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    • 12. 发明专利
    • UNDERGROUND EXCAVATING DEVICE
    • JPH11256992A
    • 1999-09-21
    • JP8282198
    • 1998-03-13
    • DAIHO CONSTRUCTION CO LTD
    • KASHIMA YUTAKATOMIZAWA TSUTOMUHONMA KIICHI
    • E21D9/087E21D9/08
    • PROBLEM TO BE SOLVED: To simplify the structure of a cutter driving unit by providing a crank in a rear end of a rotary driving body of a cutter unit, and fitting a connecting plate to the periphery of the rear end of the crank, and rotating the rotary driving body with plural fluid pressure jacks. SOLUTION: A rotary driving body 7 of a cutter unit 6 is supported freely to be rotated by a bearing 5 provided in a bulk head 3. A cutter spoke 8 is integrally fitted to a front end of the rotary driving body 7. A cutter driving unit 10 is provided with a crank 11, a connector 11 and plural fluid pressure jacks 18a, 18b, 18c. The crank 11 uses the rotary driving body 7 as a crank shaft, and a crank pin 13 is provided with a deviation by a deviation distance (e). A connecting plate 14 is provided in the periphery of the crank pin 13 freely to be rotated. The fluid pressure jacks 18a-18c are driven so as to push the crank pin 13 through the connecting plate 14, and the rotary driving body 7 is rotated so as to rotate the cutter 6. Structure of the device is thereby simplified without using parts requiring high accuracy such as a pinion and a gear.
    • 14. 发明专利
    • SHIELD ARM DIGGER
    • JPH01304298A
    • 1989-12-07
    • JP13217888
    • 1988-05-30
    • DAIHO CONSTRUCTION CO LTD
    • HAGIMOTO HIROMITOMIZAWA TSUTOMUHONMA KIICHI
    • E21D9/087E21D9/10
    • PURPOSE:To keep the pressure balance of a facing constant, and to prevent the breaking of the facing by providing a cutter face with a means forming both side ends of a slit to an arcuate surface or leveling the facing in which an arcuate protrusion is projected to the front of the cutter face. CONSTITUTION:Both side ends of slits 6 extending in the radial direction formed to both side sections of the cutter spokes 3 of a cutter face 5 are shaped to arcuate surfaces 6a with smooth curved surfaces constituting a means leveling a facing. The facing cut by the arcuate surfaces 6a is pressed down and leveled by revolving torque and jack thrust while rolling in clay and particulates in muddy water on excavation. The facing roughened by digging is given instantaneously self-supporting properties through consolidation, and an impermeable layer is shaped and water pressure is worked effectively. Arcuate protrusions are projected to the cutter face 5, or the arcuate surfaces and the arcuate protrusions may be combined.
    • 19. 发明专利
    • TUNNEL EXCAVATOR
    • JPH02176095A
    • 1990-07-09
    • JP33024288
    • 1988-12-27
    • DAIHO CONSTRUCTION CO LTD
    • HAGIMOTO HIROMITOMIZAWA TSUTOMUHONMA KIICHI
    • E21D9/087E21D9/08
    • PURPOSE:To contrive an excavating bit to be uniformly abraded by arranging one or a plurality of the rotary cutters of outer diameters smaller than those of respective circles, for enabling the cutters to rotate and revolve both on their axes and around the internal sections of the respective circles, without permitting the cutters to come in contact with other adjacent rotary cutters. CONSTITUTION:An excavator 1 is provided with a cocoon-shaped shield external- drum 11, sun cutters 3, 43 arranged on centers to revolve on their own axes, and two sets of planet cutters 4a, 4b, 44a, 44b arranged on the same diameter line for enabling them to revolve both on their own axes and around. On the cutters 4a, 4b or the like, a plurality of bits 8a, 8b or the like are respectively fitted. Then, the cutters 3, 43, the cutters 4a, 4b, and the like are respectively revolved on their own axes by a driving gear, and by another driving gear, the cutters 4a, 4b, and the like are revolved around, and cutter groups 2, 42 are rotated in the directions opposite to each other and at the same time, a cross section for excavation is excavated. Accordingly, the abrasion of the excavating bits can be uniformed and can be reduced.
    • 20. 发明专利
    • EXCAVATOR CUTTER DRIVING DEVICE
    • JP2000027593A
    • 2000-01-25
    • JP21649998
    • 1998-07-15
    • DAIHO CONSTRUCTION CO LTD
    • TOMIZAWA TSUTOMUHONMA KIICHIKANAI KAZUHIKO
    • E21D9/087E21D9/08
    • PROBLEM TO BE SOLVED: To provide an excavator cutter driving device in which the amount of oil supplied to each of jacks can be simply regulated, the angular velocity of rotation of the cutter can be set constant, energy efficiency can be improved, smooth shifting of the jacks can be done, the amount of electricity consumption can be reduced with a simple installation, abnormal rise of oil temperature during operation can be prevented and further excellent responsiveness can be eesured. SOLUTION: For an excavator cutter driving device wherein oil-hydraulic jacks 26A... serving as a plurality of jacks operated by fluid pressure are connected to a crank 21 and excavation is made at the ground with cutters connected to the crank 21 that is rotated by operation of the oil-hydraulic jacks 26A' in the plural number, a pressurized delivery pipe 37 for sending the fluid under pressure to each of the jacks 26A... is extended from an oil-hydraulic pump 35 serving as a pump for sending the fluid under pressure and branched for connection with each of the jacks 26A..., and thereby the fluid pressure is made constant with the jacks 26A... being connected with one another.