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JP3945892B2 - Conveyor belt - Google Patents
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JP3945892B2 - Conveyor belt - Google Patents

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Publication number
JP3945892B2
JP3945892B2 JP05491998A JP5491998A JP3945892B2 JP 3945892 B2 JP3945892 B2 JP 3945892B2 JP 05491998 A JP05491998 A JP 05491998A JP 5491998 A JP5491998 A JP 5491998A JP 3945892 B2 JP3945892 B2 JP 3945892B2
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JP
Japan
Prior art keywords
yarn
canvas layer
belt
weft
conveyor belt
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 - Fee Related
Application number
JP05491998A
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Japanese (ja)
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JPH11246018A (en
Inventor
修 戸田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Priority to JP05491998A priority Critical patent/JP3945892B2/en
Publication of JPH11246018A publication Critical patent/JPH11246018A/en
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Description

【0001】
【発明の属する技術分野】
本発明は、コンベヤベルトに関し、更に詳しくは、水硬性のスラリーなどを載せる帆布層表面の平坦性、ゴムの裏抜け、耐挫屈性を共に満足させるようにしたコンベヤベルトに関する。
【0002】
【従来の技術】
例えば、補強繊維を含んだ水硬性のスラリーを帯状体に成型し、それを所定の寸法に切断した後、加熱焼結して屋根瓦や壁板材などを製造する際に、ベルト本体の表面に帆布層を設けたコンベヤベルトが用いられている。補強繊維を含んだ水硬性のスラリーがこのコンベヤベルト上で搬送されながら帯状体に成型されるようになっている。
【0003】
このようなコンベヤベルトは、水硬性のスラリーが載置される表面の帆布層において、帆布層の表面が均一な平坦性を有すること、ゴムが帆布層表面に裏抜けしないこと、プーリーに対する追従性があり挫屈し難いことなどの特性が求められている。
帯状体の成型中に、スラリーが帆布層表面に付着するため、リターン側をコンベヤベルトが通過する際にスクレーパーで付着物を削ぎ落としながら帆布層表面が水洗いされる。その時、帆布層の表面に凹凸があると、その部分にスクレーパーが繰り返し当たるため、早期に糸切れを発生するので、均一な平坦性が要求されるのである。
【0004】
また、帆布層はその裏面にすり込まれたゴムを介してベルト本体に接着するようにしている。そのゴムすり込みの際に、ゴムが裏抜けして表面まで出ると、帆布層が水を含み難くなるため、ゴムが帆布層表面に裏抜けしないことが求められるのである。この特性は、織密度を高くすることにより得ることができるが、極端に高くすると、ヨコ糸の浮き上がりにより帆布層表面に凸部が生じるため、均一な平坦性を損なうことになる。
【0005】
また、挫屈してベルトに曲がり癖が発生すると、帆布層表面の平坦性が失われるので、上述したようにスクレーパーにより表面が擦られて早く糸切れを発生し易くなる。これらの特性は一方を良くすると他方が悪くなる傾向にあり、同時に満足させることが難しいという問題があった。
【0006】
【発明が解決しようとする課題】
本発明の目的は、水硬性のスラリーなどを載せる帆布層を有するコンベヤベルトにおいて、その帆布層表面の平坦性、ゴムの裏抜け、耐挫屈性を同時に満足させることが可能なコンベヤベルトを提供することにある。
【0007】
【課題を解決するための手段】
上記目的を達成する本発明は、ゴム層に補強層を埋設したベルト本体の少なくとも表面側に、裏面に接着用ゴムをすり込んだ帆布層を設けたコンベヤベルトにおいて、前記帆布層の綿糸または混綿糸からなるタテ糸とヨコ糸の単位面積当たりの使用重量比(タテ糸/ヨコ糸)を1.1〜4.1の範囲に設定し、かつ下記式でそれぞれ求められるタテ糸とヨコ糸のカバーファクター値Kの合計を4300〜4500にしたことを特徴とする。
【0008】
K=(D/糸の比重)1/2 ×糸密度
但し、D:デニール糸密度:本/5cm
このように水硬性のスラリーなどが載せられる帆布層の構造を上記のように特定し、タテ糸とヨコ糸の太さの関係と織密度との最適化を図るようにしたので、帆布層表面を平坦に形成することができると共に、帆布層裏面にすり込んだ接着用ゴムが表面に抜け出るのを抑制することが可能になり、更にプーリーに対して容易に追従し、挫屈し難くすることができる。
【0009】
【発明の実施の形態】
以下、本発明の構成について図に示す実施形態を参照して具体的に説明する。
図1は、本発明のコンベヤベルトの一例を示し、補強繊維を含んだ水硬性のスラリーを搬送中に帯状体に成型するのに使用されるものであって、1はベルト本体、2はゴム層、3は補強層、4は帆布層である。ゴム層2に2層の補強層3,3を埋設して帯状のベルト本体1が構成され、このベルト本体1の表面(ベルトをエンドレス状に接続した時の外側面)に帆布層4が設けられている。
【0010】
帆布層4は、織られたタテ糸とヨコ糸の単位面積当たりの使用重量比(タテ糸/ヨコ糸)が1.1〜4.1の範囲に設定されている。この重量比が1.1より小さいと、タテ糸が蛇行(クリンプ)するタテ曲がり構造になり易くなるため、タテ糸が摩耗し易くなる。逆に4.1より大きいと、プーリー追従性が悪化し、挫屈が発生し易くなる。
【0011】
また、帆布層4は、K=(D/糸の比重)1/2 ×糸密度の式で定義されるカバーファクター値Kにおいて、タテ糸とヨコ糸のカバーファクター値Kの合計が4300〜4500の範囲になっている。但し、式におけるDはデニール(繊度)、糸密度は5cm幅当たりの糸の本数〔本/5cm〕である。カバーファクター値Kの合計が4300未満では織密度が低下してゴムの裏抜けが発生し易くなる。逆に4500を越えると織密度が密となり過ぎる結果、タテ糸の収縮によりヨコ糸に浮き上がりが発生し、平坦性が悪くなる。
【0012】
このように本発明では、水硬性のスラリーなどが載置される帆布層4の構造を上記のように特定することにより、タテ糸とヨコ糸の太さの関係並びに織密度を最適にし、帆布層4の表面4aの均一な平坦性を得ることができ、かつ接着用にすり込んだゴムが表面4aまで抜ける、所謂、ゴムの裏抜けを抑えることができると共に、プーリーに対する追従性があって挫屈し難くすることができる。従って、ベルト耐久性を向上することができる。
【0013】
本発明において、帆布層4の織組織としては、従来と同様にすることができ、例えば、平織やバスケット織にすることができる。それらの織方としては、シャトル織、レピア織のいずれであってよいが、好ましくはレピア織がよい。
合計のカバーファクター値は上述のようにしたタテ糸とヨコ糸における各カバーファクター値Kとしては、タテ糸が2150〜3600、ヨコ糸が860〜2250の範囲にするのがよい。
【0014】
タテ糸、ヨコ糸に使用される糸としては、綿糸や混綿糸が用いられる。混綿糸としては、綿とポリエチレンテレフタレート(PET)を混ぜたものなどを好ましく挙げることができる。上記実施形態では、表面側に帆布層4を配設する構造にしたが、本発明は、裏面側にも上述した構成の帆布層を配置する構造であってもよい。
【0015】
【実施例】
図1に示す構成のコンベヤベルトにおいて、表1のように帆布層のタテ糸とヨコ糸の単位面積当たりの使用重量比(タテ糸/ヨコ糸)とカバーファクター値Kの合計を変えた本発明ベルト1〜6と比較ベルト1〜4とをそれぞれ作製した。各試験ベルトの肉厚は15mmで共通である。なお、表1に帆布層のタテ糸とヨコ糸の材質、撚構造、織密度、使用重量も示す。
【0016】
これら各試験ベルトを以下に示す測定条件により、耐挫屈性、平坦性の評価試験を行うと共に、各試験ベルトにおける帆布層のゴム裏抜けの評価試験を以下に示す条件により行ったところ、表1に示す結果を得た。
【0017】
耐挫屈性
各試験ベルトを直径100mm〜500mmの範囲で50mm毎に直径を変化させた各プーリーに巻き付けた時の追従性により、耐挫屈性を評価した。直径200mmのプーリーに完全に追従したものを○、追従せずに挫屈したものを×と評価した。
【0018】
平坦性
各試験ベルトにおいて、ヨコ糸の浮き現象とタテ糸の曲がり現象を目視により観察した。ヨコ糸に浮きが発生したもの、タテ糸の蛇行の振り幅がヨコ糸よりも極端に大きくなったもの(クリンプ)をそれぞれ×、それ以外の平坦性が良好なものを○と評価した。
【0019】
ゴムの裏抜け
各試験ベルトに使用される帆布層の裏面に未加硫ゴムシートを配置し、0.25MPaの圧力で20分プレス加硫を行った後、帆布層の表面からゴムが滲み出ないものを○、滲み出たものを×と評価した。
【0020】
【表1】

Figure 0003945892
【0021】
表1から明らかなように、帆布層のタテ糸とヨコ糸の単位面積当たりの使用重量比とカバーファクター値Kの合計を特定した本発明ベルトは、耐挫屈性、平坦性、帆布層の耐ゴム裏抜け性がいずれも良好であることが判る。
【0022】
【発明の効果】
上述したように本発明は、ベルト本体の表面側に設けた帆布層のタテ糸とヨコ糸の単位面積当たりの使用重量比と、タテ糸とヨコ糸のカバーファクター値の合計値を上記のように特定したので、帆布層表面の平坦性、ゴムの裏抜け、耐挫屈性を同時に満足することができる。
【図面の簡単な説明】
【図1】本発明のコンベヤベルトの一例をベルト幅方向縦断面で示す要部断面図である。
【符号の説明】
1 ベルト本体 2 ゴム層
3 補強層 4 帆布層
4a 表面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a conveyor belt, and more particularly to a conveyor belt that satisfies both the flatness of the surface of a canvas layer on which a hydraulic slurry or the like is placed, rubber penetration, and buckling resistance.
[0002]
[Prior art]
For example, when a hydraulic slurry containing reinforcing fibers is formed into a band-shaped body, cut into a predetermined size, and then heated and sintered to produce roof tiles or wall panels, the surface of the belt body A conveyor belt provided with a canvas layer is used. A hydraulic slurry containing reinforcing fibers is formed into a strip while being conveyed on the conveyor belt.
[0003]
In such a conveyor belt, the surface of the canvas layer on which the hydraulic slurry is placed has a uniform flatness, the rubber does not pass through the surface of the canvas layer, and the followability to the pulley. There are demands for characteristics such as being difficult to buckle.
Since the slurry adheres to the surface of the canvas layer during the molding of the belt-like body, the surface of the canvas layer is washed with water while scraping off the adhering matter with a scraper when the conveyor belt passes through the return side. At that time, if the surface of the canvas layer is uneven, the scraper repeatedly hits the portion, and yarn breakage occurs at an early stage, so that uniform flatness is required.
[0004]
In addition, the canvas layer is bonded to the belt body through rubber rubbed into the back surface thereof. When the rubber is rubbed, if the rubber penetrates to the surface and the canvas layer hardly contains water, it is required that the rubber does not penetrate the surface of the canvas layer. This characteristic can be obtained by increasing the weave density, but if it is extremely high, a convex portion is generated on the surface of the canvas layer due to the lifting of the weft yarn, so that uniform flatness is impaired.
[0005]
Further, when the belt is bent and the belt is bent, the flatness of the surface of the canvas layer is lost. Therefore, as described above, the surface is rubbed by the scraper and yarn breakage is likely to occur quickly. There is a problem that when one of these characteristics is improved, the other tends to be worse, and at the same time, it is difficult to satisfy them.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a conveyor belt having a canvas layer on which a hydraulic slurry or the like is placed, which can simultaneously satisfy the flatness of the canvas layer surface, rubber penetration, and buckling resistance. There is to do.
[0007]
[Means for Solving the Problems]
The present invention to achieve the above object, at least on the surface side of the belt body which is embedded a reinforcing layer to the rubber layer, in a conveyor belt having a fabric layer rubbed the bonding rubber on the back, cotton or cotton mixing yarns of the canvas layer The weight ratio of warp and weft per unit area (warp / weft) per unit area is set in the range of 1.1 to 4.1, and the warp and weft cover obtained by the following formulas, respectively. The total of the factor values K is 4300-4500.
[0008]
K = (D / yarn density) 1/2 × yarn density where, D: denier yarn Density: This / 5 cm
In this way, the structure of the canvas layer on which hydraulic slurry and the like are placed is specified as described above, and the relationship between the warp and weft thread thickness and the weave density is optimized, so the surface of the canvas layer Can be formed flat, and it is possible to suppress the adhesive rubber that has rubbed into the back of the canvas layer from slipping out to the surface, and can easily follow the pulley and be difficult to buckle. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be specifically described with reference to the embodiments shown in the drawings.
FIG. 1 shows an example of a conveyor belt according to the present invention, which is used to form a hydraulic slurry containing reinforcing fibers into a belt-like body during transportation. Layers 3 and 3 are reinforcing layers and 4 is a canvas layer. A belt-like belt body 1 is formed by embedding two reinforcing layers 3 and 3 in the rubber layer 2, and a canvas layer 4 is provided on the surface of the belt body 1 (the outer surface when the belt is connected endlessly). It has been.
[0010]
The canvas layer 4 has a weight ratio (warp / weft) per unit area of the woven warp and weft yarns set in a range of 1.1 to 4.1. If the weight ratio is less than 1.1, the warp yarn is likely to be worn because the warp yarn is likely to bend in a meandering structure. On the other hand, if it is larger than 4.1, the pulley followability is deteriorated and buckling is likely to occur.
[0011]
The canvas layer 4 has a cover factor value K defined by a formula of K = (D / specific gravity of yarn) 1/2 × thread density, and the total of the cover factor values K of warp and weft is 4300-4500. It is in the range. However, D in the formula is denier (fineness), and the yarn density is the number of yarns per 5 cm width [pieces / 5 cm]. If the total of the cover factor values K is less than 4300, the weave density is lowered and rubber breakthrough is likely to occur. On the other hand, if it exceeds 4500, the weave density becomes too dense. As a result, the warp yarn is lifted and the weft is lifted, resulting in poor flatness.
[0012]
As described above, in the present invention, by specifying the structure of the canvas layer 4 on which hydraulic slurry or the like is placed as described above, the relation between the thickness of the warp yarn and the weft yarn and the weave density are optimized, and the canvas A uniform flatness of the surface 4a of the layer 4 can be obtained, and the rubber rubbed for bonding can be removed to the surface 4a, so-called rubber back-through can be suppressed, and the pulley can follow the pulley. It can be made difficult to bend. Therefore, belt durability can be improved.
[0013]
In the present invention, the woven structure of the canvas layer 4 can be the same as the conventional one, and for example, a plain weave or a basket weave can be used. The weaving method may be either a shuttle weave or a rapier weave, but a rapier weave is preferred.
The total cover factor value is preferably in the range of 2150 to 3600 for the warp yarn and 860 to 2250 for the warp yarn as the cover factor values K for the warp yarn and the weft yarn as described above.
[0014]
Cotton yarn and mixed cotton yarn are used as warp yarn and weft yarn. Preferred examples of the mixed cotton yarn include a mixture of cotton and polyethylene terephthalate (PET). In the above embodiment, the canvas layer 4 is disposed on the front surface side. However, the present invention may have a structure in which the canvas layer having the above-described configuration is disposed on the back surface side.
[0015]
【Example】
In the conveyor belt having the structure shown in FIG. 1, the present invention is such that, as shown in Table 1, the total weight ratio of warp yarn and weft yarn per unit area (warp yarn / weft yarn) and the cover factor value K are changed as shown in Table 1. Belts 1 to 6 and comparative belts 1 to 4 were produced, respectively. The thickness of each test belt is 15 mm and is common. Table 1 also shows the warp and weft material, twist structure, weave density, and weight used for the canvas layer.
[0016]
Each of these test belts was subjected to an evaluation test of buckling resistance and flatness under the measurement conditions shown below, and an evaluation test of the rubber layer penetration of the canvas layer in each test belt was performed under the following conditions. The result shown in 1 was obtained.
[0017]
Buckling resistance The buckling resistance was evaluated by the followability when each test belt was wound around each pulley having a diameter of 100 mm to 500 mm and the diameter of each test belt being changed every 50 mm. The one that completely followed a pulley with a diameter of 200 mm was evaluated as ◯, and the one that did not follow and was crooked was evaluated as ×.
[0018]
Flatness In each test belt, the floating phenomenon of the weft yarn and the bending phenomenon of the warp yarn were visually observed. The case where the weft was lifted, the case where the width of the meandering of the warp yarn was extremely larger than that of the weft (crimp) was evaluated as x, and the case where the other flatness was good was evaluated as ○.
[0019]
Rubber unrolling After placing an unvulcanized rubber sheet on the back of the canvas layer used for each test belt and press vulcanizing at a pressure of 0.25 MPa for 20 minutes, rubber exudes from the surface of the canvas layer. Those not present were evaluated as ◯, and those exuded as x.
[0020]
[Table 1]
Figure 0003945892
[0021]
As is apparent from Table 1, the belt of the present invention, which specifies the total weight ratio of the warp yarn and the weft yarn per unit area of the canvas layer and the cover factor value K, has the resistance to buckling, flatness, canvas layer It can be seen that the rubber penetration resistance is good.
[0022]
【The invention's effect】
As described above, according to the present invention, the weight ratio per unit area of the warp and weft of the canvas layer provided on the surface side of the belt body and the total value of the cover factor value of the warp and weft are as described above. Therefore, the flatness of the surface of the canvas layer, the rubber penetration, and the buckling resistance can be satisfied at the same time.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing an example of a conveyor belt of the present invention in a longitudinal section in the belt width direction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Belt body 2 Rubber layer 3 Reinforcement layer 4 Canvas layer 4a Surface

Claims (3)

ゴム層に補強層を埋設したベルト本体の少なくとも表面側に、裏面に接着用ゴムをすり込んだ帆布層を設けたコンベヤベルトにおいて、前記帆布層の綿糸または混綿糸からなるタテ糸とヨコ糸の単位面積当たりの使用重量比(タテ糸/ヨコ糸)を1.1〜4.1の範囲に設定し、かつ下記式でそれぞれ求められるタテ糸とヨコ糸のカバーファクター値Kの合計を4300〜4500にしたコンベヤベルト。
K=(D/糸の比重)1/2 ×糸密度
但し、D:デニール糸密度:本/5cm
In a conveyor belt having a canvas layer in which an adhesive rubber is rubbed on the back surface at least on the front surface side of a belt body in which a reinforcing layer is embedded in a rubber layer, a unit of warp yarn and weft yarn made of cotton yarn or mixed cotton yarn of the canvas layer The use weight ratio per area (warp / weft) is set in the range of 1.1 to 4.1, and the total of the cover factor values K of warp and weft obtained by the following formulas is 4300 to 4500, respectively. Conveyor belt.
K = (D / yarn density) 1/2 × yarn density where, D: denier yarn Density: This / 5 cm
前記帆布層を前記ベルト本体の裏面側にも配置した請求項1に記載のコンベヤベルト。The conveyor belt according to claim 1, wherein the canvas layer is also disposed on the back side of the belt body . 補強繊維を含んだ水硬性のスラリーを搬送中に帯状体に成型するのに使用される請求項1または2に記載のコンベヤベルト。The conveyor belt according to claim 1 or 2, which is used to form a hydraulic slurry containing reinforcing fibers into a belt-like body during conveyance .
JP05491998A 1998-03-06 1998-03-06 Conveyor belt Expired - Fee Related JP3945892B2 (en)

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JP3945892B2 true JP3945892B2 (en) 2007-07-18

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JP5018005B2 (en) * 2006-10-12 2012-09-05 横浜ゴム株式会社 Conveyor belt for shot blasting equipment
JP5920241B2 (en) * 2013-02-22 2016-05-18 横浜ゴム株式会社 Manufacturing method of laminate
JP7059523B2 (en) * 2017-06-12 2022-04-26 横浜ゴム株式会社 Conveyor belt joining method
CN112109349A (en) * 2020-09-09 2020-12-22 上海永利输送系统有限公司 TPU type conveying belt and preparation method and application thereof

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JPH1029711A (en) * 1996-07-10 1998-02-03 Bando Chem Ind Ltd Transport belt and lap joint method for transport belt

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