JPH06280835A - Caulking tightening member - Google Patents

Abstract

PURPOSE:To provide high shear strength without a special tool by composing a caulking lightening member of a shaft rod provided with engaging head at one end and a shaft hole at the other end and a shaft rod provided with an engaging head at one end and an engaging shaft at the other end, and forming the engaging shaft inserted into the shaft hole a little thinner and longer than the shaft hole. CONSTITUTION:A shaft rod 20 is inserted through into the through holes C, C of firmly attached plates A, A from one side to the other side, and the engaging shaft 32 of a shaft rod 30 is inserted from the above other side into a shaft hole 22 of the shaft rod 20. Since the engaging shaft 32 is somewhat thinner and longer than the shaft hole 22, its tip part strikes against the bottom of the shaft hole 22. When a part between the locked heads 21, 31 of both the shaft rods 20, 30 is sandwichedly pressed by tools to press the engaging shaft 32 deeper into the shaft hole 22, its tip part is compressed to expand its shaft part for strongly pressing it against the inside of the shaft hole 22. Slipping out can be more surely prevented by making the mouth 22a of the shaft hole 22 narrower than its inside. Thus shear strength does not lower, and strong connection can be obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は例えば、薄い金属板を
結合して電機制御箱の箱体を作る場合に好適な比較的小
径のカシメ締結具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caulking fastener having a relatively small diameter suitable for making a box body of an electric machine control box by joining thin metal plates.

【０００２】[0002]

【従来の技術】一般に、複数の薄板を重ねて孔を明け、
その孔に半球状の頭部を備えた軸杆からなる丸頭リベッ
トを挿通し、他端に突き出させた軸杆の端部を押し潰し
て両端を丸頭にして止める方法は周知である。それらの
用に供されるリベットは日本工業規格Ｂ１２１３に記さ
れ、大略図６（ａ）で示す形状をしている。2. Description of the Related Art Generally, a plurality of thin plates are stacked to form a hole,
A method is known in which a round head rivet consisting of a shaft rod having a hemispherical head is inserted in the hole, and the ends of the shaft rod protruding to the other end are crushed to make both ends round and fixed. The rivet used for them is described in Japanese Industrial Standard B1213 and has a shape roughly shown in FIG. 6 (a).

【０００３】また、上記した軸杆の端部を押し潰して丸
める方法に代え、軸杆の端部に設けた孔を押し広げて鍔
を作る取付法も周知である。これらの用に供されるセミ
チューブラリベットは日本工業規格Ｂ１２１５に記さ
れ、大略図６（ｂ）で示す形状をしている。Also, instead of the above-described method of crushing and rounding the end portion of the shaft rod, a mounting method of expanding a hole provided at the end portion of the shaft rod to form a collar is also known. The semi-tubular rivet used for these purposes is described in Japanese Industrial Standard B1215 and has a shape roughly shown in FIG. 6 (b).

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、前者は
リベットの軸杆を塑性変形させて丸頭を作る過程を含む
ため、その成形のための特殊工具を必要とし、且つ、か
なり大きなカシメ力を必要とした。後者は比較的小さい
力や簡単の道具によっで連結できる長所がある反面、孔
部分の断面積が小さいため剪断強度が高くとれず、その
結合が外れ易い。また、材料がステンレス材のような粘
性の高くない材料では孔部分に亀裂を生じ易いなどの不
具合があった。However, since the former includes a process of plastically deforming the rod of the rivet to form a round head, a special tool for forming the round head is required and a considerably large caulking force is required. And The latter has the advantage that it can be connected with a comparatively small force or a simple tool, but on the other hand, since the cross-sectional area of the hole part is small, the shear strength cannot be high and the bond is easily broken. Further, if the material is not highly viscous, such as stainless steel, there is a problem that cracks are likely to occur in the holes.

【０００５】[0005]

【課題を解決するための手段】この発明は以上の課題を
解消するため、一端に係合頭部を設け他端に軸孔を設け
た一方の軸杆と、同じく一端に係合頭部を設け他端に前
記一方の軸杆の軸孔へ挿入される係合軸を設けた他方の
軸杆とからなり、前記一方の軸杆に形成した軸孔へ挿入
する係合軸をその軸孔よりやゝ細く且つ長く形成した点
に特徴がある。In order to solve the above problems, the present invention has one shaft rod having an engaging head portion at one end and a shaft hole at the other end, and an engaging head portion at one end. The other shaft rod is provided at the other end thereof with an engaging shaft to be inserted into the shaft hole of the one shaft rod, and the engaging shaft to be inserted into the shaft hole formed in the one shaft rod is provided in the shaft hole. It is characterized by the fact that it is made slightly thinner and longer.

【０００６】[0006]

【作用】重合された被固着物に設けられた透孔へ一側か
ら一方の軸杆を挿入し、他側から前記一方の軸杆の軸孔
へ他方の軸杆を挿入し、両軸杆を軸方向へ押圧すると、
他方の軸杆の先端部が軸孔の底部に押し付けられて変形
し、長さが短縮して外径が増し、軸孔の内面を強圧して
抜けなくなる。Operation: One shaft rod is inserted from one side into the through hole provided in the polymerized adherend, and the other shaft rod is inserted into the shaft hole of the one shaft rod from the other side, and both shaft rods are inserted. When is pressed in the axial direction,
The tip portion of the other shaft rod is pressed against the bottom portion of the shaft hole to be deformed, the length is shortened and the outer diameter is increased, and the inner surface of the shaft hole is strongly pressed and cannot be removed.

【０００７】[0007]

【実施例】以下、図示の実施例によってこの発明を説明
する。図１〜３において、１０はこの発明に係るカシメ
締結具であり、金属板からなる２枚の被固着板Ａ、Ａを
互いに重ね合わせ、それらの間を不動に連結する用に供
される。被固着板Ａ、Ａには互いに連通する一連の透孔
Ｃ、Ｃが穿設され、そこには前記カシメ締結具１０が挿
通されており、抜けないようにカシメられている。その
結果、２枚の被固着板Ａ、Ａは不動に連結される。カシ
メ締結具１０は軟鉄、あるいはアルミニウム合金などで
作られた一方の軸杆２０と他方の軸杆３０とからなって
いる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. 1 to 3, 10 is a caulking fastener according to the present invention, which is used to superimpose two adhered plates A and A made of a metal plate on each other and to immovably connect them. A series of through holes C, C communicating with each other are provided in the adhered plates A, A, and the caulking fastener 10 is inserted therein, and is caulked so as not to come off. As a result, the two adherend plates A, A are fixedly connected. The caulking fastener 10 includes one shaft rod 20 and the other shaft rod 30 made of soft iron or aluminum alloy.

【０００８】こゝで、一方の軸杆２０には、一端に、従
来のリベットに設けられるものと略同形の半球状の係合
頭部２１が設けられ、他端に軸孔２２が同軸状に形成さ
れている。軸孔２２は後述する他方の軸杆３０の係合軸
３２が挿入されるもので、その内面に抜止め手段２３が
形成されている。抜止め手段２３は軸孔２２の口元２２
ａを内部に比して小径に作り、そこに挿入される後述す
る他方の軸杆３０が一旦係止され抜け止めされるように
したものである。Here, one shaft rod 20 is provided with a hemispherical engaging head portion 21 having substantially the same shape as that provided in a conventional rivet at one end, and a shaft hole 22 is coaxial with the other end. Is formed in. The engagement hole 32 of the other axle rod 30 described later is inserted into the shaft hole 22, and the retaining means 23 is formed on the inner surface thereof. The retaining means 23 is the mouth 22 of the shaft hole 22.
The diameter of a is made smaller than that of the inside so that the other shaft rod 30 which will be described later and is inserted therein is once locked and prevented from coming off.

【０００９】抜止め手段２３は前期したように軸孔２２
の内部２２ｂを口元２２ａより大径に形成して構成され
ている。このような内部が大径である形状は比較的生産
が難しく、生産性が劣るので、その形態は、生産性や生
産設備の大小など、種々の基準に応じて効率よく生産で
きるように選択される。まず、形態の基本は図２で示す
ように、バイトや特殊ドリルを用いて軸孔２２を口元２
２ａに比して中側の径が増す、いわゆる逆テーパ形に穿
孔して得られる。又は、図２で示すように、軸孔２２の
内部２２ｂをストレート孔とし、且つその口元２２ａの
部分を縮径加工、いわゆる、スピニング加工したり、あ
るいは金型を用いてプレス成形してその外形を絞り、縮
径部２５を形成することによっても得られる。なお、軸
孔２２の内部を大径に形成するには、以上の方法や形状
に限定されず、例えば、削加工や塑性加工によって図１
中に仮想線Ｇで示すように、環状の円周溝を削り出して
もよいことは勿論である。The retaining means 23 has the shaft hole 22 as described above.
The inside 22b is formed to have a larger diameter than the mouth 22a. Since such a shape with a large diameter inside is relatively difficult to produce and productivity is poor, its shape is selected so that it can be efficiently produced according to various criteria such as productivity and size of production equipment. It First, as shown in FIG. 2, the basic form is to set the shaft hole 22 into the mouth 2 using a cutting tool or a special drill.
It is obtained by punching in a so-called reverse taper shape in which the diameter on the inner side is increased as compared with 2a. Alternatively, as shown in FIG. 2, the inside 22b of the shaft hole 22 is formed as a straight hole, and the portion of the mouth 22a of the shaft 22 is subjected to a diameter reduction process, so-called spinning process, or is press-molded using a die to form its outer shape. Can also be obtained by forming a reduced diameter portion 25. It should be noted that in order to form the inside of the shaft hole 22 to have a large diameter, the method and shape are not limited to those described above, and for example, by machining or plastic working, as shown in FIG.
Of course, an annular circumferential groove may be carved out as indicated by an imaginary line G therein.

【００１０】図５は、前記一方の軸杆２０を塑性加工す
るための製造方法を示す。すなわち、素材Ｍとして、図
中に（ａ）で示す有底の軸孔２２を穿設した円管状の鋼
材を用いる。そして、その外周を図示してない金型によ
って支持し、底部近傍Ｂを据え込み加工して（ｂ）で示
す丸頭からなる係合頭部２１を成形する。この工程にお
いて、前記軸孔２２の底部近傍Ｂの肉が係合頭部２１を
形成すべく外方へ膨出してしまい、内側が環状に引けて
円周溝２４が形成される。そして、（ｃ）で示すよう
に、縮径加工して軸孔２２を所定の形状に成形する。な
お、前記（ａ）で示す軸孔２２のように底部に予め山形
の突部２６を形成しておけば、前記円周溝２４は一層深
い円錐形に形成され、他方の軸杆３０を結合する際に、
後述する係合軸３２がそこへ流入し一層強固な結合が得
られる。FIG. 5 shows a manufacturing method for plastically working the one shaft rod 20. That is, as the material M, a tubular steel material having a bottomed shaft hole 22 shown in FIG. Then, the outer circumference is supported by a mold (not shown), and the vicinity B of the bottom is upset to form an engaging head portion 21 composed of a round head shown in (b). In this step, the flesh in the vicinity of the bottom portion B of the shaft hole 22 bulges outward to form the engaging head portion 21, and the inside is pulled annularly to form the circumferential groove 24. Then, as shown in (c), the diameter of the shaft hole 22 is reduced to form the shaft hole 22 into a predetermined shape. If a mountain-shaped protrusion 26 is previously formed on the bottom like the shaft hole 22 shown in (a), the circumferential groove 24 is formed in a deeper conical shape, and the other shaft rod 30 is connected. When doing
The engagement shaft 32, which will be described later, flows into the engagement shaft 32 to obtain a stronger connection.

【００１１】図４はこれらの工程を一時に行うための金
型Ｄの例を示す。すなわち、金型Ｄは下型Ｚと上型Ｙと
からなり、上型Ｙには素材Ｍを受け入れる型孔Ｐと、前
記軸孔２２より細く形成したピンＸが設けられている。
また、下型Ｚには前記係合頭部２１を成形するための凹
部Ｑが形成され、それら型孔ＰとピンＸ、および凹部Ｑ
によってキャビティが形成される。かくて、（ａ）で示
すように、下型Ｚ上に素材Ｍを置いて上型Ｙを下降さ
せ、強圧すれば、図中、底部近傍Ｂの肉が凹部Ｑによっ
て形成されるキャビティ内へ流動し、係合頭部２１を形
成する一方、素材Ｍの軸孔の入り口付近がピンＸ側へ流
動し、その軸孔２２を縮径する。その結果、図（ｂ）で
示す一方の軸杆２０が効率よく得られる。FIG. 4 shows an example of a mold D for carrying out these steps at one time. That is, the die D is composed of a lower die Z and an upper die Y, and the upper die Y is provided with a die hole P that receives the material M and a pin X that is thinner than the shaft hole 22.
Further, the lower mold Z is formed with a recess Q for molding the engagement head 21, and the mold cavity P, the pin X, and the recess Q are formed.
Form a cavity. Thus, as shown in (a), if the material M is placed on the lower mold Z and the upper mold Y is lowered and strongly pressed, the meat in the vicinity of the bottom B in the drawing enters the cavity formed by the recess Q. While flowing and forming the engaging head portion 21, the vicinity of the entrance of the shaft hole of the material M flows toward the pin X side, and the shaft hole 22 is reduced in diameter. As a result, the one axial rod 20 shown in FIG. 7B can be efficiently obtained.

【００１２】他方の軸杆３０は一端に予め半球状の係合
頭部３１が設けられている。係合頭部３１は従来のリベ
ットに形成されるものと大略同様の形態をなしている。
他方の軸杆３０の他端には前記一方の軸杆２０の軸孔２
２へ嵌合することのできる係合軸３２が形成されてい
る。係合軸３２はその長さを前記軸孔２２の深さより長
く、且つ、その径をやゝ細く作ってある。なお、図３で
示すように、係合軸３２の軸端に細孔３３を設け、前記
軸孔２２の底部へ形成する突起２６をそれよりやゝ太く
作っておけば、両軸杆２０、３０を結合するとき、係合
軸２３の部分が外方へ膨出し易くなり、それらの軸孔２
２と係合軸２３との摩擦結合が一層強固になされる。The other shaft rod 30 has a hemispherical engaging head 31 provided in advance at one end. The engaging head portion 31 has a shape substantially similar to that formed on a conventional rivet.
At the other end of the other shaft rod 30, the shaft hole 2 of the one shaft rod 20 is provided.
An engagement shaft 32 is formed which can be fitted into the shaft 2. The engagement shaft 32 has a length longer than the depth of the shaft hole 22 and a diameter slightly smaller than that of the shaft hole 22. As shown in FIG. 3, if a fine hole 33 is provided at the shaft end of the engaging shaft 32 and the projection 26 formed on the bottom of the shaft hole 22 is made slightly thicker than that, both shaft rods 20, When the 30 are connected, the engaging shaft 23 is likely to bulge outwardly, and the shaft holes 2
The frictional coupling between 2 and the engaging shaft 23 is further strengthened.

【００１３】次に、このカシメ締結具１０を用いて、被
固着板Ａ、Ａを結合する過程を説明する。まず、被固着
板Ａ、Ａの透孔Ｃ、Ｃへ一方の軸杆２０を一側から他側
へ向けて挿通する。そして、他側から他方の軸杆３０の
係合軸３２を前記一方の軸杆２０の軸孔２２に挿入す
る。係合軸３２は軸孔２２によりやゝ細く、且つ長いの
で、その先端部が軸孔２２の底部へ突き当たる。そこ
で、両軸管２０、３０の係止頭部２１、３１間を工具に
よって挟圧し、係合軸３２を軸孔２２内へ一層押し込む
と、その先端部が圧縮され軸部が膨大して軸孔２２の内
面へ強く押し付けられる。ことに軸孔２２の口元２２ａ
を内部より細く形成すれば、その抜け止めが一層確実に
なる。Next, the process of joining the adhered plates A, A using the caulking fastener 10 will be described. First, one shaft rod 20 is inserted into the through holes C, C of the adhered plates A, A from one side to the other side. Then, the engagement shaft 32 of the other shaft rod 30 is inserted into the shaft hole 22 of the one shaft rod 20 from the other side. Since the engaging shaft 32 is slightly thinner and longer due to the shaft hole 22, the tip end thereof abuts the bottom of the shaft hole 22. Therefore, when the engaging head portions 21 and 31 of both shaft tubes 20 and 30 are pressed with a tool and the engaging shaft 32 is pushed further into the shaft hole 22, the tip end thereof is compressed and the shaft portion expands. The inner surface of the hole 22 is strongly pressed. Especially the mouth 22a of the shaft hole 22
If it is formed thinner than the inside, it will be more reliably prevented from coming off.

【００１４】[0014]

【発明の効果】この発明は以上のように、互いに重合さ
れた被固着板Ａ、Ａを結合するためのカシメ締結具１０
を、一方の軸杆２０と他方の軸杆３０とで構成し、それ
らに設けた軸孔２２と係合軸３２とによって結合したも
ので、その結合のためには両者に対して単に軸方向の押
圧力を与えるだけで足り、従来のリベットのように結合
に際して頭部を作る必要がなく、そのためのの型を要し
ない。よって、単純な工具によって結合作業を行うこと
ができる。また、カシメ締結具１０の透孔Ｃに挿通され
る一方の軸杆２０の軸孔２２には他方の軸杆３０の係合
軸３２が嵌合され、その断面積が十分に確保されるの
で、剪断強度の低下がなく、強い結合が得られるなどの
効果がある。As described above, according to the present invention, the caulking fastener 10 for connecting the adhered plates A and A which are superposed with each other.
Is constituted by one shaft rod 20 and the other shaft rod 30 and is coupled by a shaft hole 22 and an engagement shaft 32 provided therein, and for the coupling, the axial direction is simply applied to both. It suffices to apply the pressing force of, and there is no need to make a head when connecting, unlike a conventional rivet, and a mold for that is not required. Therefore, the connecting work can be performed with a simple tool. Further, the engaging shaft 32 of the other shaft rod 30 is fitted into the shaft hole 22 of the one shaft rod 20 which is inserted into the through hole C of the caulking fastener 10, and the cross-sectional area thereof is sufficiently secured. In addition, there is an effect that a strong bond is obtained without lowering the shear strength.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の実施例であるカシメ締結具の一使用状
態を示す断面図であり、（ａ）はカシメ加工の直前の状
態、（Ｂ）は締結終了状態をそれぞれ示すものである。FIG. 1 is a cross-sectional view showing one usage state of a caulking fastener that is an embodiment of the present invention, (a) showing a state immediately before caulking, and (B) showing a fastening completed state.

【図２】他の形態を示す図１相当の断面図である。FIG. 2 is a sectional view corresponding to FIG. 1 showing another embodiment.

【図３】更に他の形態を示す図１相当の断面図である。FIG. 3 is a sectional view corresponding to FIG. 1 showing still another embodiment.

【図４】一方の軸杆２０の成形するための金型の断面図
であり、（ａ）は成形前の状態、（ｂ）は係合終了後の
状態をそれぞれ示す。4A and 4B are cross-sectional views of a mold for molding one of the shaft rods, FIG. 4A showing a state before molding and FIG. 4B showing a state after completion of engagement.

【図５】一方の軸杆２０の成形工程を示す工程図であ
り、（ａ）は素材Ｍの断面形状、（ｂ）は係合頭部２１
を成形した段階での断面形状、（ｃ）は出来上がった状
態を示す断面形状を示す。5A and 5B are process diagrams showing a forming process of one shaft rod 20, wherein FIG. 5A is a cross-sectional shape of the material M, and FIG.
The cross-sectional shape at the stage of molding is shown, and (c) shows the cross-sectional shape showing the finished state.

【図６】従来のリベットの各種を示すもので、日本工業
規格の一部を抜粋して示す外形図である。FIG. 6 is a view showing various conventional rivets and is an outline drawing showing a part of Japanese Industrial Standards.

【符号の説明】[Explanation of symbols]

１０ カシメ締結具 ２０ 一方の軸杆 ２１ 係合頭部 ２２ 軸孔 ２３ 抜止め手段 ２４ 円周溝 ２５ 縮径部 ２６ 突部 ３０ 他方の軸杆 ３１ 係合頭部 ３２ 係合軸 10 Caulking Fastener 20 One shaft rod 21 Engagement head 22 Shaft hole 23 Detachment prevention means 24 Circumferential groove 25 Reduced diameter portion 26 Projection portion 30 Other shaft rod 31 Engagement head 32 Engagement shaft

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 一端に係合頭部を設け他端に軸孔を設け
た一方の軸杆と、同じく一端に係合頭部を設け他端に前
記一方の軸杆の軸孔へ挿入される係合軸を設けた他方の
軸杆とからなり、前記一方の軸杆に形成した軸孔へ挿入
する係合軸をその軸孔よりやゝ細く且つ長く形成してな
るカシメ締結具。1. A shaft rod having an engagement head portion at one end and a shaft hole at the other end, and an engagement head portion similarly provided at one end and inserted into the shaft hole of the one shaft rod at the other end. And the other shaft rod provided with the engaging shaft, the caulking fastener comprising an engagement shaft to be inserted into the shaft hole formed in the one shaft rod, which is slightly thinner and longer than the shaft hole. 【請求項２】 請求項１において、前記一方の軸杆には
抜止め手段が形成されているカシメ締結具。2. The caulking fastener according to claim 1, wherein a retaining means is formed on the one shaft rod. 【請求項３】 請求項１において、前記一方の軸杆に設
けた軸孔は口元が細く絞られているカシメ締結具。3. The caulking fastener according to claim 1, wherein the shaft hole provided in the one shaft rod has a narrowed mouth. 【請求項４】 請求項１において、前記一方の軸杆に設
けた軸孔は内面に環状の周溝が形成されているカシメ締
結具。4. The caulking fastener according to claim 1, wherein the shaft hole provided in the one shaft rod has an annular peripheral groove formed on an inner surface thereof.