JP2017179668A - Conveyer belt fiber reinforcement layer and conveyer belt - Google Patents

Conveyer belt fiber reinforcement layer and conveyer belt Download PDF

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JP2017179668A
JP2017179668A JP2016071333A JP2016071333A JP2017179668A JP 2017179668 A JP2017179668 A JP 2017179668A JP 2016071333 A JP2016071333 A JP 2016071333A JP 2016071333 A JP2016071333 A JP 2016071333A JP 2017179668 A JP2017179668 A JP 2017179668A
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width direction
conveyor belt
belt
fiber
elongation
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JP6724489B2 (en
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奈那 田代
Nana Tashiro
奈那 田代
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Priority to JP2016071333A priority Critical patent/JP6724489B2/en
Priority to AU2017242170A priority patent/AU2017242170A1/en
Priority to CN201780016521.8A priority patent/CN108712991A/en
Priority to PCT/JP2017/007810 priority patent/WO2017169465A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B65G15/34—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft

Abstract

PROBLEM TO BE SOLVED: To provide a conveyer belt fiber reinforcement layer and a conveyer belt, which can improve tear resistance at both ends in width direction of the conveyor belt.SOLUTION: Warp 4 extends in the longer direction and weft 5 extends in the width direction in a fabric structure. The elongation of a fiber reinforcement layer 3 of the fabric structure at both ends R1 in the width direction under 1/10 of the cutting load is set to 110% or higher and 200% or less of the elongation at a center part R2 in width direction. The fiber reinforcement layer 3 is embedded in a conveyor belt 1 as a core body 2 so that the extending direction of the warp 4 is matched to the belt longitudinal direction.SELECTED DRAWING: Figure 1

Description

本発明は、コンベヤベルト用繊維補強層およびコンベヤベルトに関し、さらに詳しくは、コンベヤベルトの幅方向両端部の耐引き裂き性を向上させることができるコンベヤベルト用繊維補強層およびコンベヤベルトに関するものである。   The present invention relates to a fiber reinforced layer for a conveyor belt and a conveyor belt, and more particularly to a fiber reinforced layer for a conveyor belt and a conveyor belt that can improve tear resistance at both ends in the width direction of the conveyor belt.

コンベヤベルトの搬送側では、ベルト幅方向両端部を中央部に対して上側に屈曲させてトラフ状にして使用される。そのため、ベルト幅方向両端部では中央部よりも引っ張り歪みが大きくなり、これに起因して引き裂きが生じ易い。   On the conveying side of the conveyor belt, both ends in the belt width direction are bent upward with respect to the central portion and used in a trough shape. For this reason, tensile strain is larger at both ends in the belt width direction than at the center, and tearing is likely to occur due to this.

コンベヤベルトには、張設した際の張力を負担する心体が埋設されているが、これら心体を工夫した様々なコンベヤベルトが提案されている（例えば、特許文献１、２）。特許文献１では、心体の耐挫屈性を損なうことなく生産性を向上させるために、平織構造の心体の縦糸および横糸を無撚り化するとともに、コンベヤベルトの伸びを特定範囲に限定することが提案されている。特許文献２では、横糸としてポリエステル繊維を採用した心体の品質を向上させるために、横糸の繊度および撚り数を特定範囲に限定することが提案されている。   Although the core which bears the tension | tensile_strength at the time of tensioning is embed | buried in the conveyor belt, the various conveyor belt which devised these cores is proposed (for example, patent documents 1, 2). In Patent Document 1, in order to improve productivity without impairing the buckling resistance of the core body, the warp and weft yarns of the core body of the plain woven structure are made non-twisted and the elongation of the conveyor belt is limited to a specific range. It has been proposed. In patent document 2, in order to improve the quality of the core which employ | adopted the polyester fiber as a weft, it has been proposed to limit the fineness and the number of twists of a weft to a specific range.

しかし、これら提案されている心体は、ベルト幅方向両端部に生じる引き裂きに注目したものではないため、コンベヤベルトがトラフ状になった状態では、ベルト幅方向両端部の引っ張り歪みが相対的に高くなる。それ故、ベルト幅方向両端部の耐引き裂き性を向上させることはできない。   However, these proposed cores do not pay attention to tearing that occurs at both ends in the belt width direction. Therefore, when the conveyor belt is in a trough shape, the tensile strain at both ends in the belt width direction is relatively Get higher. Therefore, the tear resistance at both ends in the belt width direction cannot be improved.

特開２００９−２７４７９８号公報JP 2009-274798 A 特開２０１４−２０１８５３号公報JP 2014-201853 A

本発明の目的は、コンベヤベルトの幅方向両端部の耐引き裂き性を向上させることができるコンベヤベルト用繊維補強層およびコンベヤベルトを提供することにある。   An object of the present invention is to provide a fiber reinforcing layer for a conveyor belt and a conveyor belt that can improve tear resistance at both ends in the width direction of the conveyor belt.

上記目的を達成するため本発明のコンベヤベルト用繊維補強層は、縦糸が長手方向に延在し、横糸が幅方向に延在する織構造のコンベヤベルト用繊維補強層において、前記繊維補強層の切断荷重の１／１０荷重時の幅方向両端部での伸度が、幅方向中央部での伸度の１１０％以上２００％以下であることを特徴とする。   In order to achieve the above object, the fiber reinforcement layer for a conveyor belt according to the present invention is a fiber reinforcement layer for a conveyor belt having a woven structure in which warp yarns extend in the longitudinal direction and weft yarns extend in the width direction. The elongation at both ends in the width direction when the cutting load is 1/10 is 110% to 200% of the elongation at the center in the width direction.

本発明のコンベヤベルトは、上記のコンベヤベルト用繊維補強層が、前記縦糸の延在方向をベルト長手方向にして心体として埋設されていることを特徴とする。   The conveyor belt according to the present invention is characterized in that the fiber reinforcing layer for the conveyor belt is embedded as a core body with the extending direction of the warp yarn being the belt longitudinal direction.

本発明によれば、繊維補強層の幅方向では、比較的低い引っ張り荷重での伸びが、両端部において相対的に大きくなっている。そのため、この繊維補強層をその縦糸の延在方向をベルト長手方向にして心体としてコンベヤベルトに埋設すれば、ベルト幅方向両端部の伸びが相対的に大きくなる。これにより、コンベヤベルトがトラフ状で使用されても、ベルト幅方向両端部の引っ張り歪みが緩和されるので、ベルト幅方向両端部の耐引き裂き性を向上させることが可能になる。   According to the present invention, in the width direction of the fiber reinforcement layer, the elongation with a relatively low tensile load is relatively large at both ends. Therefore, if this fiber reinforcing layer is embedded in the conveyor belt as a core body with the extending direction of the warp yarn as the belt longitudinal direction, the elongation at both ends in the belt width direction becomes relatively large. As a result, even if the conveyor belt is used in a trough shape, the tensile strain at both ends in the belt width direction is relieved, so that the tear resistance at both ends in the belt width direction can be improved.

ここで、前記織構造を２／２破れ綾織構造にするとよい。これにより、コンベヤベルトの耐衝撃性を向上させるには有利になる。   Here, the woven structure may be a 2/2 broken twill structure. This is advantageous for improving the impact resistance of the conveyor belt.

前記幅方向両端部における前記縦糸が例えばポリアミド繊維からなり、前記幅方向中央部における前記縦糸が例えばポリエステル繊維からなる仕様にする。この仕様によれば、コンベヤベルトがトラフ状になった状態において、ベルト幅方向両端部の伸びを相対的に大きくし易くなる。   The warp yarns at both ends in the width direction are made of, for example, polyamide fibers, and the warp yarns in the center portion in the width direction are made of, for example, polyester fibers. According to this specification, in a state where the conveyor belt is in a trough shape, the elongation at both ends in the belt width direction is relatively easily increased.

本発明のコンベヤベルトでは、前記心体が複数の補強層を積層した複層構造であり、この複層構造の最外周の補強層が前記コンベヤベルト用繊維補強層である仕様にすることもできる。この仕様により、本発明の繊維補強層による効果を効率的に得ることができる。   In the conveyor belt according to the present invention, the core body has a multilayer structure in which a plurality of reinforcing layers are laminated, and the outermost reinforcing layer of the multilayer structure can be a fiber reinforcing layer for the conveyor belt. . By this specification, the effect by the fiber reinforcement layer of this invention can be acquired efficiently.

本発明のコンベヤベルト用繊維補強層を埋設したコンベヤベルトを例示する横面図である。It is a side view which illustrates the conveyor belt which embed | buried the fiber reinforcement layer for conveyor belts of this invention. 図１のコンベヤベルトの平面図である。It is a top view of the conveyor belt of FIG. 図１の繊維補強層を拡大して平面視で例示する説明図である。It is explanatory drawing which expands the fiber reinforcement layer of FIG. 1, and illustrates it by planar view. 図１のコンベヤベルトを張設した状態を例示する説明図である。It is explanatory drawing which illustrates the state which stretched the conveyor belt of FIG. 図４のＡ−Ａ断面図である。It is AA sectional drawing of FIG.

以下、本発明のコンベヤベルト用繊維補強層およびコンベヤベルトを図に示した実施形態に基づいて説明する。   Hereinafter, the fiber reinforcing layer for a conveyor belt and the conveyor belt of the present invention will be described based on the embodiments shown in the drawings.

図１、図２に例示する本発明のコンベヤベルト１には、本発明のコンベヤベルト用繊維補強層３（以下、繊維補強層３という）が心体２として埋設されている。心体２は、張設されたコンベヤベルト１に生じる張力を負担する部材である。心体２の上下にはそれぞれ、上カバーゴム６、下カバーゴム７が配置されていて、心体２、上カバーゴム６および下カバーゴム７は加硫接着によって一体化している。心体２はベルト長手方向に連続していて、幅方向寸法はベルト幅よりも若干小さくなっている。これにより、コンベヤベルト１の幅方向両端は、心体２が存在していない耳ゴムになっている。   The conveyor belt 1 of the present invention illustrated in FIGS. 1 and 2 is embedded with a fiber reinforced layer 3 for conveyor belt (hereinafter referred to as a fiber reinforced layer 3) of the present invention as a core body 2. The core body 2 is a member that bears the tension generated in the stretched conveyor belt 1. An upper cover rubber 6 and a lower cover rubber 7 are disposed above and below the core body 2, respectively, and the core body 2, the upper cover rubber 6 and the lower cover rubber 7 are integrated by vulcanization adhesion. The core body 2 is continuous in the belt longitudinal direction, and the dimension in the width direction is slightly smaller than the belt width. Thereby, the width direction both ends of the conveyor belt 1 are ear rubber in which the core body 2 does not exist.

この実施形態では、心体２は、本発明の繊維補強層３が１層と、別の繊維補強層３ａの３層とが積層された４層構造になっている。本発明の繊維補強層３は、心体２の最外周の補強層になっている。心体２を構成する繊維補強層３、３ａの積層数はコンベヤベルト１に対する要求性能（剛性、伸び等）により決定され、この実施形態のような４層に限定されず、単層或いはその他の複数層にすることもできる。   In this embodiment, the core body 2 has a four-layer structure in which one fiber reinforcing layer 3 of the present invention and three layers of another fiber reinforcing layer 3a are laminated. The fiber reinforcing layer 3 of the present invention is the outermost reinforcing layer of the core body 2. The number of laminated fiber reinforced layers 3 and 3a constituting the core body 2 is determined by the required performance (rigidity, elongation, etc.) for the conveyor belt 1, and is not limited to the four layers as in this embodiment. Multiple layers can also be used.

本発明の繊維補強層３は、図３に例示するように、縦糸４が長手方向に延在し、横糸５が幅方向に延在する織構造になっている。繊維補強層３は、縦糸４の延在方向をベルト長手方向にして埋設される。即ち、縦糸４の長手方向がコンベヤベルト１の長手方向になり、横糸５の長手方向がコンベヤベルト１の幅方向になる。   As illustrated in FIG. 3, the fiber reinforcing layer 3 of the present invention has a woven structure in which the warp 4 extends in the longitudinal direction and the weft 5 extends in the width direction. The fiber reinforcing layer 3 is embedded with the extending direction of the warp yarns 4 being the belt longitudinal direction. That is, the longitudinal direction of the warp 4 is the longitudinal direction of the conveyor belt 1, and the longitudinal direction of the weft 5 is the width direction of the conveyor belt 1.

この実施形態では、繊維補強層３の織構造は２／２破れ綾織構造になっている。その他に、繊維補強層３の織構造としては、平織構造などの他の織構造を採用することもできる。   In this embodiment, the woven structure of the fiber reinforcing layer 3 is a 2/2 broken twill structure. In addition, as the woven structure of the fiber reinforcing layer 3, other woven structures such as a plain woven structure may be employed.

繊維補強層３は、繊維補強層３の切断荷重の１／１０荷重時の幅方向両端部Ｒ１での伸度Ｅ１が、幅方向中央部Ｒ２の伸度Ｅ２に比して大きくなっていて、幅方向中央部Ｒ２の伸度の１１０％以上２００％以下になっている。繊維補強層３の切断荷重の１／１０荷重時の伸度は、例えば、ＪＩＳ Ｋ６３２２のベルトの引張試験に準拠した試験によって測定する。   In the fiber reinforcement layer 3, the elongation E1 at the width direction both ends R1 at 1/10 load of the cutting load of the fiber reinforcement layer 3 is larger than the elongation E2 of the width direction central portion R2, It is 110% or more and 200% or less of the elongation of the width direction central portion R2. The elongation at the time of 1/10 load of the cutting load of the fiber reinforcing layer 3 is measured, for example, by a test based on a belt tensile test of JIS K6322.

繊維補強層３の幅方向中央部Ｒ２とは、例えば、繊維補強層３の幅方向中心ＣＲを中心にした繊維補強層３の全幅ＷＲの５０％〜６０％程度の領域である。幅方向両端部Ｒ１は、幅方向中央部Ｒ２以外の領域なので、繊維補強層３の幅方向両端からそれぞれ全幅ＷＲの２０％〜２５％程度の領域になる。心体２（繊維補強層３）の全幅ＷＲは、コンベヤベルト１の全幅ＷＢよりも若干小さい程度であり概ね同じである。そして、幅方向中心ＣＲとベルト幅方向中心ＣＢとは概ね一致した位置となるので、コンベヤベルト１のベルト幅方向両端部Ｚ１に繊維補強層３の幅方向両端部Ｒ１が埋設され、コンベヤベルト１のベルト幅方向中央部Ｚ２に繊維補強層３の幅方向中央部Ｒ２が埋設されることになる。   The center portion R2 in the width direction of the fiber reinforcement layer 3 is, for example, a region of about 50% to 60% of the total width WR of the fiber reinforcement layer 3 with the center CR in the width direction of the fiber reinforcement layer 3 as the center. Since both ends R1 in the width direction are regions other than the center portion R2 in the width direction, they are regions of about 20% to 25% of the total width WR from both ends in the width direction of the fiber reinforcement layer 3, respectively. The overall width WR of the core body 2 (fiber reinforcing layer 3) is slightly smaller than the overall width WB of the conveyor belt 1 and is substantially the same. Since the width direction center CR and the belt width direction center CB are substantially coincident with each other, the width direction both ends R1 of the fiber reinforcing layer 3 are embedded in the belt width direction both ends Z1 of the conveyor belt 1, and the conveyor belt 1 The width direction center portion R2 of the fiber reinforcement layer 3 is embedded in the belt width direction center portion Z2.

幅方向両端部Ｒ１での伸度Ｅ１を幅方向中央部Ｒ２の伸度Ｅ２に対して相対的に大きくするには、例えば、幅方向両端部Ｒ１、幅方向中央部Ｒ２それぞれにおける縦糸４の材質を変えて、幅方向両端部Ｒ１には相対的に伸びの大きな材質を用いる。具体的には、幅方向両端部Ｒ１における縦糸４をポリアミド繊維で構成し、幅方向中央部Ｒ２における縦糸４をポリエステル繊維で構成する。幅方向両端部Ｒ１における縦糸４には複数本のポリアミド繊維を撚ったマルチフィラメントヤーンを用いることも、モノフィラメントヤーンを用いることもできる。幅方向中央部Ｒ２における縦糸４には、複数本のポリエステル繊維を撚ったマルチフィラメントヤーンを用いることもモノフィラメントヤーンを用いることもできる。ポリアミド繊維としては、ナイロン６、ナイロン６６等を例示できる。   In order to increase the elongation E1 at both ends R1 in the width direction relative to the elongation E2 at the center portion R2 in the width direction, for example, the material of the warp 4 at each of the end portions R1 in the width direction and the center portion R2 in the width direction In other words, a material having a relatively large elongation is used for both ends R1 in the width direction. Specifically, the warp yarn 4 at both ends R1 in the width direction is made of polyamide fiber, and the warp yarn 4 at the center portion R2 in the width direction is made of polyester fiber. A multifilament yarn obtained by twisting a plurality of polyamide fibers can be used for the warp yarns 4 at both ends R1 in the width direction, or a monofilament yarn can be used. As the warp 4 in the central portion R2 in the width direction, a multifilament yarn obtained by twisting a plurality of polyester fibers can be used, or a monofilament yarn can be used. Examples of polyamide fibers include nylon 6, nylon 66, and the like.

コンベヤベルト１は、図４、図５例示するようにプーリ８ａ、８ｂの間に張設されて使用される。そして、搬送物１０を載せて運ぶ搬送側では、ベルト幅方向両端部Ｚ１は回転軸が水平に対して所定角度ａで傾斜した支持ローラ９により下面を支持され、ベルト幅方向中央部Ｚ２は回転軸が水平な支持ローラ９により下面を支持される。これにより、ベルト幅方向両端部Ｚ１（幅方向両端部Ｒ１）は、ベルト幅方向中央部Ｚ２（幅方向中央部Ｒ２）に対して上側に屈曲して、コンベヤベルト１はトラフ状になって使用される。   The conveyor belt 1 is used by being stretched between pulleys 8a and 8b as illustrated in FIGS. On the conveying side where the conveyed object 10 is carried, the belt width direction both ends Z1 are supported at the lower surface by the support roller 9 whose rotation axis is inclined at a predetermined angle a with respect to the horizontal, and the belt width direction central portion Z2 is rotated. The lower surface is supported by a support roller 9 whose axis is horizontal. As a result, the belt width direction both ends Z1 (width direction both ends R1) are bent upward with respect to the belt width direction center portion Z2 (width direction center portion R2), and the conveyor belt 1 is used in a trough shape. Is done.

そのため、心体２が負担する張力は、ベルト幅方向中央部Ｚ２（幅方向中央部Ｒ２）よりもベルト幅方向両端部Ｚ１（幅方向両端部Ｒ１）において相対的に大きくなる。これに伴い、ベルト幅方向両端部Ｚ１（幅方向両端部Ｒ１）ではベルト幅方向中央部Ｚ２（幅方向中央部Ｒ２）よりも引っ張り歪みが大きくなるため、引き裂きが生じ易くなる。即ち、ベルト幅方向両端部Ｚ１には、相対的に大きな引張り歪みに起因してベルト幅方向に延びる引き裂きが発生し易くなる。   Therefore, the tension applied to the core body 2 is relatively greater at the belt width direction both ends Z1 (width direction both ends R1) than at the belt width direction center Z2 (width direction center R2). As a result, the tensile strain is larger at the belt width direction both ends Z1 (width direction both ends R1) than at the belt width direction center Z2 (width direction center R2), so that tearing is likely to occur. That is, tearing extending in the belt width direction is likely to occur at both ends Z1 in the belt width direction due to relatively large tensile strain.

ところが、本発明では、心体２として埋設している繊維補強層３は、この繊維補強層３の切断荷重の１／１０荷重時の伸度が、幅方向両端部Ｒ１では幅方向中央部Ｒ２に比して相対的に大きくなっている。そのため、コンベヤベルト１がトラフ状になって使用されても、ベルト幅方向両端部Ｚ１（幅方向両端部Ｒ１）において繊維補強層３が相対的に大きく伸びることで、ベルト幅方向両端部Ｚ１の引っ張り歪みが緩和される。これに伴い、ベルト幅方向両端部Ｚ１の耐引き裂き性を向上させることが可能になる。ここで、維補強層３の切断荷重の１／１０荷重時の伸度を用いているのは、この１／１０荷重の大きさが、張設されたコンベヤベルト１の心体２（繊維補強層３、３ａ）が通常時に負担する張力と比較的近似したレベルであるためである。   However, in the present invention, the fiber reinforcing layer 3 embedded as the core body 2 has an elongation at 1/10 of the cutting load of the fiber reinforcing layer 3 at the width direction center portion R2 at the width direction both ends R1. It is relatively larger than Therefore, even if the conveyor belt 1 is used in a trough shape, the fiber reinforcing layer 3 extends relatively greatly at the belt width direction both ends Z1 (width direction both ends R1), so that the belt width direction both ends Z1 Tensile strain is relieved. Accordingly, it becomes possible to improve the tear resistance of the belt width direction both ends Z1. Here, the elongation at the time of 1/10 load of the cutting load of the fiber reinforcing layer 3 is used because the magnitude of this 1/10 load is the core body 2 of the stretched conveyor belt 1 (fiber reinforcement). This is because the layers 3, 3a) are at a level that is relatively close to the tension that is normally borne.

繊維補強層３の幅方向両端部Ｒ１での伸度Ｅ１が、幅方向中央部Ｒ２での伸度Ｅ２の１１０％未満では、幅方向中央部Ｒ２に対する幅方向両端部Ｒ１の相対的な伸びが過小であり、ベルト幅方向両端部Ｚ１の耐引き裂き性を向上させるには不十分になる。一方、方向両端部Ｒ１での伸度Ｅ１が、幅方向中央部Ｒ２での伸度Ｅ２の２００％超では、ベルト幅方向両端部Ｚ１が過剰に変形してコンベヤベルト１としての機能が低下する。   When the elongation E1 at both ends R1 in the width direction of the fiber reinforcement layer 3 is less than 110% of the elongation E2 at the center R2 in the width direction, the relative elongation of both ends R1 in the width direction with respect to the center R2 in the width direction is increased. It is too small, and is insufficient to improve the tear resistance at both ends Z1 in the belt width direction. On the other hand, if the elongation E1 at both ends R1 in the direction exceeds 200% of the elongation E2 at the central portion R2 in the width direction, both ends Z1 in the belt width direction are excessively deformed and the function as the conveyor belt 1 is deteriorated. .

心体２が複数の補強層を積層した積層構造の場合、すべての補強層を本発明の繊維補強層３にしてもよいが、コストを抑えるために、一部だけを本発明の繊維補強層３にして、残りは安価な汎用の別の補強層３ａにすることもできる。例えば、この実施形態のように、最外周の１層のみを本発明の繊維補強層３にする。或いは、最外周から１層目および２層目のみを本発明の繊維補強層３にする。   In the case where the core body 2 has a laminated structure in which a plurality of reinforcing layers are laminated, all the reinforcing layers may be the fiber reinforcing layer 3 of the present invention. 3 and the rest can be another inexpensive general-purpose reinforcing layer 3a. For example, as in this embodiment, only the outermost peripheral layer is the fiber reinforcing layer 3 of the present invention. Alternatively, only the first and second layers from the outermost periphery are used as the fiber reinforcing layer 3 of the present invention.

積層構造の心体２において、コンベヤベルト１がトラフ状になった場合に、最も引張り歪みが大きくなるのは、最外周の補強層である。それ故、最外周の補強層として本発明の繊維補強層３を用いると、繊維補強層３の使用量を最小限にしながらも、上述した繊維補強層３よる効果を効率的に得ることができる。   In the core body 2 having a laminated structure, when the conveyor belt 1 becomes a trough shape, the outermost reinforcing layer has the largest tensile strain. Therefore, when the fiber reinforcing layer 3 of the present invention is used as the outermost reinforcing layer, the above-described effect of the fiber reinforcing layer 3 can be efficiently obtained while minimizing the amount of the fiber reinforcing layer 3 used. .

また、繊維補強層３の織構造を２／２破れ綾織構造にすると、平織構造等に比してコンベヤベルト１の耐衝撃性を向上させることができる。コンベヤベルト１における引き裂きは、基本的に、投入される搬送物１０によって生じる局所的な応力集中に起因し、これによりコンベヤベルト１が破損に至ることもある。平織構造では応力集中した場合、縦糸と横糸が１本ずつ交差している為、それぞれの１本に全ての負荷がかかるが、２／２破れ綾織構造であれば、縦糸と横糸がそれぞれ２本引き揃えられている部分がある為、その２本に衝撃を分散させることができる。したがって、コンベヤベルト１（特に上カバーゴム６および繊維補強層３）が損傷し難くなる。   Further, when the woven structure of the fiber reinforcing layer 3 is a 2/2 broken twill structure, the impact resistance of the conveyor belt 1 can be improved as compared with a plain woven structure or the like. The tearing in the conveyor belt 1 is basically caused by a local stress concentration caused by the loaded article 10, which may cause the conveyor belt 1 to break. In the plain weave structure, when the stress is concentrated, one warp and one weft intersect each other, so all loads are applied to each one. However, in the case of a 2/2 broken twill structure, two warps and wefts each. Since there is a part that is aligned, the impact can be distributed to the two. Therefore, the conveyor belt 1 (particularly the upper cover rubber 6 and the fiber reinforcing layer 3) is hardly damaged.

コンベヤベルト１に投入される搬送物１０によって直接的に衝撃を受けるのは上カバーゴム６である。したがって、積層構造の心体２では、最外周の補強層として２／２破れ綾織構造の繊維補強層３を用いると、繊維補強層３の使用量を最小限にしながらも、上述した２／２破れ綾織構造よる効果を効果的に得ることができる。   It is the upper cover rubber 6 that is directly impacted by the conveyed product 10 put into the conveyor belt 1. Therefore, in the core body 2 having the laminated structure, when the fiber reinforcing layer 3 having the 2/2 broken twill structure is used as the outermost reinforcing layer, the above-mentioned 2/2 is achieved while minimizing the amount of the fiber reinforcing layer 3 used. The effect by the torn twill structure can be obtained effectively.

コンベヤベルト用繊維補強層のサンプルとして表１に示す６種類（従来例、比較例１、２、実施例１〜３）を製造した。すべてのサンプルの横糸はポリエステル繊維にした。表１中の１／１０荷重時の伸度とは、それぞれのサンプルの縦糸の延在方向に対する切断荷重の１／１０荷重時の伸度であり、幅方向端部における伸度Ｅ１および幅方向中央部における伸度Ｅ２を測定した。表１中の幅方向両端部寸法／全幅とは、幅方向両端部の幅寸法の合計値を、全幅（幅方向両端部の幅寸法の合計値と幅方向中央部の幅寸法との合計値）で除した比率（％）である。表１中のＰＥＴはポリエステル、Ｎ６６はナイロン６６を意味する。   Six types (conventional examples, comparative examples 1 and 2 and examples 1 to 3) shown in Table 1 were manufactured as samples of the fiber reinforced layer for the conveyor belt. The weft yarn of all samples was polyester fiber. The elongation at 1/10 load in Table 1 is the elongation at 1/10 load of the cutting load with respect to the extending direction of the warp yarn of each sample, and the elongation E1 and the width direction at the end in the width direction. The elongation E2 at the center was measured. The width direction both ends dimension / full width in Table 1 is the total value of the width dimensions at both ends in the width direction. ) Divided by (). In Table 1, PET means polyester and N66 means nylon 66.

それぞれのサンプルを用いて表１に示すコンベヤベルト６種類（従来例ベルト、比較例ベルト１、２、実施例ベルト１〜３）を製造した。それぞれのコンベヤベルトには繊維補強層を４層埋設し、最外周の１層の繊維補強層のみを異ならせた。これらコンベヤベルトに対して下記の３つの性能を測定し、その結果は表１に示すとおりであった。   Using each sample, six types of conveyor belts shown in Table 1 (conventional belts, comparative belts 1 and 2 and example belts 1 to 3) were manufactured. In each conveyor belt, four fiber reinforcing layers were embedded, and only the outermost one fiber reinforcing layer was made different. The following three performances were measured for these conveyor belts, and the results are shown in Table 1.

Figure 2017179668
Figure 2017179668

[幅方向両端部の耐引き裂き性]
それぞれのコンベヤベルトのカットサンプルを用いて、コンベヤベルトの幅方向端部でのベルト幅方向に対する耐引き裂き性を評価した。この評価測定は、所定の引き裂きが生じるまでに要するエネルギーを算出し、算出したエネルギーの大きさを指数で示した。引き裂き抵抗力の測定は、ＪＩＳ Ｌ１０９６に準拠した方法で行った。従来例ベルト１の結果を基準の指数１００にして評価した。指数の数値が大きい程、耐引き裂き性に優れていることを意味する。 [Tear resistance at both ends in the width direction]
Using the cut sample of each conveyor belt, the tear resistance in the belt width direction at the end in the width direction of the conveyor belt was evaluated. In this evaluation measurement, the energy required until a predetermined tearing was calculated, and the magnitude of the calculated energy was indicated by an index. The tear resistance was measured by a method based on JIS L1096. The result of the conventional belt 1 was evaluated with a reference index of 100. The larger the index value, the better the tear resistance.

[幅方向中央部の耐衝撃性]
それぞれのコンベヤベルトのカットサンプルを用いて、コンベヤベルトの幅方向中央部における耐衝撃性を評価した。この評価測定は、下端が尖った所定重量の重りを水平に張設したコンベヤベルトの上カバーゴムの上に落下させて、重りがコンベヤベルトを厚さ方向に貫通した際の落下高さを測定した。従来例ベルト１の結果を基準の指数１００にして評価した。数値の数値が大きい程、耐衝撃性に優れていることを意味する。 [Shock resistance at the center in the width direction]
Using the cut samples of each conveyor belt, the impact resistance at the center in the width direction of the conveyor belt was evaluated. In this evaluation measurement, a weight of a specified weight with a sharp bottom is dropped on the upper cover rubber of a conveyor belt that is stretched horizontally, and the drop height when the weight penetrates the conveyor belt in the thickness direction is measured. did. The result of the conventional belt 1 was evaluated with a reference index of 100. The larger the numerical value, the better the impact resistance.

[クリープ性]
それぞれのコンベヤベルトのカットサンプルに、ベルト長手方向に所定の引張り力を負荷し続けて、所定時間後のベルト長手方向の伸びを測定してクリープ性能を評価した。従来例ベルト１の結果を基準の指数１００にして評価した。指数の数値が大きい程、クリープによる伸びが小さくて優れていることを意味する。 [Creep property]
Creep performance was evaluated by continuously applying a predetermined tensile force to the cut samples of each conveyor belt in the longitudinal direction of the belt and measuring the elongation in the longitudinal direction of the belt after a predetermined time. The result of the conventional belt 1 was evaluated with a reference index of 100. The larger the index value, the smaller the creep elongation and the better.

表１の結果から実施例ベルト１〜３は従来例ベルトに比して、ベルト幅方向両端部の耐引き裂き性が向上し、クリープ性能は同等であることが分かる。また、幅方向中央部の耐衝撃性については、実施例ベルト１は従来例ベルトと同等であり、実施例ベルト２、３は従来例に比して向上していることが分かる。   From the results of Table 1, it can be seen that the belts of Examples 1 to 3 have improved tear resistance at both ends in the belt width direction and the creep performance is equivalent to that of the conventional belt. Moreover, about the impact resistance of the width direction center part, Example belt 1 is equivalent to a prior art belt, and it turns out that Example belts 2 and 3 are improved compared with a prior art example.

１ コンベヤベルト
２ 心体
３ 繊維補強層
３ａ 他の繊維補強層
４ 縦糸
５ 横糸
６ 上カバーゴム
７ 下カバーゴム
８ａ、８ｂ プーリ
９ 支持ローラ
１０ 搬送物 DESCRIPTION OF SYMBOLS 1 Conveyor belt 2 Core body 3 Fiber reinforcement layer 3a Other fiber reinforcement layers 4 Warp yarn 5 Weft yarn 6 Upper cover rubber 7 Lower cover rubber 8a, 8b Pulley 9 Support roller 10 Conveyed material

Claims (5)

縦糸が長手方向に延在し、横糸が幅方向に延在する織構造のコンベヤベルト用繊維補強層において、
前記繊維補強層の切断荷重の１／１０荷重時の幅方向両端部での伸度が、幅方向中央部での伸度の１１０％以上２００％以下であることを特徴とするコンベヤベルト用繊維補強層。 In a fiber reinforced layer for a conveyor belt having a woven structure in which warp yarns extend in the longitudinal direction and weft yarns extend in the width direction,
The fiber for conveyor belts, wherein the elongation at both ends in the width direction at 1/10 load of the cutting load of the fiber reinforcing layer is 110% or more and 200% or less of the elongation at the center in the width direction. Reinforcement layer. 前記織構造が２／２破れ綾織構造である請求項１に記載のコンベヤベルト用繊維補強層。   The fiber reinforced layer for a conveyor belt according to claim 1, wherein the woven structure is a 2/2 broken twill structure. 前記幅方向両端部における前記縦糸がポリアミド繊維からなり、前記幅方向中央部における前記縦糸がポリエステル繊維からなる請求項１または２に記載のコンベヤベルト用繊維補強層。   The fiber reinforcing layer for a conveyor belt according to claim 1 or 2, wherein the warp yarns at both ends in the width direction are made of polyamide fibers, and the warp yarns at the center portion in the width direction are made of polyester fibers. 請求項１〜３のいずれかに記載のコンベヤベルト用繊維補強層が、前記縦糸の延在方向をベルト長手方向にして心体として埋設されているコンベヤベルト。   The conveyor belt in which the fiber reinforcement layer for conveyor belts in any one of Claims 1-3 is embed | buried as a core body by making the extending direction of the said warp yarn into a belt longitudinal direction. 前記心体が複数の補強層を積層した複層構造であり、この複層構造の最外周の補強層が前記コンベヤベルト用繊維補強層である請求項４に記載のコンベヤベルト。   The conveyor belt according to claim 4, wherein the core body has a multilayer structure in which a plurality of reinforcement layers are laminated, and the reinforcement layer on the outermost periphery of the multilayer structure is the fiber reinforcement layer for the conveyor belt.
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