトのねじ孔を閉塞することにより密閉空間に
使用しても異音等が発生しないようになす。即ち
本考案はウエルドナツトの溶着面の反対側座面
に、破断線を刻設したシール部材の外周面を固着
して一体となしたことを特徴とする。 The present invention has been made in view of this, and by blocking the screw hole of the weld nut with a sealing member that does not fall off even when bolts are screwed together, abnormal noise etc. will not be generated even when used in a closed space. . That is, the present invention is characterized in that the outer circumferential surface of a sealing member having a break line engraved thereon is fixed to the seating surface opposite to the welding surface of the weld nut to form an integral structure.
以下本発明を図示の実施例に基づいて説明す
る。 The present invention will be explained below based on illustrated embodiments.
図に於て１は所要の大きさ、形状を有するウエ
ルドナツト、通常の如く中央にねじ孔２を穿設
し、そして固定部材側面に溶着部片３が突設され
る。またウエルドナツト１の溶着部片を突設した
反対側面にはナツト頂面より少しくぼんだ座４を
形成し、この座４内にシール部材５を嵌合し、こ
のシール部材の全外周縁を押圧挾持する如く座の
全周に亘つて第３図に詳示する如くかしめ、この
かしめ部４ａにてシール部材をナツトと一体化す
る。このシール部材５は、ナツト１を鉄板等の固
定部材６に溶着する場合電気溶接によるナツト加
熱時に於ても溶解あるいは変形（歪等）が生じな
い耐熱性の合成樹脂板、例えばフツソ系合成樹樹
脂の薄板を用いたり薄い鉄板（SPC材等）、リン
青銅板等の金属薄板等を用いるもので、これはナ
ツトの座４内に嵌合する形状と大きさ、例えば第
４図のように円形に切断されると共にボルト螺合
時ねじ孔にそつてボルト７が侵入してもこのシー
ル部材を容易に突き破つて挿通されるように破断
線としてスリツト５ａが放射方向に多数刻設され
る。この時放射方向のスリツト５ａはシール部材
の外周縁には達しないようにすると共にスリツト
５ａの先端は第４図Ａのようにシール部材外周端
縁とより内周側でこれと略平行なる同心円周上に
刻設した周回方向のスリツト５ｂと互いに交わる
ようにしてスリツト５ａ，５ａ間に形成される舌
片５Ｃがボルト侵入時容易に屈曲するようになす
か、又は第４図Ｂの如くスリツト５ａのみとす
る。このいずれかの方法であつても舌片５ｃはボ
ルト先端にて第５図の示す如く曲げられた場合、
シール部材が脱落しないようになす。尚破断線は
スリツトでなくノツチでもよく、又放射状に刻設
されたものに限られることはない。 In the figure, reference numeral 1 denotes a weld nut having the required size and shape, a screw hole 2 is bored in the center as usual, and a welding piece 3 is protruded from the side surface of the fixing member. In addition, a seat 4 that is slightly recessed from the top surface of the nut is formed on the opposite side of the weld nut 1 from which the welded part protrudes. The entire circumference of the seat is swaged as shown in FIG. 3 in a pressing manner, and the sealing member is integrated with the nut at this swaged portion 4a. This sealing member 5 is made of a heat-resistant synthetic resin plate, such as a futuristic synthetic resin plate, which does not melt or deform (distortion etc.) even when the nut 1 is heated by electric welding when the nut 1 is welded to a fixing member 6 such as an iron plate. A thin resin plate, a thin iron plate (SPC material, etc.), a thin metal plate such as a phosphor bronze plate, etc. are used, and this has a shape and size that fits into the seat 4 of the nut, for example, as shown in Figure 4. It is cut into a circular shape, and a large number of slits 5a are cut in the radial direction as break lines so that even if the bolt 7 enters along the screw hole when screwing the bolt, it can easily break through this seal member and be inserted. . At this time, the slits 5a in the radial direction are made not to reach the outer peripheral edge of the sealing member, and the tips of the slits 5a are arranged in a concentric circle substantially parallel to the outer peripheral edge of the sealing member on the inner peripheral side as shown in FIG. 4A. Either the tongue piece 5C formed between the slits 5a and 5a intersects with the circumferential slit 5b carved on the circumference so that it can be easily bent when the bolt enters, or the slit 5C is formed as shown in FIG. 4B. 5a only. In either of these methods, if the tongue piece 5c is bent at the tip of the bolt as shown in FIG.
To prevent the seal member from falling off. Note that the breaking line may be a notch instead of a slit, and is not limited to being carved radially.
而して上述の如く構成されたるウエルドナツト
には中央部分に放射状のスリツトを有するシール
部材をその全外周縁を挾持するようにして一体に
設けているため、このナツトととも固定部材に塗
料、防錆ワツクス等を塗布してもねじ孔に塗料な
どの侵入を防止できると共にこれにボルトを螺合
してもシール部材はその外周を挾持されているた
めナツトより脱落することがなく、しかもボルト
先端の侵入によつてシール部材はそのスリツトよ
り拡開して第５図のようになり容易にボルトの侵
入をゆるすことができ、密封されるような箇所に
於て使用される場合でも不用物を該密封室内に落
下させることがないので、他部品との干渉異音の
発生の心配がない等の利点を有する。 Since the weld nut constructed as described above is integrally provided with a sealing member having a radial slit in the center so as to sandwich the entire outer periphery of the sealing member, paint, paint, etc. are applied to the fixing member together with this nut. Even if an anti-rust wax or the like is applied, it is possible to prevent paint from entering the screw hole, and even when a bolt is screwed into it, the seal member is held by its outer periphery, so it will not fall off from the nut. When the tip enters, the seal member expands from its slit as shown in Figure 5, allowing the bolt to enter easily, and even if it is used in a sealed location, it will not be used as an unnecessary item. Since there is no need to drop the parts into the sealed chamber, there are advantages such as there is no need to worry about interference with other parts and generation of abnormal noise.
【図面の簡単な説明】[Brief explanation of the drawing]
第１図は外観斜視図、第２図は左半を断面した
正面図、第３図は要部の拡大図、第４図はシール
部材の平面図、第５図は締付時の説明図である。
１…ウエルドナツト、２…ねじ孔、３…溶着部
片、４…座、４ａ…かしめ部、５…シール部材、
５ａ，５ｂ…スリツト、５ｃ…舌片、６…固定部
材。
Figure 1 is an external perspective view, Figure 2 is a front view with the left half sectioned, Figure 3 is an enlarged view of the main parts, Figure 4 is a plan view of the seal member, and Figure 5 is an explanatory diagram when tightened. It is. DESCRIPTION OF SYMBOLS 1... Weld nut, 2... Screw hole, 3... Welding piece, 4... Seat, 4a... Caulking part, 5... Seal member,
5a, 5b... slit, 5c... tongue piece, 6... fixing member.