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JP4649518B2 |
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JP4633454B2 |
To provide an excavator improving a drainage efficiency and enhancing an excavation efficiency as the result of an improvement in the drainage efficiency because the suction head of a drainage pump draining water (slurry) in an excavated...
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JP2011026887A |
To provide a working machine for pulling out a pile, which enables assembling operations for a casing etc. to be easily performed even on a narrow site, because it can perform not only a pull-up operation but also a push-in one.In this w...
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JP2011021374A |
To form a straight excavated hole in ground by preventing a deviation of a load and a deflection of a main shaft of excavation during the excavation of the ground.In an excavating tool 13, a casing 10 is externally fitted and mounted on ...
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JP4624285B2 |
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JP4612937B2 |
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JP4604061B2 |
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JP4576085B2 |
A method and device for controlling a rock drilling machine (51) includes an impact device (5) arranged to act on a drilling tool (52), a rotation motor (7) for rotating the drilling tool (52), and a feed motor (6) for feeding the drilli...
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JP4566805B2 |
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JP4565709B2 |
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JP4551601B2 |
A rock drilling machine comprising a rotating device (1), a percussion device (2) and a shank (17) where a tool (18) is to be fastened. According to the inventive idea, lubricant used for lubricating the shank is supplied in suitable con...
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JP4505479B2 |
Drilling device comprises a pipe hopper (30) arranged above a drill drive unit (11) and a drill pipe (6) detachedly connected to a drive shaft (19) of the drill drive unit below the drill drive unit. An independent claim is also included...
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JP4486436B2 |
A restraining arrangement (48) for limiting the separation of a feed table (36) having a pivot pin (106) and a positioner block (30) of a mobile track drill. The restraining arrangement includes a first constraint device (114) positioned...
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JP4485098B2 |
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JP4472204B2 |
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JP2010119290A |
To solve the problem that a counter-electromotive force is generated in a motor winding of a general-purpose motor by a slip of a motor and a backlash of a drive unit (gear) even if output frequencies of each inverter of a plurality of g...
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JP4453883B2 |
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JP2010084341A |
To provide a drilling unit capable of reducing the weight of a drill pipe without deteriorating drilling capability, and the drill pipe for the drilling unit.This drilling unit (10) includes a drill body (1). The drill body (1) is held i...
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JP4448608B2 |
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JP2010070969A |
To provide a civil engineering excavation device enabling a boring bit installation operation and a drilling rod joining operation to be efficiently and safely performed.A hole allowing a boring bit to extend therethrough is opened in th...
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JP4425290B2 |
Drilling device comprises a pipe hopper (30) which can be axially displaced with a drill pipe (6) opposite a carriage (22). An independent claim is also included for a method for producing a drilling column in the ground using the above ...
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JP2009299356A |
To provide a kelly-bar structure capable of supplying a filler such as a cement milk in an earth drilling machine having a telescopic kelly-bar.This kelly-bar of an earth drilling machine includes an outer kelly-bar 15; a guide pipe 16 c...
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JP2009191492A |
To provide road surface drilling equipment and a road surface drilling method, which enable the easy drilling of a hole capable of being controlled to a desired depth and excellent in reproducibility, which can inhibit dust, produced by ...
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JP4308410B2 |
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JP2009138379A |
To provide an existing pipe renewing method which is not a great hindrance to traffic on the ground and which enables the efficient execution of work.In this existing pipe renewing method, holes are excavated in positions corresponding t...
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JP3150680U |
To provide an auger drive device capable of performing various pile driving methods by rotating an earth auger and a steel pipe with a common hydraulic motor. An auger mounting shaft 12 and a circle gear 11 arranged coaxially with the au...
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JP2009114744A |
To provide an auger device for excavating a ditch by which the ditch can be efficiently excavated using an auger.An auger screw 8 and a rotary casing 9 externally fitted to it are hangingly connected to a rotary drive part 7 of an auger ...
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JP4224596B2 |
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JP2009013693A |
To provide a hydraulic circuit which can switch a speed for rotating a rotational mechanism in multiple stages, and achieves the switching at a low cost.The hydraulic circuit is provided with hydraulic motors operable by pressure oil sup...
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JP4197385B2 |
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JP2008267129A |
To provide a boring drill for quickly discharging waste, after boring.A power motor is combined with a screw shaft 2 and a drill head axis shaft 1 and is constituted by coupling this combination with a frame by a fixing plate 21. The axi...
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JP2008255765A |
To solve the problem that a pile hole is obliquely formed because a presently mainstream pile hole drilling unit employing a hydraulic motor as a driving source cannot detect a precise N-value in real time during ground drilling operatio...
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JP4171161B2 |
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JP2008208599A |
To provide an auger device capable of preventing a following auger device from colliding against a core member of a preceding element and not only reducing vibration and noise but also improving efficiency of excavation and precision of ...
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JP4134288B2 |
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JP2008174981A |
To provide a column building-up device and a column building-up method, easy in construction, by preventing rotation of a column to the ground surface.This column building-up device 1 has two excavation rods 26 and 27 in parallel, and is...
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JP4121715B2 |
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JP3143134U |
To provide a hydraulic drilling device for mounting a power excavator which is safe and has high work efficiency. A hydraulic motor for rotating a drilling machine for rotating a drilling machine having a cylindrical drilling blade porti...
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JP4106304B2 |
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JP2008138398A |
To provide a method for carrying out heat pipe snow-melting at a low cost.This heat pipe snow-melting method utilizing ground heat obtained through a heat pipe 1 buried underground comprises steps for burying an excavating body A with an...
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JP2008517779A |
The invention relates to a drill bushing for engagement with a drilling steel, wherein said drill bushing ( 2 ) has contact surfaces ( 4 ) for contact with a drilling steel ( 1 ), said contact surfaces ( 4 ) having interior, inwards curv...
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JP2008095276A |
To secure the quality of a continuous underground wall by eliminating a discontinuous portion when the continuous underground wall is formed and suppress the cost by eliminating the need of additional works by providing an excavator capa...
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JP4061874B2 |
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JP4049015B2 |
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JP4046851B2 |
A new masonry drill has a shaft (2) with clearing spirals (3), the tip (5) being entirely in hard material, bonded to the end face of the shaft. It comprises a main- (6) and auxiliary cutters (7, 8) each located along diagonals of the dr...
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JP4035433B2 |
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JP4034196B2 |
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JP4015083B2 |
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JP2007291693A |
To provide a rock bit apparatus with a striking mechanism, which has a compressed air feeding line and a second fluid pressure feeding line. The rock bit apparatus with the striking mechanism has arranged therein the compressed air feedi...
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JP2007291807A |
To provide a foundation machine and a method for attaching and removing shaft bodies capable of lengthening shaft bodies by addition or their removal at a working place above which obstacles are present and efficiently performing work su...
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