JPH06142232A - Forming method badminton racket frame - Google Patents
Forming method badminton racket frameInfo
- Publication number
- JPH06142232A JPH06142232A JP4324791A JP32479192A JPH06142232A JP H06142232 A JPH06142232 A JP H06142232A JP 4324791 A JP4324791 A JP 4324791A JP 32479192 A JP32479192 A JP 32479192A JP H06142232 A JPH06142232 A JP H06142232A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- frame
- racket frame
- prepreg
- core body
- 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
- Moulding By Coating Moulds (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、バドミントン用ラケッ
トフレーム(以下ラケットフレームと省略する)の成形
方法に関するものであり、更に詳しくは、フレームとシ
ャフトを連結する結合部材からグリップまでを一体的に
成形する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a racket frame for badminton (hereinafter abbreviated as a racket frame), and more specifically, a connecting member connecting a frame and a shaft to a grip are integrally formed. The present invention relates to a molding method.
【0002】[0002]
【従来の技術】従来からのラケットフレームの成形方法
としては、フレームとシャフトに相当する長さの伸縮自
在のチューブに、予め繊維に樹脂を含浸させて半硬化状
態にしたプリプレグを被覆してから成形型に入れ、この
チューブに空気を圧入して、被覆したプリプレグを成形
型に圧着させ加熱成形して、フレームとシャフトを一体
に成形する方法や、予めフレームとシャフトを別体に成
形しておき、両者を略T字形の結合部材で連結してラケ
ットフレームとする方法などが公知である。2. Description of the Related Art As a conventional racket frame forming method, a stretchable tube having a length corresponding to a frame and a shaft is coated with a prepreg which has been preliminarily impregnated with resin into a semi-cured state. Put in a molding die, pressurize air into this tube, press the coated prepreg to the molding die and heat-mold it, and form the frame and shaft integrally, or preform the frame and shaft separately. It is known that the racket frame is formed by connecting the two with a substantially T-shaped connecting member.
【0003】現在では、フレームとシャフトとの連結に
結合部材を使用する構造のものが一般的であり、このよ
うなラケットフレームを成形するには、図4に示すよう
に、予めフレーム12とシャフト13をFRP(繊維強
化プラスチック)やアルミニウムなどでパイプ形状に形
成し、金属等で形成した略T字形の結合部材15の水平
支部15aをフレーム両端の開口部12a、12aに挿
入し、シャフト端部には前記結合部材の垂直支部15b
を挿入して連結してある。また、その外側をFRP等の
補強材20で被覆して硬化成形することにより連結部を
補強している。At present, a structure in which a connecting member is used to connect the frame and the shaft is generally used. To mold such a racket frame, as shown in FIG. 4, the frame 12 and the shaft are previously prepared. 13 is formed of FRP (fiber reinforced plastic) or aluminum into a pipe shape, and the horizontal support portion 15a of the substantially T-shaped coupling member 15 formed of metal or the like is inserted into the openings 12a and 12a at both ends of the frame, and the shaft end portion is formed. The vertical support portion 15b of the coupling member is
Are inserted and connected. Also, the outside is covered with a reinforcing material 20 such as FRP and cured to reinforce the connecting portion.
【0004】[0004]
【発明が解決しようとする課題】上記従来のラケツトフ
レームは、フレーム12とシャフト13の管の内側に介
在させた結合部材15と、その外側にFRPの補強材2
0を被覆する構成としたことにより、その目的である、
連結部の機械的耐久性の向上及び、風圧面積の狭小化を
ある程度可能にすることができた。しかしながら、予め
各部材を成形しておく工程や、各部材を結合材で連結す
る工程などに手間がかかるものであった。In the conventional racket frame, the connecting member 15 is provided inside the pipes of the frame 12 and the shaft 13, and the FRP reinforcing member 2 is provided outside the connecting member 15.
The purpose is to cover 0,
It was possible to improve the mechanical durability of the connecting portion and narrow the wind pressure area to some extent. However, it takes time and effort to form each member in advance and to connect each member with a binder.
【0005】また、結合部材に、機械的強度のある金属
材料を用いているため、重量の軽減が十分でないほか、
シャフトがFRP製の場合などには、シャフトと結合部
材との両者間の機械的強度やしなりの相違が、フレーム
とシャフトの各々のしなりに対してうまく追随できない
原因ともなっていた。そのほか、シャフトをFRP製な
どで成形しておき、結合部材で連結ごFRPの補強材を
被覆し、成形型に再度配置して加熱加圧硬化させるた
め、前記二次成形により、フレームあるいはシャフトに
熱履歴による物性的な劣化や材質的な変化を生じ、剛さ
などに影響を及ぼす恐れがあった。そこで本発明は、上
記従来の欠点に鑑み、FRP製のシャフトとフレームか
らなるラケットフレームの成形方法において、前記シャ
フトを成形する際に、前記シャフトとフレームを連結す
るための結合部材を同時成形することにより、フレーム
とシャフトをより強固に連結せしめてラケットフレーム
を成形する方法を提供しょうとするものである。Further, since a metal material having mechanical strength is used for the connecting member, the weight is not sufficiently reduced, and
When the shaft is made of FRP or the like, the difference in mechanical strength and bending between the shaft and the coupling member has also been a cause of failure to follow the bending of each of the frame and the shaft. In addition, the shaft is made of FRP, etc., the reinforcing material of the connected FRP is covered with the joining member, and it is placed again in the molding die to be heated and pressed to be hardened. There was a risk that the physical properties would be deteriorated and the material would be changed due to the heat history, which could affect the rigidity. Therefore, in view of the above-mentioned conventional drawbacks, the present invention is a method for forming a racket frame including a shaft and a frame made of FRP, and at the time of forming the shaft, simultaneously forms a connecting member for connecting the shaft and the frame. Therefore, it is intended to provide a method for forming a racket frame by more firmly connecting the frame and the shaft.
【0006】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明は以下の成形方法とした。即ち、フレーム
とシャフト及びグリップからなるラケットフレームの成
形方法において、伸縮自在のチューブに、予め繊維に樹
脂を含浸させ半硬化状態にしたプリプレグを巻きつけ、
シャフトとグリップの長さに相当する長さのシャフト成
形体を形成し、かつその先端を伸長させて延長部を設け
る一方、棒状に形成した発泡体の芯体をプリプレグで被
覆して形成した結合部材を、前記延長部で前記結合部材
の中央部分を被覆してシャフト成形体の先端に連接さ
せ、前記結合部材の両端を、予めパイプで打球面形状に
形成したフレームの、シャフトとの連結部に設けた両端
開口部の内側に挿入してラケットフレーム形状にし、そ
れを成形型内に配置し、成形型を閉じて、グリップ端部
から圧縮空気などを注入してチューブを膨張させ、成形
用プリプレグを成形型に圧着させ、加熱加圧して結合部
材の芯体を二次発泡させながら成形することを特徴とす
るバドミントン用ラケットフレームの成形方法である。In order to achieve the above object, the present invention has the following molding method. That is, in the method of forming a racket frame including a frame, a shaft, and a grip, a stretchable tube is wrapped with a prepreg which is a semi-cured state obtained by previously impregnating fibers with resin,
Bonding formed by forming a shaft molded body having a length corresponding to the length of the shaft and the grip, and extending the tip to provide an extension portion, while covering the rod-shaped foam core body with a prepreg. The member covers the central portion of the coupling member with the extension portion and is connected to the tip of the shaft molded body, and both ends of the coupling member are connected to the shaft of the frame in which the both ends of the coupling member are formed in the ball striking face shape in advance. Insert it into the inside of the opening on both ends to make a racket frame shape, place it in the mold, close the mold, inject compressed air etc. from the grip end to expand the tube, This is a method for molding a racket frame for badminton, characterized in that the prepreg is pressure-bonded to a molding die and is heated and pressed to secondary-foam the core body of the coupling member.
【0007】[0007]
【作用】上記のように、本発明の方法によれば、シャフ
トと、前記シャフトとフレームを連結する結合部材を一
体に成形すると同時にフレームとシャフトを連結してラ
ケットフレームを形成する方法であることから、一度の
成形によりラケットフレームとすることができ、作業工
程が簡略化される。更に、本発明の方法によれば、加熱
加圧した際に、結合部材の芯体を二次発泡させながら成
形するため、FRP結合材自体に内圧がかかり、フレー
ムとの結合密着がより強固になるとともに、連結部が滑
らかに形成できるものである。また、従来のように、硬
化成形済のシャフトとフレームを連結するために、結合
部材を用いて再度加熱加圧成形する必要がないため、F
RPなどの部材が熱履歴により、物性的に劣化したり、
材質が変化するといった恐れもない。また、結合材とシ
ャフトは、同じ材料で成形されるため、シャフトからフ
レームにかけての弾性率が連続することから、ラケット
フレームのしなりやフレックスの設計の自由度が向上す
る。As described above, according to the method of the present invention, the shaft and the connecting member for connecting the shaft and the frame are integrally formed, and at the same time, the frame and the shaft are connected to form the racket frame. Therefore, the racket frame can be formed by molding once, and the working process is simplified. Further, according to the method of the present invention, since the core body of the joining member is formed while being secondarily foamed when heated and pressurized, an internal pressure is applied to the FRP binding material itself, and the bonding and adhesion with the frame is further strengthened. In addition, the connecting portion can be formed smoothly. Further, unlike the conventional case, it is not necessary to heat and press-mold again by using a coupling member in order to connect the hardened and molded shaft to the frame.
Physical properties of members such as RP deteriorate due to heat history,
There is no fear that the material will change. Further, since the binding material and the shaft are formed of the same material, the elastic modulus from the shaft to the frame is continuous, so that the flexibility of the racket frame bending and the flex design is improved.
【0008】[0008]
【実施例】以下、この発明を実施例に基づき説明する。
図1〜図2に示すように、図1は本発明の方法により形
成されたラケットフレーム1で、フレーム2、シャフト
3、グリップ4、及び前記フレームとシャフトを連結す
る結合部材5から構成されている。フレーム2は例え
ば、アルミニウム等の素材からなるパイプで形成され、
シャフトと連結される両端部には、開口部2a、2aが
設けられている。シャフト3は、カーボン繊維等のFR
Pで形成され、その先端部には、結合部材5がシャフト
成形用のFRPの延長部3Bによって連接されている。EXAMPLES The present invention will be described below based on examples.
1 and 2, FIG. 1 shows a racket frame 1 formed by the method of the present invention, which comprises a frame 2, a shaft 3, a grip 4, and a connecting member 5 connecting the frame and the shaft. There is. The frame 2 is formed of a pipe made of a material such as aluminum,
Openings 2a, 2a are provided at both ends connected to the shaft. Shaft 3 is made of FR such as carbon fiber
The connecting member 5 is formed of P, and the connecting member 5 is connected to the distal end of the connecting member 5 by the FRP extension 3B for shaft molding.
【0009】結合部材5は、発泡体の芯体6の外側に、
シャフト成形用材料と同様のFRP結合材5aが積層形
成されている。前記結合部材5の芯体6は、加熱により
二次発泡する材料、たとえばEVA、熱可塑性ポリエス
テル樹脂発泡体、スチロール系発泡体などが好ましく、
その芯体6を被覆するFRP結合材5aは、スリーブ状
プリプレグであっても織布状プリプレグであっても良
く、結合部材5の両端部5b、5bは、二次発泡により
芯体が前記両端部分から膨出しないようにFRP結合材
5aによって閉鎖された状態であることが好ましい。The connecting member 5 is provided on the outer side of the foam core body 6,
The FRP bonding material 5a similar to the shaft molding material is laminated and formed. The core body 6 of the connecting member 5 is preferably a material that is secondary foamed by heating, such as EVA, thermoplastic polyester resin foam, and styrene foam.
The FRP binding material 5a that coats the core body 6 may be a sleeve-shaped prepreg or a woven cloth prepreg, and both end portions 5b and 5b of the coupling member 5 have a core body formed by secondary foaming. It is preferably in a state of being closed by the FRP binding material 5a so as not to bulge from the portion.
【0010】上記したラケットフレーム1を成形するに
は、まず、アルミニウムパイプをフレーム形状に曲げ加
工し、ガット挿通孔を開けておく。一方、伸縮自在のチ
ューブ7にカーボン繊維のプリプレグを被覆して、シャ
フト及びグリップの長さに相当するシャフト成形体3A
を形成する。このとき、後に結合部材成形体5Aを連接
させるために、シャフト成形体3Aの外層のプリプレグ
の先端部分を伸長させ延長部3Bを形成しておく。そし
て、発泡体で棒状の芯体6を形成し、これに一端を閉じ
たスリーブ状プリプレグを両端から被せ合わせて結合部
材成形体5Aとする。次に、シャフト成形体3Aの先端
部に結合部材成形体5Aを置き、前記シャフト成形体3
Aの先端部に延長されてあるプリプレグからなる延長部
3Bで、前記結合部材成形体5Aを被覆して両者を連接
するものである。To form the racket frame 1 described above, first, an aluminum pipe is bent into a frame shape and a gut insertion hole is opened. On the other hand, a stretchable tube 7 is coated with a prepreg of carbon fiber to form a shaft molded body 3A corresponding to the length of a shaft and a grip.
To form. At this time, in order to connect the joint member molded body 5A later, the tip portion of the prepreg in the outer layer of the shaft molded body 3A is extended to form the extension portion 3B. Then, a rod-shaped core body 6 is formed of foam, and sleeve-like prepregs having one end closed are covered from both ends to form a coupling member molded body 5A. Next, the coupling member molded body 5A is placed at the tip of the shaft molded body 3A, and the shaft molded body 3
The connecting member molded body 5A is covered with an extension portion 3B formed of a prepreg extended to the front end portion of A so as to connect the two.
【0011】その後、フレームの両端開口部2a、2a
に接着剤を塗布し、前記結合部材成形体の両端5b、5
bを挿入して成形型内に配置し、成形型を閉じて、グリ
ップ端部のチューブ端部7aから、圧縮空気等を注入し
てチューブ7を膨張させて、プリプレグを成形型内に圧
着させ、150℃、圧力5〜10Kgで20〜25分間加
熱加圧することにより、一体成形のラケットフレーム1
を成形した。結合部材5わ形成するFRP結合材5a
は、一端を閉じたスリーブ状プリプレグを両端から被せ
合わせたが、シート状プリプレグを被覆する場合は、両
端部5b、5bを縛ると良い。芯体6をプリプレグで確
実に包囲すれば、加熱成形時に、結合部材の芯体6が二
次発泡した時、FRP結合材5aを成形型やフレーム内
側に圧着するため、連結が確実となる。Then, the openings 2a, 2a at both ends of the frame are formed.
Adhesive is applied to the both ends 5b, 5
b is inserted and placed in the mold, the mold is closed, compressed air or the like is injected from the tube end 7a of the grip end to expand the tube 7, and the prepreg is crimped into the mold. The racket frame 1 integrally molded by heating and pressurizing at 150 ° C. and a pressure of 5 to 10 kg for 20 to 25 minutes.
Was molded. FRP binding material 5a forming the binding member 5
In the case of, the sleeve-like prepreg with one end closed was covered from both ends, but when covering the sheet-like prepreg, both ends 5b, 5b may be bound. If the core body 6 is securely surrounded by the prepreg, the FRP bonding material 5a is pressure-bonded to the inside of the molding die or the frame when the core body 6 of the coupling member is secondarily foamed during the heat molding, so that the connection is ensured.
【0012】[0012]
【発明の効果】以上のように、本発明の方法によれば、
シャフト及びグリップを成形する際に結合部材によりフ
レームと連続させて一体にラケットフレームを成形する
方法であるため、工程が簡素化できるとともに、従来の
ように繰り返し加熱加圧されるといったこともないた
め、フレームあるいはシャフトに熱履歴による物性的な
劣化や材質的な変化が生じることもなく、ラケットフレ
ームの耐久性が一段と向上するものである。また、結合
部材は、従来のように、シャフトを形成している素材と
は異なる材料を用いるのではなく、同一の材料を用い、
同時に加熱硬化成形するため、両者の間で弾性率が分断
されることがなく、連続したしなやかさを有するラケッ
トフレームとなる。As described above, according to the method of the present invention,
Since it is a method of molding the racket frame integrally with the frame by the connecting member when molding the shaft and the grip, the process can be simplified and there is no repeated heating and pressing unlike the conventional method. The racket frame is further improved in durability without causing physical deterioration or material change due to heat history in the frame or the shaft. Further, the connecting member does not use a material different from the material forming the shaft as in the past, but uses the same material,
Since the heat curing molding is performed at the same time, the elastic modulus is not divided between the two, and the racket frame has continuous flexibility.
【図1】本発明の方法によって成形されたラケットフレ
ームの外観正面図。FIG. 1 is an external front view of a racket frame formed by the method of the present invention.
【図2】図1のA部拡大断面説明図。FIG. 2 is an enlarged cross-sectional explanatory view of a portion A of FIG.
【図3】本発明の実施例の成形方法の概略説明図。FIG. 3 is a schematic explanatory view of a molding method according to an embodiment of the present invention.
【図4】従来のラケットフレームのフレームとシャフト
の連結部の断面説明図。FIG. 4 is an explanatory cross-sectional view of a connecting portion between a frame and a shaft of a conventional racket frame.
1 ラケットフレーム 2 フレーム 2a 開口部 3 シャフト 3A シャフト成形体 3B 延長部 4 グリップ 5 結合部材 5A 結合部材成形体 5a FRP結合材 5b 端部 6 芯体 7 チューブ 7a チューブ端部 12 フレーム 12a 開口部 13 シャフト 15 結合部材 15a 水平支部 15b 垂直支部 20 補強材 1 Racket Frame 2 Frame 2a Opening 3 Shaft 3A Shaft Form 3B Extension 4 Grip 5 Coupling Member 5A Coupling Member Forming 5a FRP Coupling 5b End 6 Core 7 Tube 7a Tube End 12 Frame 12a Opening 13 Shaft 15 Coupling member 15a Horizontal support 15b Vertical support 20 Reinforcement material
Claims (1)
るバドミントン用ラケットフレームの成形方法におい
て、伸縮自在のチューブに、予め繊維に樹脂を含浸させ
半硬化状態にしたプリプレグを巻きつけ、シャフトとグ
リップの長さに相当する長さのシャフト成形体を形成
し、かつその先端を伸長させて延長部を設ける一方、棒
状に形成した発泡体の芯体をプリプレグで被覆して形成
した結合部材を、前記延長部で前記結合部材の中央部分
を被覆してシャフト成形体の先端に連接させ、前記結合
部材の両端を、予めパイプで打球面形状に形成したフレ
ームの、シャフトとの連結部に設けた両端開口部の内側
に挿入してラケットフレーム形状にし、それを成形型内
に配置し、成形型を閉じて、グリップ端部から圧縮空気
などを注入してチューブを膨張させ、成形用プリプレグ
を成形型に圧着させ、加熱加圧して結合部材の芯体を二
次発泡させながら成形することを特徴とするバドミント
ン用ラケットフレームの成形方法。1. A method for forming a racket frame for badminton comprising a frame, a shaft and a grip, wherein a stretchable tube is wrapped with a prepreg which is preliminarily impregnated with resin into a semi-cured state, and the length of the shaft and the grip is increased. While forming a shaft molded body having a length corresponding to the above, and extending the tip to provide an extension portion, a connecting member formed by coating a rod-shaped foam core body with a prepreg is used as the extension portion. The central part of the connecting member is covered with and is connected to the tip of the shaft molded body, and both ends of the connecting member are provided on both ends of the frame, which is formed in the ball striking face shape by pipes, at the connecting part with the shaft. Insert it inside the racket frame shape, place it in the mold, close the mold, and inject compressed air etc. from the grip end tube Is expanded, the molding prepreg is pressure-bonded to a molding die, and the molding is performed while heating and pressurizing the core body of the coupling member while secondary-foaming the badminton racket frame.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4324791A JP2762006B2 (en) | 1992-11-09 | 1992-11-09 | Method of forming racket frame for badminton |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4324791A JP2762006B2 (en) | 1992-11-09 | 1992-11-09 | Method of forming racket frame for badminton |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06142232A true JPH06142232A (en) | 1994-05-24 |
JP2762006B2 JP2762006B2 (en) | 1998-06-04 |
Family
ID=18169725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4324791A Expired - Fee Related JP2762006B2 (en) | 1992-11-09 | 1992-11-09 | Method of forming racket frame for badminton |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2762006B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005161701A (en) * | 2003-12-03 | 2005-06-23 | Toho Tenax Co Ltd | Bag molding method |
JP2007068971A (en) * | 2005-09-03 | 2007-03-22 | Wilson Sporting Goods Co | Reinforcing member for badminton racket |
US7727094B2 (en) * | 2008-02-22 | 2010-06-01 | Pick-A-Paddle, Inc. | Institutional badminton racket |
CN111151610A (en) * | 2020-03-13 | 2020-05-15 | 杭州诚兴体育用品有限公司 | Frame forming machine of quick badminton racket |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5281767B2 (en) * | 2007-08-01 | 2013-09-04 | ヨネックス株式会社 | Badminton racket manufacturing method |
-
1992
- 1992-11-09 JP JP4324791A patent/JP2762006B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005161701A (en) * | 2003-12-03 | 2005-06-23 | Toho Tenax Co Ltd | Bag molding method |
JP4508618B2 (en) * | 2003-12-03 | 2010-07-21 | 東邦テナックス株式会社 | Bag molding method |
JP2007068971A (en) * | 2005-09-03 | 2007-03-22 | Wilson Sporting Goods Co | Reinforcing member for badminton racket |
US7727094B2 (en) * | 2008-02-22 | 2010-06-01 | Pick-A-Paddle, Inc. | Institutional badminton racket |
CN111151610A (en) * | 2020-03-13 | 2020-05-15 | 杭州诚兴体育用品有限公司 | Frame forming machine of quick badminton racket |
Also Published As
Publication number | Publication date |
---|---|
JP2762006B2 (en) | 1998-06-04 |
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