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JP2001098870A |
To provide method for determining a non-circular figure for excavating a hole having a regular polygonal cross section, without marring the advantage of rotary movement. There is provided a method for excavating a hole H, in a shape of a...
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JP3151608B2 |
To synchronously turn an auger driving device and a lower swing preventive device by hydraulic circuits having the simple constitution. An auger driving device arranged in a leader of a pile driver so as to be ascendable/descendable, is ...
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JP2001083224A |
To accurately measure a magnetic flux density even during rotating. The apparatus for measuring a magnetic field comprises a three-axis magnetic sensor TMM having sensitivity axes in directions x, y and z, a two-axis acceleration sensor ...
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JP2001073661A |
To provide an earth auger capable of performing efficient excavation according to various types of ground conditions without causing power loss and lowering excavating speed. This earth auger 1 is formed so that an excavating head 8 with...
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JP3127307B2 |
PURPOSE: To avoid the jamming of a double pipe, and to enable the boring of a long hole even in any condition of the ground by using a device that is made up of a center-hole drifter or the like, when boring is carried out by giving a ro...
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JP2001012178A |
To provide an electric earth auger capable of eliminating a power generation device mounted in a rear part of a base machine and driving a power generator by an engine of the base machine.In an electric earth auger in which a leader erec...
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JP2001011855A |
To provide pile installation by inner excavator capable of synchronizing with expansion control of a forced cylinder to drive a risng and falling hydraulic motor and making simply earth-moving operaion.An auger driving device 10 for driv...
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JP3119467B2 |
PURPOSE: To eliminate loss of soil discharge quantity due to reverse rotation of a screw in the case of carrying out foundation improvement by way of injecting a solidifying agent and to certainly carry out soil discharge in required qua...
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JP2000320281A |
To transmit a torque of a single auger to an output coupling to obtain a reverse torque against the output coupling from a reversal output coupling by connecting the input coupling of an output changeover device to the output coupling of...
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JP2000265770A |
To provide accurate synchronous rotation by connecting hydraulic motors in series and compensating internal leakage through a refilling circuit and also to enable switching over an arbitrary hydraulic motor easily to an independent drive...
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JP2000265769A |
To eliminate the fluctuation of the number of revolution of respective ahydraulic motors due to oil leakage brought when a plurality of hydraulic motors are connected by transmission means to give an interlocking mition and connected in ...
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JP3088097B2 |
The method includes the step of causing a specially-configured drill bit (102) at one end of a drill string (104) to intermittently rotate as it digs in, stops rotation until the rock fractures, and then moves after fracture in a random,...
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JP2000220372A |
To provide a reverse-type shaft-excavating machine having a means which prevents drill pipe or the like from being clogged with gravels and prevents the working efficiency from decreasing. A control part 15 preventing gravels from passin...
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JP2000204877A |
To provide a method of placing a reinforcement into a soil mortar forepoling capable of rapidly placing the core material in tunneling. A method of placing a reinforcement into a soil mortar forepoling comprises a preparation work stage ...
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JP3067236B2 |
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JP3066772B2 |
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JP3067237B2 |
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JP3067627B2 |
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JP3064460B2 |
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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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JP3050523B2 |
To provide a device for sufficiently removing a rotational reaction force even through the ground is weak. Reaction force removing members 64, 66 are coupled to opposite sides of a tubing device for pushing and rotating a casing tube so ...
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JP2000154691A |
To provide a hard-rock layer excavator capable of excavating a hard rock layer by a simple facility.The hard-rock layer excavator has a roll-drive mechanism having a kelly-bar 10 inserted into a pit hole excavated up to a hard rock layer...
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JP3049177B2 |
PURPOSE: To avoid the defect of possibility that turning moment is increased suddenly by the sudden lowering of the number of revolution of a drill and the gluing of the drill when the drill collides with a resistor in a bored hole, and ...
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JP3046249B2 |
To permit an unmanned operation in a vertical hole by mechanizing the work of drilling a noncircular vertical hole. Moving rails 7 are laid parallel to each other over a drilling range where a vertical hole is to be drilled, a gate-shape...
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JP2000145347A |
To provide a guide device for preventing the bending of kelly-bar of earth drill, which has a simple construction and is low in cost. A reel table is attached to the lower part of a kelley drive device 5 through a center joint 9. A joint...
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JP2604528Y2 |
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JP2000120363A |
To smoothly perform supplementary lifting work following excavating work, accurately and safely execute excavation by sufficiently supporting reaction force of excavation, and simplify a structure.Each base end of a front frame 38, a der...
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JP2000096971A |
To make the structure compact and lightweight and to improve workability in installation and operability in execution of excavation work for an apparatus and a method for excavating vertical shaft.With the present vertical shaft excavati...
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JP3027135B2 |
To ensure the excavating stroke in a low space area by supporting an auger in such a manner as to be capable of being positioned in vertically different positions to a rotation driving means. In excavation, an auger driving device 14 is ...
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JP3022314B2 |
To facilitate assembly by connecting two auger drive mechanisms in parallel by an upper connecting member and a lower connecting member and installing a lock pin controlling the revolution of the upper connecting member and a control lev...
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JP3019110B2 |
PCT No. PCT/FR91/00812 Sec. 371 Date Aug. 7, 1992 Sec. 102(e) Date Aug. 7, 1992 PCT Filed Oct. 17, 1991 PCT Pub. No. WO92/07162 PCT Pub. Date Apr. 30, 1992.A motorised rotary swivel for driving drill pipe in rotation is disclosed. The sw...
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JP2000064755A |
To provide an excavating bucket drive equipment capable of performing an optimum control for a drive torque acting on a hydraulic motor with a simple circuit configuration. In a drive circuit of a hydraulic motor 2, provided are an elect...
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JP3012900B2 |
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JP2000038890A |
To fix, in a boom type earth drill mounted on a crawler crane, a rotary frame carrying a rotary table for driving a kelly-bar and a front frame in such a manner that both the frames can be fixed at any angles, that is within any work rad...
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JP3004133B2 |
PURPOSE: To decrease the number of extension, and to improve workability by installing driving gears simultaneously giving revolving torque and thrust to the lower sections of a pair of posts disposed in upright into the working tunnel o...
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JP2000017979A |
To easily and rapidly drill a plurality of holes. This drilling machine includes a first slide table 3 supported by a support frame 2, a drill head 5 mounted on the first slide table 3 to impart a drilling force to a drill rod 7, a secon...
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JP2000017980A |
To facilitate disassembly and assembly without any deterioration in boring performance so as to improve portability by comprising freely attachable/detachable skid units, which can be freely attached/detached to/from specific end parts o...
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JP2999717B2 |
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JP2999711B2 |
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JP2000008754A |
To provide a high torque in a wide rotation speed range by changing a pole based on a frequency in an intersection point of the maximum output torques of respective poles according to frequencies in driving an inverter of a pole-change e...
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JP2993763B2 |
Drilling equipment including apparatus for laterally moving a direct drive drilling (12) unit to a position offset from the centerline (34) of a well. The drilling equipment includes a traveling block (24) suspended for generally vertica...
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JPH11343787A |
To provide the supplement rod of a high service life with good heat conduction efficiency by integrally providing a screw cylindrical part making an outside diameter equal to an intermediate part and cutting a female screw on an inner fa...
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JP2989350B2 |
PURPOSE: To provide a shaft sinking machine capable of obtaining sufficient directional corrective force in addition to be capable of performing earth cutting in a manner, while it is only enough to set the extent of strength in a drill ...
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JP2983001B2 |
PURPOSE: To improve safety and securely transmit a driving power, by fitting a plurality of power transmission members provided in the inside of a power transmission pipe of an excavating machine and pads provided in the outer periphery ...
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JP2981164B2 |
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JP2974881B2 |
PURPOSE: To surely perform a chucking action by rotating a chuck body at a large stroke into uniform contact with the outer periphery of a rotary shaft without enlarging a chuck mechanism. CONSTITUTION: A static chuck mechanism 13 is sup...
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JP2974670B1 |
[wrap up] [Task] To facilitate the introduction of earth and sand into the casing pipe when excavating a well with a relatively large diameter. A plurality of wings (30) are provided on the rotating casing pipe (2), and the lower surface...
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JP2972853B2 |
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JPH11294062A |
To enhance excavating force by generating a crack in rock-bed by a laser beam, by installing an excavating blade in the tip part, and irradiating the laser beam forward more than the excavating blade by rotating the excavating blade. A t...
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JP2967924B2 |
The method includes the step of causing a specially-configured drill bit (102) at one end of a drill string (104) to intermittently rotate as it digs in, stops rotation until the rock fractures, and then moves after fracture in a random,...
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