JPH03268934A - Manufacture of core material for steering wheel - Google Patents
Manufacture of core material for steering wheelInfo
- Publication number
- JPH03268934A JPH03268934A JP6874790A JP6874790A JPH03268934A JP H03268934 A JPH03268934 A JP H03268934A JP 6874790 A JP6874790 A JP 6874790A JP 6874790 A JP6874790 A JP 6874790A JP H03268934 A JPH03268934 A JP H03268934A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- core metal
- staple fibers
- content
- core
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000011162 core material Substances 0.000 title abstract description 49
- 239000002184 metal Substances 0.000 claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 claims abstract description 38
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 31
- 239000000057 synthetic resin Substances 0.000 claims abstract description 31
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims abstract description 9
- 239000002023 wood Substances 0.000 claims 1
- 239000007924 injection Substances 0.000 abstract description 10
- 238000002347 injection Methods 0.000 abstract description 10
- 238000001746 injection moulding Methods 0.000 abstract description 9
- 239000004033 plastic Substances 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 abstract description 5
- 239000004743 Polypropylene Substances 0.000 abstract description 4
- -1 polypropylene Polymers 0.000 abstract description 4
- 229920001155 polypropylene Polymers 0.000 abstract description 4
- 239000004677 Nylon Substances 0.000 abstract description 3
- 229920001778 nylon Polymers 0.000 abstract description 3
- 229920000728 polyester Polymers 0.000 abstract description 3
- 230000035939 shock Effects 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000012763 reinforcing filler Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Steering Controls (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、自動車等のステアリングホイールの芯材の製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing a core material for a steering wheel of an automobile or the like.
（従来の技術）
自動車等のステアリングホイールにおいては、軽量化や
十分な強度等が要求される。(Prior Art) Steering wheels for automobiles and the like are required to be lightweight and have sufficient strength.
このようなステアリングホイールとして、従来、例えば
特開昭５７−３３０６７号公報に示されるように、金属
芯材を用いずに、ガラス、カーボン等の繊維を合成樹脂
中に混入して射出成形したものが知られている。Conventionally, such steering wheels have been made by injection molding by mixing fibers such as glass or carbon into synthetic resin without using a metal core material, as shown in Japanese Patent Application Laid-Open No. 57-33067. It has been known.
このステアリングホイールは、軽量化と共に、強度を向
上させたものであるが、このステアリングホイールに車
両事故等で運転者が撃突して衝撃力が作用した際、強度
を極めて大きくしである場合には、ステアリングホイー
ルでの塑性変形がなく、ステアリングシャフトでのみ衝
撃の吸収を行なわなければならず、また、衝撃によって
いきなりクラックが生じやすく、安全性に問題がある。This steering wheel is lightweight and has improved strength, but when a driver collides with this steering wheel in a car accident and an impact force is applied, the strength is extremely increased. In this case, there is no plastic deformation in the steering wheel, and the shock must be absorbed only in the steering shaft.Furthermore, the shock easily causes cracks, which poses a safety problem.
また、従来、実開昭５９−１７２０６７号公報に示され
るように、中空バイブ状のリム部内に補強充填材を固体
状態に充填したものがある。そして、この補強充填材と
して、石膏、軽量コンクリート苓の無機物、エポキシ樹
脂、硬質ウレタン樹脂、液状ポリアミド樹脂等の合成樹
脂、これらの発泡体、または、これらにもみがら、繊維
くず、紙くず等の有機物を混合したもの等を用いること
が示されているが、これはリング状のリム部の外周にポ
リプロピレン樹脂、ポリ塩化ビニル樹脂等の合成樹脂を
射出成形で被覆する際、リム部が射出圧によって変形し
ないようにしたものであるにすぎない。Furthermore, as shown in Japanese Utility Model Application Laid-Open No. 59-172067, there is a device in which a reinforcing filler is filled in a solid state in a rim portion of a hollow vibrator. As the reinforcing filler, gypsum, inorganic materials such as lightweight concrete, synthetic resins such as epoxy resin, hard urethane resin, and liquid polyamide resin, foams of these materials, or organic materials such as rice husks, fiber scraps, and paper scraps are added to these materials. However, when coating the outer periphery of a ring-shaped rim with synthetic resin such as polypropylene resin or polyvinyl chloride resin by injection molding, the rim part is damaged by the injection pressure. It's just something that prevents it from deforming.
（発明が解決しようとする課題）
上記のように、従来の軽量化や強度の向上を行なうステ
アリングホイールにおいては、安全性になお問題がある
。(Problems to be Solved by the Invention) As described above, there are still problems with safety in conventional steering wheels that have been reduced in weight and improved in strength.
本発明は、このような問題を解決しようとするもので、
強度的に十分強く、安全性を向上できるステアリングホ
イールの芯材の製造方法を提供することを目的とする。The present invention aims to solve such problems,
An object of the present invention is to provide a method for manufacturing a core material for a steering wheel that is sufficiently strong in terms of strength and can improve safety.
（課題を解決するための手段）
本発明のステアリングホイールの芯材の製造方法は、ガ
ラス、カーボン等の補強用短繊維を含有率３０〜５０％
で合成樹脂に混入し、これを周面に多数の微細な開口部
を形成した中空状の芯金内に注入し、この注入された合
成樹脂の一部を、上記周面の開口部から芯金の周囲に押
し出すことによって、芯金内の合成樹脂に混入されてい
るガラス、カーボン等の補強用短繊維の含有率を５０〜
８０％とするものである。(Means for Solving the Problems) The method for manufacturing the steering wheel core material of the present invention includes reinforcing short fibers such as glass and carbon at a content of 30 to 50%.
This is mixed into a synthetic resin and injected into a hollow core metal with many minute openings formed on the circumference, and a part of the injected synthetic resin is poured into the core through the openings on the circumference. By extruding it around the gold, the content of reinforcing short fibers such as glass and carbon mixed in the synthetic resin in the core metal can be reduced to 50 to 50%.
It shall be 80%.
（作用）
本発明では、合成樹脂の充填時には、補強用短繊維の含
有率が３０〜５０％であるので、スムーズに射出成形す
ることができ、そして、中空状の芯金内から網目、貫通
孔、スリット等による開口部により合成樹脂の一部を押
し出して芯材内に補強用短繊維を残留させ、その含有率
を５０〜８０％とすることにより、強度の向上を計る。(Function) In the present invention, when filling the synthetic resin, the content of reinforcing short fibers is 30 to 50%, so injection molding can be performed smoothly. Strength is improved by extruding a portion of the synthetic resin through openings such as holes and slits, leaving reinforcing short fibers in the core material, and adjusting the content to 50 to 80%.
また、中空状の芯金によって、衝撃力が加わった際の塑
性変形が可能である。Furthermore, the hollow core metal allows for plastic deformation when an impact force is applied.
（実施例） 以下、本発明の一実施例を図面を参照して説明する。(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図、第２図及び第３図において、１は芯金で、この
芯金１は、それぞれ金網によって上下２つ割形状に形成
されたアッパー芯体２とロアー芯体３とからなり、この
アッパー芯体２とロアー芯体３の両側に突設されたフラ
ンジ部４，５が互いに抵抗溶接等で接合固定され、内部
が中空状となっている。In FIGS. 1, 2, and 3, 1 is a core metal, and this core metal 1 consists of an upper core body 2 and a lower core body 3, each of which is formed into an upper and lower halves of a wire mesh. Flange portions 4 and 5 protruding from both sides of the upper core body 2 and lower core body 3 are joined and fixed to each other by resistance welding or the like, and the interior thereof is hollow.
また、この芯金１はリング状のリム部６、スポーク部７
及びボス部８が内部の中空部が連通した連続一体に形成
され、このボス部８にはステアリングシャフトに嵌着さ
れる金属製のボス９が溶接固定されている。Further, this core metal 1 includes a ring-shaped rim portion 6 and spoke portions 7.
A boss portion 8 is formed continuously and integrally with an internal hollow portion communicating with each other, and a metal boss 9 that is fitted onto the steering shaft is welded and fixed to the boss portion 8.
また、上記中空状の芯金１のリム部６、スポーク部７、
ボス部８の全面の周面に金網の網目によって多数の微細
な開口部１０が形成され、かつ、スポーク部７には補強
用短繊維を混入した合成樹脂を射出注入する注入口１１
が形成されている。In addition, the rim portion 6 of the hollow core metal 1, the spoke portions 7,
A large number of fine openings 10 are formed on the entire circumferential surface of the boss portion 8 using wire mesh, and the spoke portion 7 has an injection port 11 through which synthetic resin mixed with reinforcing short fibers is injected.
is formed.
そして、ガラス、カーボン等の補強用短繊維の含有率が
３０〜５０％となるようにポリプロピレン、ナイロン、
ポリエステル等の合成樹脂に混入し、これを上記中空状
の芯金１内に注入口１１から注入して射出成形する。こ
の射出成形時には、第４図（１）に示すように、補強用
短繊維Ｉ２を混入した合成樹脂１３は芯金１の中空部に
充填されるが、この注入された合成樹脂１３の一部は、
注入圧によって芯金１の周面の網目による開口部１０か
ら芯金１の周囲に押し出される。なお、この際、開口部
１０から補強用短繊維１２も外方に少し通過する。射出
成形後には、第４図（ｂ）に示すように、芯金１内の合
成樹脂１３に混入されているガラス、カーボン等の補強
用短繊維１２の含有率が５０〜８０％と上昇する。この
ように、芯材は、ガラス、カーボン等の補強用短繊維１
２をポリプロピレン、ナイロン、ポリエステル等の合成
樹脂１３に混入したものを、中空状の芯金１内に充填固
化させたものである。Then, polypropylene, nylon,
It is mixed into a synthetic resin such as polyester, and is injected into the hollow core metal 1 through the injection port 11 for injection molding. During this injection molding, as shown in FIG. 4 (1), the synthetic resin 13 mixed with reinforcing short fibers I2 is filled into the hollow part of the core bar 1, but a portion of the injected synthetic resin 13 is teeth,
Due to the injection pressure, it is pushed out around the core metal 1 through the opening 10 formed by the mesh on the peripheral surface of the core metal 1. At this time, the reinforcing short fibers 12 also pass slightly outward from the opening 10. After injection molding, as shown in FIG. 4(b), the content of reinforcing short fibers 12 such as glass or carbon mixed in the synthetic resin 13 in the core metal 1 increases to 50 to 80%. . In this way, the core material is made of reinforcing short fibers such as glass or carbon.
2 mixed into a synthetic resin 13 such as polypropylene, nylon, polyester, etc. is filled and solidified into a hollow core metal 1.
この場合、強度的に満足できる補強用短繊維１２の含有
率は５０〜８０％である。しかし、このような高含有率
の合成樹脂は流動性が極めて悪く、射出成形が困難であ
る。すなわち、中空状の芯金１内の全周に充填すること
が極めて困難で、成形金型のゲートをいためたりし、量
産できない。In this case, the content of reinforcing short fibers 12 that is satisfactory in terms of strength is 50 to 80%. However, such high-content synthetic resins have extremely poor fluidity and are difficult to injection mold. That is, it is extremely difficult to fill the entire circumference of the hollow core metal 1, which may damage the gate of the molding die, making mass production impossible.
そこで、前記のように、射出成形可能な範囲である補強
用短繊維１２の含有率が３０〜５０％の合成樹脂を射出
して、合成樹脂は通過するが、補強用短繊維１２は通過
しない、または通過しにくい開口部１０、すなわち、金
網の網目を有する芯金１を用いることで、中空状の芯金
１内に補強用短繊維１２を残すようにして、その含有率
を５０〜８０％に高めるものである。Therefore, as described above, a synthetic resin with a reinforcing short fiber 12 content of 30 to 50%, which is within the range that can be injection molded, is injected, and the synthetic resin passes through, but the reinforcing short fiber 12 does not pass through. , or by using a core metal 1 having an opening 10 that is difficult to pass through, that is, a wire mesh, the short reinforcing fibers 12 are left in the hollow core metal 1, and the content thereof is 50 to 80%. %.
このように、金網からなる中空状の芯金１内に補強用短
繊維１２を有する合成樹脂１３を充填して一体化するこ
とにより、軽量であると共に、強度が非常に強く、かつ
、中空状の金網による芯金１によって、衝撃力が加わっ
た際の塑性変形が可能となる。In this way, by filling and integrating the synthetic resin 13 having reinforcing short fibers 12 into the hollow core bar 1 made of wire mesh, the hollow core bar 1 is lightweight, extremely strong, and has a hollow shape. The core metal 1 made of wire mesh enables plastic deformation when an impact force is applied.
次に、第５図に示す実施例は、中空状の芯金１を、多数
の小径の貫通孔による開口部１０を形成したパンチング
メタルで形成したものである。Next, in the embodiment shown in FIG. 5, a hollow core metal 1 is formed of punched metal in which openings 10 are formed by a large number of small-diameter through holes.
また、第６図に示す実施例は、中空状の芯金１を、多数
のスリットによる開口部１０を形成したスリットメタル
で形成したものである。In the embodiment shown in FIG. 6, a hollow core metal 1 is formed of slit metal in which openings 10 are formed by a large number of slits.
これら第５図及び第６図の実施例によっても、前記の同
様に射出成形することができる。The embodiments shown in FIGS. 5 and 6 can also be injection molded in the same manner as described above.
次に、上記各実施例における補強用短繊維１２及び芯金
１の開口部１０の寸法の一例を示す。Next, an example of the dimensions of the reinforcing short fibers 12 and the openings 10 of the core bar 1 in each of the above embodiments will be shown.
補強用短繊維１２は、直径０．１〜０５閣で、長さ３〜
５日に形成する。The reinforcing short fibers 12 have a diameter of 0.1~0.5 mm and a length of 3~
Form on the 5th.
これに対する第１の実施例における金網の網目による開
口部ｌＯは、直径０．５＋＋ａの針金により２４メツシ
ユ、すなわち、−辺の長さが０．５６ｍｍの正方形状の
空間によって形成する。On the other hand, the opening lO formed by the wire mesh in the first embodiment is formed by 24 meshes of wire with a diameter of 0.5++a, that is, a square space with a negative side length of 0.56 mm.
また、第２の実施例におけるパンチングメタルの貫通孔
による開口部１０は、直径０，８Ｉの円孔を１０１ｍ１
＋ピツチで穿設する。In addition, the opening 10 formed by the through hole of the punching metal in the second embodiment is a circular hole with a diameter of 0.8I and a diameter of 101 m1.
+Drill with pitch.
また、第３の実施例におけるスリットメタルのスリット
による開口部１０は、幅０．１〜０．５−１長さ２〜４
−で穿設する。Further, the opening 10 formed by the slit of the slit metal in the third embodiment has a width of 0.1 to 0.5-1 and a length of 2 to 4.
- to drill.
このような関係寸法に設定することにより、芯金１内に
補強用短繊維Ｉ２を多く残して、開口部１０から合成樹
脂が押し出される。By setting such related dimensions, the synthetic resin is extruded from the opening 10 while leaving a large amount of reinforcing short fibers I2 in the core bar 1.
また、前記各実施例では、芯金１は、リム部６、スポー
ク部７及びボス部８を連続一体に形成しているが、これ
らの各部をそれぞれ別個に分割形成し、連結具や接着等
で一体的に連結してもよい。この場合、その接合個所の
外面にプリグレムを巻着して加熱により一体化してもよ
い。また、リム部６のみまたはスポーク部７のみに補強
用短繊維１２を混入した合成樹脂１３を充填固化しても
よい。Furthermore, in each of the above embodiments, the core metal 1 has the rim portion 6, the spoke portions 7, and the boss portion 8 formed continuously and integrally. They may be integrally connected. In this case, preglem may be wrapped around the outer surface of the joint and integrated by heating. Alternatively, only the rim portion 6 or the spoke portions 7 may be filled and solidified with the synthetic resin 13 mixed with reinforcing short fibers 12.
なお、上記の芯金１の外側に外装材を被覆して、ステア
リングホイールを形成する。Note that a steering wheel is formed by covering the outside of the core metal 1 with an exterior material.
本発明によれば、合成樹脂の充填時には、補強用短繊維
の含有率が３０〜５０％であるので、スムーズに射出成
形することができ、そして、中空状の芯金内から網目、
貫通孔、スリット等による開口部により合成樹脂の一部
を押し出して芯材内に補強用短繊維を残留させ、その含
有率を５０〜８０％とすることにより、強度の向上を計
ることができる。また、中空状の芯金によって、衝撃力
が加わった際の塑性変形が可能で、安全性を向上するこ
とができる。According to the present invention, since the content of reinforcing short fibers is 30 to 50% when filling the synthetic resin, injection molding can be performed smoothly.
Strength can be improved by extruding a portion of the synthetic resin through openings such as through holes and slits, leaving reinforcing short fibers in the core material, and increasing the content to 50 to 80%. . Furthermore, the hollow core metal allows for plastic deformation when an impact force is applied, thereby improving safety.
第１図ないし第４図は本発明の一実施例を示すもので、
第１図は芯金の斜視図、第２図及び第３図はそれぞれ第
１図の一部の断面図及び斜視図、第４図は製造工程を示
す断面図、第５図及び第６図はそれぞれ本発明の他の実
施例を示す芯金の平面図である。
１・・芯金、１０・・開口部、１２・・補強用短繊維、
１３・・合成樹脂。
−峯Ａ１ユ1 to 4 show an embodiment of the present invention,
Figure 1 is a perspective view of the metal core, Figures 2 and 3 are a sectional view and perspective view of a portion of Figure 1, respectively, Figure 4 is a sectional view showing the manufacturing process, and Figures 5 and 6. 3A and 3B are plan views of core metals showing other embodiments of the present invention, respectively. 1. Core bar, 10. Opening, 12. Reinforcing short fiber,
13...Synthetic resin. -Mine A1 Yu
Claims (1)
〜５０％で合成樹脂に混入し、 これを周面に多数の微細な開口部を形成した中空状の芯
金内に注入し、 この注入された合成樹脂の一部を、上記周面の開口部か
ら芯金の周囲に押し出すことによって、芯金内の合成樹
脂に混入されているガラス、カーボン等の補強用短繊維
の含有率を５０〜８０％とする ことを特徴とするステアリングホイールの芯材の製造方
法。(1) Contains reinforcing short fibers such as glass and carbon at a content rate of 30
~50% of the synthetic resin is mixed into the synthetic resin, and this is injected into a hollow core metal with many fine openings formed on the circumference. A steering wheel core characterized in that the content of reinforcing short fibers such as glass or carbon mixed in the synthetic resin in the core metal is 50 to 80% by extruding it from the core to the periphery of the core metal. Method of manufacturing wood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6874790A JPH03268934A (en) | 1990-03-19 | 1990-03-19 | Manufacture of core material for steering wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6874790A JPH03268934A (en) | 1990-03-19 | 1990-03-19 | Manufacture of core material for steering wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03268934A true JPH03268934A (en) | 1991-11-29 |
Family
ID=13382679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6874790A Pending JPH03268934A (en) | 1990-03-19 | 1990-03-19 | Manufacture of core material for steering wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03268934A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020001135A (en) * | 2000-06-26 | 2002-01-09 | 밍 루 | Manufacturing process of steering column bracket |
| US6575054B2 (en) * | 2000-03-30 | 2003-06-10 | Nihon Plast Co., Ltd. | Core bar for steering wheels |
| US6622590B2 (en) * | 2000-03-15 | 2003-09-23 | Nihon Plast Co., Ltd. | Core bar for steering wheels |
| JP2010095208A (en) * | 2008-10-20 | 2010-04-30 | Nsk Ltd | Steering shaft |
-
1990
- 1990-03-19 JP JP6874790A patent/JPH03268934A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6622590B2 (en) * | 2000-03-15 | 2003-09-23 | Nihon Plast Co., Ltd. | Core bar for steering wheels |
| US6575054B2 (en) * | 2000-03-30 | 2003-06-10 | Nihon Plast Co., Ltd. | Core bar for steering wheels |
| EP1138574A3 (en) * | 2000-03-30 | 2004-03-24 | Nihon Plast Co., Ltd. | Core bar for steering wheels |
| KR20020001135A (en) * | 2000-06-26 | 2002-01-09 | 밍 루 | Manufacturing process of steering column bracket |
| JP2010095208A (en) * | 2008-10-20 | 2010-04-30 | Nsk Ltd | Steering shaft |
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