JPS56150215A - Oil-pressure hammer - Google Patents

Oil-pressure hammer

Info

Publication number
JPS56150215A
JPS56150215A JP5173180A JP5173180A JPS56150215A JP S56150215 A JPS56150215 A JP S56150215A JP 5173180 A JP5173180 A JP 5173180A JP 5173180 A JP5173180 A JP 5173180A JP S56150215 A JPS56150215 A JP S56150215A
Authority
JP
Japan
Prior art keywords
oil
piston
inlet
sent
goes
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
Application number
JP5173180A
Other languages
Japanese (ja)
Inventor
Tadahiko Miura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Priority to JP5173180A priority Critical patent/JPS56150215A/en
Publication of JPS56150215A publication Critical patent/JPS56150215A/en
Pending legal-status Critical Current

Links

Landscapes

  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

PURPOSE: To reduce resistance to a piston rod and increase the striking force against a pile of an oil-pressure hammer by providing an automatic valve taking charge of the action of a three-way valve for rapidly discharging oil filled up in a space on the piston rod side during the falling of the weight of an oil-pressure hammer.
CONSTITUTION: When a switch valve 24 is switched, oil from an oil-pressure pump is sent automatically to the inlet of an automatic valve 17. The oil moves a spool, closes an outlet, opens the inlet, and then goes into the lower part of a cylinder 6, whereby a piston is raised and a weight 9 is also raised. Then, air in the upper part of the cylinder is compressed and sent into an air chamber 13. Part of the compressed air is sent with oil into an oil trap 18 through a small pipe 20. When the switch valve 24 is restored, the pressure falls, the piston goes down, and the oil pushes back the spool, closes the inlet, opens the outlet, and then goes into the oil trap 18. At that time, the compressed air in the air chamber 13 pushes the piston to accelerate its lowering speed.
COPYRIGHT: (C)1981,JPO&Japio
JP5173180A 1980-04-21 1980-04-21 Oil-pressure hammer Pending JPS56150215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5173180A JPS56150215A (en) 1980-04-21 1980-04-21 Oil-pressure hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5173180A JPS56150215A (en) 1980-04-21 1980-04-21 Oil-pressure hammer

Publications (1)

Publication Number Publication Date
JPS56150215A true JPS56150215A (en) 1981-11-20

Family

ID=12895034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5173180A Pending JPS56150215A (en) 1980-04-21 1980-04-21 Oil-pressure hammer

Country Status (1)

Country Link
JP (1) JPS56150215A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59102016A (en) * 1982-11-30 1984-06-12 Takashi Takee Oil-pressure drop hammer for driving pile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59102016A (en) * 1982-11-30 1984-06-12 Takashi Takee Oil-pressure drop hammer for driving pile
JPS6329051B2 (en) * 1982-11-30 1988-06-10 Takashi Takee

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