JP6891081B2 - How to install caulking nuts, caulking tools for caulking nuts, and caulking nuts - Google Patents

How to install caulking nuts, caulking tools for caulking nuts, and caulking nuts Download PDF

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JP6891081B2
JP6891081B2 JP2017180420A JP2017180420A JP6891081B2 JP 6891081 B2 JP6891081 B2 JP 6891081B2 JP 2017180420 A JP2017180420 A JP 2017180420A JP 2017180420 A JP2017180420 A JP 2017180420A JP 6891081 B2 JP6891081 B2 JP 6891081B2
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caulking
nut
crimped
plate
side pressing
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JP2019056402A (en
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近藤　茂樹
茂樹 近藤
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Press Kogyo Co Ltd
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Description

本発明は、被取付板に取り付けるためのカシメナットと、そのカシメナットを被取付板に取り付けるためのカシメナット用カシメ工具と、カシメナットを被取付板に取り付けるカシメナットの取付方法に関する。 The present invention relates to a caulking nut for attaching to a plate to be attached, a caulking tool for caulking the nut to attach the caulking nut to the plate to be attached, and a method for attaching the caulking nut to attach the caulking nut to the plate to be attached.

中板又は厚板で構成される被取付板にナットを取り付ける場合、一般にナットは溶接にて取り付けられる。 When a nut is attached to a plate to be attached composed of a middle plate or a thick plate, the nut is generally attached by welding.

被取付板にナットを溶接する場合、ナットの雌ネジにセット具の雄ネジをねじ込み、被取付板にナットを固定した後、ナットと被取付板の接触部の一部を溶接する。 When welding a nut to a plate to be mounted, a male screw of a set tool is screwed into a female screw of the nut, the nut is fixed to the plate to be mounted, and then a part of the contact portion between the nut and the plate to be mounted is welded.

また、ボルト孔端部に取り付けられるカシメナットとしては、特許文献１記載のものが知られている。このカシメナットは、雌ネジ孔縁部から軸方向に突起するカシメ部を有する。カシメ部は、内径を雌ネジ孔より小さく形成されており、ボルト状のカシメロッドが挿入されることで強制的に外側に押し曲げられて広げられる。 Further, as a caulking nut attached to the end of the bolt hole, the one described in Patent Document 1 is known. This caulking nut has a caulking portion that projects axially from the female screw hole edge portion. The crimped portion has an inner diameter smaller than that of the female screw hole, and is forcibly pushed outward and expanded by inserting a bolt-shaped caulking rod.

またさらに、特許文献２記載の圧入ナットは、パネルの取付孔に挿入されるナット固定部を有する。ナット固定部は、上から順に、段部、溝部及び挿入部を有する。段部及び挿入部の側面には、ネジ山が形成されている。挿入部は、取付孔に挿入されることで取付孔の側面の部分を変形させ、その変形された材料をネジ山の間に入り込ませる。段部は、取付孔の側面の材料を溝部に入り込ませる。 Furthermore, the press-fit nut described in Patent Document 2 has a nut fixing portion to be inserted into a mounting hole of a panel. The nut fixing portion has a step portion, a groove portion, and an insertion portion in this order from the top. Threads are formed on the side surfaces of the step portion and the insertion portion. When the insertion portion is inserted into the mounting hole, the side surface portion of the mounting hole is deformed, and the deformed material is inserted between the threads. The step portion allows the material on the side surface of the mounting hole to enter the groove portion.

特開平１０−２５２７３３号公報Japanese Unexamined Patent Publication No. 10-252733 特開２０１３−１１３３９６号公報Japanese Unexamined Patent Publication No. 2013-113396

ところで、被取付板にナットを溶接する方法では、以下の課題がある。
１．ナットの雌ネジ部が、溶接時の熱によって変形する
２．ナットの雌ネジ部の熱膨張により、セット具の雄ネジ部と、ナットの雌ネジ部とが圧着される
３．セット具を取り外したナットの雌ネジ部に、他のナットを溶接した際のスパッタが付着する
４．ヒュームコレクタ等の設備投資が必要となる
５．溶接ワイヤ、ＣＯ2ガス等の費用が生じる
６．溶接ワイヤ、ＣＯ2ガス等を欠品させないよう管理する必要がある By the way, the method of welding a nut to a plate to be attached has the following problems.
1. 1. The female threaded part of the nut is deformed by the heat during welding. 2. Due to the thermal expansion of the female threaded part of the nut, the male threaded part of the set tool and the female threaded part of the nut are crimped. 3. Spatter when welding other nuts adheres to the female thread of the nut from which the set tool has been removed. Capital investment such as fume collector is required. Welding wire, CO 2 gas, etc. costs are incurred. It is necessary to manage the welding wire, CO 2 gas, etc. so as not to run out.

他方、特許文献１記載のカシメナットと、特許文献２記載の圧入ナットとは、溶接を用いないため、溶接に伴う上記課題を解決可能である。 On the other hand, since the caulking nut described in Patent Document 1 and the press-fit nut described in Patent Document 2 do not use welding, the above-mentioned problems associated with welding can be solved.

しかし、特許文献１記載のカシメナットは、カシメ部の基部を押し曲げるため、その曲げ点が弱く、取付後のナットに高トルクが負荷された時にカシメ部の基部が破損し易いという欠点がある。 However, the caulking nut described in Patent Document 1 has a drawback that the base portion of the caulking portion is easily damaged when a high torque is applied to the nut after mounting because the bending point is weak because the caulking nut described in Patent Document 1 pushes and bends the base portion of the caulking portion.

また、特許文献２記載の圧入ナットは、単に圧入によって取り付けられるため、取付後のナットに高トルクが負荷された時に緩み易い欠点がある。 Further, since the press-fit nut described in Patent Document 2 is simply press-fitted, there is a drawback that the nut is easily loosened when a high torque is applied to the nut after mounting.

そこで本発明は、かかる事情に鑑みて創案され、その目的は、取付後に破損し難くかつ緩み難いカシメナットと、このカシメナットの取り付けに好適なカシメナット用工具および取付方法を提供することにある。 Therefore, the present invention was conceived in view of such circumstances, and an object of the present invention is to provide a caulking nut which is hard to be damaged and loosened after mounting, and a caulking nut tool and a mounting method suitable for mounting the caulking nut.

本発明の一の態様によれば、被取付板の下孔に取り付けるためのカシメナットであって、
ネジ穴が形成されたナット部と、
前記下孔の内周面に圧着させるべく前記ナット部の端面から軸方向に延びて形成されたカシメ部とを備え、
前記ナット部は、前記被取付板の取付面に着座される着座面を有し、
前記カシメ部は、筒状に形成されると共に先端に向かうにつれて外周が縮径または内周が拡径するテーパ状に形成された
ことを特徴とするカシメナットが提供される。 According to one aspect of the present invention, it is a caulking nut for mounting in the prepared hole of the plate to be mounted.
The nut part with the screw hole and
It is provided with a caulking portion formed so as to extend axially from the end surface of the nut portion so as to be crimped to the inner peripheral surface of the prepared hole.
The nut portion has a seating surface that is seated on the mounting surface of the plate to be mounted.
The caulking portion is provided with a caulking nut characterized in that the caulking portion is formed in a tubular shape and is formed in a tapered shape in which the outer circumference is reduced in diameter or the inner circumference is expanded toward the tip.

好ましくは、前記カシメ部は、前記下孔より軸方向に長く形成されるとよい。 Preferably, the crimped portion is formed longer in the axial direction than the prepared hole.

また、本発明の一の態様によれば、カシメナットを被取付板の下孔に取り付けるためのカシメナット用カシメ工具であって、
前記カシメ部の先端に当接されるカシメ側押圧部と、
前記カシメ部とは反対側の前記ナット部の端面に当接されるナット側押圧部と、
前記カシメ部の径方向内方への変形を規制すべく前記カシメ部内に挿入されるピンと、
前記カシメ側押圧部及び前記ナット側押圧部を、対向させて保持すると共に、相対的に近接離間させる工具本体と、
を備えたことを特徴とするカシメナット用カシメ工具が提供される。 Further, according to one aspect of the present invention, it is a caulking tool for caulking nuts for attaching the caulking nut to the prepared hole of the plate to be attached.
The crimped side pressing portion that comes into contact with the tip of the crimped portion,
A nut-side pressing portion that comes into contact with the end surface of the nut portion on the side opposite to the crimped portion,
A pin inserted into the crimped portion to regulate inward deformation of the crimped portion in the radial direction,
A tool body that holds the crimped side pressing portion and the nut side pressing portion so as to face each other and keeps them relatively close to each other.
A caulking tool for caulking nuts is provided.

好ましくは、前記ピンは、前記カシメ側押圧部に出没自在に設けられるとよい。 Preferably, the pin is provided on the caulking side pressing portion so as to be able to appear and disappear.

好ましくは、前記カシメ側押圧部には、前記ピンを突出方向に付勢するスプリングが設けられるとよい。 Preferably, the caulking side pressing portion is provided with a spring that urges the pin in the projecting direction.

また、本発明の一の態様によれば、カシメナットを被取付板の下孔に取り付けるための取付方法であって、
前記カシメナットのカシメ部を被取付板の下孔内に挿入する第１ステップと、
前記カシメ部内に、径方向内方への変形を規制するためのピンを挿入する第２ステップと、
前記カシメ部を、軸方向にカシメることで径方向外方に変形させて前記下孔の内周面に圧着させる第３ステップと、
を備えることを特徴とするカシメナットの取付方法が提供される。 Further, according to one aspect of the present invention, it is a mounting method for mounting a caulking nut in a prepared hole of a plate to be mounted.
The first step of inserting the crimped portion of the caulking nut into the prepared hole of the plate to be attached, and
The second step of inserting a pin for restricting inward deformation in the radial direction into the crimped portion, and
The third step of crimping the crimped portion in the axial direction to deform it radially outward and crimping it to the inner peripheral surface of the prepared hole.
A method of mounting a caulking nut is provided.

本発明によれば、取付後に破損し難くかつ緩み難いカシメナットと、このカシメナットの取り付けに好適なカシメナット用工具および取付方法を提供できる。 According to the present invention, it is possible to provide a caulking nut which is hard to be damaged and loosened after mounting, and a caulking nut tool and a mounting method suitable for mounting the caulking nut.

本発明の一実施の形態に係るカシメナットの側面図である。It is a side view of the caulking nut which concerns on one Embodiment of this invention. 図１のＡ−Ａ線矢視図である。FIG. 1 is a view taken along the line AA of FIG. カシメナット用カシメ工具の概略側面図である。It is a schematic side view of the caulking tool for a caulking nut. 被取付板のピアス孔にカシメナットのカシメ部をせん断面側から挿入した状態の側断面図である。It is a side sectional view of the state where the crimped portion of the caulking nut is inserted into the pierced hole of the attached plate from the sheared surface side. カシメナットをカシメナット用カシメ工具にセットした状態の側断面図である。It is a side sectional view of the state where the caulking nut is set in the caulking tool for caulking nut. カシメられて変形し始めた変形初期のカシメナットの側断面図である。It is a side sectional view of the caulking nut at the initial stage of deformation which was crimped and started to be deformed. 変形中期のカシメナットの側断面図である。It is a side sectional view of the caulking nut in the middle of deformation. 変形後期のカシメナットの側断面図である。It is a side sectional view of the caulking nut in the late deformation stage. 図４の姿勢から被取付板に取り付けられたカシメナットの側断面図である。It is a side sectional view of the caulking nut attached to the attached plate from the posture of FIG. 金属板に取り付けられたカシメナットの断面を示す図面代用写真である。It is a drawing substitute photograph which shows the cross section of the caulking nut attached to a metal plate. 被取付板のピアス孔にカシメナットのカシメ部を破断面側から挿入した状態の側断面図である。It is a side sectional view of the state where the caulking part of the caulking nut is inserted into the pierced hole of the attached plate from the fracture surface side. 図１１の姿勢から被取付板に取り付けられたカシメナットの側断面図である。It is a side sectional view of the caulking nut attached to the attached plate from the posture of FIG. 他の実施の形態を示すカシメナットとカシメナット用カシメ工具の側断面図である。It is a side sectional view of the caulking nut and the caulking tool for the caulking nut which show other embodiment.

以下、添付図面を参照して本発明の実施形態を説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１は、本発明に係るカシメナットの側面図である。図中一点鎖線は中心軸Ｃであり、中心軸Ｃより左側はカシメナットの断面を示す。図２はカシメナットをカシメ部側から視た図１のＡ−Ａ線矢視図である。図中の破線はナット部に形成された雌ネジの谷を表す。 FIG. 1 is a side view of the caulking nut according to the present invention. The alternate long and short dash line in the figure is the central axis C, and the left side of the central axis C shows the cross section of the caulking nut. FIG. 2 is a view taken along the line AA of FIG. 1 when the caulking nut is viewed from the caulking portion side. The broken line in the figure represents the valley of the female screw formed in the nut portion.

図１、図２及び図４に示すように、カシメナット１は、ナット部２と、ナット部２の一方の端面２ａから軸方向に延びて形成され、被取付板３の下孔４に挿入されるカシメ部５とを備える。 As shown in FIGS. 1, 2 and 4, the caulking nut 1 is formed so as to extend axially from the nut portion 2 and one end surface 2a of the nut portion 2 and is inserted into the prepared hole 4 of the attached plate 3. It is provided with a crimping portion 5.

ナット部２は、概ね六角ナットと同じ形状に形成される。具体的には、ナット部２は、六角筒状に形成されるナット本体部６と、ナット本体部６に同軸に形成されるネジ穴７とを備える。ネジ穴７の内周面には、雌ネジ７ａが形成される。また、ナット部２は、被取付板３の取付面３ａに着座される着座面８を有する。着座面８は、後述するカシメ部５から径方向外方に突出されるナット本体部６の端面２ａにて構成される。 The nut portion 2 is formed in substantially the same shape as the hexagon nut. Specifically, the nut portion 2 includes a nut main body portion 6 formed in a hexagonal tubular shape and a screw hole 7 formed coaxially with the nut main body portion 6. A female screw 7a is formed on the inner peripheral surface of the screw hole 7. Further, the nut portion 2 has a seating surface 8 that is seated on the mounting surface 3a of the plate to be mounted 3. The seating surface 8 is composed of an end surface 2a of a nut body portion 6 projecting outward in the radial direction from a caulking portion 5 described later.

カシメ部５は、筒状に形成されると共に、ナット部２の端面から中心軸Ｃの軸方向に延びて形成される。また、カシメ部５は、先端に向かうにつれて外周が縮径するテーパ状に形成される。中心軸Ｃの軸方向に対する外周面の傾斜角度θは、概ね１°以上７°以下の範囲内であればよい。なお、上述の各数値はあくまで例示であり、適宜変更可能である。また、カシメ部の形状はこれに限るものではない。カシメ部の変形例については後述する。 The crimped portion 5 is formed in a tubular shape and extends from the end surface of the nut portion 2 in the axial direction of the central axis C. Further, the crimped portion 5 is formed in a tapered shape whose outer circumference is reduced in diameter toward the tip end. The inclination angle θ of the outer peripheral surface with respect to the axial direction of the central axis C may be in the range of approximately 1 ° or more and 7 ° or less. It should be noted that each of the above numerical values is merely an example and can be changed as appropriate. Further, the shape of the crimped portion is not limited to this. A modified example of the caulked portion will be described later.

カシメ部５の基端は、ナット本体部６の二面幅ｓより小径に形成されると共に、下孔４の最も細い部分の直径φと同じ寸法に形成される。カシメ部５の先端は、直径φよりも小径に形成される。カシメ部５の内径ｄは、全長に亘って一定に形成されると共に、雌ネジ７ａの谷径Ｄ１より僅かに大きく形成される。また、カシメ部５の軸方向の長さａは、下孔４の軸方向の長さｂより長く形成される。カシメ部５は、下孔４と同じ長さｂになるまで軸方向にカシメられたとき、下孔４の内面全体に圧着され、かつ、被取付板３を変形させない程度の長さに設定される。なお、カシメ部５の基端は、二面幅ｓと同じ寸法の直径に形成されてもよい。 The base end of the crimped portion 5 is formed to have a diameter smaller than the width across flats s of the nut main body portion 6, and is formed to have the same size as the diameter φ of the thinnest portion of the prepared hole 4. The tip of the caulked portion 5 is formed to have a diameter smaller than the diameter φ. The inner diameter d of the caulked portion 5 is formed to be constant over the entire length, and is formed to be slightly larger than the valley diameter D1 of the female screw 7a. Further, the axial length a of the crimped portion 5 is formed longer than the axial length b of the prepared hole 4. When the crimped portion 5 is crimped in the axial direction until it has the same length b as the prepared hole 4, the crimped portion 5 is set to a length that is crimped to the entire inner surface of the prepared hole 4 and does not deform the attached plate 3. To. The base end of the crimped portion 5 may be formed with a diameter having the same dimension as the width across flats s.

ナット部２及びカシメ部５は、一般構造用圧延鋼材で形成される。なお、ナット部２及びカシメ部５は、一般的に六角ナットに用いられる他の材料で形成されてもよく、例えば、ステンレス鋼材で形成されてもよい。 The nut portion 2 and the caulking portion 5 are made of rolled steel for general structure. The nut portion 2 and the caulking portion 5 may be formed of other materials generally used for hexagon nuts, and may be formed of, for example, stainless steel.

また、被取付板３は、平板で構成される。なお、被取付板３は、カシメナット１の着座面８を着座させる取付面を有するものであれば他のものであってもよい。例えば、被取付板３は、車両のシャシフレーム等に用いられるチャネル材で構成されてもよい。 Further, the attached plate 3 is made of a flat plate. The mounted plate 3 may be any other as long as it has a mounting surface on which the seating surface 8 of the caulking nut 1 is seated. For example, the attached plate 3 may be made of a channel material used for a chassis frame of a vehicle or the like.

つぎに、カシメナット１を被取付板３に取り付けるためのカシメナット用カシメ工具について説明する。 Next, a caulking tool for caulking nuts for attaching the caulking nut 1 to the plate to be attached 3 will be described.

図３及び図５に示すように、カシメナット用カシメ工具１０は、カシメ部５の先端に当接されるカシメ側押圧部１１と、カシメ部５とは反対側のナット部２の端面２ｂに当接されるナット側押圧部１２と、カシメ部５の径方向内方への変形を規制すべくカシメ部５内に挿入されるピン１３と、カシメ側押圧部１１及びナット側押圧部１２を対向させて保持すると共に相対的に近接離間させる工具本体１４とを備える。 As shown in FIGS. 3 and 5, the caulking tool 10 for a caulking nut hits the caulking side pressing portion 11 that comes into contact with the tip of the caulking portion 5 and the end surface 2b of the nut portion 2 on the opposite side of the caulking portion 5. The nut-side pressing portion 12 to be contacted, the pin 13 inserted into the caulking portion 5 to regulate the inward deformation of the caulking portion 5 in the radial direction, the caulking side pressing portion 11 and the nut-side pressing portion 12 face each other. It is provided with a tool body 14 that is allowed to be held and relatively close to each other.

カシメ側押圧部１１は、カシメ部５より大径の有底円筒状に形成される。カシメ側押圧部１１には、ピン１３を出没可能に収容すると共にスプリング１５を収容するための収容穴１６が形成される。収容穴１６は、断面円形に形成されると共にカシメ側押圧部１１と同軸に形成される。また、カシメ側押圧部１１には、ピン１３の突出方向への移動を規制するための係止部１７が形成される。係止部１７は、収容穴１６の開口を縮径させるように収容穴１６の開口に臨むカシメ側押圧部１１を収容穴１６内に突出させて形成される。係止部１７が、実質的にカシメ部５を押圧する部分をなす。 The caulking side pressing portion 11 is formed in a bottomed cylindrical shape having a diameter larger than that of the caulking portion 5. The caulking side pressing portion 11 is formed with an accommodating hole 16 for accommodating the pin 13 so as to be retractable and accommodating the spring 15. The accommodating hole 16 is formed to have a circular cross section and is formed coaxially with the caulking side pressing portion 11. Further, the caulking side pressing portion 11 is formed with a locking portion 17 for restricting the movement of the pin 13 in the protruding direction. The locking portion 17 is formed by projecting a caulking side pressing portion 11 facing the opening of the accommodating hole 16 into the accommodating hole 16 so as to reduce the diameter of the opening of the accommodating hole 16. The locking portion 17 substantially forms a portion that presses the crimped portion 5.

ピン１３は、カシメ側押圧部１１に出没自在に設けられる。ピン１３は、概ね円柱状に形成される挿入部１３ａと、挿入部１３ａの一端に設けられ係止部１７に係止される被係止部１３ｂとを備える。 The pin 13 is provided on the crimping side pressing portion 11 so as to freely appear and disappear. The pin 13 includes an insertion portion 13a formed in a substantially columnar shape, and a locked portion 13b provided at one end of the insertion portion 13a and locked to the locking portion 17.

挿入部１３ａは、基端を収容穴１６内に挿入されると共に先端を収容穴１６外に突出される。挿入部１３ａの先端部は、若干先細となるように形成されると共に、角を丸めて形成される。これにより、カシメ部５内にピン１３を容易に挿入させることができると共に、カシメた後のカシメ部５内からピン１３を容易に抜くことができる。また、挿入部１３ａの基端側は、係止部１７の内周面に摺接するように形成される。これにより、挿入部１３ａは、係止部１７に径方向の移動を規制され、軸方向に正確に案内される。 The insertion portion 13a has its base end inserted into the accommodating hole 16 and its tip protruding out of the accommodating hole 16. The tip of the insertion portion 13a is formed so as to be slightly tapered and the corners are rounded. As a result, the pin 13 can be easily inserted into the crimped portion 5, and the pin 13 can be easily pulled out from the crimped portion 5 after caulking. Further, the base end side of the insertion portion 13a is formed so as to be in sliding contact with the inner peripheral surface of the locking portion 17. As a result, the insertion portion 13a is restricted from moving in the radial direction by the locking portion 17, and is accurately guided in the axial direction.

被係止部１３ｂは、挿入部１３ａから径方向外方に突起して形成される。具体的には、被係止部１３ｂは、挿入部１３ａの基端を拡径させて形成される。また、被係止部１３ｂは、収容穴１６の内周面に摺接するように形成される。これにより、被係止部１３ｂは、径方向の移動を規制され、軸方向に正確に案内される。なお、ピン１３には、カシメ部５との圧着や凝着を防ぐための表面処理が施されてもよい。具体的には、表面処理は、物理蒸着法又は化学蒸着法によって施されるとよい。この場合、表面処理によって形成される被膜は、窒化チタン、窒化クロム等の高い摺動性と硬度を有する材料で構成されるとよい。 The locked portion 13b is formed so as to project radially outward from the insertion portion 13a. Specifically, the locked portion 13b is formed by expanding the diameter of the base end of the insertion portion 13a. Further, the locked portion 13b is formed so as to be in sliding contact with the inner peripheral surface of the accommodating hole 16. As a result, the locked portion 13b is restricted from moving in the radial direction and is accurately guided in the axial direction. The pin 13 may be surface-treated to prevent pressure bonding and adhesion with the crimped portion 5. Specifically, the surface treatment may be performed by a physical vapor deposition method or a chemical vapor deposition method. In this case, the film formed by the surface treatment may be made of a material having high slidability and hardness such as titanium nitride and chromium nitride.

スプリング１５はコイルバネで構成される。スプリング１５は、収容穴１６の底面１６ａとピン１３との間に設けられる。スプリング１５は、ピン１３を収容穴１６から突出させる方向に付勢する。なお、スプリング１５はコイルバネに限るものではない。例えばスプリング１５は、エアスプリングであってもよく、他のタイプのスプリングであってもよい。 The spring 15 is composed of a coil spring. The spring 15 is provided between the bottom surface 16a of the accommodating hole 16 and the pin 13. The spring 15 urges the pin 13 to protrude from the accommodating hole 16. The spring 15 is not limited to the coil spring. For example, the spring 15 may be an air spring or another type of spring.

ナット側押圧部１２は、ナット部２より大径の円柱状に形成される。 The nut side pressing portion 12 is formed in a columnar shape having a diameter larger than that of the nut portion 2.

工具本体１４は、概ねＣ字状に形成されるアーム部１８と、アーム部１８の内周側に設けられナット側押圧部１２を保持する固定側保持部１９と、アーム部１８の内周側に出没自在に設けられカシメ側押圧部１１を保持する可動側保持部２０と、アーム部１８に設けられ可動側保持部２０を駆動させる駆動部２１とを備える。 The tool body 14 includes an arm portion 18 formed in a substantially C shape, a fixed side holding portion 19 provided on the inner peripheral side of the arm portion 18 to hold the nut side pressing portion 12, and an inner peripheral side of the arm portion 18. A movable side holding portion 20 provided on the arm portion 18 to hold the crimped side pressing portion 11 and a driving portion 21 provided on the arm portion 18 for driving the movable side holding portion 20 are provided.

固定側保持部１９は、チャックで構成され、複数種類の大きさのナット側押圧部１２を着脱可能に保持する。 The fixed side holding portion 19 is composed of a chuck, and holds nut side pressing portions 12 having a plurality of sizes in a detachable manner.

可動側保持部２０は、チャックで構成され、複数種類の大きさのカシメ側押圧部１１を着脱可能に保持する。また、可動側保持部２０は、固定側保持部１９に対向して配置される。 The movable side holding portion 20 is composed of a chuck, and holds the caulking side pressing portions 11 having a plurality of sizes in a detachable manner. Further, the movable side holding portion 20 is arranged so as to face the fixed side holding portion 19.

駆動部２１は、可動側保持部２０を固定側保持部１９に対して近接離間させる方向に駆動させる。また、駆動部２１には、可動側保持部２０を固定側保持部１９側に駆動させているとき反力を検出する機能と、予め設定されたしきい値より大きな反力を検出したとき可動側保持部２０の駆動方向を反転させる機能とが備えられる。ここでしきい値は、例えばカシメ側押圧部１１が被取付板３に当接したときの反力と等しく設定される。この反力の値は、予め計算或いは実験等で求められ、駆動部２１に設定されている。すなわち、駆動部２１は、カシメナット１をカシメているときに反力を逐次検出し、検出される反力が予め設定されたしきい値以上に増大したとき可動側保持部２０の駆動方向を反転させて可動側保持部２０を固定側保持部１９から離間させる。 The drive unit 21 drives the movable side holding unit 20 in a direction in which the movable side holding unit 20 is brought close to and separated from the fixed side holding unit 19. Further, the drive unit 21 has a function of detecting a reaction force when the movable side holding unit 20 is driven toward the fixed side holding unit 19, and is movable when a reaction force larger than a preset threshold value is detected. It is provided with a function of reversing the driving direction of the side holding portion 20. Here, the threshold value is set equal to, for example, the reaction force when the crimped side pressing portion 11 comes into contact with the attached plate 3. The value of this reaction force is obtained in advance by calculation or experiment, and is set in the drive unit 21. That is, the drive unit 21 sequentially detects the reaction force when the caulking nut 1 is caulked, and reverses the drive direction of the movable side holding unit 20 when the detected reaction force increases above a preset threshold value. The movable side holding portion 20 is separated from the fixed side holding portion 19.

また、工具本体１４は、図示しないバランサー又はホイスト等に吊り下げられており、被取付板３の下孔４の位置に自由に移動可能となっている。また、工具本体１４には、電源コード２２が接続されている。電源コード２２は駆動部２１に電源を供給する。なお、駆動部２１は電動式に限るものではない。例えば、油圧で駆動される油圧式であってもよく、他の方式で駆動されるものであってもよい。 Further, the tool body 14 is suspended by a balancer, a hoist, or the like (not shown), and can be freely moved to the position of the prepared hole 4 of the attached plate 3. A power cord 22 is connected to the tool body 14. The power cord 22 supplies power to the drive unit 21. The drive unit 21 is not limited to the electric type. For example, it may be a hydraulic type driven by a hydraulic system, or may be driven by another method.

次にカシメナット１の取付方法について説明する。 Next, a method of attaching the caulking nut 1 will be described.

被取付板３にカシメナット１を取り付ける場合、予め工具本体１４にナット側押圧部１２とカシメ側押圧部１１を取り付けておく。 When the caulking nut 1 is attached to the plate to be attached 3, the nut side pressing portion 12 and the caulking side pressing portion 11 are attached to the tool body 14 in advance.

図４に示すように、まず、被取付板３にプレス加工にて下孔４（ピアス孔）を形成する。このとき、プレス加工用のパンチ（図示せず）と対向する面側（せん断面２３側）では、孔縁にダレ（孔縁が全周に亘って凹む現象）が発生する。また、被取付板３を貫通したパンチが抜け出る面側（破断面２４側）では、孔径の拡大が発生する。 As shown in FIG. 4, first, a pilot hole 4 (pierced hole) is formed in the attached plate 3 by press working. At this time, on the surface side (shear surface 23 side) facing the punch for press working (not shown), sagging (a phenomenon in which the hole edge is dented over the entire circumference) occurs at the hole edge. Further, the hole diameter is enlarged on the surface side (the fracture surface 24 side) from which the punch penetrating the attached plate 3 comes out.

次に、被取付板３の下孔４内にカシメナット１のカシメ部５を挿入する。このとき、カシメ部５は、下孔４のせん断面２３側及び破断面２４側のいずれから挿入してもよいが、説明の便宜上、まずはせん断面２３側から挿入した場合について説明する。 Next, the caulking portion 5 of the caulking nut 1 is inserted into the prepared hole 4 of the attached plate 3. At this time, the caulking portion 5 may be inserted from either the sheared surface 23 side or the fracture surface 24 side of the prepared hole 4, but for convenience of explanation, the case where the caulked portion 5 is inserted from the sheared surface 23 side will be described first.

下孔４内にカシメ部５が挿入されると、ナット部２の着座面８が被取付板３の取付面３ａであるせん断面２３に当接される。これにより、被取付板３に対するカシメナット１の軸方向の位置が決まる。またこのとき、カシメ部５の先端部は下孔４を貫通して下孔４から突出される。また、下孔４の破断面２４側内周面２５とカシメ部５との間には、全周に亘って間隙が形成される。 When the crimped portion 5 is inserted into the prepared hole 4, the seating surface 8 of the nut portion 2 comes into contact with the sheared surface 23 which is the mounting surface 3a of the mounted plate 3. As a result, the axial position of the caulking nut 1 with respect to the attached plate 3 is determined. At this time, the tip of the crimped portion 5 penetrates the prepared hole 4 and protrudes from the prepared hole 4. Further, a gap is formed over the entire circumference between the inner peripheral surface 25 on the fracture surface 24 side of the prepared hole 4 and the crimped portion 5.

図５に示すように、この後、カシメナット１を下孔４内に挿入させた姿勢のままカシメナット用カシメ工具にセットする。具体的には、予め工具本体１４に取り付けられているナット側押圧部１２及びカシメ側押圧部１１の間にカシメナット１を挿入し、着座面８とは反対側のナット部２の端面２ｂをナット側押圧部１２に当接させる。この後、工具本体１４を駆動させてカシメ側押圧部１１をカシメ部５の先端に接近させる。これにより図５に示す如く、カシメ部５内にピン１３が挿入され、カシメ側押圧部１１がカシメ部５の先端に当接される。 As shown in FIG. 5, after that, the caulking nut 1 is set in the caulking tool for caulking nuts in the posture of being inserted into the prepared hole 4. Specifically, the caulking nut 1 is inserted between the nut-side pressing portion 12 and the caulking-side pressing portion 11 attached to the tool body 14 in advance, and the end surface 2b of the nut portion 2 on the side opposite to the seating surface 8 is nutted. It is brought into contact with the side pressing portion 12. After that, the tool body 14 is driven to bring the crimping side pressing portion 11 closer to the tip of the crimping portion 5. As a result, as shown in FIG. 5, the pin 13 is inserted into the crimped portion 5, and the crimped side pressing portion 11 is brought into contact with the tip of the crimped portion 5.

この後さらに工具本体１４を駆動させてカシメ側押圧部１１をナット側押圧部１２に接近させる。これにより、カシメナット１は、カシメ側押圧部１１とナット側押圧部１２とによって軸方向に圧縮され、カシメられる。 After that, the tool body 14 is further driven to bring the caulking side pressing portion 11 closer to the nut side pressing portion 12. As a result, the caulking nut 1 is compressed in the axial direction by the caulking side pressing portion 11 and the nut side pressing portion 12, and is caulked.

図６に示すように、カシメ部５には、内面５ａに沿う軸方向の力Ｆａが負荷されると共に、外面５ｂに沿う傾斜方向の力Ｆｂが負荷される。また、カシメ部５は、ピン１３によって径方向内方への変形を規制される。このため、カシメ部５に生じた軸方向の圧縮力Ｆａと傾斜方向の圧縮力Ｆｂは、カシメ部５の基端部に集中して合わさり、カシメ部５の基端部を径方向外方に変形させる力Ｆｃとして作用する。これにより、カシメ部５は、軸方向に潰れつつ基端部を拡径させるように座屈変形する。 As shown in FIG. 6, the crimped portion 5 is loaded with an axial force Fa along the inner surface 5a and an inclined force Fb along the outer surface 5b. Further, the caulking portion 5 is restricted from being deformed inward in the radial direction by the pin 13. Therefore, the axial compressive force Fa and the inclined compressive force Fb generated in the crimped portion 5 are concentrated and combined with each other at the base end portion of the crimped portion 5, and the base end portion of the crimped portion 5 is moved outward in the radial direction. Deforming force Acts as Fc. As a result, the crimped portion 5 buckles and deforms so as to expand the diameter of the base end portion while being crushed in the axial direction.

拡径された基端部は下孔４の内周面２５を構成する被取付板３に強固に圧着され拡径方向の変形を規制される。このとき、被取付板３はほとんど変形することはなく、拡径されたカシメ部５から被取付板３に作用される力Ｆｃは、カシメ部５を被取付板３に圧着させる力として効率よく用いられる。基端部の座屈変形が被取付板３によって完全に規制されると、図７に示すように、力Ｆｃによって座屈変形する箇所が基端部から先端側に移動される。この後、座屈変形する箇所は基端部から順次先端側に移動される。これにより、カシメ部５は基端部から順に被取付板３に圧着される。 The diameter-expanded base end portion is firmly crimped to the attached plate 3 constituting the inner peripheral surface 25 of the prepared hole 4, and deformation in the diameter-expanding direction is restricted. At this time, the attached plate 3 is hardly deformed, and the force Fc acted on the attached plate 3 from the enlarged diameter crimped portion 5 efficiently acts as a force for crimping the caulked portion 5 to the attached plate 3. Used. When the buckling deformation of the base end portion is completely regulated by the attached plate 3, as shown in FIG. 7, the buckling deformation portion is moved from the base end portion to the tip side by the force Fc. After that, the buckling-deformed portion is sequentially moved from the base end portion to the tip end side. As a result, the crimped portion 5 is crimped to the attached plate 3 in order from the base end portion.

図８に示すように、駆動部２１（図３参照）は、カシメ側押圧部１１が被取付板３に当接して被取付板３からしきい値以上の反力を受けると、これを検出し、駆動方向を反転させる。すなわち、駆動部２１は、カシメ側押圧部１１をナット側押圧部１２から離間させる方向に移動させる。これにより、カシメナット１は、カシメ側押圧部１１及びナット側押圧部１２から離脱される。 As shown in FIG. 8, the drive unit 21 (see FIG. 3) detects when the caulking side pressing unit 11 comes into contact with the mounted plate 3 and receives a reaction force equal to or higher than the threshold value from the mounted plate 3. And reverse the drive direction. That is, the drive unit 21 moves the caulking side pressing unit 11 in a direction away from the nut side pressing unit 12. As a result, the caulking nut 1 is separated from the caulking side pressing portion 11 and the nut side pressing portion 12.

図９に示すように、被取付板３に取り付けられたカシメナット１は、カシメ部５を軸方向に潰されると共に拡径されて下孔４の内周面２５に強固に圧着される。またさらに、下孔４の直径は、せん断面２３側より破断面２４側が大きい。このため、破断面２４側のカシメ部５は、せん断面２３側のカシメ部５より大径となり、カシメナット１の抜け止めとして好適に機能すると共に、着座面８との間で被取付板３の一部を挟んでカシメナット１を被取付板３に強固に固定させる。 As shown in FIG. 9, the caulking nut 1 attached to the attached plate 3 is crushed in the axial direction and expanded in diameter, and is firmly crimped to the inner peripheral surface 25 of the prepared hole 4. Furthermore, the diameter of the prepared hole 4 is larger on the fracture surface 24 side than on the sheared surface 23 side. Therefore, the crimped portion 5 on the fracture surface 24 side has a larger diameter than the crimped portion 5 on the sheared surface 23 side, and functions suitably as a stopper for the caulking nut 1, and the mounted plate 3 is connected to the seating surface 8. The caulking nut 1 is firmly fixed to the attached plate 3 with a part sandwiched between them.

図１０は、実験用に模したカシメナットを上述の方法で金属板に取り付け、その断面を撮影したものである。金属板は、実験用に被取付板３を模したものである。金属板は、被取付板３と同じ材料、同じ厚さに形成されている。図１０に示す通り、上述の方法によれば、カシメナットは下孔４の内周面に隙間無く圧着されることが解る。 FIG. 10 is a photograph of a cross section of a caulking nut imitated for an experiment attached to a metal plate by the method described above. The metal plate imitates the attached plate 3 for experiments. The metal plate is formed of the same material and the same thickness as the attached plate 3. As shown in FIG. 10, according to the above method, it can be seen that the caulking nut is crimped to the inner peripheral surface of the prepared hole 4 without a gap.

なお、下孔４は、プレス加工にて形成されるものとしたが、これに限るものではない。例えば下孔４は、ドリル加工にて形成されてもよく、他の加工方法で形成されてもよい。 The pilot hole 4 is formed by press working, but is not limited to this. For example, the prepared hole 4 may be formed by drilling or may be formed by another processing method.

このように、カシメナット１は、ネジ穴７が形成されたナット部２と、下孔４の内周面２５に圧着させるべくナット部２の端面から軸方向に延びて形成されたカシメ部５とを備え、ナット部２は、被取付板３の取付面３ａに着座される着座面８を有し、カシメ部５は、筒状に形成されると共に先端に向かうにつれて外周が縮径するテーパ状に形成されるものとした。このため、下孔４の内周面２５に広い面積でカシメ部５を圧着させることができ、取付後に破損し難くかつ緩み難いカシメナットを提供できる。 As described above, the caulking nut 1 includes the nut portion 2 in which the screw hole 7 is formed and the caulking portion 5 formed so as to extend axially from the end surface of the nut portion 2 so as to be crimped to the inner peripheral surface 25 of the prepared hole 4. The nut portion 2 has a seating surface 8 seated on the mounting surface 3a of the plate to be mounted 3, and the caulking portion 5 has a tapered shape in which the outer circumference is reduced toward the tip while being formed in a tubular shape. It was supposed to be formed in. Therefore, the caulking portion 5 can be crimped to the inner peripheral surface 25 of the prepared hole 4 in a wide area, and a caulking nut that is hard to be damaged and loosened after mounting can be provided.

そして、特許文献１記載のカシメナットでは、耐トルク性上、小型（Ｍ８以下）のナットが対象となるが、本実施の形態に係るカシメナット１は、小型に限ることなく大型（Ｍ８より大）のナットでも被取付板３に強固に取り付けることができる。 The caulking nut described in Patent Document 1 is intended for a small nut (M8 or less) in terms of torque resistance, but the caulking nut 1 according to the present embodiment is not limited to a small size but is a large size (larger than M8). Even a nut can be firmly attached to the attached plate 3.

また、特許文献２記載の圧入ナットは、パネルが圧入により変形して圧入ナットのナット固定部の凹凸に入り込むことを前提としており、柔らかく薄いパネルを取付対象とする。このため、仮に中板で構成される被取付板３の下孔４に圧入ナットのナット固定部を圧入した場合、被取付板３が厚すぎ、被取付板３の材料を変形させてナット固定部の凹凸に入り込ませるのは困難である。しかし、本実施の形態に係るカシメナット１は、中板で構成される被取付板３であっても被取付板３を変形させることなくカシメナット自身が変形して被取付板３に圧着される。このため、本実施の形態に係るカシメナット１は、被取付板３の厚さや硬さに応じて材料やカシメ部５の寸法を適宜変更することで被取付板３に対する圧着力をコントロールできる。そして、本実施の形態に係るカシメナット１は、様々な厚さや硬さの被取付板３に強固に取り付けることができる。 Further, the press-fitting nut described in Patent Document 2 is based on the premise that the panel is deformed by press-fitting and enters the unevenness of the nut fixing portion of the press-fitting nut, and a soft and thin panel is to be mounted. Therefore, if the nut fixing portion of the press-fitting nut is press-fitted into the prepared hole 4 of the mounted plate 3 composed of the middle plate, the mounted plate 3 is too thick and the material of the mounted plate 3 is deformed to fix the nut. It is difficult to get into the unevenness of the part. However, in the caulking nut 1 according to the present embodiment, even if the attached plate 3 is composed of the middle plate, the caulking nut itself is deformed and crimped to the attached plate 3 without deforming the attached plate 3. Therefore, in the caulking nut 1 according to the present embodiment, the crimping force against the attached plate 3 can be controlled by appropriately changing the material and the dimensions of the caulked portion 5 according to the thickness and hardness of the attached plate 3. Then, the caulking nut 1 according to the present embodiment can be firmly attached to the attached plate 3 having various thicknesses and hardnesses.

また、カシメナット用カシメ工具１０は、カシメ部５の先端に当接されるカシメ側押圧部１１と、カシメ部５とは反対側のナット部２の端面２ｂに当接されるナット側押圧部１２と、カシメ部５の径方向内方への変形を規制すべくカシメ部５内に挿入されるピン１３と、カシメ側押圧部１１及びナット側押圧部１２を、対向させて保持すると共に、ナット側押圧部１２に対してカシメ側押圧部１１を近接離間させる工具本体１４とを備えるものとした。このため、被取付板３にカシメナット１を簡易な構造の工具で容易に取り付けることができる。 Further, in the crimping nut caulking tool 10, the crimping side pressing portion 11 that abuts on the tip of the caulking portion 5 and the nut side pressing portion 12 that abuts on the end surface 2b of the nut portion 2 on the opposite side of the caulking portion 5. The pin 13 inserted into the caulking portion 5 to regulate the inward deformation of the caulking portion 5 in the radial direction, the caulking side pressing portion 11 and the nut side pressing portion 12 are held facing each other, and the nut is held. A tool body 14 for separating the caulking side pressing portion 11 from the side pressing portion 12 in close proximity to the side pressing portion 12 is provided. Therefore, the caulking nut 1 can be easily attached to the attached plate 3 with a tool having a simple structure.

また、ピン１３は、カシメ側押圧部１１に出没自在に設けられるものとしたため、部品点数を減らすことができ、カシメナット用カシメ工具１０を簡易にできる。 Further, since the pin 13 is provided on the crimping side pressing portion 11 so as to freely appear and disappear, the number of parts can be reduced and the caulking tool 10 for caulking nut can be simplified.

また、カシメ側押圧部１１には、ピン１３を突出方向に付勢するスプリング１５が設けられるため、ピン１３を別途駆動する必要がなく、カシメナット用カシメ工具１０を簡易にできる。 Further, since the crimping side pressing portion 11 is provided with a spring 15 for urging the pin 13 in the protruding direction, it is not necessary to separately drive the pin 13, and the caulking tool 10 for the caulking nut can be simplified.

また、カシメナット１の取付方法は、カシメナット１のカシメ部５を被取付板３の下孔４内に挿入し、カシメ部５内に、径方向内方への変形を規制するためのピン１３を挿入し、カシメ部５を、軸方向にカシメることで径方向外方に変形させて下孔４の内周面２５に圧着させるものとした。このため、被取付板３にカシメナット１を溶接によることなく取り付けることができる。 Further, as a method of mounting the caulking nut 1, the caulking portion 5 of the caulking nut 1 is inserted into the prepared hole 4 of the plate to be mounted 3, and a pin 13 for restricting inward deformation in the radial direction is inserted in the caulking portion 5. The crimped portion 5 was inserted and crimped in the axial direction to be deformed radially outward and crimped to the inner peripheral surface 25 of the prepared hole 4. Therefore, the caulking nut 1 can be attached to the attached plate 3 without welding.

以上、本発明の実施形態を詳細に述べたが、本発明は以下のような他の実施形態も可能である。 Although the embodiments of the present invention have been described in detail above, the present invention can also have other embodiments as follows.

（１）上述の実施の形態では、下孔４内にカシメ部５をせん断面２３側から挿入する場合について説明したが、これに限るものではない。図１１に示すように、カシメ部５は、破断面２４側から下孔４に挿入されてもよい。図１２に示すように、破断面２４側から下孔４に挿入されたカシメナット１を上述と同様の方法でカシメると、カシメ部５は、上述の実施の形態と同様に軸方向に潰されると共に拡径されて下孔４の内周面２５に強固に圧着される。またさらに、拡径されたカシメ部５は、せん断面２３側の孔縁のダレにも入り込む。ダレに入り込んだカシメ部５は、カシメナット１の抜け止めとして機能する。 (1) In the above-described embodiment, the case where the caulking portion 5 is inserted into the prepared hole 4 from the sheared surface 23 side has been described, but the present invention is not limited to this. As shown in FIG. 11, the caulked portion 5 may be inserted into the prepared hole 4 from the fracture surface 24 side. As shown in FIG. 12, when the caulking nut 1 inserted into the prepared hole 4 from the fracture surface 24 side is caulked by the same method as described above, the caulking portion 5 is crushed in the axial direction as in the above-described embodiment. At the same time, the diameter is expanded and the inner peripheral surface 25 of the prepared hole 4 is firmly crimped. Further, the caulked portion 5 whose diameter has been expanded also enters the sagging of the hole edge on the sheared surface 23 side. The caulking portion 5 that has entered the sagging function as a stopper for the caulking nut 1.

（２）カシメナット１のナット部２は、概ね六角ナットと同じ外形状に形成されるものとしたが、これに限るものではない。ナット部２の外形状は、円形であってもよく、他の形状であってもよい。 (2) The nut portion 2 of the caulking nut 1 is formed to have substantially the same outer shape as the hexagon nut, but the present invention is not limited to this. The outer shape of the nut portion 2 may be circular or another shape.

（３）工具本体１４はプレス機であってもよい。この場合、複数組のカシメ側押圧部１１及びナット側押圧部１２が工具本体１４たるプレス機に設けられるとよい。これにより、一回のプレスで複数のカシメナット１を取り付けることができる。 (3) The tool body 14 may be a press machine. In this case, it is preferable that a plurality of sets of the crimping side pressing portion 11 and the nut side pressing portion 12 are provided in the press machine which is the tool body 14. As a result, a plurality of caulking nuts 1 can be attached with one press.

（４）駆動部２１は、しきい値を変更可能に記憶する機能を備えてもよい。しきい値固定の駆動部２１は、安価に得られる反面、被取付板３の厚さや硬さが変更になった場合、他の駆動部２１に変更しなければならない可能性がある。しかし、しきい値可変の駆動部２１は、被取付板３の厚さや硬さに応じてしきい値を変更することで様々な厚さや硬さの被取付板３に対応できる。 (4) The drive unit 21 may have a function of storing the threshold value in a changeable manner. The drive unit 21 having a fixed threshold value can be obtained at low cost, but on the other hand, if the thickness or hardness of the attached plate 3 is changed, it may be necessary to change to another drive unit 21. However, the drive unit 21 having a variable threshold value can correspond to the mounted plate 3 having various thicknesses and hardnesses by changing the threshold value according to the thickness and hardness of the mounted plate 3.

（５）カシメ部５は、筒状に形成されると共に先端に向かうにつれて外周が縮径するテーパ状に形成されるものとしたが、これに限るものではない。図１３に示すように、カシメナット３０のカシメ部３１は、筒状に形成されると共に先端に向かうにつれて内周が拡径するテーパ状に形成されるものであってもよい。この場合、カシメ部３１の内周面の傾斜角度θ’は、概ね１°以上７°以下の範囲内に設定されるとよい。また、カシメナット用カシメ工具３２のピン３３は、一端に設けられ係止部１７に係止される被係止部１３ｂと、被係止部１３ｂから他端に向かうにつれて外周が縮径するテーパ状に形成された挿入部３４とを備えることが好ましい。挿入部３４の外周面は、カシメ部３１内に挿入されたとき、カシメ部３１の内周面に沿うように形成されるとよい。 (5) The crimped portion 5 is formed in a tubular shape and is formed in a tapered shape whose outer circumference is reduced in diameter toward the tip, but the present invention is not limited to this. As shown in FIG. 13, the caulked portion 31 of the caulking nut 30 may be formed in a tubular shape and may be formed in a tapered shape whose inner circumference expands toward the tip. In this case, the inclination angle θ'of the inner peripheral surface of the crimped portion 31 may be set within a range of approximately 1 ° or more and 7 ° or less. Further, the pin 33 of the caulking tool 32 for caulking nut has a tapered shape in which the outer circumference is reduced from the locked portion 13b to the other end and the locked portion 13b provided at one end and locked to the locking portion 17. It is preferable to include an insertion portion 34 formed in. The outer peripheral surface of the insertion portion 34 may be formed along the inner peripheral surface of the caulking portion 31 when inserted into the caulking portion 31.

このように、カシメ部３１は、筒状に形成されると共に先端に向かうにつれて内周が拡径するテーパ状に形成されるものであっても、上述と同様の方法で軸方向に圧縮させることで径方向外方に変形させることができる。そして、下孔４の内周面２５に広い面積でカシメ部３１を圧着させることができる。 As described above, even if the crimped portion 31 is formed in a tubular shape and has a tapered shape whose inner circumference expands toward the tip, it is compressed in the axial direction by the same method as described above. Can be deformed outward in the radial direction with. Then, the crimped portion 31 can be crimped to the inner peripheral surface 25 of the prepared hole 4 over a wide area.

前述の各実施形態の構成は、特に矛盾が無い限り、部分的にまたは全体的に組み合わせることが可能である。本発明の実施形態は前述の実施形態のみに限らず、特許請求の範囲によって規定される本発明の思想に包含されるあらゆる変形例や応用例、均等物が本発明に含まれる。従って本発明は、限定的に解釈されるべきではなく、本発明の思想の範囲内に帰属する他の任意の技術にも適用することが可能である。 The configurations of each of the above embodiments can be combined partially or wholly, unless otherwise inconsistent. The embodiment of the present invention is not limited to the above-described embodiment, and all modifications, applications, and equivalents included in the idea of the present invention defined by the scope of claims are included in the present invention. Therefore, the present invention should not be construed in a limited manner and can be applied to any other technique belonging to the scope of the idea of the present invention.

１ カシメナット
２ ナット部
２ａ 端面
３ 被取付板
３ａ 取付面
４ 下孔
５ カシメ部
７ ネジ穴
８ 着座面
２５ 内周面
３０ カシメナット
３１ カシメ部 1 Caulking nut 2 Nut part 2a End surface 3 Mounted plate 3a Mounting surface 4 Pilot hole 5 Caulking part 7 Screw hole 8 Seating surface 25 Inner peripheral surface 30 Caulking nut 31 Caulking part

Claims (6)

被取付板の下孔に取り付けるためのカシメナットであって、
ネジ穴が形成されたナット部と、
前記下孔の内周面に圧着させるべく前記ナット部の端面から軸方向に延びて形成されたカシメ部とを備え、
前記ナット部は、前記被取付板の取付面に着座される着座面を有し、
前記カシメ部は、筒状に形成されると共に先端に向かうにつれて外周が縮径または内径が拡径するテーパ状に形成され、
前記ネジ穴の軸方向の先端は、前記着座面よりも軸方向基端側に位置される
ことを特徴とするカシメナット。 A caulking nut for mounting in the prepared hole of the plate to be mounted.
The nut part with the screw hole and
It is provided with a caulking portion formed so as to extend in the axial direction from the end surface of the nut portion so as to be crimped to the inner peripheral surface of the prepared hole.
The nut portion has a seating surface that is seated on the mounting surface of the plate to be mounted.
The crimped portion is formed in a tubular shape, and is formed in a tapered shape in which the outer diameter is reduced or the inner diameter is increased toward the tip .
A caulking nut characterized in that the axial tip of the screw hole is located on the axial proximal side with respect to the seating surface. 前記カシメ部は、前記下孔より軸方向に長く形成された
ことを特徴とする請求項１に記載のカシメナット。 The caulking nut according to claim 1, wherein the caulking portion is formed longer in the axial direction than the prepared hole. 請求項１又は２に記載のカシメナットを被取付板の下孔に取り付けるためのカシメナット用カシメ工具であって、
前記カシメ部の先端に当接されるカシメ側押圧部と、
前記カシメ部とは反対側の前記ナット部の端面に当接されるナット側押圧部と、
前記カシメ部の径方向内方への変形を規制すべく前記カシメ部内に挿入されるピンと、
前記カシメ側押圧部及び前記ナット側押圧部を、対向させて保持すると共に、相対的に近接離間させる工具本体と、
を備えたことを特徴とするカシメナット用カシメ工具。 A caulking tool for caulking nuts for attaching the caulking nut according to claim 1 or 2 to a pilot hole of a plate to be attached.
The crimped side pressing portion that comes into contact with the tip of the crimped portion,
A nut-side pressing portion that comes into contact with the end surface of the nut portion on the side opposite to the crimped portion,
A pin inserted into the crimped portion to regulate inward deformation of the crimped portion in the radial direction,
A tool body that holds the crimped side pressing portion and the nut side pressing portion so as to face each other and keeps them relatively close to each other.
A caulking tool for caulking nuts, which is characterized by being equipped with. 前記ピンは、前記カシメ側押圧部に出没自在に設けられたことを特徴とする請求項３に記載のカシメナット用カシメ工具。 The caulking tool for a caulking nut according to claim 3, wherein the pin is provided on the caulking side pressing portion so as to be freely retractable. 前記カシメ側押圧部には、前記ピンを突出方向に付勢するスプリングが設けられたことを特徴とする請求項４に記載のカシメナット用カシメ工具。 The caulking tool for a caulking nut according to claim 4, wherein the caulking side pressing portion is provided with a spring for urging the pin in the projecting direction. カシメナットを被取付板の下孔に取り付けるための取付方法であって、
前記カシメナットは、ネジ穴が形成されたナット部と、前記下孔の内周面に圧着させるべく前記ナット部の端面から軸方向に延びて形成されたカシメ部とを備え、
前記ナット部は、前記被取付板の取付面に着座される着座面を有し、
前記カシメ部は、筒状に形成されると共に先端に向かうにつれて外周が縮径または内径が拡径するテーパ状に形成され、
前記取付方法は、
前記カシメナットのカシメ部を被取付板の下孔内に挿入する第１ステップと、
前記カシメ部内に、径方向内方への変形を規制するためのピンを挿入する第２ステップと、
前記カシメ部を、軸方向にカシメることで径方向外方に変形させて前記下孔の内周面に圧着させる第３ステップと、
を備えることを特徴とするカシメナットの取付方法。 It is a mounting method for mounting the caulking nut in the prepared hole of the plate to be mounted.
The caulking nut includes a nut portion having a screw hole and a caulking portion formed so as to extend axially from an end surface of the nut portion so as to be crimped to the inner peripheral surface of the prepared hole.
The nut portion has a seating surface that is seated on the mounting surface of the plate to be mounted.
The crimped portion is formed in a tubular shape, and is formed in a tapered shape in which the outer diameter is reduced or the inner diameter is increased toward the tip.
The mounting method is
The first step of inserting the crimped portion of the caulking nut into the prepared hole of the plate to be attached, and
The second step of inserting a pin for restricting inward deformation in the radial direction into the crimped portion, and
The third step of crimping the crimped portion in the axial direction to deform it radially outward and crimping it to the inner peripheral surface of the prepared hole.
A method of mounting a caulking nut, which is characterized by being provided with.
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