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1. 发明专利

JPH09250285A EXCAVATION ROD HOLDING DEVICE 失效
公开(公告)号：JPH09250285A
公开(公告)日：1997-09-22
申请号：JP8585496
申请日：1996-03-14
申请人： KOKEN BORING MACHINE CO
发明人： SATO TADASHI , DAIHISA YASUAKI , YAMAMOTO SEI
IPC分类号： E21B19/06
摘要： PROBLEM TO BE SOLVED: To surely and smoothly perform return operation of a clamp arm for holding an excavation rod without using a reaction force of a spring. SOLUTION: An excavation rod holding device is provided with a hydraulic cylinder 2 fixed to a support member 1, an arm 3 which is attached to the hydraulic cylinder so as to be freely reciprocated and has the first chuck piece 6 in its tip, a pair of rotational arms 7 whose each one end is rotatably pivoted to the arm 3, and a pair of clamp arms 10 which are rotatably supported on a support member 1 about support shaft parts 8, 9 and have the second chuck piece 11 in one of a position opposed to the first chuck piece 6. Respective other ends of the clamp arms 10 and the other ends of respective rotational arms 7 are rotatably pivoted by a pivot part 12.

4. 发明专利

JP2001152772A ROTATION TRANSMISSION MECHANISM IN DRILL HEAD FOR ROTARY PERCUSSION DRILL 失效
公开(公告)号：JP2001152772A
公开(公告)日：2001-06-05
申请号：JP33533399
申请日：1999-11-26
申请人： KOKEN BORING MACHINE CO
发明人： SATO TADASHI
IPC分类号： E21B6/02 , E21B6/00
摘要： PROBLEM TO BE SOLVED: To provide a rotation structure capable of reducing the wear of a spindle gear and serving semipermanently without turning it into consumables. SOLUTION: In this drill head for rotary percussion drill provided with a hammersub 2 transmitting a rotation force and a hitting force to a drill rod and a spindle gear 1 fitted in outer periphery of the hammersub 2 slidably to transmit a rotation force to the hammersub, a plurality of pins 16 for transmitting a rotation force between the hammersub 2 and a spindle 1 are provided at an interval in the peripheral direction.

5. 发明专利

JPH08311870A NOISE REDUCTION TYPE DRILL HEAD 失效
公开(公告)号：JPH08311870A
公开(公告)日：1996-11-26
申请号：JP14140495
申请日：1995-05-17
申请人： KOKEN BORING MACHINE CO
发明人： SATO TADASHI
IPC分类号： E02D7/08 , E02D13/00
摘要： PURPOSE: To prevent noise produced from a drill head by connecting a rod to the tip of a hammer, providing an oblong hole in each shaft center of a hammer rubber substitute struck by the hammer, press-fitting a liner as a vibration-proof material in the oblong hole. CONSTITUTION: The tip of a hammer 13 is inserted until it comes into contact with the upper end of a hammer rubber substitute. Pressure oil supplied to a hose adapter 11a from a pressure oil source through a hose or the like is fed into a cylinder body 12 through a distributor valve 11 to reciprocate the hammer 13. The tip of the hammer 13 continuously strikes a hammer rubber substitute. Simultaneously, the hammer rubber substitute is rotated by an oil motor to strike while rotating. A first liner 13b made of nonferrous metal is press-fitted as a vibration-proof material in an oblong hole 13a provided in the shaft center of the hammer 13. Whereupon, as materials with different frequencies are closely combined, they cancel each other to lower the magnitude of noise. Thus, the effect of noise prevention can be increased in a simple structure.

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