JP2507847Y2 - V belt for transmission - Google Patents
V belt for transmissionInfo
- Publication number
- JP2507847Y2 JP2507847Y2 JP3690890U JP3690890U JP2507847Y2 JP 2507847 Y2 JP2507847 Y2 JP 2507847Y2 JP 3690890 U JP3690890 U JP 3690890U JP 3690890 U JP3690890 U JP 3690890U JP 2507847 Y2 JP2507847 Y2 JP 2507847Y2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- rubber layer
- mixed
- compressed
- width direction
- 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
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、農業機械，一般産業機械等に使用される伝
動用Ｖベルトに係り、特に、屈曲応力に対する疲労強度
の向上対策に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a transmission V-belt used in agricultural machinery, general industrial machinery and the like, and more particularly to measures for improving fatigue strength against bending stress.
（従来の技術） 従来より、例えば実公昭62−34043号公報に開示され
る如く、第７図に示すように、伝動用Ｖベルトａの構成
として、抗張体ｂを埋設した接着ゴム層ｃの上下に、そ
れぞれ伸長ゴム層ｄと圧縮ゴム層ｅとを設け、該圧縮ゴ
ム層ｅの上部ｆと伸長ゴム層ｄとには、それぞれベルト
幅方向に配向する短繊維群を混入するとともに、全ゴム
層の外周をゴム付帆布ｈで被覆することにより、Ｖベル
トに高い負荷が作用したときに抗張体の周囲に応力が集
中して早期に破損するのを防止しようとするものは公知
の技術である。(Prior Art) Conventionally, as disclosed in, for example, Japanese Utility Model Publication No. 62-34043, as shown in FIG. 7, as a structure of a transmission V-belt a, an adhesive rubber layer c in which a tensile body b is embedded is provided. An expanded rubber layer d and a compressed rubber layer e are provided above and below, respectively, and short fiber groups oriented in the belt width direction are mixed in the upper part f of the compressed rubber layer e and the expanded rubber layer d, respectively. It is known that the outer circumference of all rubber layers is covered with a canvas h with rubber so as to prevent stress from being concentrated around the tensile body and prematurely breaking when a high load acts on the V-belt. Technology.
（考案が解決しようとする課題） しかしながら、上記従来のものでは、接着ゴム層ｃの
下側で圧縮応力を受ける圧縮ゴム層ｅにおいて、その上
部ｆにはベルト幅方向に配向する短繊維群が混入されて
いるものの、圧縮ゴム層ｅの下部ｇはゴムの単体で構成
されているために、下記のような問題があった。(Problems to be Solved by the Invention) However, in the above-mentioned conventional one, in the compressed rubber layer e which receives a compressive stress on the lower side of the adhesive rubber layer c, a short fiber group oriented in the belt width direction is provided on the upper part f thereof. Although mixed, the lower part g of the compressed rubber layer e is composed of a single rubber, so that there are the following problems.
すなわち、最近の機械類の小形化に伴ない、Ｖベルト
の駆動系、つまりプーリやＶベルトそのものが小径化し
てきているが、その場合、Ｖベルトには大きな屈曲力が
作用する。特にベルト底面に近い圧縮ゴム層の下部ｇ
は、駆動中、Ｖベルトがプーリに係合するときに屈曲に
よる強い圧縮応力を受けるので、プーリとの係合が外れ
たときに受ける引張応力との間で振幅の大きい繰返し応
力を受けることになる。しかるに、上記圧縮ゴム層ｅの
下部ｇはゴム単体からなるために、上記のような振幅の
大きい繰返し応力による疲労亀裂を生じて、早期に破損
に至る虞れがあった。That is, with the recent miniaturization of machinery, the drive system of the V-belt, that is, the pulley and the V-belt itself has been reduced in diameter. In that case, a large bending force acts on the V-belt. Especially under the compressed rubber layer near the bottom of the belt g
Receives a strong compressive stress due to bending when the V-belt is engaged with the pulley during driving, and therefore receives a repetitive stress having a large amplitude between the V-belt and the tensile stress received when the V-belt is disengaged from the pulley. Become. However, since the lower part g of the compressed rubber layer e is made of a simple substance of rubber, there is a possibility that fatigue cracks may occur due to repetitive stress with a large amplitude as described above, leading to early damage.
そこで、例えば実開昭59−110457号公報に開示される
考案を適用して、第８図に示すように、圧縮ゴム層ｅと
ゴム付帆布ｈとの間に織布ｉを１枚〜複数枚積層して設
けることにより、屈曲による疲労に対する抵抗力を高め
ることや、実開昭61−7642号公報及び実開昭62−104044
号公報に開示されるごとく、伸長ゴム層や圧縮ゴム層中
にスダレ織布を積層して配設することにより、ゴム層自
体の補強強度を向上させることも可能である。Therefore, for example, by applying the device disclosed in Japanese Utility Model Laid-Open No. 59-110457, as shown in FIG. 8, one to a plurality of woven fabrics i are provided between the compressed rubber layer e and the rubber-coated canvas h. By providing a stack of sheets, the resistance to fatigue due to bending can be increased, and JP-A-61-7642 and JP-A-62-104044 can be used.
As disclosed in the publication, it is possible to improve the reinforcing strength of the rubber layer itself by laminating and arranging the woven fabric in the stretched rubber layer or the compressed rubber layer.
しかしながら、このような織布による強化だけでは、
その織布に接触する圧縮ゴム層自体が強化されるわけで
はないので、圧縮ゴム層の下部から疲労亀裂が生じる
と、やはりＶベルトの早期破損をきたす虞れがある。However, with just such woven reinforcement,
Since the compression rubber layer itself that contacts the woven fabric is not reinforced, if a fatigue crack occurs from the lower portion of the compression rubber layer, the V-belt may also be damaged early.
本考案は斯かる点に鑑みてなされたものであり、その
目的は、特に強い屈曲力を受ける圧縮ゴム層の下部の耐
屈曲力を強化することにより、伝動用Ｖベルトの屈曲疲
労に対する抵抗性の向上を図ることにある。The present invention has been made in view of the above problems, and an object thereof is to enhance resistance to bending fatigue of a transmission V-belt by strengthening the bending resistance of a lower portion of a compression rubber layer that receives a particularly strong bending force. Is to improve.
（課題を解決するための手段） 上記目的を達成するため本考案の解決手段は、伝動用
Ｖベルトの構造として、抗張体を埋設した接着ゴム層の
上面に伸長ゴム層を、下面に圧縮ゴム層をそれぞれ設
け、上記伸長ゴム層と圧縮ゴム層の上部とにそれぞれ短
繊維をベルト幅方向に配向せしめて混入する。(Means for Solving the Problem) In order to achieve the above-mentioned object, the solution means of the present invention is, as a structure of a transmission V-belt, a stretched rubber layer is compressed on the upper surface of an adhesive rubber layer in which a tensile body is embedded and compressed on the lower surface. Rubber layers are provided, and short fibers are oriented and mixed in the belt width direction in the stretched rubber layer and the compressed rubber layer.
そして、上記圧縮ゴム層の上記ベルト幅方向繊維混入
部分の下側となる下部に、長さ0.5〜6.0mmの短繊維を混
入量0.5〜3.0重量部でもってベルト長手方向に配向せし
めて混入し、かつ該ベルト長手方向繊維混入部分をベル
ト高さの3.0〜40％の厚さに設定する。Then, the lower part of the compressed rubber layer, which is the lower side of the belt width direction fiber mixing portion, is mixed by orienting short fibers having a length of 0.5 to 6.0 mm in the belt longitudinal direction with a mixing amount of 0.5 to 3.0 parts by weight. The thickness of the fiber-containing portion in the longitudinal direction of the belt is set to 3.0 to 40% of the belt height.
さらに、上記各ゴム層からなる全体をゴム付帆布によ
り被覆する構成としたものである。Further, the whole rubber layer is covered with a canvas with rubber.
第２の解決手段は、上記第１の解決手段における圧縮
ゴム層のベルト長手方向繊維混入部分のゴム硬度をJIS
−Ａの硬度表示で60〜80°としたものである。A second means for solving the problem is that the rubber hardness of the portion of the compressed rubber layer mixed with the fibers in the belt longitudinal direction according to the first means is JIS JIS.
The hardness of -A is 60 to 80 °.
第３の解決手段は、上記第１又は第２の解決手段にお
ける圧縮ゴム層の下面とゴム付帆布との間に１枚〜複数
枚の織布を介設する構成としたものである。A third solving means is configured such that one to a plurality of woven fabrics are provided between the lower surface of the compressed rubber layer and the rubber-attached canvas in the first or second solving means.
第４の解決手段は、上記第1,第２又は第３の解決手段
における圧縮ゴム層のベルト幅方向繊維混入部分及び伸
長ゴム層に、１枚〜複数枚のスダレ織布をベルト幅方向
に配せしめて埋設したものである。A fourth solving means is one to a plurality of woven fabrics in the belt width direction in the belt width direction fiber mixed portion of the compressed rubber layer and the extended rubber layer in the above first, second or third solving means. It is placed and buried.
（作用） 以上の構成により、請求項（１）の考案では、接着ゴ
ム層の上下にそれぞれ伸長ゴム層と圧縮ゴム層とが設け
られ、圧縮ゴム層の上部と伸長ゴム層とにそれぞれベル
ト幅方向に配向する短繊維が混入されているので、接着
ゴム層に作用する集中応力が緩和される。(Operation) With the above configuration, in the device of claim (1), the extension rubber layer and the compression rubber layer are provided above and below the adhesive rubber layer, and the belt width is provided above the compression rubber layer and the extension rubber layer. Since the short fibers oriented in the direction are mixed, the concentrated stress acting on the adhesive rubber layer is relaxed.
そして、圧縮ゴム層の下部にベルト長手方向に配向す
る短繊維が混入されているので、伝動用ベルトのプーリ
との係合時におけるベルト長手方向の屈曲に対する補強
作用により、疲労亀裂の発生を抑制することができると
ともに、疲労亀裂が発生した場合にも、接着ゴム層に向
かって進展する亀裂の先端が短繊維に突き当たってそれ
以上の進展を阻止される確率が高くなり、疲労亀裂の速
やかな伝播が妨害される。よって、屈曲疲労に対する抵
抗性が向上することになる。Since the short fibers oriented in the belt longitudinal direction are mixed in the lower part of the compressed rubber layer, the occurrence of fatigue cracks is suppressed by the reinforcing action against the bending of the transmission belt in the belt longitudinal direction at the time of engagement with the pulley of the transmission belt. Along with the possibility of fatigue cracking, the probability that the tip of the crack propagating toward the adhesive rubber layer will hit short fibers and prevent further progressing will increase, and the fatigue cracking Propagation is interrupted. Therefore, the resistance to bending fatigue is improved.
請求項（２）の考案では、圧縮ゴム層の下部を形成す
るゴムの硬度がJIS表示で60〜80°に設定されており、
特に伝動用ベルトの屈曲に対する柔軟性と抵抗性とのバ
ランスが良好に維持されることになる。In the invention of claim (2), the hardness of the rubber forming the lower part of the compressed rubber layer is set to 60 to 80 ° in JIS,
In particular, a good balance between flexibility and resistance to bending of the transmission belt is maintained.
請求項（３）の考案では、圧縮ゴム層の下面とゴム付
帆布との間に介設された織布の補強効果により、ベルト
底面における疲労亀裂の発生が抑制されることになる。According to the invention of claim (3), fatigue cracks are suppressed from being generated on the bottom surface of the belt due to the reinforcing effect of the woven cloth interposed between the lower surface of the compressed rubber layer and the canvas with rubber.
請求項（４）の考案では、スダレ織布の補強効果によ
り、屈曲時における引張強度が増大するので、その分ベ
ルト厚みが低減され、ベルト長さ方向の柔軟性が向上
し、駆動系の小形化に対応することが可能になる。According to the invention of claim (4), since the tensile strength at the time of bending is increased by the reinforcing effect of the woven fabric, the belt thickness is reduced accordingly, the flexibility in the belt length direction is improved, and the compact drive system is provided. It becomes possible to cope with the change.
（第１実施例） 以下、請求項（１）の考案に係る第１実施例につい
て、第１図及び第２図に基づき説明する。(First Embodiment) A first embodiment according to the invention of claim (1) will be described below with reference to FIGS. 1 and 2.
第１図は第１実施例に係る伝動用Ｖベルト１の断面構
造を示し、２は抗張体３が接着ゴム４に埋設されてなる
接着ゴム層、５は該接着ゴム層２の上側に設けられた伸
長ゴム層、６は上記接着ゴム層２の下側に設けられた圧
縮ゴム層である。上記伸長ゴム層５と、上記圧縮ゴム層
６の上部6Aとには、ベルト幅方向に配向する短繊維F1，
F1，…及びF2，F2，…がそれぞれ混入されている。FIG. 1 shows a cross-sectional structure of a transmission V-belt 1 according to the first embodiment, 2 is an adhesive rubber layer in which a tensile body 3 is embedded in an adhesive rubber 4, and 5 is an upper side of the adhesive rubber layer 2. An extended rubber layer 6 is provided, and a compressed rubber layer 6 is provided below the adhesive rubber layer 2. The stretched rubber layer 5 and the upper portion 6A of the compressed rubber layer 6 have short fibers F 1 oriented in the belt width direction,
F 1 , ... and F 2 , F 2 , ... are mixed respectively.
ここで、第２図に示すように、上記伸長ゴム部６の上
部6Aの下側の下部6Bには、ベルト長手方向に配向するセ
ルロースの短繊維F3，F3，…が混入されており、該短繊
維F3，F3，…は、繊維長さが0.5〜6.0mmで繊維量が0.5
〜3.0PHR（ゴム100部に対する繊維の重量部）の範囲に
なるようになされている。Here, as shown in FIG. 2, short fibers F 3 , F 3 , ... Of cellulose oriented in the belt longitudinal direction are mixed in the lower portion 6B below the upper portion 6A of the stretched rubber portion 6. , The short fibers F 3 , F 3 , ... Have a fiber length of 0.5 to 6.0 mm and a fiber amount of 0.5.
It is designed to be in the range of ~ 3.0 PHR (part by weight of fiber to 100 parts of rubber).
そして、上記各ゴム層2,5,6の全体は、外周をゴム付
帆布７で被覆されている。The entire outer circumference of each of the rubber layers 2, 5, and 6 is covered with a canvas 7 with rubber.
次に、上記第１実施例に係る実験結果について説明す
る。上記の構造を有し、ベルト幅が16.7mm、ベルト高さ
が9.0mm、Ｖ角度が40°、伸長ゴム層５の厚みがベルト
高さの16％、圧縮ゴム層６の上部6Aの厚みがベルト高さ
の16％、圧縮ゴム層６の下部6Bの厚みがベルト高さの33
％の断面を有するＶベルトについて、試験サンプルを作
成した。なお、Ｖベルトのピッチ径は44inchのものを使
用している。Next, the experimental result according to the first embodiment will be described. With the above structure, the belt width is 16.7 mm, the belt height is 9.0 mm, the V angle is 40 °, the thickness of the stretched rubber layer 5 is 16% of the belt height, and the thickness of the upper portion 6A of the compressed rubber layer 6 is 6%. 16% of the belt height, the thickness of the lower part 6B of the compression rubber layer 6 is 33% of the belt height.
Test samples were made for V-belts with% cross section. The V-belt has a pitch diameter of 44 inches.
また、第３図はベルト寿命試験に使用した実験装置の
概略を示し、21は駆動側プーリ（径87mm、回転数1800RP
M）、22は従動側プーリ（径194mm、負荷3.5PS）、23は
Ｖベルト１を内側に付勢する外側アイドラ（径45mm、加
重11.7Kgf）である。なお、駆動側プーリ21と外側アイ
ドラ23との軸間距離は130mmである。なお、実使用条件
に近付けるため、ベルトの周囲温度は70℃に保持されて
いる。Further, Fig. 3 shows an outline of the experimental device used for the belt life test, and 21 is a drive side pulley (diameter 87 mm, rotation speed 1800 RP).
M), 22 is a driven pulley (diameter 194 mm, load 3.5 PS), and 23 is an outer idler (diameter 45 mm, weight 11.7 kgf) that biases the V-belt 1 inward. The axial distance between the drive pulley 21 and the outer idler 23 is 130 mm. The ambient temperature of the belt is maintained at 70 ° C in order to approach actual use conditions.
そして、上記形状のＶベルト１について、圧縮ゴム層
６の下部6Bの短繊維F3，F3，…について、長さ2mmのセ
ルロース短繊維の混入量のみを、0PHR，0.5PHR，1.
0PHR，3.0PHR，5.0PHRの間で変化させ、伸長ゴム層５の
短繊維F1，F1，…及び圧縮ゴム層６の上部6Aの短繊維
F2，F2，…の形状及び混入量はすべて同じに調整したサ
ンプル５種類についてベルト寿命試験を行った。下記第
１表はその結果を示す。Then, in the V-belt 1 having the above-mentioned shape, the short fibers F 3 , F 3 , ... Of the lower portion 6B of the compressed rubber layer 6 are mixed with only the mixed amount of the cellulose short fibers of 2 mm in length, 0 PHR , 0.5 PHR , 1.
By changing between 0 PHR , 3.0 PHR , and 5.0 PHR , the short fibers F 1 , F 1 , ... Of the expanded rubber layer 5 and the upper 6A of the compressed rubber layer 6
A belt life test was carried out on five types of samples in which the shapes of F 2 , F 2 , ... Table 1 below shows the results.
上記第１表に示すように、短繊維F3，F3，…の混入量
が0.5PHR以下や、3.0PHR以上では、ベルト寿命が低下す
る。すなわち、短繊維F3，F3，…の混入量が3.0PHRを越
えると、Ｖベルト１自体の曲げ剛性が高くなって柔軟性
が損なわれるために、かえって高い応力がゴムの部分に
作用し、疲労亀裂の発生抑制効果が消滅してしまうから
である。また、混入量が0.5PHR未満では、混入量が少な
いために混入効果が生じない。 As shown in Table 1 above, when the mixing amount of the short fibers F 3 , F 3 , ... Is 0.5 PHR or less or 3.0 PHR or more, the belt life is shortened. That is, when the mixing amount of the short fibers F 3 , F 3 , ... Exceeds 3.0 PHR , the bending rigidity of the V-belt 1 itself becomes high and the flexibility is impaired, so that rather high stress acts on the rubber portion. This is because the effect of suppressing the occurrence of fatigue cracks disappears. Further, if the amount of mixture is less than 0.5 PHR , the amount of mixture is small and the mixing effect does not occur.
次に、圧縮ゴム層６の下部6Bの短繊維F3，F3，…の混
入量は1.0PHRで一定とし、その長さのみ0mm,0.5mm,2mm,
4mm,6mm,8mmの間で変化させた６種類のサンプルについ
て、ベルト寿命試験を行った。なお、他の部分について
はすべて同じ構成とし、同じ試験機を使用している。そ
の結果を下記第２表に示す。ただし、第２表中、長さの
単位はmmである。Next, the mixing amount of the short fibers F 3 , F 3 , ... in the lower portion 6B of the compressed rubber layer 6 is kept constant at 1.0 PHR , and only the length is 0 mm, 0.5 mm, 2 mm,
A belt life test was conducted on 6 types of samples which were changed between 4 mm, 6 mm and 8 mm. All other parts have the same configuration and use the same testing machine. The results are shown in Table 2 below. However, in Table 2, the unit of length is mm.
上記第２表の結果から、短繊維F3，F3，…の長さが0.
5mm未満、或いは6.0mmを越えた場合には、ベルト寿命の
延長効果が得られない。これは、長さが、0.5mm未満で
は、疲労亀裂の進展部が短繊維F3，F3，…に突き当たる
確率が低くなって、亀裂停止効果が減少する一方、長さ
が6.0mmを越えると、曲げ剛性の上昇により、上記と同
じ理由でベルト寿命の増大効果が得られなくなるからで
ある。 From the results in Table 2 above, the length of the short fibers F 3 , F 3 , ... Is 0.
If it is less than 5 mm or exceeds 6.0 mm, the effect of extending the belt life cannot be obtained. This is because if the length is less than 0.5 mm, the probability that the fatigue crack growth portion will hit short fibers F 3 , F 3 , ... decreases, and the crack arresting effect will decrease, while the length exceeds 6.0 mm. Due to the increase in bending rigidity, the effect of increasing the belt life cannot be obtained for the same reason as above.
したがって、請求項（１）の考案では、接着ゴム層２
の上下にそれぞれ伸長ゴム層５と圧縮ゴム層６とが設け
られ、圧縮ゴム層６の上部6Aと伸長ゴム層５とにそれぞ
れベルト幅方向に配向する短繊維F1，F1，…及びF2，
F2，…が混入されているので、接着ゴム層２に作用する
集中応力を緩和することができる。Therefore, in the invention of claim (1), the adhesive rubber layer 2
And an expanded rubber layer 5 are provided above and below, respectively, and short fibers F 1 , F 1 , ... And F oriented in the belt width direction are respectively provided on the upper portion 6A of the compressed rubber layer 6 and the expanded rubber layer 5. 2 ,
Since F 2 , ... Are mixed, the concentrated stress acting on the adhesive rubber layer 2 can be relaxed.
ここで、上記のように接着ゴム層２への集中応力を緩
和するだけでは、伝動用Ｖベルト１の小形化に伴なう屈
曲力の増大による疲労亀裂の発生と、その速やかな伝播
による早期破損の虞れを解消しきれないが、本考案で
は、圧縮ゴム層６の下部6Bに、ベルト長手方向に配向す
る短繊維F3，F3，…が混入されているので、Ｖベルト１
のプーリとの係合時におけるベルト長手方向の屈曲に対
する強化作用により、疲労亀裂の発生を抑制することが
できる。また、短繊維F3，F3，…がベルト長手方向に配
向しているので、疲労亀裂が発生した場合にも、接着ゴ
ム層２に向かって進展する亀裂の先端が短繊維F3，F3，
…に突き当たってそれ以上の進展を阻止される確率が高
くなり、疲労亀裂の速やかな伝播が妨害される。よっ
て、屈曲疲労に対する抵抗性の向上を図ることができる
のである。Here, by only relaxing the concentrated stress on the adhesive rubber layer 2 as described above, fatigue cracks are generated due to an increase in bending force accompanying the downsizing of the transmission V-belt 1, and early propagation due to its rapid propagation. Although the risk of breakage cannot be eliminated, the V-belt 1 according to the present invention has short fibers F 3 , F 3 , ... Oriented in the longitudinal direction of the belt mixed in the lower portion 6B of the compressed rubber layer 6.
The occurrence of fatigue cracks can be suppressed by the reinforcing effect on the bending in the belt longitudinal direction during the engagement with the pulley. Further, since the short fibers F 3 , F 3 , ... Are oriented in the longitudinal direction of the belt, even if a fatigue crack occurs, the tip of the crack propagating toward the adhesive rubber layer 2 has short fibers F 3 , F 3 . 3 ,
There is a higher probability of hitting ... and preventing further progress, impeding the rapid propagation of fatigue cracks. Therefore, it is possible to improve resistance to bending fatigue.
そして、上記ベルト寿命試験の結果に示されるよう
に、圧縮ゴム層６の下部6Bに、長さ0.5〜6.0mmの短繊維
F3，F3，…を0.5〜3.0PHRの範囲で混入することによ
り、本考案の効果が有効に発揮されるのである。Then, as shown in the result of the belt life test, a short fiber having a length of 0.5 to 6.0 mm is provided in the lower portion 6B of the compressed rubber layer 6.
F 3, F 3, by incorporating ... in the range of 0.5 to 3.0 PHR, is the effect of the present invention is effectively exhibited.
請求項（２）の考案では、圧縮ゴム層６の下部6Bを形
成するゴムの硬度がJIS表示で60〜80°に設定されてお
り、特にＶベルト１の屈曲に対する柔軟性と応力に対す
る抵抗性とのバランスを良好に維持することができ、よ
って、上記請求項（１）の考案の実効を図ることができ
る。In the invention of claim (2), the hardness of the rubber forming the lower portion 6B of the compressed rubber layer 6 is set to 60 to 80 ° in JIS, and in particular, the flexibility of the V-belt 1 against bending and the resistance to stress are set. It is possible to maintain a good balance with the above, and therefore it is possible to achieve the effect of the invention of claim (1).
なお、上記第１実施例では、圧縮ゴム層６において、
ベルト幅方向繊維混入部分である上部6Aの直下にベルト
長手方向繊維混入部分である下部6Bを設けたが、上部6A
と下部6Bとは離れていてもよく、例えば両者の間にゴム
単体からなる部分が設けられていてもよい。In the first embodiment, in the compressed rubber layer 6,
The lower portion 6B, which is the fiber-containing portion in the belt longitudinal direction, is provided immediately below the upper portion 6A, which is the fiber-containing portion in the belt width direction.
And the lower portion 6B may be separated from each other, and for example, a portion made of a single rubber may be provided between them.
（第２実施例） 次に、請求項（３）の考案に係る第２実施例について
説明する。(Second Embodiment) Next, a second embodiment according to the invention of claim (3) will be described.
第４図は第２実施例に係るＶベルト１の断面構造を示
し、本実施例では、圧縮ゴム層６の下部6Bとゴム付帆布
７との間に、ベルト幅方向に延びる２枚の織布8,8が積
層して配設されている。その他の構成は、上記第１実施
例と同様である。FIG. 4 shows the cross-sectional structure of the V-belt 1 according to the second embodiment. In this embodiment, two weaves extending in the belt width direction are provided between the lower portion 6B of the compressed rubber layer 6 and the canvas 7 with rubber. The cloths 8, 8 are arranged in layers. Other configurations are similar to those of the first embodiment.
すなわち、請求項（３）の考案では、ベルト底面にお
ける疲労亀裂の発生を抑制することができ、よって、上
記請求項（１）の考案の効果をより顕著に発揮すること
ができる。That is, in the invention of claim (3), the occurrence of fatigue cracks on the bottom surface of the belt can be suppressed, and thus the effect of the invention of claim (1) can be more remarkably exhibited.
（第３実施例） 次に、請求項（４）の考案に係る第３実施例について
説明する。第５図は第３実施例に係るＶベルトの断面構
造を示し、圧縮ゴム層６の上部6Aと伸長ゴム層５とに
は、ベルト幅方向に延びる各々２枚のスダレ織布9,9が
積層して配設されている。その他の構成は、上記第１実
施例と同様である。(Third Embodiment) Next, a third embodiment according to the invention of claim (4) will be described. FIG. 5 shows a cross-sectional structure of a V-belt according to the third embodiment, in which the upper portion 6A of the compressed rubber layer 6 and the stretched rubber layer 5 each have two woven fabrics 9, 9 extending in the belt width direction. They are arranged in layers. Other configurations are similar to those of the first embodiment.
すなわち、請求項（４）の考案では、スダレ織布9,9
の補強効果により、屈曲時における引張強度が増大する
ので、その分ベルト厚みを低減することができる。した
がって、ベルト長さ方向の柔軟性が向上し、駆動系の小
形化に対応して、著効を発揮することができる。That is, in the invention of claim (4), the woven fabric 9,9
Since the tensile strength at the time of bending increases due to the reinforcing effect, the belt thickness can be reduced accordingly. Therefore, the flexibility in the belt length direction is improved, and a remarkable effect can be exhibited in response to downsizing of the drive system.
また、第６図は本実施例の変形例を示し、圧縮ゴム層
６の上部6A及び伸長ゴム層５には、各々２枚のスダレ織
布9,9が積層して配設される一方、圧縮ゴム層６の下部6
Aとその下方のゴム付帆布７との間には、上記第２実施
例と同様の２枚の織布8,8が積層して介設されている。
他の構成は、上記第１実施例と同様である。Further, FIG. 6 shows a modified example of the present embodiment, in which two woven fabrics 9 and 9 are laminated and arranged on the upper portion 6A of the compressed rubber layer 6 and the stretched rubber layer 5, respectively. Lower part 6 of compressed rubber layer 6
Between A and the canvas 7 with rubber below it, two woven fabrics 8, 8 similar to those in the second embodiment are laminated and interposed.
The other structure is similar to that of the first embodiment.
この変形例では、上記請求項（３）の考案と請求項
（４）の考案の効果を同時に発揮することができること
になる。In this modification, the effects of the invention of claim (3) and the invention of claim (4) can be exhibited at the same time.
（考案の効果） 以上説明したように、請求項（１）の考案によれば、
抗張体を埋設した接着ゴム層の上下に、伸長ゴム層及び
圧縮ゴム層を設け、伸長ゴム層と圧縮ゴム層の上部とに
それぞれ短繊維をベルト幅方向に配向させて混入する一
方、圧縮ゴム層のベルト幅方向繊維混入部分よりも下方
となる下部に、長さ0.5〜6.0mmの短繊維を混入量0.5〜
3.0重量部で混入し、その領域をベルト高さの3.0〜40％
として、各ゴム部からなる全体をゴム付帆布で被覆した
ので、伝動ベルトの駆動系の小形化に伴ない、伝動ベル
トに高い屈曲力が加わる場合にも、屈曲疲労に対する抵
抗性の向上を図ることができる。(Effect of device) As described above, according to the device of claim (1),
An extension rubber layer and a compression rubber layer are provided above and below the adhesive rubber layer in which the tensile body is embedded, and short fibers are mixed in the extension rubber layer and the upper portion of the compression rubber layer by orienting them in the belt width direction, respectively. In the lower part of the rubber layer, which is below the fiber width direction fiber mixing part, 0.5-6.0 mm length of short fiber is mixed in the amount of 0.5-6.0 mm.
It is mixed in 3.0 parts by weight, and the area is 3.0-40% of the belt height.
As the whole of each rubber part is covered with a canvas with rubber, the resistance to bending fatigue is improved even when a high bending force is applied to the transmission belt due to the downsizing of the drive belt drive system. be able to.
請求項（２）の考案によれば、上記請求項（２）の考
案において、圧縮ゴム層の下部のゴム硬度をJIS−Ａの
硬度表示で60〜80°に設定したので、伝動ベルトに加わ
る抵抗性と柔軟性とのバランスを良好に維持することが
できる。According to the invention of claim (2), in the invention of the above-mentioned claim (2), the rubber hardness of the lower portion of the compression rubber layer is set to 60 to 80 ° in JIS-A hardness display, so that it is added to the transmission belt. A good balance between resistance and flexibility can be maintained.
請求項（３）の考案によれば、上記請求項（１）又は
（２）の考案において、圧縮ゴム層の下面とゴム付帆布
との間に１枚〜複数枚の織布を介設したので、ベルト底
部の屈曲に対する抵抗性の補強効果により、疲労亀裂の
発生を抑制することができる。According to the invention of claim (3), in the invention of claim (1) or (2), one to a plurality of woven fabrics are provided between the lower surface of the compressed rubber layer and the rubber-attached canvas. Therefore, the occurrence of fatigue cracks can be suppressed by the reinforcing effect of resistance to bending of the belt bottom portion.
請求項（４）の考案によれば、上記請求項（１），
（２）又は（３）の考案において、圧縮ゴム層のベルト
幅方向繊維混入部分及び伸長ゴム層に、１枚〜複数枚の
スダレ織布をベルト幅方向に配して埋設したので、伝動
ベルトの柔軟性を向上させることができ、駆動系を小形
化した場合に、著効を発揮することができる。According to the invention of claim (4), the above-mentioned claim (1),
In the invention of (2) or (3), since one to a plurality of woven fabrics are arranged and embedded in the belt width direction in the belt width direction fiber mixed portion of the compression rubber layer and the extension rubber layer, the transmission belt The flexibility can be improved, and a remarkable effect can be exhibited when the drive system is downsized.
第１図〜第３図は本考案の第１実施例を示し、第１図は
伝動用Ｖベルトの構造を示す横断面図、第２図は圧縮ゴ
ム層のベルト長手方向繊維混入部分の構成を示す斜視
図、第３図はベルト寿命試験に使用した試験機の構成を
模式的に示す正面図、第４図は第２実施例に係るＶベル
トの構造を示す横断面図、第５図は第３実施例に係るＶ
ベルトの構造を示す横断面図、第６図は第３実施例の変
形例に係るＶベルトの構造を示す横断面図である。第７
図及び第８図は従来例を示し、第７図は伸長ゴム層と圧
縮ゴム層の上部にベルト幅方向繊維混入部分を設けた例
を示す横断面図、第８図はさらに圧縮ゴム層の下面とゴ
ム付帆布層との間に織布を積層して介設した例を示す横
断面図である。 １……Ｖベルト ２……接着ゴム層 ３……抗張体 ５……伸長ゴム層 6A……上部（ベルト幅方向繊維混入部分） 6B……下部（ベルト長手方向繊維混入部分） ７……ゴム付帆布 F1〜F3……短繊維1 to 3 show a first embodiment of the present invention, FIG. 1 is a cross-sectional view showing the structure of a transmission V-belt, and FIG. 2 is a constitution of a portion of a compressed rubber layer in which fibers are mixed in a belt longitudinal direction. Is a perspective view, FIG. 3 is a front view schematically showing the configuration of a testing machine used for a belt life test, and FIG. 4 is a cross-sectional view showing the structure of a V-belt according to the second embodiment. Is V according to the third embodiment
FIG. 6 is a transverse sectional view showing the structure of the belt, and FIG. 6 is a transverse sectional view showing the structure of the V-belt according to the modification of the third embodiment. Seventh
8 and 9 show a conventional example, FIG. 7 is a cross-sectional view showing an example in which a belt width direction fiber mixed portion is provided on an upper portion of an extended rubber layer and a compressed rubber layer, and FIG. It is a cross-sectional view showing an example in which a woven fabric is laminated and interposed between a lower surface and a rubber-coated canvas layer. 1 ... V-belt 2 ... Adhesive rubber layer 3 ... Tensile member 5 ... Stretching rubber layer 6A ... Top (belt width direction fiber mixing part) 6B ... Bottom (belt longitudinal direction fiber mixing part) 7 ... Canvas with rubber F 1 to F 3 …… Short fibers
Claims (4)
ゴム層が、下面に圧縮ゴム層がそれぞれ設けられ、上記
伸長ゴム層と圧縮ゴム層の上部とにはそれぞれ短繊維が
ベルト幅方向に配向せしめて混入されている一方、 上記圧縮ゴム層の上記ベルト幅方向繊維混入部分よりも
下方の下部には、長さ0.5〜6.0mmの短繊維が混入量0.5
〜3.0重量部でもってベルト長手方向に配向せしめて混
入され、かつ該ベルト長手方向繊維混入部分はベルト高
さの3.0〜40％の厚さに設定されており、 上記各ゴム層からなる全体はゴム付帆布により被覆され
ていることを特徴とする伝動用Ｖベルト。1. An expanded rubber layer is provided on the upper surface of an adhesive rubber layer in which a tensile body is embedded, and a compressed rubber layer is provided on the lower surface thereof, and short fibers are provided on the expanded rubber layer and the compressed rubber layer, respectively. While being oriented in the width direction and mixed, short fibers with a length of 0.5 to 6.0 mm are mixed in the lower part of the compressed rubber layer below the belt width direction fiber mixed part 0.5.
To 3.0 parts by weight in the longitudinal direction of the belt to be mixed, and the belt longitudinal direction fiber mixing portion is set to a thickness of 3.0 to 40% of the belt height. A transmission V-belt characterized by being covered with a rubber cloth.
のゴム硬度はJIS−Ａの硬度表示で60〜80°である請求
項（１）記載の伝動用Ｖベルト。2. The V-belt for transmission according to claim 1, wherein the rubber hardness of the portion of the compressed rubber layer where fibers are mixed in the longitudinal direction of the belt is 60 to 80 ° in JIS-A hardness display.
１枚〜複数枚の織布が介設されている請求項（１）又は
（２）記載の伝動用Ｖベルト。3. The transmission V-belt according to claim 1, wherein one or more woven fabrics are interposed between the lower surface of the compressed rubber layer and the rubber-attached canvas.
び伸長ゴム層には、１枚〜複数枚のスダレ織布がベルト
幅方向に配されて埋設されていることを特徴とする請求
項（１），（２）又は（３）記載の伝動用Ｖベルト。4. A belt-width direction fiber mixing portion of the compressed rubber layer and an extended rubber layer are characterized in that one to a plurality of woven fabrics are arranged and embedded in the belt width direction. The transmission V-belt according to (1), (2) or (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3690890U JP2507847Y2 (en) | 1990-04-05 | 1990-04-05 | V belt for transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3690890U JP2507847Y2 (en) | 1990-04-05 | 1990-04-05 | V belt for transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03127849U JPH03127849U (en) | 1991-12-24 |
| JP2507847Y2 true JP2507847Y2 (en) | 1996-08-21 |
Family
ID=31543554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3690890U Expired - Lifetime JP2507847Y2 (en) | 1990-04-05 | 1990-04-05 | V belt for transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2507847Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001330083A (en) * | 2000-05-22 | 2001-11-30 | Mitsuboshi Belting Ltd | V-ribbed belt |
-
1990
- 1990-04-05 JP JP3690890U patent/JP2507847Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001330083A (en) * | 2000-05-22 | 2001-11-30 | Mitsuboshi Belting Ltd | V-ribbed belt |
| JP4550224B2 (en) * | 2000-05-22 | 2010-09-22 | 三ツ星ベルト株式会社 | V-ribbed belt |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03127849U (en) | 1991-12-24 |
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