JPH0356902B2 - - Google Patents
Info
- Publication number
- JPH0356902B2 JPH0356902B2 JP62217039A JP21703987A JPH0356902B2 JP H0356902 B2 JPH0356902 B2 JP H0356902B2 JP 62217039 A JP62217039 A JP 62217039A JP 21703987 A JP21703987 A JP 21703987A JP H0356902 B2 JPH0356902 B2 JP H0356902B2
- Authority
- JP
- Japan
- Prior art keywords
- protective cover
- fibers
- synthetic resin
- spiral
- shape
- 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
- 239000000835 fiber Substances 0.000 claims description 37
- 230000001681 protective effect Effects 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 24
- 229920003002 synthetic resin Polymers 0.000 claims description 23
- 239000000057 synthetic resin Substances 0.000 claims description 23
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 21
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 21
- 241001330002 Bambuseae Species 0.000 claims description 21
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 21
- 239000011425 bamboo Substances 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 229920005989 resin Polymers 0.000 description 16
- 239000011347 resin Substances 0.000 description 16
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 229930182556 Polyacetal Natural products 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920006324 polyoxymethylene Polymers 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Landscapes
- Moulding By Coating Moulds (AREA)
Description
〔技術分野〕
本発明は、施盤、プレス等の各種機械の親ネジ
や、ラム、スピンドル、シリンダー、スクリユー
等の露出軸材の被覆に用いられる伸縮性保護カバ
ーに関するものである。
〔従来技術〕
従来、前記した如き露出軸材を塵埃等の異物か
ら保護したり、あるいは人体が直接軸材に接触す
ることを防止するために、軸材周囲を伸縮性保護
カバーで被覆することは知られている。このよう
な保護カバーとしては、帯状の弾性体を円錐体状
に巻いた圧縮バネ、いわゆる竹の子バネが一般に
用いられている（特開昭59−94532号公報、特公
昭50−39215号公報等）。
しかしながら、従来用いられている竹の子バネ
は、いずれも比重の大きい鋼鉄帯状材料を竹の子
状に巻成したものであるため、重量が大きく、錆
やすいという欠点がある上、バネ性及び摩擦抵抗
が強すぎるため圧縮に大きな力を要するという欠
点もあり、さらに、長尺物とした時に、比重が大
きいためにその自重により曲がりを生じるように
なり、その長さには限界があり、さらにその製造
にも困難が伴うという欠点がある。
〔目的〕
本発明は、前記欠点の克服された伸縮性保護カ
バー及びその製造方法を提供することを目的とす
る。
本発明者らは、前記従来の鋼鉄材料の竹の子バ
ネに見られる欠点を克服するために、合成樹脂素
材の竹の子バネを製造すべく種々研究を重ねた結
果、成形材料として一般に用いられている熱可塑
性樹脂を用いても満足し得る竹の子バネを得るこ
とはできず、繊維と合成樹脂とからなる繊維強化
樹脂材料を用いることによつて前記欠点の克服さ
れた竹の子バネの製造が可能になることを見出し
た。
〔構成〕
本発明によれば、第１の発明として、繊維と合
成樹脂とからなる繊維強化合成樹脂材料から構成
された管状体の管壁をスパイラル状に切断してな
るスパイラル状帯状物の上下隣接面が竹の子状に
重つており、この状態において熱処理が施されて
該竹の子状態が固定化されていることを特徴とす
る伸縮性保護カバーが提供される。
また、第２の発明として、繊維と合成樹脂とか
らなる繊維強化合成樹脂材料から構成された管状
体の管壁をスパイラル状に切断した後、得られた
スパイラル状帯状物の上下隣接面を竹の子状に重
ね、この状態において熱処理して、該竹の子状態
を固定化させることを特徴とする伸縮性保護カバ
ーの製造方法が提供される。
次に、本発明の伸縮性保護カバーを図面により
説明する。第１図は、本発明による伸縮性保護カ
バーの形状説明図であり、全体は竹の子バネ形状
を示す。１は管状体の管壁をスパイラル状に切断
してなるスパイラル状帯状物の上下隣接面が竹の
子状に重なつてスパイラル状に巻成された帯状物
を示し、繊維と合成樹脂からなる繊維強化樹脂体
から構成される。２は隣接する帯状物面の重なり
部を示す。この重なり部において、帯状物の重な
りは、竹の子バネの全体が伸びた状態において、
帯状物の巾の長さの10〜50％、好ましくは15〜30
％が重なつた状態になるようにするのがよい。ま
た、繊維強化樹脂体中の繊維含量は、30〜80容量
％、好ましくは45〜75容量％にするのがよい。ま
た、この繊維強化樹脂体の密度は、一般には、
1.3〜2.0ｇ／cm3にするのがよい。繊維として炭素
繊維を用いる場合には、繊維強化樹脂体の密度
は、1.3〜1.7ｇ／cm3、好ましくは1.5〜1.6ｇ／cm3
の範囲に規定するのがよい。
本発明においては、その成形材料としては、繊
維と合成樹脂からなる繊維強化樹脂材料が用いら
れる。この場合、繊維としては、炭素繊維、ガラ
ス繊維、アルミナ繊維等の無機繊維の他、芳香族
ポリエステル繊維、アラミド繊維等の有機繊維や
金属繊維等が単独又は組合せて用いられる。この
中でも炭素繊維は弾性が高いので好ましい。繊維
の形状は任意であり、繊維束状、織物（クロス）
状、一方向引揃え繊維状、編組物状、不織布状で
用いることができ、またそれらの組合せを用いる
ことができる。
合成樹脂としては、熱可塑性を示すもの及び熱
硬化性を示すもののいずれも使用でき、熱可塑性
を示すものとしては、ポリカーボネート、ABS
樹脂、ポリエチレンテレフタレート、ポリブチレ
ンテレフタレート、芳香族ポリエステル、ナイロ
ン、芳香族ポリアミド、ポリフエニレンサルフア
イド、ポリスルフオン、ポリエーテルスルフオ
ン、ポリエーテルエーテルケトン等を用いること
ができ、熱硬化性を示すものとしては、例えば、
エポキシ樹脂、不飽和ポリエステル樹脂、フエノ
ール樹脂等が用いられる。特に、エポキシ樹脂
は、粘度が低く、繊維とのなじみがよいのでエポ
キシ樹脂の使用が好ましい。
なお、本明細書で言う繊維強化合成樹脂材料に
は、プリプレグ及び非プリプレグのいずれもが包
含される。
本発明の製品は、例えば繊維と合成樹脂からな
る繊維強化樹脂材料から構成された管状体の管壁
をスパイラル状に切断した後、得られたスパイラ
ル状帯状物の上下隣接面を、厚さ10μｍ〜１mmを
有し、そのままあるいは熱処理によつて溶融しな
い材料、例えば紙、ポリエステル、銅等のシート
状物を介在させて、竹の子状に重ねることによつ
て得ることができる。シート状物を介在させた後
は、熱処理後、そのシート状物を除去する。シー
ト状物を介在させることによつて、帯状物接触面
の接着を防止することができる。この場合、好ま
しくは該スパイラル状帯状物の上下切断部に、研
磨処理をするか、接着剤を塗工する等、破損防止
処理を施こす。熱処理は、合成樹脂のガラス転移
点温度以上、熱分解温度未満の温度、例えば、エ
ポキシ樹脂の場合では、100〜200℃、好ましくは
120〜150℃の温度で行うことができる。熱処理時
間は、通常、10〜60分、好ましくは20〜40分程度
である。繊維強化樹脂体における繊維配向角度
は、第２図に示すように製品の長軸方向Ａに対し
繊維配向方向をＢ，B′とし繊維配向角度をθと
したとき、20度以内の範囲角度を用いたものは長
尺物にしても曲がりを生じることが少いので好ま
しく、θを20度以内の範囲のものと、20度から70
度の範囲及び70度から90度の範囲の中から選ばれ
る角度の１種又は２種以上のものとを組合せて用
いるのがよく、とりわけ20度以内の範囲のものと
70〜90度の範囲のものとの組合せを用いるのが製
品の使用耐久性がよいので好ましい。
第３図に、管状体の管壁をスパイラル状帯状物
に切断する際の切断方向を示す。第３図におい
て、１０は繊維強化樹脂体からなる管状体であつ
て、１１はそのスパイラル状の切断線を示す。
本発明においては、樹脂の強化に用いる繊維
は、繊維束状、織物状、編組織物状等の形で用い
られる。また、管状体の製造は、従来公知の方法
に従つて製造することができる。例えば、織物状
繊維又は一方向揃え繊維に溶剤に溶かした合成樹
脂か、常温で液状を示す合成樹脂か、あるいは常
温で固体を示す合成樹脂を溶融したものを含浸さ
せたプリプレグを管状に巻成し、該樹脂が熱可塑
性を示すときは溶剤を乾燥除去した後圧力を加え
ながらそのガラス転移温度以上分解温度以下の温
度で加熱した後、冷却して固化させ、該樹脂が熱
硬化性を示すときは熱硬化させることによつて得
ることができるし、あるいは繊維を合成樹脂をマ
トリツクスとするフイラメントワインデイング法
により巻成し、固化または熱硬化させることによ
つて得ることができる。
〔効果〕
本発明の伸縮性保護カバーは、繊維強化樹脂
（FRP）製のものであるため、従来の鉄鋼製のも
のとは異なり、軽量でかつ良好なバネ復元性を有
し、しかも小さな圧縮力で圧縮させることができ
る。さらに、本発明の製品は、錆びることがな
く、長期間にわたつて安定に保存及び使用するこ
とが可能である上、自重も軽いことから、長尺物
にしても曲がりを生じることが少ない。また、本
発明の製造方法は大がかりな装置が不要であり、
その上寸法精度のよい伸縮性保護カバーを効率よ
く製造することができる。
〔実施例〕
実施例 １
細部外径40mm、太部外径41mm、長さ500mmの金
属製テーパー付マンドレルに炭素繊維織物プリプ
レグ（東邦レーヨン社製炭素繊維織物Ｗ−3101に
エポキシ樹脂を含浸して乾燥させたプレプレグ）
を、その繊維配向角度がマンドレルの長軸方向に
対し０度及び90度となるように３層捲回し、合成
樹脂製テープにて表面を固定して加熱硬化後、脱
芯、合成樹脂製テープを除去、表面を研磨して細
部外径41mm、太部外径42mm、長さ500mm、肉厚0.5
mmのパイプを得た。このパイプを板巾25mm、角度
45゜でスパイラル状に切断し、このスパイラル状
帯状物をオーバーラツプ巾５mmとなるように細部
より上下隣接面を順次オーバーラツプさせ、この
状態で150℃にて30分間熱処理を行い、細部内径
40mm、太部内径50mm、高さ240mmの伸縮性保護カ
バーを得た。この伸縮性保護カバーを構成する繊
維の配向角度は伸縮性保護カバーの長軸方向に対
し、８度及び82度であつた。
実施例 ２
実施例１と同じマンドレルの上に、実施例１と
同様の炭素繊維織物にABS樹脂（宇部サイコン
社製、サイコラツクGS）を30重量％含有するメ
チルエチルケトン溶液を含浸したプリプレグを、
実施例１と同様に巻成し、これを乾燥して溶剤を
除去した後、合成樹脂製テープを巻いて該プリプ
レグを固定し、110℃で30分間熱処理し、その後
それを室温に冷却、表面を研磨して実施例１と同
様の外形を有するパイプを得た。このパイプを実
施例１と同様にして、スパイラル状に切断し、上
下隣接面をオーバーラツプさせた。この状態で
120℃にて30分間熱処理を行い、実施例１と同様
の外形及び繊維配向を有する伸縮性保護カバーを
得た。
本発明による竹の子バネ状の伸縮性保護カバー
（炭素繊維強化合成樹脂製）の性状を、従来の鉄
鋼製のものと対比して次表に示す。
次表から明らかなように、本発明の伸縮性保護
カバーは従来の鉄鋼製のものとは異なり、軽量で
かつ良好なバネ復元性を示し、しかも小さな圧縮
力で圧縮させることができる。
[Technical Field] The present invention relates to a stretchable protective cover used to cover lead screws of various machines such as lathes and presses, and exposed shaft members of rams, spindles, cylinders, screws, and the like. [Prior Art] Conventionally, in order to protect the exposed shaft material as described above from foreign substances such as dust, or to prevent the human body from coming into direct contact with the shaft material, the area around the shaft material has been covered with an elastic protective cover. is known. As such a protective cover, a compression spring in which a band-shaped elastic body is wound into a conical shape, a so-called bamboo shoot spring, is generally used (Japanese Patent Laid-Open No. 59-94532, Japanese Patent Publication No. 50-39215, etc.). . However, conventionally used bamboo springs are made by winding a steel strip material with a high specific gravity into a bamboo shoot shape, so they are heavy and easy to rust, and they also have poor springiness and frictional resistance. It also has the disadvantage of requiring a large amount of force to compress because it is too long.Furthermore, when it is made into a long object, its specific gravity is large, so it will bend due to its own weight, and there is a limit to its length, and furthermore, it is difficult to manufacture it. It also has the disadvantage of being difficult. [Objective] An object of the present invention is to provide a stretchable protective cover that overcomes the above-mentioned drawbacks and a method for manufacturing the same. In order to overcome the drawbacks of the conventional bamboo springs made of steel, the inventors of the present invention have conducted various studies to manufacture bamboo springs made of synthetic resin materials. Even if a plastic resin is used, it is not possible to obtain a bamboo shoot spring that is satisfactory, and by using a fiber-reinforced resin material made of fibers and synthetic resin, it is possible to manufacture a bamboo shoot spring that overcomes the above-mentioned drawbacks. I found out. [Structure] According to the present invention, as a first invention, the upper and lower portions of a spiral strip formed by cutting the tube wall of a tubular body made of a fiber-reinforced synthetic resin material made of fibers and synthetic resin in a spiral shape Provided is a stretchable protective cover characterized in that adjacent surfaces overlap in a bamboo shoot shape, and in this state, heat treatment is applied to fix the bamboo shoot state. In addition, as a second invention, after cutting the tube wall of a tubular body made of a fiber-reinforced synthetic resin material consisting of fibers and synthetic resin into a spiral shape, the upper and lower adjacent surfaces of the obtained spiral strip are cut into bamboo shoots. Provided is a method for manufacturing a stretchable protective cover, which comprises stacking the covers in a shape and heat-treating them in this state to fix the bamboo shoot state. Next, the stretchable protective cover of the present invention will be explained with reference to the drawings. FIG. 1 is an explanatory diagram of the shape of the stretchable protective cover according to the present invention, and the whole shows the shape of a bamboo shoot spring. 1 shows a spiral band formed by cutting the wall of a tubular body into a spiral shape, and the upper and lower adjacent surfaces of the spiral band are overlapped like bamboo shoots and wound into a spiral shape. Composed of resin body. 2 indicates an overlapping portion of adjacent strip-shaped object surfaces. In this overlapping part, the overlap of the strips is such that when the bamboo shoot spring is fully extended,
10-50% of the width of the strip, preferably 15-30%
It is best to make the percentages overlap. Further, the fiber content in the fiber reinforced resin body is preferably 30 to 80% by volume, preferably 45 to 75% by volume. In addition, the density of this fiber-reinforced resin body is generally
It is best to set it at 1.3 to 2.0 g/cm 3 . When carbon fiber is used as the fiber, the density of the fiber reinforced resin body is 1.3 to 1.7 g/cm 3 , preferably 1.5 to 1.6 g/cm 3
It is best to specify the range. In the present invention, a fiber-reinforced resin material made of fibers and synthetic resin is used as the molding material. In this case, as the fibers, in addition to inorganic fibers such as carbon fibers, glass fibers, and alumina fibers, organic fibers such as aromatic polyester fibers and aramid fibers, and metal fibers are used alone or in combination. Among these, carbon fiber is preferred because it has high elasticity. The shape of the fibers can be arbitrary, such as fiber bundles or woven fabrics (cross).
It can be used in the form of a unidirectionally aligned fiber, a braided material, a nonwoven fabric, or a combination thereof. As synthetic resins, both thermoplastic and thermosetting resins can be used; examples of thermoplastic resins include polycarbonate and ABS.
Resin, polyethylene terephthalate, polybutylene terephthalate, aromatic polyester, nylon, aromatic polyamide, polyphenylene sulfide, polysulfon, polyether sulfon, polyether ether ketone, etc. can be used, and as a material exhibiting thermosetting properties. For example,
Epoxy resins, unsaturated polyester resins, phenolic resins, etc. are used. In particular, it is preferable to use epoxy resin because it has a low viscosity and is compatible with fibers. Note that the fiber-reinforced synthetic resin material referred to in this specification includes both prepreg and non-prepreg. In the product of the present invention, for example, after cutting the tube wall of a tubular body made of a fiber-reinforced resin material made of fibers and synthetic resin in a spiral shape, the upper and lower adjacent surfaces of the obtained spiral strip are cut into a thickness of 10 μm. ~1 mm, and can be obtained by layering them in a bamboo shoot shape either as is or with a sheet of material such as paper, polyester, copper, etc., which does not melt by heat treatment, interposed therebetween. After the sheet-like material is interposed, the sheet-like material is removed after heat treatment. By interposing the sheet-like material, adhesion of the contact surface of the strip-like material can be prevented. In this case, the upper and lower cut portions of the spiral strip are preferably subjected to damage prevention treatment such as polishing or coating with adhesive. The heat treatment is performed at a temperature higher than the glass transition point of the synthetic resin and lower than the thermal decomposition temperature, for example, in the case of epoxy resin, 100 to 200°C, preferably
It can be carried out at a temperature of 120-150°C. The heat treatment time is usually about 10 to 60 minutes, preferably about 20 to 40 minutes. The fiber orientation angle in the fiber-reinforced resin body is defined as the range angle within 20 degrees, where the fiber orientation directions are B and B' and the fiber orientation angle is θ with respect to the long axis direction A of the product, as shown in Figure 2. The material used is preferable because it is less likely to bend even when made into a long object, and the θ is within 20 degrees, and the θ is between 20 degrees and 70 degrees.
It is best to use one or more types of angles selected from the range of degrees and the range of 70 degrees to 90 degrees, especially those within the range of 20 degrees.
It is preferable to use a combination with a temperature range of 70 to 90 degrees because the durability of the product is good. FIG. 3 shows the cutting direction when cutting the wall of the tubular body into spiral strips. In FIG. 3, 10 is a tubular body made of a fiber-reinforced resin body, and 11 indicates its spiral cutting line. In the present invention, the fibers used for reinforcing the resin are used in the form of a fiber bundle, a woven fabric, a knitted material, or the like. Further, the tubular body can be manufactured according to a conventionally known method. For example, prepreg is made by impregnating woven fibers or unidirectional fibers with a synthetic resin dissolved in a solvent, a synthetic resin that is liquid at room temperature, or a synthetic resin that is solid at room temperature. However, when the resin exhibits thermoplasticity, after drying and removing the solvent, it is heated at a temperature above its glass transition temperature and below its decomposition temperature, and then cooled to solidify, so that the resin exhibits thermosetting properties. It can be obtained by heat curing, or by winding fibers using a filament winding method using a synthetic resin as a matrix, and solidifying or heat curing the fibers. [Effects] Since the elastic protective cover of the present invention is made of fiber reinforced resin (FRP), unlike conventional steel products, it is lightweight and has good spring resilience, and also has a small compression resistance. It can be compressed by force. Furthermore, the products of the present invention do not rust and can be stored and used stably for long periods of time, and are also light in weight, so they are less likely to bend even when made into long products. In addition, the manufacturing method of the present invention does not require large-scale equipment,
Moreover, it is possible to efficiently manufacture a stretchable protective cover with good dimensional accuracy. [Example] Example 1 Carbon fiber fabric prepreg (carbon fiber fabric W-3101 manufactured by Toho Rayon Co., Ltd. impregnated with epoxy resin dried prepreg)
is wound in three layers so that the fiber orientation angles are 0 degrees and 90 degrees with respect to the long axis direction of the mandrel, the surface is fixed with a synthetic resin tape, and after heating and curing, the core is removed and the synthetic resin tape is wound. Removed, polished the surface and finished the details with an outer diameter of 41 mm, a thick outer diameter of 42 mm, a length of 500 mm, and a wall thickness of 0.5 mm.
I got a mm pipe. This pipe has a board width of 25 mm and an angle
Cut the spiral strip at 45 degrees in a spiral shape, overlap the upper and lower adjoining surfaces sequentially from the detail so that the overlap width is 5 mm, and heat treat it at 150℃ for 30 minutes in this state to reduce the inner diameter of the detail.
A stretchable protective cover with a diameter of 40 mm, an inner diameter of the thick part of 50 mm, and a height of 240 mm was obtained. The orientation angles of the fibers constituting this stretchable protective cover were 8 degrees and 82 degrees with respect to the longitudinal direction of the stretchable protective cover. Example 2 On the same mandrel as in Example 1, a prepreg prepared by impregnating the same carbon fiber fabric as in Example 1 with a methyl ethyl ketone solution containing 30% by weight of ABS resin (Cycolac GS, manufactured by Ube Cycon Co., Ltd.) was placed.
The prepreg was wound in the same manner as in Example 1, dried to remove the solvent, wrapped with a synthetic resin tape to fix the prepreg, heat-treated at 110°C for 30 minutes, then cooled to room temperature, and the surface was polished to obtain a pipe having the same external shape as in Example 1. This pipe was cut into a spiral shape in the same manner as in Example 1, so that the upper and lower adjacent surfaces overlapped. in this state
Heat treatment was performed at 120° C. for 30 minutes to obtain a stretchable protective cover having the same external shape and fiber orientation as in Example 1. The properties of the bamboo shoot spring-shaped elastic protective cover (made of carbon fiber-reinforced synthetic resin) according to the present invention are shown in the following table in comparison with conventional ones made of steel. As is clear from the following table, the stretchable protective cover of the present invention, unlike conventional steel covers, is lightweight, exhibits good spring resilience, and can be compressed with a small compression force.
【表】
圧縮力
実施例 ３
実施例１において、スパイラル状帯状物を細部
より上下隣接面を順次オーバーラツプさせる際
に、厚さ0.5mmのポリアセタールシートを介在さ
せながら順次オーバーラツプを行なうとともに、
熱処理後にそのポリアセタールシートを除去した
以外は同様にして伸縮性保護カバーを得た。この
場合、ポリアセタールシートを用いたことによ
り、スパイラル状帯状物の接触面での接着を完全
防止することができた。
実施例 ４
実施例２において、スパイラル状帯状物を細部
より上下隣接面を順次オーバーラツプさせる際
に、厚さ0.5mmのナイロンシートを介在させなが
ら順次オーバーラツプを行うとともに、熱処理後
に、そのナイロンシートを除去した以外は同様に
して伸縮性保護カバーを得た。この場合、ナイロ
ンシートを用いたことにより、スパイラル状帯状
物の接触面での接着を完全防止することができ
た。[Table] Compressive Force Example 3 In Example 1, when sequentially overlapping the upper and lower adjacent surfaces of the spiral strip from the details, the overlap was performed sequentially while interposing a polyacetal sheet with a thickness of 0.5 mm, and
A stretchable protective cover was obtained in the same manner except that the polyacetal sheet was removed after heat treatment. In this case, by using the polyacetal sheet, it was possible to completely prevent adhesion on the contact surface of the spiral strip. Example 4 In Example 2, when sequentially overlapping the upper and lower adjacent surfaces of the spiral strip from the details, the overlap was performed sequentially with a 0.5 mm thick nylon sheet interposed, and the nylon sheet was removed after heat treatment. A stretchable protective cover was obtained in the same manner except for the following steps. In this case, by using the nylon sheet, it was possible to completely prevent adhesion on the contact surface of the spiral strip.
第１図は本発明の伸縮性保護カバーの形状説明
図を示す。第２図は本発明の伸縮性保護カバーの
長軸方向に対する繊維の配向方向を示す。第３図
は繊維強化樹脂体からなる管状体の管壁をスパイ
ラル状帯状物に切断する際の切断方向を示す。
１……帯状物、２……重なり部、１０……管状
体、１１……切断線、Ａ……伸縮性保護カバーの
長軸方向、Ｂ，B′……繊維の配向方向、θ……
繊維の配向角度。
FIG. 1 shows an explanatory diagram of the shape of the stretchable protective cover of the present invention. FIG. 2 shows the fiber orientation direction with respect to the longitudinal direction of the stretchable protective cover of the present invention. FIG. 3 shows the cutting direction when cutting the tube wall of the tubular body made of fiber-reinforced resin into spiral strips. DESCRIPTION OF SYMBOLS 1... Band-shaped object, 2... Overlapping part, 10... Tubular body, 11... Cutting line, A... Long axis direction of elastic protective cover, B, B'... Fiber orientation direction, θ...
Fiber orientation angle.
Claims (1)
材料から構成された管状体の管壁をスパイラル状
に切断してなるスパイラル状帯状物の上下隣接面
が竹の子状に重つており、この状態において熱処
理が施されて該竹の子状態が固定化されているこ
とを特徴とする伸縮性保護カバー。 ２ 繊維の配向角度が伸縮性保護カバーの長軸方
向に対し、20度以内の範囲のものと、20度から70
度の範囲及び70度から90度の範囲のものとから選
ばれる１種又は２種以上の組合せからなる特許請
求の範囲第１項の伸縮性保護カバー。 ３ 繊維と合成樹脂とからなる繊維強化合成樹脂
材料から構成された管状体の管壁をスパイラル状
に切断した後、得られたスパイラル状帯状物の上
下隣接面を竹の子状に重ね、この状態において熱
処理して、該竹の子状態を固定化させることを特
徴とする伸縮性保護カバーの製造方法。 ４ スパイラル状帯状物の上下隣接面を、厚さ
10μｍ〜１mmのシート状物を介在させて竹の子状
に重ね、この状態において熱処理して、該竹の子
状態を固定させた後、該シート状物を除去するこ
とを特徴とする特許請求の範囲第３項の伸縮性保
護カバーの製造方法。 ５ 管状の管壁をスパイラル状に切断した後、得
られたスパイラル状帯状物の上下切断部に破損防
止処理を施した特許請求の範囲第３項の伸縮性保
護カバーの製造方法。 ６ スパイラル状帯状物の上下切断部を研磨する
ことにより破損防止処理を施した特許請求の範囲
第５項の伸縮性保護カバーの製造方法。 ７ スパイラル状帯状物の上下切断部に接着剤を
塗布することにより破損防止処理を施した特許請
求の範囲第５項の伸縮性保護カバーの製造方法。[Scope of Claims] 1. A spiral strip formed by cutting the tube wall of a tubular body made of fiber-reinforced synthetic resin material consisting of fibers and synthetic resin in a spiral shape, with the upper and lower adjacent surfaces overlapped in a bamboo shoot shape. A stretchable protective cover characterized in that the bamboo shoot state is fixed by heat treatment in this state. 2 The orientation angle of the fibers is within 20 degrees with respect to the long axis direction of the elastic protective cover, and the
The stretchable protective cover according to claim 1, comprising one or a combination of two or more selected from the range of 70 degrees and 70 degrees to 90 degrees. 3. After cutting the tube wall of a tubular body made of a fiber-reinforced synthetic resin material consisting of fibers and synthetic resin into a spiral shape, the upper and lower adjacent surfaces of the obtained spiral strip are overlapped in a bamboo shoot shape, and in this state, A method for producing a stretchable protective cover, which comprises heat-treating to fix the bamboo shoot state. 4 The thickness of the upper and lower adjacent surfaces of the spiral strip
Claim 3, characterized in that the sheet-like materials of 10 μm to 1 mm are interposed and stacked in the shape of bamboo shoots, heat treated in this state to fix the bamboo-like state, and then the sheet-like materials are removed. Method of manufacturing a stretchable protective cover. 5. The method for manufacturing a stretchable protective cover according to claim 3, wherein the tubular wall is cut into a spiral shape, and then the upper and lower cut portions of the obtained spiral strip are subjected to damage prevention treatment. 6. The method of manufacturing a stretchable protective cover according to claim 5, wherein the upper and lower cut portions of the spiral strip are subjected to damage prevention treatment by polishing. 7. The method for manufacturing a stretchable protective cover according to claim 5, wherein damage prevention treatment is performed by applying an adhesive to the upper and lower cut portions of the spiral strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-217039A JPH011525A (en) | 1987-03-20 | 1987-08-31 | Stretchable protective cover and manufacturing method thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-66297 | 1987-03-20 | ||
| JP6629787 | 1987-03-20 | ||
| JP62-217039A JPH011525A (en) | 1987-03-20 | 1987-08-31 | Stretchable protective cover and manufacturing method thereof |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPS641525A JPS641525A (en) | 1989-01-05 |
| JPH011525A JPH011525A (en) | 1989-01-05 |
| JPH0356902B2 true JPH0356902B2 (en) | 1991-08-29 |
Family
ID=
Also Published As
| Publication number | Publication date |
|---|---|
| JPS641525A (en) | 1989-01-05 |
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