JP3503825B2 - Hydraulic synchronized lift - Google Patents
Hydraulic synchronized liftInfo
- Publication number
- JP3503825B2 JP3503825B2 JP2001124545A JP2001124545A JP3503825B2 JP 3503825 B2 JP3503825 B2 JP 3503825B2 JP 2001124545 A JP2001124545 A JP 2001124545A JP 2001124545 A JP2001124545 A JP 2001124545A JP 3503825 B2 JP3503825 B2 JP 3503825B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- operating rod
- cylinder
- lift
- sub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、直列に設けられた
マスタシリンダ及びサブシリンダを同調させ、整備車両
を昇降する油圧同調リフト、特に、上昇時におけるサブ
シリンダ側のロッドの遅れを解消することができる油圧
同調リフトに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulically synchronized lift for raising and lowering a maintenance vehicle by synchronizing a master cylinder and a sub-cylinder provided in series, and in particular, eliminating a delay of a rod on the sub-cylinder side when ascending. The present invention relates to a hydraulic synchronous lift.
【０００２】[0002]
【従来の技術】従来の油圧同調リフトは、例えば特開平
１０−１７２８５号公報（公報では図５）に示すように
構成されていた。すなわち、図５で示すように油圧同調
リフトＸにおいては、マスタシリンダ３１と、それより
も小径のサブシリンダ３２とが油圧同調回路３３によっ
て直列に接続されている（便宜上、該公報に記載の符号
と同一のものを使用する）。2. Description of the Related Art A conventional hydraulic synchronizing lift has been constructed as shown in, for example, Japanese Patent Application Laid-Open No. 10-17285 (FIG. 5 in the publication). That is, as shown in FIG. 5 , in the hydraulic tuning lift X, the master cylinder 31 and the sub-cylinder 32 having a smaller diameter than that are connected in series by the hydraulic tuning circuit 33 (for convenience, reference numerals described in the publication). Use the same).
【０００３】しかして、この油圧同調回路３３は、リフ
トのロッド（作動杆）３１ａ，３２ａの上昇時に、上昇
バルブ３５を開き、ポンプ３６の吐出油をマスタシリン
ダ３１に供給し、マスタシリンダ３１の吐出油をサブシ
リンダ３２に送り込み、両シリンダ３１，３２の作動杆
３１ａ，３２ａを同調させて上昇し、下降時には、下降
バルブ３７を開き、車両重量により圧油を逆流させ、作
動杆３１ａ，３２ａを同調させて下降する。However, the hydraulic pressure synchronizing circuit 33 opens the lift valve 35 and supplies the discharge oil of the pump 36 to the master cylinder 31 when the lift rods (operating rods) 31a and 32a are lifted. The discharge oil is sent to the sub-cylinder 32, and the operating rods 31a and 32a of both cylinders 31 and 32 rise in synchronism with each other. When the hydraulic rod descends, the lowering valve 37 is opened, and the pressure oil is caused to flow backward by the weight of the vehicle. Synchronize and descend.
【０００４】そして、前記サブシリンダ３２には同調補
正回路３４が接続され、サブシリンダ３２が油漏れ等の
原因により上昇端手前位置で停止した場合に、補正バル
ブ３８を開き、圧油をサブシリンダ３２の下室３２ｂに
供給し、サブシリンダ側の作動杆３２ａの上昇端位置を
補正し、両シリンダ３１，３２のリフト量を等しくでき
るように構成されている。A tuning correction circuit 34 is connected to the sub-cylinder 32. When the sub-cylinder 32 is stopped at a position before the rising end due to an oil leak or the like, the correction valve 38 is opened to release the pressure oil to the sub-cylinder. It is configured so that the lift amount of both cylinders 31 and 32 can be made equal by supplying to the lower chamber 32b of 32 and correcting the rising end position of the operating rod 32a on the sub-cylinder side.
【０００５】ところで、上記油圧同調リフトＸの構造上
の欠点として、普通一般にサブシリンダの作動杆３２ａ
の動作が多少遅れる傾向にある。その原因は二本のシリ
ンダ３１，３２間の配管長、配管内のオイル漏れ、エア
ーの混入などである。これは物理的にどうしても発生し
てしまうのが現状であり、そのため定期的にリフトの同
調について何らかのメンテナンスが必要となっている。By the way, as a structural defect of the hydraulic synchronizing lift X, generally, the operating rod 32a of the sub-cylinder is generally used.
Operation tends to be delayed a little. The causes are the length of the pipe between the two cylinders 31 and 32, the oil leak in the pipe, the mixing of air, and the like. Under the present circumstances, this physically occurs inevitably, and therefore some kind of maintenance is regularly required for the tuning of the lift.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、この
種の油圧同調リフトが抱える問題点に鑑み、極力、リフ
トの構成部品点数を増やすことなく、簡単な機構と合理
的手段により、上述した問題点を解決することである。SUMMARY OF THE INVENTION The object of the present invention is to solve the above problems of hydraulically tuned lift by using a simple mechanism and rational means without increasing the number of component parts of the lift as much as possible. It is to solve the problem.
【０００７】[0007]
【課題を解決するための手段】第１実施例の油圧同調リ
フトは、マスタシリンダとサブシリンダとが油圧同調回
路を介して直列に接続されている油圧同調リフトに於い
て、前記マスタシリンダ３１Ａの作動杆３１ａの下端部
４５に、該作動杆３１ａに設けたストッパーと該下端部
４５にスライド嵌合する可動ピストン４６Ａとの間にサ
ブシリンダ側の遅れを補正することができるように所要
のストロークＡを設定し、また、可動ピストン４６Ａと
前記ストッパーとの間に弾性体７０を設けると共に、油
圧同調回路３３Ａ側に作動油を補充するチェック弁７２
を設け、油圧回路の上昇用バルブ３５Ａが開いた初期
時、第１作動油ａにより可動ピストン４６Ａのみがスラ
イド上昇することを特徴とする。The hydraulic tuning lift of the first embodiment is a hydraulic tuning lift in which a master cylinder and a sub-cylinder are connected in series via a hydraulic tuning circuit. The lower end portion 45 of the operating rod 31a is provided with a stopper provided on the operating rod 31a and the lower end portion.
Between the movable piston 46A that slide-fits to the 45 and the movable piston 46A.
Set the desired stroke A to be able to correct the Bushirinda side delay, also a movable piston 46A
An elastic body 70 is provided between the stopper and
Check valve 72 for replenishing hydraulic oil to the pressure tuning circuit 33A side
Is provided , and only the movable piston 46A is slid up by the first hydraulic fluid a at the initial stage when the valve 35A for raising the hydraulic circuit is opened.
【０００８】第２実施例の油圧同調リフトは、マスタシ
リンダとサブシリンダとが油圧同調回路を介して直列に
接続されている油圧同調リフトに於いて、前記マスタシ
リンダ３１Ａの作動杆３１ａの先端部４３にロッドヘッ
ト４２Ｂに形成した筒状嵌合部１２を嵌合し、また、該
嵌合部１２の内壁上面１６と作動杆３１ａの上端面２２
との間にサブシリンダ側の遅れを補正することができる
ように所要のストロークＡを設定し、下端部に固定ピス
トン４６Ｂを有する作動杆３１ａは、油圧回路の上昇用
バルブ３５Ａが開いた初期時、第１作動油ａにより作動
杆３１ａのみが前記嵌合部１２をスライド上昇すること
を特徴とする。The hydraulic tuning lift of the second embodiment is a hydraulic tuning lift in which a master cylinder and a sub-cylinder are connected in series via a hydraulic tuning circuit, and the tip end of the operating rod 31a of the master cylinder 31A is used. 43 is fitted to the cylindrical fitting portion 12 formed on the rod head 42B, and the inner wall upper surface 16 of the fitting portion 12 and the upper end surface 22 of the operating rod 31a are fitted together.
The delay on the sub-cylinder side can be corrected between
With the required stroke A set as described above, the operating rod 31a having the fixed piston 46B at the lower end thereof is fitted with only the operating rod 31a by the first hydraulic oil a at the initial stage when the lifting valve 35A of the hydraulic circuit is opened. It is characterized in that the portion 12 is slid up.
【０００９】ここで、「所要のストロークＡ」とは、マ
スタシリンダ３１Ａ側のロッドヘット４２（４２Ｂ）の
上昇時点と、サブシリンダ３２Ａ側のロッドヘット６２
の上昇時点を同期させるための上昇距離を言う。Here, "required stroke A" means the time when the rod head 42 (42B) on the master cylinder 31A side rises, and the rod head 62 on the sub cylinder 32A side.
Says the climb distance to synchronize the rise time of.
【００１０】[0010]
【発明の実施の形態】図１乃至図４に示す第１実施例を
参照に本発明の実施の形態を説明する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to a first embodiment shown in FIGS.
【００１１】（１）発明の実施の環境
図１は発明の実施の環境を示す説明図である。図１と図
１５を対比すると明らかなように、油圧同調リフトＸ１
を構成する基本的構成部材並びに油圧回路は同一であ
る。したがって、以下、本発明の各実施例の説明に当た
って、従来の実施例と同一の部分には同一又は同様の符
号を付し、重複する説明を割愛する。そこで、発明の実
施の環境と「特徴点」を明らかにする。(1) Environment for Carrying Out the Invention FIG. 1 is an explanatory diagram showing the environment for carrying out the invention. As is clear from comparison between FIG. 1 and FIG. 15, the hydraulic synchronized lift X1
The basic components and hydraulic circuit that configure the above are the same. Therefore, in the following description of each embodiment of the present invention, the same parts as those of the conventional embodiment will be denoted by the same or similar reference numerals and redundant description will be omitted. Therefore, the environment for carrying out the invention and "characteristic points" will be clarified.
【００１２】（２）構成部材と油圧回路
Ｘ１は第１実施例の油圧同調リフト、３１Ａはマスタシ
リンダ、３２Ａはサブシリンダ、３３Ａは油圧同調回
路、３４Ａは同調補正回路、３５Ａは上昇用バルブ、３
６Ａはポンプ、３７Ａは下降用バルブ、３８Ａは補正用
バルブ、３１ａはマスタシリンダ３１Ａの作動杆、３１
ｂはマスタシリンダ３１Ａの下室である。一方、３２ａ
はサブシリンダ３２Ａの作動杆、３２ｂはサブシリンダ
３２Ａの下室である。(2) Components and hydraulic circuit X1 are the hydraulic tuned lift of the first embodiment, 31A is a master cylinder, 32A is a sub-cylinder, 33A is a hydraulic tuned circuit, 34A is a tuned correction circuit, and 35A is a lift valve. Three
6A is a pump, 37A is a lowering valve, 38A is a correcting valve, 31a is an operating rod of the master cylinder 31A, 31
b is the lower chamber of the master cylinder 31A. On the other hand, 32a
Is an operating rod of the sub-cylinder 32A, and 32b is a lower chamber of the sub-cylinder 32A.
【００１３】上記油圧回路の作用は従来例と同様であ
る。すなわち、リフトの両作動杆３１ａ，３２ａの上昇
時、上昇用バルブ３５Ａは開き、ポンプ３６Ａの吐出油
（第１作動油）がマスタシリンダ３１Ａに流れ込む。ま
たマスタシリンダ３１Ａの吐出油（第２作動油）は配管
３３Ａを介してサブシリンダ３２Ａ側へと送り込まれ
る。The operation of the hydraulic circuit is similar to that of the conventional example. That is, when the lift operating rods 31a and 32a are raised, the raising valve 35A is opened, and the oil discharged from the pump 36A (first hydraulic oil) flows into the master cylinder 31A. Further, the oil discharged from the master cylinder 31A (second hydraulic oil) is sent to the sub cylinder 32A side through the pipe 33A.
【００１４】その結果、両シリンダ３１Ａ，３２Ａの作
動杆３１ａ，３２ａは同調的に上昇する。一方、作動杆
３１ａ，３２ａの下降時には、下降用バルブ３７Ａが開
き、車両重量により圧油を逆流させる。なお、符号３
９、３９はフイルターである。
（３）本発明の主要部
ここで図２及び図３を参照に、本発明の主要部について
説明する。前述したように３１ａはマスタシリンダ３１
Ａの作動杆である。この作動杆３１ａはマスタシリンダ
３１Ａの上壁４１から突出し、かつ、図示しないプレー
ト（車両支持台）用取付け部（ロッドヘット）４２を有
する大径の突出先端部４３と、この突出先端部４３に鉛
直状態に連設する同径中間部４４と、この同径中間部４
４の下端部に鉛直状態に連設する小径の棒状ガイド部
（下端部）４５とから成る。As a result, the operating rods 31a, 32a of both cylinders 31A, 32A are raised synchronously. On the other hand, when the operating rods 31a, 32a are lowered, the lowering valve 37A is opened, and the pressure oil is caused to flow backward by the weight of the vehicle. Note that reference numeral 3
9 and 39 are filters. (3) Main Part of the Present Invention Here, the main part of the present invention will be described with reference to FIGS. 2 and 3. As described above, 31a is the master cylinder 31
This is the operating rod of A. The operating rod 31a projects from the upper wall 41 of the master cylinder 31A, and has a large-diameter projecting tip portion 43 having a plate (vehicle support base) mounting portion (rod head) 42 (not shown). The same-diameter intermediate portion 44 and the same-diameter intermediate portion 4 that are continuously provided in the state
4, a rod-shaped guide portion (lower end portion) 45 having a small diameter, which is continuously connected to the lower end portion 4 in a vertical state.
【００１５】しかして、前記棒状ガイド部４５には、内
外の複数個のパッキン４７を有する可動ピストン４６が
所要のストロークＡを有して昇降可能に嵌合している。
棒状ガイド部４５は筒状可動ピストン４６の中心孔４８
を貫通し、その突出下端部のオネジには止め具４９が螺
合している。５０は可動ピスト４６と対向するようにマ
スタシリンダ３１Ａ内の上部に固定的に設けられたシー
ルド部材である。このシールト部材５０も可動ピストン
４６と同様に筒状に形成され、かつ、内外の複数個のパ
ッキン５１を備えている。作動杆３１ａの同径中間部４
４は、この筒状シールド部材５０を摺動することができ
るように貫通している。A movable piston 46 having a plurality of packings 47 inside and outside is fitted in the rod-shaped guide portion 45 so as to be movable up and down with a required stroke A.
The rod-shaped guide portion 45 is a central hole 48 of the cylindrical movable piston 46.
And a stopper 49 is screwed to the male screw at the lower end of the protrusion. Reference numeral 50 denotes a shield member fixedly provided on the upper portion of the master cylinder 31A so as to face the movable pistol 46. This seal member 50 is also formed in a tubular shape like the movable piston 46, and is provided with a plurality of packings 51 inside and outside. Intermediate part 4 with the same diameter of the operating rod 31a
4 penetrates so that this cylindrical shield member 50 can slide.
【００１６】したがって、可動ピストン４６の下面側が
マスタシリンダの下室３１ｂになるのに対し、可動ピス
トン４６の上面側とシールト部材５０の下面側の空間が
マスタシリンダの上室３１ｃになる。Therefore, while the lower surface side of the movable piston 46 becomes the lower chamber 31b of the master cylinder, the space between the upper surface side of the movable piston 46 and the lower surface of the seal member 50 becomes the upper chamber 31c of the master cylinder.
【００１７】（４）主要部の作用
図４を参照に第１実施例の作用について説明する。まず
図２で示すように、マスタシリンダ３１Ａの作動杆３１
ａに装着された可動ピストン４６は、上昇用バルブ３５
Ａが開く前の初期位置（作動杆の最下降時）に於いて、
同径中間部４４の下端面４４ａと可動ピストン４６の上
端面４６ａとの間に「所要のストロークＡ」を有する。
ここで「所要のストロークＡ」とは、マスタシリンダ３
１Ａ側のロッドヘット４２の上昇時点と、サブシリンダ
３２Ａ側のロッドヘット６２の上昇時点を同期させるた
めの上昇距離を言う。(4) Operation of main part The operation of the first embodiment will be described with reference to FIG. First, as shown in FIG. 2, the operating rod 31 of the master cylinder 31A is
The movable piston 46 attached to a is mounted on the lifting valve 35.
At the initial position before A opens (when the operating rod is at the lowest position),
There is a "required stroke A" between the lower end surface 44a of the same-diameter intermediate portion 44 and the upper end surface 46a of the movable piston 46.
Here, the "required stroke A" means the master cylinder 3
The rising distance for synchronizing the rising time of the rod head 42 on the 1A side and the rising time of the rod head 62 on the sub-cylinder 32A side.
【００１８】したがって、図４の上方に示す説明図のよ
うに、今仮に上昇用バルブ３５Ａが開いた時（初期
時）、マスタシリンダ３１Ａの下室３１ｂに第１作動油
ａが入り込み、その結果、矢印で示すように、可動ピス
トン４６が作動杆３１ａのストッパーとしての下端面４
４ａまでスライド上昇しても、その間作動杆３１ａの先
端部４３或いはロッドヘット４２の位置は、サブシリン
ダ３２の作動杆３２ａの先端部５３或いはロッドヘット
６２と一致している。Therefore, as shown in the upper diagram of FIG. 4, when the rising valve 35A is opened (at the initial stage), the first hydraulic oil a enters the lower chamber 31b of the master cylinder 31A, and as a result, As indicated by the arrow, the movable piston 46 has a lower end surface 4 as a stopper of the operating rod 31a.
Even if it slides up to 4a, the position of the tip portion 43 of the operating rod 31a or the rod head 42 during that time coincides with the tip portion 53 of the operating rod 32a of the sub-cylinder 32 or the rod head 62.
【００１９】つまり、両作動杆３１ａ，３２ａに関する
初期の水平ラインＬは、可動ピストン４６のみが移動す
るので、そのまま一致している。この初期時に可動ピス
トン４６が多少上昇し始めると、油圧同調回路３３Ａを
介してサブシリンダ３２の下室３２ｂに第２作動油ｂが
流れ込み、サブシリンダ３２の作動杆３２ａの下端部に
固定的に設けられたサブピストン５６に予備的な圧力が
掛かる。That is, the initial horizontal line L relating to both operating rods 31a and 32a remains the same because only the movable piston 46 moves. When the movable piston 46 starts to rise to some extent at this initial stage, the second hydraulic oil b flows into the lower chamber 32b of the sub-cylinder 32 via the hydraulic tuning circuit 33A, and is fixedly fixed to the lower end of the operating rod 32a of the sub-cylinder 32. Preliminary pressure is applied to the provided sub-piston 56.
【００２０】したがって、その分、直列同調特有のサブ
側のタイミナング遅れを解消することができる。それ故
に、図４の下方は、マスタシリンダ３１Ａの作動杆３１
ａ並びにサブシリンダ３２Ａの作動杆３２ａに同期的な
圧力が掛かり、その結果、上昇中の水平ラインＬ１が常
に一致していることを示す。Therefore, the timing delay on the sub side peculiar to the series tuning can be eliminated accordingly. Therefore, the lower part of FIG. 4 shows the operating rod 31 of the master cylinder 31A.
It is shown that synchronous pressure is applied to a and the operating rod 32a of the sub-cylinder 32A, and as a result, the ascending horizontal line L1 is always in agreement.
【００２１】[0021]
【実施例】第１実施例の要旨は、リフトの作動杆３１
ａ，３２ａの上昇時に於いて、サブシリンダ３２Ａの作
動杆３２ａのサブピストン５６に予備的な圧力が掛かる
までの間、マスタシリンダ３１Ａの可動ピストン４６の
みを多少上昇移動させることである。第１実施例では、
マスタシリンダ３１Ａの作動杆３１ａの上昇時点と、サ
ブシリンダ３２Ａの作動杆３２ａと上昇時点を同期させ
るために、可動ピントン４６を「所要のストロークＡ」
だけスライド上昇させている。Embodiment The gist of the first embodiment is that the lift operating rod 31
During the ascent of a and 32a, only the movable piston 46 of the master cylinder 31A is slightly moved upward until the sub-piston 56 of the actuating rod 32a of the sub-cylinder 32A is subjected to preliminary pressure. In the first embodiment,
In order to synchronize the rising time of the operating rod 31a of the master cylinder 31A and the rising time of the operating rod 32a of the sub-cylinder 32A, the movable pinton 46 is moved to the "required stroke A".
Only slide up.
【００２２】したがって、図５で示すようにマスタシリ
ンダ３１Ａ側の作動杆３１ａの下端部４５Ａをその上端
部と同径にした上で、該下端部４５Ａにストッパーとし
てのフランジ１０を設け、これに可動ピストン４６Ａの
上端面４６ａを当接させても良い。Therefore, as shown in FIG. 5, the lower end portion 45A of the actuating rod 31a on the master cylinder 31A side has the same diameter as the upper end portion thereof, and the lower end portion 45A is provided with the flange 10 as a stopper. The upper end surface 46a of the movable piston 46A may abut.
【００２３】以下、この欄では、特定発明と目的が共通
する第２実施例について説明する。なお、第２の実施例
の説明に当たって、前記第１実施例と同一の部分には同
一の符号を付し、重複説明を省略する。In the following, in this section, a second embodiment having the same purpose as the specified invention will be described. In the description of the second embodiment, the same parts as those in the first embodiment will be designated by the same reference numerals, and duplicate description will be omitted.
【００２４】図６ないし図８は、第２実施例の油圧同調
リフトＸ２である。このリフトＸ２が第１実施例の油圧
同調リフトＸ１と主に異なる点は、マスタシリンダ３１
Ａの作動杆３１ａの下端部に装着したピストンは、可動
ピントンではなく、固定ピストン４６Ｂである。6 to 8 show a hydraulic synchronizing lift X2 of the second embodiment. The main difference between this lift X2 and the hydraulic synchronization lift X1 of the first embodiment is that the master cylinder 31
The piston attached to the lower end of the operating rod 31a of A is not the movable pinton but the fixed piston 46B.
【００２５】そこで、ロッドヘット４２Ｂの筒状の取付
け部本体１１に、作動杆３１ａの突出先端部４３がスラ
イド嵌合する下端開口の筒状嵌合部１２を形成してい
る。この筒状嵌合部１２は、ロッドヘット４２Ｂの筒状
取付け部１１の中央部に交差状態に設けられ、かつ、半
径方向に固定手段（固定ボルト）１３用の貫通小孔１
４，１４を有している。そして、該筒状嵌合部１２には
垂直案内長孔１５を有する作動杆３１ａの突出先端部４
３が嵌入し、また前記固定ボルト１３が垂直案内長孔１
５を貫通している。Therefore, the cylindrical fitting portion main body 11 of the rod head 42B is formed with a cylindrical fitting portion 12 having a lower end opening into which the protruding tip end portion 43 of the operating rod 31a is slidably fitted. The tubular fitting portion 12 is provided in the central portion of the tubular mounting portion 11 of the rod head 42B in an intersecting state, and the through small hole 1 for the fixing means (fixing bolt) 13 is provided in the radial direction.
It has 4,14. Then, the protruding end portion 4 of the operating rod 31a having the vertical guide elongated hole 15 in the tubular fitting portion 12 is formed.
3 is inserted, and the fixing bolt 13 is attached to the vertical guide elongated hole 1
Penetrates 5
【００２６】上記のように構成すると、作動杆３１ａの
先端部４３の上端面２２と筒状嵌合部１２の内壁上面１
６との間に「所要のストロークＡ」を設けることができ
るので、本発明の特定発明（第１実施例）と同様に同一
の目的を達成することができる。With the above construction, the upper end surface 22 of the tip end portion 43 of the operating rod 31a and the upper surface 1 of the inner wall of the tubular fitting portion 12 are formed.
Since the "required stroke A" can be provided between the same and the No. 6, it is possible to achieve the same object as in the specific invention (first embodiment) of the present invention.
【００２７】図８は第２実施例の作用を概略的に示す。
この図８から明らかなように、今仮にマスタシリンダ３
１Ａの下室３１ｂに第１作動油ａが入り込み、その結
果、矢印で示すように下端部に固定ピストン４６Ｂを有
する作動杆３１ａのみが上昇し、その上端面２２が筒状
嵌合部１２の内壁上面１６に至って（嵌合部１２内をス
ライド上昇して）も、マスタシリンダ側のロッドヘット
４２Ｂの位置は、サブシリンダ３２Ａ側のロッドヘット
６２と一致している。それ故に、第２実施例の作用・効
果は第１実施例と同一である。FIG. 8 schematically shows the operation of the second embodiment.
As is clear from FIG. 8, the master cylinder 3
The first hydraulic oil a enters into the lower chamber 31b of 1A, and as a result, only the operating rod 31a having the fixed piston 46B at the lower end thereof rises as shown by the arrow, and the upper end surface 22 of the operating rod 31a has Even when reaching the inner wall upper surface 16 (sliding up in the fitting portion 12), the position of the rod head 42B on the master cylinder side matches the rod head 62 on the sub cylinder 32A side. Therefore, the operation and effect of the second embodiment are the same as those of the first embodiment.
【００２８】なお、上記第２実施例に於いて、他の構成
要件を加味しても良い。例えば図９及び図１０は、「所
要のストロークＡ」を得るために、ロッドヘット４２Ｂ
の取付け部本体１１にストローク調整手段（調整ボル
ト）２０を螺合している。このストローク調整手段２０
は、取付け部本体１１に形成した少なくとも一つ以上の
メネジ２１と螺合し、かつ、マスタシリンダ３１Ａの作
動杆３１ａの上端面２２と当接している。In the second embodiment, other constituent elements may be added. For example, FIGS. 9 and 10 show a rod head 42B to obtain the "required stroke A".
A stroke adjusting means (adjusting bolt) 20 is screwed into the mounting portion main body 11 of. This stroke adjusting means 20
Is threadedly engaged with at least one female screw 21 formed on the mounting portion main body 11 and is in contact with the upper end surface 22 of the operating rod 31a of the master cylinder 31A.
【００２９】ところで、前述した特定発明（第１実施
例）並びに第２実施例の利用発明をここに開示する。The specific invention (first embodiment) and the invention utilizing the second embodiment described above are disclosed herein.
【００３０】図１1及び図１２に示す第３実施例は、第
１実施例の利用発明である、この第３実施例は、特定発
明の主要部をそのまま含み、他の発明の目的を満足させ
るために弾性体７０等構成要件を加味した。The third embodiment shown in FIGS. 11 and 12 is an invention utilizing the first embodiment. This third embodiment includes the main part of the specified invention as it is, and satisfies the objects of other inventions. Therefore, the constituent requirements such as the elastic body 70 are added.
【００３１】しかして、符号７０は、図１２で示すよう
に可動ピスト４６Ａの突起状バネ支持部７１に下端部７
０ａが支持され、一方、上端部はフランジ０Ａに当接す
る弾性体７０である。しかし、この弾性体７０を設けた
場合には、何らかのチェック弁が必要である。そこで、
符号７２は、図１１で示すように油圧同調回路（配管）
３３Ａと作動油供給源７３とを結ぶ補充配管に設けたチ
ェック弁である。As shown in FIG. 12, the reference numeral 70 indicates the lower end portion 7 of the protruding spring support portion 71 of the movable pistol 46A.
0a is supported, while the upper end is an elastic body 70 that abuts the flange 0A. However, when this elastic body 70 is provided, some kind of check valve is required. Therefore,
Reference numeral 72 is a hydraulic pressure tuning circuit (piping) as shown in FIG.
It is a check valve provided in a replenishment pipe connecting 33A and the hydraulic oil supply source 73.
【００３２】上記構成にあっては、本発明の目的の他
に、「油圧同調回路（配管）３３Ａの中の作動油が不足
した場合、作動杆３１ａの下限位置で、前記弾性体７０
のバネ力により、該配管３３Ａ内が負圧になるので、チ
ェック弁７２を介して適量の作動油を自動的に補充する
ことができるという目的」を達成することができる。In addition to the object of the present invention, in the above construction, "when the hydraulic oil in the hydraulic pressure tuning circuit (piping) 33A is insufficient, the elastic member 70 is placed at the lower limit position of the operating rod 31a.
Since the inside of the pipe 33A has a negative pressure due to the spring force of No. 3, it is possible to achieve the "objective of being able to automatically replenish an appropriate amount of hydraulic oil via the check valve 72".
【００３３】したがって、図１３及び図１４は、第２実
施例の利用発明（ここでは第４実施例）ではあるが、同
様の理由により、マスタシリンダ３１Ａの作動杆３１ａ
の上端面２２とロッドヘット４２Ｂの筒状嵌合部１２の
内壁上面１６との間に弾性体７０Ａを介在させ、一方、
油圧同調回路（配管）３３Ａと作動油供給源７３とを結
ぶ補充配管にチェック弁７２Ａを設けてある。なお、前
記作動杆３１ａの上端面２２には、バネ支持部７１Ａが
突設されている。Therefore, although FIG. 13 and FIG. 14 show the invention of utilizing the second embodiment (here, the fourth embodiment), for the same reason, the operating rod 31a of the master cylinder 31A is used.
The elastic body 70A is interposed between the upper end surface 22 of the rod and the inner wall upper surface 16 of the tubular fitting portion 12 of the rod head 42B, while
A check valve 72A is provided in a supplementary pipe connecting the hydraulic pressure tuning circuit (pipe) 33A and the hydraulic oil supply source 73. A spring support portion 71A is projectingly provided on the upper end surface 22 of the operating rod 31a.
【００３４】[0034]
【発明の効果】以上の説明から明らかなように、本発明
の第１実施例にあっては、極力、リフトの構成部品点数
を増やすことなく、簡単な機構と合理的手段により、直
列同調特有のサブ側のタイミナング遅れを解消すること
ができる。また、「油圧同調回路（配管）３３Ａの中の
作動油が不足した場合、作動杆３１ａの下限位置で、弾
性体７０のバネ力により、該配管３３Ａ内が負圧になる
ので、チェック弁７２を介して適量の作動油を自動的に
補充することができるという目的」も達成することがで
きる。As is apparent from the above description, in the first embodiment of the present invention, the number of component parts of the lift is maximized.
With a simple mechanism and rational means,
Eliminating the delay on the sub-side which is peculiar to column tuning
You can Also, in the "hydraulic tuning circuit (piping) 33A
If the hydraulic oil is insufficient, at the lower limit position of the operating rod 31a,
Due to the spring force of the body 70, the inside of the pipe 33A becomes negative pressure.
Therefore, a proper amount of hydraulic oil is automatically supplied through the check valve 72.
The purpose of being able to replenish ”
Can .
【００３５】又、本発明の第２実施例にあっては、マス
タシリンダ３１Ａの作動杆３１ａの先端部４３にロッド
ヘット４２Ｂの筒状嵌合部１２を嵌合し、該嵌合部１２
の内壁上面１６と作動杆３１ａの上端面２２との間に所
要のストロークＡを設定し、下端部に固定ピストン４６
Ｂを有する作動杆３１ａは、油圧回路の上昇用バルブ３
５Ａが開いた初期時、第１作動油ａにより作動杆３１ａ
のみが前記嵌合部１２をスライド上昇するので、作動杆
３１ａが嵌合部１２内を上昇し始めると、油圧同調回路
３３Ａを介してサブシリンダ３２の下室３２ｂに第２作
動油ｂが流れ込む。したがって、第２実施例も第１実施
例と同様な主たる作用・効果を得ることができる。Further, in the second embodiment of the present invention, the cylindrical fitting portion 12 of the rod head 42B is fitted to the tip end portion 43 of the operating rod 31a of the master cylinder 31A, and the fitting portion 12 is fitted.
A required stroke A is set between the upper surface 16 of the inner wall of the rod and the upper end surface 22 of the operating rod 31a, and the fixed piston 46 is attached to the lower end.
The operating rod 31a having B is a valve 3 for raising the hydraulic circuit.
At the initial stage when 5A is opened, the operating rod 31a is operated by the first hydraulic oil a.
Since only one slides up the fitting portion 12, when the operating rod 31a starts rising in the fitting portion 12, the second hydraulic oil b flows into the lower chamber 32b of the sub cylinder 32 via the hydraulic pressure tuning circuit 33A. . Therefore, the second embodiment can also obtain the same main operation and effect as the first embodiment.
【００３６】そして、本発明の主たる目的は、マスタシ
リンダ側の作動杆の下端部に可動ピストンを摺動自在に
嵌着することにより、又はマスタシリンダ側の作動杆の
ロッドヘットに筒状嵌合部を形成することにより達成す
ることができるので、リフトの構成部品点数を増やすこ
となく、簡単な機構と合理的手段により、この種のリフ
トが抱えている問題点を解決することができる。The main object of the present invention is to make a movable piston slidably fitted to the lower end of the working rod on the master cylinder side, or to provide a cylindrical fitting portion on the rod head of the working rod on the master cylinder side. Since it can be achieved by forming the above, it is possible to solve the problems of this type of lift by a simple mechanism and rational means without increasing the number of components of the lift.
図１乃至図１４は本発明の各実施例を示す概略説明図で
ある。図１５従来の実施例の概略説明図である。1 to 14 are schematic explanatory views showing each embodiment of the present invention. 15 is a schematic explanatory diagram of a conventional example.
【図１】本発明の実施形態（第１実施例）を示す概略説
明図。FIG. 1 is a schematic explanatory view showing an embodiment (first example) of the present invention.
【図２】図１に於いて、主要部の概略説明図。FIG. 2 is a schematic explanatory diagram of a main part in FIG.
【図３】図１に於いて、主要部の分解斜視図（一部切欠
している）。FIG. 3 is an exploded perspective view (partially cut away) of a main portion in FIG.
【図４】図１に於いて、作用を示す説明図。FIG. 4 is an explanatory view showing an operation in FIG.
【図５】第１実施例の主要部を設計変更した説明図。FIG. 5 is an explanatory diagram in which the design of the main part of the first embodiment is changed.
【図６】本発明の第２実施例を示す図１と同様の図。FIG. 6 is a view similar to FIG. 1 showing a second embodiment of the present invention.
【図７】図６に於いて、主要部の分解斜視図。FIG. 7 is an exploded perspective view of a main part in FIG.
【図８】図６に於いて、作用を示す説明図。FIG. 8 is an explanatory view showing an operation in FIG.
【図９】第２実施例に構成要件を加味した概略断面説明
図。FIG. 9 is a schematic cross-sectional explanatory view in which constituent features are added to the second embodiment.
【図１０】図９に於いて、主要部の分解斜視図。FIG. 10 is an exploded perspective view of a main part in FIG.
【図１１】第３実施例を示す概略説明図。FIG. 11 is a schematic explanatory view showing a third embodiment.
【図１２】図１１に於いて、要部の説明図。FIG. 12 is an explanatory diagram of a main part in FIG. 11.
【図１３】第４実施例を示す概略説明図。FIG. 13 is a schematic explanatory view showing a fourth embodiment.
【図１４】図１３に於いて、要部の説明図。FIG. 14 is an explanatory diagram of a main part in FIG. 13.
【図１５】従来の一例を示す概略説明図。FIG. 15 is a schematic explanatory view showing a conventional example.
Ｘ１…油圧同調リフト、３１Ａ…マスタシリンダ、３２
Ａ…サブシリンダ、３３Ａ…油圧同調回路、３４Ａ…同
調補正回路、３５Ａ…上昇用バルブ、３６Ａ…ポンプ、
３７Ａ…下降用バルブ、３８Ａ…補正用バルブ、３１ａ
…マスタシリンダの作動杆、３２ａ…サブシリンダの作
動杆、３１ｂ…マスタシリンダの下室、３２ｂ…サブシ
リンダの下室、３１ｃ…マスタシリンダの上室、４１…
上壁、４２，４２Ｂ…マスタシリンダのロッドヘット、
６２…サブシリンダのロッドヘット、４３…作動杆３１
ａの突出先端部、４４…同径中間部、４５…棒状ガイド
部（下端部）、４５Ａ…下端部、４６，４６Ａ…可動ピ
ストン、１０…フランジ、１１…取付け部本体、１２…
嵌合部、１３…固定ボルト、１４…貫通小孔、１５…垂
直案内長孔、１６…内壁上面、２０…ストローク調整手
段、２２…作動杆の端面、Ａ…所要のストローク。X1 ... hydraulic pressure synchronized lift, 31A ... master cylinder, 32
A ... Sub-cylinder, 33A ... Hydraulic tuning circuit, 34A ... Tuning correction circuit, 35A ... Lifting valve, 36A ... Pump,
37A ... descent valve, 38A ... correction valve, 31a
... master cylinder operating rod, 32a ... sub-cylinder operating rod, 31b ... master cylinder lower chamber, 32b ... sub-cylinder lower chamber, 31c ... master cylinder upper chamber, 41 ...
Upper wall, 42, 42B ... Master cylinder rod head,
62 ... Rod head of sub-cylinder, 43 ... Operating rod 31
a protruding tip portion, 44 ... intermediate portion with the same diameter, 45 ... bar-shaped guide portion (lower end portion), 45A ... lower end portion, 46, 46A ... movable piston, 10 ... flange, 11 ... mounting portion main body, 12 ...
Fitting portion, 13 ... Fixing bolt, 14 ... Small through hole, 15 ... Vertical guide elongated hole, 16 ... Inner wall upper surface, 20 ... Stroke adjusting means, 22 ... End surface of operating rod, A ... Required stroke.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B66F 7/00 - 7/28 B65G 7/08 F15B 11/00 - 11/22 F15B 15/00 - 15/28 ─────────────────────────────────────────────────── ─── Continued Front Page (58) Fields surveyed (Int.Cl. 7 , DB name) B66F 7 /00-7/28 B65G 7/08 F15B 11/00-11/22 F15B 15/00-15 / 28
Claims (5)
同調回路を介して直列に接続されている油圧同調リフト
に於いて、前記マスタシリンダ３１Ａの作動杆３１ａの
下端部４５に、該作動杆３１ａに設けたストッパーと該
下端部４５にスライド嵌合する可動ピストン４６Ａとの
間にサブシリンダ側の遅れを補正することができるよう
に所要のストロークＡを設定し、また、可動ピストン４
６Ａと前記ストッパーとの間に弾性体７０を設けると共
に、油圧同調回路３３Ａ側に作動油を補充するチェック
弁７２を設け、油圧回路の上昇用バルブ３５Ａが開いた
初期時、第１作動 油ａにより可動ピストン４６Ａの
みがスライド上昇することを特徴とする油圧同調リフ
ト。1. In a hydraulic synchronizing lift in which a master cylinder and a sub-cylinder are connected in series via a hydraulic synchronizing circuit, a lower end portion 45 of an operating rod 31a of the master cylinder 31A is connected to the operating rod 31a. The stopper provided and
With the movable piston 46A that is slidably fitted to the lower end portion 45
So that the delay on the sub-cylinder side can be corrected
Set the predetermined stroke A to, also, the movable piston 4
If an elastic body 70 is provided between 6A and the stopper,
Then, check to add hydraulic oil to the hydraulic tuning circuit 33A side.
A hydraulic synchronizing lift characterized in that only the movable piston 46A is slid up by the first hydraulic oil a at the initial stage when the valve 72 for raising the hydraulic circuit is opened by providing the valve 72 .
同調回路を介して直列に接続されている油圧同調リフト
に於いて、前記マスタシリンダ３１Ａの作動杆３１ａの
先端部４３にロッドヘット４２Ｂに形成した筒状嵌合部
１２を嵌合し、また、該嵌合部１２の内壁上面１６と作
動杆３１ａの上端面２２との間にサブシリンダ側の遅れ
を補正することができるように所要のストロークＡを設
定し、下端部に固定ピストン４６Ｂを有する作動杆３１
ａは、油圧回路の上昇用バルブ３５Ａが開いた初期時、
第１作動油ａにより作動杆３１ａのみが前記嵌合部１２
をスライド上昇することを特徴とする油圧同調リフト。2. A cylinder formed in a rod head 42B at a tip portion 43 of an operating rod 31a of the master cylinder 31A in a hydraulic tuning lift in which a master cylinder and a sub-cylinder are connected in series via a hydraulic tuning circuit. Of the sub-cylinder side between the upper fitting surface 12 of the actuating rod 31a and the upper surface 16 of the inner wall of the fitting portion 12.
A required stroke A is set so that the operating rod 31 having a fixed piston 46B at its lower end can be corrected.
a is an initial value when the hydraulic valve raising valve 35A is opened,
Due to the first hydraulic oil a, only the operating rod 31a has the fitting portion 12
A hydraulic synchronized lift characterized by sliding up.
は、筒状の取付け部本体１１と、この取付け部本体１１
に交差状態に設けられ、かつ、固定手段１３用の貫通小
孔１４を有する筒状嵌合部１２とから成ることを特徴と
する油圧同調リフト。3. The rod head 42B according to claim 2.
Is a tubular mounting portion main body 11 and this mounting portion main body 11
And a tubular fitting portion 12 having a through small hole 14 for the fixing means 13, which is provided in an intersecting state with the hydraulic synchronizing lift.
を得るために、ロッドヘット４２Ｂの取付け部本体１１
に作動杆３１ａの上端面と当接するストローク調整手段
２０が螺合していることを特徴とする油圧同調リフト。4. The required stroke A according to claim 2.
To obtain the rod head 42B mounting portion main body 11
A hydraulic adjustment lift, characterized in that a stroke adjusting means (20) for contacting the upper end surface of the operating rod (31a) is screwed into the.
で、サブシリンダ側の遅れを補正するために、マスタシ
リンダ３１Ａの作動杆３１ａの上端面２２とロッドヘッ
ト４２Ｂの筒状嵌合部１２の内壁上面１６との間に弾性
体７０Ａを介在させ、一方、油圧同調回路３３Ａ側に作
動油を補充するチェック弁７２Ａを設けたことを特徴と
する油圧同調リフト。5. The cylindrical fitting portion of the rod head 42B and the upper end surface 22 of the operating rod 31a of the master cylinder 31A in order to correct the delay on the sub-cylinder side at a lower position of the operating rod. An elastic body 70A is interposed between the upper surface 16 of the inner wall 12 and the inner wall upper surface 16, while a check valve 72A for replenishing hydraulic oil is provided on the hydraulic tuning circuit 33A side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001124545A JP3503825B2 (en) | 2001-04-23 | 2001-04-23 | Hydraulic synchronized lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001124545A JP3503825B2 (en) | 2001-04-23 | 2001-04-23 | Hydraulic synchronized lift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002316792A JP2002316792A (en) | 2002-10-31 |
| JP3503825B2 true JP3503825B2 (en) | 2004-03-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001124545A Expired - Fee Related JP3503825B2 (en) | 2001-04-23 | 2001-04-23 | Hydraulic synchronized lift |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3503825B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100971190B1 (en) | 2009-11-09 | 2010-07-20 | 차현남 | The apparatus of same time pulling and downing with jpc chn flow dividers in structure |
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2001
- 2001-04-23 JP JP2001124545A patent/JP3503825B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002316792A (en) | 2002-10-31 |
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