JP2000301538A - Device for fabricating rubber crawler - Google Patents
Device for fabricating rubber crawlerInfo
- Publication number
- JP2000301538A JP2000301538A JP11585299A JP11585299A JP2000301538A JP 2000301538 A JP2000301538 A JP 2000301538A JP 11585299 A JP11585299 A JP 11585299A JP 11585299 A JP11585299 A JP 11585299A JP 2000301538 A JP2000301538 A JP 2000301538A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- reinforcing cord
- vulcanization
- cord
- crawler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＲＶ車等の高速雪
上車あるいは建設車両等に装着されて使用される無端状
のゴムクローラ製造装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless rubber crawler manufacturing apparatus which is used by being mounted on a high-speed snowmobile such as an RV vehicle or a construction vehicle.
【０００２】[0002]
【従来の技術】近年、レジャー用のＲＶ車における通常
の駆動車輪を取り外して、複数のスプロケットおよび転
輪からなる無限軌道駆動装置を装着して、雪上車等とし
て使用するケースが増大している。このような無限軌道
駆動装置には無端状のゴムベルト等から構成されるクロ
ーラが装着されるが、クローラのＲＶ車への装着に伴っ
て、走行速度の高速化に対応する必要が急務となってい
る。また、通常の雪上車等のみならず、騒音、振動等が
低減されるゴムクローラが装着されるようになってきた
建設車両等においても、クローラの高速化への対応が迫
られている。一般に、このような無限軌道駆動装置に装
着されるクローラは図６および図７に示したような方法
によって加硫、成型される。2. Description of the Related Art In recent years, there has been an increasing number of cases in which ordinary driving wheels of a leisure RV are removed, and an endless track driving device including a plurality of sprockets and rolling wheels is mounted and used as a snowmobile or the like. . A crawler composed of an endless rubber belt or the like is attached to such an endless track driving device, and it is urgently necessary to cope with an increase in traveling speed with the attachment of the crawler to an RV vehicle. I have. Further, in addition to ordinary snowmobiles and the like, construction vehicles and the like in which rubber crawlers that reduce noise, vibration, and the like are mounted are required to cope with high-speed crawlers. Generally, a crawler mounted on such an endless track driving device is vulcanized and molded by a method as shown in FIGS.
【０００３】図６に示したものは、基本的な製造方法で
あり、図６（Ａ）のような図示省略の補強コードを埋設
した帯状ゴム等からなるクローラ３１を、図６（Ｂ）に
示したように、上下の型（モールド）３３、３２にて挟
持するとともに、それらの上下をさらに外熱盤３４およ
び内熱盤３５によって挟持して加温することによりクロ
ーラ３１を加硫し、その後、図６（Ｃ）に示したよう
に、クローラ３１の食い違い状の両端部３１Ａ、３１Ｂ
を重合して、端部接合用の上下の型３３Ｔ、３２Ｔおよ
び内外熱盤３５Ｔ、３４Ｔによって両端部を加硫接合
し、無端状のクローラ製品を得る。FIG. 6 shows a basic manufacturing method. As shown in FIG. 6A, a crawler 31 made of a band-like rubber or the like in which a reinforcing cord (not shown) is embedded is attached to a crawler 31 shown in FIG. As shown in the figure, the crawler 31 is vulcanized by being sandwiched between upper and lower molds (molds) 33 and 32, and further heated and sandwiched between the upper and lower molds by an external heat plate 34 and an internal heat plate 35, Thereafter, as shown in FIG. 6C, the staggered ends 31A, 31B of the crawler 31 are formed.
Are polymerized, and both ends are vulcanized and joined by upper and lower molds 33T and 32T and inner and outer heating plates 35T and 34T for end joining to obtain an endless crawler product.
【０００４】図７に示したものは、送り加硫と称される
製造方法であり、比較的長尺のクローラを加硫する際に
用いられる。図７（Ａ）のような図示省略の補強コード
を埋設した長尺の帯状ゴム等からなるクローラ３１を、
図７（Ｂ）に示したように、比較的短い所定長さの上下
の型３３Ｔ、３２Ｔにて挟持するとともに、それらの上
下をさらに外熱盤３４Ｔおよび内熱盤３５Ｔによって挟
持して加温することによりクローラ３１の所定長さ部分
を加硫し、これを順次繰り返してクローラ３１の全長を
加硫した後、図７（Ｃ）に示したように、クローラ３１
の食い違い状の両端部３１Ａ、３１Ｂを重合して、上下
の型３３Ｔ、３２Ｔおよび内外熱盤３５Ｔ、３４Ｔによ
って両端部を加硫接合し、無端状のクローラ製品を得る
ものである。FIG. 7 shows a manufacturing method called feed vulcanization, which is used when vulcanizing a relatively long crawler. A crawler 31 made of a long band-like rubber or the like in which a reinforcing cord (not shown) is embedded as shown in FIG.
As shown in FIG. 7 (B), the upper and lower molds 33T and 32T having a relatively short length are sandwiched between the upper and lower molds 33T and 32T, and the upper and lower molds are further sandwiched by an outer heat plate 34T and an inner heat plate 35T to heat. After vulcanizing a predetermined length of the crawler 31 and sequentially repeating this to vulcanize the entire length of the crawler 31, as shown in FIG.
The end portions 31A and 31B of the staggered shape are polymerized, and both ends are vulcanized and joined by upper and lower dies 33T and 32T and inner and outer heating plates 35T and 34T to obtain an endless crawler product.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の製造方法では、加硫前にクローラの予備的な
成型を別途工程によって予め行って、その後に加硫工程
に投入されるため、クローラの加硫工程への搬入装置が
大がかりとなる他、製造工程に多大の時間を要してい
た。また、特に前記図６に示した加硫方法では、型およ
び熱盤が長大化して大きなスペースの設置場所を要する
他、端部のみの接合加硫工程をさらに要した。また、前
記図７に示した加硫方法では、型および熱盤は小型化さ
れたものの、所定長さ毎に加硫を数回から１０回程度繰
り返す必要があり、さらに多大の加硫時間を必要とする
上、加硫工程において前記と同様の端部のみの接合加硫
工程をさらに要した。しかも、これらの加硫による製造
方法では、補強コードを含めて帯状のクローラを両端部
を加硫して接合せねばならず、該接合部において補強コ
ードが重複されて厚くなって、クローラの円周上での均
一な諸特性を備えさせることが不可能となる他、長さ方
向に多数並設して埋設される補強コードの各端部同士の
連結処理も面倒な上、補強強度において連続性が断たれ
る虞れもあった。ましてや、円周上均質な補強強度を可
能にするスパイラル補強コードの埋設は不可能に近いも
のであった。このようなことから、従来の加硫による製
造方法にては車両の高速化に伴うクローラの高速での回
転に対応できなくなってきた。However, in such a conventional manufacturing method, preliminary molding of the crawler is performed in advance in a separate step before vulcanization, and then the crawler is charged into the vulcanization step. In addition to the large size of the equipment for carrying in the vulcanization process, the production process also required a great deal of time. In particular, in the vulcanization method shown in FIG. 6, the mold and the hot plate become longer, which requires an installation space of a large space, and further requires a joining vulcanization step for only the ends. Further, in the vulcanization method shown in FIG. 7, although the mold and the hot plate are miniaturized, it is necessary to repeat vulcanization several times to about 10 times for each predetermined length, which further increases the vulcanization time. In addition to the necessity, in the vulcanization step, the same joint vulcanization step of only the end as described above was further required. Moreover, in these vulcanizing production methods, both ends of the belt-shaped crawler including the reinforcing cord must be vulcanized and joined, and the reinforcing cord is overlapped and thickened at the joining portion, resulting in a crawler circle. In addition to making it impossible to provide uniform properties on the circumference, it is troublesome to connect each end of the reinforcing cords that are buried side by side in the length direction, and it is continuous in reinforcing strength There was also a possibility that the properties could be cut off. Furthermore, it is almost impossible to embed a spiral reinforcing cord that enables uniform circumferential reinforcing strength. For this reason, the conventional vulcanization-based manufacturing method cannot cope with the high-speed rotation of the crawler accompanying the speeding-up of the vehicle.
【０００６】そこで、出願人は、前記従来のゴムクロー
ラ製造方法における諸課題を解決すべく、比較的小さな
型の採用にて、無端状の補強コードの内外周にゴムを添
設して数次の加硫工程により、工程数少なくゴムクロー
ラを製造する技術を開発しているところであり、本発明
では、このような開発中の技術において、無端状の補強
コードの内外周にゴムを添設して数次の加硫工程によ
り、工程数少なくゴムクローラを製造する際に、ゴムの
補強コードへの正確な添設・加硫位置を確保して、円周
上、より均質な強度特性が得られるゴムクローラ製造装
置を提供することを目的とする。In order to solve the above-mentioned problems in the conventional rubber crawler manufacturing method, the applicant has adopted a comparatively small mold and attached rubber to the inner and outer peripheries of the endless reinforcing cord to obtain a number of orders. With the vulcanization process, a technology for manufacturing a rubber crawler is being developed with a small number of processes.In the present invention, in such a technology under development, rubber is added to the inner and outer circumferences of the endless reinforcing cord. By using several vulcanization processes, when manufacturing rubber crawlers with a small number of processes, rubber can be secured to the correct attachment and vulcanization position of the rubber to the reinforcing cord, and a more uniform strength characteristic on the circumference can be obtained. It is an object to provide a crawler manufacturing device.
【０００７】[0007]
【課題を解決するための手段】このため本発明は、無端
リング状の補強コードの内周側と接地側とに添設したゴ
ムを型により加圧加温して加硫するゴムクローラ製造装
置であって、前記無端リング状の補強コードの内周側に
配置した中型と該補強コードの外周側の少なくとも上部
にそれぞれ配置した上型との間にて、補強コードの所定
周長分の内周側ゴムおよび接地側ゴムを加硫成型するゴ
ムクローラ製造装置において、前記無端リング状の補強
コードを一対の回転自在なテンションプーリ間に緊張・
張設したことを特徴とするものである。また本発明は、
前記加硫すべきゴムの所定周長分の両端位置を画定する
ために補強コードに付された目印を適正位置に位置決め
するために、前記テンションプーリを回転して緊張され
た補強コードを移動調整するように構成したことを特徴
とするものである。また本発明は、前記補強コードに付
された目印の位置をセンサにて読み取り、前記テンショ
ンプーリを回転させて、これらの目印の位置を自動的に
適正位置に位置決めするように構成したことを特徴とす
るもので、これらを課題解決のための手段とするもので
ある。SUMMARY OF THE INVENTION Accordingly, the present invention provides a rubber crawler manufacturing apparatus for vulcanizing a rubber attached to an inner peripheral side and a ground side of an endless ring-shaped reinforcing cord by pressurizing and heating the rubber with a mold. Between the middle die disposed on the inner peripheral side of the endless ring-shaped reinforcing cord and the upper die disposed at least on the outer peripheral side of the reinforcing cord at a predetermined peripheral length of the reinforcing cord. In a rubber crawler manufacturing apparatus for vulcanizing and molding a peripheral rubber and a ground rubber, the endless ring-shaped reinforcing cord is tensioned between a pair of rotatable tension pulleys.
It is characterized by being stretched. The present invention also provides
The tension pulley is rotated to adjust the tensioned cord to rotate the tension pulley in order to position a mark attached to the reinforcement cord at an appropriate position in order to define both end positions for a predetermined circumferential length of the rubber to be vulcanized. It is characterized by having been constituted so that. Further, the present invention is characterized in that the position of the mark attached to the reinforcing cord is read by a sensor, and the tension pulley is rotated so that the position of the mark is automatically positioned at an appropriate position. These are the means for solving the problems.
【０００８】[0008]
【実施の形態】以下本発明の実施の形態を図面に基づい
て説明する。図１〜図４は本発明のゴムクローラ製造装
置の第１実施の形態を示す図で、図１は補強コードの内
外周にゴムを添設・加硫する状態の１段式加硫の概略説
明図、図２は同じく２段式加硫の概略説明図、図３は中
型の詳細図、図４は２段式加硫の加硫成型工程を示す概
略図である。本発明のゴムクローラ製造装置の特徴的な
点は、図１（Ａ）に示すように、１本の線状体をスパイ
ラル状に多数回巻き付けて無端リング状に形成した補強
コード４（ゴム引きされたものであっても、むき出しの
ものであってもよい。また、場合によっては、従来の多
数の並列線状体を端部にて接合して無端リング状にした
ものも採用可能である。）の、内周側に配置した中型３
と該補強コード４の外周側の少なくとも上部にそれぞれ
配置した上型１との間にて、補強コード４の所定周長分
の内周側ゴム６Ａおよび接地側ゴム５Ａを加硫成型する
ゴムクローラ製造装置において、前記無端リング状の補
強コード４を一対の回転自在なテンションプーリ８Ａ、
８Ｂ間に緊張・張設したことにある。図１（Ｂ）は加硫
部の上型と中型間の横断面図であり、１段式加硫方式に
よる加硫状態を示す。Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are views showing a first embodiment of a rubber crawler manufacturing apparatus according to the present invention, and FIG. 1 is a schematic diagram of a one-stage vulcanization in a state in which rubber is attached and vulcanized on the inner and outer circumferences of a reinforcing cord. FIG. 2 is a schematic explanatory view of the two-stage vulcanization, FIG. 3 is a detailed view of the medium-sized vulcanization, and FIG. 4 is a schematic view showing a vulcanization molding process of the two-stage vulcanization. A characteristic of the rubber crawler manufacturing apparatus of the present invention is that, as shown in FIG. 1 (A), a reinforcing cord 4 (rubberized) in which one linear body is spirally wound many times to form an endless ring. In some cases, an endless ring formed by joining a number of conventional parallel linear bodies at their ends may be employed. ), The middle size 3 arranged on the inner peripheral side
A rubber crawler that vulcanizes and molds inner circumferential rubber 6A and ground rubber 5A for a predetermined circumferential length of the reinforcing cord 4 between the upper die 1 and the upper mold 1 that is disposed at least on the outer circumferential side of the reinforcing cord 4. In the manufacturing apparatus, the endless ring-shaped reinforcing cord 4 is connected to a pair of rotatable tension pulleys 8A,
I was nervous during the 8B. FIG. 1B is a cross-sectional view between the upper mold and the middle mold of the vulcanizing section, showing a vulcanized state by a one-stage vulcanization method.
【０００９】図２（Ａ）は、２段式加硫方式による加硫
状態を示すもので、この例では、前記無端リング状の補
強コード４の内周側に配置した中型３と該補強コード４
の外周側の上下にそれぞれ配置した上型１および下型２
との間にて、後述するように、補強コード４の略半周長
分の内周側ゴム６Ａ、６Ｂおよび接地側ゴム５Ａ、５Ｂ
を同時に加硫成型する。本例でも、前記無端リング状の
補強コード４は一対の回転自在なテンションプーリ８
Ａ、８Ｂ間にて緊張・張設される。FIG. 2A shows a vulcanized state by a two-stage vulcanizing method. In this example, a middle die 3 disposed on the inner peripheral side of the endless ring-shaped reinforcing cord 4 and the reinforcing cord are shown. 4
Upper mold 1 and lower mold 2 respectively arranged on the upper and lower sides of the outer periphery of
As will be described later, the inner peripheral rubbers 6A and 6B and the ground rubbers 5A and 5B for approximately half the circumference of the reinforcing cord 4 are provided.
Are simultaneously vulcanized. Also in this example, the endless ring-shaped reinforcing cord 4 is a pair of rotatable tension pulleys 8.
A tension is stretched between A and 8B.
【００１０】図１の１段式加硫方式の場合も、図２の２
段式加硫方式の場合も、前記加硫すべきゴム５Ａ、６Ａ
および５Ｂ、６Ｂの所定周長分の両端位置を画定するた
めに補強コードに付された目印Ａ１、Ａ２およびＢ１、
Ｂ２を適正位置に位置決めするために、前記テンション
プーリ８Ａ、８Ｂを回転して緊張された補強コード４を
移動調整するように構成したことを特徴とするものであ
る。図２（Ｂ）に示すように、１段式加硫方式の場合、
後述するところの第１次加硫工程で加硫される例えば目
印Ａ１、Ａ２で画定される所定周長分Ｌ１と、第２次加
硫工程で加硫される目印Ａ２、Ｂ２で画定される所定周
長分Ｌ２とが所定比率となるように、さらに、第３次加
硫工程で加硫される所定周長分Ｌ１’が所定周長分Ｌ１
と等しく、第４次加硫工程で加硫される所定周長分Ｌ
２’の所定周長分Ｌ１’に対する比率および所定周長分
Ｌ２と等しくなるようにテンションプーリ８Ａ、８Ｂ間
の距離およびテンションプーリ８Ａ、８Ｂの回転により
目印Ａ１、Ａ２、Ｂ１、Ｂ２の位置が調整される。In the case of the one-stage vulcanization system shown in FIG.
In the case of the step-type vulcanization method, the rubbers 5A and 6A to be vulcanized are also used.
And marks A1, A2 and B1, attached to the reinforcing cord to define both end positions for a predetermined circumferential length of 5B and 6B.
In order to position B2 at an appropriate position, the tension pulleys 8A and 8B are rotated to adjust and move the tensioned reinforcing cord 4. As shown in FIG. 2 (B), in the case of the one-stage vulcanization method,
For example, a predetermined circumferential length L1 defined by the marks A1 and A2 vulcanized in the primary vulcanization step described later, and defined by marks A2 and B2 vulcanized in the secondary vulcanization step. The predetermined circumference L1 ′ vulcanized in the third vulcanization step is further reduced by the predetermined circumference L1 so that the predetermined circumference L2 and the predetermined circumference L2 have a predetermined ratio.
And a predetermined circumference L vulcanized in the fourth vulcanization step
The distance between the tension pulleys 8A and 8B and the rotation of the tension pulleys 8A and 8B make the positions of the marks A1, A2, B1 and B2 equal to the ratio of 2 'to the predetermined circumference L1' and the predetermined circumference L2. Adjusted.
【００１１】また２段式加硫方式の場合、第１次加硫工
程で加硫される例えば目印Ａ１、Ａ２で画定される所定
周長分Ｌ１および目印Ｂ１、Ｂ２で画定される所定周長
分Ｌ１’とが等しくかつ後述する第２次加硫工程で加硫
される目印Ａ２、Ｂ２で画定される所定周長分Ｌ２およ
び目印Ｂ１、Ａ２で画定される所定周長分Ｌ２’とが等
しくさらにＬ１とＬ２の比率およびＬ１’とＬ２’の比
率が所定比率となるようにテンションプーリ８Ａ、８Ｂ
間の距離およびテンションプーリ８Ａ、８Ｂの回転によ
り目印Ａ１、Ａ２、Ｂ１、Ｂ２の位置が調整される。図
示しての詳述は省略するが、補強コード４に対するゴム
５、６の添設位置を適正にするためには、補強コード４
に付された目印を、フォトカプラ等の照度センサによる
画像読取りにより、テンションプーリを回転させて、こ
れらの目印の位置を自動的に適正位置に位置決めするよ
うに構成される。In the case of the two-stage vulcanization method, for example, a predetermined circumference L1 defined by the marks A1 and A2 and a predetermined circumference defined by the marks B1 and B2 to be vulcanized in the first vulcanization step. The predetermined circumference L2 defined by the marks A2 and B2 and the predetermined circumference L2 ′ defined by the marks B1 and A2, which are equal to each other and are vulcanized in a secondary vulcanization step described later, are equal to each other. Equally, the tension pulleys 8A and 8B are set so that the ratio between L1 and L2 and the ratio between L1 'and L2' become predetermined ratios.
The positions of the marks A1, A2, B1, B2 are adjusted by the distance between them and the rotation of the tension pulleys 8A, 8B. Although not shown in the drawings, the rubber cords 5 and 6 must be attached to the reinforcing cord 4 in a proper manner.
By reading an image of the mark attached to the mark with an illuminance sensor such as a photocoupler, the tension pulley is rotated to automatically position the mark at an appropriate position.
【００１２】図３は中型の詳細例図であり、中型３の中
心部に配設されたテンションシリンダ７等により前後方
向（図面左右）に進退する前部テンションプーリ８Ａと
後部テンションプーリ８Ｂとが接続されたものである。
図３（Ａ）には、中型３と前後のテンションプーリ８
Ａ、８Ｂ間にわたって補強コード４が緊張・張設された
状態が示されている。なお、図３（Ａ）（Ｂ）における
符号１１、１２は、中型３の前後の端部に配設されたウ
ォータジャケット等の冷却手段で、第１次加硫工程時に
加硫されるゴム部分の接続縁部に非加熱による半加硫部
分を残しておいて、第２次加硫工程の加硫時にゴム部分
の加硫接続を強固に行えるようにするものである。FIG. 3 is a detailed example view of the middle sized die. A front tension pulley 8A and a rear tension pulley 8B which move forward and backward (left and right in the drawing) by a tension cylinder 7 or the like disposed at the center of the middle sized die 3 are shown. Connected.
FIG. 3A shows the middle die 3 and the front and rear tension pulleys 8.
A state in which the reinforcing cord 4 is stretched and stretched between A and 8B is shown. Reference numerals 11 and 12 in FIGS. 3 (A) and 3 (B) denote cooling means such as a water jacket disposed at the front and rear ends of the middle die 3, and a rubber portion vulcanized in the first vulcanization step. A semi-vulcanized portion by non-heating is left at the connection edge of the rubber member so that the rubber portion can be firmly vulcanized and connected at the time of vulcanization in the second vulcanization step.
【００１３】次に、２段式加硫方式の例によって加硫工
程を説明する。図４（Ａ）に示すように、無端リング状
に形成された補強コード４の内周側と接地側とに添設し
たゴム６、５を型１、２および３により加圧加温して加
硫するもので、前記無端リング状の補強コード４の内周
側に配置した中型３と該補強コード４の外周側の上下に
それぞれ配置した上型１および下型２との間にて、図４
（Ｂ）に示したように、補強コード４の略半周長分の内
周側ゴム６Ａ、６Ｂおよび接地側ゴム５Ａ、５Ｂを同時
に加硫成型する第１次加硫工程と、該工程に続いて、図
４（Ｃ）に示すようにして、加硫した部分を略半周長分
送り出し、次いで、図４（Ｄ）に示すように、同様にし
て、前記無端リング状の補強コード４の内周側にセット
した内周側ゴム６Ｃ、６Ｄと該補強コード４の外周側に
セットした接地側ゴム５Ｃ、５Ｄとを、上中下型１、
３、２によって同時に加硫して残りの略半周長分を加硫
成型する第２次加硫工程が行われる。本発明では、前述
したように、第１次加硫工程に当たって、補強コード４
の内外周に添設されるゴム５、６の加硫位置を表示する
目印を、一対の回転自在なテンションプーリ間に緊張・
張設された補強コード４の移動調整によって適正に位置
させることが可能となり、第１次および第２次加硫工程
間におけるゴムの接続部の接続寸法精度等を適正なもの
とし、特に接続部での高い均質性を確保することが可能
となる。Next, the vulcanization step will be described with reference to an example of a two-stage vulcanization system. As shown in FIG. 4 (A), rubbers 6 and 5 attached to the inner peripheral side and the ground side of the reinforcing cord 4 formed in an endless ring shape are pressurized and heated by the molds 1, 2 and 3. Between the middle mold 3 disposed on the inner peripheral side of the endless ring-shaped reinforcing cord 4 and the upper mold 1 and the lower mold 2 disposed on the outer peripheral side of the reinforcing cord 4 respectively, FIG.
As shown in (B), a first vulcanizing step of simultaneously vulcanizing and molding the inner peripheral rubbers 6A and 6B and the ground rubbers 5A and 5B for approximately a half circumferential length of the reinforcing cord 4, and subsequent to this step, Then, as shown in FIG. 4 (C), the vulcanized portion is sent out for substantially a half circumference, and then, as shown in FIG. 4 (D), similarly, the endless ring-shaped reinforcing cord 4 is formed. The inner rubber 6C, 6D set on the peripheral side and the grounding rubber 5C, 5D set on the outer peripheral side of the reinforcing cord 4,
A second vulcanization step of simultaneously vulcanizing by 3 and 2 and vulcanizing and molding the remaining approximately half circumference is performed. In the present invention, as described above, in the first vulcanization step, the reinforcing cord 4
A mark indicating the vulcanization position of the rubbers 5 and 6 attached to the inner and outer peripheries is tensioned between a pair of rotatable tension pulleys.
It is possible to properly position the tensioned reinforcing cord 4 by adjusting the movement thereof, and to make the connection dimensional accuracy and the like of the rubber connecting portion between the first and second vulcanization steps appropriate, and particularly to make the connecting portion accurate. High homogeneity can be ensured.
【００１４】このとき、好ましくは、前記第１次加硫工
程における加硫周長（内周側ゴム６Ａ、６Ｂおよび接地
側ゴム５Ａ、５Ｂにより構成されるクローラ部分の周
長）を、第２次加硫工程における加硫周長（内周側ゴム
６Ｃ、６Ｄおよび接地側ゴム５Ｃ、５Ｄにより構成され
るクローラ部分の周長）よりも大とされる。図４の例で
は、第１次加硫工程における加硫周長と第２次加硫工程
における加硫周長とが略等しいものが示されているが、
第１次加硫工程における加硫周長を大とする場合でも、
第２次加硫工程の際に加硫周長の差による型内でのゴム
の重複セット部分を適切に冷却手段等によって温度制御
等を行うことにより、同一の上中下型を使用しても接続
部の二重加硫等による弊害を簡単に排除することができ
る。なお、第１次加硫工程と第２次加硫工程により形成
されたゴム接合部は、好ましくは図５（Ｅ）に例示する
ように、雌雄の楔係合により接合されるような形状に構
成される。この例では、第１次加硫工程によるゴム接合
部の接続縁部を雄楔形状として該接続縁部に非加熱によ
る半加硫部分を残すために、各上型１と中型３とにウォ
ータジャケット１１−１、１１−３等の冷却手段を配設
したものである。At this time, it is preferable that the vulcanization circumference (the circumference of the crawler portion composed of the inner circumference rubbers 6A and 6B and the ground rubbers 5A and 5B) in the first vulcanization step is set to the second circumference. The vulcanization circumference in the next vulcanization step (the circumference of the crawler portion composed of the inner circumference rubbers 6C and 6D and the ground rubbers 5C and 5D) is made larger. In the example of FIG. 4, the vulcanization circumference in the first vulcanization step is substantially equal to the vulcanization circumference in the second vulcanization step.
Even when the vulcanization circumference in the first vulcanization step is large,
In the second vulcanization step, the overlapping set portion of rubber in the mold due to the difference in vulcanization circumference is appropriately temperature-controlled by cooling means or the like, so that the same upper, middle and lower molds are used. In addition, adverse effects due to double vulcanization of the connection portion can be easily eliminated. The rubber joint formed by the first vulcanization step and the second vulcanization step preferably has a shape that is joined by male and female wedge engagement as illustrated in FIG. 5 (E). Be composed. In this example, in order to leave the semi-vulcanized part by non-heating at the connecting edge of the rubber joining part in the first vulcanization step in the form of a male wedge, water is applied to each of the upper mold 1 and the middle mold 3. This is provided with cooling means such as jackets 11-1 and 11-3.
【００１５】図５は第２実施の形態を示すもので、本実
施の形態では、平面図である図５（Ａ）に示されるよう
に、比較的広幅のゴムクローラを成型する場合に用いら
れ、中型３から前後に伸縮自在に配設されるテンション
プーリは左右一対ずつ、前部左右テンションプーリ８Ａ
１、８Ａ２、後部左右テンションプーリ８Ｂ１、８Ｂ２
の都合４個が設けられるものである。これにより、広幅
のゴムクローラであっても、補強コード４各部におい
て、該補強コード４に対するゴム５、６の添設位置を適
正に調整することができ、換言すればゴム５、６内に適
正に補強コード４を埋設して、均一で高品質なゴムクロ
ーラを製造することができる。FIG. 5 shows a second embodiment. In this embodiment, as shown in FIG. 5A which is a plan view, this embodiment is used for molding a relatively wide rubber crawler. The left and right tension pulleys 8A are arranged in a pair on the left and right from the middle die 3 so as to be able to expand and contract back and forth.
1, 8A2, rear left and right tension pulleys 8B1, 8B2
Are provided. Thus, even in the case of a wide rubber crawler, it is possible to appropriately adjust the positions of the rubbers 5 and 6 attached to the reinforcing cords 4 at the respective portions of the reinforcing cords 4, in other words, to properly fit the rubbers 5 and 6 within the rubbers 5 and 6. In this case, a uniform and high-quality rubber crawler can be manufactured by embedding the reinforcing cord 4.
【００１６】図示は省略されるが、図３および図５に示
された型については、上型１および下型２は同一形状を
なし、これら各上型１および下型２の内側には周方向に
所定間隔にて多数のラグ形成溝が刻設され、また、中型
３の上下中央に沿って多数の駆動突起形成溝が刻設され
ている。図５（Ｄ）に示すように、床面等に固定された
下部加硫台１０の上に下型２が配設され、該下部加硫台
１０に対して上下動する上部加硫台９の下に上型１が配
設される。一方、中型３を上型１と下型２との間の適切
な位置に配置させるように構成され、前記上部加硫台９
および下部加硫台１０には加温装置が設けられており、
下部加硫台１０に対して上部加硫台９を近接して加圧す
ることにより、これら上中下の型１、２、３の間におい
て、補強コード４を埋設するごとく内周側ゴム６と接地
側ゴム５とが加硫成型される。Although not shown, the upper mold 1 and the lower mold 2 have the same shape in the molds shown in FIGS. 3 and 5, and the upper mold 1 and the lower mold 2 have a peripheral shape inside. A large number of lug forming grooves are formed at predetermined intervals in the direction, and a large number of drive protrusion forming grooves are formed along the upper and lower centers of the middle die 3. As shown in FIG. 5D, the lower mold 2 is disposed on a lower vulcanization table 10 fixed to a floor or the like, and the upper vulcanization table 9 that moves up and down with respect to the lower vulcanization table 10. The upper die 1 is disposed below the upper die. On the other hand, the middle mold 3 is arranged at an appropriate position between the upper mold 1 and the lower mold 2, and
And the lower vulcanizing table 10 is provided with a heating device,
By pressing the upper vulcanization table 9 close to the lower vulcanization table 10, the inner peripheral rubber 6 and the inner peripheral rubber 6 are buried between the upper, middle and lower dies 1, 2, 3 as if the reinforcing cord 4 is embedded. The rubber 5 on the ground side is vulcanized and molded.
【００１７】前記図４（Ａ）および図４（Ｂ）の第１次
加硫工程を終了した後に、上下型１、２および中型３は
ゴムクローラから離型され、図４（Ｃ）の第２次加硫工
程に移行する。その際のゴムクローラ半製品の周方向へ
の繰出し作業は、前後のテンションプーリ８Ａ、８Ｂの
回転によって容易に行うことができる。また、前記前後
のテンションプーリ８Ａ、８Ｂの回転により、第１次加
硫工程による半製品を含めた補強コード４を第２次加硫
工程での適正位置にセットした後に、第１次加硫工程と
同様にして第２次加硫工程が行われる。After the first vulcanization step shown in FIGS. 4A and 4B is completed, the upper and lower dies 1, 2 and the middle mold 3 are released from the rubber crawler, and the first and second dies shown in FIG. Move to the secondary vulcanization step. At this time, the operation of feeding the semi-finished rubber track in the circumferential direction can be easily performed by rotating the front and rear tension pulleys 8A and 8B. Further, the rotation of the front and rear tension pulleys 8A and 8B causes the reinforcing cord 4 including the semi-finished product in the primary vulcanization step to be set at an appropriate position in the secondary vulcanization step. The second vulcanization step is performed in the same manner as the step.
【００１８】以上、本発明の実施の形態について詳述し
たが、本発明の趣旨の範囲内で、上型、下型および中型
の形状すなわちゴムクローラの形状（芯金埋設形式のも
のであれば中型における駆動突起形成溝を複数列として
該溝に各芯金の突起を装着して加硫する等）、補強コー
ドの形式（スパイラル巻付けによる無端状のもの、平行
コードによる接続部を有するもの、バイアスコードを有
するもの、それらをゴム引きしたもの等）、形状、補強
コードにおける目印の検出形態、テンションプーリの形
状およびその回転駆動形式、中型とテンションプーリと
の関連構成、テンションプーリの伸縮形態、１次加硫工
程におけるゴム部分と第２次加硫工程におけるゴム部分
との接続部の接続形状およびその接合加硫形態、接続部
における冷却手段の形態等については適宜選定すること
ができる。Although the embodiments of the present invention have been described in detail above, the shapes of the upper, lower, and middle dies, that is, the shapes of the rubber crawlers (for a core-bar-embedded type) are within the scope of the present invention. Drive projection forming grooves in a medium-sized die are provided in a plurality of rows, and the protrusions of the respective cores are mounted in the grooves and vulcanized, etc., and the type of reinforcing cord (endless shape by spiral winding, connecting portion with parallel cord) , Bias cords, rubberized cords, etc.), shape, form of detection of marks on reinforcing cords, shape of tension pulley and its rotational drive type, related configuration between medium size and tension pulley, extension and contraction of tension pulley Connection shape of the connecting portion between the rubber portion in the primary vulcanizing step and the rubber portion in the secondary vulcanizing step, the bonding vulcanization form thereof, and cooling means at the connecting portion The forms and the like can be appropriately selected.
【００１９】[0019]
【発明の効果】以上、詳細に述べたように、本発明によ
れば、無端リング状の補強コードの内周側と接地側とに
添設したゴムを型により加圧加温して加硫するゴムクロ
ーラ製造装置であって、前記無端リング状の補強コード
の内周側に配置した中型と該補強コードの外周側の少な
くとも上部にそれぞれ配置した上型との間にて、補強コ
ードの所定周長分の内周側ゴムおよび接地側ゴムを加硫
成型するゴムクローラ製造装置において、前記無端リン
グ状の補強コードを一対の回転自在なテンションプーリ
間に緊張・張設したことにより、加硫工程に当たって、
補強コードの内外周に添設される未加硫ゴムの加硫位置
を表示する目印を、一対の回転自在なテンションプーリ
間に緊張・張設された補強コードの移動調整によって適
正に位置させることが可能となり、数次の加硫工程間に
おけるゴムの接続部の接続寸法精度等を適正なものと
し、特に接続部での高い均質性を確保することが可能と
なる。As described above in detail, according to the present invention, the rubber attached to the inner peripheral side and the ground side of the endless ring-shaped reinforcing cord is pressurized and heated by a mold to vulcanize. A rubber crawler manufacturing apparatus, wherein a predetermined length of a reinforcing cord is provided between a middle die disposed on an inner peripheral side of the endless ring-shaped reinforcing cord and an upper die disposed at least on an outer peripheral side of the reinforcing cord. In a rubber crawler manufacturing apparatus for vulcanizing and molding the inner circumferential rubber and the ground rubber for the circumferential length, the endless ring-shaped reinforcing cord is tensioned and stretched between a pair of rotatable tension pulleys, thereby performing vulcanization. In the process,
The mark indicating the vulcanized position of the unvulcanized rubber attached to the inner and outer peripheries of the reinforcing cord should be properly positioned by adjusting the movement of the reinforcing cord tensioned and stretched between the pair of rotatable tension pulleys. This makes it possible to make the connection dimensional accuracy of the rubber connection between the several vulcanization steps appropriate, and to secure high homogeneity particularly at the connection.
【００２０】また、前記補強コードに付された目印の位
置をセンサにて読み取り、前記テンションプーリを回転
させて、これらの目印の位置を自動的に適正位置に位置
決めするように構成した場合には、目印の位置をセンサ
にて読み取って自動的にテンションプーリを回転させて
補強コードに対するゴムの添設位置を自動的に適正なも
のとすることを可能にする。かくして本発明によれば、
無端状の補強コードの内外周にゴムを添設して数次の加
硫工程により、工程数少なくゴムクローラを製造する際
に、ゴムの補強コードへの正確な添設・加硫位置を確保
して、円周上、より均質な強度特性が得られるゴムクロ
ーラ製造装置が提供される。In the case where the position of the mark attached to the reinforcing cord is read by a sensor and the tension pulley is rotated, the position of the mark is automatically positioned at an appropriate position. In addition, the position of the mark is read by the sensor and the tension pulley is automatically rotated, so that the position where the rubber is attached to the reinforcing cord can be automatically made appropriate. Thus, according to the present invention,
Rubber is attached to the inner and outer circumferences of the endless reinforcing cord, and by performing several vulcanization steps, when manufacturing a rubber crawler with a small number of steps, secure the accurate attachment and vulcanization position of the rubber to the reinforcing cord. Thus, there is provided a rubber crawler manufacturing apparatus capable of obtaining circumferentially more uniform strength characteristics.
【図１】本発明のゴムクローラ製造装置の第１実施の形
態を示す図で、補強コードの内外周にゴムを添設・加硫
する状態の１段式加硫の概略説明図である。FIG. 1 is a view showing a first embodiment of a rubber crawler manufacturing apparatus according to the present invention, and is a schematic explanatory view of a one-stage vulcanization in a state in which rubber is attached and vulcanized on the inner and outer circumferences of a reinforcing cord.
【図２】同、２段式加硫の概略説明図である。FIG. 2 is a schematic explanatory view of the same two-stage vulcanization.
【図３】同、中型の詳細図である。FIG. 3 is a detailed view of the same medium-size machine.
【図４】同、２段式加硫の加硫成型工程を示す概略図で
ある。FIG. 4 is a schematic view showing a vulcanization molding step of the same two-stage vulcanization.
【図５】本発明のゴムクローラ製造装置の第２実施の形
態を示す図で、比較的広幅のゴムクローラを成型する場
合の説明図である。FIG. 5 is a view showing a second embodiment of the rubber crawler manufacturing apparatus of the present invention, and is an explanatory diagram in the case of molding a relatively wide rubber crawler.
【図６】ゴムクローラ製造方法の加硫成型工程を示す第
１従来例の概略図である。FIG. 6 is a schematic view of a first conventional example showing a vulcanization molding step of a rubber crawler manufacturing method.
【図７】ゴムクローラ製造方法の加硫成型工程を示す第
２従来例の概略図である。FIG. 7 is a schematic view of a second conventional example showing a vulcanization molding step of the rubber crawler manufacturing method.
１ 上型 ２ 下型 ３ 中型 ４ 補強コード ５ 接地側ゴム ５Ａ、５Ｃ 上部接地側ゴム ５Ｂ、５Ｄ 下部接地側ゴム ６ 内周側ゴム ６Ａ、６Ｃ 上部内周側ゴム ６Ｂ、６Ｄ 下部内周側ゴム ７ テンションシリンダ ８ テンションプーリ ８Ａ 前部テンションプーリ ８Ｂ 後部テンションプーリ ９ 上部加硫台 １０ 下部加硫台 １１ 前部ウォータジャケット（冷却手段） １２ 後部ウォータジャケット（冷却手段） Ａ１、Ａ２ 目印 Ｂ１、Ｂ２ 目印 Ｌ１、Ｌ２ 所定周長 DESCRIPTION OF SYMBOLS 1 Upper mold 2 Lower mold 3 Middle mold 4 Reinforcement cord 5 Grounding rubber 5A, 5C Upper grounding rubber 5B, 5D Lower grounding rubber 6 Inner circumference rubber 6A, 6C Upper inner circumference rubber 6B, 6D Lower inner circumference rubber 7 Tension cylinder 8 Tension pulley 8A Front tension pulley 8B Rear tension pulley 9 Upper vulcanization table 10 Lower vulcanization table 11 Front water jacket (cooling means) 12 Rear water jacket (cooling means) A1, A2 Mark B1, B2 Mark L1, L2 Predetermined circumference
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２９Ｋ 105:24 Ｂ２９Ｌ 31:32 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B29K 105: 24 B29L 31:32
Claims (3)
地側とに添設したゴムを型により加圧加温して加硫する
ゴムクローラ製造装置であって、前記無端リング状の補
強コードの内周側に配置した中型と該補強コードの外周
側の少なくとも上部にそれぞれ配置した上型との間に
て、補強コードの所定周長分の内周側ゴムおよび接地側
ゴムを加硫成型するゴムクローラ製造装置において、前
記無端リング状の補強コードを一対の回転自在なテンシ
ョンプーリ間に緊張・張設したことを特徴とするゴムク
ローラ製造装置。1. A rubber crawler manufacturing apparatus for vulcanizing a rubber attached to an inner peripheral side and a ground side of an endless ring-shaped reinforcing cord by pressurizing and heating the rubber by a mold, wherein the endless ring-shaped reinforcement is provided. Between the middle mold disposed on the inner peripheral side of the cord and the upper mold disposed on at least the upper part on the outer peripheral side of the reinforcing cord, the inner peripheral rubber and the ground rubber for a predetermined peripheral length of the reinforcing cord are vulcanized. An apparatus for manufacturing a rubber crawler, wherein the endless ring-shaped reinforcing cord is tensioned and stretched between a pair of rotatable tension pulleys.
位置を画定するために補強コードに付された目印を適正
位置に位置決めするために、前記テンションプーリを回
転して緊張された補強コードを移動調整するように構成
したことを特徴とする請求項１に記載のゴムクローラ製
造装置。2. The tension pulley is rotated and tensioned to position a mark attached to a reinforcing cord at an appropriate position to define both end positions for a predetermined circumferential length of the rubber to be vulcanized. The rubber crawler manufacturing apparatus according to claim 1, wherein the reinforcing cord is configured to move and adjust.
センサにて読み取り、前記テンションプーリを回転させ
て、これらの目印の位置を自動的に適正位置に位置決め
するように構成したことを特徴とする請求項２に記載の
ゴムクローラ製造装置。3. The apparatus according to claim 1, wherein a position of a mark attached to the reinforcing cord is read by a sensor, and the tension pulley is rotated to automatically position the mark at an appropriate position. The rubber crawler manufacturing apparatus according to claim 2, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11585299A JP4817207B2 (en) | 1999-04-23 | 1999-04-23 | Rubber crawler manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11585299A JP4817207B2 (en) | 1999-04-23 | 1999-04-23 | Rubber crawler manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000301538A true JP2000301538A (en) | 2000-10-31 |
| JP4817207B2 JP4817207B2 (en) | 2011-11-16 |
Family
ID=14672743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11585299A Expired - Lifetime JP4817207B2 (en) | 1999-04-23 | 1999-04-23 | Rubber crawler manufacturing method |
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| Country | Link |
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| JP (1) | JP4817207B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100494633B1 (en) * | 2001-08-08 | 2005-06-13 | 동일고무벨트주식회사 | Rubber crawler comprising jointless steel-cord |
-
1999
- 1999-04-23 JP JP11585299A patent/JP4817207B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100494633B1 (en) * | 2001-08-08 | 2005-06-13 | 동일고무벨트주식회사 | Rubber crawler comprising jointless steel-cord |
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| Publication number | Publication date |
|---|---|
| JP4817207B2 (en) | 2011-11-16 |
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