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JP2813133B2 |
PURPOSE: To prevent concrete milk, etc., adhered to a rod from being splashed. CONSTITUTION: A swing stop mechanism 18 which is installed on a leader located on the underside of a rotating drive mechanism to rotate a rod 14 at the tip of...
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JPH10280852A |
To obtain an auger driving device by which large turning force can be transmitted. A chuck mechanism 72 for grasping an auger drill is formed by a wedge member 54 inserted between an inclined surface 52 formed on a ring member 50 integra...
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JP2809559B2 |
PURPOSE: To form a continuous wall having excellent linearity by installing a guide shaft to one side on a line of an excavator provided with a plurality of excavation shafts whose shaft core is laid out on the line. CONSTITUTION: A plur...
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JP2806922B1 |
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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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JPH10252371A |
To easily insert a screw into a hollow bore by a method wherein rolling rollers, each slightly projecting beyond the outer diameter of the screw, are provided at a spiral blade at the end of the screw, and the rolling rollers are brought...
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JPH10252368A |
To contrive not to interrupt a work for fixing a rod, and to prevent the danger of falling of the rod by installing two rod fixing means for a boring machine and automatically fixing and operating the rod fixing means alternately by a co...
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JP2796615B2 |
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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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JPH10238263A |
To provide an elevating device with a frame can be simply attached to a guide rail. A sheave block 42 by which a suspended sheave 20 is rotatably supported is removably coupled to a coupling link member 36 rotatably supported to a frame ...
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JPH10238262A |
To provide an elevating device with which a frame can simply be attached to a guide rail. A sheave block 42 to which a suspended sheave 20 is removably attached to a link member 36 rotatably supported by a frame 10 and integrally fixed t...
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JP2794447B2 |
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JPH10231675A |
To take a boring device capable of simply and energy conservatively eliminating boring dust from a boring tool and driving torque out of a boring string in a ground bore hole. A hose 15 is held by a boring string 13 to prevent its rotati...
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JP2786476B2 |
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JP2784454B2 |
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JPH10196268A |
To form a longitudinal hole of sufficient depth while making a device compact and lightweight on the whole regarding a hole excavating device for excavating the longitudinal hole, relatively large in hole diameter and depth, in the groun...
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JPH10196284A |
To form a strong and compact whole structure by supporting a uniaxial quarrying drum on an extension arm/projecting part by a slender gear housing arranged in its center. A peripheral wall part 4 becomes wide to both sides in a rear part...
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JP2779690B2 |
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JP2779694B2 |
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JP2779665B2 |
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JP2771843B2 |
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JP2759512B2 |
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JP2747214B2 |
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JPH10115167A |
To prevent a lowering of the verticality of a bore in a drilling step of an earth drill method. In the earth drill device, mount bars 32 are attached to the upper part of a bucket 6 and buoyant bodies 31 are mounted on the top ends of th...
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JP2747213B2 |
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JP2741006B2 |
PURPOSE: To eliminate wears of a rod groove part and a rod chucking mechanism by rotating in a single piece the output shaft transmitting a torque to rod and the rod chucking mechanism. CONSTITUTION: When the cylinder 18 of a unchucking ...
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JPH1096385A |
To hold shafts of respective drilling rods in a fixed drilling direction so as to make correct ground excavation possible by journaling the respective drilling rods which are rotationally driven and journaled on the ground, with each oth...
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JP2738420B2 |
PURPOSE: To prevent a chuck band from being deformed and protect a chuck cylinder and a stationary band from being damaged as well and further enhance the excavation efficiency of a casing tube. CONSTITUTION: In a casing excavator based ...
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JP2737660B2 |
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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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JP2567312Y2 |
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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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JP2566905Y2 |
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JP2566720Y2 |
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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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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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JPH1072991A |
To make valve operation possible in one place by providing a water pressure regulating valve and measuring instruments together on the optional outer surface of a boring machine. This boring machine 10 is provided with propulsion mechani...
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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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JP2727267B2 |
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JP2724440B2 |
PURPOSE: To eliminate a leader mast when a rotatively driven spinning type excavating shaft such as an auger shaft is used, provide a compact and lightweight machine as a whole, and invariably maintain the stable state against the vertic...
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JP2721113B2 |
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JP2721629B2 |
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JP2715275B2 |
To effectively solidify a hole wall during an excavation, use a small and low-center of gravity type device as a driving machine rotatively driving a drilling rod, carry in and install the device even at a narrow place for stable work, a...
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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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JP2707054B2 |
PURPOSE: To perform boring operation at a small space simply and easily. CONSTITUTION: A gearing for rotary power and a rotary mechanism for a boring rod 1 are set in a main body box 2 through which the boring rod 1 is passed, which is s...
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JP2560502Y2 |
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JPH108868A |
To allow a pressed excavation process and a forced pile drive by applying the constitution that a bracket for mounting an auger drive motor and a pile forcing device is caused to slide via the expansion and contraction of a hydraulic cyl...
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JPH108867A |
To efficiently excavate even a soft rock-bed. Four drilling means 35 are rotatably fitted to a ringlike drilling edge 2 rotated at a front end part of a head excavating pipe. The drilling means 35 is provided with an rotational axis R wi...
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JPH09316932A |
To provide a working machine which is capable of manipulating a working machine, such as an earth auger device in combination with undulating and expanding motions of a boom in simple operation. This operation device is provided with a m...
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