JPH0167304U - - Google Patents
Info
- Publication number
- JPH0167304U JPH0167304U JP1987163450U JP16345087U JPH0167304U JP H0167304 U JPH0167304 U JP H0167304U JP 1987163450 U JP1987163450 U JP 1987163450U JP 16345087 U JP16345087 U JP 16345087U JP H0167304 U JPH0167304 U JP H0167304U
- Authority
- JP
- Japan
- Prior art keywords
- flow path
- return
- spool
- check valve
- path
- 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
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Forklifts And Lifting Vehicles (AREA)
- Fluid-Pressure Circuits (AREA)
Description
図面第１〜３図はこの考案の実施例を示すもの
で、第１図は断面図、第２図は回路図、第３図は
メータリング特性図、第４〜６図は従来装置を示
すもので、第４図は断面図、第５図は回路図、第
６図はメータリング特性図である。
Ｓ……リフトシリンダ、１……スプール弁、１
ａ……スプール、７……戻り通路、８……オペレ
ートチエツク弁、１５……第１流路、１８……第
２流路。
Figures 1 to 3 show an embodiment of this invention; Figure 1 is a sectional view, Figure 2 is a circuit diagram, Figure 3 is a metering characteristic diagram, and Figures 4 to 6 are conventional devices. 4 is a sectional view, FIG. 5 is a circuit diagram, and FIG. 6 is a metering characteristic diagram. S...Lift cylinder, 1...Spool valve, 1
a... Spool, 7... Return path, 8... Operate check valve, 15... First flow path, 18... Second flow path.
補正 昭６３．６．２８
実用新案登録請求の範囲を次のように補正する
。Amendment June 28, 1983 The scope of claims for utility model registration is amended as follows.
【実用新案登録請求の範囲】
リフトシリンダへの流通のみを許容するオペレ
ートチエツク弁を内装したスプール弁のスプール
に、オペレートチエツク弁に初期リイフトを与え
るための流路を形成する第１流路と、この初期リ
フトを付与されて開いたオペレートチエツク弁か
ら戻り通路へ流路を形成する第２流路とを設けて
なる制御装置において、閉状態にあるときの戻り
通路に対する第１流路のラツプ長よりも、同じく
戻り通路に対する第２流路のラツプ長を長くし、
第１流路が戻り通路に連通した後に第２流路が当
該戻り通路に連通する構成にしたシリンダの制御
装置。[Scope of Claim for Utility Model Registration] A spool of a spool valve incorporating an operating check valve that allows flow only to the lift cylinder, a first flow path forming a flow path for giving an initial lift to the operating check valve; In a control device that is provided with a second flow path forming a flow path from the operated check valve opened by applying this initial lift to the return path, the wrap length of the first flow path with respect to the return path when in the closed state. Similarly, the wrap length of the second flow path with respect to the return path is increased,
A cylinder control device configured such that, after the first flow path communicates with the return passage, the second flow passage communicates with the return passage.
Claims (1)
ートチエツク弁を内装したスプール弁のスプール
に、オペレートチエツク弁に初期リフトを与える
ための流路を形成させる第１流路と、この初期リ
フトを付与されて開いたオペレートチエツク弁か
ら戻り通路へ流路を形成させる第２流路とを設け
てなる制御装置において、スプールの第１流路お
よび第２流路の各戻り通路ポートに対するそれぞ
れのオーバラツプ量を異にし、第２流路のオーバ
ラツプ量を第１流路のオーバラツプ量より、十分
に大きく形成し、第１流路による戻り流路の形成
から十分におくれて第２流路の戻り流路が形成さ
れるように構成したシリンダの制御装置。 The spool of the spool valve, which is equipped with an operating check valve that allows flow only to the lift cylinder, has a first flow path that forms a flow path for giving an initial lift to the operating check valve, and a first flow path that is opened when this initial lift is applied. and a second flow path for forming a flow path from the operated check valve to the return path, the first flow path and the second flow path of the spool having different overlap amounts for each return path port. , the overlap amount of the second flow path is formed to be sufficiently larger than the overlap amount of the first flow path, and the return flow path of the second flow path is formed sufficiently after the formation of the return flow path by the first flow path. A cylinder control device configured to
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987163450U JPH088321Y2 (en) | 1987-10-26 | 1987-10-26 | Cylinder control device |
| US07/499,031 US5048395A (en) | 1987-07-07 | 1990-03-26 | Control device for cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987163450U JPH088321Y2 (en) | 1987-10-26 | 1987-10-26 | Cylinder control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0167304U true JPH0167304U (en) | 1989-04-28 |
| JPH088321Y2 JPH088321Y2 (en) | 1996-03-06 |
Family
ID=31448180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987163450U Expired - Lifetime JPH088321Y2 (en) | 1987-07-07 | 1987-10-26 | Cylinder control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH088321Y2 (en) |
-
1987
- 1987-10-26 JP JP1987163450U patent/JPH088321Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH088321Y2 (en) | 1996-03-06 |
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