JP2001322037A - Method for providing machining part on metal member - Google Patents
Method for providing machining part on metal memberInfo
- Publication number
- JP2001322037A JP2001322037A JP2000148624A JP2000148624A JP2001322037A JP 2001322037 A JP2001322037 A JP 2001322037A JP 2000148624 A JP2000148624 A JP 2000148624A JP 2000148624 A JP2000148624 A JP 2000148624A JP 2001322037 A JP2001322037 A JP 2001322037A
- Authority
- JP
- Japan
- Prior art keywords
- metal member
- insert
- metal
- processed
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Forging (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属部材に加工部
分を設ける方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for providing a worked part on a metal member.
【０００２】[0002]
【従来の技術】現在、非常に多くの製品、特に筐体部材
が樹脂で射出成形により製造されていが、環境、省資源
の観点からリサイクルの困難な樹脂ではなくリサイクル
可能な材料で筐体を作ることが望まれている。そこで、
注目されているのがマグネシウム合金の利用である。マ
グネシウム合金を使用すれば、リサイクル可能で、ま
た、樹脂よりも強度が高いので薄くできることから、樹
脂と大差ない重量で筐体を製造することが可能であり、
特に、電子機器部品に用いた場合は、電磁遮蔽性も向上
するという利点も得られるので、電子機器部品へのマグ
ネシウム合金の利用は特に注目されている。2. Description of the Related Art At present, a very large number of products, particularly housing members, are manufactured by injection molding with resin. However, housing is made of a recyclable material instead of a resin which is difficult to recycle from the viewpoint of environment and resource saving. It is desired to make. Therefore,
Attention has been focused on the use of magnesium alloys. If a magnesium alloy is used, it can be recycled, and since it is stronger than resin, it can be made thinner, so it is possible to manufacture a housing with a weight that is not much different from resin,
In particular, when used for electronic equipment parts, the advantage of improving the electromagnetic shielding properties is also obtained, and therefore, the use of magnesium alloys for electronic equipment parts has received particular attention.
【０００３】ところで、筐体にネジ穴等の加工部分を設
ける、あるいは、加工を施すことが要求されることが多
い。プラスチックの場合は予め形成したインサート穴に
ネジ穴を有する部材を加熱挿入することによりこのよう
な要求に応えることができる。しかしながら、マグネシ
ウム合金の場合は、溶融温度が高温のために、このよう
な方法をとることができず、従来、鋳造成形後に機械加
工でネジ穴等を加工していた。ところが、多数のネジ穴
を加工するには、回転をともなう複雑精密な加工設備を
要し、また切粉処理も必要であり、工具の交換も必要
で、加工時間が長くかかり、加工費が高いという問題が
ある。[0003] By the way, it is often required to provide a machined portion such as a screw hole in a housing or to perform machining. In the case of plastic, such a requirement can be satisfied by inserting a member having a screw hole into a previously formed insert hole by heating. However, in the case of a magnesium alloy, such a method cannot be adopted because the melting temperature is high, and conventionally, screw holes and the like have been machined after casting. However, machining a large number of screw holes requires complicated and precise machining equipment with rotation, requires chip processing, requires tool replacement, requires a long machining time, and is expensive. There is a problem.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記問題に鑑
み、金属部材に加工部分を簡単、短時間で形成すること
が可能な方法を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a method capable of forming a processed portion on a metal member simply and in a short time.
【０００５】[0005]
【課題を解決するための手段】請求項１の発明によれ
ば、金属部材にインサート穴を形成するステップと、所
望の形状に加工された加工部分と、インサート穴の半径
より若干大きい歯先半径を有し軸線に対して傾斜した傾
斜歯を外周面に備えたインサート部分とを有する予加工
部品を、金属部材と同種または異種の金属から金属部材
とは別個に形成するステップと、予加工部品のインサー
ト部分の軸線を、金属部材のインサート穴の軸線に合わ
せながら、予加工部品を金属部材に向けて押圧して、予
加工部品のインサート部分の傾斜歯を金属部材のインサ
ート穴の壁面に食い込ませて予加工部品を金属部材に捩
じりながら嵌め込むステップと、から成る金属部材に加
工部分を設ける方法が提供される。このような方法によ
れば、所望の形状に予め加工された加工部分を押圧作業
のみで金属部材に取り付けられるので、金属部材に直接
加工をすることなく金属部材に加工部分を設けることが
できる。According to the first aspect of the present invention, a step of forming an insert hole in a metal member, a processed portion processed into a desired shape, and a tip radius slightly larger than a radius of the insert hole are provided. Forming a pre-machined part having an insert portion provided on the outer peripheral surface with inclined teeth inclined with respect to the axis from a metal of the same or different kind from the metal member separately from the metal member; While aligning the axis of the insert part with the axis of the insert hole of the metal member, press the pre-processed part toward the metal member and cut the inclined teeth of the insert part of the pre-work part into the wall surface of the insert hole of the metal member And twisting the pre-worked part into the metal member. According to such a method, the processed portion previously processed into the desired shape can be attached to the metal member only by pressing operation, so that the processed portion can be provided on the metal member without directly processing the metal member.
【０００６】請求項２の発明によれば、請求項１の発明
において、予加工部品のインサート部分の傾斜歯の軸線
に対する傾斜角が４５度以下にされている方法が提供さ
れる。請求項３の発明によれば、請求項１の発明におい
て、金属部材に予加工部品を取り付けるステップが、加
熱状態でおこなわれる方法が提供される。According to a second aspect of the present invention, there is provided a method according to the first aspect, wherein the inclination angle of the insert portion of the pre-processed part with respect to the axis of the inclined tooth is 45 degrees or less. According to a third aspect of the present invention, there is provided the method of the first aspect, wherein the step of attaching the pre-processed part to the metal member is performed in a heated state.
【０００７】請求項４の発明によれば、請求項１の発明
において、金属部材の金属が、アルミニウム、マグネシ
ウム、チタン、ベリリウム、または、それらのいずれか
を主成分とする合金である方法が提供される。請求項５
の発明によれば、請求項４の発明において、予加工部品
の金属が、金属部材の金属に含まれる金属から成る金属
である方法が提供される。請求項６の発明によれば、請
求項４の発明において、金属部材の金属がマグネシウム
を主成分とした合金であって、予加工部品の金属が真鍮
またはアルミニウム合金である方法が提供される。請求
項７の発明によれば、請求項６の発明において、予加工
部品に形成したインサート部分の傾斜歯の歯先円の半径
が金属部材に形成したインサート穴の半径よりも０．１
ｍｍ乃至０．２ｍｍ大きくされている方法が提供され
る。According to a fourth aspect of the present invention, there is provided the method according to the first aspect, wherein the metal of the metal member is aluminum, magnesium, titanium, beryllium, or an alloy containing any of them as a main component. Is done. Claim 5
According to the invention of the fourth aspect, there is provided a method according to the fourth aspect, wherein the metal of the pre-processed part is a metal composed of a metal contained in the metal of the metal member. According to a sixth aspect of the present invention, there is provided the method according to the fourth aspect, wherein the metal of the metal member is an alloy mainly containing magnesium, and the metal of the pre-processed part is a brass or aluminum alloy. According to the invention of claim 7, in the invention of claim 6, the radius of the addendum circle of the inclined tooth of the insert portion formed in the pre-processed part is smaller than the radius of the insert hole formed in the metal member by 0.1.
A method is provided that is scaled from 0.2 mm to 0.2 mm.
【０００８】請求項８の発明によれば、請求項１の発明
において、金属部材のインサート穴が金属部材に予め形
成されたボスに形成され、予加工部品がネジ穴を有する
部材であってネジ穴の径方向外側の外面に歯付きインサ
ート部分が形成されている方法が提供される。請求項９
の発明によれば、請求項８の発明において、ネジ穴が右
ネジであって、インサート部分の傾斜歯が加工部分の軸
線に対して右下がりに形成されていること方法が提供さ
れる。According to an eighth aspect of the present invention, in the first aspect of the present invention, the insert hole of the metal member is formed in a boss formed in advance in the metal member, and the pre-processed component is a member having a screw hole, and A method is provided wherein the toothed insert portion is formed on a radially outer surface of the bore. Claim 9
According to the invention of the eighth aspect, there is provided the method according to the eighth aspect, wherein the screw hole is a right-hand thread, and the inclined teeth of the insert portion are formed to be lower rightward with respect to the axis of the processed portion.
【０００９】[0009]
【発明の実施の形態】以下、添付の図面を参照して、マ
グネシウム合金製の筐体の平面部に形成したボスにネジ
穴を設ける場合に適用した本発明の実施の形態を説明す
る。図１は、本発明の方法を説明する組み立て図であっ
て、先ず、図の（Ａ）の下段と、上段に示されるものを
それぞれ別個に用意する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to a case where a boss formed on a flat portion of a casing made of a magnesium alloy is provided with a screw hole will be described below with reference to the accompanying drawings. FIG. 1 is an assembly view for explaining the method of the present invention. First, the lower and upper parts shown in FIG. 1A are separately prepared.
【００１０】図１の（Ａ）の下段に示されるのは筐体１
の本体部分１０と一体に鋳造で成形されたインサート穴
２１を有するボス２０である。この実施の形態の場合、
インサート穴２１の半径は１．６ｍｍであり、ボス２０
の上面２２の外径は２．７５ｍｍとされている。The lower part of FIG.
A boss 20 having an insert hole 21 formed integrally with the main body portion 10 by casting. In the case of this embodiment,
The radius of the insert hole 21 is 1.6 mm.
Has an outer diameter of 2.75 mm.
【００１１】一方、（Ａ）の上段に示されるのは所望の
諸元のネジ穴３１が内側に加工され、外側に傾斜した複
数の傾斜歯３３から成るインサート部分３２を有する予
加工部品３０である。傾斜歯３３の刃先円の半径は１．
７５ｍｍとされていて、インサート穴２１の半径は１．
６ｍｍよりも０．１５ｍｍ大きくされている。そして、
傾斜歯３３は図２に示されるように、軸線３５に対して
右下下がりに傾斜していてその傾斜角θは３０度以上４
５度以下とすることが好ましい。On the other hand, shown in the upper part of (A) is a pre-machined part 30 in which a screw hole 31 of desired specifications is machined inside and an insert part 32 composed of a plurality of inclined teeth 33 inclined outward. is there. The radius of the cutting edge circle of the inclined tooth 33 is 1.
The insert hole 21 has a radius of 1.75 mm.
It is 0.15 mm larger than 6 mm. And
As shown in FIG. 2, the inclined teeth 33 are inclined downward and to the lower right with respect to the axis 35, and the inclination angle θ is 30 degrees or more.
It is preferable to set it to 5 degrees or less.
【００１２】次に、少なくとも筐体１を約１５０°Ｃに
加熱しておいて、図１の（Ｂ）に示されるように、ボス
２０の軸線２５に、予加工部品３０の軸線３５が一致す
るように、ボス２０の上に予加工部品３０を載置して予
加工部品３０の上面３４からボス２０の軸線２５（＝予
加工部品３０の軸線３５）の方向にそって真っ直ぐに押
圧力Ｆを加える。すると、予加工部品３０のインサート
部分３２の傾斜歯３３がボス２０のインサート穴２１の
壁面を切りわけながら斜めに進み、予加工部品３０は捩
じられながらボス２０に嵌入していく。図１の（Ｃ）
は、予加工部品３０の上面３４がボス２０の上面２２と
一致するまで予加工部品３０を押し込んだ完成状態を示
している。Next, at least the housing 1 is heated to about 150 ° C., and as shown in FIG. 1B, the axis 25 of the boss 20 coincides with the axis 35 of the pre-processed part 30. The pre-processed part 30 is placed on the boss 20 so as to press the pre-processed part 30 straight from the upper surface 34 of the pre-processed part 30 in the direction of the axis 25 of the boss 20 (= the axis 35 of the pre-processed part 30). Add F. Then, the inclined teeth 33 of the insert portion 32 of the pre-processed part 30 advance obliquely while cutting the wall surface of the insert hole 21 of the boss 20, and the pre-processed part 30 is fitted into the boss 20 while being twisted. FIG. 1 (C)
Shows a completed state in which the pre-processed component 30 is pushed in until the upper surface 34 of the pre-processed component 30 matches the upper surface 22 of the boss 20.
【００１３】上記のように、この実施の形態では、予め
ネジ３１が加工された予加工部品３０を筐体１のボス２
０に載置して真っ直ぐに押圧力を加えるだけで、ボス２
０にネジ３１が設けられる。すなわち、ボス２０に機械
加工することなくネジ３１を設けることができ、ネジ３
１を設けるための工数を大幅に減少することができる。As described above, in this embodiment, the pre-processed part 30 in which the screw 31 has been processed in advance is
Boss 2
0 is provided with a screw 31. That is, the screw 31 can be provided without machining the boss 20 and the screw 3
The number of steps for providing 1 can be greatly reduced.
【００１４】そして、インサート部分３２の内部に形成
されるネジ穴３１が右ネジであるのに対して、インサー
ト部分３２の傾斜歯３３は右下がりに形成されており、
ネジ穴３１に螺合されるボルト（図示せず）を左回しに
抜く時に、インサート３２が引き抜かれないようにされ
ている。While the screw hole 31 formed inside the insert portion 32 is a right-handed screw, the inclined teeth 33 of the insert portion 32 are formed at the lower right.
When a bolt (not shown) screwed into the screw hole 31 is pulled counterclockwise, the insert 32 is prevented from being pulled out.
【００１５】また、筐体１の材料のマグネシウム合金
は、マグネシウムが９０％、アルミニウム１０％、亜鉛
１％から成る合金であって、一方、予加工部品３０は真
鍮、またはアルミニウム合金で作られている。そして、
廃品とされた場合に、予加工部品３０を取り外すことな
く一緒に溶融して、合金の成分調整をすれば同じ組成比
のマグネシウム合金を得ることができる。The magnesium alloy as the material of the casing 1 is an alloy composed of 90% magnesium, 10% aluminum and 1% zinc, while the pre-processed part 30 is made of brass or aluminum alloy. I have. And
If it is discarded, it can be melted together without removing the pre-processed parts 30, and if the components of the alloy are adjusted, a magnesium alloy having the same composition ratio can be obtained.
【００１６】以上、ボスにネジを設ける場合を例に説明
したが、インサート穴とインサート部分を上記のように
形成すれば、勿論、他の種類の加工部分を設ける場合に
も適用することができる。In the above, the case where the boss is provided with a screw has been described as an example. However, if the insert hole and the insert portion are formed as described above, it is of course applicable to the case where another type of processed portion is provided. .
【００１７】[0017]
【発明の効果】本発明は、金属部材に加工部分を設ける
方法であるが、金属部材にインサート穴を形成するステ
ップと、所望の形状に加工された加工部分と、インサー
ト穴の半径より若干大きい歯先半径を有し軸線に対して
傾斜した傾斜歯を外周面に備えたインサート部分とを有
する予加工部品を、金属部材と同種または異種の金属か
ら金属部材とは別個に形成するステップと、予加工部品
のインサート部分の軸線を、金属部材のインサート穴の
軸線に合わせながら、予加工部品を金属部材に向けて押
圧して、予加工部品のインサート部分の傾斜歯を金属部
材のインサート穴の壁面に食い込ませて予加工部品を金
属部材に捩じりながら嵌め込むステップと、から成る。
したがって、所望の形状に予め加工された加工部分を押
圧作業のみで金属部材に取り付けられるので、金属部材
に直接機械加工をすることなく金属部材に加工部分を設
けることができる。したがって、加工部分は金属部材へ
の作業の終了を待たずに別個に形成することができ、し
かも、単なる押圧で取り付けができるので作業時間が大
幅に短縮できる。また、廃品となった時に予加工部品を
取り除くことなく一緒に溶融できる。特に、請求項５の
ように、予加工部品の金属が、金属部材の金属に含まれ
る金属から成る金属であるようにすれば、リサイクルが
やりやすい。According to the present invention, there is provided a method of providing a machined portion in a metal member. The step of forming an insert hole in the metal member, the machined portion machined into a desired shape, and a radius slightly larger than the radius of the insert hole. Forming a pre-machined part having a tip radius and an insert part provided on the outer peripheral surface with inclined teeth inclined with respect to the axis from a metal member of the same type or different types of metal separately from the metal member; While aligning the axis of the insert part of the pre-processed part with the axis of the insert hole of the metal member, press the pre-processed part toward the metal member, and insert the inclined teeth of the insert part of the pre-processed part into the insert hole of the metal member. And cutting the pre-worked part into the metal member while twisting it into the wall surface.
Therefore, since a processed portion previously processed into a desired shape can be attached to the metal member only by pressing operation, the processed portion can be provided on the metal member without directly machining the metal member. Therefore, the processed portion can be formed separately without waiting for the end of the work on the metal member, and since the work can be attached by simple pressing, the work time can be greatly reduced. Moreover, when it becomes a waste product, it can be melted together without removing the pre-processed parts. In particular, if the metal of the pre-processed part is a metal made of a metal contained in the metal of the metal member, recycling is easy.
【図１】本発明を説明す組み立て図である。FIG. 1 is an assembly view illustrating the present invention.
【図２】インサート部分の傾斜歯の傾斜角を説明する図
である。FIG. 2 is a view for explaining an inclination angle of an inclined tooth of an insert portion.
２０…ボス ２１…インサート穴 ３０…予加工品 ３１…ネジ穴 ３２…インサート部分 ３３…歯 Reference Signs List 20 boss 21 insert hole 30 pre-processed product 31 screw hole 32 insert part 33 tooth
Claims (9)
ップと、 所望の形状に加工された加工部分と、インサート穴の半
径より若干大きい歯先半径を有し軸線に対して傾斜した
傾斜歯を外周面に備えたインサート部分とを有する予加
工部品を、金属部材と同種または異種の金属から金属部
材とは別個に形成するステップと、 予加工部品のインサート部分の軸線を、金属部材のイン
サート穴の軸線に合わせながら、予加工部品を金属部材
に向けて押圧して、予加工部品のインサート部分の傾斜
歯を金属部材のインサート穴の壁面に食い込ませて予加
工部品を金属部材に捩じりながら嵌め込むステップと、 から成る金属部材に加工部分を設ける方法。1. A step of forming an insert hole in a metal member, a processing portion processed into a desired shape, and an inclined tooth having a tip radius slightly larger than a radius of the insert hole and inclined with respect to an axis. Forming a pre-processed part having an insert portion provided on the surface separately from the metal member from the same or different metal as the metal member, and setting the axis of the insert portion of the pre-processed part to the insert hole of the metal member. While aligning with the axis, press the pre-processed part against the metal member, bite the inclined teeth of the insert part of the pre-processed part into the wall surface of the insert hole of the metal member, and twist the pre-processed part to the metal member Fitting a metal member comprising: forming a processed portion on the metal member.
軸線に対する傾斜角が３０度以上４５度以下にされてい
ることを特徴とする請求項１に記載の方法。2. The method according to claim 1, wherein the angle of inclination of the insert portion of the pre-machined part with respect to the axis of the inclined tooth is set to 30 degrees or more and 45 degrees or less.
ップが、加熱状態でおこなわれることを特徴とする請求
項１に記載の方法。3. The method according to claim 1, wherein the step of attaching the pre-machined part to the metal member is performed in a heated state.
ネシウム、チタン、ベリリウム、または、それらのいず
れかを主成分とする合金であることを特徴とする請求項
１に記載の方法。4. The method according to claim 1, wherein the metal of the metal member is aluminum, magnesium, titanium, beryllium, or an alloy containing any of them as a main component.
含まれる金属から成る金属であることを特徴とする請求
項４に記載の方法。5. The method according to claim 4, wherein the metal of the pre-worked part is a metal comprising a metal contained in the metal of the metal member.
とした合金であって、予加工部品の金属が真鍮、また
は、アルミニウム合金であることを特徴とする請求項４
に記載の方法。6. The metal of the metal member is an alloy containing magnesium as a main component, and the metal of the pre-processed part is brass or an aluminum alloy.
The method described in.
傾斜歯の歯先円の半径が金属部材に形成したインサート
穴の半径よりも０．１ｍｍ乃至０．２ｍｍ大きくされて
いることを特徴とする請求項６に記載の方法。7. The radius of the tip circle of the inclined tooth of the insert portion formed in the pre-processed part is set to be 0.1 mm to 0.2 mm larger than the radius of the insert hole formed in the metal member. The method of claim 6.
め形成されたボスに形成され、予加工部品がネジ穴を有
する部材であってネジ穴の径方向外側の外周面にインサ
ート部分が形成されていることを特徴とする請求項１に
記載の方法。8. An insert hole of the metal member is formed in a boss formed in advance in the metal member, and the pre-processed component is a member having a screw hole, and an insert portion is formed on a radially outer peripheral surface of the screw hole. The method of claim 1, wherein
分の傾斜歯が加工部分の軸線に対して右下がりに傾斜し
ていることを特徴とする請求項８に記載の方法。9. The method according to claim 8, wherein the screw hole is a right-hand thread, and the inclined teeth of the insert portion are inclined downward to the right with respect to the axis of the machined portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000148624A JP4592152B2 (en) | 2000-05-16 | 2000-05-16 | Method of providing a processed part on a metal member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000148624A JP4592152B2 (en) | 2000-05-16 | 2000-05-16 | Method of providing a processed part on a metal member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001322037A true JP2001322037A (en) | 2001-11-20 |
| JP4592152B2 JP4592152B2 (en) | 2010-12-01 |
Family
ID=18654622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000148624A Expired - Fee Related JP4592152B2 (en) | 2000-05-16 | 2000-05-16 | Method of providing a processed part on a metal member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4592152B2 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58160022A (en) * | 1982-03-18 | 1983-09-22 | Sekisui Chem Co Ltd | Metal insert fixing device for molded product of synthetic resin material |
| JPS60125071U (en) * | 1984-01-27 | 1985-08-23 | トヨタ自動車株式会社 | Helisert insertion tool |
| JPH0642027U (en) * | 1992-11-13 | 1994-06-03 | 北辰工業株式会社 | Platen metal fittings |
| JPH1142512A (en) * | 1997-07-25 | 1999-02-16 | Hitachi Powdered Metals Co Ltd | Press-in jointing method for outer member made of aluminium and inner member made of iron |
| JP2000130424A (en) * | 1998-10-27 | 2000-05-12 | Eto Co Ltd | Coil nut and screw device |
| JP2001120798A (en) * | 1999-10-27 | 2001-05-08 | Fuji Shoji:Kk | Turning force transmission mechanism of pachinko game machine |
-
2000
- 2000-05-16 JP JP2000148624A patent/JP4592152B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58160022A (en) * | 1982-03-18 | 1983-09-22 | Sekisui Chem Co Ltd | Metal insert fixing device for molded product of synthetic resin material |
| JPS60125071U (en) * | 1984-01-27 | 1985-08-23 | トヨタ自動車株式会社 | Helisert insertion tool |
| JPH0642027U (en) * | 1992-11-13 | 1994-06-03 | 北辰工業株式会社 | Platen metal fittings |
| JPH1142512A (en) * | 1997-07-25 | 1999-02-16 | Hitachi Powdered Metals Co Ltd | Press-in jointing method for outer member made of aluminium and inner member made of iron |
| JP2000130424A (en) * | 1998-10-27 | 2000-05-12 | Eto Co Ltd | Coil nut and screw device |
| JP2001120798A (en) * | 1999-10-27 | 2001-05-08 | Fuji Shoji:Kk | Turning force transmission mechanism of pachinko game machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4592152B2 (en) | 2010-12-01 |
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