JPH06117414A - Valve gear - Google Patents
Valve gearInfo
- Publication number
- JPH06117414A JPH06117414A JP4286613A JP28661392A JPH06117414A JP H06117414 A JPH06117414 A JP H06117414A JP 4286613 A JP4286613 A JP 4286613A JP 28661392 A JP28661392 A JP 28661392A JP H06117414 A JPH06117414 A JP H06117414A
- Authority
- JP
- Japan
- Prior art keywords
- passage
- pilot
- valve
- pressure
- laminated
- 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.)
- Granted
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、マニホールドの側面上
に積層配設した積層形制御弁の最上段に位置するパイロ
ット操作の積層形切換弁を作動操作するパイロット電磁
弁をマニホールドに配設し、圧力源に接続する供給通路
を流れる流体を複数段に減圧制御する弁装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a pilot solenoid valve for operating a pilot operated laminated type switching valve located at the uppermost stage of a laminated type control valve laminated on the side surface of a manifold. , A valve device for controlling the pressure of a fluid flowing through a supply passage connected to a pressure source in a plurality of stages.
【０００２】[0002]
【従来の技術】従来、この種の弁装置として実開平３−
１２５９０１号公報に示されるものがある。このもの
は、圧力源に接続する供給通路と低圧側に接続する戻り
通路とアクチュエータに接続する２個の出力通路とパイ
ロット流体を流す第１パイロット通路を有する第１単位
体と、供給通路と戻り通路と第２パイロット通路を有す
る第２単位体とを、各供給通路と各戻り通路とがそれぞ
れ連通するよう接合してマニホールドを構成し、マニホ
ールドの第１単位体上に第１単位体の各通路と連通する
よう通路を貫設し供給通路に連通する通路を流れる流体
をパイロット圧に応じて減圧制御するパイロット操作の
減圧主弁を積層配設し、減圧主弁の各通路と連通する通
路を有し第１パイロット通路を流れるパイロット流体の
給排により２個の出力通路に連通する通路を供給通路に
連通する通路と戻り通路に連通する通路とに切換連通す
るパイロット操作の第１積層形切換弁を減圧主弁上に積
層配設して最上段に位置し、第１積層形切換弁を作動操
作するよう第１パイロット通路にパイロット流体を供給
したり第１パイロット通路のパイロット流体を排出した
りする第１パイロット電磁弁をマニホールドの第１単位
体に配設し、マニホールドの第２単位体上には、第１単
位体上に積層配設した減圧主弁とパイプにより接続して
減圧主弁のパイロット圧を導入するスペーサと、スペー
サに導入した減圧主弁のパイロット圧をそれぞれ設定可
能な複数のパイロット弁を有する減圧パイロット弁と、
第２パイロット通路を流れるパイロット流体の給排によ
り減圧パイロット弁の複数のパイロット弁のいずれかを
減圧主弁に切換連通するパイロット操作の第２積層形切
換弁とを積層配設し、第２積層形切換弁を作動操作する
よう第２パイロット通路にパイロット流体を供給したり
第２パイロット通路のパイロット流体を排出したりする
第２パイロット電磁弁をマニホールドの第２単位体に配
設している。2. Description of the Related Art Conventionally, a valve device of this type has been used as a practical device.
There is one disclosed in Japanese Patent No. 125901. This is a first unit having a supply passage connected to a pressure source, a return passage connected to a low pressure side, two output passages connected to an actuator, and a first pilot passage through which a pilot fluid flows, a supply passage and a return passage. A manifold is constructed by joining a passage and a second unit body having a second pilot passage so that each supply passage and each return passage communicate with each other, and each manifold is formed on the first unit body of the manifold. A passage that has a pilot-operated pressure-reducing main valve that is arranged in layers so as to communicate with the passage and that reduces the pressure of the fluid flowing through the passage that communicates with the supply passage according to the pilot pressure, and that communicates with each passage of the pressure-reducing main valve. And a passage for communicating with the two output passages by supplying and discharging the pilot fluid flowing through the first pilot passage into a passage communicating with the supply passage and a passage communicating with the return passage. The first laminated type switching valve for operation is arranged on the pressure reducing main valve in a laminated manner and is located at the uppermost stage, and the pilot fluid is supplied to the first pilot passage or the first pilot passage so as to operate the first laminated type switching valve. A pressure reducing main valve in which a first pilot solenoid valve for discharging pilot fluid in a pilot passage is arranged in a first unit body of a manifold, and is laminated on a second unit body of the manifold on the first unit body. And a spacer connected by a pipe to introduce the pilot pressure of the pressure reducing main valve, and a pressure reducing pilot valve having a plurality of pilot valves each capable of setting the pilot pressure of the pressure reducing main valve introduced into the spacer,
A pilot-operated second stack type switching valve that switches and communicates any one of the plurality of pilot valves of the pressure reducing pilot valve to the pressure reducing main valve by supplying and discharging the pilot fluid flowing through the second pilot passage is stacked and arranged. A second pilot solenoid valve that supplies pilot fluid to the second pilot passage and discharges pilot fluid from the second pilot passage to operate the type switching valve is disposed in the second unit body of the manifold.
【０００３】そして、第１パイロット電磁弁の作動によ
り第１積層形切換弁が２個の出力通路を供給通路と排出
通路とに切換連通してアクチュエータを作動制御し、第
２パイロット電磁弁の作動により第２積層形切換弁が複
数のパイロット弁のいずれかを減圧主弁に切換連通して
供給通路の流体を切換連通したパイロット弁により設定
されるパイロット圧に減圧制御し、供給通路より出力通
路を流れてアクチュエータに供給する流体を複数段に減
圧制御できるよう設けている。When the first pilot solenoid valve is actuated, the first laminated type switching valve switches the two output passages to the supply passage and the discharge passage to communicate with each other to control the operation of the actuator. The second stacking type switching valve switches and communicates any one of the plurality of pilot valves to the pressure reducing main valve to control the fluid in the supply passage to reduce the pilot pressure to the pilot pressure set by the pilot valve. It is provided so that the pressure of the fluid flowing through and flowing to the actuator can be controlled in multiple stages.
【０００４】[0004]
【発明が解決しようとする課題】ところが、かかる弁装
置の構成では、アクチュエータの速度制御を行う機能
と、供給通路と一方の出力通路が切換連通した時のみに
減圧制御を行う機能との両方を得ようとする場合には、
減圧主弁のパイロット圧として減圧主弁に有する一方の
出力通路に連通する通路の圧力を用いるため、アクチュ
エータの速度制御を行うよう一方の出力通路を絞り制御
する積層形制御弁の一つである積層形絞り弁をマニホー
ルドの第１単位体上に減圧主弁より下段に積層配設して
一方の出力通路が戻り通路と切換連通した時に絞り制御
による一方の出力通路の背圧がパイロット圧として減圧
主弁に作用しないようにしなければならず、減圧主弁の
積層位置が高くなり減圧主弁と第２単位体上に積層配設
したスペーサとを接続するパイプが長くなって省配管化
を図れない問題点があった。本発明は、かかる問題点を
解決するもので、マニホールドの側面上に積層配設した
積層形減圧弁と最上段に積層配設した積層形切換弁との
間に積層形制御弁を介在して積層可能にして積層形減圧
弁の積層位置を不変にし、アクチュエータの速度制御を
行う機能と供給通路と一方の出力通路が切換連通した時
のみに減圧制御を行う機能との両方を得ることが可能な
弁装置を提供するものである。However, in the structure of such a valve device, both the function of controlling the speed of the actuator and the function of performing the pressure reduction control only when the supply passage and one of the output passages are switched and communicated with each other. If you want to get
Since the pressure in the passage communicating with one of the output passages of the pressure reducing main valve is used as the pilot pressure of the pressure reducing main valve, it is one of the laminated control valves that throttles one output passage to control the speed of the actuator. The laminated throttle valve is laminated on the first unit body of the manifold below the pressure reducing main valve, and when one output passage is switched and communicated with the return passage, the back pressure of one output passage by throttle control is used as the pilot pressure. It is necessary to prevent the pressure reducing main valve from acting, the stacking position of the pressure reducing main valve becomes high, and the pipe connecting the pressure reducing main valve and the spacers laminatedly arranged on the second unit body becomes long to save piping. There was a problem that could not be planned. The present invention solves such a problem by interposing a laminated control valve between the laminated pressure reducing valve laminated on the side surface of the manifold and the laminated switching valve laminated on the uppermost stage. It is possible to stack and make the stacking position of the stacking type pressure reducing valve invariable, and it is possible to obtain both the function of controlling the speed of the actuator and the function of reducing the pressure only when the supply passage and one output passage are switched and connected. The present invention provides a simple valve device.
【０００５】[0005]
【課題を解決するための手段】このため本発明は、圧力
源に接続する供給通路と低圧側に接続する戻り通路とア
クチュエータに接続する２個の出力通路とパイロット流
体を流すパイロット通路とを開口した取付面を長手方向
へ隔てて同一側面に複数個形成したマニホールドと、マ
ニホールドの２個の取付面上に跨って積層配設し跨った
一方の取付面に開口した各通路と連通するよう通路を貫
設した積層形減圧弁と、積層形減圧弁上に積層形減圧弁
に貫設した各通路と連通するよう通路を貫設した積層形
制御弁を介在可能にして最上段に積層配設し、パイロッ
ト通路を流れるパイロット流体の給排により一方の取付
面に開口した２個の出力通路を供給通路と戻り通路とに
切換連通するパイロット操作の積層形切換弁と、マニホ
ールドに配設して積層形切換弁を作動操作するよう積層
形減圧弁が跨った一方の取付面に開口したパイロット通
路にパイロット流体を供給したりこのパイロット通路の
パイロット流体を排出したりする第１パイロット電磁弁
と、マニホールドに配設して積層形減圧弁が跨った他方
の取付面に開口したパイロット通路にパイロット流体を
供給したりこのパイロット通路のパイロット流体を排出
したりする第２パイロット電磁弁とを具備し、積層形減
圧弁は弁本体の内部へ摺動自在に嵌挿した主弁体に主弁
体の下流側の供給通路に連通する通路の圧力をパイロッ
ト圧として作用して設けると共に、このパイロット圧を
絞りを介し主弁体に対向して作用して設けて主弁体の下
流側の供給通路に連通する通路を流れる流体をパイロッ
ト圧に応じて減圧制御して設け、絞りを介して主弁体に
作用するパイロット圧をそれぞれ設定可能な複数のパイ
ロット弁を弁本体に配設し、マニホールドに配設の第２
パイロット電磁弁の作動によりパイロット流体が給排さ
れるパイロット通路に連通してこのパイロット流体の給
排により複数のパイロット弁のいずれかを主弁体に切換
連通するパイロット操作の切換弁を弁本体に配設し、マ
ニホールドに配設の第１パイロット電磁弁の作動により
開閉操作されてその開操作により主弁体にパイロット圧
を作用させると共にその閉操作により主弁体にパイロッ
ト圧を作用させないようパイロット操作の開閉弁を弁本
体に配設し、開閉弁と並列的に主弁体にパイロット圧を
作用させる作用通路を設け、作用通路を閉塞自在に設け
て成る。Therefore, according to the present invention, a supply passage connected to a pressure source, a return passage connected to a low pressure side, two output passages connected to an actuator, and a pilot passage through which a pilot fluid flows are opened. A plurality of mounting surfaces that are formed on the same side surface with the mounting surfaces separated from each other in the longitudinal direction, and a passage that communicates with each of the passages that are stacked in two manifold mounting surfaces It is possible to interpose a laminated control valve having a passage through which a passage is provided so that it can be communicated with each passage provided through the laminated pressure reducing valve on the laminated pressure reducing valve. The pilot-operated laminated switching valve for switching and connecting the two output passages opened on one mounting surface to the supply passage and the return passage by supplying and discharging the pilot fluid flowing through the pilot passage and the manifold are arranged. A first pilot solenoid valve for supplying pilot fluid to the pilot passage opened to one mounting surface straddled by the laminated pressure reducing valve so as to operate the stratified switching valve and for discharging the pilot fluid in this pilot passage; And a second pilot solenoid valve for supplying pilot fluid to the pilot passage opened to the other mounting surface which is disposed on the manifold and straddled by the laminated pressure reducing valve, and for discharging the pilot fluid in this pilot passage, The laminated pressure reducing valve is installed by sliding the main valve body that is slidably inserted into the valve body by using the pressure of the passage communicating with the supply passage on the downstream side of the main valve body as the pilot pressure. A fluid that flows through a passage communicating with the main valve body through a throttle and communicating with the main valve body's downstream supply passage is pressure-controlled according to the pilot pressure. It disposed a pilot pressure acting a plurality of pilot valves which can be set to the valve body to the main valve body through a second disposed manifold
A pilot operated switching valve is connected to the pilot passage through which pilot fluid is supplied and discharged by the operation of the pilot solenoid valve, and one of a plurality of pilot valves is switched to the main valve body by supplying and discharging this pilot fluid. The pilot pilot valve is installed and operated to open and close by the operation of the first pilot solenoid valve installed in the manifold, and the pilot operation prevents the pilot pressure from acting on the main valve body by the opening operation and the closing operation. An on-off valve for operation is provided in the valve body, an operation passage for applying pilot pressure to the main valve body is provided in parallel with the on-off valve, and the operation passage is provided so as to be freely closed.
【０００６】[0006]
【作用】かかる本発明の構成において、アクチュエータ
の速度制御を行う機能と、供給通路と一方の出力通路が
切換連通した時のみに減圧制御を行う機能との両方を得
ようとする場合には、一方の出力通路を絞り制御する積
層形制御弁の一つである積層形絞り弁を積層形減圧弁と
積層形切換弁との間に介在して積層配設すると共に、積
層形減圧弁の作用通路を閉塞する。そして、第１パイロ
ット電磁弁の作動により積層形切換弁が２個の出力通路
の一方を供給通路に切換連通して他方を戻り通路に切換
連通すると、開閉弁が開操作されてパイロット圧を主弁
体に作用し、主弁体は作用したパイロット圧が第２パイ
ロット電磁弁の作動により切換連通したパイロット弁に
より設定されて主弁体の下流側の供給通路に連通する通
路を流れる流体をパイロット圧に減圧制御する。また、
第１パイロット電磁弁の作動により積層形切換弁が２個
の出力通路の他方を供給通路に切換連通して一方を排出
通路に切換連通すると、開閉弁が閉操作されてパイロッ
ト圧を主弁体に作用せず、主弁体は減圧制御しない。そ
して、常に減圧制御を得ようとする場合には、作用通路
の閉塞を解除する。これにより、主弁体には開閉弁の開
閉操作にかかわりなく作用通路を介してパイロット圧が
作用して２個の出力通路のいずれが供給通路に切換連通
しても減圧制御を行う。このため、積層形減圧弁の積層
位置を不変にして、アクチュエータの速度制御を行う機
能と供給通路と一方の出力通路が切換連通した時のみに
減圧制御を行う機能との両方を得ることが可能にでき
る。In the structure of the present invention, in order to obtain both the function of controlling the speed of the actuator and the function of controlling the pressure reduction only when the supply passage and one of the output passages are switched and communicated with each other, A laminated throttle valve, which is one of the laminated control valves that throttles one of the output passages, is placed between the laminated pressure reducing valve and the laminated switching valve, and the laminated pressure reducing valve functions. Block the passage. When the laminated switching valve communicates one of the two output passages with the supply passage and the other with the return passage by the operation of the first pilot solenoid valve, the on-off valve is operated to open the pilot pressure. Pilot the fluid that acts on the valve element, the pilot pressure acting on the main valve element is set by the pilot valve that is switched to communicate by the operation of the second pilot solenoid valve, and that flows through the passage communicating with the supply passage on the downstream side of the main valve element. Reduce pressure to control. Also,
When the laminated type switching valve switches and communicates the other of the two output passages to the supply passage and one to the discharge passage by the operation of the first pilot solenoid valve, the on-off valve is closed and the pilot pressure is applied to the main valve body. The main valve does not control the decompression. Then, when always trying to obtain the pressure reduction control, the blocking of the working passage is released. As a result, the pilot pressure is applied to the main valve body through the working passage regardless of the opening / closing operation of the opening / closing valve, and the pressure reduction control is performed regardless of which of the two output passages is connected to the supply passage. Therefore, it is possible to obtain both the function of controlling the speed of the actuator and the function of controlling the pressure reduction only when the supply passage and one of the output passages are switched to each other by making the laminated position of the laminated pressure reducing valve invariable. You can
【０００７】[0007]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１において、１はマニホールドで、同一側面
としての上面に２個の取付面１Ａ、１Ｂを長手方向へ隔
てて形成し、各取付面１Ａ、１Ｂには圧力源Ｐに接続す
る供給通路２Ａ、２Ｂと、低圧側としてのタンクＴに接
続する戻り通路３Ａ、３Ｂ、４Ａ、４Ｂと、アクチュエ
ータ５に接続する２個の出力通路６Ａ、６Ｂ、７Ａ、７
Ｂ（尚、出力通路７Ａ、７Ｂは使用していないためアク
チュエータに接続していない。）と、パイロット流体を
流すパイロット通路８Ａ、８Ｂ、９Ａとを開口して設け
ている。１０は後述詳記する積層形減圧弁で、マニホー
ルド１の２個の取付面１Ａ、１Ｂ上に跨がって積層配設
し、一方の取付面１Ａに開口した各通路２Ａ、３Ａ、４
Ａ、６Ａ、６Ｂ、８Ａ、８Ｂと連通するよう通路１１、
１２、１３、１４、１５、１６、１７を貫設している。
１８は積層形制御弁の一つである積層形パイロット操作
逆止め弁で、積層形減圧弁１０上に一方の取付面１Ａに
対応して積層配設し、積層形減圧弁１０の各通路１１、
１２、１３、１４、１５、１６、１７と連通するよう通
路１９、２０、２１、２２、２３、２４、２５を貫設
し、アクチュエータ５の停止状態でアクチュエータ５側
よりタンクＴ側へ流体が漏れるのを防止するよう設けて
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a manifold, which is formed with two mounting surfaces 1A and 1B spaced apart in the longitudinal direction on the same upper surface, and each mounting surface 1A and 1B has a supply passage 2A connected to a pressure source P. 2B, return passages 3A, 3B, 4A, 4B connected to the tank T on the low pressure side, and two output passages 6A, 6B, 7A, 7 connected to the actuator 5.
B (note that the output passages 7A and 7B are not connected to the actuator because they are not used) and the pilot passages 8A, 8B and 9A through which the pilot fluid flows are opened. Reference numeral 10 denotes a laminated pressure reducing valve, which will be described later in detail. The passages 2A, 3A, 4 are formed in a laminated manner over the two mounting surfaces 1A, 1B of the manifold 1 and are open in one mounting surface 1A.
A, 6A, 6B, 8A, 8B to communicate with A,
12, 13, 14, 15, 16, 17 are provided through.
Reference numeral 18 denotes a laminated pilot-operated check valve which is one of the laminated control valves. The laminated pilot operated check valve 18 is laminated on the laminated pressure reducing valve 10 so as to correspond to one mounting surface 1A. ,
The passages 19, 20, 21, 22, 23, 24, and 25 are provided so as to communicate with 12, 13, 14, 15, 16, and 17, and the fluid flows from the actuator 5 side to the tank T side when the actuator 5 is stopped. It is provided to prevent leakage.
【０００８】２６は積層形パイロット操作逆止め弁１８
上に積層配設した積層形制御弁の一つである積層形絞り
弁で、積層形パイロット操作逆止め弁１８の各通路１
９、２０、２１、２２、２３、２４、２５と連通するよ
う通路２７、２８、２９、３０、３１、３２、３３を貫
設し、出力通路６Ａ、６Ｂに連通する通路３０、３１を
メータアウトで絞り制御してアクチュエータ５の速度制
御を行うよう設けている。３４Ａは５ポート３位置のパ
イロット操作の積層形切換弁で、積層形絞り弁２６上の
最上段に積層配設し、積層形絞り弁２６の各通路２７、
２８、２９、３０、３１、３２、３３と連通するよう通
路３４、３５、３６、３７、３８、３９、４０を設け、
供給通路２Ａに連通する通路３４を遮断し出力通路６Ａ
に連通する通路３７と戻り通路４Ａに連通する通路３６
間および出力通路６Ｂに連通する通路３８と戻り通路３
Ａに連通する通路３５間を連通する中立位置Ｘと、通路
３７を通路３４に通路３８を通路３５に切換連通する第
１切換位置Ｙと、通路３８を通路３４に通路３７を通路
３６に切換連通する第２切換位置Ｚとを有し、パイロッ
ト通路８Ａ、８Ｂを流れるパイロット流体の給排により
各位置Ｘ、Ｙ、Ｚ間を切換自在に設けている。４１Ａ、
４１Ｂはマニホールド１に配設した２位置３ポートの第
１パイロット電磁弁で、積層形切換弁３４Ａを作動操作
するよう通電作動によりパイロット通路８Ａ、８Ｂにパ
イロット流体を供給したり非通電作動によりパイロット
通路８Ａ、８Ｂのパイロット流体を排出したりして設け
ている。４２はマニホールド１に配設した２位置３ポー
トの第２パイロット電磁弁で、通電作動により他方の取
付面１Ｂに開口したパイロット通路９Ａにパイロット流
体を供給したり非通電作動によりパイロット通路９Ａの
パイロット流体を排出したりして設けている。Numeral 26 is a laminated pilot operated check valve 18
Each of the passages 1 of the laminated pilot operated check valve 18 is a laminated throttle valve which is one of laminated control valves arranged in a laminated manner above.
9, 20, 21, 22, 23, 24, 25 are communicated with the passages 27, 28, 29, 30, 31, 32, 33 so as to communicate with the output passages 6A, 6B. It is provided so as to control the speed of the actuator 5 by controlling the aperture at the out. 34A is a pilot operated laminated type switching valve with 5 ports and 3 positions, which is arranged in a laminated manner at the uppermost stage on the laminated type throttle valve 26, and each passage 27 of the laminated type throttle valve 26,
28, 29, 30, 31, 32, 33 are provided with passages 34, 35, 36, 37, 38, 39, 40 to communicate with
The output passage 6A is closed by blocking the passage 34 communicating with the supply passage 2A.
37 communicating with the return passage 4A and a passage 36 communicating with the return passage 4A
Between the passage 38 and the return passage 3 communicating with the output passage 6B
A neutral position X for communicating between the passages 35 communicating with A, a first switching position Y for communicating the passage 37 with the passage 34 and the passage 38 with the passage 35, and a passage 38 with the passage 34 and the passage 37 with the passage 36. The second switching position Z communicates with each other, and the positions X, Y, and Z are switchably provided by supplying and discharging the pilot fluid flowing through the pilot passages 8A and 8B. 41A,
Reference numeral 41B is a two-position three-port first pilot solenoid valve disposed in the manifold 1. It supplies pilot fluid to the pilot passages 8A and 8B by energizing to operate the laminated switching valve 34A and pilots by de-energizing. It is provided by discharging the pilot fluid from the passages 8A and 8B. Reference numeral 42 denotes a 2-position 3-port second pilot solenoid valve disposed in the manifold 1 for supplying pilot fluid to the pilot passage 9A opened to the other mounting surface 1B by energization or piloting the pilot passage 9A by de-energization. It is provided by discharging the fluid.
【０００９】図２ないし図５に詳細に示す如き、４３は
積層形減圧弁１０の第１の弁本体で、内部に主弁体４４
を摺動自在に嵌挿する摺動孔４５を設けている。摺動孔
４５には供給通路２Ａ、戻り通路３Ａ、４Ａに連通する
各通路１１、１２、１３を軸方向に間隔を有して交差し
て設けている。主弁体４４には供給通路２Ａに連通する
通路１１の主弁体４４の下流側の圧力をパイロット圧と
して図２の右方向へ付勢するよう作用して設けると共
に、このパイロット圧を主弁体４４に有した絞り４６を
介してパイロット室４７に導入して図２の左方向へ付勢
するよう対向して作用して設け、通路１１の主弁体４４
の下流側を流れる流体をパイロット圧に減圧制御して設
けている。４８はパイロット室４７に収装したばねで、
主弁体４４を図２の左方向へ付勢して設けている。４９
は第１の弁本体４３に配設したパイロット弁で、５０は
第１の弁本体４３上に積層配設した第２の弁本体５１に
配設したパイロット弁で、各パイロット弁４９、５０は
調整部材５２、５３により調整自在としたばね５４、５
５力によりパイロット室４７に導入して主弁体４４に作
用するパイロット圧をそれぞれ設定可能に設けている。
５６は弁本体５１に配設した切換弁で、弁本体５１の内
部へ切換弁体５７を摺動自在に嵌挿し、切換弁体５７の
左端に通路５８、５９を介してパイロット通路９Ａを連
通して設けている。そして、切換弁５６は第２パイロッ
ト電磁弁４２の非通電作動でパイロット通路９Ａのパイ
ロット流体を排出し切換弁体５７をばね６０力により左
端に位置した図３の状態で主弁体４４のパイロット室４
７を通路６１より通路６２、６３を介してパイロット弁
４９に連通すると共に、第２パイロット電磁弁４２の通
電作動でパイロット通路９Ａにパイロット流体を供給し
切換弁体５７をばね６０力に抗して図３の右方向へ摺動
し主弁体４４のパイロット室４７を通路６１より切換弁
体５７に有した通路６４を介してパイロット弁５０に切
換連通するよう設けている。As shown in detail in FIGS. 2 to 5, reference numeral 43 denotes a first valve body of the laminated pressure reducing valve 10, which has a main valve body 44 inside.
Is provided with a sliding hole 45 into which is slidably inserted. In the sliding hole 45, passages 11, 12 and 13 communicating with the supply passage 2A and the return passages 3A and 4A are provided so as to intersect each other with a gap in the axial direction. The main valve body 44 is provided with the pressure on the downstream side of the main valve body 44 of the passage 11 communicating with the supply passage 2A as a pilot pressure so as to be urged to the right in FIG. The main valve element 44 of the passage 11 is provided so as to be introduced into the pilot chamber 47 through the throttle 46 provided in the body 44 and act so as to oppose each other so as to urge it to the left in FIG.
The fluid flowing on the downstream side of is controlled to a pilot pressure under reduced pressure. 48 is a spring accommodated in the pilot chamber 47,
The main valve element 44 is provided so as to be biased to the left in FIG. 49
Is a pilot valve arranged in the first valve body 43, 50 is a pilot valve arranged in the second valve body 51 laminated on the first valve body 43, and each pilot valve 49, 50 is Adjustable springs 54, 5 by adjusting members 52, 53
The pilot pressures that are introduced into the pilot chamber 47 by the five forces and act on the main valve element 44 are settable.
A switching valve 56 is provided in the valve body 51. A switching valve body 57 is slidably inserted into the valve body 51, and a pilot passage 9A is connected to the left end of the switching valve body 57 via passages 58 and 59. Is provided. The switching valve 56 discharges the pilot fluid in the pilot passage 9A by the non-energizing operation of the second pilot solenoid valve 42, and the switching valve body 57 is positioned at the left end by the spring 60 force. Room 4
7 from the passage 61 to the pilot valve 49 via the passages 62 and 63, and the second pilot solenoid valve 42 is energized to supply the pilot fluid to the pilot passage 9A so that the switching valve element 57 resists the spring 60 force. 3, the pilot chamber 47 of the main valve body 44 is provided so as to be switched from the passage 61 to the pilot valve 50 via the passage 64 provided in the switching valve body 57.
【００１０】６５はパイロット操作の開閉弁で、その開
閉弁本体６６を弁本体５１の左側面にねじ部材６７によ
り着脱自在に取付けて配設し、開閉弁本体６６の内部に
開閉弁体６８を摺動自在に嵌挿する嵌挿孔６９を設け、
嵌挿孔６９には軸方向へ間隔を有して通路７０、７１、
７２、７３を開口して設けると共に、通路７１、７３と
軸方向へ間隔を有さず径方向に間隔を有して通路７４、
７５を開口して設け、通路７１と７４及び通路７３と７
５をそれぞれ開閉弁体６８の摺動にかかわりなく嵌挿孔
６９を介して常に連通するよう設けている。そして、各
通路７０、７１、７２、７３、７４、７５は弁本体５１
の左側面に当接する開閉弁本体６６の右側面に開口して
設けている。弁本体５１の左側面には主弁体４４の左端
側に通路７６を介して連通する通路７７と、通路７７と
並列的に通路７６へ連通する通路７８と、供給通路２Ａ
に連通する通路１１より分岐した通路７９と、低圧通路
３Ａに連通する通路１２より分岐した通路８０と、パイ
ロット通路８Ａに連通した通路１６より分岐した通路８
１と、パイロット通路８Ｂに連通した通路１７より分岐
した通路８２とを開口して設け、通路７７は通路７１と
連通し、通路７８は通路７０と連通し、通路７９は通路
７４と連通し、通路８０は通路７２と連通し、通路８１
は通路７３と連通し、通路８２は通路７５と連通してい
る。通路７７、８１、８２はそれぞれ開口端側にねじ部
を有し、通路８１、８２のねじ部には詰栓部材８３、８
４を取付け取外し自在に螺着して通路８１、８２を閉塞
して設け、通路７７のねじ部には開閉弁本体６６を取外
して詰栓部材８３もしくは８４を取付け取外し自在に螺
着して通路７７を閉塞自在に設けている。そして、開閉
弁６５と並列的に主弁体４４にパイロット圧を作用させ
る作用通路を通路７９、７４、嵌挿孔６９、通路７１、
７７より構成している。Reference numeral 65 denotes a pilot-operated on-off valve. An on-off valve body 66 is detachably attached to the left side surface of the valve body 51 by a screw member 67, and an on-off valve body 68 is provided inside the on-off valve body 66. A fitting insertion hole 69 for slidably fitting is provided,
The fitting insertion hole 69 has a space in the axial direction with passages 70, 71,
72 and 73 are provided so as to be opened, and the passages 71 and 73 are not axially spaced from each other but are radially spaced from each other, and the passages 74 and
75 is opened to provide passages 71 and 74 and passages 73 and 7.
5 are provided so as to always communicate with each other through the fitting insertion holes 69 regardless of the sliding movement of the on-off valve body 68. The passages 70, 71, 72, 73, 74, and 75 are the valve main body 51.
Is provided on the right side surface of the on-off valve body 66 that abuts on the left side surface thereof. On the left side surface of the valve body 51, a passage 77 communicating with the left end side of the main valve body 44 via a passage 76, a passage 78 communicating with the passage 76 in parallel with the passage 77, and a supply passage 2A.
To the low pressure passage 3A, a passage 80 from the passage 12 to the low pressure passage 3A, and a passage 8 to a pilot passage 8A.
1 and a passage 82 branched from the passage 17 which communicates with the pilot passage 8B are provided so that the passage 77 communicates with the passage 71, the passage 78 communicates with the passage 70, and the passage 79 communicates with the passage 74. The passage 80 communicates with the passage 72, and the passage 81
Communicate with the passage 73, and the passage 82 communicates with the passage 75. The passages 77, 81, 82 each have a threaded portion on the open end side, and the threaded portions of the passages 81, 82 have plugging members 83, 8 respectively.
4, the passages 81 and 82 are closed by attaching and detachably screwing, and the opening / closing valve main body 66 is removed from the thread portion of the passage 77, and the plug member 83 or 84 is attached and detachably screwed to the passage. 77 is provided so that it can be closed. The working passages for applying the pilot pressure to the main valve body 44 in parallel with the opening / closing valve 65 are passages 79 and 74, the fitting insertion hole 69, the passage 71,
It consists of 77.
【００１１】開閉弁６５は開閉弁体６８の端部にばね８
５を収装する収装室８６を形成し、収装室８６は開閉弁
体６８に設けた通路８７を介して通路７２に連通し、開
閉弁体６８は通路８１もしくは８２からの詰栓部材８３
もしくは８４の取外しで第１パイロット電磁弁４１Ａも
しくは４１Ｂの通電作動によりパイロット流体が通路７
３もしくは７５を流れて端部に作用しばね８５力に抗し
て摺動して開操作され通路７４と通路７０間を連通して
パイロット圧を主弁体４４に作用させると共に、第１パ
イロット電磁弁４１Ａもしくは４１Ｂの非通電作動によ
りパイロット流体が通路７３もしくは７５を流れて排出
しばね８５力により摺動して閉操作され通路７４と通路
７０間を遮断してパイロット圧を主弁体４４に作用させ
ないよう設けている。尚、通路７７を閉塞していない図
示状態においては、開閉弁６５の開閉操作にかかわりな
く通路７７を介してパイロット圧が主弁体４４に作用す
るため、詰栓部材８３、８４は取外しても良い。The opening / closing valve 65 has a spring 8 at the end of the opening / closing valve body 68.
5, a storage chamber 86 for storing 5 is formed, the storage chamber 86 communicates with the passage 72 through a passage 87 provided in the opening / closing valve body 68, and the opening / closing valve body 68 is a plugging member from the passage 81 or 82. 83
Alternatively, when 84 is removed, the pilot fluid is moved to the passage 7 by energizing the first pilot solenoid valve 41A or 41B.
3 or 75 to act on the end portion and slide against the force of the spring 85 to open so that the passage 74 communicates with the passage 70 so that the pilot pressure acts on the main valve element 44 and the first pilot When the solenoid valve 41A or 41B is de-energized, the pilot fluid flows through the passage 73 or 75 and is discharged. The pilot fluid is slid by the force of the spring 85 to be closed and the passage 74 and the passage 70 are shut off to close the pilot pressure to the main valve element 44. It is provided so as not to act on. In the illustrated state in which the passage 77 is not closed, the pilot pressure acts on the main valve body 44 through the passage 77 regardless of the opening / closing operation of the opening / closing valve 65, so that the plugging members 83 and 84 can be removed. good.
【００１２】次にかかる構成の作動を説明する。図示状
態は通路７７を閉塞しておらず、第１パイロット電磁弁
４１Ａの通電作動により積層形切換弁３４Ａを第１切換
位置Ｙに作動操作すると、供給通路２Ａの流体は通路１
１、１９、２７、３４より通路３７、３０、２２、１
４、出力通路６Ａを流れてアクチュエータ５に供給さ
れ、アクチュエータ５の流体は出力通路６Ｂ、通路１
５、２３、３１、３８より通路３５、２８、２０、１
２、戻り通路３Ａを流れてタンクＴに排出され、アクチ
ュエータ５は排出する流体が積層形絞り弁２６によりメ
ータアウトで絞り制御されて図１の右方向へ速度制御さ
れて作動する。このとき、供給通路２Ａより通路１１に
流れた流体はその一部がパイロット圧として通路７９、
７４、嵌挿孔６９、通路７１、７７、７６を介して主弁
体４４を右方向に付勢するよう作用すると共に、さらに
絞り４６を介してパイロット室４７に導入して主弁体４
４を左方向に付勢するよう作用し、パイロット室４７の
パイロット圧は通路６１、６２、６３を介してパイロッ
ト弁４９に作用し、主弁体４４は対向作用するパイロッ
ト圧に基づく作用力とばね４８力との平衡位置へ軸方向
摺動して通路１１を流れる流体をパイロット弁４９によ
り設定したパイロット圧に減圧制御する。Next, the operation of such a configuration will be described. In the illustrated state, the passage 77 is not closed, and when the laminated type switching valve 34A is operated to the first switching position Y by the energization of the first pilot solenoid valve 41A, the fluid in the supply passage 2A flows into the passage 1
Passages 37, 30, 22, 1 from 1, 19, 27, 34
4, the fluid is supplied to the actuator 5 by flowing through the output passage 6A, and the fluid of the actuator 5 is output passage 6B, the passage 1
From 5, 23, 31, 38 passages 35, 28, 20, 1
2. The flow through the return passage 3A is discharged to the tank T, and the actuator 5 operates by controlling the discharged fluid by metering out by the laminated throttle valve 26 by meter-out and controlling the speed to the right in FIG. At this time, a part of the fluid flowing from the supply passage 2A to the passage 11 serves as pilot pressure in the passage 79,
74, the insertion hole 69, and the passages 71, 77, and 76 to urge the main valve element 44 in the right direction, and further introduces it into the pilot chamber 47 through the throttle 46 to introduce the main valve element 4 into the pilot chamber 47.
4 to the left, the pilot pressure in the pilot chamber 47 acts on the pilot valve 49 via the passages 61, 62, 63, and the main valve element 44 acts on the pilot valve 49 in opposition. The fluid that slides in the axial direction to the equilibrium position with the force of the spring 48 and flows through the passage 11 is pressure-reduced to the pilot pressure set by the pilot valve 49.
【００１３】そして、アクチュエータ５が右方端まで作
動すると、第１パイロット電磁弁４１Ａを非通電作動し
て積層形切換弁３４Ａを中立位置Ｘに復帰作動操作し、
アクチュエータ５は停止する。この状態で、第１パイロ
ット電磁弁４１Ｂを通電作動して積層形切換弁３４Ａを
第２切換位置Ｚに作動操作すると、供給通路２Ａの流体
が出力通路６Ｂよりアクチュエータ５に供給され、アク
チュエータ５の流体は出力通路６Ａより戻り通路４Ａを
流れてタンクＴに排出され、アクチュエータ５は図１の
左方向へ速度制御されて作動し、アクチュエータ５に供
給される流体は前述と同様に主弁体４４でパイロット弁
４９により設定したパイロット圧に減圧制御する。そし
て、アクチュエータ５が図１に示す左方端まで作動する
と、第１パイロット電磁弁４１Ｂを非通電作動して積層
形切換弁３４Ａを中立位置Ｘに復帰作動操作し、アクチ
ュエータ５は停止する。また、主弁体４４に作用するパ
イロット圧をパイロット弁５０で設定するには、第２パ
イロット電磁弁４２を通電作動してパイロット通路９Ａ
にパイロット流体を供給すると、そのパイロット流体が
通路５９、５８を介して切換弁体５７の左端に作用し、
切換弁体５７はばね６０力に抗して図３の右方向へ摺動
して通路６１を通路６４に切換連通し、パイロット室４
７のパイロット圧は通路６１、６４を介してパイロット
弁５０に作用し、主弁体４４は通路１１を流れる流体を
パイロット弁５０により設定したパイロット圧に減圧制
御する。When the actuator 5 is operated to the right end, the first pilot solenoid valve 41A is de-energized to return the laminated type switching valve 34A to the neutral position X,
The actuator 5 stops. In this state, when the first pilot solenoid valve 41B is energized to operate the laminated type switching valve 34A to the second switching position Z, the fluid in the supply passage 2A is supplied to the actuator 5 from the output passage 6B and the actuator 5 operates. The fluid flows from the output passage 6A through the return passage 4A and is discharged to the tank T, the actuator 5 is operated by speed control in the leftward direction of FIG. 1, and the fluid supplied to the actuator 5 is the same as the main valve element 44 as described above. The depressurization control is performed by the pilot valve 49 to the set pilot pressure. When the actuator 5 is operated to the left end shown in FIG. 1, the first pilot solenoid valve 41B is de-energized to operate the laminated type switching valve 34A to return to the neutral position X, and the actuator 5 is stopped. To set the pilot pressure acting on the main valve element 44 with the pilot valve 50, the second pilot solenoid valve 42 is energized to operate the pilot passage 9A.
When the pilot fluid is supplied to, the pilot fluid acts on the left end of the switching valve body 57 via the passages 59 and 58,
The switching valve body 57 slides in the right direction in FIG. 3 against the force of the spring 60 to switch the passage 61 to the passage 64 so as to communicate with the pilot chamber 4.
The pilot pressure of 7 acts on the pilot valve 50 via the passages 61 and 64, and the main valve body 44 reduces the pressure of the fluid flowing through the passage 11 to the pilot pressure set by the pilot valve 50.
【００１４】次に、積層形切換弁３４Ａの第１切換位置
Ｙでのみ減圧制御を得ようとする場合には、図示状態よ
りねじ部材６７を緩めて開閉弁本体６６を弁本体５１よ
り取外し、通路８１に螺着した詰栓部材８３を取外して
通路８１の閉塞を解除すると共に、この詰栓部材８３を
通路７７に螺着して通路７７を閉塞し、再びねじ部材６
７を締付けて開閉弁本体６６を弁本体５１に取付ける。
この状態で、第１パイロット電磁弁４１Ａを通電作動し
てパイロット通路８Ａにパイロット流体を供給して積層
形切換弁３４Ａを第１切換位置Ｙに作動操作すると、ア
クチュエータ５は図１の右方向へ速度制御されて作動す
る。このとき、パイロット通路８Ａより通路１６に流れ
たパイロット流体の一部が流路８１、７３を介して開閉
弁体６８の端部に作用し、開閉弁体６８はばね８５力に
抗して摺動して開操作され通路７４と通路７０間を連通
し、供給通路２Ａより通路１１に流れた流体はその一部
がパイロット圧として通路７９、７４より通路７０、７
８、７６を介して主弁体４４に作用し、主弁体４４は通
路１１を流れる流体をパイロット圧に減圧制御する。Next, when it is desired to obtain the pressure reducing control only at the first switching position Y of the laminated type switching valve 34A, the screw member 67 is loosened from the state shown in the figure, and the on-off valve main body 66 is removed from the valve main body 51. The plugging member 83 screwed into the passage 81 is removed to release the blockage of the passage 81, the plugging member 83 is screwed into the passage 77 to close the passage 77, and the screw member 6 is again inserted.
7 is tightened to attach the opening / closing valve body 66 to the valve body 51.
In this state, when the first pilot solenoid valve 41A is energized to supply the pilot fluid to the pilot passage 8A and the laminated switching valve 34A is operated to the first switching position Y, the actuator 5 moves to the right in FIG. Operates under speed control. At this time, a part of the pilot fluid flowing from the pilot passage 8A into the passage 16 acts on the end portion of the opening / closing valve body 68 via the passages 81 and 73, and the opening / closing valve body 68 slides against the force of the spring 85. The fluid that is moved and opened to communicate between the passage 74 and the passage 70, and part of the fluid flowing from the supply passage 2A to the passage 11 serves as pilot pressure from the passages 79 and 74.
It acts on the main valve element 44 via 8, 76, and the main valve element 44 controls the pressure of the fluid flowing through the passage 11 to a pilot pressure.
【００１５】そして、アクチュエータ５が右方端まで作
動すると、第１パイロット電磁弁４１Ａを非通電作動し
て積層形切換弁３４Ａを中立位置Ｘに復帰作動操作し、
アクチュエータ５は停止する。この状態で、第１パイロ
ット電磁弁４１Ｂを通電作動して積層形切換弁３４Ａを
第２切換位置Ｚに作動操作すると、アクチュエータ５は
図１の左方向へ速度制御されて作動する。このとき、流
路８２は詰栓部材８４により閉塞されているため、開閉
弁体６８は端部にパイロット流体が作用せずばね８５力
により閉位置にあって通路７４と通路７０間を遮断し、
主弁体４４はパイロット圧が作用せずばね４８力により
図２の位置にあって通路１１を流れる流体を減圧制御し
ない。そして、アクチュエータ５が図１に示す左方端ま
で作動すると、第１パイロット電磁弁４１Ｂを非通電作
動して積層形切換弁３４Ａを中立位置Ｘに復帰作動操作
し、アクチュエータ５は停止する。When the actuator 5 is operated to the right end, the first pilot solenoid valve 41A is de-energized to operate the laminated type switching valve 34A to return to the neutral position X,
The actuator 5 stops. In this state, when the first pilot solenoid valve 41B is energized to operate the laminated switching valve 34A to the second switching position Z, the actuator 5 is speed-controlled to the left in FIG. At this time, since the flow passage 82 is closed by the plug member 84, the opening / closing valve body 68 is in the closed position due to the force of the spring 85 without the pilot fluid acting on the end portion, and the passage 74 and the passage 70 are shut off from each other. ,
The main valve body 44 does not act on the pilot pressure and is in the position shown in FIG. When the actuator 5 is operated to the left end shown in FIG. 1, the first pilot solenoid valve 41B is de-energized to operate the laminated type switching valve 34A to return to the neutral position X, and the actuator 5 is stopped.
【００１６】また、積層形切換弁３４Ａの第２切換位置
Ｚでのみ減圧制御を得ようとする場合には、図示状態よ
り通路８２に螺着した詰栓部材８４を取外して通路８２
の閉塞を解除すると共に、この詰栓部材８４を通路７７
に螺着して通路７７を閉塞する。この状態で、第１パイ
ロット電磁弁４１Ａを通電作動して積層形切換弁３４Ａ
を第１切換位置Ｙに作動操作すると、アクチュエータ５
は図１の右方向へ速度制御されて作動し、供給通路２Ａ
より通路１１を流れる流体は主弁体４４にパイロット圧
が作用せずばね４８力により図２の位置にあって減圧制
御されない。そして、アクチュエータ５が右方端まで作
動すると、第１パイロット電磁弁４１Ａを非通電作動し
て積層形切換弁３４Ａを中立位置Ｘに復帰作動操作し、
アクチュエータ５は停止する。この状態で、第１パイロ
ット電磁弁４１Ｂを通電作動して積層形切換弁３４Ａを
第２切換位置Ｚに作動操作すると、アクチュエータ５は
図１の左方向へ速度制御されて作動し、このとき、パイ
ロット通路８Ｂより通路１７に流れたパイロット流体の
一部が通路８２、７５を介して開閉弁体６８の端部に作
用し、開閉弁体６８は開操作されて通路７４と通路７０
間を連通し、主弁体４４には通路７９、７４より通路７
０、７８、７６を介してパイロット圧が作用して通路１
１を流れる流体をパイロット圧に減圧制御する。そし
て、アクチュエータ５が図１に示す左方端まで作動する
と、第１パイロット電磁弁４１Ｂを非通電作動して積層
形切換弁３４Ａを中立位置Ｘに復帰作動操作し、アクチ
ュエータ５は停止する。When it is desired to obtain the pressure reduction control only at the second switching position Z of the laminated type switching valve 34A, the plug 82 which is screwed into the passage 82 is removed from the state shown in the drawing, and the passage 82 is removed.
And the plugging member 84 is inserted into the passage 77.
And the passage 77 is closed. In this state, the first pilot solenoid valve 41A is energized to operate the laminated switching valve 34A.
When the actuator is operated to the first switching position Y, the actuator 5
Operates in the right direction in FIG.
As a result, the fluid flowing through the passage 11 is not controlled by the pilot pressure on the main valve element 44 and is in the position shown in FIG. When the actuator 5 operates to the right end, the first pilot solenoid valve 41A is de-energized to operate the laminated type switching valve 34A to return to the neutral position X,
The actuator 5 stops. In this state, when the first pilot solenoid valve 41B is energized to operate the laminated type switching valve 34A to the second switching position Z, the actuator 5 operates under speed control in the left direction of FIG. A part of the pilot fluid flowing from the pilot passage 8B to the passage 17 acts on the end portion of the opening / closing valve body 68 via the passages 82 and 75, and the opening / closing valve body 68 is operated to open so that the passage 74 and the passage 70 are formed.
The main valve element 44 is communicated with each other through the passages 79 and 74.
Pilot pressure acts through 0, 78, 76 to pass 1
The fluid flowing through 1 is pressure-reduced to the pilot pressure. When the actuator 5 is operated to the left end shown in FIG. 1, the first pilot solenoid valve 41B is de-energized to operate the laminated type switching valve 34A to return to the neutral position X, and the actuator 5 is stopped.
【００１７】かかる作動で、通路８１もしくは８２に螺
着した詰栓部材８３もしくは８４を取外して通路７７に
螺着することで、積層形切換弁３４Ａの第１切換位置Ｙ
もしくは第２切換位置Ｚでのみ減圧制御を行うことがで
きるため、積層形減圧弁１０と積層形切換弁３４Ａとの
間に積層形絞り弁２６や積層形パイロット操作逆止め弁
１８を積層配設して積層形減圧弁１０の積層位置を不変
にできて、積層形絞り弁２６によるアクチュエータ５の
速度制御を行う機能と積層形減圧弁１０による供給通路
２Ａと一方の出力通路６Ａもしくは６Ｂが切換連通した
時のみに減圧制御を行う機能との両方を得ることができ
る。また、積層形減圧弁１０を積層配置した状態で通路
７７への詰栓部材８３もしくは８４の取付け取外しを行
うことができて通路７７を閉塞自在にできるから、供給
通路２Ａと一方の出力通路６Ａもしくは６Ｂが切換連通
した時のみに減圧制御を行う機能への変更作業を簡単に
行うことができる。With this operation, the plugging member 83 or 84 screwed into the passage 81 or 82 is removed and screwed into the passage 77, so that the first switching position Y of the laminated switching valve 34A.
Alternatively, since the pressure reducing control can be performed only at the second switching position Z, the laminated throttle valve 26 and the laminated pilot operated check valve 18 are laminated between the laminated pressure reducing valve 10 and the laminated switching valve 34A. The laminated position of the laminated pressure reducing valve 10 can be made invariable, and the function of controlling the speed of the actuator 5 by the laminated pressure reducing valve 26 and the supply passage 2A by the laminated pressure reducing valve 10 and one output passage 6A or 6B are switched. It is possible to obtain both the function of performing the pressure reduction control only when the communication is established. Further, since the plugging member 83 or 84 can be attached / detached to / from the passage 77 in a state where the laminated type pressure reducing valves 10 are arranged in a laminated manner, the passage 77 can be closed freely, so that the supply passage 2A and one output passage 6A. Alternatively, it is possible to easily perform the work of changing to the function of performing the pressure reduction control only when 6B is switched and communicated.
【００１８】図６は本発明の他実施例を示し、一実施例
と同一個所には同符号を付して説明を省略し、異る個所
についてのみ説明する。積層形減圧弁１０の作用通路を
構成する通路７７には詰栓部材８８を取付け取外し自在
に螺着して設け、通路７７と並列的に弁本体５１に設け
た開閉弁６５はその端部にパイロット通路８Ａに連通す
る通路１６より分岐した通路８９を接続している。作動
は、通路７７を詰栓部材８８により閉塞して積層形切換
弁３４Ａの第１切換位置Ｙでのみ減圧制御を行う図６の
状態で、第１パイロット電磁弁４１Ａを通電作動して積
層形切換弁３４Ａを第１切換位置Ｙに作動操作すると、
アクチュエータ５は一実施例と同様に右方向に速度制御
されて作動し、このとき、パイロット通路８Ａより通路
１６に流れたパイロット流体の一部が開閉弁６５に作用
し、開閉弁６５は開操作されて通路７８を介してパイロ
ット圧を主弁体４４に作用し、主弁体４４は供給通路２
Ａより通路１１を流れる流体をパイロット圧に減圧制御
する。そして、アクチュエータ５が右方端まで作動する
と、第１パイロット電磁弁４１Ａを非通電作動してアク
チュエータ５を停止する。この状態で、第１パイロット
電磁弁４１Ｂを通電作動して積層形切換弁３４Ａを第２
切換位置Ｚに作動操作すると、アクチュエータ５は一実
施例と同様に左方向に速度制御されて作動し、このと
き、開閉弁６５にはパイロット流体が作用せず閉位置に
あって主弁体４４にパイロット圧を作用させず、主弁体
４４は通路１１を流れる流体を減圧制御しない。そし
て、アクチュエータ５が図６に示す左方端まで作動する
と、第１パイロット電磁弁４１Ｂを非通電作動してアク
チュエータ５を停止する。FIG. 6 shows another embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Only different parts will be described. A plug member 88 is attached to the passage 77 constituting the working passage of the laminated pressure reducing valve 10 so as to be detachably screwed, and an opening / closing valve 65 provided in the valve body 51 in parallel with the passage 77 is provided at the end thereof. A passage 89 branched from the passage 16 communicating with the pilot passage 8A is connected. The operation is performed by closing the passage 77 with the plug member 88 and performing depressurization control only at the first switching position Y of the laminated-type switching valve 34A. In the state of FIG. 6, the first pilot solenoid valve 41A is energized to operate the laminated type. When the switching valve 34A is operated to the first switching position Y,
The actuator 5 is actuated by controlling the speed to the right in the same manner as in the first embodiment. At this time, a part of the pilot fluid flowing from the pilot passage 8A to the passage 16 acts on the opening / closing valve 65, and the opening / closing valve 65 is opened. The pilot pressure is applied to the main valve element 44 through the passage 78, and the main valve element 44 is supplied to the supply passage 2
The fluid flowing through the passage 11 from A is pressure-reduced to the pilot pressure. Then, when the actuator 5 operates to the right end, the first pilot solenoid valve 41A is de-energized to stop the actuator 5. In this state, the first pilot solenoid valve 41B is energized to operate the laminated switching valve 34A to the second
When the actuator 5 is operated to the switching position Z, the speed of the actuator 5 is controlled to the left in the same manner as in the first embodiment. At this time, the pilot fluid does not act on the opening / closing valve 65 and the main valve element 44 is in the closed position. The pilot pressure is not applied to the main valve body 44, and the main valve body 44 does not control the pressure reduction of the fluid flowing through the passage 11. When the actuator 5 operates to the left end shown in FIG. 6, the first pilot solenoid valve 41B is de-energized to stop the actuator 5.
【００１９】また、積層形切換弁３４Ａの第１切換位置
Ｙと第２切換位置Ｚとで減圧制御を得る場合には、通路
７７に螺着した詰栓部材８８を取外して通路７７の閉塞
を解除する。この状態では、開閉弁６５の開閉操作にか
かわりなく閉塞を解除した通路７７を介して主弁体４４
にパイロット圧が作用するため、主弁体４４は積層形切
換弁３４Ａの第１切換位置Ｙと第２切換位置Ｚとで通路
１１を流れる流体をパイロット圧に減圧制御する。かか
る作動で、通路７７に詰栓部材８８を螺着することで、
積層形切換弁３４Ａの第１切換位置Ｙでのみ減圧制御を
行うことができるため、一実施例と同様に積層形減圧弁
１０の積層位置を不変にできて、積層形絞り弁２６によ
るアクチュエータ５の速度制御を行う機能と積層形減圧
弁１０による供給通路２Ａと一方の出力通路６Ａが切換
連通した時のみに減圧制御を行う機能との両方を得るこ
とができる。また、一実施例と同様に積層形減圧弁１０
を積層配置した状態で通路７７への詰栓部材８８の取付
け取外しを行うことができて通路７７を閉塞自在にでき
るから、供給通路２Ａと一方の出力通路６Ａが切換連通
した時のみに減圧制御を行う機能への変更作業を簡単に
行うことができる。When pressure reduction control is to be performed at the first switching position Y and the second switching position Z of the laminated switching valve 34A, the plugging member 88 screwed into the passage 77 is removed to close the passage 77. To release. In this state, the main valve body 44 is opened through the passage 77 that has been released from the blockage regardless of the opening / closing operation of the opening / closing valve 65.
Since the pilot pressure acts on the main valve element 44, the main valve body 44 depressurizes the fluid flowing through the passage 11 to the pilot pressure at the first switching position Y and the second switching position Z of the laminated switching valve 34A. With this operation, by screwing the plug member 88 into the passage 77,
Since the pressure reducing control can be performed only at the first switching position Y of the laminated type switching valve 34A, the laminated position of the laminated type pressure reducing valve 10 can be made unchanged as in the embodiment, and the actuator 5 by the laminated type throttle valve 26 can be used. It is possible to obtain both the function of performing speed control and the function of performing pressure reduction control only when the supply passage 2A by the laminated pressure reducing valve 10 and one output passage 6A are switched and communicated with each other. In addition, as in the embodiment, the laminated pressure reducing valve 10 is used.
Since the plugging member 88 can be attached / removed to / from the passage 77 in a state where the supply passage 2A and one output passage 6A are switched and communicated with each other, the pressure reduction control can be performed. It is possible to easily perform the work of changing to the function for performing.
【００２０】[0020]
【発明の効果】このように本発明は、圧力源に接続する
供給通路と低圧側に接続する戻り通路とアクチュエータ
に接続する２個の出力通路とパイロット流体を流すパイ
ロット通路とを開口した取付面を長手方向へ隔てて同一
側面に複数個形成したマニホールドと、マニホールドの
２個の取付面上に跨って積層配設し跨った一方の取付面
に開口した各通路と連通するよう通路を貫設した積層形
減圧弁と、積層形減圧弁上に積層形減圧弁に貫設した各
通路と連通するよう通路を貫設した積層形制御弁を介在
可能にして最上段に積層配設し、パイロット通路を流れ
るパイロット流体の給排により一方の取付面に開口した
２個の出力通路を供給通路と戻り通路とに切換連通する
パイロット操作の積層形切換弁と、マニホールドに配設
して積層形切換弁を作動操作するよう積層形減圧弁が跨
った一方の取付面に開口したパイロット通路にパイロッ
ト流体を供給したりこのパイロット通路のパイロット流
体を排出したりする第１パイロット電磁弁と、マニホー
ルドに配設して積層形減圧弁が跨った他方の取付面に開
口したパイロット通路にパイロット流体を供給したりこ
のパイロット通路のパイロット流体を排出したりする第
２パイロット電磁弁とを具備し、積層形減圧弁は弁本体
の内部へ摺動自在に嵌挿した主弁体に主弁体の下流側の
供給通路に連通する通路の圧力をパイロット圧として作
用して設けると共に、このパイロット圧を絞りを介し主
弁体に対向して作用して設けて主弁体の下流側の供給通
路に連通する通路を流れる流体をパイロット圧に応じて
減圧制御して設け、絞りを介して主弁体に作用するパイ
ロット圧をそれぞれ設定可能な複数のパイロット弁を弁
本体に配設し、マニホールドに配設の第２パイロット電
磁弁の作動によりパイロット流体が給排されるパイロッ
ト通路に連通してこのパイロット流体の給排により複数
のパイロット弁のいずれかを主弁体に切換連通するパイ
ロット操作の切換弁を弁本体に配設し、マニホールドに
配設の第１パイロット電磁弁の作動により開閉操作され
てその開操作により主弁体にパイロット圧を作用させる
と共にその閉操作により主弁体にパイロット圧を作用さ
せないようパイロット操作の開閉弁を弁本体に配設し、
開閉弁と並列的に主弁体にパイロット圧を作用させる作
用通路を設け、作用通路を閉塞自在に設けているため、
積層形減圧弁と積層形切換弁との間に積層形制御弁を介
在して積層可能にして積層形減圧弁の積層位置を不変に
できて、アクチュエータの速度制御を行う機能と供給通
路と一方の出力通路が切換連通した時のみに減圧制御を
行う機能との両方を得ることが可能にできる。また、積
層形減圧弁を積層配置した状態で主弁体にパイロット圧
を作用させる作用通路を閉塞自在にできるから、供給通
路と一方の出力通路が切換連通した時のみに減圧制御を
行う機能への変更作業を簡単に行うことができる効果を
有する。As described above, according to the present invention, the mounting surface having the supply passage connected to the pressure source, the return passage connected to the low pressure side, the two output passages connected to the actuator, and the pilot passage through which the pilot fluid flows is opened. A plurality of manifolds that are formed on the same side face and are separated from each other in the longitudinal direction, and a passage is provided so as to communicate with each of the passages that are stacked in two manifold mounting surfaces and open in one of the two mounting surfaces. The laminated type pressure reducing valve and the laminated type control valve having a passage penetrating the laminated type pressure reducing valve to communicate with the respective passages penetrating the laminated type pressure reducing valve are placed in the uppermost stage so that the pilot can be arranged. A pilot-operated laminated type switching valve for switching and connecting two output passages opened on one mounting surface to a supply passage and a return passage by supplying and discharging a pilot fluid flowing through the passage, and a laminated type switching valve arranged in a manifold. valve The first pilot solenoid valve that supplies pilot fluid to the pilot passage that opens on one mounting surface that the laminated pressure reducing valve straddles so as to operate and discharge the pilot fluid from this pilot passage, and install it on the manifold. And a second pilot solenoid valve for supplying pilot fluid to the pilot passage opened to the other mounting surface across which the laminated pressure reducing valve straddles and discharging the pilot fluid in this pilot passage. The main valve element slidably inserted into the valve body is provided with the pressure of the passage communicating with the supply passage on the downstream side of the main valve element acting as pilot pressure, and this pilot pressure is applied through the throttle to the main valve. The fluid flowing through the passage communicating with the body and communicating with the supply passage on the downstream side of the main valve body is provided with pressure reduction control according to the pilot pressure A plurality of pilot valves capable of setting pilot pressures acting on the body are arranged in the valve body, and communicated with a pilot passage through which pilot fluid is supplied and discharged by the operation of a second pilot solenoid valve arranged in the manifold. A pilot operated switching valve that switches and communicates any of a plurality of pilot valves with the main valve body by supplying and discharging pilot fluid is installed in the valve body, and is operated to open and close by the operation of the first pilot solenoid valve installed in the manifold. A pilot-operated on-off valve is provided in the valve body so that the pilot operation acts on the main valve body by the opening operation and the pilot pressure does not act on the main valve element by the closing operation.
Since the working passage for applying the pilot pressure to the main valve body is provided in parallel with the on-off valve, and the working passage is provided so as to be freely closed,
A laminated control valve is interposed between the laminated pressure reducing valve and the laminated switching valve to enable stacking so that the laminated position of the laminated pressure reducing valve can be made unchanged, and the function of controlling the speed of the actuator and the supply passage It is possible to obtain both the function of performing the pressure reduction control only when the output passages of the above are switched and connected. Further, since the working passage for exerting pilot pressure on the main valve body can be freely closed in the state where the laminated pressure reducing valves are arranged in a laminated manner, the pressure reducing control can be performed only when the supply passage and one output passage are switched and communicated. It has an effect that the change work of can be easily performed.
【図１】本発明の一実施例を示す弁装置の回路図であ
る。FIG. 1 is a circuit diagram of a valve device showing an embodiment of the present invention.
【図２】一実施例の要部を示す断面図である。FIG. 2 is a cross-sectional view showing a main part of one embodiment.
【図３】図２とは異る一実施例の要部を示す断面図であ
る。FIG. 3 is a cross-sectional view showing a main part of an embodiment different from FIG.
【図４】図２の線Ａ−Ａに沿った断面図である。FIG. 4 is a cross-sectional view taken along the line AA of FIG.
【図５】図４の線Ｂ−Ｂに沿った断面図である。5 is a cross-sectional view taken along the line BB of FIG.
【図６】本発明の他実施例を示す弁装置の回路図であ
る。FIG. 6 is a circuit diagram of a valve device according to another embodiment of the present invention.
１マニホールド １Ａ、１Ｂ取付面 ２Ａ、２Ｂ供給通路 ３Ａ、３Ｂ、４Ａ、４Ｂ戻り通路 ５アクチュエータ ６Ａ、６Ｂ、７Ａ、７Ｂ出力通路 ８Ａ、８Ｂ、９Ａパイロット通路 １０積層形減圧弁 ３４Ａ積層形切換弁 ４１Ａ、４１Ｂ第１パイロット電磁弁 ４２第２パイロット電磁弁 ４３、５１弁本体 ４４主弁体 ４６絞り ４９、５０パイロット弁 ５６切換弁 ６５開閉弁 1 Manifold 1A, 1B Mounting surface 2A, 2B Supply passage 3A, 3B, 4A, 4B Return passage 5 Actuator 6A, 6B, 7A, 7B Output passage 8A, 8B, 9A Pilot passage 10 Laminated pressure reducing valve 34A Laminated switching valve 41A , 41B 1st pilot solenoid valve 42 2nd pilot solenoid valve 43, 51 Valve body 44 Main valve body 46 Throttle 49, 50 Pilot valve 56 Switching valve 65 Open / close valve
Claims (1)
続する戻り通路とアクチュエータに接続する２個の出力
通路とパイロット流体を流すパイロット通路とを開口し
た取付面を長手方向へ隔てて同一側面に複数個形成した
マニホールドと、マニホールドの２個の取付面上に跨っ
て積層配設し跨った一方の取付面に開口した各通路と連
通するよう通路を貫設した積層形減圧弁と、積層形減圧
弁上に積層形減圧弁に貫設した各通路と連通するよう通
路を貫設した積層形制御弁を介在可能にして最上段に積
層配設し、パイロット通路を流れるパイロット流体の給
排により一方の取付面に開口した２個の出力通路を供給
通路と戻り通路とに切換連通するパイロット操作の積層
形切換弁と、マニホールドに配設して積層形切換弁を作
動操作するよう積層形減圧弁が跨った一方の取付面に開
口したパイロット通路にパイロット流体を供給したりこ
のパイロット通路のパイロット流体を排出したりする第
１パイロット電磁弁と、マニホールドに配設して積層形
減圧弁が跨った他方の取付面に開口したパイロット通路
にパイロット流体を供給したりこのパイロット通路のパ
イロット流体を排出したりする第２パイロット電磁弁と
を具備し、積層形減圧弁は弁本体の内部へ摺動自在に嵌
挿した主弁体に主弁体の下流側の供給通路に連通する通
路の圧力をパイロット圧として作用して設けると共に、
このパイロット圧を絞りを介し主弁体に対向して作用し
て設けて主弁体の下流側の供給通路に連通する通路を流
れる流体をパイロット圧に応じて減圧制御して設け、絞
りを介して主弁体に作用するパイロット圧をそれぞれ設
定可能な複数のパイロット弁を弁本体に配設し、マニホ
ールドに配設の第２パイロット電磁弁の作動によりパイ
ロット流体が給排されるパイロット通路に連通してこの
パイロット流体の給排により複数のパイロット弁のいず
れかを主弁体に切換連通するパイロット操作の切換弁を
弁本体に配設し、マニホールドに配設の第１パイロット
電磁弁の作動により開閉操作されてその開操作により主
弁体にパイロット圧を作用させると共にその閉操作によ
り主弁体にパイロット圧を作用させないようパイロット
操作の開閉弁を弁本体に配設し、開閉弁と並列的に主弁
体にパイロット圧を作用させる作用通路を設け、作用通
路を閉塞自在に設けたことを特徴とする弁装置。1. A mounting surface which opens a supply passage connected to a pressure source, a return passage connected to a low pressure side, two output passages connected to an actuator, and a pilot passage through which a pilot fluid flows is separated from each other in the longitudinal direction. A plurality of manifolds formed on the side surface, and a laminated pressure reducing valve in which a passage is provided so as to communicate with each passage opened in one of the two mounting surfaces of the manifold, and the stacked manifolds are disposed over the two mounting surfaces of the manifold. A pilot control valve is installed on top of the laminated pressure reducing valve so that a laminated control valve having a passage penetrating through the laminated pressure reducing valve can communicate with each other. A pilot-operated laminated type switching valve for switching and connecting two output passages opened on one mounting surface to a supply passage and a return passage by discharge, and a laminated type switching valve disposed on a manifold to operate the laminated type changeover valve. Type pilot pressure reducing valve that supplies pilot fluid to the pilot passage that opens on one mounting surface that the pressure reducing valve straddles and discharges pilot fluid in this pilot passage, and a laminated pressure reducing valve that is installed in the manifold And a second pilot solenoid valve for supplying pilot fluid to the pilot passage opened on the other mounting surface straddled by and for discharging the pilot fluid in this pilot passage. The main valve body slidably inserted is provided with the pressure of the passage communicating with the supply passage on the downstream side of the main valve body as a pilot pressure.
This pilot pressure is provided so as to be opposed to the main valve body through the throttle, and the fluid flowing through the passage communicating with the supply passage on the downstream side of the main valve is provided under the pressure reduction control according to the pilot pressure. A plurality of pilot valves capable of setting pilot pressures acting on the main valve body are installed in the valve body, and communicated with a pilot passage through which pilot fluid is supplied and discharged by the operation of the second pilot solenoid valve installed in the manifold. A pilot-operated switching valve that switches and communicates any of a plurality of pilot valves with the main valve body by supplying and discharging this pilot fluid is installed in the valve body, and the operation of the first pilot solenoid valve installed in the manifold A pilot operated on-off valve is opened and closed so that pilot pressure is applied to the main valve body by opening and closing, and pilot pressure is not applied to the main valve body by closing it. Disposed in the body, the opening and closing valve in parallel to the working channel for applying a pilot pressure provided the main valve body, the valve is characterized by providing freely closing the working channel device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28661392A JP3397346B2 (en) | 1992-09-30 | 1992-09-30 | Valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28661392A JP3397346B2 (en) | 1992-09-30 | 1992-09-30 | Valve device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06117414A true JPH06117414A (en) | 1994-04-26 |
| JP3397346B2 JP3397346B2 (en) | 2003-04-14 |
Family
ID=17706684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28661392A Expired - Fee Related JP3397346B2 (en) | 1992-09-30 | 1992-09-30 | Valve device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3397346B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003042102A (en) * | 2001-07-31 | 2003-02-13 | Nabco Ltd | Door closing device of vehicle and operation valve of the device |
| JP2007525630A (en) * | 2004-02-27 | 2007-09-06 | アルーマナ、マイクロウ、エルエルシー | Hybrid micro / macro plate valve |
| US8925793B2 (en) | 2012-01-05 | 2015-01-06 | Dunan Microstaq, Inc. | Method for making a solder joint |
| US8956884B2 (en) | 2010-01-28 | 2015-02-17 | Dunan Microstaq, Inc. | Process for reconditioning semiconductor surface to facilitate bonding |
| US8996141B1 (en) | 2010-08-26 | 2015-03-31 | Dunan Microstaq, Inc. | Adaptive predictive functional controller |
| US9006844B2 (en) | 2010-01-28 | 2015-04-14 | Dunan Microstaq, Inc. | Process and structure for high temperature selective fusion bonding |
| US9140613B2 (en) | 2012-03-16 | 2015-09-22 | Zhejiang Dunan Hetian Metal Co., Ltd. | Superheat sensor |
| US9188375B2 (en) | 2013-12-04 | 2015-11-17 | Zhejiang Dunan Hetian Metal Co., Ltd. | Control element and check valve assembly |
| US9702481B2 (en) | 2009-08-17 | 2017-07-11 | Dunan Microstaq, Inc. | Pilot-operated spool valve |
-
1992
- 1992-09-30 JP JP28661392A patent/JP3397346B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003042102A (en) * | 2001-07-31 | 2003-02-13 | Nabco Ltd | Door closing device of vehicle and operation valve of the device |
| JP2007525630A (en) * | 2004-02-27 | 2007-09-06 | アルーマナ、マイクロウ、エルエルシー | Hybrid micro / macro plate valve |
| US9702481B2 (en) | 2009-08-17 | 2017-07-11 | Dunan Microstaq, Inc. | Pilot-operated spool valve |
| US8956884B2 (en) | 2010-01-28 | 2015-02-17 | Dunan Microstaq, Inc. | Process for reconditioning semiconductor surface to facilitate bonding |
| US9006844B2 (en) | 2010-01-28 | 2015-04-14 | Dunan Microstaq, Inc. | Process and structure for high temperature selective fusion bonding |
| US8996141B1 (en) | 2010-08-26 | 2015-03-31 | Dunan Microstaq, Inc. | Adaptive predictive functional controller |
| US8925793B2 (en) | 2012-01-05 | 2015-01-06 | Dunan Microstaq, Inc. | Method for making a solder joint |
| US9140613B2 (en) | 2012-03-16 | 2015-09-22 | Zhejiang Dunan Hetian Metal Co., Ltd. | Superheat sensor |
| US9404815B2 (en) | 2012-03-16 | 2016-08-02 | Zhejiang Dunan Hetian Metal Co., Ltd. | Superheat sensor having external temperature sensor |
| US9772235B2 (en) | 2012-03-16 | 2017-09-26 | Zhejiang Dunan Hetian Metal Co., Ltd. | Method of sensing superheat |
| US9188375B2 (en) | 2013-12-04 | 2015-11-17 | Zhejiang Dunan Hetian Metal Co., Ltd. | Control element and check valve assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3397346B2 (en) | 2003-04-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100234605B1 (en) | Hydraulic control system having poppet and spool type valves | |
| WO2005084211B1 (en) | Hybrid micro/macro plate valve | |
| EP0915259B1 (en) | Directional control valve connector device | |
| EP0869418B1 (en) | Pressure regulating valve mounted in base-mounted transfer valve | |
| JPH06117414A (en) | Valve gear | |
| EP0822361B1 (en) | Pressure-control valve mounted on a base-mount selector valve | |
| JPH0495601A (en) | Pilot pressure control circuit of selector valve in actuator drive circuit | |
| JP2000516885A (en) | Electro-hydraulic control device | |
| EP0644336B1 (en) | Multiplexing valve | |
| JP2002181007A (en) | Fluid power interlocking system | |
| CA2095314A1 (en) | Hydraulic Servo Valve with Controlled Disengagement Feature | |
| JP3534324B2 (en) | Pressure compensating valve | |
| JP2002276607A (en) | Hydraulic control device | |
| JPH0643523Y2 (en) | Control valve for construction machinery | |
| JP2761886B2 (en) | Hydraulic control device | |
| KR101505016B1 (en) | Automatic pressure regulating control device for reciprocatable double acting booster | |
| JPH0454499Y2 (en) | ||
| JPH06117416A (en) | Valve device | |
| JPH0318722Y2 (en) | ||
| JP3667036B2 (en) | Hydraulic control circuit | |
| JP2577676Y2 (en) | Pressure oil supply device | |
| JPS6128882Y2 (en) | ||
| JPS58180877A (en) | Directional control valve gear | |
| JPS646455Y2 (en) | ||
| JP2002276609A (en) | Hydraulic control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080214 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090214 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090214 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100214 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110214 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110214 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120214 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |