JP2008196256A - Door closer - Google Patents

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Publication number
JP2008196256A
JP2008196256A JP2007034512A JP2007034512A JP2008196256A JP 2008196256 A JP2008196256 A JP 2008196256A JP 2007034512 A JP2007034512 A JP 2007034512A JP 2007034512 A JP2007034512 A JP 2007034512A JP 2008196256 A JP2008196256 A JP 2008196256A
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Prior art keywords
piston
door
oil storage
cylinder
oil
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JP2007034512A
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Inventor
Masashi Okada
正志 岡田
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Nitto Kohki Co Ltd
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Nitto Kohki Co Ltd
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Priority to JP2007034512A priority Critical patent/JP2008196256A/en
Priority to EP07832291A priority patent/EP2119860A1/en
Priority to KR1020097016974A priority patent/KR20090110912A/en
Priority to PCT/JP2007/072561 priority patent/WO2008099546A1/en
Priority to CN200780052318A priority patent/CN101641486A/en
Publication of JP2008196256A publication Critical patent/JP2008196256A/en
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/20—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices in hinges
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/12—Mechanisms in the shape of hinges or pivots, operated by springs
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/08—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes in which a torsion spring rotates a member around an axis arranged in the direction of the axis of the piston
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/1008—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring parallel with the pivot axis
    • E05F1/1016—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring parallel with the pivot axis with a canted-coil torsion spring
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/12—Mechanisms in the shape of hinges or pivots, operated by springs
    • E05F1/1207—Mechanisms in the shape of hinges or pivots, operated by springs with a coil spring parallel with the pivot axis
    • E05F1/1215—Mechanisms in the shape of hinges or pivots, operated by springs with a coil spring parallel with the pivot axis with a canted-coil torsion spring
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors

Landscapes

  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door closer which can reduce the change of a closing time of a door caused by the change of the ambient temperature, and can prevent a piston and a casing from being damaged when the door is closed. <P>SOLUTION: The door closer 10 fitted along an axis line of rotation of the door D includes a closing direction urging part 12 urging the door D to the closed position, and a speed regulating part 14 regulating a returning speed of the door D. The speed regulating part 14 comprises a cylindrical casing 11, a piston 34 interlocking with opening/closing movements of the door D in the casing 11, and an oil container 26 containing the oil (a buffer) P. The piston 34 is arranged to be movable up and down by screw-engagement with a cylinder 24 so that it may move up and down while receiving a braking force applied by the oil contained in the oil container 26. Viscosity of the oil to be used is what is insusceptible to the changes of temperature. A compression spring (an elastic member) 38 pressing the piston 34 to an end of the moving direction is mounted on the oil container 26. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、油圧による制動機構を備えたドアクローザに関する。   The present invention relates to a door closer having a hydraulic braking mechanism.

特許文献１には、戻りばねの付勢力によりドアの閉じ動作を行うとともに、急激な閉じ動作を防止すべくケーシング内に油圧による制動機構を備えたドアクローザが開示されている。かかる制動機構にはドアの開閉動作に連動するピストンが設けられており、ケーシング内周に配置したシリンダとのねじ係合により、ピストンが上下動するようになっている。そして、上下動するピストンがケーシング内に充填されたオイル（緩衝剤）の制動力を受けることでドアがゆっくりと閉じるようになっている。尚、図４に拡大して示すように、ピストン１３４には上部油収納部１２６ｂと下部油収納部１２６ａとの間のオイルの移動を許容する流体通路１３６ａが設けられると共に、流体通路内を移動するオイル量を調整する調整棒（調整手段）１２８が設けられている。
特開２００６−１６１４５２号 Patent Literature 1 discloses a door closer that performs a door closing operation by a biasing force of a return spring and includes a hydraulic braking mechanism in a casing to prevent a sudden closing operation. Such a brake mechanism is provided with a piston interlocking with the opening / closing operation of the door, and the piston moves up and down by screw engagement with a cylinder disposed on the inner periphery of the casing. Then, the piston that moves up and down receives the braking force of the oil (buffering agent) filled in the casing so that the door is slowly closed. 4, the piston 134 is provided with a fluid passage 136a that allows movement of oil between the upper oil storage portion 126b and the lower oil storage portion 126a, and moves in the fluid passage. An adjustment rod (adjustment means) 128 for adjusting the amount of oil to be provided is provided.
JP 2006-161452 A

しかし、特許文献１に記載の従来技術は、オイルに鉱物油を用いているので、温度変化による粘度変化が大きく、環境温度が変化するごとに調整棒１２８を操作して流体通路１３６aを移動するオイル量を調整する必要がある。   However, since the prior art described in Patent Document 1 uses mineral oil as the oil, the viscosity change due to the temperature change is large, and the adjustment rod 128 is operated to move through the fluid passage 136a each time the environmental temperature changes. It is necessary to adjust the amount of oil.

また、ケーシング１１１の内周（シリンダ）に形成されたねじ溝１２５と、ピストン１３４の外周面に形成されたねじ山１３５との間にはピストン１３４の移動をスムーズにするため所定のバックラッシが設けられているので、ドアを閉じる際に、戻りばねの付勢力によって、ピストンとシリンダとの間のねじのバックラッシ間で、ねじ山１３５の下側縁部１３５ｂとねじ溝１２５の下側縁部１２５ｂとがぶつかりあい、ピストン及びケーシングの内周が損傷するおそれがある。   In addition, a predetermined backlash is provided between the screw groove 125 formed on the inner periphery (cylinder) of the casing 111 and the screw thread 135 formed on the outer peripheral surface of the piston 134 in order to make the piston 134 move smoothly. Therefore, when the door is closed, the lower edge 135b of the thread 135 and the lower edge 125b of the screw groove 125 between the backlashes of the screw between the piston and the cylinder due to the biasing force of the return spring. There is a risk that the inner circumference of the piston and casing may be damaged.

更に、ドアを勢い良く開く際にも、ピストンとシリンダとの間のねじのバックラッシ間で、ねじ山１３５の上側縁部（一側縁部）１３５ａとねじ溝１２５の上側縁部（一側縁部）１２５ａとがぶつかりあい、ピストン及びケーシングの内周が損傷するおそれがある。   Further, when the door is opened with force, the upper edge (one side edge) 135a of the screw thread 135 and the upper edge (one side edge) of the screw groove 125 between the backlashes of the screw between the piston and the cylinder. Part) 125a may collide, and the inner circumference of the piston and casing may be damaged.

本発明は、環境温度変化に対するドアの閉じ時間の変化を容易に低減できると共にドアを開閉する際ピストン及びケーシングが損傷するのを防止できるドアクローザを提供することを目的とする。   An object of the present invention is to provide a door closer that can easily reduce a change in the closing time of the door with respect to a change in environmental temperature and can prevent the piston and casing from being damaged when the door is opened and closed.

すなわち、本発明は、ドアの回転軸線に沿って取り付けられるドアクローザであって、
ドアを閉じ位置に向けて付勢する閉じ位置方向付勢部と、閉じ位置に向けて移動するドアの戻り速度を調整する速度調整部とを備え、
速度調整部は筒状のシリンダと、シリンダ内に形成され且つ緩衝剤が収納される油収納部と、油収納部内でドアの開閉に連動して移動するピストンとを備え、
油収納部はピストンの上部側に形成された上部油収納部と、ピストンの下端側に形成された下部油収納部とを有し、
ピストンはシリンダとの間でネジ係合により移動自在に配置しており、且つ油収納部内に収納された緩衝剤により制動を受けつつ移動するようになっており、ピストンには上部油収納部と下部油収納部との間の緩衝剤の移動を許容する流体通路と、流体通路内を通過する緩衝剤の量を調整する調整手段とが設けられており、
緩衝剤は粘度の温度による変化が小さいものであり、
油収納部にはピストンを移動方向の一端側に向けて押圧する弾性部材を設けており、
弾性部材の付勢力によってピストンの外周面に形成したねじ山の一側縁部が、シリンダの内周に形成したねじ溝の一側縁部に押し付けられていることを特徴とする。 That is, the present invention is a door closer attached along the rotational axis of the door,
A closing position direction urging unit that urges the door toward the closing position, and a speed adjustment unit that adjusts the return speed of the door that moves toward the closing position,
The speed adjustment unit includes a cylindrical cylinder, an oil storage unit that is formed in the cylinder and stores a buffer, and a piston that moves in conjunction with opening and closing of the door in the oil storage unit,
The oil storage part has an upper oil storage part formed on the upper side of the piston, and a lower oil storage part formed on the lower end side of the piston,
The piston is movably arranged by screw engagement with the cylinder, and is moved while being braked by a buffer stored in the oil storage portion. The piston has an upper oil storage portion and A fluid passage allowing movement of the buffer between the lower oil storage portion and an adjusting means for adjusting the amount of the buffer passing through the fluid passage are provided;
Buffering agents are small changes in viscosity with temperature,
The oil storage part is provided with an elastic member that presses the piston toward one end in the moving direction,
One side edge part of the thread formed on the outer peripheral surface of the piston by the urging force of the elastic member is pressed against one side edge part of the thread groove formed on the inner periphery of the cylinder.

このドアクローザにおいては、油収納部にはピストンを移動方向の一端側に向けて押圧する弾性部材を設けてピストンの外周面に形成したねじ山の一側縁部が、シリンダの内周に形成したねじ溝の一側縁部に押し付けられているので、ドアが開き位置から閉じ位置に向けて移動し始めるときに、付勢力によってシリンダには大きな力が働くが、ピストンに形成したねじ山の一側縁部とシリンダに形成したねじ溝の一側縁部とがぶつかることを防止でき、ピストン及びシリンダが損傷するのを防止できる。   In this door closer, an elastic member that presses the piston toward one end in the moving direction is provided in the oil storage portion, and one side edge portion of the thread formed on the outer peripheral surface of the piston is formed on the inner periphery of the cylinder. Since it is pressed against one side edge of the thread groove, when the door starts to move from the open position to the closed position, a large force acts on the cylinder by the biasing force, but one of the threads formed on the piston. It can prevent that a side edge part and the one side edge part of the thread groove formed in the cylinder collide, and can prevent that a piston and a cylinder are damaged.

また、閉じ位置から開き位置に向けてドアが移動する際にシリンダにねじ係合して移動するピストンは、そのねじ山の一側縁部が、弾性部材の押圧力によってねじ溝の一側縁部に押し付けられながら移動するようになる。また、ドアが開き位置から閉じ位置に向けて移動する際に、弾性部材によってピストンの外周面に形成したねじ山の一側縁部が、シリンダの内周に形成したねじ溝の一側縁部に押し付けられているので、ピストンのねじ山の一側縁部とシリンダのねじ溝の一側縁部とがぶつかることを防止でき、ピストン及びケーシング（シリンダ）が損傷するのを防止できる。   In addition, when the door moves from the closed position to the open position, the piston that moves by screw engagement with the cylinder has one side edge of the thread at one side edge of the thread groove by the pressing force of the elastic member. It moves while being pressed against the part. Also, when the door moves from the open position to the closed position, one side edge of the thread formed on the outer peripheral surface of the piston by the elastic member is one side edge of the screw groove formed on the inner periphery of the cylinder. Therefore, it is possible to prevent the one side edge of the thread of the piston and the one side edge of the thread groove of the cylinder from colliding with each other, and it is possible to prevent the piston and the casing (cylinder) from being damaged.

また、粘度の温度による変化が小さい緩衝剤を用いることで、環境温度が変化するごとに調整棒を操作して流体通路を移動する緩衝剤の量を調整する必要がない。 In addition, by using a buffer that has a small change in viscosity due to temperature, there is no need to adjust the amount of the buffer that moves through the fluid passage by operating the adjusting rod each time the environmental temperature changes.

また、緩衝剤はシリコーンオイルであることが好ましい。 The buffer is preferably silicone oil.

更に、シリコーンオイルには潤滑剤を添加してあることが好ましい。 Furthermore, it is preferable to add a lubricant to the silicone oil.

このように、シリコーンオイルに潤滑剤を添加してあるので、ピストンのねじ山の一側縁部とシリンダのねじ溝の一側縁部とが摺動する際の耐摩耗性を向上させることができる。   Thus, since the lubricant is added to the silicone oil, it is possible to improve the wear resistance when the one side edge of the piston thread and the one side edge of the cylinder thread groove slide. it can.

更に、弾性部材は、下部油収納部に配置した圧縮スプリングであり、
閉じ位置方向付勢部には、床に固定されるシャフトが設けられており、
シャフトの上部には直径が拡大した拡径部が設けられており、拡径部にはシャフトと同軸の円筒状の凹溝が形成されており、
拡径部の外周面とシリンダとの間を密着固定して、油収納部に収納された緩衝剤が油収納部から外部に漏れるのを防止しており、拡径部の上端位置が調整手段のほぼ下端位置まで延びて、拡径部の外周面とシリンダとの間の密着部分の面積を広くしており、凹溝内に圧縮スプリングの下部を収納していることを特徴とする。 Furthermore, the elastic member is a compression spring disposed in the lower oil storage portion,
The closed position direction biasing part is provided with a shaft fixed to the floor,
The upper part of the shaft is provided with an enlarged diameter part having an enlarged diameter, and the enlarged diameter part is formed with a cylindrical concave groove coaxial with the shaft.
The outer peripheral surface of the enlarged diameter part and the cylinder are closely fixed to prevent the buffer stored in the oil accommodating part from leaking outside from the oil accommodating part, and the upper end position of the enlarged diameter part is the adjusting means. The area of the contact portion between the outer peripheral surface of the enlarged diameter portion and the cylinder is widened, and the lower portion of the compression spring is housed in the groove.

このように、拡径部の上端位置が調整棒のほぼ下端位置まで延びて拡径部の外周面とシリンダとの間の密着部分の面積を広くしているので、油収納部に収納された緩衝剤が油収納部から外部に漏れるのを防止できると共に、拡径部の内周に凹溝を形成することで別途スペースを設けることなく下部油収納部の容積を大きくできる。さらに、この凹溝に圧縮スプリングの下部を収納するので、別途にスプリングの取り付け座を設けることなく、圧縮スプリングのすわりを良くできる。
下部油収納部内に圧縮スプリングを入れるだけで良いので、組み立てが簡単である。 In this way, the upper end position of the enlarged diameter portion extends almost to the lower end position of the adjustment rod, and the area of the close contact portion between the outer peripheral surface of the enlarged diameter portion and the cylinder is widened. The buffer agent can be prevented from leaking out from the oil storage part, and the volume of the lower oil storage part can be increased without providing a separate space by forming a concave groove on the inner periphery of the enlarged diameter part. Further, since the lower part of the compression spring is housed in the concave groove, it is possible to improve the sitting of the compression spring without separately providing a spring mounting seat.
Since it is only necessary to put a compression spring in the lower oil storage part, assembly is easy.

以下、本発明に係るドアクローザの実施形態を添付図面に基づき説明する。まず、図１及び図２を用いて第１実施形態について説明する。
本発明の第１実施形態に係るドアクローザ１０は、中心吊タイプであり、略円筒状のケーシング１１内にドアＤを閉じ位置に向けて付勢する閉じ位置方向付勢部１２と、ドアＤの戻り速度を調整する速度調整部１４とを備える。尚、本発明ではドアDとして防火用扉を用いている。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a door closer according to the present invention will be described with reference to the accompanying drawings. First, the first embodiment will be described with reference to FIGS. 1 and 2.
The door closer 10 according to the first embodiment of the present invention is a center suspension type, and a closed position direction urging portion 12 that urges the door D toward a closed position in a substantially cylindrical casing 11 and a door D. And a speed adjustment unit 14 for adjusting the return speed. In the present invention, a fire door is used as the door D.

閉じ位置方向付勢部１２は、その下部に設けたドアＤの取り付け部１６と、床Ｇに設けられた受座Ｓに挿入固定される支持脚部１８と、支持脚部１８に固定されたシャフト２０と、シャフト２０の外周面とケーシング１１の内周面との間に配置したコイルばね２２とを備えている。コイルばね２２の下端部はシャフト２０に固定されており、上端部はケーシング１１に固定されたスプリング座２３に取り付けられたセットピン２７に係止されている。シャフト２０の上部には直径が拡大した拡径部２０aが設けられており、拡径部２０ａにはシャフト２０と同軸の円筒状の凹溝２０ｂが形成されている。   The closed position direction biasing portion 12 is fixed to the attachment portion 16 of the door D provided at the lower portion thereof, the support leg portion 18 inserted and fixed to the seat S provided on the floor G, and the support leg portion 18. A shaft 20 and a coil spring 22 disposed between the outer peripheral surface of the shaft 20 and the inner peripheral surface of the casing 11 are provided. The lower end portion of the coil spring 22 is fixed to the shaft 20, and the upper end portion is locked to a set pin 27 attached to a spring seat 23 fixed to the casing 11. An enlarged portion 20a having an enlarged diameter is provided on the upper portion of the shaft 20, and a cylindrical concave groove 20b coaxial with the shaft 20 is formed in the enlarged portion 20a.

拡径部２０ａの外周面２０ｃと内筒２４との間は蝋付けにより密着固定しており、密着部分の面積を広くとるために、拡径部２０ａの上端位置が調整棒２８のほぼ下端位置まで延びている。拡径部２０ａの外周面２０ｃと内筒２４との間を蝋付け固定することで、油収納部２６に収納されたダンパーオイルが油収納部２６から外部に漏れるのを防止している。   The outer peripheral surface 20c of the enlarged diameter portion 20a and the inner cylinder 24 are closely fixed by brazing, and the upper end position of the enlarged diameter portion 20a is substantially the lower end position of the adjusting rod 28 in order to increase the area of the closely contacted portion. It extends to. By brazing and fixing between the outer peripheral surface 20c of the enlarged diameter portion 20a and the inner cylinder 24, the damper oil stored in the oil storage portion 26 is prevented from leaking from the oil storage portion 26 to the outside.

速度調整部１４は、ケーシング１１の内周面に密接して設けられダンパーオイル（緩衝剤）Ｐを収納する油収納部２６を画定する内筒（シリンダ）２４と、油収納部２６内を上下動するピストン３４と、後述の調整棒２８が設置される挿通孔３２を有する調整棒設置部３０とを有している。調整棒設置部３０はピストン３４に対してスプライン結合している。そして、ピストン３４は調整棒設置部３０に対して相対的に回転しないようになっているが、ピストン３４は調整棒設置部３０に対して相対的に上下動自在になっている。   The speed adjusting unit 14 is provided in close contact with the inner peripheral surface of the casing 11, and an inner cylinder (cylinder) 24 that defines an oil storage unit 26 that stores damper oil (buffering agent) P. It has a moving piston 34 and an adjusting rod installation portion 30 having an insertion hole 32 in which an adjustment rod 28 described later is installed. The adjusting rod installation portion 30 is splined to the piston 34. The piston 34 does not rotate relative to the adjustment rod installation portion 30, but the piston 34 can move up and down relatively with respect to the adjustment rod installation portion 30.

油収納部２６はピストン３４によって上下に区画されており、油収納部２６はピストン３４の下方に形成される下部油収納部（高圧室）２６aと、ピストン３４の上方に形成される上部油収納部（低圧室）２６ｂとを備える。 The oil storage section 26 is divided vertically by a piston 34, and the oil storage section 26 includes a lower oil storage section (high pressure chamber) 26 a formed below the piston 34 and an upper oil storage formed above the piston 34. Part (low pressure chamber) 26b.

ピストン３４は内筒２４との間でねじ係合しており、ピストン３４の外周に形成されたねじ山３５が内筒２４に形成されたねじ溝２５に沿って螺旋状に移動することで、ピストン３４が油収納部２６内を上下動するようになっている（図２）。また、ねじ山３５とねじ溝２５との間は所定間隔の遊びが形成されている。 The piston 34 is screw-engaged with the inner cylinder 24, and the screw thread 35 formed on the outer periphery of the piston 34 moves spirally along the screw groove 25 formed in the inner cylinder 24, The piston 34 moves up and down in the oil storage part 26 (FIG. 2). Further, a play of a predetermined interval is formed between the screw thread 35 and the screw groove 25.

ピストン３４の下端部には油収納部２６内でのダンパーオイルＰの移動を調整する調整弁３６が設けられており、調整弁（流体通路）３６は円筒状の第１調整部３６aと逆止弁付の第２調整部３６ｂとを備えている。第１調整部３６aはピストン３４の上昇（ドアDの閉じ動作時）に伴うダンパーオイルＰの下部油収納部２６aから上部油収納部２６ｂに向けての移動量を調整している。第２調整部３６ｂは、逆止弁によりピストン３４の下降時にダンパーオイルＰが下部油収納部２６aから上部油収納部２６ｂに向けて移動するのを防止すると共に、ピストン３４の上昇時にダンパーオイルＰが上部油収納部２６ｂから下部油収納部２６aに向けて移動できるようにしている。 An adjustment valve 36 for adjusting the movement of the damper oil P in the oil storage portion 26 is provided at the lower end portion of the piston 34, and the adjustment valve (fluid passage) 36 is a check with the cylindrical first adjustment portion 36a. And a second adjusting portion 36b with a valve. The first adjustment unit 36a adjusts the amount of movement of the damper oil P from the lower oil storage part 26a toward the upper oil storage part 26b as the piston 34 rises (when the door D is closed). The second adjusting portion 36b prevents the damper oil P from moving from the lower oil storage portion 26a toward the upper oil storage portion 26b when the piston 34 is lowered by the check valve, and the damper oil P when the piston 34 is raised. Is movable from the upper oil storage portion 26b toward the lower oil storage portion 26a.

調整棒２８は下端部に向けて直径が次第に大きくなるテーパ状を成しており、上部に設けられた調整つまみ２８aの操作によって調整棒２８が上下動し、調整棒２８のテーパ部分と第１調整部３６aの間で形成される隙間を調整することで、ダンパーオイルＰの移動量を調整できるようになっている。尚、本実施の形態では、調整棒２８の操作はドアＤの設置時のみに行えば良く、環境温度が変化するたびに操作する必要はない。   The adjustment rod 28 has a taper shape with a diameter gradually increasing toward the lower end, and the adjustment rod 28 is moved up and down by the operation of the adjustment knob 28a provided on the upper portion. The amount of movement of the damper oil P can be adjusted by adjusting the gap formed between the adjusting portions 36a. In the present embodiment, the adjustment rod 28 may be operated only when the door D is installed, and does not need to be operated every time the environmental temperature changes.

ダンパーオイルＰはシリコーンオイルに所定の潤滑剤を添加したものを使用している。
下部油収納部２６aには圧縮スプリング（弾性部材）３８を設けており、その下部がシャフト２０の凹溝２０ｂ内に収納され且つ下端が凹溝２０ｂの底部に当接し、上端がピストン３４の下端部に当接している。尚、圧縮スプリング３８はドアＤが開き位置にあるとき、ピストン３４のねじ山３５の上側縁部３５aが、内筒２４のねじ溝２５の上側縁部２５aを押圧するような強さ（押圧力）であることが好ましい。 As the damper oil P, a silicone oil added with a predetermined lubricant is used.
The lower oil storage portion 26a is provided with a compression spring (elastic member) 38, the lower portion of which is stored in the concave groove 20b of the shaft 20, the lower end abuts on the bottom of the concave groove 20b, and the upper end is the lower end of the piston 34. It is in contact with the part. The compression spring 38 has such a strength (pressing force that the upper edge 35a of the thread 35 of the piston 34 presses the upper edge 25a of the thread groove 25 of the inner cylinder 24 when the door D is in the open position. ) Is preferable.

次に本実施の形態に係るドアクローザの作用について説明する。閉じ位置の状態（図１（a）に示す）からドアＤを開き位置（図１（ｂ）に示す）に向けて開くと、ドアＤの取り付け部１６に連動して動くピストン３４が回動して、ピストン３４の外周に形成されたねじ山３５が内筒２４に形成したねじ溝２５に沿って螺旋状に移動し、ピストン３４が油収納部２６内を上昇する。このとき、閉じ位置方向付勢部１２内のコイルばね２２はシャフト２０の軸回り方向にねじられることで、コイルばね２２に所定の付勢力が付与される。また、下部油収納部２６a内に設けた圧縮スプリング３８の押圧力により、ピストン３４の外周面に形成したねじ山３５の上側縁部（一側縁部）３５aが、内筒２４に形成したねじ溝２５の上側縁部（一側縁部）２５aに常に押圧された状態でピストン３４が上昇する。尚、このときダンパーオイルＰが第２調整部３６ｂを通過して上部油収納部２６ｂから下部油収納部２６aに向けて移動する。 Next, the operation of the door closer according to the present embodiment will be described. When the door D is opened from the closed position (shown in FIG. 1 (a)) toward the open position (shown in FIG. 1 (b)), the piston 34 that moves in conjunction with the mounting portion 16 of the door D rotates. Then, the thread 35 formed on the outer periphery of the piston 34 moves spirally along the thread groove 25 formed in the inner cylinder 24, and the piston 34 moves up in the oil storage portion 26. At this time, the coil spring 22 in the closing position direction biasing portion 12 is twisted in the direction around the shaft 20, whereby a predetermined biasing force is applied to the coil spring 22. Further, the upper edge (one side edge) 35a of the thread 35 formed on the outer peripheral surface of the piston 34 by the pressing force of the compression spring 38 provided in the lower oil storage portion 26a is a screw formed on the inner cylinder 24. The piston 34 ascends while being always pressed by the upper edge (one side edge) 25a of the groove 25. At this time, the damper oil P passes through the second adjustment portion 36b and moves from the upper oil storage portion 26b toward the lower oil storage portion 26a.

ドアＤが閉じ位置から開き位置に向けて移動する際（瞬間）に、ドアＤを開く力によって内筒２４には上方向に大きな力が働くが、ピストン３４のねじ山３５の上側縁部３５aが、内筒２４のねじ溝２５の上側縁部２５aに押圧されているので、ピストン３４に形成したねじ山３５の上側縁部３５aと内筒２４に形成したねじ溝２５の上側縁部２５aとがぶつかることを防止でき、ピストン３４及び内筒２４が損傷するのを防止できる。 When the door D moves from the closed position toward the open position (instant), a large force is exerted on the inner cylinder 24 due to the force to open the door D, but the upper edge 35a of the thread 35 of the piston 34. Are pressed against the upper edge 25a of the thread groove 25 of the inner cylinder 24, and therefore, the upper edge 35a of the thread 35 formed on the piston 34 and the upper edge 25a of the screw groove 25 formed on the inner cylinder 24, Can be prevented, and the piston 34 and the inner cylinder 24 can be prevented from being damaged.

一方、ドアＤを閉じるときには、所定の付勢力が付与されたコイルばね２２の復元力によりドアＤの取り付け部１６と連動して動くピストン３４が開き動作時と逆方向に回動し、ドアＤは閉じ位置に向けて移動する。このとき、ピストン３４の外周に形成されたねじ山３５が内筒２４に形成したねじ溝２５に沿って螺旋状に移動して、ピストン３４は油収納部２６内を下降する。 On the other hand, when the door D is closed, the piston 34 that moves in conjunction with the mounting portion 16 of the door D is rotated by the restoring force of the coil spring 22 to which a predetermined urging force is applied. Moves towards the closed position. At this time, the screw thread 35 formed on the outer periphery of the piston 34 moves spirally along the screw groove 25 formed in the inner cylinder 24, and the piston 34 descends in the oil storage portion 26.

また、下部油収納部２６a内に設けた圧縮スプリング３８の押圧力により、ピストン３４の外周面に形成したねじ山３５の上側縁部３５aが、内筒２４の内周に形成したねじ溝２５の上側縁部２５aに常に押圧された状態でピストン３４が下降する。また、ピストン３４が油収納部２６内を下降する際、調整棒２８のテーパ部分と第１調整部３６aの間で形成される隙間を流れるダンパーオイルＰの抵抗によってピストン３４の下降速度を調整する。ドアＤが開き位置から閉じ位置に向けて移動し始める瞬間に、ピストン３４のねじ山３５の上側縁部３５aが、内筒２４のねじ溝２５の上側縁部２５aに押し付けられているので、ピストン３４に形成したねじ山３５の下側縁部３５ｂと内筒２４に形成したねじ溝２５の下側縁部２５ｂとがぶつかることを防止でき、ピストン３４及びケーシング（内筒）１１が損傷するのを防止できる。また、ドアＤの開き位置において下部油収納部２６a内は高圧状態になっているので、ピストン３４に対して圧縮スプリング３８による押圧力と、ダンパーオイルＰによる反発力が同時に作用し、ドアＤが閉じ位置に向けて移動し始める瞬間に、下側縁部３５ｂと内筒２４に形成したねじ溝２５の下側縁部２５ｂとがぶつかることを更に防止できる。 Further, the upper edge 35 a of the thread 35 formed on the outer peripheral surface of the piston 34 by the pressing force of the compression spring 38 provided in the lower oil storage portion 26 a is formed by the screw groove 25 formed on the inner periphery of the inner cylinder 24. The piston 34 is lowered while being always pressed by the upper edge 25a. Further, when the piston 34 descends in the oil storage portion 26, the descending speed of the piston 34 is adjusted by the resistance of the damper oil P flowing through the gap formed between the tapered portion of the adjusting rod 28 and the first adjusting portion 36a. . Since the upper edge 35a of the thread 35 of the piston 34 is pressed against the upper edge 25a of the thread groove 25 of the inner cylinder 24 at the moment when the door D starts to move from the open position to the closed position, It is possible to prevent the lower edge 35b of the thread 35 formed on 34 and the lower edge 25b of the screw groove 25 formed on the inner cylinder 24 from colliding with each other, and the piston 34 and the casing (inner cylinder) 11 are damaged. Can be prevented. Since the lower oil storage portion 26a is in a high pressure state at the opening position of the door D, the pressing force by the compression spring 38 and the repulsive force by the damper oil P act on the piston 34 at the same time. It is possible to further prevent the lower edge 35b and the lower edge 25b of the screw groove 25 formed in the inner cylinder 24 from colliding with each other at the moment when the movement toward the closed position starts.

尚、本発明ではドアDとして防火扉を用いているため、その重量が大きく、復元力が大きいコイルばね２２を使用している。よって、ドアＤが閉じ位置に向けて移動し始める瞬間に、通常の扉の場合に比べて、内筒２４には更に大きな力が働くが、ピストン３４のねじ山３５の上側縁部３５aが、内筒２４のねじ溝２５の上側縁部２５aに押し付けられているので、ピストン３４のねじ山３５の下側縁部３５ｂと内筒２４のねじ溝２５の下側縁部２５ｂとがぶつかることを防止でき、ピストン３４及びケーシング（内筒）１１が損傷するのを防止できる。 In the present invention, since a fire door is used as the door D, the coil spring 22 having a large weight and a high restoring force is used. Therefore, at the moment when the door D starts to move toward the closed position, a larger force is applied to the inner cylinder 24 than in the case of a normal door, but the upper edge 35a of the thread 35 of the piston 34 is Since it is pressed against the upper edge 25 a of the thread groove 25 of the inner cylinder 24, the lower edge 35 b of the thread 35 of the piston 34 and the lower edge 25 b of the thread groove 25 of the inner cylinder 24 collide with each other. This can prevent the piston 34 and the casing (inner cylinder) 11 from being damaged.

また、ダンパーオイルにシリコーンオイルPを用いているので、温度変化によるオイルの粘度変化が小さく、環境温度の変化が生じた場合でも、その度に調整棒２８を操作して調整棒２８のテーパ部分と第１調整部３６aの間で形成される隙間を調整する必要がなく、環境温度変化に対するドアDの閉じ時間の変化を低減できる。更に、シリコーンオイルPに潤滑剤を添加しているので、ピストン３４のねじ山３５の下側縁部３５ｂと内筒２４のねじ溝２５の下側縁部２５ｂとが摺動する際の耐摩耗性を向上させることができる。 Further, since the silicone oil P is used as the damper oil, even when the change in the viscosity of the oil due to the temperature change is small and the change in the environmental temperature occurs, the adjustment rod 28 is operated each time and the taper portion of the adjustment rod 28 is changed. It is not necessary to adjust the gap formed between the first adjusting unit 36a and the change in the closing time of the door D with respect to the environmental temperature change. Further, since the lubricant is added to the silicone oil P, the wear resistance when the lower edge portion 35b of the thread 35 of the piston 34 and the lower edge portion 25b of the screw groove 25 of the inner cylinder 24 slide. Can be improved.

更に、拡径部２０ａの上端位置が調整棒２８のほぼ下端位置まで延びて拡径部２０ａの外周面２０ｃとケーシング１１の内筒２４との間の蝋付け面積を広くしているので、油収納部２６に収納されたダンパーオイルが油収納部２６から外部に漏れるのを防止できると共に、拡径部２０ａの内周に凹溝２０ａを形成することで別途スペースを設けることなく下部油収納部２６ａの容積を大きくできる。さらに、この凹溝２０ａに圧縮スプリング３８の下部を収納するので、別途にスプリングの取り付け座を設けることなく、圧縮スプリングのすわりを良くできる。 Furthermore, since the upper end position of the enlarged diameter portion 20a extends almost to the lower end position of the adjustment rod 28, the brazing area between the outer peripheral surface 20c of the enlarged diameter portion 20a and the inner cylinder 24 of the casing 11 is increased. The damper oil stored in the storage section 26 can be prevented from leaking outside from the oil storage section 26, and the lower oil storage section can be formed without forming a separate space by forming the concave groove 20a on the inner periphery of the enlarged diameter section 20a. The volume of 26a can be increased. Furthermore, since the lower part of the compression spring 38 is accommodated in the concave groove 20a, the compression spring can be satisfactorily provided without providing a separate spring mounting seat.

次に第２の実施形態について図３を用いて説明する。尚、以下に説明する第２の実施の形態では、上述した第１実施の形態と同一部分には同一の符号を付することによって、その部分の詳細な説明を省略する。
第２の実施の形態では、温度変化に応じて第１調整部３６aに形成した隙間を流れるダンパーオイルQの量を変更できる調整棒５０を設けている。詳しくは、調整棒５０の上部に温度センサ５２の検知結果に応じて伸縮する伸縮部材５４が設けており、温度センサ５２が所定温度より低い温度を検知した場合、伸縮部材５４が下方向に伸びることで、調整棒５０が下方向に移動し、第１調整部３６aの隙間が拡大する（図３（a））。 Next, a second embodiment will be described with reference to FIG. Note that in the second embodiment described below, the same parts as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.
In the second embodiment, the adjusting rod 50 is provided that can change the amount of the damper oil Q flowing through the gap formed in the first adjusting portion 36a according to the temperature change. Specifically, an expansion / contraction member 54 that expands and contracts according to the detection result of the temperature sensor 52 is provided above the adjustment rod 50. When the temperature sensor 52 detects a temperature lower than a predetermined temperature, the expansion / contraction member 54 extends downward. As a result, the adjustment rod 50 moves downward, and the gap between the first adjustment portions 36a is enlarged (FIG. 3A).

よって、低温状態でダンパーオイルQの粘性が高くなった場合でも、第１調整部３６aの隙間を流れるオイル流量を一定に保つことができ、ドアＤの閉じ速度を一定に保つことができる。   Therefore, even when the viscosity of the damper oil Q becomes high in a low temperature state, the flow rate of oil flowing through the gap of the first adjustment unit 36a can be kept constant, and the closing speed of the door D can be kept constant.

一方、温度センサ５２が所定温度より高い温度を検知した場合、伸縮部材５４が上方向に伸びることで、調整棒５０が上方向に移動し、第１調整部３６aの隙間が縮小する（図３（ｂ））。よって、高温状態でダンパーオイルQの粘性が低くなった場合でも、第１調整部３６aの隙間を流れるオイル流量を一定に保つことができ、ドアＤの閉じ速度を一定に保つことができる。   On the other hand, when the temperature sensor 52 detects a temperature higher than the predetermined temperature, the extendable member 54 extends upward, so that the adjustment rod 50 moves upward, and the gap of the first adjustment portion 36a is reduced (FIG. 3). (B)). Therefore, even when the viscosity of the damper oil Q becomes low in a high temperature state, the flow rate of the oil flowing through the gap of the first adjustment unit 36a can be kept constant, and the closing speed of the door D can be kept constant.

第２実施の形態では、調整棒５０の上部に温度センサ５２の検知結果に応じて伸縮する伸縮部材５４を設けているので、ダンパーオイルQの粘性が温度変化で変化しやすいものであっても、第１調整部３６aの隙間を流れるオイル流量を一定に保つことができ、環境温度が変化した場合でも、その都度、調整棒の操作を必要とせずに、ドアＤの閉じ速度を一定に保つことができる。   In the second embodiment, since the expansion / contraction member 54 that expands and contracts in accordance with the detection result of the temperature sensor 52 is provided on the upper portion of the adjustment rod 50, even if the viscosity of the damper oil Q is likely to change due to a temperature change. The flow rate of oil flowing through the gap of the first adjusting portion 36a can be kept constant, and even when the environmental temperature changes, the closing speed of the door D is kept constant without requiring the operation of the adjusting rod each time. be able to.

以上、本発明に係るドアクローザ１０の実施形態につき説明したが、本発明にこの実施形態に限定されるものではない。例えば、下部油収納部２６a内に圧縮スプリング３８を設けたが、これに限定されず、上部油収納部２６ｂ内に引張りスプリングを設けるようにしても良い。ドアクローザ１０は中心吊タイプに限定されず、丁番型のものであっても良い。   The embodiment of the door closer 10 according to the present invention has been described above, but the present invention is not limited to this embodiment. For example, although the compression spring 38 is provided in the lower oil storage portion 26a, the present invention is not limited to this, and a tension spring may be provided in the upper oil storage portion 26b. The door closer 10 is not limited to the center hanging type, but may be a hinge type.

本発明の第１実施形態に係るドアクローザの縦断面図であり、（ａ）は閉じ位置の状態、（ｂ）は開き位置の状態を示す図である。It is a longitudinal cross-sectional view of the door closer which concerns on 1st Embodiment of this invention, (a) is a state of a closed position, (b) is a figure which shows the state of an open position. 図１に示すドアクローザのピストン周辺を拡大して示す縦断面図である。It is a longitudinal cross-sectional view which expands and shows the piston periphery of the door closer shown in FIG. 本発明の第２実施形態に係るドアクローザの要部を示す縦断面図であり、（ａ）は低温状態、（ｂ）は常温状態、（ｃ）は高温状態を示す図である。It is a longitudinal cross-sectional view which shows the principal part of the door closer which concerns on 2nd Embodiment of this invention, (a) is a low temperature state, (b) is a normal temperature state, (c) is a figure which shows a high temperature state. 従来例に係るドアクローザのピストン周辺を拡大して示す縦断面図である。It is a longitudinal cross-sectional view which expands and shows the piston periphery of the door closer which concerns on a prior art example.

符号の説明Explanation of symbols

ドアクローザ１０；ケーシング１１；閉じ位置方向付勢部１２；速度調整部１４；取り付け部１６；支持脚部１８；シャフト２０；拡径部２０ａ；円筒状の凹溝２０ｂ；コイルばね２２；内筒（シリンダ）２４；ねじ溝２５；ねじ溝の上側縁部（一側縁部）２５a；ねじ溝の下側縁部（一側縁部）２５ｂ；油収納部２６；下部油収納部２６ａ；上部油収納部２６ｂ；調整棒（調整手段）２８；調整つまみ２８a；調整棒設置部３０；挿通孔３２；ピストン３４；ねじ山３５；ねじ山の上側縁部（一側縁部）３５a；ねじ山の下側縁部（一側縁部）３５ｂ；調整弁３６；第１調整部３６a；第２調整部３６ｂ；圧縮スプリング（弾性部材）３８；調整棒５０；温度センサ５２；伸縮部材５４；ドアＤ；ダンパーオイル（緩衝剤）P、Q；床Ｇ；受座Ｓ




Door closer 10; casing 11; closing position direction biasing portion 12; speed adjusting portion 14; attachment portion 16; support leg portion 18; shaft 20; diameter-expanding portion 20a; Cylinder) 24; screw groove 25; upper edge (one side edge) 25a of screw groove; lower edge (one side edge) 25b of screw groove; oil storage part 26; lower oil storage part 26a; Storage portion 26b; Adjustment rod (adjustment means) 28; Adjustment knob 28a; Adjustment rod installation portion 30; Insertion hole 32; Piston 34; Screw thread 35; Upper edge (one side edge) 35a of the screw thread; Part (one side edge part) 35b; adjustment valve 36; first adjustment part 36a; second adjustment part 36b; compression spring (elastic member) 38; adjustment rod 50; temperature sensor 52; telescopic member 54; (Buffer) P, Q; Floor G; Receiving S




Claims (4)

ドアの回転軸線に沿って取り付けられるドアクローザであって、
ドアを閉じ位置に向けて付勢する閉じ位置方向付勢部と、閉じ位置に向けて移動するドアの戻り速度を調整する速度調整部とを備え、
速度調整部は筒状のシリンダと、シリンダ内に形成され且つ緩衝剤が収納される油収納部と、油収納部内でドアの開閉に連動して移動するピストンとを備え、
油収納部はピストンの上部側に形成された上部油収納部と、ピストンの下端側に形成された下部油収納部とを有し、
ピストンはシリンダとの間でネジ係合により移動自在に配置しており、且つ油収納部内に収納された緩衝剤により制動を受けつつ移動するようになっており、ピストンには上部油収納部と下部油収納部との間の緩衝剤の移動を許容する流体通路と、流体通路内を通過する緩衝剤の量を調整する調整手段とが設けられており、
緩衝剤は粘度の温度による変化が小さいものであり、
油収納部にはピストンを移動方向の一端側に向けて押圧する弾性部材を設けており、
弾性部材の付勢力によってピストンの外周面に形成したねじ山の一側縁部が、シリンダの内周に形成したねじ溝の一側縁部に押し付けられていることを特徴とするドアクローザ。 A door closer attached along the axis of rotation of the door,
A closing position direction urging unit that urges the door toward the closing position, and a speed adjustment unit that adjusts the return speed of the door that moves toward the closing position,
The speed adjustment unit includes a cylindrical cylinder, an oil storage unit that is formed in the cylinder and stores a buffer, and a piston that moves in conjunction with opening and closing of the door in the oil storage unit,
The oil storage part has an upper oil storage part formed on the upper side of the piston, and a lower oil storage part formed on the lower end side of the piston,
The piston is movably arranged by screw engagement with the cylinder, and is moved while being braked by a buffer stored in the oil storage portion. The piston has an upper oil storage portion and A fluid passage allowing movement of the buffer between the lower oil storage portion and an adjusting means for adjusting the amount of the buffer passing through the fluid passage are provided;
Buffering agents are small changes in viscosity with temperature,
The oil storage part is provided with an elastic member that presses the piston toward one end in the moving direction,
A door closer characterized in that one side edge of a thread formed on the outer peripheral surface of a piston by an urging force of an elastic member is pressed against one side edge of a thread groove formed on the inner periphery of a cylinder. 緩衝剤はシリコーンオイルであることを特徴とする請求項１に記載のドアクローザ。 The door closer according to claim 1, wherein the buffer is silicone oil. シリコーンオイルには潤滑剤が添加されていることを特徴とする請求項２に記載のドアクローザ。 The door closer according to claim 2, wherein a lubricant is added to the silicone oil. 弾性部材は、下部油収納部に配置した圧縮スプリングであり、
閉じ位置方向付勢部には、床に固定されるシャフトが設けられており、
シャフトの上部には直径が拡大した拡径部が設けられており、拡径部にはシャフトと同軸の円筒状の凹溝が形成されており、
拡径部の外周面とシリンダとの間を密着固定しており、油収納部に収納された緩衝剤が油収納部から外部に漏れるのを防止しており、
拡径部の上端位置が調整手段のほぼ下端位置まで延びて、拡径部の外周面とシリンダとの間の密着部分の面積を広くしており、
凹溝内に圧縮スプリングの下部を収納していることを特徴とする請求項１に記載のドアクローザ。


The elastic member is a compression spring arranged in the lower oil storage part,
The closed position direction biasing part is provided with a shaft fixed to the floor,
The upper part of the shaft is provided with an enlarged diameter part having an enlarged diameter, and the enlarged diameter part is formed with a cylindrical concave groove coaxial with the shaft.
The outer peripheral surface of the expanded diameter part and the cylinder are closely fixed, and the buffer stored in the oil storage part is prevented from leaking outside from the oil storage part.
The upper end position of the enlarged diameter portion extends almost to the lower end position of the adjusting means, and the area of the close contact portion between the outer peripheral surface of the enlarged diameter portion and the cylinder is widened.
The door closer according to claim 1, wherein a lower portion of the compression spring is accommodated in the concave groove.


JP2007034512A 2007-02-15 2007-02-15 Door closer Pending JP2008196256A (en)

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JP2007034512A JP2008196256A (en) 2007-02-15 2007-02-15 Door closer
EP07832291A EP2119860A1 (en) 2007-02-15 2007-11-21 Door closer
KR1020097016974A KR20090110912A (en) 2007-02-15 2007-11-21 Door closer
PCT/JP2007/072561 WO2008099546A1 (en) 2007-02-15 2007-11-21 Door closer
CN200780052318A CN101641486A (en) 2007-02-15 2007-11-21 Door closer

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KR101050509B1 (en) 2009-04-09 2011-07-20 (주) 아이레보 금강씨에스 Fire Door Door Closer
JP2016108912A (en) * 2014-12-10 2016-06-20 日本ドアーチエック製造株式会社 Door closer
JP2016183555A (en) * 2016-06-08 2016-10-20 リョービ株式会社 Door Closer
US9556659B2 (en) 2015-06-11 2017-01-31 Cmech (Guangzhou Industrial Ltd.) Door closer capable of adjusting its closing speed
US9920561B2 (en) 2015-06-11 2018-03-20 Cmech (Guangzhou) Ltd. Combination hydraulic and pneumatic door closer
CN107916863A (en) * 2016-10-10 2018-04-17 赵芬 It can decline and can preset the structure of the self-closing speed of hinge
US10352079B2 (en) 2016-02-25 2019-07-16 Cmech (Guangzhou) Ltd. Pneumatic door closer

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CN102409915B (en) * 2011-08-30 2013-11-06 陈杰辉 Multifunctional adjustable self-closing buffer hinge
DE102014215902A1 (en) * 2014-08-11 2016-02-11 Suspa Gmbh Damping hinge for damping hinge pivoting about a hinge pivot axis
WO2021170870A1 (en) * 2020-02-28 2021-09-02 Locinox A hydraulically damped hinge for hinging a closure member to a support
US20230146774A1 (en) * 2020-02-28 2023-05-11 Locinox A dashpot for damping a closing movement of a closure system

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KR101050509B1 (en) 2009-04-09 2011-07-20 (주) 아이레보 금강씨에스 Fire Door Door Closer
JP2016108912A (en) * 2014-12-10 2016-06-20 日本ドアーチエック製造株式会社 Door closer
US9556659B2 (en) 2015-06-11 2017-01-31 Cmech (Guangzhou Industrial Ltd.) Door closer capable of adjusting its closing speed
US9920561B2 (en) 2015-06-11 2018-03-20 Cmech (Guangzhou) Ltd. Combination hydraulic and pneumatic door closer
US10352079B2 (en) 2016-02-25 2019-07-16 Cmech (Guangzhou) Ltd. Pneumatic door closer
US10961759B2 (en) 2016-02-25 2021-03-30 Cmech (Guangzhou) Ltd. Pneumatic door closer
US10995532B2 (en) 2016-02-25 2021-05-04 Cmech (Guangzhou) Ltd. Pneumatic door closer
JP2016183555A (en) * 2016-06-08 2016-10-20 リョービ株式会社 Door Closer
CN107916863A (en) * 2016-10-10 2018-04-17 赵芬 It can decline and can preset the structure of the self-closing speed of hinge

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