JP4012329B2 - Door closer - Google Patents

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Publication number
JP4012329B2
JP4012329B2 JP00920399A JP920399A JP4012329B2 JP 4012329 B2 JP4012329 B2 JP 4012329B2 JP 00920399 A JP00920399 A JP 00920399A JP 920399 A JP920399 A JP 920399A JP 4012329 B2 JP4012329 B2 JP 4012329B2
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JP
Japan
Prior art keywords
cam
door
support cylinder
cylinder
support
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Expired - Fee Related
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JP00920399A
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Japanese (ja)
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JP2000204841A (en
Inventor
正雄 和氣
Original Assignee
美和ロック株式会社
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Priority to JP00920399A priority Critical patent/JP4012329B2/en
Publication of JP2000204841A publication Critical patent/JP2000204841A/en
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Description

【0001】
【発明の属する技術分野】
この発明は、扉をばねの力で自動的に閉鎖するドアクローザに係り、特に、簡単な構造で確実に作動し、かつ扉を開いた状態を保持できるストッパー機能をも有するドアクローザに関する。
【0002】
【従来の技術】
ドアクローザというと、通常油圧緩衝装置を利用したリンク装置を連想するが、軽い扉を閉止するドアクローザとして、例えば蝶番に捩りコイルばねを組込んだ所謂ばね蝶番がある。
【0003】
【発明が解決しようとする課題】
しかしながら、上記した所謂ばね蝶番は、通常、蝶番の芯棒と外筒の間の小さなスペースにばねを組込まなければならないため、設計に制約が多く、作動の確実性に欠ける、という不都合がある。
【0004】
かといって、油圧緩衝装置を有するドアクローザは簡単な扉或いは軽い扉には不釣り合いで、牛刀をもって鶏を割くの感がある。
【0005】
そこで、この発明は、簡単な構造で作動が確実であり、しかも扉を開いた状態を保持できるストッパー機構を組込んだドアクローザを提供することを目的としている。
【0006】
【課題を解決するための手段】
上記の目的を達成するため、請求項1に記載の発明は、開口端の内周縁に段部を形成した支持筒と、円柱の一部をなす部材で、一面に螺旋状のカム面及び螺旋軸に垂直な平面部を連設し、螺旋軸と同軸の異形断面孔を形成した他面を外側にして支持筒の開口端部に回動自在に嵌装された作動カムと、この作動カムより内側における支持筒内に摺動可能に嵌装され、作動カムのカム面と面接合する螺旋状のカム面を形成した外端を作動カムの一面に接合させると共に、支持筒の軸線回りの回動を拘束された遊動プラグと、支持筒内に弾装され、遊動プラグを作動カム方向に付勢するばね部材と、少なくとも先端に作動カムの異形断面孔と嵌合する異形断面部を形成した連結軸を出し入れ可能に保持した連結装置とを有し、支持筒と連結装置とを同軸に配設した状態で、扉の上端縁支持端部及び扉枠の一方に支持筒を、他方に連結装置を夫々装着したことを特徴とする。
【発明の実施の形態】
以下、この発明の実施例を図面を参照して説明する。
図1に示すように、この発明によるドアクローザAは、図1における扉Dの左上隅部、すなわち扉Dの上端縁部で、ノブKとは反対側の支持端縁部に装着される。
【0007】
そして、図示の実施例では、支持筒1が扉D側に、連結装置2が扉枠3側に夫々装着されている。
【0008】
なお、扉Dの下端縁部には、ドアクローザAと同軸に、スラスト軸受けBが装着され、扉の重量を担持すると共に、扉の自由側端縁が円弧を描いて開閉できるように案内している。
【0009】
このスラスト軸受けBは、例えば図2に示すように、床面4に植設され、厚いフランジ状の頭部を有する支持ピン5と、開口を下にして扉の下端縁支持端部に装着されたカップ状の受け体6とを有し、この受け体6は内面に例えばテフロン等の減摩コートを施され、この減摩コート7と支持ピン5の頭部との接合を介して扉の荷重を支持ピン5に担持させている。
【0010】
一方、上記支持筒1は、図3に示すように、上端に取付の為のフランジを形成し、上端の開口端内周縁に段部8を形成した円筒で、例えば下端部内周面に形成された雌ねじ部と螺合する円盤状の底板9により下端開口を閉塞する。
【0011】
この支持筒1の上端部には、図4に示すように、段部8に装着された環状のスラストリング11を介して、作動カム12が回動可能に嵌装されている。
【0012】
この作動カム12は、図5乃至図7に示すように、円柱の一部をなす部材で、その一面(図では下面)には、螺旋状のカム面13と螺旋軸に垂直な平面部14とが連設されている。
【0013】
また、作動カム12の一面には、後述の遊動プラグを支持案内するための芯棒15が同軸かつ一体に結合されている。
【0014】
この芯棒15は、後述の遊動プラグの支持案内を確実にするために設けられているもので、この発明の必須の構成要素ではない。
【0015】
図示の実施例におけるカム面13は、図7において芯棒15の中心軸を通る水平線に関し上下対称に形成されている。それは、このドアクローザを内開き及び外開きができる扉に適用するためである。
【0016】
なお、図7において例えば芯棒15の中心軸を通る垂直線は、両面が滑らかに接続されていれば実際には見えない線であるが、後の説明を簡単にするため、またカム面13及び平面部14の境を示すために描かれている。
【0017】
作動カム12の他面(図で上面)には、例えば小判形の異形断面孔16が螺旋軸と同軸に形成されている。
【0018】
他方、上記支持筒1の作動カム12より下方には、図4に示すように、遊動プラグ17が摺動可能に嵌装されている。
【0019】
この遊動プラグ17は、図8及び図9に示すように、作動カム12に対向する外端(上端)に作動カムと同様に螺旋状のカム面13と螺旋軸に垂直な平面部14とを連設した円柱体であって、その外径は例えば作動カム12の外径、及び支持筒1の内径とほぼ同じに設定されている。
【0020】
また、この遊動プラグ17には、その中心軸線に沿って、前記作動カム12の芯棒15(図5参照)に回転可能に被嵌されるガイド孔18が形成されている。
【0021】
更にまた、遊動プラグ17の外周面の図9における下端部にはガイドピン19が突設されており、このガイドピン19は、支持筒1の一部にその母線方向に沿って開口する案内長孔21(図3参照)に摺動可能に係合している(図4参照)。
【0022】
上記した構成により、遊動プラグ17は支持筒1の軸線方向には一定距離相対移動できるが、支持筒1の軸線回りの回動は拘束される。
【0023】
また、図4に示すように、支持筒1の底板9と遊動プラグ17との間には、圧縮コイルばね等のばね部材22が弾装されており、このばね部材22の弾力により、遊動プラグ17はそのカム面が作動カム12のカム面13に弾圧される方向に付勢されている。
【0024】
なお、図4に示す実施例では、底板9の中央に開口した六角形の開口に六角レンチを差し入れ、これを回すことにより底板9を支持筒1の軸線に沿って上下させることができ、結果としてばね部材22の弾力を調整することができる。
【0025】
上記した諸構成部材は、図4に示すように、扉Dに固定された支持筒1内の作動カム12に、その芯棒15をガイド孔18(図9参照)に差込んだ状態で遊動プラグ17を接合させ、ばね部材22によりスラストリング11を介してこれらを内筒1の段部8に弾圧させるようにして支持筒ブロックを構成する。
【0026】
一方、図4に示すように、扉枠3には連結装置2が配設されており、この連結装置は、少なくとも先端に作動カムの異形断面孔16と嵌合する異形断面部(図示の実施例では小判形)を形成した連結軸23を出し入れ可能に保持した装置で、連結軸の横断面形状が異形であることを除けば、かかる装置は公知である。
【0027】
なお、通常の構成では、この連結軸23は外方(図4に示す実施例では下方)に突出する方向に付勢されており、連結軸23に打込まれた操作ピン24を操作することにより連結軸を引っ込ませることができる。
【0028】
上記のように構成されたドアクローザは、扉を扉枠に吊り込むとき、先ずスラスト軸受けBの受け体6を支持ピン5に被せ、次いで、操作ピン24を持上げて連結軸23を上方に引っ込ませた状態で扉を扉枠に填め込み、連結軸23と作動カム12の異形断面孔16とが整合したとき連結軸23を自由にし、連結軸の付勢力により連結軸23を異形断面孔16に嵌合させる。
【0029】
この発明によるドアクローザは、例えば図1のノブKを握って向こう側に押せば、扉D側に装着された支持筒1は、図4に示すものを上方から見たとして、反時計方向に回動する。
【0030】
図4から明らかなように、支持筒1内の作動カム12は連結軸23との係合により支持筒1の軸線回りの回動を阻止される。
【0031】
また、前記したように支持筒1に嵌装された遊動プラグ17は支持筒1の軸線回りの相対回動を拘束されているから、遊動プラグ17は支持筒1と一体的に作動カム12に対し相対回動する。
【0032】
その結果、遊動プラグ17のカム面13は作動カム12のそれと摺接しつつ、楔作用により上方に移動する方向に力を受ける。
【0033】
そして、図10に示すように、ばね部材22を押し縮めつつ作動カム12に押し下げられるようにして下降する。
【0034】
このとき、図4及び図10から明らかなように、作動カム12は連結軸23を介して扉枠3に係止された状態にあるから、作動カム12はその上面をスラストリング11と摺接させ、下面を遊動プラグ17の上部と摺接させつつ相対的に支持筒1内で回動する。
【0035】
扉口を人が出入りした後扉から手を離すと、作動カム12と遊動プラグ17のカム面13、13が接合している状態、例えば扉の開度が鋭角である場合には、作動カム12に押し下げられた遊動プラグ17に対し、ばね部材22がこれを作動カム12に押圧するように弾力を及ぼす。
【0036】
その結果、遊動プラグ17は作動カム12のカム面13に沿って回動しながら上昇し、回転方向においてこれと一体の支持筒1及び扉Dは閉鎖する方向に力を受けるので扉は自動的に閉鎖される。
【0037】
これを正確に言うと、ばね部材19の弾力の作動カム12の接線方向の分力が作動カム12を回動させようとするが、作動カム12は扉枠3に固定されているので、作動カム12からの反力により遊動プラグ17は扉閉鎖方向に回転モーメントを受ける。
【0038】
この回転モーメントは、ばね部材22の弾力やカム面13の傾斜度等を調節することにより自由に設定できる。
【0039】
一方、遊動プラグ17のカム面13の最上部が図10に示す位置より右方に移動して作動カム12の平面部14に接合するに至ると、ばね部材22の弾力は平面部14に垂直に作用するのみで上記した楔作用は生じないから、ノブから手を離しても扉は閉じない。
【0040】
この扉にストッパーがかかった状態は、扉を少し閉めて遊動プラグのカム面13を作動カム12のそれに接合させることにより容易に解くことができる。
【0041】
なお、図示の実施例では支持筒1を扉D側に、連結装置2を扉枠3側に設けるものとしたが、扉枠3を深く掘り上げることを厭わなければこれらの取付箇所を逆にしてもよい。
【0042】
また、作動カム12と遊動プラグ17とは面接触をするものとしたが、従来の立体カム装置のように従動側の遊動プラグ側にローラを設け(図示せず)、摩擦を減じるようにしてもよい。
【0043】
【発明の効果】
以上の説明から明らかなように、この発明は、扉を閉鎖方向に駆動する回転モーメントを決定するばね部材の寸法やカム面の傾斜度の設定の自由度が大きいので、充分な閉鎖回転モーメントを設定することができ、簡単な構成でドアクローザの作動の確実性を向上させることができる。
【0044】
また、カム面に平面部を連設し、扉の開度が大きいとき遊動プラグがこの平面部に接合するようにしたので、このドアクローザにストッパー機能を付与することができる、等種々の効果を奏する。
【図面の簡単な説明】
【図1】 この発明の一実施例によるドアクローザを装着した扉の線図的正面図。
【図2】 スラスト軸受けの構造を示す線図的断面図。
【図3】 支持筒の一部断面正面図。
【図4】 この発明の一実施例によるドアクローザの一部断面正面図で、扉が閉鎖されている状態を示す。
【図5】 作動カムの一部断面正面図。
【図6】 作動カムの平面図。
【図7】 作動カムの底面図。
【図8】 遊動プラグの平面図。
【図9】 遊動プラグの正面図。
【図10】 この発明の一実施例によるドアクローザの一部断面正面図で、扉が開いている状態を示す。
【符号の説明】
1 支持筒
2 連結装置
3 扉枠
8 段部
12 作動カム
13 カム面
14 平面部
16 異形断面孔
17 遊動プラグ
19 ガイドピン
21 案内長孔
22 ばね部材
23 連結軸
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door closer that automatically closes a door with the force of a spring, and more particularly to a door closer that operates reliably with a simple structure and also has a stopper function that can keep the door open.
[0002]
[Prior art]
A door closer is usually associated with a link device using a hydraulic shock absorber. As a door closer for closing a light door, there is a so-called spring hinge in which a torsion coil spring is incorporated in a hinge, for example.
[0003]
[Problems to be solved by the invention]
However, the above-described so-called spring hinge usually has a disadvantage that there are many design limitations and lack of operational reliability because the spring must be incorporated in a small space between the hinge core and the outer cylinder.
[0004]
However, a door closer with a hydraulic shock absorber is disproportionate to a simple door or a light door, and has the feeling of breaking a chicken with a cow sword.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a door closer incorporating a stopper mechanism that can be reliably operated with a simple structure and that can hold the door open.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is a support cylinder having a stepped portion formed on the inner peripheral edge of an opening end, and a member forming a part of a cylinder, and a spiral cam surface and a spiral on one surface. An operating cam that is provided with a flat portion perpendicular to the shaft and is rotatably fitted to the open end of the support cylinder with the other surface formed with a modified cross-sectional hole coaxial with the helical shaft facing outward. more slidably fitted in the support tube to the inside, the outer end forming a helical cam surface that joins the cam surface and the surface of the actuating cam causes joined to one surface of the actuating cam, the support cylinder around the axis A floating plug constrained in rotation, a spring member that is elastically mounted in the support cylinder and urges the floating plug in the direction of the operating cam, and a deformed cross-sectional portion that fits at the tip of the deformed cross-sectional hole of the operating cam A connecting device that holds the connecting shaft so that it can be inserted and removed. While disposed on the shaft, one on the support tube of the upper edge support end and door frame of the door, characterized in that the connecting device to the other respective attached.
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the door closer A according to the present invention is attached to the upper left corner of the door D in FIG. 1, that is, the upper edge of the door D, on the support edge opposite to the knob K.
[0007]
In the illustrated embodiment, the support cylinder 1 is mounted on the door D side, and the connecting device 2 is mounted on the door frame 3 side.
[0008]
A thrust bearing B is mounted coaxially with the door closer A at the lower edge of the door D to carry the weight of the door and guide the door so that the free side edge can be opened and closed in a circular arc. Yes.
[0009]
As shown in FIG. 2, for example, the thrust bearing B is mounted on a floor 4 and is attached to a support pin 5 having a thick flange-shaped head and a lower end edge support end of the door with the opening facing down. And a cup-shaped receiving body 6. The receiving body 6 is provided with an anti-friction coating such as Teflon on the inner surface, and the door is connected to the head of the anti-friction coating 7 and the support pin 5. A load is carried on the support pin 5.
[0010]
On the other hand, as shown in FIG. 3, the support cylinder 1 is a cylinder in which a flange for attachment is formed at the upper end and a step portion 8 is formed at the inner peripheral edge of the open end of the upper end. For example, the support cylinder 1 is formed on the inner peripheral surface of the lower end. The lower end opening is closed by a disc-shaped bottom plate 9 screwed into the female thread portion.
[0011]
As shown in FIG. 4, an operating cam 12 is rotatably fitted to the upper end portion of the support cylinder 1 via an annular thrust ring 11 attached to the step portion 8.
[0012]
As shown in FIGS. 5 to 7, the operation cam 12 is a member that forms a part of a cylinder, and on one surface (the lower surface in the drawing), a spiral cam surface 13 and a plane portion 14 perpendicular to the spiral axis. Are connected to each other.
[0013]
A core rod 15 for supporting and guiding a later-described floating plug is coaxially and integrally coupled to one surface of the operating cam 12.
[0014]
The core rod 15 is provided to ensure support and support of the floating plug described later, and is not an essential component of the present invention.
[0015]
The cam surface 13 in the illustrated embodiment is formed vertically symmetrical with respect to a horizontal line passing through the central axis of the core rod 15 in FIG. This is because the door closer is applied to a door that can be opened inward and outward.
[0016]
In FIG. 7, for example, a vertical line passing through the central axis of the core rod 15 is a line that is not actually visible if both surfaces are smoothly connected. And it is drawn to show the boundary of the plane portion 14.
[0017]
On the other surface (upper surface in the drawing) of the working cam 12, for example, an oval shaped irregular cross-sectional hole 16 is formed coaxially with the helical axis.
[0018]
On the other hand, a floating plug 17 is slidably fitted below the operating cam 12 of the support cylinder 1 as shown in FIG.
[0019]
As shown in FIGS. 8 and 9, the floating plug 17 has a helical cam surface 13 and a flat portion 14 perpendicular to the helical axis at the outer end (upper end) facing the working cam 12, similar to the working cam. It is the columnar body provided continuously, Comprising: The outer diameter is set substantially the same as the outer diameter of the action | operation cam 12, and the internal diameter of the support cylinder 1, for example.
[0020]
The floating plug 17 is formed with a guide hole 18 that is rotatably fitted to the core rod 15 (see FIG. 5) of the operating cam 12 along the central axis.
[0021]
Furthermore, a guide pin 19 protrudes from the lower end portion of the outer peripheral surface of the floating plug 17 in FIG. 9, and this guide pin 19 is a guide length that opens along a generatrix direction of a part of the support cylinder 1. The hole 21 (see FIG. 3) is slidably engaged (see FIG. 4).
[0022]
With the above-described configuration, the floating plug 17 can be relatively moved in the axial direction of the support cylinder 1 by a certain distance, but the rotation of the support cylinder 1 around the axis is restricted.
[0023]
As shown in FIG. 4, a spring member 22 such as a compression coil spring is elastically mounted between the bottom plate 9 of the support cylinder 1 and the floating plug 17. The cam surface 17 is urged in the direction in which the cam surface is pressed against the cam surface 13 of the operating cam 12.
[0024]
In the embodiment shown in FIG. 4, a hexagonal wrench is inserted into the hexagonal opening opened in the center of the bottom plate 9, and the bottom plate 9 can be moved up and down along the axis of the support cylinder 1 by turning this. As a result, the elasticity of the spring member 22 can be adjusted.
[0025]
As shown in FIG. 4, the above-described constituent members are idle in a state in which the core rod 15 is inserted into the guide hole 18 (see FIG. 9) in the operation cam 12 in the support cylinder 1 fixed to the door D. The plug 17 is joined, and the support cylinder block is configured such that the spring member 22 presses the plug 17 to the step portion 8 of the inner cylinder 1 through the thrust ring 11.
[0026]
On the other hand, as shown in FIG. 4, a connecting device 2 is disposed on the door frame 3, and this connecting device has a deformed cross-section portion (figure shown in the figure) that fits at least the tip of the deformed cross-sectional hole 16 of the operating cam. The apparatus is known in the art except that the connecting shaft 23 in the form of an oval shape is detachably held and the cross-sectional shape of the connecting shaft is irregular.
[0027]
In a normal configuration, the connecting shaft 23 is biased in a direction protruding outward (downward in the embodiment shown in FIG. 4), and the operating pin 24 driven into the connecting shaft 23 is operated. Thus, the connecting shaft can be retracted.
[0028]
In the door closer configured as described above, when the door is suspended from the door frame, first, the support body 5 of the thrust bearing B is covered on the support pin 5, and then the operation pin 24 is lifted to retract the connecting shaft 23 upward. In this state, the door is fitted into the door frame, and when the connecting shaft 23 and the deformed section hole 16 of the operating cam 12 are aligned, the connecting shaft 23 is freed, and the connecting shaft 23 is transformed into the deformed section hole 16 by the urging force of the connecting shaft. Fit.
[0029]
For example, if the door closer according to the present invention is grasped and pushed away from the knob K in FIG. 1, the support cylinder 1 mounted on the door D side rotates counterclockwise as viewed from above as shown in FIG. Move.
[0030]
As apparent from FIG. 4, the operation cam 12 in the support cylinder 1 is prevented from rotating around the axis of the support cylinder 1 by engagement with the connecting shaft 23.
[0031]
Further, as described above, since the floating plug 17 fitted to the support cylinder 1 is restrained from relative rotation around the axis of the support cylinder 1, the floating plug 17 is integrated with the operation cam 12 integrally with the support cylinder 1. It rotates relative to it.
[0032]
As a result, the cam surface 13 of the floating plug 17 receives a force in a direction of moving upward by a wedge action while being in sliding contact with that of the operating cam 12.
[0033]
Then, as shown in FIG. 10, the spring member 22 is lowered so as to be pushed down by the operating cam 12 while being compressed.
[0034]
At this time, as apparent from FIGS. 4 and 10, the operating cam 12 is locked to the door frame 3 via the connecting shaft 23, so that the upper surface of the operating cam 12 is in sliding contact with the thrust ring 11. Then, the lower surface is relatively rotated within the support cylinder 1 while being in sliding contact with the upper portion of the floating plug 17.
[0035]
When the door is released after a person enters and exits the door opening, the operating cam 12 and the cam surfaces 13, 13 of the floating plug 17 are joined, for example, when the opening of the door is an acute angle, the operating cam The spring member 22 exerts elasticity on the floating plug 17 pushed down by 12 so as to press the spring member 22 against the operating cam 12.
[0036]
As a result, the floating plug 17 rises while rotating along the cam surface 13 of the actuating cam 12, and the support cylinder 1 and the door D integrated therewith in the rotational direction receive a force in the closing direction, so the door is automatically Closed.
[0037]
To be exact, the component force in the tangential direction of the operating cam 12 of the elastic force of the spring member 19 tries to rotate the operating cam 12, but the operating cam 12 is fixed to the door frame 3. Due to the reaction force from the cam 12, the loose plug 17 receives a rotational moment in the door closing direction.
[0038]
This rotational moment can be freely set by adjusting the elasticity of the spring member 22, the inclination of the cam surface 13, and the like.
[0039]
On the other hand, when the uppermost part of the cam surface 13 of the floating plug 17 moves to the right from the position shown in FIG. 10 and joins to the flat part 14 of the operating cam 12, the elasticity of the spring member 22 is perpendicular to the flat part 14. Since the above-mentioned wedge action does not occur only by acting on the door, the door does not close even when the hand is released from the knob.
[0040]
The state where the stopper is applied to the door can be easily solved by closing the door a little and joining the cam surface 13 of the floating plug to that of the operating cam 12.
[0041]
In the illustrated embodiment, the support cylinder 1 is provided on the door D side and the connecting device 2 is provided on the door frame 3 side. However, if it is not necessary to dig up the door frame 3 deeply, these attachment positions are reversed. May be.
[0042]
The actuating cam 12 and the floating plug 17 are in surface contact with each other, but a roller (not shown) is provided on the driven floating plug side as in the conventional three-dimensional cam device so as to reduce friction. Also good.
[0043]
【The invention's effect】
As is clear from the above description, the present invention has a large degree of freedom in setting the dimensions of the spring member and the inclination of the cam surface that determines the rotational moment for driving the door in the closing direction. It can be set, and the reliability of the operation of the door closer can be improved with a simple configuration.
[0044]
In addition, since a flat portion is connected to the cam surface, and the floating plug is joined to the flat portion when the door opening degree is large, various effects such as providing a stopper function to the door closer can be obtained. Play.
[Brief description of the drawings]
FIG. 1 is a diagrammatic front view of a door equipped with a door closer according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view showing the structure of a thrust bearing.
FIG. 3 is a partial cross-sectional front view of a support tube.
FIG. 4 is a partial cross-sectional front view of a door closer according to an embodiment of the present invention, showing a state in which the door is closed.
FIG. 5 is a partial cross-sectional front view of an operating cam.
FIG. 6 is a plan view of an operating cam.
FIG. 7 is a bottom view of the operating cam.
FIG. 8 is a plan view of the floating plug.
FIG. 9 is a front view of the floating plug.
FIG. 10 is a partial sectional front view of a door closer according to an embodiment of the present invention, showing a state in which the door is open.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support cylinder 2 Connecting apparatus 3 Door frame 8 Step part 12 Actuating cam 13 Cam surface 14 Plane part 16 Deformed cross-section hole 17 Free plug 19 Guide pin 21 Guide long hole 22 Spring member 23 Connecting shaft

Claims (1)

開口端の内周縁に段部を形成した支持筒と、円柱の一部をなす部材で、一面に螺旋状のカム面及び螺旋軸に垂直な平面部を連設し、螺旋軸と同軸の異形断面孔を形成した他面を外側にして支持筒の開口端部に回動自在に嵌装された作動カムと、この作動カムより内側における支持筒内に摺動可能に嵌装され、作動カムのカム面と面接合する螺旋状のカム面を形成した外端を作動カムの一面に接合させると共に、支持筒の軸線回りの回動を拘束された遊動プラグと、支持筒内に弾装され、遊動プラグを作動カム方向に付勢するばね部材と、少なくとも先端に作動カムの異形断面孔と嵌合する異形断面部を形成した連結軸を出し入れ可能に保持した連結装置とを有し、支持筒と連結装置とを同軸に配設した状態で、扉の上端縁支持端部及び扉枠の一方に支持筒を、他方に連結装置を夫々装着したことを特徴とするドアクローザ。A support cylinder that forms a step on the inner periphery of the open end, and a member that forms a part of a cylinder. A spiral cam surface and a plane that is perpendicular to the spiral axis are connected to one side of the cylinder. An operation cam that is rotatably fitted to the opening end of the support cylinder with the other surface having a cross-sectional hole formed outside, and an operation cam that is slidably fitted into the support cylinder inside the operation cam. An outer end that forms a helical cam surface that is surface-bonded to the cam surface of the cam is joined to one surface of the operating cam, and an idler plug that is constrained from rotating about the axis of the support cylinder, and elastically mounted in the support cylinder. A spring member that biases the floating plug in the direction of the operating cam, and a connecting device that holds the connecting shaft formed with a deformed cross-sectional portion that fits at the tip of the deformed cross-sectional hole of the operating cam at least at the tip. With the cylinder and the coupling device arranged coaxially, the upper edge support end of the door and the door frame Door closer, wherein a support tube, and the connecting device to the other respective mounted towards.
JP00920399A 1999-01-18 1999-01-18 Door closer Expired - Fee Related JP4012329B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP00920399A JP4012329B2 (en) 1999-01-18 1999-01-18 Door closer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP00920399A JP4012329B2 (en) 1999-01-18 1999-01-18 Door closer

Publications (2)

Publication Number Publication Date
JP2000204841A JP2000204841A (en) 2000-07-25
JP4012329B2 true JP4012329B2 (en) 2007-11-21

Family

ID=11713934

Family Applications (1)

Application Number Title Priority Date Filing Date
JP00920399A Expired - Fee Related JP4012329B2 (en) 1999-01-18 1999-01-18 Door closer

Country Status (1)

Country Link
JP (1) JP4012329B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8225458B1 (en) 2001-07-13 2012-07-24 Hoffberg Steven M Intelligent door restraint

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