JP4274404B2 - Chain conveyor - Google Patents

Chain conveyor Download PDF

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Publication number
JP4274404B2
JP4274404B2 JP2002125387A JP2002125387A JP4274404B2 JP 4274404 B2 JP4274404 B2 JP 4274404B2 JP 2002125387 A JP2002125387 A JP 2002125387A JP 2002125387 A JP2002125387 A JP 2002125387A JP 4274404 B2 JP4274404 B2 JP 4274404B2
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Japan
Prior art keywords
shaft support
chain unit
shaft
hole
diameter
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JP2002125387A
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JP2003312824A (en
JP2003312824A5 (en
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陽右 塩谷
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Startechno Co Ltd
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Startechno Co Ltd
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Description

【0001】
【発明が属する技術分野】
本発明は、多数のチェーン単位部材相互を連結したキャタピラー形式のチェーンコンベヤー、詳しくはチェーンコンベヤーを湾曲走行可能にするチェーン単位部材の連結構造に関する。
【0002】
【発明が解決しようとする課題】
従来のコンベヤーとしては、多数のチェーン単位部材相互を走行方向に対して屈曲可能に連結したキャタピラー形式のチェーンコンベヤーや所望の搬送間隔をおいて設けられた一対のプーリ間にベルトを張設したベルトコンベヤー或いは搬送方向と直交する方向に軸線を有した多数のローラを同期駆動するように支持したローラコンベヤー等が知られている。
【0003】
これらのコンベヤーによりワークを所望の曲率で湾曲搬送するには、例えばベルトコンベヤー61においては、図6に示すように所望の搬送間隔をおき、一方が電動モータ63に連結された一対のプーリを、互いの軸線が所望の湾曲搬送路になる角度をおいて配置し、これらプーリ間に湾曲に応じて平面が扇状に形成されたベルト65を張設してワークを所望の角度で湾曲搬送したり、ローラコンベヤー71においては、図7に示すように夫々のローラ73を円錐状に形成し、これらローラの小径側を湾曲の中心側に位置させると共に相互をチェーン(図示せず)等で連結して同一方向へ回転可能に支持して全体の湾曲角度が所望の角度となるように構成して湾曲搬送可能に構成している。
【0004】
また、上記したキャタピラー形式のチェーンコンベヤーにあっては、各チェーン単位部材に設けられた軸支部及び軸受部に固定ピンを挿嵌して連結する構造であるため、走行直交方向に対して各チェーン単位部材相互を揺動させて湾曲走行させることができなかった。
【0005】
しかし、上記した構造のコンベヤーにあっては、ベルトの平面扇形状により、また各ローラの円錐度により曲率が決定されるため、所望の曲率でワークを湾曲搬送するには、曲率に応じてベルトやローラを形成する必要があり、製作コストが増大する問題を有している。
【0006】
この結果、搬送レイアウトに変更が生じた場合には、変更された曲率に応じてベルトやローラを新たに製作する必要があり、搬送レイアウト変更の自由度が悪かった。
【0007】
本発明は、上記した従来の欠点を解決するために発明されたもので、その課題とする処は、曲率に制約されることなく、所定の曲率内で湾曲搬送の曲率を適宜変更することができ、製作コストを低減することができるチェーンコンベヤーを提供することにある。
【0008】
本発明の他の課題は、搬送レイアウト変更に対して簡易、かつ低コストに対応して自由度の高いチェーンコンベヤーを提供することにある。
【0009】
請求項1の発明は、多数のチェーン単位部材相互を無端状に連結し、駆動連結された電動モータの駆動に伴って走行することにより載置されたワークを搬送するキャタピラー形式のチェーンコンベヤーにおいて、各チェーン単位部材は走行方向の一方側にて走行直交方向に所定の間隔をおいて相対し、固定ピンが挿通される軸支孔を有し、かつ一方の軸支孔の周囲には、該軸支孔と同軸状で、大径の大径凹部が形成された一対の軸支部と、走行方向の他方側にて隣接するチェーン単位部材の軸支部間に位置するように設けられ、走行直交方向に軸線を有し、該軸線方向の中間部にて内径が最小径になると共に該軸線方向の中間部から各側方に向かって内径が徐々に増大する軸受孔を設けた軸受部を有し、隣接する一方のチェーン単位部材における軸支部間に、他方のチェーン単位部材における軸受部を位置した状態で軸支部の軸支孔内及び軸受部の軸受孔内に挿入してチェーン単位部材相互を連結する固定ピンは、チェーン単位部材相互を連結した際にそれぞれの軸支部から外側へ突出する軸線長さ及び軸支孔に挿嵌する外径で、かつ一方軸端部に上記大径凹部とほぼ一致する大きさの大径部及び軸支孔を通過して軸支部内面に係合して抜け止めする係合突部を有し、連結されたチェーン単位部材の走行直交方向端に近接するように湾曲形成され、それぞれの相対面に形成された走行ガイド部に、各軸支部から突出した固定ピンの軸端部を摺動可能に支持して走行案内する一対の走行案内フレームを備え、チェーン単位部材相互を、軸受孔の内径差に応じた角度で揺動可能に連結して湾曲走行可能にしたことを特徴とする。
【0010】
請求項2の発明は、多数のチェーン単位部材相互を無端状に連結し、駆動連結された電動モータの駆動に伴って走行することにより載置されたワークを搬送するキャタピラー形式のチェーンコンベヤーにおいて、各チェーン単位部材は走行方向の一方側にて走行直交方向に所定の間隔をおいて相対し、固定ピンが挿通される軸支孔を有し、かつ一方の軸支孔の周囲には、該軸支孔と同軸状で、大径の大径凹部が形成されると共に外面に被ガイド部が設けられた一対の軸支部と、走行方向の他方側にて隣接するチェーン単位部材の軸支部間に位置するように設けられ、走行直交方向に軸線を有し、該軸線方向の中間部にて内径が最小径になると共に該軸線方向の中間部から各側方に向かって内径が徐々に増大する軸受孔を設けた軸受部を有し、隣接する一方のチェーン単位部材における軸支部間に、他方のチェーン単位部材における軸受部を位置した状態で軸支部の軸支孔内及び軸受部の軸受孔内に挿入してチェーン単位部材相互を連結する固定ピンは、チェーン単位部材相互を連結した際にそれぞれの軸支部から外側へ突出する軸線長さ及び軸支孔に挿嵌する外径で、かつ一方軸端部に上記大径凹部とほぼ一致する大きさの大径部及び軸支孔を通過して軸支部内面に係合して抜け止めする係合突部を有し、連結されたチェーン単位部材の走行直交方向端に近接するように湾曲形成され、それぞれの相対面に形成された走行ガイド部に被ガイド部を摺動可能に支持して走行案内する一対の走行案内フレームを備え、チェーン単位部材相互を、軸受孔の内径差に応じた角度で揺動可能に連結して湾曲走行可能にしたことを特徴とする。
【0011】
【発明の実施形態】
以下に実施形態を示す図に従って本発明を説明する。
図1〜図3において、チェーンコンベヤー1は後述する多数のチェーン単位部材17相互を連結して走行直交方向に対して揺動可能で、走行方向に対して屈曲可能な無端状のキャタピラー構造からなるコンベヤーチェーン5を走行案内フレーム3に設けてなる。該走行案内フレーム3は直線状或いは所望の曲率で湾曲形成される。該走行案内フレーム3を所望の曲率で湾曲形成するには、ロールベンダー装置等の加工装置を使用することにより簡易に行うことができる。
【0012】
該走行案内フレーム3としては、例えばアルミニウム材(アルミニウム合金を含む)、ステンレス材、鉄材等のように塑性変形可能な材質の型材からなり、その上部及び下部にはコンベヤーチェーン5の各チェーン単位部材17を走行案内するための走行ガイド部3aが長手方向へ連続するようにそれぞれ形成されている。なお、走行案内フレーム3としては、上記した金属材の他に耐摩耗性や高い曲げ強度を有した後述するチェーン単位部材17と同種の合成樹脂材としてもよく、合成樹脂材とした場合にあっては、加熱した状態で所望の曲率に湾曲形成すればよい。
【0013】
走行案内フレーム3の一方端部には電動モータ7に連結された駆動軸(図示せず)が、また他方端部には従動軸(図示せず)が回転可能に軸支され、駆動軸及び従動軸に固定されたスプロケット(図示せず)を噛合わせてチェーンコンベヤー1を構成する。
【0014】
該コンベヤーチェーン5は多数のチェーン単位部材17相互を走行直交方向に対して揺動可能で、走行方向に対して屈曲可能で無端状に連結した構造で、各チェーン単位部材17はPOM(ポリアセタール)、PET(ポリエチレンテレフタレート)、PP(ポリプロピレン)、PBT(ポリブチレンテレフタレート)やポリアミド等のように耐摩耗性、高引張強度を有した合成樹脂またはこれらの合成樹脂にカーボン繊維等の強化繊維を含有した複合強化樹脂により形成される。
【0015】
各チェーン単位部材17は平面板19における搬送方向の一方側下部に所定の間隔をおいて垂下する一対の軸支部21と、搬送方向の他方側下部に隣接するチェーン単位部材17の軸支部21間に位置する軸受部23を一体形成してなる。そして平面板19の上面には搬送するワーク(図示せず)が滑動するのを防止する滑止部材24が設けられる。該滑止部材24は平面板19の上面に対してエラストマー樹脂等により一体成形して形成される。
【0016】
各軸支部21には後述する固定ピン25の外径とほぼ一致する内径の軸支孔21aがそれぞれ形成され、その内、一方の軸支部21の外面には軸支孔21aと同軸状の大径凹部21bが形成している。
【0017】
上記軸受部23には搬送直交方向に軸線を有した軸受孔23aが形成される。該軸受孔23aは軸線方向中間部が最小内径で、中間部から両側方に向かって内径が徐々に増大する環状テーパ面23bに形成される。各環状テーパ面23bのテーパ度はコンベヤーチェーン5を湾曲走行させる際の曲率に基づいて決定され、例えば小曲率で走行させるにはテーパ度を小さく、反対に大曲率で走行させるにはテーパ度を大きくすることにより達成できるが、テーパ度を大きくした場合には、走行時にぶれ易くなるため、要求される湾曲路の曲率とぶれの程度に応じて適宜設定すればよい。
【0018】
そしてチェーン単位部材17の軸支部21間に隣接するチェーン単位部材17の軸受部23を配置した状態で大径凹部21bが形成された一方の軸支部21側から固定ピン25を他方の軸支部21に向って挿通してチェーン単位部材17相互を軸支させる。該固定ピン25はチェーン単位部材17と同種の合成樹脂により軸支部21の相互間隔幅より長い軸線長さで、軸支孔21aに挿嵌可能な外径に形成される。
【0019】
大径凹部21bが形成された固定ピン25の一方軸端部には大径凹部21b内に嵌合可能な膨出部25a及び該膨出部25aから軸線方向中間部に向って軸支孔21aの軸線方向幅をおいた箇所に係合突条25bが一体形成される。該固定ピン25は隣接するチェーン単位部材17相互を連結した際にその軸両端部が所定の軸線長さで外側へ突出し、走行ガイド部3aに摺接して走行案内するための被ガイド部25cを構成する。
【0020】
次に、チェーン単位部材相互の連結作用を説明する。
搬送方向下手側に位置するチェーン単位部材17の軸支部21間に後続するチェーン単位部材17の軸受部23を位置させた状態で、ほぼ連通する軸支孔21a及び軸受孔23a内に対し、大径凹部21bが形成された軸支部21側から固定ピン25を挿入して、先端部側を他方の軸支部21の軸支孔21a内に支持させる。
【0021】
このとき、係合突条25bが一方の軸支部21における大径凹部21bの底面に当接して挿入が規制されるが、この状態にて固定ピン25を更に加圧すると、該係合突条25bは軸支孔21aの周りの軸支部21を弾性変形させながら乗り越えてその内面と係合する。このとき、図3に示すように、固定ピン25の膨出部25aは大径凹部21b内に嵌合し、係合突条25bとの協働により固定ピン25が軸支部21及び軸受部23から抜け出すのを規制する。また、固定ピン25の各軸端部はそれぞれの軸支部21の外面から突出して被ガイド部25cを構成する。
【0022】
上記のように相互が連結されたコンベヤーチェーン5のチェーン単位部材17は両端部がそれぞれの軸支部21に支持された固定ピン25の中間部が軸受部23における軸受孔23aの環状テーパ面23bにて支持されるため、図4に示すように各チェーン単位部材17相互を走行直交方向に対して揺動可能にさせる。
【0023】
上記方法により各チェーン単位部材17相互を連結した後、各固定ピン25における被ガイド部25cを走行ガイド部3aに係合して摺動可能に支持させた状態で電動モータ7に連結されたスプロケット及び従動軸に連結されたスプロケットの歯を軸支部21及び軸受部23の間に形成される空隙部(図示せず)内に係合させた状態で各端部に位置するチェーン単位部材17相互を上記のように連結して無端状にコンベヤーチェーン5を張設してチェーンコンベヤー1を組み立てる。
【0024】
なお、コンベヤーチェーン5を直線状に走行させる場合には、直線状に形成された走行案内フレーム3を使用すればよく、湾曲形成された走行案内フレーム3を使用したチェーンコンベヤー1との組み合わせにより搬送路を任意に設定することができる。
【0025】
チェーンコンベヤー1の搬送路を所望曲率の湾曲路とした場合には、図4に示すように環状テーパ面23bの傾斜角度の範囲内で各チェーン単位部材17相互を走行直交方向に対して揺動させることによりコンベヤーチェーン5を湾曲走行可能にさせる。
【0026】
本実施形態は、コンベヤーチェーン5の各チェーン単位部材17相互を、環状テーパ面23bの傾斜角度に応じた範囲内で走行直交方向に対して揺動可能に連結するため、を所望の曲率で湾曲走行させることができる。その際、環状テーパ面23bの傾斜角度に応じた範囲内で湾曲走行の曲率を任意に設定することができ、搬送レイアウトの自由度を高くすることができる。
【0027】
また、コンベヤーチェーン5を湾曲走行用に専用化する必要がなく、単一種類のチェーン単位部材17を使用して直線状或いは任意の曲率で湾曲走行させることができ、チェーンコンベヤー1自体を低コスト化することができる。
【0028】
上記説明は、チェーン単位部材17相互を連結した際に軸支部21の外面から突出する固定ピン25の各軸端部を被ガイド部25cとして走行案内フレーム3の走行ガイド部3aに摺動可能に支持させるものとしたが、図5に示すように各軸支部21の外面に被ガイド部41を突出して設け、該被ガイド部41を走行案内フレーム3の走行ガイド部3aに摺動可能に支持させる構成としてもよい。
【0029】
上記説明の大径凹部21bを円盤形状に、また膨出部25aを大径凹部21bに嵌合可能な形状に形成したが、大径凹部21bを一部切欠円盤形状又は多角形状とすると共に膨出部25aを大径凹部21bに嵌合可能な形状として固定ピン25を回り止めしてもよい。
【0030】
【発明の効果】
本発明は、曲率に制約されることなく、所定の曲率内で湾曲搬送の曲率を適宜変更することができ、製作コストを低減することができる。また、搬送レイアウト変更に対して簡易、かつ低コストに対応して搬送レイアウト変更に対して自由度を高くすることができる。
【図面の簡単な説明】
【図1】チェーンコンベヤーの全体斜視図である。
【図2】チェーン単位部材を示す斜視図である。
【図3】チェーン単位部材の連結状態を示す縦断面図である。
【図4】チェーン単位部材相互の揺動状態を示す縦断面図である。
【図5】変更実施形態を示す説明図である。
【図6】従来例を示す説明図である。
【図7】従来例を示す説明図である。
【符号の説明】
1−チェーンコンベヤー、3−走行案内フレーム、3a−走行ガイド部、5−コンベヤーチェーン、17−チェーン単位部材、21−軸支部、23−軸受部、23a−軸受孔、23b−環状テーパ面、25−固定ピン
[0001]
[Technical field to which the invention belongs]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caterpillar type chain conveyor in which a large number of chain unit members are connected to each other, and more particularly to a chain unit member connection structure that enables the chain conveyor to travel in a curved manner.
[0002]
[Problems to be solved by the invention]
As a conventional conveyor, a caterpillar type chain conveyor in which a large number of chain unit members are connected to each other so as to be able to bend in a traveling direction, or a belt in which a belt is stretched between a pair of pulleys provided at a desired conveyance interval. 2. Description of the Related Art A conveyor or a roller conveyor that supports a plurality of rollers having axes in a direction orthogonal to a conveying direction so as to be driven synchronously is known.
[0003]
In order to bend and convey the workpiece with a desired curvature by these conveyors, for example, in the belt conveyor 61, a desired conveyance interval is provided as shown in FIG. 6, and a pair of pulleys, one of which is connected to the electric motor 63, Arrange each other at an angle at which the axes become the desired curved conveyance path, and stretch the belt 65 having a flat fan-shaped surface according to the curve between these pulleys to convey the workpiece at a desired angle. In the roller conveyor 71, as shown in FIG. 7, each roller 73 is formed in a conical shape, the small diameter side of these rollers is positioned on the center side of the curve, and they are connected to each other by a chain (not shown) or the like. Thus, the entire bending angle is supported so as to be rotatable in the same direction so as to be a desired angle.
[0004]
Moreover, in the above-described caterpillar type chain conveyor, each chain unit has a structure in which a fixing pin is inserted and connected to a shaft support portion and a bearing portion provided in each chain unit member. The unit members could not be bent while swinging each other.
[0005]
However, in the conveyor having the structure described above, the curvature is determined by the flat fan shape of the belt and the conicity of each roller. It is necessary to form a roller and a roller, which has a problem that the manufacturing cost increases.
[0006]
As a result, when the conveyance layout is changed, it is necessary to newly manufacture a belt or a roller according to the changed curvature, and the flexibility of changing the conveyance layout is poor.
[0007]
The present invention was invented in order to solve the above-described conventional drawbacks, and the subject of the present invention is to appropriately change the curvature of the curved conveyance within a predetermined curvature without being restricted by the curvature. It is possible to provide a chain conveyor that can reduce the manufacturing cost.
[0008]
Another object of the present invention is to provide a chain conveyor that is simple and low in cost with respect to a change in the transport layout and has a high degree of freedom.
[0009]
The invention of claim 1 is a caterpillar type chain conveyor that transports a workpiece placed by driving a chain drive member connected endlessly with a plurality of chain unit members and driven by an electric motor that is drive-coupled. each chain unit member, relative at predetermined intervals in the traveling direction perpendicular at one side in the running direction, having a shaft supporting hole of the fixing pin is inserted, and on the periphery of one of the shaft supporting hole, It is provided so as to be located between a pair of shaft support portions that are coaxial with the shaft support hole and have a large-diameter large-diameter recess, and a shaft support portion of a chain unit member that is adjacent on the other side in the traveling direction. having an axis in the perpendicular direction, the bearing portion inside diameter toward each side from the middle portion of the axial direction is provided gradually increasing bearing hole with an inner diameter at an intermediate portion of the shaft line direction is minimum diameter has, on one of the adjacent chain unit member In the state where the bearing portion of the other chain unit member is positioned between the shaft support portions, the fixing pin that is inserted into the shaft support hole of the shaft support portion and into the bearing hole of the bearing portion and connects the chain unit members to each other is a chain unit. When connecting the members to each other, the shaft length that protrudes outward from each shaft support portion and the outer diameter that fits into the shaft support hole, and a large diameter that almost matches the large diameter recess at one shaft end portion. Each of which has an engagement projection that passes through the shaft and the shaft support hole and engages with the inner surface of the shaft support to prevent it from coming off. The travel guide portion formed on the relative surface is provided with a pair of travel guide frames that slidably support the shaft end portions of the fixed pins protruding from the respective shaft support portions, and the chain unit members are mutually connected to the bearing holes. Can be pivoted at an angle according to the inner diameter difference of Characterized in that the bendable travel Te.
[0010]
The invention of claim 2 is a caterpillar type chain conveyor that transports a workpiece placed by driving a chain motor unit member endlessly connected to each other and driven by driving of an electric motor that is drive-coupled. each chain unit member, relative at predetermined intervals in the traveling direction perpendicular at one side in the running direction, having a shaft supporting hole of the fixing pin is inserted, and on the periphery of one of the shaft supporting hole, A pair of shaft support portions that are coaxial with the shaft support hole and have a large-diameter large-diameter recess and an outer surface provided with a guided portion, and a shaft support portion of a chain unit member that is adjacent on the other side in the traveling direction provided so as to be positioned between, having an axis in the traveling direction perpendicular, inside diameter inside diameter at an intermediate portion of the shaft line direction toward each side from the middle portion of the axial direction together becomes minimum diameter gradually Has a bearing part with increased bearing holes Between axial support in one of the adjacent chain unit member, connecting the chain unit members each other by inserting the shaft supporting the shaft supporting hole and the bearing hole of the bearing portion while positioning the bearing portion of the other chain unit member The fixing pin has an axial length that protrudes outward from the respective shaft support portions when the chain unit members are connected to each other and an outer diameter that fits into the shaft support hole. It has an engagement protrusion that engages with the inner surface of the shaft support through the large diameter portion and the shaft support hole having the same size and prevents the shaft support member from coming off. And a pair of travel guide frames that slidably support the guided portions on the travel guide portions formed on the respective relative surfaces to guide the travel of the chain unit members. Can swing at an angle depending on Characterized in that the bendable travel linked to.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings showing embodiments.
1 to 3, the chain conveyor 1 is composed of an endless caterpillar structure that can be swung with respect to the traveling direction by connecting a plurality of chain unit members 17 to be described later, and bendable with respect to the traveling direction. A conveyor chain 5 is provided on the travel guide frame 3. The travel guide frame 3 is linearly formed or curved with a desired curvature. In order to form the travel guide frame 3 with a desired curvature, it can be easily performed by using a processing device such as a roll bender device.
[0012]
The travel guide frame 3 is made of, for example, a mold that can be plastically deformed such as aluminum (including aluminum alloy), stainless steel, iron, and the like. Traveling guide portions 3a for traveling and guiding 17 are formed so as to be continuous in the longitudinal direction. The travel guide frame 3 may be a synthetic resin material of the same type as the chain unit member 17 described later having wear resistance and high bending strength in addition to the metal material described above. For example, a curve having a desired curvature may be formed in a heated state.
[0013]
A driving shaft (not shown) connected to the electric motor 7 is rotatably supported at one end of the travel guide frame 3 and a driven shaft (not shown) is rotatably supported at the other end. A chain conveyor 1 is configured by meshing sprockets (not shown) fixed to the driven shaft.
[0014]
The conveyor chain 5 has a structure in which a large number of chain unit members 17 can swing with respect to the traveling orthogonal direction and bendable with respect to the traveling direction so as to be connected endlessly. Each chain unit member 17 is a POM (polyacetal). , Synthetic resins with wear resistance and high tensile strength, such as PET (polyethylene terephthalate), PP (polypropylene), PBT (polybutylene terephthalate), and polyamide, or these fibers contain reinforcing fibers such as carbon fibers The composite reinforced resin is formed.
[0015]
Each chain unit member 17 is formed between a pair of shaft support portions 21 that hang down at a predetermined interval on a lower portion on one side in the transport direction of the flat plate 19 and a shaft support portion 21 of the chain unit member 17 adjacent to the lower portion on the other side in the transport direction. The bearing part 23 located in is formed integrally. An anti-slip member 24 is provided on the upper surface of the flat plate 19 to prevent the work to be conveyed (not shown) from sliding. The anti-slip member 24 is formed by integrally molding the upper surface of the flat plate 19 with an elastomer resin or the like.
[0016]
Each shaft support portion 21 is formed with a shaft support hole 21a having an inner diameter substantially equal to the outer diameter of the fixing pin 25 described later, and one of the shaft support portions 21 has a large coaxial surface with the shaft support hole 21a. A radial recess 21b is formed.
[0017]
The bearing portion 23 is formed with a bearing hole 23a having an axis in the conveyance orthogonal direction. The bearing hole 23a is formed in an annular taper surface 23b having a minimum inner diameter in the axial direction and a gradually increasing inner diameter from the intermediate portion toward both sides. The taper degree of each annular taper surface 23b is determined on the basis of the curvature when the conveyor chain 5 is curved, and for example, the taper degree is small for running with a small curvature, and conversely the taper degree for running with a large curvature. This can be achieved by increasing it, but if the degree of taper is increased, it is likely to be shaken during travel, so it may be set as appropriate according to the required curvature of the curved road and the degree of shake.
[0018]
Then, the fixing pin 25 is connected to the other shaft support portion 21 from the one shaft support portion 21 side where the large-diameter concave portion 21b is formed with the bearing portion 23 of the chain unit member 17 adjacent between the shaft support portions 21 of the chain unit member 17 disposed. The chain unit members 17 are pivotally supported by being inserted in the direction toward the center. The fixing pin 25 is formed of the same kind of synthetic resin as the chain unit member 17 and has an axial length longer than the mutual interval width of the shaft support portions 21 and an outer diameter that can be inserted into the shaft support hole 21a.
[0019]
A bulging portion 25a that can be fitted into the large-diameter recess 21b at one shaft end of the fixing pin 25 in which the large-diameter recess 21b is formed, and a shaft support hole 21a from the bulging portion 25a toward the middle in the axial direction. The engaging protrusion 25b is integrally formed at a location where the axial width is set. When the adjacent pin unit members 17 are connected to each other, the fixed pin 25 protrudes outward at both axial ends with a predetermined axial length, and a guided portion 25c for sliding and contacting the traveling guide portion 3a is guided. Constitute.
[0020]
Next, the coupling action between the chain unit members will be described.
In a state where the bearing portion 23 of the chain unit member 17 that follows is positioned between the shaft support portions 21 of the chain unit member 17 that is located on the lower side in the transport direction, the shaft support hole 21a and the bearing hole 23a that are substantially in communication with each other The fixing pin 25 is inserted from the shaft support portion 21 side where the diameter recess 21 b is formed, and the tip end side is supported in the shaft support hole 21 a of the other shaft support portion 21.
[0021]
At this time, the engaging ridge 25b abuts against the bottom surface of the large-diameter recess 21b in one of the shaft support portions 21, and insertion is restricted. When the fixing pin 25 is further pressurized in this state, the engaging ridge 25b 25b gets over the shaft support portion 21 around the shaft support hole 21a while elastically deforming and engages with the inner surface thereof. At this time, as shown in FIG. 3, the bulging portion 25a of the fixing pin 25 is fitted into the large-diameter recess 21b, and the fixing pin 25 is connected to the shaft support portion 21 and the bearing portion 23 by cooperation with the engaging protrusion 25b. Regulate getting out of. Each shaft end portion of the fixing pin 25 protrudes from the outer surface of each shaft support portion 21 to constitute a guided portion 25c.
[0022]
The chain unit member 17 of the conveyor chain 5 connected to each other as described above has an intermediate portion of the fixed pin 25 whose both ends are supported by the respective shaft support portions 21 formed on the annular tapered surface 23b of the bearing hole 23a in the bearing portion 23. Therefore, as shown in FIG. 4, the chain unit members 17 can swing with respect to the traveling orthogonal direction.
[0023]
After the chain unit members 17 are connected to each other by the above method, the sprocket connected to the electric motor 7 with the guided portions 25c of the fixed pins 25 engaged with the travel guide portions 3a and slidably supported. And the chain unit members 17 positioned at the respective ends in a state where the teeth of the sprocket connected to the driven shaft are engaged in a gap (not shown) formed between the shaft support portion 21 and the bearing portion 23. Are connected as described above, and the conveyor chain 5 is stretched endlessly to assemble the chain conveyor 1.
[0024]
When the conveyor chain 5 travels in a straight line, the travel guide frame 3 formed in a straight line may be used, and the conveyor chain 5 is conveyed in combination with the chain conveyor 1 using the travel guide frame 3 formed in a curve. The road can be set arbitrarily.
[0025]
When the conveying path of the chain conveyor 1 is a curved path having a desired curvature, the chain unit members 17 are swung with respect to the traveling orthogonal direction within the range of the inclination angle of the annular tapered surface 23b as shown in FIG. By doing so, the conveyor chain 5 can be curved.
[0026]
In this embodiment, the chain unit members 17 of the conveyor chain 5 are coupled with each other so as to be swingable with respect to the traveling orthogonal direction within a range corresponding to the inclination angle of the annular taper surface 23b. It can be run. At that time, the curvature of the curved traveling can be arbitrarily set within a range corresponding to the inclination angle of the annular tapered surface 23b, and the degree of freedom of the transport layout can be increased.
[0027]
In addition, it is not necessary to dedicate the conveyor chain 5 for curved travel, and the single-type chain unit member 17 can be used to travel in a straight line or with an arbitrary curvature so that the chain conveyor 1 itself can be manufactured at low cost. Can be
[0028]
In the above description, when the chain unit members 17 are connected to each other, each shaft end portion of the fixing pin 25 protruding from the outer surface of the shaft support portion 21 is slidable on the travel guide portion 3a of the travel guide frame 3 with the guided portion 25c. As shown in FIG. 5, as shown in FIG. 5, a guided portion 41 is provided to project from the outer surface of each shaft support portion 21, and the guided portion 41 is slidably supported on the traveling guide portion 3 a of the traveling guide frame 3. A configuration may be adopted.
[0029]
The large-diameter recess 21b described above is formed into a disk shape and the bulging portion 25a is formed into a shape that can be fitted into the large-diameter recess 21b. The fixing pin 25 may be prevented from rotating by making the protruding portion 25a fit into the large-diameter recess 21b.
[0030]
【The invention's effect】
In the present invention, the curvature of the curved conveyance can be appropriately changed within a predetermined curvature without being restricted by the curvature, and the manufacturing cost can be reduced. In addition, it is easy to change the transfer layout, and it is possible to increase the degree of freedom for changing the transfer layout in response to low cost.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a chain conveyor.
FIG. 2 is a perspective view showing a chain unit member.
FIG. 3 is a longitudinal sectional view showing a connected state of chain unit members.
FIG. 4 is a longitudinal sectional view showing a swinging state of chain unit members.
FIG. 5 is an explanatory diagram showing a modified embodiment.
FIG. 6 is an explanatory diagram showing a conventional example.
FIG. 7 is an explanatory diagram showing a conventional example.
[Explanation of symbols]
1-chain conveyor, 3-travel guide frame, 3a-travel guide section, 5-conveyor chain, 17-chain unit member, 21-shaft support section, 23-bearing section, 23a-bearing hole, 23b-annular tapered surface, 25 −Fixing pin

Claims (2)

多数のチェーン単位部材相互を無端状に連結し、駆動連結された電動モータの駆動に伴って走行することにより載置されたワークを搬送するキャタピラー形式のチェーンコンベヤーにおいて、
各チェーン単位部材は
走行方向の一方側にて走行直交方向に所定の間隔をおいて相対し、固定ピンが挿通される軸支孔を有し、かつ一方の軸支孔の周囲には、該軸支孔と同軸状で、大径の大径凹部が形成された一対の軸支部と、
走行方向の他方側にて隣接するチェーン単位部材の軸支部間に位置するように設けられ、走行直交方向に軸線を有し、該軸線方向の中間部にて内径が最小径になると共に該軸線方向の中間部から各側方に向かって内径が徐々に増大する軸受孔を設けた軸受部を有し、
隣接する一方のチェーン単位部材における軸支部間に、他方のチェーン単位部材における軸受部を位置した状態で軸支部の軸支孔内及び軸受部の軸受孔内に挿入してチェーン単位部材相互を連結する固定ピンは、チェーン単位部材相互を連結した際にそれぞれの軸支部から外側へ突出する軸線長さ及び軸支孔に挿嵌する外径で、かつ一方軸端部に上記大径凹部とほぼ一致する大きさの大径部及び軸支孔を通過して軸支部内面に係合して抜け止めする係合突部を有し、
連結されたチェーン単位部材の走行直交方向端に近接するように湾曲形成され、それぞれの相対面に形成された走行ガイド部に、各軸支部から突出した固定ピンの軸端部を摺動可能に支持して走行案内する一対の走行案内フレームを備え、
チェーン単位部材相互を、軸受孔の内径差に応じた角度で揺動可能に連結して湾曲走行可能にしたチェーンコンベヤー。
In a caterpillar type chain conveyor that transports a workpiece placed by connecting a large number of chain unit members endlessly and traveling with the drive of a drive-connected electric motor,
Each chain unit members,
In the running direction orthogonal at one side in the traveling direction at a predetermined interval relative has a shaft supporting hole of the fixing pin is inserted, and on the periphery of one of the shaft supporting hole, the shaft supporting hole coaxial A pair of shaft support portions formed with a large-diameter large-diameter recess ,
Provided so as to be positioned between the shaft support adjacent chain unit member by the running direction of the other side, the traveling direction perpendicular to have an axis, said axis with the inner diameter becomes minimum diameter at an intermediate portion of the shaft line direction A bearing portion having a bearing hole in which the inner diameter gradually increases from the middle portion of the direction toward each side;
The chain unit members are connected to each other by inserting into the shaft support hole of the shaft support portion and the bearing hole of the bearing portion with the bearing portion of the other chain unit member positioned between the shaft support portions of one adjacent chain unit member. The fixing pin has an axial length that protrudes outward from the respective shaft support portions when the chain unit members are connected to each other and an outer diameter that fits into the shaft support hole. Having an engagement protrusion that engages with the inner surface of the shaft support portion through the large diameter portion and the shaft support hole having the same size, and prevents it from coming off;
Curved so as to be close to the end of the connected chain unit member in the direction perpendicular to the running direction, the running guide part formed on each relative surface can slide the shaft end part of the fixed pin protruding from each shaft support part. A pair of travel guide frames for supporting and guiding the travel,
A chain conveyor that allows chain unit members to be swung at an angle corresponding to the difference in inner diameter of the bearing holes so that they can run in a curved line.
多数のチェーン単位部材相互を無端状に連結し、駆動連結された電動モータの駆動に伴って走行することにより載置されたワークを搬送するキャタピラー形式のチェーンコンベヤーにおいて、
各チェーン単位部材は
走行方向の一方側にて走行直交方向に所定の間隔をおいて相対し、固定ピンが挿通される軸支孔を有し、かつ一方の軸支孔の周囲には、該軸支孔と同軸状で、大径の大径凹部が形成されると共に外面に被ガイド部が設けられた一対の軸支部と、
走行方向の他方側にて隣接するチェーン単位部材の軸支部間に位置するように設けられ、走行直交方向に軸線を有し、該軸線方向の中間部にて内径が最小径になると共に該軸線方向の中間部から各側方に向かって内径が徐々に増大する軸受孔を設けた軸受部を有し、
隣接する一方のチェーン単位部材における軸支部間に、他方のチェーン単位部材における軸受部を位置した状態で軸支部の軸支孔内及び軸受部の軸受孔内に挿入してチェーン単位部材相互を連結する固定ピンは、チェーン単位部材相互を連結した際にそれぞれの軸支部から外側へ突出する軸線長さ及び軸支孔に挿嵌する外径で、かつ一方軸端部に上記大径凹部とほぼ一致する大きさの大径部及び軸支孔を通過して軸支部内面に係合して抜け止めする係合突部を有し、
連結されたチェーン単位部材の走行直交方向端に近接するように湾曲形成され、それぞれの相対面に形成された走行ガイド部に被ガイド部を摺動可能に支持して走行案内する一対の走行案内フレームを備え、
チェーン単位部材相互を、軸受孔の内径差に応じた角度で揺動可能に連結して湾曲走行可能にしたチェーンコンベヤー。
In a caterpillar type chain conveyor that transports a workpiece placed by connecting a large number of chain unit members endlessly and traveling with the drive of a drive-connected electric motor,
Each chain unit members,
In the running direction orthogonal at one side in the traveling direction at a predetermined interval relative has a shaft supporting hole of the fixing pin is inserted, and on the periphery of one of the shaft supporting hole, the shaft supporting hole coaxial A pair of shaft support portions in which a large-diameter large-diameter concave portion is formed and a guided portion is provided on the outer surface ;
Provided so as to be positioned between the shaft support adjacent chain unit member by the running direction of the other side, the traveling direction perpendicular to have an axis, said axis with the inner diameter becomes minimum diameter at an intermediate portion of the shaft line direction A bearing portion having a bearing hole in which the inner diameter gradually increases from the middle portion of the direction toward each side;
The chain unit members are connected to each other by inserting into the shaft support hole of the shaft support portion and the bearing hole of the bearing portion with the bearing portion of the other chain unit member positioned between the shaft support portions of one adjacent chain unit member. The fixing pin has an axial length that protrudes outward from the respective shaft support portions when the chain unit members are connected to each other and an outer diameter that fits into the shaft support hole. Having an engagement protrusion that engages with the inner surface of the shaft support portion through the large diameter portion and the shaft support hole having the same size, and prevents it from coming off;
A pair of travel guides that are curved so as to be close to the travel orthogonal direction ends of the connected chain unit members, and that are guided by supporting the guided portions slidably on the travel guide portions formed on the respective relative surfaces. With a frame,
A chain conveyor that allows chain unit members to be swung at an angle corresponding to the difference in inner diameter of the bearing holes so that they can run in a curved line.
JP2002125387A 2002-04-26 2002-04-26 Chain conveyor Expired - Fee Related JP4274404B2 (en)

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