JPH06193769A - Composite electromagnetic selector valve - Google Patents

Abstract

PURPOSE:To surely prevent the waste of the pressurized fluid in a feeding flow passage where two main valves cut off the feeding flow passage and shift to the first position for the communication between a load flow passage and a discharge flow passage and a portion of the pilot fluid is converted to the pilot fluid, eliminating the flow-out to the low pressure side, when two pilot solenoid valves are in a dismatched operation. CONSTITUTION:On the shoulder parts of the piston members 17A and 17B of the main valves 15A and 15B, two pilot chambers 20A and 20B are arranged in parallel in separation in the radial direction by two action surfaces 18A and 18B separated in the radial direction, and the pilot chambers 20A and 20B are connected with a pilot load flow passage 29A by a connection flow passage 33A. Further, the rest two pilot chambers are connected with the pilot load flow passage 29B by the connection flow passage 33B, and respective action surfaces 18A, 18B,... are formed to the dimension for shifting each main valve 15A, 15B to the first position, when the pilot fluid is introduced into respective pilot chambers 20A, 20B.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、並列配設した２個の主
弁を２個のパイロット電磁弁によりパイロット操作して
供給流路と負荷流路および排出流路間の切換制御を行う
複合電磁切換弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a composite system in which two main valves arranged in parallel are pilot-operated by two pilot solenoid valves to control switching between a supply flow path, a load flow path, and a discharge flow path. Regarding the electromagnetic switching valve.

【０００２】[0002]

【従来の技術】従来、この種の複合電磁切換弁として実
公昭６２−２９７３２号公報に示された図１０の如きも
のがある。このものは、圧力流体を供給する供給流路Ｐ
１と流体アクチュエータ３８へ接続する負荷流路Ａ１と
低圧側へ接続する排出流路Ｅ１とを有した弁本体内に、
２個のパイロット電磁弁３９Ａ、３９Ｂによりパイロッ
ト操作される２個の主弁４０Ａ、４０Ｂを並列配設し、
２個のパイロット電磁弁３９Ａ、３９Ｂの非通電時、各
主弁４０Ａ、４０Ｂをばね４１Ａ、４１Ｂ力および各主
弁４０Ａ、４０Ｂに作用する供給流路Ｐ１の圧力流体に
よる作用力で供給流路Ｐ１を遮断し負荷流路Ａ１と排出
流路Ｅ１を連通する第１位置に移動し、２個のパイロッ
ト電磁弁３９Ａ、３９Ｂの通電時、供給流路Ｐ１の圧力
流体の一部をパイロット流体として各主弁４０Ａ、４０
Ｂのパイロット室４２Ａ、４２Ｂに導入し、各主弁４０
Ａ、４０Ｂをパイロット室４２Ａ、４２Ｂに導入するパ
イロット流体による作用力でばね４１Ａ、４１Ｂ力およ
び各主弁４０Ａ、４０Ｂに作用する供給流路Ｐ１の圧力
流体による作用力に抗して供給流路Ｐ１と負荷流路Ａ１
を連通して排出流路Ｅ１を遮断する第２位置に移動して
設けている。2. Description of the Related Art Conventionally, there is a composite electromagnetic switching valve of this type as shown in FIG. 10 of Japanese Utility Model Publication No. 62-29732. This is a supply channel P for supplying a pressure fluid.
1 and a flow passage A1 connected to the fluid actuator 38 and a discharge flow passage E1 connected to the low pressure side,
Two main valves 40A, 40B pilot-operated by two pilot solenoid valves 39A, 39B are arranged in parallel,
When the two pilot solenoid valves 39A, 39B are not energized, the main flow valves 40A, 40B are supplied with the force exerted by the springs 41A, 41B and the supply flow channel P1 acting on the main valves 40A, 40B. When the pilot solenoid valves 39A and 39B are energized by moving P1 to the first position where the load passage A1 and the discharge passage E1 communicate with each other, a part of the pressure fluid in the supply passage P1 is used as a pilot fluid. Main valves 40A, 40
B pilot chambers 42A and 42B of each main valve 40
Supply flow passage against the action force of the springs 41A and 41B by the action of the pilot fluid that introduces A and 40B into the pilot chambers 42A and 42B and the action force of the pressure fluid of the supply flow passage P1 that acts on each of the main valves 40A and 40B. P1 and load flow path A1
Are provided so as to communicate with each other and move to a second position that blocks the discharge flow path E1.

【０００３】そして、いずれか一方のパイロット電磁弁
３９Ａもしくは３９Ｂの故障による２個のパイロット電
磁弁３９Ａ、３９Ｂの不整合作動時、パイロット流体が
導入される一方の主弁４０Ａもしくは４０Ｂのパイロッ
ト室４２Ａもしくは４２Ｂのパイロット流体を、連通路
４３を流して他方の主弁４０Ｂもしくは４０Ａのパイロ
ット室４２Ｂもしくは４２Ａのパイロット流体を低圧側
に導出するパイロット電磁弁３９Ｂもしくは３９Ａより
低圧側に導出し、２個の主弁４０Ａ、４０Ｂをともに供
給流路Ｐ１を遮断し負荷流路Ａ１と排出流路Ｅ１を連通
する第１位置に移動して、負荷流路Ａ１の圧力降下を短
時間で得られるよう設けている。Then, when the two pilot solenoid valves 39A and 39B are misaligned due to the failure of one of the pilot solenoid valves 39A and 39B, the pilot chamber 42A of the one main valve 40A or 40B into which the pilot fluid is introduced. Alternatively, the pilot fluid of 42B is led through the communication passage 43 to the low pressure side of the pilot solenoid valve 39B or 39A for leading the pilot fluid of the pilot chamber 42B or 42A of the other main valve 40B or 40A to the low pressure side. Both main valves 40A and 40B are moved to a first position where the supply flow path P1 is blocked and the load flow path A1 and the discharge flow path E1 are communicated with each other so that the pressure drop of the load flow path A1 can be obtained in a short time. ing.

【０００４】[0004]

【発明が解決しようとする課題】ところが、かかる構成
では、２個のパイロット電磁弁３９Ａ、３９Ｂの不整合
作動時、一方の主弁４０Ａもしくは４０Ｂのパイロット
室４２Ａもしくは４２Ｂに導入されるパイロット流体
を、他方の主弁４０Ｂもしくは４０Ａをパイロット操作
するパイロット電磁弁３９Ｂもしくは３９Ａより低圧側
に導出するため、一部をパイロット流体とする供給流路
Ｐ１の圧力流体が浪費されてしまう問題点があった。本
発明は、かかる問題点を解決するもので、２個のパイロ
ット電磁弁の不整合作動時、２個の主弁がともに供給流
路を遮断し負荷流路と排出流路を連通する第１位置に移
動すると共に、パイロット流体を低圧側に導出すること
なくして一部をパイロット流体とする供給流路の圧力流
体の浪費を確実に防止し得るようにした複合電磁切換弁
を提供するものである。However, in such a configuration, when the two pilot solenoid valves 39A and 39B are misaligned, the pilot fluid introduced into the pilot chamber 42A or 42B of one main valve 40A or 40B is However, since the other main valve 40B or 40A is led out to a lower pressure side than the pilot solenoid valve 39B or 39A for pilot operation, there is a problem that the pressure fluid in the supply passage P1 of which a part is pilot fluid is wasted. . The present invention solves such a problem, and when the two pilot solenoid valves are misaligned, the two main valves both block the supply flow passage and connect the load flow passage and the discharge flow passage. (EN) A composite solenoid operated directional control valve that moves to a position and can reliably prevent waste of pressure fluid in a supply channel, a part of which serves as pilot fluid, without draining pilot fluid to the low pressure side. is there.

【０００５】[0005]

【課題を解決するための手段】このため本発明は、圧力
流体を供給する供給流路とこの供給流路より順次軸方向
に離して流体アクチュエータへ接続する負荷流路と低圧
側へ接続する排出流路とを弁本体に有し、供給流路と負
荷流路とを第１接続孔で接続すると共に、負荷流路と排
出流路とを第２接続孔で接続して設け、弁本体の供給流
路内に移動自在に設けて第１接続孔を開閉する供給弁体
と弁本体の排出流路内に移動自在に設けて第２接続孔を
開閉する排出弁体とを連結してそれぞれ備えた２個の主
弁を弁本体内に並列配設し、各主弁は供給弁体で第１接
続孔を閉じて供給流路を遮断し排出弁体で第２接続孔を
開いて負荷流路と排出流路を連通する第１位置と、供給
弁体で第１接続孔を開いて供給流路と負荷流路を連通し
排出弁体で第２接続孔を閉じて排出流路を遮断する第２
位置とに移動自在に設け、各主弁の排出弁体にはそれぞ
れ径方向に離した２個の作用面を有するピストン部材を
備え、各主弁のピストン部材背部には各作用面により区
画形成したそれぞれ２個のパイロット室を径方向に離し
て並列配設し、供給流路の圧力流体の一部をパイロット
流体として主弁のパイロット室に導入したり供給流路か
らのパイロット流体を遮断してパイロット室内のパイロ
ット流体を低圧側に導出したりする２個のパイロット電
磁弁を設け、２個のパイロット電磁弁の一方を各主弁の
それぞれ１個のパイロット室に接続すると共に、他方を
各主弁のそれぞれ残りの１個のパイロット室に接続し、
パイロット室に導入したパイロット流体が作用する主弁
のピストン部材の各作用面は、２個のパイロット室への
パイロット流体の導入により各主弁を第２位置に移動す
ると共に、１個のパイロット室へのパイロット流体の導
入では各主弁を第１位置に移動する大きさに形成して成
る。Therefore, according to the present invention, a supply passage for supplying a pressure fluid, a load passage for axially separating from the supply passage for connection to a fluid actuator and a discharge passage for connection to a low pressure side are provided. The valve body has a flow passage, the supply flow passage and the load flow passage are connected by the first connection hole, and the load flow passage and the discharge flow passage are connected by the second connection hole. A supply valve body that is movably provided in the supply flow path to open and close the first connection hole and a discharge valve body that is movably provided in the discharge flow path of the valve body to open and close the second connection hole are connected to each other. The two main valves provided are arranged in parallel in the valve body, and each main valve closes the first connection hole with the supply valve body to block the supply flow path and opens the second connection hole with the discharge valve body to load the main valve. The first position where the flow passage and the discharge flow passage are communicated, and the first connection hole is opened in the supply valve body so that the supply flow passage and the load flow passage are communicated with each other, and the second connection is made in the discharge valve body. The blocking the discharge channel closes the hole 2
The main body of each main valve is provided with a piston member having two working surfaces which are separated from each other in the radial direction, and the main valve is provided with a partition formed by each working surface on the back of the piston member. The two pilot chambers are arranged in parallel in a radial direction so that a part of the pressure fluid in the supply passage is introduced as pilot fluid into the pilot chamber of the main valve or the pilot fluid from the supply passage is shut off. Two pilot solenoid valves for leading the pilot fluid in the pilot chamber to the low pressure side are provided, and one of the two pilot solenoid valves is connected to one pilot chamber of each main valve and the other is connected to the other. Connect to the remaining one pilot chamber of each main valve,
Each working surface of the piston member of the main valve on which the pilot fluid introduced into the pilot chamber acts moves each main valve to the second position by the introduction of the pilot fluid into the two pilot chambers, and also one pilot chamber When the pilot fluid is introduced into the main valve, each main valve is sized to move to the first position.

【０００６】[0006]

【作用】かかる本発明の構成において、２個のパイロッ
ト電磁弁の整合作動時、２個のパイロット電磁弁により
２個の主弁のそれぞれ全てのパイロット室内のパイロッ
ト流体を低圧側に導出すると、各主弁は第１位置に移動
して供給弁体が第１接続孔を閉じて供給流路を遮断し排
出弁体が第２接続孔を開いて負荷流路と排出流路を連通
する。また、２個のパイロット電磁弁により２個の主弁
のそれぞれ全てのパイロット室にパイロット流体を導入
すると、パイロット室に導入したパイロット流体がそれ
ぞれ全ての作用面に作用し、各主弁は第２位置に移動し
て供給弁体が第１接続孔を開いて供給流路と負荷流路を
連通し排出弁体が第２接続孔を閉じて排出流路を遮断す
る。そして、第１位置に移動している各主弁を第２位置
に移動させる場合のいずれか一方のパイロット電磁弁の
故障による２個のパイロット電磁弁の不整合作動時、一
方のパイロット電磁弁により２個の主弁のそれぞれ１個
のパイロット室にパイロット流体を導入すると共に、他
方のパイロット電磁弁が供給流路からのパイロット流体
を遮断して２個の主弁のそれぞれ残りの１個のパイロッ
ト室にはパイロット流体が導入されず、各主弁はともに
第１位置に移動したままであり、供給流路を遮断し負荷
流路と排出流路を連通する。また、第２位置に移動して
いる各主弁を第１位置に移動させる場合のいずれか一方
のパイロット電磁弁の故障による２個のパイロット電磁
弁の不整合作動時、前述の不整合作動時と同様に２個の
主弁のそれぞれ１個のパイロット室にパイロット流体を
導入し、各主弁はともに第１位置に移動して、供給流路
を遮断し負荷流路と排出流路を連通する。このため、２
個のパイロット電磁弁の不整合作動時、２個の主弁がと
もに供給流路を遮断し負荷流路と排出流路を連通する第
１位置に移動できると共に、パイロット流体を低圧側に
導出することなくできて一部をパイロット流体とする供
給流路の圧力流体の浪費を確実に防止することができ
る。In the structure of the present invention, when the two pilot solenoid valves are aligned, the pilot fluids in all the pilot chambers of the two main valves are discharged to the low pressure side by the two pilot solenoid valves. The main valve moves to the first position, the supply valve body closes the first connection hole to block the supply flow path, and the discharge valve body opens the second connection hole to connect the load flow path and the discharge flow path. Further, when the pilot fluid is introduced into all the pilot chambers of the two main valves by the two pilot solenoid valves, the pilot fluid introduced into the pilot chamber acts on all the working surfaces, and each of the main valves operates the second valve. When moved to the position, the supply valve body opens the first connection hole to communicate the supply flow path and the load flow path, and the discharge valve body closes the second connection hole to block the discharge flow path. Then, when the main solenoid valves that are moving to the first position are moved to the second position, when one of the pilot solenoid valves is misaligned due to the failure of one of the pilot solenoid valves, The pilot fluid is introduced into each one pilot chamber of the two main valves, and the other pilot solenoid valve shuts off the pilot fluid from the supply flow path, and the remaining one pilot of each of the two main valves. No pilot fluid is introduced into the chamber, and each main valve remains moving to the first position, blocking the supply passage and connecting the load passage and the discharge passage. Also, when the main valves that are moving to the second position are moved to the first position, when one of the pilot solenoid valves fails due to a malfunction of the two pilot solenoid valves, or when the above-mentioned mismatch operation occurs. Similarly, the pilot fluid is introduced into one pilot chamber of each of the two main valves, and each main valve moves to the first position to cut off the supply flow passage and connect the load flow passage and the discharge flow passage. To do. Therefore, 2
When the pilot solenoid valves are misaligned, the two main valves can both move to the first position where they block the supply passage and communicate the load passage and the discharge passage, and at the same time, the pilot fluid is led to the low pressure side. It is possible to reliably prevent the pressure fluid from being wasted in the supply passage, a part of which is used as the pilot fluid.

【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ないし図６において、１は樹脂性の弁本体
で、圧力流体を供給する供給流路Ｐとこの供給流路Ｐよ
り順次軸方向に離して流体アクチュエータへ接続する負
荷流路Ａと低圧側へ接続する排出流路Ｅとを有し、供給
流路Ｐと負荷流路Ａとを接続する第１接続孔２Ａ、２Ｂ
を２個平行に形成していると共に、負荷流路Ａと排出流
路Ｅとを接続する第２接続孔３Ａ、４Ａ、３Ｂ、４Ｂ
を、図５に詳細に示す如く、２個を径方向に離して並列
配設して１組とし、このものを２組平行に形成してい
る。図２に詳細に示す如く、４、５は図示しないボルト
部材で本体１の両側面に固着した金属性の蓋部材で、本
体１の各流路Ｐ、Ａ、Ｅを密閉形成している。そして、
蓋部材５には排出流路Ｅを開口して設け、この開口側端
部に消音器等を接続するためのねじ部を形成している。
６は弁本体１の供給流路Ｐの開口側端部に図示しないボ
ルト部材で固着した金属性の継手部材で、圧力流体の供
給源からの配管を着脱自在に接続するためのねじ部を内
周面に形成している。７は弁本体１の負荷流路Ａの開口
側端部に図示しないボルト部材で固着した金属性の継手
部材で、流体アクチュエータへの配管を着脱自在に接続
するためのねじ部を内周面に形成している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 6, reference numeral 1 denotes a resin valve main body, a supply passage P for supplying a pressure fluid, a load passage A which is sequentially separated from the supply passage P in the axial direction and connected to a fluid actuator, and a low pressure side. A first connection hole 2A, 2B for connecting the supply flow path P and the load flow path A.
And two second connection holes 3A, 4A, 3B, and 4B that connect the load flow path A and the discharge flow path E together.
As shown in detail in FIG. 5, two pieces are arranged in parallel in the radial direction to form one set, and two sets are formed in parallel. As shown in detail in FIG. 2, reference numerals 4 and 5 denote metallic lid members secured to both side surfaces of the main body 1 by bolt members (not shown), and each of the flow paths P, A, E of the main body 1 are hermetically formed. And
The lid member 5 is provided with an opening of the discharge flow path E, and a screw portion for connecting a silencer or the like is formed at an end portion on the opening side.
Reference numeral 6 denotes a metallic joint member fixed to the opening side end portion of the supply passage P of the valve body 1 with a bolt member (not shown), and has a threaded portion for detachably connecting a pipe from a pressure fluid supply source. It is formed on the peripheral surface. Reference numeral 7 is a metallic joint member fixed to the opening side end of the load passage A of the valve body 1 with a bolt member (not shown), and has a threaded portion on the inner peripheral surface for detachably connecting the pipe to the fluid actuator. Is forming.

【０００８】８Ａ、８Ｂは第１接続孔２Ａ、２Ｂを開閉
する２個の供給弁体で、供給流路Ｐの第１接続孔２Ａ、
２Ｂが開口する周囲に形成した弁座９Ａ、９Ｂに着離す
るよう供給流路Ｐ内に移動自在に設けている。１０Ａ、
１０Ｂは２個で１組の第２接続孔３Ａ、４Ａおよび３
Ｂ、４Ｂをそれぞれ１個で開閉する２個の排出弁体で、
図４に詳細に示す如く、楕円形状に設け、排出流路Ｅの
第２接続孔３Ａ、４Ａおよび３Ｂ、４Ｂが開口する周囲
に形成した弁座１１Ａ、１１Ｂに着離するよう排出流路
Ｅ内に移動自在に設けている。１２Ａはロッド部材で、
第１接続孔２Ａおよび第２接続孔３Ａと４Ａとの間に第
１接続孔２Ａと同芯に位置した挿通孔１３Ａを移動自在
に遊嵌して挿通し、その一端を弁本体１に有した支持部
材１４Ａで軸支している。また、ロッド部材１２Ｂはロ
ッド部材１２Ａと同様に第１接続孔２Ｂおよび挿通孔１
３Ｂを移動自在に遊嵌して挿通し、その一端を支持部材
１４Ｂで軸支している。Reference numerals 8A and 8B denote two supply valve bodies that open and close the first connection holes 2A and 2B, respectively.
It is movably provided in the supply passage P so as to be attached to and detached from the valve seats 9A and 9B formed around the opening of 2B. 10A,
10B includes two second connection holes 3A, 4A and 3
Two discharge valve bodies that open and close B and 4B respectively.
As shown in detail in FIG. 4, the discharge flow passage E is provided in an elliptical shape and is attached to and detached from valve seats 11A and 11B formed around the second connection holes 3A, 4A and 3B, 4B of the discharge flow passage E. It is movably installed inside. 12A is a rod member,
Between the first connection hole 2A and the second connection holes 3A and 4A, the insertion hole 13A located concentrically with the first connection hole 2A is movably loosely fitted and inserted, and one end thereof is provided in the valve body 1. It is axially supported by the supporting member 14A. In addition, the rod member 12B is similar to the rod member 12A in the first connection hole 2B and the insertion hole 1.
3B is movably loosely fitted and inserted, and one end thereof is pivotally supported by a support member 14B.

【０００９】１５Ａ、１５Ｂは弁本体１内に並列配設し
た２個の主弁で、供給弁体８Ａ、８Ｂと排出弁体１０
Ａ、１０Ｂとをロッド部材１２Ａ、１２Ｂに外嵌して連
結し、供給弁体８Ａ、８Ｂと排出弁体１０Ａ、１０Ｂの
軸方向位置を、ロッド部材１２Ａ、１２Ｂに外嵌して第
１接続孔２Ａ、２Ｂを遊嵌すると共に挿通孔１３Ａ、１
３Ｂを気密に摺動する筒状部材１６Ａ、１６Ｂにより位
置決め固定して設けている。そして、各主弁１５Ａ、１
５Ｂは、供給弁体８Ａ、８Ｂで第１接続孔２Ａ、２Ｂを
閉じて供給流路Ｐを遮断し排出弁体１０Ａ、１０Ｂで第
２接続孔３Ａ、４Ａ、３Ｂ、４Ｂを開いて負荷流路Ａと
排出流路Ｅを連通する第１位置と、供給弁体８Ａ、８Ｂ
で第１接続孔２Ａ、２Ｂを開いて供給流路Ｐと負荷流路
Ａを連通し排出弁体１０Ａ、１０Ｂで第２接続孔３Ａ、
４Ａ、３Ｂ、４Ｂを閉じて排出流路Ｅを遮断する第２位
置とに移動自在に設けている。Reference numerals 15A and 15B are two main valves which are arranged in parallel in the valve body 1, and are a supply valve body 8A and 8B and a discharge valve body 10.
A and 10B are externally fitted and connected to the rod members 12A and 12B, and axial positions of the supply valve bodies 8A and 8B and the discharge valve bodies 10A and 10B are externally fitted to the rod members 12A and 12B to make a first connection. The holes 2A, 2B are loosely fitted and the insertion holes 13A, 1
3B is positioned and fixed by cylindrical members 16A and 16B that slide in an airtight manner. And each main valve 15A, 1
In 5B, the supply valve bodies 8A and 8B close the first connection holes 2A and 2B to shut off the supply flow path P, and the discharge valve bodies 10A and 10B open the second connection holes 3A, 4A, 3B and 4B to load flow. A first position connecting the passage A and the discharge passage E, and the supply valve bodies 8A and 8B
To open the first connection holes 2A and 2B to communicate the supply flow path P and the load flow path A, and the second connection hole 3A to the discharge valve bodies 10A and 10B.
4A, 3B and 4B are closed to be movable to a second position where the discharge flow path E is blocked.

【００１０】１７Ａ、１７Ｂは各主弁１５Ａ、１５Ｂの
排出弁体１０Ａ、１０Ｂに備えたピストン部材で、排出
弁体１０Ａ、１０Ｂを囲繞する楕円形状の本体部上に突
出して径方向に離した２個のピストン部を有し、このピ
ストン部端面を径方向に離した２個の作用面１８Ａ、１
９Ａ、１８Ｂ、…としている。図３に詳細に示す如く、
２０Ａ、２１Ａは主弁１５Ａのピストン部材１７Ａ背部
に径方向に離して並列配設した２個のパイロット室で、
ピストン部材１７Ａの各ピストン部を弁本体１に有した
樹脂性の案内部材２２Ａに摺動自在に嵌合して２個の作
用面１８Ａ、１９Ａにより区画形成し、パイロット流体
が導入されたり内部のパイロット流体が導出されたりす
るよう設けている。また、主弁１５Ｂのピストン部材１
７Ｂ背部に径方向に離して並列配設した２個のパイロッ
ト室２０Ｂ、２１Ｂも同様にピストン部材１７Ｂの各ピ
ストン部を弁本体１に有した案内部材２２Ｂに摺動自在
に嵌合して２個の作用面１８Ｂ、…により区画形成して
いる。Piston members 17A and 17B are provided on the discharge valve bodies 10A and 10B of the main valves 15A and 15B, respectively, and project on the elliptical main body portion surrounding the discharge valve bodies 10A and 10B and separate them in the radial direction. It has two piston parts, and two working faces 18A, 1A with the end faces of the piston parts separated in the radial direction.
9A, 18B, ... As shown in detail in FIG.
Reference numerals 20A and 21A denote two pilot chambers that are arranged in parallel in the back of the piston member 17A of the main valve 15A and are separated in the radial direction.
Each piston portion of the piston member 17A is slidably fitted to a resin-made guide member 22A provided in the valve body 1 and is partitioned and formed by the two working surfaces 18A and 19A. The pilot fluid is provided so as to be discharged. In addition, the piston member 1 of the main valve 15B
Similarly, two pilot chambers 20B and 21B, which are arranged in parallel at the back of 7B in the radial direction, slidably fit the respective piston portions of the piston member 17B to the guide member 22B provided in the valve body 1 The individual working surfaces 18B, ...

【００１１】主弁１５Ａのピストン部材１７Ａの２個の
作用面１８Ａ、１９Ａにはパイロット室２０Ａ、２１Ａ
に導入したパイロット流体を作用して設け、２個の作用
面１８Ａ、１９Ａは２個のパイロット室２０Ａ、２１Ａ
へのパイロット流体の導入により主弁１５Ａをこのパイ
ロット流体による作用力でばね２３Ａ力および供給弁体
８Ａ背部に作用する供給流路Ｐの圧力流体による作用力
に抗して第２位置に移動すると共に、どちらか１個のパ
イロット室２０Ａもしくは２１Ａへのパイロット流体の
導入ではこのパイロット流体による作用力よりばね２３
Ａ力および供給弁体８Ａ背部に作用する供給流路Ｐの圧
力流体による作用力の方が大きく主弁１５Ａを第１位置
に移動する大きさに形成している。また、主弁１５Ｂの
ピストン部材１７Ｂの２個の作用面１８Ｂ、…も作用面
１８Ａ、１９Ａと同様の大きさに形成している。２３Ｂ
はばね２３Ａと同様に設けたばねである。Pilot chambers 20A and 21A are provided on the two working surfaces 18A and 19A of the piston member 17A of the main valve 15A.
The pilot fluid introduced into the chamber is actuated to provide the two working surfaces 18A and 19A with the two pilot chambers 20A and 21A.
By introducing the pilot fluid into the main valve 15A, the main valve 15A is moved to the second position against the force of the spring 23A by the action force of the pilot fluid and the action force of the pressure fluid of the supply passage P acting on the back portion of the supply valve body 8A. At the same time, when the pilot fluid is introduced into either one of the pilot chambers 20A or 21A, the spring 23 is generated by the action force of this pilot fluid.
The force A and the acting force of the pressure fluid in the supply passage P acting on the back portion of the supply valve body 8A are larger, and the main valve 15A is formed to have a size to move to the first position. Further, the two working surfaces 18B, ... Of the piston member 17B of the main valve 15B are also formed in the same size as the working surfaces 18A, 19A. 23B
Is a spring provided similarly to the spring 23A.

【００１２】２４は弁本体１の上部に流路形成部材２
５、急速排出弁本体２６を介し設置したパイロット電磁
弁本体で、各主弁１５Ａ、１５Ｂをパイロット操作する
２個のパイロット電磁弁２７Ａ、２７Ｂを有している。
各パイロット電磁弁２７Ａ、２７Ｂは、供給流路Ｐの圧
力流体の一部をパイロット流体として供給するパイロッ
ト供給流路２８Ａ、２８Ｂと、パイロット負荷流路２９
Ａ、２９Ｂと、排出流路Ｅへ流路３０を介して接続する
パイロット排出流路３１Ａ、３１Ｂとを有し、非通電で
はパイロット供給流路２８Ａ、２８Ｂを遮断しパイロッ
ト負荷流路２９Ａ、２９Ｂとパイロット排出流路３１
Ａ、３１Ｂを連通すると共に、通電ではパイロット供給
流路２８Ａ、２８Ｂとパイロット負荷流路２９Ａ、２９
Ｂを連通しパイロット排出流路３１Ａ、３１Ｂを遮断す
るよう設けている。パイロット電磁弁２７Ａのパイロッ
ト負荷流路２９Ａは後述詳記する急速排出弁３２Ａを介
して流路形成部材２５に形成した接続流路３３Ａに接続
し、接続流路３３Ａは主弁１５Ａの１個のパイロット室
２０Ａと主弁１５Ｂの１個のパイロット室２０Ｂとに接
続している。また、パイロット電磁弁２７Ｂのパイロッ
ト負荷流路２９Ｂは同様に急速排出弁３２Ｂを介して接
続流路３３Ｂに接続し、接続流路３３Ｂは主弁１５Ａの
残りの１個のパイロット室２１Ａと主弁１５Ｂの残りの
１個のパイロット室２１Ｂとに接続している。Reference numeral 24 denotes a flow path forming member 2 on the upper part of the valve body 1.
5. A pilot solenoid valve body installed via the quick discharge valve body 26, and has two pilot solenoid valves 27A, 27B for pilot-operating each main valve 15A, 15B.
Each pilot solenoid valve 27A, 27B has a pilot supply passage 28A, 28B for supplying a part of the pressure fluid in the supply passage P as a pilot fluid, and a pilot load passage 29.
A and 29B, and pilot discharge flow paths 31A and 31B connected to the discharge flow path E via the flow path 30. When not energized, the pilot supply flow paths 28A and 28B are cut off, and pilot load flow paths 29A and 29B. And pilot discharge channel 31
A and 31B are connected to each other, and the pilot supply flow paths 28A and 28B and the pilot load flow paths 29A and 29 are energized.
It is provided so that B is communicated with and the pilot discharge channels 31A and 31B are blocked. The pilot load flow passage 29A of the pilot solenoid valve 27A is connected to a connection flow passage 33A formed in the flow passage forming member 25 via a quick discharge valve 32A described later, and the connection flow passage 33A is one of the main valves 15A. It is connected to the pilot chamber 20A and one pilot chamber 20B of the main valve 15B. Similarly, the pilot load passage 29B of the pilot solenoid valve 27B is similarly connected to the connection passage 33B via the quick discharge valve 32B, and the connection passage 33B is connected to the remaining one pilot chamber 21A of the main valve 15A and the main valve. It is connected to the remaining one pilot chamber 21B of 15B.

【００１３】急速排出弁３２Ａ、３２Ｂは、急速排出弁
本体２６内に弁体３４Ａ、３４Ｂを移動自在に収装し、
弁体３４Ａ、３４Ｂはパイロット流体による作用力で図
１の上下方向へ移動して排出流路Ｅへ接続する急速排出
流路３５Ａ、３５Ｂを開閉自在に設け、弁体３４Ａ、３
４Ｂの外周にはパイロット電磁弁２７Ａ、２７Ｂのパイ
ロット負荷流路２９Ａ、２９Ｂ側から接続流路３３Ａ、
３３Ｂ側への流れを許容しその逆方向への流れを阻止す
るリップ部材３６Ａ、３６Ｂを装着している。The quick discharge valves 32A and 32B have valve bodies 34A and 34B movably accommodated in the quick discharge valve body 26,
The valve bodies 34A and 34B are provided with open and close quick discharge flow paths 35A and 35B that move in the vertical direction of FIG.
On the outer periphery of 4B, from the pilot load flow paths 29A, 29B of the pilot solenoid valves 27A, 27B, to the connection flow path 33A,
Lip members 36A and 36B that allow the flow to the 33B side and block the flow in the opposite direction are mounted.

【００１４】次に、かかる構成の作動を説明する。図１
および図２は、２個のパイロット電磁弁２７Ａ、２７Ｂ
の非通電状態を示し、各パイロット電磁弁２７Ａ、２７
Ｂはパイロット供給流路２８Ａ、２８Ｂを遮断しパイロ
ット負荷流路２９Ａ、２９Ｂとパイロット排出流路３１
Ａ、３１Ｂを連通し、２個の主弁１５Ａ、１５Ｂはばね
２３Ａ、２３Ｂ力および供給弁体８Ａ、８Ｂ背部に作用
する供給流路Ｐの圧力流体による作用力で第１位置に移
動しており、供給弁体８Ａ、８Ｂが弁座９Ａ、９Ｂに着
座して第１接続孔２Ａ、２Ｂを閉じて供給流路Ｐを遮断
し排出弁体１０Ａ、１０Ｂが弁座１１Ａ、１１Ｂより離
脱して第２接続孔３Ａ、４Ａ、３Ｂ、４Ｂを開いて負荷
流路Ａと排出流路Ｅを連通している。Next, the operation of this structure will be described. Figure 1
2 shows two pilot solenoid valves 27A and 27B.
Of the pilot solenoid valves 27A, 27
B cuts off the pilot supply passages 28A and 28B and closes the pilot load passages 29A and 29B and the pilot discharge passage 31.
The two main valves 15A and 15B are connected to A and 31B, and the two main valves 15A and 15B are moved to the first position by the force of the springs 23A and 23B and the force of the pressure fluid in the supply passage P acting on the back of the supply valve bodies 8A and 8B. The supply valve bodies 8A, 8B are seated on the valve seats 9A, 9B to close the first connection holes 2A, 2B to shut off the supply flow passage P and the discharge valve bodies 10A, 10B are separated from the valve seats 11A, 11B. The second connection holes 3A, 4A, 3B, 4B are opened to connect the load passage A and the discharge passage E.

【００１５】図の状態より、２個のパイロット電磁弁２
７Ａ、２７Ｂを通電し各パイロット電磁弁２７Ａ、２７
Ｂが整合作動すると、各パイロット電磁弁２７Ａ、２７
Ｂはパイロット供給流路２８Ａ、２８Ｂとパイロット負
荷流路２９Ａ、２９Ｂを連通しパイロット排出流路３１
Ａ、３１Ｂを遮断し、供給流路Ｐの圧力流体の一部であ
るパイロット流体はパイロット供給流路２８Ａ、２８Ｂ
よりパイロット負荷流路２９Ａ、２９Ｂを流れ急速排出
弁３２Ａ、３２Ｂのリップ部材３６Ａ、３６Ｂを押し下
げて接続流路３３Ａ、３３Ｂを流れ、接続流路３３Ａを
流れたパイロット流体は主弁１５Ａのパイロット室２０
Ａと主弁１５Ｂのパイロット室２０Ｂに導入され、接続
流路３３Ｂを流れたパイロット流体は主弁１５Ａのパイ
ロット室２１Ａと主弁１５Ｂのパイロット室２１Ｂに導
入される。このとき、急速排出弁３２Ａ、３２Ｂの弁体
３４Ａ、３４Ｂは背部に作用するパイロット流体による
作用力で図示位置に位置して急速排出流路３５Ａ、３５
Ｂを閉じている。２個の主弁１５Ａ、１５Ｂは、それぞ
れ２個のパイロット室２０Ａ、２１Ａおよび２０Ｂ、２
１Ｂに導入されて各作用面１８Ａ、１９Ａおよび１８
Ｂ、…に作用するパイロット流体による作用力でばね２
３Ａ、２３Ｂ力および供給弁体８Ａ、８Ｂ背部に作用す
る供給流路Ｐの圧力流体による作用力に抗して図１の下
方向に第１位置から第２位置に移動し、供給弁体８Ａ、
８Ｂが弁座９Ａ、９Ｂより離脱して第１接続孔２Ａ、２
Ｂを開いて供給流路Ｐと負荷流路Ａを連通し排出弁体１
０Ａ、１０Ｂが弁座１１Ａ、１１Ｂに着座して第２接続
孔３Ａ、４Ａ、３Ｂ、４Ｂを閉じて排出流路Ｅを遮断す
る。そして、圧力流体が供給流路Ｐより負荷流路Ａを流
れて図示しない流体アクチュエータに導入されて作動制
御され、流体アクチュエータはクラッチ・ブレーキ等を
駆動操作する。From the state shown in the figure, two pilot solenoid valves 2
7A and 27B are energized and pilot solenoid valves 27A and 27
When B is aligned, each pilot solenoid valve 27A, 27
B is a pilot discharge passage 31 that connects the pilot supply passages 28A and 28B and the pilot load passages 29A and 29B.
The pilot fluid, which is a part of the pressure fluid in the supply passage P, is cut off from A and 31B, and pilot supply passages 28A and 28B
Flow through the pilot load flow paths 29A and 29B, push down the lip members 36A and 36B of the rapid discharge valves 32A and 32B, flow through the connection flow paths 33A and 33B, and the pilot fluid flowing through the connection flow path 33A is the pilot chamber of the main valve 15A. 20
The pilot fluid introduced into A and the pilot chamber 20B of the main valve 15B and flowing through the connection passage 33B is introduced into the pilot chamber 21A of the main valve 15A and the pilot chamber 21B of the main valve 15B. At this time, the valve bodies 34A, 34B of the quick discharge valves 32A, 32B are located at the positions shown by the action force of the pilot fluid acting on the back portion, and the rapid discharge flow paths 35A, 35B.
B is closed. The two main valves 15A, 15B have two pilot chambers 20A, 21A and 20B, 2
1B introduced into each working surface 18A, 19A and 18
Spring 2 by the action force of the pilot fluid acting on B, ...
3A, 23B force and the supply valve bodies 8A, 8B are moved downward from the first position to the second position in FIG. ,
8B is disengaged from the valve seats 9A and 9B and the first connecting holes 2A and 2B
B is opened to connect the supply flow path P and the load flow path A to each other and the discharge valve body 1
0A and 10B are seated on the valve seats 11A and 11B to close the second connection holes 3A, 4A, 3B and 4B and shut off the discharge passage E. Then, the pressure fluid flows from the supply flow path P through the load flow path A and is introduced into a fluid actuator (not shown) for operation control, and the fluid actuator drives and operates a clutch / brake or the like.

【００１６】２個のパイロット電磁弁２７Ａ、２７Ｂを
通電状態から非通電にして各パイロット電磁弁２７Ａ、
２７Ｂが整合作動すると、各パイロット電磁弁２７Ａ、
２７Ｂはパイロット供給流路２８Ａ、２８Ｂを遮断しパ
イロット負荷流路２９Ａ、２９Ｂとパイロット排出流路
３１Ａ、３１Ｂを連通し、パイロット供給流路２８Ａ、
２８Ｂのパイロット流体は各パイロット電磁弁２７Ａ、
２７Ｂで遮断され、急速排出弁３２Ａ、３２Ｂの弁体３
４Ａ、３４Ｂは背部に使用していたパイロット流体によ
る作用力がなくなり頭部に作用するパイロット流体によ
る作用力で図１の上方向に移動して急速排出流路３５
Ａ、３５Ｂを開き、パイロット室２０Ａ、２０Ｂ内のパ
イロット流体は接続流路３３Ａを流れ急速排出弁３２Ａ
のリップ部材３６Ａでパイロット負荷流路２９Ａ側への
流れを阻止され、開いた急速排出流路３５Ａより急速に
導出される。同様に、パイロット室２１Ａ、２１Ｂ内の
パイロット流体は接続流路３３Ｂを流れ開いた急速排出
流路３５Ｂより急速に導出される。２個の主弁１５Ａ、
１５Ｂは各作用面１８Ａ、１９Ａ、１８Ｂ、…に作用す
るパイロット流体による作用力がなくなりばね２３Ａ、
２３Ｂおよび供給弁体８Ａ、８Ｂ背部に作用する供給流
路Ｐの圧力流体による作用力で上方向に第２位置から図
１状態の第１位置に移動し、供給流路Ｐを遮断し負荷流
路Ａと排出流路Ｅを連通する。そして、負荷流路Ａの圧
力降下が短時間で行われ流体アクチュエータは流体をす
みやかに排出して作動制御されクラッチ・ブレーキ等を
駆動操作する。The two pilot solenoid valves 27A and 27B are deenergized from the energized state, and the pilot solenoid valves 27A and 27B are deenergized.
When 27B is aligned, each pilot solenoid valve 27A,
27B cuts off the pilot supply flow passages 28A and 28B to connect the pilot load flow passages 29A and 29B and the pilot discharge flow passages 31A and 31B, and the pilot supply flow passages 28A and 28B.
The pilot fluid of 28B is each pilot solenoid valve 27A,
The valve body 3 of the quick discharge valves 32A and 32B is shut off by 27B.
4A and 34B move upward in FIG. 1 by the action force of the pilot fluid acting on the head, because the action force of the pilot fluid used on the back portion disappears, and the rapid discharge passage 35
A and 35B are opened, and the pilot fluid in the pilot chambers 20A and 20B flows through the connection flow path 33A and the quick discharge valve 32A.
The lip member 36A blocks the flow toward the pilot load flow passage 29A, and is rapidly led out from the open rapid discharge flow passage 35A. Similarly, the pilot fluid in the pilot chambers 21A and 21B is rapidly drawn out from the rapid discharge flow path 35B that opens in the connection flow path 33B. 2 main valves 15A,
15B, the acting force due to the pilot fluid acting on each acting surface 18A, 19A, 18B, ...
23B and the supply valve bodies 8A and 8B, the force of the pressure fluid in the supply passage P acting on the back moves upward from the second position to the first position in the state of FIG. The passage A and the discharge passage E are communicated with each other. Then, the pressure drop in the load passage A is performed in a short time, and the fluid actuator promptly discharges the fluid to control the operation and drive the clutch / brake or the like.

【００１７】次に、２個のパイロット電磁弁２２Ａ、２
２Ｂのうちいずれか一方がコイルの焼損等により故障し
不整合作動した場合について説明する。２個の主弁１５
Ａ、１５Ｂが第１位置に移動している２個のパイロット
電磁弁２７Ａ、２７Ｂの非通電状態から通電しパイロッ
ト電磁弁２７Ａのみが作動した場合、パイロット供給流
路２８Ｂを流れるパイロット流体はパイロット電磁弁２
７Ｂで遮断され、各主弁１５Ａ、１５Ｂのそれぞれ１個
のパイロット室２１Ａ、２１Ｂにはパイロット流体が導
入されない。また、パイロット供給流路２８Ａを流れる
パイロット流体はパイロット負荷流路２９Ａより急速排
出弁３２Ａを介し接続流路３３Ａを流れ各主弁１５Ａ、
１５Ｂのそれぞれ残りの１個のパイロット室２０Ａ、２
０Ｂに導入される。２個の主弁１５Ａ、１５Ｂはそれぞ
れ１個のパイロット室２０Ａ、２０Ｂに導入されて作用
面１８Ａ、１８Ｂに作用するパイロット流体による作用
力よりばね２３Ａ、２３Ｂ力および供給弁体８Ａ、８Ｂ
背部に作用する供給流路Ｐの圧力流体による作用力の方
が大きくともに第１位置に移動したままであり、供給流
路Ｐを遮断し負荷流路Ａを排出流路Ｅと連通する。Next, two pilot solenoid valves 22A, 2
A case will be described in which any one of 2B fails due to burnout of the coil or the like and causes a mismatch operation. 2 main valves 15
When two pilot solenoid valves 27A, 27B in which A and 15B are moving to the first position are energized from the non-energized state and only the pilot solenoid valve 27A is operated, the pilot fluid flowing through the pilot supply passage 28B is the pilot solenoid valve. Valve 2
The pilot fluid is not introduced into the pilot chambers 21A and 21B of the main valves 15A and 15B, respectively. Further, the pilot fluid flowing through the pilot supply flow passage 28A flows through the connection flow passage 33A from the pilot load flow passage 29A through the quick discharge valve 32A, and each main valve 15A,
Remaining one pilot room 20A of 15B, 2 respectively
Introduced in OB. The two main valves 15A and 15B are introduced into one pilot chamber 20A and 20B, respectively, and the springs 23A and 23B and the supply valve bodies 8A and 8B are generated by the action force of the pilot fluid acting on the action surfaces 18A and 18B.
The force exerted by the pressure fluid in the supply passage P acting on the back portion is larger than the other force and remains moving to the first position, so that the supply passage P is blocked and the load passage A communicates with the discharge passage E.

【００１８】また、２個の主弁１５Ａ、１５Ｂが第２位
置に移動している２個のパイロット電磁弁２７Ａ、２７
Ｂの通電状態から非通電にしパイロット電磁弁２７Ａの
みが作動した場合、パイロット供給流路２８Ａを流れる
パイロット流体はパイロット電磁弁２７Ａで遮断され、
各主弁１５Ａ、１５Ｂのそれぞれ１個のパイロット室２
０Ａ、２０Ｂにはパイロット流体が導入されなくなる。
また、各主弁１５Ａ、１５Ｂのそれぞれ残りの１個のパ
イロット室２１Ａ、２１Ｂにはパイロット供給流路２８
Ｂのパイロット流体がパイロット負荷流路２９Ｂより急
速排出弁３２Ｂを介し接続流路３３Ｂを流れ導入されつ
づける。２個の主弁１５Ａ、１５Ｂはばね２３Ａ、２３
Ｂ力および供給弁体８Ａ、８Ｂ背部に作用する供給流路
Ｐの圧力流体による作用力でそれぞれ１個のパイロット
室２１Ａ、２１Ｂに導入されて作用面１９Ａ、…に作用
するパイロット流体による作用力に抗してともに第２位
置から第１位置に移動し、供給流路Ｐを遮断し負荷流路
Ａを排出流路Ｅと連通する。よって、負荷流路Ａの圧力
降下が２個のパイロット電磁弁２７Ａ、２７Ｂの整合作
動時と略等しい短時間で行われる。尚、パイロット電磁
弁２７Ａのみが作動した場合について説明したが、パイ
ロット電磁弁２７Ｂのみが作動した場合も同様に２個の
主弁１５Ａ、１５Ｂはともに第１位置に移動する。Also, two pilot solenoid valves 27A, 27 whose two main valves 15A, 15B are moving to the second position.
When only the pilot solenoid valve 27A is operated by turning off the energization state of B, the pilot fluid flowing through the pilot supply passage 28A is blocked by the pilot solenoid valve 27A,
One pilot chamber 2 for each main valve 15A, 15B
No pilot fluid is introduced into 0A and 20B.
Further, the pilot supply passage 28 is provided in the remaining one pilot chamber 21A, 21B of each main valve 15A, 15B.
The pilot fluid of B continues to be introduced from the pilot load flow passage 29B through the rapid discharge valve 32B through the connection flow passage 33B. The two main valves 15A, 15B are springs 23A, 23
B force and the action force of the pilot fluid which is introduced into one pilot chamber 21A, 21B by the action force of the pressure fluid in the supply passage P acting on the back portions of the supply valve bodies 8A, 8B and acts on the action surfaces 19A ,. Against this, both move from the second position to the first position, the supply flow path P is blocked, and the load flow path A communicates with the discharge flow path E. Therefore, the pressure drop in the load passage A is performed in a short time substantially equal to the matching operation of the two pilot solenoid valves 27A and 27B. Although the case where only the pilot solenoid valve 27A operates has been described, both of the two main valves 15A and 15B also move to the first position when only the pilot solenoid valve 27B operates.

【００１９】かかる作動で、いずれか一方のパイロット
電磁弁２７Ａもしくは２７Ｂの故障による２個のパイロ
ット電磁弁２７Ａ、２７Ｂの不整合作動時、２個の主弁
１５Ａ、１５Ｂのそれぞれ１個のパイロット室２０Ａ、
２０Ｂもしくは２１Ａ、２１Ｂにパイロット流体が導入
され、それぞれ残りの１個のパイロット室２１Ａ、２１
Ｂもしくは２０Ａ、２０Ｂにはパイロット流体がパイロ
ット電磁弁２７Ｂもしくは２７Ａで遮断されて導入され
ず、２個の主弁１５Ａ、１５Ｂはともに第１位置に移動
して供給弁体８Ａ、８Ｂが第１接続孔２Ａ、２Ｂを閉じ
て供給流路Ｐを遮断し排出弁体１０Ａ、１０Ｂが第２接
続孔３Ａ、４Ａ、３Ｂ、４Ｂを開いて負荷流路Ａと排出
流路Ｅを連通するため、負荷流路Ａの圧力降下を短時間
で得られると共に、パイロット流体を低圧側に導出する
ことなくできて一部をパイロット流体とする供給流路Ｐ
の圧力流体の浪費を確実に防止することができる。ま
た、主弁１５Ａ（主弁１５Ｂも同様なので説明を省略す
る）は径方向に離して並列配設した２個のパイロット室
２０Ａと２１Ａを区画形成する径方向に離した２個の作
用面１８Ａと１９Ａを有するピストン部材１７Ａを径方
向に大きく設け、径方向に大きく設けたピストン部材１
７Ａを備える排出弁体１０Ａを径方向に大きく設けるこ
とができ、径方向に大きく設けた排出弁体１０Ａで開閉
する第２接続孔３Ａ、４Ａは２個形成することで流体の
流通面積を大きく設けることができて流通する流体の流
量増加が図れ、主弁１５Ａの第１位置への移動で負荷流
路Ａの圧力降下を一層短時間で良好に得ることができ
る。In such an operation, when one pilot solenoid valve 27A or 27B is out of order due to a failure of the two pilot solenoid valves 27A and 27B, one pilot chamber of each of the two main valves 15A and 15B is provided. 20A,
The pilot fluid is introduced into 20B or 21A, 21B, and the remaining one pilot chamber 21A, 21
Pilot fluid is not introduced into B or 20A, 20B by the pilot solenoid valve 27B or 27A, so that the two main valves 15A, 15B both move to the first position and the supply valve elements 8A, 8B move to the first position. Since the connection holes 2A and 2B are closed to shut off the supply passage P and the discharge valve bodies 10A and 10B open the second connection holes 3A, 4A, 3B and 4B to connect the load passage A and the discharge passage E, The pressure drop in the load flow path A can be obtained in a short time, and the supply flow path P in which the pilot fluid can be partly used as the pilot fluid without leading the pilot fluid to the low pressure side
It is possible to reliably prevent the waste of the pressure fluid. Further, the main valve 15A (the main valve 15B is also the same, so description thereof is omitted) has two working surfaces 18A which are separated in the radial direction and are arranged in parallel so as to partition and form two pilot chambers 20A and 21A. And a piston member 17A having a large size in the radial direction.
A large discharge valve body 10A including 7A can be provided in the radial direction, and by forming two second connection holes 3A and 4A that are opened and closed by the discharge valve body 10A that is provided in the large radial direction, the fluid flow area can be increased. The flow rate of the fluid that can be provided can be increased, and the pressure drop in the load passage A can be satisfactorily obtained in a shorter time by moving the main valve 15A to the first position.

【００２０】図７ないし図９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。負荷流路Ａと排出
流路Ｅとを接続する第２接続孔３７Ａ、３７Ｂは、排出
弁体１０Ａ、１０Ｂより若干小さい楕円形状に設け、２
個平行に形成している。そして、２個の第２接続孔３７
Ａ、３７Ｂには、各主弁１５Ａ、１５Ｂのロッド部材１
２Ａ、１２Ｂ、筒状部材１６Ａ、１６Ｂをそれぞれ遊嵌
して連通している。主弁１５Ａの１個のパイロット室２
０Ａと主弁１５Ｂの１個のパイロット室２０Ｂとに接続
した接続流路３３Ａには、パイロット電磁弁２７Ａのパ
イロット負荷流路２９Ａを直接に接続して設けている。
また、同様に各主弁１５Ａ、１５Ｂのそれぞれ残りの１
個のパイロット室に接続した接続流路３３Ｂには、パイ
ロット電磁弁２７Ｂのパイロット負荷流路２９Ｂを直接
に接続して設けている。7 to 9 show 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. The second connection holes 37A and 37B connecting the load flow path A and the discharge flow path E are provided in an elliptical shape slightly smaller than the discharge valve bodies 10A and 10B.
They are formed in parallel. And two second connection holes 37
A and 37B have rod members 1 of the main valves 15A and 15B, respectively.
2A, 12B and cylindrical members 16A, 16B are loosely fitted and communicated with each other. One pilot chamber 2 for main valve 15A
The pilot flow passage 29A of the pilot electromagnetic valve 27A is directly connected to the connection flow passage 33A connected to the 0A and one pilot chamber 20B of the main valve 15B.
Similarly, the remaining 1 of each main valve 15A, 15B
The pilot flow passage 29B of the pilot solenoid valve 27B is directly connected to the connection flow passage 33B connected to each pilot chamber.

【００２１】作動は、各主弁１５Ａ、１５Ｂのパイロッ
ト室２０Ａ、２０Ｂ、…にパイロット流体がパイロット
負荷流路２９Ａ、２９Ｂ、接続流路３３Ａ、３３Ｂを流
れて導入されたり、パイロット室２０Ａ、２０Ｂ、…内
のパイロット流体が接続流路３３Ａ、３３Ｂ、パイロッ
ト負荷流路２９Ａ、２９Ｂを流れてパイロット排出流路
３１Ａ、３１Ｂより導出されたりして、各パイロット電
磁弁２７Ａ、２７Ｂの整合作動時、不整合作動時ともに
一実施例と同様の作動が得られる。そして、各主弁１５
Ａ、１５Ｂの第１位置への移動では、負荷流路Ａの流体
が楕円形状の接続孔３７Ａ、３７Ｂを流れ排出流路Ｅよ
り排出される。In operation, the pilot fluid is introduced into the pilot chambers 20A, 20B, ... Of the main valves 15A, 15B by flowing through the pilot load flow channels 29A, 29B and the connection flow channels 33A, 33B, or the pilot chambers 20A, 20B. , The pilot fluid in the flow paths 33A, 33B and the pilot load flow paths 29A, 29B is led out from the pilot discharge flow paths 31A, 31B, and when the pilot solenoid valves 27A, 27B are aligned, An operation similar to that of the first embodiment can be obtained during the mismatch operation. And each main valve 15
In the movement of A and 15B to the first position, the fluid in the load channel A flows through the elliptical connection holes 37A and 37B and is discharged from the discharge channel E.

【００２２】かかる作動で、２個のパイロット電磁弁２
７Ａ、２７Ｂの不整合作動時、一実施例と同様に、２個
の主弁１５Ａ、１５Ｂがともに供給流路Ｐを遮断し負荷
流路Ａと排出流路Ｅを連通する第１位置に移動できて負
荷流路Ａの圧力降下を短時間で得られると共に、パイロ
ット流体を低圧側に導出することなくできて一部をパイ
ロット流体とする供給流路Ｐの圧力流体の浪費を確実に
防止することができる。また、主弁１５Ａ（主弁１５Ｂ
も同様なので説明を省略する）は径方向に離して並列配
設した２個のパイロット室２０Ａ、…を区画形成する径
方向に離した２個の作用面１８Ａ、…を有するピストン
部材１７Ａを径方向に大きく設け、この径方向に大きく
設けたピストン部材１７Ａを備える排出弁体１０Ａを径
方向に大きく設けることができ、径方向に大きく設けた
排出弁体１０Ａで開閉する第２接続孔３７Ａは楕円形状
で径方向に大きくして流体の流通面積を大きく設けるこ
とができて流通する流体の流量増加が図れ、主弁１５Ａ
の第１位置への移動で負荷流路Ａの圧力降下を一層短時
間で良好に得ることができる。With this operation, the two pilot solenoid valves 2
When the 7A and 27B are misaligned, the two main valves 15A and 15B both move to the first position where the supply flow path P is blocked and the load flow path A and the discharge flow path E are communicated with each other, as in the embodiment. As a result, the pressure drop in the load channel A can be obtained in a short time, and the pressure fluid in the supply channel P, a part of which serves as the pilot fluid, can be reliably prevented without wasting the pilot fluid on the low pressure side. be able to. In addition, the main valve 15A (main valve 15B
The description is omitted because the same is true of the piston member 17A having two working surfaces 18A radially separated from each other, which form two pilot chambers 20A radially arranged in parallel. The discharge valve body 10A provided with a large piston member 17A provided in the radial direction can be provided with a large size in the radial direction, and the second connection hole 37A opened and closed by the discharge valve body 10A provided with a large radial direction is The elliptical shape can be made large in the radial direction to provide a large fluid flow area, and the flow rate of the fluid can be increased.
By moving to the first position, the pressure drop in the load passage A can be satisfactorily obtained in a shorter time.

【００２３】尚、一実施例に設けた急速排出弁３２Ａ、
３２Ｂを他実施例に設けても良く、また一実施例の急速
排出弁３２Ａ、３２Ｂを設けないようにしても良い。さ
らにまた、一実施例の第２接続孔３Ａ、４Ａ、３Ｂ、４
Ｂを他実施例に適用したり他実施例の第２接続孔３７
Ａ、３７Ｂを一実施例に適用したりしても良い。The quick discharge valve 32A provided in one embodiment,
32B may be provided in another embodiment, or the quick discharge valves 32A and 32B of one embodiment may not be provided. Furthermore, the second connection holes 3A, 4A, 3B, 4 of one embodiment
B is applied to another embodiment or the second connection hole 37 of another embodiment is used.
A and 37B may be applied to one embodiment.

【００２４】[0024]

【発明の効果】このように本発明は、圧力流体を供給す
る供給流路とこの供給流路より順次軸方向に離して流体
アクチュエータへ接続する負荷流路と低圧側へ接続する
排出流路とを弁本体に有し、供給流路と負荷流路とを第
１接続孔で接続すると共に、負荷流路と排出流路とを第
２接続孔で接続して設け、弁本体の供給流路内に移動自
在に設けて第１接続孔を開閉する供給弁体と弁本体の排
出流路内に移動自在に設けて第２接続孔を開閉する排出
弁体とを連結してそれぞれ備えた２個の主弁を弁本体内
に並列配設し、各主弁は供給弁体で第１接続孔を閉じて
供給流路を遮断し排出弁体で第２接続孔を開いて負荷流
路と排出流路を連通する第１位置と、供給弁体で第１接
続孔を開いて供給流路と負荷流路を連通し排出弁体で第
２接続孔を閉じて排出流路を遮断する第２位置とに移動
自在に設け、各主弁の排出弁体にはそれぞれ径方向に離
した２個の作用面を有するピストン部材を備え、各主弁
のピストン部材背部には各作用面により区画形成したそ
れぞれ２個のパイロット室を径方向に離して並列配設
し、供給流路の圧力流体の一部をパイロット流体として
主弁のパイロット室に導入したり供給流路からのパイロ
ット流体を遮断してパイロット室内のパイロット流体を
低圧側に導出したりする２個のパイロット電磁弁を設
け、２個のパイロット電磁弁の一方を各主弁のそれぞれ
１個のパイロット室に接続すると共に、他方を各主弁の
それぞれ残りの１個のパイロット室に接続し、パイロッ
ト室に導入したパイロット流体が作用する主弁のピスト
ン部材の各作用面は、２個のパイロット室へのパイロッ
ト流体の導入により各主弁を第２位置に移動すると共
に、１個のパイロット室へのパイロット流体の導入では
各主弁を第１位置に移動する大きさに形成したことによ
り、２個のパイロット電磁弁の不整合作動時、２個の主
弁がともに供給流路を遮断し負荷流路と排出流路を連通
する第１位置に移動できて負荷流路の圧力降下を短時間
で得られると共に、パイロット流体を低圧側に導出する
ことなくできて一部をパイロット流体とする供給流路の
圧力流体の浪費を確実に防止することができる。また、
各主弁はそれぞれ径方向に離して並列配設した２個のパ
イロット室を区画形成する径方向に離した２個の作用面
を有するピストン部材を径方向に大きく設け、径方向に
大きく設けたピストン部材を備える排出弁体を径方向に
大きく設けることができ、径方向に大きく設けた排出弁
体で開閉する第２接続孔は流体の流通面積を大きく設け
ることができて流通する流体の流量増加が図れ、各主弁
の第１位置への移動で負荷流路の圧力降下を一層短時間
で良好に得ることができる効果を有する。As described above, according to the present invention, the supply flow passage for supplying the pressure fluid, the load flow passage which is sequentially separated from the supply flow passage in the axial direction and which is connected to the fluid actuator, and the discharge flow passage which is connected to the low pressure side are provided. The valve body, the supply channel and the load channel are connected by the first connection hole, and the load channel and the discharge channel are connected by the second connection hole. A supply valve body that is movably provided inside to open and close the first connection hole, and a discharge valve body that is movably provided inside the discharge flow path of the valve body to open and close the second connection hole, are provided in combination. Individual main valves are arranged in parallel in the valve body, and each main valve closes the first connection hole with the supply valve body to block the supply flow passage and opens the second connection hole with the discharge valve body to form the load flow passage. The first position where the discharge flow path communicates with the supply valve body opens the first connection hole so that the supply flow path and the load flow path communicate with each other, and the discharge valve body closes the second connection hole. It is movably provided at a second position that blocks the outlet flow path, and the discharge valve body of each main valve is provided with a piston member having two working surfaces that are separated in the radial direction, and the piston member back of each main valve is provided. The two pilot chambers, which are defined by the respective operating surfaces, are arranged in parallel in the radial direction, and a part of the pressure fluid in the supply passage is introduced as pilot fluid into the pilot chamber of the main valve or the supply flow is increased. Two pilot solenoid valves for shutting off the pilot fluid from the passage and leading the pilot fluid in the pilot chamber to the low pressure side are provided, one of the two pilot solenoid valves being one pilot chamber for each main valve And the other is connected to the remaining one pilot chamber of each main valve, and each working surface of the piston member of the main valve on which the pilot fluid introduced into the pilot chamber acts has two pilot chambers. By introducing the pilot fluid into the pilot chamber, the main valve is moved to the second position, and when introducing the pilot fluid into one pilot chamber, the main valve is moved to the first position. When the pilot solenoid valves are misaligned, the two main valves can both move to the first position where they block the supply flow path and connect the load flow path and the discharge flow path, reducing the pressure drop in the load flow path for a short time. In addition, it is possible to reliably prevent the waste of the pressure fluid in the supply flow path, a part of which serves as the pilot fluid, because it is possible to prevent the pilot fluid from being discharged to the low pressure side. Also,
Each main valve is provided with a large piston member in the radial direction, which is provided with a large piston member in the radial direction and which has two working surfaces separated in the radial direction that form two pilot chambers arranged in parallel in the radial direction. A large discharge valve body having a piston member can be provided in the radial direction, and the second connection hole opened and closed by the large discharge valve body provided in the radial direction can have a large flow area for the fluid, and the flow rate of the flowing fluid. There is an effect that the pressure can be increased and the pressure drop in the load passage can be satisfactorily obtained in a shorter time by the movement of each main valve to the first position.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例を示す複合電磁切換弁の縦断
面図である。FIG. 1 is a vertical sectional view of a composite electromagnetic switching valve showing an embodiment of the present invention.

【図２】図１の線Ｂ−Ｂに沿った断面図である。FIG. 2 is a cross-sectional view taken along the line BB of FIG.

【図３】図１の線Ｃ−Ｃに沿った断面図である。3 is a cross-sectional view taken along the line CC of FIG.

【図４】図１の線Ｄ−Ｄに沿った断面図である。FIG. 4 is a cross-sectional view taken along the line DD of FIG.

【図５】図１の線Ｆ−Ｆに沿った断面図である。5 is a cross-sectional view taken along the line FF of FIG.

【図６】一実施例の回路図である。FIG. 6 is a circuit diagram of an example.

【図７】他実施例の縦断面図である。FIG. 7 is a vertical cross-sectional view of another embodiment.

【図８】図７の線Ｇ−Ｇに沿った断面図である。8 is a cross-sectional view taken along the line GG of FIG.

【図９】他実施例の回路図である。FIG. 9 is a circuit diagram of another embodiment.

【図１０】従来例の回路図である。FIG. 10 is a circuit diagram of a conventional example.

【符号の説明】[Explanation of symbols]

１弁本体 ２Ａ、２Ｂ第１接続孔 ３Ａ、３Ｂ、４Ａ、４Ｂ、３７Ａ、３７Ｂ第２接続孔 ８Ａ、８Ｂ供給弁体 １０Ａ、１０Ｂ、排出弁体 １５Ａ、１５Ｂ主弁 １７Ａ、１７Ｂピストン部材 １８Ａ、１８Ｂ、１９Ａ作用面 ２０Ａ、２０Ｂ、２１Ａ、２１Ｂパイロット室 ２７Ａ、２７Ｂパイロット電磁弁 Ｐ供給流路 Ａ負荷流路 Ｅ排出流路 1 valve body 2A, 2B first connection hole 3A, 3B, 4A, 4B, 37A, 37B second connection hole 8A, 8B supply valve body 10A, 10B, discharge valve body 15A, 15B main valve 17A, 17B piston member 18A, 18B, 19A Working surface 20A, 20B, 21A, 21B Pilot chamber 27A, 27B Pilot solenoid valve P Supply flow path A Load flow path E Discharge flow path

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 圧力流体を供給する供給流路とこの供給
流路より順次軸方向に離して流体アクチュエータへ接続
する負荷流路と低圧側へ接続する排出流路とを弁本体に
有し、供給流路と負荷流路とを第１接続孔で接続すると
共に、負荷流路と排出流路とを第２接続孔で接続して設
け、弁本体の供給流路内に移動自在に設けて第１接続孔
を開閉する供給弁体と弁本体の排出流路内に移動自在に
設けて第２接続孔を開閉する排出弁体とを連結してそれ
ぞれ備えた２個の主弁を弁本体内に並列配設し、各主弁
は供給弁体で第１接続孔を閉じて供給流路を遮断し排出
弁体で第２接続孔を開いて負荷流路と排出流路を連通す
る第１位置と、供給弁体で第１接続孔を開いて供給流路
と負荷流路を連通し排出弁体で第２接続孔を閉じて排出
流路を遮断する第２位置とに移動自在に設け、各主弁の
排出弁体にはそれぞれ径方向に離した２個の作用面を有
するピストン部材を備え、各主弁のピストン部材背部に
は各作用面により区画形成したそれぞれ２個のパイロッ
ト室を径方向に離して並列配設し、供給流路の圧力流体
の一部をパイロット流体として主弁のパイロット室に導
入したり供給流路からのパイロット流体を遮断してパイ
ロット室内のパイロット流体を低圧側に導出したりする
２個のパイロット電磁弁を設け、２個のパイロット電磁
弁の一方を各主弁のそれぞれ１個のパイロット室に接続
すると共に、他方を各主弁のそれぞれ残りの１個のパイ
ロット室に接続し、パイロット室に導入したパイロット
流体が作用する主弁のピストン部材の各作用面は、２個
のパイロット室へのパイロット流体の導入により各主弁
を第２位置に移動すると共に、１個のパイロット室への
パイロット流体の導入では各主弁を第１位置に移動する
大きさに形成したことを特徴とする複合電磁切換弁。1. A valve body has a supply flow path for supplying a pressure fluid, a load flow path connected to a fluid actuator and axially separated from the supply flow path, and a discharge flow path connected to a low pressure side in a valve body, The supply flow path and the load flow path are connected by the first connection hole, and the load flow path and the discharge flow path are connected by the second connection hole, and are provided movably in the supply flow path of the valve body. The valve body includes two main valves, each of which is provided with a supply valve body that opens and closes the first connection hole and a discharge valve body that is movably provided in the discharge flow path of the valve body and that opens and closes the second connection hole. The main valves are arranged in parallel inside each other, and the supply valve body closes the first connection hole to block the supply flow passage, and the discharge valve body opens the second connection hole to connect the load flow passage and the discharge flow passage. 1st position, the second connection hole is opened by opening the first connection hole with the supply valve body to connect the supply flow path and the load flow path, and the second connection hole is closed with the discharge valve body The main body of each main valve is provided with a piston member having two working surfaces which are separated from each other in the radial direction, and the main valve is provided with a partition formed by each working surface on the back of the piston member. The two pilot chambers are arranged in parallel in a radial direction so that a part of the pressure fluid in the supply passage is introduced as pilot fluid into the pilot chamber of the main valve or the pilot fluid from the supply passage is shut off. Two pilot solenoid valves for leading the pilot fluid in the pilot chamber to the low pressure side are provided, and one of the two pilot solenoid valves is connected to one pilot chamber of each main valve and the other is connected to the other. Each working surface of the piston member of the main valve which is connected to the remaining one pilot chamber of the main valve and on which the pilot fluid introduced into the pilot chamber acts is The composite solenoid operated directional control valve is characterized in that each main valve is moved to the second position when turned on, and each main valve is moved to the first position when the pilot fluid is introduced into one pilot chamber. . 【請求項２】 各主弁に対し負荷流路と排出流路とを接
続する第２接続孔をそれぞれ２個径方向に離して並列配
設し、この２個の第２接続孔を各主弁にそれぞれ備えた
１個の排出弁体で開閉して設けたことを特徴とする請求
項１に記載した複合電磁切換弁。2. The main valve is provided with two second connection holes that connect the load flow path and the discharge flow path in parallel in a radial direction, and the two second connection holes are provided in each main valve. The composite electromagnetic switching valve according to claim 1, wherein the valve is opened and closed by one discharge valve element provided in each valve.