JP2010249305A - Fixing tool and fixing method for fixing tool with jig - Google Patents

Fixing tool and fixing method for fixing tool with jig Download PDF

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JP2010249305A
JP2010249305A JP2009114962A JP2009114962A JP2010249305A JP 2010249305 A JP2010249305 A JP 2010249305A JP 2009114962 A JP2009114962 A JP 2009114962A JP 2009114962 A JP2009114962 A JP 2009114962A JP 2010249305 A JP2010249305 A JP 2010249305A
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sheet metal
fixing tool
jig
hole
main body
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JP4453095B1 (en
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Hiroshi Akaha
廣志 赤羽
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing tool capable of fixing the fixing tool even if the board thickness of a sheet metal is less than 0.8 mm and the fixing method for a jig with the fixing tool. <P>SOLUTION: A sheet metal 6 is placed on the jig 10 and the main part 2 of the fixing tool 1 is inserted in the hole 11 of the jig 10 through a lower hole 7 of the sheet metal 6, and it is in the state where the large diameter part 3 is placed on the sheet metal 6 since the outer diameter of the large diameter part 3 is larger than the lower hole 7 of the sheet metal 6 and the large diameter part 3 of the fixing tool 1 is press fit in the lower hole 7 of the sheet metal 6 by the hammer which is not illustrated. The convex part of a concavoconvex streak of the knurling shape on the outer circumferential face of the large diameter part 3 of the fixing tool 1 bites into the inner circumferential part of the lower hole 7 of the sheet metal 6 in that case, which is in the state where the thickness of the sheet metal 6 gears into the concave part mutually and also the inner circumferential part of the lower hole 7, which the convex part is bitten and is bitten off downwards, is fixed by the chamfering part 12 on the jig 10 in the state that the small diameter part 4 of the fixing tool 1 bites. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、例えば携帯電話機等に用いられるステンレス鋼等の板金に圧入して固定する固着具と冶具と固着具の固定方法に関する。  The present invention relates to a fixing tool, a jig, and a fixing method of the fixing tool that are press-fitted into and fixed to a sheet metal such as stainless steel used in, for example, a mobile phone.

従来、引張荷重とトルク負荷に耐えて薄板（板金）との接合を確実に行って圧入するファスナーとも呼ばれるナット状の金属製固着具が実用化されている。このようなナット状の金属製固着具を取り付けると緩んだり落ちたりする心配がなくなる。
このような固着具が薄板の予め設けられた孔に圧入されて充分な強度で固定されるよう、固着具に設けられる突出部（実際に薄板に圧入される部分）の外側周面にローレット状その他の凹凸を設けて薄板に圧入する方法が提案されている（例えば特許文献１）。Conventionally, a nut-like metal fastener called a fastener that can withstand a tensile load and a torque load and reliably press-fit a thin plate (sheet metal) is put into practical use. When such a nut-like metal fastener is attached, there is no risk of loosening or dropping.
A knurled shape is formed on the outer peripheral surface of the protruding portion (the portion that is actually press-fitted into the thin plate) provided in the fixture so that such a fastener is press-fitted into a hole provided in advance in the thin plate and fixed with sufficient strength. A method has been proposed in which other unevenness is provided and press-fitted into a thin plate (for example, Patent Document 1).

近年、例えば携帯電話機等の筐体においては「軽薄短小」と形容されるように筐体を軽くし、また薄くするような設計需要が増えてきている。このような需要に対応するためには、薄板（板金）そのものを薄くし、さらに固着具の全長を短くしなければならない。  In recent years, for example, in the case of a mobile phone or the like, there has been an increasing demand for design that makes the case lighter and thinner so that it is described as “light thin and short”. In order to meet such a demand, it is necessary to make the sheet (sheet metal) itself thin and further shorten the overall length of the fixing tool.

しかしながら、従来の固着具の突出部を薄板の板金に埋め込むためには板金の厚さがある程度必要であり、従来、板金の最小板厚はほぼ０．８ｍｍが限界の厚さであり、０．８ｍｍ未満の板厚の板金には対応できないという課題があった。  However, in order to embed the protruding portion of the conventional fixing tool in the thin sheet metal, a certain thickness of the sheet metal is necessary. Conventionally, the minimum sheet thickness of the sheet metal is a limit thickness of about 0.8 mm. There was a problem that it could not cope with a sheet metal having a thickness of less than 8 mm.

特開平８−２９１８１５号公報  JP-A-8-291815

上記したように、携帯電話機等の筐体において、軽く薄くするような設計需要に対応するためには板金そのものを薄くしなければならないが、板金が０．８ｍｍ未満の板厚には対応できないという課題があった。
この発明の目的は、板金の板厚が０．８ｍｍ未満であっても固着具を固定することのできる固着具と冶具と固着具の固定方法を提供することである。As mentioned above, in order to meet the design demand for light and thin casings of cellular phones and the like, the sheet metal itself must be thinned, but the sheet metal cannot handle a sheet thickness of less than 0.8 mm. There was a problem.
An object of the present invention is to provide a fixing tool, a jig, and a fixing method of the fixing tool, which can fix the fixing tool even if the thickness of the sheet metal is less than 0.8 mm.

そこで、本発明は、薄板の板金に設けられた下孔に圧入して固定される固着具と冶具であって、上記固着具は、円柱状の本体の外側周面上の基端側に前記本体の外径より大きく上記下孔よりも所定値大きい外径で上記板金の板厚と同じ長さで外側周面に多数の凹凸条を有する大径部と、この大径部と前記本体との間に前記本体より小さい外径で前記大径部の長さより短い小径部とを有し、上記冶具は、上記板金が置かれる面に上記固着具の本体が挿入される穴が設けられ、この穴の入口が面取りされている形状を有し、上記冶具に上記板金が置かれ、上記固着具の本体が上記板金に設けられた下孔を通して上記冶具の穴に挿入された状態で上記固着具の大径部が上記板金に圧入されるようにしたものである。
また、本発明は、薄板の板金に設けられた下孔に圧入して固定される固着具の固定方法であって、上記固着具は、円柱状の本体の外側周面上の基端側に前記本体の外径より大きく上記下孔よりも所定値大きい外径で上記板金の板厚と同じ長さで外側周面に多数の凹凸条を有する大径部と、この大径部と前記本体との間に前記本体より小さい外径で前記大径部の長さより短い小径部とを有し、上記固着具の本体が挿入される穴を有しこの穴の入口が面取りされている冶具を用いて、この冶具上に上記板金が置かれ、上記固着具の本体が上記板金に設けられた下孔を通して上記冶具の穴に挿入された状態で上記固着具の大径部が上記板金に圧入されるようにしたものである。Accordingly, the present invention is a fixing tool and a jig that are press-fitted and fixed in a prepared hole provided in a thin sheet metal, and the fixing tool is disposed on the base end side on the outer peripheral surface of a cylindrical main body. A large-diameter portion having an outer diameter larger than the lower hole and a predetermined value larger than the lower hole and having the same length as the thickness of the sheet metal and a large number of irregularities on the outer peripheral surface, and the large-diameter portion and the main body A small-diameter portion having an outer diameter smaller than the main body and shorter than the length of the large-diameter portion, and the jig is provided with a hole into which the main body of the fixing tool is inserted on the surface on which the sheet metal is placed, The hole has a chamfered shape, the sheet metal is placed on the jig, and the fixing body is inserted into the hole of the jig through a pilot hole provided in the sheet metal. The large diameter portion of the tool is press-fitted into the sheet metal.
The present invention also relates to a fixing method of a fixing tool that is press-fitted into a prepared hole provided in a thin metal plate, and the fixing tool is disposed on a base end side on an outer peripheral surface of a cylindrical main body. A large-diameter portion having an outer diameter larger than the outer diameter of the main body and a predetermined value larger than the lower hole and having the same length as the thickness of the sheet metal, and a large number of ridges on the outer peripheral surface, and A jig having an outer diameter smaller than that of the main body and a smaller diameter portion shorter than the length of the large diameter portion, and a hole into which the main body of the fixing tool is inserted and the entrance of the hole is chamfered. The large-diameter portion of the fixing tool is press-fitted into the sheet metal in a state where the sheet metal is placed on the jig and the main body of the fixing tool is inserted into the hole of the jig through a lower hole provided in the sheet metal. It is made to be done.

本発明は、板金の板厚が０．２ｍｍ〜０．８ｍｍ未満であっても対応することのできる固着具と冶具と固着具の固定方法を提供することが可能となる。  The present invention can provide a fixing tool, a jig, and a fixing method for the fixing tool, which can cope with a sheet metal thickness of 0.2 mm to less than 0.8 mm.

本発明の実施の形態が適用可能な固着具の一例を示す片側断面図。1 is a half sectional view showing an example of a fixing tool to which an embodiment of the present invention can be applied. 固着具を圧入する薄板の板金の一例を示す断面図。Sectional drawing which shows an example of the sheet metal of the thin plate which press-fits a fixing tool. 固着具を圧入する際に用いられる冶具の形状を示す断面図。Sectional drawing which shows the shape of the jig used when press-fitting a fixing tool. 固着具を板金の下孔に入れた圧入前の状態を示す図。The figure which shows the state before the press injection which put the fixing tool in the lower hole of sheet metal. 固着具を板金に圧入した後の状態を示す図。The figure which shows the state after pressing-in a fixing tool to a sheet metal.

以下、図面を参照して、この発明の実施の形態について詳細に説明する。
図１は、この発明に係るインサートと呼ばれる固着具１を示す片側断面図である。すなわち、この固着具１は、短い円柱状の本体２の基端側に、その外径より少し大径の大径部３および少し小径の小径部４が一体且つ同一中心軸上に設けられている。また、本体２の基端側から他端側に貫通した雌ねじ孔５が設けられている。
大径部３は、後述する板金の内で固定される板厚と同程度の高さ（長さあるいは幅）に作られており、大径部３の外側周面にはローレット状の凹凸条が設けられている。なお、大径部の外径および凹凸条の形状は、圧入する板金の材質等に応じて変えられる。
また、小径部４の高さ（長さあるいは幅）は、大径部３の高さより低く（長さが短いあるいは幅が狭い）設計されている。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a half sectional view showing a fixing tool 1 called an insert according to the present invention. That is, the fixing tool 1 is provided with a large diameter portion 3 slightly larger than the outer diameter and a small diameter portion 4 slightly smaller in diameter on the base end side of the short columnar body 2 integrally and on the same central axis. Yes. Further, a female screw hole 5 penetrating from the base end side of the main body 2 to the other end side is provided.
The large-diameter portion 3 is made to have a height (length or width) similar to a plate thickness fixed in a sheet metal, which will be described later, and a knurled uneven strip is formed on the outer peripheral surface of the large-diameter portion 3. Is provided. The outer diameter of the large-diameter portion and the shape of the uneven stripe can be changed according to the material of the sheet metal to be press-fitted.
Further, the height (length or width) of the small diameter portion 4 is designed to be lower than the height of the large diameter portion 3 (the length is short or the width is narrow).

図２は、固着具１が圧入される薄板の板金６を示す断面図である。図において板金６には、固着具１を圧入する下孔７が予め設けられている。
本実施例における板金６の材質はステンレス鋼であり、固着具１の材質は同じくステンレス鋼であるが窒化処理して表面が硬化されている。従って、固着具１は板金６より硬いものとなっている。FIG. 2 is a cross-sectional view showing a thin sheet metal 6 into which the fixing tool 1 is press-fitted. In the drawing, a sheet metal 6 is previously provided with a pilot hole 7 into which the fixing tool 1 is press-fitted.
The material of the sheet metal 6 in this embodiment is stainless steel, and the material of the fixture 1 is also stainless steel, but the surface is hardened by nitriding treatment. Therefore, the fixture 1 is harder than the sheet metal 6.

また、本実施例の固着具１は、１／１００ｍｍ単位で切削加工されている。
例えば、固着具１の寸法は、全長（基端面から他端面まで）が１．８０ｍｍ、大径部３の外径が３．００ｍｍで高さが０．３０ｍｍ、小径部４の外径が２．１０ｍｍで高さが０．２０ｍｍ、本体２の外径が２．６０ｍｍで高さが１．３０ｍｍで切削加工されている。板金６の寸法は、板厚が０．３０ｍｍ、下孔７の孔径が２．６５ｍｍである。
なお、固着具１の大径部３の外径は、板金６の下孔７に圧入後の固定強度を最適とするため予め試験を行って所定値を決定している。
また、固着具１は、本実施例ではステンレス鋼を用いているが、板金（軟鋼、ステンレス鋼、アルミニウム等）の材質に対応して炭素鋼、黄銅、軟鋼、アルミニウム、亜鉛等の金属を用いても良い。Moreover, the fixing tool 1 of a present Example is cut by the 1 / 100mm unit.
For example, the dimensions of the fixing tool 1 are 1.80 mm in total length (from the base end surface to the other end surface), the outer diameter of the large diameter portion 3 is 3.00 mm, the height is 0.30 mm, and the outer diameter of the small diameter portion 4 is 2. .10 mm, the height is 0.20 mm, the outer diameter of the main body 2 is 2.60 mm, and the height is 1.30 mm. As for the dimensions of the sheet metal 6, the sheet thickness is 0.30 mm, and the hole diameter of the lower hole 7 is 2.65 mm.
Note that the outer diameter of the large-diameter portion 3 of the fixing tool 1 is determined in advance by performing a test in order to optimize the fixing strength after press-fitting into the lower hole 7 of the sheet metal 6.
Moreover, although the fixing tool 1 uses stainless steel in this embodiment, it uses a metal such as carbon steel, brass, mild steel, aluminum, or zinc corresponding to the material of the sheet metal (soft steel, stainless steel, aluminum, etc.). May be.

図３は、上述した固着具１を板金６の下孔７に圧入する際に用いられる固着具１と板金６を受ける冶具１０を示す断面図である。冶具１０は、外径１０ｍｍ、高さ７ｍｍの円筒形で材質は鉄である。冶具１０には、板金６が置かれる面ａ側に固着具１の本体２が挿入される穴１１が設けられている。さらに穴１１の入口の面ａに対して面取りがされ面取り部１２を形成している。
本実施例の穴１１は、例えば直径２．６５ｍｍで深さ２．００ｍｍの寸法であり、面取り部がＣ０．２である。FIG. 3 is a cross-sectional view showing the fixture 1 used to press-fit the above-described fixture 1 into the lower hole 7 of the sheet metal 6 and the jig 10 that receives the sheet metal 6. The jig 10 has a cylindrical shape with an outer diameter of 10 mm and a height of 7 mm, and is made of iron. The jig 10 is provided with a hole 11 into which the main body 2 of the fixing tool 1 is inserted on the surface a side on which the sheet metal 6 is placed. Further, the chamfered portion 12 is formed by chamfering the entrance surface a of the hole 11.
The hole 11 of the present embodiment has a diameter of 2.65 mm and a depth of 2.00 mm, for example, and the chamfered portion is C0.2.

次に、このような構成において、冶具１０を用いて板金６に固着具１を圧入する動作について図４、図５を用いて説明する。
図４に示すように、まず、冶具１０の面ａ上に板金６を置き、板金６の下孔７を通して固着具１の本体２が冶具１０の穴１１に挿入されて置かれる。この際、固着具１の大径部３の外径が板金６の下孔７より大きいので、大径部３が板金６上に置かれた形になる。Next, the operation of press-fitting the fixing tool 1 into the sheet metal 6 using the jig 10 in such a configuration will be described with reference to FIGS. 4 and 5.
As shown in FIG. 4, first, the sheet metal 6 is placed on the surface a of the jig 10, and the main body 2 of the fixing tool 1 is inserted into the hole 11 of the jig 10 through the lower hole 7 of the sheet metal 6. At this time, since the outer diameter of the large diameter portion 3 of the fixing tool 1 is larger than the pilot hole 7 of the sheet metal 6, the large diameter portion 3 is placed on the sheet metal 6.

続いて、図４上の上部より図示しないハンマーにより固着具１の大径部３が板金６の下孔７に圧入される。その際、固着具１の大径部３のローレット状の凹凸条の凸部が板金６の下孔７の内周部分に喰込み、凹部に板金６の肉が喰込んで互いに噛合った状態となり、さらに凸部が喰込んで下方に喰いちぎられた下孔７の内周部分が冶具１０に設けられた面取り部１２により固着具１の小径部４に喰込む状態で押え付けられて固定される。  Subsequently, the large-diameter portion 3 of the fixing tool 1 is press-fitted into the lower hole 7 of the sheet metal 6 from the upper part of FIG. At that time, the convex part of the knurled uneven strip of the large-diameter portion 3 of the fixing tool 1 bites into the inner peripheral part of the lower hole 7 of the sheet metal 6 and the meat of the sheet metal 6 bites into the concave part and meshes with each other. Further, the inner peripheral portion of the lower hole 7 bitten downward by biting the convex portion is pressed and fixed in a state of biting into the small diameter portion 4 of the fixing tool 1 by the chamfered portion 12 provided in the jig 10. Is done.

続いて、冶具１０が下方に抜かれることにより圧入動作が終了する。
図５は、圧入動作が終了して板金６に固着具１が固定された状態を示すもので、固着具１の大径部３のローレット状の凹凸条の凹部が板金６の肉に互いに噛合い、大径部３のローレット状の凹凸条の凸部により喰いちぎられた下孔７の内周部分が小径部４に喰込んで固定されている。Subsequently, the press-fitting operation is completed when the jig 10 is pulled downward.
FIG. 5 shows a state in which the press-fitting operation is completed and the fixing tool 1 is fixed to the sheet metal 6. The knurled concave and convex recesses of the large diameter portion 3 of the fixing tool 1 mesh with the meat of the sheet metal 6. In addition, the inner peripheral portion of the lower hole 7, which is bitten by the convex portions of the knurled ridges of the large diameter portion 3, is caught and fixed in the small diameter portion 4.

図５に示すように、大径部３のローレット状の凹凸条の凹部に板金６の肉が互いに噛合い、大径部３のローレット状の凹凸条の凸部により喰いちぎられた下孔７の内周部分が小径部４に喰込んで固定されるので、従来不可能とされていた板金６の板厚が０．８ｍｍ未満の０．３ｍｍであっても固定することが可能となる。なお、本実施例では板金の板厚を０．３ｍｍとしたが、０．２ｍｍでも可能であり、本願に基づいた固着具、冶具、固定方法を用いることにより、板厚０．２ｍｍ〜０．８ｍｍ未満であっても固着具を固定することが可能となる。  As shown in FIG. 5, the sheet metal 6 is meshed with the concave portion of the knurled uneven strip of the large diameter portion 3, and the prepared hole 7 is bitten by the convex portion of the knurled concave strip of the large diameter portion 3. Since the inner peripheral portion of the sheet metal is bitten into the small-diameter portion 4 and is fixed, it is possible to fix the sheet metal 6 which has been impossible in the past even if the thickness is 0.3 mm which is less than 0.8 mm. In this embodiment, the sheet thickness of the sheet metal is set to 0.3 mm, but 0.2 mm is also possible, and by using the fixing tool, jig, and fixing method based on the present application, the sheet thickness is 0.2 mm to 0.00 mm. Even if it is less than 8 mm, the fixing tool can be fixed.

以上説明したように上記発明の実施の形態によれば、板金の板厚が０．２ｍｍ〜０．８ｍｍ未満であっても対応することのできる固着具と冶具と固着具の固定方法を提供することができる。  As described above, according to the embodiment of the present invention, there is provided a fixing tool, a jig, and a fixing method of the fixing tool, which can cope with a sheet metal thickness of 0.2 mm to less than 0.8 mm. be able to.

なお、本願発明は、上記実施形態に限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で種々に変形することが可能である。また、実施形態は可能な限り適宜組み合わせて実施してもよく、その場合組み合わせた効果が得られる。さらに、上記実施形態には種々の段階の発明が含まれており、開示される複数の構成要件における適宜な組み合わせにより種々の発明が抽出され得る。例えば、実施形態に示される全構成要件から幾つかの構成要件が削除されても、発明が解決しようとする課題の欄で述べた課題が解決でき、発明の効果の欄で述べられている効果が得られる場合には、この構成要件が削除された構成が発明として抽出され得る。  In addition, this invention is not limited to the said embodiment, In the implementation stage, it can change variously in the range which does not deviate from the summary. In addition, the embodiments may be combined as appropriate as possible, and in that case, the combined effect can be obtained. Furthermore, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be obtained as an invention.

１…固着具、２…本体、３…大径部、４…小径部、５…雌ねじ、６…板金、７…下孔、１０…冶具、１１…穴、１２…面取り部。  DESCRIPTION OF SYMBOLS 1 ... Fixing tool, 2 ... Main body, 3 ... Large diameter part, 4 ... Small diameter part, 5 ... Female screw, 6 ... Sheet metal, 7 ... Pilot hole, 10 ... Jig, 11 ... Hole, 12 ... Chamfering part.

Claims (2)

薄板の板金に設けられた下孔に圧入して固定される固着具と冶具であって、
上記固着具は、円柱状の本体の外側周面上の基端側に前記本体の外径より大きく上記下孔よりも所定値大きい外径で上記板金の板厚と同じ長さで外側周面に多数の凹凸条を有する大径部と、この大径部と前記本体との間に前記本体より小さい外径で前記大径部の長さより短い小径部とを有し、
上記冶具は、上記板金が置かれる面に上記固着具の本体が挿入される穴が設けられ、この穴の入口が面取りされている形状を有し、
上記冶具に上記板金が置かれ、上記固着具の本体が上記板金に設けられた下孔を通して上記冶具の穴に挿入された状態で上記固着具の大径部が上記板金に圧入されることを特徴とする固着具と冶具。A fixing tool and a jig that are press-fitted and fixed in a pilot hole provided in a thin metal plate,
The fixing tool has an outer peripheral surface having an outer diameter that is larger than the outer diameter of the main body and larger than the lower hole by a predetermined value on the base end side on the outer peripheral surface of the cylindrical main body and has the same length as the thickness of the sheet metal. A large-diameter portion having a large number of irregular stripes, and a small-diameter portion shorter than the length of the large-diameter portion with an outer diameter smaller than the main body between the large-diameter portion and the main body,
The jig has a shape in which a hole into which the main body of the fixing tool is inserted is provided on a surface on which the sheet metal is placed, and an entrance of the hole is chamfered,
The sheet metal is placed on the jig, and the large-diameter portion of the fastener is press-fitted into the sheet metal in a state where the main body of the fastener is inserted into the hole of the jig through a lower hole provided in the sheet metal. Features fasteners and jigs. 薄板の板金に設けられた下孔に圧入して固定される固着具の固定方法であって、
上記固着具は、円柱状の本体の外側周面上の基端側に前記本体の外径より大きく上記下孔よりも所定値大きい外径で上記板金の板厚と同じ長さで外側周面に多数の凹凸条を有する大径部と、この大径部と前記本体との間に前記本体より小さい外径で前記大径部の長さより短い小径部とを有し、
上記固着具の本体が挿入される穴を有しこの穴の入口が面取りされている冶具を用いて、この冶具上に上記板金が置かれ、上記固着具の本体が上記板金に設けられた下孔を通して上記冶具の穴に挿入された状態で上記固着具の大径部が上記板金に圧入されることを特徴とする固着具の固定方法。It is a fixing method of a fixing tool that is press-fitted into a prepared hole provided in a thin metal plate,
The fixing tool has an outer peripheral surface having an outer diameter that is larger than the outer diameter of the main body and larger than the lower hole by a predetermined value on the base end side on the outer peripheral surface of the cylindrical main body and has the same length as the thickness of the sheet metal. A large-diameter portion having a large number of irregular stripes, and a small-diameter portion shorter than the length of the large-diameter portion with an outer diameter smaller than the main body between the large-diameter portion and the main body,
Using a jig having a hole into which the main body of the fixing tool is inserted and chamfered at the entrance of the hole, the sheet metal is placed on the jig, and the main body of the fixing tool is provided on the sheet metal. A fixing method of a fixing tool, wherein a large diameter portion of the fixing tool is press-fitted into the sheet metal while being inserted into a hole of the jig through a hole.
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