JP2000120747A - Rotary damper - Google Patents

Rotary damper

Info

Publication number
JP2000120747A
JP2000120747A JP10286364A JP28636498A JP2000120747A JP 2000120747 A JP2000120747 A JP 2000120747A JP 10286364 A JP10286364 A JP 10286364A JP 28636498 A JP28636498 A JP 28636498A JP 2000120747 A JP2000120747 A JP 2000120747A
Authority
JP
Japan
Prior art keywords
vane
braking force
cover
vane member
casing
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
Application number
JP10286364A
Other languages
Japanese (ja)
Other versions
JP4101948B2 (en
Inventor
Shinkichi Kanaga
信吉 賀長
Ryota Shimura
良太 志村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Seiki Co Ltd
Fuji Seiki KK
Original Assignee
Fuji Seiki Co Ltd
Fuji Seiki KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Seiki Co Ltd, Fuji Seiki KK filed Critical Fuji Seiki Co Ltd
Priority to JP28636498A priority Critical patent/JP4101948B2/en
Publication of JP2000120747A publication Critical patent/JP2000120747A/en
Application granted granted Critical
Publication of JP4101948B2 publication Critical patent/JP4101948B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a rotary damper which can delay rotational action by certainly exhibiting braking force in the case that closing action is performed after a rotating cover is slightly opened. SOLUTION: A spring member 7 is arranged between a vane member 4 having a notch 4d in its end surface 4c and a vane cover 5 formed into an approximately L-shaped flat surface having a circular arc part 52 and a radial part 51 and covering at least the end surface 4c of the vane member 4. Thereby, the radial part 51 of the vane cover 5 arranged along a side surface 4e on the braking force exhibiting direction side of the vane member 4 is energized in a direction that it is tightly stuck to the side surface 4e on the braking force exhibiting direction side of the vane member 4 so as to be tightly stuck thereto, and when a rotary shaft 3 is rotated in a braking force non-exhibiting direction (counterclockwise direction in figure), the spring member 7 is deformed by pressure of viscous liquid 8 in the inside of a liquid chamber 22, and the radial part 51 of the vane cover 5 is separated from the side surface 4e on the braking force exhibiting direction side of the vane member 4.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、回転することにより開
閉動作する回転蓋や回転扉等の回転動作を遅動させるロ
ータリーダンパに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary damper for delaying the rotation of a rotating lid or a door which is opened and closed by rotating.

【0002】[0002]

【従来の技術】従来、回転することにより開閉動作する
回転蓋や回転扉等の回転動作を遅動させるロータリーダ
ンパとして、例えば、図12に示すように、隔壁部10
1を備えたケーシング102と、該ケーシング102の
軸方向中心に沿って配設される回転軸103と、該回転
軸103の外周面に突設され、粘性液体104が充填さ
れる液体室105内で該回転軸103と共に回動すると
共に、先端面106aに切欠107を有するベーン部材
106と、該ベーン部材106の先端面106aを被覆
する円弧部108aと該円弧部108aの両側から半径
方向に沿って突出する半径部108b,108cとを有
して形成されると共に、該各半径部108b,108c
のうちの一方の半径部108bに切欠109を有するベ
ーンカバー108とを備えて構成されるロータリーダン
パ100がある。
2. Description of the Related Art Conventionally, as a rotary damper for delaying a rotation operation of a rotating lid or a rotating door which opens and closes by rotating, for example, as shown in FIG.
1, a rotating shaft 103 disposed along the axial center of the casing 102, and a liquid chamber 105 protruding from the outer peripheral surface of the rotating shaft 103 and filled with a viscous liquid 104. And a vane member 106 having a notch 107 in a front end surface 106a, an arc portion 108a covering the front end surface 106a of the vane member 106, and radially extending from both sides of the arc portion 108a. Radii 108b, 108c, and each of the radii 108b, 108c
The rotary damper 100 includes a vane cover 108 having a notch 109 in one of the radial portions 108b.

【0003】上記のロータリーダンパ100は、回転軸
103が回転蓋等の軸体に連結されて使用され、回転蓋
等が開放動作する場合には、その開放動作に伴って、回
転蓋等の軸体及びこれに連結された回転軸103とベー
ン部材106が非制動力発揮方向(図上、反時計回り方
向)に回転する。これにより、ベーンカバー108がそ
の際に生じる粘性液体104の圧力により移動して、ベ
ーンカバー108の一方の半径部108bがベーン部材
106に当接し、ベーン部材106の先端面106aに
形成された切欠107と、ベーンカバー108の一方の
端部108bに形成された切欠109と、ベーンカバー
108の他方の半径部108c及びベーン部材106と
の間の間隙とにより粘性液体104が通過可能な還流路
が形成される。そして、液体室105内の粘性液体10
4は、ケーシング102の底壁内面等に形成されたオリ
フィス溝(図示せず)を通過すると共に、この還流路を
通過して流動するので、その際に生じる粘性抵抗が小さ
くなり、それにより、ロータリダンパ100が発揮する
制動力も小さくなる。その結果、回転蓋等を、該回転蓋
等の自重に相当する力程度で開放させることができる。
The rotary damper 100 is used with a rotating shaft 103 connected to a shaft such as a rotating lid. When the rotating lid or the like is opened, the opening of the rotating lid or the like is accompanied by the opening operation. The body, the rotating shaft 103 connected thereto, and the vane member 106 rotate in the non-braking force exerting direction (counterclockwise in the figure). As a result, the vane cover 108 moves due to the pressure of the viscous liquid 104 generated at that time, and one radius portion 108b of the vane cover 108 comes into contact with the vane member 106, and the notch formed in the tip end surface 106a of the vane member 106 107, a notch 109 formed at one end 108b of the vane cover 108, and a gap between the other radial portion 108c of the vane cover 108 and the vane member 106 form a return passage through which the viscous liquid 104 can pass. It is formed. Then, the viscous liquid 10 in the liquid chamber 105
4 flows through an orifice groove (not shown) formed in the inner surface of the bottom wall of the casing 102 and the like, and flows through the return path, so that the viscous resistance generated at that time becomes small, and The braking force exerted by the rotary damper 100 also decreases. As a result, the rotating lid or the like can be opened with a force corresponding to the weight of the rotating lid or the like.

【0004】他方、回転蓋等が閉成動作する場合には、
その閉成動作に伴って、回転蓋等の軸体及びこれに連結
された回転軸103とベーン部材106が制動力発揮方
向(図上、時計回り方向)に回転する。これにより、ま
ず、他方の半径部108cにベーン部材106が当接
し、ベーン部材106とベーンカバー108との間に形
成された還流路が遮断される。粘性液体104は、ケー
シング102の底壁内面等に形成されたオリフィス溝の
みを通過して流動する。この結果、粘性液体104の流
動が制限され、粘性液体104がオリフィス溝を通過す
る際の抵抗によりロータリーダンパ100は大きな制動
力を発揮して、それにより、回転蓋等の回転動作を遅動
させることができる。
On the other hand, when the rotating lid or the like performs a closing operation,
Along with the closing operation, the shaft body such as the rotating lid and the rotating shaft 103 and the vane member 106 connected thereto rotate in the braking force exerting direction (clockwise in the drawing). Accordingly, first, the vane member 106 abuts on the other radius portion 108c, and the recirculation path formed between the vane member 106 and the vane cover 108 is shut off. The viscous liquid 104 flows only through an orifice groove formed in the inner surface of the bottom wall of the casing 102 or the like. As a result, the flow of the viscous liquid 104 is restricted, and the resistance when the viscous liquid 104 passes through the orifice groove causes the rotary damper 100 to exert a large braking force, thereby delaying the rotation of the rotary lid and the like. be able to.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、上記の
ロータリーダンパでは、非制動力発揮方向における粘性
液体の還流路を確保するため、ベーンカバーとベーン部
材との間に遊びが設けられている。従って、非制動力発
揮方向に回転させた場合には、上記したように、ベーン
部材106がベーンカバー108の他方の半径部108
cに当接するまでは制動力は発揮されない。このため、
回転蓋等を僅かに開放動作させた後、閉成動作させた場
合には、制動力が付与されることなく回転蓋等が閉成動
作してしまい、回転蓋等が該回転蓋等の支持枠に勢いよ
く衝突して破損する等の不具合が生じていた。
However, in the above-mentioned rotary damper, a play is provided between the vane cover and the vane member in order to secure a return path for the viscous liquid in the direction of exerting no braking force. Accordingly, when the vane member 106 is rotated in the non-braking force exerting direction, as described above, the vane member 106 is
No braking force is exerted until it comes into contact with c. For this reason,
When the closing operation is performed after slightly opening the rotating lid or the like, the rotating lid or the like closes without applying a braking force, and the rotating lid or the like supports the rotating lid or the like. Problems such as damage due to violent collision with the frame have occurred.

【0006】かかる不具合を解消するため、ベーンカバ
ーとベーン部材との間の遊びをできるだけ小さくするこ
とも考えられるが、この場合には、ベーン部材とベーン
カバーとの間に形成される還流路が狭くなるため、非制
動力発揮方向に回転する際における粘性液体の流動が制
限され、回転蓋等を開放させる場合には、回転蓋等の自
重を超える大きな力が必要となる。
In order to solve such a problem, it is conceivable to reduce the play between the vane cover and the vane member as much as possible. In this case, however, a return path formed between the vane member and the vane cover is formed. Because of the narrowing, the flow of the viscous liquid during rotation in the non-braking force exerting direction is restricted, and when the rotating lid or the like is opened, a large force exceeding the weight of the rotating lid or the like is required.

【0007】そこで、本発明は、回転蓋等を開放させる
際に必要な力が大きくなり過ぎることがなく、回転蓋等
を僅かに開放動作させた後、閉成動作させた場合に、確
実に制動力を発揮して、回転蓋等の回転動作を遅動させ
ることができるロータリーダンパを提供することを課題
とする。
Therefore, the present invention ensures that the force required to open the rotary lid or the like does not become too large, and that the rotary lid or the like is slightly opened and then closed. It is an object of the present invention to provide a rotary damper that can exert a braking force to delay the rotation of a rotary lid or the like.

【0008】[0008]

【課題を解決するための手段】上記課題を解決するた
め、請求項1記載の本発明のロータリーダンパは、内周
面から軸方向中心に向かって突出する隔壁部を備えた有
底略円筒状のケーシングと、該ケーシングの軸方向中心
に沿って配設される回転軸と、該回転軸の外周面に突設
され、前記ケーシング内に形成された粘性液体が充填さ
れる液体室内で該回転軸と共に回動すると共に、先端面
に切欠を有するベーン部材と、軸方向の長さが該ベーン
部材とほぼ同じであると共に、円弧部と半径部とを有す
る平面略L字状に形成され、少なくとも該ベーン部材の
先端面を被覆するベーンカバーと、前記ケーシングの上
面開口部を閉塞する蓋部材とを有し、さらに、前記ベー
ン部材とベーンカバーとの間に設けられ、常態において
は、該ベーン部材の制動力発揮方向側の側面に沿って設
けられる該ベーンカバーの半径部を、該ベーン部材の制
動力発揮方向側の側面に密着させる方向に付勢し、前記
回転軸が非制動力発揮方向に回転する場合には、前記粘
性液体の圧力により変形して、該ベーンカバーの半径部
を該ベーン部材の制動力発揮方向側の側面から離間させ
るバネ部材が設けられていることを特徴とする。請求項
2記載の本発明のロータリーダンパは、請求項1記載の
ロータリーダンパであって、前記バネ部材が、前記ベー
ン部材の先端面に形成された切欠に嵌合可能な平面略コ
字状の嵌合部と、該嵌合部の上端付近及び下端付近にお
ける一方の角部から各々外方に延びる舌片とを有するこ
とを特徴とする。請求項3記載の本発明のロータリーダ
ンパは、内周面から軸方向中心に向かって突出する隔壁
部を備えた有底略円筒状のケーシングと、該ケーシング
の軸方向中心に沿って配設される回転軸と、該回転軸の
外周面に突設され、前記ケーシング内に形成された粘性
液体が充填される液体室内で該回転軸と共に回動すると
共に、先端面に切欠を有するベーン部材と、平面略U字
状に形成され、該ベーン部材の両側面に沿って内面が密
着して設けられる半径部を有すると共に、該各半径部の
うちの制動力発揮方向側の半径部に該粘性液体が通過可
能な還流用の液体通過孔を有し、軸方向の長さが該ベー
ン部材とほぼ同じで、少なくとも該ベーン部材の先端面
を被覆するベーンカバーと、前記ケーシングの上面開口
部を閉塞する蓋部材とを有し、さらに、前記ベーンカバ
ーの制動力発揮方向側の半径部に設けられ、常態におい
ては、該ベーンカバーの液体通過孔を閉口させ、前記回
転軸が非制動力発揮方向に回転する場合には、前記粘性
液体の圧力により変形して、該ベーンカバーの液体通過
孔を開口させるバネ部材が設けられていることを特徴と
する。請求項4記載の本発明のロータリーダンパは、請
求項3記載のロータリーダンパであって、前記バネ部材
が、基端部から突出する三つの片部を有して形成され、
このうちの両側に形成される各片部が中央に形成される
平板状の片部に対して、側面からみて上方に位置するよ
う曲げ加工されていることを特徴とする。請求項5記載
の本発明のロータリーダンパは、請求項1〜4のいずれ
か1項記載のロータリーダンパであって、前記蓋部材の
内側に、裏面に前記粘性液体が通過する円弧状のオリフ
ィス溝を有する交換可能なスペーサ板が設けられている
ことを特徴とする。
According to a first aspect of the present invention, there is provided a rotary damper having a bottomed substantially cylindrical shape having a partition part protruding from an inner peripheral surface toward an axial center. A rotating shaft disposed along the axial center of the casing; and a rotating chamber protruding from an outer peripheral surface of the rotating shaft, wherein the rotating chamber is filled with a viscous liquid formed in the casing. While rotating with the shaft, a vane member having a notch in the tip end surface, the length in the axial direction is substantially the same as the vane member, and is formed in a substantially L-shaped plane having an arc portion and a radius portion, A vane cover that covers at least a tip surface of the vane member, and a lid member that closes an upper surface opening of the casing, is further provided between the vane member and the vane cover. Vane material The radial portion of the vane cover provided along the side surface on the power exerting direction side is urged in a direction in which the radius portion of the vane cover is brought into close contact with the side surface on the braking force exerting direction side of the vane member, and the rotating shaft rotates in the non-braking force exerting direction. In this case, there is provided a spring member which is deformed by the pressure of the viscous liquid and separates the radius of the vane cover from the side surface of the vane member on the braking force exerting direction side. A rotary damper according to a second aspect of the present invention is the rotary damper according to the first aspect, wherein the spring member has a substantially U-shaped planar shape that can be fitted into a notch formed in a tip end surface of the vane member. It is characterized by having a fitting portion and tongue pieces extending outward from one corner near the upper end and near the lower end of the fitting portion. A rotary damper according to a third aspect of the present invention is provided with a bottomed substantially cylindrical casing having a partition part protruding from the inner peripheral surface toward the axial center, and disposed along the axial center of the casing. A rotating shaft, a vane member protruding from an outer peripheral surface of the rotating shaft, rotating together with the rotating shaft in a liquid chamber formed in the casing and filled with a viscous liquid, and having a notch at a tip end surface; The vane member is formed in a substantially U-shape, and has a radius portion whose inner surface is provided in close contact with both side surfaces of the vane member. A vane cover having a liquid passage hole for reflux through which a liquid can pass, having an axial length substantially equal to that of the vane member, and covering at least a tip end surface of the vane member; and a top opening of the casing. And a lid member for closing. Provided in a radius portion of the vane cover on the side where the braking force is exerted, and in a normal state, the liquid passage hole of the vane cover is closed, and when the rotating shaft rotates in the direction where the non-braking force is exerted, the viscosity is reduced. A spring member that is deformed by the pressure of the liquid and opens a liquid passage hole of the vane cover is provided. A rotary damper according to a fourth aspect of the present invention is the rotary damper according to the third aspect, wherein the spring member is formed to have three pieces protruding from a base end,
Among these, each piece formed on both sides is bent with respect to a plate-shaped piece formed in the center so as to be located above when viewed from the side. A rotary damper according to a fifth aspect of the present invention is the rotary damper according to any one of the first to fourth aspects, wherein the viscous liquid passes through a back surface inside the lid member. A replaceable spacer plate having the following is provided.

【0009】[0009]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて詳細に説明する。図1は本発明の第一の実施
の形態に係るロータリーダンパ1を示す横断面図であ
り、図2はロータリーダンパ1の縦断面図である。これ
らの図に示すように、ロータリーダンパ1は、ケーシン
グ2、回転軸3、ベーン部材4、ベーンカバー5、蓋部
材6及びバネ部材7を有して構成されている。
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a transverse sectional view showing a rotary damper 1 according to a first embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the rotary damper 1. As shown in these drawings, the rotary damper 1 includes a casing 2, a rotating shaft 3, a vane member 4, a vane cover 5, a lid member 6, and a spring member 7.

【0010】ケーシング2は、上面開口の有底略円筒状
に形成され、その内周面2aには、ケーシング2の軸方
向中心に向かって突出する平面視で略扇形の隔壁部21
が形成されている。ケーシング2の軸方向中心寄りに位
置する隔壁部21の先端面21aは、回転軸3の外周面
と摺接するよう略円弧状に形成されている。この隔壁部
21を境としてケーシング2内に液体室22が形成さ
れ、この液体室22内に、グリス等の粘性液体8が充填
される。また、ケーシング2の上面開口部2bには、回
転軸3を挿通可能な蓋部材6が配設される。
The casing 2 is formed in a substantially cylindrical shape with a top opening and a bottom. An inner peripheral surface 2a of the casing 2 has a substantially fan-shaped partition wall 21 projecting toward the center of the casing 2 in the axial direction.
Are formed. The distal end surface 21 a of the partition 21 located near the center in the axial direction of the casing 2 is formed in a substantially arc shape so as to be in sliding contact with the outer peripheral surface of the rotating shaft 3. A liquid chamber 22 is formed in the casing 2 with the partition 21 as a boundary, and the liquid chamber 22 is filled with a viscous liquid 8 such as grease. In addition, a lid member 6 through which the rotating shaft 3 can be inserted is provided in the upper opening 2b of the casing 2.

【0011】蓋部材6は、略円盤状で、略中央に回転軸
挿通孔61aが貫通形成された蓋本体61と、同じく略
円盤状で、略中央に回転軸挿通孔62aが貫通形成され
たガイド板62を有して構成される。蓋本体61とガイ
ド板62は、蓋本体61が表側に、ガイド板62が裏側
に配設され、該ガイド板62の裏面62bはスペーサ板
9の表面9aに接している。
The lid member 6 is substantially disk-shaped, and has a substantially disk-shaped cover body 61 having a rotary shaft insertion hole 61a formed at a substantially central portion thereof. It has a guide plate 62. The lid main body 61 and the guide plate 62 are disposed such that the lid main body 61 is disposed on the front side and the guide plate 62 is disposed on the rear side, and the back surface 62 b of the guide plate 62 is in contact with the front surface 9 a of the spacer plate 9.

【0012】スペーサ板9は、蓋部材6の内側に、裏面
9bがケーシング2の隔壁部21の上端面及びベーン部
材4の上端面に接するように配設される。また、スペー
サ板9の裏面9bには、図3に示すように、円弧状に刻
設された溝からなるオリフィス溝91が設けられてお
り、ロータリダンパ1は、このオリフィス溝91を粘性
液体8が通過する際の抵抗により、所定の制動力を発揮
することがことができる。なお、本実施の形態のよう
に、オリフィス溝91の幅を、回転軸3及びベーン部材
4の制動力発揮方向に向かって次第に小さくなるように
形成すれば、ベーン部材4が制動力発揮方向に回転する
に従って、より大きな制動力を働かせることができる。
また、オリフィス溝91が種々の形状に形成された複数
のスペーサ板9を準備しておけば、回転蓋等の可動側の
トルク変化に合わせてロータリーダンパ1の制動特性を
変更したい場合には、このスペーサ板9のみを交換する
だけで対応が可能となる。
The spacer plate 9 is disposed inside the lid member 6 such that the back surface 9b is in contact with the upper end surface of the partition 21 of the casing 2 and the upper end surface of the vane member 4. As shown in FIG. 3, the back surface 9b of the spacer plate 9 is provided with an orifice groove 91 formed of a groove formed in an arc shape. A predetermined braking force can be exerted by the resistance when the vehicle passes. If the width of the orifice groove 91 is gradually reduced toward the direction in which the braking force is exerted on the rotary shaft 3 and the vane member 4 as in the present embodiment, the vane member 4 is moved in the direction in which the braking force is exerted. As it rotates, greater braking force can be exerted.
In addition, if a plurality of spacer plates 9 having orifice grooves 91 formed in various shapes are prepared, if it is desired to change the braking characteristic of the rotary damper 1 in accordance with a change in torque on the movable side of the rotary lid or the like, It is possible to cope only by replacing the spacer plate 9 alone.

【0013】なお、本実施の形態では、スペーサ板9の
裏面9bにオリフィス溝91を設けているが、スペーサ
板9を配設しない場合には、ケーシング2の底壁内面、
又はガイド板62の裏面62bにオリフィス溝を形成し
てもよく、さらに、蓋部材6を蓋本体61のみから構成
し、ガイド板62を配設しない場合には、蓋本体61の
裏面にオリフィス溝を形成してもよい。
In the present embodiment, the orifice groove 91 is provided on the back surface 9b of the spacer plate 9. However, when the spacer plate 9 is not provided, the inner surface of the bottom wall of the casing 2,
Alternatively, an orifice groove may be formed on the back surface 62b of the guide plate 62. Further, when the cover member 6 is formed only of the cover body 61 and the guide plate 62 is not provided, the orifice groove is formed on the back surface of the cover body 61. May be formed.

【0014】回転軸3は、略円柱状に形成され、一端3
1が蓋部材6を構成する蓋本体61とガイド板62に形
成された回転軸挿通孔61a,62a、及びスペーサ板
9の略中央に形成された回転軸挿通孔9cに挿通され、
他端32がケーシング2の底壁内面の略中央に形成され
た溝23に嵌入され、ケーシング2の軸方向中心に沿っ
て配設されている。回転軸3の外周面には、図1及び図
4に示すように、回転軸3において相対峙する位置にベ
ーン部材4が突設されており、このベーン部材4は、回
転軸3と一体に成形されている。
The rotating shaft 3 is formed in a substantially cylindrical shape, and has one end 3.
1 is inserted through rotary shaft insertion holes 61a and 62a formed in a lid body 61 and a guide plate 62 constituting the lid member 6, and a rotary shaft insertion hole 9c formed substantially in the center of the spacer plate 9,
The other end 32 is fitted into a groove 23 formed substantially at the center of the inner surface of the bottom wall of the casing 2, and is disposed along the axial center of the casing 2. As shown in FIGS. 1 and 4, a vane member 4 is projected from an outer peripheral surface of the rotating shaft 3 at a position facing the rotating shaft 3, and the vane member 4 is integrally formed with the rotating shaft 3. Is molded.

【0015】ベーン部材4は、上記したように回転軸3
の外周面に突設され、液体室22内に位置するように配
設されている。このベーン部材4は、略四角形の平板状
に形成され、軸方向に沿った長さが、回動した際に上端
面4aがスペーサ板9の裏面9bに摺接し、下端面4b
がケーシング2の底壁内面に摺接する程度の長さを有す
る。また、半径方向に沿った長さは、ケーシング2の内
周面2aから回転軸3の外周面までの半径方向に沿った
距離よりも短く形成されている。また、先端面4cに
は、側面略コ字状の切欠4dが形成されている。
As described above, the vane member 4 is
And is disposed so as to be located in the liquid chamber 22. The vane member 4 is formed in a substantially rectangular flat plate shape, and its length along the axial direction is such that when rotated, the upper end surface 4a slides on the back surface 9b of the spacer plate 9 and the lower end surface 4b
Has a length enough to slide on the inner surface of the bottom wall of the casing 2. The length in the radial direction is shorter than the distance from the inner peripheral surface 2a of the casing 2 to the outer peripheral surface of the rotating shaft 3 in the radial direction. Further, a notch 4d having a substantially U-shaped side surface is formed in the tip end surface 4c.

【0016】ベーンカバー5は、図1及び図5に示すよ
うに、軸方向の長さがベーン部材4とほぼ同じであると
共に、円弧部52と半径部51とを有する平面略L字状
に形成され、少なくともベーン部材4の先端面4cを被
覆するように配設されている。具体的には、ベーンカバ
ー5は、円弧部52が、ケーシング2の内周面2aとベ
ーン部材4の先端面4cとの間に設けられ、半径部51
が、該円弧部52の一方の側面から半径方向に沿って突
出して形成されている。そして、常態においては、円弧
部52がケーシング2の内周面2aに接しつつベーン部
材4の先端面4cを被覆する一方、半径部51がその内
面をベーン部材4の制動力発揮方向側の側面4eに密着
させて配設されている。
As shown in FIGS. 1 and 5, the vane cover 5 has substantially the same axial length as the vane member 4 and has a substantially L-shaped plane having an arc portion 52 and a radius portion 51. It is formed and disposed so as to cover at least the tip end surface 4c of the vane member 4. Specifically, in the vane cover 5, the arc portion 52 is provided between the inner peripheral surface 2 a of the casing 2 and the tip end surface 4 c of the vane member 4, and the radius portion 51 is provided.
Are formed to protrude from one side surface of the arc portion 52 in the radial direction. Under normal conditions, the arc portion 52 covers the distal end surface 4c of the vane member 4 while being in contact with the inner peripheral surface 2a of the casing 2, while the radius portion 51 covers the inner surface of the vane member 4 on the side of the braking force exerting direction. 4e.

【0017】バネ部材7は、図1に示すように、上記し
たベーン部材4とベーンカバー5との間に配設されてい
る。具体的には、平面視で略コ字状に形成された嵌合部
7aがベーン部材4の先端面4cに形成された切欠4d
にはめ込まれ、該嵌合部7aの上端付近及び下端付近に
おける一方の角部から各々外方に延びる舌片7b,7b
がベーンカバー5の円弧部52の端部に内面から刻設さ
れた各係合溝52a,52aに係合されている(図1、
図5(b)及び図6参照)。これにより、バネ部材7
は、そのバネ作用により、ベーン部材4の制動力発揮方
向側の側面4eに沿って設けられたベーンカバー5の半
径部51を、常に、ベーン部材4の制動力発揮方向側の
側面4eに密着させる方向に付勢している。このため、
常態においては、図1に示すように、ベーンカバー5の
半径部51の内面が、ベーン部材4の制動力発揮方向側
の側面4eに密着した状態となっている。他方、図7に
示すように、回転軸3及びベーン部材4が非制動力発揮
方向(図上、反時計回り方向)に回転した場合において
は、バネ部材7の舌片7bが、液体室22内の粘性液体
8の圧力により回転軸3等の回転方向とは逆方向(図
上、時計回り方向)に変形する。これにより、ベーンカ
バー5の半径部51の内面が、ベーン部材4の制動力発
揮方向側の側面4eから離間して、ベーン部材4の先端
面4cに形成された切欠4dと、ベーンカバー5の半径
部51の内面及びベーン部材4の制動力発揮方向側の側
面4eとの間に形成される間隙とにより粘性液体8が通
過可能な還流路が形成される。
The spring member 7 is provided between the vane member 4 and the vane cover 5 as shown in FIG. Specifically, a fitting portion 7a formed in a substantially U-shape in plan view is provided with a notch 4d formed in the distal end surface 4c of the vane member 4.
Tongue pieces 7b, 7b each extending outward from one corner near the upper end and the lower end of the fitting portion 7a.
Are engaged with respective engagement grooves 52a, 52a formed from the inner surface at the end of the arc portion 52 of the vane cover 5 (FIG. 1,
FIG. 5 (b) and FIG. 6). Thereby, the spring member 7
The radial action 51 of the vane cover 5 provided along the side face 4 e of the vane member 4 on the side where the braking force is exerted is always in close contact with the side face 4 e of the vane member 4 on the side where the braking force is exerted by the spring action. It is biased in the direction to make it. For this reason,
In a normal state, as shown in FIG. 1, the inner surface of the radius portion 51 of the vane cover 5 is in a state of being in close contact with the side surface 4 e of the vane member 4 on the braking force exerting direction side. On the other hand, as shown in FIG. 7, when the rotating shaft 3 and the vane member 4 rotate in the non-braking force exerting direction (counterclockwise direction in the drawing), the tongue 7b of the spring member 7 Due to the pressure of the viscous liquid 8 in the interior, the viscous liquid 8 is deformed in a direction opposite to the rotation direction of the rotating shaft 3 (clockwise in the figure). As a result, the inner surface of the radius portion 51 of the vane cover 5 is separated from the side surface 4 e of the vane member 4 on the braking force exerting direction side, and the notch 4 d formed in the tip end surface 4 c of the vane member 4 A return path through which the viscous liquid 8 can pass is formed by the gap formed between the inner surface of the radius portion 51 and the side surface 4e of the vane member 4 on the braking force exerting direction side.

【0018】図1及び図7に基づき上記したロータリー
ダンパ1の作用を説明する。ロータリーダンパ1は、回
転軸3の一端31を制動対象となる回転蓋等の軸体(図
示せず)に連結し、ケーシング2を所定の位置に固定し
て使用される。回転蓋等が閉成動作する場合には、その
閉成動作に伴って、回転蓋等の軸体及びこれに連結され
た回転軸3とベーン部材4が制動力発揮方向(図上、時
計回り方向)に回転する。この際、ベーンカバー5は、
バネ部材7により、半径部51の内面がベーン部材4の
制動力発揮方向側の側面4eに密着する方向に付勢され
ているため、回転軸3等が回転する当初から遊びなく液
体室22内の粘性液体8を圧縮する。それにより、粘性
液体8はスペーサ板9に設けられたオリフィス溝91の
みを通じて流動し、その際に生じる抵抗により、ロータ
リーダンパ1は回転軸3等の回転当初から大きな制動力
を発揮することができる。その結果、回転蓋等を持ち上
げて僅かに開放動作させた後、閉成動作させた場合で
も、その閉成動作の当初から回転蓋等に制動力を付与し
て、回転軸3に連結された回転蓋等の軸体をゆっくりと
回動させ、回転蓋等の回転動作を遅動させることができ
る。なお、制動対象となる回転蓋等の重量などの要因に
より、ロータリーダンパ1の制動力が大きすぎたり、ま
た、制動力を大きく変更したり、制動力が強くなり始め
る位置を変更したい場合もある。かかる場合には、蓋部
材6を外し、スペーサ板9を他のスペーサ板と交換すれ
ば対応することが可能となる。
The operation of the above-described rotary damper 1 will be described with reference to FIGS. The rotary damper 1 is used by connecting one end 31 of the rotating shaft 3 to a shaft (not shown) such as a rotating lid to be braked, and fixing the casing 2 at a predetermined position. When the rotary lid or the like is closed, the shaft body of the rotary lid or the like, and the rotating shaft 3 and the vane member 4 connected to the rotary lid or the like are moved in the braking force exerting direction (clockwise in the figure). Direction). At this time, the vane cover 5
Since the inner surface of the radius portion 51 is urged by the spring member 7 in a direction in which the inner surface of the radius portion 51 comes into close contact with the side surface 4 e of the vane member 4 on the braking force exerting direction side, the inside of the liquid chamber 22 is free from play from the beginning when the rotating shaft 3 and the like rotate. Is compressed. Thereby, the viscous liquid 8 flows only through the orifice groove 91 provided in the spacer plate 9, and the resistance generated at that time allows the rotary damper 1 to exert a large braking force from the beginning of rotation of the rotary shaft 3 and the like. . As a result, even if the closing operation is performed after the rotating lid is lifted and slightly opened, the braking force is applied to the rotating lid and the like from the beginning of the closing operation, and the rotating lid is connected to the rotating shaft 3. By rotating the shaft body such as the rotating lid slowly, the rotating operation of the rotating lid or the like can be delayed. Depending on factors such as the weight of the rotating lid or the like to be braked, the braking force of the rotary damper 1 may be too large, or the braking force may be significantly changed, or it may be desired to change the position at which the braking force starts to increase. . In such a case, it is possible to cope by removing the lid member 6 and replacing the spacer plate 9 with another spacer plate.

【0019】他方、回転蓋等が開放動作する場合には、
その開放動作に伴って、回転蓋等の軸体及びこれに連結
された回転軸3とベーン部材4が非制動力発揮方向(図
上、反時計回り方向)に回転する。この際、バネ部材7
の舌片7bが、液体室22内の粘性液体8の圧力により
回転軸3等の回転方向とは逆方向(図上、時計回り方
向)に変形して、これに伴いベーンカバー5の半径部5
1の内面が、ベーン部材4の制動力発揮方向側の側面4
eから離間する。これにより、粘性液体8はオリフィス
溝91のほか、ベーン部材4の先端面4cに形成された
切欠4dと、ベーンカバー5の半径部51の内面及びベ
ーン部材4の制動力発揮方向側の側面4eとの間に形成
される間隙とを通じて流動するので、その際に生じる抵
抗が小さい。そのため、ロータリーダンパ1が発揮する
制動力も小さく、その結果、回転蓋等を、該回転蓋等の
自重に相当する力程度で開放させることができる。
On the other hand, when the rotating lid or the like opens,
With the opening operation, the shaft body such as the rotating lid and the rotating shaft 3 and the vane member 4 connected thereto rotate in the non-braking force exerting direction (counterclockwise direction in the figure). At this time, the spring member 7
Is deformed in the opposite direction (clockwise direction in the figure) to the rotation direction of the rotation shaft 3 and the like by the pressure of the viscous liquid 8 in the liquid chamber 22, and the radial portion of the vane cover 5 is accordingly 5
1 is a side surface 4 of the vane member 4 on the braking force exerting direction side.
Separate from e. As a result, the viscous liquid 8 is provided not only in the orifice groove 91 but also in the notch 4d formed in the tip end surface 4c of the vane member 4, the inner surface of the radial portion 51 of the vane cover 5, and the side surface 4e of the vane member 4 on the braking force exerting direction side. And flows through the gap formed between them, so that the resistance generated at that time is small. Therefore, the braking force exerted by the rotary damper 1 is small, and as a result, the rotary lid or the like can be opened with a force corresponding to the weight of the rotary lid or the like.

【0020】次に、本発明の第二の実施の形態を説明す
る。図8は第二の実施の形態に係るロータリーダンパ
1′を示す横断面図であり、このロータリーダンパ1′
は、上記したロータリーダンパ1とほぼ同様に構成され
るが、ベーンカバー5′及びバネ部材7′が、上記した
ロータリーダンパ1のベーンカバー5及びバネ部材7と
異なる形状等を有して構成されている。
Next, a second embodiment of the present invention will be described. FIG. 8 is a cross-sectional view showing a rotary damper 1 'according to the second embodiment.
Is substantially the same as the rotary damper 1 described above, except that the vane cover 5 'and the spring member 7' have a shape different from the vane cover 5 and the spring member 7 of the rotary damper 1 described above. ing.

【0021】ベーンカバー5′は、ベーン部材4′の両
側面4f′,4e′に沿って内面が密着して設けられる
半径部51a′,51b′を有する平面略U字状に形成
され、軸方向の長さがベーン部材4′とほぼ同じで、少
なくともベーン部材4′の先端面4c′を被覆するよう
に配設されている。図9に示すように、ベーンカバー
5′の、ベーン部材4′の一方の側面4f′に沿って設
けられる半径部51a′の軸方向中央部には、該半径部
51a′の形状が側面からみて略コ字状となるようにす
るための切欠53a′が形成されている。また、ベーン
部材4′の他方の側面4e′に沿って設けられる半径部
51b′の軸方向中央部には、所定の幅、長さにわた
り、外面から内面に向かって刻設された凹部53b′を
有しており、この結果、該半径部51b′の軸方向略中
央部には、内面側に薄肉の壁部51d′が形成されてい
る(図9(e)参照)。そして更に、薄肉の壁部51
d′には、還流時に粘性液体8′が通過可能な液体通過
孔54′が形成されている。
The vane cover 5 'is formed in a substantially U-shaped plane having radial portions 51a' and 51b 'whose inner surfaces are provided in close contact with both side surfaces 4f' and 4e 'of the vane member 4'. The length in the direction is substantially the same as that of the vane member 4 ', and is disposed so as to cover at least the tip end surface 4c' of the vane member 4 '. As shown in FIG. 9, the shape of the radius portion 51a 'is set at the center in the axial direction of the radius portion 51a' provided along one side surface 4f 'of the vane member 4'. A notch 53a 'is formed so as to be substantially U-shaped. Further, a concave portion 53b 'engraved from the outer surface to the inner surface over a predetermined width and length is provided at a central portion in the axial direction of the radial portion 51b' provided along the other side surface 4e 'of the vane member 4'. As a result, a thin wall portion 51d 'is formed on the inner surface side at a substantially central portion in the axial direction of the radius portion 51b' (see FIG. 9E). And furthermore, the thin wall portion 51
A liquid passage hole 54 'through which the viscous liquid 8' can pass at the time of reflux is formed in d '.

【0022】バネ部材7′は、図10に示すように、基
端部72′から突出する三つの片部71a′,71
b′,71c′を有する形状に形成され、このうちの両
側に形成される各片部71a′,71c′が中央に形成
される平板状の片部71b′に対して、側面からみて上
方に位置するよう曲げ加工されて形成されている(図1
0(a)参照)。そして、平板状の片部71b′がベー
ンカバー5′の半径部51b′に形成された凹部53
b′に位置し、液体通過孔54′を閉口するように配設
され、両側の各片部71a′,71c′が半径部51
b′において凹部53b′を挟んだ上下の肉部を縦方向
に貫通する孔部55′内に位置するように配設されてい
る。これにより、バネ部材7′は、そのバネ作用によ
り、常に、平板状の片部71b′をベーンカバー5′の
半径部51b′の薄肉の壁部51d′に密着させ、液体
通過孔54′を閉口している。
As shown in FIG. 10, the spring member 7 'has three pieces 71a', 71 protruding from the base end 72 '.
b ', 71c', each of which is formed on both sides thereof, and each of the pieces 71a ', 71c' is formed upward with respect to a plate-like piece 71b 'formed at the center as viewed from the side. It is formed by bending so as to be positioned (FIG. 1
0 (a)). A flat portion 71b 'is formed in a concave portion 53 formed in a radius portion 51b' of the vane cover 5 '.
b ', which is disposed so as to close the liquid passage hole 54'.
b 'is disposed so as to be located in a hole 55' vertically penetrating the upper and lower meat portions sandwiching the concave portion 53b '. Thus, the spring member 7 'always brings the flat plate-shaped portion 71b' into close contact with the thin wall portion 51d 'of the radius portion 51b' of the vane cover 5 'by the spring action thereof, thereby closing the liquid passage hole 54'. It is closed.

【0023】図8に基づきロータリーダンパ1′の作用
を説明する。ロータリーダンパ1′も上記したロータリ
ーダンパ1と同様に回転軸3′の一端を制動対象となる
回転蓋等の軸体(図示せず)に連結し、ケーシング2′
を所定の位置に固定して使用される。回転蓋等が閉成動
作する場合には、その閉成動作に伴って、回転蓋等の軸
体及びこれに連結された回転軸3′とベーン部材4′が
制動力発揮方向(図上、時計回り方向)に回転する。こ
の際、ベーンカバー5′は、バネ部材7′の平板状の片
部71b′により液体通過孔54′が閉口された状態で
ベーン部材4′を介してケーシング2′の内周面2a′
に摺接しつつ回転して粘性液体8′を圧縮するため、該
粘性液体8′がスペーサ板(図示せず)のオリフィス溝
のみを通じて流動することになる。また、この場合に、
ベーンカバー5′は、各半径部51a′,51b′の内
面がベーン部材4′の両側面4f′,4e′に沿って密
着しており、本実施の形態においても粘性液体8′を圧
縮するにあたって遊びがないので、ロータリーダンパ
1′は回転軸3′等の回転当初から大きな制動力を発揮
することができる。
The operation of the rotary damper 1 'will be described with reference to FIG. Similarly to the above-described rotary damper 1, the rotary damper 1 'has one end of the rotary shaft 3' connected to a shaft (not shown) such as a rotary lid to be braked, and a casing 2 '.
Is used in a fixed position. When the rotating lid or the like performs the closing operation, the shaft body of the rotating lid or the like and the rotating shaft 3 'and the vane member 4' connected to the rotating lid or the like move in the braking force exerting direction (in the drawing, (Clockwise). At this time, the vane cover 5 'is connected to the inner peripheral surface 2a' of the casing 2 'via the vane member 4' while the liquid passage hole 54 'is closed by the flat piece 71b' of the spring member 7 '.
The viscous liquid 8 ′ rotates while sliding on and compresses the viscous liquid 8 ′, so that the viscous liquid 8 ′ flows only through the orifice groove of the spacer plate (not shown). Also, in this case,
In the vane cover 5 ', the inner surfaces of the respective radial portions 51a' and 51b 'are in close contact with both side surfaces 4f' and 4e 'of the vane member 4', and also compress the viscous liquid 8 'in the present embodiment. Since there is no play, the rotary damper 1 'can exert a large braking force from the beginning of rotation of the rotating shaft 3' and the like.

【0024】他方、回転蓋等が開放動作する場合には、
その開放動作に伴って、回転蓋等の軸体及びこれに連結
された回転軸3′とベーン部材4′が非制動力発揮方向
(図上、反時計回り方向)に回転する。この際、図11
に示すように、バネ部材7′の平板状の片部71b′
が、粘性液体8′がベーンカバー5′の一方の半径部5
1a′の切欠53a′、ベーン部材4′の切欠4d′、
及びベーンカバー5′の他方の半径部51b′の液体通
過孔54′を通じて流動する際の圧力により押されて、
両側の片部71a′,71c′寄りに変形し、それによ
り、液体通過孔54′が開口される。その結果、粘性液
体8′がオリフィス溝以外に、該液体通過孔54′を通
じて、液体室22′内におけるベーン部材4′及びベー
ンカバー5′により仕切られた非制動力発揮方向側の室
22a′から制動力発揮方向側の室22b′へと流動可
能となるため、その際に生じる抵抗が小さくなり、従っ
て、ロータリーダンパ1′が発揮する制動力も小さくな
る。
On the other hand, when the rotating lid or the like is opened,
Along with the opening operation, the shaft body such as the rotating lid and the rotating shaft 3 'and the vane member 4' connected thereto rotate in the non-braking force exerting direction (counterclockwise direction in the figure). At this time, FIG.
As shown in the figure, a flat plate-shaped portion 71b 'of the spring member 7' is provided.
However, the viscous liquid 8 ′ is applied to one radius 5 of the vane cover 5 ′
1a 'notch 53a', vane member 4 'notch 4d',
And pressed by the pressure when flowing through the liquid passage hole 54 'of the other radial portion 51b' of the vane cover 5 ',
It is deformed near the piece portions 71a 'and 71c' on both sides, whereby the liquid passage hole 54 'is opened. As a result, the viscous liquid 8 'passes through the liquid passage hole 54' in addition to the orifice groove, and the chamber 22a 'on the non-braking force exerting direction side partitioned by the vane member 4' and the vane cover 5 'in the liquid chamber 22'. To the chamber 22b 'on the side where the braking force is exerted, the resistance generated at that time is reduced, and the braking force exerted by the rotary damper 1' is also reduced.

【0025】[0025]

【発明の効果】本発明の請求項1及び2に係るロータリ
ーダンパは、ベーン部材とベーンカバーとの間に、常態
においては、該ベーン部材の制動力発揮方向側の側面に
沿って設けられる該ベーンカバーの半径部を、該ベーン
部材の制動力発揮方向側の側面に密着させる方向に付勢
して、該ベーンカバーの半径部を該ベーン部材の制動力
発揮方向側の側面に密着させ、前記回転軸が非制動力発
揮方向に回転する場合には、前記粘性液体の圧力により
変形して、該ベーンカバーの半径部を該ベーン部材の制
動力発揮方向側の側面から離間させるバネ部材が設けら
れている。これにより、回転蓋等を開放させる場合に
は、ベーン部材とベーンカバーとの間に粘性液体が通過
可能な還流路が形成され、粘性液体がオリフィス溝のほ
か、この還流路をも通過するので、その際に生じる抵抗
が小さくなり、その結果、回転蓋等を、該回転蓋等の自
重に相当する力程度で開放させることができる。他方、
回転蓋等を閉成させる場合には、当初からベーンカバー
の半径部がベーン部材の制動力発揮方向側の側面に密着
して前記還流路を遮断しているので、回転軸等の回転当
初から大きな制動力を発揮することができる。その結
果、回転蓋等を持ち上げて僅かに開放動作させた後、閉
成動作させた場合でも、回転蓋等の閉成動作を遅動させ
ることができる。
The rotary damper according to the first and second aspects of the present invention is provided between the vane member and the vane cover in a normal state along the side surface of the vane member on the braking force exerting direction side. The radial portion of the vane cover is urged in a direction in which the radial portion of the vane member is in close contact with the side of the vane member on which the braking force is exerted, and the radial portion of the vane cover is in close contact with the side surface of the vane member on the side in which the braking force is exerted, When the rotating shaft rotates in the non-braking force exerting direction, a spring member that is deformed by the pressure of the viscous liquid and separates the radius portion of the vane cover from the side surface of the vane member on the braking force exerting direction side is provided. Is provided. Accordingly, when the rotary lid or the like is opened, a return path through which the viscous liquid can pass is formed between the vane member and the vane cover, and the viscous liquid passes through the return path in addition to the orifice groove. The resistance generated at this time is reduced, and as a result, the rotating lid or the like can be opened with a force corresponding to the weight of the rotating lid or the like. On the other hand,
When closing the rotary lid or the like, since the radius portion of the vane cover is in close contact with the side surface of the vane member on the braking force exerting direction side to block the return path from the beginning, the rotation shaft or the like is initially rotated. A large braking force can be exerted. As a result, the closing operation of the rotary lid or the like can be delayed even when the closing operation is performed after the rotary lid or the like is lifted and slightly opened.

【0026】また、請求項3及び4に係るロータリーダ
ンパによっても上記と同様の効果を奏することができ
る。すなわち、このロータリーダンパは、ベーン部材の
両側面に沿って内面が密着して設けられる半径部を有す
るベーンカバーの制動力発揮方向側の半径部に設けら
れ、常態においては、該ベーンカバーの液体通過孔を閉
口させ、前記回転軸が非制動力発揮方向に回転する場合
には、前記粘性液体の圧力により変形して、該ベーンカ
バーの液体通過孔を開口させるバネ部材が設けられてい
る。これにより、回転蓋等を開放させる場合には、ベー
ンカバーの液体通過孔を開口させ、粘性液体がオリフィ
ス溝以外に、該液体通過孔を通じて液体室内におけるベ
ーン部材及びベーンカバーにより仕切られた非制動力発
揮方向側の室から制動力発揮方向側の室へと流動可能と
なるため、その際に生じる抵抗が小さくなる。その結
果、回転蓋等を、該回転蓋等の自重に相当する力程度で
開放させることができる。他方、回転蓋等を閉成させる
場合には、当初からベーンカバーがベーン部材に遊びな
く設けられていると共に、バネ部材により前記液体通過
孔が閉口されているので、回転軸等の回転当初から大き
な制動力を発揮することができる。その結果、回転蓋等
を持ち上げて僅かに開放動作させた後、閉成動作させた
場合でも、回転蓋等の閉成動作を遅動させることができ
る。
Further, the rotary damper according to the third and fourth aspects can provide the same effect as above. That is, the rotary damper is provided at a radius portion on the side of the braking force exerting direction of the vane cover having a radius portion whose inner surface is provided in close contact with both side surfaces of the vane member. A spring member is provided which closes the passage hole and deforms by the pressure of the viscous liquid to open the liquid passage hole of the vane cover when the rotating shaft rotates in the direction of exerting the non-braking force. Accordingly, when the rotary lid or the like is opened, the liquid passage hole of the vane cover is opened, and the viscous liquid is separated from the orifice groove by the vane member and the vane cover in the liquid chamber through the liquid passage hole. Since it becomes possible to flow from the chamber on the power exerting direction side to the chamber on the braking force exerting direction side, the resistance generated at that time is reduced. As a result, the rotating lid or the like can be opened with a force corresponding to the weight of the rotating lid or the like. On the other hand, when closing the rotary lid or the like, since the vane cover is provided without play on the vane member from the beginning, and the liquid passage hole is closed by a spring member, the rotation shaft or the like is initially rotated. A large braking force can be exerted. As a result, the closing operation of the rotary lid or the like can be delayed even when the closing operation is performed after the rotary lid or the like is lifted and slightly opened.

【0027】また、請求項5のように、蓋部材の内側
に、裏面に粘性液体が通過する円弧状の液体流路を有す
る交換可能なスペーサ板を設ければ、制動力を変更した
い場合には、該スペーサ板を、オリフィス溝が種々の形
状に形成されている他のスペーサ板と交換することで対
応することができる。
According to a fifth aspect of the present invention, if a replaceable spacer plate having an arc-shaped liquid flow path through which a viscous liquid passes is provided on the back surface inside the cover member, the braking force can be changed. Can be dealt with by replacing the spacer plate with another spacer plate having orifice grooves formed in various shapes.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の第一の実施の形態に係るロータリー
ダンパを示す横断面図である。
FIG. 1 is a cross-sectional view showing a rotary damper according to a first embodiment of the present invention.

【図2】 同実施の形態に係るロータリーダンパを示す
縦断面図である。
FIG. 2 is a longitudinal sectional view showing the rotary damper according to the embodiment.

【図3】 同実施の形態で用いたスペーサ板を示す底面
図である。
FIG. 3 is a bottom view showing a spacer plate used in the embodiment.

【図4】 同実施の形態で用いた回転軸及びベーン部材
を示す右側面図である。
FIG. 4 is a right side view showing a rotating shaft and a vane member used in the embodiment.

【図5】 同実施の形態で用いたベーンカバーを示す図
であり、(a)は平面図、(b)は正面図である。
FIGS. 5A and 5B are views showing a vane cover used in the embodiment, wherein FIG. 5A is a plan view and FIG. 5B is a front view.

【図6】 同実施の形態で用いたバネ部材を示す図であ
り、(a)は平面図、(b)は左側面図である。
FIGS. 6A and 6B are views showing a spring member used in the embodiment, wherein FIG. 6A is a plan view and FIG. 6B is a left side view.

【図7】 同実施の形態に係るロータリーダンパの回転
軸が非制動力発揮方向に回転している状態を示す横断面
図である。
FIG. 7 is a cross-sectional view showing a state in which the rotary shaft of the rotary damper according to the embodiment is rotating in a direction in which a non-braking force is exerted.

【図8】 本発明の第二の実施の形態に係るロータリー
ダンパを示す横断面図である。
FIG. 8 is a cross-sectional view illustrating a rotary damper according to a second embodiment of the present invention.

【図9】 同実施の形態で用いたベーンカバーを示す図
であり、(a)は左側面図、(b)は平面図、(c)は
右側面図、(d)は(c)のA−A断面図、(e)は
(c)のB−B断面図、(f)は(c)のC−C断面図
である。
9A and 9B are diagrams showing a vane cover used in the embodiment, wherein FIG. 9A is a left side view, FIG. 9B is a plan view, FIG. 9C is a right side view, and FIG. FIG. 4A is a cross-sectional view taken along line AA, FIG. 4E is a cross-sectional view taken along line BB of FIG. 4C, and FIG.

【図10】 同実施の形態で用いたバネ部材を示す図で
あり、(a)は平面図、(b)は右側面図である。
FIGS. 10A and 10B are views showing a spring member used in the embodiment, wherein FIG. 10A is a plan view and FIG. 10B is a right side view.

【図11】 同実施の形態で用いたバネ部材の変形した
状態を示す平面図である。
FIG. 11 is a plan view showing a deformed state of a spring member used in the embodiment.

【図12】 従来のロータリーダンパを示す横断面図で
ある。
FIG. 12 is a cross-sectional view showing a conventional rotary damper.

【符号の説明】[Explanation of symbols]

1,1′ ロータリーダンパ 2,2′ ケーシング 21,21′ 隔壁部 22,22′ 液体室 3,3′ 回転軸 4,4′ ベーン部材 5,5′ ベーンカバー 6 蓋部材 7,7′ バネ部材 8,8′ 粘性液体 9 スペーサ板 91 オリフィス溝 1,1 'Rotary damper 2,2' Casing 21,21 'Partition 22,22' Liquid chamber 3,3 'Rotating shaft 4,4' Vane member 5,5 'Vane cover 6 Lid member 7,7' Spring member 8, 8 'viscous liquid 9 spacer plate 91 orifice groove

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 内周面から軸方向中心に向かって突出す
る隔壁部を備えた有底略円筒状のケーシングと、 該ケーシングの軸方向中心に沿って配設される回転軸
と、 該回転軸の外周面に突設され、前記ケーシング内に形成
された粘性液体が充填される液体室内で該回転軸と共に
回動すると共に、先端面に切欠を有するベーン部材と、 軸方向の長さが該ベーン部材とほぼ同じであると共に、
円弧部と半径部とを有する平面略L字状に形成され、少
なくとも該ベーン部材の先端面を被覆するベーンカバー
と、 前記ケーシングの上面開口部を閉塞する蓋部材とを有
し、 さらに、前記ベーン部材とベーンカバーとの間に設けら
れ、常態においては、該ベーン部材の制動力発揮方向側
の側面に沿って設けられる該ベーンカバーの半径部を、
該ベーン部材の制動力発揮方向側の側面に密着させる方
向に付勢し、前記回転軸が非制動力発揮方向に回転する
場合には、前記粘性液体の圧力により変形して、該ベー
ンカバーの半径部を該ベーン部材の制動力発揮方向側の
側面から離間させるバネ部材が設けられていることを特
徴とするロータリーダンパ。
1. A substantially cylindrical casing with a bottom provided with a partition protruding from an inner peripheral surface toward an axial center, a rotating shaft disposed along an axial center of the casing, and the rotation. A vane member protruding from the outer peripheral surface of the shaft and rotating together with the rotating shaft in a liquid chamber filled with the viscous liquid formed in the casing, and having a notch on a front end surface; It is almost the same as the vane member,
A vane cover that is formed in a plane substantially L-shape having an arc portion and a radius portion and covers at least a tip end surface of the vane member; and a lid member that closes an upper surface opening of the casing. A radius portion of the vane cover provided between the vane member and the vane cover, and normally provided along a side surface of the vane member on the braking force exerting direction side,
The vane member is urged in a direction in which it comes into close contact with the side surface on the braking force exerting direction side, and when the rotating shaft rotates in the non-braking force exerting direction, it is deformed by the pressure of the viscous liquid, and the vane cover A rotary damper provided with a spring member for separating a radius portion from a side surface of the vane member on the braking force exerting direction side.
【請求項2】 請求項1記載のロータリーダンパであっ
て、前記バネ部材が、前記ベーン部材の先端面に形成さ
れた切欠に嵌合可能な平面略コ字状の嵌合部と、該嵌合
部の上端付近及び下端付近における一方の角部から各々
外方に延びる舌片とを有することを特徴とするロータリ
ーダンパ。
2. The rotary damper according to claim 1, wherein the spring member has a substantially U-shaped flat fitting portion that can be fitted into a notch formed in a front end surface of the vane member. A tongue extending outward from one corner near the upper end and the lower end of the joint.
【請求項3】 内周面から軸方向中心に向かって突出す
る隔壁部を備えた有底略円筒状のケーシングと、 該ケーシングの軸方向中心に沿って配設される回転軸
と、 該回転軸の外周面に突設され、前記ケーシング内に形成
された粘性液体が充填される液体室内で該回転軸と共に
回動すると共に、先端面に切欠を有するベーン部材と、 平面略U字状に形成され、該ベーン部材の両側面に沿っ
て内面が密着して設けられる半径部を有すると共に、該
各半径部のうちの制動力発揮方向側の半径部に該粘性液
体が通過可能な還流用の液体通過孔を有し、軸方向の長
さが該ベーン部材とほぼ同じで、少なくとも該ベーン部
材の先端面を被覆するベーンカバーと、 前記ケーシングの上面開口部を閉塞する蓋部材とを有
し、 さらに、前記ベーンカバーの制動力発揮方向側の半径部
に設けられ、常態においては、該ベーンカバーの液体通
過孔を閉口させ、前記回転軸が非制動力発揮方向に回転
する場合には、前記粘性液体の圧力により変形して、該
ベーンカバーの液体通過孔を開口させるバネ部材が設け
られていることを特徴とするロータリーダンパ。
3. A substantially cylindrical casing having a bottom provided with a partition part protruding from an inner peripheral surface toward an axial center, a rotating shaft disposed along an axial center of the casing, and a rotation shaft. A vane member protruding from the outer peripheral surface of the shaft, rotating together with the rotation shaft in a liquid chamber filled with the viscous liquid formed in the casing, and having a notch on a front end surface thereof; It has a radius portion formed so that the inner surface is provided in close contact with both side surfaces of the vane member, and a reflux portion through which the viscous liquid can pass through the radius portion on the braking force exerting direction side of the radius portions. A vane cover having an axial length substantially equal to that of the vane member and covering at least a tip end surface of the vane member; and a lid member for closing an upper opening of the casing. And braking the vane cover. It is provided at the radius portion on the exertion direction side, and normally closes the liquid passage hole of the vane cover, and when the rotating shaft rotates in the non-braking force exerting direction, it is deformed by the pressure of the viscous liquid. And a spring member for opening a liquid passage hole of the vane cover.
【請求項4】 請求項3記載のロータリーダンパであっ
て、前記バネ部材が、基端部から突出する三つの片部を
有して形成され、このうちの両側に形成される各片部が
中央に形成される平板状の片部に対して、側面からみて
上方に位置するよう曲げ加工されていることを特徴とす
るロータリーダンパ。
4. The rotary damper according to claim 3, wherein the spring member is formed to have three pieces protruding from a base end, and each piece formed on both sides of the three pieces is formed. A rotary damper characterized by being bent so that a flat plate-shaped portion formed at the center is located above when viewed from the side.
【請求項5】 請求項1〜4のいずれか1項記載のロー
タリーダンパであって、前記蓋部材の内側に、裏面に前
記粘性液体が通過する円弧状のオリフィス溝を有する交
換可能なスペーサ板が設けられていることを特徴とする
ロータリーダンパ。
5. The replaceable spacer plate according to claim 1, wherein the rotary member has an arc-shaped orifice groove on a back surface inside the cover member, through which the viscous liquid passes. A rotary damper characterized by being provided with a rotary damper.
JP28636498A 1998-10-08 1998-10-08 Rotary damper Expired - Lifetime JP4101948B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28636498A JP4101948B2 (en) 1998-10-08 1998-10-08 Rotary damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28636498A JP4101948B2 (en) 1998-10-08 1998-10-08 Rotary damper

Publications (2)

Publication Number Publication Date
JP2000120747A true JP2000120747A (en) 2000-04-25
JP4101948B2 JP4101948B2 (en) 2008-06-18

Family

ID=17703435

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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US6840355B2 (en) 2001-12-12 2005-01-11 Sankyo Seiki Mfg. Co., Ltd. Rotary damper device
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EP1457704A1 (en) * 2001-11-27 2004-09-15 Kabushiki Kaisha Somic Ishikawa Rotary damper and automobile part comprising it and auxiliary mechanism of rotary operation
EP1457704A4 (en) * 2001-11-27 2006-01-11 Ishikawa Tekko Kk Rotary damper and automobile part comprising it and auxiliary mechanism of rotary operation
US6840355B2 (en) 2001-12-12 2005-01-11 Sankyo Seiki Mfg. Co., Ltd. Rotary damper device
CN100346086C (en) * 2002-08-07 2007-10-31 拓基轴承株式会社 Multi-axle rotation damper
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CN104948636A (en) * 2011-01-11 2015-09-30 株式会社利富高 Damper device
CN106937842A (en) * 2017-02-27 2017-07-11 厦门倍杰特科技股份公司 Damper
EP3872362A1 (en) 2020-02-27 2021-09-01 Kabushiki Kaisha Somic Ishikawa Rotary damper
JP2021134869A (en) * 2020-02-27 2021-09-13 株式会社ソミック石川 Rotary damper
EP4027035A1 (en) 2020-02-27 2022-07-13 Somic Management Holdings Inc. Rotary damper
US11603899B2 (en) 2020-02-27 2023-03-14 Somic Management Holdings Inc. Rotary damper
JP7336655B2 (en) 2020-02-27 2023-09-01 株式会社ソミックマネージメントホールディングス rotary damper

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