JP6421027B2

JP6421027B2 - Door closer

Info

Publication number: JP6421027B2
Application number: JP2014250102A
Authority: JP
Inventors: 出向井　康司; 康司出向井
Original assignee: 日本ドアーチエック製造株式会社
Priority date: 2014-12-10
Filing date: 2014-12-10
Publication date: 2018-11-07
Anticipated expiration: 2034-12-10
Also published as: JP2016108912A

Description

本発明は、主として油圧式のドアクローザであり、特にはドアの開閉力に直接影響を与える主軸のトルク調整機構を備えたドアクローザに関するものである。 The present invention is mainly a hydraulic door closer, and more particularly to a door closer provided with a torque adjusting mechanism for a main shaft that directly affects the opening / closing force of the door.

一般に開き扉の急激な開閉を防止するため、油圧式のドアクローザが用いられる。そして当該ドアクローザは用途や環境に応じて開き扉の開閉力を調整するために、ドアクローザ本体に設けられる主軸のトルク調整機構（以下、単に「トルク調整機構」という。）を備えるものも多い。 In general, a hydraulic door closer is used to prevent a sudden opening and closing of the opening door. In many cases, the door closer includes a main shaft torque adjustment mechanism (hereinafter simply referred to as “torque adjustment mechanism”) provided in the door closer body in order to adjust the opening / closing force of the opening door according to the application and environment.

近年においては、外国の安価な製品が市場に氾濫しており、ドアクローザに関しても、国際競争力を図るべくコストダウンが常に求められている。コストダウンを実現するためには、ドアクローザをより簡単な構成で、容易に製造できることが求められる。 In recent years, cheap foreign products are flooding the market, and door closers are always required to reduce costs in order to be internationally competitive. In order to realize cost reduction, it is required that the door closer can be easily manufactured with a simpler configuration.

トルク調整機構を備える油圧式のドアクローザとして、構成部材の低減を進めたものとしては、例えば、ケーシング内で少なくとも１つの戻しばねの力に抗して移動可能なピストンとこのピストンのこちら側に配置された前方の液圧室から前記ピストンのあちら側に配置された後方の液圧室内への液圧的な溢流装置とを備えたドアチェックにおいて、前記ケーシングが２部構造を成していて、ピストンを収容してすべてのケーシング側の通路、弁、絞り装置及び類似物を備えた基本ケーシングと、戻しばねを収容して流れ通路を備えないばねケーシングとから構成されており、このばねケーシングが基本ケーシングに液密に結合されており、基本ケーシングの前方の液圧室と後方の液圧室とを接続する少なくとも２つのケーシング通路のうちの少なくとも１つのケーシング通路が、選択的に流過可能なケーシング通路、若しくは栓、封、又は類似物によって閉鎖されたケーシング通路であることを特徴とするドアチェックであって、シリンダ室（液圧室（２７））内に二重の圧縮ばね（戻しばね１６，１７）とばね受け（１８）と、一端から前記シリンダ室へ貫通する貫通孔（４０）とこれを貫通する軸（４１）を備えたものが公知である（例えば、特許文献１第１２図参照。）。 As a hydraulic door closer equipped with a torque adjustment mechanism, components that have been reduced include, for example, a piston that can move against the force of at least one return spring in the casing and this side of the piston. In a door check provided with a hydraulic overflow device from the forward hydraulic chamber to the rear hydraulic chamber disposed on the other side of the piston, the casing has a two-part structure. A basic casing provided with all the passages, valves, throttling devices and the like on the casing side containing the pistons, and a spring casing containing the return springs and no flow passages. Is coupled to the basic casing in a liquid-tight manner, and includes at least two casing passages connecting the hydraulic chamber in front of the basic casing and the hydraulic chamber in the rear of the basic casing. A door check characterized in that at least one casing passage is a casing passage selectively flowable, or a casing passage closed by a plug, seal or the like, comprising a cylinder chamber (hydraulic chamber) (27)) includes a double compression spring (return springs 16 and 17), a spring receiver (18), a through hole (40) penetrating from one end to the cylinder chamber, and a shaft (41) penetrating therethrough. Are known (for example, see FIG. 12 of Patent Document 1).

特公平７−３０６５２号公報Japanese Patent Publication No. 7-30652

上記特許文献１に係る発明は、前記軸（４１）を回動させることにより、ばね受け（１８）が長手方向へ前進若しくは後退し、前記各ばねの長さを変更することで、トルク調整を行うものである。上記構成によれば、軸（４１）自体がシリンダ室内へ侵入しないように回動させて前記ばね受け（１８）を前後へ移動させることを要する。軸（４１）自体がシリンダ室内へ大きく侵入したり、或いはシリンダ室外から大きく突出すると、操作の困難性や、外観体裁の悪化、ステー等取付に対する制限が生じることにもなるからである。
従って、軸（４１）自体がシリンダ室内へ侵入しないように回動させて前記ばね受け（１８）を前後へ移動させるものの、軸の回動とともにばね受け（１８）は回転してはならず、第１２図右側中央を左右方向に連続する溝等でばね受け（１８）を案内して移動させる。 In the invention according to Patent Document 1, by rotating the shaft (41), the spring receiver (18) moves forward or backward in the longitudinal direction, and the torque adjustment is performed by changing the length of each spring. Is what you do. According to the above configuration, it is necessary to move the spring receiver (18) back and forth by rotating the shaft (41) itself so as not to enter the cylinder chamber. This is because, if the shaft (41) itself greatly enters the cylinder chamber or protrudes greatly from the outside of the cylinder chamber, it becomes difficult to operate, the appearance appearance is deteriorated, and the stay and the like are restricted.
Therefore, although the shaft (41) itself is rotated so as not to enter the cylinder chamber and the spring receiver (18) is moved back and forth, the spring receiver (18) must not rotate with the rotation of the shaft. The spring support (18) is guided and moved in the center on the right side of FIG.

このため、ばね受け（１８）を案内するための溝やばね受け側の突起（第１２図符号１８の中央部分）が必要となるが、特にこのような溝の形成、加工には非常に手間がかかり、折角部品点数を減少させても、コストアップを招来する。
そして上記構成によれば、このようなコストアップを招来する構成としなければ、簡単な構成が実現できず、問題であった。 For this reason, a groove for guiding the spring receiver (18) and a protrusion on the spring receiver side (center part of the reference numeral 18 in FIG. 12) are necessary, but it is particularly troublesome to form and process such a groove. Even if the number of corner parts is reduced, the cost is increased.
And according to the said structure, if it was not set as the structure which causes such a cost increase, a simple structure could not be implement | achieved but it was a problem.

本発明は以上の事情に鑑みてなされたものであり、トルク調整のための軸自体がシリンダ室内へ大きく侵入せず、シリンダ室外へ大きく突出することがないことを前提として、ドアクローザ本体内への溝加工等のコストアップとなる加工を低減でき、低廉で且つ簡単な構成を実現する、トルク調整機構を有する油圧式のドアクローザの提供を、発明が解決しようとする課題とする。 The present invention has been made in view of the above circumstances, and on the premise that the shaft for torque adjustment itself does not greatly enter the cylinder chamber and does not protrude greatly outside the cylinder chamber, An object of the present invention is to provide a hydraulic door closer having a torque adjustment mechanism that can reduce machining that increases costs such as grooving, and realizes an inexpensive and simple configuration.

本発明は、内部空間を有するドアクローザ本体と、該ドアクローザ本体から少なくとも一端を突出した主軸と、該主軸の回転とともに内部空間で長手方向に往復動が可能なピストンと、当該ドアクローザ本体の一端部と前記シリンダ室内におけるピストンとの間に当該ピストンを押圧する圧縮ばねとを備え、前記一端部にはトルク調整部材及びばね受け部を備え、少なくとも前記トルク調整部材は回動可能に設けた構成を備える油圧式のドアクローザにおいて、前記トルク調整部材は、回動手段を有する頭部と、該頭部を基端とする係合軸部と、該係合軸部の先端に設置される規制部とを備え、前記トルク調整部材の係合軸部には、当該係合軸部が貫通する係合軸穴を有し且つ外周には雄螺子部を有するばね受け部材を備え、前記シリンダ室内の内部周壁の少なくとも一部には、前記ばね受け部材の雄螺子部と螺合可能な雌螺子部を備え、前記トルク調整部材を回転させることにより、前記ばね受け部材が、その雄螺子部と前記雌螺子部が螺合した状態で、その係合軸穴と前記係合軸部とともに回転して、長手方向へ前進又は後退可能となることを特徴とするドアクローザを、課題を解決するための手段とする。 The present invention includes a door closer body having an inner space, a main shaft protruding at least one end from the door closer body, a piston capable of reciprocating in the inner space along with the rotation of the main shaft, and one end portion of the door closer body. A compression spring for pressing the piston between the piston in the cylinder chamber, a torque adjusting member and a spring receiving portion at the one end, and at least the torque adjusting member being configured to be rotatable. In the hydraulic door closer, the torque adjusting member includes a head portion having a rotating means, an engagement shaft portion having the head portion as a base end, and a restriction portion installed at a distal end of the engagement shaft portion. The torque adjusting member includes a spring receiving member having an engaging shaft hole through which the engaging shaft portion passes and a male screw portion on the outer periphery; At least a part of the inner peripheral wall of the spring is provided with a female screw portion that can be screwed with the male screw portion of the spring receiving member, and by rotating the torque adjusting member, the spring receiving member is connected to the male screw portion. In order to solve the problem, a door closer that is capable of moving forward and backward in the longitudinal direction by rotating together with the engagement shaft hole and the engagement shaft portion in a state where the female screw portion is screwed. Means.

また本発明は上記発明の構成を前提として、ドアクローザ本体の前記一端部には開口と該開口を閉塞する蓋部を備え、該蓋部は前記トルク調整部材が貫通する中央貫通穴を備え、且つ、蓋部の外周には第二雄螺子部を備え、前記シリンダ室の内部周壁から連続する前記雌螺子部と当該蓋部の第二雄螺子部とを螺着したことを特徴とするドアクローザを、課題を解決するための手段とする。 Further, the present invention, on the premise of the configuration of the above invention, the one end portion of the door closer body is provided with an opening and a lid portion for closing the opening, the lid portion is provided with a central through hole through which the torque adjusting member passes, and A door closer having a second male screw portion on an outer periphery of the lid portion, wherein the female screw portion continuous from the inner peripheral wall of the cylinder chamber and the second male screw portion of the lid portion are screwed together. And means for solving the problem.

本発明によれば、内部空間を有するドアクローザ本体と、該ドアクローザ本体から少なくとも一端を突出した主軸と、該主軸の回転とともに内部空間で長手方向に往復動が可能なピストンと、当該ドアクローザ本体の一端部と前記シリンダ室内におけるピストンとの間に当該ピストンを押圧する圧縮ばねとを備え、前記一端部にはトルク調整部材及びばね受け部を備え、少なくとも前記トルク調整部材は回動可能に設けた構成を備える油圧式のドアクローザにおいて、前記トルク調整部材は、回動手段を有する頭部と、該頭部を基端とする係合軸部と、該係合軸部の先端に設置される規制部とを備え、前記トルク調整部材の係合軸部には、当該係合軸部が貫通する係合軸穴を有し且つ外周には雄螺子部を有するばね受け部材を備え、前記シリンダ室内の内部周壁の少なくとも一部には、前記ばね受け部材の雄螺子部と螺合可能な雌螺子部を備えた構成としたことから、前記トルク調整部材を回転させることにより、前記ばね受け部材が、その雄螺子部と前記雌螺子部が螺合した状態で、前記角柱状の軸部とともに回転して、長手方向へ前進又は後退させることで、圧縮ばねの一端の押圧位置を変更して、ピストンに対する押圧力を調整し、これによって主軸のトルク調整を、上記した簡単な構造で行うことができる。 According to the present invention, a door closer main body having an internal space, a main shaft protruding at least one end from the door closer main body, a piston capable of reciprocating in the internal space along with the rotation of the main shaft, and one end of the door closer main body And a compression spring for pressing the piston between the piston in the cylinder chamber, a torque adjusting member and a spring receiving portion at the one end, and at least the torque adjusting member provided rotatably In the hydraulic door closer, the torque adjustment member includes a head having a rotating means, an engagement shaft portion having the head as a base end, and a restricting portion installed at a distal end of the engagement shaft portion. A spring receiving member having an engagement shaft hole through which the engagement shaft portion penetrates and a male screw portion on the outer periphery. Since at least a part of the inner peripheral wall of the inner chamber is provided with a female screw portion that can be screwed with the male screw portion of the spring receiving member, the spring receiving member can be rotated by rotating the torque adjusting member. The member rotates together with the prismatic shaft portion in a state where the male screw portion and the female screw portion are screwed together, and moves forward or backward in the longitudinal direction, thereby changing the pressing position of one end of the compression spring. Thus, it is possible to adjust the pressing force against the piston and thereby adjust the torque of the main shaft with the above-described simple structure.

また本発明は上記発明の構成を前提として、ドアクローザ本体の前記一端部には開口と該開口を閉塞する蓋部を備え、該蓋部は、少なくとも胴部を備え、該胴部は前記トルク調整部材が貫通する中央貫通穴を備え、当該胴部の外周の少なくとも一部には第二雄螺子部を備え、前記シリンダ室の内部周壁から連続する前記雌螺子部と当該蓋部の第二雄螺子部とを螺着した構成としたことから、上記発明の作用効果を奏する上に、雌螺子部を開口側から前記規制部に対応する位置まで連続して一度に形成できるため、当該一端部の開口により組立作業性が向上するだけでなく、雌螺子部の形成が雄螺子部及び第二雄螺子部の双方の螺合に利用でき、当該一端部の開口を簡単に蓋部で閉塞できる構造となり、生産性を向上させることができる。 Further, according to the present invention, on the premise of the configuration of the above invention, the one end portion of the door closer body includes an opening and a lid portion that closes the opening, the lid portion including at least a trunk portion, and the trunk portion includes the torque adjustment. A central through hole through which the member passes, a second male screw portion provided at least at a part of the outer periphery of the body portion, and the female screw portion continuous from the inner peripheral wall of the cylinder chamber and the second male screw portion of the lid portion. Since the screw part is screwed together, the above-described effects of the present invention can be obtained, and the female screw part can be continuously formed at a time from the opening side to the position corresponding to the restriction part. As well as improving the assembly workability, the formation of the female screw portion can be used for screwing both the male screw portion and the second male screw portion, and the opening of the one end portion can be easily closed by the lid portion. It becomes a structure and productivity can be improved.

本発明の実施例に係るドアクローザをドア及び上枠に設置した状態を示す正面図である。It is a front view which shows the state which installed the door closer which concerns on the Example of this invention in the door and the upper frame. 本発明の実施例に係るドアクローザのドアクローザ本体におけるばね受け部が後退した状態を示す正面縦断面図である。It is a front longitudinal cross-sectional view which shows the state which the spring receiving part in the door closer main body of the door closer concerning the Example of this invention retracted | retreated. 本発明の実施例に係るドアクローザのドアクローザ本体におけるばね受け部が前進した状態を示す正面縦断面図である。It is a front longitudinal cross-sectional view which shows the state which the spring receiving part in the door closer main body of the door closer concerning the Example of this invention advanced. 本発明の実施例に係るドアクローザにおける後端の蓋部の（ａ）左側面図、（ｂ）そのＡ−Ａ断面図である。It is the (a) left view of the cover part of the rear end in the door closer which concerns on the Example of this invention, (b) The AA sectional drawing. 本発明の実施例に係るドアクローザにおけるトルク調整部材の（シール部材、規制部、雄螺子部を省略した）（ａ）右側面図、（ｂ）そのＢ−Ｂ断面図（正面縦断面図）、（ｃ）左側面図である。(A) The right side view of the torque adjustment member in the door closer according to the embodiment of the present invention (the seal member, the restriction portion, and the male screw portion are omitted), (b) the BB cross-sectional view (front vertical cross-sectional view), (C) It is a left view. 本発明の実施例に係るドアクローザにおけるばね受け部の（ａ）右側面図、（ｂ）そのＣ−Ｃ断面図である。It is the (a) right view of the spring receiving part in the door closer which concerns on the Example of this invention, (b) The CC sectional drawing. 本発明の実施例に係るドアクローザにおけるトルク調整部材、ばね受け部、蓋部を組み合わせた状態を示す（ａ）右側面図、（ｂ）そのＤ―Ｄ断面図である。It is the (a) right view and (b) the DD sectional view which show the state which combined the torque adjustment member in the door closer which concerns on the Example of this invention, the spring receiving part, and the cover part. 本発明の他の実施例に係るドアクローザにおけるドアクローザ本体のばね受け部が前進した状態を示す正面縦断面図である。It is a front longitudinal cross-sectional view which shows the state which the spring receiving part of the door closer main body in the door closer concerning the other Example of this invention advanced.

本発明は、内部空間を有するドアクローザ本体と、該ドアクローザ本体から少なくとも一端を突出した主軸と、該主軸の回転とともに内部空間で長手方向に往復動が可能なピストンと、当該ドアクローザ本体の一端部と前記シリンダ室内におけるピストンとの間に当該ピストンを押圧する圧縮ばねとを備え、前記一端部にはトルク調整部材及びばね受け部を備え、少なくとも前記トルク調整部材は回動可能に設けた構成を備え、前記トルク調整部材は、回動手段を有する頭部と、該頭部を基端とする係合軸部と、該係合軸部の先端に設置される規制部とを備え、前記トルク調整部材の係合軸部には、当該係合軸部が貫通する係合軸穴を有し且つ外周には雄螺子部を有するばね受け部材を備え、前記シリンダ室内の内部周壁の少なくとも一部には、前記ばね受け部材の雄螺子部と螺合可能な雌螺子部を備えた構成とすることで、前記トルク調整部材を蓋部に対して回転させることにより、前記ばね受け部材が、その雄螺子部と前記雌螺子部が螺合した状態で、前記角柱状の軸部とともに回転して、長手方向へ前進又は後退させることで、圧縮ばねの一端の押圧位置を変更して、ピストンに対する押圧力を調整し、これによって主軸のトルク調整を、上記した簡単な構造で行うことができ、また、ドアクローザ本体の前記一端部には開口と該開口を閉塞する蓋部を備え、該蓋部は前記トルク調整部材が貫通する中央貫通穴を備え、且つ、蓋部の外周には第二雄螺子部を備え、前記シリンダ室の内部周壁から連続する前記雌螺子部と当該蓋部の第二雄螺子部とを螺着したことで、雌螺子部を開口側から前記規制部に対応する位置まで連続して一度に形成できるため、当該一端部の開口により組立作業性が向上するだけでなく、雌螺子部の形成が雄螺子部及び第二雄螺子部の双方の螺合に利用でき、当該一端部の開口を簡単に蓋部で閉塞できる構造となり、生産性を向上できる優れたドアクローザを実現した。
The present invention includes a door closer body having an inner space, a main shaft protruding at least one end from the door closer body, a piston capable of reciprocating in the inner space along with the rotation of the main shaft, and one end portion of the door closer body. A compression spring that presses the piston between the piston in the cylinder chamber, a torque adjustment member and a spring receiving portion at the one end, and at least the torque adjustment member rotatably provided The torque adjusting member includes a head having a rotating means, an engaging shaft portion having the head as a base end, and a restricting portion installed at a distal end of the engaging shaft portion. The engagement shaft portion of the member has a spring receiving member having an engagement shaft hole through which the engagement shaft portion penetrates and a male screw portion on the outer periphery, and is provided on at least a part of the inner peripheral wall in the cylinder chamber. By providing a female screw part that can be screwed with the male screw part of the spring receiving member, the spring receiving member is rotated by rotating the torque adjusting member with respect to the lid part. In a state where the screw part and the female screw part are screwed together, it rotates together with the prismatic shaft part and advances or retreats in the longitudinal direction, thereby changing the pressing position of one end of the compression spring and pressing the piston against the piston Thus, the torque of the main shaft can be adjusted with the simple structure described above, and the one end of the door closer body is provided with an opening and a lid for closing the opening, and the lid is A central through hole through which the torque adjusting member passes, and a second male screw portion provided on the outer periphery of the lid portion, the female screw portion continuing from the inner peripheral wall of the cylinder chamber and the second male screw of the lid portion Female screw part by screwing Since it can be continuously formed from the opening side to the position corresponding to the restricting portion at a time, not only the assembly workability is improved by the opening of the one end portion, but also the formation of the female screw portion is the male screw portion and the second male screw. It can be used for screwing both parts, and the opening at the one end can be easily closed with a lid, realizing an excellent door closer that can improve productivity.

以下に本発明の実施例に係るドアクローザについて説明する。尚、本発明の説明上、図２におけるドアクローザ本体１の左方を前方とし、右方を後方とする。また、開き扉Ｄの上下方向をドアクローザ本体１の上下方向とする。 The door closer according to the embodiment of the present invention will be described below. For the description of the present invention, the left side of the door closer body 1 in FIG. 2 is the front and the right side is the rear. The vertical direction of the opening door D is the vertical direction of the door closer body 1.

本実施例に係るドアクローザＣは、片開き扉の開閉に際して、急激な開放を抑止するための制動機能を有する油圧式のドアクローザＣである。 The door closer C according to the present embodiment is a hydraulic door closer C having a braking function for preventing sudden opening when the single door is opened and closed.

図１に示すように、当該ドアクローザＣは、開き扉Ｄに固定するドアクローザ本体１と、上枠Ｆへ固定するブラケット部９１と、前記ドアクローザ本体１とブラケット部９１とを連結する２本のアーム（即ち、第一アーム９０ａ及び第二アーム９０ｂ）を有するアーム部９０を備える。 As shown in FIG. 1, the door closer C includes a door closer body 1 that is fixed to the opening door D, a bracket portion 91 that is fixed to the upper frame F, and two arms that connect the door closer body 1 and the bracket portion 91. The arm part 90 which has (namely, the 1st arm 90a and the 2nd arm 90b) is provided.

第一アーム９０ａは、一端が軸ピン９２にてブラケット部９１と回動自在に連結され、他端は軸ピン９３にて第二アーム９０ｂと回動自在に連結される。第二アーム９０ｂは、一端が前記軸ピン９２にて支持され、他端はドアクローザ本体１の主軸５の上端５１に連結される。 One end of the first arm 90 a is rotatably connected to the bracket portion 91 by the shaft pin 92 and the other end is rotatably connected to the second arm 90 b by the shaft pin 93. One end of the second arm 90 b is supported by the shaft pin 92, and the other end is connected to the upper end 51 of the main shaft 5 of the door closer body 1.

ドアクローザ本体１は、図２に示すように、内部空間１０を有する金属製のハウジングの上面及び下面の対応位置に主軸５を逃す上部開口１３、下部開口１４を夫々備える。また、ドアクローザ本体１の一端となる後端側には、蓋部４を取り付け可能とする後端側開口１２（本発明における開口）を備える。内部空間１０は、ピストン６が前後動可能となるシリンダ室を有する。 As shown in FIG. 2, the door closer body 1 includes an upper opening 13 and a lower opening 14 that allow the main shaft 5 to escape at corresponding positions on the upper and lower surfaces of a metal housing having an internal space 10. Moreover, the rear end side used as the end of the door closer main body 1 is provided with the rear end side opening 12 (opening in this invention) which can attach the cover part 4. FIG. The internal space 10 has a cylinder chamber in which the piston 6 can move back and forth.

上部開口１３及び下部開口１４から、上端５１及び下端５２が突出して配置され且つピニオン歯５０を有する主軸５を備える。主軸５の上端５１は上蓋８０の貫通穴を通して上方へ突出し、上蓋８０は上部開口１３を閉塞する。同様に、主軸５の下端は下蓋８１の貫通穴を通して下方へ突出し、下蓋８１は下部開口１４を閉塞する。また当該主軸５のピニオン歯５０と噛合するラック歯６０を有するピストン６を備える。
当該ピストン６は、中央に主軸５を通す収納空間６２を有する。また、該収納空間６２から前端側へ作動油通路を備える。当該収納空間６２から後端側へ作動油通路を備える。前端側及び後端側の各作動油通路には、弁体が夫々設けられる。 An upper end 51 and a lower end 52 protrude from the upper opening 13 and the lower opening 14 and are provided with a main shaft 5 having pinion teeth 50. The upper end 51 of the main shaft 5 protrudes upward through the through hole of the upper lid 80, and the upper lid 80 closes the upper opening 13. Similarly, the lower end of the main shaft 5 protrudes downward through the through hole of the lower lid 81, and the lower lid 81 closes the lower opening 14. A piston 6 having rack teeth 60 that mesh with the pinion teeth 50 of the main shaft 5 is also provided.
The piston 6 has a storage space 62 through which the main shaft 5 passes. Further, a hydraulic oil passage is provided from the storage space 62 to the front end side. A hydraulic oil passage is provided from the storage space 62 to the rear end side. Valve bodies are respectively provided in the hydraulic oil passages on the front end side and the rear end side.

後端側開口１２の縁部には、拡径凹部１２ａを形成している。該拡径凹部１２ａから連続して前方のシリンダ室内の周壁に、雌螺子部１１を連続形成している。 A diameter-enlarged recess 12 a is formed at the edge of the rear end side opening 12. A female screw portion 11 is continuously formed on the peripheral wall in the front cylinder chamber continuously from the enlarged diameter recess 12a.

蓋部４は、図４に示すように、胴部４２とその後端に連続して大径部４１を備えている。胴部４２の中央部には、中央貫通穴４０を備えている。胴部４２には第二雄螺子部４３を設けてある。
前記中央貫通穴４０には、後端側から内側段部４０ｄを介して前端側が拡径した内側拡径部４０ｃを形成してある。当該内側拡径部４０ｃには止め環４０ａを差し込むための内溝４０ｂを設けている。尚、蓋部４の後面側には、当該蓋部４の取付時に工具を差し込むための取付用穴４４を有している。 As shown in FIG. 4, the lid part 4 includes a body part 42 and a large-diameter part 41 continuous to the rear end thereof. A central through hole 40 is provided in the central portion of the body portion 42. The body portion 42 is provided with a second male screw portion 43.
The central through hole 40 is formed with an inner diameter-enlarged portion 40c whose front end side is enlarged from the rear end side via an inner stepped portion 40d. The inner enlarged diameter portion 40c is provided with an inner groove 40b for inserting the retaining ring 40a. In addition, on the rear surface side of the lid portion 4, there is an attachment hole 44 for inserting a tool when the lid portion 4 is attached.

トルク調整部材２は、図５に示すように、前記蓋部４の中央貫通穴４０内に保持され、且つ、前記蓋部４に対して回動可能となり、ばね受け部材３を前後方向に移動させる手段となるものである。
当該トルク調整部材２は、後端面に回動手段として工具差込穴２０ｄを備えた頭部２０と、該頭部２０を基端として前方へ四角柱状の係合軸部２１を備える。
前記頭部２０の側面には全周に亘る溝状の凹部２０ｂを備え、当該凹部２０ｂには環状のシール部材２０ｃを取着している。前記頭部２０の前端には鍔部２０ａを形成してある。また、前記係合軸部２１の先端面には螺子穴２１ａを設けてある。 As shown in FIG. 5, the torque adjusting member 2 is held in the central through hole 40 of the lid portion 4 and is rotatable with respect to the lid portion 4, and moves the spring receiving member 3 in the front-rear direction. It becomes a means to make it.
The torque adjusting member 2 includes a head 20 provided with a tool insertion hole 20d as a rotating means on the rear end surface, and a square columnar engaging shaft portion 21 forward from the head 20 as a base end.
The side surface of the head 20 is provided with a groove-like recess 20b extending around the entire circumference, and an annular seal member 20c is attached to the recess 20b. A flange portion 20a is formed at the front end of the head portion 20. Further, a screw hole 21 a is provided in the distal end surface of the engagement shaft portion 21.

ばね受け部材３は、図６に示すように、円形板の中央に前記トルク調整部材２の係合軸部２１の断面形状に適合させた形状（即ち、本実施例においては四角形状）の係合軸穴３０を備える。また前記円形板の側周面全体に、雄螺子部３１を備える。ばね受け部材３の直径はシリンダ室の内径に略一致させている。そして、前記雄螺子部３１は、当該シリンダ室内の周壁に形成した前記雌螺子部１１と螺合するものとしている。 As shown in FIG. 6, the spring receiving member 3 has a shape (that is, a quadrangular shape in this embodiment) adapted to the cross-sectional shape of the engaging shaft portion 21 of the torque adjusting member 2 at the center of the circular plate. A coaxial hole 30 is provided. A male screw portion 31 is provided on the entire side peripheral surface of the circular plate. The diameter of the spring receiving member 3 is substantially matched with the inner diameter of the cylinder chamber. The male screw portion 31 is screwed with the female screw portion 11 formed on the peripheral wall in the cylinder chamber.

蓋部４とトルク調整部材２の取付については、先ず蓋部４の前端側となる内側拡径部４０ｃからトルク調整部材２の頭部２０の後端を挿入する。次に、当該トルク調整部材２の鍔部２０ａと蓋部４における中央貫通穴４０の内側段部４０ｄとが当接した状態とする。そして、前記中央貫通穴４０の内溝４０ｂに止め環４０ａを嵌入する。これによって、蓋部４に対してトルク調整部材２が回動可能な状態で一体となる。 Regarding the attachment of the lid portion 4 and the torque adjustment member 2, first, the rear end of the head portion 20 of the torque adjustment member 2 is inserted from the inner diameter enlarged portion 40 c which is the front end side of the lid portion 4. Next, the flange 20a of the torque adjusting member 2 and the inner step 40d of the central through hole 40 in the lid 4 are brought into contact with each other. Then, the retaining ring 40 a is inserted into the inner groove 40 b of the central through hole 40. Thus, the torque adjusting member 2 is integrated with the lid portion 4 in a rotatable state.

トルク調整部材２とばね受け部材３の取付については、先ずトルク調整部材２の係合軸部２１に対してばね受け部材３の係合軸穴３０を通す。次に、当該係合軸部２１の先端面２１ｂに対して中心穴を有する円盤状の止め環を規制部２２として当接させた状態とする。そして、先端側から当該中心穴を通して螺子部材２３を前記螺子穴２１ａに螺着する。これによって、前記係合軸部２１の先端に当該規制部２２を設けた構成とする。ばね受け部材３は、規制部２２によってトルク調整部材２の係合軸部２１から脱抜不能の状態となる。 For attaching the torque adjusting member 2 and the spring receiving member 3, first, the engaging shaft hole 30 of the spring receiving member 3 is passed through the engaging shaft portion 21 of the torque adjusting member 2. Next, a disc-shaped retaining ring having a center hole is brought into contact with the distal end surface 21 b of the engaging shaft portion 21 as the restricting portion 22. Then, the screw member 23 is screwed into the screw hole 21a through the center hole from the front end side. Thus, the restriction portion 22 is provided at the tip of the engagement shaft portion 21. The spring receiving member 3 is brought into a state in which it cannot be removed from the engagement shaft portion 21 of the torque adjusting member 2 by the restricting portion 22.

上記の手順によって、図７に示すように、ばね受け部材３とトルク調整部材２と蓋部４が一体に構成される。ばね受け部材３は、規制部２２に当接する位置から蓋部４の前端に当接する位置の範囲での移動が可能となる。 As shown in FIG. 7, the spring receiving member 3, the torque adjusting member 2, and the lid portion 4 are integrally formed by the above procedure. The spring receiving member 3 can be moved in a range from a position where it comes into contact with the restricting portion 22 to a position where it comes into contact with the front end of the lid portion 4.

そして、図２及び図７に示すように、シリンダ室内で、作動油が満たされた状態において、ピストン６の後端６１とばね受け部材３との間に、二本の圧縮ばね（外側圧縮ばね７０、内側圧縮ばね７１）を配置した状態を確保して、前記シリンダ室内の雌螺子部１１に対してばね受け部材３の雄螺子部３１、蓋部４の第二雄螺子部４３を順に螺合させることで、ドアクローザ本体１に対してトルク調整機構を具備させる。ここで蓋部４は、その第二雄螺子部４３が前記雌螺子部１１と螺合することに加えて、その大径部４１は大径部前端面４１ａによって雌螺子部１１まで前進せず、拡径凹部１２ａ内で保持されることによって雌螺子部１１に対して過度に嵌り込むことが防止され、且つ、確実に固定される。 As shown in FIGS. 2 and 7, two compression springs (outer compression springs) are provided between the rear end 61 of the piston 6 and the spring receiving member 3 in a state where the hydraulic oil is filled in the cylinder chamber. 70, the inner compression spring 71) is secured, and the male screw portion 31 of the spring receiving member 3 and the second male screw portion 43 of the lid portion 4 are sequentially screwed into the female screw portion 11 in the cylinder chamber. By combining, the door closer body 1 is provided with a torque adjusting mechanism. Here, in addition to the second male screw portion 43 being screwed with the female screw portion 11, the large-diameter portion 41 does not advance to the female screw portion 11 by the large-diameter front end surface 41 a. By being held in the diameter-enlarged recess 12a, it is prevented from being excessively fitted into the female screw portion 11, and is securely fixed.

尚、本実施例に係るドアクローザ本体は、図示省略するが、ドアの開閉速度を調節するための速度調節バルブ及びこれに通じる作動油の流路を備える。またバックチェック機構のためのバックチェック用調節バルブ及びこれに通じる作動油の流路を備える。 Although not shown, the door closer body according to the present embodiment includes a speed adjustment valve for adjusting the opening / closing speed of the door and a hydraulic oil flow path leading to the speed adjustment valve. In addition, a back check adjusting valve for the back check mechanism and a hydraulic fluid passage leading to the back check adjustment valve are provided.

本実施例に係るドアクローザは、上記のトルク調整機構を備えたことにより、以下の操作により、トルク調整機能を発揮することができる。
トルク調整部材２の頭部２０に形成された工具差込穴２０ｄ（本実施例において六角穴）に六角レンチ等の工具を差し込み、右回転させる。蓋部４に対してトルク調整部材２を回転させると、当該トルク調整部材２の係合軸部２１に係合したばね受け部材３が共に回動する。トルク調整部材２自体は前後方向への移動はされないものの、ばね受け部材３は、その雄螺子部３１がシリンダ室内の雌螺子部１１と螺合し、当該雌螺子部１１に案内されることによって、その螺合状態が継続されたまま、前方へ移動する。ばね受け部材は、第２図に示すように、規制部２２と当接する位置まで前進可能となる。 Since the door closer according to the present embodiment includes the torque adjustment mechanism described above, a torque adjustment function can be exhibited by the following operation.
A tool such as a hexagon wrench is inserted into a tool insertion hole 20d (in this embodiment, a hexagonal hole) formed in the head 20 of the torque adjusting member 2 and rotated clockwise. When the torque adjustment member 2 is rotated with respect to the lid portion 4, the spring receiving member 3 engaged with the engagement shaft portion 21 of the torque adjustment member 2 rotates together. Although the torque adjusting member 2 itself is not moved in the front-rear direction, the spring receiving member 3 has its male screw portion 31 screwed into the female screw portion 11 in the cylinder chamber and guided to the female screw portion 11. Then, the screw moves forward while the screwed state is continued. As shown in FIG. 2, the spring receiving member can be advanced to a position where it comes into contact with the restricting portion 22.

当該操作によって、ピストン６の後端６１とばね受け部材３との距離が小さくなり、当該ピストン６の後端６１とばね受け部材３との間に配置された各圧縮ばね７０、７１の圧縮率は上昇する。
これによって前記ピストン６の後端６１への押圧力が大きくなり、ピストン６のラック歯６０と噛合する主軸５のトルクを高めることができる。 By this operation, the distance between the rear end 61 of the piston 6 and the spring receiving member 3 is reduced, and the compression rate of each compression spring 70, 71 disposed between the rear end 61 of the piston 6 and the spring receiving member 3. Rises.
As a result, the pressing force to the rear end 61 of the piston 6 increases, and the torque of the main shaft 5 that meshes with the rack teeth 60 of the piston 6 can be increased.

また、同手順で左回転させることによって、蓋部４に対してトルク調整部材２が回転し、当該トルク調整部材２の係合軸部２１に係合したばね受け部材３は共に左回転する。同様に、トルク調整部材２自体は前後方向へ移動しないが、ばね受け部材３は、その雄螺子部３１がシリンダ室内の雌螺子部１１と螺合し、当該雌螺子部１１に案内されて、その螺合状態が継続されたまま後方へ移動する。ばね受け部材３は、第１図に示すように、蓋体の前端と当接する位置まで後退可能となる。 Further, when the counterclockwise rotation is performed in the same procedure, the torque adjusting member 2 is rotated with respect to the lid portion 4, and both the spring receiving members 3 engaged with the engaging shaft portion 21 of the torque adjusting member 2 are rotated counterclockwise. Similarly, the torque adjusting member 2 itself does not move in the front-rear direction, but the spring receiving member 3 has its male screw portion 31 screwed into the female screw portion 11 in the cylinder chamber and is guided by the female screw portion 11. It moves backward while the screwing state is continued. As shown in FIG. 1, the spring receiving member 3 can be retracted to a position where it comes into contact with the front end of the lid.

ピストン６の後端６１とばね受け部材３との距離が大きくなり、当該ピストン６の後端６１とばね受け部材３との間に配置された各圧縮ばね７０、７１の圧縮率は下降する。
これによって前記ピストン６の後端６１への押圧力が小さくなり、ピストン６のラック歯６０と噛合する主軸５のトルクを下げることができる。 The distance between the rear end 61 of the piston 6 and the spring receiving member 3 is increased, and the compression rates of the compression springs 70 and 71 disposed between the rear end 61 of the piston 6 and the spring receiving member 3 are lowered.
As a result, the pressing force to the rear end 61 of the piston 6 is reduced, and the torque of the main shaft 5 that meshes with the rack teeth 60 of the piston 6 can be reduced.

上記したように、本発明の実施例に係るトルク調整部材２における頭部２０に設けた回動手段として工具差込穴２０ｄを設けたものとしているが、本発明は上記実施例に限定されるものではなく、例えば、図８に他の実施例として示すように、六角ボルト頭２０ｅ等とすることもできる。
当該頭部２０に設けた回動手段はその他の工具や手動で回転させる構成とすることもできるし、モータ等の動力源を取り付けてスイッチ操作等によって行うものとすることもできる。しかしながら、上記実施例に示した工具差込穴２０ｄや前記六角ボルト頭等とすれば、より簡単な構成で安価なドアクローザの提供につながる点で望ましい。 As described above, the tool insertion hole 20d is provided as the rotating means provided in the head 20 of the torque adjusting member 2 according to the embodiment of the present invention, but the present invention is limited to the above embodiment. For example, as shown in FIG. 8 as another embodiment, a hexagon bolt head 20e may be used.
The rotating means provided on the head 20 may be configured to rotate by other tools or manually, or may be performed by operating a switch with a power source such as a motor attached. However, the tool insertion hole 20d or the hexagon bolt head shown in the above embodiment is desirable because it leads to provision of an inexpensive door closer with a simpler configuration.

上記したように、本発明の実施例に係るトルク調整部材２における係合軸部２１は、四角柱としている。しかしながら、本発明によれば、当該係合軸部２１の形状は、四角柱に限らず、角柱の角数は三角以上であればその角数は制限されない。また、角柱のみならず、例えば当該係合軸部２１の断面形状が、小判状、楕円状、対称軸を有しない曲線及び／又は直線で囲まれる任意の形状等とすることができる。
即ち、本発明の趣旨からすれば、係合軸部２１は、ばね受け部材３の係合軸穴３０と相互に長手方向に対して摺動可能であり、且つ、回転の際には相互に係合状態が保たれる形状を有するものであればよい。 As described above, the engagement shaft portion 21 in the torque adjusting member 2 according to the embodiment of the present invention is a quadrangular prism. However, according to the present invention, the shape of the engagement shaft portion 21 is not limited to a quadrangular prism, and the number of corners is not limited as long as the number of corners of the prism is not less than a triangle. In addition to the prism, for example, the cross-sectional shape of the engagement shaft portion 21 may be an oval shape, an oval shape, an arbitrary shape surrounded by a curve and / or a straight line having no axis of symmetry, or the like.
In other words, according to the gist of the present invention, the engagement shaft portion 21 can slide relative to the engagement shaft hole 30 of the spring receiving member 3 with respect to the longitudinal direction. What is necessary is just to have a shape in which the engaged state is maintained.

また、上記実施例に係るドアクローザによれば、製造上の制約等がない限りにおいて、ドアクローザ本体１の蓋部４は必須ではない。ドアクローザ本体１に対してトルク調整部材２が上記調節機構を発揮すべく、ドアクローザ本体１の後端側が、作動油の漏れを防止するシール性能を有する構成を備え、且つ、トルク調整部材２が外部から回動操作可能であればよい。 Moreover, according to the door closer which concerns on the said Example, as long as there is no restrictions on manufacture, the cover part 4 of the door closer main body 1 is not essential. The rear end side of the door closer body 1 is provided with a sealing performance for preventing leakage of hydraulic oil so that the torque adjusting member 2 can exert the adjusting mechanism with respect to the door closer body 1, and the torque adjusting member 2 is externally provided. It is only necessary to be able to rotate from

一方で、本実施例のように蓋部４を設けることによっては、本発明の特徴となる構造、即ち、ばね受け部材３に雌螺子部１１を螺合した構造を実現する際に、当該ばね受け部材を雌螺子部１１へ螺合させることが非常に容易となる。従って、本発明の目的とする生産性の向上を高めることができる点において優れた効果を得ることができる。 On the other hand, by providing the lid portion 4 as in the present embodiment, the spring is realized when the structure that characterizes the present invention, that is, the structure in which the female screw portion 11 is screwed to the spring receiving member 3 is realized. It becomes very easy to screw the receiving member into the female screw portion 11. Therefore, an excellent effect can be obtained in that the improvement in productivity which is the object of the present invention can be enhanced.

尚、上記実施例では鍔部４１はドアクローザ１本体の後端開口部１２内で固定されるものとしているが、これに代えて、後端開口部１２内には雌螺子部１１を形成し、鍔部４１は後端側開口１２の周囲（即ち後端面１５）に当接する構造とすることもできる。また、上記実施例では大径部４１を形成し胴部４２の外周全体に第二雄螺子部４３を形成しているが、本発明は当該構成に限定されるものではなく、例えば大径部４２を形成せず、胴部４２の外周のうち前方側に第二雄螺子部４３を設け、後方側には第二雄螺子部４３を設けない構成等とし、雌螺子部１１に対して過度に嵌り込むことが防止される機能を備えることもできる。 In addition, in the said Example, although the collar part 41 shall be fixed in the rear-end opening part 12 of the door closer 1 main body, instead of this, the internal thread part 11 is formed in the rear-end opening part 12, The flange portion 41 may be configured to abut against the periphery of the rear end side opening 12 (that is, the rear end surface 15). Moreover, in the said Example, although the large diameter part 41 was formed and the 2nd male screw part 43 was formed in the whole outer periphery of the trunk | drum 42, this invention is not limited to the said structure, For example, a large diameter part 42, the second male screw part 43 is provided on the front side of the outer periphery of the body part 42, and the second male screw part 43 is not provided on the rear side. It is also possible to provide a function that is prevented from being fitted in.

また、上記実施例に係るドアクローザによれば、規制部２２は止め環を用いた構成としているが、本発明においては当該構成に限られず、ばね受け部材３を規制できる機能を備えている限り、その形状、構造等を変更することができる。 Further, according to the door closer according to the above embodiment, the restricting portion 22 has a structure using a retaining ring, but the present invention is not limited to this structure, and as long as it has a function capable of restricting the spring receiving member 3, Its shape, structure, etc. can be changed.

１ドアクローザ本体
１０内部空間
１１雌螺子部
１２後端側開口
１２ａ拡径凹部
１３上部開口
１４下部開口
１５後端面
２トルク調整部材
２０頭部
２０ａ鍔部
２０ｂ凹部
２０ｃシール部材
２０ｄ工具差込穴
２０ｅ六角ボルト頭
２１係合軸部
２１ａ螺子穴
２１ｂ先端面
２２規制部
２３螺子部材
３ばね受け部材
３０係合軸穴
３１雄螺子部
４蓋部
４０中央貫通穴
４０ａ止め環
４０ｂ内溝
４０ｃ内側拡径部
４０ｄ内側段部
４１大径部
４１ａ大径部前端面
４２胴部
４３第二雄螺子部
４４取付用穴
５主軸
５０ピニオン歯
５１上端
５２下端
６ピストン
６０ラック歯
６１後端
６２収納空間
７０外側圧縮ばね
７１内側圧縮ばね
８０上蓋
８１下蓋
９０アーム部
９０ａ第一アーム
９０ｂ第二アーム
９１ブラケット
９２軸ピン
９３軸ピン
Ｃドアクローザ
Ｄ開き扉
Ｆ上枠
DESCRIPTION OF SYMBOLS 1 Door closer body 10 Internal space 11 Female screw part 12 Rear end side opening 12a Diameter expansion recessed part 13 Upper opening 14 Lower opening 15 Rear end surface 2 Torque adjustment member 20 Head part 20a Gutter part 20b Recessed part 20c Seal member 20d Tool insertion hole 20e Hex Bolt head 21 Engagement shaft portion 21a Screw hole 21b Front end surface 22 Restriction portion 23 Screw member 3 Spring receiving member 30 Engagement shaft hole 31 Male screw portion 4 Lid portion 40 Central through hole 40a Retaining ring 40b Inner groove 40c Inner diameter expansion portion 40d Inner step portion 41 Large diameter portion 41a Large diameter portion front end face 42 Body portion 43 Second male screw portion 44 Mounting hole 5 Main shaft 50 Pinion teeth 51 Upper end 52 Lower end 6 Piston 60 Rack teeth 61 Rear end 62 Storage space 70 Outer compression Spring 71 Inner compression spring 80 Upper lid 81 Lower lid 90 Arm portion 90a First arm 90b Second arm 1 bracket 92 shaft pin 93 axle pin C door closer D open door F upper frame

Claims

内部空間を有するドアクローザ本体と、該ドアクローザ本体から少なくとも一端を突出した主軸と、該主軸の回転とともに内部空間で長手方向に往復動が可能なピストンと、当該ドアクローザ本体の一端部と前記シリンダ室内におけるピストンとの間に当該ピストンを押圧する圧縮ばねとを備え、前記一端部にはトルク調整部材及びばね受け部を備え、少なくとも前記トルク調整部材は回動可能に設けた構成を備える油圧式のドアクローザにおいて、
前記トルク調整部材は、回動手段を有する頭部と、該頭部を基端とする係合軸部と、該係合軸部の先端に設置される規制部とを備え、
前記トルク調整部材の係合軸部には、当該係合軸部が貫通する係合軸穴を有し且つ外周には雄螺子部を有するばね受け部材を備え、
前記シリンダ室内の内部周壁の少なくとも一部には、前記ばね受け部材の雄螺子部と螺合可能な雌螺子部を備え、
前記トルク調整部材を回転させることにより、前記ばね受け部材が、その雄螺子部と前記雌螺子部が螺合した状態で、その係合軸穴と前記係合軸部とともに回転して、長手方向へ前進又は後退可能となることを特徴とするドアクローザ。 A door closer body having an internal space, a main shaft protruding at least one end from the door closer body, a piston capable of reciprocating in the longitudinal direction in the internal space along with the rotation of the main shaft, one end portion of the door closer main body, and the cylinder chamber A hydraulic door closer including a compression spring that presses the piston between the piston, a torque adjusting member and a spring receiving portion at the one end, and at least the torque adjusting member rotatably provided In
The torque adjusting member includes a head having a rotating means, an engaging shaft portion having the head as a base end, and a restricting portion installed at a distal end of the engaging shaft portion .
The engaging shaft portion of the torque adjusting member includes a spring receiving member having an engaging shaft hole through which the engaging shaft portion passes and a male screw portion on the outer periphery.
At least a part of the inner peripheral wall in the cylinder chamber includes a female screw portion that can be screwed with a male screw portion of the spring receiving member,
By rotating the torque adjusting member, the spring receiving member rotates together with the engagement shaft hole and the engagement shaft portion in a state in which the male screw portion and the female screw portion are screwed together, so that the longitudinal direction A door closer that can move forward or backward.

ドアクローザ本体の前記一端部には開口と該開口を閉塞する蓋部を備え、
該蓋部は、少なくとも胴部を備え、該胴部は前記トルク調整部材が貫通する中央貫通穴を備え、当該胴部の外周の少なくとも一部には第二雄螺子部を備え、
前記シリンダ室の内部周壁から連続する前記雌螺子部と当該蓋部の第二雄螺子部とを螺着したことを特徴とする請求項１記載のドアクローザ。 The one end of the door closer body is provided with an opening and a lid for closing the opening,
The lid portion includes at least a body portion, the body portion includes a central through hole through which the torque adjusting member passes, and a second male screw portion is provided on at least a part of the outer periphery of the body portion,
2. The door closer according to claim 1, wherein the female screw portion continuous from the inner peripheral wall of the cylinder chamber and the second male screw portion of the lid portion are screwed together.