JPH0288004U - - Google Patents
Info
- Publication number
- JPH0288004U JPH0288004U JP16673288U JP16673288U JPH0288004U JP H0288004 U JPH0288004 U JP H0288004U JP 16673288 U JP16673288 U JP 16673288U JP 16673288 U JP16673288 U JP 16673288U JP H0288004 U JPH0288004 U JP H0288004U
- Authority
- JP
- Japan
- Prior art keywords
- passage
- valve
- external signal
- working machine
- communication area
- 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.)
- Pending
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Description
第１図・第２図は本考案の実施例を示す断面図
、模式的説明図、第３図は従来例の断面図である
。
１１は操作弁、１４は作業機シリンダ、１４ａ
は下げ室、１４ｂは上げ室、１７は弁本体、２４
，２７は第１・第２絞り弁、３２はロツク弁。
1 and 2 are cross-sectional views and schematic explanatory views showing an embodiment of the present invention, and FIG. 3 is a cross-sectional view of a conventional example. 11 is an operation valve, 14 is a work machine cylinder, 14a
14b is the lowering chamber, 17 is the valve body, 24
, 27 are first and second throttle valves, and 32 is a lock valve.
Claims (1)
と、第２の通路を形成すると共に、第２の通路に
、第２の通路を外部信号で連通するロツク弁３２
と外部信号で連通面積を制御する第１絞り弁２４
を設け、前記第１の通路を作業機シリンダ１４の
上げ室１４ｂと操作弁１１に接続すると共に、第
２の通路を作業機シリンダ１４の上げ室１４ｂと
下げ室１４ａに連通し、前記第１の通路と第２通
路を、外部信号で連通面積が制御される第２絞り
弁２８で連通・遮断するようにしたことを特徴と
する急速降下弁。 A lock valve 32 forms a first passage including a check valve 51 and a second passage in the valve body 17, and communicates the second passage with an external signal.
and a first throttle valve 24 that controls the communication area by an external signal.
The first passage is connected to the raising chamber 14b of the working machine cylinder 14 and the operation valve 11, and the second passage is connected to the raising chamber 14b and the lowering chamber 14a of the working machine cylinder 14. A rapid drop valve characterized in that the passage and the second passage are communicated with each other by a second throttle valve 28 whose communication area is controlled by an external signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16673288U JPH0288004U (en) | 1988-12-26 | 1988-12-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16673288U JPH0288004U (en) | 1988-12-26 | 1988-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0288004U true JPH0288004U (en) | 1990-07-12 |
Family
ID=31454378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16673288U Pending JPH0288004U (en) | 1988-12-26 | 1988-12-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0288004U (en) |
-
1988
- 1988-12-26 JP JP16673288U patent/JPH0288004U/ja active Pending