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    • 1. 发明专利
    • BORING DIRECTION CONTROL DEVICE FOR BORING MACHINE
    • JPH07166794A
    • 1995-06-27
    • JP31650593
    • 1993-12-16
    • SEKISUI CHEMICAL CO LTDSANWA KIZAI CO LTD
    • MIKI YASUSHISEKI NORISUKE
    • E21D9/093E21D9/06G01C15/00
    • PURPOSE:To restrain meandering of a pipeline by obtaining the travel amount of a guide pipe from the reaction caused by the oscillating and tilting operation of a lead pipe head, and computing a correction effect amount to set the releasing time of the oscillating and tilting operation with the actual shifting change amount of the lead pipe. CONSTITUTION:According to the change amount of the actual shifting amount of a lead pipe 2 at the time of starting the oscillating and tilting operation of a lead pipe head 3 and at the time of completing the oscillating and tilting operation, the oscillating and tilting operation of the lead pipe head 3. In this case, the travel of the lead pipe 2 caused by the reaction of the oscillating and tilting operation of the lead pipe head 3 is taken as one variable. Subsequently, according to the functional equation including a designated coefficient of correction, the correction effect amount is computed. Subsequently, the time of releasing the oscillating and tilting operation of the lead pipe head 3 is set according to the change amount of the actual shifting amount of the lead pipe after the completion of the oscillating and tilting operation and the correction effect amount. Thus, the direction is always automatically corrected suitably so as to restrain meandering in boring a tunnel for laying a pipe regardless of the property of soil to be drilled and continue boring according to plan.
    • 3. 发明专利
    • PIPE-HOLDING MECHANISM IN INSTALLATION DEVICE OF PIPE
    • JPH08144695A
    • 1996-06-04
    • JP28206394
    • 1994-11-16
    • SANWA KIZAI CO LTD
    • SEKI NORISUKE
    • E21D9/06
    • PURPOSE: To improve the performance, by providing a plurality of pipe holders having a loading side of a pipe and fitting a circular eccentric rotor at the center and fixing the pipe holders to a pipe receive portion by bolts inserted in the eccentric position of the eccentric rotors. CONSTITUTION: A plurality of ring-form indicating lines 18 showing expected outer diameters of buried pipes are scored on a pipe receive portion 7 and bolt holes 19 are provided between the indicating lines 18 of the lower half of receive portion 7. When pipe holders 10 are fitted to the receive portion 7, bolts 20 are inserted in bolt holes of eccentric rotors 13 of the holders 10. The bolts 20 are fastened loose into the bolt holes 19 at the position corresponding to the pipe diameter of the receive portion 7. A tool is fitted to the recessed part 17 for the operation, of the rotors 13 to rotate them and the holders 10 are vertically shifted to adjust the loading part of pipe to an appropriate position to hold the pipe P. The bolts 20 are finally fastened and the holders 10 are fixed together with the rotors 13 at the receive portion 7. In this way, the position of loading part of pipe can be easily adjusted in accordance with the pipe diameter and the pipe can be stably supported.
    • 4. 发明专利
    • PIPE BURYING DEVICE
    • JPH0828186A
    • 1996-01-30
    • JP16805494
    • 1994-07-20
    • SANWA KIZAI CO LTD
    • SEKI NORISUKE
    • E21D9/08
    • PURPOSE:To efficiently carry out drilling in accordance with the foundation even in the case of drilling the foundation mixed with an ordinary foundation and a hard foundation. CONSTITUTION:A drilling rotating cylinder 7 on the head end of a pipe to be buried and free to rotate and an auger screw 17 inserted into the pipe to be buried free to rotatively drive are furnished, and a plural number of roller bits 12, 12... for gravel crushing are installed free to rotate in the peripheral direction with equal intervals on the head end of the drilling rotating cylinder 7. An auger head 21 for ordinary foundation drilling is installed on the head end part of the auger screw 17, and the auger screw 17 is inserted into the drilling rotating cylinder 7 free to slide in the axial direction but not to rotate in the rotational direction. The auger head 21 is selectively positioned at a front or a rear position against the roller bits 12.
    • 5. 发明专利
    • SMALL-BORE PROPULSION DEVICE
    • JPH08210084A
    • 1996-08-13
    • JP33396994
    • 1994-12-16
    • OKAMOTO TATSUICHISANWA KIZAI CO LTD
    • OKAMOTO TATSUICHIHAMANO MAMORUSEKI NORISUKE
    • E21D9/06
    • PURPOSE: To discharge muck to the extent that the muck does not fit in between the blades of an auger screw by causing earth and sand crushed by a drilling device located at an end to be passed while crushed between following male and female crushers. CONSTITUTION: A crushing device for muck drawn into a chamber comprises a male crusher 23 provided on a connecting shaft 22 and a female crusher 21 placed at a predetermined interval to the male crusher 23 and wrapping the outer periphery of the male crusher 23. A carbide chip 25a is secured to the surface of each blade of a crusher plate 25 serving also as a guide plate for muck in the chamber, and thereby the muck drawn into the crushing chamber 26 is guided rearward and subjected to secondary crushing by a carbide chip 20a formed on the inner surface of a drum 20 and by the carbide chip 25a of the crusher plate 25 serving also as the muck guide plate. A conveyor 30 consisting of a cylindrical casing 31 and an auger screw 32 is provided in a position behind the muck crushing device comprising the male and female crushers 23, 21, to transfer the muck crushed into predetermined sizes to a starting vertical shaft.