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JP3060063B2 |
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JP2000179271A |
To provide a pneumatic shock absorber for a drill column simple in structure, having a long service life and operational reliability.A pneumatic shock absorber for a drill column has a first connecting member connected to the rear of a d...
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JP3055072B2 |
PURPOSE:To reduce the sound propagation of high frequency to the surrounding by a percussion type drilling device which is excellent in sound-proofing performance. CONSTITUTION:The outside of a guide cell 22 of a device main body 7 of a ...
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JP3016179B2 |
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JPH11350861A |
To provide an impact rotary type ground hole drilling device having the universality of its system and transmitting an acceleration force of a vibration generation body to a shaft cylinder casing securely and divert it for use as a swing...
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JP2960945B2 |
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JP2958473B2 |
PURPOSE: To transmit rotation and impact energy to a ring bit via an inner bit to reduce energy loss of torque and impact force so as to enhance drilling capacity, reduce drilling resistance of an outer pipe, decrease deformation and dis...
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JPH11256970A |
To provide a technology for accurately smoothly carrying out a long and large bore drilling and excavating in a hard rock bed in a short term according to a design. In a case of excavating a fixed large bore and long drilled hole in a su...
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JP2936143B2 |
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JP2926838B2 |
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JP2919897B2 |
The device comprises a first chamber (5) which is connected to an accmulator (6) and the pressure of which is used to hold together a set of rods (2) forming part of the drill tool. Furthermore there is a second chamber (7) to damp the r...
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JP2915029B2 |
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JPH11173060A |
To improve a deaerating function by closing the tip of a pipe driven into the ground before a hardener is injected into the pipe and inserting a deaeration hose having an opening at the side into the pipe. An outer pipe having a specifie...
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JPH11173059A |
To make it easy to pull out and recover a drilling bit and a inner pipe rod when removing slime deposited in an outer pipe in the double pipe drilling method. In a drilling method, an inner pipe rod equipped with drilling bits and an out...
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JP2908378B2 |
There is provided a guided drilling system and an in-the-hole shock absorber adapted therein. The guided drilling system includes a drill string configured to continuously and accurately bore a hole into the ground without the need to pe...
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JPH11159272A |
To provide a rock drill simple in constitution with few restrictions on use (with wide application) and constituted in such a way that an impact unit automatically stops in the case of drill steel becoming unmovable since impact frequenc...
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JP2595043Y2 |
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JPH11107670A |
To reduce a percussion sound by screwing a plug member, to which an elastic material is fitted, to the percussed-side end section of a shank rod while the size of both members is specified. One end of a plug-shaped member 3 is screwed to...
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JP2882937B2 |
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JP2870943B2 |
The device comprises a set of rods comprising a number of rods (6) which are journalled in a surrounding set of tubes (7) by means of elastic bushings (52,53). One of the bushings is provided with a lip (54) which sealingly rests against...
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JP2870942B2 |
Device in impact machines. The device comprises a number of rods (6) provided with projections (51). The rods are journalled in a surrounding set of tubes (7) by means of elastic bushings (52,53) which are provided with grooves (57) thou...
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JPH1171984A |
To obtain a sound proof structure capable of being mounted and dismounted with ease, and also installed on a ready-made machine by closely fitting detachably a cylindrical vibration attenuating member comprising a high hysteresis elastic...
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JP2867232B2 |
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JP2859816B2 |
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JPH1122359A |
To prevent the generation of noise emitted from a drill rod without worsening workability by a method wherein a drill rod is separated away from a drill head and covered with a compact cover structure. This noise control equipment for an...
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JP2833641B2 |
PURPOSE: To apply fine vibration impact force, rotating force, and pressure advance force and perform an efficient excavation by transmitting the fine vibration by a hydraulic servo cylinder and the rotation by a hydraulic motor to an ex...
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JPH10311192A |
To make it possible to surely and easily carry out inspection work for an automatic drill without using any instruction book. An automatic drill is equipped with a detection device 18 for detecting a working condition of an operating sec...
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JPH10311193A |
To make it possible to control operation mechanism of a drill in succession. A drill controlling device is equipped with a detection device 18 for detecting an operation condition of an operation mechanism in a drill mounted on a guide s...
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JP2827020B2 |
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JP2816749B2 |
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JP2804906B2 |
To provide a crawler crane which can conduct a foundation piling construction method without using a leader, facilitate large-diameter excavation work, ensure a wide crane working range, and conduct safe work. At a crane machine 13 which...
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JPH10238272A |
To provide a rock drill which can give a great strike force to a shank rod to obtain high excavating function without making a piston larger. A rock drill is equipped with a shank rod 2 supported so as to be rotatable around an axis O an...
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JP2785421B2 |
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JP2784454B2 |
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JP2779690B2 |
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JPH1088954A |
To maintain the lifetime of products long, and while to lower the manufacturing cost by forming a device of a first member at the predetermined length which includes a female screw part, and other members which includes a male screw and ...
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JP2567334Y2 |
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JPH1082269A |
To make it possible to widen a preferable range in the case when a perforating apparatus is mounted on a construction vehicle, such as a hydraulic shovel. A top bracket 11 is turnable supported on the tip of an arm 1 of a hydraulic shove...
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JP2734271B2 |
PURPOSE: To enable a collet chuck for gripping a rod pierced therein to grip and release the grip rapidly with strong force in a through type striking hammer device. CONSTITUTION: In a collet chuck 5, a collet 25 is provided at the outer...
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JP2730253B2 |
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JPH1077777A |
To provide such a hammer sub for a rotary percussion drill and its manufacture as being capable of reducing its manufacturing cost while keeping ins longer life. A hammer sub has a screw portion 4 formed at the end, a first bearing porti...
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JPH1072994A |
To prevent idle hammering by feeding part of water, fed to a bit, to a void formed at a fit-in part of a head stem and a head sleeve. This boring tool is provided with a head stem supplied with impact and rotation by a machine drill, a h...
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JPH1036905A |
To improve the crushing efficiency of a rock drill and to extend the service life thereof by arranging a female screw part for fitting a drilling tool at the tip part of a shank rod. At the tip part of a blowing hole 12b arranged to a sh...
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JPH1037645A |
To provide a low noise type drill head to provide a sufficient soundproof effect without increasing the size of a machine and damaging ease of use. A drill head comprises a hammer sub-assembly 6 in a drill head case 1, and a hammer spool...
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JP2689240B2 |
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JP2680433B2 |
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JPH09273372A |
To provide an excavator, by which the accuracy of a direction change is improved by directly changing the direction in the excavation direction rapidly while a pipe diameter can be reduced. An air hammer 3 housed in a head excavation pip...
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JP2637586B2 |
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JP2632479B2 |
PURPOSE: To more easily and inexpensively assemble a drilling device by further simplifying the handling of a junction part. CONSTITUTION: A hole is drilled by a drilling rod consisting of a junction part 13 being driven by a rotary and/...
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JP2633215B2 |
PURPOSE: To easily and rapidly excavate a large diameter shaft, by fitting a plurality of drill units at the inside of a cylindrical drill system and excavating the peripheral edge at first to cut the inside and advancing while adding st...
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