JP2009036367A - Conveyance chain with long service life - Google Patents

Conveyance chain with long service life Download PDF

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JP2009036367A
JP2009036367A JP2007203766A JP2007203766A JP2009036367A JP 2009036367 A JP2009036367 A JP 2009036367A JP 2007203766 A JP2007203766 A JP 2007203766A JP 2007203766 A JP2007203766 A JP 2007203766A JP 2009036367 A JP2009036367 A JP 2009036367A
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roller
chain
bush
roller shaft
long
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Takashi Nakagawa
貴司 中川
Hiroki Ishida
裕樹 石田
Toshihiko Aoki
敏彦 青木
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Tsubakimoto Chain Co
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Tsubakimoto Chain Co
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyance chain with a long service life, drastically reducing chain manufacturing burden while avoiding decline in plate strength and increase in the number of chain components, preventing leakage of lubricating oil to outside and entry of outside dust during chain operation and enabling long supply of lubricating oil between rollers and bushes by excellent sustained release of the lubricating oil by the bushes. <P>SOLUTION: The conveyance chain 100 with a long service life comprises inner plates 110, the bushes 120, the rollers 130, connecting pins 140 and outer plates 150. Lubricating oil is filled between the rollers 130 and the bushes 120. Each roller shaft part 131 with a small diameter formed to project from both end faces of the roller 130 toward the inner plate 110 is surroundedly supported by an annular swelling part 111 for journaling the roller 130 formed by recessing the outer face of the inner plate 110 and swelling it to the inner face in the offset state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、搬送用コンベヤチェーン、伝動用ローラチェーンなどに用いる長寿命チェーンに係るものであって、特に、左右一対で離間配置された内プレートと該内プレートのブシュ圧入孔に圧入嵌合された前後一対のブシュと該ブシュに対して回転自在に外嵌された前後一対のローラと前記ブシュ内に対して回転自在に挿通された前後一対の連結ピンと該連結ピンの両端にピン孔を圧入嵌合させて内プレートをチェーン長手方向に連結する左右一対の外プレートとを備え、前記ローラの内周面とブシュの外周面との間に潤滑油を封入してなる搬送用長寿命チェーンに関する。   The present invention relates to a long-life chain used for a conveyor chain for transmission, a roller chain for transmission, and the like, and is particularly press-fitted to a pair of left and right inner plates and a bush press-fitting hole of the inner plate. A pair of front and rear bushes, a pair of front and rear rollers that are rotatably fitted to the bushes, a pair of front and rear connection pins that are rotatably inserted into the bushes, and pin holes are press-fitted into both ends of the connection pins. A long-life chain for transportation comprising a pair of left and right outer plates that are fitted together to connect the inner plate in the longitudinal direction of the chain, and in which lubricating oil is sealed between the inner peripheral surface of the roller and the outer peripheral surface of the bush .

一対の外リンクプレートの両端部をピンで連結した外リンクと一対の内リンクプレートの両端部をブシュで連結すると共に該ブシュにローラを被嵌した内リンクとを前記ブシュに前記ピンを嵌挿することにより交互に連結し、かつ前記ブシュとローラとの間に封入される潤滑油をシールするシール手段を備えてなるシールチェーンが知られている。そして、このようなシールチェーンのシール手段は、前記内リンクプレートの内側面にブシュを囲むように形成された凹部と、前記ローラの両端部に遊嵌されたリング状のシールプレートと、前記凹部とシールプレートとの間に配置された弾性体からなるシールリングとを備えている（例えば特許文献１参照。）。
特開２００５−２８２８１３号公報（第７頁、図４） An outer link in which both ends of a pair of outer link plates are connected by pins and an inner link in which both ends of a pair of inner link plates are connected by bushes and a roller is fitted to the bushes are inserted into the bushes. Thus, there is known a seal chain provided with a sealing means that is alternately connected and seals the lubricating oil sealed between the bush and the roller. The sealing means of the seal chain includes a recess formed on the inner surface of the inner link plate so as to surround the bush, a ring-shaped seal plate loosely fitted to both ends of the roller, and the recess. And a seal ring made of an elastic body disposed between the seal plate and the seal plate (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2005-282813 (page 7, FIG. 4)

前述したような従来のシールチェーンでは、ローラと内リンクプレートとの間を密封してローラとブシュとの間に注入された潤滑油のシール効果を持続させるために、シールリングとシールプレートが内リンクプレートの内側面に形成された凹部とローラとの間に押圧状態で配置され、このような押圧状態の押圧力によって、ローラと内リンクプレートとの間の相対的な回転抵抗が大きくなり、チェーン稼動時にローラが円滑に転動しなくなるという問題があった。   In the conventional seal chain as described above, the seal ring and the seal plate are disposed in order to maintain the sealing effect of the lubricating oil injected between the roller and the bush by sealing between the roller and the inner link plate. It is arranged in a pressed state between the recess formed on the inner surface of the link plate and the roller, and the pressing force in such a pressed state increases the relative rotational resistance between the roller and the inner link plate, There was a problem that the roller did not roll smoothly during chain operation.

また、リング部材と弾性シールリングが内リンクプレートやローラ等に対して摺接摩耗することによって生じるシール効果の低下を防止するために、シールリングおよびシールプレートと接触する内リンクプレートの内側面とローラの端面の表面粗さを小さくする表面仕上げ加工を施す必要があり、加工負担が増加するという問題があった。   Further, in order to prevent a reduction in the sealing effect caused by the ring member and the elastic seal ring being slidably worn against the inner link plate, the roller, etc., the inner surface of the inner link plate contacting the seal ring and the seal plate There is a problem that it is necessary to perform a surface finishing process to reduce the surface roughness of the end face of the roller, which increases the processing load.

そして、シール手段としてのシールリングとシールプレートとを基本的なチェーン構成部品である内リンクプレートの内側面に形成された凹部とローラとの間に設けているので、チェーンの部品点数および組立工数が多くなり、チェーン組立性が悪くなるという問題があった。   Since the seal ring and the seal plate as the sealing means are provided between the recess and the roller formed on the inner surface of the inner link plate, which is a basic chain component, the number of parts of the chain and the number of assembly steps There was a problem that the chain assembly became worse and the chain assemblability deteriorated.

そこで、本発明は、従来の問題を解決するものであって、すなわち、本発明の目的は、プレート強度の低下とチェーン部品点数の増加を回避しつつチェーン製造負担を大幅に軽減するとともに、チェーン稼動時における潤滑油の外部漏出と外部塵埃の侵入を防止して、しかも、ブシュが優れた潤滑油の徐放性を発揮してローラの内周面とブシュの外周面との間に潤滑油を長期に亘って供給する搬送用長寿命チェーンを提供することである。   Therefore, the present invention solves the conventional problems, that is, the object of the present invention is to significantly reduce the chain manufacturing burden while avoiding a decrease in plate strength and an increase in the number of chain parts, and a chain. Prevents external leakage of lubricating oil and intrusion of external dust during operation, and the bush exhibits excellent gradual release of lubricating oil, so that the lubricating oil is between the inner peripheral surface of the roller and the outer peripheral surface of the bushing. It is to provide a long-life chain for conveyance that supplies a long-term supply.

請求項１に係る本発明は、左右一対で離間配置された内プレートと該内プレートのブシュ圧入孔に圧入嵌合された前後一対のブシュと該ブシュに対して回転自在に外嵌された前後一対のローラと前記ブシュ内に対して回転自在に挿通された前後一対の連結ピンと該連結ピンの両端にピン孔を圧入嵌合させて内プレートをチェーン長手方向に連結する左右一対の外プレートとを備え、前記ローラの内周面とブシュの外周面との間に潤滑油を封入してなる搬送用長寿命チェーンにおいて、前記ローラの両端面から内プレートに向けて突出形成した小径のローラ軸部が、前記内プレートの外側面を凹陥させてオフセット状態で内側面に膨出させたローラ軸支用環状膨出部によりそれぞれ囲繞支持されていることにより、前述した課題を解決したものである。   According to the first aspect of the present invention, a pair of left and right inner plates, a pair of front and rear bushes press-fitted into a bush press-fitting hole of the inner plate, and a front and rear fitted rotatably to the bush A pair of rollers and a pair of front and rear connecting pins that are rotatably inserted into the bush, and a pair of left and right outer plates that connect the inner plate in the longitudinal direction of the chain by press-fitting pin holes into both ends of the connecting pins. A small-diameter roller shaft that protrudes from both end surfaces of the roller toward the inner plate in a long-life chain for transportation formed by sealing lubricating oil between the inner peripheral surface of the roller and the outer peripheral surface of the bush The above-mentioned problems are solved by the portions being supported by the annular bulging portions for supporting the roller shaft that are recessed on the outer surface of the inner plate and bulged to the inner surface in an offset state. A.

請求項２に係る本発明は、請求項１記載の構成に加えて、前記ブシュが前記潤滑油を含浸させた焼結含油金属材料から成形されていることにより、前述した課題を解決したものである。   The present invention according to claim 2 solves the above-described problems by forming the bush from a sintered oil-impregnated metal material impregnated with the lubricating oil in addition to the configuration according to claim 1. is there.

請求項３に係る本発明は、請求項１または請求項２記載の構成に加えて、前記ローラの内周面とブシュの外周面との間に潤滑油を供給する油溜り溝が、前記ブシュの外周面に刻設されていることにより、前述した課題をさらに解決したものである。   According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, an oil sump groove for supplying lubricating oil between the inner peripheral surface of the roller and the outer peripheral surface of the bush includes the bush. The above-described problems are further solved by being engraved on the outer peripheral surface of the.

請求項４に係る本発明は、請求項１乃至請求項３のいずれかに記載の構成に加えて、前記ローラ軸支用環状膨出部の膨出面が、前記ローラ軸支用環状膨出部の凹陥面よりも大きな外径と小さな内径とを有していることにより、前述した課題をさらに解決したものである。   According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, the bulging surface of the annular bulging portion for supporting the roller shaft is an annular bulging portion for supporting the roller shaft. The above-described problems are further solved by having a larger outer diameter and a smaller inner diameter than the concave surface.

請求項５に係る本発明は、請求項１乃至請求項４のいずれかに記載の構成に加えて、前記ローラ軸支用環状膨出部の膨出面とローラの両端面が、相互に近接対向するラビリンス構造形成粗面を備えていることにより、前述した課題をさらに解決したものである。   According to a fifth aspect of the present invention, in addition to the structure according to any one of the first to fourth aspects, the bulging surface of the annular bulging portion for supporting the roller shaft and both end surfaces of the roller are close to each other. By providing the labyrinth structure forming rough surface, the above-described problems are further solved.

請求項６に係る本発明は、請求項５記載の構成に加えて、前記ローラ軸支用環状膨出部の内プレート内側面からの膨出量Ｄｔおよびローラ軸部のローラ両端面からの突出量Ｄｋが、Ｄｔ＜Ｄｋを満足するようにそれぞれ形成されていることにより、前述した課題をさらに解決したものである。   According to a sixth aspect of the present invention, in addition to the structure of the fifth aspect, the bulging amount Dt from the inner surface of the inner plate of the annular bulging portion for supporting the roller shaft and the protrusion of the roller shaft portion from both end surfaces of the roller. The amount Dk is formed so as to satisfy Dt <Dk, thereby further solving the above-described problem.

請求項７に係る本発明は、請求項１乃至請求項６のいずれかに記載の構成に加えて、前記ローラ軸支用環状膨出部の内プレート内側面からの膨出量Ｄｔ、ローラ軸部のローラ両端面からの突出量Ｄｋ、内プレート内側面の相互間隔Ｄｉおよびローラの幅Ｄｒが、Ｄｉ−Ｄｔ＜Ｄｒ＋２Ｄｋ＜Ｄｉを満足するようにそれぞれ形成されていることにより、前述した課題をさらに解決したものである。   According to a seventh aspect of the present invention, in addition to the structure according to any one of the first to sixth aspects, the bulging amount Dt from the inner surface of the inner plate of the annular bulging portion for supporting the roller shaft, the roller shaft The protrusion amount Dk from the both end faces of the roller, the mutual distance Di between the inner side faces of the inner plate, and the width Dr of the roller are formed so as to satisfy Di-Dt <Dr + 2Dk <Di, respectively. It is a further solution.

請求項８に係る本発明は、請求項１乃至請求項７のいずれかに記載の構成に加えて、前記ローラ軸支用環状膨出部の膨出面の内径Ｗｔｉ、ローラ軸部の外径Ｗｋ、ローラの内径Ｗｒおよびブシュの外径Ｗｂが、Ｗｔｉ−Ｗｋ＞Ｗｒ−Ｗｂを満足するようにそれぞれ形成されていることにより、前述した課題をさらに解決したものである。   According to an eighth aspect of the present invention, in addition to the configuration according to any one of the first to seventh aspects, the inner diameter Wti of the bulging surface of the annular bulging portion for roller shaft support and the outer diameter Wk of the roller shaft portion. The above-described problems are further solved by forming the inner diameter Wr of the roller and the outer diameter Wb of the bush so as to satisfy Wti-Wk> Wr-Wb.

なお、本発明の搬送用長寿命チェーンで言うところの「オフセット状態」とは、ローラ軸支用環状膨出部とそれ以外のプレート部分とがプレート厚み方向にずれて段差状を呈している状態を意味している。
また、本発明の搬送用長寿命チェーンで言うところの「焼結含油金属材料」とは、その内部に無数の気孔を有するように金属粉末を圧縮成形して融解点以下の温度で焼結することで得られた多孔質材に潤滑油を含浸させた金属材料を意味している。
また、本発明の搬送用長寿命チェーンで言うところの「ラビリンス構造形成粗面」とは、油溜り用ラビリンス構造を形成し得る粗面を意味している。 The "offset state" in the long-life chain for conveyance according to the present invention is a state in which the annular bulging portion for supporting the roller shaft and the other plate portion are shifted in the plate thickness direction to form a step shape. Means.
The “sintered oil-impregnated metal material” in the long-life chain for transportation of the present invention is a metal powder compression-molded so as to have innumerable pores inside and sintered at a temperature below the melting point. This means a metal material obtained by impregnating a porous material obtained by impregnation with a lubricating oil.
Moreover, the “labyrinth structure forming rough surface” in the long-life chain for conveyance of the present invention means a rough surface on which a labyrinth structure for oil sump can be formed.

そこで、本発明は、左右一対で離間配置された内プレートと内プレートのブシュ圧入孔に圧入嵌合された前後一対のブシュとブシュに対して回転自在に外嵌された前後一対のローラとブシュ内に対して回転自在に挿通された前後一対の連結ピンと連結ピンの両端にピン孔を圧入嵌合させて内プレートをチェーン長手方向に連結する左右一対の外プレートとを備え、ローラの内周面とブシュの外周面との間に潤滑油を封入していることにより、外部からの無給油状態で長期にわたってチェーン駆動することができるばかりでなく、以下のような特有の効果を奏することができる。   Accordingly, the present invention provides a pair of left and right inner plates, a pair of front and rear bushes press-fitted into the bush press-fitting holes of the inner plate, and a pair of front and rear rollers and bushes that are rotatably fitted to the bushes. A pair of front and rear connecting pins that are rotatably inserted into the inside, and a pair of left and right outer plates that press-fit pin holes into both ends of the connecting pins to connect the inner plate in the longitudinal direction of the chain. By encapsulating the lubricating oil between the surface and the outer peripheral surface of the bush, not only can the chain be driven for a long period of time without lubrication from the outside, but also the following unique effects can be achieved. it can.

請求項１に係る本発明の搬送用長寿命チェーンによれば、ローラの両端面から内プレートに向けて突出形成した小径のローラ軸部が、内プレートの外側面を凹陥させてオフセット状態で内側面に膨出させたローラ軸支用環状膨出部によりそれぞれ囲繞支持されていることにより、このようなローラ軸部とローラ軸支用環状膨出部と内プレートの内側面との間に生じた潤滑油の漏出径路が複雑に屈曲して油溜り機能を発揮する油溜り用ラビリンス構造となって、チェーン走行時の周回走行によって生じる遠心力等に起因したローラとブシュとの間に封入された潤滑油の外部漏出を抑制するとともに外部塵埃の侵入を抑制するので、チェーン走行時において搬送物を支持するとともに走行するチェーンを支持して摺動頻度が高く摩耗が進行し易いローラの内周面とブシュの外周面の摩耗損傷や焼付きを抑制できる。   According to the long-life chain for conveyance of the present invention according to claim 1, the small-diameter roller shaft portion formed to protrude from the both end faces of the roller toward the inner plate is recessed in the outer surface of the inner plate in the offset state. By being surrounded and supported by the roller shaft support annular bulge portions bulged on the side surfaces, the roller shaft support portion, the roller shaft support annular bulge portion and the inner surface of the inner plate are generated. The oil leakage labyrinth structure with a complicated bending of the leakage path of the lubricating oil is used, and is sealed between the roller and the bush due to centrifugal force generated by the circular travel during chain travel. In addition, it suppresses external leakage of lubricating oil and suppresses intrusion of external dust, so it supports the transported object and supports the traveling chain during chain travel, and the sliding frequency is high and wear tends to progress. The wear damage and seizing of the inner peripheral surface and the outer circumferential surface of the bushing over La can be suppressed.

また、ローラ軸支用環状膨出部が内プレートの外側面を凹陥させて内側面に膨出させたオフセット状態で形成されていることにより、ローラ軸支用環状膨出部の断面係数とそれ以外のプレート部分の断面係数とが同程度となるので、ローラ軸支用環状膨出部を形成することによる内プレートの強度低下を抑制できるとともに、内プレートのプレス打ち抜き加工を行う際に、内プレートの外側面を凹陥させて内側面へ膨出させる形状の金型を用いるだけで、内プレートの打ち抜き加工とローラ軸支用環状膨出部の形成加工とを同時に行うことができるので、内プレートの打ち抜き加工とは別途にローラ軸支用環状膨出部を形成する研削やミーリング等の機械加工を内プレートに施す必要がなく、チェーンの製造負担を軽減できる。   Further, since the annular bulging portion for roller shaft support is formed in an offset state in which the outer surface of the inner plate is recessed and bulged to the inner surface, the section coefficient of the annular bulging portion for roller shaft support and the Since the section modulus of the other plate portion is approximately the same, it is possible to suppress a decrease in the strength of the inner plate due to the formation of the annular bulging portion for supporting the roller shaft, and when the inner plate is subjected to press punching, The inner plate can be punched out and the annular bulging portion for supporting the roller shaft can be formed at the same time simply by using a mold that has a concave shape on the outer surface of the plate and bulges toward the inner surface. Apart from the punching of the plate, it is not necessary to perform machining such as grinding or milling for forming the annular bulging portion for supporting the roller shaft on the inner plate, and the manufacturing burden of the chain can be reduced.

また、内プレートとローラとの間には、従来のシールチェーンのような内リンクプレートとローラとの間に押圧状態で配置したシール部材を別部材として設けていないので、ローラの転動抵抗が小さく、チェーン稼動時にローラが円滑に転動しながらスプロケットに噛み合うとともに、チェーンの部品点数が少なくチェーン切り継ぎ等の分解組み付け作業が容易である。
また、従来のシールチェーンでは、シール部材の摺接摩耗を防止して潤滑油の密封性を維持するために、内リンクプレートの内側面とローラの端面に表面粗さを小さくする表面仕上げ加工を施す必要があったが、本発明の搬送用長寿命チェーンでは、従来のような表面仕上げ加工を施す必要がなく、チェーンの製造負担を軽減できる。 Further, since the seal member arranged in a pressed state between the inner link plate and the roller like the conventional seal chain is not provided between the inner plate and the roller as a separate member, the rolling resistance of the roller is reduced. The roller is small and meshes with the sprocket while the roller rolls smoothly during chain operation. The number of parts of the chain is small and disassembly and assembly work such as chain cut-off is easy.
In addition, in the conventional seal chain, in order to prevent sliding contact wear of the seal member and maintain the sealing performance of the lubricating oil, surface finishing processing is performed to reduce the surface roughness on the inner surface of the inner link plate and the end surface of the roller. However, the long-life chain for transport according to the present invention does not require surface finishing as in the conventional case, and the manufacturing burden of the chain can be reduced.

請求項２に係る本発明の搬送用長寿命チェーンによれば、請求項１記載の搬送用長寿命チェーンが奏する効果に加えて、ブシュが潤滑油を含浸させた焼結含油金属材料から成形されていることにより、ローラの内周面とブシュの外周面との間に潤滑油が充分に供給されてない状態となっても、ブシュが優れた潤滑油の徐放性を発揮して、すなわち、チェーン稼動時の周回走行によって生じる遠心力等に起因してブシュの内部に形成された無数の気孔に含浸された潤滑油がローラの内周面とブシュの外周面との間に徐々に滲み出すので、ローラの内周面とブシュの外周面との間の摺接摩耗を低減でき、また、焼結含油金属材料からなるブシュは何らの加工を施していない通常のブシュと同形状を呈しており、通常のブシュと同様に取り扱うことができるので、チェーン切り継ぎなどの分解組み付け作業を簡便に達成できる。   According to the transporting long-life chain of the present invention according to claim 2, in addition to the effect exhibited by the transporting long-life chain according to claim 1, the bush is formed from a sintered oil-impregnated metal material impregnated with lubricating oil. Therefore, even when the lubricating oil is not sufficiently supplied between the inner peripheral surface of the roller and the outer peripheral surface of the bush, the bush exhibits excellent lubricating oil release characteristics, that is, Lubricating oil impregnated in countless pores formed inside the bush due to centrifugal force, etc. generated by circular running during chain operation gradually oozes between the inner peripheral surface of the roller and the outer peripheral surface of the bush Therefore, the sliding contact wear between the inner peripheral surface of the roller and the outer peripheral surface of the bush can be reduced, and the bush made of sintered oil-impregnated metal material has the same shape as a normal bush without any processing. And handle like a normal bush Because it can easily achieve the decomposition assembly work, such as the chain cut follows.

請求項３に係る本発明の搬送用長寿命チェーンによれば、請求項１または請求項２記載の搬送用長寿命チェーンが奏する効果に加えて、ローラの内周面とブシュの外周面との間に潤滑剤を供給する油溜り溝が、ブシュの外周面に刻設されていることにより、より多くの潤滑油を封入してローラの内周面とブシュの外周面との間に潤滑油を継続的に供給するので、ローラの内周面とブシュの外周面の摺接摩耗を長期に亘って低減でき、ローラとブシュとの間で発生する摺動音や焼付きを防止できるとともに、スプロケットとの噛み合い時にローラが円滑に転動しながら噛み合うため、チェーンの摩耗を防止できる。   According to the transporting long-life chain of the present invention according to claim 3, in addition to the effect exhibited by the transporting long-life chain according to claim 1 or claim 2, the inner peripheral surface of the roller and the outer peripheral surface of the bush An oil reservoir groove for supplying a lubricant is engraved on the outer peripheral surface of the bush, so that a larger amount of lubricating oil is enclosed between the inner peripheral surface of the roller and the outer peripheral surface of the bush. Is continuously supplied, so that sliding wear between the inner peripheral surface of the roller and the outer peripheral surface of the bush can be reduced over a long period of time, and sliding noise and seizure occurring between the roller and the bush can be prevented. Since the roller meshes with the sprocket while meshing with the sprocket, wear of the chain can be prevented.

請求項４に係る本発明の搬送用長寿命チェーンによれば、請求項１乃至請求項３のいずれかに記載の搬送用長寿命チェーンが奏する効果に加えて、ローラ軸支用環状膨出部の膨出面が、ローラ軸支用環状膨出部の凹陥面よりも大きな外径と小さな内径とを有していることにより、内プレートに形成された段差部分、すなわち、ブシュ圧入孔を中心として凹陥面の外径よりも大径で膨出面の外径よりも小径なプレート部分の断面係数、および、ブシュ圧入孔を中心として膨出面の内径よりも大径で凹陥面の内径よりも小径なプレート部分の断面係数が、それ以外のプレート部分の断面係数よりもそれぞれ大きくなるので、チェーン稼動時に疲労破壊を生じがちな内プレートの段差部分の強度を向上できる。   According to the conveying long-life chain of the present invention according to claim 4, in addition to the effect produced by the conveying long-life chain according to any one of claims 1 to 3, an annular bulging portion for roller shaft support The bulge surface has a larger outer diameter and smaller inner diameter than the concave surface of the annular bulge portion for supporting the roller shaft, so that the stepped portion formed on the inner plate, that is, the bush press-fitting hole is the center. The section modulus of the plate part that is larger than the outer diameter of the recessed surface and smaller than the outer diameter of the bulging surface, and is larger than the inner diameter of the bulging surface around the bush press-fit hole and smaller than the inner diameter of the recessed surface. Since the section modulus of the plate portion is larger than the section modulus of the other plate portions, the strength of the step portion of the inner plate that tends to cause fatigue failure during chain operation can be improved.

請求項５に係る本発明の搬送用長寿命チェーンによれば、請求項１乃至請求項４のいずれかに記載の搬送用長寿命チェーンが奏する効果に加えて、ローラ軸支用環状膨出部の膨出面とローラの両端面が、相互に近接対向するラビリンス構造形成粗面を備えていることにより、ローラ軸支用環状膨出部の膨出面とローラの両端面との間には油溜り用ラビリンス構造が形成されているので、ローラの内周面とブシュの外周面との間に注入された潤滑油のシール効果をより一層向上させることができ、ローラの内周面とブシュの外周面との間に注入された潤滑油の外部漏出および外部塵埃の侵入を防止できる。   According to the conveying long-life chain of the present invention according to claim 5, in addition to the effect exhibited by the conveying long-life chain according to any one of claims 1 to 4, an annular bulging portion for roller shaft support Since the bulging surface of the roller and the both end surfaces of the roller are provided with rough surfaces that form a labyrinth structure facing each other, an oil reservoir is provided between the bulging surface of the annular bulging portion for supporting the roller shaft and the both end surfaces of the roller. Since the labyrinth structure is formed, the sealing effect of the lubricating oil injected between the inner peripheral surface of the roller and the outer peripheral surface of the bush can be further improved, and the inner peripheral surface of the roller and the outer periphery of the bush It is possible to prevent external leakage of the lubricating oil injected between the surface and intrusion of external dust.

請求項６に係る本発明の搬送用長寿命チェーンによれば、請求項５記載の搬送用長寿命チェーンが奏する効果に加えて、ローラ軸支用環状膨出部の内プレート内側面からの膨出量Ｄｔおよびローラ軸部のローラ両端面からの突出量Ｄｋが、Ｄｔ＜Ｄｋを満足するようにそれぞれ形成されていることにより、チェーン稼動時にローラが内プレートに対してチェーン幅方向に片寄った際にも、摺接抵抗の小さいローラ軸部の端面と内プレートの内側面とが互いに接触して、摺接抵抗の大きいローラ軸支用環状膨出部の膨出面とローラの両端面とが接触することを完全に阻止するので、ローラの転動抵抗が小さく、チェーン稼動時にローラが円滑に転動しながらスプロケットに噛み合うため、チェーンの摩耗を防止できる。   According to the sixth aspect of the present invention, the long-life chain for transportation according to the present invention has the effect of the long-life chain for transportation according to the fifth aspect, and the expansion of the annular bulging portion for supporting the roller shaft from the inner surface of the inner plate. Since the protruding amount Dt and the protruding amount Dk of the roller shaft portion from both end faces of the roller are formed so as to satisfy Dt <Dk, the roller is offset in the chain width direction with respect to the inner plate during the chain operation. At the same time, the end surface of the roller shaft portion having a small sliding contact resistance and the inner surface of the inner plate come into contact with each other, and the bulging surface of the annular bulging portion for roller shaft support having a large sliding contact resistance and both end surfaces of the roller are brought into contact with each other. Since the contact is completely prevented, the rolling resistance of the roller is small, and the roller meshes with the sprocket while smoothly rolling when the chain is in operation, so that chain wear can be prevented.

請求項７に係る本発明の搬送用長寿命チェーンによれば、請求項１乃至請求項６のいずれかに記載の搬送用長寿命チェーンが奏する効果に加えて、ローラ軸支用環状膨出部の内プレート内側面からの膨出量Ｄｔ、ローラ軸部のローラ両端面からの突出量Ｄｋ、内プレート内側面の相互間隔Ｄｉおよびローラの幅Ｄｒが、Ｄｉ−Ｄｔ＜Ｄｒ＋２Ｄｋ＜Ｄｉを満足するようにそれぞれ形成されていることにより、チェーン稼動時にローラが内プレートに対してチェーン幅方向に片寄った際にも、ローラ軸部がローラ軸支用環状膨出部から外れることを阻止して潤滑油の外部漏出を防止するので、ブシュの外周面とローラの内周面の摺接摩耗や焼付きを抑制できる。   According to the conveying long-life chain of the present invention according to claim 7, in addition to the effect produced by the conveying long-life chain according to any one of claims 1 to 6, an annular bulging portion for roller shaft support The amount of bulging Dt from the inner surface of the inner plate, the amount of protrusion Dk of the roller shaft portion from both end surfaces of the roller, the mutual distance Di of the inner surface of the inner plate and the width Dr of the roller satisfy Di-Dt <Dr + 2Dk <Di. In this way, even when the roller is displaced in the chain width direction with respect to the inner plate during chain operation, the roller shaft portion is prevented from coming off from the annular bulging portion for supporting the roller shaft and is lubricated. Since oil leakage is prevented, sliding wear and seizure between the outer peripheral surface of the bush and the inner peripheral surface of the roller can be suppressed.

請求項８に係る本発明の搬送用長寿命チェーンによれば、請求項１乃至請求項７のいずれかに記載の搬送用長寿命チェーンが奏する効果に加えて、ローラ軸支用環状膨出部の膨出面の内径Ｗｔｉ、ローラ軸部の外径Ｗｋ、ローラの内径Ｗｒおよびブシュの外径Ｗｂが、Ｗｔｉ−Ｗｋ＞Ｗｒ−Ｗｂを満足するようにそれぞれ形成されていることにより、ローラがブシュに対してチェーン進行方向に片寄った際に、ローラの内周面とブシュの外周面とが接触して、ローラ軸部の外周面とローラ軸支用環状膨出部の内周面とが互いに接触することを完全に阻止するので、ローラ軸部の外周面とローラ軸支用環状膨出部の内周面との摺動接触に起因する摩耗粉がローラの内周面とブシュの外周面との間に侵入して、このような摩耗粉が研摩剤となってローラの内周面とブシュの外周面との間で生じがちな異常な摩耗損傷を防止できる。   According to the conveying long-life chain of the present invention according to claim 8, in addition to the effect exhibited by the conveying long-life chain according to any one of claims 1 to 7, an annular bulging portion for roller shaft support Since the inner diameter Wti of the bulging surface, the outer diameter Wk of the roller shaft portion, the inner diameter Wr of the roller and the outer diameter Wb of the bush are respectively formed so as to satisfy Wti-Wk> Wr-Wb, the roller is When the roller moves in the direction of chain movement, the inner peripheral surface of the roller and the outer peripheral surface of the bush come into contact with each other, and the outer peripheral surface of the roller shaft portion and the inner peripheral surface of the annular bulging portion for supporting the roller shaft are mutually connected. Since the contact is completely prevented, the abrasion powder caused by the sliding contact between the outer peripheral surface of the roller shaft portion and the inner peripheral surface of the annular bulging portion for supporting the roller shaft is exposed to the inner peripheral surface of the roller and the outer peripheral surface of the bush. Such wear powder becomes an abrasive. The resulting tend abnormal wear damage between the inner and outer circumferential surfaces of the bushing over la can be prevented.

本発明は、左右一対で離間配置された内プレートと該内プレートのブシュ圧入孔に圧入嵌合された前後一対のブシュと該ブシュに対して回転自在に外嵌された前後一対のローラと前記ブシュ内に対して回転自在に挿通された前後一対の連結ピンと該連結ピンの両端にピン孔を圧入嵌合させて内プレートをチェーン長手方向に連結する左右一対の外プレートとを備え、前記ローラの内周面とブシュの外周面との間に潤滑油を封入してなる搬送用長寿命チェーンにおいて、前記ローラの両端面から内プレートに向けて突出形成した小径のローラ軸部が、前記内プレートの外側面を凹陥させてオフセット状態で内側面に膨出させたローラ軸支用環状膨出部によりそれぞれ囲繞支持されて、プレート強度の低下とチェーン部品点数の増加を回避しつつチェーン製造負担を大幅に軽減するとともに、チェーン稼動時における潤滑油の外部漏出と外部塵埃の侵入を防止して、しかも、ブシュが優れた潤滑油の徐放性を発揮してローラの内周面とブシュの外周面との間に潤滑油を長期に亘って供給するものであれば、その具体的な実施の形態は如何なるものであっても何ら構わない。   The present invention includes a pair of left and right inner plates, a pair of front and rear bushes press-fitted into a bush press-fitting hole of the inner plate, a pair of front and rear rollers rotatably fitted to the bush, A pair of front and rear connecting pins that are rotatably inserted into the bush, and a pair of left and right outer plates that connect the inner plate in the longitudinal direction of the chain by press-fitting pin holes into both ends of the connecting pin, In the long-life chain for transportation in which lubricating oil is sealed between the inner peripheral surface of the bush and the outer peripheral surface of the bush, the small-diameter roller shaft portion formed to protrude from the both end surfaces of the roller toward the inner plate It is surrounded and supported by an annular bulging portion for roller shafts that is recessed on the outer surface of the plate and bulged on the inner surface in an offset state, while avoiding a decrease in plate strength and an increase in the number of chain parts. The inner peripheral surface of the roller greatly reduces the burden of manufacturing the chain and prevents external leakage of the lubricating oil and intrusion of external dust when the chain is in operation. As long as the lubricating oil is supplied over a long period of time between the bush and the outer peripheral surface of the bush, any specific embodiment may be used.

例えば、本発明の搬送用長寿命チェーンに組み込まれるローラの具体的材料については、耐摩耗性、耐衝撃性を備えたものであれば、工具鋼、ステンレス鋼、ゴム、エンプラと称するエンジニアリングプラスチックなどのいずれであっても良く、特に、工具鋼を採用した場合には、ブシュや内プレート等との摺動接触に起因した摩耗損傷を防止できるので、より好ましい。  For example, as for the specific material of the roller incorporated into the long-life chain for conveyance according to the present invention, tool steel, stainless steel, rubber, engineering plastic called engineering plastic, etc. as long as it has wear resistance and impact resistance In particular, when tool steel is employed, wear damage due to sliding contact with the bush, the inner plate or the like can be prevented, which is more preferable.

また、本発明の搬送用長寿命チェーンに組み込まれるブシュの具体的な態様については、その内部に無数の気孔を有するように金属粉末を圧縮成形して融解点以下の温度で焼結することで得られた多孔質材に潤滑油を含浸させた焼結含油金属材料から成形されて強靱性および潤滑油の徐放性を発揮するものであれば、焼結含油金属材料の焼結密度やその原料となる金属粉末の具体的な種類や組み合わせは如何なるものであっても良く、特に、焼結含油金属材料が、鉄、銅、ニッケル、クロムモリブデン鋼などを配合してなる混合金属粉末を圧縮形成するとともに６．０ｇ／ｃｍ３〜７．０ｇ／ｃｍ３の焼結密度で焼結することで成形されている場合には、ブシュがチェーン張力に起因する剪断力および衝撃力を受けるための強靱性能や多くの潤滑油を含浸させて長期に亘ってローラとブシュとの間に潤滑油を供給する含油性能および徐放性能の両方をバランス良く兼ね備えて充分に発揮できる。 Moreover, about the specific aspect of the bush integrated in the long-life chain for conveyance of this invention, metal powder is compression-molded so that it may have innumerable pores, and sintered at a temperature below the melting point. If the obtained porous material is molded from sintered oil-impregnated metal material impregnated with lubricating oil and exhibits toughness and sustained release of lubricating oil, the sintered density of the sintered oil-impregnated metal material and its Any specific type or combination of metal powders used as raw materials may be used. In particular, sintered oil-impregnated metal materials are compressed mixed metal powders composed of iron, copper, nickel, chromium molybdenum steel, etc. sintering density of 6.0g / cm 3 ~7.0g / cm 3 so as to form when it is molded by sintering bushing for receiving the shear and impact forces caused by the chain tension Tough performance and much more Lubricating oil can be sufficiently exhibited both oil-bearing performance and sustained performance supplies lubricating oil combines good balance between the roller and the bush for a long time is impregnated.

また、本発明の搬送用長寿命チェーンにおいて用いられる潤滑油の具体的な種類については、潤滑性や耐劣化性を備えたものであれば如何なるものであって良く、特に、ポリαオレフィンやポリオールエステルなどの合成系炭化水素を基油とする合成油を採用した場合には、優れた粘性、潤滑性、耐劣化性を発揮して、ブシュの内部に形成された気孔に目詰まりを生じさせることなくブシュの気孔から長期に亘ってローラとブシュとの間に滲み出て摺接摩耗を抑制できる。   In addition, the specific type of lubricating oil used in the long-life chain for transportation of the present invention may be any as long as it has lubricity and deterioration resistance, and in particular, poly α olefin and polyol When synthetic oils based on synthetic hydrocarbons such as esters are used, they exhibit excellent viscosity, lubricity, and deterioration resistance, and clog the pores formed inside the bush. Without squeezing, it is possible to ooze between the roller and the bush over a long period of time from the air hole of the bush, and to suppress sliding contact wear.

また、本発明の搬送用長寿命チェーンにおける油溜り溝の具体的形状については、Ｄカット形状の凹溝、ブシュの外周面に周設した環状の凹溝などいずれであっても差し支えないが、Ｄカット形状の凹溝の場合には、ブシュの強度を低下させることなく多くの潤滑油を封入することができるので、より好ましい。
また、本発明の搬送用長寿命チェーンにおける油溜り溝の個数については、連結ピンの外周面に１つ設けたもの、連結ピンの外周面に２つ設けたものなどいずれであっても差し支えない。 In addition, as for the specific shape of the oil sump groove in the transporting long-life chain of the present invention, it may be any of a D-cut shaped groove, an annular groove formed around the outer peripheral surface of the bush, etc. In the case of a D-shaped groove, more lubricating oil can be enclosed without lowering the strength of the bush, which is more preferable.
In addition, the number of oil sump grooves in the transporting long-life chain of the present invention may be either one provided on the outer peripheral surface of the connecting pin or two provided on the outer peripheral surface of the connecting pin. .

また、本発明の搬送用長寿命チェーンにおけるローラ軸部の具体的な形状については、外周面が円形に形成されたもの、外周面が多角形に形成されたものなどいずれであっても差し支えない。   In addition, the specific shape of the roller shaft part in the long-life chain for conveyance according to the present invention may be any one in which the outer peripheral surface is formed in a circular shape, or the outer peripheral surface is formed in a polygonal shape. .

以下、本発明の第１実施例である搬送用長寿命チェーン１００を図面に基づいて説明する。
ここで、図１は、本発明の第１実施例である搬送用長寿命チェーンの一部を切り欠いた全体概要図であり、図２は、図１に示す搬送用長寿命チェーンの連結状態を示す斜視図であり、図３は、図１に示す搬送用長寿命チェーンを一部拡大視した断面図であり、図４は、図１に示す搬送用長寿命チェーンに組み込まれるブシュを一部拡大視した斜視図であり、図５は、図１に示す搬送用長寿命チェーンの組み付け寸法図であり、図６は、図１の搬送用長寿命チェーンに組み込まれるローラがチェーン幅方向に片寄った状態を示す寸法図であり、図７は、図１の搬送用長寿命チェーンに組み込まれるローラがチェーン進行方向に片寄った状態を示す寸法図である。 Hereinafter, a conveying long-life chain 100 according to a first embodiment of the present invention will be described with reference to the drawings.
Here, FIG. 1 is an overall schematic view in which a part of a long-life chain for transportation according to the first embodiment of the present invention is cut out, and FIG. 2 is a connection state of the long-life chain for transportation shown in FIG. FIG. 3 is a cross-sectional view of a part of the long-life chain for conveyance shown in FIG. 1, and FIG. 4 is a cross-sectional view of the bush incorporated in the long-life chain for conveyance shown in FIG. FIG. 5 is an assembly dimension diagram of the long-life chain for conveyance shown in FIG. 1, and FIG. 6 is a perspective view of a roller incorporated in the long-life chain for conveyance shown in FIG. FIG. 7 is a dimensional diagram showing a state in which a roller incorporated in the long-life chain for conveyance in FIG. 1 is offset in the chain traveling direction.

まず、本発明の第１実施例である搬送用長寿命チェーン１００は、図１および図３に示すように、左右一対で離間配置された内プレート１１０と、内プレート１１０のブシュ圧入孔に圧入嵌合された前後一対のブシュ１２０と、ブシュ１２０に回転自在に外嵌された前後一対のローラ１３０と、ブシュ１２０の内部に回転自在に挿通された前後一対の連結ピン１４０と、連結ピン１４０の両端をピン孔に圧入嵌合して内プレート１１０をチェーン長手方向に連結する左右一対で離間配置された外プレート１５０とを備えている。
そして、ローラ１３０の内周面とブシュ１２０の外周面との間に潤滑油が封入されている。 First, as shown in FIGS. 1 and 3, a long-life chain 100 for conveyance according to a first embodiment of the present invention is press-fitted into a pair of left and right inner plates 110 and bush press-fitting holes of the inner plate 110. A pair of front and rear bushes 120 that are fitted, a pair of front and rear rollers 130 that are rotatably fitted to the bush 120, a pair of front and rear connection pins 140 that are rotatably inserted into the bush 120, and a connection pin 140 And a pair of left and right outer plates 150 for connecting the inner plate 110 in the longitudinal direction of the chain.
The lubricating oil is sealed between the inner peripheral surface of the roller 130 and the outer peripheral surface of the bush 120.

そこで、本実施例の搬送用長寿命チェーン１００が最も特徴とする内プレート１１０およびローラ１３０の具体的な形態について図２乃至図７により詳しく説明する。
まず、図２および図３に示すように、内プレート１１０には、外側面を凹陥させて、すなわち、凹ませて陥らせてオフセット状態で内側面に膨出させたローラ軸支用環状膨出部１１１が形成されており、このローラ軸支用環状膨出部１１１にローラ１３０の両端面から内プレート１１０に向けて突出形成した小径のローラ軸部１３１がそれぞれ囲繞支持されている。
なお、本発明の搬送用長寿命チェーン１００で言うところの「オフセット状態」とは、ローラ軸支用環状膨出部１１１とそれ以外のプレート部分とがずれて段差状を呈している状態を意味している。 Therefore, specific forms of the inner plate 110 and the roller 130, which are the most characteristic features of the conveying long-life chain 100 of this embodiment, will be described in detail with reference to FIGS.
First, as shown in FIGS. 2 and 3, the inner plate 110 has an outer surface recessed, that is, an annular bulge for supporting a roller shaft that is recessed and bulged to the inner surface in an offset state. A portion 111 is formed, and a small-diameter roller shaft portion 131 that protrudes from both end surfaces of the roller 130 toward the inner plate 110 is surrounded and supported by the roller shaft support annular bulging portion 111.
The “offset state” in the long life chain 100 for conveyance according to the present invention means a state in which the annular bulging portion 111 for supporting the roller shaft and the other plate portion are shifted to form a stepped shape. is doing.

ブシュ１２０は、図４に示すように、焼結含油金属材料、すなわち、その内部に無数の気孔１２１を有するように金属粉末を圧縮成形して融解点以下の温度で焼結することで得られた多孔質材に潤滑油を含浸させた金属材料から成形されており、そのため、チェーン稼動時の周回走行によって生じる遠心力等に起因してブシュ１２０の内部に形成された無数の気孔１２１に含浸された潤滑油がローラ１３０の内周面とブシュ１２０の外周面との間に徐々に滲み出すようになっている。
なお、この焼結含油金属材料は、鉄、銅、ニッケル、クロムモリブデン鋼などを配合してなる混合金属粉末を圧縮形成するとともに６．０ｇ／ｃｍ３〜７．０ｇ／ｃｍ３の焼結密度で焼結することで成形されており、そのため、ブシュ１２０は、チェーン張力に起因する剪断力および衝撃力を受けるための強靱性能と、多くの潤滑油を含浸させて長期に亘ってローラ１３０とブシュ１２０との間に潤滑油を供給する含油性能および徐放性能の両方をバランス良く兼ね備えて充分に発揮するようになっている。
また、本実施例の搬送用長寿命チェーン１００では、潤滑油としてポリαオレフィンやポリオールエステルなどの合成系炭化水素を基油とする合成油を採用しており、優れた粘性、潤滑性、耐劣化性を発揮して、ブシュ１２０の内部に形成された気孔１２１に目詰まりを生じさせることなくブシュ１２０の気孔１２１から長期に亘って安定してローラ１３０とブシュ１２０との間に滲み出て摺接摩耗を抑制するようになっている。 As shown in FIG. 4, the bush 120 is obtained by compressing and sintering a sintered oil-impregnated metal material, that is, metal powder so as to have innumerable pores 121 therein and at a temperature below the melting point. The porous material 121 is molded from a metal material impregnated with lubricating oil, and thus impregnated innumerable pores 121 formed inside the bush 120 due to centrifugal force or the like caused by circular running during chain operation. The lubricating oil thus applied gradually oozes between the inner peripheral surface of the roller 130 and the outer peripheral surface of the bush 120.
Incidentally, the sintered density of the sintered oil-impregnated metallic material, iron, copper, nickel, 6.0g / cm 3 ~7.0g / cm 3 with compressed form the mixed metal powder obtained by blending such as chromium molybdenum steel Therefore, the bush 120 has a tough performance for receiving a shearing force and an impact force due to the chain tension, and a roller 130 which is impregnated with a lot of lubricating oil over a long period of time. Both the oil impregnation performance for supplying the lubricating oil to the bushing 120 and the sustained release performance are well balanced and fully exerted.
Further, in the long-life chain 100 for transportation of this embodiment, a synthetic oil based on a synthetic hydrocarbon such as poly-α-olefin or polyol ester is used as the lubricating oil, and has excellent viscosity, lubricity, resistance to resistance. Deteriorating and stably oozing between the roller 130 and the bush 120 from the pore 121 of the bush 120 over a long period of time without causing clogging of the pore 121 formed inside the bush 120. It is designed to suppress sliding contact wear.

ローラ軸支用環状膨出部１１１の膨出面１１１ａとローラ１３０の両端面は、図３に示すように、梨地状のラビリンス構造形成粗面１１２、１３２をそれぞれ有しており、このラビリンス構造形成粗面１１２、１３２は、相互に近接対向してローラ軸支用環状膨出部１１１の膨出面１１１ａとローラ１３０の両端面との間に油溜り用ラビリンス構造Ｌ２を形成して、ローラ１３０とブシュ１２０との間に注入された潤滑油の外部漏出を抑制するとともに外部塵埃の侵入を防止するようになっている。 As shown in FIG. 3, the bulging surface 111a of the roller shaft supporting annular bulging portion 111 and both end surfaces of the roller 130 have matte surface labyrinth structure forming rough surfaces 112 and 132, respectively. rough surface 112 and 132, to form the oil reservoir labyrinth structure L 2 between the end surfaces of the bulged surface 111a and the roller 130 of the adjacent face each other roller shaft journaling annular swelling portion 111, the roller 130 The outer leakage of the lubricating oil injected between the bushing 120 and the bush 120 is suppressed, and the entry of external dust is prevented.

ローラ軸支用環状膨出部１１１の膨出面１１１ａの外径Ｗｔｏは、図５に示すように、ローラ軸支用環状膨出部１１１の凹陥面１１１ｂの外径Ｗｚｏより大きく設定されており、内プレート１１０の段差部分、すなわち、ブシュ圧入孔を中心として膨出面１１１ａの外径Ｗｔｏよりも小径で凹陥面１１１ｂの外径Ｗｚｏよりも大径なプレート部分の断面係数がそれ以外のプレート部分の断面係数よりも大きくなって、チェーン稼動時に疲労破壊を生じがちな内プレート１１０の段差部分の強度を向上するようになっている。   As shown in FIG. 5, the outer diameter Wto of the bulging surface 111a of the roller shaft supporting annular bulging portion 111 is set larger than the outer diameter Wzo of the recessed surface 111b of the roller shaft supporting annular bulging portion 111. The step portion of the inner plate 110, that is, the section modulus of the plate portion smaller than the outer diameter Wto of the bulging surface 111a and larger than the outer diameter Wzo of the recessed surface 111b with the bush press-fitting hole as the center, It becomes larger than the section modulus and improves the strength of the stepped portion of the inner plate 110 that tends to cause fatigue failure during chain operation.

また、ローラ軸支用環状膨出部１１１の膨出面１１１ａの内径Ｗｔｉは、図５に示すように、ローラ軸支用環状膨出部１１１の凹陥面１１１ｂの内径Ｗｚｉより小さく設定されており、内プレート１１０に形成された段差部分、すなわち、ブシュ圧入孔を中心として膨出面１１１ａの内径Ｗｔｉよりも大径で凹陥面１１１ｂの内径Ｗｚｉよりも小径なプレート部分の断面係数が、それ以外のプレート部分の断面係数よりも大きくなるようになっている。   Further, the inner diameter Wti of the bulging surface 111a of the annular bulging portion 111 for roller shaft support is set smaller than the inner diameter Wzi of the concave surface 111b of the annular bulging portion 111 for roller shaft support, as shown in FIG. The step coefficient formed on the inner plate 110, that is, the section coefficient of the plate portion having a diameter larger than the inner diameter Wti of the bulging surface 111a and smaller than the inner diameter Wzi of the recessed surface 111b with the bush press-fitting hole as the center, The section modulus of the portion is larger.

ローラ軸支用環状膨出部１１１の内プレート１１０の内側面からの膨出量Ｄｔおよびローラ軸部１３１のローラ１３０の両端面からの突出量Ｄｋは、図５に示すように、Ｄｔ＜Ｄｋを満足するようにそれぞれ形成されており、図６に示すように、チェーン稼動時にローラ１３０が内プレート１１０に対してチェーン幅方向に片寄った際にも、摺接抵抗の小さいローラ軸部１３１の端面と内プレート１１０の内側面とが互いに接触して、摺接抵抗の大きいローラ軸支用環状膨出部１１１の膨出面１１１ａとローラ１３０の両端面とが接触することを完全に阻止するようになっている。   As shown in FIG. 5, the bulging amount Dt from the inner surface of the inner plate 110 of the annular bulging portion 111 for roller shaft support and the protruding amount Dk from both end surfaces of the roller 130 of the roller shaft portion 131 are Dt <Dk. As shown in FIG. 6, the roller shaft 131 having a small sliding contact resistance even when the roller 130 is offset in the chain width direction with respect to the inner plate 110 when the chain is operated. The end surface and the inner surface of the inner plate 110 are in contact with each other so that the bulging surface 111a of the roller shaft support annular bulging portion 111 having a large sliding contact resistance and the both end surfaces of the roller 130 are completely prevented from contacting each other. It has become.

ローラ軸支用環状膨出部１１１の内プレート１１０の内側面からの膨出量Ｄｔ、ローラ軸部１３１のローラ１３０の両端面からの突出量Ｄｋ、内プレート１１０の内側面の相互間隔Ｄｉおよびローラ１３０の幅Ｄｒは、図５に示すように、Ｄｉ−Ｄｔ＜Ｄｒ＋２Ｄｋ＜Ｄｉを満足するようにそれぞれ形成されており、図６に示すように、チェーン稼動時にローラ１３０が内プレート１１０に対してチェーン幅方向に片寄った際にも、ローラ軸部１３１がローラ軸支用環状膨出部１１１から外れることを防止するようになっている。   The amount of bulging Dt from the inner surface of the inner plate 110 of the annular bulging portion 111 for roller shaft support, the amount of protrusion Dk from the both end surfaces of the roller 130 of the roller shaft 131, the mutual distance Di between the inner surfaces of the inner plate 110, and As shown in FIG. 5, the width Dr of the roller 130 is formed so as to satisfy Di−Dt <Dr + 2Dk <Di. As shown in FIG. Thus, the roller shaft portion 131 is prevented from being detached from the roller shaft supporting annular bulging portion 111 even when it is offset in the chain width direction.

ローラ軸支用環状膨出部１１１の膨出面１１１ａの内径Ｗｔｉ、ローラ軸部１３１の外径Ｗｋ、ローラ１３０の内径Ｗｒおよびブシュ１２０の外径Ｗｂは、図５に示すように、Ｗｔｉ−Ｗｋ＞Ｗｒ−Ｗｂを満足するようにそれぞれ形成されており、図７に示すように、ローラ１３０がブシュ１２０に対してチェーン進行方向に片寄った際に、ローラ１３０の内周面とブシュ１２０の外周面とが接触して、ローラ軸部１３１の外周面とローラ軸支用環状膨出部１１１の内周面とが互いに接触することを完全に阻止するようになっている。   As shown in FIG. 5, the inner diameter Wti of the bulging surface 111a of the annular bulging portion 111 for roller shaft support, the outer diameter Wk of the roller shaft portion 131, the inner diameter Wr of the roller 130, and the outer diameter Wb of the bush 120 are Wti-Wk. > Wr−Wb, respectively, and when the roller 130 is offset in the chain traveling direction with respect to the bush 120, the inner surface of the roller 130 and the outer periphery of the bush 120 are formed as shown in FIG. The surface is in contact with the outer peripheral surface of the roller shaft 131 and the inner peripheral surface of the roller shaft supporting annular bulging portion 111 are completely prevented from contacting each other.

このようにして得られた本実施例の搬送用長寿命チェーン１００は、ローラ１３０の両端面から内プレート１１０に向けて突出形成した小径のローラ軸部１３１が、内プレート１１０の外側面を凹陥させてオフセット状態で内側面に膨出させたローラ軸支用環状膨出部１１１によりそれぞれ囲繞支持されている。
したがって、このようなローラ軸部１３１とローラ軸支用環状膨出部１１１と内プレート１１０の内側面との間に生じた潤滑油の漏出径路が複雑に屈曲して油溜り機能を発揮する油溜り用ラビリンス構造Ｌ１となって、チェーン走行時の周回走行によって生じる遠心力等に起因したローラ１３０とブシュ１２０との間に封入された潤滑油の外部漏出を抑制するとともに外部塵埃の侵入を抑制するので、チェーン走行時において搬送物を支持するとともに走行するチェーンを支持して摺動頻度が高く摩耗が進行し易いローラ１３０の内周面とブシュ１２０の外周面の摩耗損傷や焼付きを抑制できる。 The long-life chain 100 for conveyance according to the present embodiment obtained in this way has a small-diameter roller shaft portion 131 that protrudes from both end surfaces of the roller 130 toward the inner plate 110 and dents the outer surface of the inner plate 110. The roller shaft supporting annular bulging portions 111 are bulged to the inner side surface in an offset state, and are respectively supported by the surroundings.
Accordingly, the oil leakage function path is complicatedly bent between the roller shaft portion 131, the roller shaft supporting annular bulging portion 111, and the inner surface of the inner plate 110, so that the oil reservoir function is exhibited. becomes reservoir labyrinth structure L 1, the intrusion of external dust while suppressing external leakage of lubricating oil sealed between the roller 130 and the bushing 120 due to centrifugal force, etc. caused by the orbiting running when the chain is running Therefore, wear damage and seizure of the inner peripheral surface of the roller 130 and the outer peripheral surface of the bush 120 are supported while the chain is traveling and the traveling chain is supported and the sliding frequency is high and the wear easily proceeds. Can be suppressed.

ローラ軸支用環状膨出部１１１が、内プレート１１０の外側面を凹陥させて内側面に膨出させたオフセット状態で形成されている。
したがって、ローラ軸支用環状膨出部１１１の断面係数とそれ以外のプレート部分の断面係数とが同程度となるので、ローラ軸支用環状膨出部１１１を形成することによる内プレート１１０の強度低下を抑制できるとともに、内プレート１１０のプレス打ち抜き加工を行う際に、内プレート１１０の外側面を凹陥させて内側面へ膨出させる形状の金型を用いるだけで、内プレート１１０の打ち抜き加工とローラ軸支用環状膨出部１１１の形成加工とを同時に行うことができるので、内プレート１１０の打ち抜き加工とは別途にローラ軸支用環状膨出部１１１を形成する研削やミーリング等の機械加工を内プレート１１０に施す必要がなく、チェーンの製造負担を軽減できる。 The roller shaft support annular bulging portion 111 is formed in an offset state in which the outer surface of the inner plate 110 is recessed and bulged to the inner surface.
Accordingly, the section modulus of the roller shaft supporting annular bulging portion 111 and the section modulus of the other plate portions are approximately the same, so that the strength of the inner plate 110 by forming the roller shaft supporting annular bulging portion 111 is increased. It is possible to suppress the lowering, and when performing the punching process of the inner plate 110, it is possible to perform the punching process of the inner plate 110 only by using a mold having a shape in which the outer surface of the inner plate 110 is recessed and bulged to the inner surface. Since the forming process of the annular bulging portion 111 for roller shaft support can be performed simultaneously, machining such as grinding or milling for forming the annular bulging portion 111 for roller shaft support is performed separately from the punching processing of the inner plate 110. Is not required to be applied to the inner plate 110, and the manufacturing burden of the chain can be reduced.

また、内プレート１１０とローラ１３０との間には、従来のシールチェーンのような内リンクプレートとローラとの間に押圧状態で配置したシール部材を別部材として設けていないので、ローラ１３０の転動抵抗が小さく、チェーン稼動時にローラ１３０が円滑に転動しながらスプロケットに噛み合うとともに、チェーンの部品点数が少なくチェーン切り継ぎ等の分解組み付け作業が容易である。
また、従来のシールチェーンでは、シール部材の摺接摩耗を防止して潤滑油の密封性を維持するために、内リンクプレートの内側面とローラの端面に表面粗さを小さくする表面仕上げ加工を施す必要があったが、本発明の搬送用長寿命チェーン１００では、従来のような表面仕上げ加工を施す必要がなく、チェーンの製造負担を軽減できる。 Further, since a seal member arranged in a pressed state between the inner link plate and the roller, such as a conventional seal chain, is not provided between the inner plate 110 and the roller 130 as a separate member. The dynamic resistance is small, and the roller 130 meshes with the sprocket while rolling smoothly when the chain is in operation, and the number of parts of the chain is small, and disassembly and assembly work such as chain cut-off is easy.
In addition, in the conventional seal chain, in order to prevent sliding contact wear of the seal member and maintain the sealing performance of the lubricating oil, surface finishing processing is performed to reduce the surface roughness on the inner surface of the inner link plate and the end surface of the roller. However, in the long-life chain 100 for conveyance according to the present invention, it is not necessary to perform surface finishing as in the conventional case, and the manufacturing burden of the chain can be reduced.

ブシュ１２０が、潤滑油を含浸させた焼結含油金属材料から成形されている。
したがって、ローラ１３０の内周面とブシュ１２０の外周面との間に潤滑油が充分に供給されてない状態となっても、ブシュ１２０が優れた潤滑油の徐放性を発揮して、すなわち、チェーン稼動時の周回走行によって生じる遠心力等に起因してブシュ１２０の内部に形成された無数の気孔１２１に含浸された潤滑油がローラ１３０の内周面とブシュ１２０の外周面との間に徐々に滲み出すので、ローラ１３０の内周面とブシュ１２０の外周面との間の摺接摩耗を低減でき、また、焼結含油金属材料からなるブシュ１２０は何らの加工を施していない通常のブシュと同形状を呈しており、通常のブシュと同様に取り扱うことができるので、チェーン切り継ぎなどの分解組み付け作業を簡便に達成できる。 The bush 120 is formed from a sintered oil-impregnated metal material impregnated with a lubricating oil.
Therefore, even when the lubricating oil is not sufficiently supplied between the inner peripheral surface of the roller 130 and the outer peripheral surface of the bush 120, the bush 120 exhibits an excellent lubricating oil release property, that is, The lubricating oil impregnated in the countless pores 121 formed inside the bush 120 due to centrifugal force or the like generated by the circular running during the chain operation is between the inner peripheral surface of the roller 130 and the outer peripheral surface of the bush 120. As a result, the sliding contact wear between the inner peripheral surface of the roller 130 and the outer peripheral surface of the bush 120 can be reduced, and the bush 120 made of a sintered oil-impregnated metal material is usually not subjected to any processing. Since it has the same shape as a bush and can be handled in the same way as a normal bush, disassembly and assembly work such as chain cutting can be easily achieved.

ローラ軸支用環状膨出部１１１の膨出面１１１ａの外径Ｗｔｏが、ローラ軸支用環状膨出部１１１の凹陥面１１１ｂの外径Ｗｚｏより大きく設定されている。
したがって、内プレート１１０に形成された段差部分、すなわち、ブシュ圧入孔を中心として凹陥面１１１ｂの外径Ｗｚｏよりも大径で膨出面１１１ａの外径Ｗｔｏよりも小径なプレート部分の断面係数が、それ以外のプレート部分の断面係数よりも大きくなるので、チェーン稼動時に疲労破壊を生じがちな内プレート１１０の段差部分の強度を向上できる。 The outer diameter Wto of the bulging surface 111a of the roller shaft supporting annular bulging portion 111 is set larger than the outer diameter Wzo of the recessed surface 111b of the roller shaft supporting annular bulging portion 111.
Therefore, the step portion formed in the inner plate 110, that is, the section coefficient of the plate portion having a diameter larger than the outer diameter Wzo of the recessed surface 111b and smaller than the outer diameter Wto of the bulging surface 111a around the bush press-fitting hole, Since it becomes larger than the section modulus of other plate portions, the strength of the stepped portion of the inner plate 110 that tends to cause fatigue failure during chain operation can be improved.

ローラ軸支用環状膨出部１１１の膨出面１１１ａの内径Ｗｔｉが、ローラ軸支用環状膨出部１１１の凹陥面１１１ｂの内径Ｗｚｉより小さく設定されている。
したがって、内プレート１１０に形成された段差部分、すなわち、ブシュ圧入孔を中心として膨出面１１１ａの内径Ｗｔｉよりも大径で凹陥面１１１ｂの内径Ｗｚｉよりも小径なプレート部分の断面係数が、それ以外のプレート部分の断面係数よりも大きくなるので、チェーン稼動時に疲労破壊を生じがちな内プレート１１０の段差部分の強度を向上できる。 An inner diameter Wti of the bulging surface 111a of the roller shaft supporting annular bulging portion 111 is set smaller than an inner diameter Wzi of the recessed surface 111b of the roller shaft supporting annular bulging portion 111.
Therefore, the step coefficient formed in the inner plate 110, that is, the section coefficient of the plate portion having a diameter larger than the inner diameter Wti of the bulging surface 111a and smaller than the inner diameter Wzi of the recessed surface 111b around the bush press-fitting hole, Therefore, the strength of the stepped portion of the inner plate 110 that tends to cause fatigue failure during chain operation can be improved.

ローラ軸支用環状膨出部１１１の膨出面１１１ａとローラ１３０の両端面が、相互に近接対向するラビリンス構造形成粗面１１２、１３２を備えている。
したがって、ローラ軸支用環状膨出部１１１の膨出面１１１ａとローラ１３０の両端面との間には油溜り用ラビリンス構造Ｌ２が形成されているので、ローラ１３０の内周面とブシュ１２０の外周面との間に注入された潤滑油のシール効果をより一層向上させることができ、ローラ１３０の内周面とブシュ１２０の外周面との間に注入された潤滑油の外部漏出および外部塵埃の侵入を防止できる。 The bulging surface 111a of the roller shaft supporting annular bulging portion 111 and both end surfaces of the roller 130 are provided with labyrinth structure forming rough surfaces 112 and 132 that are close to each other.
Therefore, the oil reservoir labyrinth structure L 2 is formed between the bulging surface 111 a of the roller shaft supporting annular bulging portion 111 and both end surfaces of the roller 130, so that the inner peripheral surface of the roller 130 and the bush 120 The sealing effect of the lubricating oil injected between the outer peripheral surface and the outer peripheral surface of the roller 130 and the outer peripheral surface of the bush 120 can be further improved. Can be prevented from entering.

ローラ軸支用環状膨出部１１１の内プレート１１０の内側面からの膨出量Ｄｔおよびローラ軸部１３１のローラ１３０の両端面からの突出量Ｄｋが、Ｄｔ＜Ｄｋを満足するようにそれぞれ形成されている。
したがって、チェーン稼動時にローラ１３０が内プレート１１０に対してチェーン幅方向に片寄った際にも、摺接抵抗の小さいローラ軸部１３１の端面と内プレート１１０の内側面とが互いに接触して、摺接抵抗の大きいローラ軸支用環状膨出部１１１の膨出面１１１ａとローラ１３０の両端面とが接触することを完全に阻止するので、ローラ１３０の転動抵抗が小さく、チェーン稼動時にローラ１３０が円滑に転動しながらスプロケットに噛み合うため、チェーンの摩耗を防止できる。 The bulging amount Dt from the inner surface of the inner plate 110 of the annular bulging portion 111 for roller shaft support and the protruding amount Dk from both end surfaces of the roller shaft 131 of the roller shaft 131 are formed so as to satisfy Dt <Dk. Has been.
Therefore, even when the roller 130 is displaced in the chain width direction with respect to the inner plate 110 during the chain operation, the end surface of the roller shaft portion 131 having a small sliding resistance and the inner side surface of the inner plate 110 come into contact with each other, Since the contact between the bulging surface 111a of the roller shaft supporting annular bulging portion 111 having a large contact resistance and both end surfaces of the roller 130 is completely prevented, the rolling resistance of the roller 130 is small, and the roller 130 is Since it meshes with the sprocket while rolling smoothly, chain wear can be prevented.

ローラ軸支用環状膨出部１１１の内プレート１１０の内側面からの膨出量Ｄｔ、ローラ軸部１３１のローラ１３０の両端面からの突出量Ｄｋ、内プレート１１０の内側面の相互間隔Ｄｉおよびローラ１３０の幅Ｄｒが、Ｄｉ−Ｄｔ＜Ｄｒ＋２Ｄｋ＜Ｄｉを満足するようにそれぞれ形成されている。
したがって、チェーン稼動時にローラ１３０が内プレート１１０に対してチェーン幅方向に片寄った際にも、ローラ軸部１３１がローラ軸支用環状膨出部１１１から外れることを阻止して潤滑油の外部漏出を防止するので、ブシュ１２０の外周面とローラ１３０の内周面の摺接摩耗や焼付きを抑制できる。 The amount of bulging Dt from the inner surface of the inner plate 110 of the annular bulging portion 111 for roller shaft support, the amount of protrusion Dk from the both end surfaces of the roller 130 of the roller shaft 131, the mutual distance Di between the inner surfaces of the inner plate 110, and The width Dr of the roller 130 is formed so as to satisfy Di−Dt <Dr + 2Dk <Di.
Accordingly, even when the roller 130 is offset in the chain width direction with respect to the inner plate 110 during the operation of the chain, the roller shaft 131 is prevented from coming off from the annular bulging portion 111 for supporting the roller shaft. Therefore, sliding wear and seizure between the outer peripheral surface of the bush 120 and the inner peripheral surface of the roller 130 can be suppressed.

ローラ軸支用環状膨出部１１１の膨出面１１１ａの内径Ｗｔｉ、ローラ軸部１３１の外径Ｗｋ、ローラ１３０の内径Ｗｒおよびブシュ１２０の外径Ｗｂが、Ｗｔｉ−Ｗｋ＞Ｗｒ−Ｗｂを満足するようにそれぞれ形成されている。
したがって、ローラ１３０がブシュ１２０に対してチェーン進行方向に片寄った際に、ローラ１３０の内周面とブシュ１２０の外周面とが接触して、ローラ軸部１３１の外周面とローラ軸支用環状膨出部１１１の内周面とが互いに接触することを完全に阻止するので、ローラ軸部１３１の外周面とローラ軸支用環状膨出部１１１の内周面との摺動接触に起因する摩耗粉がローラ１３０の内周面とブシュ１２０の外周面との間に侵入して、このような摩耗粉が研摩剤となってローラ１３０の内周面とブシュ１２０の外周面との間で生じがちな異常な摩耗損傷を防止できるなど、その効果は甚大である。 The inner diameter Wti of the bulging surface 111a of the annular bulging portion 111 for roller shaft support, the outer diameter Wk of the roller shaft portion 131, the inner diameter Wr of the roller 130, and the outer diameter Wb of the bush 120 satisfy Wti−Wk> Wr−Wb. Are formed respectively.
Therefore, when the roller 130 is offset in the chain traveling direction with respect to the bush 120, the inner peripheral surface of the roller 130 and the outer peripheral surface of the bush 120 come into contact with each other, and the outer peripheral surface of the roller shaft portion 131 and the ring for supporting the roller shaft This completely prevents the inner peripheral surface of the bulging portion 111 from coming into contact with each other, and is caused by sliding contact between the outer peripheral surface of the roller shaft portion 131 and the inner peripheral surface of the annular bulging portion 111 for supporting the roller shaft. Wear powder penetrates between the inner peripheral surface of the roller 130 and the outer peripheral surface of the bush 120, and such wear powder becomes an abrasive between the inner peripheral surface of the roller 130 and the outer peripheral surface of the bush 120. The effect is enormous, such as preventing abnormal wear damage that tends to occur.

つぎに、本発明の第２実施例である搬送用長寿命チェーン２００について、図８および図９に基づいて説明する。
まず、本発明の第２実施例である搬送用長寿命チェーン２００は、図８および図９に示すように、左右一対で離間配置された内プレート２１０と、内プレート２１０のブシュ圧入孔に圧入嵌合された前後一対のブシュ２２０と、ブシュ２２０に回転自在に外嵌された前後一対のローラ２３０と、ブシュ２２０の内部に回転自在に挿通された前後一対の連結ピン２４０と、連結ピン２４０の両端をピン孔に圧入嵌合して内プレート２１０をチェーン長手方向に連結する左右一対で離間配置された外プレート２５０とを備えている。
そして、ローラ２３０の内周面とブシュ２２０の外周面との間に、潤滑油が封入されている。 Next, a conveying long-life chain 200 according to a second embodiment of the present invention will be described with reference to FIGS.
First, as shown in FIGS. 8 and 9, the long-life chain 200 for conveyance according to the second embodiment of the present invention is press-fitted into a pair of left and right inner plates 210 and a bush press-fitting hole of the inner plate 210. A pair of front and rear bushes 220 that are fitted, a pair of front and rear rollers 230 that are rotatably fitted to the bush 220, a pair of front and rear connection pins 240 that are rotatably inserted into the bush 220, and a connection pin 240 And a pair of left and right outer plates 250 that press-fit and fit both ends into pin holes to connect the inner plate 210 in the longitudinal direction of the chain.
The lubricating oil is sealed between the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220.

そこで、本実施例の搬送用長寿命チェーン２００が最も特徴とする内プレート２１０、ブシュ２２０、およびローラ２３０の具体的な形態について図８および図９により詳しく説明する。
まず、図８および図９に示すように、内プレート２１０には、外側面を凹陥させて、すなわち、凹ませて陥らせてオフセット状態で内側面に膨出させたローラ軸支用環状膨出部２１１が形成されており、このローラ軸支用環状膨出部２１１にローラ２３０の両端面から内プレート２１０に向けて突出形成した小径のローラ軸部２３１がそれぞれ囲繞支持されている。
なお、本発明の搬送用長寿命チェーン２００で言うところの「オフセット状態」とは、ローラ軸支用環状膨出部２１１とそれ以外のプレート部分とがずれて段差状を呈している状態を意味している。 Therefore, specific forms of the inner plate 210, the bush 220, and the roller 230, which are the most characteristic features of the conveying long-life chain 200 of this embodiment, will be described in detail with reference to FIGS.
First, as shown in FIGS. 8 and 9, the inner plate 210 has an outer surface recessed, that is, an annular bulge for supporting a roller shaft that is recessed and bulged to the inner surface in an offset state. A portion 211 is formed, and a small-diameter roller shaft portion 231 formed so as to protrude from both end surfaces of the roller 230 toward the inner plate 210 is surrounded and supported on the roller shaft support annular bulging portion 211.
The “offset state” in the long life chain 200 for conveyance of the present invention means a state in which the annular bulging portion 211 for supporting the roller shaft and the other plate portion are shifted to form a stepped shape. is doing.

ブシュ２２０は、焼結含油金属材料、すなわち、その内部に無数の気孔を有するように金属粉末を圧縮成形して融解点以下の温度で焼結することで得られた多孔質材に潤滑油を含浸させた金属材料から成形されており、そのため、チェーン稼動時の周回走行によって生じる遠心力等に起因してブシュ２２０の内部に形成された無数の気孔に含浸された潤滑油がローラ２３０の内周面とブシュ２２０の外周面との間に徐々に滲み出すようになっている。
なお、この焼結含油金属材料は、鉄、銅、ニッケル、クロムモリブデン鋼などを配合してなる混合金属粉末を圧縮形成するとともに６．０ｇ／ｃｍ３〜７．０ｇ／ｃｍ３の焼結密度で焼結することで成形されており、そのため、ブシュ２２０は、チェーン張力に起因する剪断力および衝撃力を受けるための強靱性能と、多くの潤滑油を含浸させて長期に亘ってローラ２３０とブシュ２２０との間に潤滑油を供給する含油性能および徐放性能の両方をバランス良く兼ね備えて充分に発揮するようになっている。
また、本実施例の搬送用長寿命チェーン２００では、潤滑油としてポリαオレフィンやポリオールエステルなどの合成系炭化水素を基油とする合成油を採用しており、優れた粘性、潤滑性、耐劣化性を発揮して、ブシュ２２０の内部に形成された気孔に目詰まりを生じさせることなくブシュ２２０の気孔から長期に亘って安定してローラ２３０とブシュ２２０との間に滲み出て摺接摩耗を抑制するようになっている。 The bushing 220 is made of a sintered oil-impregnated metal material, that is, a lubricating material applied to a porous material obtained by compression-molding a metal powder so as to have countless pores therein and sintering it at a temperature below the melting point. It is formed from the impregnated metal material. Therefore, the lubricating oil impregnated in the countless pores formed in the bush 220 due to the centrifugal force generated by the circular traveling during the chain operation is contained in the roller 230. It gradually oozes between the peripheral surface and the outer peripheral surface of the bush 220.
Incidentally, the sintered density of the sintered oil-impregnated metallic material, iron, copper, nickel, 6.0g / cm 3 ~7.0g / cm 3 with compressed form the mixed metal powder obtained by blending such as chromium molybdenum steel Therefore, the bushing 220 has a tough performance for receiving a shearing force and an impact force due to chain tension, and a roller 230 that is impregnated with a lot of lubricating oil over a long period of time. Both the oil impregnation performance for supplying the lubricating oil to the bushing 220 and the sustained release performance are well balanced and fully exerted.
Moreover, in the long-life chain 200 for conveyance of this embodiment, a synthetic oil based on a synthetic hydrocarbon such as poly-α-olefin or polyol ester is used as the lubricating oil, and has excellent viscosity, lubricity, and resistance. Exhibits degradation and oozes between the roller 230 and the bushing 220 in a stable manner over a long period of time without causing clogging of the pores formed inside the bushing 220 and sliding contact. Wear is suppressed.

ブシュ２２０の外周面には、図８および図９に示すように、ローラ２３０の内周面とブシュ２２０の外周面との間に潤滑油を供給するＤカット形状の油溜り溝２２２が２つ刻設されており、より多くの潤滑油を封入してローラ２３０の内周面とブシュ２２０の外周面との間に潤滑油を継続的に供給するようになっている。   As shown in FIGS. 8 and 9, two D-cut oil sump grooves 222 for supplying lubricating oil between the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220 are provided on the outer peripheral surface of the bush 220. It is engraved and encloses more lubricating oil so that the lubricating oil is continuously supplied between the inner peripheral surface of the roller 230 and the outer peripheral surface of the bushing 220.

ローラ軸支用環状膨出部２１１の膨出面２１１ａとローラ２３０の両端面は、図９に示すように、梨地状のラビリンス構造形成粗面２１２、２３２をそれぞれ有しており、このラビリンス構造形成粗面２１２、２３２は、相互に近接対向してローラ軸支用環状膨出部２１１の膨出面２１１ａとローラ２３０の両端面との間に油溜り用ラビリンス構造Ｌ２を形成して、ローラ２３０とブシュ２２０との間に注入された潤滑油の外部漏出を抑制するとともに外部塵埃の侵入を防止するようになっている。 As shown in FIG. 9, the bulging surface 211 a of the roller shaft supporting annular bulging portion 211 and both end surfaces of the roller 230 have a matte surface labyrinth structure forming rough surfaces 212 and 232, respectively. The rough surfaces 212 and 232 are opposed to each other so as to form an oil reservoir labyrinth structure L 2 between the bulging surface 211 a of the annular bulging portion 211 for supporting the roller shaft and both end surfaces of the roller 230. And external leakage of the lubricating oil injected between the bushing 220 and the bush 220 are prevented and intrusion of external dust is prevented.

ローラ軸支用環状膨出部２１１の膨出面２１１ａの外径は、ローラ軸支用環状膨出部２１１の凹陥面２１１ｂの外径より大きく設定されており、内プレート２１０の段差部分、すなわち、ブシュ圧入孔を中心として膨出面２１１ａよりも小径で凹陥面２１１ｂよりも大径なプレート部分の断面係数がそれ以外のプレート部分の断面係数よりも大きくなって、チェーン稼動時に疲労破壊を生じがちな内プレート２１０の段差部分の強度を向上するようになっている。   The outer diameter of the bulging surface 211a of the roller shaft supporting annular bulging portion 211 is set to be larger than the outer diameter of the recessed surface 211b of the roller shaft supporting annular bulging portion 211. The section modulus of the plate portion having a diameter smaller than the bulging surface 211a and larger than the recessed surface 211b with the bush press-fit hole as the center is larger than the section modulus of the other plate portions, which tends to cause fatigue failure during chain operation. The strength of the step portion of the inner plate 210 is improved.

また、ローラ軸支用環状膨出部２１１の膨出面２１１ａの内径は、ローラ軸支用環状膨出部２１１の凹陥面２１１ｂの内径より小さく設定されており、内プレート２１０に形成された段差部分、すなわち、ブシュ圧入孔を中心として膨出面２１１ａの内径よりも大径で凹陥面２１１ｂの内径よりも小径なプレート部分の断面係数が、それ以外のプレート部分の断面係数よりも大きくなるようになっている。   In addition, the inner diameter of the bulging surface 211 a of the roller shaft supporting annular bulging portion 211 is set to be smaller than the inner diameter of the recessed surface 211 b of the roller shaft supporting annular bulging portion 211, and a step portion formed on the inner plate 210. That is, the section modulus of the plate portion having a diameter larger than the inner diameter of the bulging surface 211a and smaller than the inner diameter of the recessed surface 211b with the bush press-fitting hole as the center is larger than the section modulus of the other plate portions. ing.

ローラ軸支用環状膨出部２１１の内プレート２１０の内側面からの膨出量Ｄｔおよびローラ軸部２３１のローラ２３０の両端面からの突出量Ｄｋは、Ｄｔ＜Ｄｋを満足するようにそれぞれ形成されており、チェーン稼動時にローラ２３０が内プレート２１０に対してチェーン幅方向に片寄った際にも、摺接抵抗の小さいローラ軸部２３１の端面と内プレート２１０の内側面とが互いに接触して、摺接抵抗の大きいローラ軸支用環状膨出部２１１の膨出面２１１ａとローラ２３０の両端面とが接触することを完全に阻止するようになっている。   The bulging amount Dt from the inner surface of the inner plate 210 of the annular bulging portion 211 for roller shaft support and the protruding amount Dk from the both end surfaces of the roller 230 of the roller shaft portion 231 are formed so as to satisfy Dt <Dk. Even when the roller 230 is offset in the chain width direction with respect to the inner plate 210 during the chain operation, the end surface of the roller shaft portion 231 having a small sliding resistance and the inner surface of the inner plate 210 are in contact with each other. Further, the bulging surface 211a of the roller shaft supporting annular bulging portion 211 having a large sliding contact resistance is completely prevented from coming into contact with both end surfaces of the roller 230.

ローラ軸支用環状膨出部２１１の内プレート２１０の内側面からの膨出量Ｄｔ、ローラ軸部２３１のローラ２３０の両端面からの突出量Ｄｋ、内プレート２１０の内側面の相互間隔Ｄｉおよびローラ２３０の幅Ｄｒは、Ｄｉ−Ｄｔ＜Ｄｒ＋２Ｄｋ＜Ｄｉを満足するようにそれぞれ形成されており、チェーン稼動時にローラ２３０が内プレート２１０に対してチェーン幅方向に片寄った際にも、ローラ軸部２３１がローラ軸支用環状膨出部２１１から外れることを防止するようになっている。   The amount of bulging Dt from the inner surface of the inner plate 210 of the annular bulging portion 211 for roller shaft support, the amount of protrusion Dk from both end surfaces of the roller 230 of the roller shaft 231, the mutual distance Di between the inner surfaces of the inner plate 210, The width Dr of the roller 230 is formed so as to satisfy Di−Dt <Dr + 2Dk <Di, and even when the roller 230 is offset in the chain width direction with respect to the inner plate 210 during the chain operation, the roller shaft portion 231 is prevented from coming off from the roller shaft supporting annular bulging portion 211.

ローラ軸支用環状膨出部２１１の膨出面２１１ａの内径Ｗｔｉ、ローラ軸部２３１の外径Ｗｋ、ローラ２３０の内径Ｗｒおよびブシュ２２０の外径Ｗｂは、Ｗｔｉ−Ｗｋ＞Ｗｒ−Ｗｂを満足するようにそれぞれ形成されており、ローラ２３０がブシュ２２０に対してチェーン進行方向に片寄った際に、ローラ２３０の内周面とブシュ２２０の外周面とが接触して、ローラ軸部２３１の外周面とローラ軸支用環状膨出部２１１の内周面とが互いに接触することを完全に阻止するようになっている。   The inner diameter Wti of the bulging surface 211a of the annular bulging portion 211 for roller shaft support, the outer diameter Wk of the roller shaft portion 231, the inner diameter Wr of the roller 230, and the outer diameter Wb of the bushing 220 satisfy Wti−Wk> Wr−Wb. When the roller 230 is offset in the chain traveling direction with respect to the bush 220, the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220 come into contact with each other, and the outer peripheral surface of the roller shaft portion 231 is formed. And the inner peripheral surface of the roller shaft supporting annular bulge 211 are completely prevented from contacting each other.

このようにして得られた本実施例の搬送用長寿命チェーン２００は、ローラ２３０の両端面から内プレート２１０に向けて突出形成した小径のローラ軸部２３１が、内プレート２１０の外側面を凹陥させてオフセット状態で内側面に膨出させたローラ軸支用環状膨出部２１１によりそれぞれ囲繞支持されている。
したがって、このようなローラ軸部２３１とローラ軸支用環状膨出部２１１と内プレート２１０の内側面との間に生じた潤滑油の漏出径路が複雑に屈曲して油溜り機能を発揮する油溜り用ラビリンス構造Ｌ１となって、チェーン走行時の周回走行によって生じる遠心力等に起因したローラ２３０とブシュ２２０との間に封入された潤滑油の外部漏出を抑制するとともに外部塵埃の侵入を抑制するので、チェーン走行時において搬送物を支持するとともに走行するチェーンを支持して摺動頻度が高く摩耗が進行し易いローラ２３０の内周面とブシュ２２０の外周面の摩耗損傷や焼付きを抑制できる。 The long-life chain 200 for conveyance according to the present embodiment obtained in this way has a small-diameter roller shaft portion 231 formed so as to protrude from both end surfaces of the roller 230 toward the inner plate 210, and the outer surface of the inner plate 210 is recessed. The roller shaft supporting annular bulging portions 211 are bulged to the inner side surface in an offset state, and are respectively supported by the surroundings.
Therefore, the lubricating oil leakage path generated between the roller shaft portion 231, the roller shaft supporting annular bulging portion 211, and the inner surface of the inner plate 210 is complicatedly bent to exhibit an oil reservoir function. The pool labyrinth structure L 1 prevents external leakage of the lubricating oil enclosed between the roller 230 and the bushing 220 due to centrifugal force generated by the circular travel during chain travel, and prevents external dust from entering. Therefore, wear damage and seizure of the inner peripheral surface of the roller 230 and the outer peripheral surface of the bushing 220 that support the transported object during the traveling of the chain and support the traveling chain and wear easily progresses frequently. Can be suppressed.

ローラ軸支用環状膨出部２１１が、内プレート２１０の外側面を凹陥させて内側面に膨出させたオフセット状態で形成されている。
したがって、ローラ軸支用環状膨出部２１１の断面係数とそれ以外のプレート部分の断面係数とが同程度となるので、ローラ軸支用環状膨出部２１１を形成することによる内プレート２１０の強度低下を抑制できるとともに、内プレート２１０のプレス打ち抜き加工を行う際に、内プレート２１０の外側面を凹陥させて内側面へ膨出させる形状の金型を用いるだけで、内プレート２１０の打ち抜き加工とローラ軸支用環状膨出部２１１の形成加工とを同時に行うことができるので、内プレート２１０の打ち抜き加工とは別途にローラ軸支用環状膨出部２１１を形成する研削やミーリング等の機械加工を内プレート２１０に施す必要がなく、チェーンの製造負担を軽減できる。 The roller shaft support annular bulging portion 211 is formed in an offset state in which the outer surface of the inner plate 210 is recessed and bulged to the inner surface.
Accordingly, the section modulus of the roller shaft supporting annular bulging portion 211 and the section modulus of the other plate portions are approximately the same, so that the strength of the inner plate 210 by forming the roller shaft supporting annular bulging portion 211 is increased. It is possible to suppress the lowering, and when performing the punching process of the inner plate 210, it is possible to perform the punching process of the inner plate 210 only by using a mold having a shape in which the outer surface of the inner plate 210 is recessed and bulged to the inner surface. Since the forming process of the annular bulging portion 211 for the roller shaft support can be performed simultaneously, machining such as grinding or milling for forming the annular bulging portion 211 for the roller shaft is performed separately from the punching processing of the inner plate 210. Is not required to be applied to the inner plate 210, and the manufacturing burden of the chain can be reduced.

また、内プレート２１０とローラ２３０との間には、従来のシールチェーンのような内リンクプレートとローラとの間に押圧状態で配置したシール部材を別部材として設けていないので、ローラ２３０の転動抵抗が小さく、チェーン稼動時にローラ２３０が円滑に転動しながらスプロケットに噛み合うとともに、チェーンの部品点数が少なくチェーン切り継ぎ等の分解組み付け作業が容易である。
また、従来のシールチェーンでは、シール部材の摺接摩耗を防止して潤滑油の密封性を維持するために、内リンクプレートの内側面とローラの端面に表面粗さを小さくする表面仕上げ加工を施す必要があったが、本発明の搬送用長寿命チェーン２００では、従来のような表面仕上げ加工を施す必要がなく、チェーンの製造負担を軽減できる。 Further, since a seal member disposed in a pressed state between the inner link plate and the roller, such as a conventional seal chain, is not provided between the inner plate 210 and the roller 230 as a separate member, the roller 230 is not rotated. The dynamic resistance is small, and the roller 230 meshes with the sprocket while rolling smoothly when the chain is in operation, and the number of parts of the chain is small and disassembly and assembly work such as chain cut-off is easy.
In addition, in the conventional seal chain, in order to prevent sliding contact wear of the seal member and maintain the sealing performance of the lubricating oil, surface finishing processing is performed to reduce the surface roughness on the inner surface of the inner link plate and the end surface of the roller. However, in the long-life chain 200 for conveyance according to the present invention, it is not necessary to perform surface finishing as in the conventional case, and the manufacturing burden of the chain can be reduced.

ブシュ２２０が、潤滑油を含浸させた焼結含油金属材料から成形されている。
したがって、ローラ２３０の内周面とブシュ２２０の外周面との間に潤滑油が充分に供給されてない状態となっても、ブシュ２２０が優れた潤滑油の徐放性を発揮して、すなわち、チェーン稼動時の周回走行によって生じる遠心力等に起因してブシュ２２０の内部に形成された無数の気孔に含浸された潤滑油がローラ２３０の内周面とブシュ２２０の外周面との間に徐々に滲み出すので、ローラ２３０の内周面とブシュ２２０の外周面との間の摺接摩耗を低減でき、また、焼結含油金属材料からなるブシュ２２０は何らの加工を施していない通常のブシュと同形状を呈しており、通常のブシュと同様に取り扱うことができるので、チェーン切り継ぎなどの分解組み付け作業を簡便に達成できる。 The bush 220 is formed from a sintered oil-impregnated metal material impregnated with a lubricating oil.
Therefore, even when the lubricating oil is not sufficiently supplied between the inner peripheral surface of the roller 230 and the outer peripheral surface of the bushing 220, the bushing 220 exhibits an excellent lubricating oil release property, that is, The lubricating oil impregnated in countless pores formed in the bushing 220 due to centrifugal force generated by the circular running during the chain operation is between the inner circumferential surface of the roller 230 and the outer circumferential surface of the bushing 220. Since it oozes out gradually, the sliding wear between the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220 can be reduced, and the bush 220 made of a sintered oil-impregnated metal material is not subjected to any processing. Since it has the same shape as the bush and can be handled in the same way as a normal bush, disassembly and assembly work such as chain cut-off can be easily achieved.

ローラ２３０の内周面とブシュ２２０の外周面との間に潤滑剤を供給する油溜り溝２２２が、ブシュ２２０の外周面に刻設されている。
したがって、より多くの潤滑油を封入してローラ２３０の内周面とブシュ２２０の外周面との間に潤滑油を継続的に供給するので、ローラ２３０の内周面とブシュ２２０の外周面の摺接摩耗を長期に亘って低減でき、ローラ２３０とブシュ２２０との間で発生する摺動音や焼付きを防止できるとともに、スプロケットとの噛み合い時にローラ２３０が円滑に転動しながら噛み合うため、チェーンの摩耗を防止できる。 An oil sump groove 222 for supplying a lubricant between the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220 is formed on the outer peripheral surface of the bush 220.
Therefore, since more lubricating oil is enclosed and lubricating oil is continuously supplied between the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220, the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220 are The sliding contact wear can be reduced over a long period of time, sliding noise and seizure occurring between the roller 230 and the bushing 220 can be prevented, and the roller 230 meshes while smoothly rolling when meshing with the sprocket. Chain wear can be prevented.

ローラ軸支用環状膨出部２１１の膨出面２１１ａの外径が、ローラ軸支用環状膨出部２１１の凹陥面２１１ｂの外径より大きく設定されている。
したがって、内プレート２１０に形成された段差部分、すなわち、ブシュ圧入孔を中心として凹陥面２１１ｂの外径よりも大径で膨出面２１１ａの外径よりも小径なプレート部分の断面係数が、それ以外のプレート部分の断面係数よりも大きくなるので、チェーン稼動時に疲労破壊を生じがちな内プレート２１０の段差部分の強度を向上できる。 The outer diameter of the bulging surface 211 a of the roller shaft supporting annular bulging portion 211 is set larger than the outer diameter of the recessed surface 211 b of the roller shaft supporting annular bulging portion 211.
Accordingly, the step portion formed in the inner plate 210, that is, the section coefficient of the plate portion having a diameter larger than the outer diameter of the recessed surface 211b and smaller than the outer diameter of the bulging surface 211a around the bush press-fitting hole, Therefore, the strength of the step portion of the inner plate 210 that tends to cause fatigue failure during chain operation can be improved.

ローラ軸支用環状膨出部２１１の膨出面２１１ａの内径が、ローラ軸支用環状膨出部２１１の凹陥面２１１ｂの内径より小さく設定されている。
したがって、内プレート２１０に形成された段差部分、すなわち、ブシュ圧入孔を中心として膨出面２１１ａの内径よりも大径で凹陥面２１１ｂの内径よりも小径なプレート部分の断面係数が、それ以外のプレート部分の断面係数よりも大きくなるので、チェーン稼動時に疲労破壊を生じがちな内プレート２１０の段差部分の強度を向上できる。 An inner diameter of the bulging surface 211 a of the roller shaft supporting annular bulging portion 211 is set smaller than an inner diameter of the recessed surface 211 b of the roller shaft supporting annular bulging portion 211.
Therefore, the step portion formed in the inner plate 210, that is, the section coefficient of the plate portion having a diameter larger than the inner diameter of the bulging surface 211a and smaller than the inner diameter of the recessed surface 211b around the bush press-fitting hole, Since it becomes larger than the section modulus of the portion, it is possible to improve the strength of the stepped portion of the inner plate 210 that tends to cause fatigue failure during chain operation.

ローラ軸支用環状膨出部２１１の膨出面２１１ａとローラ２３０の両端面が、相互に近接対向するラビリンス構造形成粗面２１２、２３２を備えている。
したがって、ローラ軸支用環状膨出部２１１の膨出面２１１ａとローラ２３０の両端面との間には油溜り用ラビリンス構造Ｌ２が形成されているので、ローラ２３０の内周面とブシュ２２０の外周面との間に注入された潤滑油のシール効果をより一層向上させることができ、ローラ２３０の内周面とブシュ２２０の外周面との間に注入された潤滑油の外部漏出および外部塵埃の侵入を防止できる。 The bulging surface 211a of the roller shaft supporting annular bulging portion 211 and both end surfaces of the roller 230 are provided with labyrinth structure forming rough surfaces 212 and 232 that face each other in close proximity.
Therefore, the oil reservoir labyrinth structure L 2 is formed between the bulging surface 211 a of the roller shaft supporting annular bulging portion 211 and both end surfaces of the roller 230, so that the inner peripheral surface of the roller 230 and the bush 220 The sealing effect of the lubricating oil injected between the outer peripheral surface and the outer peripheral surface of the roller 230 and the outer peripheral surface of the bush 220 can be further improved. Can be prevented from entering.

ローラ軸支用環状膨出部２１１の内プレート２１０の内側面からの膨出量Ｄｔおよびローラ軸部２３１のローラ２３０の両端面からの突出量Ｄｋが、Ｄｔ＜Ｄｋを満足するようにそれぞれ形成されている。
したがって、チェーン稼動時にローラ２３０が内プレート２１０に対してチェーン幅方向に片寄った際にも、摺接抵抗の小さいローラ軸部２３１の端面と内プレート２１０の内側面とが互いに接触して、摺接抵抗の大きいローラ軸支用環状膨出部２１１の膨出面２１１ａとローラ２３０の両端面とが接触することを完全に阻止するので、ローラ２３０の転動抵抗が小さく、チェーン稼動時にローラ２３０が円滑に転動しながらスプロケットに噛み合うため、チェーンの摩耗を防止できる。 The bulging amount Dt from the inner surface of the inner plate 210 of the annular bulging portion 211 for roller shaft support and the protruding amount Dk from both end surfaces of the roller 230 of the roller shaft portion 231 are formed so as to satisfy Dt <Dk, respectively. Has been.
Therefore, even when the roller 230 is displaced in the chain width direction with respect to the inner plate 210 during the chain operation, the end surface of the roller shaft portion 231 having a low sliding resistance and the inner side surface of the inner plate 210 come into contact with each other, Since the contact between the bulging surface 211a of the roller shaft support annular bulging portion 211 having a large contact resistance and both end surfaces of the roller 230 is completely prevented, the rolling resistance of the roller 230 is small, and the roller 230 is Since it meshes with the sprocket while rolling smoothly, chain wear can be prevented.

ローラ軸支用環状膨出部２１１の内プレート２１０の内側面からの膨出量Ｄｔ、ローラ軸部２３１のローラ２３０の両端面からの突出量Ｄｋ、内プレート２１０の内側面の相互間隔Ｄｉおよびローラ２３０の幅Ｄｒが、Ｄｉ−Ｄｔ＜Ｄｒ＋２Ｄｋ＜Ｄｉを満足するようにそれぞれ形成されている。
したがって、チェーン稼動時にローラ２３０が内プレート２１０に対してチェーン幅方向に片寄った際にも、ローラ軸部２３１がローラ軸支用環状膨出部２１１から外れることを阻止して潤滑油の外部漏出を防止するので、ブシュ２２０の外周面とローラ２３０の内周面の摺接摩耗や焼付きを抑制できる。 The amount of bulging Dt from the inner surface of the inner plate 210 of the annular bulging portion 211 for roller shaft support, the amount of protrusion Dk from both end surfaces of the roller 230 of the roller shaft 231, the mutual distance Di between the inner surfaces of the inner plate 210, The width Dr of the roller 230 is formed so as to satisfy Di−Dt <Dr + 2Dk <Di.
Therefore, even when the roller 230 is displaced in the chain width direction with respect to the inner plate 210 during the chain operation, the roller shaft portion 231 is prevented from coming off from the annular bulging portion 211 for supporting the roller shaft, and the lubricating oil leaks out. Therefore, sliding wear and seizure between the outer peripheral surface of the bush 220 and the inner peripheral surface of the roller 230 can be suppressed.

ローラ軸支用環状膨出部２１１の膨出面２１１ａの内径Ｗｔｉ、ローラ軸部２３１の外径Ｗｋ、ローラ２３０の内径Ｗｒおよびブシュ２２０の外径Ｗｂが、Ｗｔｉ−Ｗｋ＞Ｗｒ−Ｗｂを満足するようにそれぞれ形成されている。
したがって、ローラ２３０がブシュ２２０に対してチェーン進行方向に片寄った際に、ローラ２３０の内周面とブシュ２２０の外周面とが接触して、ローラ軸部２３１の外周面とローラ軸支用環状膨出部２１１の内周面とが互いに接触することを完全に阻止するので、ローラ軸部２３１の外周面とローラ軸支用環状膨出部２１１の内周面との摺動接触に起因する摩耗粉がローラ２３０の内周面とブシュ２２０の外周面との間に侵入して、このような摩耗粉が研摩剤となってローラ２３０の内周面とブシュ２２０の外周面との間で生じがちな異常な摩耗損傷を防止できるなど、その効果は甚大である。 The inner diameter Wti of the bulging surface 211a of the annular bulging portion 211 for roller shaft support, the outer diameter Wk of the roller shaft portion 231, the inner diameter Wr of the roller 230, and the outer diameter Wb of the bushing 220 satisfy Wti−Wk> Wr−Wb. Are formed respectively.
Therefore, when the roller 230 is offset in the chain traveling direction with respect to the bush 220, the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220 come into contact with each other, and the outer peripheral surface of the roller shaft portion 231 and the annular for supporting the roller shaft Since the contact between the inner peripheral surface of the bulging portion 211 and the inner peripheral surface of the roller shaft portion 231 is completely prevented, the sliding contact between the outer peripheral surface of the roller shaft portion 231 and the inner peripheral surface of the roller shaft supporting annular bulging portion 211 results. Wear powder penetrates between the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220, and such wear powder becomes an abrasive between the inner peripheral surface of the roller 230 and the outer peripheral surface of the bush 220. The effect is enormous, such as preventing abnormal wear damage that tends to occur.

本発明の第１実施例である搬送用長寿命チェーンの一部を切り欠いた全体概要図。BRIEF DESCRIPTION OF THE DRAWINGS The whole schematic diagram which notched a part of long-life chain for conveyance which is 1st Example of this invention. 図１に示す搬送用長寿命チェーンの連結状態を示す斜視図。The perspective view which shows the connection state of the long life chain for conveyance shown in FIG. 図１に示す搬送用長寿命チェーンを一部拡大視した断面図。FIG. 2 is a cross-sectional view of a part of the long-life chain for conveyance shown in FIG. 図１に示す搬送用長寿命チェーンに組み込まれるブシュを一部拡大視した斜視図。The perspective view which expanded partially the bush integrated in the long-life chain for conveyance shown in FIG. 図１に示す搬送用長寿命チェーンの組み付け寸法図。FIG. 2 is an assembly dimension diagram of the long-life chain for conveyance shown in FIG. 1. 図１の搬送用長寿命チェーンに組み込まれるローラがチェーン幅方向に片寄った状態を示す寸法図。The dimension drawing which shows the state which the roller integrated in the long life chain for conveyance of FIG. 1 offset in the chain width direction. 図１の搬送用長寿命チェーンに組み込まれるローラがチェーン進行方向に片寄った状態を示す寸法図。The dimension drawing which shows the state which the roller integrated in the long-life chain for conveyance of FIG. 1 offset in the chain advancing direction. 本発明の第２実施例である搬送用長寿命チェーンの連結状態を示す斜視図。The perspective view which shows the connection state of the long-life chain for conveyance which is 2nd Example of this invention. 図８に示す搬送用長寿命チェーンを一部拡大視した断面図。FIG. 9 is a cross-sectional view of a part of the long-life chain for conveyance shown in FIG.

符号の説明Explanation of symbols

１００、２００ ・・・ 搬送用長寿命チェーン
１１０、２１０ ・・・ 内プレート
１１１、２１１ ・・・ ローラ軸支用環状膨出部
１１１ａ、２１１ａ・・・ 膨出面
１１１ｂ、２１１ｂ・・・ 凹陥面
１１２、２１２ ・・・ ラビリンス構造形成粗面
１２０、２２０ ・・・ ブシュ
１３０、２３０ ・・・ ローラ
１３１、２３１ ・・・ ローラ軸部
１３２、２３２ ・・・ ラビリンス構造形成粗面
１４０、２４０ ・・・ 連結ピン
１５０、２５０ ・・・ 外プレート
２２２ ・・・ 油溜り溝
Ｌ１、Ｌ２ ・・・ 油溜り用ラビリンス構造
Ｄｔ ・・・ ローラ軸支用環状膨出部の内プレート内側面からの膨出量
Ｄｋ ・・・ ローラ軸部のローラ両端面からの突出量
Ｄｔ ・・・ ローラ軸支用環状膨出部の内プレート内側面からの膨出量
Ｄｋ ・・・ ローラ軸部のローラ両端面からの突出量
Ｄｉ ・・・ 内プレート内側面の相互間隔
Ｄｒ ・・・ ローラの幅
Ｗｔｉ ・・・ ローラ軸支用環状膨出部の膨出面の内径
Ｗｋ ・・・ ローラ軸部の外径
Ｗｒ ・・・ ローラの内径
Ｗｂ ・・・ ブシュの外径 100, 200 ... Long-life chain for conveyance 110, 210 ... Inner plate 111, 211 ... Annular bulging portion for roller shaft support 111a, 211a ... Swelling surface 111b, 211b ... Recessed surface 112 , 212 ... Labyrinth structure forming rough surface 120, 220 ... Bush 130, 230 ... Roller 131, 231 ... Roller shaft part 132, 232 ... Labyrinth structure forming rough surface 140, 240 ... connecting pins 150, 250 ... outer plate 222 ... oil reservoir groove L 1, L 2 ... oil reservoir labyrinth structure Dt ... Expansion amount from inner surface of inner plate of annular bulge for roller shaft support Dk ... Projection amount of roller shaft from both end faces of roller Dt ... Expansion amount from inner surface of inner plate of annular bulge for roller shaft support Dk ... Projection amount of roller shaft from both ends of roller Di ... Mutual distance between inner side surfaces of inner plate ... Roller width Wti ... Inner diameter of bulge surface of annular bulge for roller shaft support Wk ... Outer diameter of roller shaft Wr ... Inner diameter of roller Wb ... Outer diameter of bush

Claims (8)

左右一対で離間配置された内プレートと該内プレートのブシュ圧入孔に圧入嵌合された前後一対のブシュと該ブシュに対して回転自在に外嵌された前後一対のローラと前記ブシュ内に対して回転自在に挿通された前後一対の連結ピンと該連結ピンの両端にピン孔を圧入嵌合させて内プレートをチェーン長手方向に連結する左右一対の外プレートとを備え、前記ローラの内周面とブシュの外周面との間に潤滑油を封入してなる搬送用長寿命チェーンにおいて、
前記ローラの両端面から内プレートに向けて突出形成した小径のローラ軸部が、前記内プレートの外側面を凹陥させてオフセット状態で内側面に膨出させたローラ軸支用環状膨出部によりそれぞれ囲繞支持されていることを特徴とする搬送用長寿命チェーン。 A pair of left and right inner plates, a pair of front and rear bushes press-fitted into a bush press-fitting hole of the inner plate, a pair of front and rear rollers rotatably fitted to the bush, and the inside of the bush A pair of front and rear connecting pins inserted in a freely rotating manner, and a pair of left and right outer plates for connecting the inner plate in the longitudinal direction of the chain by press-fitting pin holes at both ends of the connecting pin, and the inner peripheral surface of the roller In a long-life chain for transportation, in which lubricating oil is sealed between the outer periphery of the bush and
A roller shaft portion having a small diameter that protrudes from both end faces of the roller toward the inner plate is recessed by the outer surface of the inner plate and is bulged to the inner surface in an offset state. Long-life chain for transportation, characterized by being supported by Go. 前記ブシュが、前記潤滑油を含浸させた焼結含油金属材料から成形されていることを特徴とする請求項１記載の搬送用長寿命チェーン。   The long-life chain for transportation according to claim 1, wherein the bush is formed from a sintered oil-impregnated metal material impregnated with the lubricating oil. 前記ローラの内周面とブシュの外周面との間に潤滑油を供給する油溜り溝が、前記ブシュの外周面に刻設されていることを特徴とする請求項１または請求項２記載の搬送用長寿命チェーン。   The oil reservoir groove for supplying lubricating oil between the inner peripheral surface of the roller and the outer peripheral surface of the bush is engraved on the outer peripheral surface of the bush. Long-life chain for conveyance. 前記ローラ軸支用環状膨出部の膨出面が、前記ローラ軸支用環状膨出部の凹陥面よりも大きな外径と小さな内径とを有していることを特徴とする請求項１乃至請求項３のいずれかに記載の搬送用長寿命チェーン。   The bulging surface of the annular bulging portion for roller shaft support has a larger outer diameter and smaller inner diameter than the recessed surface of the annular bulging portion for roller shaft support. Item 4. The long-life chain for transportation according to any one of items 3 to 4. 前記ローラ軸支用環状膨出部の膨出面とローラの両端面が、相互に近接対向するラビリンス構造形成粗面を備えていることを特徴とする請求項１乃至請求項４のいずれかに記載の搬送用長寿命チェーン。   The bulging surface of the annular bulging portion for supporting the roller shaft and both end surfaces of the roller are provided with a labyrinth structure forming rough surface that is close to each other and facing each other. Long-life chain for transporting. 前記ローラ軸支用環状膨出部の内プレート内側面からの膨出量Ｄｔおよびローラ軸部のローラ両端面からの突出量Ｄｋが、Ｄｔ＜Ｄｋを満足するようにそれぞれ形成されていることを特徴とする請求項５記載の搬送用長寿命チェーン。   The bulging amount Dt from the inner surface of the inner plate of the annular bulging portion for supporting the roller shaft and the protruding amount Dk from the both end surfaces of the roller shaft portion are formed so as to satisfy Dt <Dk. The long-life chain for transportation according to claim 5, wherein 前記ローラ軸支用環状膨出部の内プレート内側面からの膨出量Ｄｔ、ローラ軸部のローラ両端面からの突出量Ｄｋ、内プレート内側面の相互間隔Ｄｉおよびローラの幅Ｄｒが、Ｄｉ−Ｄｔ＜Ｄｒ＋２Ｄｋ＜Ｄｉを満足するようにそれぞれ形成されていることを特徴とする請求項１乃至請求項６のいずれかに記載の搬送用長寿命チェーン。   The bulging amount Dt of the roller shaft support annular bulging portion from the inner surface of the inner plate, the protruding amount Dk of the roller shaft portion from both end surfaces of the roller, the mutual distance Di of the inner surface of the inner plate and the width Dr of the roller The long-life chain for conveyance according to any one of claims 1 to 6, wherein each of the long-life chains is formed so as to satisfy -Dt <Dr + 2Dk <Di. 前記ローラ軸支用環状膨出部の膨出面の内径Ｗｔｉ、ローラ軸部の外径Ｗｋ、ローラの内径Ｗｒおよびブシュの外径Ｗｂが、Ｗｔｉ−Ｗｋ＞Ｗｒ−Ｗｂを満足するようにそれぞれ形成されていることを特徴とする請求項１乃至請求項７のいずれかに記載の搬送用長寿命チェーン。   The inner diameter Wti of the bulging surface of the annular bulging portion for supporting the roller shaft, the outer diameter Wk of the roller shaft portion, the inner diameter Wr of the roller, and the outer diameter Wb of the bush are formed so as to satisfy Wti-Wk> Wr-Wb, respectively. The long-life chain for conveyance according to any one of claims 1 to 7, wherein the long-life chain is formed.
JP2007203766A 2007-08-06 2007-08-06 Conveyance chain with long service life Pending JP2009036367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103307206A (en) * 2012-03-16 2013-09-18 株式会社椿本链条 Suspending chain
JP2014001763A (en) * 2012-06-15 2014-01-09 Hitachi Metals Techno Ltd Chain

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103307206A (en) * 2012-03-16 2013-09-18 株式会社椿本链条 Suspending chain
JP2013194784A (en) * 2012-03-16 2013-09-30 Tsubakimoto Chain Co Suspended chain
JP2014001763A (en) * 2012-06-15 2014-01-09 Hitachi Metals Techno Ltd Chain

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