JPH05321965A - Bent plate spring - Google Patents
Bent plate springInfo
- Publication number
- JPH05321965A JPH05321965A JP13087392A JP13087392A JPH05321965A JP H05321965 A JPH05321965 A JP H05321965A JP 13087392 A JP13087392 A JP 13087392A JP 13087392 A JP13087392 A JP 13087392A JP H05321965 A JPH05321965 A JP H05321965A
- Authority
- JP
- Japan
- Prior art keywords
- leaf spring
- plate spring
- bent plate
- load
- spring
- 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
Landscapes
- Springs (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、紙、フィルム等のロー
ル捲取用紙管を固定し、張力をかけて捲き上げるために
用いられるエアシャフト等に取り付け、狭い空間で大荷
重を支えるのに適した曲り板バネに関し、特にその板バ
ネ材として炭素繊維強化複合材料を用いることにより耐
久性と軽量化を極限まで追求した曲り板バネに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to support a large load in a narrow space by fixing a roll-up paper tube of paper, film or the like, and attaching it to an air shaft or the like used for winding up by applying tension. The present invention relates to a suitable bent leaf spring, and more particularly, to a bent leaf spring in which carbon fiber reinforced composite material is used as the leaf spring material to maximize durability and weight reduction.
【０００２】[0002]
【従来の技術】紙、フィルム巻取り用エアシャフトは、
関連技術の向上に伴い、捲取量の拡大と大型化が進めら
れ、逆にエアシャフトを支えるバネについては狭い空間
で過大な力を発生させて固定する必要が生じて来てい
る。こうした状況下で、従来の板バネはエアシャフト中
の細い溝に入るハット状の断面形状を有する金属板バネ
を使用してきたが、荷重条件の増大と、使用回数の増
大、軽量化等の要求を満足するにはバネの耐久性が問題
となってきている。2. Description of the Related Art Air shafts for winding paper and film are
With the improvement of related technology, the amount of winding is increased and the size is increased, and conversely, it has become necessary to generate an excessive force in a narrow space to fix the spring that supports the air shaft. Under such circumstances, the conventional leaf spring has used a metal leaf spring having a hat-shaped cross-sectional shape that fits into a narrow groove in the air shaft. However, increasing load conditions, increasing the number of times of use, and reducing weight have been demanded. To satisfy the requirement, the durability of the spring is becoming a problem.
【０００３】[0003]
【発明が解決しようとする課題】従来のハット状の断面
形状を有する金属板バネでは、そのコーナー部に応力集
中が起こり、高荷重条件では数週間乃至数ケ月で破壊す
るに至り、そのたびに面倒な交換を必要としている。In the conventional metal leaf spring having a hat-shaped cross-sectional shape, stress concentration occurs at the corners of the leaf spring, which causes breakage in a few weeks to a few months under a high load condition. Needs troublesome replacement.
【０００４】本発明はかかる交換作業の煩雑さを回避す
るためになされたものであり、その目的は同一空間に収
まりながら耐荷重性、耐久性が向上する曲り板バネを提
供することにある。The present invention has been made in order to avoid the complexity of such replacement work, and an object of the present invention is to provide a bent leaf spring which is improved in load resistance and durability while being housed in the same space.
【０００５】[0005]
【課題を解決するための手段】従来の板バネは、直線形
状の金属板バネ材を局部的に変形させ、そのコーナー部
にＲをもたせたハット状の断面形状としたものが使用さ
れているが、その中央をボルト留めして上下から面圧を
かけると、コーナー部に局部的な応力集中が発生し、上
下面間隔が極小となる以前に破損してしまう。コーナー
部におけるＲを大きくとると応力が分散する傾向になる
が、この場合には上下面間隔が極小となったときに波打
つ形状となり、応力は別の部分に集中して、結局破損す
る。As a conventional leaf spring, a linear metal leaf spring material is locally deformed to have a hat-shaped cross-sectional shape with R at its corner. However, if the center is bolted and surface pressure is applied from above and below, local stress concentration occurs at the corners, and the corners are damaged before the distance between the upper and lower surfaces becomes extremely small. When R at the corner is large, the stress tends to be dispersed, but in this case, the shape becomes wavy when the space between the upper and lower surfaces becomes a minimum, and the stress concentrates on another portion and eventually breaks.
【０００６】本発明では、曲り板バネの中央をボルト留
めし、上下面圧がかけられてバネ空間が極少になった場
合でも、破損することなく大荷重に耐える上に、耐久性
も向上させた本発明独自の形状をもつ板バネを提供す
る。According to the present invention, the center of the bent leaf spring is bolted, and even if the upper and lower surface pressure is applied and the spring space becomes extremely small, it can withstand a large load without being damaged and the durability is improved. Also provided is a leaf spring having a shape unique to the present invention.
【０００７】即ち、本発明の要旨は、狭い空間で荷重を
支える平面固定部と傾斜部とを有する曲り板バネにおい
て、その傾斜部の傾斜面長さをＬ、同板バネ長さ方向の
位置をｘ、該ｘ位置における高さをｙとするとき、ｙ＝
１−（３ｘ／２Ｌ）＋（ｘ3／２Ｌ3 ）の式を満足し、
且つ均一断面係数を有することにあり、その材質として
は鉄、アルミ等の金属の他、ＧＦＲＰ、ＣＦＲＰ等の複
合材料を使用し得るが、特に好適な材質として炭素繊維
強化複合材料を使用することが推奨される。That is, the gist of the present invention is, in a curved leaf spring having a flat fixing portion for supporting a load in a narrow space and a slant portion, the slant surface length of the slant portion is L, and the position in the length direction of the flat spring. Is x and the height at the x position is y, y =
Satisfies the equation 1- (3x / 2L) + ( x 3 / 2L 3),
In addition, since it has a uniform cross-section coefficient, it is possible to use metals such as iron and aluminum, as well as composite materials such as GFRP and CFRP, but use carbon fiber reinforced composite materials as particularly suitable materials. Is recommended.
【０００８】[0008]
【作用】本発明の作用を具体的に説明すると、紙管固定
用エアシャフトにおいて、エア圧によりラグを押し上
げ、圧力を伝達する曲り板バネは、従来ハット状の断面
形状をもつ金属板バネが使用されているが、荷重条件が
厳しい糸の捲取りに適用する場合に同板バネが応力集中
により数週間乃至１ケ月で破損するケースにおいて、本
発明の形状を採用することにより６ケ月乃至２年、特に
ＣＦＲＰを使用することにより、数年乃至数１０年の耐
久性をもたせることができることが判明した。The operation of the present invention will be described in detail. In the air tube for fixing the paper tube, the bent leaf spring that pushes up the lug by the air pressure and transmits the pressure is a metal leaf spring having a hat-shaped cross section. In the case where the leaf spring is used, but is applied to the winding of a thread under severe load conditions, the leaf spring is damaged in several weeks to one month due to stress concentration. It has been found that by using CFRP for a year, durability of several years to several tens of years can be provided.
【０００９】本発明に係る上記形状をもつ曲り板バネ
は、上下平面からの圧縮荷重に対してほぼ均等に変形
し、圧縮空間が極少になっても局部的な内部応力の集中
が発生せず破損することがない。The bent leaf spring having the above-described shape according to the present invention is deformed substantially evenly with respect to the compressive load from the upper and lower planes, and even if the compressed space becomes extremely small, local concentration of internal stress does not occur. It will not be damaged.
【００１０】[0010]
【実施例】以下、本発明の実施例を具体的に説明する。EXAMPLES Examples of the present invention will be specifically described below.
【００１１】（実施例１）低捲取りロール用エアシャフ
トの板バネに巾２０mm、厚み５mm、平面部長さ５０mm、
傾斜面長さ１５０mmの本発明の上記形状をもつＣＦＲＰ
製の板バネを使用し、板バネ部に５００ｋｇの荷重がか
かる条件のエア圧をかけたところ、バネは壊れることな
く紙管に固定し、耐久性よく利用することができた。Example 1 A leaf spring of an air shaft for a low take-up roll has a width of 20 mm, a thickness of 5 mm, and a plane portion length of 50 mm.
CFRP having the above-mentioned shape of the present invention having an inclined surface length of 150 mm
When a leaf spring made of was used and air pressure was applied to the leaf spring portion under a condition of applying a load of 500 kg, the spring was fixed to the paper tube without breaking and could be used with good durability.
【００１２】（比較例）実施例１において、巾２０mm、
厚み５mm、平面部長さ５０mm、傾斜面長さ１５０mmのハ
ット状（Ｒ＝５０mm）断面を有する従来形状の金属製板
バネを用いて同格の荷重をかけたところ、板バネのＲ部
で破損し、使用に供することができなかった。(Comparative Example) In Example 1, the width is 20 mm,
A metal leaf spring of the conventional shape having a hat-shaped (R = 50 mm) cross section with a thickness of 5 mm, a flat surface length of 50 mm, and an inclined surface length of 150 mm was used to apply the same load, but it was damaged at the R portion of the leaf spring. , Could not be used.
【００１３】[0013]
【発明の効果】以上の説明から明らかなごとく、本発明
に係る板バネは従来の板バネに比して耐久性が増大し、
頻発する板バネの煩雑な交換作業の手間がかからず、人
的面及び製品コスト低減につながる有用な発明である。As is apparent from the above description, the leaf spring according to the present invention has increased durability as compared with the conventional leaf spring,
This is a useful invention that does not require the troublesome replacement work of the leaf springs that frequently occurs and leads to a reduction in personnel and product costs.
【図１】本発明の曲り板バネ形状を示す説明断面図であ
る。FIG. 1 is an explanatory sectional view showing a bent leaf spring shape of the present invention.
【図２】従来の曲り板バネ形状を示す説明断面図であ
る。FIG. 2 is an explanatory cross-sectional view showing a conventional bent leaf spring shape.
Claims (2)
斜部とを有する曲り板バネにおいて、その傾斜部の傾斜
面長さをＬ、同板バネ長さ方向の位置をｘ、該ｘ位置に
おける高さをｙとするとき、ｙ＝１−（３ｘ／２Ｌ）＋
（ｘ3 ／２Ｌ3 ）の式を満足し、且つ均一断面係数を有
することを特徴とする曲がり板バネ。1. A curved leaf spring having a flat fixing portion for supporting a load in a narrow space and an inclined portion, wherein the inclined surface length of the inclined portion is L, the position in the leaf spring length direction is x, and the x position. Let y be the height at y = 1- (3x / 2L) +
(X 3 / 2L 3) formula satisfy the, and undulated plate spring and having a uniform cross-section factor.
とを特徴とする請求項１記載の曲り板バネ。2. The bent leaf spring according to claim 1, wherein the spring material is carbon fiber reinforced FRP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13087392A JPH05321965A (en) | 1992-05-22 | 1992-05-22 | Bent plate spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13087392A JPH05321965A (en) | 1992-05-22 | 1992-05-22 | Bent plate spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05321965A true JPH05321965A (en) | 1993-12-07 |
Family
ID=15044695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13087392A Pending JPH05321965A (en) | 1992-05-22 | 1992-05-22 | Bent plate spring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05321965A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810884A (en) * | 2022-06-27 | 2022-07-29 | 常州三众弹性技术有限公司 | Linear wave spring |
-
1992
- 1992-05-22 JP JP13087392A patent/JPH05321965A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810884A (en) * | 2022-06-27 | 2022-07-29 | 常州三众弹性技术有限公司 | Linear wave spring |
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