JPS5980535U

JPS5980535U - drop hammer

Info

Publication number: JPS5980535U
Application number: JP17361782U
Authority: JP
Inventors: 和幸吉田; 宮代　潤一
Original assignee: 三和機材株式会社
Priority date: 1982-11-18
Filing date: 1982-11-18
Publication date: 1984-05-31

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

[Brief explanation of the drawing]

第１図は本考案によるドロップハンマーの一実施例を示
す縦断正面図、第２図は第１図■−■線相当部分の拡大
断面図である。１・・・ドロップハンマー、２・・・機枠、３・・・ア
ンビル、４・・・油圧シリンダ、５・・・ロッド、６・
・・ハンマー、７・・・遮音壁、８・・・内殻筒、１０
・・・多孔板、１２・・・外殻筒、１４・・・気密室、
１５・・・吸音材、１６．１７・・・空気孔。FIG. 1 is a longitudinal sectional front view showing an embodiment of a drop hammer according to the present invention, and FIG. 2 is an enlarged sectional view of a portion corresponding to the line 1--2 in FIG. DESCRIPTION OF SYMBOLS 1... Drop hammer, 2... Machine frame, 3... Anvil, 4... Hydraulic cylinder, 5... Rod, 6...
... Hammer, 7 ... Sound insulation wall, 8 ... Inner shell cylinder, 10
... Perforated plate, 12 ... Outer shell cylinder, 14 ... Airtight chamber,
15...Sound absorbing material, 16.17...Air hole.

Claims

[Scope of utility model registration request]

In a device that moves a hammer up and down along a machine frame and hits a pile or the like by falling the hammer, the machine frame containing the hammer is connected to an inner shell cylinder having an inner diameter as close to the hammer as possible, and a machine frame containing the hammer. It is composed of a perforated plate provided at a distance on the outer periphery of an inner shell cylinder, and an outer shell cylinder fitted on the outer periphery of the perforated plate at a distance, and a material such as glass wool is placed between the perforated plate and the outer shell cylinder. A sound-absorbing material is filled and an airtight chamber is formed between the inner shell tube and the perforated plate, and air holes communicating with the airtight chamber are opened at the top and bottom of the inner shell tube to reduce the pressure generated by the hammer falling. A drop hammer characterized in that air is released into the machine frame at the upper part of the hammer through the lower air hole, the airtight chamber, and the upper air hole.