WO2010010824A1 - Conveyor belt and recapping method for conveyor belt - Google Patents

Conveyor belt and recapping method for conveyor belt Download PDF

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Publication number
WO2010010824A1
WO2010010824A1 PCT/JP2009/062632 JP2009062632W WO2010010824A1 WO 2010010824 A1 WO2010010824 A1 WO 2010010824A1 JP 2009062632 W JP2009062632 W JP 2009062632W WO 2010010824 A1 WO2010010824 A1 WO 2010010824A1
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Prior art keywords
conveyor belt
rubber
cover rubber
layer
fiber
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PCT/JP2009/062632
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French (fr)
Japanese (ja)
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登 関根
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株式会社ブリヂストン
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Publication of WO2010010824A1 publication Critical patent/WO2010010824A1/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
    • B65G15/36—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric the layers incorporating ropes, chains, or rolled steel sections
    • 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

Definitions

  • the present invention relates to a conveyor belt including a main body belt in which a steel cord is embedded as a reinforcing core and a cover rubber disposed on at least a conveying surface side of the main body belt.
  • the present invention also relates to a method for recapping a conveyor belt comprising a main body belt in which a steel cord is embedded as a reinforcing core, and a cover rubber disposed on at least a conveying surface side of the main body belt.
  • Conveyor belts are no exception. Conveyor belts have different service life for each part, so it is possible to recap cover rubber that has a shorter service life than other parts such as body belts with reinforcing cores. The service life is extended. This cover rubber recapping is carried out by removing only the worn or damaged cover rubber and then reapplying and vulcanizing a new unvulcanized cover rubber.
  • the thickness of the cover rubber portion 109 after use is non-uniform due to wear or the like, so that the canvas 101 is removed from the belt main body portion.
  • the cover rubber part 109 is peeled off so as to remain in 105, there is a problem that the cover rubber part 109 is cut off at the thinned part and cannot be removed efficiently.
  • the cover rubber part 109 is peeled off, a sufficient amount of rubber cannot be left on the canvas 101, and the adhesion with the new cover rubber part 109 becomes insufficient or non-uniform. There is a fear.
  • the cover rubber part 109 when the cover rubber part 109 is peeled off together with the canvas 101 in order to avoid such a torn problem, the surface of the belt main body part 105 becomes uneven as shown in FIG. There is a problem that the surface to be applied before 109 has to be buffed smoothly. Further, when the cover rubber portion 109 is peeled off, the steel cord 103 may be exposed. In this case, the steel cord 103 may be damaged by the buffing process.
  • the object of the present invention is to solve these problems.
  • the purpose of the present invention is to make the surface of the main body belt uneven or expose the steel cord when the cover rubber after use is recapped. It is an object of the present invention to provide a conveyor belt and a recapping method that can efficiently peel off a cover rubber without causing a trouble.
  • the present invention provides a conveyor belt comprising a main body belt in which a steel cord is embedded as a reinforcing core, and a cover rubber disposed at least on the conveying surface side of the main body belt. It is a conveyor belt characterized in that at least two fiber layers and at least one rubber layer are alternately laminated inside.
  • the cover rubber can be peeled off together with the fiber layer, time and labor can be saved significantly compared to the case where the cover rubber is removed by buffing, and the skill can be reduced. There is no need for work. Further, since the cover rubber is peeled off together with the fiber layer, the cover rubber is not broken off in the middle and can be peeled off efficiently. Furthermore, since the rubber layer between the two fiber layers is torn and the cover rubber is removed, a sufficient amount of rubber can be left on the fiber layer to ensure sufficient and uniform adhesion with the new cover rubber. In addition, the tear surface is not uneven enough to require repair, and the steel cord is not exposed.
  • the fiber layer is preferably composed of canvas.
  • canvas refers to a woven fabric formed by weaving fibers.
  • At least the fiber layer located closest to the conveying surface among the at least two fiber layers is divided into a plurality in the longitudinal direction of the conveyor belt.
  • the fiber layer located on the most transport side among the at least two fiber layers is divided into a plurality of parts in the width direction of the conveyor belt.
  • At least the fiber layer located closest to the conveying surface among the at least two fiber layers extends over the entire width of the conveyor belt.
  • the conveyor belt according to the present invention at least three fiber layers and at least two rubber layers are alternately laminated in the cover rubber, and the tear strength of the rubber layer is set to be lower toward the conveying surface side. It is preferable.
  • the rubber layer includes two high tear rubber members disposed adjacent to the fiber layer and having a relatively high tear strength, and the high tear rubber disposed between the high tear rubber members. It is preferable to comprise a low tear rubber member having a tear strength lower than that of the member.
  • the present invention provides a main body belt in which a steel cord is embedded as a reinforcing core, a cover rubber disposed at least on the conveying surface side of the main body belt, and disposed in the cover rubber.
  • the conveyor belt recapping method of the present invention preferably includes a step of disposing a fiber layer for forming a rubber layer again between the fiber layer remaining in the remaining portion of the conveyor belt.
  • the cover rubber for recapping when the cover rubber for recapping is bonded to the remaining portion of the conveyor belt, at least a fiber layer that forms a rubber layer again with the fiber layer remaining in the remaining portion is provided. It is preferable to attach a recapping cover rubber having one layer.
  • FIG. 1 is a cross-sectional view in the width direction of a conveyor belt according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view similar to FIG. 1, illustrating a method for recapping the cover rubber of the conveyor belt shown in FIG.
  • FIG. 3 is a cross-sectional view along the longitudinal direction of a conveyor belt according to another embodiment of the present invention.
  • FIG. 4 is a cross-sectional view along the width direction of a conveyor belt according to still another embodiment of the present invention.
  • FIG. 5 is a sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention.
  • FIG. 6 is a sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention.
  • FIG. 1 is a cross-sectional view in the width direction of a conveyor belt according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view similar to FIG. 1, illustrating a method for recapping the cover rubber of the conveyor
  • FIG. 7 is a view showing a conveyor belt according to still another embodiment of the present invention, in which (a) is a cross-sectional view along the width direction, and (b) is an enlarged cross-sectional view along the width direction.
  • FIG. 8 is a cross-sectional view in the width direction of the conveyor belt, showing the method for recapping the conveyor belt according to the present invention.
  • FIG. 9 is a cross-sectional view in the width direction of a recapping cover rubber that can be suitably applied to the present invention.
  • 10 (a) and 10 (b) are cross-sectional views along the width direction of the conveyor belt according to the prior art.
  • FIG. 1 is a cross-sectional view of a conveyor belt according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view similar to FIG. 1, illustrating a method for recapping the cover rubber of the conveyor belt shown in FIG. is there.
  • the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5. Is provided.
  • the cover rubber 9 may be provided not only on the conveying surface 7 side but also on the opposite side to the conveying surface 7.
  • first and second two fiber layers 11a and 11b (here, the fiber layer on the conveying surface 7 side is the first fiber layer 11a, and the fiber layer on the steel cord side is the first fiber layer 11a). 2 and the rubber layer 13 are alternately stacked, and thus the rubber layer 13 is formed between the fiber layers 11a and 11b.
  • the first and second fiber layers 11a and 11b can be composed of, for example, a woven fabric (canvas), a knitted fabric, a non-woven fabric, or the like.
  • natural fibers such as cotton and hemp
  • inorganic fibers such as metal fibers and glass fibers
  • organic fibers such as polyamide, polyester, polyethylene, polyurethane, polystyrene, polyfluoroethylene, polyacryl, polyvinyl alcohol, wholly aromatic polyester, and aramid.
  • the conveyor belt 1 is bent by a pulley (not shown) of the conveyor body with the steel cord 3 as a reinforcing core as a neutral shaft, it is preferable to use a stretchable fiber layer.
  • the fiber layers 11a and 11b are made of woven fabric or knitted fabric, nylon is used to improve stretchability, the weaving structure and the warp / weft density are devised, or the fibers in the longitudinal direction of the conveyor belt 1 are used. Or an inclined bias structure.
  • the fiber layer 11a is made of canvas, it becomes easy to peel off due to its flexibility when part of the cover rubber 9 is peeled off together with the first fiber layer 11a with a winch or the like as will be described later. Therefore, there is no possibility that the fiber layer 11a is cut off in the middle.
  • first and second fiber layers 11a and 11b may be made of the same material or different materials.
  • the bending at the pulley while the conveyor belt 1 goes around the conveyor body is more in the case where the steel cord 3 is on the inner peripheral side and the fiber layers 11a and 11b are on the outer peripheral side than in the opposite case. Since there are many, the fiber layer farther from the steel cord 3 can be made a material that is more resistant to fatigue due to expansion and contraction.
  • FIG. 2 (a) a cut X reaching the rubber layer 13 formed between the first and second fiber layers 11 a and 11 b is made, for example, along the longitudinal direction of the conveyor belt 1. And the part 15 pinched
  • FIG. 2 (c) an unvulcanized cover rubber 19 for recapping is pasted on the remaining portion 17 (recessed portion) of the conveyor belt 1 remaining after the cover rubber 9 is peeled off. Then vulcanize.
  • the cover rubber 9 since part of the cover rubber 9 can be peeled off together with the first fiber layer 11a, time and labor can be saved significantly compared to the case where the cover rubber 9 is removed by buffing, Also, no skill-intensive work is required. Further, since the cover rubber 9 is peeled off together with the first fiber layer 11a, the cover rubber 9 is not broken off in the middle and can be peeled off efficiently. Furthermore, since the rubber layer 13 between the two fiber layers 11a and 11b is torn and the cover rubber 9 is removed, a sufficient amount of rubber is left on the surface of the remaining fiber layer 11b, and a new cover rubber 9 and Sufficient and uniform adhesion can be ensured, and the tear surface does not become uneven enough to require repair, and the steel cord 3 is not exposed.
  • FIG. 3 is a sectional view along the longitudinal direction of a conveyor belt according to another embodiment of the present invention.
  • the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5.
  • First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b.
  • the 1st fiber layer 11a is divided
  • FIG. 4 is a cross-sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention.
  • the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5.
  • First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b.
  • the 1st fiber layer 11a is divided
  • the conveyor belt 1 of this embodiment when local damage d (see FIG. 4 (a)) or the like occurs in the cover rubber 9, it is partially necessary as shown in FIG. 4 (b). Since the cover rubber 9 can be peeled off, it is possible to further improve the efficiency of recapping. It goes without saying that the efficiency of recapping can be further increased by dividing the first fiber layer 11a into a plurality of portions in the longitudinal direction and the width direction.
  • FIG. 5 is a sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention.
  • the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5.
  • First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b.
  • the first and second fiber layers 11 a and 11 b extend the entire width of the conveyor belt 1.
  • FIG. 6 is a cross-sectional view along the width direction of the conveyor belt 1 according to still another embodiment of the present invention.
  • the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5. Is provided.
  • a third fiber layer 11c is embedded in the cover rubber 9 in addition to the first and second fiber layers 11a and 11b from the conveying surface 7 side, and two layers are provided between these fiber layers 11a, 11b and 11c. Rubber layers 13a and 13b are formed.
  • a part of the cover rubber 9 is peeled off together with the first fiber layer 11a, and even if the cover rubber 9 is recapped, the second and third fiber layers 11b and 11c are covered with the cover rubber. 9 can be left in place, so the recapping can be performed twice. As the number of fiber layers forming the rubber layer increases, the number of recaps that can be performed increases. Therefore, if four or more fiber layers and three or more rubber layers are alternately stacked, the number of recaps can be increased. An increase can be aimed at.
  • the tear strength of the rubber layers 13a and 13b formed between the fiber layers 11a, 11b, and 11c is set to be lower toward the conveyance surface 7 side. In this way, when performing recapping over a plurality of times, the rubber layer 13a closer to the conveying surface 7 side can be reliably (priorly) torn, and the other side closer to the steel cord 3 can be mistaken. There is no risk of tearing the rubber layer 13b.
  • FIG. 7A is a sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention
  • FIG. 7B is an enlarged sectional view of the conveyor belt of FIG. 7A.
  • the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5. Is provided. First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b.
  • the rubber layer 13 includes the high tear rubber members 21 and 21 that are disposed adjacent to the first and second fiber layers 11a and 11b and have a relatively high tear strength, that is, are difficult to tear. It has the low tear rubber member 23 which is arrange
  • the difference in tear strength between the high tear rubber members 21 and 21 and the low tear rubber member 23 measured according to JIS K6301B type is preferably 30 N / mm or less in consideration of the durability performance of the conveyor belt 1 and will be described later. From the viewpoint of surely causing such preferential tearing of the low tear rubber member 23, it is preferably 5 N / mm or more.
  • the tear strength of the high tear rubber members 21 and 21 may be increased, or the low tear rubber member 23 may be increased.
  • an inorganic filler such as calcium carbonate is blended in the rubber member, or in the case of blending NR / SBR Brent, the SBR ratio Can be raised.
  • the low tear rubber member 23 when part of the cover rubber 9 is peeled off together with the first fiber layer 11a, the low tear rubber member 23 is preferentially torn, and the first remaining on the cover belt 9 is removed.
  • a rubber material high tear rubber member 21
  • the cover rubber 19 for recapping and A high adhesive force can be ensured between the fiber layer 11b.
  • the low tear rubber member 23 can be preferentially torn, the tear surface can be smoothed. From this point of view, the thickness of the low tear rubber member 23 is set to be higher than that of the high tear rubber members 21, 21. If the thickness is smaller than the thickness, the unevenness of the tear surface caused by tearing can be made smaller.
  • FIG. 8 is a cross-sectional view in the width direction of the conveyor belt, showing the conveyor belt recapping method according to the present invention.
  • the conveyor belt 1 of this embodiment is disposed on a main body belt 5 in which a steel cord 3 as a reinforcing core is embedded, and on the conveying surface 7 side of the main body belt 5.
  • Cover rubber 9 is provided.
  • First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b.
  • FIG. 8 (b) a part of the cover rubber 9 which has been worn away by use is peeled off together with the first fiber layer 11a.
  • recapping is performed by bonding the recapping cover rubber 19 to the remaining portion 17 of the conveyor belt 1, but in this example, before the recapping cover rubber 19 is bonded, FIG.
  • a new fiber layer 11d for re-forming the rubber layer 13 is disposed between the second fiber layer 11b remaining on the remaining portion 17 of the conveyor belt 1 and the second fiber layer 11b.
  • the cover rubber 19 can be attached after the fiber layer 11d as a single body is disposed on the remaining portion 17 of the conveyor belt 1 as shown in FIG.
  • a new fiber layer 11d is previously disposed in the cover rubber 19 like the recapping cover rubber 19 shown in FIG.
  • the rubber layer 13 may be newly formed between the fiber layer 11b and the fiber layer 11b.
  • the cover rubber having at least two fiber layers and at least one rubber layer can be provided on the surface opposite to the conveying surface. 3 and 4, the fiber layer closest to the conveying surface has a split structure, but the fiber layer on the steel cord side can also have a split structure. In particular, this is advantageous in the case where three or more fiber layers and two or more rubber layers are alternately laminated to enable recapping twice or more.
  • the cover rubber after use is recapped, the cover rubber is efficiently removed without the surface of the main body belt becoming uneven or exposing the steel cord. It can be peeled off.

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  • Mechanical Engineering (AREA)
  • Belt Conveyors (AREA)

Abstract

Provided are a conveyor belt which allows, in recapping of cover rubber after use, the cover rubber to be easily removed without making the surface of a body belt uneven and without exposing steel cords, and a recapping method. A conveyor belt (1) is provided with a body belt (5) in which steel cords (3) as reinforcing cores are embedded, and also with cover rubber (9) provided at least on the conveying surface (7) side of the body belt (5).  At least two fiber layers (11a, 11b) and at lest one rubber layer (13) are alternately overlaid on each other in the cover rubber (9).

Description

コンベアベルト及びコンベアベルトのリキャップ方法Conveyor belt and conveyor belt recap method
　この発明は、補強芯体としてスチールコードが埋設された本体ベルトと、該本体ベルトの少なくとも搬送面側に配置されたカバーゴムとを備えるコンベアベルトに関するものである。また、この発明は、補強芯体としてスチールコードが埋設された本体ベルトと、該本体ベルトの少なくとも搬送面側に配置されたカバーゴムとを備えるコンベアベルトのリキャップ方法に関する。 The present invention relates to a conveyor belt including a main body belt in which a steel cord is embedded as a reinforcing core and a cover rubber disposed on at least a conveying surface side of the main body belt. The present invention also relates to a method for recapping a conveyor belt comprising a main body belt in which a steel cord is embedded as a reinforcing core, and a cover rubber disposed on at least a conveying surface side of the main body belt.
　近年、環境問題、省資源化の観点から製品の使用寿命の長期化が強く求められている。コンベアベルトに関しても例外ではなく、コンベアベルトは、その各部位ごとに使用寿命が異なることから、補強芯体を有する本体ベルト等の他の部位に比べて使用寿命の短いカバーゴムをリキャップすることにより使用寿命の長期化が図られている。このカバーゴムのリキャップは、摩耗や損傷したカバーゴムのみを除去した後に新しい未加硫カバーゴムを貼りなおし加硫することによって行われる。 In recent years, there has been a strong demand for extending the service life of products from the viewpoint of environmental problems and resource saving. Conveyor belts are no exception. Conveyor belts have different service life for each part, so it is possible to recap cover rubber that has a shorter service life than other parts such as body belts with reinforcing cores. The service life is extended. This cover rubber recapping is carried out by removing only the worn or damaged cover rubber and then reapplying and vulcanizing a new unvulcanized cover rubber.
　ところで、カバーゴムをリキャップするためには、摩耗等したカバーゴムを取り除く作業が必要であるが、従来、カバーゴムの除去は、バフ処理によって行うのが主流であった。このバフ処理は、カバーゴムの摩耗や損傷状態に応じて手作業で行なわれるため、多大な時間と労力を必要とし、また補強芯体を傷つけずに除去面を平滑に仕上げるために熟練した作業を必要とする。 Incidentally, in order to recapped the cover rubber, it is necessary to remove the worn cover rubber, but conventionally, the cover rubber has been mainly removed by buffing. This buffing is done manually according to the wear and damage state of the cover rubber, so it takes a lot of time and labor, and it is a skilled work to finish the removal surface smoothly without damaging the reinforcing core. Need.
　これに対し、特許文献１には、図１０（ａ）に示すように、カバーゴム部１０９とスチールコード１０３を有するベルト本体部１０５との境界に帆布１０１を配設することによりこれらのカバーゴム部１０９とベルト本体部１０５との間の結合力を弱化させ、カバーゴム部１０９の容易な引き剥がしを可能とする技術が開示されている。 On the other hand, in Patent Document 1, as shown in FIG. 10A, these cover rubbers are provided by arranging a canvas 101 at the boundary between the cover rubber part 109 and the belt main body part 105 having the steel cord 103. A technique that weakens the coupling force between the portion 109 and the belt main body portion 105 and enables the cover rubber portion 109 to be easily peeled off is disclosed.
実開平２－６４５０８号公報Japanese Utility Model Publication No. 2-64508
　しかしながら、特許文献１に開示されたコンベアベルトでは、図示のように、使用後のカバーゴム部１０９の厚さが摩耗等によって不均一となっていることに起因して、帆布１０１をベルト本体部１０５に残留させるようにしてカバーゴム部１０９を剥いだ場合、薄くなった部分でカバーゴム部１０９が千切れてしまい、効率よく剥ぐことができないという問題がある。また、カバーゴム部１０９を剥いだ際に、帆布１０１上に十分な量のゴムを残留させることができず、新しいカバーゴム部１０９との接着性が不十分となったり不均一となったりするおそれがある。 However, in the conveyor belt disclosed in Patent Document 1, as shown in the figure, the thickness of the cover rubber portion 109 after use is non-uniform due to wear or the like, so that the canvas 101 is removed from the belt main body portion. When the cover rubber part 109 is peeled off so as to remain in 105, there is a problem that the cover rubber part 109 is cut off at the thinned part and cannot be removed efficiently. Further, when the cover rubber part 109 is peeled off, a sufficient amount of rubber cannot be left on the canvas 101, and the adhesion with the new cover rubber part 109 becomes insufficient or non-uniform. There is a fear.
　また、このような千切れの問題を回避すべく、カバーゴム部１０９を帆布１０１とともに剥いだ場合、図１０（ｂ）に示すように、ベルト本体部１０５の表面が凸凹となり、新しいカバーゴム部１０９を貼り付けるのに先立ちかかる表面を平滑にバフ処理しなければならないという問題がある。さらに、カバーゴム部１０９を剥いだ際にスチールコード１０３が露出する場合があり、この場合バフ処理でスチールコード１０３を傷めるおそれがある。 Further, when the cover rubber part 109 is peeled off together with the canvas 101 in order to avoid such a torn problem, the surface of the belt main body part 105 becomes uneven as shown in FIG. There is a problem that the surface to be applied before 109 has to be buffed smoothly. Further, when the cover rubber portion 109 is peeled off, the steel cord 103 may be exposed. In this case, the steel cord 103 may be damaged by the buffing process.
　それゆえこの発明は、これらの問題点を解決することを課題とするものであり、その目的は、使用後のカバーゴムをリキャップする際に、本体ベルトの表面を凸凹にしたりスチールコードを露出させたりすることなく効率よくカバーゴムを剥すことが可能なコンベアベルト及びリキャップ方法を提供することにある。 Therefore, the object of the present invention is to solve these problems. The purpose of the present invention is to make the surface of the main body belt uneven or expose the steel cord when the cover rubber after use is recapped. It is an object of the present invention to provide a conveyor belt and a recapping method that can efficiently peel off a cover rubber without causing a trouble.
　前記の目的を達成するため、この発明は、補強芯体としてスチールコードが埋設された本体ベルトと、該本体ベルトの少なくとも搬送面側に配置されたカバーゴムとを備えるコンベアベルトにおいて、前記カバーゴム内に少なくとも２層の繊維層と少なくとも１層のゴム層とを交互に積層配置したことを特徴とするコンベアベルトである。 In order to achieve the above object, the present invention provides a conveyor belt comprising a main body belt in which a steel cord is embedded as a reinforcing core, and a cover rubber disposed at least on the conveying surface side of the main body belt. It is a conveyor belt characterized in that at least two fiber layers and at least one rubber layer are alternately laminated inside.
　かかるコンベアベルトにあっては、カバーゴム内に配置された少なくとも２層の繊維層の間にゴム層が形成されていることから、スチールコードに近い方の繊維層を残しつつカバーゴムを搬送面側の繊維層とともに剥ぐことでゴム層が引き裂け、カバーゴムは除去される。 In such a conveyor belt, since the rubber layer is formed between at least two fiber layers arranged in the cover rubber, the cover rubber is transported while leaving the fiber layer closer to the steel cord. The rubber layer is torn by peeling together with the side fiber layer, and the cover rubber is removed.
　従って、この発明のコンベアベルトによれば、カバーゴムを繊維層とともに一気に剥ぐことができるので、バフ処理によりカバーゴムを除去した場合に比べ大幅に時間と労力を節約することができ、また熟練を要する作業も必要とならない。また、繊維層とともにカバーゴムを剥ぐことから途中でカバーゴムが千切れることがなく効率よく剥ぐことができる。さらに、２層の繊維層間のゴム層を引き裂いてカバーゴムを除去することから、繊維層上に十分な量のゴムを残留させて新しいカバーゴムとの十分かつ均一な接着性を確保することができ、また、補修が必要となるほど引裂面が凸凹になることがなく、スチールコードが露出するおそれもない。 Therefore, according to the conveyor belt of the present invention, since the cover rubber can be peeled off together with the fiber layer, time and labor can be saved significantly compared to the case where the cover rubber is removed by buffing, and the skill can be reduced. There is no need for work. Further, since the cover rubber is peeled off together with the fiber layer, the cover rubber is not broken off in the middle and can be peeled off efficiently. Furthermore, since the rubber layer between the two fiber layers is torn and the cover rubber is removed, a sufficient amount of rubber can be left on the fiber layer to ensure sufficient and uniform adhesion with the new cover rubber. In addition, the tear surface is not uneven enough to require repair, and the steel cord is not exposed.
　ところで、この発明のコンベアベルトにおいて、繊維層は、帆布で構成することが好ましい。ここで「帆布」とは、繊維と繊維とを織ってなる織物を指すものとする。 By the way, in the conveyor belt of the present invention, the fiber layer is preferably composed of canvas. Here, “canvas” refers to a woven fabric formed by weaving fibers.
　また、この発明のコンベアベルトにおいて、少なくとも２層の繊維層のうち少なくとも最も搬送面側に位置する繊維層は、コンベアベルトの長手方向に複数に分割されていることが好ましい。 Further, in the conveyor belt of the present invention, it is preferable that at least the fiber layer located closest to the conveying surface among the at least two fiber layers is divided into a plurality in the longitudinal direction of the conveyor belt.
　さらに、この発明のコンベアベルトにおいて、少なくとも２層の繊維層のうち少なくとも最も搬送面側に位置する繊維層は、コンベアベルトの幅方向に複数に分割されていることが好ましい。 Furthermore, in the conveyor belt of the present invention, it is preferable that at least the fiber layer located on the most transport side among the at least two fiber layers is divided into a plurality of parts in the width direction of the conveyor belt.
　さらに、この発明のコンベアベルトにおいて、少なくとも２層の繊維層のうち少なくとも最も搬送面側に位置する繊維層は、コンベアベルトの全幅に延びることが好ましい。 Furthermore, in the conveyor belt according to the present invention, it is preferable that at least the fiber layer located closest to the conveying surface among the at least two fiber layers extends over the entire width of the conveyor belt.
　さらに、この発明のコンベアベルトにおいて、カバーゴム内に少なくとも３層の繊維層と少なくとも２層のゴム層とが交互に積層配置され、該ゴム層の引裂強度は、搬送面側程低く設定されることが好ましい。 Furthermore, in the conveyor belt according to the present invention, at least three fiber layers and at least two rubber layers are alternately laminated in the cover rubber, and the tear strength of the rubber layer is set to be lower toward the conveying surface side. It is preferable.
　また、この発明のコンベアベルトにおいて、ゴム層は、繊維層に隣接して配置された比較的引裂強度が高い２つの高引裂ゴム部材と、これら高引裂ゴム部材間に配置された該高引裂ゴム部材よりも引裂強度が低い低引裂ゴム部材とから構成することが好ましい。 In the conveyor belt of the present invention, the rubber layer includes two high tear rubber members disposed adjacent to the fiber layer and having a relatively high tear strength, and the high tear rubber disposed between the high tear rubber members. It is preferable to comprise a low tear rubber member having a tear strength lower than that of the member.
　また、前記の目的を達成するため、この発明は、補強芯体としてスチールコードが埋設された本体ベルトと、該本体ベルトの少なくとも搬送面側に配置されたカバーゴムと、該カバーゴム内に配置された少なくとも２層の繊維層によってこれら繊維層間に形成されたゴム層とを備えるコンベアベルトのカバーゴムをリキャップするにあたり、前記２層の繊維層間のゴム層を引き裂き、該繊維層のうち前記スチールコードに近い一方の繊維層をコンベアベルトに残留させつつ他方の繊維層を前記カバーゴムの少なくとも一部とともに剥ぎ取る工程と、前記カバーゴムの少なくとも一部が剥ぎ取られて前記コンベアベルトに残留したコンベアベルトの残余部分に、リキャップ用のカバーゴムを貼り合わせる工程と、を含むことを特徴とするコンベアベルトのリキャップ方法である。 In order to achieve the above object, the present invention provides a main body belt in which a steel cord is embedded as a reinforcing core, a cover rubber disposed at least on the conveying surface side of the main body belt, and disposed in the cover rubber. When the cover rubber of the conveyor belt provided with the rubber layer formed between the fiber layers by the at least two fiber layers formed is recapted, the rubber layer between the two fiber layers is torn, and the steel layer of the fiber layers A step of peeling off the other fiber layer together with at least a part of the cover rubber while leaving one fiber layer close to the cord on the conveyor belt, and at least a part of the cover rubber was peeled off and remained on the conveyor belt And a step of attaching a cover rubber for recapping to the remaining portion of the conveyor belt. It is a recap method of Aberuto.
　そして、この発明のコンベアベルトのリキャップ方法においては、コンベアベルトの残余部分に残った繊維層との間にゴム層を再度形成する繊維層を配設する工程を含むことが好ましい。 The conveyor belt recapping method of the present invention preferably includes a step of disposing a fiber layer for forming a rubber layer again between the fiber layer remaining in the remaining portion of the conveyor belt.
　また、この発明のコンベアベルトのリキャップ方法において、コンベアベルトの残余部分にリキャップ用のカバーゴムを貼り合わせるにあたり、該残余部分に残った繊維層との間にゴム層を再度形成する繊維層を少なくとも１層有するリキャップ用のカバーゴムを貼り合わせることが好ましい。 Further, in the method for recapping a conveyor belt according to the present invention, when the cover rubber for recapping is bonded to the remaining portion of the conveyor belt, at least a fiber layer that forms a rubber layer again with the fiber layer remaining in the remaining portion is provided. It is preferable to attach a recapping cover rubber having one layer.
　この発明によれば、使用後のカバーゴムをリキャップする際に、本体ベルトの表面が凸凹となったりスチールコードが露出したりすることなく効率よくカバーゴムを剥すことが可能である。 According to this invention, when the cover rubber after use is recapped, it is possible to efficiently peel the cover rubber without the surface of the main body belt becoming uneven or exposing the steel cord.
図１は、この発明の一実施形態のコンベアベルトの幅方向断面図である。FIG. 1 is a cross-sectional view in the width direction of a conveyor belt according to an embodiment of the present invention. 図２は、図１に示すコンベアベルトのカバーゴムのリキャップ方法を説明する、図１と同様の断面図である。FIG. 2 is a cross-sectional view similar to FIG. 1, illustrating a method for recapping the cover rubber of the conveyor belt shown in FIG. 図３は、この発明の他の実施形態のコンベアベルトの長手方向に沿う断面図である。FIG. 3 is a cross-sectional view along the longitudinal direction of a conveyor belt according to another embodiment of the present invention. 図４は、この発明のさらに他の実施形態のコンベアベルトの幅方向に沿う断面図である。FIG. 4 is a cross-sectional view along the width direction of a conveyor belt according to still another embodiment of the present invention. 図５は、この発明のさらに他の実施形態のコンベアベルトの幅方向に沿う断面図である。FIG. 5 is a sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention. 図６は、この発明のさらに他の実施形態のコンベアベルトの幅方向に沿う断面図である。FIG. 6 is a sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention. 図７は、この発明のさらに他の実施形態のコンベアベルトを示す図であり、（ａ）は、幅方向に沿う断面図であり、（ｂ）は、幅方向に沿う拡大断面図である。FIG. 7 is a view showing a conveyor belt according to still another embodiment of the present invention, in which (a) is a cross-sectional view along the width direction, and (b) is an enlarged cross-sectional view along the width direction. 図８は、この発明に従うコンベアベルトのリキャップ方法を示す、コンベアベルトの幅方向断面図である。FIG. 8 is a cross-sectional view in the width direction of the conveyor belt, showing the method for recapping the conveyor belt according to the present invention. 図９は、この発明に好適に適用可能なリキャップ用のカバーゴムの幅方向断面図である。FIG. 9 is a cross-sectional view in the width direction of a recapping cover rubber that can be suitably applied to the present invention. 図１０（ａ）、（ｂ）はそれぞれ、従来技術に従うコンベアベルトの幅方向に沿う断面図である。10 (a) and 10 (b) are cross-sectional views along the width direction of the conveyor belt according to the prior art.
　以下、この発明に従う実施形態について図面を参照しつつ詳細に説明する。ここに、図１は、この発明の一実施形態のコンベアベルトの断面図であり、図２は、図１に示すコンベアベルトのカバーゴムのリキャップ方法を説明する、図１と同様の断面図である。 Hereinafter, an embodiment according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a conveyor belt according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view similar to FIG. 1, illustrating a method for recapping the cover rubber of the conveyor belt shown in FIG. is there.
　図１に示すように、この実施形態のコンベアベルト１は、補強芯体としてのスチールコード３が埋設された本体ベルト５と、この本体ベルト５の搬送面７側に配置されたカバーゴム９とを備える。カバーゴム９は、搬送面７側のみならず搬送面７とは反対側にも設けても良い。 As shown in FIG. 1, the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5. Is provided. The cover rubber 9 may be provided not only on the conveying surface 7 side but also on the opposite side to the conveying surface 7.
　また、カバーゴム９内には第１及び第２の２層の繊維層１１ａ、１１ｂ（ここでは、搬送面７側の繊維層を第１の繊維層１１ａとし、スチールコード側の繊維層を第２の繊維層１１ｂとする。）とゴム層１３とが交互に積層配置され、よってこれらの繊維層１１ａ、１１ｂ間にはゴム層１３が形成されている。第１及び第２の繊維層１１ａ、１１ｂは、例えば、繊維を織った織物（帆布）や、編物、不織布等で構成することができ、繊維素材としては、綿、麻等の天然繊維や、金属繊維、ガラス繊維等の無機繊維、そしてポリアミド、ポリエステル、ポリエチレン、ポリウレタン、ポリスチレン、ポリフロルエチレン、ポリアクリル、ポリビニルアルコール、全芳香族ポリエステル、アラミド等の有機繊維が挙げられる。ただし、コンベアベルト１は補強芯体としてのスチールコード３を中立軸としてコンベア機体のプーリ（図示省略）で屈曲を受けるため、伸縮性のある繊維層とすることが好ましい。よって、繊維層１１ａ、１１ｂを織物や編物から構成する場合には、伸縮性を高めるためにナイロンを使用したり、製織構造や縦糸・横糸密度を工夫したり、コンベアベルト１の長手方向に繊維を傾斜させたバイアス構造にしたりすることができる。なお、繊維層１１ａを帆布で構成した場合は、後述するようにウインチ等でカバーゴム９の一部を第１の繊維層１１ａとともに引き剥がす際に、その柔軟性により剥し易くなり、また破断強さが安定しているので途中で繊維層１１ａが千切れるおそれがない。 In the cover rubber 9, first and second two fiber layers 11a and 11b (here, the fiber layer on the conveying surface 7 side is the first fiber layer 11a, and the fiber layer on the steel cord side is the first fiber layer 11a). 2 and the rubber layer 13 are alternately stacked, and thus the rubber layer 13 is formed between the fiber layers 11a and 11b. The first and second fiber layers 11a and 11b can be composed of, for example, a woven fabric (canvas), a knitted fabric, a non-woven fabric, or the like. As the fiber material, natural fibers such as cotton and hemp, Examples thereof include inorganic fibers such as metal fibers and glass fibers, and organic fibers such as polyamide, polyester, polyethylene, polyurethane, polystyrene, polyfluoroethylene, polyacryl, polyvinyl alcohol, wholly aromatic polyester, and aramid. However, since the conveyor belt 1 is bent by a pulley (not shown) of the conveyor body with the steel cord 3 as a reinforcing core as a neutral shaft, it is preferable to use a stretchable fiber layer. Therefore, when the fiber layers 11a and 11b are made of woven fabric or knitted fabric, nylon is used to improve stretchability, the weaving structure and the warp / weft density are devised, or the fibers in the longitudinal direction of the conveyor belt 1 are used. Or an inclined bias structure. When the fiber layer 11a is made of canvas, it becomes easy to peel off due to its flexibility when part of the cover rubber 9 is peeled off together with the first fiber layer 11a with a winch or the like as will be described later. Therefore, there is no possibility that the fiber layer 11a is cut off in the middle.
　また、第１及び第２の繊維層１１ａ、１１ｂは同一材料でも良いし異材料でも良い。異材料とする例として、コンベアベルト１がコンベア機体を一周回る間のプーリでの屈曲は、スチールコード３が内周側、繊維層１１ａ、１１ｂが外周側となる場合がその逆の場合よりも多いので、スチールコード３から離れた繊維層程伸縮による疲労に対して強い材料にすることができる。 Further, the first and second fiber layers 11a and 11b may be made of the same material or different materials. As an example of dissimilar materials, the bending at the pulley while the conveyor belt 1 goes around the conveyor body is more in the case where the steel cord 3 is on the inner peripheral side and the fiber layers 11a and 11b are on the outer peripheral side than in the opposite case. Since there are many, the fiber layer farther from the steel cord 3 can be made a material that is more resistant to fatigue due to expansion and contraction.
　次に、摩耗したカバーゴム９のリキャップ方法について説明する。先ず、図２（ａ）に示すように、第１及び第２の繊維層１１ａ、１１ｂ間に形成されたゴム層１３まで達する切込みＸを例えばコンベアベルト１の長手方向に沿って入れる。そして、カバーゴム９の切込みＸに挟まれた部分１５を第１の繊維層１１ａとともに例えばウインチ等を使用して剥離する。このとき、繊維層１１ａ、１１ｂによって補強されていないゴム層１３が引き裂け、図２（ｂ）に示すようにスチールコード３に近い第２の繊維層１１ｂはコンベアベルト１に残留する。次いで、図２（ｃ）に示すようにカバーゴム９の少なくとも一部が剥ぎ取られて残ったコンベアベルト１の残余部分１７（凹み部）に、リキャップ用の未加硫のカバーゴム１９を貼りなおし加硫する。 Next, a method for recapping the worn cover rubber 9 will be described. First, as shown in FIG. 2 (a), a cut X reaching the rubber layer 13 formed between the first and second fiber layers 11 a and 11 b is made, for example, along the longitudinal direction of the conveyor belt 1. And the part 15 pinched | interposed into the notch | incision X of the cover rubber 9 is peeled using a winch etc. with the 1st fiber layer 11a. At this time, the rubber layer 13 not reinforced by the fiber layers 11a and 11b is torn, and the second fiber layer 11b close to the steel cord 3 remains on the conveyor belt 1 as shown in FIG. Next, as shown in FIG. 2 (c), an unvulcanized cover rubber 19 for recapping is pasted on the remaining portion 17 (recessed portion) of the conveyor belt 1 remaining after the cover rubber 9 is peeled off. Then vulcanize.
　これによれば、カバーゴム９の一部を第１の繊維層１１ａとともに一気に剥ぐことができるので、バフ処理によりカバーゴム９を除去した場合に比べ大幅に時間と労力を節約することができ、また熟練を要する作業も必要とならない。また、第１の繊維層１１ａとともにカバーゴム９を剥ぐことから途中でカバーゴム９が千切れることがなく効率よく剥ぐことができる。さらに、２層の繊維層１１ａ、１１ｂ間のゴム層１３を引き裂いてカバーゴム９を除去することから、残った繊維層１１ｂの表面上に十分な量のゴムを残留させて新しいカバーゴム９との十分かつ均一な接着性を確保することができ、また、補修が必要となるほど引裂面が凸凹になることがなく、スチールコード３が露出するおそれもない。 According to this, since part of the cover rubber 9 can be peeled off together with the first fiber layer 11a, time and labor can be saved significantly compared to the case where the cover rubber 9 is removed by buffing, Also, no skill-intensive work is required. Further, since the cover rubber 9 is peeled off together with the first fiber layer 11a, the cover rubber 9 is not broken off in the middle and can be peeled off efficiently. Furthermore, since the rubber layer 13 between the two fiber layers 11a and 11b is torn and the cover rubber 9 is removed, a sufficient amount of rubber is left on the surface of the remaining fiber layer 11b, and a new cover rubber 9 and Sufficient and uniform adhesion can be ensured, and the tear surface does not become uneven enough to require repair, and the steel cord 3 is not exposed.
　以下、この発明の好適な種々の実施形態のコンベアベルトについて説明する。なお、先の図１及び２で示した実施形態のコンベアベルトと同様の部材には同様の符号を付し、その説明を省略する。 Hereinafter, the conveyor belts according to various preferred embodiments of the present invention will be described. In addition, the same code | symbol is attached | subjected to the member similar to the conveyor belt of embodiment shown in previous FIG. 1 and 2, and the description is abbreviate | omitted.
　先ず、図３はこの発明の他の実施形態のコンベアベルトの長手方向に沿う断面図である。この図に示すように、この実施形態のコンベアベルト１は、補強芯体としてのスチールコード３が埋設された本体ベルト５と、この本体ベルト５の搬送面７側に配置されたカバーゴム９とを備える。カバーゴム９内には搬送面７側から第１及び第２の２層の繊維層１１ａ、１１ｂが埋設され、これらの繊維層１１ａ、１１ｂ間にはゴム層１３が形成されている。そして、第１の繊維層１１ａはコンベアベルト１の長手方向（図３の左右方向）に複数に分割されている。 First, FIG. 3 is a sectional view along the longitudinal direction of a conveyor belt according to another embodiment of the present invention. As shown in this figure, the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5. Is provided. First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b. And the 1st fiber layer 11a is divided | segmented into plurality in the longitudinal direction (left-right direction of FIG. 3) of the conveyor belt 1. As shown in FIG.
　この実施形態のコンベアベルト１によれば、カバーゴム９に局所的な損傷ｄ（図３（ａ）参照）等が生じた際に、図３（ｂ）に示すように必要に応じて部分的にカバーゴム９を剥ぐことができるので、リキャップのさらなる効率化を図ることができる。 According to the conveyor belt 1 of this embodiment, when local damage d (see FIG. 3 (a)) or the like occurs in the cover rubber 9, it is partially necessary as shown in FIG. 3 (b). Since the cover rubber 9 can be peeled off, it is possible to further improve the efficiency of recapping.
　図４は、この発明のさらに他の実施形態のコンベアベルトの幅方向に沿う断面図である。この図に示すように、この実施形態のコンベアベルト１は、補強芯体としてのスチールコード３が埋設された本体ベルト５と、この本体ベルト５の搬送面７側に配置されたカバーゴム９とを備える。カバーゴム９内には搬送面７側から第１及び第２の２層の繊維層１１ａ、１１ｂが埋設され、これらの繊維層１１ａ、１１ｂ間にはゴム層１３が形成されている。そして、第１の繊維層１１ａはコンベアベルト１の幅方向（図４の左右方向）に複数に分割されている。 FIG. 4 is a cross-sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention. As shown in this figure, the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5. Is provided. First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b. And the 1st fiber layer 11a is divided | segmented into plurality in the width direction (left-right direction of FIG. 4) of the conveyor belt 1. As shown in FIG.
　この実施形態のコンベアベルト１によれば、カバーゴム９に局所的な損傷ｄ（図４（ａ）参照）等が生じた際に、図４（ｂ）に示すように必要に応じて部分的にカバーゴム９を剥ぐことができるので、リキャップのさらなる効率化を図ることができる。なお、第１の繊維層１１ａを長手方向にも幅方向にも複数に分割することでさらなるリキャップの効率化が図り得ることは言うまでもない。 According to the conveyor belt 1 of this embodiment, when local damage d (see FIG. 4 (a)) or the like occurs in the cover rubber 9, it is partially necessary as shown in FIG. 4 (b). Since the cover rubber 9 can be peeled off, it is possible to further improve the efficiency of recapping. It goes without saying that the efficiency of recapping can be further increased by dividing the first fiber layer 11a into a plurality of portions in the longitudinal direction and the width direction.
　図５は、この発明のさらに他の実施形態のコンベアベルトの幅方向に沿う断面図である。この図に示すように、この実施形態のコンベアベルト１は、補強芯体としてのスチールコード３が埋設された本体ベルト５と、この本体ベルト５の搬送面７側に配置されたカバーゴム９とを備える。カバーゴム９内には搬送面７側から第１及び第２の２層の繊維層１１ａ、１１ｂが埋設され、これらの繊維層１１ａ、１１ｂ間にはゴム層１３が形成されている。そして、第１及び第２の繊維層１１ａ、１１ｂはコンベアベルト１の全幅に延びる。 FIG. 5 is a sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention. As shown in this figure, the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5. Is provided. First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b. The first and second fiber layers 11 a and 11 b extend the entire width of the conveyor belt 1.
　この実施形態のコンベアベルト１によれば、カバーゴム９の一部を第１の繊維層１１ａとともに剥ぐにあたり、予めカバーゴム９にゴム層１３まで達する切込みＸ（図２（ａ）参照）を入れる必要がないので、さらなるリキャップの効率化を図ることができる。 According to the conveyor belt 1 of this embodiment, when part of the cover rubber 9 is peeled off together with the first fiber layer 11a, a cut X (see FIG. 2A) reaching the rubber layer 13 in advance is made in the cover rubber 9. Since it is not necessary, further recapping efficiency can be achieved.
　図６は、この発明のさらに他の実施形態のコンベアベルト１の幅方向に沿う断面図である。この図に示すように、この実施形態のコンベアベルト１は、補強芯体としてのスチールコード３が埋設された本体ベルト５と、この本体ベルト５の搬送面７側に配置されたカバーゴム９とを備える。カバーゴム９内には搬送面７側から第１及び第２の繊維層１１ａ、１１ｂの他に第３の繊維層１１ｃが埋設され、これらの繊維層１１ａ、１１ｂ及び１１ｃ間には２層のゴム層１３ａ、１３ｂが形成されている。 FIG. 6 is a cross-sectional view along the width direction of the conveyor belt 1 according to still another embodiment of the present invention. As shown in this figure, the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5. Is provided. A third fiber layer 11c is embedded in the cover rubber 9 in addition to the first and second fiber layers 11a and 11b from the conveying surface 7 side, and two layers are provided between these fiber layers 11a, 11b and 11c. Rubber layers 13a and 13b are formed.
　この実施形態のコンベアベルト１によれば、カバーゴム９の一部を第１の繊維層１１ａとともに剥ぎ、カバーゴム９のリキャップを行っても第２及び第３の繊維層１１ｂ、１１ｃをカバーゴム９内に残留させることができるので、リキャップを２回にわたって行うことができる。なお、ゴム層を形成する繊維層を増やせば増やすほどリキャップを行い得る回数は増加するので、４層以上の繊維層と３層以上のゴム層とを交互に積層配置すればさらなるリキャップ可能回数の増加を図ることができる。また、この実施形態のコンベアベルト１では、繊維層１１ａ、１１ｂ、１１ｃ間に形成されたゴム層１３ａ、１３ｂの引裂強度を搬送面７側程低く設定することが好ましい。このようにすれば、複数回に亘ってリキャップを行う際に、搬送面７側に近い方のゴム層１３ａを確実に（優先的に）引き裂くことができ、誤ってスチールコード３寄りの他のゴム層１３ｂを引き裂くおそれがない。 According to the conveyor belt 1 of this embodiment, a part of the cover rubber 9 is peeled off together with the first fiber layer 11a, and even if the cover rubber 9 is recapped, the second and third fiber layers 11b and 11c are covered with the cover rubber. 9 can be left in place, so the recapping can be performed twice. As the number of fiber layers forming the rubber layer increases, the number of recaps that can be performed increases. Therefore, if four or more fiber layers and three or more rubber layers are alternately stacked, the number of recaps can be increased. An increase can be aimed at. Moreover, in the conveyor belt 1 of this embodiment, it is preferable that the tear strength of the rubber layers 13a and 13b formed between the fiber layers 11a, 11b, and 11c is set to be lower toward the conveyance surface 7 side. In this way, when performing recapping over a plurality of times, the rubber layer 13a closer to the conveying surface 7 side can be reliably (priorly) torn, and the other side closer to the steel cord 3 can be mistaken. There is no risk of tearing the rubber layer 13b.
　図７（ａ）は、この発明のさらに他の実施形態のコンベアベルトの幅方向に沿う断面図であり、図７（ｂ）は、図７（ａ）のコンベアベルトの拡大断面図である。この図に示すように、この実施形態のコンベアベルト１は、補強芯体としてのスチールコード３が埋設された本体ベルト５と、この本体ベルト５の搬送面７側に配置されたカバーゴム９とを備える。カバーゴム９内には搬送面７側から第１及び第２の２層の繊維層１１ａ、１１ｂが埋設され、これらの繊維層１１ａ、１１ｂ間にはゴム層１３が形成されている。そして、かかるゴム層１３は、第１及び第２の繊維層１１ａ、１１ｂに隣接して配置された比較的引裂強度が高い、つまり引き裂け難い高引裂ゴム部材２１、２１と、これら２層の高引裂ゴム部材２１、２１間に配置された、高引裂ゴム部材２１、２１より引裂強度が低い、つまり引き裂け易い低引裂ゴム部材２３とを有する。ＪＩＳ　Ｋ６３０１Ｂ形に準じて計測した高引裂ゴム部材２１、２１と低引裂ゴム部材２３との引裂強度の差は、コンベアベルト１の耐久性能を考慮すると３０Ｎ／ｍｍ以下とすることが好ましく、後述するような低引裂ゴム部材２３の優先的な引裂けを確実に生じさせるという観点からは、５Ｎ／ｍｍ以上であることが好ましい。高引裂ゴム部材２１、２１と低引裂ゴム部材２３との間に引裂強度の差を生じさせるにあたっては、高引裂ゴム部材２１、２１の引裂強度を増大させても良いし、低引裂ゴム部材２３の引裂力を低下させても良く、例えば、ゴム部材の引裂力を低下させるにあたっては、ゴム部材に炭酸カルシウム等の無機充填物を配合したり、ＮＲ／ＳＢＲブレント配合の場合には、ＳＢＲ比率を上げたりすることができる。 FIG. 7A is a sectional view taken along the width direction of a conveyor belt according to still another embodiment of the present invention, and FIG. 7B is an enlarged sectional view of the conveyor belt of FIG. 7A. As shown in this figure, the conveyor belt 1 of this embodiment includes a main body belt 5 in which a steel cord 3 as a reinforcing core body is embedded, and a cover rubber 9 disposed on the conveying surface 7 side of the main body belt 5. Is provided. First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b. The rubber layer 13 includes the high tear rubber members 21 and 21 that are disposed adjacent to the first and second fiber layers 11a and 11b and have a relatively high tear strength, that is, are difficult to tear. It has the low tear rubber member 23 which is arrange | positioned between the tear rubber members 21 and 21 and whose tear strength is lower than the high tear rubber members 21 and 21, ie, is easy to tear. The difference in tear strength between the high tear rubber members 21 and 21 and the low tear rubber member 23 measured according to JIS K6301B type is preferably 30 N / mm or less in consideration of the durability performance of the conveyor belt 1 and will be described later. From the viewpoint of surely causing such preferential tearing of the low tear rubber member 23, it is preferably 5 N / mm or more. In generating a difference in tear strength between the high tear rubber members 21 and 21 and the low tear rubber member 23, the tear strength of the high tear rubber members 21 and 21 may be increased, or the low tear rubber member 23 may be increased. For example, when reducing the tearing force of a rubber member, an inorganic filler such as calcium carbonate is blended in the rubber member, or in the case of blending NR / SBR Brent, the SBR ratio Can be raised.
　この実施形態のコンベアベルト１によれば、カバーゴム９の一部を第１の繊維層１１ａとともに剥ぐに際し、低引裂ゴム部材２３に優先的に引裂けを生じさせ、カバーベルト９に残った第２の繊維層１１ｂの表面上に、リキャップ用の新たなカバーゴム１９との優良な接合をもたらすゴム材料（高引裂ゴム部材２１）を確実に残留させることができ、リキャップ用のカバーゴム１９と繊維層１１ｂとの間に高い接着力を確保することができる。また、低引裂ゴム部材２３を優先して引き裂くことができるので、引裂面を平滑にすることができ、この観点からいえば、低引裂ゴム部材２３の厚さを高引裂ゴム部材２１、２１の厚さに比べ小さくすれば、引裂けによって生じる引裂面の凸凹をより小さなものとすることができる。 According to the conveyor belt 1 of this embodiment, when part of the cover rubber 9 is peeled off together with the first fiber layer 11a, the low tear rubber member 23 is preferentially torn, and the first remaining on the cover belt 9 is removed. On the surface of the second fiber layer 11b, a rubber material (high tear rubber member 21) that brings about excellent bonding with a new cover rubber 19 for recapping can reliably remain, and the cover rubber 19 for recapping and A high adhesive force can be ensured between the fiber layer 11b. In addition, since the low tear rubber member 23 can be preferentially torn, the tear surface can be smoothed. From this point of view, the thickness of the low tear rubber member 23 is set to be higher than that of the high tear rubber members 21, 21. If the thickness is smaller than the thickness, the unevenness of the tear surface caused by tearing can be made smaller.
　次に、この発明に従うコンベアベルトを複数回に亘ってリキャップ可能とする方法について説明する。ここで、図８は、この発明に従うコンベアベルトのリキャップ方法を示す、コンベアベルトの幅方向断面図である。 Next, a method for allowing the conveyor belt according to the present invention to be recapped a plurality of times will be described. Here, FIG. 8 is a cross-sectional view in the width direction of the conveyor belt, showing the conveyor belt recapping method according to the present invention.
　この図８（ａ）に示すように、この実施形態のコンベアベルト１は、補強芯体としてのスチールコード３が埋設された本体ベルト５と、この本体ベルト５の搬送面７側に配置されたカバーゴム９とを備える。カバーゴム９内には搬送面７側から第１及び第２の２層の繊維層１１ａ、１１ｂが埋設され、これらの繊維層１１ａ、１１ｂ間にはゴム層１３が形成されている。 As shown in FIG. 8 (a), the conveyor belt 1 of this embodiment is disposed on a main body belt 5 in which a steel cord 3 as a reinforcing core is embedded, and on the conveying surface 7 side of the main body belt 5. Cover rubber 9 is provided. First and second two fiber layers 11a and 11b are embedded in the cover rubber 9 from the conveying surface 7 side, and a rubber layer 13 is formed between the fiber layers 11a and 11b.
　図８（ｂ）では、使用により摩耗等したカバーゴム９の一部が第１の繊維層１１ａとともに剥ぎ取られている。上述した例では、コンベアベルト１の残余部分１７にリキャップ用のカバーゴム１９を貼り合わせることでリキャップを行っていたが、この例では、リキャップ用のカバーゴム１９を貼り合わせる前に、図８（ｃ）に示すように、コンベアベルト１の残余部分１７に残った第２の繊維層１１ｂとの間にゴム層１３を再度形成する新たな繊維層１１ｄを配設することを特徴とする。カバーゴム１９は、図８（ｃ）に示すように単体としての繊維層１１ｄをコンベアベルト１の残余部分１７に配設した後に貼り付けることができる。上記新たな繊維層１１ｄを配設するにあたっては、図９に示すリキャップ用のカバーゴム１９のように、カバーゴム１９内に新たな繊維層１１ｄを予め配設しておき、カバーゴム１９の貼り付けと同時に繊維層１１ｂとの間に新たにゴム層１３を形成する構成とすることもできる。 In FIG. 8 (b), a part of the cover rubber 9 which has been worn away by use is peeled off together with the first fiber layer 11a. In the above-described example, recapping is performed by bonding the recapping cover rubber 19 to the remaining portion 17 of the conveyor belt 1, but in this example, before the recapping cover rubber 19 is bonded, FIG. As shown in c), a new fiber layer 11d for re-forming the rubber layer 13 is disposed between the second fiber layer 11b remaining on the remaining portion 17 of the conveyor belt 1 and the second fiber layer 11b. The cover rubber 19 can be attached after the fiber layer 11d as a single body is disposed on the remaining portion 17 of the conveyor belt 1 as shown in FIG. When the new fiber layer 11d is disposed, a new fiber layer 11d is previously disposed in the cover rubber 19 like the recapping cover rubber 19 shown in FIG. The rubber layer 13 may be newly formed between the fiber layer 11b and the fiber layer 11b.
　これによれば、複数回のリキャップを可能にするに際して、図６で示した実施形態のコンベアベルト１のように予め多数の繊維層１１ａ、１１ｂ、１１ｃをカバーゴム９内に配設しておく必要がないことから、リキャップ前後におけるコンベアベルト１の剛性を一定に保つことができる。 According to this, when enabling a plurality of recaps, a large number of fiber layers 11a, 11b, and 11c are disposed in the cover rubber 9 in advance as in the conveyor belt 1 of the embodiment shown in FIG. Since it is not necessary, the rigidity of the conveyor belt 1 before and after the recapping can be kept constant.
　以上、図示例に基づき説明したが、この発明は上述の実施例に限定されるものでなく、特許請求の範囲の記載範囲内で適宜変更することができるものであり、例えば、交互に積層配置された少なくとも２層の繊維層と少なくとも１層のゴム層とを有するカバーゴムは、搬送面とは反対側の面にも設けることができる。また、図３及び４の例では、最も搬送面に近い繊維層を分割構造としたが、これよりもスチールコード側の繊維層をも分割構造とすることができる。特にこれは、３層以上の繊維層と２層以上のゴム層とを交互に積層配置し、２回以上のリキャップを可能とする場合に有利となる。 Although the present invention has been described above based on the illustrated examples, the present invention is not limited to the above-described embodiments, and can be appropriately changed within the scope of the claims, for example, alternately arranged in layers. The cover rubber having at least two fiber layers and at least one rubber layer can be provided on the surface opposite to the conveying surface. 3 and 4, the fiber layer closest to the conveying surface has a split structure, but the fiber layer on the steel cord side can also have a split structure. In particular, this is advantageous in the case where three or more fiber layers and two or more rubber layers are alternately laminated to enable recapping twice or more.
　かくしてこの発明のコンベアベルト及びコンベアベルトのリキャップ方法によれば、使用後のカバーゴムをリキャップする際に、本体ベルトの表面が凸凹となったりスチールコードが露出したりすることなく効率よくカバーゴムを剥すことが可能となる。 Thus, according to the conveyor belt and the conveyor belt recap method of the present invention, when the cover rubber after use is recapped, the cover rubber is efficiently removed without the surface of the main body belt becoming uneven or exposing the steel cord. It can be peeled off.
　１　コンベアベルト
　３　スチールコード
　５　本体ベルト
　７　搬送面
　９　カバーゴム
　１１ａ、１１ｂ、１１ｃ、１１ｄ　繊維層
　１３、１３ａ、１３ｂ　ゴム層
　１７　コンベアベルトの残余部分
　１９　新たなカバーゴム
　２１　高引裂ゴム部材
　２３　低引裂ゴム部材 DESCRIPTION OF SYMBOLS 1 Conveyor belt 3 Steel cord 5 Main body belt 7 Conveying surface 9 Cover rubber 11a, 11b, 11c, 11d Fiber layer 13, 13a, 13b Rubber layer 17 Remaining part of conveyor belt 19 New cover rubber 21 High tear rubber member 23 Low tear Rubber member

Claims (10)

  1. 　補強芯体としてスチールコードが埋設された本体ベルトと、該本体ベルトの少なくとも搬送面側に配置されたカバーゴムとを備えるコンベアベルトにおいて、
    　前記カバーゴム内に少なくとも２層の繊維層と少なくとも１層のゴム層とを交互に積層配置したことを特徴とするコンベアベルト。     In a conveyor belt comprising a main body belt in which a steel cord is embedded as a reinforcing core, and a cover rubber disposed on at least the conveying surface side of the main body belt,
    A conveyor belt, wherein at least two fiber layers and at least one rubber layer are alternately laminated in the cover rubber.
  2. 　前記繊維層は、帆布で構成される、請求項１に記載のコンベアベルト。 The conveyor belt according to claim 1, wherein the fiber layer is made of canvas.
  3. 　前記少なくとも２層の繊維層のうち少なくとも最も前記搬送面側に位置する繊維層は、コンベアベルトの長手方向に複数に分割されている、請求項１又は２に記載のコンベアベルト。 The conveyor belt according to claim 1 or 2, wherein at least the fiber layer located closest to the transport surface among the at least two fiber layers is divided into a plurality in the longitudinal direction of the conveyor belt.
  4. 　前記少なくとも２層の繊維層のうち少なくとも最も前記搬送面側に位置する繊維層は、コンベアベルトの幅方向に複数に分割されている、請求項１～３の何れか一項に記載のコンベアベルト。 The conveyor belt according to any one of claims 1 to 3, wherein at least the fiber layer located closest to the transport surface among the at least two fiber layers is divided into a plurality of portions in a width direction of the conveyor belt. .
  5. 　前記少なくとも２層の繊維層のうち少なくとも最も前記搬送面側に位置する繊維層は、コンベアベルトの全幅に延びる、請求項１～４の何れか一項に記載のコンベアベルト。 The conveyor belt according to any one of claims 1 to 4, wherein at least the fiber layer located closest to the conveying surface among the at least two fiber layers extends over the entire width of the conveyor belt.
  6. 　前記カバーゴム内に少なくとも３層の繊維層と少なくとも２層のゴム層とが交互に積層配置され、該ゴム層の引裂強度は、搬送面側程低い、請求項１～５の何れか一項に記載のコンベアベルト。 6. The cover rubber according to claim 1, wherein at least three fiber layers and at least two rubber layers are alternately laminated in the cover rubber, and the tear strength of the rubber layer is lower toward the conveying surface side. Conveyor belt as described in.
  7. 　前記ゴム層は、前記繊維層に隣接して配置された比較的引裂強度が高い２つの高引裂ゴム部材と、これら高引裂ゴム部材間に配置された該高引裂ゴム部材よりも引裂強度が低い低引裂ゴム部材とから構成される、請求項１～６の何れか一項に記載のコンベアベルト。 The rubber layer has two high tear rubber members disposed adjacent to the fiber layer and relatively high tear strength, and has a lower tear strength than the high tear rubber member disposed between the high tear rubber members. The conveyor belt according to any one of claims 1 to 6, comprising a low tear rubber member.
  8. 　補強芯体としてスチールコードが埋設された本体ベルトと、該本体ベルトの少なくとも搬送面側に配置されたカバーゴムと、該カバーゴム内に配置された少なくとも２層の繊維層によってこれら繊維層間に形成されたゴム層とを備えるコンベアベルトのカバーゴムをリキャップするにあたり、
    　前記２層の繊維層間のゴム層を引き裂き、該繊維層のうち前記スチールコードに近い一方の繊維層をコンベアベルトに残留させつつ他方の繊維層を前記カバーゴムの少なくとも一部とともに剥ぎ取る工程と、
    　前記カバーゴムの少なくとも一部が剥ぎ取られて前記コンベアベルトに残留したコンベアベルトの残余部分に、リキャップ用のカバーゴムを貼り合わせる工程と、を含むことを特徴とするコンベアベルトのリキャップ方法。     Formed between these fiber layers by a main body belt in which a steel cord is embedded as a reinforcing core, a cover rubber disposed at least on the conveying surface side of the main body belt, and at least two fiber layers disposed in the cover rubber In the case of recapping the cover rubber of the conveyor belt provided with the rubber layer,
    Tearing the rubber layer between the two fiber layers, leaving one of the fiber layers close to the steel cord on the conveyor belt and stripping the other fiber layer together with at least a portion of the cover rubber; ,
    A method of recapping the conveyor belt, comprising: attaching a cover rubber for recapping to the remaining portion of the conveyor belt that has been peeled off and remains on the conveyor belt.
  9. 　前記コンベアベルトの残余部分に残った繊維層との間に前記ゴム層を再度形成する繊維層を配設する工程を含む、請求項８に記載のコンベアベルトのリキャップ方法。 The method for recapping a conveyor belt according to claim 8, comprising a step of disposing a fiber layer for re-forming the rubber layer between the fiber layer remaining in the remaining portion of the conveyor belt.
  10. 　前記コンベアベルトの残余部分に、リキャップ用のカバーゴムを貼り合わせるにあたり、該残余部分に残った繊維層との間に前記ゴム層を再度形成する繊維層を少なくとも１層有するリキャップ用のカバーゴムを貼り合わせる、請求項に８又は９に記載のコンベアベルトのリキャップ方法。 When attaching a cover rubber for recapping to the remaining portion of the conveyor belt, a cover rubber for recapping having at least one fiber layer that forms the rubber layer again with the fiber layer remaining in the remaining portion. The method for recapping a conveyor belt according to claim 8 or 9, wherein the conveyor belts are bonded together.
PCT/JP2009/062632 2008-07-22 2009-07-10 Conveyor belt and recapping method for conveyor belt WO2010010824A1 (en)

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JPH061317U (en) * 1992-06-04 1994-01-11 横浜ゴム株式会社 Conveyor belt joining structure
JPH0761549A (en) * 1993-08-30 1995-03-07 Mitsuboshi Belting Ltd Structure of connection part of conveyor belt
JPH07206122A (en) * 1994-01-24 1995-08-08 Mitsuboshi Belting Ltd Flexible conveyor belt
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JPH061317U (en) * 1992-06-04 1994-01-11 横浜ゴム株式会社 Conveyor belt joining structure
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CN110053995A (en) * 2019-05-23 2019-07-26 东莞众艺机械设备有限公司 A kind of production conveyer belt

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