JPH0347101U - - Google Patents

Info

Publication number
JPH0347101U
JPH0347101U JP10776289U JP10776289U JPH0347101U JP H0347101 U JPH0347101 U JP H0347101U JP 10776289 U JP10776289 U JP 10776289U JP 10776289 U JP10776289 U JP 10776289U JP H0347101 U JPH0347101 U JP H0347101U
Authority
JP
Japan
Prior art keywords
saw
feed
switching valve
grapple
oil
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
Application number
JP10776289U
Other languages
Japanese (ja)
Other versions
JPH0745284Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP10776289U priority Critical patent/JPH0745284Y2/en
Publication of JPH0347101U publication Critical patent/JPH0347101U/ja
Application granted granted Critical
Publication of JPH0745284Y2 publication Critical patent/JPH0745284Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

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

第１図はこの考案にかかるグラツプルソーの油
圧回路図、第２図は作業アタツチメント先端部に
装着したグラツプルソーを示す図、第３図はグラ
ツプルソーのチエンソー装置の要部斜視図、第４
図はグラツプルソーの従来技術油圧回路図である
。 １……グラツプルソー、５……チエンソー部、
７……油圧モータ、８……ソーフイードシリンダ
、９……アキユムレータ、１５……ロツド側油室
、１６……ヘツド側油室、１７……フイード用パ
イロツト切換弁、１９……電磁切換弁、２１……
パイロツト圧用油圧源、２７……切下げスイツチ
、３７，２２……チエツク弁。 Fig. 1 is a hydraulic circuit diagram of the grapple saw according to this invention, Fig. 2 is a diagram showing the grapple saw attached to the tip of the working attachment, Fig. 3 is a perspective view of the main parts of the chain saw device of the grapple saw, and Fig. 4
The figure is a conventional hydraulic circuit diagram of a grapple saw. 1... grapple saw, 5... chain saw section,
7...Hydraulic motor, 8...Saw feed cylinder, 9...Accumulator, 15...Rod side oil chamber, 16...Head side oil chamber, 17...Pilot switching valve for feed, 19...Solenoid switching valve, 21...
Hydraulic source for pilot pressure, 27... cut-down switch, 37, 22... check valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 作業車両の作業アタツチメント先端部にグラツ
プルソーを取付け、そのグラツプルソーのチエン
ソー部を油圧モータにて回転駆動可能とし、その
油圧モータ下流側を一方はフイード用パイロツト
切換弁を介してソーフイードシリンダ内ロツド側
油室と連通せしめ、他方は油圧モータ下流側より
分岐して絞り部などを経て油タンクに連通するよ
うにし、上記フイード用パイロツト切換弁にパイ
ロツト圧を作用させないときチエンソー部の切上
げ戻し作動を行うようにしたグラツプルソーにお
いて、上記フイード用パイロツト切換弁とソーフ
イードシリンダ内ロツド側油室とを連通する油路
と、フイード用パイロツト切換弁のパイロツト回
路とをチエツク弁を介して連通し、チエンソー部
の切上げ戻し操作を行つたときソーフイードシリ
ンダ内ロツド側油室からの戻り油を上記チエツク
弁を介して油タンクに戻すように構成したことを
特徴とするグラツプルソーの油圧回路。 A grapple saw is attached to the tip of the work attachment of the work vehicle, and the chain saw part of the grapple saw can be driven to rotate by a hydraulic motor, and the downstream side of the hydraulic motor is connected to the rod side oil in the saw feed cylinder via the feed pilot switching valve. The other is connected to the oil tank by branching from the downstream side of the hydraulic motor and communicating with the oil tank through a throttle section, etc., so that when no pilot pressure is applied to the feed pilot switching valve, the chain saw part is cut up and returned. In this grapple saw, the oil passage that communicates the feed pilot switching valve and the rod side oil chamber in the saw feed cylinder is communicated with the pilot circuit of the feed pilot switching valve via a check valve, and the chain saw section is cut up. A hydraulic circuit for a grapple saw, characterized in that when a return operation is performed, return oil from the rod side oil chamber in the saw feed cylinder is returned to the oil tank via the check valve.
JP10776289U 1989-09-14 1989-09-14 Grapple saw hydraulic circuit Expired - Lifetime JPH0745284Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10776289U JPH0745284Y2 (en) 1989-09-14 1989-09-14 Grapple saw hydraulic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10776289U JPH0745284Y2 (en) 1989-09-14 1989-09-14 Grapple saw hydraulic circuit

Publications (2)

Publication Number Publication Date
JPH0347101U true JPH0347101U (en) 1991-05-01
JPH0745284Y2 JPH0745284Y2 (en) 1995-10-18

Family

ID=31656440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10776289U Expired - Lifetime JPH0745284Y2 (en) 1989-09-14 1989-09-14 Grapple saw hydraulic circuit

Country Status (1)

Country Link
JP (1) JPH0745284Y2 (en)

Also Published As

Publication number Publication date
JPH0745284Y2 (en) 1995-10-18

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term