JPS6065483U - counterbalance valve - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来例の断面図、第２図は本考案の実施例を示
す全体断面図、第３図は要部拡大断面図である。 １は弁本体、２□〜２４は第１〜第４ポート、９はスプ
ール、１１はバネ、２１は受圧室、２２は細孔。 第２図 、−ＩＬｌFIG. 1 is a sectional view of a conventional example, FIG. 2 is an overall sectional view showing an embodiment of the present invention, and FIG. 3 is an enlarged sectional view of a main part. 1 is a valve body, 2□ to 24 are first to fourth ports, 9 is a spool, 11 is a spring, 21 is a pressure receiving chamber, and 22 is a pore. Figure 2, -ILl

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 弁本体１に、第１〜第４ポート２１〜２．及び第１、第
“３ポート２１，２３を断連するスプール９並びに第１
、第３ポート２□、２３を短絡しかつ第３ポート２３か
ら第１ポート２１への流通を阻止する逆止弁７を有する
短絡路６を設け、前記スプール９を第１、第３ポート２
１，２３を遮断する位置に保持するバネ１１を設けると
共に、そのバネ力に抗する押力をスプール９に与える受
圧室２１を形成し、この受圧室２１を第２ポート２□よ
り受圧室２１への流路を阻止する逆止弁２０を介して第
２ポート２□に連通し、かつ前記スプール９に形成した
細孔２２を介して第２ポート２゜に開口させたことを特
徴とするカウンタバランス弁。The valve body 1 has first to fourth ports 21 to 2. and the spool 9 that disconnects the first and third ports 21 and 23, and the first
, a short-circuit path 6 having a check valve 7 that short-circuits the third ports 2□, 23 and blocks flow from the third port 23 to the first port 21 is provided, and the spool 9 is connected to the first and third ports 2
1 and 23 are provided, and a pressure receiving chamber 21 is formed that applies a pushing force to the spool 9 that resists the spring force. It is characterized in that it communicates with the second port 2□ through a check valve 20 that blocks the flow path to the spool 9, and opens to the second port 2° through a pore 22 formed in the spool 9. counterbalance valve.