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    • 14. 发明专利
    • EARTH DRILL BUCKET AND EARTH DRILL
    • JP2000234488A
    • 2000-08-29
    • JP3670699
    • 1999-02-16
    • SUGIZAKI KISO KKHITACHI CONSTRUCTION MACHINERY
    • IMAI KENJIMURAOKA TADASHIAIHARA YOSHIHIROSHIBA YOSHIMIHASHIMOTO KENTAROMURAYAMA TAKASHI
    • E21B11/00
    • PROBLEM TO BE SOLVED: To certainly open and close an earth take-in port with a rotary plate made to make a relative rotation by rotary movement of a bucket main body by a method wherein the rotary plate with excavation bits fixed thereto is rotatively mounted to a bottom lid of the bucket and the earth take-in port is made capable of being opened and closed. SOLUTION: For an earth drill bucket 1, a cylindrical part 2 is fixed to a cylindrical main body 1a through a radial frame and made capable of moving upward and downward with a guide rod inserted therethrough, bottom lids 6, 6 are rotatively mounted to the main body 1a through pins 5, 5, and earth take-in ports 8, 8 are formed between the bottom lids 6, 6. Then, a rotary plate 9 is rotatively mounted to the underside of the bottom lids 6 through guide grooves 11, and excavation bits 10 are fixed to end parts of the rotary plate 9. With the bucket 1 pressed against the ground and rotated at the time of starting excavation, the rotary plate 9 makes a relative rotation and opens the earth take-in port 8 for taking excavated earth into the bucket 1, and with the bucket 1 rotated in reverse rotation, the rotary plate 9 makes a relative rotation and closes the earth take-in port 8. Therefore, the earth take-in port 8 can be opened and closed certainly.
    • 17. 发明专利
    • DRILLING APPARATUS
    • JPH10140969A
    • 1998-05-26
    • JP30042996
    • 1996-11-12
    • HITACHI CONSTRUCTION MACHINERY
    • AIHARA YOSHIHIROMURAOKA TADASHI
    • E02F5/20E21D1/06
    • PROBLEM TO BE SOLVED: To easily arrange a gondola at a required position above an aimed drilling hole by anyone, in drilling apparatus provided with a gondola used for the works in the aimed drilling hole. SOLUTION: A guide rod 4 is inserted in an advanced hole 2 formed by the first excavating machine. The second excavating machine 5 is guided by the guide rod 4 to excavate an aimed excavating hole with a larger diameter than the advanced hole 2 and the second excavating machine 5 is moved up and down by a winch 7. The gondola 8 is hung by a hanging device 9 and loaded with necessary materials for the works in the hole. A traveling body 7A where the winch 7 is mounted and the hanging device 9 are charged so as to be horizontally transferable on a scaffold device 6. The traveling body 7A is integrally connected to the hanging device 9 through a connection rod 93 and the length of the connection rod 93 is set so that the gondola 8 is positioned right above the aimed excavation hole 3A when the second excavating machine 5 is disposed at a specified soil-discharging position β.
    • 18. 发明专利
    • HOLE DRILLING DEVICE
    • JPH10121876A
    • 1998-05-12
    • JP27483396
    • 1996-10-17
    • HITACHI CONSTRUCTION MACHINERY
    • MURAOKA TADASHIAIHARA YOSHIHIRO
    • E21B7/00E21D1/06
    • PROBLEM TO BE SOLVED: To connect guide rods which are divided in a comparatively short time irrespective of soft or hard soil property of a ground to be drilled. SOLUTION: An excavator 2 which digs a target hole to be digged in a ground 1 includes a stationary part 3 fixed on the ground 1 and a travelling part 5 which moves in the direction in which it leaves the stationary part 3 by a propulsion means 4, and the travelling part 5 is provided with a digging tool including an earth drill bucket 6 and a rotary means 9 which rotates the digging tool. Furthermore, a guide rod inserted into an advance hole of which diameter is set to a smaller diameter than the target hole to be digged consists of a ground guide rod 11 which is embedded in the ground 1 and of which upper end part 11a protrudes on a surface of the ground and an excavator guide rod 12 which is mounted on the excavator 2 and of which a lower end part 12b is connected with the upper end part 11a of the ground guide rod 11 in such a manner that they can be separated and is provided with a pair of pressing cylinders 14 which can fix a position near the upper end part 11a and release the fixation of this position.
    • 19. 发明专利
    • MULTI-AXIAL LOAD DETECTOR
    • JPH08166300A
    • 1996-06-25
    • JP31190094
    • 1994-12-15
    • HITACHI CONSTRUCTION MACHINERY
    • KUSAKI TAKAMIAIHARA YOSHIHIRO
    • G01L1/22G01L5/16G01L19/04
    • PURPOSE: To provide a wiring sheet for a multiaxial load detector in which deviation of strain gauge adhering position is not possible and for which a proper resistance for compensation can be used with no need of preparation of a plurality of insulating sheets. CONSTITUTION: A wiring sheet S is composed by putting a wire 2 for bridge circuit constitution, lands 13 at the tip thereof, lands 14 to be connected to resistance wires for compensation of the strain gauges 6, and lands 15 to be connected to resistance wires for temperature compensation of a span on an insulating sheet 11. Respective lands 13-15 are gathered in both end parts 11a, 11b of the insulating sheet 11. After the wiring sheet S is so set in a structural body of a multiaxial load detector as to make both end parts 11a, 11b positioned in the face in conformity with adhesion faces of the strain gauges 6, respective strain gauges 6 are connected to corresponding lands 13. If necessary, proper resistance wires for compensation are connected to the lands 14, 15.