JPH0711026Y2 - Tension device for belts, etc. - Google Patents
Tension device for belts, etc.Info
- Publication number
- JPH0711026Y2 JPH0711026Y2 JP1987036180U JP3618087U JPH0711026Y2 JP H0711026 Y2 JPH0711026 Y2 JP H0711026Y2 JP 1987036180 U JP1987036180 U JP 1987036180U JP 3618087 U JP3618087 U JP 3618087U JP H0711026 Y2 JPH0711026 Y2 JP H0711026Y2
- Authority
- JP
- Japan
- Prior art keywords
- idler
- belt
- tension
- tension device
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
【考案の詳細な説明】 (産業上の利用分野) 本考案はチェーン又はベルト等の伝導装置に於いてこれ
らベルト等の弛みを解消するために用いられるテンショ
ン装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a tension device used in a transmission device such as a chain or a belt for eliminating looseness of the belt or the like.
(従来の技術) 従来、この種テンション装置としては例えば第5図に示
す如く、アイドラー6を軸着してなるホルダー5aを基板
1aに沿ってスライド可能に設けて、前記ホルダー5aにコ
イルバネ20により引張力を作用させた様なものが公知で
ある。(Prior Art) Conventionally, as a tension device of this type, for example, as shown in FIG. 5, a holder 5a formed by axially attaching an idler 6 to a substrate is used.
It is known that the holder 5a is slidably provided and a tensile force is applied to the holder 5a by a coil spring 20.
(考案が解決しようとする問題点) しかしながら、前記従来のアイドラー6を付勢してなる
コイルバネ20は、第6図の如くその伸びlと引張力Fと
は正比例関係にあるために、例えば前記従来の装置を第
7図の如くセッティングしてプーリ21、21間のベルト11
を緊張させる場合には、同図(イ)のバネ20を大きく伸
ばした初期の設定状態では該バネ20の弾発力F(引張
力)が非常に大きく好適なベルト緊張が行えるものの、
その後同図(ロ)の如くベルト11が大きな伸びを生じて
バネ20の伸びが小さくなった場合にはこれに対応してそ
の弾発力Fが小さくなって、ベルト11の弛みを解消でき
なくなる様な不都合な事態が生じていた。(Problems to be solved by the invention) However, in the conventional coil spring 20 that biases the idler 6, as shown in FIG. 6, the elongation l and the tensile force F are in a direct proportional relationship. The belt 11 between the pulleys 21 and 21 is set by setting the conventional device as shown in FIG.
In the case of tensioning, the elastic force F (tensile force) of the spring 20 is very large in the initial setting state in which the spring 20 of FIG.
After that, when the belt 11 expands greatly and the expansion of the spring 20 decreases as shown in FIG. 6B, the elastic force F decreases correspondingly and the slack of the belt 11 cannot be eliminated. There was such an inconvenient situation.
従って、従来に於いてはベルト11等を長期に渡って常時
均等に緊張させることができず、テンション装置の取付
位置を短期間で設定変更し直す必要が生じる等、その取
扱いが煩雑となる難点を有していた。Therefore, in the conventional case, the belt 11 and the like cannot always be evenly tensioned over a long period of time, and it becomes necessary to change the setting position of the tension device in a short period of time. Had.
また、前記従来の手段に於いてアイドラー6の移動スト
ロークを大きくするには、長寸法のコイルバネ20を使用
せなばならないのであるが、この場合この種コイルバネ
20ではその最大許容伸び寸法が基本寸法に比して差ほど
大きく得られない。よって、アイドラー6の移動ストロ
ークを大きくとる場合にはテンション装置に於けるコイ
ルバネ20の占有スペースが非常に大きくなって、テンシ
ョン装置の取付けスペースに制約を受ける様な箇所には
簡易に使用できない様な支障を生じていた。Further, in order to increase the moving stroke of the idler 6 in the above-mentioned conventional means, it is necessary to use the long-sized coil spring 20. In this case, this type of coil spring is used.
In No. 20, the maximum allowable elongation dimension is not as large as the difference from the basic dimension. Therefore, when the moving stroke of the idler 6 is large, the space occupied by the coil spring 20 in the tension device becomes very large, and it cannot be easily used in a place where the installation space of the tension device is restricted. There was a problem.
尚、上記の如き問題点は引張バネに限らず、圧縮バネを
使用した場合にも発生していたことは言う迄もない。Needless to say, the above-mentioned problems are not limited to the tension spring but also occur when the compression spring is used.
本考案は上記の如き従来の問題点に鑑みて考案されたも
ので、その目的とするところは、ベルト等の伸びに関係
なく常時該ベルト等に一定の張力を付与させて、テンシ
ョン装置の頻繁な設定作業の必要性を解消せしめると共
に、テンション装置を何ら大型化させることなくコンパ
クトなものとしてアイドラーの移動ストロークを大きく
させる点にある。The present invention has been devised in view of the conventional problems as described above, and the purpose thereof is to constantly apply a constant tension to the belt or the like regardless of the elongation of the belt or the like, and to frequently use the tension device. This eliminates the need for various setting work and increases the moving stroke of the idler as a compact tension device without making it large.
(問題点を解決するための手段) 本考案はアイドラーを従来のコイルバネ等にて付勢させ
るのではなく、バネの伸び寸法に無関係に一定の弾発力
を有してその変動寸法も大きく出来るバネを利用するこ
とにより、上記従来の問題点を解決せんとして構成され
たものである。(Means for Solving Problems) The present invention does not urge the idler with a conventional coil spring or the like, but has a constant resilience regardless of the extension dimension of the spring and can increase the variable dimension thereof. By using a spring, the above-mentioned conventional problems are not solved.
すなわち、本考案の構成の要旨は、循環走行するベルト
等の無端体11に所定のテンションを付与するためのアイ
ドラー6を支持するホルダー5,13が、固定側に往復動又
は揺動自在に取付けられ、アイドラー6を無端体11に押
圧付勢させる押圧手段を備えたベルト等用のテンション
装置において、前記押圧手段は、薄肉帯状の可撓性部材
を引き伸ばし可能に巻回して形成され且つ巻回状態への
弾性復元力を有する定張力バネ9からなり、該引き伸ば
された定張力バネ9の弾性復元力により上記アイドラー
6を無端体11に所定の力で押圧すべく、定張力バネ9の
一方は前記固定側に取付けられ、他方は前記ホルダー5
に取付けられてなる点にある。That is, the gist of the configuration of the present invention is that the holders 5 and 13 for supporting the idler 6 for imparting a predetermined tension to the endless body 11 such as the circulating belt are reciprocally or swingably mounted on the fixed side. In a tension device for a belt or the like having a pressing means for pressing and biasing the idler 6 against the endless body 11, the pressing means is formed by winding a thin strip-shaped flexible member so that the flexible member can be stretched and wound. A constant tension spring 9 having an elastic restoring force to the state. One of the constant tension springs 9 is used to press the idler 6 against the endless body 11 with a predetermined force by the elastic restoring force of the stretched constant tension spring 9. Is attached to the fixed side, and the other is the holder 5
It is attached to.
(作用) 従って、上記構成を特徴とするテンション装置に於いて
は、定張力バネ9がその伸びの寸法の大きさに関係なく
常時一定の弾発力を発揮するために、テンションを付与
するベルト等の無端体11に伸び等が生じてアイドラー6
の位置が変更されても、該アイドラー6によるベルト等
の無端体11への押圧力は常時一定となって、常に該ベル
ト等の無端体11を適切な状態に緊張させることができる
こととなる。(Operation) Therefore, in the tension device characterized by the above structure, the constant tension spring 9 always exerts a constant elastic force irrespective of the size of its extension, so that a belt is provided with tension. The endless body 11 such as stretches and the like and the idler 6
Even if the position is changed, the pressing force of the idler 6 against the endless body 11 such as a belt is always constant, and the endless body 11 such as the belt can be always tensioned in an appropriate state.
また、該定張力バネ9自体は薄肉帯状部材を巻回して構
成されたものであるために、その外径が小さい場合であ
ってもその伸び寸法は大きくでき、従ってアイドラー6
の移動ストロークを大きくした場合であっても定張力バ
ネ9の占めるスペースを小さくできることとなる。Further, since the constant tension spring 9 itself is formed by winding a thin band-shaped member, its extension dimension can be increased even when its outer diameter is small, and therefore the idler 6
Even if the moving stroke of the constant tension spring 9 is increased, the space occupied by the constant tension spring 9 can be reduced.
(実施例) 以下、本考案の実施例について図面を参照して説明す
る。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第1図に於いて、1はテンション装置のフレーム等への
取付用のボルト挿通孔2…を適宜穿設してなる略平板状
の固定側としての基板を示し、該基板1の上面側には内
奥に幅広部3を有する蟻柄状のガイド溝4が刻設されて
いる。In FIG. 1, reference numeral 1 denotes a substantially flat plate-shaped base plate on the upper surface side of which a bolt insertion hole 2 for mounting a tension device to a frame or the like is appropriately formed. A dovetail-shaped guide groove 4 having a wide portion 3 is engraved on the inner side.
5は前記ガイド溝4と合致した断面形状を有して該ガイ
ド溝4に係合状態で嵌合されて基板1の上面側にスライ
ド可能に設けられたホルダーを示す。6は該ホルダー5
の上面部に螺着して突設された軸7にベアリング8を介
して軸着されたアイドラーを示し、一例としてチェーン
スプロケットの態様をなす。Reference numeral 5 denotes a holder having a cross-sectional shape that matches the guide groove 4, fitted in the guide groove 4 in an engaged state, and slidably provided on the upper surface side of the substrate 1. 6 is the holder 5
1 shows an idler that is axially mounted via a bearing 8 to a shaft 7 that is threadedly mounted on the upper surface of the shaft 7, and is in the form of a chain sprocket.
9は薄肉帯状に形成されたバネ鋼等の可撓性部材が巻回
されて、その巻回状態への弾性復元力を有すべく構成さ
れた定張力バネを示し、該定張力バネ9の引き伸ばし可
能に巻回された一方、はその中心孔部に軸10が挿通され
て基板1のガイド溝4内の一端部側に固定されてなり、
また該定張力バネ9の他方の先端部9a側はホルダー5の
下面側を通過して該ホルダー5の後部側に止着連結され
ている。Reference numeral 9 denotes a constant tension spring which is formed by winding a flexible member such as spring steel formed in a thin strip shape and has an elastic restoring force to the wound state. On the other hand, while being wound so that it can be stretched, the shaft 10 is inserted into the central hole portion thereof and is fixed to one end side of the guide groove 4 of the substrate 1,
The other end 9a side of the constant tension spring 9 passes through the lower surface side of the holder 5 and is fixedly connected to the rear side of the holder 5.
尚、前記定張力バネ9は第2図に示す如く初期の一定の
伸び寸法la(例えば数mm)以上の値ではその後の伸び寸
法lの大きさに関係なく常に一定の弾発力Fを発揮する
ものである。As shown in FIG. 2, the constant tension spring 9 always exerts a constant elastic force F at a value equal to or larger than the initial constant extension dimension la (for example, several mm) regardless of the subsequent extension dimension l. To do.
本実施例は以上の構成からなるために、先ず前記第1図
の如くアイドラー6を同図二点鎖線に示す如き所定の伝
導装置の循環走行チェーン11に歯合させて、該チェーン
11を引き伸ばされた定張力バネ9の引張力により矢印a
方向に常時付勢させることにより、チェーン11を適度に
緊張させて該チェーン11の弛みを解消させることができ
る。Since the present embodiment is constructed as described above, first, the idler 6 as shown in FIG. 1 is meshed with the circulating traveling chain 11 of a predetermined transmission device as shown by the chain double-dashed line in FIG.
Arrow a by the tensile force of the constant tension spring 9 that has been stretched
By always urging the chain 11 in the direction, the chain 11 can be appropriately tensioned and the slack of the chain 11 can be eliminated.
而して、その後使用中に於いてチェーン11の弛み寸法が
増大されるに連れてアイドラー6が定張力バネ9の引張
力により第3図の如く前進されるが、その際定張力バネ
9の伸び寸法lが変化してもアイドラー6に対する引張
力は一定であるために、前記チェーン11は初期設定時と
同等なテンションが付与されて、適切な緊張状態を維持
する。Then, during use, the idler 6 is advanced by the tensile force of the constant tension spring 9 as shown in FIG. 3 as the slack size of the chain 11 is increased. Since the tensile force with respect to the idler 6 is constant even if the extension dimension 1 changes, the chain 11 is given the same tension as at the time of initial setting and maintains an appropriate tension state.
また、前記定張力バネ9は薄肉帯状部材を巻回させたも
のであるために、その巻回外径寸法Dはその最大伸び寸
法に比してかなり小さなものにでき、よって小さな巻回
外径寸法の定張力バネ9を使用した場合であってもアイ
ドラー6の移動ストロークを非常に大きく設定できるこ
ととなる。Further, since the constant tension spring 9 is formed by winding a thin band-shaped member, the winding outer diameter dimension D can be made considerably smaller than the maximum extension dimension, and thus the small winding outer diameter can be obtained. Even when the constant tension spring 9 having a size is used, the movement stroke of the idler 6 can be set to be extremely large.
従って、チェーン11の弛み寸法がかなり大きくなった場
合であっても、アイドラー6がこれに対応して長寸法前
進されてチェーン11を常時均等な力でに押圧することと
なって、テンション装置の取付設定位置を何ら頻繁に設
定し直す様なことなく、該チェーン11の適度な緊張を継
続して維持させることができることとなる。Therefore, even when the slack size of the chain 11 becomes considerably large, the idler 6 is advanced by a correspondingly long size and constantly presses the chain 11 with an even force, so that the tension device The appropriate tension of the chain 11 can be continuously maintained without frequently resetting the attachment setting position.
尚、上記実施例に於いては、アイドラー6をスライド方
式で設けてなるが、本考案は決してこれに限定されず、
例えば第4図の如く軸12を支点として揺動可能に設けら
れた揺動アームからなるホルダー13の先端部にアイドラ
ー6を設けて、前記アーム13に定張力バネ9を接続する
ことによりアイドラー6を弾力付勢させた状態で往復揺
動させる様にしても何ら構わない。In the above embodiment, the idler 6 is provided as a slide type, but the present invention is not limited to this.
For example, as shown in FIG. 4, an idler 6 is provided at the tip of a holder 13 composed of a swing arm that is swingable around a shaft 12 as a fulcrum, and a constant tension spring 9 is connected to the arm 13 so that the idler 6 It does not matter even if it is reciprocally rocked with the elastically biased.
また、本考案は各部の構成も決して上記実施例の如く限
定されず、その具体的な構成は全て本考案の意図する範
囲内で設計変更自在であり、要は定張力バネ9によって
アイドラー6を弾力付勢させておればよいのである。Further, the present invention is not limited to the configuration of each part as in the above-described embodiment, and the specific configuration can be changed in design within the scope intended by the present invention. The point is that the idler 6 is fixed by the constant tension spring 9. You just have to urge it elastically.
尚、本考案に係る定張力バネ9はバネ鋼以外の金属製材
質の他、合成樹脂等によっても製作できるものである
が、要は薄肉帯状の可撓性部材を巻回させた態様をなし
て、伸び寸法に関係なく一定の弾発力を発揮するもので
あればよい。The constant tension spring 9 according to the present invention can be made of synthetic resin or the like in addition to metal materials other than spring steel, but the point is that a thin band-shaped flexible member is wound. Therefore, any material can be used as long as it exhibits a constant elastic force regardless of the elongation dimension.
その他、本考案はその具体的な用途は決してチェーン伝
導装置に限定されず、当然ながら他のベルト類、即ち、
Vベルト、平ベルト、タイミングベルト、及びコンベア
用のベルト等の各種ベルトのテンション付与に使用でき
るものであり、その具体的な適用対象は問うものではな
い。よって、アイドラー6の形態もチェーンスプロケッ
ト以外として、単なるローラ状のものにする等の変更は
自在である。In addition, the present invention is not limited in its specific application to a chain transmission device, and naturally, other belts, that is,
It can be used to apply tension to various belts such as V-belts, flat belts, timing belts, and conveyor belts, and its specific application target does not matter. Therefore, the idler 6 can be changed to a simple roller shape other than the chain sprocket.
(考案の効果) 叙上の様に、本考案は前記押圧手段が、薄肉帯状の可撓
性部材を引き伸ばし可能に巻回して形成され且つ巻回状
態への弾性復元力を有する定張力バネからなり、該引き
伸ばされた定張力バネの弾性復元力により上記アイドラ
ーを無端体に所定の力で押圧すべく、定張力バネの一方
は前記固定側に取付けられ、他方は前記ホルダーに取付
けられているので、ベルト等の無端体が伸びた場合に
は、無端体の伸びに応じてホルダーは、定張力バネの弾
性復元力により、アイドラー6が無端体を押圧する方向
に前進するが、上記定張力バネは引き伸ばし量とは無関
係に一定の引張力を有することから、ホルダー5の任意
の位置においてアイドラー6を無端体に一定の力で押圧
させることができ、無端体が伸びる以前の所定のテンシ
ョンを維持することができる。(Effect of the Invention) As described above, according to the present invention, the pressing means is composed of a constant tension spring which is formed by winding a thin band-shaped flexible member so as to be stretchable and has an elastic restoring force to the wound state. One of the constant tension springs is attached to the fixed side and the other is attached to the holder so that the idler is pressed against the endless body with a predetermined force by the elastic restoring force of the stretched constant tension spring. Therefore, when an endless body such as a belt extends, the holder moves forward in the direction in which the idler 6 presses the endless body due to the elastic restoring force of the constant tension spring according to the extension of the endless body. Since the spring has a constant tensile force irrespective of the amount of extension, the idler 6 can be pressed against the endless body with a constant force at any position of the holder 5, and the predetermined tension before the endless body is stretched. Can be maintained.
従って、従来の如く無端体の伸びが大きくなる度に、テ
ンション装置の取付け位置を頻繁に設定し直す様な煩雑
な手間が不要となり、例えばテンション装置を手の入ら
ないようなスペースの少ない場所に設置しても、無端体
のテンションの調整が不要となり、非常に便利である。Therefore, every time the endless body grows larger as in the conventional case, the troublesome work of frequently resetting the mounting position of the tension device becomes unnecessary, and for example, the tension device can be installed in a small space where it cannot be accessed. Even if it is installed, it is very convenient because there is no need to adjust the tension of the endless body.
また、定張力バネは薄肉帯状部材を巻回して構成された
もので、その外径が小さい場合であってもその伸び寸法
を非常に大きくできるために、従来のコイルバネを用い
た手段の如くテンション装置全体に占めるバネのスペー
スが大きくなる様なことがなく、アイドラーの移動スト
ロークを大きくして場合であっても定張力バネの占有ス
ペースを小さくして、テンション装置全体をコンパクト
に製作でき、その結果取付スペース等に制約を受ける様
な用途にも適切な使用が行えるという好ましい実益をも
有するに至った。In addition, the constant tension spring is constructed by winding a thin band member, and even if the outer diameter is small, the extension dimension can be made very large. The spring space occupied by the entire device does not become large, and even if the idler movement stroke is increased, the space occupied by the constant tension spring can be reduced and the entire tension device can be manufactured compactly. As a result, it has a favorable practical benefit that it can be used properly even in applications where the mounting space is restricted.
第1図は本考案に係る装置の一実施例を示し、同図
(イ)は正面断面図、同図(ロ)は側面断面図、同図
(ハ)は平面図。 第2図は定張力バネの弾力特性を示す説明図。 第3図は動作状態を示す正面断面図。 第4図は他の実施例を示す説明図。 第5図乃至第7図は従来例を示し、第5図は装置の概略
正面図、第6図はバネの特性を示す説明図、第7図
(イ)、(ロ)は使用状態の説明図。 6……アイドラー、9……定張力バネ 11……ベルト,チェーンFIG. 1 shows an embodiment of the device according to the present invention. FIG. 1 (a) is a front sectional view, FIG. 1 (b) is a side sectional view, and FIG. 1 (c) is a plan view. FIG. 2 is an explanatory view showing the elastic characteristic of the constant tension spring. FIG. 3 is a front sectional view showing an operating state. FIG. 4 is an explanatory view showing another embodiment. FIGS. 5 to 7 show a conventional example, FIG. 5 is a schematic front view of the apparatus, FIG. 6 is an explanatory view showing characteristics of a spring, and FIGS. Fig. 6 …… idler, 9 …… constant tension spring 11 …… belt, chain
Claims (2)
テンションを付与するためのアイドラー6を支持するホ
ルダー5,13が、固定側に往復動又は揺動自在に取付けら
れ、アイドラー6を無端体11に押圧付勢させる押圧手段
を備えたベルト等用のテンション装置において、前記押
圧手段は、薄肉帯状の可撓性部材を引き伸ばし可能に巻
回して形成され且つ巻回状態への弾性復元力を有する定
張力バネ9からなり、該引き伸ばされた定張力バネ9の
弾性復元力により上記アイドラー6を無端体11に所定の
力で押圧すべく、定張力バネ9の一方は前記固定側に取
付けられ、他方は前記ホルダー5,13に取付けられてなる
ことを特徴とするベルト等用のテンション装置。1. Holders 5, 13 for supporting an idler 6 for applying a predetermined tension to an endless body 11 such as a circulating belt are attached to a fixed side so as to reciprocate or swing, and the idler 6 In a tension device for a belt or the like including a pressing unit that presses and urges the endless body 11, the pressing unit is formed by winding a thin strip-shaped flexible member so that it can be stretched and elastically restored to a wound state. In order to press the idler 6 against the endless body 11 with a predetermined force by the elastic restoring force of the stretched constant tension spring 9, one of the constant tension springs 9 is fixed to the fixed side. A tension device for a belt or the like, characterized in that the tension device is attached, and the other is attached to the holders 5 and 13.
プロケット又はローラである実用新案登録請求の範囲第
1項記載のベルト等用のテンション装置。2. A tension device for a belt or the like according to claim 1, wherein the idler 6 is a rotatable chain sprocket or roller.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987036180U JPH0711026Y2 (en) | 1987-03-11 | 1987-03-11 | Tension device for belts, etc. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987036180U JPH0711026Y2 (en) | 1987-03-11 | 1987-03-11 | Tension device for belts, etc. |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63142292U JPS63142292U (en) | 1988-09-20 |
JPH0711026Y2 true JPH0711026Y2 (en) | 1995-03-15 |
Family
ID=30846348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987036180U Expired - Lifetime JPH0711026Y2 (en) | 1987-03-11 | 1987-03-11 | Tension device for belts, etc. |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0711026Y2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54114255U (en) * | 1978-01-30 | 1979-08-10 | ||
JPS5820993U (en) * | 1981-08-04 | 1983-02-09 | 三ツ星ベルト株式会社 | Bicycle drive timing belt tensioner |
-
1987
- 1987-03-11 JP JP1987036180U patent/JPH0711026Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS63142292U (en) | 1988-09-20 |
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