JP2579389Y2 - Plastic bolt - Google Patents
Plastic boltInfo
- Publication number
- JP2579389Y2 JP2579389Y2 JP1992089278U JP8927892U JP2579389Y2 JP 2579389 Y2 JP2579389 Y2 JP 2579389Y2 JP 1992089278 U JP1992089278 U JP 1992089278U JP 8927892 U JP8927892 U JP 8927892U JP 2579389 Y2 JP2579389 Y2 JP 2579389Y2
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- screw shaft
- bolt head
- sub
- seat surface
- 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.)
- Expired - Lifetime
Links
Landscapes
- Bolts, Nuts, And Washers (AREA)
Description
【0001】[0001]
【産業上の利用分野】本考案は化学、電気装置等におけ
る耐薬品性、電気絶縁性を必要とする締結部、その他装
飾的外観を必要とする製品の締結部、純水装置、半導体
洗浄装置等における清浄性を重視する締結部、並びに耐
候性が必要な諸装置の締結部等に使用されるプラスチッ
クボルトに関する。BACKGROUND OF THE INVENTION The present invention relates to a fastener for chemical or electrical equipment, which requires chemical resistance and electrical insulation, a fastener for a product requiring a decorative appearance, a pure water device, and a semiconductor cleaning device. The present invention relates to a plastic bolt used for a fastening portion that places importance on cleanliness in a device, etc., and a fastening portion of various devices requiring weather resistance.
【0002】[0002]
【従来の技術】プラスチックボルトは、エンジニアリン
グプラスチックの開発進展に伴って、金属製のボルトに
匹敵する機械強度と耐熱性を有し、さらに化学、電気装
置に要求される耐薬品性、電気絶縁性の他、外観、耐候
性、金属イオン溶出防止性等、様々な産業分野で要求さ
れている複雑な特性に応ずるものが市場に供給されてき
た。プラスチックボルトは、射出成形等の成形技術によ
る製造が可能であるために、金属ボルトで普遍的な切削
加工では製作困難な形状のボルトが能率よく生産されて
いる。そのためプラスチックボルトでは、有効ネジ部を
ボルト頭部座面まで成形したものが多く生産されてい
る。2. Description of the Related Art With the development of engineering plastics, plastic bolts have mechanical strength and heat resistance comparable to metal bolts, as well as chemical resistance and electrical insulation required for chemical and electrical equipment. In addition, products that respond to complex characteristics required in various industrial fields, such as appearance, weather resistance, and metal ion elution prevention properties, have been supplied to the market. Since plastic bolts can be manufactured by molding techniques such as injection molding, metal bolts having a shape that is difficult to manufacture by universal cutting are efficiently produced. For this reason, many plastic bolts in which the effective screw portion is molded to the bolt head seat surface are produced.
【0003】[0003]
【考案が解決しようとする課題】有効ネジ部をボルト頭
部座面まで成形したプラスチックボルトでは、ボルト頭
部座面におけるネジ軸付け根の形状が切り欠き効果を持
つことから、ボルトを締め付けたときに、ネジ軸がボル
ト座面の付け根から破断し易く、許容締付け力が低下す
る傾向があった。金属ボルトでは、ネジ軸のボルト座面
付け根にRフィレットと称される断面が円弧をなす隅肉
をつけ、切り欠き形状効果を防止することが一般に行わ
れている。[Problem to be Solved by the Invention] In the case of a plastic bolt in which an effective screw portion is molded to the bolt head seat surface, the shape of the root of the screw shaft on the bolt head seat surface has a notch effect. In addition, the screw shaft tends to break from the root of the bolt seat, and the allowable tightening force tends to decrease. In metal bolts, it is generally practiced to add a fillet having a circular cross section called an R fillet to the root of the bolt seat surface of the screw shaft to prevent a notch shape effect.
【0004】一方、プラスチック製や金属製のボルト
は、ともに緩み止めのために、スプリングワッシャ、そ
の他様々な廻り止め部品が併用されることが多い。特
に、プラスチックボルトでは締付力があまくなる傾向か
ら、廻り止め部品が多用されてきた。On the other hand, both plastic and metal bolts are often used in combination with spring washers and various other detent components to prevent loosening. In particular, since the tightening force tends to be loose in plastic bolts, anti-rotation parts have been frequently used.
【0005】本考案の目的は、従来のプラスチックボル
トで起こりがちであったボルトの緩みを防止する廻り止
め機能をボルトに与えると共に、ネジ軸のボルト頭部座
面付け根における破断による強度低下を防止するように
したプラスチックボルトを提供することにある。An object of the present invention is to provide a bolt with a detent function for preventing the bolt from being loosened, which tends to occur in a conventional plastic bolt, and to prevent a decrease in strength due to breakage at the root of the bolt head seat surface of the screw shaft. An object of the present invention is to provide a plastic bolt adapted to be used.
【0006】[0006]
【課題を解決するための手段】上記目的を解決するため
の本考案は、プラスチックボルトのボルト頭部の座面へ
のネジ軸の付け根周囲に、ボルト頭部の座面からネジ軸
の表面に向かって盛り上がる副座面を設け、当該副座面
の外周縁のボルト頭部の座面への投影形状が任意の頂上
数を持つ凹凸形をなし、副座面の外周縁より外側はボル
ト頭部の座面と一致した平面で囲まれ、内側はボルト頭
部の座面よりも盛り上がった面で構成されており、副座
面がネジ軸表面と交差する部分では副座面が曲面によっ
てネジ軸表面に入る隅肉を構成することにある。SUMMARY OF THE INVENTION The present invention for solving the above-mentioned object is to provide a plastic bolt around a root of a screw shaft on a bearing surface of a bolt head and from a bearing surface of a bolt head to a surface of a screw shaft. A sub-seat surface that rises toward the bottom is provided, and a projection shape of the outer peripheral edge of the sub-seat surface onto the bearing surface of the bolt head forms an irregular shape having an arbitrary number of peaks. It is surrounded by a plane that matches the seating surface of the part, and the inside is composed of a surface that is raised more than the seating surface of the bolt head, and where the auxiliary seating surface intersects the screw shaft surface, the auxiliary seating surface is screwed by a curved surface. It is to constitute the fillet that enters the shaft surface.
【0007】[0007]
【作用】プラスチックボルトを締め付けると、先ずボル
ト頭部の副座面が被締め付け部材のボルト孔周辺と被締
め付け部材の締め付け表面に接触を始める。さらに締め
付けを進めると、ボルト頭部の副座面は変形を始める。
即ち、径方向の締め付け力によって副座面の凸部の材料
が凹部側へ押し出し可能となり、その材料の一部はボル
ト孔に圧入されてボルト孔とネジ軸の間隙を満たし、両
部材を緊迫する。ボルトを完全に締め付けると、ボルト
頭部の座面が被締め付け部材表面に直接圧接すると共
に、ボルト孔とネジ軸間の緊迫も進み、ボルトの緩み止
め効果も最大になる。When the plastic bolt is tightened, first, the auxiliary seating surface of the bolt head starts to contact around the bolt hole of the member to be tightened and the tightening surface of the member to be tightened. When the tightening is further advanced, the sub seat surface of the bolt head starts to deform.
That is, the material of the convex portion of the sub seat surface can be pushed out to the concave side by the radial tightening force, and a part of the material is press-fitted into the bolt hole to fill the gap between the bolt hole and the screw shaft. I do. When the bolt is completely tightened, the seat surface of the bolt head directly presses against the surface of the member to be tightened, and the tightening between the bolt hole and the screw shaft is advanced, so that the effect of preventing the bolt from loosening is maximized.
【0008】[0008]
【実施例】本発明の実施例を添付の図面に基づいて詳述
する。プラスチックボルトとしては、平面状の締め付け
座面を有する様々な頭部形状を持つものについて可能で
あるが、ボタン型の頭部を持つ通常ビスと称される小型
のボルトを図示する。ボルト1は、第1図に示すよう
に、ボタン型のボルト頭部2とネジ軸4からなってい
る。ボルト頭部2は、ボルト締め付け工具が嵌合する操
作溝7を備えている。操作溝7は中心に6角溝8を有し
この6角溝8から伸びるマイナス溝9とから構成でき
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. A plastic bolt having various head shapes having a flat fastening seat surface is possible, but a small bolt generally called a screw having a button-shaped head is illustrated. The bolt 1 comprises a button-shaped bolt head 2 and a screw shaft 4 as shown in FIG. The bolt head 2 has an operation groove 7 into which a bolt tightening tool is fitted. The operation groove 7 has a hexagonal groove 8 at the center and can be constituted by a minus groove 9 extending from the hexagonal groove 8.
【0009】ボルト頭部2の座面3とネジ軸4の付け根
周囲には、座面3からネジ軸4に向かって傾斜して立ち
上がる稜線5を持つ副座面10と、当該副座面10がネ
ジ軸4の表面と交わる角部を埋める隅肉6がある。副座
面10と隅肉6は、ボルト頭部2の座面3上への投影形
状が、図2に示すように各々8つの頂上11と谷12か
らなる凹凸形の外周縁を持ち、当該外周縁の外側は座面
3の平面に落ち込んでおり、内側は稜線5のネジ軸中心
線まわりの回転曲面及び隅肉6に一致する面で構成され
ている。A sub-seat surface 10 having a ridge line 5 that rises from the seat surface 3 toward the screw shaft 4 around the seat surface 3 of the bolt head 2 and the root of the screw shaft 4. There is a fillet 6 that fills a corner that intersects the surface of the screw shaft 4. The auxiliary seating surface 10 and the fillet 6 have an uneven outer peripheral edge formed by eight projections 11 and valleys 12 as shown in FIG. The outer side of the outer peripheral edge falls into the plane of the seating surface 3, and the inner side is constituted by a curved surface around the screw axis center line of the ridge line 5 and a surface that matches the fillet 6.
【0010】図1〜図4に基づいてボルト1の作用を説
明する。図1において、ボルト1は雌ネジを有する部材
20に締め込まれ、部材30を緊迫する。部材30はネ
ジ軸外径よりやや大きい内径を有するボルト孔31を持
っており、ボルト1が締め込まれると、先ずボルトの副
座面10の稜線5から隅肉6にいたる範囲の曲面の一部
がボルト孔31の入り口周辺32に接触する。The operation of the bolt 1 will be described with reference to FIGS. In FIG. 1, the bolt 1 is tightened into a member 20 having a female thread, and tightens the member 30. The member 30 has a bolt hole 31 having an inner diameter slightly larger than the outer diameter of the screw shaft. When the bolt 1 is tightened, first, when the bolt 1 is tightened, one of the curved surfaces ranging from the ridge line 5 to the fillet 6 of the auxiliary seating surface 10 of the bolt is formed. The part contacts the periphery 32 of the entrance of the bolt hole 31.
【0011】さらに、締め付けが進むと、副座面10お
よび隅肉6の対応部分が、ボルト孔周辺32および被締
め付け面33に圧されて変形を始める。即ち、径方向の
締付力が作用するので、副座面の稜線および隅肉5+6
は変形してボルト孔31内に圧入され、ボルト孔31を
充満する。稜線および隅肉5+6は、ボルト孔内径面に
対してネジ軸を緊迫するので、ボルトの廻り止め効果を
発揮する。同時に充填部材(5+6)の形状は、ネジ軸
付け根の切り欠き効果を防止するに充分な効果を維持す
る。図4に示すように、ボルトの締め付けが完了した状
態の副座面10の外端は原形よりも拡張してボルト孔3
1の内径面を緊迫し、廻り止め効果を強める。Further, as the tightening proceeds, the corresponding portions of the sub seating surface 10 and the fillet 6 are pressed by the bolt hole periphery 32 and the tightened surface 33 and start to deform. That is, since the radial tightening force acts, the ridge line and the fillet 5 + 6 of the sub seat surface are provided.
Are deformed and pressed into the bolt holes 31 to fill the bolt holes 31. The ridges and fillets 5 + 6 tighten the screw shaft against the inner surface of the bolt hole, thereby exhibiting a bolt rotation preventing effect. At the same time, the shape of the filling member (5 + 6) maintains a sufficient effect to prevent the notch effect of the screw shaft root. As shown in FIG. 4, the outer end of the sub-seat surface 10 in a state where the bolts are completely tightened is expanded from the original shape to form the bolt holes 3.
Tighten the inner diameter surface of 1 to enhance the detent effect.
【0012】上記一実施例で示した他、副座面の盛り上
がり形状、ボルト頭部座面への投影形状、ネジ軸付け根
の隅肉断面形状、プラスチック材質等を撰択することに
よって、ボルトの緩み止め効果とボルトの強化効果を調
整出来るのは言うまでもない。図2では、副座面10の
谷12がネジ軸4の外径に接しているが、これを離すこ
とも可能である。また図5のごとく、副座面の平面投影
形状を鋭角を持つ星形14にしたり、実施例の図2に示
す凹凸形との混成形にすることも可能である。頂上数は
任意でよく、偶数にも奇数にも限定されない。副座面の
側面形状を、図1に示す稜線5と隅肉6の合成によら
ず、Rフィレットによる隅肉のみで形成することも可能
である。図1の実施例では、稜線5のボルト頭部座面3
からの立ち上がり点、即ち図2の頂上11の最外端を座
面3に一致させたが、副座面の最外端に厚みを与えるた
めに、段差をもって始めることも可能である。有効ネジ
は、隅肉6のネジ軸の表面への接合部まで成形する他、
用途に応じて接合部から後退させ、ネジを有さない軸部
を設けることも出来る。In addition to the above-described embodiment, the swelling shape of the auxiliary seating surface, the projection shape to the seating surface of the bolt head, the fillet cross-sectional shape of the screw shaft root, the plastic material, and the like are selected. It goes without saying that the locking effect and the strengthening effect of the bolt can be adjusted. In FIG. 2, the valley 12 of the auxiliary seating surface 10 is in contact with the outer diameter of the screw shaft 4, but this can be separated. As shown in FIG. 5, it is also possible to make the planar projection shape of the auxiliary seating surface into a star shape 14 having an acute angle, or to form a mixture with the uneven shape shown in FIG. 2 of the embodiment. The number of peaks may be arbitrary and is not limited to even or odd numbers. The side surface shape of the sub seating surface can be formed only by the fillet formed by the R fillet, not by combining the ridge line 5 and the fillet 6 shown in FIG. In the embodiment shown in FIG.
2, ie, the outermost end of the top 11 in FIG. 2 coincides with the seating surface 3, but it is also possible to start with a step to give the outermost end of the sub seating surface a thickness. The effective screw is formed up to the joint of the fillet 6 to the surface of the screw shaft.
Depending on the application, a shaft portion that does not have a screw can be provided by being retracted from the joint portion.
【0013】[0013]
【考案の効果】本考案により、付け根部に発生していた
応力集中を防止して強度を高めたプラスチックボルトを
提供することができた。しかも、小径ボルトへの移行を
可能にすると共に、ボルトの緩み止め効果を内蔵させて
通常併用されるボルトの廻り止め部品を廃止し、締結部
材のコスト低減をはかることができる。According to the present invention, it is possible to provide a plastic bolt having an increased strength by preventing stress concentration occurring at the base. In addition, it is possible to shift to small-diameter bolts, and to eliminate the bolt locking parts that are commonly used together with a built-in bolt locking effect, thereby reducing the cost of the fastening member.
【図1】プラスチックボルトの側面図である。FIG. 1 is a side view of a plastic bolt.
【図2】プラスチックボルト頭部座面の平面図である。FIG. 2 is a plan view of a seat surface of a plastic bolt head.
【図3】プラスチックボルト頭部座面とネジ軸付け根部
分の拡大側面図である。FIG. 3 is an enlarged side view of a plastic bolt head seat surface and a screw shaft root portion;
【図4】プラスチックボルト頭部副座面のボルト締め付
け後の平面図である。FIG. 4 is a plan view of a sub-seat surface of a plastic bolt head after bolt fastening.
【図5】プラスチックボルト頭部副座面の他の実施形状
例の平面図である。FIG. 5 is a plan view of another embodiment of a plastic bolt head sub seating surface.
1・・プラスチックボルト 2・・ボルト頭部 3・・ボルト頭部の座面 4・・ネジ軸 5・・副座面の稜線 6・・隅肉 7・・締め付け工具溝 10・・副座面 11・・副座面の頂上 12・・副座面の谷 20、30・・被締め付け部材 31・・ボルト孔 32・・ボルト孔周辺 33・・被締め付け面 1. Plastic bolt 2. Bolt head 3. Bolt head seat surface 4. Screw shaft 5. Sub-seat surface ridge line 6. Fillet 7. Tightening tool groove 10. Sub-seat surface 11. Top of sub seating surface 12. Valley of sub seating surface 20, 30, member to be tightened 31, bolt hole 32, around bolt hole 33, surface to be tightened
フロントページの続き (58)調査した分野(Int.Cl.6,DB名) F16B 35/00 F16B 39/282Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) F16B 35/00 F16B 39/282
Claims (1)
て、ボルト頭部の座面のネジ軸の付け根周囲に、ボルト
頭部の座面からネジ軸の表面に向かって盛り上がる副座
面を設け、当該副座面の外周縁のボルト頭部の座面への
投影形状が任意の頂上数を持つ凹凸形状となし、副座面
の外周縁より外側はボルト頭部の座面と一致した平面で
囲まれ、内側はボルト頭部座面よりも盛り上がった面で
構成されており、副座面がネジ軸の表面と交差する部分
では副座面が曲面によってネジ軸表面に入る隅肉を構成
することを特徴とするプラスチックボルト。In a bolt made of plastic, a sub-seat surface protruding from the seat surface of the bolt head toward the surface of the screw shaft is provided around the base of the screw shaft on the seat surface of the bolt head. The projected shape of the outer peripheral edge of the bearing surface onto the bearing surface of the bolt head is an uneven shape with an arbitrary number of peaks, and the outer side of the outer peripheral edge of the sub-bearing surface is surrounded by a plane that matches the bearing surface of the bolt head. , The inner side is composed of a surface raised from the seat surface of the bolt head, and in the part where the sub seat surface intersects the surface of the screw shaft, the sub seat surface forms a fillet that enters the screw shaft surface by a curved surface. Features plastic bolts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1992089278U JP2579389Y2 (en) | 1992-12-28 | 1992-12-28 | Plastic bolt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1992089278U JP2579389Y2 (en) | 1992-12-28 | 1992-12-28 | Plastic bolt |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0653809U JPH0653809U (en) | 1994-07-22 |
JP2579389Y2 true JP2579389Y2 (en) | 1998-08-27 |
Family
ID=13966263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1992089278U Expired - Lifetime JP2579389Y2 (en) | 1992-12-28 | 1992-12-28 | Plastic bolt |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2579389Y2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7708834B2 (en) | 2004-11-02 | 2010-05-04 | Tokyo Electron Limited | Bolt and plasma processing apparatus provided with same |
JP2016080158A (en) * | 2014-10-16 | 2016-05-16 | 泰久 榎本 | Screw with looseness prevention washer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4831055B2 (en) * | 2007-11-15 | 2011-12-07 | トヨタ紡織株式会社 | Drain mechanism of fluid filter |
-
1992
- 1992-12-28 JP JP1992089278U patent/JP2579389Y2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7708834B2 (en) | 2004-11-02 | 2010-05-04 | Tokyo Electron Limited | Bolt and plasma processing apparatus provided with same |
JP2016080158A (en) * | 2014-10-16 | 2016-05-16 | 泰久 榎本 | Screw with looseness prevention washer |
Also Published As
Publication number | Publication date |
---|---|
JPH0653809U (en) | 1994-07-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980428 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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