JP4798528B2 - Conveyor belt reinforcement method and conveyor belt joint structure - Google Patents

Conveyor belt reinforcement method and conveyor belt joint structure Download PDF

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JP4798528B2
JP4798528B2 JP2008302539A JP2008302539A JP4798528B2 JP 4798528 B2 JP4798528 B2 JP 4798528B2 JP 2008302539 A JP2008302539 A JP 2008302539A JP 2008302539 A JP2008302539 A JP 2008302539A JP 4798528 B2 JP4798528 B2 JP 4798528B2
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conveyor belt
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正義 安達
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昭和ゴム機材株式会社
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Description

本発明は、コンベヤベルトをエンドレス状に接合する際に、継手金具を打込むベルト端部を強化することができるコンベヤベルトの補強方法及びコンベヤベルトの接合部構造に関するものである。   The present invention relates to a conveyor belt reinforcing method and a conveyor belt joint structure that can reinforce a belt end portion into which a joint fitting is driven when joining the conveyor belt endlessly.

コンベヤベルトをエンドレス状に接合する際に、ベルト端部に継手金具を打込んで連結する接合手段がある。この種の接合手段では、継手金具を打込む際に生じる孔がベルト端部の強度に影響を与え、一般に製品強度の４０％以下に低下してしまうことが知られている。   When joining the conveyor belt in an endless manner, there is a joining means for driving and connecting a joint fitting to the end of the belt. In this type of joining means, it is known that the holes generated when the fitting is driven influences the strength of the belt end and generally decreases to 40% or less of the product strength.

特許文献１に、コンベヤベルトにおけるベルト端部の強度を高める従来例が記載されている。この特許文献１によると、ベルト端部のカバーゴムを剥ぎ取り、芯体層を露出させ、この芯体層上に補強帆布を接合し、更に補強帆布の上から未加硫のカバーゴムを当てて加硫することで、芯体層と補強帆布とカバーゴムとを一体化するものである。このように、ベルト端部の芯体層とカバーゴムとの間に補強帆布を介在することで、ベルト端部の強度を高めようとするものである。
実開昭６２‐７７３５０号公報 Patent Document 1 describes a conventional example in which the strength of a belt end portion in a conveyor belt is increased. According to this Patent Document 1, the cover rubber at the end of the belt is peeled off, the core layer is exposed, the reinforcing canvas is joined to the core layer, and the unvulcanized cover rubber is applied on the reinforcing canvas. By vulcanizing, the core layer, the reinforcing canvas, and the cover rubber are integrated. In this way, the reinforcing canvas is interposed between the core layer at the belt end portion and the cover rubber, thereby increasing the strength of the belt end portion.
Japanese Utility Model Publication No. 62-77350

ところが、特許文献１において、芯体層に未加硫ゴム付補強帆布を貼り付け、その後、この未加硫ゴム付補強帆布の上面に更に未加硫のカバーゴム部材を当てて加硫する方法によると、補強帆布とカバーゴムとの接合力は十分に得られても、肝心な芯体層と補強帆布との接合力に課題を残すものであった。この結果、継手金具を介して補強帆布に張力が加わると、芯体層から補強帆布が剥離するおそれがあった。   However, in Patent Document 1, a method of pasting a reinforcing canvas with unvulcanized rubber on the core layer and then vulcanizing by applying an unvulcanized cover rubber member to the upper surface of the reinforcing canvas with unvulcanized rubber. According to the above, even if a sufficient bonding force between the reinforcing canvas and the cover rubber is obtained, there remains a problem in the bonding force between the core body layer and the reinforcing canvas. As a result, when tension is applied to the reinforcing canvas via the joint fitting, the reinforcing canvas may be peeled off from the core layer.

一方、ベルトコンベヤには、ベルトの表面を清掃するベルトクリーナーや、ベルトの裏面において付着物を掻き取りベルトの付着物を除去するスクレーパーなどの器具が装着される場合がある。そのため、ベルト端部に打込んだ継手金具がベルト本体の表面より突出していると、このような器具に突出している継手金具が接触して極めて危険な状態になり、使用できなくなるおそれもある。   On the other hand, the belt conveyor may be equipped with a device such as a belt cleaner that cleans the surface of the belt and a scraper that scrapes off deposits on the back surface of the belt and removes deposits on the belt. For this reason, if the joint fitting that has been driven into the belt end protrudes from the surface of the belt body, the joint fitting that protrudes from such a tool comes into contact with each other, resulting in an extremely dangerous state, and may not be usable.

そこで、本発明は上述の課題を解消すべく創出されたもので、コンベヤベルトの端部強度を高めると共に、ベルト端部に打込んだ継手金具がベルト本体の表面より突出しないように補強することができるコンベヤベルトの補強方法及びコンベヤベルトの接合部構造の提供を目的とするものである。   Accordingly, the present invention was created to solve the above-described problems, and enhances the strength of the end of the conveyor belt and reinforces the fitting that is driven into the end of the belt so that it does not protrude from the surface of the belt body. It is an object of the present invention to provide a method for reinforcing a conveyor belt, and a conveyor belt joint structure.

本発明の第１の手段は、芯材層２の上下面にカバーゴム３が積層され、端部にエンドレス状に連結する継手金具１０が装着されるコンベヤベルトの補強方法において、芯材層２の補強しようとする面側に積層されているカバーゴム３を切除するカバー切除工程１００と、カバーゴム３が切除された芯材層２の補強面２Ａから、該補強面２Ａに隣接してカバーゴム３の切断端面及び該端面に沿ったカバーゴム３の表面がわ端縁にかけてバフ掛けするバフ掛け工程２００と、芯材層２の補強面２Ａからカバーゴム３のバフ掛け面３Ａにかけて未加硫コーティングシート４を重ねる未加硫コーティングシート積層工程３００と、未加硫のゴムを含浸させた補強布５を芯材層２の補強面２Ａの未加硫コーティングシート４上に積層する補強布積層工程４００と、芯材層２と未加硫コーティングシート４と補強布５とを熱圧着して一体化する熱圧着工程５００とからなり、補強布５の厚みを該補強布５がわに装着した前記継手金具１０がカバーゴム３の表面より突出しないように設定した補強方法にある。   The first means of the present invention is a method for reinforcing a conveyor belt in which cover rubbers 3 are laminated on the upper and lower surfaces of a core material layer 2 and end fittings are attached to end portions. A cover cutting step 100 for cutting the cover rubber 3 laminated on the surface side to be reinforced, and a reinforcing surface 2A of the core material layer 2 from which the cover rubber 3 has been cut, cover the reinforcing surface 2A adjacently. A buffing step 200 in which the cut end surface of the rubber 3 and the surface of the cover rubber 3 along the end surface are buffed toward the edge of the flange, and the unbundled portion from the reinforcing surface 2A of the core material layer 2 to the buffing surface 3A of the cover rubber 3 A non-vulcanized coating sheet laminating process 300 for stacking the sulfur coating sheet 4 and a reinforcing cloth for laminating the reinforcing cloth 5 impregnated with unvulcanized rubber on the unvulcanized coating sheet 4 on the reinforcing surface 2A of the core material layer 2 Lamination process 00, a thermocompression bonding process 500 in which the core material layer 2, the unvulcanized coating sheet 4 and the reinforcing cloth 5 are integrated by thermocompression bonding, and the reinforcing cloth 5 has a thickness attached to the reinforcing cloth 5. In the reinforcing method, the joint fitting 10 is set so as not to protrude from the surface of the cover rubber 3.

第２の手段は、前記熱圧着工程５００において、前記補強布５を配した面の反対側面のカバーゴム３に厚み調整板Ｐを圧着して継手装着面３Ａを形成し、該継手装着面３Ａがわに装着した前記継手金具１０が隣接するカバーゴム３の表面より突出しないように設定する。   In the thermocompression bonding process 500, a second means is to form a joint mounting surface 3A by pressing the thickness adjusting plate P on the cover rubber 3 on the side opposite to the surface on which the reinforcing cloth 5 is disposed, and the joint mounting surface 3A. It is set so that the joint fitting 10 attached to the glue does not protrude from the surface of the adjacent cover rubber 3.

第３の手段において、前記補強布５は、ナイロン、ポリエステルの繊維織布に前記カバーゴム３と同じ材質の未加硫ゴム材を含浸せしめコンベヤベルトの２乃至５倍の引き裂き強度に形成された補強布５を使用する。   In a third means, the reinforcing cloth 5 is formed by impregnating a nylon or polyester fiber woven cloth with an unvulcanized rubber material made of the same material as the cover rubber 3 so as to have a tear strength 2 to 5 times that of the conveyor belt. Reinforcing cloth 5 is used.

第４の手段は、前記未加硫コーティングシート積層工程３００において、未加硫コーティングシート４は、前記カバーゴム３と同じ材質の未加硫材が０．５mm厚のシート状に形成されたものを使用すると共に、前記芯材層２の補強面２Ａに加硫用接着剤を塗布し該加硫用接着剤が乾燥後、該未加硫コーティングシート４を接合する。
A fourth means is that in the unvulcanized coating sheet laminating step 300, the unvulcanized coating sheet 4 is formed by forming an unvulcanized material of the same material as the cover rubber 3 into a sheet shape having a thickness of 0.5 mm. In addition, a vulcanizing adhesive is applied to the reinforcing surface 2A of the core material layer 2, and after the vulcanizing adhesive is dried, the unvulcanized coating sheet 4 is joined.

第５の手段は、芯材層２の上下面にカバーゴム３が積層されたコンベヤベルト１において、該コンベヤベルト１をエンドレス状に連結する継手金具１０が装着されるベルト端部の芯材層２の表面側から該芯材層２に隣接するカバーゴム３の表面がわ端縁にかけて積層された未加硫コーティングシート４層と、該未加硫コーティングシート４層を介して未加硫のゴムを含侵させた補強布５が芯材層２の上に積層された補強布５層と、からなり、芯材層２と未加硫コーティングシート４と補強布５とが熱圧着で一体化されていると共に、未加硫コーティングシート４の一部がカバーゴム３の表面側を覆うように形成され、補強布５の厚みを該補強布５がわに装着した前記継手金具１０がカバーゴム３の表面より突出しないように設定した接合部構造にある。   The fifth means is a conveyor belt 1 in which the cover rubber 3 is laminated on the upper and lower surfaces of the core material layer 2, and the core material layer at the end of the belt to which the joint metal fitting 10 for connecting the conveyor belt 1 in an endless manner is mounted. The unvulcanized coating sheet 4 layer is formed by laminating the surface of the cover rubber 3 adjacent to the core material layer 2 from the surface side of the core 2 to the edge of the flange, and the unvulcanized coating sheet 4 layer through the unvulcanized coating sheet 4 layer. The reinforcing cloth 5 impregnated with rubber is laminated on the core material layer 2, and the core material layer 2, the unvulcanized coating sheet 4 and the reinforcing cloth 5 are integrated by thermocompression bonding. In addition, the joint metal fitting 10 in which a part of the unvulcanized coating sheet 4 is formed so as to cover the surface side of the cover rubber 3 and the reinforcing cloth 5 is attached to the hook is covered with the joint fitting 10. Joint structure set so as not to protrude from the surface of rubber 3 Located in.

第６の手段は、前記補強布５を配した面の反対側面のカバーゴム３に厚み調整板Ｐを圧着して継手装着面３Ａが形成され、該継手装着面３Ａがわに装着した前記継手金具１０が隣接するカバーゴム３の表面より突出しないように継手装着面３Ａの厚みが設定されたことを課題解消のための手段とする。   The sixth means is that the joint mounting surface 3A is formed by pressure-bonding the thickness adjusting plate P to the cover rubber 3 on the side opposite to the surface on which the reinforcing cloth 5 is disposed, and the joint mounting surface 3A is attached to the alligator. A means for solving the problem is that the thickness of the joint mounting surface 3A is set so that the metal fitting 10 does not protrude from the surface of the adjacent cover rubber 3.

本発明請求項１の補強方法により、芯材層２の補強面２Ａからカバーゴム３のバフ掛け面３Ａにかけて積層した未加硫コーティングシート４が、熱圧着により芯材層２と未加硫のゴムを含侵させた補強布５とを一体化することができる。このとき、補強布５の厚みを該補強布５がわに装着した前記継手金具１０がカバーゴム３の表面より突出しないように設定したことで、継手金具１０部分がベルト表面に突出してベルトクリーナーに接触するおそれは解消された。   According to the reinforcing method of the present invention, the unvulcanized coating sheet 4 laminated from the reinforcing surface 2A of the core material layer 2 to the buffing surface 3A of the cover rubber 3 is bonded with the core material layer 2 by thermocompression bonding. The reinforcing cloth 5 impregnated with rubber can be integrated. At this time, the thickness of the reinforcing cloth 5 is set so that the joint metal fitting 10 attached to the reinforcing cloth 5 does not protrude from the surface of the cover rubber 3, so that the joint metal fitting 10 portion protrudes from the belt surface and the belt cleaner. The risk of touching was eliminated.

しかも、バフ掛け工程２００や未加硫コーティングシート積層工程３００により、芯材層２と補強布５とを強力に且つ一体的に接合できるので、極めて強い接合力を得ることができる。   Moreover, since the core material layer 2 and the reinforcing cloth 5 can be strongly and integrally joined by the buffing process 200 and the unvulcanized coating sheet lamination process 300, an extremely strong joining force can be obtained.

また、ベルト本体とベルト端部との境界部分は、未加硫コーティングシート４が段差を解消しているので、コンベヤベルトを回転させる各種のローラーに接する際の負荷を少なくすることができ、耐久性を伸ばし、搬送時のガタ付等を抑止することができる。   In addition, since the unvulcanized coating sheet 4 eliminates the step at the boundary between the belt body and the belt end, the load when contacting the various rollers that rotate the conveyor belt can be reduced, and durability It is possible to increase the properties and suppress backlash during transportation.

請求項２によると、前記熱圧着工程５００において、前記補強布５を配した面の反対側面のカバーゴム３に厚み調整板Ｐを圧着して継手装着面３Ａを形成し、該継手装着面３Ａがわに装着した前記継手金具１０が隣接するカバーゴム３の表面より突出しないように設定しているので、ベルトの裏側に継手金具１０部分が突出してスクレーパーに接触するおそれも解消された。   According to claim 2, in the thermocompression bonding step 500, the thickness adjusting plate P is pressure-bonded to the cover rubber 3 on the side opposite to the surface on which the reinforcing cloth 5 is disposed to form the joint mounting surface 3A, and the joint mounting surface 3A. Since the joint fitting 10 attached to the hook is set so as not to protrude from the surface of the adjacent cover rubber 3, the possibility that the joint fitting 10 portion protrudes on the back side of the belt and contacts the scraper is also eliminated.

また、請求項３の補強布５として、ナイロン、ポリエステルの繊維織布に前記カバーゴム３と同じ材質の未加硫ゴム材を含侵させることで、補強布５の引き裂き強度を少なくともコンベヤベルトの２乃至５倍の補強布５を選択することが可能になる。   Further, as the reinforcing cloth 5 of claim 3, a nylon or polyester fiber woven cloth is impregnated with an unvulcanized rubber material made of the same material as the cover rubber 3 so that the tearing strength of the reinforcing cloth 5 is at least that of the conveyor belt. It becomes possible to select 2 to 5 times the reinforcing cloth 5.

請求項４の未加硫コーティングシート４として、前記カバーゴム３と同じ材質の未加硫コーティングシート４を使用することで、未加硫のゴムを含侵させた補強布５との相性が極めて良好になり、未加硫コーティングシート４と補強布５とを強固に一体化することができる。   By using the unvulcanized coating sheet 4 made of the same material as the cover rubber 3 as the unvulcanized coating sheet 4 according to claim 4, the compatibility with the reinforcing cloth 5 impregnated with the unvulcanized rubber is extremely high. As a result, the unvulcanized coating sheet 4 and the reinforcing cloth 5 can be firmly integrated.

さらに芯材層２のバフ掛けした補強面２Ａに加硫用接着剤を塗布し、乾燥後、未加硫コーティングシート４を接合することで、芯材層２の材質に係らず未加硫コーティングシート４を一体化することができる。   Furthermore, an adhesive for vulcanization is applied to the buffed reinforcing surface 2A of the core material layer 2, and after drying, an unvulcanized coating sheet 4 is joined, so that an unvulcanized coating is performed regardless of the material of the core material layer 2. The sheet 4 can be integrated.

請求項５、６に記載の補強コンベヤベルトによると、極めて強い接合力を得ることができると共に、ベルト端部に連結した継手金具１０の厚みがコンベヤベルト本体よりも厚くならないように設けることができる。   According to the reinforcing conveyor belts of the fifth and sixth aspects, an extremely strong joining force can be obtained and the thickness of the joint fitting 10 connected to the belt end can be provided so as not to be thicker than the conveyor belt body. .

このように本発明によると、コンベヤベルトの端部強度を高めると共に、ベルト端部に打込んだ継手金具がベルト本体の表面より突出しないようにして補強することができるなどといった産業上有益な種々の効果を奏するものである。   As described above, according to the present invention, various industrially beneficial effects such as enhancing the strength of the end portion of the conveyor belt and reinforcing the joint fitting driven into the end portion of the belt so as not to protrude from the surface of the belt body. The effect of this is achieved.

本発明の最良の形態は、芯材層２の補強しようとする面側に積層されているカバーゴム３を切除するカバー切除工程１００と、カバーゴム３が切除された芯材層２の補強面２Ａから、該補強面２Ａに隣接してカバーゴム３の切断端面及び該端面に沿ったカバーゴム３の表面がわ端縁にかけてバフ掛けするバフ掛け工程２００と、芯材層２の補強面２Ａからカバーゴム３のバフ掛け面３Ａにかけて加硫用接着剤を塗布し該加硫用接着剤が乾燥後、カバーゴム３と同じ材質の未加硫ゴム材が０．５mm厚のシート状に形成された未加硫コーティングシート４を重ねる未加硫コーティングシート積層工程３００と、ナイロン、ポリエステルの繊維織布にカバーゴム３と同じ材質の未加硫ゴム材を含侵せしめコンベヤベルトの２乃至５倍の引き裂き強度に形成された補強布５を芯材層２の補強面２Ａの未加硫コーティングシート４上に積層する補強布積層工程４００と、芯材層２と未加硫コーティングシート４と補強布５とを熱圧着して一体化する熱圧着工程５００とからなり、補強布５の厚みを該補強布５がわに装着した前記継手金具１０がカバーゴム３の表面より突出しないように設定する補強方法により、当初の目的を達成するものである。   The best mode of the present invention is the cover cutting step 100 for cutting the cover rubber 3 laminated on the side of the core layer 2 to be reinforced, and the reinforcing surface of the core layer 2 from which the cover rubber 3 has been cut. 2A, a buffing step 200 for buffing the cut end surface of the cover rubber 3 adjacent to the reinforcing surface 2A and the surface of the cover rubber 3 along the end surface toward the edge of the flange, and the reinforcing surface 2A of the core layer 2 After applying a vulcanizing adhesive to the buffing surface 3A of the cover rubber 3 and drying the vulcanizing adhesive, an unvulcanized rubber material of the same material as the cover rubber 3 is formed into a sheet of 0.5 mm thickness. The unvulcanized coating sheet laminating process 300 for stacking the unvulcanized coating sheet 4 and the unwoven rubber material made of the same material as the cover rubber 3 is impregnated with the nylon or polyester fiber woven fabric 2 to 5 of the conveyor belt. Double tear strength A reinforcing cloth laminating step 400 for laminating the formed reinforcing cloth 5 on the unvulcanized coating sheet 4 on the reinforcing surface 2A of the core layer 2, and the core layer 2, the unvulcanized coating sheet 4 and the reinforcing cloth 5 And a thermocompression bonding process 500 that integrates by thermocompression bonding, and the reinforcing cloth 5 is set so that the thickness of the reinforcing cloth 5 is not protruded from the surface of the cover rubber 3. Achieve the initial objectives.

以下、図面を参照して本発明の実施例を説明する。本発明の補強方法は、芯材層２の上下面にカバーゴム３が積層されたコンベヤベルト１の金属レーシングや金属プレート等の継手金具１０が装着されるベルト端部を補強する方法にある。すなわち、本発明補強方法は、カバー切除工程１００、バフ掛け工程２００、未加硫コーティングシート積層工程３００、補強布積層工程４００、熱圧着工程５００による（図１参照）。   Embodiments of the present invention will be described below with reference to the drawings. The reinforcing method of the present invention is a method of reinforcing a belt end portion to which a metal fitting of a conveyor belt 1 having a cover rubber 3 laminated on the upper and lower surfaces of the core material layer 2 and a metal plate such as a metal plate is mounted. That is, the reinforcing method of the present invention includes a cover cutting process 100, a buffing process 200, an unvulcanized coating sheet laminating process 300, a reinforcing cloth laminating process 400, and a thermocompression bonding process 500 (see FIG. 1).

カバー切除工程１００は、芯材層２の補強する面側に積層されているカバーゴム３を切除する工程である（図２（イ）参照）。この工程では、芯材層２が積層された（製品強度100〜1500N/mm程度の）コンベヤベルト１のカバーゴム３を、ベルト端部から幅３０〜５０mmほど切り離して芯材層２から剥離する。カバーゴム３の除去は、芯材層２の補強面２Ａとし、必要に応じて片面（図２参照）若しくは両面を対象とする（図図６参照）。   The cover cutting step 100 is a step of cutting the cover rubber 3 laminated on the reinforcing material side of the core material layer 2 (see FIG. 2 (A)). In this step, the cover rubber 3 of the conveyor belt 1 on which the core material layer 2 is laminated (product strength of about 100 to 1500 N / mm) is separated from the belt end portion by about 30 to 50 mm and peeled off from the core material layer 2. . The removal of the cover rubber 3 is performed on the reinforcing surface 2A of the core material layer 2, and one side (see FIG. 2) or both sides are targeted as necessary (see FIG. 6).

バフ掛け工程２００は、後述する未加硫コーティングシート４を接合する前処理工程である（図２（ロ）参照）。すなわち、カバーゴム３が切除された芯材層２の補強面２Ａから、該補強面２Ａに隣接してカバーゴム３の切断端面及び該端面に沿ったカバーゴム３の表面がわ端縁にかけてワイヤーブラシ等にてバフ掛けする。図示の芯材層２は一層状態であるが、複数枚の芯材が積層した芯材層２でも良い。   The buffing step 200 is a pretreatment step for joining the unvulcanized coating sheet 4 described later (see FIG. 2 (B)). That is, from the reinforcing surface 2A of the core material layer 2 from which the cover rubber 3 has been cut out, the cut end surface of the cover rubber 3 adjacent to the reinforcing surface 2A and the surface of the cover rubber 3 along the end surface are directed to the edge of the wire. Buff with a brush. The illustrated core material layer 2 is in a single layer state, but may be a core material layer 2 in which a plurality of core materials are laminated.

未加硫コーティングシート積層工程３００は、芯材層２の補強面２Ａからカバーゴム３のバフ掛け面３Ａにかけて未加硫コーティングシート４を重ねる工程である（図２（ハ）参照）。未加硫コーティングシート４材は、カバーゴム３と同じ材質の未加硫ゴム材が０．５mm厚のシート状に形成されたものを使用する。すなわち、コンベヤベルトで使用されるカバーゴム３の材質は、目的用途別に、対摩耗用、対衝撃用、中温耐熱用、高温耐熱用、超高温耐熱用、重耐油用、耐薬品用に分類されている。これらの分類ごとにカバーゴム３の材質が選択されるので、未加硫コーティングシート４材もこの材質と同じ材質のものを使用する。例えば、ＮＲ、ＳＢＲ、ブチルゴム等、目的別に各種の材質を使用する。また、この未加硫コーティングシート４を補強面２Ａに接着する際に、補強面２Ａに加硫用接着剤を塗布し該加硫用接着剤が乾燥後、該加硫コーティングシート４を接合することで、未加硫コーティングシート４の位置を正確に保つことができる。   The unvulcanized coating sheet lamination step 300 is a step of stacking the unvulcanized coating sheet 4 from the reinforcing surface 2A of the core material layer 2 to the buffing surface 3A of the cover rubber 3 (see FIG. 2 (C)). As the unvulcanized coating sheet 4 material, an unvulcanized rubber material made of the same material as that of the cover rubber 3 is formed into a sheet having a thickness of 0.5 mm. In other words, the material of the cover rubber 3 used in the conveyor belt is classified according to the intended use into wear resistance, impact resistance, medium temperature heat resistance, high temperature heat resistance, ultra high temperature heat resistance, heavy oil resistance, and chemical resistance. ing. Since the material of the cover rubber 3 is selected for each of these classifications, the uncured coating sheet 4 is also made of the same material as this material. For example, various materials such as NR, SBR, and butyl rubber are used depending on the purpose. Further, when the unvulcanized coating sheet 4 is bonded to the reinforcing surface 2A, a vulcanizing adhesive is applied to the reinforcing surface 2A, and after the vulcanizing adhesive is dried, the vulcanized coating sheet 4 is joined. Thus, the position of the unvulcanized coating sheet 4 can be accurately maintained.

補強布積層工程４００は、未加硫のゴムを含侵させると共に、除去したカバーゴム３より厚みが薄い補強布５を芯材層２の補強面２Ａの未加硫コーティングシート４上に積層する工程である（図２（ニ）参照）。この補強布５は、コンベヤベルトの２乃至５倍の引き裂き強度に形成された６６ナイロン、ポリエステル、アラミド等の繊維織布に、カバーゴム３と同じ材質の未加硫ゴムを含侵せしめ、切除したカバーゴム３の厚みより薄く調整した補強布５を使用する。こうすることで、この補強布５に連結した継手金具１０部分の厚みがカバーゴム３の厚みよりも突出しないようにしている（図４、図６参照）。補強布５の実施例として、例えば、０．５mm〜２．０mm厚の前記繊維織布に未加硫のゴムを含侵させてカバーゴム３の厚みより１mm〜２mm程度薄い補強布５を製造する。この補強布５の強度は、用途に合わせて５０〜１００N/mm、１６０、２００、２５０、３００、４００、５００、８００N/mmなどに形成する。   The reinforcing cloth laminating step 400 impregnates the unvulcanized rubber and laminates the reinforcing cloth 5 thinner than the removed cover rubber 3 on the unvulcanized coating sheet 4 on the reinforcing surface 2A of the core layer 2. This is a process (see FIG. 2D). This reinforcing cloth 5 is made by impregnating a fiber woven cloth made of 66 nylon, polyester, aramid or the like having a tear strength 2 to 5 times that of a conveyor belt with an unvulcanized rubber made of the same material as the cover rubber 3 and cutting it. The reinforcing cloth 5 adjusted to be thinner than the thickness of the cover rubber 3 is used. By doing so, the thickness of the joint fitting 10 connected to the reinforcing cloth 5 is prevented from protruding beyond the thickness of the cover rubber 3 (see FIGS. 4 and 6). As an example of the reinforcing cloth 5, for example, a non-vulcanized rubber is impregnated in the fiber woven cloth having a thickness of 0.5 mm to 2.0 mm to manufacture the reinforcing cloth 5 thinner than the thickness of the cover rubber 3 by about 1 mm to 2 mm. To do. The strength of the reinforcing cloth 5 is formed to 50 to 100 N / mm, 160, 200, 250, 300, 400, 500, 800 N / mm or the like according to the application.

熱圧着工程５００は、芯材層２と未加硫コーティングシート４と補強布５とを熱圧着して一体化する工程である（図２（ホ）参照）。この工程では、前記工程を経たベルト端部相互を付け合わせて熱プレス加硫機Ｑで熱圧着する（図３参照）。この熱プレス加硫機Ｑでは、圧力を０．８ＭＰａに加圧し、１６０℃の温度で１０分間加硫した後、８０℃まで冷却し、プレスアウトする。   The thermocompression bonding process 500 is a process in which the core material layer 2, the unvulcanized coating sheet 4, and the reinforcing cloth 5 are integrated by thermocompression bonding (see FIG. 2 (e)). In this step, the belt end portions that have undergone the above-described steps are bonded together and thermocompression bonded by a hot press vulcanizer Q (see FIG. 3). In this hot press vulcanizer Q, the pressure is increased to 0.8 MPa, vulcanized at a temperature of 160 ° C. for 10 minutes, cooled to 80 ° C., and pressed out.

この工程により、芯材層２の補強面２Ａからカバーゴム３の表面がわにかけて重ねた未加硫コーティングシート４が加硫され、カバーゴム３と補強布５との境界部分に充填される。カバーゴム３と補強布５との境界部分に段差が生じている場合は、この段差が解消される（図３（ロ）、図５（ロ）参照）。この後、付け合わせていたベルト端部相互を切り離し、このベルト端部に継手金具１０を装着してコンベヤベルト１をエンドレス状に連結する（図４、図６参照）。   By this step, the unvulcanized coating sheet 4 in which the surface of the cover rubber 3 is overlapped with the reinforcing surface 2A of the core material layer 2 is vulcanized, and the boundary portion between the cover rubber 3 and the reinforcing cloth 5 is filled. If there is a step at the boundary between the cover rubber 3 and the reinforcing cloth 5, this step is eliminated (see FIGS. 3 (b) and 5 (b)). Thereafter, the belt end portions that have been attached are separated from each other, and a joint metal fitting 10 is attached to the belt end portion to connect the conveyor belt 1 in an endless manner (see FIGS. 4 and 6).

本発明補強方法において、補強布５等で補強された側面に装着する継手金具１０はベルト本体の表面よりも突出しないが、補強されていない側面はカバーゴム３上に継手金具１０を装着するので、この継手金具１０はベルト本体の表面よりも突出することになる。そのため、熱圧着工程５００において、補強されていない側面のカバーゴム３の厚みを調整することができる（図３参照）。すなわち、補強布５を配した面の反対側面に位置するカバーゴム３がわに厚み調整板Ｐを設置する（図３（イ）参照）。次に熱プレス加硫機Ｑを圧着して継手装着面３Ａを形成する（図３（ロ）参照）。この継手装着面３Ａは、該継手装着面３Ａに装着した継手金具１０がベルト本体のカバーゴム３の表面より突出しないように設定するものである（図４参照）。   In the reinforcing method of the present invention, the joint fitting 10 attached to the side surface reinforced with the reinforcing cloth 5 or the like does not protrude from the surface of the belt body, but the joint metal fitting 10 is attached to the cover rubber 3 on the side surface not reinforced. The joint fitting 10 protrudes from the surface of the belt body. Therefore, in the thermocompression bonding process 500, the thickness of the side cover rubber 3 that is not reinforced can be adjusted (see FIG. 3). That is, the cover rubber 3 located on the side opposite to the surface on which the reinforcing cloth 5 is disposed installs the thickness adjusting plate P (see FIG. 3A). Next, the hot press vulcanizer Q is crimped to form the joint mounting surface 3A (see FIG. 3B). The joint mounting surface 3A is set so that the joint fitting 10 mounted on the joint mounting surface 3A does not protrude from the surface of the cover rubber 3 of the belt body (see FIG. 4).

一方、前記補強方法にて補強された本発明コンベヤベルトは、ベルト端部の芯材層２の表面がわから該芯材層２に隣接するカバーゴム３の表面がわ端縁にかけて積層された未加硫コーティングシート４層と、該未加硫コーティングシート４層を介して未加硫のゴムを含侵させた補強布５が芯材層２の上に積層された補強布５層とで補強されている。そして、芯材層２と未加硫コーティングシート４と補強布５とが熱圧着で一体化され、未加硫コーティングシート４の一部がカバーゴム３の表面側を覆うように形成されている（図３（ロ）、図５（ロ）参照）。   On the other hand, the conveyor belt of the present invention reinforced by the reinforcing method is not laminated in which the surface of the core material layer 2 at the belt end is laminated from the surface to the surface of the cover rubber 3 adjacent to the core material layer 2. Reinforced with 4 layers of vulcanized coating sheet and 5 layers of reinforcing fabric 5 in which unreinforced rubber impregnated with unvulcanized rubber is laminated on the core material layer 2 through the 4 layers of unvulcanized coating sheet Has been. The core material layer 2, the unvulcanized coating sheet 4 and the reinforcing cloth 5 are integrated by thermocompression bonding, and a part of the unvulcanized coating sheet 4 is formed so as to cover the surface side of the cover rubber 3. (See FIG. 3 (B) and FIG. 5 (B)).

このとき、未加硫コーティングシート４層と補強布５層とで補強されるベルト端部は、ベルト本体の片面のみが補強されるものであっても十分な強度を有する（図４参照）。一方、図６に示すベルト端部は、ベルト本体の両面を補強して連結したものである。いずれの場合でも、ベルト本体とベルト端部の補強部分の境界部分は滑らかな曲面状になり大きな段差が生じることはない。   At this time, the belt end portion reinforced by the four layers of the unvulcanized coating sheet and the five layers of the reinforcing cloth has sufficient strength even if only one side of the belt main body is reinforced (see FIG. 4). On the other hand, the belt end shown in FIG. 6 is formed by reinforcing and connecting both sides of the belt main body. In either case, the boundary portion between the belt main body and the reinforcing portion of the belt end portion is a smooth curved surface, and a large step does not occur.

尚、本発明のコンベヤベルトの構成は、図示例に限定されるものではなく、本発明の要旨を変更しない範囲での設計変更は自由に行えるものである。   In addition, the structure of the conveyor belt of this invention is not limited to the example of illustration, A design change in the range which does not change the summary of this invention can be performed freely.

本発明の補強方法を示すブロック図である。It is a block diagram which shows the reinforcement method of this invention. （イ）乃至（ホ）は、本発明補強方法の一実施例を示す工程図である。(A) thru | or (e) are process drawings which show one Example of this invention reinforcement method. （イ）、（ロ）は、本発明補強方法の熱圧着工程を示す概略図である。(A) and (B) are schematic views showing a thermocompression bonding step of the reinforcing method of the present invention. 図２に示すコンベヤベルトの連結状態を示す要部断面図である。It is principal part sectional drawing which shows the connection state of the conveyor belt shown in FIG. （イ）、（ロ）は、本発明補強方法の他の実施例を示す工程図である。(A), (b) is process drawing which shows the other Example of this invention reinforcement method. 図５に示すコンベヤベルトの連結端部を示す要部断面図である。It is principal part sectional drawing which shows the connection end part of the conveyor belt shown in FIG.

符号の説明Explanation of symbols

Ｐ 厚み調整板
Ｑ 熱プレス加硫機
１ コンベヤベルト
２ 芯材層
３ カバーゴム
３Ａ 継手装着面
４ 未加硫コーティングシート
５ 補強布
１００ カバー切除工程
２００ バフ掛け工程
３００ 未加硫コーティングシート積層工程
４００ 補強布積層工程
５００ 熱圧着工程 P Thickness adjustment plate Q Heat press vulcanizer 1 Conveyor belt 2 Core material layer 3 Cover rubber 3A Joint mounting surface 4 Unvulcanized coating sheet 5 Reinforcement cloth 100 Cover cutting process 200 Buffing process 300 Unvulcanized coating sheet lamination process 400 Reinforcement cloth lamination process 500 Thermocompression bonding process

Claims (6)

芯材層の上下面にカバーゴムが積層され、端部にエンドレス状に連結する継手金具が装着されるコンベヤベルトの補強方法において、芯材層の補強しようとする面側に積層されているカバーゴムを切除するカバー切除工程と、カバーゴムが切除された芯材層の補強面から、該補強面に隣接してカバーゴムの切断端面及び該端面に沿ったカバーゴムの表面がわ端縁にかけてバフ掛けするバフ掛け工程と、芯材層の補強面からカバーゴムのバフ掛け面にかけて未加硫コーティングシートを重ねる未加硫コーティングシート積層工程と、未加硫のゴムを含浸させた補強布を芯材層の補強面の未加硫コーティングシート上に積層する補強布積層工程と、芯材層と未加硫コーティングシートと補強布とを熱圧着して一体化する熱圧着工程とからなり、補強布の厚みを該補強布がわに装着した前記継手金具がカバーゴムの表面より突出しないように設定したことを特徴とするコンベヤベルトの補強方法。   Covers laminated on the surface side of the core material layer to be reinforced in the method of reinforcing a conveyor belt in which cover rubber is laminated on the upper and lower surfaces of the core material layer and end fittings are attached to end parts. Cover cutting process for cutting rubber, and from the reinforcing surface of the core material layer from which the cover rubber has been cut, the cut end surface of the cover rubber and the surface of the cover rubber along the end surface to the edge of the flange adjacent to the reinforcing surface. A buffing step for buffing, a non-vulcanized coating sheet laminating step for stacking unvulcanized coating sheets from the reinforcing surface of the core layer to the buffing surface of the cover rubber, and a reinforcing cloth impregnated with unvulcanized rubber It consists of a reinforcing cloth laminating step for laminating on the unvulcanized coating sheet of the reinforcing surface of the core material layer, and a thermocompression bonding step for integrating the core material layer, the unvulcanized coating sheet and the reinforcing cloth by thermocompression bonding. Supplement Reinforcing method of the conveyor belt, characterized in that the joint fitting that the thickness of the fabric reinforcing fabric attached crocodile are set so as not to protrude from the surface of the cover rubber. 前記熱圧着工程において、前記補強布を配した面の反対側面のカバーゴムに厚み調整板を圧着して継手装着面を形成し、該継手装着面がわに装着した前記継手金具が隣接するカバーゴムの表面より突出しないように設定する請求項１記載のコンベヤベルトの補強方法。   In the thermocompression bonding step, a thickness adjusting plate is pressure-bonded to a cover rubber on the side opposite to the surface on which the reinforcing cloth is arranged to form a joint mounting surface, and the joint mounting surface on which the joint mounting surface is attached is adjacent to the joint fitting The method for reinforcing a conveyor belt according to claim 1, wherein the method is set so as not to protrude from the surface of the rubber. 前記補強布は、ナイロン、ポリエステルの繊維織布に前記カバーゴムと同じ材質の未加硫ゴム材を含浸せしめコンベヤベルトの２乃至５倍の引き裂き強度に形成された補強布を使用する請求項１又は２記載のコンベヤベルトの補強方法。   2. The reinforcing cloth is made of a nylon or polyester fiber woven cloth impregnated with an unvulcanized rubber material made of the same material as the cover rubber and formed to have a tear strength 2 to 5 times that of a conveyor belt. Or the reinforcing method of the conveyor belt of 2. 前記未加硫コーティングシート積層工程において、未加硫コーティングシートは、前記カバーゴムと同じ材質の未加硫材が０．５mm厚のシート状に形成されたものを使用すると共に、前記芯材層の補強面に加硫用接着剤を塗布し該加硫用接着剤が乾燥後、該未加硫コーティングシートを接合する請求項１記載のコンベヤベルトの補強方法。   In the unvulcanized coating sheet laminating step, the unvulcanized coating sheet uses an unvulcanized material made of the same material as the cover rubber formed into a 0.5 mm thick sheet, and the core material layer 2. The method of reinforcing a conveyor belt according to claim 1, wherein a vulcanizing adhesive is applied to the reinforcing surface of the vulcanizing sheet, and the unvulcanized coating sheet is joined after the vulcanizing adhesive is dried. 芯材層の上下面にカバーゴムが積層されたコンベヤベルトにおいて、該コンベヤベルトをエンドレス状に連結する継手金具が装着されるベルト端部のカバーゴムが切除された跡の芯材層表面がわから該芯材層に隣接するカバーゴムの表面がわ端縁にかけて積層された未加硫コーティングシート層と、該未加硫コーティングシート層を介して未加硫のゴムを含侵させた補強布が芯材層の上に積層された補強布層と、からなり、芯材層と未加硫コーティングシートと補強布とが熱圧着で一体化されていると共に、未加硫コーティングシートの一部がカバーゴムの表面側を覆うように形成され、補強布の厚みを該補強布がわに装着した前記継手金具がカバーゴムの表面より突出しないように設定したことを特徴とするコンベヤベルトの接合部構造。   In a conveyor belt in which cover rubber is laminated on the upper and lower surfaces of the core material layer, the surface of the core material layer that has been cut off from the cover rubber at the end of the belt to which the fitting for connecting the conveyor belt in an endless manner is attached is known. An unvulcanized coating sheet layer in which the surface of the cover rubber adjacent to the core material layer is laminated over the edge of the flange, and a reinforcing cloth impregnated with unvulcanized rubber through the unvulcanized coating sheet layer. A reinforcing cloth layer laminated on the core material layer, and the core material layer, the unvulcanized coating sheet, and the reinforcing cloth are integrated by thermocompression bonding, and a part of the unvulcanized coating sheet is formed. A joint portion of a conveyor belt, which is formed so as to cover the surface side of the cover rubber, and the thickness of the reinforcing cloth is set so that the joint fitting to which the reinforcing cloth is attached does not protrude from the surface of the cover rubber Construction. 前記補強布を配した面の反対側面のカバーゴムに厚み調整板を圧着して継手装着面が形成され、該継手装着面がわに装着した前記継手金具が隣接するカバーゴムの表面より突出しないように継手装着面の厚みが設定された請求項５記載の補強コンベヤベルトの接合部構造。   A joint mounting surface is formed by crimping a thickness adjusting plate to the cover rubber on the side opposite to the surface on which the reinforcing cloth is arranged, and the joint mounting surface mounted on the side does not protrude from the surface of the adjacent cover rubber The joint structure of a reinforced conveyor belt according to claim 5, wherein the thickness of the joint mounting surface is set as described above.
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