JP4141190B2 - Conveyor belt - Google Patents

Conveyor belt Download PDF

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Publication number
JP4141190B2
JP4141190B2 JP2002189727A JP2002189727A JP4141190B2 JP 4141190 B2 JP4141190 B2 JP 4141190B2 JP 2002189727 A JP2002189727 A JP 2002189727A JP 2002189727 A JP2002189727 A JP 2002189727A JP 4141190 B2 JP4141190 B2 JP 4141190B2
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Japan
Prior art keywords
reinforcing layer
conveyor belt
belt
steel
thickness 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 - Fee Related
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JP2002189727A
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Japanese (ja)
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JP2004026476A (en
Inventor
滋泰 田中
康彦 鈴木
攻 篠原
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
Priority date (The priority date 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 date listed.)
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Priority to JP2002189727A priority Critical patent/JP4141190B2/en
Publication of JP2004026476A publication Critical patent/JP2004026476A/en
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Description

【0001】
【発明の属する技術分野】
本発明は、スチール補強層を埋設したコンベヤベルトに関し、更に詳しくは、高い縦裂き防止効果を発揮するようにしたコンベヤベルトに関する。
【0002】
【従来の技術】
ゴム層内にベルト長手方向に延在するスチールコードをベルト幅方向に所定の間隔で配列したスチール補強層を配置するコンベヤベルトは、表面に損傷を受けた際にベルト長手方向に沿ってゴム層に縦裂きが発生し易い。そこで、その対策として、有機繊維コードを織物にした帆布を縦裂き防止用の補助補強層としてスチール補強層に並設するようにしている。
【0003】
しかしながら、縦裂き防止効果を高めるために帆布の層数を増加すると、コンベヤベルトが硬くなり、その結果、径が小さいプーリー間に掛回して使用する条件下では、補助補強層とゴム層との間で層間剥離が発生し易くなり、コンベヤベルトの寿命が短くならざるを得ない。
【0004】
【発明が解決しようとする課題】
本発明の目的は、コンベヤベルトの寿命を阻害することなく、高い縦裂き防止効果を得ることが可能なコンベヤベルトを提供することにある。
【0005】
【課題を解決するための手段】
上記目的を達成するため、本発明のコンベヤベルトは、ゴム層内にベルト長手方向に延在するスチールコードをベルト幅方向に所定の間隔で配列した1層のスチール補強層を配置すると共に、該スチール補強層の厚さ方向一方側に縦裂き防止用の補助補強層を並設したコンベヤベルトにおいて、前記補助補強層をベルト幅方向に延在する金属コードをベルト長手方向に所定の間隔で配列した1層の金属補強層から構成し、かつ前記補助補強層の厚さ方向一方側面から前記ゴム層の厚さ方向一方側表面までの距離aと、前記補助補強層の厚さ方向他方側面から前記ゴム層の厚さ方向他方側表面までの距離bとの比a/bを0.8〜1.2にしたことを特徴とする。
【0006】
上記構成からなる本発明によれば、補助補強層をベルト幅方向に延在する金属コードをベルト長手方向に所定の間隔で配列した金属補強層から構成することで、高い縦裂き防止効果を確保することが可能になる。
【0007】
また、上記補助補強層を1層配置するだけで高い縦裂き防止効果を得ることが可能になるため、コンベヤベルトが硬くなるのを回避することができる。そのため、径が小さいプーリー間に掛回するような使用条件下であっても、層間剥離が容易に発生することがないので、コンベヤベルトの寿命を長く維持することができる。
【0008】
更に、比a/bを上記のように特定することで、蛇行の原因となるコンベヤベルトの反りを回避することができる。
【0009】
【発明の実施の形態】
以下、本発明の構成について添付の図面を参照しながら詳細に説明する。
【0010】
図1は本発明のコンベヤベルトの一例を示し、このコンベヤベルトCは、ゴム層1内にベルト長手方向Xに沿って延在する複数のスチールコードSをベルト幅方向Wに沿って所定の間隔で配列した1層のスチール補強層2が配置されている。スチール補強層2の厚さ方向一方側(ゴム層1の運搬物を載せる表面側)には、スチール補強層2に並設した縦裂き防止用の補助補強層3が1層埋設してある。
【0011】
補助補強層3は、ベルト幅方向Wに沿って延在する複数のスチールコードMをベルト長手方向Xに沿って所定の間隔で配列した1層の金属補強層から構成されている。
【0012】
補助補強層3の厚さ方向一方側面3aからゴム層1の厚さ方向一方側表面(運搬物を載せる表面)1aまでの距離aと、補助補強層3の厚さ方向他方側面3bからゴム層1の厚さ方向他方側表面(裏面)1bまでの距離bとの比a/bは、0.6〜1.6の範囲になっている。
【0013】
この比a/bが上記範囲外では、コンベヤベルトCの加硫時に、補助補強層3を境にその両側のゴム層1のゴムの収縮力の差により、図2に示すように、コンベヤベルトCにベルト幅方向Wにおいて反りが発生し、コンベヤベルトが蛇行する原因になる。本発明では、比a/bを0.8〜1.2の範囲、望ましくは1にするのがよい。
【0014】
上述した本発明によれば、補助補強層3をベルト幅方向Wに延在するスチールコードMをベルト長手方向Xに所定の間隔で配列した金属補強層から構成するため、高い縦裂き防止効果を得ることができる。
【0015】
しかも、補助補強層3を1層設けるだけで高い縦裂き防止効果を得ることができるため、コンベヤベルトCが硬くなるようなことがなく、従って、径が小さいプーリー間に掛回して使用する環境下であっても、層間剥離の発生を容易に招くことがないので、コンベヤベルトCの寿命が短くなるのを回避することができる。
【0016】
また、比a/bを上述した範囲に特定することで、蛇行の原因となるコンベヤベルトCの反りを招くようなことがない。
【0017】
本発明において、補助補強層3に使用するスチールコードMの径としては、0.68〜1.80mmにするのがよい。径が0.68mmより小さいと、高い縦裂き防止効果を得ることが難しくなる。逆に1.80mmより大きいと、無用な重量の増加を招く。スチールコードMの配列間隔としては、22〜40本/50mmにするのがよい。
【0018】
補助補強層3は、上述したようにスチールコードMからなる金属補強層で構成するのが、コストなどの点から好ましいが、それに代えて、他の金属コードを上記のように配列した金属補強層を使用することもできる。
【0019】
本発明は、上記実施形態では、補助補強層3をスチール補強層2に対してゴム層1の運搬物を載せる表面1a側に設けた例を示したが、スチール補強層2に対してゴム層1の裏面1b側に並設したコンベヤベルトであってもよく、スチール補強層2のいずれか一方側に補助補強層3を配置したコンベヤベルトであればよい。
【0020】
【実施例】
図1に示す構成のコンベヤベルトにおいて、比a/bを表1のように変えたベルト幅1050mm、厚さ20mmの本発明のコンベヤベルト1〜3(実施例1〜3)と比較コンベヤベルト1〜4(比較例1〜4)をそれぞれ作製した。
【0021】
各試験コンベヤベルトの補助補強層には径が1.34mmのスチールコードを使用し、その配列間隔は29本/50mmで共通である。
【0022】
これら各試験コンベヤベルトを以下に示す測定条件により、コンベヤベルトの反りの評価試験を行ったところ、表1に示す結果を得た。
コンベヤベルトの反り
得られた各試験コンベヤベルトの反りの状態を目視により観察し、その結果を◎、○、△、×の段階で評価した。◎は反りが全くなし、○は反りがほとんどなし、△は○のものより反りの発生が認められるが、蛇行原因となる問題を発生するまでには至らない、×は蛇行原因となるような反りが発生したことを意味する。
【0023】
【表1】

Figure 0004141190
表1から、比a/bを0.6〜1.6にしたコンベヤベルトは、蛇行の原因となる反りの発生を回避できることがわかる。また、本発明で規定したように比a/bを0.8〜1.2、望ましくは1にするのがよいことがわかる。
【0024】
【発明の効果】
上述したように本発明は、ゴム層内にベルト長手方向に延在するスチールコードをベルト幅方向に所定の間隔で配列した1層のスチール補強層を配置すると共に、該スチール補強層の厚さ方向一方側に縦裂き防止用の補助補強層を並設したコンベヤベルトにおいて、補助補強層をベルト幅方向に延在する金属コードをベルト長手方向に所定の間隔で配列した1層の金属補強層から構成し、かつ前記補助補強層の厚さ方向一方側面から前記ゴム層の厚さ方向一方側表面までの距離aと、前記補助補強層の厚さ方向他方側面から前記ゴム層の厚さ方向他方側表面までの距離bとの比a/bを上記のように0.8〜1.2に規定することにより、コンベヤベルトの寿命を阻害することなく、高い縦裂き防止効果を得ることができ、またコンベヤベルトが蛇行する原因となる反りの発生を防止することができる。
【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示し、(a)はベルト幅方向要部断面図、(b)はベルト長手方向要部断面図である。
【図2】(a),(b)は、それぞれコンベヤベルトに反りが発生した状態を示すベルト幅方向断面図である。
【符号の説明】
1 ゴム層 1a 一方側表面
1b 他方側表面 2 スチール補強層
3 補助補強層 3a 一方側面
3b 他方側面 C コンベヤベルト
M スチールコード(金属コード) S スチールコード
W ベルト幅方向 X ベルト長手方向[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a conveyor belt in which a steel reinforcing layer is embedded, and more particularly, to a conveyor belt that exhibits a high vertical tear prevention effect.
[0002]
[Prior art]
A conveyor belt in which steel reinforcement layers in which steel cords extending in the longitudinal direction of the belt are arranged at predetermined intervals in the belt width direction is disposed in the rubber layer is a rubber layer along the longitudinal direction of the belt when the surface is damaged. Longitudinal tearing is likely to occur. Therefore, as a countermeasure, canvas made of woven organic fiber cord is juxtaposed with the steel reinforcing layer as an auxiliary reinforcing layer for preventing vertical tearing.
[0003]
However, if the number of canvas layers is increased to increase the effect of preventing longitudinal tearing, the conveyor belt becomes hard, and as a result, under the condition that it is used by being hanged between pulleys having a small diameter, the auxiliary reinforcing layer and the rubber layer Delamination easily occurs between them, and the life of the conveyor belt must be shortened.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a conveyor belt capable of obtaining a high vertical tear prevention effect without impairing the life of the conveyor belt.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a conveyor belt according to the present invention has a steel reinforcing layer in which steel cords extending in the longitudinal direction of a belt are arranged in a rubber layer at predetermined intervals in the belt width direction, In a conveyor belt in which an auxiliary reinforcing layer for preventing vertical tearing is arranged on one side in the thickness direction of the steel reinforcing layer, metal cords extending in the belt width direction are arranged at predetermined intervals in the belt longitudinal direction. A distance a from the one side surface in the thickness direction of the auxiliary reinforcing layer to the one side surface in the thickness direction of the rubber layer, and the other side surface in the thickness direction of the auxiliary reinforcing layer. The ratio a / b to the distance b to the other surface in the thickness direction of the rubber layer is set to 0.8 to 1.2 .
[0006]
According to the present invention having the above-described configuration, the auxiliary reinforcing layer is composed of the metal reinforcing layer in which the metal cords extending in the belt width direction are arranged at predetermined intervals in the belt longitudinal direction, thereby ensuring a high vertical tear prevention effect. It becomes possible to do.
[0007]
Moreover, since it becomes possible to obtain a high vertical tear prevention effect by arranging only one auxiliary reinforcing layer, it is possible to avoid the conveyor belt from becoming hard. For this reason, delamination does not easily occur even under use conditions where the pulley is wound around a pulley having a small diameter, so that the life of the conveyor belt can be maintained long.
[0008]
Furthermore, by specifying the ratio a / b as described above, it is possible to avoid the warp of the conveyor belt that causes meandering.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0010]
FIG. 1 shows an example of a conveyor belt according to the present invention. In this conveyor belt C , a plurality of steel cords S extending along a belt longitudinal direction X in a rubber layer 1 are provided along a belt width direction W. One steel reinforcing layer 2 arranged at intervals is arranged. On one side in the thickness direction of the steel reinforcing layer 2 (the surface side on which the transported material of the rubber layer 1 is placed), one auxiliary reinforcing layer 3 for preventing vertical tearing arranged in parallel with the steel reinforcing layer 2 is embedded.
[0011]
The auxiliary reinforcing layer 3 is composed of a single metal reinforcing layer in which a plurality of steel cords M extending along the belt width direction W are arranged at predetermined intervals along the belt longitudinal direction X.
[0012]
And the distance a from the thickness direction whereas the side surface 3a of the auxiliary reinforcing layer 3 to a thickness direction of one side surface (surface mounting the transported article) 1a of the rubber layer 1, the rubber layer from the other thickness direction side 3b of the auxiliary reinforcing layer 3 The ratio a / b to the distance b to the surface (back surface) 1b on the other side in the thickness direction of 1 is in the range of 0.6 to 1.6.
[0013]
When the ratio a / b is outside the above range, as shown in FIG. 2, the conveyor belt C is vulcanized due to the difference in rubber shrinkage between the rubber layers 1 on both sides of the auxiliary reinforcing layer 3 as shown in FIG. C is warped in the belt width direction W, causing the conveyor belt to meander. In the present invention, the ratio a / b is in the range of 0.8 to 1.2, preferably 1.
[0014]
According to the above-described present invention, the auxiliary reinforcing layer 3 is composed of the metal reinforcing layer in which the steel cords M extending in the belt width direction W are arranged at a predetermined interval in the belt longitudinal direction X. Obtainable.
[0015]
Moreover, since a high longitudinal tear prevention effect can be obtained by providing only one auxiliary reinforcing layer 3, the conveyor belt C does not become hard, and therefore it is used in an environment where the belt is wound around pulleys having a small diameter. Even underneath, the occurrence of delamination does not easily occur, so that the life of the conveyor belt C can be avoided from being shortened.
[0016]
Further, by specifying the ratio a / b within the above-described range, the warp of the conveyor belt C that causes meandering is not caused.
[0017]
In the present invention, the diameter of the steel cord M used for the auxiliary reinforcing layer 3 is preferably 0.68 to 1.80 mm. When the diameter is smaller than 0.68 mm, it is difficult to obtain a high vertical tear preventing effect. On the other hand, if it is larger than 1.80 mm, an unnecessary increase in weight is caused. The arrangement interval of the steel cord M is preferably 22 to 40 pieces / 50 mm.
[0018]
The auxiliary reinforcing layer 3 is preferably composed of the metal reinforcing layer made of the steel cord M as described above from the viewpoint of cost and the like, but instead, the metal reinforcing layer in which other metal cords are arranged as described above. Can also be used.
[0019]
Although the present invention has shown an example in which the auxiliary reinforcing layer 3 is provided on the surface 1a side on which the conveyed material of the rubber layer 1 is placed with respect to the steel reinforcing layer 2 in the above embodiment, the rubber layer with respect to the steel reinforcing layer 2 is shown. 1 may be a conveyor belt arranged side by side on the back surface 1b side, and may be a conveyor belt in which the auxiliary reinforcing layer 3 is arranged on either side of the steel reinforcing layer 2.
[0020]
【Example】
In the conveyor belt of the configuration shown in FIG. 1, the conveyor belts 1 to 3 (Examples 1 to 3 ) of the present invention having a belt width of 1050 mm and a thickness of 20 mm with the ratio a / b changed as shown in Table 1 and the comparative conveyor belt 1 To 4 (Comparative Examples 1 to 4 ) were prepared.
[0021]
A steel cord having a diameter of 1.34 mm is used for the auxiliary reinforcing layer of each test conveyor belt, and the arrangement interval is 29/50 mm.
[0022]
When each of these test conveyor belts was subjected to an evaluation test for warpage of the conveyor belt under the measurement conditions shown below, the results shown in Table 1 were obtained.
The warpage of each test conveyor belt obtained by warping the conveyor belt was visually observed, and the results were evaluated in the stages of ◎, ○, Δ, and ×. ◎ has no warping, ○ has almost no warping, △ has warping more than that of ○, but does not lead to problems that cause meandering, × indicates cause of meandering It means that warping has occurred.
[0023]
[Table 1]
Figure 0004141190
From Table 1, co Nbeyaberuto that the ratio a / b to 0.6 to 1.6 is found to be capable of avoiding occurrence of warpage causing meandering. It can also be seen that the ratio a / b should be 0.8 to 1.2, preferably 1, as specified in the present invention .
[0024]
【The invention's effect】
As described above, according to the present invention, a steel reinforcing layer in which steel cords extending in the longitudinal direction of the belt are arranged at predetermined intervals in the belt width direction is disposed in the rubber layer, and the thickness of the steel reinforcing layer is set. In a conveyor belt in which an auxiliary reinforcing layer for preventing longitudinal tearing is arranged on one side in the direction, a single metal reinforcing layer in which metal cords extending in the belt width direction are arranged at predetermined intervals in the belt longitudinal direction And a distance a from the one side surface in the thickness direction of the auxiliary reinforcing layer to the one side surface in the thickness direction of the rubber layer, and the thickness direction of the rubber layer from the other side surface in the thickness direction of the auxiliary reinforcing layer. By defining the ratio a / b to the distance b to the other side surface to 0.8 to 1.2 as described above, a high longitudinal tear preventing effect can be obtained without impairing the life of the conveyor belt. Can also conveyor belt There it is possible to prevent the occurrence of warpage causing meandering.
[Brief description of the drawings]
1A and 1B show an example of a conveyor belt according to the present invention, in which FIG. 1A is a cross-sectional view of the main part in the belt width direction, and FIG.
FIGS. 2A and 2B are cross-sectional views in the belt width direction showing a state in which the conveyor belt is warped. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rubber layer 1a One side surface 1b The other side surface 2 Steel reinforcement layer 3 Auxiliary reinforcement layer 3a One side surface 3b The other side C Conveyor belt M Steel cord (metal cord) S Steel cord W Belt width direction X Belt longitudinal direction

Claims (3)

ゴム層内にベルト長手方向に延在するスチールコードをベルト幅方向に所定の間隔で配列した1層のスチール補強層を配置すると共に、該スチール補強層の厚さ方向一方側に縦裂き防止用の補助補強層を並設したコンベヤベルトにおいて、前記補助補強層をベルト幅方向に延在する金属コードをベルト長手方向に所定の間隔で配列した1層の金属補強層から構成し、かつ前記補助補強層の厚さ方向一方側面から前記ゴム層の厚さ方向一方側表面までの距離aと、前記補助補強層の厚さ方向他方側面から前記ゴム層の厚さ方向他方側表面までの距離bとの比a/bを0.8〜1.2にしたコンベヤベルト。A steel reinforcing layer in which steel cords extending in the longitudinal direction of the belt are arranged at predetermined intervals in the belt width direction is disposed in the rubber layer, and for preventing vertical tearing on one side in the thickness direction of the steel reinforcing layer. In the conveyor belt in which the auxiliary reinforcing layers are arranged in parallel, the auxiliary reinforcing layer is composed of one metal reinforcing layer in which metal cords extending in the belt width direction are arranged at predetermined intervals in the belt longitudinal direction, and the auxiliary The distance a from the one side surface in the thickness direction of the reinforcing layer to the one surface in the thickness direction of the rubber layer and the distance b from the other side surface in the thickness direction of the auxiliary reinforcing layer to the other surface in the thickness direction of the rubber layer A conveyor belt having a ratio a / b of 0.8 to 1.2 . 前記補助補強層を、スチール補強層に対してゴム層の運搬物を載せる表面側に設けた請求項1に記載のコンベヤベルト。  The conveyor belt according to claim 1, wherein the auxiliary reinforcing layer is provided on a surface side on which a conveyed material of the rubber layer is placed with respect to the steel reinforcing layer. 前記金属コードが、外径0.68mm〜1.80mmのスチールコードであり、その配列間隔が22本〜40本/50mmである請求項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, wherein the metal cord is a steel cord having an outer diameter of 0.68 mm to 1.80 mm, and an arrangement interval thereof is 22 to 40/50 mm.
JP2002189727A 2002-06-28 2002-06-28 Conveyor belt Expired - Fee Related JP4141190B2 (en)

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