JP3169305B2 - Sliding door closer - Google Patents
Sliding door closerInfo
- Publication number
- JP3169305B2 JP3169305B2 JP14155494A JP14155494A JP3169305B2 JP 3169305 B2 JP3169305 B2 JP 3169305B2 JP 14155494 A JP14155494 A JP 14155494A JP 14155494 A JP14155494 A JP 14155494A JP 3169305 B2 JP3169305 B2 JP 3169305B2
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- oil
- piston
- air
- sliding door
- 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 - Fee Related
Links
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、車輌の連結部の引戸な
どの開閉に用いられる縦設置式の引戸用ドアクローザに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical door-type door closer used for opening and closing a sliding door at a connecting portion of a vehicle.
【０００２】[0002]
【従来の技術】従来、この種のドアクローザとして、例
えば図２に示すようなものが知られている。このドアク
ローザは、シリンダ１１と、有底円筒状をなし,底部に
相当する頭部１２aの中心の貫通穴１３に作動油の流入
を阻止する逆止弁１４を有し,側部１２bにラック１５を
有して上記シリンダ１１内の油室１６に摺動自在に嵌装
されたピストン１２と、このピストン１２で区切られる
他方の油室(ばね室)１６bにピストン１２を一方の油室
(圧縮室)１６aの端部まで付勢すべく縮装されたばね１
７,１８と、上記圧縮室１６aをばね室１６bに連通する
ようにシリンダ１１の壁内に設けられた第１,第２の油
路１９,２０と、上記ラック１５に噛合し,軸２２をシリ
ンダ壁に回転自在に支承してシリンダ１１内に収容され
たピニオン２１からなる。2. Description of the Related Art Conventionally, as this type of door closer, for example, the one shown in FIG. 2 is known. This door closer has a cylinder 11, a bottomed cylindrical shape, a check valve 14 for preventing the flow of hydraulic oil into a through hole 13 at the center of a head 12a corresponding to the bottom, and a rack 15 on a side 12b. And a piston 12 slidably fitted in an oil chamber 16 in the cylinder 11 and the piston 12 in the other oil chamber (spring chamber) 16b separated by the piston 12.
(Compression chamber) Spring 1 compressed to urge to the end of 16a
7, 18 and the first and second oil passages 19 and 20 provided in the wall of the cylinder 11 so that the compression chamber 16a communicates with the spring chamber 16b. It comprises a pinion 21 rotatably supported on the cylinder wall and housed in the cylinder 11.
【０００３】上記第１の油路１９は、図２(Ｂ)に示すよ
うに、圧縮室１６aの中央寄りの第１ポートＰ1から、軸
方向通路１９a,ピニオン２１の周囲間隙,軸方向に延在
するピストン外周の環状溝２３の後部およびピストン径
方向の貫通穴２４を経てばね室１６bに連通するととも
に、端部を第１ポートＰ1近傍に位置させ,頭部をシリン
ダ１１の前端面に螺合した第１の速度調整弁２５を有す
る。また、上記第２の油路２０は、図２(Ａ)に示すよう
に、圧縮室１６aの端部の第２ポートＰ2から、軸方向通
路２０a,上記環状溝２３の前部および上記貫通穴２４を
経てばね室１６bに連通するとともに、端部を軸方向通
路２０aの中間段部に位置させ,頭部をシリンダ１１の前
端面に螺合した第２の速度調整弁２６を有する。図２で
述べたドアクローザ３１は、図３に示すように、壁３６
と側壁３７との隅部の床上に、上記圧縮室１６aを上に
して垂設され、このドアクローザ３１の外部に突出する
上記ピニオン軸２２に、開閉アーム３２の一端を固定
し、この開閉アーム３２の他端に枢着したローラを、引
戸３３の縦縁に沿って固定した滑り金具３４に摺動自在
に嵌合している。そして、開閉アーム３２の二点鎖線で
示す旋回運動によって、引戸３３を床に沿って右左に動
かせて、連結部への開口部３５を開閉するのである。[0003] The first oil passage 19, as shown in FIG. 2 (B), from the first port P 1 of the inboard of the compression chamber 16a, the axial passage 19a, around the gap of the pinion 21, in the axial direction communicates with the spring chamber 16b through the rear and the piston radial direction of the through hole 24 of the extending piston outer periphery of the annular groove 23, to position the end portion to the first port P 1 near the front end surface of the head cylinder 11 And a first speed control valve 25 screwed into the first speed control valve. Further, the second oil passage 20, as shown in FIG. 2 (A), from the second port P 2 of the end of the compression chamber 16a, the axial passage 20a, the front and the through of the annular groove 23 It has a second speed regulating valve 26 communicating with the spring chamber 16 b through the hole 24, having an end located at an intermediate step of the axial passage 20 a, and having a head screwed to the front end face of the cylinder 11. As shown in FIG. 3, the door closer 31 described with reference to FIG.
One end of an opening / closing arm 32 is fixed to the pinion shaft 22 which is vertically provided with the compression chamber 16a facing upward on the floor at the corner of the door and the side wall 37, and protrudes outside the door closer 31. Is slidably fitted to a slide fitting 34 fixed along the vertical edge of the sliding door 33. Then, the sliding door 33 can be moved right and left along the floor by the turning motion of the opening / closing arm 32 indicated by the two-dot chain line, and the opening 35 to the connecting portion is opened / closed.
【０００４】上記開閉アーム３２の旋回運動は、ドアク
ローザ３１によって次のように行なわれる。使用者が把
手を掴んで引戸３３を、図３中で右側へ動かして開く
と、ローラが引戸３３の滑り金具３４に沿って上方へ摺
動するに伴って、開閉アーム３２は二点鎖線の如く上方
へ旋回する。この開閉アーム３２の旋回により、軸２２
を介してピニオン２１は、図２(Ａ)の矢印方向に回転
し、これに噛合するピストン１２は、同図に示す上死点
からばね１７,１８を押し縮めながらばね室１６bに向か
って復動する。すると、ばね室１６b内の作動油は、ピ
ストン頭部１２aの逆止弁１４を押し上げつつ貫通穴１
３を抜けて圧縮室１６aに流入し、引戸３３が全開する
と、ピストン１２は、図２(Ｂ)に示す下死点に達する。
次に、使用者が引戸３３の把手を離すと、押し縮められ
たばね１７,１８の復元に伴って、ピストン１２が圧縮
室１６aに向かって往動し、ピストン１２のラック１５
に噛合するピニオン２１は、図２(Ｂ)の矢印方向に回転
して、軸２２を介して開閉アーム３２を下方(図３参照)
に旋回させ、滑り金具３４を介して引戸３３は、図３の
左方向へ閉動せしめられる。The pivoting movement of the opening / closing arm 32 is performed by the door closer 31 as follows. When the user grips the handle and opens the sliding door 33 by moving it to the right in FIG. 3, as the roller slides upward along the sliding bracket 34 of the sliding door 33, the opening / closing arm 32 becomes a two-dot chain line. Turn upward like this. The rotation of the opening / closing arm 32 causes the shaft 22 to rotate.
2A, the pinion 21 rotates in the direction of the arrow in FIG. 2A, and the piston 12 meshing with the pinion 21 returns toward the spring chamber 16b while compressing the springs 17, 18 from the top dead center shown in FIG. Move. Then, the hydraulic oil in the spring chamber 16b pushes up the check valve 14 of the piston head 12a while the through-hole 1 is raised.
3 and flows into the compression chamber 16a, and when the sliding door 33 is fully opened, the piston 12 reaches the bottom dead center shown in FIG.
Next, when the user releases the handle of the sliding door 33, the piston 12 reciprocates toward the compression chamber 16a with the restoration of the compressed springs 17, 18 and the rack 15 of the piston 12 moves.
2B rotates in the direction of the arrow in FIG. 2 (B) to lower the open / close arm 32 via the shaft 22 (see FIG. 3).
The sliding door 33 is closed to the left in FIG.
【０００５】ピストン１２の往動の際、ピストン頭部１
２aの逆止弁１４が閉じるので、圧縮室１６a内の作動油
は、まず往動前半行程において開いている第１ポートＰ
1からの流路抵抗の小さい第１の油路１９を経てばね室
１６bに流入して、ピストン１２が比較的速い第１速度
で動き、続いて往動後半行程において開く第２ポートＰ
2からの流路抵抗の大きい第２の油路２０を経てばね室
１６bに流入して、ピストン１２の動きは第２速度まで
遅くなり、最後に図２(Ａ)の上死点に達して停止して、
引戸３３は全閉する。When the piston 12 moves forward, the piston head 1
Since the check valve 2a is closed, the hydraulic oil in the compression chamber 16a first flows through the first port P which is open in the first half of the forward movement.
The piston 12 flows into the spring chamber 16b through the first oil passage 19 having a small flow resistance from the first port 19, and the piston 12 moves at a relatively high first speed, and then opens in the second half of the forward stroke.
2 flows into the spring chamber 16b through the second oil passage 20 having a large flow path resistance, and the movement of the piston 12 slows down to the second speed, and finally reaches the top dead center in FIG. Stop,
The sliding door 33 is fully closed.
【０００６】[0006]
【発明が解決しようとする課題】ところで、上記ドアク
ローザ３１の使用温度は、たとえば−２０℃〜＋５０℃
程度に定められており、作動油の膨張係数がシリンダ１
１の材料であるアルミニウムのそれよりもかなり大きい
ことから、油室１６には、使用温度範囲に対応する作動
油のシリンダ１１内での見掛け膨張体積に等しい体積の
空気を封入している。従って、ピストン１２が図２(Ｂ)
に示す下死点にあるとき、圧縮室１６aを上にして垂設
されたシリンダ１１内の作動油の油面は、一例の使用最
高温度の５０℃では上端の第２ポートＰ2に達するが、
使用通常温度の２０℃では例えば同図の二点鎖線で示す
位置にあり、その上は空気層になっている。The operating temperature of the door closer 31 is, for example, -20.degree. C. to + 50.degree.
The expansion coefficient of the hydraulic oil is
The oil chamber 16 is filled with air having a volume equal to the apparent expansion volume in the cylinder 11 of the hydraulic oil corresponding to the operating temperature range, since it is considerably larger than that of aluminum as the first material. Therefore, the piston 12 is moved to the position shown in FIG.
When in the bottom dead center shown in, the oil level of the hydraulic oil in the cylinder 11 provided vertically in the upper compression chamber 16a is reaches the second port P 2 of 50 ° C. At the upper end of an example the maximum temperature used in ,
At the normal use temperature of 20 ° C., for example, it is located at a position shown by a two-dot chain line in FIG.
【０００７】しかし、この空気層があるため、上記従来
の縦設置式のドアクローザでは、次のような問題が生じ
る。即ち、ピストン１２が、図２(Ｂ)に示す下死点から
ばね１７,１８の力で圧縮室１６aに向かって往動し始
め、全開状態の引戸３３が閉じ始める場合、圧縮室１６
aの上端の第２ポートＰ2に連なる第２の油路２０は、ピ
ストン頭部１２aの側面で閉ざされるので、作動油より
も遥かに圧縮されやすい空気層の空気が圧縮されて急速
に体積を減じ、ピストン１２が急速往動する。その後、
圧縮室１６a内の作動油が圧縮されて第１の油路１９を
経てばね室１６bに流入することにより、ピストン１２
は急速往動よりも遅い既述の第１速度で往動する。とこ
ろが、引戸３３の開き寸法が少ない場合は、ピストン１
２が図２(Ａ)と(Ｂ)の中間位置から往動を開始するた
め、急速往動による空気層の圧縮が終わった時点で、ピ
ストンが図２(Ａ)の上死点近傍まで達してしまい、引戸
３３は、第１速度よりも速い急速往動の速度で戸当たり
に衝突して閉まることになる。However, the presence of this air layer causes the following problems in the above-described conventional vertically installed door closer. That is, when the piston 12 starts to move toward the compression chamber 16a from the bottom dead center shown in FIG. 2B by the force of the springs 17 and 18 and the fully opened sliding door 33 starts closing, the compression chamber 16
second oil passage 20 communicating with the second port P 2 of the upper end of a can, since the closed at the side of the piston head 12a, rapidly and air in the air layer likely to be much compressed than the working fluid is compressed volume , And the piston 12 rapidly moves forward. afterwards,
The working oil in the compression chamber 16a is compressed and flows into the spring chamber 16b via the first oil passage 19, so that the piston 12
Moves forward at the above-mentioned first speed which is slower than the rapid forward movement. However, when the opening size of the sliding door 33 is small, the piston 1
2 starts the forward movement from the intermediate position between FIGS. 2 (A) and 2 (B), and when the compression of the air layer by the rapid forward movement ends, the piston reaches the vicinity of the top dead center in FIG. 2 (A). As a result, the sliding door 33 collides with the door stop at a speed of the fast forward movement higher than the first speed and closes.
【０００８】引戸の開き寸法が少ない場合のかかる急速
動は、閉じ終わりは遅くあるべきという使用者の感覚に
なじまず、使用者に違和感や危険感を与えるという不具
合がある。また、最近の建築物や車輌の高級化に伴っ
て、スペースを要さず,床の掃除等もしやすい縦設置式
のドアクローザは、建築物のみならず車輌の連結部や、
さらにトイレや更衣室の扉にも適用されつつあるが、上
述の急速動は、高級なイメージを低下させることにもな
る。そこで、本発明の目的は、シリンダの圧縮室端に、
空気層の初期圧縮をなくすような空気室を設けることに
よって、開き寸法が少なくても引戸が急速動せず、美感
に優れかつ省スペースで縦設置できる引戸用ドアクロー
ザを提供することにある。[0008] Such a rapid movement when the opening size of the sliding door is small does not conform to the user's sensation that the closing end should be late, and has a disadvantage of giving the user a sense of discomfort and danger. In addition, with the recent upscaling of buildings and vehicles, a vertically installed door closer that does not require space and is easy to clean the floor is used not only for buildings but also for connecting parts of vehicles,
Further, while being applied to toilets and doors of changing rooms, the rapid movement described above also degrades a high-grade image. Therefore, an object of the present invention is to provide an end of a compression chamber of a cylinder with:
An object of the present invention is to provide a door closer for sliding doors which is excellent in aesthetics and can be installed vertically in a space-saving manner by providing an air chamber which eliminates the initial compression of the air layer, whereby the sliding door does not move rapidly even if the opening size is small.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、本発明の引戸用ドアクローザは、頭部の貫通穴に作
動油の流入を阻止する逆止弁を有し、側部または胴内に
ラックを有するピストンをシリンダ内の油室に摺動自在
に嵌装し、このピストンで区切られる他方の油室に上記
ピストンを一方の油室端まで付勢するばねを縮装すると
ともに、シリンダ壁内に上記一方の油室を他方の油室に
連通する油路を設ける一方、上記ラックに噛合するピニ
オンの軸をシリンダ壁に回転自在に支承してなり、上記
一方の油室を上にして垂設されるドアクローザと、この
ドアクローザの上記ピニオンの軸に一端を固定し、引戸
の縁に沿って固定された滑り金具に他端を摺動自在に嵌
合した開閉アームで構成される引戸用ドアクローザにお
いて、上記油路は、使用最高温度における垂設されたシ
リンダの上記一方の油室の作動油面の直上に一端が開口
するとともに、この開口の上方に上記一方の油室に連ね
てシリンダ内に設けられた空気室と、この空気室と一方
の油室を仕切るように設けられ、作動油の浮力を受けて
閉成する空気逃がし弁とを備えたことを特徴とする。SUMMARY OF THE INVENTION In order to achieve the above object, a door closer for a sliding door according to the present invention has a check valve for preventing inflow of hydraulic oil into a through hole in a head, and a check valve is provided in a side portion or inside a body. A piston having a rack is slidably fitted in an oil chamber in the cylinder, and a spring for urging the piston to one oil chamber end is compressed in the other oil chamber divided by the piston, and a cylinder wall is provided. An oil passage communicating the one oil chamber with the other oil chamber is provided therein, and a shaft of a pinion meshing with the rack is rotatably supported on a cylinder wall, with the one oil chamber facing up. For a sliding door constituted by a vertically-closed door closer and an opening / closing arm having one end fixed to a shaft of the pinion of the door closer and the other end slidably fitted to a sliding bracket fixed along an edge of the sliding door. In the door closer, the oil passage is: One end of the one-side oil chamber of the vertically disposed cylinder at the highest temperature for use has an opening directly above the hydraulic oil surface, and an air chamber provided in the cylinder above the opening and connected to the one-side oil chamber. An air release valve is provided so as to partition the air chamber and one of the oil chambers, and is closed by receiving the buoyancy of hydraulic oil.
【００１０】上記空気逃がし弁を、円形の仕切板と、こ
の仕切板の中心に、上記一方の油室側が大径の弁室をな
し,上記空気室側が小径の弁座をなすように設けられた
貫通穴と、作動油に浸ったときに上記弁座に着座するよ
うに上記弁室に遊嵌された球状の弁体で構成してもよ
い。また、上記空気室の体積を、使用温度範囲に対応す
るシリンダ内における作動油の膨張体積に略等しくする
こともできる。The air release valve is provided with a circular partition plate and a center of the partition plate so that the one oil chamber side forms a large-diameter valve chamber and the air chamber side forms a small-diameter valve seat. And a spherical valve element loosely fitted in the valve chamber so as to be seated on the valve seat when immersed in hydraulic oil. Further, the volume of the air chamber can be made substantially equal to the expansion volume of the hydraulic oil in the cylinder corresponding to the operating temperature range.
【００１１】[0011]
【作用】使用者が引戸を全開すると、引戸の縁に固定さ
れた滑り金具に沿って開閉アームの他端が摺動し、この
開閉アームの一端に固定された軸を介してピニオンが戻
り方向へ回転し、これに噛合するラックを介して、シリ
ンダ内のピストンは、上死点からばねを押し縮めつつ他
方の油室に向かって復動して下死点に達する。次に、使
用者が引戸から手を離すと、ピストンは、復元しようと
するばねから力を受けて、頭部の貫通穴の逆止弁を閉じ
た状態で一方の油室に向かって往動する。このとき、垂
設されたシリンダの頂部となる上記一方の油室の上端
は、作動油の膨張を吸収すべく空気層になっているが、
一方の油室において作動油よりも圧縮されやすい上記空
気層の空気が、上記ピストンの往動によってまず圧縮さ
れようとする。しかし、一方の油室の頂部は空気逃がし
弁で仕切られ、この弁は空気中にあって作動油の浮力を
受けることなく開成しているので、上記空気層の空気
は、圧縮が進まないうちに空気逃がし弁を通って上方の
空気室に流れ込む。従って、ピストンの往動開始から極
短時間のうちに、一方の油室上端の空気は総て空気室に
移り、作動油の油面は油室上端の開口および空気逃がし
弁に達し、空気逃がし弁が作動油の浮力を受けて閉じ、
空気室への流入を阻止された作動油は、上記開口からシ
リンダ壁内の油路を経て他方の油室に流入する。When the user fully opens the sliding door, the other end of the opening / closing arm slides along a slide fitting fixed to the edge of the sliding door, and the pinion returns in the return direction via a shaft fixed to one end of the opening / closing arm. Then, the piston in the cylinder moves backward from the top dead center toward the other oil chamber while pressing and compressing the spring, and reaches the bottom dead center via the rack meshing therewith. Next, when the user removes his / her hand from the sliding door, the piston moves forward toward one oil chamber with the check valve in the through hole in the head closed with the force from the spring to be restored. I do. At this time, the upper end of the one oil chamber, which is the top of the vertically provided cylinder, is an air layer to absorb the expansion of the hydraulic oil,
The air in the air layer, which is more likely to be compressed in the one oil chamber than the hydraulic oil, first tries to be compressed by the forward movement of the piston. However, the top of one of the oil chambers is separated by an air release valve, which is open in the air without receiving the buoyancy of the hydraulic oil, so that the air in the air layer is compressed before the compression proceeds. Through the air relief valve into the upper air chamber. Therefore, within a very short time from the start of the forward movement of the piston, all the air at the upper end of one oil chamber is transferred to the air chamber, and the oil level of the hydraulic oil reaches the opening at the upper end of the oil chamber and the air release valve, and the air is released. The valve closes under the buoyancy of hydraulic oil,
The hydraulic oil, whose flow into the air chamber has been prevented, flows into the other oil chamber from the opening via the oil passage in the cylinder wall.
【００１２】つまり、一方の油室の上方に空気逃がし弁
で仕切られた空気室を設けることによって、ピストン往
動行程の初期における従来のような空気層の圧縮がなく
なるからピストンの急速往動もなくなり、ピストンは、
上記ばねのばね定数および油路の流路抵抗等で定まる所
定の速度に制御されて上死点まで往動し、ラックの往
動,ピニオンの往き方向回転,開閉アームの旋回により滑
り金具を介して、引戸が急速閉動することなく制御され
た所定速度で閉動する。なお、空気室に流れ込んだ空気
は、続くピストンの復動開始時に油面の低下で開成する
空気逃がし弁を通って、再び一方の油室に流入する。な
お、以上の動作は、引戸が半開状態まで開かれ、ピスト
ンが上死点と下死点の中間まで復動した場合にも言え、
引戸の開き寸法が少ない場合の急速閉動もなくなるの
で、使用者に操作上の違和感や危険感を与えることがな
い。That is, by providing an air chamber separated by an air release valve above one oil chamber, the compression of the air layer at the beginning of the piston forward stroke is eliminated, so that the rapid forward movement of the piston is also reduced. And the piston
Controlled at a predetermined speed determined by the spring constant of the above-mentioned spring and the flow path resistance of the oil passage, it moves forward to the top dead center, and the rack moves forward, the pinion moves in the forward direction, and the opening / closing arm turns, and slides through the fitting. Thus, the sliding door closes at a controlled predetermined speed without rapidly closing. The air that has flowed into the air chamber flows into one of the oil chambers again through an air release valve that is opened due to a decrease in the oil level at the start of the subsequent return movement of the piston. In addition, the above operation can be said when the sliding door is opened to the half-open state and the piston moves back to the middle between the top dead center and the bottom dead center,
Since the quick closing movement when the opening size of the sliding door is small is also eliminated, the user does not feel uncomfortable or danger in operation.
【００１３】上記空気逃がし弁を、円形の仕切板と、こ
の仕切板の中心に、上記一方の油室側が大径の弁室をな
し,上記空気室側が小径の弁座をなすように設けられた
貫通穴と、作動油に浸ったときに上記弁座に着座するよ
うに上記弁室に遊嵌された球状の弁体で構成すれば、ピ
ストンの往動開始時の油面の上昇で、弁室に遊嵌された
弁体が作動油に浸ったとき、弁体が浮力を受けて浮上し
て弁座に着座して、空気室への作動油の流入を阻止する
一方、ピストンの復動による油面の低下で弁体が弁座か
ら離れて、空気室から一方の油室へ空気を流入させる。
かかる構成の空気逃がし弁は、内部空間が空気室をなす
シリンダの端部蓋の先端等に嵌装してシリンダに組み込
むことができ、構造が簡素化し、保守,点検にも便利で
ある。The air release valve is provided with a circular partition plate and a center of the partition plate so that the one oil chamber side forms a large-diameter valve chamber and the air chamber side forms a small-diameter valve seat. And a spherical valve element that is loosely fitted in the valve chamber so as to be seated on the valve seat when immersed in hydraulic oil, the oil level rises at the start of forward movement of the piston, When the valve element loosely fitted in the valve chamber is immersed in the hydraulic oil, the valve element receives the buoyancy and floats to sit on the valve seat, thereby preventing the hydraulic oil from flowing into the air chamber and returning the piston. The valve body separates from the valve seat due to the decrease in the oil level due to the movement, and the air flows from the air chamber to one of the oil chambers.
The air release valve having such a configuration can be fitted into a cylinder or the like by fitting the inner space to the end of an end cover of a cylinder forming an air chamber, so that the structure is simplified, and it is convenient for maintenance and inspection.
【００１４】また、上記空気室の体積を、使用温度範囲
に対応するシリンダ内における作動油の膨張体積に略等
しくすれば、ピストンの往動開始後直ちに、一方の油室
上端の空気層を総て空気室に移し、作動油の油面を油室
上端の開口および空気逃がし弁に達せしめることがで
き、ピストン往動開始時の空気層の圧縮およびピストン
の急速往動を確実になくして、引戸を確実に制御された
所定速度で閉動させることができる。If the volume of the air chamber is made substantially equal to the expansion volume of the hydraulic oil in the cylinder corresponding to the operating temperature range, the air layer at the upper end of one of the oil chambers is totally collected immediately after the piston starts moving forward. To move the oil level of the hydraulic oil to the opening at the upper end of the oil chamber and the air release valve, and reliably eliminate the compression of the air layer and the rapid forward movement of the piston at the start of piston forward movement. The sliding door can be reliably closed at a controlled predetermined speed.
【００１５】[0015]
【実施例】以下、本発明を図示の実施例により詳細に説
明する。図１は、本発明の引戸用ドアクローザに一例を
示す縦断面図であり、この引戸用ドアクローザは、シリ
ンダの一方の油室（圧縮室)側の構造が異なる点を除い
て、図２で述べた従来のドアクローザと同じ構成であ
り、引戸に対して図３と同様に配置,連結されるので、
同じ部材には同一番号を付して説明を省略する。垂設さ
れたシリンダ１の頂部をなす圧縮室１６a側の端面に
は、外周ねじを有する有底円筒状のヘッドキャップ２が
液密に螺着されている。ヘッドキャップ２の円筒壁先端
の環状溝には、円形の仕切板４と、この仕切板４の中心
に下部が大径の弁室７をなし,上部が小径の弁座６をな
すように設けられた貫通穴５と、作動油に浸ったときに
弁座６に着座するように上記弁室７に遊嵌された樹脂製
の球状の弁体８と、この弁体８の抜け落ちを防止する保
持爪９とからなる空気逃がし弁１０を、仕切板４の外周
に装着したパッキン３０を介して液密に嵌着している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a longitudinal sectional view showing an example of a sliding door closer of the present invention. This sliding door closer is described with reference to FIG. 2 except that a structure on one oil chamber (compression chamber) side of a cylinder is different. It has the same configuration as the conventional door closer, and is arranged and connected to the sliding door in the same manner as in FIG.
The same members are denoted by the same reference numerals and description thereof will be omitted. A bottomed cylindrical head cap 2 having an outer peripheral thread is screwed onto the end face on the side of the compression chamber 16a forming the top of the vertically provided cylinder 1 in a liquid-tight manner. In the annular groove at the tip of the cylindrical wall of the head cap 2, a circular partition plate 4 and a large-diameter valve chamber 7 at the lower portion and a small-diameter valve seat 6 at the upper portion are provided at the center of the partition plate 4. And a resin-made spherical valve body 8 loosely fitted in the valve chamber 7 so as to be seated on the valve seat 6 when immersed in hydraulic oil, and to prevent the valve body 8 from falling off. An air release valve 10 including the holding claw 9 is fitted in a liquid-tight manner via a packing 30 mounted on the outer periphery of the partition plate 4.
【００１６】上記空気逃がし弁１０によって、ヘッドキ
ャップ２の内部は、シリンダ１内の圧縮室１６aから分
離された空気室３をなし、この空気室３の容積は、例え
ば−２０℃〜＋５０℃の使用温度範囲に対応するシリン
ダ１の膨張を加味した作動油の見掛け膨張体積に略等し
く、かつ使用通常温度(２０℃)でピストン１２が下死点
にある場合の作動油の油面(図１の二点鎖線参照)の上方
の空気層の体積より少し大きい。また、上記空気室の体
積は、シリンダ１内の全作動油の体積の略１５％程度に
なる。The inside of the head cap 2 forms an air chamber 3 separated from the compression chamber 16a in the cylinder 1 by the air release valve 10, and the volume of the air chamber 3 is, for example, -20 ° C. to + 50 ° C. The oil level of the hydraulic oil when the piston 12 is at the bottom dead center at the normal operating temperature (20 ° C.) and approximately equal to the apparent expansion volume of the hydraulic oil in consideration of the expansion of the cylinder 1 corresponding to the operating temperature range (FIG. 1) Is slightly larger than the volume of the air layer above. The volume of the air chamber is about 15% of the volume of all the hydraulic oil in the cylinder 1.
【００１７】上記構成の引戸用ドアクローザは、次のよ
うに動作する。車輌の使用者が、把手を掴んで図３に示
す引戸３３を図中で右側へ全開するとき、引戸３３の縦
縁に固定された滑り金具３４に沿って先端が摺動する開
閉アーム３２は、二点鎖線の如く上方へ旋回し、開閉ア
ーム３２の基端に固定された軸２２を介してピニオン２
１が、図１の矢印と逆方向に回転し、これに噛合するラ
ック１５を介して、シリンダ１内のピストン１２は、上
端の上死点からばね１７,１８を押し縮めつつばね室１
６bに向かって下方へ復動し、ばね室１６b内の作動油は
ピストン頭部１２aの逆止弁１４を押し上げつつ貫通穴
１３を通って圧縮室１６aに流入し、引戸３３が全開す
るとピストン１２は図１に示す下死点に達する。次に、
使用者が引戸３３から手を離すと、ピストン１２は、復
元しようとするばね１７,１８から力を受けて、頭部１
２aの貫通穴１３の逆止弁１４を閉じた状態でばね室１
６bに向かって上方へ往動する。このとき、垂設された
シリンダ１の頂部となる圧縮室１６aの上端は、図１の
二点鎖線から上が作動油の膨張を吸収するための空気層
になっているが、圧縮室１６aにおいて作動油よりも遥
かに圧縮されやすい上記空気層の空気が、上記ピストン
の往動によってまず圧縮されようとする。The sliding door closer constructed as described above operates as follows. When the user of the vehicle grasps the handle and fully opens the sliding door 33 shown in FIG. 3 to the right in the figure, the opening / closing arm 32 whose tip slides along a slide fitting 34 fixed to a vertical edge of the sliding door 33 is provided. Is pivoted upward as indicated by a two-dot chain line, and the pinion 2 is rotated via the shaft 22 fixed to the base end of the opening / closing arm 32.
1 rotates in the direction opposite to the arrow in FIG. 1, and the piston 12 in the cylinder 1 is compressed by pressing the springs 17 and 18 from the top dead center of the upper end of the spring chamber 1 through the rack 15 meshing with the spring chamber 1.
6b, the hydraulic oil in the spring chamber 16b flows into the compression chamber 16a through the through hole 13 while pushing up the check valve 14 of the piston head 12a, and when the sliding door 33 is fully opened, the piston 12 Reaches the bottom dead center shown in FIG. next,
When the user releases the sliding door 33, the piston 12 receives a force from the springs 17 and 18 to be restored, and
With the check valve 14 of the through hole 13 of 2a closed, the spring chamber 1
It moves upward toward 6b. At this time, the upper end of the compression chamber 16a serving as the top of the vertically provided cylinder 1 is an air layer for absorbing the expansion of the hydraulic oil above the two-dot chain line in FIG. The air in the air layer, which is much easier to compress than the hydraulic oil, first tries to be compressed by the forward movement of the piston.
【００１８】しかし、圧縮室１６aの上端は空気逃がし
弁１０で仕切られ、この弁の弁体８は空気中にあって作
動油の浮力を受けることなく保持爪９に載っているの
で、上記空気層の空気は、圧縮が殆んど進まないうちに
上記弁体８の側方を通過し,弁座６を抜けて上記空気層
の体積よりも広い上方の空気室３に流れ込む。従って、
ピストンの往動開始後直ちに、圧縮室１６aの空気が総
て空気室３に移り、作動油の油面が圧縮室１６aの上端
の第２ポートＰ2および空気逃がし弁１０の弁体８に達
し、弁体８が浮上して弁座６に着座して貫通穴５を閉じ
る。そして、空気室３への流入を阻止された作動油は、
この時点で開いている第１ポートＰ1からの第１の油路
１９を経てばね室１６bに流れ込み、ピストン１２は第
１の速度調整弁２５で設定された所定の第１速度で往動
する。ピストンの往動で第１ポートＰ1が閉ざされる
と、これに代わって第２ポートＰ2からの第２の油路２
０が開き、圧縮室１６aの作動油は、第２の油路２０を
経てばね室１６bに流れ込み、ピストン１２は第２の速
度調整弁２６で設定された所定の第２速度で往動する。
最後に、引戸３３が全閉すると、ピストン１２は上死点
(図２(Ａ)参照)に達して停止する。なお、空気室３に流
れ込んだ空気は、後の引戸開動に伴うピストン１２の復
動開始時に、油面の低下で弁座６から離れる弁体８によ
り開かれる貫通穴５を経て、再び圧縮室１６aに流入す
る。However, the upper end of the compression chamber 16a is partitioned by the air release valve 10, and the valve body 8 of the valve is in the air and rests on the holding claw 9 without receiving the buoyancy of the hydraulic oil. The air in the layer passes by the side of the valve body 8 before the compression proceeds substantially, and flows through the valve seat 6 into the upper air chamber 3 which is larger than the volume of the air layer. Therefore,
Piston forward start immediately after the air in the compression chamber 16a is all moved to the air chamber 3, the oil level of the hydraulic fluid reaches the valve body 8 of the second port P 2 and the air relief valve 10 at the upper end of the compression chamber 16a Then, the valve element 8 floats and sits on the valve seat 6 to close the through hole 5. Then, the hydraulic oil that has been prevented from flowing into the air chamber 3 is
It flows into the spring chamber 16b via the first oil passage 19 from the first port P 1 open at this time, the piston 12 moves forward at a predetermined first speed set by the first speed adjusting valve 25 . When the first port P 1 is closed by the piston of the forward movement, the second oil passage from the second port P 2 Instead of this 2
0 is opened, and the hydraulic oil in the compression chamber 16a flows into the spring chamber 16b through the second oil passage 20, and the piston 12 moves forward at a predetermined second speed set by the second speed adjustment valve 26.
Finally, when the sliding door 33 is fully closed, the piston 12 is at the top dead center.
(See FIG. 2A) and stop. The air that has flowed into the air chamber 3 passes through the through hole 5 opened by the valve body 8 that is separated from the valve seat 6 due to a decrease in the oil level when the piston 12 starts to move backward with the subsequent opening movement of the sliding door. 16a.
【００１９】こうして、垂設されたシリンダ１の頂部の
圧縮室１６aの上方に空気逃がし弁１０で仕切られた空
気室３を設けることによってピストン１２の往動(上昇)
行程の初期における従来のような空気層の圧縮がなくな
るからピストン１２の急速往動もなくなり、ピストン１
２は、ばね１７,１８のばね力および第１,第２の速度調
整弁２５,２６の設定値で定まる第１,第２の速度に制御
されて上死点まで往動し、ラックの往動,ピニオン２１
の図１中の矢印方向の回転,図３に示す開閉アーム３２
の下方への旋回により滑り金具３４を介して、引戸３３
が急速閉動することなく制御された所定速度で閉動す
る。以上の動作は、引戸３３が半開状態まで開かれ、ピ
ストン１２が上死点と下死点(図２(Ａ),(Ｂ)参照)の中
間まで復動した場合の引戸閉動に伴うピストンの往動に
ついても言え、引戸３３の開き寸法が少ない場合の急速
閉動もなくなるので、使用者に操作上の違和感や危険感
を与えることがなく、このドアクローザを用いた高級な
イメージを低下させることもない。Thus, by providing the air chamber 3 partitioned by the air release valve 10 above the compression chamber 16a at the top of the vertically provided cylinder 1, the piston 12 moves forward (up).
In the early stage of the stroke, the compression of the air layer as in the prior art is eliminated, so that the piston 12 does not move rapidly, and the piston 1
2 moves to the top dead center under control of the first and second speeds determined by the spring forces of the springs 17 and 18 and the set values of the first and second speed control valves 25 and 26, and moves forward and backward of the rack. Motion, pinion 21
Of the opening and closing arm 32 shown in FIG.
Of the sliding door 33 via the sliding bracket 34 by the downward turning of
Are closed at a controlled predetermined speed without rapid closing. The above operation is performed when the sliding door 33 is opened to the half-open state and the piston 12 is moved back to the middle between the top dead center and the bottom dead center (see FIGS. 2A and 2B). In the case of the forward movement, the rapid closing movement when the opening size of the sliding door 33 is small is also eliminated, so that the user does not feel uncomfortable or danger in operation, and lowers a high-grade image using the door closer. Not even.
【００２０】上記実施例では、空気逃がし弁１０を、円
形の仕切板４と,この中心の小径の弁座６および大径の
弁室７からなる貫通穴５と,弁室７内に遊嵌された樹脂
製で球状の弁体８で構成し、この空気逃がし弁１０を、
内部空間が空気室３をなすヘッドキャップ２の先端に嵌
装してシリンダ１の上端に液密に螺合しているので、構
造が簡素化し、保守,点検にも便利であるという利点が
ある。また、上記空気室３の体積を、使用温度範囲に対
応するシリンダ１内における作動油の膨張体積に略等し
くしているので、ピストン１２の往動(上昇)開始後直ち
に、圧縮室１６aの空気層を総て空気室３に移し、作動
油の油面を上端の第２ポートＰ2および弁体８に達せし
めることができ、ピストン往動開始時の空気層の圧縮お
よびピストンの急速往動を確実になくして、引戸３３を
確実に制御された所定速度で閉動させることができる。
さらに、上記実施例では、第１,第２の油路１９,２０を
設け、それらの速度調整弁２５,２６をシリンダ１の上
端面から調整できるようにしているので、引戸３３の閉
動速度を急緩２段に制御できるうえ、両速度の微調整が
容易にできるという利点がある。In the above embodiment, the air release valve 10 is loosely fitted into the circular partition plate 4, the through hole 5 formed by the small-diameter valve seat 6 and the large-diameter valve chamber 7 at the center thereof, and into the valve chamber 7. The air release valve 10 is constituted by a spherical resin body 8 made of
Since the internal space is fitted to the tip of the head cap 2 forming the air chamber 3 and screwed into the upper end of the cylinder 1 in a liquid-tight manner, there is an advantage that the structure is simplified and maintenance and inspection are convenient. . Further, since the volume of the air chamber 3 is substantially equal to the expansion volume of the hydraulic oil in the cylinder 1 corresponding to the operating temperature range, the air in the compression chamber 16a is immediately all the layers were transferred to the air chamber 3, the oil level of the hydraulic oil can be occupied reach the second port P 2 and the valve body 8 of the upper end, the compression and the piston of the piston forward at the start of the air layer rapidly forward And the sliding door 33 can be reliably closed at a controlled predetermined speed.
Further, in the above embodiment, the first and second oil passages 19 and 20 are provided so that their speed adjusting valves 25 and 26 can be adjusted from the upper end surface of the cylinder 1. Has the advantage that the speed can be controlled in two steps, and that both speeds can be finely adjusted.
【００２１】なお、本発明の空気逃がし弁は、実施例の
ものに限らず、作動油の浮力を受けて閉成するものであ
れば足り、また、本発明の空気室は、実施例のヘッドキ
ャップ式のものに限らず、その容積も、使用温度範囲に
対応する作動油の膨張体積に等しくなくともよい。ま
た、上記実施例では、ピストンの外周面に設けたラック
でピニオンを回転させるようにしたが、本発明は、ピス
トンの内周面にラックを設け、このラックでピニオンを
回転させるものにも適用できる。さらに、本発明のドア
クローザは、圧縮室を上にして垂設されるものである限
り、実施例の引戸に限らず引戸一般に適用することがで
きる。このような場合でも、請求項１に記載の空気室と
空気逃がし弁がある限り、上述の閉動初期の空気層圧縮
に伴う引戸の急速閉動が防止されることはいうまでもな
い。The air release valve of the present invention is not limited to the one in the embodiment, but may be any as long as it can be closed by receiving the buoyancy of the hydraulic oil. The volume is not limited to the cap type, and the volume may not be equal to the expansion volume of the hydraulic oil corresponding to the operating temperature range. Further, in the above embodiment, the pinion is rotated by the rack provided on the outer peripheral surface of the piston. However, the present invention is also applied to a device in which a rack is provided on the inner peripheral surface of the piston and the pinion is rotated by this rack. it can. Furthermore, the door closer of the present invention is not limited to the sliding door of the embodiment, and can be applied to sliding doors in general, as long as the door is vertically installed with the compression chamber facing upward. Even in such a case, it goes without saying that the rapid closing movement of the sliding door due to the compression of the air layer in the early stage of the closing movement is prevented as long as the air chamber and the air release valve described in claim 1 are provided.
【００２２】[0022]
【発明の効果】以上の説明で明らかなように、本発明の
引戸用ドアクローザは、頭部の貫通穴に逆止弁をもち,
側部または胴内にラックをもつピストンをシリンダに摺
動自在に嵌装し、ばね室側に縮装したばねでピストンを
圧縮室に向けて付勢し、上記ラックに噛合するピニオン
の軸をシリンダ壁に回転自在に支承するとともに、圧縮
室とばね室をシリンダ壁内の油路で連通してなるドアク
ローザを、圧縮室側を上にして垂設し、上記ピニオン軸
に一端を固定した開閉アームの他端を、引戸の縁に沿っ
て固定した滑り金具に摺動自在に嵌合したものにおい
て、上記油路の一端を、使用最高温度における圧縮室の
作動油面の直上に開口させる一方、この開口の上方に圧
縮室に連ねて空気室を設け、この空気室と圧縮室を仕切
るように作動油の浮力を受けて閉成する空気逃がし弁を
設けているので、ピストンの往動(上昇)開始から極短時
間のうちに圧縮室上部の空気を総て空気室に移すことが
でき、従来のような空気層の圧縮に伴うピストンの急速
往動をなくして、開き寸法が少ない場合でも引戸の閉動
を所定速度に制御することができるから、使用者に操作
上の違和感や危険感を与えず、コンパクトな構造と円滑
な動作によりイメージを高めつつ高級建築物や車輌等に
広く適用することができる。As is clear from the above description, the sliding door closer of the present invention has a check valve in the through hole in the head,
A piston having a rack at the side or inside the body is slidably fitted to the cylinder, and the piston is urged toward the compression chamber by a spring compressed toward the spring chamber, so that the pinion shaft meshing with the rack is engaged. A door closer that rotatably supports the cylinder wall and connects the compression chamber and the spring chamber via an oil passage in the cylinder wall, is vertically installed with the compression chamber side facing up, and one end is fixed to the pinion shaft. The other end of the arm is slidably fitted to a slide fitting fixed along the edge of the sliding door, and one end of the oil passage is opened directly above the hydraulic oil surface of the compression chamber at the highest use temperature. An air chamber is provided above the opening in communication with the compression chamber, and an air release valve is provided to close the chamber by receiving the buoyancy of hydraulic oil so as to separate the air chamber and the compression chamber. Rise) in the compression chamber within a very short time from the start All of the air can be transferred to the air chamber, eliminating the rapid forward movement of the piston accompanying the compression of the air layer as in the past, and controlling the closing movement of the sliding door to a predetermined speed even when the opening size is small. Therefore, the present invention can be widely applied to high-end buildings and vehicles while giving a user a sense of incongruity or danger in operation, enhancing the image with a compact structure and smooth operation.
【００２３】また、空気逃がし弁を、円形の仕切板と,
この中心の小径の弁座および大径の弁室からなる貫通穴
と,弁室内に遊嵌され,作動油に浸ったときに弁座に着座
する球状の弁体で構成すれば、構造が簡素化し、保守,
点検に便利である。さらに、空気室の体積を、使用温度
範囲に対応するシリンダ内における作動油の膨張体積に
略等しくすれば、ピストンの往動開始後直ちに、圧縮室
の空気を総て空気室に移し、作動油の油面を上端の油路
の開口に達せしめることができ、空気層の圧縮に伴うピ
ストンの急速往動を確実になくして、引戸を確実に所定
速度に制御することができる。Further, the air release valve is provided with a circular partition plate,
The structure is simple if it is composed of a through hole consisting of a small-diameter valve seat and a large-diameter valve chamber at the center, and a spherical valve element that is loosely fitted in the valve chamber and sits on the valve seat when immersed in hydraulic oil. And maintenance,
It is convenient for inspection. Furthermore, if the volume of the air chamber is made substantially equal to the expansion volume of the hydraulic oil in the cylinder corresponding to the operating temperature range, immediately after the piston starts moving forward, all the air in the compression chamber is transferred to the air chamber, The oil level can reach the opening of the oil passage at the upper end, the rapid forward movement of the piston accompanying the compression of the air layer can be reliably eliminated, and the sliding door can be reliably controlled at the predetermined speed.
【図１】 本発明の引戸用ドアクローザの一実施例を示
す縦断面図である。FIG. 1 is a longitudinal sectional view showing an embodiment of a door closer for a sliding door of the present invention.
【図２】 従来の引戸用ドアクローザの引戸全閉,全開
状態における縦断面図である。FIG. 2 is a vertical sectional view of a conventional sliding door door closer in a fully closed and fully opened state;
【図３】 上記引戸用ドアクローザの引戸との連結状態
を示す正面図である。FIG. 3 is a front view showing a connection state of the sliding door closer with a sliding door.
１…シリンダ、２…ヘッドキャップ、３…空気室、４…
仕切板、５…貫通穴、６…弁座、７…弁室、８…弁体、
９…保持爪、１０…空気逃がし弁、１２…ピストン、１
２a…頭部、１２b…側部、１３…貫通穴、１４…逆止
弁、１５…ラック、１６…油室、１６a…圧縮室、１６b
…ばね室、１７,１８…ばね、１９…第１の油路、２０
…第２の油路、２１…ピニオン、２２…軸、２３…環状
溝、２４…径方向の貫通穴、３０…パッキン、３２…開
閉アーム、３３…引戸、３４…滑り金具。1 ... cylinder, 2 ... head cap, 3 ... air chamber, 4 ...
Partition plate, 5: through hole, 6: valve seat, 7: valve chamber, 8: valve body,
9: holding claw, 10: air release valve, 12: piston, 1
2a: head, 12b: side, 13: through hole, 14: check valve, 15: rack, 16: oil chamber, 16a: compression chamber, 16b
... spring chamber, 17, 18 ... spring, 19 ... first oil passage, 20
.. 2nd oil passage, 21 ... pinion, 22 ... shaft, 23 ... annular groove, 24 ... radial through hole, 30 ... packing, 32 ... opening / closing arm, 33 ... sliding door, 34 ... sliding fitting.
フロントページの続き (56)参考文献 実開 昭60−40676（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) E05F 3/10 E05F 1/16 E05F 3/04 E05F 3/12 Continuation of the front page (56) References JP-A-60-40676 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) E05F 3/10 E05F 1/16 E05F 3/04 E05F 3 / 12
Claims (3)
逆止弁を有し、側部または胴内にラックを有するピスト
ンをシリンダ内の油室に摺動自在に嵌装し、このピスト
ンで区切られる他方の油室に上記ピストンを一方の油室
端まで付勢するばねを縮装するとともに、シリンダ壁内
に上記一方の油室を他方の油室に連通する油路を設ける
一方、上記ラックに噛合するピニオンの軸をシリンダ壁
に回転自在に支承してなり、上記一方の油室を上にして
垂設されるドアクローザと、このドアクローザの上記ピ
ニオンの軸に一端を固定し、引戸の縁に沿って固定され
た滑り金具に他端を摺動自在に嵌合した開閉アームで構
成される引戸用ドアクローザにおいて、 上記油路は、使用最高温度における垂設されたシリンダ
の上記一方の油室の作動油面の直上に一端が開口すると
ともに、この開口の上方に上記一方の油室に連ねてシリ
ンダ内に設けられた空気室と、この空気室と一方の油室
を仕切るように設けられ、作動油の浮力を受けて閉成す
る空気逃がし弁とを備えたことを特徴とする引戸用ドア
クローザ。1. A piston having a check valve for preventing inflow of hydraulic oil into a through hole in a head, and a piston having a rack on a side or a body is slidably fitted in an oil chamber in a cylinder. A spring for urging the piston to one oil chamber end is compressed in the other oil chamber partitioned by the piston, and an oil path is provided in the cylinder wall to connect the one oil chamber to the other oil chamber. On the other hand, a shaft of a pinion that meshes with the rack is rotatably supported on a cylinder wall, and one end is fixed to a door closer suspended with the one oil chamber facing upward, and the pinion shaft of the door closer. A sliding door fixed to the sliding door fixed along the edge of the sliding door, the other end of which is slidably fitted with an opening / closing arm, wherein the oil passage is a cylinder of a vertically mounted cylinder at a maximum operating temperature. The hydraulic oil level in one oil chamber One end is opened, and an air chamber provided in the cylinder above the opening and connected to the one oil chamber, and provided so as to partition the air chamber and the one oil chamber, thereby increasing the buoyancy of the hydraulic oil. A door closer for a sliding door, comprising an air release valve that receives and closes the door.
この仕切板の中心に、上記一方の油室側が大径の弁室を
なし,上記空気室側が小径の弁座をなすように設けられ
た貫通穴と、作動油に浸ったときに上記弁座の着座する
ように上記弁室に遊嵌された球状の弁体からなる請求項
１に記載の引戸用ドアクローザ。2. The air release valve comprises a circular partition plate,
In the center of the partition plate, the one oil chamber side forms a large-diameter valve chamber, and the air chamber side forms a small-diameter valve seat. The door closer for sliding doors according to claim 1, comprising a spherical valve element loosely fitted in said valve chamber so as to be seated.
シリンダ内における作動油の膨張体積に略等しい体積を
有する請求項１または２に記載の引戸用ドアクローザ。3. The sliding door closer according to claim 1, wherein the air chamber has a volume substantially equal to the expansion volume of the hydraulic oil in the cylinder corresponding to the operating temperature range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14155494A JP3169305B2 (en) | 1994-06-23 | 1994-06-23 | Sliding door closer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14155494A JP3169305B2 (en) | 1994-06-23 | 1994-06-23 | Sliding door closer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0813898A JPH0813898A (en) | 1996-01-16 |
| JP3169305B2 true JP3169305B2 (en) | 2001-05-21 |
Family
ID=15294673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14155494A Expired - Fee Related JP3169305B2 (en) | 1994-06-23 | 1994-06-23 | Sliding door closer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3169305B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511538B (en) * | 2013-10-11 | 2015-09-16 | 浙江正星健身器有限公司 | Torsional oil cylinder |
| KR102019588B1 (en) * | 2018-01-22 | 2019-09-09 | 김경태 | Door closer |
-
1994
- 1994-06-23 JP JP14155494A patent/JP3169305B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0813898A (en) | 1996-01-16 |
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