JPH08210315A - Brake device for air cylinder - Google Patents
Brake device for air cylinderInfo
- Publication number
- JPH08210315A JPH08210315A JP5030295A JP5030295A JPH08210315A JP H08210315 A JPH08210315 A JP H08210315A JP 5030295 A JP5030295 A JP 5030295A JP 5030295 A JP5030295 A JP 5030295A JP H08210315 A JPH08210315 A JP H08210315A
- Authority
- JP
- Japan
- Prior art keywords
- piston rod
- brake
- brake member
- point
- reaction
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/262—Locking mechanisms using friction, e.g. brake pads
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Braking Arrangements (AREA)
Abstract
Description
【０００１】［産業上の利用分野］従来、エァーシリン
ダを使用している極めて広範囲な分野で特に落下防止、
非常停止、及び中間停止を目的とする場合に利用する。[Industrial field of use] Conventionally, in a very wide range of fields where an air cylinder is used, especially fall prevention,
It is used for the purpose of emergency stop and intermediate stop.
【０００２】［従来技術］スプリング力により傾いたリ
ングがシリンダ推力でさらにその傾度を増加させてピス
トンロッドを確実にロックするエァーシリンダ（ロック
アップシリンダ）。[Prior Art] An air cylinder (lock-up cylinder) in which a ring tilted by a spring force further increases its tilt by a cylinder thrust to securely lock a piston rod.
【０００３】［発明が解決しようとする課題］従来技術
に於いては、ブレーキ部材をリング状にしているために
シリンダ推力に対してのみ摩擦力が働き、回転モーメン
トの反力が摩擦力として生じる構造となっていない。故
に、安定性、耐久性、小型化、低価格化等の面で難点が
あり、いまだに市場を満足させていない。前記難点を解
決することを課題としている。[Problems to be Solved by the Invention] In the prior art, since the brake member is ring-shaped, a frictional force acts only on the cylinder thrust, and a reaction force of the rotational moment is generated as a frictional force. It is not structured. Therefore, there are drawbacks in terms of stability, durability, downsizing, price reduction, etc., and it has not yet satisfied the market. The object is to solve the above-mentioned difficulties.
【０００４】［課題を解決しようとするための手段］ブ
レーキ部材２、３のピストンロッド５に接する部分を図
１のごとく切り欠き、回転モーメントに平行な分力をで
きるだけ少なくし、逆に、回転モーメントに直角な分力
を増大させる。[Means for Solving the Problem] As shown in FIG. 1, the portions of the brake members 2 and 3 in contact with the piston rod 5 are notched so that the component force parallel to the rotational moment is reduced as much as possible, and conversely the rotation is performed. Increase the component force perpendicular to the moment.
【０００５】［作用］図面にしたがって説明する。図２
において、図２はブレーキがかかった状態であり、ハウ
ジング１の左端に設けられたエァーポートから排気され
てピストン５はフリーの状態である。ブレーキ部材２は
スプリング６によりＡ点を支点として左方向に回転モー
メントを与えられている。又、ブレーキ部材３もスプリ
ング６によりＢ点を支点として左方向に回転モーメント
を与ええられている。ブレーキ部材２，３はピスントロ
ッド４に微少なすきまで嵌合されており回転することに
よりピストンロッド４に摩擦ブレーキがかかる。ピスト
ンロッド４が左方向に動くとブレーキ部材２にＡ点を支
点とした回転モーメントがスプリング６のみならずシリ
ンダ推力による分も加わる。又、ピストンロッド４が右
方向に動くとブレーキ部材にＢ点を支点としてシリンダ
推力による分も加わる。次に、ブレーキを開放する場合
について述べる。図２に於いてハウジング１に設けられ
たエァーポートから給気されるとピストン５が右方向に
押される、従ってピストン５はブレーキ部材２にＣ点を
支点として右方向の回転モーメントをあたえる、これに
つれてブレーキ部材２はＤ点に於いてブレーキ部材３に
Ｂ点を支点とした右方向の回転モーメントを与える。こ
の結果最終的に図３に示すブレーキ開放状態となる。次
に、本願発明の要旨はピストンロッド４とブレーキ部材
２、３の嵌合部にあり以下図１において述べる。ブレー
キ部材２とピストンロッド４の嵌合部はピストンロッド
４の外周とすきまばめのはめあい状態にあるものの一部
を切り欠いた形状になっている。又、ブレーキ部材３に
ついても同様である。故に、ブレーキ部材２、３に回転
モーメントがかかった場合の反力から切欠き部分の反力
を取り除いたことになる。[Operation] The operation will be described with reference to the drawings. Figure 2
2 shows a state in which the brake is applied, and the piston 5 is in a free state because the air is exhausted from the air port provided at the left end of the housing 1. The brake member 2 is given a rotational moment to the left by the spring 6 with the point A as a fulcrum. The brake member 3 is also given a rotational moment to the left by the spring 6 with the point B as a fulcrum. The brake members 2 and 3 are fitted to the pistun rod 4 to a very small clearance, and the piston rod 4 is frictionally braked by rotating. When the piston rod 4 moves leftward, not only the spring 6 but also the cylinder thrust force adds a rotational moment to the brake member 2 about the point A. Further, when the piston rod 4 moves to the right, a portion due to the cylinder thrust is added to the brake member with the point B as a fulcrum. Next, the case of releasing the brake will be described. In FIG. 2, when air is supplied from the air port provided in the housing 1, the piston 5 is pushed to the right. Therefore, the piston 5 applies a rotational moment in the right direction to the brake member 2 with the point C as a fulcrum. At the point D, the brake member 2 gives a rightward rotational moment to the brake member 3 about the point B as a fulcrum. As a result, the brake is finally released as shown in FIG. Next, the gist of the present invention resides in the fitting portion between the piston rod 4 and the brake members 2 and 3, which will be described below with reference to FIG. The fitting portion between the brake member 2 and the piston rod 4 has a shape in which a part of the fitting portion of the piston rod 4 which is in a clearance fit with the outer periphery is cut out. The same applies to the brake member 3. Therefore, the reaction force of the notch portion is removed from the reaction force when the rotational moment is applied to the brake members 2 and 3.
【０００６】［実施例］エァーシリンダ内径６３ｍｍ、
ピストンロッド外径２０ｍｍ、ブレーキ部材の切り欠き
幅１８ｍｍ。以上の構造で実施した結果、本願発明の技
術思想を裏付ける明確な結果がでている。[Embodiment] 63 mm inner diameter of air cylinder,
Piston rod outer diameter 20 mm, brake member notch width 18 mm. As a result of implementing the above structure, there are clear results that support the technical idea of the present invention.
【０００７】［発明の効果］ブレーキ部材２、３に回転
モーメントＭを与えた場合のピストンロッド４からの反
力を回転モーメントと平行な分力Ｒと回転モーメントに
直角な分力ｒとに分解して考えた場合次式が成立する。 Ｍ＝Ｒｌ＋ｋｒｌ （１） （ｌはブレーキ部材２の反力間の回転半径であり、ｋは
摩擦係数である。） 次に、シリンダ推力をＦとした場合に次式が成立する。 Ｆ＝ｋＲ＋ｋｒ （２） 以下、極論的に判断すると次のようになる。平行な分力
だけ即ちｒ＝０とすれば （１）、（２）式から Ｆ＝Ｍｋ／ｌ （３） となり、直角な分力だけ即ちＲ＝０とすれば、同様に Ｆ＝Ｍ／ｌ （４） となる。ここで、Ｆによる回転モーメントを除外したＦ
の値はスプリングだけの回転モーメントであり安定性
（初期スリップを無くし確実にロックする）を比較する
値となる。（３）、（４）式を比較すると直角分力の場
合が平行分力の場合の１／ｋとなり例えばｋ＝０．２と
する５倍の安定性があことになる。又、（３）、（４）
式に於いてＦを一定としてＭを比較すると使用するスプ
リング力を１／５にできるということであり、又、ブレ
ーキ開放力も１／５で良く、このことが小型化及び低価
格化を可能にする要因である。次に、耐久性について述
べる。（３）、（４）式の１の値で耐久性の比較が出来
る（即ち、ブレーキ面圧を下げ得る要因となる。ｋ＝
０．２とすると回転モーメントに直角な反力の場合は平
行な反力の５倍の耐久性を可能にする。以上に述べた発
明の効果は全くの極論であり、本願発明が従来技術と比
較して量的な相違のみならず質的な相違を発揮する点を
明確にしたに過ぎない。次に、実際の数値として、実施
例等についての計算値を示す。実施例で使用したブレー
キ部材（ピストンロッド径２０ｍｍ、切り欠き幅１８ｍ
ｍについて計算すると、Ｒとｒの比は０．４４対０．９
となり、前記極論で示した５倍の数値は実施例では２．
１６倍ということになる。ちなみに、ブレーキ部材の切
り欠き幅を１９ｍｍとして計算すると上記値は２．５倍
となる。[Advantages of the Invention] The reaction force from the piston rod 4 when the rotation moment M is applied to the brake members 2 and 3 is decomposed into a component force R parallel to the rotation moment and a component force r perpendicular to the rotation moment. Then, the following equation is established. M = Rl + krl (1) (l is the radius of gyration between the reaction forces of the brake member 2 and k is the coefficient of friction.) Next, when the cylinder thrust is F, the following equation holds. F = kR + kr (2) The following is a theoretical determination as follows. If only parallel component force is set, that is, r = 0, then (1) and from the equation (2), F = Mk / l (3), and if only right-angled component force is set, that is, R = 0, then F = M / l (4). Here, F excluding the rotational moment due to F
The value of is the rotational moment of only the spring and is a value for comparing stability (locking securely without initial slip). Comparing equations (3) and (4), the case of the right-angled component force is 1 / k of the case of the parallel component force, and, for example, 5 times the stability where k = 0.2 is obtained. Also, (3), (4)
In the formula, if F is kept constant and M is compared, it means that the spring force used can be reduced to 1/5, and the brake opening force can be reduced to 1/5, which enables downsizing and cost reduction. Is a factor. Next, durability will be described. The durability can be compared with the value of 1 in the equations (3) and (4) (that is, it is a factor that can reduce the brake surface pressure. K =
With a value of 0.2, in the case of a reaction force perpendicular to the rotation moment, durability of 5 times that of a parallel reaction force is possible. The effects of the invention described above are completely extreme, and merely clarify that the invention of the present application exhibits not only a quantitative difference but also a qualitative difference as compared with the prior art. Next, as actual numerical values, calculated values for Examples and the like are shown. Brake member used in the examples (piston rod diameter 20 mm, notch width 18 m
When calculated for m, the ratio of R and r is 0.44 to 0.9
Therefore, the numerical value of 5 times shown in the extreme theory is 2.
It means 16 times. By the way, if the notch width of the brake member is calculated as 19 mm, the above value becomes 2.5 times.
【図１】ブレーキ部を表す図で、図３のＡ−Ｂ断面図。FIG. 1 is a view showing a brake unit and is a cross-sectional view taken along the line AB of FIG.
【図２】ブレーキがかかった状態を表す軸方向断面図。FIG. 2 is an axial sectional view showing a braked state.
【図３】ブレーキ開放状態を表す軸方向断面図。FIG. 3 is an axial sectional view showing a brake released state.
【符号の説明】 （１）はハウジング。 （２）は左方向用ブレーキ部材。 （３）は右方向用ブレーキ部材。 （４）はピストンロッド。 （５）はブレーキ解放用ピストン。 （６）はスプリング。 （７）、（８）、（９）はＯ−リング。 Ａ、Ｂ、Ｃはそれぞれ支点を表し、Ｄは作用点を表す。[Explanation of symbols] (1) is a housing. (2) is a brake member for the left direction. (3) is a brake member for the right direction. (4) is a piston rod. (5) is a piston for releasing the brake. (6) is a spring. (7), (8), and (9) are O-rings. A, B, and C represent fulcrums, and D represents an action point.
Claims (1)
ブレーキ部材を取り付け、該ブレーキ部材にピストンロ
ッド中心軸を含む平面にそって回転モーメントを与える
ことによりピストンロッドと該ブレーキ部材の間に摩擦
力を生じさせてピストンロッドにブレーキをかける装置
に於て、該ブレーキ部材をピストンロッド外周に部分的
に接させることにより、前記回転モーメントに平行な反
力の大半を取り除き前記回転モーメントに直角な反力を
増大させたことを特徴とするエァーシリンダのブレーキ
装置。1. A brake member is attached to the outer circumference of a piston rod of an air cylinder, and a frictional force is applied between the piston rod and the brake member by applying a rotational moment to the brake member along a plane including the piston rod center axis. In a device for generating and braking a piston rod, by partially contacting the brake member with the outer circumference of the piston rod, most of the reaction force parallel to the rotation moment is removed and the reaction force perpendicular to the rotation moment is removed. The brake device for the air cylinder, which is characterized by increasing the.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5030295A JPH08210315A (en) | 1995-01-31 | 1995-01-31 | Brake device for air cylinder |
| US08/702,698 US5823300A (en) | 1995-01-31 | 1996-01-24 | Brake device of linear moving body |
| PCT/JP1996/000121 WO1996023979A1 (en) | 1995-01-31 | 1996-01-24 | Brake system for linearly movable bodies |
| KR1019960705044A KR100259746B1 (en) | 1995-01-31 | 1996-01-24 | Brake system for linearly movable bodies |
| EP96901102A EP0753670B1 (en) | 1995-01-31 | 1996-01-24 | Brake system for linearly movable bodies |
| DE69610798T DE69610798T2 (en) | 1995-01-31 | 1996-01-24 | BRAKE SYSTEM FOR A MOVABLE BODY |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5030295A JPH08210315A (en) | 1995-01-31 | 1995-01-31 | Brake device for air cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08210315A true JPH08210315A (en) | 1996-08-20 |
Family
ID=12855109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5030295A Pending JPH08210315A (en) | 1995-01-31 | 1995-01-31 | Brake device for air cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08210315A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014080138A (en) * | 2012-10-18 | 2014-05-08 | Fujikura Rubber Ltd | Air cylinder device with drop-preventing mechanism |
-
1995
- 1995-01-31 JP JP5030295A patent/JPH08210315A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014080138A (en) * | 2012-10-18 | 2014-05-08 | Fujikura Rubber Ltd | Air cylinder device with drop-preventing mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Effective date: 20040706 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A02 | Decision of refusal |
Effective date: 20041221 Free format text: JAPANESE INTERMEDIATE CODE: A02 |