JPS63231029A - Rotary fluid damper - Google Patents
Rotary fluid damperInfo
- Publication number
- JPS63231029A JPS63231029A JP6000987A JP6000987A JPS63231029A JP S63231029 A JPS63231029 A JP S63231029A JP 6000987 A JP6000987 A JP 6000987A JP 6000987 A JP6000987 A JP 6000987A JP S63231029 A JPS63231029 A JP S63231029A
- Authority
- JP
- Japan
- Prior art keywords
- rotation
- fluid
- damper
- case
- rotating body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 31
- 230000003313 weakening effect Effects 0.000 claims 1
- 239000004519 grease Substances 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/145—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only rotary movement of the effective parts
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はロータリー流体ダンパーに関し、詳しくは流体
を充填したケース内に回転体を回転自在に嵌合して構成
され、前記回転体に加えられる回転力を前記流体の抵抗
により弱めるダンパー作用を果すロータリー流体ダンパ
ーに関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotary fluid damper, and more particularly, it is constructed by rotatably fitting a rotating body into a case filled with fluid, and a rotary fluid damper is applied to the rotary body. The present invention relates to a rotary fluid damper that acts as a damper to weaken rotational force by the resistance of the fluid.
［従来の技術］
この種のダンパーとして上記流体にグリスなどのオイル
を用いたロータリーオイルダンパーが知られている。[Prior Art] As a damper of this type, a rotary oil damper using oil such as grease as the fluid is known.
従来のロータリーオイルダンパーの構造によれば、ケー
スと回転体のオイルに接して互いに対向する面は平面に
構成されており、回転体の回転に対するオイルの抵抗は
回転方向に関わらず同じになっている。According to the structure of a conventional rotary oil damper, the surfaces of the case and the rotating body that are in contact with the oil and face each other are configured as flat surfaces, and the resistance of the oil to the rotation of the rotating body is the same regardless of the direction of rotation. There is.
従って回転方向によるダンパー作用の強さは同じになっ
ている。Therefore, the strength of the damper action is the same depending on the direction of rotation.
［発明が解決しようとする問題点］
ところで回転運動を伝達する各種の伝動機構においては
、二方向の回転運動に対して一方向には強いダンパー作
用を必要とし、逆方向には弱いダンパー作用しか働かな
い方がよいような場合がある。[Problems to be Solved by the Invention] By the way, in various transmission mechanisms that transmit rotational motion, a strong damper action is required in one direction for rotational motion in two directions, and only a weak damper action is required in the opposite direction. There are times when it is better not to work.
ところが従来のロータリーオイルダンパーは上述のよう
に回転方向によってダンパー作用の強さは同じであるの
でこのような場合には使用できないという問題があった
。However, the conventional rotary oil damper has a problem in that it cannot be used in such cases because the strength of the damping action is the same depending on the direction of rotation as described above.
［問題点を解決するための手段］
こような問題点を解決するため本発明によれば、流体を
充填したケース内に回転体を回転自在に嵌合して構成さ
れ、前記回転体に加えられる回転力を前記流体の抵抗に
より弱めるロータリー流体ダンパーにおいて、前記流体
の抵抗の大きさを前記回転体の回転方向によって異なら
せるように前記回転体および／またはケースの前記流体
に接する面の断面形状を構成した。[Means for Solving the Problems] In order to solve these problems, according to the present invention, a rotating body is rotatably fitted into a case filled with fluid, and in addition to the rotating body, A rotary fluid damper that weakens the rotational force caused by the fluid by the resistance of the fluid, wherein the cross-sectional shape of the surface of the rotating body and/or the case in contact with the fluid is such that the magnitude of the fluid resistance varies depending on the rotational direction of the rotating body. was constructed.
［作 用］
このような構造によれば流体の抵抗の大きさが回転体の
回転方向によって異なるので回転体の回転方向によって
ダンパー作用の強さが異なることになる。[Function] According to this structure, the magnitude of the fluid resistance differs depending on the rotational direction of the rotating body, so the strength of the damper action differs depending on the rotational direction of the rotating body.
［実施例］
以下、添付した図面を参照して本発明の実施例の詳細を
説明する。[Embodiments] Hereinafter, details of embodiments of the present invention will be described with reference to the attached drawings.
第１図及び第２図は本発明の実施例によるロータリーオ
イルダンパーの構造を説明する分解斜視図と組み立てた
状態の斜視図である。1 and 2 are an exploded perspective view and an assembled perspective view illustrating the structure of a rotary oil damper according to an embodiment of the present invention.
本実施例のロータリーオイルダンパーは第１図に示すケ
ースｌ１回転体２、キャップ３及びオイル４（第３図、
第４図参照）から構成される。The rotary oil damper of this embodiment consists of a case 11 shown in Fig. 1, a rotating body 2, a cap 3, and an oil 4 (Fig. 3,
(see Figure 4).
ケースｌはダンパー全体を支えるものであり、円形の凹
部１ｄを有した円盤状に形成されている。凹部１ｄの底
面の中央には回転板２を回転自在に受けるための受は軸
ＩＣが形成されている。又凹部１ｄの底面には、受は軸
１ｃの周囲の３６００の全領域を９０°ずつ４分割する
ように凹凸が形成されている。それぞれの凹凸は矢印Ａ
、Ｂ方向で示す回転板２の回転方向に対して直交する直
交面１ａと前記方向に対して傾斜した傾斜面１ｂから形
成されている。モして凹部１ｄ内にはグリス等の粘性の
高いオイル４が充填され、その上から回転板２が回転自
在に嵌合される。The case 1 supports the entire damper and is formed into a disk shape with a circular recess 1d. A shaft IC is formed at the center of the bottom surface of the recess 1d to rotatably receive the rotating plate 2. Further, on the bottom surface of the recessed portion 1d, unevenness is formed so that the entire area of 3600 around the shaft 1c is divided into four parts of 90 degrees each. Each unevenness is indicated by arrow A
, a perpendicular surface 1a that is perpendicular to the rotational direction of the rotary plate 2 shown in direction B, and an inclined surface 1b that is inclined with respect to the direction. The recess 1d is filled with highly viscous oil 4 such as grease, and the rotary plate 2 is rotatably fitted thereon.
回転板２は直径が凹部１ｄよりわずかに小さな円盤状に
形成されている０回転板２の中心には、このダンパーが
組み込まれる伝動機構においてダンパー作用を果すべき
回転力が加えられる回転軸２Ｃが回転板２と一体に形成
されている０回転軸２ｃは第１図中上面のみでなく、ケ
ース１の凹部１ｄの底面と対面する図中下面にも突き出
して形成されている。又回転板２の下面には、回転軸２
Ｃの周囲の３６０’の全領域を１８０’ずつ２等分する
凹凸が形成されている。それぞれの凹凸は回転板２の回
転方向の矢印Ａ、Ｂ方向に直交する直交面２ａとそれに
対して傾斜した傾斜面２ｂから形成されている。直交面
２ａと傾斜面２ｂの向きはケースｌの凹部１ｄ底面の直
交面１ａと傾斜面１ｂの逆向きになっている。The rotating plate 2 is formed into a disk shape with a diameter slightly smaller than the recess 1d. At the center of the rotating plate 2 is a rotating shaft 2C to which a rotational force to perform a damping action is applied in the transmission mechanism in which this damper is incorporated. The zero-rotation shaft 2c, which is integrally formed with the rotating plate 2, is formed to protrude not only from the upper surface in FIG. Also, on the bottom surface of the rotating plate 2, there is a rotating shaft 2.
Concave and convex portions are formed that divide the entire area of 360' around C into two equal parts of 180' each. Each unevenness is formed by an orthogonal surface 2a orthogonal to the directions of arrows A and B indicating the rotational direction of the rotary plate 2, and an inclined surface 2b inclined with respect to the orthogonal surface 2a. The directions of the orthogonal surface 2a and the inclined surface 2b are opposite to those of the orthogonal surface 1a and the inclined surface 1b of the bottom surface of the recess 1d of the case l.
そして回転板２はケース１のオイル４を充填した凹部１
ｄに嵌合され、回転板の下面に突き出した回転軸２Ｃの
不図示の下端面がケースｌの受は軸１ｃの上端面に接し
て回転自在に支持される。The rotating plate 2 has a recess 1 filled with oil 4 in the case 1.
The lower end surface (not shown) of the rotary shaft 2C, which is fitted into the case 1 and protrudes from the lower surface of the rotary plate, is rotatably supported by the receiver of the case 1 in contact with the upper end surface of the shaft 1c.
ケース１の凹部１ｄ内の凹凸と回転板２の下面の凹凸と
は、所定の間隔をもって対向して配置される。The unevenness in the recessed portion 1d of the case 1 and the unevenness on the lower surface of the rotating plate 2 are arranged to face each other with a predetermined interval.
次にキャップ３はオイル４のシールと回転板２の保持を
行なうものである。キャップ３は直径がケース１の凹部
１ｄにほぼ等しい円盤状に形成されており、その中心に
は回転板２の回転軸２Ｃを通すための穴３ａが形成され
ている。そしてキャップ３は穴３ａに回転軸２Ｃを通し
て回転板２の上から第２図に示すようにケース１の凹部
１ｄに嵌合され固定される。Next, the cap 3 seals the oil 4 and holds the rotating plate 2. The cap 3 is formed into a disk shape with a diameter approximately equal to the recess 1d of the case 1, and a hole 3a through which the rotation shaft 2C of the rotary plate 2 passes is formed in the center. Then, the cap 3 is inserted into the hole 3a through the rotation shaft 2C, and is fitted and fixed into the recess 1d of the case 1 from above the rotation plate 2, as shown in FIG.
以上の各部材から成るダンパーは不図示の伝動機構にケ
ース１を固定して取り付けられ、伝動機構においてダン
パー作用を受けるべき回転力が回転軸２Ｃを介して回転
板２に加えられる。そして回転板２の回転に対するオイ
ル４の抵抗によって回転軸２Ｃに加えられた回転力が弱
められダンパー作用が果されるようになっている。The damper made up of the above-mentioned members is fixedly attached to the case 1 to a transmission mechanism (not shown), and the rotational force to be subjected to the damper action is applied to the rotary plate 2 via the rotation shaft 2C in the transmission mechanism. The resistance of the oil 4 to the rotation of the rotary plate 2 weakens the rotational force applied to the rotary shaft 2C, so that a damper effect is achieved.
ここで本実施例では、第３図及び第４図に示すようにケ
ース１と回転板２のオイル４に接する面に前述の直交面
１ａと傾斜面１ｂないし２ａ。In this embodiment, as shown in FIGS. 3 and 4, the surfaces of the case 1 and the rotating plate 2 that are in contact with the oil 4 have the above-mentioned orthogonal surface 1a and the inclined surfaces 1b to 2a.
２ｂから成る凹凸が設けられているので、回転板２の回
転方向Ａ、Ｈによってオイル４の抵抗りの大きさが異な
ってくる。2b, the resistance of the oil 4 varies depending on the rotation directions A and H of the rotary plate 2.
すなわち第３図に示すように回転板２の回転方向がＡ方
向の場合にはオイル４は回転板２の傾斜面２ｂによって
押しのけられ傾斜面２ｂ及びｉｂに沿ってスムーズに流
れるので抵抗りは比較的小さくなる。In other words, as shown in Fig. 3, when the rotating direction of the rotating plate 2 is in the A direction, the oil 4 is pushed away by the inclined surface 2b of the rotating plate 2 and flows smoothly along the inclined surfaces 2b and ib, so the resistance is comparatively low. The target becomes smaller.
これに対して第４図に示すように回転方向がＢ方向の場
合には、直交面２ｂによってオイル４が押しのけられ、
オイル４は直交面２ａ及びｌａに当たるようにして流れ
る。従ってこの場合はオイル４が流れに〈〈抵抗りが第
３図の場合に比べて大幅に大きくなる。On the other hand, when the rotation direction is in the B direction as shown in FIG. 4, the oil 4 is pushed away by the orthogonal surface 2b,
Oil 4 flows so as to hit orthogonal surfaces 2a and la. Therefore, in this case, the resistance of the oil 4 to flow is significantly greater than in the case of FIG. 3.
このように本実施例によれば回転方向がＡ方向の場合に
はオイルの抵抗りが小さくダンパー作用が小さい、又回
転方向がＢ方向の場合抵抗りが大幅に犬きくダンパー作
用が強くなる０回転方向によってダンパー作用の強さを
変化させることができる。従って回転方向によってダン
パー作用の強さを変えることが必要な伝動機構に極めて
好適に用いることができる。According to this embodiment, when the rotation direction is in the A direction, the oil resistance is small and the damper action is small, and when the rotation direction is in the B direction, the resistance is significantly increased and the damper action is strong. The strength of the damper action can be changed depending on the direction of rotation. Therefore, it can be very suitably used in a transmission mechanism that requires changing the strength of the damper action depending on the direction of rotation.
なお以上の実施例では回転板２とケース１の両方につい
てオイル４に接する面に凹凸を設けたが、いずれか一方
のみに凹凸を設けることによって回転方向によりオイル
４の抵抗の大きさを異ならせることも考えられる。In the above embodiments, both the rotary plate 2 and the case 1 are provided with unevenness on the surfaces in contact with the oil 4, but by providing unevenness on only one of them, the magnitude of the resistance of the oil 4 can be varied depending on the direction of rotation. It is also possible.
また凹凸の形状は実施例のものに限定されないのは勿論
であり、要は回転方向によりオイル４の抵抗の大きさを
異ならせるような断面形状であれば良い。Moreover, the shape of the unevenness is of course not limited to that of the embodiment, and any cross-sectional shape may be used as long as it allows the resistance of the oil 4 to vary depending on the direction of rotation.
さらにはグリスなどのオイル４の代りに他の適当な流体
を用いることも考えられる。Furthermore, it is also conceivable to use other suitable fluids, such as grease, in place of the oil 4.
［発明の効果］
以との説明から明らかなように、本発明によれば、流体
を充填したケース内に回転体を回転自在に嵌合して構成
され、前記回転体に加えられる回転力を前記流体の抵抗
により弱めるロータリー流体ダンパーにおいて、前記流
体の抵抗の大きさを前記回転体の回転方向によって異な
らせるように前記回転体および／またはケースの前記流
体に接する面の断面形状を構成したので、回転体の回転
力を弱めるダンパー作用の強さを回転体の回転方向によ
って異ならせることができるという従来のロータリー流
体ダンパーになかった機能を果すことができるという優
れた効果が得られる。[Effects of the Invention] As is clear from the description below, according to the present invention, a rotating body is rotatably fitted into a case filled with fluid, and the rotational force applied to the rotating body is absorbed. In the rotary fluid damper that is weakened by the resistance of the fluid, the cross-sectional shape of the surface of the rotating body and/or the case in contact with the fluid is configured so that the magnitude of the fluid resistance varies depending on the rotational direction of the rotating body. This provides an excellent effect in that the strength of the damper action that weakens the rotational force of the rotating body can be varied depending on the rotational direction of the rotating body, which is a function not available in conventional rotary fluid dampers.
第１図は本発明の実施例によるロータリーオイルダンパ
ーの構造を示す分解斜視図、第２図は同ダンパーの組み
立てた状態の斜視図、第３図及び第４図はそれぞれ同ダ
ンパーの作用の説明図である。
１・・・ケース ２・・・回転板３・・・キ
ャップ ４・・・オイルＬａ、２ａ・・・直交
面 １ｂ、２ｂ・・・傾斜面ダ’ｉｌ’ｅ−の分解余
４視図
第１図FIG. 1 is an exploded perspective view showing the structure of a rotary oil damper according to an embodiment of the present invention, FIG. 2 is a perspective view of the damper in an assembled state, and FIGS. 3 and 4 are explanations of the function of the damper, respectively. It is a diagram. 1... Case 2... Rotating plate 3... Cap 4... Oil La, 2a... Orthogonal surface 1b, 2b... Inclined surface Da'il'e- exploded remainder 4th perspective view Figure 1
Claims (1)
して構成され、前記回転体に加えられる回転力を前記流
体の抵抗により弱めるロータリー流体ダンパーにおいて
、前記流体の抵抗の大きさを前記回転体の回転方向によ
って異ならせるように前記回転体および／またはケース
の前記流体に接する面の断面形状を構成したことを特徴
とするロータリー流体ダンパー。 ２）前記回転体の回転方向に対してほぼ直交する面と傾
斜した面からなる凹凸を前記回転体および／またはケー
スの前記流体に接する面に設けたことを特徴とする特許
請求の範囲第１項に記載のロータリー流体ダンパー。[Scope of Claims] 1) A rotary fluid damper configured by rotatably fitting a rotating body into a case filled with fluid, and weakening the rotational force applied to the rotating body by the resistance of the fluid. A rotary fluid damper, characterized in that the cross-sectional shape of the surface of the rotating body and/or the case that comes into contact with the fluid is configured such that the magnitude of the resistance varies depending on the direction of rotation of the rotating body. 2) The first aspect of the present invention is characterized in that a surface of the rotating body and/or the case that is in contact with the fluid is provided with an uneven surface that is made up of a surface that is substantially orthogonal to the rotational direction of the rotating body and a surface that is inclined. Rotary fluid damper as described in Section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62060009A JP2504985B2 (en) | 1987-03-17 | 1987-03-17 | Rotary fluid damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62060009A JP2504985B2 (en) | 1987-03-17 | 1987-03-17 | Rotary fluid damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63231029A true JPS63231029A (en) | 1988-09-27 |
| JP2504985B2 JP2504985B2 (en) | 1996-06-05 |
Family
ID=13129648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62060009A Expired - Lifetime JP2504985B2 (en) | 1987-03-17 | 1987-03-17 | Rotary fluid damper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2504985B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0271134U (en) * | 1988-11-19 | 1990-05-30 | ||
| US6085384A (en) * | 1999-04-08 | 2000-07-11 | Illinois Tool Works Inc. | One-way hinge damper |
| US6196589B1 (en) * | 1997-10-14 | 2001-03-06 | Breed Automotive Technology, Inc. | Load limiting device for a seat belt |
| EP1233206A2 (en) * | 2001-02-14 | 2002-08-21 | Oiles Corporation | Damper and automobile seat having the damper |
| DE10235550A1 (en) * | 2002-08-03 | 2004-02-19 | Suspa Holding Gmbh | Rotational damper, in particular, for damping the rotation of a belt shaft in a safety belt coiler comprises a screw element which is firmly attached to the damper shaft in the damper housing |
| EP1413794A2 (en) * | 2002-10-15 | 2004-04-28 | Illinois Tool Works Inc. | A direction-dependent, ultrasonically-welded hinge damper |
| US7243398B2 (en) | 2002-08-09 | 2007-07-17 | Arturo Salice S.P.A. | Pivot-action damper |
| WO2007102111A3 (en) * | 2006-03-09 | 2008-01-24 | Antonino Cultraro | A device for braking the movement of a movable member with respect to a support structure |
| US7917995B2 (en) * | 2005-12-15 | 2011-04-05 | Arturo Salice S.P.A. | Furniture hinge |
| KR101146073B1 (en) | 2009-04-22 | 2012-05-14 | 가부시키가이샤 니프코 | Rotary damper |
| CN102840263A (en) * | 2011-06-21 | 2012-12-26 | 株式会社利富高 | Rotary damper |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6237640U (en) * | 1985-08-26 | 1987-03-05 | ||
| JPS62106038U (en) * | 1985-12-24 | 1987-07-07 |
-
1987
- 1987-03-17 JP JP62060009A patent/JP2504985B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6237640U (en) * | 1985-08-26 | 1987-03-05 | ||
| JPS62106038U (en) * | 1985-12-24 | 1987-07-07 |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0271134U (en) * | 1988-11-19 | 1990-05-30 | ||
| US6196589B1 (en) * | 1997-10-14 | 2001-03-06 | Breed Automotive Technology, Inc. | Load limiting device for a seat belt |
| US6085384A (en) * | 1999-04-08 | 2000-07-11 | Illinois Tool Works Inc. | One-way hinge damper |
| US7357230B2 (en) | 2001-02-14 | 2008-04-15 | Oiles Corporation | Damper and automobile seat having the damper |
| EP1233206A2 (en) * | 2001-02-14 | 2002-08-21 | Oiles Corporation | Damper and automobile seat having the damper |
| EP1233206A3 (en) * | 2001-02-14 | 2004-04-07 | Oiles Corporation | Damper and automobile seat having the damper |
| US7866451B2 (en) | 2001-02-14 | 2011-01-11 | Oiles Corporation | Damper and automobile seat having the damper |
| DE10235550A1 (en) * | 2002-08-03 | 2004-02-19 | Suspa Holding Gmbh | Rotational damper, in particular, for damping the rotation of a belt shaft in a safety belt coiler comprises a screw element which is firmly attached to the damper shaft in the damper housing |
| US7243398B2 (en) | 2002-08-09 | 2007-07-17 | Arturo Salice S.P.A. | Pivot-action damper |
| US7051618B2 (en) | 2002-10-15 | 2006-05-30 | Illnois Tool Works Inc | Ultrasonic welded hinge damper |
| EP1413794A3 (en) * | 2002-10-15 | 2004-11-10 | Illinois Tool Works Inc. | A direction-dependent, ultrasonically-welded hinge damper |
| EP1413794A2 (en) * | 2002-10-15 | 2004-04-28 | Illinois Tool Works Inc. | A direction-dependent, ultrasonically-welded hinge damper |
| US7917995B2 (en) * | 2005-12-15 | 2011-04-05 | Arturo Salice S.P.A. | Furniture hinge |
| WO2007102111A3 (en) * | 2006-03-09 | 2008-01-24 | Antonino Cultraro | A device for braking the movement of a movable member with respect to a support structure |
| US8695767B2 (en) | 2006-03-09 | 2014-04-15 | Antonino Cultraro | Device for braking the movement of a movable member with respect to a support structure |
| KR101146073B1 (en) | 2009-04-22 | 2012-05-14 | 가부시키가이샤 니프코 | Rotary damper |
| CN102840263A (en) * | 2011-06-21 | 2012-12-26 | 株式会社利富高 | Rotary damper |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2504985B2 (en) | 1996-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |